Equipment description:

The equipment of the catch-chain through shot blasting cleaning machine consists of shot blasting cleaning room, shot blasting assembly, shot recycling purification system (screw conveyor, elevator, separator, projectile control system), catch-chain conveying system (self-provided by customers), maintenance platform, dust removal system, air control system, electrical control system, etc.

Conventional standard models:

Note: non-standard equipment can be customized according to product characteristics.

I. equipment composition and structural characteristics

The continuous catechang shot blasting equipment is mainly composed of shot blasting cleaning room, shot blasting assembly, shot recycling purification system, sealing auxiliary room, shot collection system, dust removal system and control.

1.1 shot blasting cleaning room and sealing auxiliary room

8 shot blasting device assemblies are designed for the side wall of the shot blasting cleaning room to ensure a comprehensive shot blasting cleaning of the cleaned workpiece. The inner wall of the hot area of shot blasting chamber is protected by wear-resistant manganese plate, with an average service life of more than 6000 working hours. The protective plate is installed with block-type structure, which is convenient for maintenance. The shot blasting device is arranged in an inclined way, which can be used for multi-angle casting. The shot blasting chamber is made of welded section steel and steel plate to ensure sufficient stiffness and strength.

The layout of shot blasting device is simulated by computer, and all the angles and positions are determined by computer design. On the basis of taking care of all the workpiece to be cleaned, the empty throwing of the projectile is reduced as far as possible, which maximizes the utilization rate of the projectile and reduces the wear of the cleaning indoor protective plate.

seal

The walking groove of the hook on the top of the cleaning room is in the form of full sealing. It adopts sealing shell plus 65Mn protective plate, multi-layer anti-wear polyurethane, and soft-connected nylon brush to form labyrinth sealing belt (Swiss +GF+ company technology), with delicate structure, preventing the projectile from bouncing to the outside of the room.

When the device is running automatically, after the projectile controller is closed, the projectile in the shot blasting device will not be cleaned in a short time. However, if the seal door is opened after the projectile is completely clean, the auxiliary time of shot blasting will be prolonged. For such equipment with high load and high productivity, the auxiliary time will greatly reduce the efficiency of shot blasting. In order to improve the efficiency of shot blasting, the two sides of the shot blasting chamber are added with high abrasion resistant steel rubber plate. This will greatly improve the efficiency of shot blasting, but also completely avoid the accident of projectile flying injuries.

security

The shot blasting device is designed with simple and reliable safety protection device, which can ensure the absolute safety of personnel entering the cleaning room when the equipment is repaired and lubricated.

Sealing auxiliary chamber

The inlet and outlet of the shot blasting chamber is equipped with a 1.6-meter long sealing chamber, and the sealing chamber is equipped with a 6-story elastic, high-abrasion resistant steel rubber plate, which has a good sealing effect and greatly improves the operator's working environment.

1.2 shot thrower assembly

The shot-blasting apparatus used in this machine has the characteristics of strong, precise manufacture and high energy.

It has the following advantages:

? high efficiency: with special pellet wheel structure, shot blasting efficiency can reach 16kg/min·kW.

Blade quick installation:  this shot blasting machine blade, it does not need to be fixed screw, direct marketing, such as spring clip fixture, but by centrifugal force automatically lock, replace the eight leaves just 5 to 10 minutes.

? the fixed shaft on the shell and the hole of the directional sleeve are processed at one time: in this way, the gap between the directional sleeve and the separating wheel is even and consistent, which not only reduces the wear of the separating wheel and the phenomenon of squeezing the directional sleeve, but also greatly improves the shot blasting efficiency.

, shot blasting device fixed on the impeller body: 8  a long slot and hole of the blade shape tolerance accuracy is quite strict, need special processing center, a clamping must be on the impeller of dividing mill roughly ─ ─ finish-milling, dividing ─ ─ ─ enlarge hole reaming drilling process, such as a complete, to ensure the balance of shot blasting machine, the balance of its torque between 12 ~ 15 n, mm, lower equipment noise at the same time.

? limit device of shot blasting device: when the top cover of the shot blasting device is opened for maintenance, the device cannot be started to ensure the safety of maintenance personnel.

V basic technical indicators

? projectile projectile velocity: ≥80m/s

? impeller dynamic balance detection 12-15n ·mm

? radial runout of the impeller body ≤0.12mm

? impeller body end jump ≤0.05mm

? the temperature rise of the main bearing seat is ≤35℃ when it is empty for 1 hour

? blade material Cr20S, chromium content ≥ 22%, service life ≥500h

? split shot wheel and directional sleeve material Cr20S, chromium content ≥ 22%, service life ≥1500h

? sheet metal Cr20S, chromium content ≥ 22%, service life ≥4000h

? impeller material 20CrMnMo, service life ≥10000h.

V fragile parts of shot blasting device

? impeller: the impeller is carburized and quenched with 20CrMnMo material; Action balance processing.

? blade: made of special wear resistant cast iron with high chromium, the surface hardness after heat treatment is ≥HRC65, with high wear resistance and service life; The blade weight difference of each shot blasting device is ≤2g.

? directional sleeve: fully closed dial type, easy to adjust the shooting Angle and throwing direction, made of high chromium special wear resistant cast iron, surface hardness ≥HRC65 after heat treatment.

? pellet wheel and protective plate: all made of high chromium special wear resistant cast iron, the surface hardness after heat treatment ≥HRC65.

? housing: the housing is made of high quality welded steel plate with interlocked labyrinth high chromium special wear resistant cast iron protective plate with long service life and interchangeable inner lining.

1.3 pellet circulation purification system

Pellet circulation purification system can be divided into circulation system and pellet separation purification system, which consists of screw conveyor (or vibration conveyor), slip pellet tube, bucket elevator, pellet sand separator, pellet gate valve, pellet conveying tube, filling device and so on. The projectile controller, screw conveyor, bucket elevator and pellet separator of the system are interlocked in the electronic control system: the latter process does not work, and the former process cannot run, so as to avoid equipment failure caused by projectile blockage.

Screw conveyor

The screw conveyor is composed of cycloidal needle wheel reducer, screw shaft (screw blade adopts 16Mn), conveying cover and bearing with seat.

This part has been serialized by our company, with high universality, high interchangeability and stable and reliable performance. The whole screw shaft is processed by welding, thus ensuring the coaxiality of both ends of the screw shaft and improving the operation stability.

Bucket elevator

The bucket elevator is composed of cycloidal needle wheel reducer, up and down roller, conveying tape, hopper, sealing cylinder and tensioning device.

The characteristics of

? the shell adopts bending forming welding structure. The side is provided with access door for maintenance and replacement of hopper. Movable doors are installed on the front and side of the lower cover to repair the lower drive and eliminate the blockage of the bottom projectile.

? centrifugal gravity blanking. When working, the hopper fixed on the conveyor belt will scrape the pellet material at the bottom, and the pellet material to the top, and then by centrifugal gravity way blanking.

? special belt, high strength, tensile.

? adopt the up-regulated type, use the belt with anti-elongation, with the belt skidding alarm function.

? the pulley adopts a squirrel-cage structure with a slightly protruding middle, and each spoke is processed by chamfering. It not only improves the friction between the lifting belt and the belt pulley, avoids the slippage of the old smooth belt pulley and the slippage of the belt pulley, but also reduces the pretension of the lifting belt and prolonging the service life. At the same time, it avoids the influence of scattering bullets embedded between the pulley and the belt on the transmission.

? the lower shaft of the hoist is equipped with a pulse wheel, which can detect the working state of the hoist. Once the failure of the lower shaft does not turn, the signal can be timely fed back to the PLC for processing, and through the alarm alarm, to ensure the safe operation of the equipment.

? 10% margin for lift. Because the hoist by centrifugal gravity way blanking, each blanking, there will always be part of the material back to the hoist, so the appropriate increase in the amount of lifting. 

Pellet separator

This machine adopts the most advanced overflow induction type (or automatic adjustment of heavy hammer) full curtain multistage air separator, which is produced by our company by introducing Swiss technology +GF+. DISA.

composition

Selection, filter screen, conveying screw, heavy hammer regulator, pellet bin, pellet control brake, etc

The working principle of

The pellet sand mixture flowing in from the bucket elevator is driven by the conveying screw to evenly distribute the pellet sand mixture along the whole length of the separator, and finally reaches the end of the separator so that the pellet dust mixture always forms a curtain. Under the condition of full curtain, the pellets in the flow curtain are separated from metal oxide skin fragments, broken pellets and dust effectively by the principle of gravity wind separation. The large particle wastes are blocked by the screen, while the small pellets and dust flow out from the waste outlet, and the pellets are recycled into the shot bin. The separation efficiency of the separator can reach 99.5%.

Projectile distribution system

Adopt air control shot gate valve, depend on the cylinder to blast the quantity of remote control. It can avoid the phenomenon of motor burnt out, shot blasting device blocked, empty shot blasting and injury caused by the general controller's loose closing.

1.4 catenary conveyor

catenary

This machine adopts light die forging detachable chain, single hook bearing 200kg.

drive

The hook drive for the chain drive, by planetary reducer drive to obtain the required power and speed.

Rise up

It is composed of joint movable rail, sprocket group, trolley frame and heavy hammer tension device. It is used to compensate the manufacturing error of chain length and track length, which is beneficial to the installation of the chain and compensates the influence of the increase of chain pitch caused by wear during operation, so as to maintain the tensioning state of the chain and eliminate the possible multiple tensioning force in the line.

The tensioning device of this machine makes the roller on the frame of the car roll by the gravity of the counterweight hammer, driving the roller set to move, achieving the purpose of automatic tensioning.

1.5 shot blasting and dust removal system

We choose the most advanced reasonable secondary dust removal mode and the unique and effective dust removal structure:

? the first-level dust removal is designed for the projectile settling chamber on the top of the equipment. The settling chamber is an inertial settling chamber conforming to the aerodynamic principle, which can realize the effective settling of the projectile without causing pressure loss. In addition, a unidirectional valve is designed in the lower part of the settling chamber to prevent the formation of pneumatic conveying, which can effectively realize the projectile settling. The purpose of this stage of dust removal is to solve the problem of pipe sand absorption and sand deposition.

This kind of dust removal can not only solve the problem of sand absorption and sand accumulation of pipeline, but also save projectiles for users.

The system includes a dust collector main engine, settling chamber, fan, fan pipe, connection pipe between the dust collector and main engine, etc.

Reach more than 99.5%  dust removal efficiency, emissions acuities were 100 mg/m3, accord with GBJ4-73 industrial "three wastes" emissions standards. The dust collector housing is made of welded steel plate with a separate access door.

? the first-level dust removal is designed for the projectile settling chamber on the top of the equipment. The settling chamber is an inertial settling chamber conforming to the aerodynamic principle, which can realize the effective settling of the projectile without causing pressure loss. In addition, we design a unidirectional valve in the lower part of the settling chamber to prevent the formation of pneumatic conveying, which can effectively realize the projectile settling. This kind of dust removal can not only solve the problem of sand absorption and sand accumulation of pipeline, but also save projectiles for users.

? two-stage dedusting is a time-tested, economical and practical bag filter. The dust remover adopts vibrating motor mechanical ash removal system, which has the advantages of economic application and good ash removal effect.

4.6 electronic control system

? all lines are controlled by PLC, which can realize manual and automatic operation.

? catenary transmission speed is controlled by frequency converter, which can be stepless.

? automatic control of the whole line can be realized by setting the sub-console at the loading and unloading station, etc., and the sub-console can control the station separately during debugging. The sub-console is equipped with emergency stop switch, which can control the station or stop the whole line under special circumstances.

? the entrance of the production line, the access door of the shot blasting room and other important parts are equipped with safety interlocking switch devices.

? an ammeter is used to display the current of the shot blasting device;

? this system realizes the centralized control of shot blasting machine. The system can be based on user requirements programmable logic controller (PLC) as the core, the use of high-quality electrical components, with reliable work, high degree of automation, protection functions complete and many other advantages.

? the main power supply of the system is 3~, 380v ac power supply, and the control loop is single-phase 220v ac power supply. The control transformer will drop the 380v voltage to 220v and then use it in the control loop.

? the system has a relatively complete fault alarm function, to help operators or maintenance personnel quickly find fault points, reduce downtime, improve work efficiency.

? electrical and electronic control cabinet design, production in accordance with the international electrical specifications and safety standards.

? the projectile circulation system of the whole equipment, including the elevator, separator and screw conveyor, adopts automatic detection device. When a part is not running smoothly or stuck, it can automatically alarm and inform the fault location, so that the maintenance personnel can make targeted maintenance