CN111491709B - Bag collector ash removal device - Google Patents

Abstract

A bag collector ash removal device is provided with a movable injection tube device for back-blowing gas pulse injection of ash removal, an injection tube (6) with a nozzle (9) performs reciprocating linear movement to inject filter bags (22) at different positions, one end, close to an air bag pulse valve (1), of a gas pipe (5) between an air bag (2) and the injection tube (6) is not displaced, and one end, close to the injection tube (6), is displaced along with the injection tube.

Description

Bag collector ash removal device

Technical Field

The utility model relates to a dust cleaning device of a bag type dust collector, belonging to the field of environmental protection dust treatment.

Background

A complete bag-type dust collector body, taking a mainstream vertical external filter type dust collector as an example, is provided with an ash bucket, a filter chamber, an air inlet channel connected with one side of the filter chamber, a valve possibly arranged, an air purifying chamber, an air outlet channel connected with the air purifying chamber and a valve possibly arranged from bottom to top. The ash bucket is used for storing dust and periodically discharging the dust through an ash discharge valve arranged on the ash bucket. The filter chamber is internally provided with a large number of cylindrical filter bags made of filter materials, and the filter bags are hung on the pattern plate. The pattern plate is also called a porous plate, and refers to a steel plate provided with a filter bag mounting hole and used for isolating a filter chamber from a gas purification chamber. The filter bag mouth and the flower plate mouth are sealed by a steel expansion ring. This structure forms the basic unit of the bag house. The working process is as follows: the gas to be dedusted firstly enters the air inlet channel, secondly enters the filter chamber, then passes through the filter material from the outside of the filter bag in the filter chamber to enter the filter bag, and then passes through the upper opening of the filter bag to enter the air purifying chamber and finally enters the air outlet channel to leave. When the gas passes through the filter bag, the dust is filtered and attached to the outer surface of the filter bag. The dust cleaning device is arranged in the air purifying chamber, when a certain amount of dust on the outer surface of the filter bag is gathered by the dust cleaning device, the back blowing airflow is injected into the filter bag through the opening of the filter bag, so that the filter bag rapidly expands outwards to remove the gathered dust on the outer surface of the filter bag. The filter bag for removing dust recovers the state of filtering the gas to be removed dust with low resistance. The whole process of the dust removal operation is completed in a repeated way.

The conventional dust removing device can be divided into two types with respect to the implementation time of blowing a gas medium into a dust removing filter bag from a clean gas side. One is pulse blowing of millisecond order, and the other is continuous back blowing or pulsating back blowing of second order. The working forms of the injection tube for pulse injection are divided into two types, one type is line injection, namely each line of filter bags is provided with the injection tube fixed by the filter bag; the other is rotary blowing, namely, blowing is carried out by rotating and moving a blowing pipe.

The defects of line injection are that the number of injection pipes and the number of pulse valves are large, the filter bag is inconvenient to replace, and the space arrangement does not adopt the low-pressure large-flow injection pipes.

The disadvantages of rotary blowing: on the one hand, because the nozzles at different radius positions on the rotating arm rotate in different strokes at the same time, the center distances of the filter bags arranged on different radii on the circumference are the same. Thus causing the nozzle to fail to align with the bag mouth of the bag to be cleaned. On the other hand, four corners of the square box body for accommodating the cylindrical bag bundles can not be provided with filter bags, so that space waste and investment increase are caused. The Nedman has a reciprocating linear back-blowing moving device, but adopts second-level continuous back blowing, has no pulse air bag and pulse valve, has poor dust cleaning capability and is not suitable for customers who are difficult to clean dust.

CN104226038A (201410529223.7) discloses a pulse bag type dust collector, including last box, well box, ash bucket, air inlet, gas outlet, ash discharge valve, gas bag, pulse valve, still include a triaxial motion positioner, an integration jet-propelled head that collects nozzle, venturi and scalable airtight pressure cover as an organic whole to and a program controller and a sensor, adopted the cylinder filter bag simultaneously. The three-axis movement positioning device is arranged in the upper box body, the integrated air nozzle is arranged on one axis of the three-axis movement positioning device, and the integrated air nozzle can position the integrated air nozzle above the filter bag and is in butt joint with the filter bag; the filter bag can be disassembled and assembled in a pulling and inserting mode; the program controller can control the positioning of the air nozzle, the air injection amount and the time interval; the sensor can detect whether the filter bag needs to be cleaned in time. The technical spray head can only spray one filter bag at a time, the operation efficiency is low, a three-dimensional motion positioning device is required to be arranged, the equipment is complex, the reliability is low, and the investment is large.

CN202569829U (201220198774.6) discloses a rotary positioning pulse back-blowing bag type dust collector, which is formed by connecting a plurality of dust-collecting channels in parallel; the dust removal channel comprises a support, an ash collecting hopper, a back-blowing air box, a shell, an air inlet smoke box, a filter bag, a back-blowing air box, a pattern plate, a box cover, a flow guide cover, a rotary positioning pulse back-blowing ash removal mechanism, a top cover, an air outlet smoke box, a shell, a bag cage and a control system. Because the technology adopts the pulse reverse blowing, the continuous reverse blowing belongs to the second-level continuous reverse blowing, the ash removal capability is poor, the technology is not suitable for clients with difficult ash removal working conditions, and the utilization rate of reverse blowing energy is low.

Furthermore, during the pulse deashing of bag collector, will great pressure's gas jet blow into the sack in the time of the utmost point short for the bag body is bloated, and bag body surface adhesion's dust receives acceleration that the bag body gave and the effect of bag body deformation to drop from bag body surface, thereby realizes the purpose to the bag body deashing. However, because the pulse injection time is short, negative pressure always exists in the box body, after the pulse injection, dust which is just fallen off under the injection action is easily under the action of the negative pressure and returns to the bag body again, so-called secondary dust raising in the industry is formed, the secondary dust raising can cause the reduction of the injection dust removal effect, and the high-efficiency bag body dust removal cannot be realized. At present, the problem of secondary dust emission is solved by adopting an off-line method of an integral box body in the industry, but an additional box body is added in the method, so that the occupied area of the dust remover is increased, and the investment cost is also increased.

The utility model is provided to solve the problems of the above aspects.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the bag type dust collector dust cleaning device which has strong dust cleaning force, is convenient for replacing the filter bag, improves the dust cleaning efficiency, is beneficial to densely arranging the filter bag and greatly reduces the investment.

A bag type dust collector ash removal device comprises a moving vehicle, an injection pipe and an air bag; the method is characterized in that:

the blowing pipe is fixed on the moving vehicle or is a part of the vehicle body, and can move along with the moving vehicle;

the air bag is provided with a pulse valve;

the pulse valve on the air bag is connected with the blowing pipe through a gas pipe;

one end of the gas pipe close to the gas bag pulse valve is not displaced, and one end close to the injection pipe is displaced along with the injection pipe.

The blowing pipe is provided with a plurality of nozzles which at least cover one row of filter bag openings.

Because the injection pipe is provided with a plurality of nozzles covering at least one row of filter bags, the nozzles can be moved to any row or a plurality of rows of filter bag openings needing to be injected along with the mobile vehicle, and therefore, preferably, only one injection pipe and one pulse valve need to be arranged on one dust remover main body.

Compared with the line blowing, the technology overcomes the defect that each line of filter bags needs to be provided with an injection tube and a pulse valve. In line injection, each line of filter bags needs to be provided with an injection tube and a pulse valve, so that the arrangement of the injection tube and the pulse valve is limited by positions, and the tube diameter and the injection air volume are limited; the movable blowing pipe can use a pulse valve with a larger pipe diameter, and has larger blowing air quantity and wind speed and higher blowing efficiency. Compared with the proposal disclosed in CN104226038A, the nozzle and the flower plate always keep a certain height distance and do not move in the height direction. The injection tube is provided with a plurality of nozzles covering at least one row of filter bags, and at least one row of filter bags is injected at one time, so that the injection tube only needs to move in one direction, namely, compared with the three-dimensional movement of the nozzle of the comparison file, the single nozzle of the scheme only does one-dimensional movement. The complex degree of the movement mechanism and the sensor system is greatly reduced, the reliability is improved, meanwhile, one row of filter bags are sprayed at a time, the operation efficiency is improved, and the operation energy consumption is reduced. In addition, compare in the file scheme of comparison and keep a determining deviation always with the filter bag sack in this case nozzle, be favorable to pulse air current to produce the secondary drainage, make the deashing tolerance increase, have better deashing effect under same pulse width, pressure and flow. Compared with the proposal of using pulse back blowing disclosed by CN202569829U, the ash cleaning device is provided with an air bag and a pulse valve, and compressed air with the pressure of 0.85 kilogram or more is used for pulse ash cleaning. In the contrast scheme, the fan is used for directly blowing air to the filter bag, and the filter bag is characterized by low pressure, large air quantity and long duration. The ash removal of the filter bag depends on the acceleration of the surface of the filter bag caused by ash removal airflow, and the larger the acceleration is, the better the effect of shaking off the accumulated ash on the surface of the filter material is. The magnitude of the acceleration is directly related to the power of the deashing airflow, namely, the larger the power of the deashing airflow is, the larger the acceleration obtained on the surface of the filter material is. Obviously, assuming that the same fan is used as a source, the mode of directly blowing air to the filter bag has low pressure and long time (lasting ten seconds or more), and the pulse mode of using the air bag and the pulse valve stores the energy produced by the fan in the long time through the air bag, releases the energy in an extremely short time (0.1 or 0.2 seconds) through the pulse valve, improves the power of the deashing air flow by two orders of magnitude compared with the direct blowing mode (including the direct blowing pulse mode), and naturally, the deashing effect is far better than that of the scheme of directly blowing air in the comparison document. In addition, although the pulsation formed by blocking the mechanism can cause the vibration effect, the energy between the pulses is completely wasted, and the vibration period is in the second order; all energy of the pulse formed by the air bag and the pulse valve is utilized and released within millisecond time, and the amplified power of the pulse valve can cause larger acceleration and generate stronger vibration ash removal. Therefore, the dust cleaning effect by using the air bag and the pulse valve (i.e. pressure pulse in the industry) is obviously better than that by directly blowing the filter bag by using the fan (i.e. micro-pressure back blowing in the industry). In fact, the pressure pulse is the main ash removal technology in the market at present, and the reason is that.

The ash removal device of the bag type dust collector has the specific structure that: the bag type dust collector ash removal device comprises a moving vehicle, an injection pipe and an air bag; an air bag is arranged outside the air purifying chamber and fixed outside the shell of the air purifying chamber. The inlet of the air bag is connected with a fan or a compressed air pipe network, the air bag is provided with a pulse valve, the outlet of the pulse valve is connected with an air outlet pipe of the air bag, the air outlet pipe of the air bag penetrates through the shell of the air purifying chamber of the dust remover to enter the air purifying chamber, the shell penetrates through the shell and is hermetically welded with the shell, and the air bag is fixed. The air outlet pipe of the air bag entering the air purifying chamber is connected with the air delivery pipe. The end of the gas pipe close to the air bag pulse valve is not displaced, and the end can be completely and fixedly connected with the air bag outlet pipe or connected by movable pipe fittings such as a rotary joint and the like. The other end of the gas pipe is connected with the middle part, the end part or both of the movable injection tube, the end is displaced along with the injection tube, and the end can be completely and fixedly connected with the gas inlet of the injection tube or connected by movable pipe fittings such as a rotary joint. Moving parts such as a rotary joint close to the air bag can be arranged in the air purifying chamber shell and can also be arranged outside the air purifying chamber shell. The blowing pipe is fixed on the moving vehicle or is a part of the vehicle body. The injection pipe is provided with a plurality of nozzles at least covering one row of filter bag openings, and the space between the nozzles can be accurately aligned and determined with the filter bag openings below one by one.

At present, the pressure of a large amount of used high-voltage pulses is more than 0.3MPa, and the high pressure easily damages the filter material of the filter bag and influences the service life of the filter bag. Preferably, the pulse injection pressure is selected to be about 0.1MPa, and the corresponding flow is increased, so that the strong dust cleaning capacity can be kept, and the service life of the filter bag is not influenced. However, the increase of the blowing flow requires the pipe diameter of the blowing pipe to be thickened, and the space of the existing blowing scheme cannot be arranged. The important characteristic of the technology is to provide a one-valve one-pipe multi-nozzle linear moving ash removal device which meets the requirements.

The pulse time of the back-blowing gas rushing out of the gas bag is within 10-500 milliseconds, the pulse time within an optimized range is generally within 50-500 milliseconds, the pulse time within an optimized range is within 50-300 milliseconds, and more favorably within 150-300 milliseconds. More preferably, the pulse time for the blow-back gas to rush from the gas bag is 10 milliseconds, 20 milliseconds, 30 milliseconds, 50 milliseconds, 80 milliseconds, 100 milliseconds, 120 milliseconds, 140 milliseconds, 160 milliseconds, 180 milliseconds, 200 milliseconds, 220 milliseconds, 240 milliseconds, 260 milliseconds, 280 milliseconds, 300 milliseconds, 320 milliseconds, 340 milliseconds, 360 milliseconds, 380 milliseconds, 400 milliseconds, 420 milliseconds, 440 milliseconds, 460 milliseconds, 480 milliseconds, 500 milliseconds, or a range of any two of the foregoing.

The pressure of the gas in the gas bag before pulse injection is 0.05-0.7MPa, the optimized range is 0.05-0.3MPa, and the more advantageous range is 0.05-0.1 MPa. The problems are solved by utilizing the technology because the gas flow required by low-pressure pulse is large, the pulse valve is large, the injection pipe is thick, the investment is large, and the line injection mode is difficult to arrange. More preferably, the pressure before the gas pulse in the gas bag is injected is 0.05MPa, 0.06MPa, 0.07MPa, 0.08MPa, 0.09MPa, 0.1MPa, 0.15MPa, 0.2MPa, 0.25MPa, 0.3MPa, 0.34MPa, 0.4MPa, 0.45MPa, 0.5MPa, 0.55MPa, 0.6MPa, 0.65MPa, 0.7MPa or a range of any two of the above numerical values.

In at least one preferred embodiment of the utility model, the injection pipe is arranged on the gas-free side of the card and can be moved with the carriage in a plane parallel to the card. Because the injection tube can be used for cleaning dust in at least one row of filter bags at a time, the injection tube only needs to move in the direction vertical to the injection tube, namely the injection tube moves linearly in the plane parallel to the pattern plate. Preferably, the blowing pipe is linearly reciprocated. Therefore, the injection pipe can be used for injecting filter bags at different positions in the linear reciprocating motion. And any row of filter bags can be selectively aimed for blowing, so that jump blowing is realized. Compared with rotary pulse injection, the nozzle has the advantages that the nozzle can be accurately aligned with the bag opening, the injection efficiency is high, and the ash removal effect is good.

In at least one preferred embodiment of the utility model, the bag-type dust collector ash removal device is also provided with one or more rails; the blowing tube moves along at least one track.

In at least one preferred embodiment of the utility model, the bag-type dust collector dust cleaning device is also provided with a limiting device, the limiting device is arranged between the injection pipe and the track, and the injection pipe moves along at least one track through the limiting device. The limiting device is a catch wheel or a wheel rim. The movable vehicle can be provided with a blocking wheel close to the side surface of the track to limit the movable vehicle body from sliding under the action of force vertical to the track. The blocking wheel is composed of a roller, a shaft, a bearing, a supporting frame and the like, the blocking wheel is connected to the moving vehicle through the supporting frame, the surface of the roller and the side face of the rail are positioned according to the limiting requirement, or the wheel of the moving vehicle is provided with a wheel rim, and the moving vehicle is limited to move along the direction perpendicular to the rail. The existence of the limiting device can ensure that the ash removal device of the bag type dust collector does not derail along the track motion.

When two or more tracks are provided, a limiting device can be arranged on one track, and the other track is a free end.

In at least one preferred embodiment of the utility model, the mobile vehicle is connected with a dragging mechanism for traction through a transmission device; the dragging mechanism is a motor or an electric motor, and the motor is a pneumatic motor or a hydraulic motor; the transmission device is one of the following devices:

the gear and rack transmission is at least composed of a set of gear, shaft, bearing, shaft coupling and rack, the rack is fixed on the pattern plate along the direction vertical to the pattern plate hole, and the length of the rack can cover all filter bags. The gear is connected to a speed reducer fixed on the moving vehicle through a bearing, a shaft and a coupling and is dragged by a motor or an electric motor. The gear is engaged with the rack. After the gear is dragged and rotated, the moving vehicle is driven to do reciprocating linear motion.

Track and wheel transmission: the structure and the connection relation of the device are the same as those of a gear and a rack, and the device only has no tooth meshing and makes the moving vehicle perform reciprocating linear motion by virtue of friction force. The chain is in transmission with the chain wheel: the device is characterized by at least comprising a set of at least two groups of fixed chain wheels, shafts, bearings, supporting seats, a chain and the like, wherein the chain wheels are fixed on the supporting seats through the shafts, the bearings and other components, the supporting seats are fixed on the shell of the air purifying chamber, the chain is assembled on the two chain wheels in series and meshed, the two ends of the chain are fixed on a moving vehicle, the moving vehicle is supported on a track through wheels and a limiting device, and the track is fixed on a pattern plate along the direction perpendicular to an injection pipe and can reach the injection positions of all filter bags. The shaft of one chain wheel is connected with a speed reducer and is dragged by a motor or an electric motor so as to realize the reciprocating linear motion of the blowing pipe.

Rope and pulley transmission: the structure and the connection relation of the device are the same as those of chain and chain wheel transmission, and the moving vehicle can do reciprocating linear motion only by virtue of toothless meshing and friction force.

The moving vehicle can also adopt other transmission mechanisms, dragging mechanisms and combination modes of the transmission mechanisms.

In at least one preferred embodiment of the utility model, the bag-type dust collector soot cleaning device, the blowing pipe is limited by the slide block or the guide wheel, moves along at least one track, and is dragged by a closed transmission cable chain formed by a certain number of fixed chain wheels or fixed pulleys and the blowing pipe through at least one chain or rope, in each closed transmission cable chain system, at least one fixed chain wheel or fixed pulley is a driving wheel, the shaft of the driving wheel is connected with a speed change mechanism and a motor outside the clean air chamber box, and the driving wheels of a plurality of closed transmission chains are coaxially and synchronously rotated.

For example, one blowing tube (6) of an existing pulse-row blowing system replaces all blowing tubes in a dust collector box, or even more. A moving vehicle is provided, and the blowing pipe is fixed to the vehicle body or is a part of the vehicle body, and a rail (7) is provided for the blowing pipe. A gas transmission pipe between the injection pipe (6) and the pulse valve (1) on the air bag (2) is made into a sleeve (5) with a rotatable head part and a telescopic middle part; or a hose (20) with two fixed ends and a middle part capable of bending and deforming is made. The blowing pipe is driven to do reciprocating linear motion on the rail through the rope transmission, the chain transmission, the gear rack transmission, the rail wheel transmission or the like driven by the motor, the pneumatic motor or the hydraulic motor, so that the movable bag type dust collector blowing pipe dust cleaning device similar to a travelling crane in a factory building is formed. Wherein, if chooseing for use rope or chain transmission, can design the hookup location and the number of rope or chain according to actual conditions to the atress is balanced when guaranteeing the locomotive operation, operates steadily, reduces the running cost and increases life. Thus, the injection pipe can be moved to the positions above the filter bags along with the moving vehicle, and the defect that each row of filter bags needs to be provided with the injection pipe and the pulse valve is overcome. Compared with rotary pulse injection, the rotary pulse injection machine has the advantages of accurate positioning of the nozzle and the bag opening, high injection efficiency and good ash removal effect.

At present, most of dust collectors are outer filter bag type dust collectors with vertically arranged filter bags, long bags are vertically arranged, and flower plates are horizontal. Aiming at the dust remover, the injection pipe is horizontally arranged above the pattern plate (on the clean air side) and does horizontal linear reciprocating motion on a plane which is parallel to and slightly higher than the plane of the pattern plate. The height of this plane of movement is such that the nozzles on the blowing tube can pass through and do not scrape against the filter bag and/or the head of the bag cage, while the height is considered to be beneficial for the blowing air flow to form the secondary flow.

If the filter bag is not horizontally arranged, such as the pattern plate is vertical, the trolley and the injection tube and the corresponding mechanism need to be vertically arranged.

In at least one preferred embodiment of the utility model, the air delivery pipe of the bag-type dust collector ash removal device is a hose or a sleeve. Because the gas transmission pipe is connected with the fixed gas bag and the blowing pipe which can do linear reciprocating motion, the gas transmission pipe has the functions of deformation, expansion, contraction and/or rotation. The cannula can take three forms: one is in a longitudinal swing mode, the large sleeve and the small sleeve stretch and swing in a vertical plane, and the rotary joint also rotates in the vertical plane; the second is in a horizontal swing mode, the large and small sleeves stretch and swing in a plane, and the rotary joint also rotates in the plane; and thirdly, the sleeve is in a push-pull mode, does not swing and only stretches along a straight line without a rotary joint. When the hose is selected, the middle part of the hose can be bent and deformed so as to be bent and deformed along with the movement of the blowing pipe, and the blowing requirement is met.

When the sleeve is selected, the two ends of the gas pipe of the bag type dust collector ash removal device are provided with rotary joints. A rotary joint is a joint seal that can feed fluid media from a stationary conduit (the air bag outlet tube connected to the pulse valve) into a rotating or reciprocating device (the casing). The inlet and outlet of the rotary joint can rotate relatively. In the scheme, the inlet of the rotary joint connected with the air bag (connected with the air bag) is fixed, and the outlet of the rotary joint connected with the telescopic sleeve can rotate relatively; the rotary joint connected with the injection pipe has the inlet (connected with the telescopic sleeve) rotating relative to the injection pipe, and the outlet (connected with the injection pipe) fixed relative to the injection pipe, but the inlet and the outlet move horizontally and linearly back and forth along with the injection pipe. The rotary joints at the two ends can effectively realize pipeline sealing in the blowing process. The ash removing airflow is sprayed out of the air bag through the first rotary joint, enters the straight-line-section large and small sleeves, and is discharged from the rotary joint at the other end to enter the air conveying pipe.

In at least one preferred embodiment of the utility model, the sleeve is two or three sections of sleeves, wherein the middle section of the sleeve is a large pipe and a small pipe which are overlapped and sleeved with each other. Along with the removal of locomotive and jetting pipe, the distance and the angle between jetting pipe and the gas bag constantly change, and the gas-supply pipe length that needs also changes thereupon, and the big small sleeve pipe of straightway clearance fit can be followed axial relative motion under the effect of drawing, pressure this moment to realize the requirement that gas-supply pipe length needs the change. The inlet and outlet of the rotary joint at the two ends rotate relatively to meet the requirements of the blowing pipe on the distance and the angle when the blowing pipe blows filter bags at different positions.

When the air purifying chamber is short (half a meter), in order to ensure that the blowing pipe has enough moving range, the telescopic pipe can be arranged in a plane parallel to the pattern plate in a telescopic and swinging manner. At this moment, the gas pipe is 3-5 meters long generally, and the middle part can droop naturally under the action of gravity during operation, so that the multi-section sleeve pipe has a non-coaxial phenomenon, and the friction resistance is increased during relative motion, thereby influencing the service life of the gas pipe. In order to solve the problem, the hanging device can be arranged in the middle of the gas pipe, so that the abrasion caused by the natural sagging of the middle part can be effectively reduced. The hanging device can be in a spring type, namely a fixed track is arranged above the gas pipe, a sliding block is arranged in the track, and the sliding block is connected with the gas pipe through a spring device; or a lifting heavy hammer type, namely a fixed track is arranged above the gas pipe, a sliding block is arranged on the track, a fixed pulley is arranged on the sliding block, a fixed pulley is arranged at a proper position of the box cover, and the heavy hammer is connected with the gas pipe through two fixed pulleys by a rope. When the gas pipe is a hose, the middle part of the gas pipe can be hung in the two modes, so that the hose is prevented from being contacted with other objects to cause abrasion; when the air pipe is a sleeve, the middle part of the air pipe can be hung in the two modes, and the friction force of relative movement of the sleeve can be reduced.

Preferably, in at least one preferred embodiment of the present invention, at least one outer support roller is arranged at a contact force receiving portion of the end of the straight section of the outer sleeve of the telescopic large and small sleeves and the inner sleeve, or at least one inner support roller is arranged at a contact force receiving portion of the end of the straight section of the inner sleeve and the outer sleeve; the outer support roller and the inner support roller may be provided at the same time. Along with the movement of the blowing pipe, the inner sleeve and the outer sleeve which are connected with the blowing pipe and the air bag can move relatively, and friction is continuously generated between the inner sleeve and the outer sleeve. The support roller is arranged at the position, so that the sliding friction between the inner sleeve and the outer sleeve can be converted into rolling friction, the friction resistance between the sleeves is greatly reduced, the power consumption required by the traction of the movement of the sleeves is reduced, and the service life of the sleeves can be prolonged by weakening the friction resistance between the sleeves.

The outer supporting roller consists of rollers, shafts, bearings, supports and the like. The surface of the roller is axially concave arc, and the radius of the roller is the same as the outer diameter of the inner sleeve small pipe. The support is welded at the end part of the contact stress part of the straight section sleeved on the outer large pipe and the inner sleeve. If the support is a support, the support is welded on the uppermost part; if there are multiple supports, they may be symmetrically distributed at that location. The support is installed to ensure that only the roller is contacted with the outer surface of the small sleeve inside, and the large sleeve and the small sleeve are not contacted at the position and have certain gaps. The inner supporting roller and the outer supporting roller are similar in structure and installation position, and the difference is that the surface axial direction of the inner supporting roller is in a convex arc shape.

In the case of supporting rollers, the sleeves may still be provided with said hanging means to further reduce the frictional resistance between the sleeves.

Because the inner supporting roller is worn and needs to be replaced regularly, the appropriate position of the upper part of the straight section of the outer sleeve is provided with an access hole, and the maintenance and the overhaul of the inner supporting roller are convenient.

In at least one preferred embodiment of the utility model, the bag type dust collector dust cleaning device is provided with a wind-blocking cover plate which can cover at least one row of filter bag openings; is connected to the moving vehicle and/or the blowing pipe and moves along with the moving vehicle and/or the blowing pipe. After the blowing, the wind-blocking cover plate immediately falls on the filter bag opening covered by the wind-blocking cover plate, so that the pressure in the filter bag covering the filter bag opening is close to the same as the pressure outside the filter bag, and the dust just blown off from the periphery of the filter bag is ensured not to be sucked back to the outer surface of the filter bag by larger negative pressure and fall into the dust hopper, thereby solving the problem of secondary dust raising.

The most serious of the generated secondary dust is a row of filter bags to be sprayed, the next row of filter bags which are just sprayed, and the next row of filter bags which are just sprayed. Thus, the choke flap should cover at least one row of filter bags to be blown or simultaneously a newly blown or a next newly blown row of filter bags. Thus, the choke cover should be disposed to cover at least one or more rows. If jump spraying is adopted, the requirement on multiple rows of the wind-resistant cover plate is reduced, but the multiple rows still can play a certain role.

In at least one preferred embodiment of the present invention, the choke cover of the injection tube is opened with the same opening as the nozzle of the injection tube and is integrally connected to the injection tube. The nozzle may be cylindrical, conical, cubic, etc. and has one end connected to the blowing tube and the other end connected to the choke cover. The choke apron is fixed in on the jetting pipe nozzle like this, moves along with the jetting pipe, realizes solving the secondary raise dust problem to the choke of the filter pocket mouth of jetting mouth.

In order to save investment and reasonably utilize space, a row of filter bag openings on the side edge of the box body are generally closer to the side wall of the box body, and no larger space is provided. Therefore, when the choke cover plate is arranged to cover a plurality of rows of filter bag openings, in order to ensure that the injection pipe can move to the center of the outermost filter bag opening of the box body, the choke cover plate close to the outer side needs to be turned up, and therefore the stack plate can be arranged on the choke cover plate.

In at least one preferred embodiment of the present invention, the cover plate may be formed of at least one stack of plates, which are connected by a hinge; at least one set of guide rollers is arranged at the edge of the laminated plate close to the outer side, and each guide roller comprises a roller, a shaft, a bearing, a supporting seat and the like. The turning-over slide rail is arranged at the position corresponding to the guide roller, and the rail shape of the turning-over slide rail is arc-shaped or arc-like or linear shape which can give vertical upward component force to the guide roller. When the injection pipe drives the choke cover plate to move to the position close to the filter bag opening on one side of the box body, the guide rollers on the laminated plate arranged on the corresponding side of the choke cover plate move to the turnover slide rail, and the laminated plate is driven to turn up along with the upward movement of the slide rail due to the vertical upward component force given by the slide rail, so that the injection pipe can be ensured to smoothly move to the center of the filter bag opening on the outermost side.

The wind blocking cover plate and the blowing pipe are connected into a whole to block wind for the filter bag opening, secondary dust raising is prevented, the cover plate and the nozzle are connected into a whole, and therefore the effect of secondary drainage can be weakened, but the wind blocking device has the advantages that the structure is simple, and the operation is reliable. The wind-resistant cover plate is provided with at least one lifting roller, the lifting roller comprises a roller, a shaft, a bearing, a supporting seat and other structures, and the lifting roller is arranged on the vertical line or the vicinity of the gravity center of the wind-resistant cover plate. And a choke cover plate lifting track is arranged at a position corresponding to the lifting roller, and the track surface of the choke cover plate lifting track is vertical to the central line of the pattern plate hole. The rail surface of the lifting rail of the wind-resistant cover plate is convex and concave. The lifting roller moves on the convex-concave wind-resistant cover plate rail to drive the wind-resistant cover plate to ascend. The lifting roller and the track of the choke cover plate are arranged to lift the choke cover plate before the injection of the injection tube, so that the injection of a nozzle on the injection tube to the filter bag is not influenced on one hand, and the secondary drainage formed by the injection is not influenced on the other hand.

In at least one preferred embodiment of the utility model, at least one set of lifting guide rails is arranged on the wind-blocking cover plate, a door-shaped guide rail can be connected between two symmetrical lifting guide rails, and at least one set of lifting guide wheels are arranged on the blowing pipe relative to the lifting guide rails, wherein each lifting guide wheel comprises a roller, a shaft, a bearing, a supporting seat and the like. The lifting guide rail can also be arranged on the blowing pipe, and the lifting guide wheel is arranged on the wind-blocking cover plate.

Set up lifting guide and lift guide pulley, can connect choke apron and jetting pipe on the one hand: on one hand, in the ascending and descending processes of the wind-resistant cover plate, the lifting guide wheel rolls on the lifting guide rail, so that the ascending resistance of the wind-resistant cover plate is reduced; on the other hand, the lifting guide wheel and the lifting guide rail can limit the synchronous movement of the choke cover plate and the blowing pipe in the horizontal direction.

The choke cover can not fall down before the injection tube blows, so the choke cover needs to be hung on the injection tube, and along with the movement of the injection tube, the choke cover can fall down on the filter bag opening after the injection tube blows, so a hook system needs to be arranged and a falling system needs to be triggered.

Therefore, at least one air push pipe is arranged on the blowing pipe, a trigger push plate is arranged relative to the air push pipe, and the trigger power is pulse gas; the trigger pushing plate is provided with a hook, and the wind-blocking cover plate is provided with a corresponding hanging lug. The triggering pushing plate can be connected with a swing rod rotating around a fixed shaft on the blowing pipe, and can also be provided with a sliding block and a sliding block return spring or a sliding block return counter weight for connection, so that the resetting of the triggering pushing plate is realized after the triggering pushing process is finished.

When the lifting roller moves to the highest position of the track of the wind-resistant cover plate, the hanging lugs on the wind-resistant cover plate are just hung on the hooks of the trigger pushing plate, and then the wind-resistant cover plate is hung on the blowing pipe through the hook system and moves along with the blowing pipe. When the injection pipe reaches the center of the filter bag for pulse injection, the pulse airflow can simultaneously flow to the air push pipe to push the trigger push plate outside the air push pipe, the trigger push plate and the hook on the trigger push plate are stressed to move, the hook is separated from the hanging lug on the choke cover plate, and the choke cover plate falls above the injected filter bag opening under the action of gravity to perform choke work. The triggering pushing plate resets the counter weight through the arranged swing rod or the structures such as the slide block, the slide block reset spring and the like so as to return to the position of the orifice of the air pushing pipe again and wait for the next triggering operation. The trigger pushing plate can be provided with a sliding block and a sliding block return spring or a sliding block return counterweight, and the sliding block slides on a slide way arranged on the injection pipe; the triggering pushing plate can also be connected with a swing rod which rotates around a fixed shaft on the blowing pipe.

Because the choke apron needs to hang in the injection pipe below, consequently in order not to influence the injection pipe nozzle and to carrying out the jetting to the filter bag, just need set up the flap in the middle of the choke apron, can turn over the apron when the choke apron hangs on the injection pipe, expose the nozzle. Therefore, on the wind-blocking cover plate, the part of the gas which is sprayed into the filter bag from the gas nozzle of the blocking spraying pipe is arranged to be a turnover plate which can be turned over by adopting a hinge structure, and the hinge can be provided with a spring; and a pressure arm is arranged at the position of the other side of the hinge rotating shaft relative to the turning plate, a pressure lug is arranged on the pressure arm, and a pressure rod is arranged at the position of the injection pipe relative to the pressure lug. The choke cover plate is driven by the lifting roller to continuously rise, and when the choke cover plate rises to a certain height, the pressure rod on the injection pipe is contacted with the pressure lug on the choke cover plate. Along with the continuous lifting of the wind-resistant cover plate, the pressing rod can press the pressing lug downwards, the pressing lug is extruded to turn downwards, the pressing arm below the pressing lug also turns downwards, and the turning plate which is symmetrical to the pressing arm by taking the hinge as an axis can correspondingly turn upwards. When the wind blocking cover plate is hung on the blowing pipe, the turnover plate which is turned upwards can expose the nozzle on the blowing pipe.

The wind-blocking cover plate can also be provided with the front laminated plate structure, so that the space is reasonably utilized, and the investment is reduced. The cover plate can be composed of a plurality of foldable folding plates which are connected by hinges; at least the edge of the laminated plate close to the outside is provided with a guide roller, and a turnover slide rail is arranged relative to the guide roller.

In at least one preferred embodiment of the utility model, the connection means of the choke cover to the injection tube is at least one four-bar linkage, one end of which is connected to the injection tube and the other end of which is connected to the choke cover. The wind-blocking cover plate connected by the four-bar linkage mechanism is also provided with a front lifting roller and wind-blocking cover plate rail, a gas push pipe and trigger push plate, a hook and a hanging lug, and can also be provided with a stacking plate, a guide roller and a turnover slide rail. The blowing pipe is provided with an air push pipe and a trigger push plate which are triggered by pulse gas, and the trigger power is pulse gas; the trigger pushing plate is provided with a hook, and the wind-blocking cover plate is provided with a hanging lug opposite to the hook; the trigger pushing plate can be provided with a sliding block and a sliding block return spring or a sliding block return counterweight, and the sliding block slides on a slide way arranged on the injection pipe; the trigger pushing plate can also be connected with a swing rod which rotates around the fixed shaft on the blowing pipe; the cover plate is composed of a plurality of foldable plates which are connected by hinges; at least the edge of the laminated plate close to the outside is provided with a guide roller, and a turnover slide rail is arranged relative to the guide roller.

When the choke cover plate moves along with the movable injection pipe, the lifting rollers on the choke cover plate can drive the cover plate to ascend, and the four-bar mechanism pulls the choke cover plate to one side of the movable injection pipe under the action of pulling force. When the choke cover plate moves to the highest position, the choke cover plate is hung on the hook on one side of the blowing pipe through the hanging lug on the choke cover plate and moves along with the blowing pipe. When the blowing pipe carries out pulse blowing, the air current that pushes away the pipe spun through the gas pushes away triggers the catch bar and moves rather than last couple for the hangers on couple and the choke apron breaks away from, and the choke apron falls on the filter bag mouth that will cover by blowing pipe one side.

In at least one preferred embodiment of the utility model, in order to stop the filter bag from participating in the filtering operation when the individual filter bag is damaged and ash leaks, the technology is provided with a special bag opening cover (26).

In at least one preferred embodiment of the utility model, the bag-type dust collector dust cleaning device is provided with a bag-mouth cover (26) on the movable injection pipe device. As shown in figure 15, the top surface of the bag opening cover (26) is a plane, the shape of the plane is consistent with the shape of the outer edge of the bag opening protection disk with the head of the bag cage turned outwards, but the size of the plane is slightly larger. An apron board which is integrally cylindrical is arranged below the top surface of the bag opening cover along the shape edge of the top surface. The size of the top surface is at least larger than the size of the head protection disc of the bag cage plus the thickness of the skirt plate of the bag cage, and is at least smaller than the size of the head protection disc of the bag cage plus the distance between 4 adjacent protection discs; the height of the apron board of the bag opening cover is slightly larger than that of the protective disc at the head part of the bag cage, so that the bag opening cover can cover the protective disc at the head part of the bag cage integrally. The lower edge of the apron board, namely the edge contacted with the pattern board (14), is wrapped with filter material or other flexible sealing materials with certain thickness so as to eliminate the gap between the apron board and the surface of the pattern board and play a role in sealing. The bag mouth cover (26) is made of a material with higher density, such as steel, and aims to overcome the lifting force generated by the negative pressure of the filter bag when the filter bag filters gas by the self weight of the bag mouth cover.

In operation of the movable blowing tube, a bag flap (26) is placed on a bag flap carrier rigidly connected to the blowing tube. The bag mouth cover supporting plate and the blowing pipe wall connected with the bag mouth cover supporting plate form a groove structure together, the groove can enable the skirt plate on one side of the bag mouth cover to be abutted against the groove wall of the bag mouth cover supporting plate, and the other end of the skirt plate is obliquely abutted against the blowing pipe wall. The width of the groove is based on the condition that the bag opening cover on the groove does not fall off when the injection pipe runs. Preferably, on the groove wall of the bag mouth cover supporting plate, discontinuous bulges can be arranged at the corresponding positions of the centers of the bag mouth covers. The side of the protrusion adjacent to the bag port cover may be curved. Therefore, the bag opening cover is not only favorable for tipping and falling during working, but also saves the material of the supporting plate of the bag opening cover. Preferably, bag mouth cover supporting plates with the same length as the spraying pipe are arranged on the spraying pipe according to the length direction of the moving vehicle, bag mouth covers with the number equal to that of a row of filter bags are placed on the supporting plates, and bag mouth covers (26) are obliquely placed on the bag mouth cover supporting plates (25) along the moving vehicle in an aligned mode with the corresponding bag mouths.

When the bag opening cover does not work, the bag opening cover is placed and stopped on the bag opening cover supporting plate and moves along with the blowing pipe. Therefore, the bag opening cover can cover and seal the bag opening of the filter bag in the working moving range of any blowing pipe. When individual filter bags are damaged, the injection pipe can be moved to a proper position on the premise that the box body continues to work, and the corresponding bag opening covers are overturned by the bag opening cover overturning trigger devices to buckle the bag openings of the damaged filter bags. The bag opening can completely cover and buckle all components above the card and at the broken filter bag opening in a sealed space formed by the bag opening cover (26) and the card (14), so that the broken filter bag is off-line and does not participate in the filtering work, and other filter bags are not influenced and work as usual.

In at least one preferred embodiment of the utility model, the bag mouth cover tipping trigger device is provided with a buckle cover rod (27) and a buckle cover rod channel (32), the bag mouth cover supporting plate (25) is provided with the buckle cover rod channel (32), and a guide hole (31) for introducing the buckle cover rod (27) is formed in a corresponding position on the side wall of the air purification chamber. The arranged buckling cover rod (27) adopts a telescopic rod mode, and the end part of the buckling cover rod (27) extending into the buckling cover rod is provided with an elbow.

The cover buckling rod channel (32) is a channel which is surrounded by an inclined plate, a bag opening cover tray (25) and the side wall of the injection pipe, the inclined plate is arranged in a groove of the bag opening cover tray (25) and is connected to the bottom surface of the groove and the corresponding side wall of the injection pipe; the inclined plate is rigidly connected with the side wall at a certain angle. The angle between the inclined plate and the bottom surface of the groove of the bag opening cover tray and the angle between the inclined plate and the side wall of the blowing pipe are consistent with the angle of inclined leaning when the bag opening cover is parked, and the length of the inclined plate is consistent with that of the bag opening cover tray. When the bag opening cover is parked on the bag opening cover supporting plate, the upper surface of the top surface of the bag opening cover is attached to the upper surface of the inclined plate. The sloping plate is provided with a rectangular opening corresponding to the bag opening cover, so that the surface of the sloping plate is communicated with the cover-buckling rod channel (32). The length of the rectangular opening meets the requirement of rotary ejection of the elbow at the front end of the buckle cover rod (27), and the width is slightly larger than the diameter or width dimension of the elbow at the front end of the buckle cover rod (27). The position of the rectangular opening corresponds to the geometric center position of the bag mouth cover to be stopped, namely the position of the nozzle of the injection pipe.

The cover-fastening rod (27) is a special tool. In at least one preferred embodiment of the utility model, the buckle cover rod (27) adopts a telescopic rod mode, the handheld end is thickest, and the depth front end is thinnest. The maximum length of the air purifying chamber trolley needs to be more than the depth length of the air purifying chamber trolley in the length direction. The end of the cover-fastening rod (27) extending into the cover-fastening rod is provided with an elbow, and the size of the elbow is matched with the size of the cover-fastening rod channel and the rectangular opening on the cover-fastening rod channel. The bar body is provided with a mark for marking the number of the position of the bag mouth which is reached by the end of the buckle cover bar and aligning with the guide hole (31) when in use.

On one side wall of the air purifying chamber corresponding to the moving direction of the moving injection tube, a guide hole (31) for introducing a cover-buckling rod (27) is arranged at a cover-buckling rod channel position corresponding to the parking position of the injection tube when each row of filter bags need to buckle the cover of the bag. The guide hole may be of various shapes. The guide hole is provided with a hole cover capable of opening and closing the guide hole, and the hole cover can be a threaded plug, a flexible expansion plug, a cover capable of being opened and closed and other common forms. Preferably, the guide hole is sized to accommodate the elbow at the front end of the buckle rod. The smallest possible size of the guide hole is advantageous for the dimensional sealing effect of the sealing cover.

The operation method of the cover buckling process comprises the following steps: when the monitoring system finds and determines the position of a damaged filter bag needing to be offline, the moving vehicle is moved to a specific parking space needing to be provided with a bag opening cover (26), corresponding guide holes (31) in the box wall are manually opened, the elbow end of the buckling cover rod (27) penetrates into the guide holes (31), and the elbow is poked upwards into a buckling cover rod channel (32) in the bag opening cover supporting plate (25). The cover-buckling rod is gradually lengthened from the head until the corresponding position number on the rod body of the cover-buckling rod (27) is exposed, and then the mark aligned with the guide hole (31) on the cover-buckling rod is aligned with the guide hole, so that the end elbow of the cover-buckling rod just reaches the position of the bag opening cover (26) corresponding to the damaged filter bag. Twist buckle closure pole (27), the elbow is rotatory, and the elbow passes through the rectangle opening on the buckle closure pole passageway swash plate, promotes corresponding bag flap (26), makes it tumble, forms its one down along taking on damaging the sack that the filter bag is adjacent, and another down is still taken on the protruding state of sack lid layer board (25), then the jetting pipe dolly is followed the opposite side direction of bag flap (26) removes, makes this sack lid (26) drag and leans on to damaging on the bag cage head protecting disc of filter bag sack (13), and the another side of the bag flap of taking on the sack lid layer board is protruding breaks away from sack lid layer board gradually along protruding inboard cambered surface to it is last to drop the buckle closure.

The other bag mouth cover tipping triggering device is characterized in that a brake cable (28) is arranged on the bag type dust collector ash removing device; the brake cable (28) enters the box body from the outside of the box body, and a steel wire of a wire core of the brake cable (28) is connected with the bag opening cover (26) through a lever type mechanism. The brake cable (28) transmits the action to drive the bag opening cover to tip over from the bag opening cover supporting plate of the mobile vehicle and cover the bag opening.

In a further preferred embodiment of the utility model, unlike the first variant, this variant does not have a screw and screw channel, nor a guide hole. The position of the buckle cover rod channel inclined plate replaces the inclined plate, and a brake cable working end is arranged at the position of each bag opening cover (26) on the bag opening cover supporting plate (25). The working end is a lever type mechanism formed by hinging an inclined plate which can rotate along the shaft of the length direction of the blowing pipe and a support which is rigidly welded on the side wall of the blowing pipe. Under the natural state, the inclined plate is arranged under the action of the acting force and gravity of a torsion spring at the hinged part and keeps the inclined leaning angle when the bag opening cover is parked. The bottom of the inclined plate is connected with the brake cable core. Thus, the steel wire of the brake wire core drives the sloping plate of the lever type mechanism, and further pushes, drives or rotates the bag opening cover (26) to complete the turning action. The number of the working ends is consistent with that of the bag opening covers on the supporting cover plate, and the positions of the working ends are in one-to-one correspondence. Correspondingly, the same number of brake cables are connected with the brake cables.

All brake wires are combined into a strand of wire harness and led out of the air purification chamber box body, and the leading-out position of the brake wire harness is sealed and protected by a sealing cover (29). When the cover is buckled, the cover is buckled outside the box body by using a special mechanism or a tool at the other end of the brake cable with the corresponding serial number, and the action is transmitted into the box body by using the relative motion of the cable core and the cable pipe, so that the appointed bag opening cover (26) finishes the turning and buckling action.

The utility model also provides a bag type dust collector which is characterized by comprising any one of the bag type dust collector ash cleaning devices.

The utility model also provides a movable ash removal method of the bag type dust collector, which is characterized in that any one of the ash removal devices of the bag type dust collector is used, and the movable ash removal method comprises the following steps:

1) the injection tube is fixed on the moving vehicle or is a part of the vehicle body, the moving vehicle moves linearly and drives the injection tube to move, and the injection tube moves linearly to the position above any row of filter bag openings needing to be injected and is aligned with the filter bag openings one by one accurately;

2) the air bag outside the air purifying chamber is provided with a pulse valve, the air enters the air bag through an air inlet pipe of the air bag and enters an air outlet pipe of the air bag through an outlet of the pulse valve, and then sequentially enters the air conveying pipe, the blowing pipe and the nozzle of the air purifying chamber along the air outlet pipe of the air bag and is sprayed out through the nozzle; the pulse time of the back blowing gas rushing out from the gas bag is within 10-500 milliseconds, and the pressure of the gas in the gas bag before pulse blowing is 0.05-0.7 MPa;

3) and 2) gas sprayed out from the nozzle enters the filter bag through the filter bag opening, the bag body of the filter bag is expanded, part of the gas penetrates through the filter material of the filter bag and enters the filter chamber, accelerated shaking is generated on the surface of the expanded filter material of the filter bag, and dust on the outer surface of the filter bag is separated from the outer surface of the filter bag and is settled to a dust hopper under the pushing of the shaking and the gas which penetrates through the filter bag and enters the filter chamber, and is discharged through the dust hopper.

The utility model also provides a movable ash removal method of the bag type dust collector, which uses any one of the ash removal devices of the bag type dust collector and comprises the following steps:

1) the blowing pipe is fixed on the moving vehicle or is a part of the vehicle body, when the dust cleaning work is carried out, the control system gives a signal to the dragging mechanism, and the dragging mechanism rotates and drives the moving vehicle and the blowing pipe to move through the transmission mechanism. Through stop device on the locomotive, for example the rim, remove to the locomotive and carry on spacingly, make the locomotive carry out rectilinear movement under drag mechanism, drive mechanism's drive and stop device's spacing. The control system and the sensors control the stop position of the vehicle, the sensors are proximity switches or encoders, etc., so that the injection tube on the vehicle can stop at the center of each row of filter bag openings to be injected, and the nozzles on the injection tube correspond to the filter bag openings to be injected one by one.

2) The Roots blower is used for compressing external air or air after dust removal, the external air or the air is input into the air bag through the air bag air inlet pipe, and the air bag stops conveying after the pressure of the compressed air in the air bag reaches a certain pressure value, or the conveying is kept, but the air bag opens the pressure release valve. When the injection pipe moves to the position above the filter bag opening needing to be injected, and meanwhile, when the pressure of the air bag reaches the set working pressure, the pulse valve arranged on the air bag is opened, and the compressed air is acted by the pulse valve to form pressure pulse air which is discharged through the air outlet of the air bag. The pulse gas is discharged from the gas outlet of the gas bag, flows into the blowing pipe through the gas pipe and is sprayed out through the nozzle on the blowing pipe. The nozzle is right opposite to the mouth of the filter bag to be blown, and the pulse gas is sprayed into the mouth of the filter bag to be blown by the nozzle to realize pulse ash removal. The pulse time of the back blowing gas rushing out from the gas bag is within 10-500 milliseconds, and the pressure of the gas in the gas bag before pulse blowing is 0.05-0.7 Mpa.

3) And 2) allowing the pulse gas sprayed out from the nozzle to enter the filter bag through the filter bag opening, wherein the pulse gas expands the sprayed filter bag body, and part of the pulse gas penetrates through the filter material of the filter bag body and enters the filter chamber. The filter bag filter material expanded under the influence of the pulse gas shakes due to a large acceleration, and dust adsorbed on the outer surface of the filter bag is pushed by the shaking of the filter bag and the pulse gas penetrating through the filter bag body, is separated from the outer surface of the bag body, settles into the ash hopper and is finally discharged through the ash hopper.

In at least one preferred embodiment of the utility model, the moving ash removal method of the bag-type dust collector can add a choke cover plate in the step 2), and the choke cover plate moving synchronously with the moving vehicle is used for covering or approaching at least one row of filter bag openings just blown, so that the pressure in the filter bag covered on the filter bag openings is close to the same as the pressure outside the filter bag and is kept for a necessary period of time, then the filter bag leaves the blowing position and moves to the next blowing position with the moving vehicle, and the process is repeated.

The use method of the choke cover plate can enable the choke cover plate which is connected with the injection pipe into a whole to cover the mouth of the injected filter bag. The choke cover plate and the nozzle of the injection pipe are connected into a whole, the injection pipe moves to the opening of the filter bag to be injected, the corresponding choke cover plate covers the opening of the filter bag, after the injection pipe injects, the choke cover plate still covers at least one row of the openings of the filter bag after injection, so that the pressure in the corresponding row of the filter bag is gradually balanced with the pressure outside the filter bag, the row of the filter bag is in an off-line state, the dust cleaning operation is stopped, and the secondary dust raising phenomenon is effectively prevented.

Or the choke cover plate is connected with the blowing pipe through the lifting guide wheel and the lifting guide rail. When the injection pipe moves, the choke cover plate moves along with the horizontal movement of the injection pipe, and the lifting roller moves on the uneven choke cover plate rail to drive the choke cover plate to lift upwards. In the process that the choke cover plate rises, the pressure rod on the injection pipe presses the pressure lug on the choke cover plate, the pressure lug welded on the pressure arm drives the pressure arm to turn downwards together, the turning plate integrated with the pressure arm turns upwards, and the choke cover plate turns the turning plate in the middle part to expose the nozzle on the injection pipe while rising. The choke cover plate is lifted to the highest position, and the hanging lug on the choke cover plate can be hung on the hook of the blowing pipe. The choke plate then hangs on the injection tube and moves with the injection tube over the mouth of the filter bag to be injected. The pulse gas flows to the injection pipe, and when jetting is carried out to the filter bag through the nozzle, partial pulse gas is spout by the gas push pipe, and the promotion triggers the slurcam and removes, makes the couple that triggers on the slurcam remove, and couple and hangers break away from, causes the choke apron to drop on the injection pipe. The choke cover plate falls under the influence of gravity, the turning plate in the middle is reclosed under the influence of gravity and the spring force in the hinge, the closed choke cover plate covers the opening of the filter bag after the blowing is finished, so that the pressure in the corresponding filter bag is gradually balanced with the pressure outside the filter bag, the filter bag is in an off-line state, the dust cleaning operation is stopped, and the secondary dust raising phenomenon is effectively prevented.

Or the choke cover plate is connected with the blowing pipe through a four-bar mechanism. When the blowing pipe moves, the four-bar mechanism can pull the choke cover plate to move under the action of pulling force. When the choke cover plate moves horizontally along with the injection pipe, the lifting roller moves on the choke cover plate rail to drive the choke cover plate to lift upwards. The choke cover plate can move to one side of the injection pipe along with the movement of the injection pipe, when the choke cover plate moves to the highest position, the hanging lugs on the choke cover plate are hung on the hanging hooks of the injection pipe, and then the choke cover plate is hung on the injection pipe to move. The spraying pipe moves to the upper side of the mouth of the filter bag to be sprayed, the pulse gas flows to the spraying pipe, when the filter bag is sprayed through the nozzle, part of the pulse gas is sprayed through the gas pushing pipe to push the trigger pushing plate to move, so that the hook on the trigger pushing plate moves, the hook is separated from the hanging lug, and the wind blocking cover plate falls off from one side of the spraying pipe. The fallen wind-blocking cover plate is just covered on the filter bag opening which is just blown, so that the pressure in the corresponding row of filter bags is gradually balanced with the pressure outside the filter bags, the row of filter bags are in an off-line state, the dust cleaning operation is stopped, and the secondary dust raising phenomenon is effectively prevented.

After covering at least one row of filter bag openings which are just blown for a period of time, the choke cover plates in the above forms leave the position along with the movement of the blowing pipe, and the covering work of other filter bag openings is carried out. The period of time is at least 2s, more preferably, the period of time is 5s, 6s, 7s, 8s, 9s, 10s, 15s, 20s, 30s, 40s, 50s, 60s, 70s, 80s, 90s, 100s, 150s, 200s, 300s, 600s, or a range consisting of any two of the foregoing.

It should be noted that the present invention has been described in detail only for the improvement of the present invention, and the same portions as the prior art will not be discussed in detail. The prior art can be adopted for the parts of the utility model which are not described in detail. For example, the rotary joint, the pulse valve, the turnover slide rail, the control system, the sensor and the like mentioned in the utility model can all adopt the prior art. When the device in the prior art has various structures, those skilled in the art can select the device according to the knowledge and practical needs in the field without affecting the achievement of the object of the present invention.

After the bag type dust collector uses the dust removing device, the following advantages can be brought: in the aspect of ash removal effect, the ash removal device has higher ash removal capability than the prior art, and is suitable for customers under more harsh ash removal working conditions; compared with other existing pulse back-blowing technologies, the service life of the filter bag can be prolonged; in terms of space occupation, the space occupation is only two thirds of the space occupation of the prior art; especially in the aspect of saving investment, the section of the filter bag can be in a small, flat or folded bag shape because the integral box body is not required to be taken off line; the effective utilization of the corners of the box body increases the dust removal area of the unit box body by 70 percent, and can reduce the equipment investment by more than 20 percent under the same dust removal efficiency.

Drawings

Figure 1 is a schematic view of a blowing device of a pulse moving vehicle.

FIG. 2 is a schematic view of a hose.

Fig. 3 is a schematic view of fig. 1 taken along direction a.

FIG. 4 is a front view of the carriage, the blowing tube and the choke cover.

FIG. 5 is a side view of the lift roller, choke plate track.

FIG. 6 is a top view of the choke plate and the choke plate track.

FIG. 7 is a schematic sectional view taken along line A-A of FIG. 4.

Fig. 8 is a left schematic view of the folding plate and the folding slide rail.

Fig. 9 is a schematic top view of the plate stacking and folding slide rail.

Fig. 10 is a schematic view of the structure of the blowing pipe and the choke cover.

FIG. 11 is a schematic sectional view taken along line A-A of FIG. 10.

FIG. 12 is a schematic partial cross-sectional view of the flap opened.

FIG. 13 is a front view of a four bar linkage attachment choke cover.

FIG. 14 is a schematic sectional view taken along line A-A of FIG. 13.

Fig. 15 is a schematic view of the inner and outer support rollers.

FIG. 16 is a schematic view of the combination of pocket flap trays, pocket flap, flap rods, guide holes, and flap rod channels.

FIG. 17 is a schematic view of the combination of a brake cable, a bag opening cover supporting plate, a bag opening cover, a brake cable sealing clamp and a sealing cover.

Wherein: 1-pulse valve, 2-air bag, 3-air purifying chamber top plate, 5-air pipe, 6-blowing pipe, 7-track, 8-baffle wheel, 9-nozzle, 10-synchronizing shaft, 11-fixed pulley or fixed gear wheel, 12-driving pulley or driving gear wheel, 13-filter bag mouth, 14-pattern plate, 15-air purifying chamber side plate, 16-speed reducer, 17-motor, 18-steel wire rope or chain, 19-flange, 20-air conveying hose, 21-moving vehicle wheel, 22-filter bag, 23-swing arm, 24-cover rod channel baffle, 25-bag mouth cover supporting plate, 26-bag mouth cover, 27-cover rod, 28-brake wire, 29-sealing cover, 30-brake wire clamp and 31-guide hole, 32-buckle cover rod channel, 33-lever mechanism, 34-air bag air inlet pipe, 35-wind blocking cover plate, 36-lifting guide rail, 37-lifting guide wheel, 38-hanging lug, 39-hanging hook, 40-hanging hook bracket, 41-air push pipe, 42-pressure rod, 43-pressure lug, 44-turning plate, 45-lifting roller, 46-wind blocking cover plate track, 47-supporting frame, 48-folding plate, 49-guide roller, 50-folding slide rail, 51-outer sleeve, 52-lower rotary joint, 53-inner supporting roller, 54-outer supporting roller, 55-inner sleeve, 56-upper rotary joint, 57-four-bar linkage mechanism, 58-trigger push plate, 59-hinge, 60-pressure arm and 61-hinge.

Detailed Description

The following examples are further illustrative of the present invention, but the present invention is not limited thereto.

Example 1

As shown in fig. 1, the air-purifying chamber side plate 15, the flower plate 14, and the air-purifying chamber top plate 3 together constitute an air-purifying chamber of the bag-type dust collector. And the gas bag 2 is arranged outside the top surface of the gas purifying chamber and fixed on the top plate 3 of the gas purifying chamber and a structural beam thereof and is connected with the Roots blower through a gas bag inlet pipe 34. The air bag 2 is provided with a pulse valve 1, a pipeline connected with an outlet of the pulse valve 1 passes through the top plate 3 and enters the air purifying chamber to change into a horizontal direction, and the horizontal section is connected with a rotary joint 56 and then is connected with an air conveying pipe 5. The gas transmission pipe 5 is a telescopic pipe which is sleeved by a large pipe and a small pipe in a movable fit manner. The lower sleeve of the gas pipe is connected with a rotary joint 52 which is connected with the end part of the injection tube 6, the bottom of the injection tube 6 is provided with nozzles which have the same number and the same distance with a row of filter bags covered by the injection tube, and the centers of the nozzles correspond to the centers of the covered filter bags one by one. Two rails 7 are arranged in parallel on two sides of the air purifying chamber in the direction perpendicular to the length direction of the blowing pipe, the blowing pipe 6 is arranged on the moving vehicle, and wheels 21 are arranged. And blocking wheels or blocks 8 (shown in figure 3) are arranged on two sides of the track on the air inlet side of the lower part of the blowing pipe 6. So that the wheel 21 does not need to be provided with a rim. The other rail is a free end, and if the weight of the car can not overcome the counterforce of blowing, a balance weight can be loaded, or a side convex edge is arranged on the rail, and a catch wheel or a stop block for preventing the blowing tube trolley from moving up and down is arranged below the side convex edge.

In order to drag the blowing pipe trolley to horizontally and linearly reciprocate to the upper part of each row of oval filter bag openings 23, the parts of the two ends of the trolley body close to the track and the lower rotary joint 52 of the blowing pipe end are fixedly connected with three chains 18. The chains are all arranged to extend in the orbital direction to the plenum side wall 15 (the face thrown away in fig. 1), instead extending vertically upwards by the passive roller 11 attached thereto. After the chain is turned by the driven roller cone 11, the chain passes through the driving roller cone 12 on the driven roller cone, and then passes through two other driven roller cones 11 (four roller cones of one chain are arranged in a rectangle when viewed from the side wall 15 of the air purifying chamber) and finally is fixed at two ends of the other long side wall (the reverse side corresponding to the side wall of the fixed chain 18) of the blowing trolley, so that two closed and space-parallel transmission chains are formed (as shown in fig. 3). The link between the chain 18 and the trolley and the swivel joint should have a retraction mechanism to tighten the chain and at the same time have the function of allowing the chain and the fixed surface to rotate freely in the plane of the rail direction. As shown in fig. 1, the driving cone 12 is provided on the synchronizing shaft 10 to ensure synchronous rotation. The driving cone synchronous shaft 10 passes through a gas purifying chamber side plate 15 through a sealing bearing and is connected with a speed reducer 16 and a motor 17 which are arranged outside the dust remover box body.

As shown in fig. 16, a bag mouth cover supporting plate 25 is arranged at the bottom of one long side wall (or two long side walls if necessary) of the blowing trolley, and the supporting plate simultaneously plays a role of a choke baffle, that is, when the blowing trolley pulse deashes a certain row of filter bags, the bag mouth cover supporting plate covers the last row of filter bags that have been deashed, so that the deashed dust cannot be adsorbed on the filter bags that have been deashed immediately, and the dust can fall into the dust hopper. And a cover buckling rod channel partition plate 24 is arranged above the bag opening cover supporting plate 25, and the partition plate 24 and the long side wall of the blowing trolley form a cover buckling rod channel 32. At the same time, the cover-fastening rod channel partition 24 has the function of supporting the bag opening cover 26, so that the bag opening cover moves along with the blowing trolley in a designed posture. The cover rod channel partition board is provided with an opening or a channel reserved by a plurality of cover rod channel partition boards 24 corresponding to the gravity center of the bag opening cover. The bag mouth cover supporting plate 25 is provided with a small section of bulge at the position corresponding to the bag mouth cover, and the bag mouth cover side of the protruding structure is a cambered surface with a sharp upper end and a thick lower end.

When the blowing trolley works, due to the arrangement of the upper rotary joint 56, the lower rotary joint 57 and the telescopic sleeve 5 at the two ends of the gas conveying pipe, the blowing trolley is driven by the motor 17 to make reciprocating linear motion on the track 7 through the speed reducer 16, the driving cone 12 and the chain 18, and the movable blowing trolley similar to a travelling crane in a factory building is formed. Such an injection tube allows for a plurality of positions of the filter bag to be reached with the injection trolley. The moving position is set by corresponding sensors and a PLC control system according to requirements. The pulse time may be selected to be within 200 milliseconds. The pressure of the gas in the gas bag before pulse blowing is 0.085 MPa.

After the monitoring system finds and determines the position of the filter bag which needs to be offline in a damaged state, as shown in fig. 16, the blowing pipe trolley is moved to a specific parking space for applying the bag opening cover 26, the corresponding guide hole 31 on the box wall 15 is manually opened, the elbow end of the buckle cover rod 27 is inserted into the guide hole 31, the elbow of the buckle cover rod is inserted upwards into a buckle cover rod channel 32 formed by the bag opening cover supporting plate 25, the buckle cover rod channel partition plate 24 and the side wall of the trolley, and the position of the bag opening cover 26 corresponding to the damaged filter bag is determined by the elbow of the end of the buckle cover rod 27 according to the position number on the rod body of the buckle cover rod. The cover-fastening rod 27 is twisted to rotationally push the bag opening cover 26 to tip by the elbow, a state that one lower edge is lapped on the adjacent bag opening of the damaged filter bag and the other lower edge is still lapped on the bag opening cover supporting plate 25 is formed, then the injection pipe trolley moves along the opposite side direction of the bag opening cover 26, and the bag opening cover 26 is dragged to the bag opening of the damaged filter bag and finally drops to be covered on the damaged bag opening due to the effect that the interval small-section bulge on the bag opening cover supporting plate 25 and the bag opening cover side are cambered surfaces with sharp upper ends and thick lower ends.

Example 2

As shown in FIG. 2, different from the first embodiment, the pipeline connected with the outlet of the pulse valve 1 passes through the top plate 3 and enters the air purifying chamber, and then is connected with a flange 19 at one end of a flexible air hose 20. The other flange 19 of the gas hose 20 is connected with the end of the injection tube 6, and pulse gas is introduced into the injection tube 6 and is injected into the bag mouth 23 of the oval-like filter bag through the nozzle 9 so as to remove dust on the outer surface of the filter bag 22.

Another difference from the first embodiment is that, as shown in FIG. 17, a brake cable working end is provided above the pocket cover pallet 25, and the working end is a lever mechanism 33 driven by a steel wire of a brake cable core and held in a fixed posture as shown in the figure by spring force. When the operation end of the brake cable 28 is operated, the action is transmitted to the box body by utilizing the relative movement of the cable core and the cable tube, so that the appointed lever type mechanism 33 overcomes the spring force to complete the turning-over action, and finally the corresponding bag opening cover 26 is turned down to the supporting cover plate 25. All the brake wires 28 are combined into a strand of wire bundle and led out of the air purification chamber box body, and the brake wire bundle is led out of the dust remover box body through a brake wire sealing clamp 30 and a sealing cover 29.

When the monitoring system finds and determines the position of a damaged filter bag needing to be offline, the injection tube trolley is moved to a specific parking space for applying a bag opening cover 26, a special mechanism or tool at one end outside the box body of a brake cable 28 is utilized to carry out cover buckling operation outside the box body, so that the corresponding bag opening cover 26 is overturned to form a state that one lower edge is lapped on the adjacent bag opening of the damaged filter bag and the other lower edge is still lapped on a bag opening cover supporting plate 25, and then the injection tube trolley moves along the opposite side direction of the bag opening cover 26 to drag the bag opening cover 26 to the damaged bag opening of the filter bag and finally drops and buckles the damaged bag opening cover.

Example 3

On the basis of fig. 1, a choke baffle is also arranged on the injection pipe.

Fig. 4 is a schematic view of one side of the choke cover 35 connected to the blowing pipe 6, and the other side is connected in the same manner as the side.

As shown in fig. 4, the choke cover 35 is provided with a lifting guide rail 36, the blowing pipe 6 is provided with a cover lifting guide wheel 37, the lifting guide rail 36 moves up and down outside the cover lifting guide wheel 37, and the choke cover 35 and the blowing pipe 6 are connected by a connecting device consisting of the lifting guide rail 36 and the cover lifting guide wheel 37. The two sides of the choke cover 35 are provided with lifting rollers 45, the lifting rollers 45 move on a choke cover rail 46 (see fig. 5), and the contact surface of the lifting rollers 45 and the choke cover rail 46 is in a wave shape. When the blowing pipe 6 moves on the pattern plate plane, the choke cover 35 also moves transversely along with the moving blowing pipe 6 under the limit of the lifting guide rail 36 and the lifting guide wheel 37. Due to the wave-shaped contact surface of the choke plate rail 46, the choke plate 35, which is rigidly connected to the lift roller 45, moves up and down relative to the injection tube 6 under the action of the wave-shaped contact surface.

The wind-blocking cover plate 35 is provided with a hanging lug 38, the blowing pipe 6 is provided with a hook 39, a hook support 40 and a hook air push pipe 41, the hook 39 is provided with a trigger push plate 58 matched with the air push pipe 41, and the functions of hanging and falling of the cover plate are realized through the part. The middle part of the cover plate is provided with a nozzle hole door (as shown in figures 6 and 12), and the two turning plates 44 are connected with the wind-resistant cover plate 35 through hinges 61. And a torsion spring is further arranged on the hinge, so that the turning plate is kept closed in a natural state and a negative pressure state of the dust remover. The movable blowing pipe 6 is provided with a pressure lever 42, the turning plate 44 is provided with a pressure lug 43 corresponding to the position of the pressure lever 42, the pressure lug 43 is connected to a pressure arm 60 integrated with the turning plate 44 at the lower part, the pressure lever 42 and the pressure lug 43 together form a transmission trigger mechanism (as shown in figure 12) of the nozzle hole door, and the turning and closing movement of the turning plate 44 is realized through a torsion spring on hinges of the pressure lever 42, the pressure lug 43 and the turning plate 44.

The wind-blocking cover plate is composed of three cover plates and covers three rows of filter bags (a row to be cleaned, a row to be cleaned before and after the row and a row to be cleaned just after the row is cleaned). The middle cover plate is connected to the lifting rail 36 and is provided with a nozzle opening door, and the cover plates on both sides are hinged to the middle cover plate by hinges 59 to form a foldable plate 48. The outer side of the front end of the stack 48 is provided with a guide roller 49 (as shown in fig. 8 and 9). A folding slide rail 50 is arranged on the wall of the air purifying chamber in the direction parallel to the blowing pipe 6 and at the position corresponding to the guide roller 49.

When the blowing pipe 6 moves along the pattern plane, the choke cover 35 moves along with the blowing pipe 6 and rises relative to the blowing pipe 6 under the limit of the gate-shaped cover lifting guide rail 36 and the cover lifting guide wheel 37 by the combined action of the lifting rollers 45 rigidly connected with the choke cover 35 and the wave-shaped contact surface of the choke cover rail 46. During the lifting process of the choke cover 35, the pressing lug 43 will be pressed against the pressing rod 42, and under the pressing action of the pressing rod, the pressing lug moves downwards, the turning plate 44 connected with the pressing lug 43 through the pressing arm 60 will be opened, and the nozzle hole door is opened, so that the nozzle 9 on the blowing pipe 6 can be exposed. When the lift roller 45 moves to the highest position of the choke plate rail 46, the choke plate 35 rises to the highest height, and the hanging lug 38 on the choke plate hangs on the hanging hook 39 of the blowing pipe 6. When the movement is continued, the choke cover 35 is connected to the hook 39 via the hook 38 and hung on the blowing pipe 6, and therefore the lift roller 45 is separated from the rail 46 and hung on the blowing pipe 6 to move. When the injection tube 6 moves to the position above the filter bag opening 13, the movement is stopped, pulse deashing is carried out under the control of the pulse valve 1, high-pressure gas passes through the injection tube 6 and is sprayed out from the nozzle 9, and the pulse deashing work is finished. When blowing is carried out, high-pressure air flow is also sprayed out from the air push pipe 41 to push the trigger push plate 58 rigidly connected with the hook 39, the hook 39 is pushed to move backwards under the action of the high-pressure air flow, so that the hanging lug 38 is separated from the hook 39, and the cover plate falls down on the support frame 47 under the action of gravity. When falling, the pressure lever 42 and the pressure lug 43 are disengaged, and the flap 44 is closed again under the influence of the torsion spring and the self-gravity. When the cover plate falls onto the support frame 47, the three filter pocket mouths 13 are covered, so that the cover plate can be covered. After the filter bag opening 13 is sealed by the cover plate 35 for a period of time, the dust cleaning and sealing operation of the next row of bag openings is continued along with the movement of the injection pipe 6 away from the filter bag opening 13.

When the injection tube 6 and the wind-blocking cover plate 35 move to one end of the box body, the folding plate 48 falls on the turnover sliding rail 50, along with the movement of the injection tube 6, the folding plate 48 turns over along the turnover sliding rail 50, and when the injection tube 6 moves to the position above the filter bag opening 13 on the outermost row, the folding plate 48 just falls on the side wall of the box body. The movable blowing pipe 6 is stopped, reversely moved when waiting for next ash removal, and the process is repeated and repeated to realize the ash removal process

The working method of the ash cleaning system comprises the following steps:

step one, after the dust remover works continuously for a period of time, a thicker powder cake layer is accumulated on the surface of the filter bag, so that the pressure of the system is increased to the ash removal threshold value. And the dust remover control system receives a threshold pressure signal of the system pressure relay and starts the working period of the dust cleaning system. Firstly, the Roots blower works, the air bag 2 is inflated and pressurized through the air bag air inlet pipe 34, when the set working pressure reaches 0.85 kilogram, the pressure release valve of the air bag 2 is opened, and the air bag 2 maintains the pressure to wait for the pulse valve 1 to work. And meanwhile, the motor 17 is started, the blowing pipe 6 fixed on the moving vehicle is driven through the speed reducer 16, the synchronizing shaft 10, the driving cone 12 and the chain 18, the moving vehicle moves linearly and drives the blowing pipe 6 to move, and the moving distance of the moving vehicle is controlled through the encoder arranged on the synchronizing shaft 10 until the moving vehicle stops after being in one-to-one accurate correspondence with the filter bag mouths 13 below.

In the process that the moving vehicle drives the blowing pipe 6 to move, the choke cover 35 is enabled to ascend relative to the blowing pipe 6 while moving along with the blowing pipe 6 under the limit of the door-shaped cover lifting guide rail 36 and the cover lifting guide wheel 37 through the combined action of the lifting rollers 45 rigidly connected with the choke cover 35 and the wave-shaped contact surface of the choke cover rail 46. During the lifting process of the choke cover 35, the pressing lug 43 will be pressed against the pressing rod 42, and under the pressing action of the pressing rod, the pressing lug moves downwards, the turning plate 44 connected with the pressing lug 43 through the pressing arm 60 will be opened, and the nozzle hole door is opened, so that the nozzle 9 on the blowing pipe 6 can be exposed.

And step two, when the moving vehicle reaches a preset position, namely the encoder signal reaches a set value, and the working pressure of the air bag reaches the set pressure of 0.85 kilogram, namely the air bag pressure relay sends a signal, the dust remover control system sends an instruction, and the pulse valve 1 works. The pressure gas in the gas bag 2 enters the gas outlet pipe of the gas bag 2 through the outlet of the pulse valve 1, and then sequentially enters the gas pipe 5, the blowing pipe 6 and the nozzle 9 of the air purifying chamber along the gas outlet pipe of the gas bag 2 and is sprayed out through the nozzle 9. The pulse width of the blow-back gas from the gas bag 2 was 200 milliseconds.

When the nozzle 9 blows, high-pressure air flow is sprayed out through the air push pipe 41, the trigger push plate 58 rigidly connected with the hook 39 is pushed, the hook 39 moves backwards under the action of the high-pressure air flow, so that the hanging lug 38 is separated from the hook 39, and the cover plate falls downwards on the support frame 47 under the action of gravity. When falling, the pressure lever 42 and the pressure lug 43 are disengaged, and the flap 44 is closed again under the influence of the torsion spring and the self-gravity. When the cover plate falls onto the support frame 47, the three filter pocket mouths 13 are covered, so that the cover plate can be covered. After the row of filter bags is cleaned for 15 seconds, the choke plate 35 moves forward along with the injection pipe 6 and is lifted at the same time to leave the filter bag opening 13. Within said 15 seconds, the trolley remains stationary and, correspondingly, the choke flap which has fallen is also held in the choke operating position. Therefore, three rows of filter bags below the cover plate are in an off-line state and do not participate in filtering work, and secondary dust raising caused by the filter bags is avoided. At the crest of the passage through the choke plate track 46, it is re-suspended from the hook 39 in preparation for choke work at the next blow.

And 3, high-pressure gas sprayed out through the nozzle 9 enters the filter bag through a filter bag opening, the bag body of the filter bag is expanded, part of the high-pressure gas penetrates through the filter material of the filter bag and enters a dust chamber, the surface of the expanded filter material of the filter bag generates greatly accelerated shaking, dust on the outer surface of the filter bag is separated from the outer surface of the filter bag and is settled to a dust hopper under the pushing of the shaking and the gas penetrating through the filter bag and entering the dust chamber, the dust is discharged through the dust hopper, and the steps are repeated in such a circulating way until all the dust in the whole box is removed.

Example 4

This embodiment is another form of a choke plate, and the main structure is the same as embodiment 3, and the difference between this embodiment and embodiment 3 is that: 1. only one side of the blowing pipe is provided with a hook and a corresponding blowing opening. 2. When the cover plate is lifted, the cover plate can be hung on one side of the blowing pipe. 3. The cover plate has no flap and folded plate. 4. The choke cover track is not a wave-shaped track but a single-sided sawtooth track.

As shown in fig. 13, a hook 39 and an air push pipe 41 are provided on one side of the blowing pipe 6, a corresponding hook 38 is provided on the choke cover 35, and two hook grooves are provided on the hook 38, thereby realizing the hanging function of the choke cover 35. The blowing pipe 6 is connected to the choke cover 35 via a link mechanism 57. And lifting rollers 45 are arranged on two sides of the choke cover plate 35, and the lifting rollers 45 move on a choke cover plate rail 46 below the lifting rollers to drive the choke cover plate 35 to move upwards.

When the blowing pipe 6 moves, the link mechanism 57 moves the choke cover 35 in the same direction. The lift rollers 45 on either side of the choke plate 35 move on the choke plate rails 46, which move the choke plate 35 upward. When the lift roller 45 moves to the top of the choke plate track 46, the hanger 38 on the choke plate 35 hangs just above the lower hook slot of the hanger 39. The movement of the blowing tube 6 continues with the lift roller 45 clear of the top of the choke plate track 46, at which point the choke plate 35 is suspended from the hook 39, on the side of the blowing tube 6, and moves with the blowing tube 6. When the movable blowing pipe 6 moves to the central position of the filter bag opening 13, pulse dust cleaning is carried out, and simultaneously, high-pressure airflow blows the hook 39 away through the air pushing pipe 41. At this time, the lug 38 is separated from the hook 39, and the choke cover 35 falls down by gravity and falls over the filter bag mouth 13 on the side of the injection tube 6 to choke. After a period of time, the choke cover 35 moves away from the filter bag mouth 13 along with the blowing pipe 6, and is hung on the hook 39 again for the next choke work.

The last section of the saw teeth of the choke cover rail 46 are higher than the other saw teeth, when the blowing pipe 6 finishes the dust cleaning work of the last row of bag mouths, the roller on the choke cover 35 moves to the last section of the saw teeth of the choke cover rail 46. The hanging lug 38 of the wind-proof cover plate 35 is just hung on the upper hook groove of the hanging hook 39. The choke cover plate 35 is hung on one side of the blowing pipe 6 and moves back to the initial position to wait for the next round of ash removal and choke work.

Example 4

As shown in fig. 15, one end of the outer sleeve 51 is welded to the top port of the lower swivel 52 and the bottom port of the lower swivel 52 is welded to the intake port of the moving blowing tube. The outer diameter of the inner sleeve 55 is slightly smaller than the inner diameter of the outer sleeve 51, one end of the inner sleeve 55 is welded to the bottom interface of the upper rotary joint 56, and the top interface of the upper rotary joint 56 is welded to the air outlet of the air bag. The other end of the outer sleeve 51 is sleeved outside the other end of the inner sleeve 55. The upper part of the end head of the outer sleeve 51 is provided with an outer supporting roller 54 at the position which rubs with the top of the outer wall of the inner sleeve 55, the bottom edge of the outer supporting roller 54 is lower than the height of the inner wall of the outer sleeve 51, the axial section of the outer supporting roller 54 is a symmetrical circular arc line which is concave towards the axis, and the circular arc line is inosculated with the outer wall of the inner sleeve 55. An inner support roller 53 is arranged at the friction part of the lower end of the inner sleeve 55 and the bottom of the inner wall of the outer sleeve 51, the bottom edge of the inner support roller 53 is lower than the height of the outer wall of the inner sleeve 55, the axial tangent plane of the inner support roller 53 is a symmetrical arc line protruding from the axis, and the arc line is matched with the inner wall of the outer sleeve 51. Thus, the upper portion of the outer tube 51 is in contact with the top outer wall of the inner tube 55 by the outer support rollers 54, and the lower portion of the inner tube 55 is in contact with the lower inner wall of the outer tube 51 by the inner support rollers 53. When the trolley runs, the position of the air bag is unchanged, and the trolley keeps a posture vertical to the track to run along the track under the traction force and the limiting action of the wheel rim. At this time, the lower rotary joint 52 and the upper rotary joint 56 rotate, the outer sleeve 51 and the inner sleeve 55 generate telescopic relative displacement, and the sliding friction between the outer sleeve 51 and the inner sleeve 55 is changed into rolling friction by the device, so that the friction force between the outer sleeve 51 and the inner sleeve 55 is greatly reduced.

Claims (20)

1. A bag type dust collector ash removal device comprises a moving vehicle, an injection pipe and an air bag; the method is characterized in that:

the movable vehicle is provided with the blowing pipe which is fixed on the movable vehicle or is a part of the vehicle body, and the blowing pipe is movable;

the air bag is provided with a pulse valve;

the pulse valve on the air bag is connected with the injection pipe through the air pipe, one end of the air pipe close to the pulse valve of the air bag is not displaced, and one end close to the injection pipe is displaced along with the injection pipe;

the injection pipe is provided with a plurality of nozzles at least covering one row of filter bag openings;

the bag type dust collector ash removal device is provided with a choke cover plate, and at least one row of filter bag openings can be covered; the choke cover plate is connected to the moving vehicle and/or the blowing pipe and moves along with the moving vehicle and/or the blowing pipe;

the lifting roller of the choke cover plate is arranged on the choke cover plate, the choke cover plate lifting rail is arranged opposite to the lifting roller, and the choke cover plate lifting rail is convex and concave.

2. The bag house ash removal device of claim 1, wherein: the blowing pipe moves linearly along with the moving vehicle;

the moving vehicle is drawn by at least one set of transmission mechanism and dragging mechanism; the dragging mechanism is a motor or an electric motor, and the motor is a pneumatic motor or a hydraulic motor; the transmission device is one of the following devices: the transmission of gears and racks, the transmission of rails and wheels, the transmission of ropes and pulleys, and the transmission of chains and chain wheels;

when the transmission mechanism is the transmission between a rail and a wheel, the transmission between a rope and a pulley, or the transmission between a chain and a chain wheel, at least one movable vehicle track is arranged; the moving vehicle is provided with or not provided with a limiting device which is a catch wheel or a wheel rim.

3. The bag house ash removal device of claim 2, wherein: the blowing pipe is horizontally arranged above the pattern plate and moves in a reciprocating manner horizontally and linearly.

4. The bag house ash removal device of claim 2, wherein: the air delivery pipe is a hose or a sleeve.

5. The bag house ash removal device of claim 4, wherein: the two ends of the gas pipe are provided with rotary joints.

6. The ash removal device of a bag-type dust collector as claimed in claim 4, wherein the sleeve is a two-section or three-section sleeve with a middle part being a large pipe and a small pipe which are overlapped and sleeved with each other; the gas pipe is provided with a hanging mechanism which is in a spring form or a lifting heavy hammer form.

7. The ash removing device of a bag-type dust collector as claimed in claim 6, wherein at least one outer support roller and/or at least one outer support roller is arranged at the contact force part of the end part of the straight section of the outer sleeve of the sleeve and the inner sleeve

At least one inner supporting roller is arranged at the contact stress part of the straight section end of the inner sleeve and the outer sleeve;

the gas pipe is provided with a hanging mechanism which is in a spring form or a lifting heavy hammer form.

8. The baghouse ash removal device of claim 7, wherein a manhole is provided at an upper portion of the straight section of the outer sleeve.

9. The ash removal device for the bag type dust collector as claimed in claim 1, wherein the choke cover plate of the blowing pipe is provided with the same opening as the nozzle of the blowing pipe and is connected with the nozzle of the blowing pipe into a whole; the wind-blocking cover plate is formed by at least one foldable folding plate, and the folding plates are connected by a hinge; at least the edge of the laminated plate close to the outside is provided with a guide roller, and a turnover slide rail is arranged relative to the guide roller.

10. The bag house ash removal device of claim 1, wherein: the choke cover plate is provided with a lifting guide rail, and the blowing pipe is provided with a lifting guide wheel; or the choke cover plate is provided with a lifting guide wheel through a bracket, and the blowing pipe is provided with a lifting guide rail.

11. The baghouse ash removal device of claim 10, wherein: the blowing pipe is provided with an air push pipe and a trigger push plate which are triggered by pulse gas, and the trigger power is pulse gas; the trigger pushing plate is provided with a hook, and the wind-blocking cover plate is provided with a hanging lug opposite to the hook; the trigger pushing plate can be provided with a sliding block and a sliding block return spring or a sliding block return counterweight, and the sliding block slides on a slide way arranged on the injection pipe; the triggering pushing plate is connected with a swing rod which rotates around a fixed shaft on the blowing pipe.

12. The bag house dust collector ash removal device of claim 11, wherein: on the choke cover plate, the part for blocking the gas injection port of the injection pipe from being injected into the gas in the filter bag is arranged into a turnover plate which can be turned over by adopting a hinge structure, and the hinge is provided with a spring; a pressure arm is arranged at the other side position relative to the turning plate by taking the hinge rotating shaft as a reference, a pressure lug is arranged on the pressure arm, and a pressure rod is arranged at the position, relative to the pressure lug, on the injection pipe; the cover plate can be composed of a plurality of foldable folding plates which are connected by hinges;

at least the edge of the laminated plate close to the outside is provided with a guide roller, and a turnover slide rail is arranged relative to the guide roller.

13. The bag house ash removal device of claim 1, wherein: the connecting device of the choke cover plate and the injection pipe is a four-bar mechanism, one end of the four-bar mechanism is connected with one side of the injection pipe, and the other end of the four-bar mechanism is connected with the choke cover plate; the blowing pipe is provided with an air push pipe and a trigger push plate which are triggered by pulse gas, and the trigger power is pulse gas; the trigger pushing plate is provided with a hook, and the wind-blocking cover plate is provided with a hanging lug opposite to the hook; the trigger pushing plate can be provided with a sliding block and a sliding block return spring or a sliding block return counterweight, and the sliding block slides on a slide way arranged on the injection pipe; the trigger pushing plate can also be connected with a swing rod which rotates around the fixed shaft on the blowing pipe; the cover plate is composed of a plurality of foldable plates which are connected by hinges; at least the edge of the laminated plate close to the outside is provided with a guide roller, and a turnover slide rail is arranged relative to the guide roller.

14. The baghouse ash removal device of any of claims 1-13, wherein the movable lance device has a baghouse lid (26).

15. The baghouse ash removal device of claim 14, wherein said baghouse ash removal device is provided with a capping rod (27) and a capping rod channel (32).

16. The ash removal device of a bag-type dust collector of claim 15, wherein the bag mouth cover supporting plate (25) is provided with a buckle cover rod channel (32), and a guide hole (31) for introducing the buckle cover rod (27) is formed at a corresponding position on the side wall of the air purifying chamber; the arranged buckling cover rod (27) adopts a telescopic rod mode, and the end part of the buckling cover rod (27) extending into the buckling cover rod is provided with an elbow.

17. The bag-type dust collector ash removal device of claim 14, wherein the bag-type dust collector ash removal device is provided with a brake cable (28); the brake cable (28) enters the box body from the outside of the box body, and a steel wire of a wire core of the brake cable (28) is connected with the bag opening cover (26) through a lever type mechanism.

18. A baghouse, characterized in that it comprises a baghouse ash removal device according to any one of claims 1 to 17.

19. A method for moving ash of a bag-type dust collector, which comprises the steps of using the ash removing device of the bag-type dust collector as claimed in any one of claims 1 to 17:

1) the injection tube is fixed on the moving vehicle or is a part of the vehicle body, the moving vehicle moves linearly and drives the injection tube to move, and the injection tube moves linearly to the position above any row of filter bag openings needing to be injected and is aligned with the filter bag openings one by one accurately;

2) the air bag outside the air purifying chamber is provided with a pulse valve, the air enters the air bag through an air inlet pipe of the air bag and enters an air outlet pipe of the air bag through an outlet of the pulse valve, and then sequentially enters the air conveying pipe, the blowing pipe and the nozzle of the air purifying chamber along the air outlet pipe of the air bag and is sprayed out through the nozzle; the pulse time of the back blowing gas rushing out from the gas bag is within 10-500 milliseconds, and the pressure of the gas in the gas bag before pulse blowing is 0.05-0.7 MPa;

3) and 2) gas sprayed out from the nozzle enters the filter bag through the filter bag opening, the bag body of the filter bag is expanded, part of the gas penetrates through the filter material of the filter bag and enters the filter chamber, accelerated shaking is generated on the surface of the expanded filter material of the filter bag, and dust on the outer surface of the filter bag is separated from the outer surface of the filter bag and is settled to a dust hopper under the pushing of the shaking and the gas which penetrates through the filter bag and enters the filter chamber, and is discharged through the dust hopper.

20. The method of moving ash of a bag house as set forth in claim 19,

in the step 2), the choke cover plate synchronously moving along with the moving vehicle is used for covering or approaching at least one row of filter bag openings which are just sprayed, so that the pressure in the filter bag covered with the filter bag openings is close to the same as the pressure outside the filter bag, the choke cover plate is kept at the covering position until the moving vehicle leaves the spraying position, and the steps are repeated along with the moving vehicle to the next spraying position.

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