A positive and negative pressure pneumatic conveying and transferring and recycling system for stone coal

Abstract

The present application relates to a kind of stone coal positive pressure and negative pressure pneumatic conveying transfer recovery system, and the present application belongs to stone coal conveying field, including stone coal bunker, output system and input system, the stone coal bunker and output system and input system are connected by conveying pipeline, input system is used to convey stone coal to the bag filter in stone coal bunker, wherein output system is used to convey stone coal to subsequent step, wherein input system, stone coal bunker and output system are realized by negative pressure conveying.The residual stone coal at the bottom of stone coal bunker is effectively collected and reprocessed by recycling system, and finally collected in collection bin for reuse, avoiding the waste of stone coal in traditional system, achieving the technical effect of "energy saving and emission reduction", meeting the requirements of environmental protection and resource comprehensive utilization.

Description

Technical Field

[0001] This invention belongs to the field of stone and coal transportation technology, specifically a positive and negative pressure pneumatic conveying, transfer and recovery system for stone and coal. Background Technology

[0002] Coal ash is a common byproduct of thermal power generation and industrial boilers, and its efficient recovery and reuse are crucial for resource conservation and environmental protection. Currently, the transportation, transfer, and recovery of coal ash mainly utilize pneumatic conveying systems, including positive pressure conveying, negative pressure conveying, or a combination of positive and negative pressure conveying methods. Traditionally, residual materials at the bottom of stone and coal bunkers are mostly cleaned by simple bunker pumps or manually, resulting in incomplete recycling. A large amount of stone and coal is emitted with the exhaust gas or deposited in the pipelines and cannot be effectively collected, leading to serious waste of resources and increasing the burden of subsequent environmental treatment. In view of this, a positive and negative pressure pneumatic conveying, transfer and recovery system for stone coal is proposed. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] Given the following technical problems in the existing technology: the residual material at the bottom of traditional stone and coal bunkers is mostly cleaned by simple bunker pumps or manual cleaning, which is not thorough. A large amount of stone and coal is emitted with the exhaust gas or deposited in the pipeline and cannot be effectively collected, resulting in serious waste of resources and increasing the burden of subsequent environmental protection treatment.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a positive and negative pressure pneumatic conveying and recycling system for stone coal, comprising a stone coal bunker, an output system, and an input system, wherein the stone coal bunker, the output system, and the input system are connected by conveying pipelines, the input system is used to convey stone coal to a bag filter in the stone coal bunker, and the output system is used to convey stone coal to subsequent steps, wherein the input system, the stone coal bunker, and the output system are achieved by negative pressure conveying; The bottom of the stone and coal bunker is equipped with a three-way pipe. A bunker pump is connected to the three-way pipe near the bottom of the bunker. The other two ends of the three-way pipe are connected to a gas supply and a recycling system. A pneumatic gate valve is installed on one end of the three-way pipe in the recycling system. The output end of the recycling system is connected to a collection bin for reusing the remaining stone and coal, thereby achieving energy conservation and emission reduction. The recycling system includes a recycling tank, a support base at the bottom of the recycling tank for supporting the tank, a lifting seat at the bottom of the support base for positioning the entire device at an angle according to actual needs, a power source and a linkage rod on the support base, the linkage rod passing through the axis of the recycling tank, a variable control component on the outer contour of the linkage rod near the airflow outlet and the outlet hopper, an input hopper near the airflow inlet of the recycling tank, and a temperature control component on the recycling tank. The linkage rod is equipped with a recycling processing frame one and a recycling processing frame two, which are staggered. The recycling processing frame one moves synchronously with the linkage rod, while the recycling processing frame two moves in opposite directions with the linkage rod. The recycling processing frame two is equipped with a variable component, which is installed on the outer contour of the linkage rod. The recycling processing frame one and the recycling processing frame two are milled with guide channels. The control component is positioned on the linkage rod at its center, and the outer contour of the control component is connected to the inner edge of the recycling tank.

[0006] As a preferred technical solution for a positive and negative pressure pneumatic conveying and recycling system for stone and coal, the input part of the recycling tank is equipped with an airflow inlet, and the output part of the recycling tank is equipped with an output hopper and an airflow output part, with the airflow output part located at the top and the output hopper located at the bottom.

[0007] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer and recovery system for stones and coal, the linkage rod is equipped with a linkage sleeve, wherein the linkage sleeve and the linkage rod move together, and the linkage sleeve is equipped with a cleaning box, wherein the cleaning box is milled with a double-pass cavity, wherein the double-pass cavity is open on both sides, so that when the barrier net is in effect, the small stones and coal can be collected into the double-pass cavity, and when the cleaning box is at the bottom position, it can be discharged under the influence of gravity.

[0008] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer and recycling system for stone and coal, the recycling tank is equipped with a barrier net near the inner edge of the airflow outlet to prevent stone and coal from overflowing.

[0009] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer and recycling system for stone coal, the temperature control component includes a hollow arc-shaped box, fins and internal and external passages. The hollow arc-shaped box is configured on the recycling tank, and a cavity is reserved on the hollow arc-shaped box. Fins are configured in the cavity of the hollow arc-shaped box.

[0010] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer and recovery system for stone and coal, the hollow arc-shaped box is equipped with internal and external passages on its side to facilitate the connection of a number of hollow arc-shaped boxes, and the corner of the hollow arc-shaped box is equipped with a mounting base.

[0011] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal, the variable component includes a driving cone wheel, a driven cone wheel, a docking ring, a linkage cone wheel, and a housing. The housing is disposed on the outer contour of the linkage rod, and the driving cone wheel is disposed on the outer contour of the linkage rod and located inside the housing. The inner edge of the housing is hinged to the linkage cone wheel by a movable seat, and the linkage cone wheel and the driving cone wheel engage in transmission. The housing is disposed on a docking ring, and the portion of the docking ring that extends into the housing is disposed on a driven cone wheel, and the driven cone wheel and the linkage cone wheel engage in transmission.

[0012] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal, the docking ring is mounted on the outer contour of the linkage rod by a stabilizing ring. During this process, the docking ring does not move together with the linkage rod. A pair of stabilizing rings are mounted on the outer shell, and the outer shell does not move together with the linkage rod. The second recovery and processing frame is located at the part of the docking ring that extends out of the outer shell. The second recovery and processing frame moves in opposite directions to the linkage rod by a variable component. The linkage rod causes the driving cone wheel to rotate. The driving cone wheel moves in opposite directions to the driven cone wheel by the linkage cone wheel, and the docking ring causes the second recovery and processing frame to move in opposite directions relative to the linkage rod.

[0013] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer and recovery system for stone and coal, the variable control component includes a left control frame and a right control frame. The outer periphery of the left control frame and the inner edge of the right control frame are in contact. The left control frame is configured on a linkage rod via a collar, wherein the left control frame and the linkage rod move together. The right control frame is movably configured on the collar of the left control frame. Guide channels are milled on both the left and right control frames.

[0014] As a preferred technical solution for a positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal, the outer contour of the left control frame is equipped with a first docking sleeve, and the inner edge of the recovery tank is equipped with a retaining sleeve. The first docking sleeve and the retaining sleeve are connected to each other to cover the gap. The outer contour of the right control frame is equipped with a second docking sleeve, which has a pre-reserved curved and slender channel. The first docking sleeve is equipped with a locking component, which is located in the curved and slender channel. The first docking sleeve can rotate along the second docking sleeve within a certain range. The locking component is connected to a matching component. When the right control frame rotates, the locking component changes position in the curved and slender channel. After the guide channels on the left and right control frames are moved to the appropriate positions, the matching component limits the position of the second docking sleeve, thereby regulating the space of the guide channel and facilitating the control of the final specifications of the stone and coal.

[0015] The beneficial effects of this invention are: 1. The recycling system effectively collects and reprocesses the residual stone and coal at the bottom of the stone and coal bunker, and finally gathers them into the collection bin for reuse. This avoids the waste of stone and coal in the traditional system, achieves the technical effect of "energy saving and emission reduction", and meets the requirements of environmental protection and comprehensive resource utilization. 2. By setting up recycling rack one and recycling rack two alternately inside the recycling tank, and by changing components to achieve the same and opposite movements of the two and the linkage rod, and under the drive of the power source, a complex circulating flow field of "two sides towards the middle, bottom overturning and top outward" is formed, so that the stone coal is subjected to multi-directional collision, rolling and mixing, which greatly improves the pre-treatment quality of stone coal. 3. The variable control component can adjust the size of the guide channel by rotation, flexibly controlling the smooth discharge of qualified stone and coal particles and coal powder to the output hopper, while unqualified particles continue to be processed in the tank, realizing precise control over the specifications of the final output material and improving the system's adaptability and product consistency. 4. By setting up a barrier net at the airflow outlet to prevent stones and coal from overflowing, the linkage rod drives the cleaning box to intermittently scrape the barrier net through the linkage sleeve, so as to promptly recover the attached powder into the double passage cavity and discharge it by gravity. This not only ensures the long-term unobstructed flow of the airflow channel, but also further recovers fine particles.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Wherein: Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the recycling system of the present invention.

[0019] Figure 3 This invention is based on Figure 2 Cross-sectional diagram.

[0020] Figure 4 This is a schematic diagram of the barrier mesh of the present invention.

[0021] Figure 5 This is a cross-sectional view of the cleaning box of the present invention.

[0022] Figure 6 This is a schematic diagram of the modified components of the present invention.

[0023] Figure 7 This is a schematic diagram of the variable control component of the present invention.

[0024] Figure 8 This is a schematic diagram of the temperature control component of the present invention.

[0025] Figure label: 100. Stone and coal bunker; 101. Bunker pump; 102. Air supply source; 103. Pneumatic gate valve; 200. Output system; 300. Input system; 400. Recycling system; 401. Recycling tank; 4010. Feed hopper; 4011. Output hopper; 4012. Airflow inlet; 4013. Airflow outlet; 4014. Barrier net; 402. Power source; 403. Linkage rod; 4030. Linkage sleeve; 4031. Cleaning box; 4032. Double-pass cavity; 404. Support seat; 405. Lifting seat; 406. Temperature control component; 4060. Hollow arc-shaped box; 4061. Wings 4062. Internal and external passages; 4063. Mounting base; 407. Variable component; 4070. Driving cone wheel; 4071. Driven cone wheel; 4072. Docking ring; 4073. Linkage cone wheel; 4074. Movable seat; 4075. Housing; 4076. Stabilizing ring; 4077. Smoothing ring; 408. Recycling rack one; 409. Recycling rack two; 410. Variable control component; 4100. Left control frame; 4101. Right control frame; 4102. Docking sleeve one; 4103. Locking element; 4104. Docking sleeve two; 4105. Matching parts; 4106. Stop sleeve; 500. Collection bin. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0028] Example, refer to Figure 1 A pneumatic conveying and recycling system for stone coal under positive and negative pressure includes a stone coal bunker 100, an output system 200, and an input system 300. The stone coal bunker 100, the output system 200, and the input system 300 are connected by conveying pipelines. The input system 300 is used to convey stone coal to a bag filter in the stone coal bunker 100, and the output system 200 is used to convey stone coal to subsequent steps. The input system 300, the stone coal bunker 100, and the output system 200 are connected by negative pressure conveying. The bottom of the stone and coal bunker 100 is equipped with a three-way pipe. The part of the three-way pipe near the bottom of the stone and coal bunker 100 is connected to the bunker pump 101. The other two ends of the three-way pipe are connected to the air supply 102 and the recycling system 400. A pneumatic gate valve 103 is installed on one end of the three-way pipe in the recycling system 400. The output end of the recycling system 400 is connected to the collection bin 500, which is used to reuse the remaining stone and coal to achieve the effect of energy saving and emission reduction.

[0029] Reference Figure 2 and Figure 3 The recycling system 400 includes a recycling tank 401, with a support base 404 at the bottom of the tank 401. The support base 404 supports the recycling tank 401. A lifting seat 405 is located at the bottom of the support base 404, allowing the entire device to be positioned at an angle according to actual needs. An airflow inlet 4012 is located at the inlet of the recycling tank 401, and an outlet hopper 4011 is located at the outlet of the recycling tank 401. The airflow output section 4013 is located at the top, and the output hopper 4011 is located at the bottom. The support base 404 is equipped with a power source 402 and a linkage rod 403. The linkage rod 403 passes through the axis of the recycling tank 401. A variable control component 410 is provided on the outer contour of the part of the linkage rod 403 close to the airflow output section 4013 and the output hopper 4011. The recycling tank 401 is equipped with an input hopper 4010 near the airflow inlet section 4012.

[0030] Reference Figure 4 and Figure 5 The recycling tank 401 is equipped with a barrier net 4014 near the inner edge of the airflow outlet 4013 to prevent the overflow of stones and coal. A linkage sleeve 4030 is configured on the linkage rod 403, wherein the linkage sleeve 4030 and the linkage rod 403 move together. A cleaning box 4031 is configured on the linkage sleeve 4031, wherein a double passage cavity 4032 is milled in the cleaning box 4031, wherein the double passage cavity 4032 is a two-sided opening type, which facilitates the collection of small stones and coal into the double passage cavity 4032 when the barrier net 4014 is in effect. When the cleaning box 4031 is in the lowest position, it can be discharged under the influence of gravity.

[0031] Reference Figure 3 A mixing component is configured on the linkage rod 403. The mixing component includes a first recycling frame 408 and a second recycling frame 409. The first recycling frame 408 and the second recycling frame 409 are staggered. The first recycling frame 408 and the linkage rod 403 move synchronously, while the second recycling frame 409 and the linkage rod 403 move in opposite directions. A changing component 407 is configured on the second recycling frame 409. The changing component 407 is installed on the outer contour of the linkage rod 403. Guide channels are milled on the first recycling frame 408 and the second recycling frame 409.

[0032] Reference Figure 6 The variable component 407 includes a driving cone wheel 4070, a driven cone wheel 4071, a docking ring 4072, a linkage cone wheel 4073, and a housing 4075. The housing 4075 is disposed on the outer contour of the linkage rod 403. The driving cone wheel 4070 is disposed on the outer contour of the linkage rod 403 and is located inside the housing 4075. The linkage cone wheel 4073 is hinged to the inner edge of the housing 4075 by a movable seat 4074, and the linkage cone wheel 4073 and the driving cone wheel 4070 engage in transmission. The docking ring 4072 is disposed on the housing 4075. The driven cone wheel 4071 is disposed at the part of the docking ring 4072 that extends into the housing 4075. The driven cone wheel 4071 and the linkage cone wheel 4073 engage in transmission. The docking ring 4072 is supported by a stable... Ring 4076 is disposed on the outer contour of linkage rod 403. During this process, docking ring 4072 does not move together with linkage rod 403. A pair of stabilizing rings 4077 are disposed on housing 4075, and housing 4075 does not move together with linkage rod 403. Recycling processing rack 409 is disposed at the part where docking ring 4072 extends out of housing 4075. Recycling processing rack 409 and linkage rod 403 move in opposite directions by means of change component 407. Linkage rod 403 causes drive cone wheel 4070 to rotate. Drive cone wheel 4070 causes driven cone wheel 4071 to move in opposite directions by means of linkage cone wheel 4073, and docking ring 4072 causes recycling processing rack 409 to move in opposite directions relative to linkage rod 403.

[0033] Reference Figure 7 The control assembly 410 is positioned on the linkage rod 403 at its center. The outer contour of the control assembly 410 is connected to the inner edge of the recycling tank 401. The control assembly 410 includes a left control frame 4100 and a right control frame 4101. The outer periphery of the left control frame 4100 and the inner edge of the right control frame 4101 are in contact. The left control frame 4100 is mounted on the linkage rod 403 via a collar. The left control frame 4100 and the linkage rod 403 move together. The right control frame 4101 is movably mounted on the collar of the left control frame 4100. Guide channels are milled on both the left control frame 4100 and the right control frame 4101. The left control frame 4100 has a first docking sleeve 4102 on its outer contour, and a retaining sleeve 4106 is provided on the inner edge of the recycling tank 401. The first docking sleeve 4102 and the retaining sleeve 4106 are connected to cover their gaps. The right control frame 4101 has a second docking sleeve 4104 on its outer contour. The second docking sleeve 4104 has a curved and slender channel. The first docking sleeve 4102 is provided with a locking element 4103, which is located in the curved and slender channel. The first docking sleeve 4102 can move along the docking sleeve. The locking element 4103 is connected to the matching element 4105, which rotates within a certain range on the second control frame 4101. The right control frame 4101 rotates, and at this time the locking element 4103 changes position in the curved and slender channel. After the guide channels on the left control frame 4100 and the right control frame 4101 are moved to the appropriate position, the matching element 4105 is used to limit the position of the second docking sleeve 4104, thereby regulating the space of the guide channel and facilitating the control of the final specifications of the stone coal.

[0034] Reference Figure 8 The recycling tank 401 is equipped with a temperature control component 406, which includes a hollow arc-shaped box 4060, fins 4061, and internal and external passages 4062. The hollow arc-shaped box 4060 is mounted on the recycling tank 401 and has a cavity. Fins 4061 are arranged in the cavity of the hollow arc-shaped box 4060. Internal and external passages 4062 are arranged on the side of the hollow arc-shaped box 4060 to facilitate the connection of several hollow arc-shaped boxes 4060. A mounting base 4063 is arranged at the corner of the hollow arc-shaped box 4060.

[0035] The above achieves the following: Power source 402 drives linkage 403 to rotate, which in turn moves recycling rack 408. During this process, variable component 407 causes recycling rack 409 to move in the opposite direction. The stones and coal are fed from hopper 4010 into recycling tank 401. Under the action of recycling racks 408 and 409, the stones and coal are subjected to forces from multiple directions. The stones and coal materials on both sides converge, collide, and tumble at the center, forming a process of "both sides towards the center, bottom overturning, and top scattering." The circulating flow further improves the pretreatment effect of the stone coal. The airflow inlet 4012 allows the airflow inside the recycling tank 401 to assist the stone coal to move gradually toward the output hopper 4011. The variable control component 410 allows the recycled stone coal particles and coal powder that meet the requirements to be discharged to the output hopper 4011. Those that do not meet the requirements continue to be processed. At the airflow outlet 4013, some powder will adhere to the barrier net 4014. When the linkage rod 403 rotates, the linkage sleeve 4030 will cause the cleaning box 4031 to move intermittently on the barrier net 4014, which can recycle and reuse the powder particles left on the barrier net 4014, while ensuring the stability of the airflow.

[0036] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A pneumatic conveying, transfer, and recovery system for gravel and coal under positive and negative pressure, characterized in that: It includes a coal and stone bunker, an output system, and an input system, wherein the coal and stone bunker, the output system, and the input system are connected by a conveying pipeline; The bottom of the stone and coal bunker is equipped with a three-way pipe. A bunker pump is connected to the three-way pipe near the bottom of the stone and coal bunker. The other two ends of the three-way pipe are connected to a gas supply and a recycling system. A pneumatic gate valve is installed on one end of the three-way pipe in the recycling system. The output end of the recycling system is connected to a collection bin. The recycling system includes a recycling tank, a support base at the bottom of the recycling tank, a lifting base at the bottom of the support base, a power source and a linkage rod on the support base, the linkage rod passing through the axis of the recycling tank, a variable control component on the outer contour of the linkage rod near the airflow outlet and the outlet hopper, an input hopper near the airflow inlet of the recycling tank, and a temperature control component on the recycling tank. The linkage rod is equipped with a recycling rack one and a recycling rack two, which are staggered. The recycling rack two is equipped with a variable component, which is installed on the outer contour of the linkage rod. The recycling rack one and the recycling rack two are milled with guide channels. The control component is positioned on the linkage rod at its center, and the outer contour of the control component is connected to the inner edge of the recycling tank.

2. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: The input part of the recycling tank is equipped with an airflow inlet, and the output part of the recycling tank is equipped with an output hopper and an airflow outlet, with the airflow outlet located at the top and the output hopper located at the bottom.

3. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: The linkage rod is equipped with a linkage sleeve, which moves together with the linkage rod. The linkage sleeve is equipped with a cleaning box, and the cleaning box is milled with a double-through cavity.

4. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: A barrier net is installed on the inner edge of the recycling tank near the airflow outlet.

5. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: The temperature control component includes a hollow arc-shaped box, fins, and internal and external passages. The hollow arc-shaped box is disposed on a recycling tank. A cavity is reserved on the hollow arc-shaped box, and fins are disposed in the cavity of the hollow arc-shaped box.

6. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 5, characterized in that: The hollow arc-shaped box has internal and external passages on its side, and a mounting base is provided at the corner of the hollow arc-shaped box.

7. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: The variable component includes a driving cone wheel, a driven cone wheel, a docking ring, a linkage cone wheel, and a housing. The housing is disposed on the outer contour of the linkage rod. The driving cone wheel is disposed on the outer contour of the linkage rod and is located inside the housing. The inner edge of the housing is hinged to the linkage cone wheel by a movable seat, and the linkage cone wheel and the driving cone wheel engage in transmission. The housing is disposed on a docking ring, and the portion of the docking ring that extends into the housing is disposed on a driven cone wheel. The driven cone wheel and the linkage cone wheel engage in transmission.

8. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 7, characterized in that: The docking ring is mounted on the outer contour of the linkage rod by means of a stabilizing ring. A pair of stabilizing rings are mounted on the outer shell. The second recycling rack is located at the part of the docking ring that extends out of the outer shell.

9. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 1, characterized in that: The variable control assembly includes a left control frame and a right control frame. The outer periphery of the left control frame and the inner edge of the right control frame are in contact. The left control frame is mounted on a linkage rod via a collar. The right control frame is movably mounted on the collar of the left control frame. Guide channels are milled on both the left and right control frames.

10. The positive and negative pressure pneumatic conveying, transfer, and recovery system for stone and coal according to claim 9, characterized in that: The outer contour of the left control frame is provided with a first docking sleeve, and the inner edge of the recycling tank is provided with a retaining sleeve. The first docking sleeve and the retaining sleeve are docked together. The outer contour of the right control frame is provided with a second docking sleeve. The second docking sleeve has a curved and slender channel. The first docking sleeve is provided with a locking component. The locking component is located in the curved and slender channel. The locking component is connected to a matching component.

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