Powder material conveying equipment with dust collection and recycling function

Abstract

The present invention relates to the technical field of powder material conveying, and discloses a powder material conveying device with dust collection and recycling, comprising: a processing table, the top of the processing table is fixedly connected to a discharge mechanism through a support frame, the side of the processing table close to the discharge mechanism is fixedly connected to a feeding mechanism through a support frame, and the top of the processing table is fixedly connected to a positioning bracket through a support column; a dust collecting device, which is used to collect dust generated during conveying; the dust collecting device is arranged above the feeding mechanism, and the outer side of the dust collecting device is fixedly connected to the side of the positioning bracket; wherein the dust collecting device comprises: a moving seat, the side of the moving seat is fixedly connected to a movable plate. The powder material conveying device with dust collection and recycling can absorb and process dust generated during conveying, and can absorb dust at different positions, effectively improving the dust absorption range of the device.

Description

Technical Field

[0001] The invention relates to the technical field of powder material conveying, in particular to a powder material conveying device with the function of collecting and recycling dust. Background Art

[0002] In modern industrial production, the transportation of powder materials is a common and important link. With the continuous development of industry, higher requirements are put forward for the efficient and stable transportation of powder materials. Traditional powder material conveying equipment often generates a lot of dust during operation. These dusts not only cause serious pollution to the working environment and affect the health of operators, but also lead to waste of powder materials. On the one hand, the dust is diffused in the air, which reduces the air quality in the workplace, may cause health problems such as respiratory diseases, and does not meet environmental protection requirements. On the other hand, the uncollected dust means the loss of powder materials and increases production costs. In addition, many industries have high requirements for the purity of powder materials. If the dust cannot be effectively collected and recycled, it may affect the quality of the product after mixing with other impurities. For example, in the pharmaceutical and electronics industries, tiny impurities may have a significant impact on the performance of the final product.

[0003] When conveying powder, the existing device cannot absorb and process the dust generated during the conveying, and cannot absorb the dust at different positions. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides: a powder material conveying device with dust collection and recycling, comprising:

[0005] A processing table, wherein the top of the processing table is fixedly connected to a discharge mechanism via a support frame, a side of the processing table close to the discharge mechanism is fixedly connected to a feeding mechanism via a support frame, and the top of the processing table is fixedly connected to a positioning bracket via a support column;

[0006] A dust collecting device, which is used to collect dust generated during transportation;

[0007] The dust collecting device is arranged above the feeding mechanism, and the outer side of the dust collecting device is fixedly connected to the side of the positioning bracket;

[0008] Wherein, the dust collecting device comprises:

[0009] A movable seat, a movable plate is fixedly connected to the side of the movable seat, and a side of the movable plate away from the movable seat is slidably connected to an electric slide rail through an electric slider. When the electric slide rail is turned on, the electric slider inside the electric slide rail drives the movable plate to move, and the movable plate drives the movable seat to slide. During the sliding process, the movable seat drives the dust suction pipe to move, so that the dust suction pipe can absorb dust at different positions, effectively improving the dust suction range of the device and enhancing the dust suction efficiency. A reinforcement plate is fixedly connected to the side of the electric slide rail away from the movable plate;

[0010] An air intake pipe, the top of which is connected to an air pump;

[0011] A dust suction pipe, one end of which is connected to an air supply pipe, and one side of which is connected to a connecting pipe. The discharge mechanism discharges the powder into the feeding mechanism, and the feeding mechanism can be started to transfer the powder to another group of containers. When the feeding mechanism transports the powder, the vacuum pump is turned on. After the vacuum pump is turned on, the dust generated during transportation is sucked from the dust suction pipe into the air supply pipe, and then discharged into the connecting pipe through the air supply pipe. Subsequently, the sucked dust enters the processing device from the connecting pipe for separation and treatment. The treated gas enters the air inlet pipe and is finally discharged through the air outlet end of the vacuum pump, so that the dust generated during transportation can be absorbed and treated.

[0012] Preferably, two groups of movable plates are provided, and the two groups of movable plates are symmetrically distributed on both sides of the movable seat, one side of the reinforcement plate is fixedly connected to the side of the positioning bracket, and the air inlet end of the vacuum pump is connected to the top of the air inlet pipe.

[0013] Preferably, the dust suction pipes are provided in multiple groups, and the multiple groups of the dust suction pipes are evenly distributed on the air supply pipe. The dust suction pipes pass through the movable seat and are fixedly connected to the movable seat. The outer side of the vacuum pump is fixedly connected to the top of the movable seat through a bracket.

[0014] Preferably, the dust collecting device also includes a processing device, the bottom of which is fixedly connected to the top of the movable seat, the top of which is connected to the bottom of the air inlet pipe, and the end of the connecting pipe away from the air supply pipe is connected to the side of the processing device.

[0015] Preferably, the processing device comprises a processing cylinder, the outer side of the processing cylinder is connected to a discharge frame near the bottom, the inner wall of the processing cylinder is fixedly connected to a filter screen, the top of the filter screen is located at the center and is fixedly connected to a fixed disk, the side of the fixed disk is penetrated by a cleaning device, the inner wall of the processing cylinder is fixedly connected to an annular sealing plate, the bottom of the inner wall of the processing cylinder is fixedly connected to an electric telescopic rod, the movable end of the electric telescopic rod is fixedly connected to a sealing plug, the dust is discharged from the connecting pipe into the interior of the processing cylinder, and the filter screen in the processing cylinder removes the powder in the gas. Separation filtration blocks the powder on one side of the filter, while the gas can smoothly pass through the filter into the air inlet pipe. When the powder at the bottom of the filter needs to be recovered, first turn off the vacuum pump, and the powder on one side of the filter falls and accumulates at the bottom of the treatment tube. Then turn on the electric telescopic rod, and after the electric telescopic rod is extended, it pushes the sealing plug to make the sealing plug pass through the annular sealing plate, and the powder in the treatment tube falls from the annular sealing plate. Finally, manually open the discharge frame to take out the fallen powder, which can effectively separate the powder inside the gas and is convenient to operate when removing dust.

[0016] Preferably, the top of the treatment cylinder is connected to the bottom of the air inlet pipe, the side of the treatment cylinder is connected to one end of the connecting pipe, and the bottom of the treatment cylinder is fixedly connected to the top of the movable seat.

[0017] Preferably, the sealing plug passes through the annular sealing plate and is slidably connected to the inner wall of the annular sealing plate. Two groups of discharge frames are provided, and the two groups of discharge frames are symmetrically distributed on both sides of the processing cylinder.

[0018] Preferably, the cleaning device includes a driving motor, the output end of the driving motor is fixedly connected to a rotating disk, the outer side of the rotating disk is fixedly connected to a brush plate, the driving motor drives the rotating disk to rotate via the output end, and the rotating disk drives the brush plate to rotate when it rotates, and the brush plate cleans the bottom of the filter screen with a bristle brush head during rotation, so as to brush off the dust adhered to the bottom of the filter screen, thereby preventing powder from accumulating at the bottom of the filter screen and affecting the passage of gas, thereby effectively improving the filtering and separation efficiency of the filter screen and also improving the recovery rate of the powder.

[0019] Preferably, a bristle brush head is fixedly connected to the top of the brush plate, and the brush plates are provided in multiple groups, and the multiple groups of brush plates are evenly distributed on the outside of the rotating disk. The output end of the driving motor passes through the fixed disk and is rotatably connected to the fixed disk through a rolling bearing, and the bottom of the driving motor is fixedly connected to the top of the fixed disk.

[0020] The present invention provides a powder material conveying device with dust collection and recycling function. It has the following beneficial effects:

[0021] 1. A powder material conveying equipment with dust collection and recycling function. Through the installation of a dust collecting device, the discharge mechanism discharges the powder into the feeding mechanism, and the feeding mechanism can be started to transfer the powder to another group of containers. When the feeding mechanism conveys the powder, the vacuum pump is turned on. After the vacuum pump is turned on, the dust generated during transportation is sucked into the air supply pipe from the dust suction pipe, and then discharged into the connecting pipe through the air supply pipe. Subsequently, the sucked dust enters the processing device from the connecting pipe for separation and processing. The processed gas enters the air inlet pipe and is finally discharged through the air outlet end of the vacuum pump, thereby absorbing and processing the dust generated during transportation.

[0022] 2. This kind of powder material conveying equipment with dust collection and recycling function, through the installation of electric slide rails and movable seats, the electric slide rails are turned on, and the electric slider inside the electric slide rails drives the movable plate to move, and the movable plate drives the movable seat to slide, and the movable seat drives the dust collection pipe to move during the sliding process, so that the dust collection pipe can absorb dust at different positions, effectively improving the dust collection range of the device and enhancing the dust collection efficiency.

[0023] 3. This is a powder material conveying equipment with dust collection and recycling. Through the installation of the processing device, the dust is discharged from the connecting pipe into the interior of the processing tube. The filter in the processing tube separates and filters the powder in the gas and blocks the powder on one side of the filter, while the gas can smoothly pass through the filter into the air inlet pipe. When the powder at the bottom of the filter needs to be recovered, the vacuum pump is first turned off, and the powder on one side of the filter falls and accumulates at the bottom of the processing tube. Then the electric telescopic rod is turned on. After the electric telescopic rod is extended, it pushes the sealing plug to make the sealing plug pass through the annular sealing plate, and the powder in the processing tube falls from the annular sealing plate. Finally, the discharge frame is manually opened to take out the fallen powder, which can effectively separate the powder inside the gas and is convenient to operate when removing the dust.

[0024] 4. This kind of powder material conveying equipment with dust collection and recycling function, through the installation of the cleaning device, the driving motor drives the rotating disk to rotate through the output end, and the rotating disk drives the brush plate to rotate when the rotating disk rotates. During the rotation process, the brush plate cleans the bottom of the filter screen with a bristle brush head, and the dust adhering to the bottom of the filter screen is brushed off to avoid the accumulation of powder at the bottom of the filter screen that affects the passage of gas, effectively improves the filtering and separation efficiency of the filter screen, and also improves the recovery rate of the powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the powder material conveying equipment with dust collection and recycling of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the reinforcement plate of the present invention;

[0027] Figure 3It is a structural schematic diagram of the mobile seat of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the movable plate of the present invention;

[0029] Figure 5 It is a structural schematic diagram of the connecting pipe of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the air intake pipe of the present invention;

[0031] Figure 7 It is a schematic diagram of the internal structure of the treatment cylinder of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the brush plate of the present invention.

[0033] In the figure: 1. processing table; 2. discharge mechanism; 3. feeding mechanism; 4. positioning bracket; 5. dust collecting device; 51. moving seat; 52. movable plate; 53. electric slide rail; 54. reinforcement plate; 55. air inlet pipe; 56. vacuum pump; 57. dust suction pipe; 58. air supply pipe; 59. processing device; 591. processing cylinder; 592. discharge frame; 593. filter screen; 594. fixed disk; 595. cleaning device; 5951. driving motor; 5952. rotating disk; 5953. brush plate; 596. annular sealing plate; 597. electric telescopic rod; 598. sealing plug; 510. connecting pipe. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0035] For the first embodiment, please refer to Figure 1-Figure 5 The present invention provides a technical solution: a powder material conveying device with dust collection and recycling, comprising:

[0036] A processing table 1, the top of the processing table 1 is fixedly connected to a discharge mechanism 2 through a support frame, a side of the processing table 1 close to the discharge mechanism 2 is fixedly connected to a feeding mechanism 3 through a support frame, and the top of the processing table 1 is fixedly connected to a positioning bracket 4 through a support column;

[0037] A dust collecting device 5, which is used to collect dust generated during transportation;

[0038] The dust collecting device 5 is arranged above the feeding mechanism 3, and the outer side of the dust collecting device 5 is fixedly connected to the side of the positioning bracket 4;

[0039] Wherein, the dust collecting device 5 comprises:

[0040] A movable seat 51, a movable plate 52 is fixedly connected to the side of the movable seat 51, a side of the movable plate 52 away from the movable seat 51 is slidably connected to an electric slide rail 53 through an electric slider, and a side of the electric slide rail 53 away from the movable plate 52 is fixedly connected to a reinforcement plate 54;

[0041] An air inlet pipe 55, the top of which is connected to an air pump 56;

[0042] The dust suction pipe 57 has one end connected to the air supply pipe 58 , and one side of the air supply pipe 58 is connected to the connecting pipe 510 .

[0043] There are two groups of movable plates 52 symmetrically distributed on both sides of the movable seat 51 . One side of the reinforcing plate 54 is fixedly connected to the side of the positioning bracket 4 . The air inlet end of the air pump 56 is connected to the top of the air inlet pipe 55 .

[0044] There are multiple groups of dust suction pipes 57, which are evenly distributed on the air supply pipe 58. The dust suction pipes 57 pass through the movable seat 51 and are fixedly connected to the movable seat 51. The outer side of the vacuum pump 56 is fixedly connected to the top of the movable seat 51 through a bracket.

[0045] The dust collecting device 5 also includes a processing device 59, the bottom of which is fixedly connected to the top of the movable seat 51, the top of which is connected to the bottom of the air inlet pipe 55, and the end of the connecting pipe 510 away from the air supply pipe 58 is connected to the side of the processing device 59.

[0046] During use, the operator pours the powder to be transferred into the discharge mechanism 2, and discharges the powder into the feeding mechanism 3 through the discharge mechanism 2, and then starts the feeding mechanism 3 to transfer the powder to another group of containers. When the feeding mechanism 3 transports the powder, the vacuum pump 56 is turned on. After the vacuum pump 56 is turned on, the dust during transportation is sucked into the air pipe 58 from the dust suction pipe 57, and then discharged into the connecting pipe 510 through the air pipe 58. Subsequently, the sucked dust enters the processing device 59 from the connecting pipe 510 for separation treatment. The treated gas enters the air inlet pipe 55 and is finally discharged through the air outlet end of the vacuum pump 56. The dust generated during transportation can be absorbed and treated, and the electric slide rail 53 is turned on. The electric slider inside the electric slide rail 53 drives the movable plate 52 to move, and the movable plate 52 drives the movable seat 51 to slide. The movable seat 51 drives the vacuum pipe 57 to move during the sliding process, so that the vacuum pipe 57 can absorb dust at different positions, effectively improving the dust collection range of the device and enhancing the dust collection efficiency.

[0047] For the second embodiment, please refer to Figure 1-Figure 8 The present invention provides a technical solution: on the basis of embodiment 1, the processing device 59 includes a processing cylinder 591, the outer side of the processing cylinder 591 is connected to a discharge frame 592 near the bottom, the inner wall of the processing cylinder 591 is fixedly connected to a filter screen 593, the top of the filter screen 593 is located at the center position and is fixedly connected to a fixed disk 594, the side of the fixed disk 594 is penetrated by a cleaning device 595, the inner wall of the processing cylinder 591 is fixedly connected to an annular sealing plate 596, the bottom of the inner wall of the processing cylinder 591 is fixedly connected to an electric telescopic rod 597, and the movable end of the electric telescopic rod 597 is fixedly connected to a sealing plug 598.

[0048] The top of the processing cylinder 591 is connected to the bottom of the air inlet pipe 55 , the side of the processing cylinder 591 is connected to one end of the connecting pipe 510 , and the bottom of the processing cylinder 591 is fixedly connected to the top of the movable seat 51 .

[0049] The sealing plug 598 penetrates the annular sealing plate 596 and is slidably connected to the inner wall of the annular sealing plate 596 . Two groups of discharge frames 592 are provided, and the two groups of discharge frames 592 are symmetrically distributed on both sides of the processing cylinder 591 .

[0050] The cleaning device 595 includes a driving motor 5951 , an output end of the driving motor 5951 is fixedly connected to a rotating disk 5952 , and an outer side of the rotating disk 5952 is fixedly connected to a brush plate 5953 .

[0051] A bristle brush head is fixedly connected to the top of the brush plate 5953. Multiple groups of brush plates 5953 are arranged, and the multiple groups of brush plates 5953 are evenly distributed on the outside of the rotating disk 5952. The output end of the driving motor 5951 passes through the fixed disk 594 and is rotatably connected to the fixed disk 594 through a rolling bearing. The bottom of the driving motor 5951 is fixedly connected to the top of the fixed disk 594.

[0052] During use, dust is discharged from the connecting pipe 510 into the interior of the processing tube 591, and the filter 593 in the processing tube 591 separates and filters the powder in the gas, blocking the powder on one side of the filter 593, while the gas can smoothly pass through the filter 593 into the air inlet pipe 55. When it is necessary to recover the powder at the bottom of the filter 593, first turn off the vacuum pump 56, and the powder on one side of the filter 593 falls and accumulates at the bottom of the processing tube 591, and then turn on the electric telescopic rod 597. After the electric telescopic rod 597 is extended, it pushes the sealing plug 598 to make the sealing plug 598 pass through the annular sealing plate 596, and the powder in the processing tube 591 falls from the annular sealing plate 596. Finally, the discharge frame 592 is manually opened to take out the fallen powder, which can effectively separate the powder inside the gas and is convenient to operate when removing dust.

[0053] Turn on the drive motor 5951 to drive the rotating disk 5952 to rotate through the output end. When the rotating disk 5952 rotates, it drives the brush plate 5953 to rotate. During the rotation process, the brush plate 5953 cleans the bottom of the filter 593 with the bristle brush head, and brushes off the dust adhering to the bottom of the filter 593, avoiding the accumulation of powder at the bottom of the filter 593 to affect the passage of gas, effectively improving the filtration and separation efficiency of the filter 593, and also improving the recovery rate of the powder.

[0054] Working principle: the operator pours the powder to be transferred into the discharge mechanism 2, and discharges the powder into the feeding mechanism 3 through the discharge mechanism 2, and then starts the feeding mechanism 3 to transfer the powder to another group of containers. When the feeding mechanism 3 transports the powder, the vacuum pump 56 is turned on. After the vacuum pump 56 is turned on, the dust generated during transportation is sucked into the air pipe 58 from the dust suction pipe 57, and then discharged into the connecting pipe 510 through the air pipe 58. Subsequently, the sucked dust enters the processing device 59 from the connecting pipe 510 for separation treatment. The treated gas enters the air inlet pipe 55 and is finally discharged through the air outlet end of the vacuum pump 56. The dust generated during transportation can be absorbed and treated, and the electric slide rail 53 is turned on. The electric slider inside the electric slide rail 53 drives the movable plate 52 to move, and the movable plate 52 drives the moving seat 51 to slide. The moving seat 51 drives the vacuum pipe 57 to move during the sliding process, so that the vacuum pipe 57 can absorb dust at different positions, and the dust is discharged from the connecting pipe 510 into the processing tube 59. 1, the filter screen 593 in the treatment cylinder 591 separates and filters the powder in the gas, and blocks the powder on one side of the filter screen 593, while the gas can smoothly pass through the filter screen 593 and enter the air inlet pipe 55. When it is necessary to recover the powder at the bottom of the filter screen 593, the vacuum pump 56 is first turned off, and the powder on one side of the filter screen 593 falls and accumulates at the bottom of the treatment cylinder 591, and then the electric telescopic rod 597 is turned on, and the electric telescopic rod 597 is extended to push the sealing plug 598, so that The sealing plug 598 passes through the annular sealing plate 596, and the powder in the processing cylinder 591 falls from the annular sealing plate 596. Finally, the discharge frame 592 is manually opened to take out the fallen powder, and the driving motor 5951 is turned on to drive the rotating disk 5952 to rotate through the output end. When the rotating disk 5952 rotates, it drives the brush plate 5953 to rotate. During the rotation process, the brush plate 5953 cleans the bottom of the filter screen 593 with the bristle brush head, and brushes off the dust adhering to the bottom of the filter screen 593.

[0055] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A powder material conveying device with dust collection and recycling, characterized in that: include: A processing table (1), wherein the top of the processing table (1) is fixedly connected to a material discharge mechanism (2) via a support frame, a side of the processing table (1) close to the material discharge mechanism (2) is fixedly connected to a material feeding mechanism (3) via a support frame, and the top of the processing table (1) is fixedly connected to a positioning bracket (4) via a support column; A dust collecting device (5), the dust collecting device (5) being used to collect dust generated during transportation; The dust collecting device (5) is arranged above the feeding mechanism (3), and the outer side of the dust collecting device (5) is fixedly connected to the side of the positioning bracket (4); Wherein, the dust collecting device (5) comprises: A movable seat (51), a movable plate (52) being fixedly connected to a side of the movable seat (51), a side of the movable plate (52) away from the movable seat (51) being slidably connected to an electric slide rail (53) via an electric slider, and a side of the electric slide rail (53) away from the movable plate (52) being fixedly connected to a reinforcement plate (54); An air intake pipe (55), the top of the air intake pipe (55) being connected to an air extraction pump (56); A dust suction pipe (57), one end of the dust suction pipe (57) being connected to an air supply pipe (58), and one side of the air supply pipe (58) being connected to a connecting pipe (510); The dust collecting device (5) further comprises a processing device (59), the bottom of the processing device (59) being fixedly connected to the top of the movable seat (51), the top of the processing device (59) being connected to the bottom of the air inlet pipe (55), and the end of the connecting pipe (510) away from the air supply pipe (58) being connected to the side of the processing device (59); The processing device (59) comprises a processing cylinder (591), the outer side of the processing cylinder (591) is connected to a discharge frame (592) near the bottom, the inner wall of the processing cylinder (591) is fixedly connected to a filter screen (593), the top of the filter screen (593) is fixedly connected to a fixed disk (594) at the center, the side of the fixed disk (594) is penetrated by a cleaning device (595), the inner wall of the processing cylinder (591) is fixedly connected to an annular sealing plate (596), the bottom of the inner wall of the processing cylinder (591) is fixedly connected to an electric telescopic rod (597), and the movable end of the electric telescopic rod (597) is fixedly connected to a sealing plug (598); The top of the processing cylinder (591) is connected to the bottom of the air inlet pipe (55), the side of the processing cylinder (591) is connected to one end of the connecting pipe (510), and the bottom of the processing cylinder (591) is fixedly connected to the top of the movable seat (51); The sealing plug (598) passes through the annular sealing plate (596) and is slidably connected to the inner wall of the annular sealing plate (596); two groups of discharge frames (592) are provided, and the two groups of discharge frames (592) are symmetrically distributed on both sides of the processing cylinder (591); The cleaning device (595) comprises a driving motor (5951), the output end of the driving motor (5951) is fixedly connected to a rotating disk (5952), and the outer side of the rotating disk (5952) is fixedly connected to a brush plate (5953); A brush head with bristles is fixedly connected to the top of the brush plate (5953), and a plurality of groups of the brush plates (5953) are provided. The plurality of groups of the brush plates (5953) are evenly distributed on the outside of the rotating disk (5952). The output end of the drive motor (5951) passes through the fixed disk (594) and is rotationally connected to the fixed disk (594) via a rolling bearing. The bottom of the drive motor (5951) is fixedly connected to the top of the fixed disk (594).

2. The powder material conveying equipment with dust collection and recycling function according to claim 1, characterized in that: Two groups of movable plates (52) are provided, and the two groups of movable plates (52) are symmetrically distributed on both sides of the movable seat (51). One side of the reinforcing plate (54) is fixedly connected to the side of the positioning bracket (4), and the air inlet end of the air pump (56) is connected to the top of the air inlet pipe (55).

3. The powder material conveying equipment with dust collection and recycling function according to claim 1, characterized in that: A plurality of groups of the dust suction pipes (57) are provided, and the plurality of groups of the dust suction pipes (57) are evenly distributed on the air supply pipe (58). The dust suction pipes (57) penetrate the movable seat (51) and are fixedly connected to the movable seat (51). The outer side of the air suction pump (56) is fixedly connected to the top of the movable seat (51) via a bracket.

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