Filter element detection device convenient for replacing detection sample

Abstract

The invention belongs to the technical field of detection equipment, and particularly relates to a filter element detection device convenient to replace a detection sample, which comprises a box body, an upper plate and a lower plate which can be close to each other are arranged in the box body, butt joints are fixed on the upper plate and the lower plate in a penetrating manner, hoses are connected to the two butt joints, and the upper hose is connected with a water supply mechanism. The bottom end of the detection pipe is connected with a drainage pipe, the drainage pipe is fixed to the bottom of the box body in a penetrating mode, a baffle ring is arranged in the detection pipe, a sealing plate used for blocking the baffle ring is arranged below the baffle ring, a pair of guide columns are inserted into the sealing plate, the top ends of the guide columns are fixedly connected with the baffle ring, and the guide columns are sleeved with first springs; the two ends of the first spring are fixedly connected with the guide column and the baffle ring respectively. According to the filter element detection device, by arranging the sealing plate, whether the filter element is blocked or not can be judged according to time or water flow, and therefore detection of the filter element is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a filter element detection device which is convenient for replacing detection samples. Background Art

[0002] Membrane separation technology is praised as "one of the most promising high-tech technologies in the mid-21st century". Among them, microporous membrane separation is most noticeable in the fields of biology, chemical analysis and pharmaceuticals. It does not require membrane replacement and filter cleaning, eliminating complex and time-consuming preparation work. It is widely used in laboratories. The syringe filter has a simple and reasonable structure, low cost, good filtering effect, and strong universal applicability. It can be used as a fast, convenient and reliable filtering and processing device for small-volume samples for routine laboratory use.

[0003] In order to solve the problem of low detection efficiency of existing equipment, a Chinese patent with publication number CN113281233B discloses a filter element detection device that is easy to replace the detection sample, including a workbench and a filter element, a mounting mechanism is set on the workbench, the filter element is installed in the mounting mechanism, a detection mechanism is installed on the workbench, the detection mechanism includes a first detection member, a second detection member and a water tank assembly, the first detection member is installed on the workbench, the second detection member is installed in the mounting mechanism, the water tank assembly is installed on the workbench and connected with the first detection member, the mounting mechanism includes a mounting frame assembly and a placement assembly, the mounting frame assembly is installed on the workbench, the placement assembly is installed on the mounting frame assembly, and the filter element is installed on the placement assembly. Although the existing technical problems have been solved, the following problems still exist: In this technical solution, the data detected by two ultrasonic flow meters are compared to detect the filter element. This makes the equipment expensive and increases the number of failure points. Therefore, corresponding improvements are made to address this problem. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a filter element detection device which is convenient for replacing the detection sample.

[0005] The present invention proposes a filter element detection device which is convenient for replacing detection samples, comprising a box body, wherein an upper plate and a lower plate which can be close to each other are arranged in the box body, and a butt joint is fixed through the upper plate and the lower plate, and hoses are connected to the two butt joints, the upper hose is connected to a water supply mechanism, and the lower hose is connected to a detection tube, and the bottom end of the detection tube is connected to a drainage pipe, and the drainage pipe is fixed through the bottom of the box body, a retaining ring is arranged in the detection tube, and a sealing plate for blocking the retaining ring is arranged below the retaining ring, and a pair of guide posts are inserted on the sealing plate, and the top of the guide post is fixedly connected to the retaining ring, and a first spring is sleeved on the guide post, and the two ends of the first spring are respectively fixed to the guide post and the retaining ring Fixed connection; place the filter element between the two butt joints, and then drive the upper plate and the lower plate closer to each other until the two butt joints are connected to the interfaces at both ends of the filter element, and then pass water to the upper hose through the water supply mechanism, and the water will pass through the filter element and the lower hose and enter the detection tube. If the filter element is not blocked, the water will quickly enter the detection tube, and then push the sealing plate downward, the water will flow downward from the retaining ring and flow out of the drain pipe at a larger flow rate. On the contrary, if the filter element is blocked, the water will take a long time to flow out of the drain pipe at a smaller flow rate. In this way, it can be judged according to time or water flow, thereby realizing the detection of the filter element.

[0006] Preferably, the water supply mechanism includes a water tank fixed on the top of the box body, a water pump is fixed in the water tank, and the water outlet of the water pump is connected to the upper hose; when the water pump is started, the water in the water tank is pumped into the upper hose for water supply.

[0007] Preferably, electric push rods are fixed on the opposite sides of the upper plate and the lower plate, and the other ends of the two electric push rods are fixedly connected to the top wall and the bottom wall of the box body respectively; in this way, the upper plate and the lower plate can be controlled by the electric push rods to approach each other to dock with the filter element or move away from each other to loosen the filter element.

[0008] Preferably, an extension tube is provided on the side of the detection tube, a switch is fixed on the outer end of the extension tube, a contact rod is inserted in the extension tube, a second rack is fixed on the inner end of the contact rod, a gear is rotatably connected in the detection tube, a first rack is fixed on the bottom end of the sealing plate, the first rack and the second rack are both meshed and connected with the gear, and a warning light electrically connected to the switch is fixed on the top of the box body; if the filter element is not blocked, the water pressure of the water entering the detection tube will be greater, so that the sealing plate will move downward a greater distance, and then the sealing plate will drive the gear to rotate through the meshing of the first rack, and then the gear will mesh with the second rack to push the contact rod outward, and then the contact rod will contact the switch, and then the warning light will light up, on the contrary, if the filter element is blocked, the contact rod will not contact the switch, and then the warning light will not light up, so that whether the filter element is qualified can be judged by observing whether the warning light is on, making the detection simpler.

[0009] Preferably, a controller electrically connected to the switch is fixed at the top of the box body, and a pressure sensor for detecting the water pressure inside the detection tube is fixed at the top of the detection tube, and the pressure sensor is electrically connected to the controller; the pressure sensor will detect the water pressure above the retaining ring multiple times within a period of time at the beginning of the detection, and send the data to the controller. For a clogged filter element, the water pressure will not reach the set threshold during this period, and then the controller will issue a command to the electric push rod, and the electric push rod will retract to loosen the filter element. For an unblocked filter element, the controller will receive data that the water pressure reaches the set threshold during this period. At this time, the controller will not issue a command to the electric push rod, but wait for the signal from the switch. The switch will transmit the signal to the controller, and after processing the signal, the controller will issue a command to the electric push rod, and then the electric push rod will retract to loosen the filter element. In this way, the electric push rod can automatically loosen both qualified and unqualified filter elements, thereby facilitating the replacement of the filter element.

[0010] Preferably, a conveying frame for conveying filter elements passing through the upper plate and the lower plate is provided in the box body, and two sides of the conveying frame are fixedly connected to the box body through a pair of fixing frames respectively, and a gap is opened in the middle position of the conveying frame between the upper plate and the lower plate, and a clamping assembly is provided at the gap, and a pushing assembly is provided in the conveying frame; the conveying frame forms a to-be-detected area and an inspected area on both sides of the gap respectively, and multiple filter elements are neatly stacked in the to-be-detected area in the conveying frame; when the electric push rod releases the filter element, the controller will send a command to the pushing assembly, and the pushing assembly will push the multiple filter elements along the direction of the conveying frame, and the filter element in the to-be-detected area will push the filter element in the clamping assembly to the inspected area until the next filter element enters the clamping assembly, thereby realizing automatic replacement of the filter element.

[0011] Preferably, the clamping assembly includes a pair of clamps that can embrace the filter element, and the two ends of the clamps are respectively provided with introduction parts opposite to the arc direction of the clamps, and an elastic connection is formed between the clamps and the box body; when the filter element is subjected to thrust, the two clamps will be stretched apart by the introduction part until the filter element enters between the two clamps, and under the action of elastic force, the two clamps will embrace the filter element and fix it. Similarly, after the detection is completed, the filter element will be pushed out from between the two clamps and enter the detected area.

[0012] Preferably, L-shaped frame plates are fixed to the inner walls on both sides of the box body, an L-shaped sliding rod is inserted on the frame plate, one end of the sliding rod is fixedly connected to the clamping plate, the other end of the sliding rod is inserted with a guide rod, the end of the guide rod is fixedly connected to the frame plate, a second spring is sleeved on the guide rod, the two ends of the second spring are respectively fixedly connected to the frame plate and the sliding rod; in this way, the elastic force of the second spring can act on the sliding rod, so that the two clamping plates can hold the filter element, and the clamping plates can be limited and moved through the cooperation between the sliding rod and the frame plate.

[0013] Preferably, the pushing assembly includes a slide rail fixed to the inner wall of one side of the box body, a slider is slidably connected in the slide rail, a push plate that can move along the conveying frame is fixed on the inner side of the slider, a screw is rotatably connected in the slide rail, the screw and the slider are threadedly connected, a motor is fixed at one end of the slide rail, and the output shaft of the motor is fixedly connected to the end of the screw; after receiving the command from the controller, the motor will drive the screw to rotate, and the rotating screw will drive the slider to move in the direction of the detected area, and then the slider will push the filter elements one by one through the push plate.

[0014] Compared with the prior art, the present invention provides a filter element detection device that is convenient for replacing detection samples, and has the following beneficial effects: 1. A filter element detection device that is convenient for replacing detection samples. By setting a sealing plate, it is possible to determine whether the filter element is blocked based on time or water flow, thereby realizing the detection of the filter element.

[0015] 2. A filter element detection device that is convenient for replacing test samples. By setting a controller, a switch and a prompt light, it is possible to judge whether the filter element is qualified by observing whether the prompt light is on, making the detection simpler.

[0016] 3. A filter element detection device that is convenient for replacing test samples. By setting a pressure sensor, a controller and a switch, an electric push rod can automatically loosen both qualified and unqualified filter elements, thereby facilitating the replacement of filter elements.

[0017] 4. A filter element detection device that is convenient for replacing test samples. By setting a conveying frame, a pushing component will push multiple filter elements along the direction of the conveying frame, and the filter element in the area to be tested will push the filter element in the clamping component to the tested area until the next filter element enters the clamping component, thereby realizing automatic replacement of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 2 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 3 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 4 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 5 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 6A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 7 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Figure 8 A schematic diagram of the structure of a filter element detection device for facilitating replacement of detection samples proposed by the present invention; Fig. 9 The present invention is a schematic structural diagram of a filter element detection device that is convenient for replacing detection samples.

[0019] In the figure: 1. box body; 2. upper plate; 3. lower plate; 4. docking joint; 5. hose; 6. detection tube; 7. drain pipe; 8. retaining ring; 9. sealing plate; 10. guide column; 11. first spring; 12. water tank; 13. water pump; 14. electric push rod; 15. push plate; 16. extension tube; 17. switch; 18. first rack; 19. second rack; 20. gear; 21. touch rod; 22. warning light; 23. pressure sensor; 24. controller; 25. conveying frame; 26. fixed frame; 27. notch; 28. frame plate; 29. ​​slide rod; 30. clamping plate; 31. introduction part; 32. guide rod; 33. second spring; 34. slide rail; 35. screw; 36. motor; 37. slider. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] Reference Figure 1-Figure 9, a filter element detection device convenient for replacing detection samples, comprising a box body 1, an upper plate 2 and a lower plate 3 that can be close to each other are arranged in the box body 1, a butt joint 4 is fixed through the upper plate 2 and the lower plate 3, and hoses 5 are connected to the two butt joints 4, the upper hose 5 is connected to a water supply mechanism, and the lower hose 5 is connected to a detection tube 6, and the bottom end of the detection tube 6 is connected to a drain pipe 7, and the drain pipe 7 is fixed through the bottom of the box body 1, a retaining ring 8 is arranged in the detection tube 6, and a sealing plate 9 for blocking the retaining ring 8 is arranged below the retaining ring 8, and a pair of guide pillars 10 are inserted on the sealing plate 9, and the top of the guide pillar 10 is fixedly connected to the retaining ring 8, and a first spring 11 is sleeved on the guide pillar 10, and the two ends of the first spring 11 are respectively fixedly connected to the guide pillar 10 and the retaining ring 8; It should be noted that the filter element is placed between the two docking joints 4, and then the upper plate 2 and the lower plate 3 are driven closer to each other until the two docking joints 4 are docked to the two end interfaces of the filter element, and then water is passed to the upper hose 5 through the water supply mechanism. The water will pass through the filter element and the lower hose 5 and enter the detection tube 6. If the filter element is not blocked, the water will quickly enter the detection tube 6, and then the sealing plate 9 is pushed downward, the water will flow downward from the retaining ring 8 and flow out from the drain pipe 7 at a larger flow rate. On the contrary, if the filter element is blocked, the water will take a long time to flow out from the drain pipe 7 at a smaller flow rate. In this way, it is possible to make a judgment based on time or water flow, thereby realizing the detection of the filter element.

[0023] The water supply mechanism includes a water tank 12 fixed on the top of the box body 1, a water pump 13 is fixed in the water tank 12, and the water outlet of the water pump 13 is connected to the upper hose 5; It should be noted that, after the water pump 13 is started, the water in the water tank 12 will be pumped into the upper hose 5 for water supply.

[0024] Among them, electric push rods 14 are fixed on the opposite sides of the upper plate 2 and the lower plate 3, and the other ends of the two electric push rods 14 are fixedly connected to the top wall and the bottom wall of the box body 1 respectively; It should be noted that, in this way, the upper plate 2 and the lower plate 3 can be controlled by the electric push rod 14 to move closer to each other to dock with the filter element or move away from each other to release the filter element.

[0025] Further, an extension tube 16 is provided on the side of the detection tube 6, a switch 17 is fixed to the outer end of the extension tube 16, a touch rod 21 is inserted into the extension tube 16, a second rack 19 is fixed to the inner end of the touch rod 21, a gear 20 is rotatably connected in the detection tube 6, a first rack 18 is fixed to the bottom end of the sealing plate 9, the first rack 18 and the second rack 19 are both meshed and connected with the gear 20, and a warning light 22 electrically connected to the switch 17 is fixed to the top of the box body 1; It should be noted that if the filter element is not blocked, the water pressure entering the detection tube 6 will be greater, so that the sealing plate 9 will move downward a greater distance, and then the sealing plate 9 will drive the gear 20 to rotate through the meshing of the first rack 18, and then the gear 20 will mesh with the second rack 19 to push the contact rod 21 outward, and then the contact rod 21 will contact the switch 17, and then the prompt light 22 will light up. On the contrary, if the filter element is blocked, the contact rod 21 will not contact the switch 17, and the prompt light 22 will not light up. In this way, whether the filter element is qualified can be judged by observing whether the prompt light 22 lights up, making the detection simpler. At the same time, the switch 17 will transmit the signal to the controller 24. After processing the signal, the controller 24 will send a command to the electric push rod 14, and then the electric push rod 14 will retract to release the filter element, thereby making the replacement of the filter element more convenient.

[0026] Furthermore, a controller 24 electrically connected to the switch 17 is fixed to the top of the box 1, and a pressure sensor 23 for detecting the water pressure inside the detection tube 6 is fixed to the top of the detection tube 6, and the pressure sensor 23 is electrically connected to the controller 24; It should be noted that the pressure sensor 23 will detect the water pressure above the retaining ring 8 multiple times within a period of time at the beginning of the detection, and send the data to the controller 24. For a clogged filter element, the water pressure will not reach the set threshold during this period, and then the controller 24 will issue a command to the electric push rod 14, and the electric push rod 14 will retract to loosen the filter element. For an unblocked filter element, the controller 24 will receive data that the water pressure has reached the set threshold during this period. At this time, the controller 24 will not issue a command to the electric push rod 14, but wait for the signal of the switch 17. The switch 17 will transmit the signal to the controller 24. After processing the signal, the controller 24 will issue a command to the electric push rod 14, and then the electric push rod 14 will retract to loosen the filter element. In this way, the electric push rod 14 can automatically loosen both qualified and unqualified filter elements, thereby facilitating the replacement of the filter element.

[0027] Furthermore, a conveying frame 25 for conveying the filter element passing through the upper plate 2 and the lower plate 3 is provided in the box body 1, and both sides of the conveying frame 25 are fixedly connected to the box body 1 through a pair of fixing frames 26, and a notch 27 located between the upper plate 2 and the lower plate 3 is opened in the middle position of the conveying frame 25, and a clamping component is provided at the notch 27, and a pushing component is provided in the conveying frame 25; It should be noted that the conveying rack 25 forms a to-be-detected area and an inspected area on both sides of the notch 27, respectively, and multiple filter elements are neatly stacked in the to-be-detected area in the conveying rack 25. When the electric push rod 14 releases the filter element, the controller 24 will send a command to the pushing component, and the pushing component will push the multiple filter elements along the direction of the conveying rack 25. The filter element in the to-be-detected area will push the filter element in the clamping component to the inspected area until the next filter element enters the clamping component, thereby realizing automatic replacement of the filter element.

[0028] The clamping assembly includes a pair of clamping plates 30 that can hold the filter element, and the two ends of the clamping plates 30 are respectively provided with introduction portions 31 that are arc-directed opposite to the clamping plates 30, and an elastic connection is formed between the clamping plates 30 and the box body 1; It should be noted that when the filter element is subjected to thrust, the two clamps 30 will be stretched open through the introduction part 31 until the filter element enters between the two clamps 30. Under the action of elastic force, the two clamps 30 will embrace the filter element and fix it. Similarly, after the detection is completed, the filter element will be pushed out from between the two clamps 30 and enter the detected area.

[0029] Among them, L-shaped frame plates 28 are fixed to the inner walls of both sides of the box body 1, and an L-shaped sliding rod 29 is inserted on the frame plate 28. One end of the sliding rod 29 is fixedly connected to the clamping plate 30, and a guide rod 32 is inserted on the other end of the sliding rod 29. The end of the guide rod 32 is fixedly connected to the frame plate 28. A second spring 33 is sleeved on the guide rod 32, and the two ends of the second spring 33 are fixedly connected to the frame plate 28 and the sliding rod 29 respectively; It should be noted that, in this way, the elastic force of the second spring 33 can act on the slide bar 29, so that the two clamping plates 30 can hold the filter element together, and the clamping plates 30 can be limited and moved through the cooperation between the slide bar 29 and the frame plate 28.

[0030] The push assembly includes a slide rail 34 fixed to the inner wall of one side of the box body 1, a slider 37 is slidably connected in the slide rail 34, a push plate 15 that can move along the conveying frame 25 is fixed to the inner side of the slider 37, a screw rod 35 is rotatably connected in the slide rail 34, the screw rod 35 and the slider 37 are threadedly connected, a motor 36 is fixed to one end of the slide rail 34, and the output shaft of the motor 36 is fixedly connected to the end of the screw rod 35; It should be noted that after receiving the command from the controller 24 , the motor 36 will drive the screw 35 to rotate, and the rotating screw 35 will drive the slider 37 to move toward the detected area, and then the slider 37 will push the filter elements one by one through the push plate 15 .

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter element detection device that is convenient for replacing detection samples, comprising a housing (1), characterized in that: The box body (1) is provided with an upper plate (2) and a lower plate (3) that can be close to each other. The upper plate (2) and the lower plate (3) are both penetrated and fixed with a butt joint (4). Both butt joints (4) are connected with a hose (5). The upper hose (5) is connected with a water supply mechanism, and the lower hose (5) is connected with a detection tube (6). The bottom end of the detection tube (6) is connected with a drainage pipe (7). The drainage pipe (7) is penetrated and fixed at the bottom of the box body (1). A retaining ring (8) is provided in the detection tube (6). A sealing plate (9) for blocking the retaining ring (8) is provided below the retaining ring (8). A pair of guide pillars (10) are inserted into the sealing plate (9). The top ends of the guide pillars (10) are fixedly connected to the retaining ring (8). A first spring (11) is sleeved on the guide pillars (10). The two ends of the first spring (11) are respectively fixedly connected to the guide pillars (10) and the retaining ring (8).

2. A filter element detection device that is convenient for replacing detection samples according to claim 1, characterized in that: The water supply mechanism comprises a water tank (12) fixed on the top of the box body (1), a water pump (13) is fixed in the water tank (12), and a water outlet end of the water pump (13) is connected to an upper hose (5).

3. A filter element detection device that is convenient for replacing detection samples according to claim 1, characterized in that: Electric push rods (14) are fixed to the opposite sides of the upper plate (2) and the lower plate (3), and the other ends of the two electric push rods (14) are respectively fixedly connected to the top wall and the bottom wall of the box body (1).

4. A filter element detection device that is convenient for replacing detection samples according to claim 3, characterized in that: An extension tube (16) is provided on the side of the detection tube (6), a switch (17) is fixed to the outer end of the extension tube (16), a contact rod (21) is inserted into the extension tube (16), a second rack (19) is fixed to the inner end of the contact rod (21), a gear (20) is rotatably connected inside the detection tube (6), a first rack (18) is fixed to the bottom end of the sealing plate (9), the first rack (18) and the second rack (19) are both meshedly connected to the gear (20), and a warning light (22) electrically connected to the switch (17) is fixed to the top of the box body (1).

5. A filter element detection device that is convenient for replacing detection samples according to claim 4, characterized in that: A controller (24) electrically connected to the switch (17) is fixed at the top of the box (1), and a pressure sensor (23) for detecting the water pressure inside the detection tube (6) is fixed at the top of the detection tube (6). The pressure sensor (23) is electrically connected to the controller (24).

6. A filter element detection device that is convenient for replacing detection samples according to claim 5, characterized in that: The box body (1) is provided with a conveying frame (25) for conveying the filter element and passing through the upper plate (2) and the lower plate (3); two sides of the conveying frame (25) are fixedly connected to the box body (1) via a pair of fixing frames (26); a notch (27) located between the upper plate (2) and the lower plate (3) is provided in the middle of the conveying frame (25); a clamping component is provided at the notch (27); and a pushing component is provided in the conveying frame (25).

7. A filter element detection device for facilitating replacement of detection samples according to claim 6, characterized in that: The clamping assembly comprises a pair of clamping plates (30) capable of embracing the filter element, and both ends of the clamping plates (30) are respectively provided with introduction portions (31) in an arc direction opposite to the clamping plates (30), and an elastic connection is formed between the clamping plates (30) and the box body (1).

8. A filter element detection device for facilitating replacement of detection samples according to claim 7, characterized in that: L-shaped frames (28) are fixed to the inner walls of both sides of the box body (1), an L-shaped slide bar (29) is inserted into the frame plate (28), one end of the slide bar (29) is fixedly connected to the clamping plate (30), a guide bar (32) is inserted into the other end of the slide bar (29), the end of the guide bar (32) is fixedly connected to the frame plate (28), a second spring (33) is sleeved on the guide bar (32), and the two ends of the second spring (33) are fixedly connected to the frame plate (28) and the slide bar (29), respectively.

9. A filter element testing device for facilitating replacement of testing samples according to claim 6, characterized in that: The pushing assembly comprises a slide rail (34) fixed to an inner wall of one side of the box body (1); a slider (37) is slidably connected to the slide rail (34); a push plate (15) capable of moving along the conveying frame (25) is fixed to the inner side of the slider (37); a screw rod (35) is rotatably connected to the slide rail (34); the screw rod (35) and the slider (37) are threadedly connected; a motor (36) is fixed to one end of the slide rail (34); and an output shaft of the motor (36) is fixedly connected to an end of the screw rod (35).

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