Horizontal waste paper hydraulic baler

Abstract

This utility model provides a horizontal waste paper hydraulic baler, relating to the field of baler technology. The utility model includes a base with side sections on both sides and a top plate at the upper end of each side section. The base, the two side sections, and the top plate form a cylindrical frame structure. A feeding component is provided on the top plate. A baling hydraulic cylinder is fixedly installed inside the cylindrical frame structure. A pressing plate is fixedly installed at the output end of the baling hydraulic cylinder. The pressing plate slides along the inner wall of the cylindrical frame structure. An intercepting part is provided on one side of the cylindrical frame structure. When the pressing plate presses the waste paper, the blocking plate moves along the pressing plate and gradually blocks the area below the feeding hopper, preventing the waste paper from falling behind the pressing plate during the pressing process.

Description

Technical Field

[0001] This utility model relates to the field of baling machine technology, and in particular to a horizontal waste paper hydraulic baler. Background Technology

[0002] Existing horizontal waste paper hydraulic balers typically consist of core components such as a frame structure, a feeding device, a hydraulic extrusion mechanism, and an interception mechanism. The general workflow is as follows: waste paper is fed into the frame through the feeding device, and the hydraulically driven extrusion plate squeezes the waste paper towards the interception mechanism, compressing the waste paper into shape and completing the baling process.

[0003] However, the existing equipment has the following problems in actual use: during the extrusion process, waste paper is prone to fall from the feed port to the back of the extrusion plate, affecting the extrusion effect and the normal operation of the equipment. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a horizontal waste paper hydraulic baler.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a horizontal waste paper hydraulic baler, including a base, side portions on both sides of the base, and a top plate at the upper end of the side portions, wherein the base, the two side portions, and the top plate form a cylindrical frame structure, a feeding component is provided on the top plate, a baling hydraulic cylinder is fixedly installed inside the cylindrical frame structure, and a squeezing plate is fixedly installed at the output end of the baling hydraulic cylinder, wherein the squeezing plate slides along the inner wall of the cylindrical frame structure, and an interception part is provided on one side of the cylindrical frame structure, and waste paper enters the interior of the cylindrical frame structure from the feeding component and is squeezed towards the interception part by the squeezing plate.

[0006] The effect achieved by the above components is that a hydraulic station is fixedly installed on the top plate. The hydraulic station is responsible for providing power to the baling hydraulic cylinder and the lifting hydraulic cylinder. When it is necessary to bale waste paper, the waste paper is first put into the feeding component and enters the cylindrical frame structure. Then the baling hydraulic cylinder is activated. The baling hydraulic cylinder extends and slides against the extrusion plate inside the cylindrical frame structure, so that the waste paper is squeezed and compressed between the interception part and the extrusion plate.

[0007] Preferably, the feeding component includes a feeding hopper, which is welded to the top plate and connected to the cylindrical frame structure. A feeding port is provided on one side of the feeding hopper.

[0008] The effect achieved by the above components is that the bucket-shaped feed hopper can hold a large amount of waste paper at once and then slowly feed it into the cylindrical frame structure. The feed inlet is located on the side of the feed hopper near the side. A conveyor belt can be set at the feed inlet to transport the waste paper (the height of the conveyor belt can be reduced due to the feed inlet). Alternatively, the waste paper can be directly gripped by a mechanical claw and thrown into the feed hopper (the setting of the feed inlet can reduce the working height of the mechanical claw, thus making it compatible with smaller instruments).

[0009] Preferably, the side portion includes: a side plate, which serves as a vertical support for the cylindrical frame structure, and the side plate is welded to the top plate and the base respectively;

[0010] Reinforcing ribs are evenly distributed on the surface of the side plate to improve the mechanical strength of the side plate;

[0011] An observation port, located on the side plate, allows access to the interior of the cylindrical frame structure for inspection and maintenance of the packing hydraulic cylinder.

[0012] The aforementioned components enable maintenance and repair of the packing and pressing cylinder by allowing access to the cylindrical frame structure through the observation port.

[0013] Preferably, the side plate has a packing component on its surface, which is a wire-passing groove formed on the side plate.

[0014] The aforementioned components achieve the following effect: when the extrusion plate squeezes the waste paper, the steel pipe passes through the threading groove on one side plate along the surface of the extrusion plate and through the threading groove on the other side plate, then through the packing rope through the steel pipe, pulls out the steel pipe, and passes through the threading groove on one side plate along the surface of the gate and through the threading groove on the other side plate (the above operation is continuously performed for each threading groove). The packing hydraulic cylinder continues to squeeze the waste paper until it can no longer be squeezed, at which point the packing rope is manually tied together to pack the squeezed waste paper.

[0015] Preferably, the interception part includes a gate, wherein the gate slides vertically between two side plates, the upper end of the gate is fixedly connected to a mounting base, and the side of the base is fixedly connected to a lifting hydraulic cylinder, which is detachably installed between the mounting bases by means of a flange.

[0016] The effect achieved by the above-mentioned components is that when the extrusion plate has finished extruding and baling the waste paper, the lifting hydraulic cylinder can be extended by controlling the gate to slide upward to expose the opening of the cylindrical frame structure, thereby pushing out the extruded and baled waste paper.

[0017] Preferably, the surfaces of the extrusion plate and the gate are provided with grooves, wherein the opening of the groove is smaller than the inner cavity of the groove, and the grooves open horizontally from one side plate to the other side plate.

[0018] The effect achieved by the above-mentioned components is that the opening of the groove is smaller than the inner cavity. When squeezing waste paper, the waste paper is not easy to enter the groove because the opening is small. The groove can be easily inserted into the groove, and the opening of the groove can allow the packing rope to pass through. When the gate is lifted, the squeezed waste paper will have a tendency to recover, which will make the packing rope taut on the surface of the waste paper and finally expel it from the cylindrical frame structure.

[0019] Preferably, a blocking part is provided between the extrusion plate and the top plate. When the extrusion plate extrudes the waste paper, the blocking plate moves along the extrusion plate and gradually blocks the bottom of the feed hopper.

[0020] The effect of the above-mentioned components is to prevent waste paper from falling behind the extrusion plate during the extrusion process.

[0021] Preferably, the bottom of the top plate is provided with a track groove, the blocking plate slides on the track groove, and the port of the track groove is provided with an oblique opening.

[0022] The effect achieved by the above-mentioned components is that the blocking part can easily and quickly enter the track groove along the inclined opening.

[0023] Preferably, the blocking part includes a blocking plate, the upper end of which is fixedly connected to a track bar, the track groove being a T-shaped groove, the track bar and the track groove cooperating with each other, a sliding groove being provided below the blocking plate, a slider being slidably assembled inside the sliding groove, a spring being fixedly connected between the slider and the sliding groove, a pressure rod being rotatably connected between the slider and the blocking plate, the two pressure rods being rotatably connected, and an arc-shaped surface being provided at the upper end of the extrusion plate, the two pressure rods arching downwards under normal conditions.

[0024] The effect achieved by the above components is as follows: At this time, the extrusion plate slides along the inside of the cylindrical frame structure. The extrusion plate abuts against one side of the pressure rod. Since the slider is already at the far right of the sliding groove, the extrusion plate drives the blocking plate to slide along the track groove by abutting against the pressure rod. As the extrusion plate gradually moves, the blocking plate gradually blocks the feed hopper. When the blocking plate completely blocks the feed hopper, the track bar moves to the end of the track groove. At this time, the blocking plate can no longer move. Then the extrusion plate will continue to move. At this time, the inclined surface of the extrusion plate abuts against the pressure rod, causing the pressure rod to push the slider to squeeze the spring, making the angle between the two extrusion plates smaller, so that the extrusion plate can continue to squeeze the waste paper through the pressure rod. When the extrusion plate moves back, the extrusion plate abuts against the pressure rod, driving the blocking plate to slide along the track groove. As the extrusion plate gradually moves, the blocking plate gradually protrudes out of the feed hopper. When the feed hopper is completely protruding, the track bar moves to the end of the track groove. At this time, the blocking plate can no longer move. Then the extrusion plate will continue to move. At this time, the inclined surface of the extrusion plate abuts against the pressure rod, causing the pressure rod to push the slider to squeeze the spring, making the angle between the two extrusion plates smaller, so that the extrusion plate can pass through the pressure rod.

[0025] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0026] In this invention, when the extrusion plate extrudes the waste paper, the blocking plate moves along the extrusion plate and gradually blocks the bottom of the feed hopper to prevent the waste paper from falling behind the extrusion plate during the extrusion process. Attached Figure Description

[0027] Figure 1 A three-dimensional structural diagram of a horizontal waste paper hydraulic baler is provided for this utility model;

[0028] Figure 2 This utility model provides a schematic diagram of the discharge state of a horizontal waste paper hydraulic baler;

[0029] Figure 3 This utility model provides a schematic diagram of the side section of a horizontal waste paper hydraulic baler.

[0030] Figure 4 This utility model provides an internal schematic diagram of a horizontal waste paper hydraulic baler;

[0031] Figure 5 This utility model proposes a horizontal waste paper hydraulic baler. Figure 4 Enlarged view of point A;

[0032] Figure 6 This utility model proposes a horizontal waste paper hydraulic baler. Figure 4 Bottom diagram;

[0033] Figure 7 This utility model proposes a horizontal hydraulic baler for waste paper. Figure 6 Schematic diagram of the extended state of the hydraulic cylinder for packaging;

[0034] Figure 8 This utility model provides a vertical cross-sectional view of the blocking part in a horizontal waste paper hydraulic baler.

[0035] Legend: 1. Side; 101. Side plate; 102. Reinforcing rib; 103. Observation port; 2. Top plate; 3. Hydraulic station; 4. Packing hydraulic cylinder; 5. Feed hopper; 6. Interception part; 61. Gate; 62. Mounting seat; 63. Flange; 7. Lifting hydraulic cylinder; 8. Feed port; 9. Packing component; 10. Extrusion plate; 11. Groove; 12. Blocking part; 121. Blocking plate; 122. Track bar; 123. Sliding groove; 124. Spring; 125. Slider; 126. Pressure rod; 13. Track groove; 14. Slanted opening. Detailed Implementation

[0036] Example 1, such as Figure 1-5As shown, a horizontal waste paper hydraulic baler includes a base with side sections 1 on both sides and a top plate 2 at the top of the side sections 1. The base, the two side sections 1, and the top plate 2 form a cylindrical frame structure. A feeding component is mounted on the top plate 2. A baling hydraulic cylinder 4 is fixedly installed inside the cylindrical frame structure. A compression plate 10 is fixedly installed at the output end of the baling hydraulic cylinder 4. The compression plate 10 slides along the inner wall of the cylindrical frame structure. An interception section 6 is provided on one side of the cylindrical frame structure. Waste paper enters the cylindrical frame structure from the feeding component and is squeezed by the compression plate 10 towards the interception section 6. A hydraulic station 3 is fixedly installed on the top plate 2. The hydraulic station 3 provides power to the baling hydraulic cylinder 4 and the lifting hydraulic cylinder 7. When baling waste paper is required, the waste paper is first fed into the feeding component and enters the cylindrical frame structure. Then, the baling hydraulic cylinder 4 is activated, extending and sliding against the compression plate 10 inside the cylindrical frame structure. Waste paper is squeezed and compressed between the interception section 6 and the extrusion plate 10. The feeding component includes a feeding hopper 5, which is welded to the top plate 2 and connected to the cylindrical frame structure. A feeding port 8 is provided on one side of the feeding hopper 5. The hopper-shaped feeding hopper 5 can hold a large amount of waste paper at once and then slowly feed it into the cylindrical frame structure. The feeding port 8 is located on the side of the feeding hopper 5 near the side 1. A conveyor belt can be set at the feeding port 8 to transport waste paper (the height of the conveyor belt can be reduced due to the feeding port 8). Alternatively, waste paper can be directly gripped by a mechanical claw and thrown into the feeding hopper 5 (the setting of the feeding port 8 can reduce the working height of the mechanical claw, thus making it compatible with small instruments). The side 1 includes: a side plate 101, which serves as a vertical support for the cylindrical frame structure. The side plate 101 is welded to the top plate 2 and the base respectively; and reinforcing ribs 102, which are evenly distributed on the surface of the side plate 101 to improve the mechanical strength of the side plate 101.Observation port 103 is located on side plate 101, allowing access to the cylindrical frame structure for inspection and maintenance of the packing hydraulic cylinder 4. When maintenance of the packing hydraulic cylinder is required, access to the cylindrical frame structure via observation port 103 is possible. A packing component 9, which is a wire-passing groove, is provided on the surface of side plate 101. When the extrusion plate 10 extrudes waste paper, a steel pipe passes through the wire-passing groove on one side of side plate 101 along the extrusion plate. The surface of the paper 10 passes through the threading groove on the other side plate 101, then through the steel pipe and the packing rope. The steel pipe is pulled out and passes through the threading groove on one side plate 101 along the surface of the gate 61 to the threading groove on the other side plate 101 (the above operation is repeated for each threading groove). The packing hydraulic cylinder 4 continues to squeeze the waste paper until it can no longer be squeezed. The packing rope is then manually tied together to pack the squeezed waste paper. The interception part 6 includes a gate 61, wherein the gate 61 is on both sides. The plates 101 slide vertically between each other. A mounting base 62 is fixedly connected to the upper end of the gate 61, and a lifting hydraulic cylinder 7 is fixedly connected to the side of the base. The lifting hydraulic cylinder 7 is detachably installed between the mounting bases 62 via a flange 63. When the squeezing plate 10 finishes squeezing and baling the waste paper, the lifting hydraulic cylinder 7 can be controlled to extend, and then the gate 61 slides upward to expose the opening of the cylindrical frame structure, thus pushing out the squeezed and baleped waste paper. Grooves 11 are provided on the surfaces of the squeezing plate 10 and the gate 61. The opening of the groove 11 is smaller than the inner cavity of the groove. The groove 11 extends horizontally from one side plate 101 to the other side plate 101. Because the opening of the groove 11 is smaller than the inner cavity, the waste paper is less likely to enter the groove 11 when squeezing. The groove 11 allows steel pipes to be easily inserted into it, and the opening of the groove 11 allows the baling rope to pass through. When the gate 61 is lifted, the squeezed waste paper tends to recover, thus tautling the baling rope on the surface of the waste paper, and finally expelling it from the cylindrical frame structure.

[0037] Working principle: A hydraulic station 3 is fixedly installed on the top plate 2. The hydraulic station 3 provides power to the baling hydraulic cylinder 4 and the lifting hydraulic cylinder 7. When waste paper needs to be baled, the waste paper is first put into the feeding part and enters the cylindrical frame structure. Then, the baling hydraulic cylinder 4 is activated. The baling hydraulic cylinder 4 extends and slides against the extrusion plate 10 inside the cylindrical frame structure, so that the waste paper is squeezed and compressed between the interception part 6 and the extrusion plate 10. The bucket-shaped feeding hopper 5 can hold a large amount of waste paper at a time and then slowly feed it into the cylindrical frame structure. The feeding port 8 is located on the side of the feeding hopper 5 near the side part 1. A conveyor belt can be set at the feeding port 8 to transport waste paper (the height of the conveyor belt can be reduced due to the feeding port 8). Alternatively, the waste paper can be directly dropped into the feeding hopper 5 by a mechanical claw (the setting of the feeding port 8 can reduce the working height of the mechanical claw, thus making it compatible with small instruments). When the extrusion plate 10 squeezes the waste paper, it passes through a steel pipe from the wire groove on one side plate 101 along the surface of the extrusion plate 10 to the other side plate. The paper passes through the threading groove on 101, then through the steel pipe and the packing rope. The steel pipe is pulled out and passes through the threading groove on one side plate 101 along the surface of the gate 61 and through the threading groove on the other side plate 101 (the above operation is repeated for each threading groove). The packing hydraulic cylinder 4 continues to squeeze the waste paper until it can no longer be squeezed. The packing rope is then tied together manually to pack the squeezed waste paper. When the squeezing plate 10 has finished squeezing and packing the waste paper, the lifting hydraulic cylinder 7 can be extended by controlling it. Then the gate 61 slides upward to expose the opening of the cylindrical frame structure, thereby pushing out the squeezed and packed waste paper. The opening of the groove 11 is smaller than the inner cavity. When squeezing the waste paper, the waste paper is not easy to enter the groove 11 because the opening is small. The groove 11 is designed to facilitate the insertion of the steel pipe from inside the groove 11, and the opening of the groove 11 allows the packing rope to pass through. When the gate 61 is lifted, the squeezed waste paper will have a tendency to recover, thus making the packing rope taut on the surface of the waste paper and finally being discharged from the cylindrical frame structure.

[0038] Example 2, as Figure 6-8As shown, a blocking part 12 is provided between the extrusion plate 10 and the top plate 2. When the extrusion plate 10 extrudes waste paper, the blocking plate 121 moves along the extrusion plate 10 and gradually blocks the bottom of the feed hopper 5 to prevent waste paper from falling behind the extrusion plate 10 during the extrusion process. A track groove 13 is provided at the bottom of the top plate 2, and the blocking plate 121 slides on the track groove 13. The end of the track groove 13 is provided with an inclined opening 14, and the blocking part 12 can easily and quickly enter the track groove 13 along the inclined opening 14. The blocking part 12 includes a blocking plate 121, and a track bar 122 is fixedly connected to the upper end of the blocking plate 121. The track groove 13 is a T-shaped groove. The track bar 122 and the track groove 13 are fitted together. A sliding groove 123 is provided below the blocking plate 121. A slider 125 is slidably assembled inside the sliding groove 123. A spring 124 is fixedly connected between the slider 125 and the sliding groove 123. A pressure rod 126 is rotatably connected between the slider 125 and the blocking plate 121. The two pressure rods 126 are rotatably connected. The upper end of the extrusion plate 10 is provided with an arc-shaped surface. Under normal conditions, the two pressure rods 126 arch downwards. At this time, the extrusion plate 10 slides along the inside of the cylindrical frame structure. The extrusion plate 10 abuts against one side of the pressure rod 126. Since the slider 125 has already abutted against the pressure rod 126 at this time... At the far right of the sliding groove 123, the extrusion plate 10, by abutting against the pressure rod 126, drives the blocking plate 121 to slide along the track groove 13. As the extrusion plate 10 gradually moves, the blocking plate 121 gradually blocks the feed hopper 5. When the blocking plate 121 completely blocks the feed hopper 5, the track bar 122 moves to the end of the track groove 13. At this time, the blocking plate 121 can no longer move. Then the extrusion plate 10 will continue to move. At this time, the inclined surface of the extrusion plate 10 abuts against the pressure rod 126, causing the pressure rod 126 to push the slider 125 to compress the spring 124, making the included angle between the two extrusion plates 10 smaller, so that the extrusion plate 10 continues to move through the pressure rod 126. As the waste paper continues to be squeezed, when the squeezing plate 10 moves back, it pushes against the pressure rod 126, causing the blocking plate 121 to slide along the track groove 13. As the squeezing plate 10 gradually moves, the blocking plate 121 gradually leaks out of the feed hopper 5. When the feed hopper 5 is completely leaked out, the track bar 122 moves to the end of the track groove 13. At this time, the blocking plate 121 can no longer move. Then the squeezing plate 10 will continue to move. At this time, the inclined surface of the squeezing plate 10 pushes against the pressure rod 126, causing the pressure rod 126 to push the slider 125 to squeeze the spring 124, making the included angle between the two squeezing plates 10 smaller, so that the squeezing plate 10 passes through the pressure rod 126.

[0039] Working principle: The extrusion plate 10 slides along the inside of the cylindrical frame structure. The extrusion plate 10 abuts against the pressure rod 126 on one side. Since the slider 125 is already at the rightmost side of the sliding groove 123, the extrusion plate 10, by abutting against the pressure rod 126, drives the blocking plate 121 to slide along the track groove 13. As the extrusion plate 10 gradually moves, the blocking plate 121 gradually blocks the feed hopper 5. When the blocking plate 121 completely blocks the feed hopper 5, the track bar 122 moves to the end of the track groove 13. At this point, the blocking plate 121 cannot move further. Then, the extrusion plate 10 continues to move. At this time, the inclined surface of the extrusion plate 10 presses against the pressure rod 126, causing the pressure rod 126 to push the slider 125 to compress the spring 124, reducing the angle between the two extrusion plates 10 and thus extruding... The pressure plate 10 continues to squeeze the waste paper through the pressure rod 126. When the pressure plate 10 moves back, it pushes against the pressure rod 126 and drives the blocking plate 121 to slide along the track groove 13. As the pressure plate 10 moves gradually, the blocking plate 121 gradually leaks out of the feed hopper 5. When the feed hopper 5 is completely leaked out, the track bar 122 moves to the end of the track groove 13. At this time, the blocking plate 121 can no longer move. Then the pressure plate 10 will continue to move. At this time, the inclined surface of the pressure plate 10 pushes against the pressure rod 126, causing the pressure rod 126 to push the slider 125 to squeeze the spring 124, making the included angle between the two pressure plates 10 smaller, so that the pressure plate 10 passes through the pressure rod 126. The blocking part 12 can easily and quickly enter the track groove 13 along the inclined opening 14.

[0040] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. A horizontal waste paper hydraulic baler characterized in that: The device includes a base, with side portions (1) on both sides of the base and a top plate (2) on the upper end of the side portions (1). The base, the two side portions (1), and the top plate (2) form a cylindrical frame structure. A feeding component is provided on the top plate (2). A packing hydraulic cylinder (4) is fixedly installed inside the cylindrical frame structure. A pressing plate (10) is fixedly installed at the output end of the packing hydraulic cylinder (4). The pressing plate (10) slides along the inner wall of the cylindrical frame structure. An intercepting part (6) is provided on one side of the cylindrical frame structure. Waste paper enters the cylindrical frame structure from the feeding component and is pressed by the pressing plate (10) toward the intercepting part (6).

2. The horizontal waste paper hydraulic baler according to claim 1, characterized in that: The feeding component includes a feeding hopper (5), which is welded to the top plate (2) and is connected to the cylindrical frame structure. A feeding port (8) is provided on one side of the feeding hopper (5).

3. A horizontal waste paper hydraulic baling press according to claim 1 or 2, characterized in that: The side part (1) includes: a side plate (101), which serves as a vertical support for the cylindrical frame structure, and the side plate (101) is welded to the top plate (2) and the base respectively; Reinforcing ribs (102) are uniformly disposed on the surface of the side plate (101) to improve the mechanical strength of the side plate (101); The observation port (103) is located on the side plate (101) and can be used to access the inside of the cylindrical frame structure to inspect and pack the hydraulic cylinder (4).

4. The horizontal waste paper hydraulic baler according to claim 3, characterized in that: The side plate (101) has a packaging component (9) on its surface, which is a wire groove on the side plate (101).

5. The horizontal waste paper hydraulic baler according to claim 4, characterized in that: The interception part (6) includes a gate (61), which slides vertically between two side plates (101). The upper end of the gate (61) is fixedly connected to a mounting base (62), and the side of the base is fixedly connected to a lifting hydraulic cylinder (7). The lifting hydraulic cylinder (7) is detachably installed between the mounting bases (62) by means of a flange (63).

6. The horizontal waste paper hydraulic baler according to claim 5, characterized in that: The surfaces of the extrusion plate (10) and the gate (61) are provided with grooves (11), wherein the opening of the groove (11) is smaller than the inner cavity of the groove, and the groove (11) is horizontally opened from one side plate (101) to the other side plate (101).

7. The horizontal waste paper hydraulic baler according to claim 6, characterized in that: A blocking part (12) is provided between the extrusion plate (10) and the top plate (2). When the extrusion plate (10) extrudes waste paper, the blocking part (12) moves along the extrusion plate and gradually blocks the bottom of the feed hopper (5).

8. The horizontal waste paper hydraulic baler according to claim 7, characterized in that: The bottom of the top plate (2) is provided with a track groove (13), the blocking part (12) slides on the track groove (13), and the port of the track groove (13) is provided with an oblique opening (14).

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