A canal irrigation canal valve

Abstract

The present invention is realized through the following technical scheme: a canal irrigation channel valve, including a valve plate, the bottom of the valve plate is rotatably set on the bottom plate, the bottom plate is fixed on the bottom of the canal channel, and a water pipe is arranged through the valve plate; a cross seat, the cross seat and the valve plate are detachably connected, and columns are arranged on both sides of the cross seat and the valve plate; a sealing blocking member, the sealing blocking member moves to block or open the water pipe; the sealing blocking member includes a sealing part, a water flow regulating part and a connecting rope. The advantage of the present invention is that a water pipe is arranged on the valve plate, a sealing part is arranged at the position of the water pipe, the opening and closing of the water pipe is controlled by the sealing part, the sealing part is connected to the water flow regulating part by a connecting rope, and the water flow rate in the water pipe can be further adjusted by the water flow regulating part, so as to adjust the appropriate water flow rate, so that it has a wider range of application.

Description

Technical Field

[0001] The invention relates to the technical field of canal irrigation equipment, in particular to a canal irrigation channel valve. Background Art

[0002] Canal irrigation refers to the channel used to divert water to irrigate the fields. Irrigation is carried out through the canal to add water to the fields.

[0003] However, in actual application, existing canal irrigation channel valves use soil stacks or plates as valves. When irrigation is needed, the valve needs to be opened. This valve opening method will open all the water flow outlets at once and cannot adjust the flow, which limits the actual scope of application. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a canal irrigation outlet valve.

[0005] The technical solution of the present invention is as follows: a canal irrigation canal valve, comprising

[0006] A valve plate, the bottom of which is rotatably arranged on a bottom plate, the bottom plate is fixed to the bottom of the water channel, and a water pipe is arranged through the valve plate;

[0007] A horizontal seat, wherein the horizontal seat and the valve plate are detachably connected, and columns are provided on both sides of the horizontal seat and the valve plate;

[0008] A sealing blocking member, wherein the sealing blocking member moves to block or open the water pipe;

[0009] The sealing barrier comprises a sealing portion, a water flow regulating portion and a connecting rope, wherein the sealing portion is arranged on the water inlet side of the valve plate, the water flow regulating portion is located on the water outlet side of the valve plate, the sealing portion and the water flow regulating portion are connected by a connecting rope, and the connecting rope is located inside the water pipe.

[0010] Preferably, the sealing portion includes a first rubber cylindrical portion and a first rubber frustum portion, the first rubber frustum portion is fixed to one end of the first rubber cylindrical portion, and the diameter of the first rubber cylindrical portion is greater than the diameter of the water pipe.

[0011] Preferably, the water flow regulating part comprises a second rubber truncated cone part and a second rubber cylindrical part, the second rubber truncated cone part is fixed to one end of the second rubber cylindrical part, and the diameter of the second rubber cylindrical part is larger than the diameter of the water pipe;

[0012] When the second rubber truncated cone portion is located inside the water pipe and the second rubber cylindrical portion is located outside the water pipe, the gap between the second rubber truncated cone portion and the water pipe is smaller than the longitudinal cross-sectional area of ​​the water pipe, thereby reducing the water flow discharged from the water pipe;

[0013] When the second rubber cylindrical portion contacts the water pipe, the water pipe is blocked.

[0014] Preferably, the water flow regulating portion is configured as a conical portion, and the maximum diameter of the conical portion is smaller than the diameter of the water pipe;

[0015] When the conical portion is located inside the water pipe, the gap between the conical portion and the water pipe is smaller than the longitudinal cross-sectional area of ​​the water pipe, thereby reducing the water flow discharged from the water pipe.

[0016] Preferably, a grid plate is fixed on the connecting rope, and the grid plate is located inside the water pipe.

[0017] Preferably, a blocking plate is provided on one side of the valve plate, the sealing blocking member is fixed on the blocking plate, a triangular sliding block is fixed on the top of the blocking plate, the triangular sliding block is slidably set on a cross seat, and a driving mechanism for driving the triangular sliding block to move is provided on the cross seat.

[0018] Preferably, the driving mechanism includes a motor, a threaded rod and a fixed bearing. The motor is fixed on the top of the cross seat. The motor is transmission-connected to one end of the threaded rod. A fixed bearing connected to the other end of the threaded rod is provided on the cross seat. The threaded rod is penetrated and arranged in a triangular sliding block. The threaded rod and the triangular sliding block are threadedly connected.

[0019] Preferably, a guide member for guiding the movement of the bottom end of the blocking plate is fixed at one end of the cross seat, and the guide member includes a right-angle fixed rod, a sliding guide rod and an arc-shaped blocking block. The right-angle fixed rod is fixed on the cross seat, and a sliding guide rod is vertically fixed to the bottom end of the right-angle fixed rod. A sliding sleeve is sleeved on the sliding guide rod, and the sliding sleeve is fixed to the bottom of the blocking plate. An arc-shaped blocking block is fixed to the end of the sliding guide rod.

[0020] Preferably, the upright column and the horizontal seat are connected by bolts, and the horizontal seat and the valve plate are connected by bolts;

[0021] When the bolts between the upright column and the horizontal seat are removed and the bolts between the horizontal seat and the valve plate are fixed, the valve plate and the blocking plate rotate as a whole to completely open the water channel.

[0022] Preferably, the upright column and the horizontal seat are connected by bolts, and the horizontal seat and the valve plate are connected by bolts;

[0023] When the bolts between the upright column and the horizontal seat are fixed, and the bolts between the horizontal seat and the valve plate are removed, the valve plate rotates, the blocking plate remains in position, and the water channel is partially opened.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. A water pipe is provided on the valve plate, and a sealing part is provided at the position of the water pipe. The opening and closing of the water pipe is controlled by the sealing part. The sealing part is connected to a water flow regulating part through a connecting rope. The water flow regulating part can further adjust the water flow in the water pipe, thereby adjusting the appropriate water flow, making it more applicable and having better practical application effects;

[0026] 2. On the one hand, the valve plate and the blocking plate can rotate around the bottom plate as a whole, thereby completely opening the water channel and maximizing the water flow of the water channel. On the other hand, the position of the blocking plate remains unchanged, and the valve plate rotates around the bottom plate, which can increase the water flow of the water channel, but will not reach the maximum state. In this way, its application scope can be further improved;

[0027] 3. The overall structure is stable, and the water flow regulation effect is better. The overall structure will not produce positional deviation during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components. Among them:

[0029] Figure 1 This is a schematic structural diagram of a sealing barrier member blocking a water pipe in accordance with Embodiment 1 of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the sealing barrier of Example 1 of the present invention when the water pipe is opened;

[0031] Figure 3 This is a schematic structural diagram of a sealing barrier member blocking a water pipe according to Embodiment 2 of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the sealing barrier of Example 2 of the present invention when the water pipe is opened;

[0033] Figure 5 A top view of a valve for irrigation canal of the present invention;

[0034] Figure 6 It is a schematic structural diagram of the sealing barrier of the present invention;

[0035] Figure 7 This is a schematic structural diagram of a water flow regulating unit according to Embodiment 1 of the present invention;

[0036] Figure 8 This is a schematic structural diagram of a water flow regulating unit according to Embodiment 2 of the present invention;

[0037] Fig. 9 It is a structural schematic diagram of the blocking plate of the present invention;

[0038] Fig.10 It is a structural schematic diagram of the driving mechanism of the present invention;

[0039] Fig.11 It is a structural schematic diagram of the guide member of the present invention;

[0040] Fig.12 This is a schematic diagram of the structure when the valve plate and the blocking plate of Example 1 of the present invention are both opened;

[0041] Fig.13 This is a structural schematic diagram of Example 2 of the present invention when the blocking plate remains in position and the valve plate is fully opened.

[0042] Explanations in the figure: 10, water channel; 20, bottom plate; 30, column; 40, cross seat; 41, guide member; 411, right-angle fixed rod; 412, sliding guide rod; 413, arc-shaped blocking block; 50, water pipe; 60, valve plate; 70, blocking plate; 71, triangular sliding block; 72, sliding sleeve; 80, sealing blocking member; 81, sealing part; 811, first rubber cylindrical part; 812, first rubber frustum part; 82, water flow regulating part; 821, second rubber frustum part; 822, second rubber cylindrical part; 8201, conical part; 83, connecting rope; 831, grid disk; 90, driving mechanism; 91, motor; 92, threaded rod; 93, fixed bearing. DETAILED DESCRIPTION

[0043] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention. Example 1

[0044] like Figure 1-3 As shown, a canal irrigation canal valve comprises

[0045] The valve plate 60 is rotatably arranged at the bottom of the bottom plate 20. A rotation shaft is arranged between the bottom plate 20 and the valve plate 60. The rotation between the bottom plate 20 and the valve plate 60 is maintained by the rotation shaft. The bottom plate 20 is fixed at the bottom of the water channel 10. A water pipe 50 is arranged through the valve plate 60. The water channel 10 is cut off by the valve plate 60. The water pipe 50 is arranged so that when the valve plate 60 blocks the water in the water channel 10, the water can be transported at a small flow rate.

[0046] A cross seat 40, the cross seat 40 and the valve plate 60 are detachably connected, and columns 30 are provided on both sides of the cross seat 40 and the valve plate 60;

[0047] The sealing blocking member 80 is moved to block or open the water pipe 50;

[0048] like Figure 6 As shown, the sealing blocking member 80 includes a sealing portion 81, a water flow regulating portion 82 and a connecting rope 83. The sealing portion 81 is arranged on the water inlet side of the valve plate 60, and the water flow regulating portion 82 is located on the water outlet side of the valve plate 60. The sealing portion 81 and the water flow regulating portion 82 are connected by a connecting rope 83, and the connecting rope 83 is located inside the water pipe 50.

[0049] By setting the sealing part 81, the water inlet side of the water pipe 50 on the valve plate 60 is blocked. When water is not needed, the water pipe 50 can be blocked for a long time by the sealing part 81.

[0050] The sealing part 81 and the water flow regulating part 82 are connected by a connecting rope 83, so that the connection position of the water flow regulating part 82 can be more stable;

[0051] By setting the water flow regulating part 82, the water flow discharged from the water pipe 50 is further regulated. At the same time, the water flow regulating part 82 can also block the water discharged from the water pipe 50, and the concentrated discharged water is quickly diffused to the surroundings, reducing the impact of the water flow on the canal.

[0052] like Figure 7 As shown, the sealing portion 81 includes a first rubber cylindrical portion 811 and a first rubber frustum portion 812 . The first rubber frustum portion 812 is fixed to one end of the first rubber cylindrical portion 811 . The diameter of the first rubber cylindrical portion 811 is greater than the diameter of the water pipe 50 .

[0053] By setting the first rubber frustum 812 , when the first rubber cylinder 811 blocks the water pipe 50 , the first rubber cylinder 811 can be quickly positioned so that the first rubber cylinder 811 is quickly located at the water pipe 50 , thereby blocking the water pipe 50 .

[0054] like Figure 7 As shown, the water flow regulating part 82 includes a second rubber truncated cone part 821 and a second rubber cylindrical part 822. The second rubber truncated cone part 821 is fixed to one end of the second rubber cylindrical part 822. The diameter of the second rubber cylindrical part 822 is larger than the diameter of the water pipe 50.

[0055] When the second rubber truncated cone 821 is located inside the water pipe 50 and the second rubber cylindrical portion 822 is located outside the water pipe 50, the gap between the second rubber truncated cone 821 and the water pipe 50 is smaller than the longitudinal cross-sectional area of ​​the water pipe 50, thereby reducing the water flow discharged from the water pipe 50.

[0056] When the second rubber cylindrical portion 822 contacts the water pipe 50 , the water pipe 50 is blocked. When the second rubber truncated cone portion 821 is located at the water pipe 50 , the water flow rate of the water pipe 50 can be adjusted.

[0057] like Fig.12 As shown, the column 30 and the cross seat 40 are connected by bolts, and the cross seat 40 and the valve plate 60 are connected by bolts;

[0058] When the bolts between the column 30 and the cross seat 40 are removed and the bolts between the cross seat 40 and the valve plate 60 are fixed, the valve plate 60 and the blocking plate 70 rotate as a whole to completely open the water channel 10. Through this structural setting, the cross seat 40, the blocking plate 70 and the valve plate 60 can be completely connected into one body. The bolts between the column 30 and the cross seat 40 are opened, so that the cross seat 40, the blocking plate 70 and the valve plate 60 are connected as a whole and the water in the water channel 10 is transported to the maximum extent. Example 2

[0059] like Figure 1-3 As shown, a canal irrigation canal valve comprises

[0060] The valve plate 60, the bottom of the valve plate 60 is rotatably arranged on the bottom plate 20, the bottom plate 20 is fixed to the bottom of the water channel 10, and the valve plate 60 is penetrated by a water pipe 50;

[0061] A cross seat 40, the cross seat 40 and the valve plate 60 are detachably connected, and columns 30 are provided on both sides of the cross seat 40 and the valve plate 60;

[0062] The sealing blocking member 80 is moved to block or open the water pipe 50;

[0063] like Figure 6 As shown, the sealing blocking member 80 includes a sealing portion 81, a water flow regulating portion 82 and a connecting rope 83. The sealing portion 81 is arranged on the water inlet side of the valve plate 60, and the water flow regulating portion 82 is located on the water outlet side of the valve plate 60. The sealing portion 81 and the water flow regulating portion 82 are connected by a connecting rope 83, and the connecting rope 83 is located inside the water pipe 50.

[0064] like Figure 8As shown, the sealing portion 81 includes a first rubber cylindrical portion 811 and a first rubber frustum portion 812 . The first rubber frustum portion 812 is fixed to one end of the first rubber cylindrical portion 811 . The diameter of the first rubber cylindrical portion 811 is greater than the diameter of the water pipe 50 .

[0065] Specifically, after the sealing portion 81 moves, the sealing portion 81 moves out from the water pipe 50, and the connecting rope 83 pulls the conical portion 8201 to move, so that the conical portion 8201 enters the water pipe 50, thereby changing the water channel space in the water pipe 50, and further adjusting the water flow through the water pipe 50, thereby adjusting more different water flow rates, making it more applicable.

[0066] like Figure 8 As shown, the water flow regulating portion 82 is configured as a conical portion 8201, and the maximum diameter of the conical portion 8201 is smaller than the diameter of the water pipe 50;

[0067] When the conical portion 8201 is located inside the water pipe 50 , the gap between the conical portion 8201 and the water pipe 50 is smaller than the longitudinal cross-sectional area of ​​the water pipe 50 , thereby reducing the water flow discharged from the water pipe 50 .

[0068] By setting the cone portion 8201, when water flows through the water pipe 50, the water flows around the cone portion 8201. On the one hand, the outflowing water can be quickly diffused, and on the other hand, the position of the cone portion 8201 can be kept stable, resulting in better practical application effects.

[0069] like Fig.13 As shown, the column 30 and the cross seat 40 are connected by bolts, and the cross seat 40 and the valve plate 60 are connected by bolts;

[0070] When the bolts between the upright column 30 and the horizontal seat 40 are fixed, and the bolts between the horizontal seat 40 and the valve plate 60 are removed, the valve plate 60 rotates, the blocking plate 70 remains in position, and the water channel 10 is partially opened.

[0071] The width of the baffle plate 70 is smaller than the width of the water channel 10. When the baffle plate 70 is placed in the same position and the valve plate 60 is tilted, the water flow of the water channel 10 can be increased, but it will not reach the maximum level. According to actual needs, the appropriate water flow rate is selected to irrigate the field. Example 3

[0072] On the basis of Example 1 or Example 2, Figure 7-8As shown, a grid plate 831 is fixed on the connecting rope 83, and the grid plate 831 is located inside the water pipe 50. Through the setting of the grid plate 831, on the one hand, the attachments inside the water pipe 50 can be scraped to avoid blockage inside the water pipe 50, and on the other hand, the water flow passing through the water pipe 50 can be stabilized, making the water flow through the water pipe 50 more stable. Example 4

[0073] On the basis of Example 3, Figure 9-10 As shown, a blocking plate 70 is provided on one side of the valve plate 60, a sealing blocking member 80 is fixed on the blocking plate 70, a triangular sliding block 71 is fixed on the top of the blocking plate 70, the triangular sliding block 71 is slidably set on the cross seat 40, and a driving mechanism 90 for driving the triangular sliding block 71 to move is provided on the cross seat 40.

[0074] like Fig.10 As shown, the driving mechanism 90 includes a motor 91, a threaded rod 92 and a fixed bearing 93. The motor 91 is fixed on the top of the cross seat 40. The motor 91 is connected to one end of the threaded rod 92 for transmission. The cross seat 40 is provided with a fixed bearing 93 connected to the other end of the threaded rod 92. The threaded rod 92 is penetrated and set in the triangular sliding block 71. The threaded rod 92 and the triangular sliding block 71 are threadedly connected.

[0075] A strip-shaped through hole is provided on the horizontal seat 40 for the triangular sliding block 71 to slide. The motor 91 works to drive the threaded rod 92 to rotate, so that the triangular sliding block 71 connected to the threaded rod 92 moves along the threaded rod 92, thereby driving the blocking plate 70 to move, thereby controlling the sealing blocking member 80 on the blocking plate 70 to move accordingly, thereby controlling whether the water flows through the water pipe 50.

[0076] like Fig.11 As shown, a guide member 41 for guiding the movement of the bottom end of the blocking plate 70 is fixed at one end of the cross seat 40, and the guide member 41 includes a right-angle fixed rod 411, a sliding guide rod 412 and an arc-shaped blocking block 413. The right-angle fixed rod 411 is fixed on the cross seat 40, and a sliding guide rod 412 is vertically fixed to the bottom end of the right-angle fixed rod 411. A sliding sleeve 72 is sleeved on the sliding guide rod 412, and the sliding sleeve 72 is fixed to the bottom of the blocking plate 70. An arc-shaped blocking block 413 is fixed to the end of the sliding guide rod 412.

[0077] By setting the guide member 41, the movement process of the blocking plate 70 can be smoother when the blocking plate 70 moves. During the movement, no positional offset will occur, and the actual reference effect is better. At the same time, this structural setting will not affect the rotation of the blocking plate 70 and the valve plate 60.

[0078] When in use, when the valve plate 60 and the blocking plate 70 are both vertically arranged at the bottom of the bottom plate 20, by moving the blocking plate 70, the sealing blocking member 80 on the blocking plate 70 is controlled to move, when the sealing portion 81 is separated from the water pipe 50 and the water flow regulating portion 82 has not yet entered the water pipe 50, the maximum water flow of the water pipe 50 can be maintained;

[0079] The blocking plate 70 continues to move, driving the water flow regulating part 82 to continue to move. When part of the water flow regulating part 82 is located inside the water pipe 50, the water flow rate of the water pipe 50 can be reduced.

[0080] When the position of the horizontal seat 40 is fixed, the valve plate 60 is separated from the horizontal seat 40, so that the valve plate 60 rotates around the bottom plate 20, the valve plate 60 is fully opened, and the blocking plate 70 is still in the original position, so that the water flow of the water channel 10 is further increased;

[0081] When the position between the horizontal seat 40 and the column 30 is separated, the position between the valve plate 60 and the horizontal seat 40 is fixed, and the bottom of the valve plate 60 rotates around the bottom plate 20, so that the valve plate 60 and the blocking plate 70 are fully opened, so that the water flow of the water channel 10 reaches the maximum;

[0082] The user can select the appropriate water flow rate according to actual needs. Through this structural setting, the application range of the canal irrigation channel valve is wider and the actual application effect is better.

[0083] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A canal irrigation canal valve, characterized in that: include A valve plate (60), the bottom of the valve plate (60) being rotatably disposed on a bottom plate (20), the bottom plate (20) being fixed to the bottom of the water channel (10), and a water pipe (50) being provided through the valve plate (60); A horizontal seat (40), wherein the horizontal seat (40) and the valve plate (60) are detachably connected, and vertical columns (30) are provided on both sides of the horizontal seat (40) and the valve plate (60); A sealing blocking member (80), wherein the sealing blocking member (80) is movable relative to the water passage (50) to block or open the water passage (50); The sealing blocking member (80) comprises a sealing portion (81), a water flow regulating portion (82) and a connecting rope (83); the sealing portion (81) is arranged on the water inlet side of the valve plate (60); the water flow regulating portion (82) is located on the water outlet side of the valve plate (60); the sealing portion (81) and the water flow regulating portion (82) are connected via a connecting rope (83); and the connecting rope (83) is located inside the water pipe (50); The sealing portion (81) comprises a first rubber cylindrical portion (811) and a first rubber truncated cone portion (812); the first rubber truncated cone portion (812) is fixed to one end of the first rubber cylindrical portion (811); the diameter of the first rubber cylindrical portion (811) is greater than the diameter of the water pipe (50); The water flow regulating portion (82) comprises a second rubber truncated cone portion (821) and a second rubber cylindrical portion (822), the second rubber truncated cone portion (821) being fixed to one end of the second rubber cylindrical portion (822), and the diameter of the second rubber cylindrical portion (822) being greater than the diameter of the water pipe (50); When the second rubber truncated cone portion (821) is located inside the water pipe (50) and the second rubber cylindrical portion (822) is located outside the water pipe (50), the gap between the second rubber truncated cone portion (821) and the water pipe (50) is smaller than the longitudinal cross-sectional area of ​​the water pipe (50), thereby reducing the water flow discharged from the water pipe (50); When the second rubber cylindrical portion (822) contacts the water pipe (50), the water pipe (50) is blocked; Or the water flow regulating portion (82) is configured as a conical portion (8201), and the maximum diameter of the conical portion (8201) is smaller than the diameter of the water passage pipe (50); When the conical portion (8201) is located inside the water pipe (50), the gap between the conical portion (8201) and the water pipe (50) is smaller than the longitudinal cross-sectional area of ​​the water pipe (50), thereby reducing the water flow discharged from the water pipe (50); A blocking plate (70) is provided on one side of the valve plate (60); a sealing portion (81) in the sealing blocking member (80) is fixed on the blocking plate (70); a triangular sliding block (71) is fixed on the top of the blocking plate (70); the triangular sliding block (71) is slidably arranged on a horizontal seat (40); and a driving mechanism (90) for driving the triangular sliding block (71) to move is provided on the horizontal seat (40); The driving mechanism (90) comprises a motor (91), a threaded rod (92) and a fixed bearing (93); the motor (91) is fixed on the top of the cross seat (40); the motor (91) is drivingly connected to one end of the threaded rod (92); the cross seat (40) is provided with a fixed bearing (93) connected to the other end of the threaded rod (92); the threaded rod (92) is arranged to penetrate the triangular sliding block (71); the threaded rod (92) and the triangular sliding block (71) are threadedly connected; The upright column (30) and the cross seat (40) are connected by bolts, and the cross seat (40) and the valve plate (60) are connected by bolts; When the bolts between the upright column (30) and the horizontal seat (40) are removed and the bolts between the horizontal seat (40) and the valve plate (60) are fixed, the valve plate (60) and the blocking plate (70) rotate as a whole to completely open the water channel (10); When the bolts between the upright column (30) and the cross seat (40) are fixed, and the bolts between the cross seat (40) and the valve plate (60) are removed, the valve plate (60) rotates, the blocking plate (70) remains in position, and the water channel (10) is partially opened.

2. A canal irrigation outlet valve according to claim 1, characterized in that: A grid plate (831) is fixed on the connecting rope (83), and the grid plate (831) is located inside the water pipe (50).

3. A canal irrigation outlet valve according to claim 1, characterized in that: A guide member (41) for guiding the movement of the bottom end of the blocking plate (70) is fixed to one end of the cross seat (40), and the guide member (41) comprises a right-angle fixed rod (411), a sliding guide rod (412) and an arc-shaped blocking block (413). The right-angle fixed rod (411) is fixed to the cross seat (40), and a sliding guide rod (412) is vertically fixed to the bottom end of the right-angle fixed rod (411). A sliding sleeve (72) is sleeved on the sliding guide rod (412), and the sliding sleeve (72) is fixed to the bottom of the blocking plate (70). The end of the sliding guide rod (412) is fixed to the arc-shaped blocking block (413).

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