Hydraulic valve bank for opening and closing device

Abstract

The hydraulic valve bank for the opening and closing device comprises a valve bank body, the oil inlet end of the valve bank body is fixedly connected with an oil conveying pipe, an avoiding notch is formed in the top end of the oil conveying pipe, a blocking arc plate is arranged on the avoiding notch, and a plurality of impurity blocking nets are fixedly connected to the inner side of the blocking arc plate; positioning plates are rotationally connected to the four end corners of the bottom end of the plugging arc plate, a transmission assembly is arranged at the top end of the plugging arc plate, and the transmission assembly is used for being matched with the positioning plates to lock the position of the plugging arc plate. Through structural cooperation of the impurity blocking net, the positioning plate and the transmission assembly, oil entering the valve bank body can be effectively filtered, it is avoided that impurities in the oil block the valve bank body and affect normal operation of the valve bank body, and when the effect of the impurity blocking net is poor, the impurity blocking net and the avoiding notch are connected in a combined mode, so that the impurity blocking effect is improved. And the cleaning of the impurity blocking net can be conveniently realized.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic valve groups, in particular to a hydraulic valve group for an opening and closing device. Background Art

[0002] The opening and closing device is an automatic control device, which is mainly used to control the opening, closing, regulation and flow rate maintenance of the fluid, so that the switch, flow, pressure, liquid level and other parameters of the controlled object can be remotely controlled to achieve the purpose of automatic operation;

[0003] At present, the opening and closing device needs to centrally control the pipeline through the hydraulic valve group to improve the overall integration. During the application of the hydraulic valve group, the oil inlet is often provided with a filter to filter out impurities in the oil. However, since the filter is located inside the oil inlet, the blocked impurities are still accumulated in the oil inlet. The excessive accumulation of impurities directly affects the application effect of the hydraulic valve group.

[0004] To this end, the present invention provides a hydraulic valve group for an opening and closing device to solve the above-mentioned problem. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a hydraulic valve group for an opening and closing device, which solves the above-mentioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a hydraulic valve group for an opening and closing device, comprising a valve group main body, the oil inlet end of the valve group main body is fixedly connected to an oil pipe, the top of the oil pipe is provided with an avoidance notch, a sealing arc plate is provided on the avoidance notch, a plurality of impurity blocking nets are fixedly connected to the inner side of the sealing arc plate, the four end corners of the bottom end of the sealing arc plate are rotatably connected to a positioning plate, a transmission assembly is provided on the top of the sealing arc plate, the transmission assembly is used to cooperate with the positioning plate to lock the position of the sealing arc plate, both ends of one side of the oil pipe are fixedly connected to a transmission pipe, a detachable oil delivery branch pipe is provided between the two transmission pipes, the front end and the rear end of the oil pipe are provided with sealing assemblies, and the two sealing assemblies are located between the two transmission pipes, and the sealing assembly is used to cooperate with the oil delivery branch pipe to change the flow direction of oil in the oil pipe.

[0007] Preferably, the transmission assembly includes a linear slide rod, a displacement frame, a linkage rod, a linkage plate, a guide seat, a guide slot and a positioning seat, both ends of the top of the blocking arc plate are fixedly connected with the linear slide rods, the outer sides of the two linear slide rods are slidably connected with the displacement frame, both ends of the two displacement frames are rotatably connected with the linkage rods, the middle parts of the four positioning plates are fixedly connected with the linkage plate, and the ends of the four linkage rods away from the displacement frame are rotatably connected with one end of the four linkage plates, the bottom end of the displacement frame is fixedly connected with the guide seat, the middle part of the guide seat is provided with a guide slot, the top end of the blocking arc plate is fixedly connected with the positioning seat, and the middle part of the positioning seat is rotatably connected with the central shaft rod.

[0008] Preferably, the transmission assembly also includes an eccentric guide plate, an eccentric transmission plate, a transmission slot, a transmission frame and a transmission screw, both ends of the central shaft are fixedly connected with the eccentric guide plates, and the ends of the two eccentric guide plates away from the central shaft are respectively movably connected to the inside of the two guide slots, the middle part of the central shaft is fixedly connected with the eccentric transmission plate, the middle part of the eccentric transmission plate is provided with a transmission slot, the top end of the blocking arc plate is fixedly connected with the transmission frame, the inner side of the transmission frame is rotatably connected with the transmission screw, the transmission screw is threadedly connected with a displacement push plate, one end of the displacement push plate is fixedly connected with a transmission rod, and the transmission rod is also movably connected to the inside of the transmission slot.

[0009] Preferably, the blocking assembly includes a stabilizing cylinder, a blocking plate, a linkage rack and a linkage frame. Avoidance channels are provided at both ends of the top of the oil pipeline. The two avoidance channels are fixedly connected with a stabilizing cylinder. The stabilizing cylinder is a hollow structure. The inside of the stabilizing cylinder is vertically slidably connected with a blocking plate. One side of the top of the blocking plate is fixedly connected with a linkage rack. The top of the blocking arc plate is fixedly connected with two linkage frames. The top of the linkage frame is rotatably connected with a linkage shaft rod. The middle part of the linkage shaft rod is fixedly connected with a linkage spur gear. The linkage rack is also meshedly connected to one end of the linkage spur gear, and reset notches are provided at both ends of the blocking plate. A stabilization slide rod is fixedly connected to the inner side of the reset notch, and both ends of the stabilization cylinder are fixedly connected to a stabilization seat, and the top of the stabilization seat is also slidably connected to the outer side of the stabilization slide rod, and a coil spring is fixedly connected between the top of the stabilization seat and the top of the inner side of the reset notch, and a transmission rack is fixedly connected to the side of the displacement frame close to the linkage spur gear, and the transmission rack is also meshedly connected to the other end of the linkage spur gear.

[0010] Preferably, the four end corners of the arc blocking plate are each provided with a mounting groove, and the positioning plate is connected to the inside of the mounting groove via a rotating shaft.

[0011] Preferably, one end of the transmission pipe and both ends of the oil delivery branch pipe are fixedly connected with flanges, and the transmission pipe and the oil delivery branch pipe are connected via the flanges.

[0012] Preferably, a manual valve is provided in the middle of the transmission pipe, and a filter is fixedly connected to the inside of the oil delivery branch pipe.

[0013] Preferably, one end of the eccentric guide plate away from the central shaft is fixedly connected with a guide pin, and the eccentric guide plate is movably connected to the inside of the guide slot via the guide pin.

[0014] Preferably, a linear guide rod is fixedly connected to the inner side of the transmission frame, a linear through hole is opened in the middle of the displacement push plate, and a clearance fit is formed between the through hole and the linear guide rod.

[0015] Preferably, the bottom end of the sealing plate is an arc-shaped structure, and a sealing strip is fixedly connected to the outer side of the sealing plate.

[0016] Beneficial Effects

[0017] The present invention provides a hydraulic valve group for an opening and closing device. Compared with the prior art, it has the following beneficial effects:

[0018] The hydraulic valve group for the opening and closing device can effectively filter the oil entering the valve group body through the structural cooperation of the impurity barrier net, the positioning plate and the transmission component, so as to prevent impurities in the oil from clogging the valve group body and affecting the normal operation of the valve group body, and when the impurity barrier net is not effective, the impurity barrier net can be easily cleaned through the combined connection of the impurity barrier net and the avoidance gap.

[0019] The hydraulic valve group used in the opening and closing device, through the structural coordination of the transmission pipe, the oil delivery branch pipe and the blocking component, can change the flow direction of the oil in the oil pipeline when the impurity net is removed for cleaning, thereby realizing the cleaning operation without stopping the machine, making the overall operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the present invention;

[0021] Figure 2 is a side view of the present invention;

[0022] Figure 3 It is a schematic diagram of the assembly structure of the positioning plate of the present invention;

[0023] Figure 4 It is a schematic diagram of the separation structure of the oil pipeline and the arc blocking plate of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the transmission assembly of the present invention;

[0025] Figure 6It is a schematic diagram of the separation structure of the transmission slot and the transmission rod of the present invention;

[0026] Figure 7 It is a schematic diagram of the linkage structure of the linkage rod of the present invention;

[0027] Figure 8 It is a structural schematic diagram of the plugging assembly of the present invention;

[0028] Fig. 9 It is a schematic diagram of the connection structure of the stabilizing cylinder and the blocking plate of the present invention.

[0029] In the figure, 1, valve group body; 2, oil pipeline; 3, avoidance gap; 4, arc blocking plate; 5, impurity blocking net; 6, positioning plate; 7, transmission assembly; 8, transmission pipe; 9, oil delivery branch pipe; 10, blocking assembly; 11, linear slide rod; 12, displacement frame; 13, linkage rod; 14, linkage plate; 15, guide seat; 16, guide groove; 17, positioning seat; 18, central shaft; 19, eccentric guide plate; 20, eccentric transmission plate ; 21. Transmission groove; 22. Transmission frame; 23. Transmission screw; 24. Displacement push plate; 25. Transmission rod; 26. Avoidance channel; 27. Stabilization cylinder; 28. Sealing plate; 29. ​​Linkage rack; 30. Linkage frame; 31. Linkage shaft; 32. Linkage spur gear; 33. Reset notch; 34. Stabilization slide rod; 35. Stabilization seat; 36. Coil spring; 37. Flange; 38. Manual valve; 39. Transmission rack. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] See also Figure 1-3, a hydraulic valve group for an opening and closing device, comprising a valve group body 1, an oil inlet end of the valve group body 1 is fixedly connected to an oil pipeline 2, a avoidance gap 3 is arranged at the top of the oil pipeline 2, a blocking arc plate 4 is arranged on the avoidance gap 3, a plurality of impurity blocking nets 5 are fixedly connected to the inner side of the blocking arc plate 4, four end corners at the bottom end of the blocking arc plate 4 are rotatably connected to a positioning plate 6, a transmission assembly 7 is arranged at the top of the blocking arc plate 4, the transmission assembly 7 is used to cooperate with the positioning plate 6 to lock the position of the blocking arc plate 4, both ends of one side of the oil pipeline 2 are fixedly connected to a transmission pipe 8, a detachable oil delivery branch pipe 9 is arranged between the two transmission pipes 8, a blocking assembly 10 is arranged at the front end and the rear end of the oil pipeline 2, and the two blocking assemblies 10 are located between the two transmission pipes 8, and the blocking assembly 10 is used to cooperate with the oil delivery branch pipe 9 to change the flow direction of the oil in the oil pipeline 2;

[0033] In detail, the four end corners of the arc blocking plate 4 are provided with mounting grooves, and the positioning plate 6 is connected to the inside of the mounting grooves through a rotating shaft. By setting the mounting grooves, the positioning plate 6 can be stably assembled with the arc blocking plate 4 to ensure the application effect of the positioning plate 6. In this embodiment, the positioning plate 6 is an arc-shaped structure, and a rubber pad is fixedly connected to the inner side of the positioning plate 6, and an anti-slip pattern is provided on the outer side of the rubber pad;

[0034] Here, the size of the arc blocking plate 4 is larger than the size of the avoidance gap 3, and a sealing gasket is provided at the connection between the arc blocking plate 4 and the avoidance gap 3;

[0035] Furthermore, one end of the transmission pipe 8 and both ends of the oil delivery branch pipe 9 are fixedly connected with flanges 37, and the transmission pipe 8 and the oil delivery branch pipe 9 are connected by the flanges 37. By setting the flanges 37, the stability of the transmission pipe 8 and the oil delivery branch pipe 9 can be ensured, and when the oil delivery branch pipe 9 is not in good use, the oil delivery branch pipe 9 can be easily removed and replaced;

[0036] Preferably, a manual valve 38 is provided in the middle of the transmission pipe 8, and a filter is fixedly connected to the inside of the oil delivery branch pipe 9. The manual valve 38 can be used to conveniently control the on / off of the transmission pipe 8 to prevent the oil in the oil delivery pipe 2 from flowing uncontrollably. In addition, the filter can be used to filter the oil entering the oil delivery branch pipe 9 to prevent impurities in the oil from entering the valve group body 1.

[0037] Embodiment 2:

[0038] See also Figure 4-7, this embodiment provides a technical solution based on the first embodiment: the transmission assembly 7 includes a linear slide bar 11, a displacement frame 12, a linkage rod 13, a linkage plate 14, a guide seat 15, a guide slot 16 and a positioning seat 17, both ends of the top of the arc blocking plate 4 are fixedly connected with the linear slide bar 11, the outer sides of the two linear slide bars 11 are slidably connected with the displacement frame 12, both ends of the two displacement frames 12 are rotatably connected with the linkage rod 13, the middle parts of the four positioning plates 6 are fixedly connected with the linkage plate 14, and the ends of the four linkage rods 13 away from the displacement frame 12 are rotatably connected with one end of the four linkage plates 14, the bottom end of the displacement frame 12 is fixedly connected with the guide seat 15, the middle part of the guide seat 15 is provided with a guide slot 16, the top end of the arc blocking plate 4 is fixedly connected with the positioning seat 17, and the middle part of the positioning seat 17 is rotatably connected with the central shaft 18;

[0039] The transmission assembly 7 also includes an eccentric guide plate 19, an eccentric transmission plate 20, a transmission slot 21, a transmission frame 22 and a transmission screw 23. Both ends of the central shaft 18 are fixedly connected with the eccentric guide plates 19, and the ends of the two eccentric guide plates 19 away from the central shaft 18 are respectively movably connected to the inside of the two guide slots 16. The middle part of the central shaft 18 is fixedly connected with the eccentric transmission plate 20, and the middle part of the eccentric transmission plate 20 is provided with a transmission slot 21. The top of the blocking arc plate 4 is fixedly connected with the transmission frame 22, and the inner side of the transmission frame 22 is rotatably connected with the transmission screw 23. A displacement push plate 24 is threadedly connected to the transmission screw 23, and one end of the displacement push plate 24 is fixedly connected with a transmission rod 25, and the transmission rod 25 is also movably connected to the inside of the transmission slot 21.

[0040] In detail, a guide pin is fixedly connected to one end of the eccentric guide plate 19 away from the central shaft 18, and the eccentric guide plate 19 is movably connected to the inside of the guide slot 16 through the guide pin. By using the setting of the guide pin, during the rotation of the eccentric guide plate 19, the guide pin can be driven to move inside the guide slot 16, thereby driving the displacement frame 12 to slide adaptively on the outside of the linear slide rod 11. Here, a protective sleeve can also be fixedly connected to the outside of the guide pin to reduce the loss of the guide pin when it moves inside the guide slot 16.

[0041] Furthermore, a linear guide rod is fixedly connected to the inner side of the transmission frame 22, a linear through hole is opened in the middle of the displacement push plate 24, and a clearance fit is formed between the through hole and the linear guide rod. By setting the linear guide rod, the displacement of the displacement push plate 24 can be effectively guided to prevent the displacement push plate 24 from rotating with the transmission screw 23.

[0042] Embodiment three:

[0043] See also Figure 8-9The present embodiment provides a technical solution based on the first embodiment: the plugging assembly 10 includes a stabilizing cylinder 27, a plugging plate 28, a linkage rack 29 and a linkage frame 30. Avoidance channels 26 are provided at both ends of the top of the oil pipeline 2. The two avoidance channels 26 are fixedly connected with stabilizing cylinders 27. The stabilizing cylinder 27 is a hollow structure. The inside of the stabilizing cylinder 27 is vertically slidably connected with the plugging plate 28. One side of the top of the plugging plate 28 is fixedly connected with a linkage rack 29. The top of the blocking arc plate 4 is fixedly connected with two linkage frames 30. The top of the linkage frame 30 is rotatably connected with a linkage shaft rod 31. The middle part of the linkage shaft rod 31 is fixedly connected to the A linkage spur gear 32 is connected, and the linkage rack 29 is also meshedly connected to one end of the linkage spur gear 32. Reset notches 33 are provided at both ends of the blocking plate 28. A stabilizing slide bar 34 is fixedly connected to the inner side of the reset notch 33. Both ends of the stabilizing cylinder 27 are fixedly connected to a stabilizing seat 35, and the top of the stabilizing seat 35 is also slidably connected to the outer side of the stabilizing slide bar 34. A coil spring 36 is fixedly connected between the top of the stabilizing seat 35 and the top of the inner side of the reset notch 33. A transmission rack 39 is fixedly connected to the side of the displacement frame 12 close to the linkage spur gear 32, and the transmission rack 39 is also meshedly connected to the other end of the linkage spur gear 32.

[0044] Preferably, the bottom end of the sealing plate 28 is an arc-shaped structure, and a sealing strip is fixedly connected to the outer side of the sealing plate 28. By utilizing the structural characteristics of the sealing plate 28, when the sealing plate 28 is moved into the oil pipeline 2, the inside of the oil pipeline 2 can be effectively sealed to prevent uncontrollable flow of oil.

[0045] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0046] Working principle: first, place the arc blocking plate 4 at the top of the oil pipeline 2, corresponding to the avoidance gap 3, and make the transmission rack 39 mesh with the linkage spur gear 32, then press the arc blocking plate 4 downward to make the arc blocking plate 4 cover the avoidance gap 3, then rotate the transmission screw 23, cooperate with the connection between the transmission screw 23 and the displacement push plate 24, and use the displacement push plate 24 to drive the transmission rod 25 to adjust along the transmission screw 23, and push the eccentric transmission plate 20 under the connection between the transmission rod 25 and the transmission groove 21. Since the eccentric transmission plate 20 is supported by the central shaft 18, The eccentric guide plate 19 can be driven to rotate by the central shaft 18, and the connection between the eccentric guide plate 19 and the central shaft 18 is matched. When the eccentric guide plate 19 rotates, the displacement frame 12 can be pulled, so that the displacement frame 12 is displaced under the limit of the linear slide rod 11, and because the linkage rod 13 is connected between the linkage plate 14 and the displacement frame 12, when the displacement frame 12 is displaced, the linkage plate 14 can be pushed by the linkage rod 13, so that the linkage plate 14 drives the positioning plate 6 to flip, until the positioning plate 6 is tightly fitted with the bottom end of the oil pipeline 2, so as to position the arc blocking plate 4 on the oil pipeline 2;

[0047] In the process of the displacement frame 12 moving downward, the transmission rack 39 can be used to drive the linkage spur gear 32 to rotate, and the linkage spur gear 32 can be used to drive the linkage rack 29, so as to drive the blocking plate 28 to move upward under the limit of the stabilizing cylinder 27, and cause the spiral spring 36 to deform, until the blocking plate 28 releases the blockage of the oil pipeline 2, and the external oil supply pipeline is connected to the oil pipeline 2, and the required oil is provided to the valve group body 1. Before the oil enters the valve group body 1, the impurities in the oil can be blocked by the impurity net 5 to prevent the impurities from entering the valve group body 1;

[0048] When the application effect of the impurity-blocking net 5 is not good, the transmission screw 23 is rotated in the opposite direction to drive the displacement frame 12 to move up, prompting the positioning plate 6 to flip in the direction away from the oil pipeline 2, and releasing the lock on the blocking arc plate 4. When the displacement frame 12 moves up, the transmission rack 39 can be used to shift the linkage spur gear 32 to drive the blocking plate 28 to move downward, prompting the blocking plate 28 to block the oil pipeline 2, and at the same time, the manual valve 38 is rotated to open the transmission pipe 8, so that the oil can bypass the impurity-blocking net 5 through the transmission pipe 8 and the oil delivery branch pipe 9, and be injected into the oil pipeline 2, and then the oil is transmitted from the oil pipeline 2 to the valve group body 1, and then the blocking arc plate 4 is removed from above the oil pipeline 2, so that the impurity-blocking net 5 can be replaced without stopping the machine, so as to avoid affecting the use of the valve group body 1.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic valve group for an opening and closing device, characterized in that: The invention comprises a valve group body (1), wherein the oil inlet end of the valve group body (1) is fixedly connected to an oil delivery pipe (2), the top end of the oil delivery pipe (2) is provided with an avoidance notch (3), a blocking arc plate (4) is provided on the avoidance notch (3), a plurality of impurity blocking nets (5) are fixedly connected to the inner side of the blocking arc plate (4), the four end corners of the bottom end of the blocking arc plate (4) are rotatably connected to positioning plates (6), a transmission assembly (7) is provided at the top end of the blocking arc plate (4), and the transmission assembly (7) is used to In order to cooperate with the positioning plate (6) to lock the position of the sealing arc plate (4), both ends of one side of the oil pipeline (2) are fixedly connected with transmission pipes (8), a detachable oil delivery branch pipe (9) is arranged between the two transmission pipes (8), and a sealing component (10) is arranged at the front end and the rear end of the oil pipeline (2), and the two sealing components (10) are located between the two transmission pipes (8). The sealing component (10) is used to cooperate with the oil delivery branch pipe (9) to change the flow direction of oil in the oil pipeline (2).

2. A hydraulic valve group for an opening and closing device according to claim 1, characterized in that: The transmission assembly (7) comprises a linear slide bar (11), a displacement frame (12), a linkage rod (13), a linkage plate (14), a guide seat (15), a guide slot (16) and a positioning seat (17); both ends of the top of the arc blocking plate (4) are fixedly connected to the linear slide bar (11); the outer sides of the two linear slide bars (11) are slidably connected to the displacement frames (12); both ends of the two displacement frames (12) are rotatably connected to the linkage rod (13); the four positioning plates The middle part of each of the arc blocking plates (6) is fixedly connected with a linkage plate (14), and one end of each of the four linkage rods (13) away from the displacement frame (12) is rotatably connected to one end of each of the four linkage plates (14). The bottom end of the displacement frame (12) is fixedly connected with a guide seat (15), and a guide through groove (16) is provided in the middle part of the guide seat (15). The top end of the arc blocking plate (4) is fixedly connected with a positioning seat (17), and a central shaft rod (18) is rotatably connected to the middle part of the positioning seat (17).

3. A hydraulic valve group for an opening and closing device according to claim 2, characterized in that: The transmission assembly (7) further comprises an eccentric guide plate (19), an eccentric transmission plate (20), a transmission slot (21), a transmission frame (22) and a transmission screw (23); both ends of the central shaft (18) are fixedly connected to the eccentric guide plates (19); one end of the two eccentric guide plates (19) away from the central shaft (18) is movably connected to the inside of the two guide slots (16); the middle part of the central shaft (18) is fixedly connected to the eccentric transmission plate (21); 20), a transmission slot (21) is provided in the middle of the eccentric transmission plate (20), a transmission frame (22) is fixedly connected to the top of the arc blocking plate (4), a transmission screw (23) is rotatably connected to the inner side of the transmission frame (22), a displacement push plate (24) is threadedly connected to the transmission screw (23), one end of the displacement push plate (24) is fixedly connected to a transmission rod (25), and the transmission rod (25) is also movably connected to the inside of the transmission slot (21).

4. The hydraulic valve group for an opening and closing device according to claim 1 is characterized in that: The blocking assembly (10) comprises a stabilizing cylinder (27), a blocking plate (28), a linkage rack (29) and a linkage frame (30). Avoidance channels (26) are provided at both ends of the top of the oil pipeline (2). The two avoidance channels (26) are fixedly connected with a stabilizing cylinder (27). The stabilizing cylinder (27) is a hollow structure. The inside of the stabilizing cylinder (27) is vertically slidably connected with a blocking plate (28). One side of the top of the blocking plate (28) is fixedly connected with a linkage rack (29). The top of the blocking arc plate (4) is fixedly connected with two linkage frames (30). The top of the linkage frame (30) is rotatably connected with a linkage shaft rod (31). The middle of the linkage shaft rod (31) is fixedly connected with a linkage spur gear (32). , and the linkage rack (29) is also meshedly connected to one end of the linkage spur gear (32), both ends of the blocking plate (28) are provided with reset notches (33), the inner side of the reset notch (33) is fixedly connected with a stabilizing slide bar (34), both ends of the stabilizing cylinder (27) are fixedly connected with a stabilizing seat (35), and the top of the stabilizing seat (35) is also slidably connected to the outer side of the stabilizing slide bar (34), a coil spring (36) is fixedly connected between the top of the stabilizing seat (35) and the top of the inner side of the reset notch (33), and a transmission rack (39) is fixedly connected to the side of the displacement frame (12) close to the linkage spur gear (32), and the transmission rack (39) is also meshedly connected to the other end of the linkage spur gear (32).

5. The hydraulic valve group for an opening and closing device according to claim 1 is characterized in that: The four end corners of the arc blocking plate (4) are each provided with a mounting groove, and the positioning plate (6) is connected to the inside of the mounting groove via a rotating shaft.

6. The hydraulic valve group for an opening and closing device according to claim 1, characterized in that: One end of the transmission pipe (8) and both ends of the oil delivery branch pipe (9) are fixedly connected with flanges (37), and the transmission pipe (8) and the oil delivery branch pipe (9) are connected via the flanges (37).

7. The hydraulic valve group for an opening and closing device according to claim 1 is characterized in that: A manual valve (38) is provided in the middle of the transmission pipe (8), and a filter screen is fixedly connected to the inside of the oil delivery branch pipe (9).

8. The hydraulic valve group for an opening and closing device according to claim 3 is characterized in that: One end of the eccentric guide plate (19) away from the central shaft (18) is fixedly connected with a guide pin, and the eccentric guide plate (19) is movably connected inside the guide slot (16) via the guide pin.

9. The hydraulic valve group for an opening and closing device according to claim 3, characterized in that: A linear guide rod is fixedly connected to the inner side of the transmission frame (22), a linear through hole is opened in the middle of the displacement push plate (24), and a clearance fit is formed between the through hole and the linear guide rod.

10. The hydraulic valve group for an opening and closing device according to claim 4, characterized in that: The bottom end of the blocking plate (28) is an arc-shaped structure, and a sealing strip is fixedly connected to the outer side of the blocking plate (28).

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