Sand blasting device for locking valve machining surface treatment

Abstract

The utility model discloses a sand blasting device for processing the processing surface of a locking valve, which comprises a base, and the upper end face of the base is fixedly connected with a mounting frame. By arranging a clamping plate, a telescopic air cylinder, a second servo motor, a first servo motor, a first threaded rod, a moving groove and a first plate, after clamping and fixing of a valve body are completed, the first servo motor is started, and the output end of the first servo motor drives the first threaded rod to rotate; finally, the telescopic air cylinder is started to enable the telescopic end of the telescopic air cylinder to push a first plate so that the valve body can be immersed into clear water in the cleaning tank, and then a second servo motor is started to enable the output end of the second servo motor to drive a second plate and the valve body to rotate in the cleaning tank; at the moment, cleaning of the valve body before sand blasting is achieved, the situation that the sand blasting effect on the valve body is reduced due to oil stains attached to the surface of the valve body is avoided, and the yield of the valve body after sand blasting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sandblasting devices, in particular to a sandblasting device for surface treatment of a lock valve. Background Art

[0002] Valves are important control parts in fluid delivery systems, with functions such as regulation, diversion, pressure stabilization, cutoff, and diversion. The surface of the valve needs to be sandblasted during casting, which can effectively enhance the surface strength and service life of the valve body and effectively prevent metal oxidation on the valve surface.

[0003] After searching, the publication number is: CN220179062U, which discloses a sandblasting device for valve surface treatment. The valve is cleaned by rotating the brush, and the brush is driven by the second electric telescopic rod to clean the valve surface in time, and the manual labor is reduced. The valve after sandblasting is pushed into the collection tank for cleaning by sliding the push plate on the top of the L-shaped work frame, thereby improving the cleaning efficiency. However, in the above-mentioned existing method, the valve surface is first cleaned with a brush and then sandblasted. When the valve surface is attached with oil before sandblasting, the brush cannot clean the oil on the valve surface. The oil attached to the valve surface will reduce the adhesion between the sandblasting material and the valve surface, and the yield rate after sandblasting is low.

[0004] In order to solve the above problems, the utility model provides a sandblasting device for surface treatment of a lock valve. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a sandblasting device for surface treatment of a lock valve to solve the technical problem in the prior art that "the valve surface is first cleaned with a brush and then sandblasted. When oil stains are attached to the surface of the valve before sandblasting, the brush cannot clean the oil stains on the valve surface. The oil stains attached to the valve surface will reduce the adhesion between the sandblasting material and the valve surface, resulting in a low yield after sandblasting."

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] A sandblasting device for surface treatment of a lock valve comprises a base, the upper end surface of the base is fixedly connected with a mounting frame, a side wall of the mounting frame is fixedly installed with a No. 1 servo motor, a lower end surface of the mounting frame is provided with a moving groove, an output end of the No. 1 servo motor is fixedly connected with a No. 1 threaded rod, a moving block is threadedly sleeved on the No. 1 threaded rod, a telescopic cylinder is fixedly installed on the lower end surface of the moving block, a No. 1 plate is fixedly connected with the telescopic end of the telescopic cylinder, a No. 1 servo motor is fixedly installed on the lower end surface of the No. 1 plate, a No. 2 servo motor is fixedly connected with the No. 2 plate at the output end of the No. 2 servo motor, a connecting plate is symmetrically fixedly connected with the lower end surface of the No. 2 plate, a connecting block is fixedly connected with the lower end surfaces of the two connecting plates, a No. 3 servo motor is fixedly installed on the upper end surface of the connecting block, a No. 2 threaded rod is fixedly connected with the output end of the No. 3 servo motor, a No. 1 block is fixedly connected to the No. 2 threaded rod, both side walls of the connecting block are fixedly connected with the No. 1 block, a No. 1 rod is fixedly inserted in each of the two No. 1 blocks, and both ends of the two No. 1 rods are rotatably connected There is a No. 1 connecting rod, and the ends of the two No. 1 connecting rods on the same side that are away from the No. 1 rod are commonly fixedly connected to the No. 2 rod, and the two No. 2 rods are both rotatably sleeved with the No. 2 connecting rods, and the No. 2 threaded rods are threadedly sleeved with lifting blocks, and connecting grooves are provided on both sides of the lifting blocks, and the two connecting grooves are fixedly connected with the No. 3 rods, and the two No. 2 connecting rods are respectively rotatably sleeved on the two No. 3 rods, and the opposite side walls of the two No. 2 connecting rods are fixedly connected with clamping plates, and a valve body is arranged between the two clamping plates. A sandblasting tank, an electric heater and a water tank are fixedly installed on the side wall of the base, a liquid inlet hopper is inserted on the upper end surface of the water tank, a cleaning tank, a spin-drying tank and a sandblasting tank are provided on the upper end surface of the base, a liquid pump is fixedly installed in the water tank, a water supply pipe is fixedly connected to the infusion end of the liquid pump, the other end of the water supply pipe passes through the inner wall of the base and is connected to the cleaning tank, two installation grooves are symmetrically provided on the inner wall of the sandblasting tank, nozzles are fixedly installed in the two installation grooves, and clean water is provided in the cleaning tank.

[0008] As a preferred technical solution of the utility model, the input ends of the two nozzles are fixedly connected with a transmission hose, the other ends of the two transmission hoses are commonly fixedly connected with a diverter sleeve, the other end of the diverter sleeve is fixedly connected with a sand delivery pipe, the other end of the sand delivery pipe is connected to the sand blasting tank, and a switch valve is fixedly installed on the sand delivery pipe.

[0009] As a preferred technical solution of the utility model, heating plates are symmetrically fixedly installed on the side walls of the spin-drying tank, and both of the heating plates are electrically connected to the electric heater.

[0010] As the preferred technical solution of the utility model, a placement groove is opened on the side wall of the base, a filter hole connected to the placement groove is opened at the lower end of the inner wall of the spin drying groove, a collection frame is placed in the placement groove, and a handle is fixedly connected to the side wall of the collection frame.

[0011] As a preferred technical solution of the utility model, the side wall of the moving block is slidably connected to the inner wall of the moving groove.

[0012] As a preferred technical solution of the utility model, the side walls of the four No. 1 connecting rods are respectively slidably connected to the side walls of the two No. 1 blocks, and the side walls of the two No. 2 connecting rods are respectively slidably connected to the inner walls of the four No. 1 connecting rods.

[0013] The utility model provides a sandblasting device for surface treatment of a lock valve, which has the following beneficial effects:

[0014] 1. By setting a clamping plate, a telescopic cylinder, a No. 2 servo motor, a No. 1 servo motor, a No. 1 threaded rod, a moving groove, and a No. 1 plate, after the clamping and fixing of the valve body is completed, the No. 1 servo motor is started to make its output end drive the No. 1 threaded rod to rotate, so that the moving block drives the telescopic cylinder and the valve body below to move to the top of the cleaning groove in the moving groove, and finally the telescopic cylinder is started to make its telescopic end push the No. 1 plate to immerse the valve body in the clean water in the cleaning groove, and then the No. 2 servo motor is started to make its output end drive the No. 2 plate and the valve body to rotate in the cleaning groove, at this time, the cleaning of the valve body before sandblasting is realized, and the oil stains attached to the surface of the valve body are avoided to reduce the effect of sandblasting, and the yield rate of the valve body after sandblasting is improved;

[0015] 2. By setting a heating plate and an electric heater, when the two clamping plates hold the valve body and enter the spin-drying tank, start the electric heater to heat and dry the valve body in the spin-drying tank through the two heating plates, so that the surface of the cleaned valve body can be dried faster, so as to facilitate the subsequent sandblasting process;

[0016] 3. By setting up a water storage tank and a liquid pump, when it is necessary to replace the sewage in the cleaning tank, the staff first uses a pumping machine to extract the sewage from the cleaning tank, and then adds clean water to the water storage tank through the liquid inlet hopper, and then starts the liquid pump to transport the clean water from the input end of the liquid pump through the water supply pipe into the cleaning tank, thereby adding clean water to the cleaning tank, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of a sandblasting device for surface treatment of a lock valve provided by the utility model;

[0018] Figure 2 This is a front structural cross-sectional view of a sandblasting device for surface treatment of a lock valve proposed by the utility model;

[0019] Figure 3 This is a front structural cross-sectional view of a sandblasting device for surface treatment of a lock valve proposed by the utility model when it is idle;

[0020] Figure 4 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0021] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0022] In the figure: 1 base, 2 sandblasting pot, 3 electric heater, 4 water storage tank, 5 liquid pump, 6 placement slot, 7 collection frame, 8 mounting frame, 9 No. 1 servo motor, 10 moving slot, 11 No. 1 threaded rod, 12 moving block, 13 telescopic cylinder, 14 No. 2 servo motor, 15 No. 2 plate, 16 No. 3 servo motor, 17 connecting block, 18 No. 1 block, 19 No. 1 connecting rod, 20 No. 2 connecting rod, 21 lifting block, 22 splint, 23 valve body, 24 cleaning slot, 25 spin-drying slot, 26 heating plate, 27 sandblasting slot, 28 sand conveying pipe, 29 nozzle. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the implementation mode of the utility model in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] Example

[0025] refer to Figure 1-5A sandblasting device for surface treatment of a lock valve comprises a base 1, the upper end surface of the base 1 is fixedly connected with a mounting frame 8, a servo motor 9 is fixedly installed on the side wall of the mounting frame 8, a moving groove 10 is provided on the lower end surface of the mounting frame 8, a threaded rod 11 is fixedly connected to the output end of the servo motor 9, a moving block 12 is threadedly sleeved on the threaded rod 11, a telescopic cylinder 13 is fixedly installed on the lower end surface of the moving block 12, a telescopic end of the telescopic cylinder 13 is fixedly connected with a plate, and a plate is fixedly installed on the lower end surface of the plate A No. 2 servo motor 14 is fixedly connected to a No. 2 plate 15 at the output end of the No. 2 servo motor 14. A connecting plate is symmetrically fixedly connected to the lower end surface of the No. 2 plate 15. A connecting block 17 is fixedly connected to the lower end surfaces of the two connecting plates. A No. 3 servo motor 16 is fixedly installed on the upper end surface of the connecting block 17. A No. 2 threaded rod is fixedly connected to the output end of the No. 3 servo motor 16. A No. 2 threaded rod is fixedly connected to the output end of the No. 3 servo motor 16. A No. 1 block 18 is fixedly connected to the side walls on both sides of the connecting block 17. A No. 1 rod is fixedly inserted in each of the two No. 1 blocks 18. Both ends of the two No. 1 rods are rotatably connected. A No. 1 connecting rod 19 is connected, and the ends of the two No. 1 connecting rods 19 on the same side that are away from the No. 1 rod are fixedly connected to the No. 2 rod. The two No. 2 rods are both rotatably sleeved with a No. 2 connecting rod 20. The No. 2 threaded rod is threadedly sleeved with a lifting block 21. Both sides of the lifting block 21 are provided with connecting grooves, and the two connecting grooves are fixedly connected with the No. 3 rods. The two No. 2 connecting rods 20 are respectively rotatably sleeved on the two No. 3 rods. The opposite side walls of the two No. 2 connecting rods 20 are fixedly connected with a clamping plate 22. A valve body 23 is arranged between the two clamping plates 22. The base A sandblasting tank 2, an electric heater 3, and a water storage tank 4 are fixedly installed on the side wall of the base 1. A liquid inlet hopper is inserted on the upper end surface of the water storage tank 4. A cleaning tank 24, a spin drying tank 25, and a sandblasting tank 27 are provided on the upper end surface of the base 1. A liquid pump 5 is fixedly installed in the water storage tank 4. The infusion end of the liquid pump 5 is fixedly connected to a water supply pipe. The other end of the water supply pipe passes through the inner wall of the base 1 and is connected to the cleaning tank 24. Two installation grooves are symmetrically provided on the inner wall of the sandblasting tank 27. Spray heads 29 are fixedly installed in both installation grooves. Clean water is provided in the cleaning tank 24.

[0026] When the valve body 23 needs to be sandblasted, the valve body 23 is first placed between the two clamping plates 22, and then the No. 3 servo motor 16 is started so that its output end drives the No. 2 threaded rod to rotate, so that the lifting block 21 moves upward along the No. 2 threaded rod, so that the two No. 2 connecting rods 20 move away from each other on the No. 2 rod in the two lifting blocks 21, and the two No. 1 connecting rods 19 move away from each other around the two No. 1 rods respectively under the drive of the two No. 2 connecting rods 20. At this time, the two clamping plates 22 move relatively under the opposite movement of the two No. 2 connecting rods 20 and clamp the valve body 23, and then the No. 1 servo motor 9 is started so that its output end drives the No. 1 threaded rod 11 to rotate, so that the moving block 12 drives the telescopic cylinder 13 and the valve body 23 below in the moving groove 10 to move to the top of the cleaning groove 24, and finally the telescopic cylinder 13 is started so that its telescopic end pushes the No. 1 plate to immerse the valve body 23 in the clean water in the cleaning groove 24. Then start the No. 2 servo motor 14 so that its output end drives the No. 2 plate 15 and the valve body 23 to rotate in the cleaning tank 24. At this time, the valve body 23 is cleaned before sandblasting, which avoids the oil stains attached to the surface of the valve body 23 reducing the effect of sandblasting, and improves the yield of the valve body 23 after sandblasting. Then start the No. 1 servo motor 9 so that its output end drives the No. 1 threaded rod 11 to rotate, so that the moving block 12 moves to the top of the spin-drying tank 25, and then the valve body 23 is pushed into the spin-drying tank 25 by the telescopic end of the telescopic cylinder 13. At this time, start the No. 2 servo motor 14 so that its output end drives the No. 2 plate 15 and the valve body 23 to rotate in the cleaning tank 24, so that the water attached to the surface of the valve body 23 can be thrown out, and finally the moving block 12 is moved to the top of the sandblasting tank 27. When the valve body 23 enters the sandblasting tank 27, the valve body 23 is sandblasted by two nozzles 29.

[0027] When it is necessary to replace the sewage in the cleaning tank 24, the staff first uses a pumping machine to pump out the sewage from the cleaning tank 24, then adds clean water to the water storage tank 4 through the liquid inlet bucket, and then starts the liquid pump 5 to transport the clean water from the input end of the liquid pump 5 and through the water supply pipe into the cleaning tank 24, thereby adding clean water to the cleaning tank 24, saving time and effort;

[0028] Among them, the input ends of the two nozzles 29 are fixedly connected to transmission hoses, and the other ends of the two transmission hoses are fixedly connected to a diverter sleeve. The other end of the diverter sleeve is fixedly connected to a sand conveying pipe 28. The other end of the sand conveying pipe 28 is connected to the sand blasting tank 2, and a switch valve is fixedly installed on the sand conveying pipe 28.

[0029] By setting a transmission hose, a diverter sleeve, a sand delivery pipe 28, and a switch valve, when the valve body 23 enters the sand blasting tank 27, the switch valve is opened, and the sand in the sand blasting tank 2 is transferred to the diverter sleeve through the sand delivery pipe 28, and finally the sand enters the two transmission hoses through the diverter sleeve and is sprayed out by two nozzles 29;

[0030] Among them, heating plates 26 are symmetrically fixedly installed on the side walls of the spin-drying tank 25, and the two heating plates 26 are electrically connected to the electric heater 3.

[0031] By providing the heating plate 26, when the two clamping plates 22 hold the valve body 23 and enter the drying tank 25, the electric heater 3 is started to heat and dry the valve body 23 in the drying tank 25 through the two heating plates 26, so that the surface of the cleaned valve body 23 can be dried faster, so as to facilitate the subsequent sandblasting process;

[0032] A placement groove 6 is provided on the side wall of the base 1, a filter hole connected to the placement groove 6 is provided at the lower end of the inner wall of the spin drying groove 25, a collection frame 7 is placed in the placement groove 6, and a handle is fixedly connected to the side wall of the collection frame 7.

[0033] By providing the placement groove 6, the drain hole, the collection frame 7, and the handle, the water thrown out by the valve body 23 in the drain groove 25 will enter the placement groove 6 along the inner wall of the drain groove 25 and the drain hole. At this time, the collection frame 7 will collect the water entering the placement groove 6, and then the staff will use the handle to take the collection frame 7 out of the placement groove 6, without manually cleaning the water thrown out by the valve body 23 in the drain groove 25, saving time and labor;

[0034] The side wall of the moving block 12 is slidably connected to the inner wall of the moving groove 10 .

[0035] By making the side wall of the moving block 12 slidably connected to the inner wall of the moving groove 10, the moving block 12 can slide along the inner wall of the moving groove 10;

[0036] The side walls of the four No. 1 connecting rods 19 are respectively slidably connected to the side walls of the two No. 1 blocks 18 , and the side walls of the two No. 2 connecting rods 20 are respectively slidably connected to the inner walls of the four No. 1 connecting rods 19 .

[0037] By making the side walls of the four No. 1 connecting rods 19 slidably connected to the side walls of the two No. 1 blocks 18, the four No. 1 connecting rods 19 can slide along the side walls of the two No. 1 blocks 18, and by making the side walls of the two No. 2 connecting rods 20 slidably connected to the inner walls of the four No. 1 connecting rods 19, the two No. 2 connecting rods 20 can slide along the inner walls of the four No. 1 connecting rods 19.

[0038] Wherein, the model of telescopic cylinder 13 is EDA75;

[0039] Among them, the model of liquid pump 5 is CQB-F;

[0040] Among them, the model of the electric heater 3 is XF-6KW-220D.

[0041] The working principle of the utility model is as follows: when the valve body 23 needs to be sandblasted, the valve body 23 is first placed between the two clamping plates 22, and then the No. 3 servo motor 16 is started to drive the No. 2 threaded rod to rotate at its output end, so that the lifting block 21 moves upward along the No. 2 threaded rod, so that the two No. 2 connecting rods 20 move in opposite directions on the No. 2 rods in the two lifting blocks 21, and the two No. 1 connecting rods 19 move in opposite directions around the two No. 1 rods respectively under the drive of the two No. 2 connecting rods 20. At this time, the two clamping plates 22 move relatively under the opposite movement of the two No. 2 connecting rods 20 and clamp the valve body 23, and then the No. 1 servo motor is started. The motor 9 drives the No. 1 threaded rod 11 to rotate at its output end, so that the moving block 12 drives the telescopic cylinder 13 and the valve body 23 below to move to the top of the cleaning tank 24 in the moving tank 10, and finally the telescopic cylinder 13 is started so that its telescopic end pushes the No. 1 plate to immerse the valve body 23 in the clean water in the cleaning tank 24, and then the No. 2 servo motor 14 is started so that its output end drives the No. 2 plate 15 and the valve body 23 to rotate in the cleaning tank 24. At this time, the valve body 23 is cleaned before sandblasting, which avoids the oil stains attached to the surface of the valve body 23 reducing the effect of sandblasting, and improves the yield rate of the valve body 23 after sandblasting.

[0042] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and utility model concept of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

Claims

1. A sandblasting device for surface treatment of a lock valve, comprising a base (1), characterized in that: The upper end surface of the base (1) is fixedly connected to a mounting frame (8), a side wall of the mounting frame (8) is fixedly mounted with a No. 1 servo motor (9), a lower end surface of the mounting frame (8) is provided with a moving groove (10), an output end of the No. 1 servo motor (9) is fixedly connected to a No. 1 threaded rod (11), a moving block (12) is threadedly sleeved on the No. 1 threaded rod (11), a telescopic cylinder (13) is fixedly mounted on the lower end surface of the moving block (12), a telescopic end of the telescopic cylinder (13) is fixedly connected to a No. 1 plate, a No. 2 servo motor (14) is fixedly mounted on the lower end surface of the No. 1 plate, and the No. 2 servo motor (14) is fixedly mounted on the lower end surface of the No. 1 plate. The output end of the machine (14) is fixedly connected to a No. 2 plate (15), the lower end surface of the No. 2 plate (15) is symmetrically fixedly connected to a connecting plate, the lower end surfaces of the two connecting plates are commonly fixedly connected to a connecting block (17), the upper end surface of the connecting block (17) is fixedly installed with a No. 3 servo motor (16), the output end of the No. 3 servo motor (16) is fixedly connected to a No. 2 threaded rod, the side walls of both sides of the connecting block (17) are fixedly connected to a No. 1 block (18), the two No. 1 blocks (18) are fixedly inserted with a No. 1 rod, the two No. 1 rods are rotatably connected to a No. 1 connecting rod (19) at both ends, and the two No. 1 rods on the same side are fixedly connected to the No. 1 connecting rod (19). The end of the No. 1 connecting rod (19) facing away from the No. 1 rod is fixedly connected to the No. 2 rod. The two No. 2 rods are both rotatably sleeved with the No. 2 connecting rod (20). The No. 2 threaded rod is threadably sleeved with a lifting block (21). Both sides of the lifting block (21) are provided with connecting grooves. The two connecting grooves are both fixedly connected with the No. 3 rod. The two No. 2 connecting rods (20) are respectively rotatably sleeved on the two No. 3 rods. The opposite side walls of the two No. 2 connecting rods (20) are fixedly connected with clamping plates (22). A valve body (23) is arranged between the two clamping plates (22). A sandblasting device is fixedly installed on the side wall of the base (1). A tank (2), an electric heater (3), and a water storage tank (4); a liquid inlet hopper is inserted into the upper end surface of the water storage tank (4); a cleaning tank (24), a spin drying tank (25), and a sandblasting tank (27) are provided on the upper end surface of the base (1); a liquid pump (5) is fixedly installed in the water storage tank (4); a liquid delivery pipe is fixedly connected to the infusion end of the liquid pump (5); the other end of the water delivery pipe passes through the inner wall of the base (1) and is connected to the cleaning tank (24); two installation grooves are symmetrically provided on the inner wall of the sandblasting tank (27); a nozzle (29) is fixedly installed in each of the two installation grooves; and clean water is provided in the cleaning tank (24).

2. A sandblasting device for surface treatment of a lock valve according to claim 1, characterized in that: The input ends of the two nozzles (29) are fixedly connected to a transmission hose, the other ends of the two transmission hoses are commonly fixedly connected to a diverter sleeve, the other end of the diverter sleeve is fixedly connected to a sand conveying pipe (28), the other end of the sand conveying pipe (28) is connected to the inside of the sand blasting tank (2), and a switch valve is fixedly installed on the sand conveying pipe (28).

3. A sandblasting device for surface treatment of a lock valve according to claim 1, characterized in that: Heating plates (26) are symmetrically fixedly mounted on the side walls of the spin-drying tank (25), and both of the heating plates (26) are electrically connected to the electric heater (3).

4. A sandblasting device for surface treatment of a lock valve according to claim 1, characterized in that: A placement groove (6) is provided on the side wall of the base (1), a filter hole connected to the placement groove (6) is provided at the lower end of the inner wall of the spin drying groove (25), a collection frame (7) is placed in the placement groove (6), and a handle is fixedly connected to the side wall of the collection frame (7).

5. The sandblasting device for surface treatment of a lock valve according to claim 1, characterized in that: The side wall of the moving block (12) is slidably connected to the inner wall of the moving groove (10).

6. A sandblasting device for surface treatment of a lock valve according to claim 1, characterized in that: The side walls of the four No. 1 connecting rods (19) are respectively slidably connected to the side walls of the two No. 1 blocks (18), and the side walls of the two No. 2 connecting rods (20) are respectively slidably connected to the inner walls of the four No. 1 connecting rods (19).

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