A needle valve lock for a power plant

Abstract

The utility model discloses a power plant needle type valve lockset relates to valve lockset technical field, including needle type valve and lock frame, the left and right side wall of lock frame is centrally symmetric and is provided with locking block, is seted up in the locking block and is opened to the lock hole, the inside splicing of lock hole has U type lock bar, the middle part of U type lock bar passes through the hollow of hollow hand wheel inside. The utility model discloses a U type lock bar is set up, after installing lock frame on needle type valve through padlock, by the both ends of U type lock bar passing through the hollow of hollow hand wheel inside, and then inserting the inside of lock hole, can complete the step of locking needle type valve, can reach simple operation time -saving purpose, by setting up the compression plate, and the rubber block of different thickness is fixed on the needle type valve of different size, the length of U type lock bar insertion lock hole inside, can adjust according to the distance between hollow hand wheel and needle type valve, thereby reach the purpose of improving the application scope of this lockset.

Description

Technical Field

[0001] This utility model relates to the field of valve locking technology, specifically a valve locking device for a needle valve in a power plant. Background Technology

[0002] Valve locking is an important aspect of power plant isolation operations. By locking valves, adjustments can be prevented after the valves have been operated according to defined requirements. This reliably locks the valves, establishing and maintaining a boundary that ensures safe conditions, which is of great significance for ensuring the safe operation of the power plant.

[0003] A valve handwheel lock disclosed in Chinese Utility Model Patent Application Publication CN213575864U uses multiple fixing straps wrapped around the outer circumference of the handwheel and the connecting rod. The locking body locks the fixing straps and the connecting straps at the confluence. Although this utility model can achieve the purpose of locking the valve handwheel, the fixing straps are inconvenient to wrap, the operation steps are complicated, and the locking and unlocking time is very long. In addition, this utility model uses the fixing straps to tighten the handwheel on one side, causing the handwheel to be subjected to unilateral force for a long time, which affects the service life of the valve. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a valve lock for a needle valve in a power plant, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: it includes a needle valve and a lock frame. A hollow handwheel is provided on one side of the needle valve. Locking blocks are provided symmetrically on the left and right side walls of the lock frame. Locking blocks are provided with lock holes. A U-shaped locking rod is inserted into the lock hole. The middle part of the U-shaped locking rod passes through the hollow inside the hollow handwheel. The locking block has a storage tube inside, the bottom of which penetrates the top wall of the lock hole. A locking pin is inserted into one end of the storage tube facing the lock hole. The upper and lower sides of the U-shaped locking rod are provided with tooth grooves, and the end of the locking pin is provided with oblique teeth that cooperate with the tooth grooves for locking.

[0006] Optionally, the end of the locking pin away from the lock hole is inserted into the interior of the storage tube, and the interior of the storage tube is provided with an internal spring that presses the locking pin downward out of the storage tube.

[0007] Optionally, a pressure plate is hinged to one side of the lock frame symmetrical to the locking block. A locking plate is provided at the end of the pressure plate. A circular hole is provided in the middle of the locking plate. A pair of locking rings are provided on the outer wall of the locking block. The locking rings cooperate with the locking plate to lock the pressure plate.

[0008] Optionally, the locking block has a insertion hole on its side wall, the pressing plate has a pressing block that can be inserted into the insertion hole on its side wall, the top of the storage cylinder is fixedly connected to a wedge block, and the bottom edge of the wedge block is fixedly connected to an external spring that pushes the wedge block upward into the insertion hole.

[0009] Optionally, the top of the wedge block is a wedge-shaped inclined surface, the upper and lower edges of the clamping plate are provided with chamfers that cooperate with the wedge-shaped inclined surface, and the length of the clamping block is half the length of the insertion hole.

[0010] Optionally, the inner wall of the lock frame is provided with a rubber sheet, and one side of the pressing plate is provided with a rubber block that presses against the needle valve.

[0011] Optionally, both ends of the needle valve are fixedly connected to pipes.

[0012] This utility model provides a valve lock for a needle valve in a power plant, which has the following advantages: The needle valve lock for this power plant uses a U-shaped locking rod. After the lock frame is installed on the needle valve with a padlock, the two ends of the U-shaped locking rod are passed through the hollow inside the hollow handwheel and then inserted into the lock hole to lock the needle valve. This makes the operation simple and saves time.

[0013] This power plant needle valve lock, by setting a clamping plate, can be fixed to needle valves of different sizes with rubber blocks of different thicknesses. Furthermore, the length of the U-shaped locking rod inserted into the lock hole can be adjusted according to the distance between the hollow handwheel and the needle valve, thereby increasing the applicability of this lock. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention after installation.

[0015] Figure 2 This is a three-dimensional structural diagram of the needle valve of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the lock in the locked state of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the lock in the open state of this utility model.

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the locking block of this utility model.

[0019] In the diagram: 1. Needle valve; 2. Hollow handwheel; 3. Pipe; 4. Lock frame; 5. Pressure plate; 6. Rubber block; 7. Locking ring; 8. Locking plate; 9. Locking block; 10. Rubber sheet; 11. Lock hole; 12. Pressure block; 13. Insertion hole; 14. Wedge block; 15. Storage tube; 16. External spring; 17. Internal spring; 18. Locking pin; 19. Tooth groove; 20. U-shaped locking rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Please see Figures 1 to 5 This utility model provides a technical solution: a valve lock for a needle valve in a power plant, including a needle valve 1 and a lock frame 4. Both ends of the needle valve 1 are fixedly connected to pipes 3. A hollow handwheel 2 is provided on one side of the needle valve 1. Locking blocks 9 are provided symmetrically on the left and right side walls of the lock frame 4. Locking blocks 9 are provided with lock holes 11. A U-shaped locking rod 20 is inserted into the lock hole 11. The middle part of the U-shaped locking rod 20 passes through the hollow inside the hollow handwheel 2. A pressure plate 5 is hinged to one side of the locking frame 4, which is symmetrical to the locking block 9. A locking plate 8 is provided at the end of the pressure plate 5. A round hole is provided in the middle of the locking plate 8. A pair of locking rings 7 are provided on the outer wall of the locking block 9. The locking rings 7 cooperate with the locking plate 8 to lock the pressure plate 5. A rubber sheet 10 is provided on the inner wall of the locking frame 4. A rubber block 6 is provided on one side of the pressure plate 5, which is pressed against the needle valve 1.

[0022] The locking block 9 has a storage tube 15 inside. The bottom of the storage tube 15 penetrates the top wall of the lock hole 11. A locking pin 18 is inserted into one end of the storage tube 15 facing the lock hole 11. The upper and lower sides of the U-shaped locking rod 20 are provided with tooth grooves 19. The end of the locking pin 18 is provided with oblique teeth that cooperate with the tooth grooves 19 for locking.

[0023] Both the U-shaped locking rod 20 and the locking frame 4 are made of 304 stainless steel, which can withstand high temperatures above 120℃ and has a thickness greater than 8mm. The surface is polished to prevent dust accumulation. The rubber block 6 and the rubber sheet 10 are both at least 5mm thick, can withstand high temperatures of 150℃, and have an elasticity coefficient ≥5MPa. This increases the friction with the pipe 5 and avoids damage to the outer wall of the pipe at high temperatures.

[0024] In this embodiment, by placing the locking frame 4 outside the needle valve 1, and inserting a rubber block 6 between the pressure plate 5 and the needle valve 1, the pressure plate 5 rotates to place the locking plate 8 between the two locking rings 7. By pressing the pressure plate 5, the round hole on the locking plate 8 can be aligned with the locking ring 7. The pressure plate 5 is then locked with a padlock, which presses the rubber block 6 onto the needle valve 1. After locking both pressure plates 5, the locking frame 4 can be fixed.

[0025] Specifically, such as Figure 5 As shown, the end of the locking pin 18 away from the lock hole 11 is inserted into the interior of the storage tube 15, and the interior of the storage tube 15 is provided with an internal spring 17 that presses the locking pin 18 downward out of the storage tube 15.

[0026] After the lock frame 4 is fixed, insert both ends of the U-shaped lock rod 20 into the hollowed-out parts of the hollowed-out handwheel 2, and then insert the ends into the lock hole 11, as shown. Figure 5 As shown, by utilizing the engagement of the groove 19 with the helical teeth at the end of the locking pin 18, the internal spring 17 can be compressed upward by the helical teeth when the U-shaped locking rod 20 is inserted. This allows the U-shaped locking rod 20 to be inserted into the lock hole 11, and also locks the groove 19 with the helical teeth to prevent the U-shaped locking rod 20 from being pulled out.

[0027] Specifically, the side wall of the locking block 9 is provided with a plug hole 13, the side wall of the pressing plate 5 is provided with a pressing block 12 that is inserted into the plug hole 13, the top of the storage tube 15 is fixedly connected with a wedge block 14, and the bottom edge of the wedge block 14 is fixedly connected with an external spring 16 that pushes the wedge block 14 upward into the plug hole 13. The top of the wedge block 14 is a wedge-shaped inclined surface, and the upper and lower edges of the clamping plate 5 are provided with chamfers that cooperate with the wedge-shaped inclined surface. The length of the clamping block 12 is half the length of the insertion hole 13.

[0028] like Figure 4 and Figure 5 As shown, when the clamping plate 5 is locked on the lock frame 4, since the clamping block 12 is chamfered and the length of the clamping block 12 is half the length of the insertion hole 13, the clamping block 12 can be smoothly inserted into the insertion hole 13. While pressing the clamping plate 5, the chamfer on the clamping block 12 can also be used to cooperate with the inclined surface at the top of the wedge block 14 to press down the wedge block 14, so that the locking pin 18 can cooperate with the tooth groove 19. In addition, after the padlock is opened, rotating the clamping plate 5 will allow the clamping block 12 to be pulled out from the lock hole 11. Under the action of the external spring 16, the wedge block 14 is pushed upward. Since the top of the locking pin 18 is provided with a disc that limits the position inside the storage tube 15, when the storage tube 15 moves upward, it will drive the locking pin 18 to move upward as well, so that the U-shaped locking rod 20 can be easily pulled out, releasing the lock on the needle valve 1, and achieving the purpose of quickly locking and unlocking the needle valve 1.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A valve lock for a needle valve in a power plant, comprising a needle valve (1) and a lock frame (4), wherein a hollow handwheel (2) is provided on one side of the needle valve (1), characterized in that: The left and right sidewalls of the lock frame (4) are symmetrically provided with locking blocks (9), and the locking blocks (9) are provided with lock holes (11). A U-shaped locking rod (20) is inserted into the lock hole (11), and the middle part of the U-shaped locking rod (20) passes through the hollow inside the hollow handwheel (2). The locking block (9) has a storage tube (15) inside. The bottom of the storage tube (15) penetrates the top wall of the lock hole (11). A locking pin (18) is inserted into one end of the storage tube (15) facing the lock hole (11). The upper and lower sides of the U-shaped locking rod (20) are provided with tooth grooves (19). The end of the locking pin (18) is provided with oblique teeth that cooperate with the tooth grooves (19) for locking.

2. The valve lock for a needle valve in a power plant according to claim 1, characterized in that: The locking pin (18) is inserted into the interior of the storage tube (15) at the end away from the lock hole (11). The storage tube (15) is provided with an internal spring (17) that presses the locking pin (18) downward out of the storage tube (15).

3. A valve lock for a needle valve in a power plant according to claim 1, characterized in that: A pressure plate (5) is hinged to one side of the lock frame (4) symmetrical to the locking block (9). A locking plate (8) is provided at the end of the pressure plate (5). A round hole is provided in the middle of the locking plate (8). A pair of locking rings (7) are provided on the outer wall of the locking block (9). The locking rings (7) cooperate with the locking plate (8) to lock the pressure plate (5).

4. A valve lock for a needle valve in a power plant according to claim 3, characterized in that: The locking block (9) has a plug hole (13) on its side wall. The pressing plate (5) has a pressing block (12) that can be inserted into the plug hole (13) on its side wall. The top of the storage tube (15) is fixedly connected to a wedge block (14). The bottom edge of the wedge block (14) is fixedly connected to an external spring (16) that pushes the wedge block (14) upward into the plug hole (13).

5. A valve lock for a needle valve in a power plant according to claim 4, characterized in that: The top of the wedge block (14) is a wedge-shaped inclined surface, and the upper and lower edges of the clamping plate (5) are provided with chamfers that cooperate with the wedge-shaped inclined surface. The length of the clamping block (12) is half the length of the insertion hole (13).

6. A valve lock for a needle valve in a power plant according to claim 1, characterized in that: The inner wall of the lock frame (4) is provided with a rubber sheet (10), and a rubber block (6) is provided on one side of the pressing plate (5) to press against the needle valve (1).

7. A valve lock for a needle valve in a power plant according to claim 1, characterized in that: Both ends of the needle valve (1) are fixedly connected to pipes (3).

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