Logic locking device for power station valve

Abstract

The utility model discloses a logic locking device for a power station valve, which belongs to the technical field of power station safety and comprises a lock body, a lock head is inserted into the top of the lock body, an overhaul key is inserted into one side of the lock body, a first spring bolt is arranged on one side of the overhaul key, and an operation key is inserted into the other side of the lock body. An extension spring is arranged at the top of the operation key, a second spring bolt is arranged at the top of the extension spring, a connecting plate is arranged at the bottom of the side, close to the first spring bolt, of the second spring bolt, a lock pin is arranged at the top of the side, close to the first spring bolt, of the second spring bolt, and a lock body groove matched with the lock head is formed in the top of the lock body. The lock body is provided with a lock body groove, the lock head is inserted into the lock body groove, and one side of the lock body is provided with a maintenance lock hole matched with the maintenance key, and the problem that after an operator closes the partition valve, the risk that the operator operates the partition valve by mistake still exists, so that personal casualty accidents of maintainers are caused is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power plant safety, in particular to a logic locking device for power station valves. Background Art

[0002] Despite the rapid development of the power industry, safety has always been the primary task of power production. During the maintenance of the thermal system equipment of the power plant, the system isolation valves must be closed to prevent the leakage of medium such as steam and water in the system after the equipment is disassembled, which may cause personal injury or death.

[0003] However, after the operating personnel close the isolation valve, there is still a risk of human error in operating the isolation valve, which may cause personal injury or death to the maintenance personnel. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a logic locking device for power station valves, which can solve the problem that after the operating personnel close the isolation valve, there is still a risk of human error in operating the isolation valve, thereby causing personal injury accidents to the maintenance personnel.

[0006] In order to solve the above technical problems, the utility model provides a logic locking device for power station valves, adopting the following technical scheme: comprising a lock body, a lock head is inserted on the top of the lock body, a maintenance key is inserted on one side of the lock body, a first lock tongue is provided on one side of the maintenance key, an operating key is inserted on the other side of the lock body, a tension spring is provided on the top of the operating key, a second lock tongue is provided on the top of the tension spring, a connecting plate is provided on the bottom of the second lock tongue close to the first lock tongue, and a lock nail is provided on the top of the second lock tongue close to the first lock tongue.

[0007] Optionally, a lock body groove matched with a lock head is formed on the top of the lock body, and the lock head is inserted into the lock body groove.

[0008] By adopting the above technical solution, the electric gate valve is closed.

[0009] Optionally, a maintenance lock hole adapted for a maintenance key is opened on one side of the lock body, the maintenance key is inserted into the maintenance lock hole, and one side of the maintenance lock hole is connected to the first lock tongue.

[0010] By adopting the above technical solution, the first locking tongue is controlled to rotate.

[0011] Optionally, a fixing plate is provided on a side of the first locking tongue close to the connecting plate, and a connecting groove matched with the fixing plate is provided on a side of the connecting plate close to the first locking tongue.

[0012] By adopting the above technical solution, the connecting plate is driven to move.

[0013] Optionally, an operating lock hole adapted for an operating key is opened on one side of the lock body, the operating key is inserted into the operating lock hole, a top plate is provided on the top of the operating lock hole, and the top of the top plate is connected to a tension spring.

[0014] By adopting the above technical solution, the second locking tongue is controlled to rotate.

[0015] Optionally, a spring groove is provided on one side of the second lock tongue, a limit spring is provided in the spring groove, a sliding plate is provided on one side of the lock pin, one side of the sliding plate is connected to the limit spring, and the sliding plate is slidably connected in the spring groove.

[0016] The locking pins are installed by adopting the above technical solution.

[0017] Optionally, a lock head groove matched with a lock pin is formed on one side of the lock head, and the lock pin is inserted into the lock head groove.

[0018] By adopting the above technical solution, the lock head is limited and fixed, and the power station valve is closed.

[0019] In summary, the utility model includes at least one of the following beneficial effects: the operation process of the locking device is consistent with the arrangement and removal process sequence of the equipment maintenance measures. When the locking device is locked, both maintenance and operation personnel are required to be present at the same time to confirm that the valve status is safe before operation can be carried out, which effectively ensures the reliability of the isolation valve locking and maximizes the safety of personnel and equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0023] Figure 3It is a schematic diagram of the operating structure of the utility model.

[0024] Explanation of the accompanying drawings: 1. lock body; 101. lock body groove; 2. lock head; 201. lock head groove; 3. maintenance key; 301. maintenance lock hole; 4. first lock tongue; 401. fixing plate; 5. operation key; 501. top plate; 502. operation lock hole; 6. tension spring; 7. second lock tongue; 701. spring groove; 702. limit spring; 8. connecting plate; 801. connecting groove; 9. locking pin; 901. sliding plate. DETAILED DESCRIPTION

[0025] The following is combined with Figure 1-3 The utility model is described in further detail.

[0026] Embodiment 1, refer to Figure 1 In order to solve the problem that after the operating personnel close the isolation valve, there is still a risk of human error in operating the isolation valve, which may cause personal injury or death to the maintenance personnel, the utility model discloses a logic locking device for a power station valve, including a lock body 1, a lock head 2 is inserted at the top of the lock body 1, a maintenance key 3 is inserted at one side of the lock body 1, a first lock tongue 4 is provided on one side of the maintenance key 3, an operating key 5 is inserted at the other side of the lock body 1, a tension spring 6 is provided at the top of the operating key 5, a second lock tongue 7 is provided at the top of the tension spring 6, a connecting plate 8 is provided at the bottom of the second lock tongue 7 close to the first lock tongue 4, and a lock nail 9 is provided at the top of the second lock tongue 7 close to the first lock tongue 4.

[0027] Based on the above features, the working principle of this embodiment is: the lock body 1 is a vertebral device, which can effectively prevent human damage to the lock body, insert the lock head 2 into the lock body 1, insert the operating key 5 into the lock body 1, rotate the operating key 5 to drive the second lock tongue 7 to rotate, insert the inspection key 3 into the lock body 1, rotate the inspection key 3 to drive the first lock tongue 4 to rotate, the first lock tongue 4 pushes the connecting plate 8 to move upward, and the connecting plate 8 drives the second lock tongue 7 to move upward, and the lock pin 9 set on the left side of the second 7 limits the lock head 2 to jam the lock head 2.

[0028] Example 2, refer to Figure 1-3In this embodiment, in order to solve the problem that after the operating personnel close the isolation valve, there is still a risk of human error in operating the isolation valve, thereby causing personal injury accidents to the maintenance personnel, based on the same concept as the above-mentioned embodiment one, the logic locking device for power station valves also includes a lock body groove 101 adapted to the lock head 2 on the top of the lock body 1, the lock head 2 is inserted in the lock body groove 101, and a maintenance lock hole 301 adapted to the maintenance key 3 is opened on one side of the lock body 1, the maintenance key 3 is inserted in the maintenance lock hole 301, one side of the maintenance lock hole 301 is connected to the first lock tongue 4, and a fixing plate 401 is provided on the side of the first lock tongue 4 close to the connecting plate 8, and the connecting plate 8 is close to the first lock tongue. A connecting groove 801 adapted to the fixed plate 401 is provided on one side of the lock body 1, an operating lock hole 502 adapted to the operating key 5 is provided on one side of the lock body 1, the operating key 5 is inserted in the operating lock hole 502, a top plate 501 is provided on the top of the operating lock hole 502, the top of the top plate 501 is connected to the tension spring 6, a spring groove 701 is provided on one side of the second lock tongue 7, a limit spring 702 is provided in the spring groove 701, a sliding plate 901 is provided on one side of the lock pin 9, one side of the sliding plate 901 is connected to the limit spring 702, the sliding plate 901 is slidably connected in the spring groove 701, a lock head groove 201 adapted to the lock pin 9 is provided on one side of the lock head 2, and the lock pin 9 is inserted in the lock head groove 201.

[0029] Based on the above features, the working principle of this embodiment is: after the operator operates the isolation valve to close, when the work ticket is issued, the operator will go to the site together with the maintenance personnel to review the safety measures and install a locking device on the isolation valve. At this time, the locking device is in the initial open state, and the locking device lock head 2 is inserted into the lock body groove 101. The operator inserts the operating key 5 into the operating lock hole 502 and rotates it counterclockwise. The operating lock hole 502 drives the tension spring 6 and the second lock tongue 7 to rotate counterclockwise, and the limit spring 702 in the spring groove 701 rotates counterclockwise. The lock is compressed and pressed against the outer edge of the lock head 2. At this time, the locking device is still in the open state. The maintenance personnel insert the maintenance key 3 into the maintenance lock hole 301 and turn it counterclockwise. The maintenance lock hole 301 drives the first lock tongue 4 to rotate upward, so that the connecting plate 8 is forced upward. The connecting plate 8 drives the second lock tongue 7 to move upward, and the tension spring 6 is stretched. The lock pin 9 enters the lock head slot 201 provided on the lock head 2 under the action of the elastic force of the limit spring 702, and the lock head 2 is stuck. Neither the operator nor the maintenance personnel can unilaterally release the locking device;

[0030] When the maintenance personnel completes the maintenance work, they insert the maintenance key 3 into the maintenance lock hole 301 and turn it clockwise before returning the work ticket. The maintenance lock hole 301 drives the first lock tongue 4 to turn downward. At this time, the locking device is still in the locked state, and no one except the operating personnel can release the locking device. When the operating personnel collects the work ticket and prepares to remove the maintenance measures, they insert the operating key 5 into the operating lock hole 502 and turn it clockwise. The operating lock hole 502 drives the tension spring 6 and the second lock tongue 7 to turn clockwise, and the locking pin 9 disengages from the lock head groove 201 provided on the lock head 2, and the tension spring 6 retracts. At this time, the locking device is in a fully open state. The switching operation of the isolation valve can be completed by removing the locking device.

[0031] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A logic locking device for a power station valve, comprising a lock body (1), characterized in that: A lock head (2) is inserted at the top of the lock body (1), a maintenance key (3) is inserted at one side of the lock body (1), a first lock tongue (4) is provided at one side of the maintenance key (3), an operation key (5) is inserted at the other side of the lock body (1), a tension spring (6) is provided at the top of the operation key (5), a second lock tongue (7) is provided at the top of the tension spring (6), a connecting plate (8) is provided at the bottom of the second lock tongue (7) on a side close to the first lock tongue (4), and a lock pin (9) is provided at the top of the second lock tongue (7) on a side close to the first lock tongue (4).

2. A logic locking device for power station valves according to claim 1, characterized in that: The top of the lock body (1) is provided with a lock body groove (101) adapted to the lock head (2), and the lock head (2) is inserted into the lock body groove (101).

3. A logic locking device for power station valves according to claim 1, characterized in that: A maintenance lock hole (301) adapted to a maintenance key (3) is provided on one side of the lock body (1); the maintenance key (3) is inserted into the maintenance lock hole (301); and one side of the maintenance lock hole (301) is connected to a first lock tongue (4).

4. A logic locking device for power station valves according to claim 1, characterized in that: A fixing plate (401) is provided on one side of the first locking tongue (4) close to the connecting plate (8), and a connecting groove (801) adapted to the fixing plate (401) is provided on one side of the connecting plate (8) close to the first locking tongue (4).

5. A logic locking device for power station valves according to claim 1, characterized in that: A running lock hole (502) adapted to the running key (5) is provided on one side of the lock body (1); the running key (5) is inserted into the running lock hole (502); a top plate (501) is provided on the top of the running lock hole (502); and the top of the top plate (501) is connected to a tension spring (6).

6. A logic locking device for power station valves according to claim 1, characterized in that: A spring groove (701) is provided on one side of the second locking tongue (7), a limit spring (702) is provided in the spring groove (701), a sliding plate (901) is provided on one side of the locking pin (9), one side of the sliding plate (901) is connected to the limit spring (702), and the sliding plate (901) is slidably connected in the spring groove (701).

7. A logic locking device for power station valves according to claim 1, characterized in that: A lock head groove (201) adapted to the lock pin (9) is provided on one side of the lock head (2), and the lock pin (9) is inserted into the lock head groove (201).

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