A switch cabinet and a movable door locking device

Abstract

The present invention relates to the technical field of valve structures, and discloses a switch cabinet and a valve locking device, comprising a valve structure and a locking structure. The valve structure comprises a valve body that is longitudinally movably assembled on the switch cabinet. The locking structure comprises a locking plate that is movably assembled in the switch cabinet, a transmission shaft that is transmission-connected to the locking plate, and a driving handle that drives the transmission shaft. The valve body is provided with a bayonet, and the locking plate is provided with a buckle that engages with the bayonet. During its movement, the locking plate has a locking position in which the buckle engages with the bayonet to lock the valve body and an unlocking position in which the buckle disengages from the bayonet to unlock the valve body. An operator drives the transmission shaft to move in the switch cabinet through the driving handle, and the transmission shaft drives the locking plate to move in the switch cabinet. The buckle of the locking plate engages with the buckle on the valve body, thereby locking the valve body and locking the position of the valve body. This ensures the stability of the valve in its working state and prevents sliding or falling off, thereby improving the reliability of the valve and the switch cabinet.

Description

Technical Field

[0001] The present invention relates to the technical field of valve structures, in particular to a switch cabinet and a valve locking device. Background Art

[0002] With the development of science and technology, power equipment is being used more and more widely, and people are increasingly concerned about the safety and reliability of power equipment. A ring main unit (KYN) is a set of electrical equipment (high-voltage switchgear) installed in a metal or non-metallic insulated cabinet or assembled into a partitioned ring main unit. The ring main unit is divided into different compartments by valves, which also facilitate maintenance.

[0003] The Chinese utility model patent with authorization announcement number CN203056438U discloses a locking device for a valve in an armored removable metal-enclosed switchgear. The locking device is located between the valve mechanism and the inner wall of the equipment, and includes a main body bracket. A fixed plate is formed on the crossbeam of the main body bracket, and a movable plate is installed on the fixed plate. A spring is sleeved on the sliding rod between the movable plate and the fixed plate, and the movable plate is provided with two locking pins. A lock hole is respectively provided on the upper connecting plate and the lower connecting plate of the valve mechanism, and a lock hole is also provided on the base; a slider is respectively provided on the two arms of the main body bracket, and the slide groove of each slider extends along the length direction of the arm. Two positioning rods are positioned on the arm, and one end of another spring is fixed to the slider, and the other end is fixed to one of the positioning rods. One end of the slider is provided with a bevel, and the other end is provided with a baffle.

[0004] The above-mentioned valve locking device in the opening device realizes automatic locking and unlocking by withdrawing or pushing forward the circuit breaker trolley, and locks the valve by the cooperation of the lock pin and the lock hole, thereby realizing the interlocking of the valve and the circuit breaker trolley.

[0005] The valve mechanisms of existing medium-voltage KYN cabinets all open in a sliding manner. The valves in the working state rely on complex linkages to maintain their position. During actual use, affected by the operating environment, vibration, etc., the valves may slide or fall off, affecting the reliability of the valves and the switch cabinet. Summary of the Invention

[0006] The purpose of the present invention is to provide a valve locking device to solve the problem in the prior art that the valve may slide or fall off during use, affecting the reliability of the valve and the switch cabinet; the present invention also provides a switch cabinet using the valve locking device.

[0007] In order to achieve the above-mentioned purpose, the present invention provides a valve locking device, including a valve structure and a locking structure connected to the valve structure, the valve structure including a valve body movably assembled on the switch cabinet, the locking structure including a locking plate movably assembled in the switch cabinet, a transmission shaft transmission-connected to the locking plate and a driving handle for driving the transmission shaft, the valve body is provided with a bayonet, the locking plate is provided with a buckle engaged with the bayonet, and the locking plate has a locking position in which the buckle is engaged with the bayonet to lock the valve body and an unlocking position in which the buckle is disengaged from the bayonet to unlock the valve body during its movable stroke.

[0008] Preferably, the locking plate is horizontally movably assembled in the switch cabinet, and a driving member connected to the locking plate is arranged at the end of the transmission shaft away from the driving handle, and the driving member is used to drive the locking plate to move horizontally; the clips are arranged in two groups at intervals along the upper and lower directions on the locking plate, and the two groups of clips correspond to the working position and the test position of the valve body respectively.

[0009] Preferably, the transmission shaft is rotatably assembled in the switch cabinet, a driving hole is provided on the locking plate, and the driving member is a cam matched with the driving hole.

[0010] Preferably, the driving hole is a long hole extending in the up-down direction.

[0011] Preferably, the bayonet is arranged on both left and right ends of the valve body, the locking pieces are arranged on the left and right sides of the valve body respectively, and the two groups of locking pieces are connected by a connecting plate.

[0012] Preferably, the valve locking device also includes a circuit breaker trolley interlocked with the valve body, an interlocking part is connected to the transmission shaft, and an interlocking groove for inserting the interlocking part is arranged on the circuit breaker. When the transmission shaft drives the locking plate to be in a locked position, the interlocking part is inserted into the interlocking groove, and when the transmission shaft drives the locking plate to be in an unlocked position, the interlocking part is disengaged from the interlocking groove.

[0013] Preferably, two groups of interlocking grooves are arranged on the circuit breaker trolley at intervals along the front-to-back direction, and the two groups of interlocking grooves correspond one-to-one to the working position and the test position of the valve body.

[0014] Preferably, three groups of limiting columns are coaxially arranged on the circuit breaker trolley, and the three groups of limiting columns are spaced apart in the front-to-back direction, and the interval between two adjacent groups of limiting columns forms the interlocking groove.

[0015] The present invention further provides a switch cabinet, comprising a cabinet body and a valve locking device arranged in the cabinet body, wherein the valve locking device is the valve locking device described in any of the above technical solutions.

[0016] Compared with the prior art, the switch cabinet and valve locking device of the embodiment of the present invention has the following beneficial effects: since the locking plate of the locking structure is movably assembled in the switch cabinet, the locking plate has a locking position for locking the valve body and an unlocking position for unlocking the valve body during the movable stroke. When the valve is working, the operator drives the drive shaft to move in the switch cabinet through the driving handle, and the drive shaft drives the locking plate to move in the switch cabinet. The buckle of the locking plate is engaged with the buckle on the valve body, thereby locking the valve body and locking the position state of the valve body, ensuring the stability of the valve in the working state, and preventing sliding and falling off, thereby improving the reliability of the valve and the switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the sliding door locking device of the present invention;

[0018] Figure 2 yes Figure 1 An exploded schematic diagram of a valve locking device;

[0019] Figure 3 yes Figure 2 An enlarged schematic diagram of point A of the valve locking device.

[0020] In the figure, 1. valve structure; 11. valve body; 12. guide rail; 13. bayonet; 2. locking plate; 21. buckle; 211. test position buckle; 212. working position buckle; 22. drive hole; 3. transmission shaft; 4. drive handle; 5. cam; 6. crank arm; 7. interlocking shaft; 8. connecting plate; 9. circuit breaker trolley; 91. interlocking slot; 92. limit column. DETAILED DESCRIPTION

[0021] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0022] A preferred embodiment of a shutter locking device of the present invention is as follows Figures 1 to 3 As shown, the valve locking device includes a valve structure 1 and a locking structure. The valve structure 1 is connected to the locking structure. The locking structure is used to lock the position of the valve structure 1 when the valve structure 1 is working.

[0023] The valve structure 1 includes a valve body 11, which is longitudinally movable and assembled on the switchgear. Guide rails 12 are arranged on the left and right sides of the switchgear for guiding the valve bodies 11. There are two sets of valve bodies 11, which are spaced apart in the vertical direction. When the valve bodies 11 move longitudinally, they can open or close the openings in the partition of the switchgear. When the valve bodies 11 open the openings, the valve bodies 11 are in the working position. When the valve bodies 11 close the openings, the valve bodies 11 are in the test position.

[0024] The locking structure includes a locking plate 2, a drive shaft 3, and a drive handle 4. The locking plate 2 is movably mounted within the switch cabinet and, when moved within the switch cabinet, is used to lock or unlock the valve body 11. The drive shaft 3 is in driving connection with the locking plate 2, and the drive handle 4 is fixedly connected to the drive shaft 3. The drive shaft 3 extends to the outside of the switch cabinet, and the drive handle 4 is fixed to the end of the drive shaft 3 located outside the switch cabinet. The drive handle is used by the operator to drive the drive shaft 3, thereby driving the locking plate 2 to lock or unlock the valve body 11.

[0025] The valve body 11 is provided with a latch 13, and the locking plate 2 is provided with a buckle 21 that engages with the latch 13. During its travel, the locking plate 2 has two positions: a locked position, in which the buckle 21 engages with the latch 13 to lock the valve body 11, and an unlocked position, in which the buckle 21 disengages from the latch 13 to unlock the valve body 11. Buckles 21 are provided on the upper and lower sides of the locking plate 2, corresponding to the two sets of valve bodies 11. When the locking plate 2 is in the locked position, the buckle 21 on the locking plate 2 engages with the latch 13 on the valve body 11, locking the valve body 11 in place. When the locking plate 2 is in the unlocked position, the buckle 21 on the locking plate 2 disengages from the latch 13 on the valve body 11, allowing the valve body 11 to move up and down.

[0026] When the valve is working, the operator drives the transmission shaft 3 to move inside the switch cabinet by driving the handle 4, and the transmission shaft 3 drives the locking plate 2 to move inside the switch cabinet. The buckle 21 of the locking plate 2 is engaged with the buckle 21 on the valve body 11, thereby locking the valve body 11 and locking the position state of the valve body 11, ensuring the stability of the valve in the working state, and preventing sliding or falling off, thereby improving the reliability of the valve and the switch cabinet.

[0027] Preferably, the locking plate 2 is horizontally movably assembled in the switch cabinet, and a driving member connected to the locking plate 2 is arranged at the end of the transmission shaft 3 away from the driving handle 4, and the driving member is used to drive the locking plate 2 to move horizontally; two groups of clips 21 are arranged at intervals in the upper and lower directions of the locking plate 2, and the two groups of clips 21 correspond to the working position and the test position of the valve body respectively.

[0028] The locking plate 2 is assembled horizontally within the switch cabinet, simplifying its trajectory and, consequently, the transmission structure between the drive shaft 3 and the locking plate 2. The valve body 11 has a test position and an operating position during its vertical movement, both of which require locking by the locking plate 2. Two sets of latches 21 are arranged at intervals along the vertical axis of the locking plate 2, respectively locking the valve body 11 in the operating and test positions, preventing it from falling out.

[0029] In this embodiment, two sets of latches 21 are defined: a test position latch 211 and a working position latch 212. The test position latch 211 is located below the working position latch 212 to correspond to the test position and working position of the valve body 11, respectively. When the position of the valve body 11 changes, the latch 21 only needs to move horizontally to lock the valve body 11, which is convenient to use.

[0030] In other embodiments, the locking piece 2 can also move in the vertical direction and the horizontal direction respectively. There is only one set of buckles 21. When the position of the valve body 11 changes, the locking piece 2 moves in the vertical direction to lock the valve body 11 at the corresponding position.

[0031] Preferably, the transmission shaft 3 is rotatably assembled in the switch cabinet, a driving hole 22 is opened on the locking plate 2, and the driving member is a cam 5 that cooperates with the driving hole 22.

[0032] The drive shaft 3 is rotatably assembled. The operator only needs to turn the drive handle 4 to drive the drive shaft 3 and the locking plate 2 horizontally. This simplifies the transmission method and reduces the space occupied by the drive shaft 3 during operation. The drive shaft 3 drives the locking plate 2 horizontally by the cooperation of the cam 5 and the drive hole 22. The outer wall surface of the cam 5 is not circular, so the drive hole 22 periodically swings left and right during rotation. The cam 5 structure is simple as a driving element.

[0033] In other embodiments, the transmission shaft 3 can also be assembled in the switch cabinet in a horizontally movable manner, with the inner end of the transmission shaft 3 fixedly connected to the locking plate 2, and the driving member can be the end surface of the transmission shaft 3. The operator drives the transmission shaft 3 to move horizontally by pushing the driving handle 4 horizontally.

[0034] Preferably, the driving hole 22 is a long hole extending in the up-down direction.

[0035] The vertical dimension of the long hole is larger than the horizontal dimension. The vertical space can compensate for the longitudinal difference of the outer wall when the cam 5 rotates, so that the locking plate 2 only moves horizontally.

[0036] In other embodiments, the driving hole 22 may also be an elliptical hole or an obliquely arranged long hole.

[0037] Preferably, bayonet holes 13 are arranged on both left and right ends of the valve body 11 , and locking plates 2 are arranged on both left and right sides of the valve body 11 , respectively. The two groups of locking plates 2 are connected by a connecting plate 8 .

[0038] The two sets of locking plates 2 are respectively engaged with the bayonet holes 13 at the left and right ends of the valve body 11, locking the left and right ends of the valve body 11 respectively, which can increase the stability of the valve body 11 when it is locked and prevent the valve body 11 from shifting to one side; in other embodiments, there can be only one set of locking plates 2.

[0039] Preferably, the valve locking device also includes a circuit breaker trolley 9 interlocked with the valve body 11, an interlocking part is connected to the transmission shaft 3, and an interlocking groove 91 for inserting the interlocking part is arranged on the circuit breaker. When the transmission shaft 3 drives the locking plate 2 to be in the locked position, the interlocking part is inserted into the interlocking groove 91, and when the transmission shaft 3 drives the locking plate 2 to be in the unlocked position, the interlocking part is disengaged from the interlocking groove 91.

[0040] The transmission shaft 3 drives the interlocking piece to move while driving the locking plate 2 to move. When the transmission shaft 3 drives the locking plate 2 to the locked position, the interlocking piece is inserted into the interlocking groove 91, limiting the forward and backward movement of the circuit breaker trolley 9, that is, when the valve body 11 is locked, the circuit breaker trolley 9 will not be rocked in and out forward and backward; when the transmission shaft 3 drives the locking plate 2 to the unlocked position, the interlocking piece is disengaged from the interlocking groove 91, and the circuit breaker trolley 9 can move forward and backward.

[0041] Through the cooperation of the interlocking member and the interlocking groove 91, when the valve body 11 is locked by the locking plate 2, the circuit breaker trolley 9 cannot be shaken in or out. Only when the valve body 11 is unlocked can the staff shake the circuit breaker trolley 9 in or out, thereby realizing the interlocking of the locking structure and the circuit breaker trolley 9 and preventing the valve body 11 from being damaged.

[0042] Preferably, two groups of interlocking grooves 91 are arranged on the circuit breaker trolley 9 at intervals along the front-to-back direction, and the two groups of interlocking grooves 91 correspond one-to-one to the working position and the test position of the valve body 11 .

[0043] Since the valve body 11 has two positions, the working position and the test position, each position will be locked by the locking piece 2, and the front and rear positions of the circuit breaker trolley 9 are different when the position of the valve body 11 changes. Therefore, the two interlocking grooves 91 of the circuit breaker trolley 9 can make the circuit breaker trolley 9 interlock with the locking structure when the valve body 11 is in different positions, among which the interlocking groove 91 corresponding to the test position is located on the inner side, and the interlocking groove 91 corresponding to the working position is located on the outer side.

[0044] Preferably, three groups of limiting columns 92 are coaxially arranged on the circuit breaker trolley 9 . The three groups of limiting columns 92 are spaced apart in the front-to-back direction, and the intervals between two adjacent groups of limiting columns 92 form interlocking slots 91 .

[0045] The limiting posts 92 have high structural strength. By utilizing the intervals between the limiting posts 92 to form the interlocking grooves 91 , the structural strength of the interlocking member and the interlocking grooves 91 can be ensured, thereby improving safety.

[0046] Preferably, the interlocking member includes an interlocking shaft 7 and a crank arm 6. The crank arm 6 is welded to the transmission shaft 3, and the interlocking shaft 7 is welded to the crank arm 6. The crank arm 6 and the interlocking shaft 7 have a strong structural strength. At the same time, the length of the interlocking shaft 7 can also be used to compensate for the distance between the circuit breaker trolley 9 and the transmission shaft 3. The structure is simple and easy to use.

[0047] The present invention also provides a switch cabinet, comprising a cabinet body and a valve locking device arranged in the cabinet body. The specific structure of the valve locking device is the same as the specific structure of the valve locking device in any of the above embodiments, and will not be repeated here.

[0048] In summary, the embodiments of the present invention provide a switch cabinet and a valve locking device, in which the locking plate of the locking structure is movably assembled in the switch cabinet, and the locking plate has a locking position for locking the valve body and an unlocking position for unlocking the valve body during the movable stroke. When the valve is working, the operator drives the drive shaft to move in the switch cabinet through the driving handle, and the drive shaft drives the locking plate to move in the switch cabinet. The buckle of the locking plate is engaged with the buckle on the valve body, thereby locking the valve body and locking the position state of the valve body, ensuring the stability of the valve in the working state, and preventing sliding and falling off, thereby improving the reliability of the valve and the switch cabinet.

[0049] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A valve locking device, characterized in that: The invention comprises a valve structure and a locking structure connected to the valve structure, wherein the valve structure comprises a valve body movably assembled on the switch cabinet, and guide rails for guiding and assembling with the valve body are respectively arranged on the left and right sides of the switch cabinet. The locking structure comprises a locking plate movably assembled in the switch cabinet, a transmission shaft connected to the locking plate and a driving handle for driving the transmission shaft. A bayonet is provided on the valve body, and a buckle engaged with the bayonet is arranged on the locking plate. The locking plate has a buckle engaged with the bayonet in the movable stroke to lock the locking position of the valve body and the buckle is disengaged from the buckle. The valve body is unlocked to unlock the unlocking position of the valve body, the valve locking device also includes a circuit breaker trolley interlocked with the valve body, the transmission shaft is connected to an interlocking piece, the circuit breaker is provided with an interlocking groove for inserting the interlocking piece, the transmission shaft drives the locking piece to be in the locked position, the interlocking piece is inserted into the interlocking groove, and the transmission shaft drives the locking piece to be in the unlocking position, the interlocking piece is disengaged from the interlocking groove, and three groups of limiting columns are coaxially arranged on the circuit breaker trolley, the three groups of limiting columns are arranged at intervals in the front-to-back direction, and the intervals between two adjacent groups of limiting columns form the interlocking groove.

2. The shutter locking device according to claim 1, characterized in that: The locking plate is assembled in the switch cabinet for horizontal movement, and a driving member connected to the locking plate is arranged at the end of the transmission shaft away from the driving handle, and the driving member is used to drive the locking plate to move horizontally; two groups of clips are arranged at intervals along the upper and lower directions of the locking plate, and the two groups of clips correspond to the working position and the test position of the valve body respectively.

3. The shutter locking device according to claim 2, characterized in that: The transmission shaft is rotatably assembled in the switch cabinet, a driving hole is opened on the locking plate, and the driving member is a cam matched with the driving hole.

4. The shutter locking device according to claim 3, characterized in that: The driving hole is a long hole extending in the up-down direction.

5. The sliding door locking device according to any one of claims 1 to 4, characterized in that: The bayonet holes are arranged on both the left and right ends of the valve body, and the locking pieces are arranged on the left and right sides of the valve body respectively, and the two groups of locking pieces are connected by a connecting plate.

6. The sliding door locking device according to any one of claims 1 to 4, characterized in that: The interlocking grooves are arranged in two groups at intervals along the front-to-back direction on the circuit breaker trolley, and the two groups of interlocking grooves correspond one to one with the working position and the test position of the valve body.

7. A switch cabinet comprising a cabinet body and a door locking device arranged in the cabinet body, characterized in that: The valve locking device is the valve locking device according to any one of claims 1 to 6.

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