Grounding knife-switch contact locking device

Abstract

The utility model relates to the technical field of substation safety measures, in particular to a grounding knife-switch contact locking device, which comprises a knife-switch contact and a locking device arranged on the knife-switch contact, a convex plate is arranged on the knife-switch contact, the locking device comprises a locking support frame and a locking assembly, the locking support frame comprises a partition plate, a connecting plate and a supporting block, and the connecting plate is arranged on the partition plate. The connecting plate is arranged between the partition plate and the supporting block, the supporting block is provided with a groove, when the locking supporting frame is connected with the disconnecting link contact, the connecting plate is inserted into the disconnecting link contact, one end of the partition plate faces the direction of the static contact, the protruding plate extends into the groove, the locking assembly is arranged at the position of the supporting block, and the locking assembly penetrates through the supporting block and the protruding plate. The locking device is designed according to the shape of the disconnecting link contact, so that the connection between the locking device and the disconnecting link contact is more stable and firmer, and the problem of unreliable locking of the grounding transformer disconnecting link of the power station is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer substation safety measures, in particular to a grounding switch contact locking device. Background Art

[0002] During power station maintenance, the generator's neutral-point grounding switch must be opened and mechanically locked to prevent contact between the moving and static contacts. Existing grounding switch locking devices, due to structural differences, struggle to achieve fully reliable locking. This can lead to personnel accidentally operating the equipment and closing the grounding switch, resulting in safety measures failing to meet maintenance requirements. This poses a serious threat to operator safety and poses a significant risk to power production safety.

[0003] In the prior art, a clamping device is used to clamp the outer side of the knife switch contact to prevent the knife switch contact from contacting the static contact. However, due to the protrusions on both sides of the knife switch contact, the contact surface between the clamping device and the knife switch contact is small, and the two will separate during the clamping process, making it difficult to achieve reliable locking. If the operator mistakenly operates the equipment, the safety measures will not meet the maintenance requirements, which may also lead to the occurrence of safety accidents. Utility Model Content

[0004] In view of the technical problems existing in the background technology, the purpose of the present invention is to provide a grounding knife switch contact locking device, which can lock the knife switch contact efficiently and stably, thereby avoiding the occurrence of workers' misoperation.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] A grounding knife switch contact locking device includes a knife switch contact and a locking device arranged on the knife switch contact, the knife switch contact is provided with a convex plate, the locking device includes a locking support frame and a locking assembly, the locking support frame includes a partition, a connecting plate and a support block, the connecting plate is arranged between the partition and the support block, and a groove is provided on the support block. When the locking support frame and the knife switch contact are connected, the connecting plate is inserted into the knife switch contact, one end of the partition is facing the static contact point, and the convex plate extends into the groove. The locking assembly is arranged at the support block position, and the locking assembly passes through the support block and the convex plate.

[0007] Preferably, a connection hole I is provided on the support block, and the connection hole I is provided at the groove position, the connection hole I passes through the support block, and a connection hole II is provided on the convex plate, and the connection hole I and the connection hole II are aligned.

[0008] Preferably, the locking assembly includes a support column and a telescopic member, wherein the support column is arranged at the position of the connecting hole I, and the telescopic member is rotatably arranged inside the support column.

[0009] Preferably, the telescopic member includes a cylinder and a telescopic column, the telescopic column is arranged in the cylinder, a limiting rod is provided on the telescopic column, a spiral groove is provided on the cylinder, the limiting rod is arranged in the groove, and when the cylinder rotates, the limiting rod slides along the direction of the groove.

[0010] Preferably, an opening is provided at one end of the support column, a locking block is provided at one end of the cylinder, a limiting hole I is provided in the opening, a limiting hole II is provided in the locking block, and the limiting hole I and the limiting hole II are aligned.

[0011] Preferably, a locking rod and a spring are provided in the limiting hole II, the spring supports the locking rod, and the locking rod extends into the limiting hole I.

[0012] Preferably, the locking block is provided with a key, and the key is provided with a magnetic structure. When one end of the key is fully inserted into the locking block, the magnetic structure is aligned with the limiting hole II, driving the locking rod to leave the limiting hole I.

[0013] The utility model has the following advantages and beneficial effects:

[0014] In the utility model, the locking device is designed according to the shape of the knife switch contact, so that the connection between the locking device and the knife switch contact is more stable and firm, which solves the problem of unreliable locking of the grounding transformer knife switch of the power station. Only a special key is needed to unlock it, and the cylinder is rotated to move the telescopic column back and forth to achieve the installation and disassembly of the locking device. It has the advantages of convenient operation, beautiful appearance, and easy carrying. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural diagram of a grounding switch contact locking device provided by the utility model;

[0016] Figure 2 This is a schematic diagram of the knife switch contact structure of a grounding knife switch contact locking device provided by the utility model;

[0017] Figure 3 It is for Figure 1 Structural diagrams from other perspectives;

[0018] Figure 4 This is a structural diagram of a grounding switch contact locking device provided by the utility model;

[0019] Figure 5 This is a schematic diagram of the support column structure of a grounding knife switch contact locking device provided by the utility model;

[0020] Figure 6 This is a structural diagram of a cylinder of a grounding knife switch contact locking device provided by the utility model;

[0021] Figure 7 This is a structural diagram of a telescopic column of a grounding knife switch contact locking device provided by the utility model;

[0022] Figure 8 This is a schematic diagram of the connection of a locking block of a grounding knife switch contact locking device provided by the present invention;

[0023] Figure 9 This is a schematic diagram of the connection between the locking rod and the spring of a grounding knife switch contact locking device provided by the utility model;

[0024] Figure 10 This is a schematic diagram of the key structure of a grounding knife switch contact locking device provided by the utility model;

[0025] Icons: 1-knife switch contact, 2-convex plate, 21-connecting hole II, 3-connecting plate, 31-partition, 32-support block, 33-groove, 34-connecting hole I, 4-support column, 41-opening, 42-limiting hole I, 43-limiting hole III, 5-cylinder, 51-slide, 6-locking block, 61-limiting hole II, 7-telescopic column, 71-limiting rod, 8-locking rod, 81-spring, 9-key, 91-magnetic structure, A-locking support frame. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the drawings 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.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0028] Example

[0029] like Figure 1-4As shown, a grounding knife switch contact locking device includes a knife switch contact 1 and a locking device arranged on the knife switch contact 1, a convex plate 2 is provided on the knife switch contact 1, and the locking device includes a locking support frame A and a locking assembly. The locking support frame A includes a partition 31, a connecting plate 3 and a support block 32. The connecting plate 3 is arranged between the partition 31 and the support block 32, and a groove 33 is provided on the support block 32. When the locking support frame A and the knife switch contact 1 are connected, the connecting plate 3 is inserted into the knife switch contact 1, one end of the partition 31 is facing the static contact point, and the convex plate 2 extends into the groove 33. The locking assembly is arranged at the position of the support block 32, and the locking assembly passes through the support block 32 and the convex plate 2, and is used to fix the support block 32 and the convex plate 2 as a whole.

[0030] like Figure 1 、 2 As shown in Figures 3, 6, and 7, a connecting hole I34 is provided on the support block 32, and the connecting hole I34 is provided at the position of the groove 33. The connecting hole I34 passes through the support block 32, and a connecting hole II21 is provided on the convex plate 2. The connecting hole I34 and the connecting hole II21 are aligned. The locking assembly includes a support column 4 and a telescopic member. The support column 4 is provided at the position of the connecting hole I34. The support column 4 is fixed on one side of the support block 32. The telescopic member is rotatably provided inside the support column 4. The telescopic member includes a cylinder 5 and a telescopic column 7. A notch is provided on one side of the cylinder 5. The telescopic column 7 is provided in the cylinder 5. A limiting rod 71 is provided on the telescopic column 7. A spiral groove 51 is provided on the cylinder 5. The rod 71 is set in the slide groove 51, and the end of the limit rod 71 extends from the slide groove 51 and is slidably set on the side wall of the notch, thereby limiting the limit rod 71 to prevent the telescopic column 7 from rotating. When the cylinder 5 rotates, the telescopic column 7 is limited and cannot rotate, and the rotational movement of the cylinder 5 is converted into the linear motion of the telescopic column 7. The limit rod 71 slides along the direction of the slide groove 51, and the telescopic column 7 performs a linear reciprocating motion. When the telescopic column 7 extends from the cylinder 5, it extends into the connecting hole I34 and the connecting hole II21, so that the knife switch contact 1 and the locking device are fixed. The locking device is designed according to the structure of the knife switch contact 1, which can not only be connected to the knife switch contact 1 more closely, but also make the connection method simpler.

[0031] like Figure 1 、 5As shown in Figures 6 and 7, an opening 41 is provided at one end of the support column 4, a locking block 6 is provided at one end of the cylinder 5, a limiting hole Ⅰ42 is provided in the opening 41, a limiting hole Ⅱ61 is provided in the locking block 6, the limiting hole Ⅰ42 and the limiting hole Ⅱ61 are aligned, a locking rod 8 and a spring 81 are provided in the limiting hole Ⅱ61, the spring 81 supports the locking rod 8, and the locking rod 8 extends into the limiting hole Ⅰ42. When in the initial position, the locking rod 8 extends into the limiting hole Ⅰ42, and the cylinder 5 and the support column 4 cannot rotate, and the telescopic column 7 cannot be moved in the cylinder. 5, another limiting hole III 43 is provided in the opening 41. When the limiting rod 71 is close to the locking block 6, the locking rod 8 is located at the limiting hole I 42. When the limiting rod 71 gradually moves away from the locking block 6 and the telescopic column 7 passes through the connecting hole II 21, the locking rod 8 is located at the limiting hole III 43. The limiting hole I 42 is provided on the support column 4 and is provided at the initial position of the stroke of the limiting rod 71. The limiting hole III 43 is provided on the support column 4 and is provided at the end position of the stroke of the limiting rod 71.

[0032] like Figure 1 、 4 As shown in , 6 and 7, the lock block 6 is equipped with a key 9, and the key 9 is provided with a magnetic structure 91. The magnetic structure 91 and the lock rod 8 are arranged in cooperation. When one end of the key 9 is fully extended into the lock block 6, the magnetic structure 91 and the limiting hole II 61 are aligned. The magnetic structure 91 drives the lock rod 8 to move toward the magnetic structure 91. The lock rod 8 compresses the spring 81 and leaves the limiting hole I 42. At this time, the key 9 is rotated and the cylinder 5 can rotate with the key 9.

[0033] When the knife switch contact 1 needs to be repaired, the moving contact (knife switch contact 1) and the static contact are disconnected, the locking device and the knife switch contact 1 are connected, the connecting plate 3 is inserted into the knife switch contact 1, and the partition 31 faces the static contact. At this time, the connecting hole I34 and the connecting hole II21 are aligned, and the telescopic column 7 is also aligned with the connecting hole I34 and the connecting hole II21. The key 9 is inserted into the lock block 6. When the head of the key 9 is fully extended into the lock block 6, the magnetic structure 91 and the limiting hole II61 are aligned. The magnetic structure 91 pulls the locking rod 8 out of the limiting hole II61 through magnetic force, and the spring 81 is compressed. The key 9 is rotated, and the key 9 drives the lock block 6 to rotate, and then drives the cylinder 5 to rotate. The limiting rod 71 is in the slide groove 51. As the cylinder 5 rotates, it moves toward the connecting hole II 21, and the telescopic column 7 continuously extends from the cylinder 5 and is inserted into the connecting hole I 34 and the connecting hole II 21. When the locking rod 8 rotates to the position of the limit hole III 43, the telescopic column 7 is completely extended into the connecting hole I 34 and the connecting hole II 21, and the knife switch contact 1 and the locking device are fixed. At this time, the key 9 is pulled out, the magnetic structure 91 and the locking rod 8 are separated, and the spring 81 rebounds to make the locking rod 8 extend into the limit hole III 43. At this time, the cylinder 5 will not be able to rotate. This method allows workers to unlock the lock only by inserting the key 9, preventing operators from accidentally operating the equipment, making the safety measures fail to meet the maintenance requirements, and avoiding the occurrence of safety accidents.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and variations. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A grounding knife switch contact locking device, comprising a knife switch contact and a locking device arranged on the knife switch contact, wherein the knife switch contact is provided with a convex plate, characterized in that: The locking device includes a locking support frame and a locking assembly. The locking support frame includes a partition, a connecting plate and a support block. The connecting plate is arranged between the partition and the support block. A groove is provided on the support block. When the locking support frame is connected to the knife switch contact, the connecting plate is inserted into the knife switch contact, one end of the partition is facing the static contact point, and the convex plate extends into the groove. The locking assembly is arranged at the support block position, and the locking assembly passes through the support block and the convex plate.

2. A grounding switch contact locking device according to claim 1, characterized in that: The support block is provided with a connection hole I, which is provided at the groove position and passes through the support block. The convex plate is provided with a connection hole II, and the connection hole I is aligned with the connection hole II.

3. A grounding switch contact locking device according to claim 2, characterized in that: The locking assembly includes a support column and a telescopic member. The support column is arranged at the position of the connecting hole I, and the telescopic member is rotatably arranged inside the support column.

4. A grounding switch contact locking device according to claim 3, characterized in that: The telescopic member includes a cylinder and a telescopic column. The telescopic column is arranged in the cylinder. A limiting rod is provided on the telescopic column. A spiral sliding groove is provided on the cylinder. The limiting rod is arranged in the sliding groove. When the cylinder rotates, the limiting rod slides along the sliding groove.

5. The grounding switch contact locking device according to claim 4, characterized in that: One end of the support column is provided with an opening, and one end of the cylinder is provided with a locking block. A limiting hole I is provided in the opening, and a limiting hole II is provided in the locking block. The limiting hole I and the limiting hole II are aligned.

6. A grounding switch contact locking device according to claim 5, characterized in that: A locking rod and a spring are provided in the limiting hole II. The spring supports the locking rod, and the locking rod extends into the limiting hole I.

7. A grounding switch contact locking device according to claim 6, characterized in that: The locking block is equipped with a key, and the key is provided with a magnetic structure. When one end of the key is fully inserted into the locking block, the magnetic structure is aligned with the limiting hole II, driving the locking rod to leave the limiting hole I.

Images