Multifunctional relay protection short circuit device

Abstract

The utility model discloses a multifunctional relay protection short-circuit device, which comprises a change-over switch, a test wire connected to one end of the change-over switch and a test wire connector connected in parallel to the other end of the change-over switch, a storage box for storing the test wire is arranged on the test wire, and a connecting disc is rotatably arranged in the change-over switch. Normally-open contacts are arranged in pairs around the axis of the connecting disc at equal angles, the edge of the connecting disc is connected with connecting pieces which are communicated with the normally-open contacts arranged in pairs, and the test wire connectors are communicated with the normally-open contacts. The effect of improving the short-circuit efficiency and safety of the relay terminal is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of short-circuiting devices, in particular to a multifunctional relay protection short-circuiting device. Background Art

[0002] Relay protection plays the role of power equipment protection and accident handling in hydropower plants, provides technical support for fault finding, ensures the safe and reliable operation of equipment and lines in power plants, and is the first line of defense for power plant safety. Once relay protection is miswired or accidentally touched, it will have an immeasurable impact on the power plant. Therefore, the functions of relay protection devices need to be maintained regularly. Each maintenance needs to verify whether the protection device can receive the input quantity, whether it can output the signal to the monitoring background, and whether the protection trip node can correctly trip the switch. At present, the method we adopt for the verification of input and output is: through the relay protection test line and the test line pin, and then short-circuit the terminal block to complete it. However, in the protection panel, the terminal blocks are often very close, and you need to look at the terminal block to see the terminal number clearly, which is very easy to cause accidental touch, and then lead to DC grounding or other switches tripping, which has a certain impact on the operation of the power plant. Summary of the invention

[0003] The technical problem to be solved by the utility model is that the distance between the terminal blocks is short, and accidental contact is easy to occur during short circuit.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a multifunctional relay protection short-circuiting device, including a switching switch, a test line connected to one end of the switching switch and a test line connector connected in parallel to the other end of the switching switch, a storage box for storing the test line is arranged on the test line, a connecting disk is rotatably arranged inside the switching switch, normally open contacts are arranged in pairs at equal angles around the axis of the connecting disk, a connecting piece connected to the normally open contacts arranged in pairs is connected to the edge of the connecting disk, and the test line connector is connected to the normally open contact.

[0005] Preferably, the number of the normally open contacts arranged in pairs is twice the number of the test line connector, and the normally open contacts on both sides of the normally open contacts connected to the test line connector are not connected to the test line connector.

[0006] Preferably, a transfer handle is rotatably connected to the outer wall of the transfer switch, the transfer handle is coaxially fixedly connected to the connection plate, and the width of the connection plate is smaller than the gap between two adjacent pairs of normally open contacts.

[0007] Preferably, the test line connector includes a shell, a pin and a pressing block coaxially slidably arranged at both ends of the shell, a connecting wire connecting a pair of the test line connector and the pin, and a spring sleeved on the pressing block, the two ends of the spring are respectively connected to the inner end wall of the shell and one end of the pressing block located in the shell, the pressing block fixes the connecting pin, and one end of the pressing block located in the shell is connected to an elastic card block bent outward, the shell is provided with a card slot that cooperates with the movable end of the card block to limit the rebound of the spring after the pressing block pushes the pin out of the shell, and the shell is also provided with a sliding groove for the connecting wire to pass through.

[0008] Preferably, continuous grooves are provided on the inner end wall of the card slot and the outer side wall of the movable end of the card block.

[0009] Preferably, a fixing column is provided in the middle of the storage box, and spiral spring sheets are mounted on both ends of the fixing column. The outer wall of the spiral spring sheet is fixedly connected to a winding skeleton. The middle of the test line is located inside the fixing column, and the two ends of the test line are respectively wound around two winding skeletons. The inner end of the spiral spring sheet is fixedly connected to the fixing column, and the outer end is fixedly connected to the inner wall of the winding skeleton. A clamping structure is provided on the two wire passing holes of the storage box for the test line to pass through.

[0010] Preferably, the clamping structure includes a clamping block which is radially slidably arranged at the end of the storage box along the wire passing hole, an arc-shaped notch is arranged at one end of the clamping block close to the wire passing hole, a limiting rod is vertically rotated arranged on one side of the clamping block, and the outer wall of the limiting rod is provided with a wedge-shaped block which cooperates with the notch at the bottom end of the side wall of the clamping block, the top surface of the wedge-shaped block is an inclined surface, and when the wedge-shaped block of the limiting rod cooperates with the notch of the clamping block, the bottom end of the clamping block is located in the wire passing hole.

[0011] 1. The utility model provides a multifunctional relay protection short-circuiting device. The connecting piece is adjusted to connect the normally open contact of the unconnected test line connector. After the terminal block is short-circuited through the test line connector, the connecting plate is rotated to connect the connecting piece to a pair of normally open contacts of the connected test line connector. Then, a short-circuiting test of a group of terminals is performed, eliminating the risk of accidental contact during short-circuiting and improving the safety of the terminal block short-circuiting test.

[0012] 2. There are multiple test line connectors in parallel on the transfer switch. By rotating the connection disk to switch different normally open contacts, short-circuit tests on different terminals can be performed, which improves the efficiency of the short-circuit test.

[0013] 3. The length of the test line can be stored, making the short-circuit device more portable; the pins of the test line connector are retractable and adjustable, making it easy to remove the test line connector from the terminal block. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1It is a structural schematic diagram of an embodiment of the utility model.

[0016] Figure 2 It is a schematic diagram of the internal structure of the conversion switch in the embodiment of the utility model.

[0017] Figure 3 Schematic diagram of the internal structure of the test line connector in the embodiment of the utility model.

[0018] Figure 4 Schematic diagram of the internal structure of the storage box in the embodiment of the utility model.

[0019] Figure 5 It is a structural schematic diagram of the storage box interface in an embodiment of the utility model.

[0020] In the figure: 1. conversion switch; 11. conversion handle; 12. connection plate; 13. connection piece; 14. normally open contact; 2. test line; 3. storage box; 4. relay; 5. test line connector; 51. connecting line; 52. housing; 53. pin; 54. pressing block; 55. card block; 56. card slot; 57. slide slot; 58. spring. DETAILED DESCRIPTION

[0021] like Figure 1-5 As shown, the utility model provides a multifunctional relay protection short-circuiting device, including a conversion switch 1, a test line 2 connected to one end of the conversion switch 1 and a test line connector 5 connected in parallel to the other end of the conversion switch 1, a storage box 3 for storing the test line 2 is arranged on the test line 2, a connecting disk 12 is rotatably arranged in the conversion switch 1, normally open contacts 14 are arranged in pairs at equal angles around the axis of the connecting disk 12, a connecting piece 13 connected to the edge of the connecting disk 12 for connecting the normally open contacts 14 arranged in pairs is connected, and the test line connector 5 is connected to the normally open contact 14.

[0022] The storage box 3 is used for winding and storing the test line 2, which is portable and can prevent the test line 2 from being scattered randomly.

[0023] When conducting a short-circuit test, insert the movable end of the test line connector 5 into the test hole of the relay 4, and use the elastic clamping structure in the test hole to clamp the movable end of the test line connector 5, so that the test line connector 5 is in close contact with the terminal in the test hole, and the relay 4 terminals are short-circuited; one end of the test line 2 is connected to the conversion switch 1, and the other end is connected to the detection instrument; six test line connectors 5 are connected to different test holes in turn, and the connecting disk 12 is rotated. The connecting disk 12 drives the connecting piece 13 to rotate, and the connecting piece 13 contacts with different normally open contacts 14 arranged in pairs, so that different terminals are short-circuited through the test line connector 5 and connected to the detection instrument, and the short-circuit test of the relay 4 terminals is carried out in turn.

[0024] like Figure 2The number of the normally open contacts 14 arranged in pairs is twice that of the test line connector 5 , and the normally open contacts 14 on both sides of the normally open contacts 14 connected to the test line connector 5 are not connected to the test line connector 5 .

[0025] The connecting piece 13 connects a pair of normally open contacts 14 at a time to take a reading of a short-circuited contact. In the process of rotating the connecting disk 12, when it rotates to the normally open contact 14 that is not connected to the test line connector 5, the test line 2 is disconnected from the contact to facilitate observation of whether the detection instrument is normal.

[0026] like Figure 2 As shown, the outer wall of the switch 1 is rotatably connected with a switch handle 11, which is coaxially fixedly connected to the connection disk 12, and the width of the connection sheet 13 is smaller than the gap between two adjacent pairs of normally open contacts 14.

[0027] like Figure 1 and Figure 3 The test line connector 5 comprises a housing 52, a pin 53 and a pressing block 54 coaxially slidably arranged at both ends of the housing 52, a connecting line 51 connecting a pair of the test line connectors and the pin 53, and a spring 58 sleeved on the pressing block 54, the two ends of the spring 58 are respectively connected to the inner end wall of the housing 52 and one end of the pressing block 54 located in the housing 52, the pressing block 54 is fixedly connected to the pin 53, one end of the pressing block 54 located in the housing 52 is connected to an outwardly bent elastic block 55, the housing 52 is provided with a card slot 56 for cooperating with the movable end of the card block 55 to limit the rebound of the spring 58 after the pressing block 54 pushes the pin 53 out of the housing 52, and the housing 52 is also provided with a slide slot 57 for the connecting line 51 to pass through.

[0028] When short-circuiting the relay 4 terminals, some terminals can be short-circuited for a long time, while some terminals can only be short-circuited for a few seconds. There is a risk of burning out the equipment due to long-term short-circuiting. Therefore, after short-circuiting some of the relay 4 terminals, they need to be disconnected immediately after measurement. In order to reduce the labor intensity of the inspection personnel, the block 55 is pressed to move the movable end of the block 55 to the inner side of the shell 52, and the spring 58 rebounds to pull the pressing block 54 to move, and drives the pin 53 to move, so that the pin 53 moves toward the inside of the shell 52, thereby separating the pin 53 from the test hole.

[0029] When using the pin 53, by pressing the pressing block 54, since the fixed end of the block 55 adopts a spring design, the movable end of the block 55 moves out of the slot 56, and through the limitation at the end of the slot 56, the pin 53 cannot rebound under the pulling force of the spring 58.

[0030] As a preferred embodiment of the present invention, in order to increase the stability of the clamping of the clamping block 55, continuous grooves are provided on the inner end wall of the clamping slot 56 and the outer side wall of the movable end of the clamping block 55.

[0031] like Figure 4 and Figure 5 The storage box 3 is provided with a fixed column in the middle, and both ends of the fixed column are provided with a spiral spring sheet, and the outer wall of the spiral spring sheet is fixedly connected to the winding skeleton, the middle of the test line 2 is located inside the fixed column, and the two ends of the test line 2 are respectively wound on two winding skeletons, the inner end of the spiral spring sheet is fixedly connected to the fixed column, and the outer end is fixedly connected to the inner wall of the winding skeleton, and the two wire holes of the storage box 3 for the test line 2 to pass through are provided with a clamping structure.

[0032] The interior of the fixed column is a hollow structure, and the middle part of the test line 2 is located inside the fixed column. A rotating plug is provided in the middle part of the test line 2, so that the test line 2 will not be stirred when the winding skeleton at one end of the fixed column rotates; when the test line 2 is pulled out, the test line 2 drives the winding skeleton to rotate to a certain extent, and then the spiral spring sheet rotates to a certain extent, and then the test line 2 is clamped by the clamping structure to avoid automatic winding. When it is necessary to wind the line, the clamping structure is released, and the spiral spring sheet will drive the winding skeleton to reset and rotate, and the test line 2 is wound, thus realizing the winding.

[0033] like Figure 5 The clamping structure comprises a clamping block radially slidingly arranged at the end of the storage box 3 along the wire-passing hole, an arc-shaped notch is arranged at one end of the clamping block close to the wire-passing hole, a limit rod is arranged on one side of the clamping block for vertical rotation, a wedge-shaped block is arranged on the outer wall of the limit rod to match with the notch at the bottom end of the side wall of the clamping block, the top surface of the wedge-shaped block is an inclined surface, and when the wedge-shaped block of the limit rod matches with the notch of the clamping block, the bottom end of the clamping block is located in the wire-passing hole.

[0034] By rotating the limit rod, the wedge block on the limit rod rotates to the side away from the clamping block, and after the clamping block is pressed down to clamp the test line 2, the limit rod is rotated, and the wedge block enters the notch on one side of the clamping block and limits the clamping block, and the clamping block clamps the test line 2. In addition, the bottom end of the clamping block is set to be thick enough to avoid damage to the test line.

Claims

1. A multifunctional relay protection short-circuit device, characterized in that: The invention comprises a transfer switch (1), a test line (2) connected to one end of the transfer switch (1), and a test line connector (5) connected in parallel to the other end of the transfer switch (1); a storage box (3) for storing the test line (2) is arranged on the test line (2); a connection disk (12) is rotatably arranged in the transfer switch (1); normally open contacts (14) are arranged in pairs at equal angles around the axis of the connection disk (12); a connection piece (13) for connecting the normally open contacts (14) arranged in pairs is connected to the edge of the connection disk (12); and the test line connector (5) is connected to the normally open contacts (14).

2. A multifunctional relay protection short-circuit device as claimed in claim 1, characterized in that: The number of the normally open contacts (14) arranged in pairs is twice the number of the test line connector (5), and the normally open contacts (14) on both sides of the normally open contacts (14) connected to the test line connector (5) are not connected to the test line connector (5).

3. A multifunctional relay protection short-circuit device as claimed in claim 2, characterized in that: The outer wall of the conversion switch (1) is rotatably connected to a conversion handle (11), the conversion handle (11) is coaxially fixedly connected to the connection plate (12), and the width of the connection plate (13) is smaller than the gap between two adjacent pairs of normally open contacts (14).

4. A multifunctional relay protection short-circuit device as claimed in claim 1, characterized in that: The test line connector (5) comprises a shell (52), a plug pin (53) and a pressing block (54) coaxially slidably arranged at two ends of the shell (52), a connecting line (51) connecting a pair of the test line connector and the plug pin (53), and a spring (58) sleeved on the pressing block (54), the two ends of the spring (58) respectively connected to the inner end wall of the shell (52) and one end of the pressing block (54) located in the shell (52), the pressing block (54) fixedly connects the plug pin (53), one end of the pressing block (54) located in the shell (52) is connected to an outwardly bent elastic block (55), the shell (52) is provided with a card slot (56) for cooperating with the movable end of the card block (55) to limit the rebound of the spring (58) after the pressing block (54) pushes the plug pin (53) out of the shell (52), and the shell (52) is also provided with a slide slot (57) for the connecting line (51) to pass through.

5. A multifunctional relay protection short-circuit device as claimed in claim 4, characterized in that: Continuous grooves are provided on the inner end wall of the clamping slot (56) and the outer side wall of the movable end of the clamping block (55).

6. A multifunctional relay protection short-circuit device as claimed in claim 1, characterized in that: A fixing column is provided in the middle of the storage box (3), and spiral spring sheets are mounted on both ends of the fixing column. The outer wall of the spiral spring sheet is fixedly connected to a winding frame. The middle of the test line (2) is located inside the fixing column. The two ends of the test line (2) are respectively wound around two winding frames. The inner end of the spiral spring sheet is fixedly connected to the fixing column, and the outer end is fixedly connected to the inner wall of the winding frame. The two wire holes of the storage box (3) for the test line (2) to pass through are both provided with a clamping structure.

7. A multifunctional relay protection short-circuit device as claimed in claim 6, characterized in that: The clamping structure comprises a clamping block which is radially slidably arranged at the end of the storage box (3) along the wire passing hole, an arc-shaped notch is arranged at one end of the clamping block close to the wire passing hole, a limit rod is arranged on one side of the clamping block for vertical rotation, an outer wall of the limit rod is provided with a wedge-shaped block which cooperates with the notch at the bottom end of the side wall of the clamping block, the top surface of the wedge-shaped block is an inclined surface, and when the wedge-shaped block of the limit rod cooperates with the notch of the clamping block, the bottom end of the clamping block is located in the wire passing hole.

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