Special device for relay characteristic test

Abstract

The utility model discloses a special device for a relay characteristic test, which comprises a storage box, a rolling assembly rotationally arranged in the storage box, a main line of which the middle part is wound on the rolling assembly, and lock heads connected to two ends of the main line, adapters are inserted into the lock heads, and the movable ends of the adapters are provided with adaptive ports capable of being buckled on relay screws. And the relay screw is locked on the relay. The effects of improving the detection efficiency, accuracy and portability of the relay are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of relay testing, in particular to a special device for relay characteristic testing. Background Art

[0002] Relays play a vital role in secondary circuits. During relay protection maintenance work, it is usually necessary to calibrate important relays in accordance with GB / T 7261-2000 Basic Test Methods for Relays and Devices to ensure that the relays can operate reliably. The measurement items include: ① measuring the DC resistance of the coil; ② measuring the action value and return value of the set point; ③ measuring the relay action time for the time relay.

[0003] At present, the method we adopt is: first, take photos of all the power lines and auxiliary node wiring heads on the relay; then, remove the relay power line and auxiliary contact wiring; then, connect one end of the relay protection test line to the relay power connector and auxiliary contact connector through the pin, and connect the other end to the DC power output interface and input interface of the relay protection tester to test the relay characteristics; after the test is completed, it is necessary to restore the original secondary circuit of the relay. However, relays are often connected to many auxiliary contacts, and many relays are in a small space, so it is difficult to remove the wires, and when restoring, it is necessary to check the photos and heads one by one, which is troublesome, time-consuming, and inefficient. It may also cause miswiring due to unclear photos, which will affect the entire control circuit. Summary of the invention

[0004] The technical problem to be solved by the utility model is that the test requires the disassembly of the circuit, which leads to low efficiency and easy occurrence of misoperation.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a special device for relay characteristic testing, including a storage box, a winding assembly rotatably arranged in the storage box, a main line with the middle wound around the winding assembly and a locking head connected to both ends of the main line, an adapter is inserted into the locking head, and the movable end of the adapter is provided with an adapter port that can be buckled onto a relay screw, and the relay screw is locked on the relay.

[0006] Preferably, the cross-section of the screw head of the relay screw is rectangular, steel balls are arranged on the side walls of the screw head for radial sliding along the center of the screw head, and a limiting structure is provided at the sliding channel opening of the steel balls, a spring is provided in the sliding channel, and a slot hole matching the steel column is provided on the inner side wall of the adapter port of the adapter.

[0007] Preferably, both ends of the main line are connected to a split block, a plurality of test lines are arranged in parallel on the split block, the test lines are connected in series to the main line, and the locking head is connected to the movable end of the test line.

[0008] Preferably, a joint cap that can be covered on the movable end of the lock is connected to the movable end of the test line, and the joint cap is connected to the test line through a flexible line.

[0009] Preferably, the storage box is disc-shaped, the winding assembly is fixed to a fixed column in the middle of the storage box, a winding skeleton is rotatably mounted on both ends of the fixed column, and a spiral spring sheet connects the winding skeleton and the fixed column, the middle of the main line passes through the center of the fixed column and is provided with a rotatable connecting head, the two ends of the main line are respectively wound on two winding skeletons, and the inner end and outer end of the spiral spring sheet are respectively connected to the fixed column and the winding skeleton.

[0010] Preferably, a card is provided at the main line outlet end of the storage box, and the card is arranged to slide vertically along the axial direction of the main line. An adapting groove is provided at the edge of the card. A limiting column is provided in the storage box, and an adapting protrusion is provided on one side of the limiting column. The limiting column is arranged to rotate, and when the adapting protrusion cooperates with the adapting groove, the bottom end of the card is located inside the outlet end of the main line.

[0011] 1. The utility model provides a special device for relay characteristic test. By setting a storage box, installing a winding assembly in the storage box, and winding the main line around the winding assembly, the utility model has good storage performance and is easy to carry.

[0012] 2. The two ends of the winding component are used to release the main line. By installing the relay screws on the relay and connecting the lock on the main line through the adapter, the main line can be connected, which can meet the inspection requirements of important relays in the power plant. The connection through the adapter can have a larger contact area and good conductivity.

[0013] 3. The adapter can be replaced and adjusted according to different relay screws, switched to a matching model, and connected directly by plugging in, avoiding the steps of removing wires and restoring wiring, thus improving the efficiency of inspection work. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 1 It 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 an embodiment of the utility model.

[0017] Figure 3 It is a schematic structural diagram of the winding assembly in an embodiment of the utility model.

[0018] Figure 4 It is a structural schematic diagram of a card block in an embodiment of the utility model.

[0019] In the picture: 1. Storage box; 2. Winding assembly; 3. Main line; 4. Dividing block; 5. Test line; 6. Lock; 7. Adapter; 8. Relay screw; 9. Connector cap. DETAILED DESCRIPTION

[0020] like Figure 1-4 As shown, the utility model provides a special device for relay characteristic test, including a storage box 1, a winding assembly 2 rotatably arranged in the storage box 1, a main line 3 with the middle wound on the winding assembly 2 and a locking head 6 connected to both ends of the main line 3, an adapter 7 is inserted on the locking head 6, and the movable end of the adapter 7 is provided with an adapter port that can be buckled on a relay screw 8, and the relay screw 8 is locked on the relay.

[0021] The screws on the existing relay are replaced with the relay screws 8 to ensure effective fixation. After the adapter 7 is installed, the main line 3 and the relay can be connected, avoiding the steps of removing the wires and restoring the wiring.

[0022] The relay screws 8 include three different specifications of nuts, 10mm, 12mm and 16mm, according to the needs, and are equipped with three types of adapters 7 accordingly. By replacing the adapters 7 on the main line 3, the connection of different relay screws 8 can be adapted.

[0023] The winding assembly 2 is similar to the internal structure of an existing measuring tape, with a spiral spring sheet as a mainspring. When the main line 3 is pulled outward, the spiral spring sheet rotates to store force. After the main line 3 is released, the winding assembly 2 retracts the main line 3 into the storage box 1.

[0024] like Figure 1 and Figure 2 The cross section of the screw head of the relay screw 8 is rectangular, and steel balls are arranged on the side walls of the screw head to slide radially along the center of the screw head, and a limited position structure is provided at the sliding channel of the steel balls, a spring is provided in the sliding channel, and a slot hole matching with the steel column is provided on the inner wall of the adapter port of the adapter 7.

[0025] A snap-on design is adopted between the adapter 7 and the relay screw 8. By snapping the adapter 7 onto the relay screw 8, the steel ball on the screw head of the relay screw 8 is squeezed, and when passing through the slot hole in the adapter 7, a part of the steel column pops out and enters the slot hole, thereby realizing the coordinated installation between the adapter 7 and the relay screw 8, and then realizing a large-area contact between the adapter 7 and the relay screw 8.

[0026] like Figure 1 and Figure 2As shown, in order to improve the efficiency of the inspection, both ends of the main line 3 are connected to a split block 4, a plurality of test lines 5 are arranged in parallel on the split block 4, the test lines 5 are connected in series to the main line 3, and the lock 6 is connected to the movable end of the test line 5.

[0027] Four test lines 5 are connected to each main line 3 via a dividing block 4, so that multiple relay screws 8 can be connected at one time.

[0028] like Figure 1 and Figure 2 As shown, in order to improve the safety of the lock 6, the movable end of the test line 5 is connected with a joint cap 9 which can be covered on the movable end of the lock 6, and the joint cap 9 is connected to the test line 5 through a flexible line.

[0029] like Figure 2 and Figure 3 The storage box 1 is in the shape of a disk, the winding assembly 2 is fixed to the fixed column in the middle of the storage box 1, the winding skeleton is rotatably mounted on both ends of the fixed column, and the spiral spring piece connects the winding skeleton and the fixed column, the middle of the main line 3 passes through the center of the fixed column and is provided with a rotating connector, the two ends of the main line 3 are respectively wound on two winding skeletons, and the inner end and the outer end of the spiral spring piece are respectively connected to the fixed column and the winding skeleton.

[0030] The fixed column is fixed to the axis of the storage box 1, and spiral spring sheets are respectively installed at both ends of the fixed column. The spiral spring sheets are used as springs. When the main line 3 wound on the winding skeleton is pulled out, the winding skeleton is driven to rotate. The winding skeleton pushes the spiral spring sheets to deform, and then the spiral spring sheets are reset to retract the main line 3 into the storage box 1.

[0031] The middle part of the main line 3 is located in the fixed column, and a plug-in structure is set in the middle part of the main line 3. The plug-in structure can rotate, that is, when one end of the main line 3 is reeled in and out, the winding skeleton drives the main line 3 to rotate without interfering with the other end of the main line 3.

[0032] like Figure 1 and Figure 4 As shown. A card is provided at the outlet end of the main line 3 of the storage box 1. The card is arranged to slide vertically along the axis of the main line 3. An adapting groove is provided at the edge of the card. A limiting column is provided inside the storage box 1. An adapting protrusion is provided on one side of the limiting column. The limiting column is arranged to rotate. When the adapting protrusion cooperates with the adapting groove, the bottom end of the card is located inside the outlet end of the main line 3. By pressing the card downward and rotating the adapting protrusion of the limiting column to the side away from the card, after the adapting groove of the card moves down to the side of the adapting protrusion, the limiting column is rotated so that the adapting protrusion enters the adapting groove to clamp the main line 3 and prevent the main line 3 from automatically retracting; subsequently, the limiting column is rotated so that the adapting protrusion moves out of the adapting groove, the card loses the limit, and the main line 3 can be stored and continued to be pulled out.

Claims

1. A special device for relay characteristic test, characterized in that: The invention comprises a storage box (1), a winding assembly (2) rotatably arranged in the storage box (1), a main line (3) whose middle part is wound around the winding assembly (2), and a locking head (6) connected to both ends of the main line (3); an adapter (7) is inserted into the locking head (6); a movable end of the adapter (7) is provided with an adapter port that can be buckled onto a relay screw (8); and the relay screw (8) is locked onto the relay.

2. A relay characteristic test device as claimed in claim 1, characterized in that: The cross-section of the screw head of the relay screw (8) is rectangular, and steel balls are arranged on the side walls of the screw head to slide radially along the center of the screw head. A limiting structure is provided at the sliding channel of the steel balls, and a spring is provided in the sliding channel. A slot hole matching the steel column is provided on the inner side wall of the adapter port of the adapter (7).

3. A relay characteristic test device as claimed in claim 1, characterized in that: Both ends of the main line (3) are connected to a split block (4), a plurality of test lines (5) are arranged in parallel on the split block (4), the test lines (5) are connected in series to the main line (3), and the lock head (6) is connected to the movable end of the test line (5).

4. A relay characteristic test device as claimed in claim 3, characterized in that: The movable end of the test line (5) is connected to a joint cap (9) that can be covered on the movable end of the lock head (6), and the joint cap (9) is connected to the test line (5) via a flexible line.

5. A relay characteristic test device as claimed in claim 1, characterized in that: The storage box (1) is in the shape of a disk, the winding assembly (2) is fixed to a fixed column in the middle of the storage box (1), a winding frame rotatably mounted on both ends of the fixed column, and a spiral spring sheet connecting the winding frame and the fixed column, the middle of the main line (3) passes through the center of the fixed column and is provided with a rotatable connector, the two ends of the main line (3) are respectively wound on two winding frames, and the inner end and the outer end of the spiral spring sheet are respectively connected to the fixed column and the winding frame.

6. A relay characteristic test device as claimed in claim 5, characterized in that: The main line (3) of the storage box (1) is provided with a card at the outlet end thereof. The card is arranged to slide vertically along the axis of the main line (3). An adapting groove is provided at the edge of the card. A limiting column is provided inside the storage box (1). An adapting protrusion is provided on one side of the limiting column. The limiting column is arranged to rotate. When the adapting protrusion cooperates with the adapting groove, the bottom end of the card is located inside the outlet end of the main line (3).

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