Snap-on gravity crimping connector and test device for thyristor quick test

Abstract

The present invention relates to a snap-on gravity crimping connector for thyristor rapid testing, comprising a travel switch, an operating handle, an insulating housing, a positioning snap and two metal crimping guide rods, the travel switch and the metal crimping guide rod are both arranged in the insulating housing, and the bottom of the insulating housing is provided with two through holes for the first ends of the two metal crimping guide rods to pass through, the positioning snap is connected to the bottom of the insulating housing and is located between the two metal crimping guide rods, one end of the operating handle is connected to the insulating housing, the travel switch is fixed to the inner wall of the insulating housing, the second ends of the two metal crimping guide rods are arranged to slide along the axial direction of the guide rod relative to the travel switch, and information is collected through the metal crimping guide rod after the two metal crimping guide rods are both slid into place along the axial direction of the guide rod, and the positioning snap is engaged between the two end aluminum plates of the tested thyristor. Compared with the prior art, the present invention has the advantages of high test efficiency.

Description

Technical Field

[0001] The invention relates to a connector for quick testing of a thyristor, in particular to a snap-on gravity crimping connector for quick testing of a thyristor. Background Art

[0002] In the field of high-voltage direct current transmission, the converter valve is the core device of the direct current transmission project. The performance of the converter valve is directly related to the reliability of the operation of the entire high-voltage direct current transmission system, which in turn affects the safe and stable operation of the power grid. The converter valve is composed of a certain number of thyristor stages connected in series. During the annual maintenance of the high-voltage direct current transmission project, it is necessary to test the triggering performance of a large number of thyristor stages in the converter valve to determine whether the thyristor components need to be replaced. In the routine maintenance of thyristors, reliability and efficiency must be taken into account. However, during the routine maintenance of conventional thyristors, the wiring through wiring clamps and other methods has the disadvantages of cumbersome operation and low efficiency, which cannot meet the requirements. Therefore, it is urgent to propose a reliable and convenient detection method for the maintenance of the thyristor of the converter valve, so as to solve the problems of poor efficiency in routine maintenance, which is particularly important in the case of tight maintenance period and emergency defect handling.

[0003] Although some existing technologies provide some connectors, for example, Chinese patent CN106706999A provides a thyristor contactor current detection device, and Russian patent RU219800U1 discloses a bracket for thyristor and bidirectional thyristor operation test, the connectors provided by these existing technologies all require active connection and assembly, and the efficiency improvement is limited. Summary of the invention

[0004] The purpose of the present invention is to provide a snap-on gravity crimping connector for rapid testing of thyristors.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A snap-on gravity crimping connector for quick testing of a thyristor comprises a travel switch, an operating handle, an insulating shell, a positioning snap and two metal crimping guide rods, wherein the travel switch and the metal crimping guide rods are both arranged in the insulating shell, and the bottom of the insulating shell is provided with two through holes for the first ends of the two metal crimping guide rods to pass through respectively, the positioning snap is connected to the bottom of the insulating shell and is located between the two metal crimping guide rods, one end of the operating handle is connected to the insulating shell, the travel switch is fixed on the inner wall of the insulating shell, the travel switch is provided with two contacts and two sliding holes, the second ends of the two metal crimping guide rods respectively pass through the two sliding holes, and are slidably arranged along the axial direction of the guide rod relative to the travel switch, one end of the two contacts is respectively connected to the two metal crimping guide rods, and the other end is connected to a host computer, and the metal crimping guide rods and the host computer are turned on after the two metal crimping guide rods are both slid into place along the axial direction of the guide rods, and the positioning snap is engaged between the aluminum plates at both ends of the tested thyristor.

[0007] A spring is sleeved on the metal crimping guide rod.

[0008] The first end of the metal crimping guide rod is provided with a supporting step at one end for supporting the spring.

[0009] The positioning buckle includes a first section and a second section, wherein the width of the first section is smaller than the distance between the aluminum plates at both ends of the tested thyristor, and the width of the second section is larger than the distance between the aluminum plates at both ends of the tested thyristor.

[0010] The positioning buckle is connected to the bottom of the insulating shell through screws.

[0011] The insulating shell is provided with an inspection and observation window.

[0012] There are two inspection and observation windows in total, and the two inspection and observation windows are arranged on two opposite sides.

[0013] The diameter of the operating handle gradually decreases from an end close to the insulating shell to an end far away from the insulating shell.

[0014] A connecting portion is provided on the top of the insulating shell.

[0015] A batch testing device comprises a batch fixture and a plurality of connectors as described above, wherein the batch fixture is connected to the connecting parts of all the connectors.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Through the matching design of the structure with the thyristor of the converter valve, the reliable and fast connection with the thyristor heat sink can be achieved by using its own gravity, which can greatly improve the detection efficiency.

[0018] 2. According to the shape and structure of the thyristor of the converter valve, the device can be effectively connected with both ends of the thyristor by clamping with its own gravity.

[0019] 3. Provide a batch testing device, and connect multiple connectors in parallel to achieve the effect of testing multiple thyristors at the same time, thereby greatly improving the testing efficiency of the thyristors of the converter valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the connector of the present invention;

[0021] Figure 2 is a bottom view schematic diagram of the connector of the present invention;

[0022] Figure 3 is a schematic diagram of the main parts of the connector of the present invention;

[0023] Figure 4 Schematic diagram of the travel switch;

[0024] Figure 5 is a schematic diagram of an insulating housing;

[0025] Among them: 1. travel switch, 2. metal crimping guide rod, 3. operating handle, 4. insulating shell, 5. positioning buckle, 6. screw, 7. aluminum plate, 1-1. sliding hole, 4-1. maintenance observation window, 4-2. through hole. DETAILED DESCRIPTION

[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] Example 1

[0028] A snap-on gravity crimping connector for quick testing of thyristors, such as Figure 1 and Figure 3 As shown, it includes a travel switch 1, an operating handle 3, an insulating housing 4, a positioning buckle 5 and two metal crimping guide rods 2. The travel switch 1 and the metal crimping guide rods 2 are both arranged in the insulating housing 4, and as shown in FIG. Figure 2 As shown, the bottom of the insulating housing 4 is provided with two through holes 4-2 for the first ends of the two metal crimping guide rods 2 to pass through respectively, the positioning buckle 5 is connected to the bottom of the insulating housing 4 and is located between the two metal crimping guide rods 2, one end of the operating handle 3 is connected to the insulating housing 4, and the travel switch 1 is fixed to the inner wall of the insulating housing 4, as shown in FIG. Figure 4As shown, the travel switch 1 is provided with two contacts and two sliding holes 1-1, the second ends of the two metal crimping guide rods 2 respectively pass through the two sliding holes 1-1, and are slidably arranged along the axial direction of the guide rod relative to the travel switch 1, one end of the two contacts is respectively connected to the two metal crimping guide rods 2, and the other end is connected to the host computer, and after the two metal crimping guide rods 2 are slid into place along the axial direction of the guide rods, the metal crimping guide rods 2 and the host computer are connected, and the positioning buckle 5 is engaged between the aluminum plates 7 at both ends of the tested thyristor.

[0029] By matching the structure with the thyristor of the converter valve, the reliable and fast connection with the thyristor heat sink can be achieved by using its own gravity, which can greatly improve the detection efficiency.

[0030] Specifically, the operating handle 3 is made of insulating material. On the one hand, it can be held by hand for easy operation by the tester, and a certain distance can be maintained from the live device. On the other hand, applying forces in different directions to the operating handle 3 can complete the connection or disconnection operation, improve work efficiency, and be more convenient. More importantly, when performing the connection operation, the operating handle 3 itself also provides weight, so that the connector itself is slightly tilted, so that the metal crimping guide rod 2 is reliably connected to the heat sinks at both ends of the thyristor. After the first end of the metal crimping guide rod 2 contacts the aluminum plate 7, relying on gravity, the metal crimping guide rod 2 can be pressed downward, so that the connection between the metal crimping guide rod 2 and the aluminum plate 7 is more secure. In this downward squeezing process, since the travel switch 1 is fixed on the inner wall of the insulating housing 4, the metal crimping guide rod 2 will slide relative to the travel switch 1. When the travel of the two metal crimping guide rods 2 relative to the travel switch 1 along the axial direction of their own rod body reaches a certain degree, the signal will be turned on, avoiding the situation where only one side is connected or not connected, and preventing the occurrence of suspended ignition.

[0031] Generally, under normal circumstances, a spring is sleeved on the metal crimping guide rod 2. In some embodiments, the first end of the metal crimping guide rod 2 is provided with a supporting step at one end for supporting the spring, and both ends of the spring are supported by the supporting step and the housing of the travel switch. Of course, in other embodiments, other supporting methods can also be used.

[0032] In this embodiment, the positioning clip 5 includes a first section and a second section, wherein the width of the first section is smaller than the spacing between the aluminum plates 7 at both ends of the tested thyristor, and the width of the second section is larger than the spacing between the aluminum plates 7 at both ends of the tested thyristor. In this way, the first section can be embedded between the aluminum plates 7 to prevent the metal crimping guide rod 2 from deflecting. The snap-on connection is achieved by deforming the locking functional part during the assembly process and then returning to its original position to form a lock and provide a holding force. The size of the clip is set according to the distance between the two aluminum plates 7 of the heat sink at both ends of the thyristor. After the clip is fixed, the metal crimping guide rod 2 can be effectively mechanically connected to the two aluminum plates 7 at both ends of the thyristor through its own gravity crimping, thereby achieving the purpose of testing the thyristor.

[0033] Generally, the positioning buckle 5 is connected to the bottom of the insulating housing 4 by screws 6. The screws 6 can realize mechanical connection and fixation between each other.

[0034] The insulating shell 4 can protect the internal metal crimping guide rod 2, travel switch 1, etc., avoiding the exposure of internal components, preventing operators from electric shock and unstable connection failures. In addition, the shell is also convenient for using multiple connectors in parallel.

[0035] like Figure 5 As shown, the insulating shell 4 is provided with a maintenance observation window 4-1, and there are two maintenance observation windows 4-1 in total, and the two maintenance observation windows 4-1 are arranged on two opposite sides. The setting of the maintenance observation window 4-1 can facilitate the observation of the internal situation. Under normal circumstances, the maintenance observation window 4-1 is closed and can be disassembled when maintenance is needed.

[0036] In some embodiments, the diameter of the operating handle 3 gradually decreases from the end close to the insulating housing 4 to the end far away from the insulating housing 4, so that the torque generated by gravity is greater.

[0037] Example 2

[0038] This embodiment is substantially the same as Embodiment 1. In order to avoid blurring the purpose of this application, the similarities are not described again and only the differences are described.

[0039] The significant difference between this embodiment and Embodiment 1 is that, in this embodiment, a connecting portion is provided on the top of the insulating shell 4. Therefore, based on this feature, a batch testing device can be provided, including a batch fixture and a plurality of connectors as described above, and the batch fixture is connected to the connecting portions of all connectors.

[0040] Example 3

[0041] This embodiment is substantially the same as Embodiment 1. In order to avoid blurring the purpose of this application, the similarities are not described again and only the differences are described.

[0042] The significant difference between this embodiment and embodiment 1 is that, in this embodiment, Figure 4 As shown, the travel switch 1 includes four parts, namely a switch body, a linkage plate and two connection blocks for connecting the metal crimping guide rods 2. Two sliding holes 1-1 are respectively arranged on the two connection blocks, and a groove is provided on the side of the two connection blocks. The two ends of the linkage plate are respectively inserted into the two grooves. A support rod is provided at the bottom of the switch body. The part of the support rod that contacts the upper surface of the linkage plate is circular, and the circular arc surface contacts the linkage plate. Such a design can make the movement difference of the two metal crimping guide rods 2 of the connector have a certain elasticity, avoid damage, and increase the service life.

[0043] It should be noted that, in the present embodiment, the spring provided on the metal crimping guide rod 2 is an indispensable device. If the spring is missing, there will be a lack of boundary constraints and an effective mechanical connection between the metal crimping guide rod 2 and the aluminum plate 7 cannot be formed.

Claims

1. A snap-on gravity crimping connector for quick testing of thyristors, characterized in that: The invention comprises a travel switch (1), an operating handle (3), an insulating housing (4), a positioning buckle (5) and two metal crimping guide rods (2), wherein the travel switch (1) and the metal crimping guide rods (2) are both arranged in the insulating housing (4), and the bottom of the insulating housing (4) is provided with two through holes for respectively passing the first ends of the two metal crimping guide rods (2), the positioning buckle (5) is connected to the bottom of the insulating housing (4) and is located between the two metal crimping guide rods (2), one end of the operating handle (3) is connected to the insulating housing (4), the travel switch (1) is fixed to the inner wall of the insulating housing (4), and the positioning buckle (5) is connected to the bottom of the insulating housing (4) and is located between the two metal crimping guide rods (2). The travel switch (1) is provided with two contacts and two sliding holes (1-1); the second ends of the two metal crimping guide rods (2) respectively pass through the two sliding holes (1-1) and are arranged to slide along the axial direction of the guide rod relative to the travel switch (1); one end of the two contacts is respectively connected to the two metal crimping guide rods (2), and the other end is connected to the host computer; after the two metal crimping guide rods (2) are slid into place along the axial direction of the guide rods, the metal crimping guide rods (2) and the host computer are connected; the positioning buckle (5) is clamped between the two end aluminum plates (7) of the tested thyristor; the two end aluminum plates (7) of the thyristor are two aluminum plates (7) of the heat sink at the two ends of the thyristor; The metal crimping guide rod (2) is sleeved with a spring; The positioning buckle (5) comprises a first section and a second section, wherein the width of the first section is smaller than the spacing between the aluminum plates (7) at both ends of the tested thyristor, and the width of the second section is larger than the spacing between the aluminum plates (7) at both ends of the tested thyristor, and the first section is embedded between the aluminum plates (7) to prevent the metal crimping guide rod (2) from deflecting, and the buckle size is set according to the distance between the two aluminum plates (7) of the heat sink at both ends of the thyristor.

2. The snap-on gravity crimping connector for quick testing of thyristors according to claim 1, characterized in that: The first end of the metal crimping guide rod (2) is provided with a supporting step at one end for supporting the spring.

3. The snap-on gravity crimping connector for quick testing of thyristors according to claim 1, characterized in that: The positioning buckle (5) is connected to the bottom of the insulating housing (4) via a screw (6).

4. The snap-on gravity crimping connector for quick testing of thyristors according to claim 1, characterized in that: The insulating housing (4) is provided with a maintenance observation window (4-1).

5. The snap-on gravity crimping connector for quick testing of thyristors according to claim 4, characterized in that: There are two inspection and observation windows (4-1) in total, and the two inspection and observation windows (4-1) are arranged on two opposite sides.

6. The snap-on gravity crimping connector for quick testing of thyristors according to claim 1, characterized in that: The diameter of the operating handle (3) gradually decreases from an end close to the insulating housing (4) to an end away from the insulating housing (4).

7. A snap-on gravity crimping connector for quick testing of thyristors according to any one of claims 1 to 6, characterized in that: A connecting portion is provided on the top of the insulating shell (4).

8. A batch testing device, characterized in that: The invention comprises a batch fixture and a plurality of connectors according to claim 7, wherein the batch fixture is connected to the connecting parts of all the connectors.

Images