A high-frequency current sensor with high reliability

Abstract

The utility model relates to the technical field of high-frequency current sensors, and discloses a high-reliability high-frequency current sensor, including a first shell, the bottom of the first shell is hinged with a second shell, the top of the first shell is equipped with a wiring port, and the left side of the first shell and the second shell is equipped with a limit assembly, and the limit assembly includes a first connecting block, a second connecting block, a limit groove, a positioning block, a movable groove, a sealing cover, a positioning pin, a reset spring and a pull rod. The high-reliability high-frequency current sensor uses the positioning block to enter the limit groove to provide a fulcrum for the subsequent insertion of the positioning pin, so that the first connecting block and the second connecting block are firmly locked by inserting the positioning pin and the pin groove on the positioning block to prevent the first shell or the second shell from being accidentally pulled to separate the two, thereby ensuring the reliability of the limit connection, enhancing the stability of the connection, and further facilitating the operation and use of the user.

Description

Technical Field

[0001] The utility model relates to the technical field of high-frequency current sensors, in particular to a high-reliability high-frequency current sensor. Background Art

[0002] Partial discharge detection is an important test for inspecting the insulation status of high-voltage electrical equipment such as high-voltage switches GIS, transformers, generators, and power cables. In the prior art, in addition to using ultrasonic and ultra-high frequency methods to directly measure the partial discharge of high-voltage electrical equipment, the partial discharge condition inside the high-voltage electrical equipment can also be detected by detecting the high-frequency current signal of the grounding wire of the high-voltage electrical equipment.

[0003] For example, a high-frequency current sensor with high reliability is disclosed in China with patent publication number CN218272480U. In this utility model, fixation is achieved through a card slot in the positioning slot and a card column on the positioning block, and fixation can be performed without using components such as buckles. However, the connection method adopted in this utility model is a snap-on connection. The card column used for positioning will continuously rub against the inner wall of the positioning slot due to the opening and closing operations of the staff, thereby causing wear of the structure and reducing the connection stability. At the same time, it is difficult to maintain after wear, which may cause the entire device to be abandoned, increasing the cost of use and being inconvenient for users. Therefore, a high-frequency current sensor with high reliability is proposed to solve the above problems. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a high-reliability high-frequency current sensor, which has the advantages of easy maintenance, reduced friction and extended service life. It solves the problem mentioned in the background technology that the existing high-reliability high-frequency current sensor has frequent friction between components, resulting in easy wear of the structure, shortening the service life, and being inconvenient to maintain.

[0006] (II) Technical solution

[0007] To achieve the above object, the utility model provides the following technical solution: a high-reliability high-frequency current sensor, comprising a first shell, the bottom of the first shell is hinged with a second shell, the top of the first shell is equipped with a wiring port, and the left side of the first shell and the second shell is equipped with a limit assembly;

[0008] The limiting assembly includes a first connecting block, a second connecting block, a limiting groove, a positioning block, a movable groove, a sealing cover, a positioning pin, a return spring and a pull rod. The first connecting block is installed on the left side of the first shell, the second connecting block is installed on the left side of the second shell, the top of the second connecting block is provided with a limiting groove, the bottom of the first connecting block is installed with a positioning block, the left side of the second connecting block is provided with a movable groove, the left end of the movable groove is connected to the sealing cover, the inner right wall of the movable groove is connected to the positioning pin, the return spring is installed on the right side of the sealing cover, and the left side of the positioning pin is connected to the pull rod.

[0009] Furthermore, the bottom of the positioning block passes through the limiting groove and extends to the inside of the limiting groove, and is engaged with the limiting groove. A pin groove is provided on the left side of the positioning block.

[0010] Furthermore, the sealing cover is engaged with the opening on the left side of the movable groove, the right end of the return spring passes through the opening of the movable groove and extends to the inside of the movable groove, and the size of the positioning pin is matched with the inner diameter of the pin groove.

[0011] Furthermore, a sliding hole is provided between the inner right wall of the movable groove and the inner left wall of the limiting groove, and the positioning pin passes through the sliding hole and extends to the inside of the limiting groove and is slidably connected to the sliding hole.

[0012] Furthermore, a pressure plate is installed at the left end of the positioning pin, the right end of the pull rod is connected to the left side of the pressure plate, the right end of the return spring is in contact with the left side of the pressure plate, and the return spring is sleeved on the outside of the pull rod.

[0013] Furthermore, a round hole is provided on the right side of the sealing cover, the pull rod passes through the round hole and extends to the outside of the sealing cover, and a groove opening is provided on the top of the pull rod.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0016] 1. The high-reliability high-frequency current sensor uses the positioning block to enter the limit groove to provide a fulcrum for the subsequent insertion of the positioning pin, so that the first connecting block and the second connecting block are firmly locked by inserting the positioning pin and the pin groove on the positioning block to prevent the first shell or the second shell from being separated by accidentally pulling the two, thereby ensuring the reliability of the limit connection, enhancing the stability of the connection, and further facilitating the user's operation and use.

[0017] 2. The high-reliability high-frequency current sensor has a snap-fit ​​connection between the sealing cover and the movable groove, and the reset spring and the left pressure plate of the positioning pin are only in contact with each other, which facilitates maintenance. The user pulls the reset spring out of the movable groove for maintenance, as well as the maintenance or replacement of the positioning pin, thereby avoiding wear damage to the connecting components caused by friction, extending the service life of the connecting structure, thereby reducing the cost of the device in use, and further facilitating the use of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a partial front view cross-sectional view of the utility model;

[0020] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0021] In the figure: 1. first shell; 2. second shell; 3. wiring port; 4. limit assembly; 401. first connecting block; 402. second connecting block; 403. limit groove; 404. positioning block; 405. movable groove; 406. sealing cover; 407. positioning pin; 408. return spring; 409. pull rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3 A high-reliability high-frequency current sensor in this embodiment includes a first shell 1, a second shell 2 is hinged at the bottom of the first shell 1, a wiring port 3 is installed on the top of the first shell 1, and a limit assembly 4 is installed on the left side of the first shell 1 and the second shell 2.

[0024] exist Figure 1-3 In the figure, the limiting assembly 4 is composed of nine components including a first connecting block 401, a second connecting block 402, a limiting groove 403, a positioning block 404, a movable groove 405, a sealing cover 406, a positioning pin 407, a return spring 408 and a pull rod 409, which has the advantages of easy maintenance, reduced friction and extended service life.

[0025] exist Figure 2 and Figure 3In the figure, a first connecting block 401 is installed on the left side of the first shell 1, and a second connecting block 402 is installed on the left side of the second shell 2. A limiting groove 403 is provided on the top of the second connecting block 402, and a positioning block 404 is installed on the bottom of the first connecting block 401. The first shell 1 and the second shell 2 are preliminarily connected by insertion.

[0026] exist Figure 2 and Figure 3 In the embodiment, a movable groove 405 is provided on the left side of the second connecting block 402, and a sealing cover 406 is connected to the left end of the movable groove 405, so that the movable groove 405 can be switched between open and closed, which is convenient for users to replace internal wear items.

[0027] exist Figure 2 and Figure 3 In the figure, a positioning pin 407 is connected to the inner right wall of the movable groove 405, a return spring 408 is installed on the right side of the sealing cover 406, and a pull rod 409 is connected to the left side of the positioning pin 407. The positioning pin 407 is pushed by the return spring 408 to pass through the sliding hole and enter the pin groove on the left side of the positioning block 404 for reinforcement.

[0028] It should be noted that this section is intended to provide a background or context for the implementation methods stated in the claims, and detailed descriptions of known functions and known components are omitted. At the same time, fixed and movable installations are determined according to actual application methods. To ensure the compatibility of the equipment, the operating methods used are consistent with the parameters of marketed equipment. The description here is not admitted to be prior art because it is included in this section.

[0029] When implementing, follow these steps:

[0030] 1) First, press the sealing cover 406 with your finger and gently pull the pull rod 409 to the left, so that the pull rod 409 drives the pressure plate to move the positioning pin 407 to the left;

[0031] 2) Then, the pressure plate compresses the return spring 408 to shrink the return spring 408, thereby retracting the positioning pin 407 into the movable groove 405;

[0032] 3) Finally, the first housing 1 is moved upward in an arc line to expose the opposite side of the first housing 1 and the second housing 2, and the limit is released.

[0033] To sum up, the high-reliability high-frequency current sensor uses the positioning block 404 to enter the limit groove 403 to provide a fulcrum for the subsequent insertion of the positioning pin 407, so as to use the insertion of the positioning pin 407 and the pin groove on the positioning block 404 to firmly lock the first connecting block 401 and the second connecting block 402 to prevent the first shell 1 or the second shell 2 from being accidentally pulled apart, thereby ensuring the reliability of the limit connection, enhancing the stability of the connection, and further facilitating the user's operation and use.

[0034] Moreover, the sealing cover 406 is provided with a snap-fit ​​connection with the movable groove 405, and the reset spring 408 and the left pressure plate of the positioning pin 407 are only in contact with each other, which facilitates the maintenance process. The user pulls the reset spring 408 out of the movable groove 405 for maintenance, and maintains or replaces the positioning pin 407, thereby avoiding wear damage caused by friction of the connecting component, extending the service life of the connecting structure, and reducing the cost of the device in use. It is further convenient for users to use and solves the problem that the existing high-reliability high-frequency current sensor has frequent friction between components, which makes the structure easy to wear, shortens the service life, and is inconvenient to maintain.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-reliability high-frequency current sensor, comprising a first housing (1), characterized in that: The bottom of the first shell (1) is hingedly connected to the second shell (2), the top of the first shell (1) is provided with a wiring port (3), and the left sides of the first shell (1) and the second shell (2) are provided with a limit assembly (4); The limiting assembly (4) comprises a first connecting block (401), a second connecting block (402), a limiting groove (403), a positioning block (404), a movable groove (405), a sealing cover (406), a positioning pin (407), a return spring (408) and a pull rod (409); the first connecting block (401) is installed on the left side of the first shell (1), the second connecting block (402) is installed on the left side of the second shell (2), and the top of the second connecting block (402) is provided with a limiting groove. A positioning groove (403) is provided, a positioning block (404) is installed at the bottom of the first connecting block (401), a movable groove (405) is opened on the left side of the second connecting block (402), a sealing cover (406) is connected to the left end of the movable groove (405), a positioning pin (407) is connected to the inner right wall of the movable groove (405), a return spring (408) is installed on the right side of the sealing cover (406), and a pull rod (409) is connected to the left side of the positioning pin (407).

2. A high-reliability high-frequency current sensor according to claim 1, characterized in that: The bottom of the positioning block (404) passes through the limiting groove (403) and extends to the inside of the limiting groove (403), and is snap-connected with the limiting groove (403). A pin groove is provided on the left side of the positioning block (404).

3. A high-reliability high-frequency current sensor according to claim 2, characterized in that: The sealing cover (406) is engaged with the opening on the left side of the movable groove (405), the right end of the return spring (408) passes through the opening of the movable groove (405) and extends to the inside of the movable groove (405), and the size of the positioning pin (407) is adapted to the inner diameter of the pin groove.

4. A high-reliability high-frequency current sensor according to claim 1, characterized in that: A sliding hole is provided between the inner right wall of the movable groove (405) and the inner left wall of the limiting groove (403); the positioning pin (407) passes through the sliding hole and extends to the inside of the limiting groove (403), and is slidably connected to the sliding hole.

5. A high-reliability high-frequency current sensor according to claim 1, characterized in that: A pressure plate is installed at the left end of the positioning pin (407), the right end of the pull rod (409) is connected to the left side of the pressure plate, the right end of the return spring (408) is in contact with the left side of the pressure plate, and the return spring (408) is sleeved on the outside of the pull rod (409).

6. A high-reliability high-frequency current sensor according to claim 1, characterized in that: A circular hole is provided on the right side of the sealing cover (406), the pull rod (409) passes through the circular hole and extends to the outside of the sealing cover (406), and a groove opening is provided on the top of the pull rod (409).

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