A switch cabinet electricity testing device

Abstract

The application discloses a switch cabinet electricity testing device, which comprises a contact electricity tester and a support frame, and further comprises a lifting assembly arranged on the support frame, a sliding cylinder arranged horizontally, a piston assembly arranged in the sliding cylinder and movable along the axis of the sliding cylinder, an elastic accommodating member arranged in the piston assembly, a gas guide plate arranged at one end of the sliding cylinder, a gas guide assembly arranged on the gas guide plate and used for connecting an external pressure gas source, an elastic member arranged between the piston assembly and the gas guide plate, and a pressure relief pipe connected with the sliding cylinder and provided with a valve. The lifting assembly is used for driving the gas guide plate to move up and down. The application can reduce the shaking of the electricity testing probe, thereby ensuring the accuracy and reliability of the electricity testing result.

Description

Technical Field

[0001] This invention relates to the field of switchgear technology, and more specifically to a switchgear voltage testing device. Background Technology

[0002] High-voltage switchgear is used in power systems to control, protect, and isolate electrical equipment. It is usually tested for voltage using voltage testing devices to ensure that maintenance personnel can work safely in a de-energized state. Existing voltage testing devices typically use contact voltage detectors, which are usually driven by hydraulic cylinders or electric telescopic rods to move the voltage detector close to the stationary contact. During the movement of the voltage detector, the voltage detector probe is prone to vibration, which can lead to unreliable contact between the voltage detector probe and the stationary contact, potentially affecting the accuracy and reliability of the voltage testing results. Summary of the Invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of this invention is to provide a switchgear voltage testing device to ensure the accuracy and reliability of voltage testing results.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a switchgear voltage detection device, including a contact voltage detector and a support frame, and further including: a lifting assembly, which is mounted on the support frame; a slide cylinder, which is horizontally positioned; a piston assembly, which is fitted inside the slide cylinder and can move along the axis of the slide cylinder; an elastic housing, which is fitted inside the piston assembly; an air guide plate, which is mounted at one end of the slide cylinder; an air guide assembly, which is mounted on the air guide plate and is used to connect to an external pressure air source; an elastic element, which is mounted between the piston assembly and the air guide plate; and a pressure relief pipe, which is connected to the slide cylinder and is equipped with a valve; wherein, the lifting assembly is used to drive the air guide plate to move up and down; the contact voltage detector is fitted inside the elastic housing and extends out of the slide cylinder.

[0005] Furthermore, the piston assembly includes: a piston head, on which an annular groove is provided, the annular groove extending to one end of the piston assembly near the air guide plate, the inner annular surface of the annular groove being tapered; a sleeve, the sleeve being fitted inside the annular groove; wherein, an elastic element is fitted on the inner annular surface of the annular groove.

[0006] Furthermore, the piston assembly also includes a slip ring, which is coaxially disposed at one end of the piston head near the guide plate, and the slip ring is fitted inside the slide cylinder.

[0007] Furthermore, the elastic element includes a conical spring, which is fitted onto the outer surface of the inner ring of the annular groove, with the sleeve and air guide plate fixedly connected to both ends of the conical spring, respectively.

[0008] Furthermore, a groove is provided on the piston head, and an elastic receiving element is fitted inside the groove; an annular groove is located outside the groove and extends to the other end of the piston head.

[0009] Furthermore, the elastic receiving element includes: a receiving cylinder adapted to a portion of the electroscope; a clamping strip, with multiple clamping strips provided at one end of the receiving cylinder, the multiple clamping strips being evenly distributed around the circumference of the receiving cylinder axis, and each clamping strip being used to contact the contact electroscope; and a guide strip, with a guide strip provided at the end of each clamping strip away from the receiving cylinder.

[0010] Furthermore, the resilient housing also includes a stop block disposed inside the housing cylinder, which contacts the contact voltage detector.

[0011] Furthermore, the air guide plate is provided with multiple exhaust holes, which are evenly distributed around the circumference of the slide cylinder axis, and each exhaust hole extends through to one end of the air guide plate adjacent to the piston assembly; the air guide plate is provided with an air guide cavity inside, and each exhaust hole is connected to the air guide cavity.

[0012] Furthermore, the gas guiding assembly includes a gas connector, which is disposed on the gas guiding plate, communicates with the gas guiding cavity, and is used to connect to an external pressure gas source.

[0013] Furthermore, the lifting assembly includes a linear module mounted on a support frame, and an air guide plate mounted on the linear module. The linear module is used to drive the air guide plate to move up and down.

[0014] The beneficial effects of the present invention are as follows.

[0015] 1. This invention is applied in the manufacturing of power distribution switch control equipment. This invention drives the piston head to move along the slide cylinder by introducing pressurized airflow. An elastic retainer is fitted in the piston head, and a contact voltage detector cooperates with the elastic retainer. During the movement of the contact voltage detector, it is easy to reduce the vibration of the voltage detector probe, ensuring reliable contact between the voltage detector probe and the stationary contact of the electrical equipment, thereby ensuring the accuracy and reliability of the voltage detection results.

[0016] 2. During the airflow introduction process, it is easy to cause the piston head to exert pressure on the elastic housing; and as the conical spring pulls the rope, the conical spring exerts a squeezing effect on the piston head, which in turn exerts pressure on the elastic housing, thereby improving the fixation effect of the contact detector while it is moving.

[0017] 3. By combining the contact voltage detector with the elastic housing, the contact voltage detector can be detached; when not performing voltage testing, the contact voltage detector can be easily disassembled and stored. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the present invention from another angle.

[0021] Figure 3 This is a partial structural cross-sectional view of the present invention.

[0022] Figure 4 This is a schematic cross-sectional view of the piston head of the present invention.

[0023] Figure 5 This is a schematic diagram of the elastic accommodating member structure of the present invention.

[0024] Figure 6 This is a schematic diagram showing the fit between the conical spring, sleeve, and piston head of the present invention.

[0025] Figure 7 This is a schematic diagram of the air guide plate structure of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Support frame; 11. Caster wheel; 2. Lifting assembly; 21. Linear module; 3. Slide cylinder; 31. Pressure relief pipe; 4. Contact voltage detector; 5. Gas guiding assembly; 51. Gas connector; 6. Gas guide plate; 61. Gas guiding chamber; 62. Exhaust port; 7. Piston assembly; 71. Piston head; 711. Circular groove; 712. Slot; 72. Slip ring; 73. Sleeve; 8. Elastic retainer; 81. Retaining cylinder; 82. Pressing strip; 83. Guide strip; 84. Stop block; 9. Elastic element; 91. Conical spring. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figures 1 to 7As shown, the present invention provides a switch cabinet voltage detection device, including a support frame 1. Multiple casters 11 are evenly distributed at the bottom of the support frame 1, facilitating its movement. A lifting assembly 2 is mounted on the support frame 1, and a slide cylinder 3 is mounted on the lifting assembly 2. The lifting assembly 2 drives the slide cylinder 3 to move up and down. The slide cylinder 3 is horizontally positioned, meaning its axis is horizontal. A piston assembly 7 is fitted inside the slide cylinder 3, and the piston assembly 7 can move along the axis of the slide cylinder 3. An elastic retainer 8 is fitted inside the piston assembly 7, and the elastic retainer 8 is used to fix a contact voltage detector 4. The contact voltage detector 4 adopts existing technology and includes a housing. The housing is directly connected to a cylindrical handle (without a telescopic rod). A voltage detector probe is mounted on the housing, and circuitry, audio-visual components, etc., are also mounted on the housing. The handle of the contact voltage detector 4 is used to cooperate with the elastic retainer 8. When the contact voltage detector 4 cooperates with the elastic retainer 8, both the housing and the voltage detector probe of the contact voltage detector 4 extend out of the slide cylinder 3.

[0030] A guide plate 6 is sealed to one end of the slide cylinder 3. The guide plate 6 has a guide cavity 61 inside and multiple exhaust holes 62 are provided on the guide plate 6. Each exhaust hole 62 extends to the end of the guide plate 6 adjacent to the piston assembly 7, thereby enabling the exhaust hole 62 to connect to the inside of the slide cylinder 3. A guide assembly 5 is provided on the guide plate 6. The guide assembly 5 is used to connect to an external pressure air source. The external pressure air source introduces pressurized air into the guide cavity 61, and then the pressurized air is introduced into the cavity formed by the piston assembly 7, the guide plate 6, and the slide cylinder 3 through the exhaust holes 62, so as to push the piston assembly 7 to move along the axis of the slide cylinder 3. In order to prevent the piston assembly 7 from moving out of the slide cylinder 3, a limiting block or limiting ring or other structure can be provided at the end of the slide cylinder 3 that is not connected to the guide plate 6 for blocking.

[0031] An elastic element 9 is provided between the piston assembly 7 and the air guide plate 6, and a pressure relief pipe 31 is connected to the slide cylinder 3, with a valve provided on the pressure relief pipe 31.

[0032] The piston assembly 7 includes a piston head 71 fitted inside the slide 3. The piston head 71 is made of an elastic material, such as rubber or silicone. A circular annular groove 711 is coaxially arranged on the piston head 71, and the circular annular groove 711 passes through one end of the piston head 71 adjacent to the air guide plate 6. The circular annular groove 711 has two circumferential surfaces, namely an inner annular surface and an outer annular surface. The inner annular surface of the circular annular groove 711 is tapered. From one end of the slide 3 adjacent to the air guide plate 6 to the other end of the slide 3, the diameter of the inner annular surface of the circular annular groove 711 gradually increases. When the piston head 71 is in its normal state without deformation, the circular annular groove 711 is coaxial with the slide 3. Multiple exhaust holes 62 on the air guide plate 6 are evenly distributed circumferentially along the axis of the slide 3, and each exhaust hole 62 corresponds to the circular annular groove 711.

[0033] A sleeve 73 is provided inside the annular groove 711. The sleeve 73 is fitted onto the outer annular surface of the annular groove 711 and the annular inner wall of the annular groove 711 (e.g., Figure 3 As shown, on the left inner wall of the annular groove 711, the sleeve 73 has a thin-walled structure and is made of a material that is not easily deformed, such as metal or composite material.

[0034] The piston assembly 7 also includes a slip ring 72, which is coaxially disposed at one end of the piston head 71 near the gas guide plate 6. The slip ring 72 is fixedly connected to the piston head 71 and is also disposed inside the slide cylinder 3. The slip ring 72 can also move along the axial direction of the slide cylinder 3.

[0035] The elastic element 9 adopts a conical spring 91. A part of the conical spring 91 is fitted and set outside the inner ring surface of the annular groove 711. One end of the conical spring 91 is fixedly connected to the sleeve 73, and the other end of the conical sleeve 73 is fixedly connected to the air guide plate 6.

[0036] The elastic receiving component 8 includes a receiving cylinder 81, inside which a stop 84 is provided. The stop 84 is made of a material that is not easily deformed. One end of the receiving cylinder 81 is closed, and the other end of the receiving cylinder 81 is provided with multiple pressing strips 82. Each pressing strip 82 has a guide strip 83 at the end away from the receiving cylinder 81. The guide strip 83 is tapered, and the connection between the guide strip 83 and the pressing strip 82 is rounded. The receiving cylinder 81, pressing strips 82, and guide strips 83 are integrally molded, and can be made of polyethylene, thus having good elasticity. The pressing strip 82 has an arc-shaped cross-section. When the receiving cylinder 81, pressing strip 82, and guide strip 83 are not deformed as a whole... The receiving cylinder 81 is adapted to the handle of the contact electroscope 4. The receiving cylinder 81 is coaxial with the sliding cylinder 3. Multiple clamping strips 82 are evenly distributed around the circumference of the receiving cylinder 81. At this time, the multiple clamping strips 82 and the handle of the contact electroscope 4 are interference fit. Thus, when one end of the handle of the contact electroscope is fitted inside the receiving cylinder 81 and contacts the stop block 84, the clamping strips 82 contact the handle of the contact electroscope 4 and press the handle of the contact electroscope 4, thereby fixing the contact electroscope 4. The end of the guide strip 83 away from the clamping strips 82 does not contact the handle of the contact electroscope 4. The guide strip 83 facilitates the insertion of the handle of the contact electroscope 4 between the clamping strips 82.

[0037] A groove 712 is provided in the middle of the piston head 71, and the groove 712 extends to the other end of the piston head 71. An elastic receiving member 8 is provided in the groove 712. Specifically, the receiving cylinder 81, the pressing strip 82, and the guide strip 83 are all fitted inside the groove 712. The receiving cylinder 81 is fixedly connected to the piston head 71 by adhesive or the like. The pressing strip 82 and the guide strip 83 are fitted in the groove 712 and are not fixedly connected.

[0038] In this embodiment, when one end of the handle of the contact detector 4 is fitted inside the receiving cylinder 81 and contacts the stop block 84, the clamping strip 82 contacts and presses the handle of the contact detector 4, thereby fixing the contact detector 4 and facilitating its fitting onto the elastic receiving member 8. Then, by moving the support frame 1 and adjusting the position of the sliding cylinder 3 via the lifting assembly 2, the voltage detection probe of the contact detector 4 is moved to correspond with the stationary contact of the switchgear electrical equipment. Next, the valve on the pressure relief pipe 31 is closed, and pressurized air is introduced into the air guide plate 6 via the air guide assembly 5. The pressurized airflow is discharged through the exhaust hole 62 toward the annular groove 711. As the air pressure increases, when the piston head 71 overcomes various... Resistance (including friction between piston head 71 and slide cylinder 3, friction between slip ring 72 and slide cylinder 3, tension of conical spring 91, atmospheric pressure at the other end of piston head 71, etc.) allows it to move slowly away from the air guide plate 6 (this can be achieved by controlling the gas flow rate and pressure of the external pressure air source introduced into the air guide chamber 61, which is existing technology and will not be described in detail). Conical spring 91 is stretched, which at the same time drives the voltage detection probe of contact voltage detector 4 to move until the voltage detection probe contacts the stationary contact of the electrical equipment. At this time, the external pressure air source stops introducing airflow into the air guide plate 6 in time, thereby achieving the voltage detection function. Finally, by opening the valve on the pressure relief pipe 31 to release the gas, conical spring 91 retracts and pulls piston head 71 to move.

[0039] The piston head 71 is driven to move slowly by increasing air pressure, and the piston head 71 has a relatively long overall length. During the airflow introduction process, the pressurized airflow exerts pressure on the inner ring surface of the annular groove 711. Since the piston head 71 is made of elastic material, it is easy for the piston head 71 to exert pressure on the elastic receiving member 8. Furthermore, as the conical spring 91 is stretched, the portion of the conical spring 91 that is sleeved on the inner ring surface of the annular groove 711 will contract, thereby squeezing the piston head 71 and further exerting pressure on the elastic receiving member 8, thus achieving contact-type... The movement of the voltage detector 4 enhances the clamping effect on the contact voltage detector 4. Simultaneously, the sleeve 73 and slip ring 72 help reduce the pressure of airflow on the part of the piston head 71 near the outer ring surface. Furthermore, the elasticity of the piston head 71 and clamping strip 82 improves the stability of the movement of the piston head 71 and the contact voltage detector 4, reducing vibration of the voltage detector probe. This ensures reliable contact between the voltage detector probe and the stationary contact of the electrical equipment, preventing intermittent disengagement of the voltage detector probe from the stationary contact of the electrical equipment due to vibration, thus avoiding misjudgment and ensuring the accuracy and reliability of the voltage detection results.

[0040] In addition, by cooperating with the elastic housing 8, the contact voltage detector 4 can be easily disassembled after voltage testing is completed, and can be easily disassembled and stored when voltage testing is not performed.

[0041] Example 2

[0042] like Figure 2 and Figure 3 As shown, this embodiment is based on embodiment one. The gas guiding component 5 includes a gas connector 51, which is fixedly mounted on the gas guiding plate 6. One end of the gas connector 51 penetrates the gas guiding plate 6 and connects to the gas guiding cavity 61. The other end of the gas connector 51 is used to connect to an external pressure gas source.

[0043] Example 3

[0044] like Figure 1 and Figure 2 As shown, this embodiment is based on embodiment two. The lifting component 2 adopts a linear module 21. The linear module 21 is vertically installed on the support frame 1. The slider (or slide table) of the linear module 21 is fixedly connected to the air guide plate 6, so that the air guide plate 6 can be driven to move up and down, thereby further adjusting the height of the slide cylinder 3 and the piston head 71. Of course, the lifting component 2 can also adopt hydraulic rods, electric telescopic rods, etc., which can also adjust the height of the slide cylinder 3 and the piston head 71.

[0045] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A switchgear electricity testing device comprising a contact electricity tester (4) and a support frame (1), characterized in that, Also include: Lifting assembly (2), lifting assembly (2) is arranged on the support frame (1); Slide cylinder (3), slide cylinder (3) is arranged horizontally; Piston assembly (7), piston assembly (7) is arranged in the inside of slide cylinder (3), piston assembly (7) can move along the axis direction of slide cylinder (3); Elastic containing piece (8), elastic containing piece (8) is arranged in the inside of piston assembly (7); Air guide plate (6), air guide plate (6) is arranged at one end of slide cylinder (3); Air guide assembly (5), air guide assembly (5) is arranged on air guide plate (6), and air guide assembly (5) is used for connecting external pressure gas source; Elastic piece (9), elastic piece (9) is arranged between piston assembly (7) and air guide plate (6); Pressure relief pipe (31), pressure relief pipe (31) is connected with slide cylinder (3), and valve is arranged on pressure relief pipe (31); Wherein, lifting assembly (2) is used for driving air guide plate (6) to move up and down; Contact type electroscope (4) is used for being arranged in the inside of elastic containing piece (8), and contact type electroscope (4) penetrates slide cylinder (3); Piston assembly (7) includes: piston head (71), piston head (71) is provided with circular annular groove (711), circular annular groove (711) extends to one end of piston assembly (7) close to air guide plate (6), and the inner ring surface of circular annular groove (711) is provided with taper; Sleeve (73) is arranged in the inside of circular annular groove (711); Elastic piece (9) is arranged on the inner ring surface of circular annular groove (711); Elastic piece (9) includes conical spring (91), conical spring (91) is arranged in the outside of the inner ring surface of circular annular groove (711), and the two ends of conical spring (91) are fixedly connected with sleeve (73) and air guide plate (6) respectively.

2. The switchgear electricity testing device according to claim 1, characterized in that, Piston assembly (7) further includes sliding ring (72), sliding ring (72) is coaxially arranged at one end of piston head (71) adjacent to air guide plate (6), and sliding ring (72) is arranged in the inside of slide cylinder (3).

3. The switchgear electricity testing device according to claim 1, wherein, Piston head (71) is provided with clamping groove (712), and elastic containing piece (8) is arranged in clamping groove (712); Circular annular groove (711) is located outside clamping groove (712), and circular annular groove (711) extends to the other end of piston head (71).

4. The switchgear electricity testing device according to claim 3, characterized in that, Elastic containing piece (8) includes: Containing cylinder (81), containing cylinder (81) is adapted to a part of contact type electroscope (4); Compression strip (82), one end of containing cylinder (81) is provided with a plurality of compression strips (82), the plurality of compression strips (82) are evenly distributed along the axis circumference of containing cylinder (81), and each compression strip (82) is used for contacting contact type electroscope (4); Guide strip (83), each compression strip (82) is provided with guide strip (83) away from one end of containing cylinder (81).

5. A switchgear electricity testing device according to claim 4, wherein Elastic containing piece (8) further includes stop block (84), stop block (84) is arranged in the inside of containing cylinder (81), and stop block (84) contacts contact type electroscope (4).

6. The switchgear electricity testing device according to claim 1, wherein, A plurality of exhaust holes (62) are arranged on the air guide plate (6), and the plurality of exhaust holes (62) are circumferentially and uniformly distributed along the axis of the sliding cylinder (3); the exhaust holes (62) correspond to the annular grooves (711), and each exhaust hole (62) penetrates to one end of the air guide plate (6) adjacent to the piston assembly (7); An air guide cavity (61) is arranged in the air guide plate (6), and each exhaust hole (62) is communicated with the air guide cavity (61).

7. A switchgear electricity testing device according to claim 6, wherein The air guide assembly (5) comprises a gas joint (51), the gas joint (51) is arranged on the air guide plate (6), the gas joint (51) is communicated with the air guide cavity (61), and the gas joint (51) is used for connecting an external pressure gas source.

8. The switchgear electricity testing device according to claim 1, wherein, The lifting assembly (2) comprises a linear module (21), the linear module (21) is arranged on the support frame (1), the air guide plate (6) is arranged on the linear module (21), and the linear module (21) is used for driving the air guide plate (6) to move up and down.

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