Short-circuit fault protection device for 10KV high-voltage power supply system

Abstract

The utility model relates to a short-circuit fault protection device for a 10KV high-voltage power supply system, and belongs to the technical field of power supply system protection devices. According to the technical scheme, a vacuum air valve (2) and a sealing performance detection device are installed on the outer side of a sealing protection shell (1), and the vacuum air valve (2) is communicated with the interior of the sealing protection shell (1); the sealing performance detection device comprises a detection tube (3) and a detection structure, the detection tube (3) is fixed on the sealing protection shell (1), and the detection structure is installed in the detection tube (3). The beneficial effects of the utility model are that the sealing performance detection device adopting the rubber membrane is additionally arranged, the deformation of the rubber membrane is observed, the sealing performance in the sealing protection shell can be directly observed, the structure is simple, and the cost is lower compared with a mode of using a pressure gauge to detect the sealing performance.

Description

Technical Field

[0001] The utility model relates to a short-circuit fault protection device for a 10KV high-voltage power supply system, belonging to the technical field of power supply system protection devices. Background Art

[0002] After searching, it was found that the prior art, such as a Chinese patent (grant number: CN210272716U), discloses a short-circuit fault protection device for a 10KV power supply system, comprising an upper protective shell and an upper inner shell, wherein a vacuum air valve is movably connected to the outer surface of the upper protective shell, an inlet and outlet short pipe is fixedly connected to one side of the upper protective shell, a sealing connecting plate is fixedly connected to one side of the upper protective shell, the sealing connecting plate is threadedly connected to the lower protective shell by bolts, and the upper protective shell is fixedly connected to the upper inner shell by an insulating rubber layer.

[0003] The above-mentioned public technology enables the 10KV power supply system short-circuit fault protection device to isolate arcs by setting an insulating rubber layer. Through the coordinated setting of the sealing connecting plate and the sealing air cushion, the interior of the device can be absolutely sealed during use, thereby playing a sealing role.

[0004] However, after long-term use, the above-mentioned device, especially the various air cushions, will age, which will cause problems with the internal sealing of the entire protective device, which will lead to problems with the normal use of the entire protective device and affect arc extinguishing. Therefore, it is necessary to make improvements on this basis and add a sealing detection device. Utility Model Content

[0005] The utility model aims to provide a short-circuit fault protection device for a 10KV high-voltage power supply system. By installing a sealing detection device using a rubber membrane and observing the deformation of the rubber membrane, the sealing inside the sealing protective shell can be directly observed. The utility model has a simple structure and is lower in cost than a method of using a pressure gauge to detect the sealing, thereby solving the above-mentioned problems existing in the background technology.

[0006] The technical solution of the utility model is: a short-circuit fault protection device for a 10KV high-voltage power supply system, comprising a sealed protective shell, a vacuum air valve and a sealing detection device are installed on the outside of the sealed protective shell, and the vacuum air valve is connected to the inside of the sealed protective shell; the sealing detection device comprises a detection tube and a detection structure, the detection tube is fixed on the sealed protective shell, and the detection structure is installed inside the detection tube.

[0007] The detection tube is a transparent glass tube, which includes a vertical tube and a horizontal tube. One end of the horizontal tube is fixed to and connected with the upper end of the vertical tube, the lower end of the vertical tube is fixed to the sealing protective shell, and the detection structure is installed on the inner wall of the other end of the horizontal tube.

[0008] The detection structure is a rubber membrane, and the rubber membrane is detachably installed inside the detection tube.

[0009] A circular groove is provided on the other end surface of the transverse tube, the edge of the rubber membrane is embedded in the groove bottom of the circular groove, and a tightening piece is installed in the circular groove.

[0010] The tightening member is a threaded cap, and the threaded cap is threadably fitted in the annular groove.

[0011] A connecting baffle is fixed on the inner wall of the transverse tube near the other end thereof, and a distance is arranged between the connecting baffle and the rubber membrane.

[0012] The connecting baffle comprises more than one supporting plate arranged in a circular array, the ends of the supporting plates close to each other are fixed, and the ends away from each other are fixed on the inner wall of the horizontal tube in an outwardly radial shape.

[0013] The beneficial effect of the utility model is that by installing a sealing detection device using a rubber membrane and observing the deformation of the rubber membrane, the sealing inside the sealing protection shell can be directly observed, the structure is simple, and the cost is lower than the method of using a pressure gauge to detect the sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a sectional view of the main view of the utility model;

[0015] Figure 2 It is a three-dimensional diagram of the sealing detection device of the utility model;

[0016] Figure 3 This is an exploded diagram of the sealing detection device of the utility model;

[0017] Figure 4 It is a cross-sectional view of the main view of the sealing detection device of the utility model;

[0018] In the figure: a sealing protective shell 1, a vacuum air valve 2, a detection tube 3, an annular groove 3-1, a rubber membrane 4, a tightening member 5, and a connecting baffle 6. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the implementation cases of the utility model clearer, the technical solution in the implementation cases of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation cases. Obviously, the implementation cases described are only a small part of the implementation cases of the utility model, rather than all the implementation cases. Based on the implementation cases in the utility model, all other implementation cases obtained by ordinary technicians in this field without making creative work are within the protection scope of the utility model.

[0020] A short-circuit fault protection device for a 10KV high-voltage power supply system comprises a sealed protective shell 1, a vacuum air valve 2 and a sealing detection device are installed on the outer side of the sealed protective shell 1, and the vacuum air valve 2 is connected to the inside of the sealed protective shell 1; the sealing detection device comprises a detection tube 3 and a detection structure, the detection tube 3 is fixed on the sealed protective shell 1, and the detection structure is installed inside the detection tube 3.

[0021] The detection tube 3 is a transparent glass tube, which includes a vertical tube and a horizontal tube. One end of the horizontal tube is fixed to and connected with the upper end of the vertical tube, the lower end of the vertical tube is fixed to the sealing protective shell 1, and the detection structure is installed on the inner wall of the other end of the horizontal tube.

[0022] The detection structure is a rubber membrane 4 , which is detachably installed inside the detection tube 3 .

[0023] A circular groove 3-1 is formed on the other end surface of the transverse tube, and the edge of the rubber membrane 4 is embedded in the bottom of the circular groove 3-1. A tightening member 5 is installed in the circular groove 3-1.

[0024] The tightening member 5 is a threaded cap, which is threadably fitted in the annular groove 3 - 1 .

[0025] A connecting baffle 6 is fixed on the inner wall of the transverse tube near the other end thereof, and a distance is provided between the connecting baffle 6 and the rubber membrane 4 .

[0026] The connecting baffle 6 includes more than one supporting plate arranged in a circular array, and the ends of the supporting plates that are close to each other are fixed, and the ends that are far away from each other are fixed on the inner wall of the horizontal tube in an outward radial shape.

[0027] In actual application, a vacuum air valve 2 connected to the interior of the sealed protective shell 1 is installed on the outside of the sealed protective shell 1. The sealed protective shell 1 and the vacuum air valve 2 are both existing technologies. The sealed protective shell 1 mainly includes an upper protective outer shell, an upper inner tank, short inlet and outlet tubes, and lower inlet and outlet tubes in the Chinese patent (authorization number: CN210272716U). The principle will not be repeated in this utility model.

[0028] Compared with the prior art, the most important difference of the present invention is that a sealing detection device is also installed on the sealing protection shell 1, and the sealing detection device includes a detection tube 3 fixed on the sealing protection shell 1, and a detachable detection structure is installed in the detection tube 3, and the detection structure is a rubber membrane 4 detachably installed on the inner wall of the horizontal tube.

[0029] In order to facilitate the observation of the deformation of the rubber film 4, the detection tube 3 is a transparent glass tube. The detection tube 3 includes a vertical tube and a horizontal tube. One end of the horizontal tube is fixed and connected to the upper end of the vertical tube, and the lower end of the vertical tube is fixed to the sealing protective shell 1. The detection structure is installed inside the other end of the horizontal tube.

[0030] In order to realize the detachable replacement of the rubber membrane 4, an annular groove 3-1 is opened on the other end face of the horizontal tube, and the edge of the rubber membrane 4 is embedded in the bottom of the annular groove 3-1. A detachable tightening part 5 is installed in the annular groove 3-1. The tightening part 5 is a threaded cap, and the threaded cap is threadedly fitted in the annular groove 3-1.

[0031] In order to support the rubber membrane 4, a connecting baffle 6 is fixed on the inner wall of the transverse tube near the other end thereof. The connecting baffle 6 includes a plurality of support plates arranged in a circular array. The ends of the support plates that are close to each other are fixed to each other, and the ends that are far away from each other are fixed to the inner wall of the transverse tube in a radially outward manner. A spacing is left between the connecting baffle 6 and the rubber membrane 4.

[0032] The working principle is as follows: if the sealing performance of the sealing protective shell 1 is normal, after the vacuum is drawn through the vacuum air valve 2, the internal pressure becomes smaller, and the atmospheric pressure will press the rubber membrane 4 to deform toward the vertical tube. The connecting baffle 6 supports the rubber membrane 4 to prevent damage due to excessive deformation. If there is a problem with the sealing performance of the sealing protective shell 1, the rubber membrane 4 will not be deformed. If there is a problem with the sealing performance of the sealing protective shell 1 during use, the rubber membrane 4 will automatically return to its original position. At this time, since the detection tube 3 is a transparent glass tube, the deformation of the rubber membrane 4 can be directly observed, and the electric sparks generated by the circuit failure will not enter the horizontal tube through the vertical tube and burn the rubber membrane 4. When the rubber membrane 4 needs to be replaced, turn the tightening piece 5 to unscrew it from the horizontal tube, and the rubber membrane 4 can be removed from the annular groove 3-1. During installation, the edge of the rubber membrane 4 is pressed tightly in the annular groove 3-1, acting as a sealing gasket to achieve sealing between the inner side of the rubber membrane 4 and the outside world, achieving two goals at one stroke.

[0033] Finally, the most important contribution of the present invention is that when there is no problem with the sealing performance of the sealing protective shell 1, after vacuuming, the rubber membrane 4 will be recessed toward the side of the connecting baffle 6; if there is a problem with the sealing performance of the sealing protective shell 1, the rubber membrane 4 will return to normal. By observing the deformation of the rubber membrane 4, the sealing performance of the inside of the sealing protective shell 1 can be directly observed. The structure is simple and the cost is lower than that of using a pressure gauge to detect the sealing performance.

[0034] 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 10KV high voltage power supply system short circuit fault protection device, characterized in that: The invention comprises a sealing protective shell (1), wherein a vacuum air valve (2) and a sealing detection device are installed on the outside of the sealing protective shell (1), and the vacuum air valve (2) is connected to the inside of the sealing protective shell (1); the sealing detection device comprises a detection tube (3) and a detection structure, wherein the detection tube (3) is fixed on the sealing protective shell (1), and the detection structure is installed inside the detection tube (3).

2. A 10KV high voltage power supply system short circuit fault protection device according to claim 1, characterized in that: The detection tube (3) is a transparent glass tube, comprising a vertical tube and a horizontal tube, one end of the horizontal tube being fixed to and connected with the upper end of the vertical tube, the lower end of the vertical tube being fixed to the sealing protective shell (1), and the detection structure being mounted on the inner wall of the other end of the horizontal tube.

3. A 10KV high voltage power supply system short circuit fault protection device according to claim 2, characterized in that: The detection structure is a rubber membrane (4), and the rubber membrane (4) is detachably mounted inside the detection tube (3).

4. A 10KV high voltage power supply system short circuit fault protection device according to claim 3, characterized in that: A circular groove (3-1) is provided on the other end surface of the transverse tube, the edge of the rubber membrane (4) is embedded in the bottom of the circular groove (3-1), and a tightening member (5) is installed in the circular groove (3-1).

5. A 10KV high voltage power supply system short circuit fault protection device according to claim 4, characterized in that: The tightening member (5) is a threaded cap, which is threadably fitted in the annular groove (3-1).

6. A 10KV high voltage power supply system short circuit fault protection device according to claim 3, characterized in that: A connecting baffle (6) is fixed on the inner wall of the transverse tube near the other end thereof, and a distance is provided between the connecting baffle (6) and the rubber membrane (4).

7. A 10KV high voltage power supply system short circuit fault protection device according to claim 6, characterized in that: The connecting baffle (6) comprises more than one support plate arranged in a circular array, wherein the ends of the support plates that are close to each other are fixed, and the ends that are far away from each other are fixed on the inner wall of the horizontal tube in an outwardly radial shape.

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