CN220932294U

CN220932294U - Transformer tightness testing device

Info

Publication number: CN220932294U
Application number: CN202322691427.8U
Authority: CN
Inventors: 蓝惠斌; 蓝艺斌
Original assignee: Xiamen Hesheng Electric Technology Co ltd
Current assignee: Xiamen Hesheng Electric Technology Co ltd
Priority date: 2023-10-08
Filing date: 2023-10-08
Publication date: 2024-05-10
Anticipated expiration: 2033-10-08

Abstract

The utility model relates to the technical field of transformer tightness detection, in particular to a transformer tightness testing device which comprises a machine case, an air duct, a first valve seat, a barometer and a sealing cover. An air compressor is arranged in the case, an air outlet pipe is arranged at the output end of the air compressor, and a connector is arranged at the end head of the air outlet pipe. The air duct is provided with an air inlet pipe communicated with the inside of the air duct, and the connector is detachably connected with the air inlet pipe. The first valve seat is arranged in the air inlet pipe, a sliding rod which is in sliding connection with the first valve seat is arranged in the first valve seat, the sliding rod is connected with the valve cover, the valve cover is close to the air guide pipe, and the valve cover is in sealing fit with the first valve seat. The barometer sets up on the top of air duct and communicates with its inside, and the bottom of air duct sets up the grafting end of communicating with its inside. The sealing cover is arranged on the air duct in a sliding way, and a rotary sleeve for driving the sealing cover to lift is arranged on the air duct in a spiral way. The utility model has high air tightness when being connected with the transformer, and the air inlet pipe is automatically turned off when the inflation is stopped, so that manual operation is not needed, and time and labor are saved.

Description

Transformer tightness testing device

Technical Field

The utility model relates to the technical field of transformer tightness detection, in particular to a transformer tightness testing device.

Background

After the transformer is assembled, the tightness of the oil tank needs to be detected, and the tightness monitoring mode comprises a static oil column method and a static air pressure method, wherein the static air pressure method is the most common method. The static pressure method is to remove the moisture absorber on the oil storage cabinet, connect a three-way joint, let the nitrogen in the nitrogen bottle into the oil storage and pumping cabinet or the rubber bag after the nitrogen is depressurized by the depressurization meter valve, close the valve, and the pressure gauge 12h is not remarkably reduced.

The Chinese patent with the issued bulletin number of CN205317427U discloses a leakage testing device for a transformer, and belongs to the technical field of transformer production test. The three-way pipeline is characterized by comprising a three-way pipeline, a connecting joint and a sealing gasket, wherein a rotary valve is arranged on an upper channel of the three-way pipeline, a pressure gauge is arranged on a left channel of the three-way pipeline, a threaded air tap connected with an air compressor is manufactured on a right channel of the three-way pipeline, and the lower end of the three-way pipeline is connected with a pressure testing port of a transformer box body through the connecting joint. The utility model adopts the three-way pipeline structure to connect the rotary valve, the pressure gauge and the threaded air tap, has simple connection structure and good sealing performance, can accurately control the test pressure, and can conveniently inject air pressure and exhaust air. In addition, the thread air tap and the three-way pipeline are of an integrated structure, so that the connecting link is reduced, the air tightness of the leakage testing device is well ensured, the accuracy of the tightness test is greatly improved, the phenomenon that misjudgment is easy to occur in the prior art is avoided, and the production efficiency is improved.

However, the device still has the defects that: when the device is in actual use, the air inlet is required to be manually turned off or turned on, and the air turning-off structure in the structure is mainly driven by the threaded valve rod and can be turned for a plurality of times, so that the device is troublesome to operate.

Disclosure of utility model

The utility model aims to solve the problems in the background art and provides a transformer tightness testing device.

The technical scheme of the utility model is as follows: a transformer tightness testing device comprises a machine case, an air duct, a first valve seat, a barometer and a sealing cover.

An air compressor is arranged in the case, an air outlet pipe is arranged at the output end of the air compressor, and a connector is arranged at the end head of the air outlet pipe. The air duct is provided with an air inlet pipe communicated with the inside of the air duct, and the connector is detachably connected with the air inlet pipe.

The first valve seat is arranged in the air inlet pipe, a sliding rod which is in sliding connection with the first valve seat is arranged in the first valve seat, the sliding rod is connected with the valve cover, the valve cover is close to the air guide pipe, and the valve cover is in sealing fit with the first valve seat.

The barometer sets up on the top of air duct and communicates with its inside, and the bottom of air duct sets up the grafting end of communicating with its inside. The sealing cover is arranged on the air duct in a sliding way, a rotary sleeve is arranged on the air duct in a spiral way, and the bottom of the rotary sleeve is rotationally connected with the sealing cover.

Preferably, the cabinet is internally provided with a storage groove, the air duct is positioned in the storage groove, and the cabinet is provided with a cabinet door in sealing fit with the storage groove.

Preferably, a switch key is arranged on the case, a lifting handle is arranged on the case, and an anti-slip pad is arranged at the bottom of the case.

Preferably, the air inlet pipe is in spiral connection with the connector, and a pipe cover is hung on the air inlet pipe and is in spiral connection with the air inlet pipe.

Preferably, a plurality of auxiliary rotary driving rods are arranged on the air duct.

Preferably, the inner side of the first valve seat is provided with an air inlet channel, the valve cover is provided with a plug, the plug is inserted into the air inlet channel and is in sliding connection with the air inlet channel, one side, far away from the valve cover, of the first valve seat is provided with a limiting groove, a spring is arranged in the limiting groove, the spring is coated on the sliding rod, and two ends of the spring are respectively abutted with the inner wall of the limiting groove and the limiting plate on the outer side of the sliding rod.

Preferably, a sealing ring is arranged on the lower end surface of the sealing cover.

Preferably, the bottom of the sealing cover is integrally provided with a flexible gasket.

Compared with the prior art, the utility model has the following beneficial technical effects:

The first valve seat is arranged in the air inlet pipe, the valve cover which is in sealing fit with the first valve seat is elastically arranged on the first valve seat in a sliding manner, when the transformer oil storage cabinet is inflated, the valve cover is automatically opened, and when the inflation is stopped, the valve cover is automatically closed under the action of air flow reverse thrust, so that manual operation is not needed, and time and labor are saved; through set up rather than sliding and sealed complex sealed lid in the air duct bottom to set up on the air duct rather than spiral connection's cover soon, cover soon rotates with sealed lid to be connected, when cover soon rotates, sealed cover rises or descends under the drive of cover soon, and this structure can improve the connection seal between this device and the transformer casing through pushing down sealed lid when the air duct is connected the transformer, prevents gas leakage.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is an internal structural view of the airway tube;

FIG. 3 is a diagram showing the connection structure of the first valve seat and the valve cover;

FIG. 4 is a diagram showing the connection of various components of an airway in another embodiment of the present utility model;

fig. 5 is a schematic view illustrating an internal structure of an airway tube according to another embodiment of the present utility model.

Reference numerals: 1. a chassis; 101. a storage groove; 2. a door; 3. an air compressor; 4. an air outlet pipe; 5. a connector; 6. an air duct; 601. a plug-in end; 7. an air inlet pipe; 8. a first valve seat; 801. an air intake passage; 9. a slide bar; 10. a valve cover; 11. a spring; 12. a barometer; 13. a rotary sleeve; 14. sealing cover; 15. a seal ring; 61. a second valve seat; 62. a limiting ring; 63. an internal threaded rod; 64. a knob; 65. a stud; 66. and (5) measuring the pressure of the pipe.

Detailed Description

Example 1

As shown in fig. 1-3, the device for testing the tightness of the transformer provided by the utility model comprises a case 1, an air duct 6, a first valve seat 8, a barometer 12 and a sealing cover 14.

The cabinet 1 is internally provided with a storage groove 101, the air duct 6 is positioned in the storage groove 101, the cabinet 1 is provided with a cabinet door 2 in sealing fit with the storage groove 101, the cabinet 1 is provided with a switch key, the cabinet 1 is provided with a lifting handle, and the bottom of the cabinet 1 is provided with an anti-slip pad. An air compressor 3 is arranged in the case 1, an air outlet pipe 4 is arranged at the output end of the air compressor 3, and a connector 5 is arranged at the end of the air outlet pipe 4. The air duct 6 is provided with an air inlet pipe 7 communicated with the inside of the air duct, the air inlet pipe 7 is in spiral connection with the connector 5, and the air inlet pipe 7 is hung with a pipe cover which is in spiral connection with the air inlet pipe 7.

The first valve seat 8 is arranged in the air inlet pipe 7, a sliding rod 9 which is connected with the first valve seat 8 in a sliding way is arranged in the first valve seat 8, the sliding rod 9 is connected with a valve cover 10, the valve cover 10 is close to the air guide pipe 6, and the valve cover 10 is in sealing fit with the first valve seat 8.

The barometer 12 is arranged at the top end of the air duct 6 and is communicated with the inside of the air duct, and the bottom of the air duct 6 is provided with a plug-in end 601 communicated with the inside of the air duct. The sealing cover 14 is arranged on the air duct 6 in a sliding way, the air duct 6 is provided with a spiral sleeve 13 in a spiral way, and the bottom of the spiral sleeve 13 is rotationally connected with the sealing cover 14. The bottom of the sealing cover 14 is integrally provided with a flexible gasket, and the lower end surface of the sealing cover 14 is provided with a sealing ring 15.

In this embodiment, when in actual use, the oil storage cabinet moisture absorber is detached firstly, at this time, the top feed hole of the oil storage cabinet is in an open state, the air duct 6 is taken out from the chassis 1, then the bottom plug end of the air duct 6 is inserted into the inner side of the feed hole and screwed, then the rotary sleeve 13 is rotated, the rotary sleeve 13 presses down the sealing cover 14 to tightly fit with the transformer shell, then the air compressor 3 is opened, the air compressor 3 injects air into the air duct 6 along the air duct 4 and is led into the transformer oil storage cabinet or the capsule, then the connector 5 is detached from the air inlet pipe 7, at this time, the sealing cover 10 in the air inlet pipe 7 is pushed against the first valve seat 8 by the air pressure to prevent the air duct 6 and the air in the transformer from overflowing, in order to further prevent the air from overflowing, the suspended pipe cover on the air inlet pipe 7 plugs the air inlet of the air inlet pipe, at this time, the air pressure value of the air pressure meter 12 is recorded, after waiting a certain time, the numerical value of the air pressure meter 12 is recorded again, the two numerical values are summarized and calculated, thus the sealing data of the transformer are obtained, the whole structure is good in sealing performance, and the air inlet pipe 7 does not need to be manually cut off when the air injection is performed.

Example two

As shown in fig. 3, in the transformer tightness testing device according to the present utility model, compared with the first embodiment, the air inlet channel 801 is disposed at the inner side of the first valve seat 8, the plug is disposed on the valve cover 10, the plug is inserted into the air inlet channel 801 and slidingly connected with the air inlet channel 801, a limit groove is disposed at one side of the first valve seat 8 far away from the valve cover 10, a spring 11 is disposed in the limit groove, the spring 11 is wrapped on the slide rod 9, and two ends of the spring 11 are respectively abutted against the inner wall of the limit groove and the limit plate at the outer side of the slide rod 9.

In this embodiment, when the valve cover 10 is directly pushed open by high-pressure gas to be inflated, the spring 11 is automatically compressed under the pulling action of the valve cover 10, when the gas supply is stopped, the valve cover 10 is quickly reset and pulled by the tension of the spring 11, so that the valve cover 10 is prevented from sliding back and sealing at too low speed, and meanwhile, the valve cover 10 can be more tightly connected with the first valve seat 8 by the spring 11, so that the sealing performance of the structure is improved.

Example III

As shown in fig. 4 and 5, in the transformer tightness testing device according to the present utility model, compared with the first embodiment, the air duct 6 is provided with the air inlet pipe 7 and the pressure measuring pipe 66 which are communicated with the inside thereof, and the pressure measuring pipe 66 is communicated with the barometer 12. The second valve seat 61 is arranged in the air duct 6, the second valve seat 61 is positioned between the air inlet pipe 7 and the pipe orifice of the pressure measuring pipe 66, the piston 62 is arranged in the air duct 6, the top end of the piston 62 is provided with the internal threaded rod 63 which is in sliding connection with the inner wall of the air duct 6, the air duct 6 is provided with the knob 64, the bottom of the knob 64 is connected with the stud 65, the stud 65 is rotationally connected with the top cover of the air duct 6, and the stud 65 is inserted into the internal threaded rod 63 and is in threaded connection with the internal threaded rod 63.

In this embodiment, when the air intake is turned off, only the knob 64 needs to be rotated to drive the stud 65 to rotate, the stud 65 rotates in the internal threaded rod 62 to push down the piston 62, the air intake pipe 7 is turned off by using the cooperation of the piston 62 and the second valve seat 61, and meanwhile, the air injected into the detected transformer is prevented from being discharged from the air intake pipe 7.

The embodiments of the present utility model have been described in detail with reference to the drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model.

Claims

1. The transformer tightness testing device is characterized by comprising a machine case (1), an air duct (6), a first valve seat (8), a barometer (12) and a sealing cover (14);

An air compressor (3) is arranged in the case (1), an air outlet pipe (4) is arranged at the output end of the air compressor (3), and a connector (5) is arranged at the end of the air outlet pipe (4); an air inlet pipe (7) communicated with the inside of the air guide pipe (6) is arranged on the air guide pipe, and the connector (5) is detachably connected with the air inlet pipe (7);

the first valve seat (8) is arranged in the air inlet pipe (7), a sliding rod (9) which is in sliding connection with the first valve seat (8) is arranged in the first valve seat (8), the sliding rod (9) is connected with a valve cover (10), the valve cover (10) is close to the air guide pipe (6), and the valve cover (10) is in sealing fit with the first valve seat (8);

The barometer (12) is arranged at the top end of the air duct (6) and is communicated with the inside of the air duct, and the bottom of the air duct (6) is provided with an inserting end (601) communicated with the inside of the air duct; the sealing cover (14) is arranged on the air duct (6) in a sliding way, the air duct (6) is spirally provided with a rotary sleeve (13), and the bottom of the rotary sleeve (13) is rotationally connected with the sealing cover (14).

2. The transformer tightness testing device according to claim 1, wherein the housing groove (101) is formed in the case (1), the air duct (6) is located in the housing groove (101), and the case (1) is provided with a case door (2) in sealing fit with the housing groove (101).

3. The transformer tightness testing device according to claim 1, wherein the case (1) is provided with a switch key, the case (1) is provided with a lifting handle, and the bottom of the case (1) is provided with an anti-slip pad.

4. The transformer tightness testing device according to claim 1, wherein the air inlet pipe (7) is in spiral connection with the connector (5), and a pipe cover is hung on the air inlet pipe (7), and the pipe cover is in spiral connection with the air inlet pipe (7).

5. A transformer tightness testing device according to claim 1, characterized in that the air duct (6) is provided with a number of auxiliary rotary driving rods.

6. The transformer tightness testing device according to claim 1, wherein an air inlet channel (801) is formed in the inner side of the first valve seat (8), a sealing plug is arranged on the valve cover (10), the sealing plug is inserted into the air inlet channel (801) and is in sliding connection with the air inlet channel, a limit groove is formed in one side, far away from the valve cover (10), of the first valve seat (8), a spring (11) is arranged in the limit groove, the spring (11) is arranged on the sliding rod (9) in a coating mode, and two ends of the spring (11) are respectively in butt joint with the inner wall of the limit groove and a limit plate on the outer side of the sliding rod (9).

7. A transformer tightness testing device according to claim 1, characterized in that a sealing ring (15) is arranged on the lower end surface of the sealing cover (14).

8. A transformer tightness testing device according to claim 1, characterized in that the bottom of the sealing cover (14) is integrally provided with a flexible gasket.