CN210575719U

CN210575719U - Gas density relay

Info

Publication number: CN210575719U
Application number: CN201921389775.7U
Authority: CN
Inventors: 常敏; 王锐; 廖海明; 叶小伟
Original assignee: Shanghai Roye Electric Science and Technology Co Ltd
Current assignee: Shanghai Roye Electric Science and Technology Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-19
Anticipated expiration: 2029-08-26

Abstract

The utility model discloses a gas density relay, which relates to the technical field of electric power, and mainly comprises a density relay body, a multi-way joint, an equipment connecting joint, a valve block and a self-sealing valve; the density relay body is connected with a first interface of the multi-way connector, the equipment connecting connector is connected with a second interface of the multi-way connector, the self-sealing valve is connected with a third interface of the multi-way connector, and the valve block is arranged between the second connector and the self-sealing valve. The utility model discloses the density relay that sets up can be installed in multiple occasion, when carrying out the density relay check-up, need not to install valve formula three way connection additional and just can carry out check-up gas density, not only has save material, practices thrift cost, safety ring, does benefit to the advantage of popularization and application, still has its simple structure, and advantages such as manufacturability is very good can be overcome and are difficult to batch production problem.

Description

Gas density relay

Technical Field

The utility model relates to an electric power tech field especially relates to a gas density relay.

Background

The sulfur hexafluoride gas density relay is used for detecting the change of the sulfur hexafluoride gas density in the sulfur hexafluoride electrical switch, and the performance of the sulfur hexafluoride gas density relay directly influences the reliable and safe operation of the sulfur hexafluoride electrical switch. The sulfur hexafluoride gas density relay installed on the site does not act frequently, and after a period of time, the phenomena of inflexible action or poor contact of contacts often occur, and some sulfur hexafluoride gas density relays can also have poor temperature compensation performance, and are easy to cause misoperation of the sulfur hexafluoride gas density relay when the environmental temperature changes. The test protocol therefore specifies: each sulfur hexafluoride electrical switch usage unit should regularly check the sulfur hexafluoride gas density relay. From the actual operation condition, the regular verification of the sulfur hexafluoride gas density relay on site is one of necessary means for preventing the sulfur hexafluoride gas density relay from being affected in the bud and ensuring the safe and reliable operation of the power equipment. Fig. 1 is a schematic structural diagram of a gas density relay in the prior art, wherein a connector base of the gas density relay adopts a connection form of a check valve, and the check or replacement of the density relay adopting the check valve can only detach a three-way connector base to separate the three-way connector base from a switch body, namely: the check valve and the check valve are separated and then the relay is verified or replaced. Because the check valve is automatically closed on the sulfur hexafluoride electrical switch, no air leakage occurs. However, there is still a risk of air leakage, since there is a risk of damaging the sealing ring during the disassembly process. In addition, in order to cooperate with a density checking relay, a valve type three-way joint density relay is arranged on the market, the problem that the check is not disassembled is solved by additionally arranging the three-way joint, but the field reconstruction is complex, the cost is high, and a certain place has no space for additionally arranging the valve type three-way joint, so that the implementation is difficult. In addition, the existing density relays of similar technologies have high cost and are difficult to popularize and apply in a large scale.

Based on the above problems, how to provide a gas density relay capable of being verified without disassembly is an urgent technical problem to be solved in the field.

Disclosure of Invention

For solving the above technical problem, the utility model provides a gas density relay to realize need not dismantle just can check-up gas density.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a gas density relay, which comprises a density relay body, a multi-way joint, an equipment connecting joint, a valve block and a self-sealing valve;

the density relay body is connected with a first interface of the multi-way joint, the equipment connecting joint is connected with a second interface of the multi-way joint, the self-sealing valve is connected with a third interface of the multi-way joint, and the valve block is arranged between the second joint and the self-sealing valve;

the self-sealing valve comprises a sealing element, a valve core, a spring, a valve core seat and a valve seat; one end of the valve seat is connected with the third interface, the valve core is arranged in the valve seat, and the valve core and the valve block are coaxially arranged; the valve core seat is sleeved on one side of the valve core close to the valve block, the valve core seat is fixedly arranged in the valve seat, the sealing element and the spring are sleeved on the valve core, the spring is positioned on one side close to the valve core seat, and a limiting bulge is arranged on the valve core between the sealing element and the spring; a check port is formed in one side, close to the sealing piece, of the end part of the valve seat; the valve core is connected with the valve block;

the density relay body comprises a shell, a base, a bourdon tube and an end seat, wherein the base is arranged on the inner side wall of the shell, the end seat is arranged at one end inside the shell, one end of the bourdon tube is arranged on the base, and the other end of the bourdon tube is arranged on the end seat; the outer wall of the base is provided with a connecting port, the connecting port penetrates through the shell, and the connecting port is connected with the first interface;

or, the density relay body comprises a shell, a base, a connecting piece, a bourdon tube and an end seat, wherein the base is arranged on the inner side wall or the bottom of the shell, the end seat is arranged at one end inside the shell, one end of the bourdon tube is arranged on the base, and the other end of the bourdon tube is arranged on the end seat; the connecting piece is a hollow pipe fitting, one end of the connecting piece is fixedly connected with the base, and the other end of the connecting piece penetrates through the shell to be connected with the first interface;

or, the density relay body comprises a shell, a base, a connecting piece, a bourdon tube and an end seat, wherein the base is arranged on the inner side wall or the bottom of the shell, the end seat is arranged at one end inside the shell, one end of the bourdon tube is arranged on the base, and the other end of the bourdon tube is arranged on the end seat; the connecting piece is a hollow pipe fitting, one end of the connecting piece is communicated with the inside of the shell, and the other end of the connecting piece is connected with the first interface.

Optionally, a relay air duct is arranged inside the first interface, and the relay air duct is communicated with two ends of the first interface.

Optionally, a switchgear air duct is arranged inside the second interface, and the switchgear air duct communicates with two ends of the second interface.

Optionally, a first connection pipe is arranged between the device connection joint and the second interface of the multi-way joint.

Optionally, the first connection pipe, the multi-way joint and the equipment connection joint are of an integrated structure.

Optionally, the plugging piece is a rubber ring or a rubber pad, and the plugging piece is arranged on the check port.

Optionally, the valve seat and the valve core seat are of an integrated structure.

Optionally, the check port is a self-locking joint.

Optionally, a blocking piece is arranged at the check port.

The utility model discloses for prior art gain following technological effect:

the density relay is basically the same as a common density relay in size, can be installed in various occasions, can check the gas density without additionally installing a valve type three-way joint during the check of the density relay, has the advantages of material saving, cost saving, safety, environmental protection and contribution to popularization and application, has the advantages of simple structure, very good manufacturability and the like, and can overcome the problem that the prior art is difficult to produce in batches.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the gas density relay of the present invention;

fig. 2 is a schematic cross-sectional view of the gas density relay of the present invention;

fig. 3 is a schematic structural diagram of another embodiment of the gas density relay according to the present invention.

Description of reference numerals: 1. a density relay body; 101. a connecting member; 102. a housing; 103. a bourdon tube; 104. a compensation element; 105. a movement; 106. a pointer; 107. a base; 108. sitting up; 109. an electrical contact; 2. a multi-way joint; 21. a first interface; 22. a second interface; 23. a third interface; 24. a nut; 201. a relay air duct; 202. a switchgear airway; 3. a first connecting pipe; 4. a device connection joint; 5. a self-sealing valve; 501. a seal member; 502. a valve core; 503. a spring; 504 a valve core seat; 505. a valve seat; 6. a valve block; 7. a blocking member; 8. checking the port; 9. prevent losing the connecting piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The first embodiment is as follows:

as shown in fig. 1-2, the present embodiment provides a gas density relay, which includes a density relay body 1, a multi-way connector 2, an equipment connection connector 4, a valve block 6, and a self-sealing valve 5.

The density relay body 1 is connected with a first interface 21 of the multi-way connector 2, the equipment connecting connector 4 is connected with a second interface 22 of the multi-way connector 2, the self-sealing valve 5 is connected with a third interface 23 of the multi-way connector 2, and the valve block 6 is arranged between the second connector and the self-sealing valve 5.

The self-sealing valve 5 comprises a sealing member 501, a valve core 502, a spring 503, a valve core seat 504 and a valve seat 505; one end of the valve seat 505 is connected to the third port 23, the valve element 502 is disposed in the valve seat 505, and the valve element 502 and the valve block 6 are coaxially disposed; the valve core seat 504 is movably sleeved on one side of the valve core 502 close to the valve block 6, the valve core seat 504 is fixedly arranged in the valve seat 505, the sealing element 501 and the spring 503 are both sleeved on the valve core 502, the spring 503 is arranged on one side close to the valve core seat 504, and a limiting protrusion is arranged on the valve core 502 between the sealing element 501 and the spring 503; a check port 8 is arranged at one side of the end part of the valve seat 505 close to the sealing member 501, and the check port 8 can be a self-locking joint; the checking port 8 is provided with a plugging piece 7 for strengthening sealing and preventing gas from leaking outside. The valve core 502 is connected to the valve block 6.

The density relay body 1 comprises a shell 102, a base 107, a bourdon tube 103 and an end seat, wherein the base 107 is arranged on the inner side wall of the shell 102, the end seat is arranged at one end inside the shell 102, one end of the bourdon tube 103 is arranged on the base 107, and the other end of the bourdon tube 103 is arranged on the end seat; the outer wall of the base 107 is provided with a connection port, the connection port penetrates through the housing 102, and the connection port is connected with the first port 21.

The first interface 21 is internally provided with a relay air duct 201, and the relay air duct 201 is communicated with two ends of the first interface 21. A switchgear air duct 202 is disposed inside the second port 22, and the switchgear air duct 202 communicates with two ends of the second port 22. A first connecting pipe 3 is arranged between the device connecting joint 4 and the second interface 22 of the multi-way joint 2. The first connecting pipe 3, the multi-way joint 2 and the equipment connecting joint 4 are of an integrated structure. The plugging piece 7 is provided with an O-shaped sealing ring. The valve seat 505 and the valve core seat 504 may be designed as a one-piece structure. The valve core 502 in this embodiment is made of a metal material or a hard non-metal material, for example, a metal material such as copper, stainless steel, aluminum, steel, or a hard non-metal material such as an epoxy rod or a high-density non-metal material.

When the gas density relay in this embodiment normally works, the density relay body 1, the first interface 21, the relay air duct 201, the switchgear air duct 202, the second interface 22, the first connecting pipe 3, and the equipment connecting joint 4 are mutually communicated on an air path.

When the gas density relay in this embodiment is used for checking, the checking transition joint, the relay air duct 201, the first interface 21 and the density relay body 1 are communicated on the air path.

When the gas density relay in this embodiment is used for supplying gas or testing micro water, the density relay body 1, the first interface 21, the relay air duct 201, the gas supply or testing micro water transition joint, the switchgear air duct 202, the second interface 22, the first connecting pipe 3, and the equipment connecting joint 4 are mutually communicated on the gas path.

The gas density relay in this embodiment is when the check-up, dismantle behind the shutoff piece 7, insert the check-up transition joint in check-up mouth 8, there is an inner tube (or the plug-in components that have the air vent) to insert from sealing valve 5 and promote valve core 502 from check-up mouth 8 in the check-up transition joint, valve core 502 pushes away valve block 6, seal switchgear air duct 202 by valve block 6, at this moment, check-up transition joint and relay air duct 201, density relay body 1 communicates each other, thereby realize need not dismantle the density relay and just can check up the density relay.

The valve block 6 is a block, and the valve block 6 can be connected with the valve core 502 by means of bonding or sleeving. One end of the valve block 6 close to the ventilation channel 202 of the switch device is provided with a sealing element which can be a rubber sealing gasket or a red copper gasket, and the valve block 6 can be made of materials which are easy to seal, such as rubber, polytetrafluoroethylene, a red copper gasket and the like.

After the verification is finished, the verification transition joint is slowly withdrawn, the valve core 502 and the sealing element 501 reset under the pushing of the spring 503, the verification port 8 is plugged from the interior of the valve seat 505, and the verification port 8 is plugged from the exterior by using the plugging piece 7; the switchgear air duct 202 is opened again, so that the equipment connecting joint 4, the first connecting pipe 3, the switchgear air duct 202, the relay air duct 201 and the relay body are communicated again, and the gas density relay is restored to a normal working state.

When the electric equipment leaks air and the gas density value is reduced to an alarm or locking value, and the difference between the density value of sulfur hexafluoride gas in the electric equipment and the density value of sulfur hexafluoride gas set by the density relay is within a first set value range, namely the difference between the density value of sulfur hexafluoride gas in the electric equipment and the set density value of sulfur hexafluoride gas is within a second set value range, the contact of the density relay is connected and sends out a corresponding alarm or locking signal, so that the density of sulfur hexafluoride gas in the electric switch equipment is controlled and monitored, and the electric equipment can work safely.

The electrical contacts 109 in this embodiment may be micro-switches or magnetically assisted electrical contacts 109; the pressure detecting element may be a bourdon tube 103 or a bellows tube, or a composite of the bourdon tube 103 and the bellows tube. The gas density relay body 1 comprises a mechanical density relay, which mainly comprises a bourdon tube 103 or a corrugated tube, a temperature compensation element and a signal generator, or an electronic density relay, which mainly comprises a pressure sensor, a temperature sensor and a signal generator (namely an electric control relay).

Example two:

as shown in fig. 3, the density relay body 1 in this embodiment includes a housing 102, a base 107, a connecting member 101, a bourdon tube 103, and an end seat, wherein the base 107 is disposed on an inner side wall or a bottom of the housing 102, the end seat is disposed at one end inside the housing 102, one end of the bourdon tube 103 is disposed on the base 107, and the other end is disposed on the end seat; the connecting member 101 is a hollow pipe, one end of the connecting member 101 is fixedly connected to the base 107, and the other end of the connecting member passes through the housing 102 and is connected to the first port 21.

Example three:

the density relay body 1 in this embodiment includes a housing 102, a base 107, a connecting member 101, a bourdon tube 103, and an end seat, where the base 107 is disposed on an inner side wall of the housing 102, the end seat is disposed at one end inside the housing 102, one end of the bourdon tube 103 is disposed on the base 107, and the other end is disposed on the end seat; the connecting piece 101 is a hollow pipe, one end of the connecting piece 101 is communicated with the inside of the shell 102, and the other end of the connecting piece 101 is connected with the first interface 21.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. A gas density relay is characterized by comprising a density relay body, a multi-way joint, an equipment connecting joint, a valve block and a self-sealing valve;

the density relay body is connected with a first interface of the multi-way joint, the equipment connecting joint is connected with a second interface of the multi-way joint, the self-sealing valve is connected with a third interface of the multi-way joint, and the valve block is arranged between the second interface and the self-sealing valve;

2. The gas density relay according to claim 1, wherein a relay vent is provided inside the first port, and the relay vent communicates with both ends of the first port.

3. The gas density relay according to claim 1, wherein a switchgear air passage is provided inside the second port, and the switchgear air passage communicates with both ends of the second port.

4. The gas density relay according to claim 1, wherein a first connection tube is provided between the device connection terminal and the second port of the multi-way terminal.

5. The gas density relay of claim 4, wherein the first connection tube, the multi-way junction, and the equipment connection junction are of a unitary construction.

6. The gas density relay of claim 1, wherein the valve seat is a unitary structure with the valve cartridge seat.

7. The gas density relay of claim 1, wherein the check port is a latching tab.

8. The gas density relay of claim 1, wherein a block piece is provided at the check port.

9. The gas density relay of claim 8, wherein the blocking piece is a rubber ring or a rubber pad.