CN210775112U

CN210775112U - Gas density monitor free of disassembly during verification

Info

Publication number: CN210775112U
Application number: CN201921448488.9U
Authority: CN
Inventors: 苏丽芳
Original assignee: Shanghai Zhuodian Electric Co ltd
Current assignee: Shanghai Zhuodian Electric Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-16
Anticipated expiration: 2029-09-03

Abstract

The utility model discloses a disassembly-free gas density monitor during calibration, which comprises a density monitor body, a base, a pressure detector, a temperature compensation element, a calibration interface, a valve and an equipment connecting joint, wherein the base is arranged on the density monitor body; one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the pressure detector; the pressure detector is communicated with the check interface. The utility model provides an exempt from gas density monitor of dismantling during calibration has following advantage: the valve joint is basically the same as a common density monitor, can be installed in any occasion, and thoroughly solves the problems that the valve joint is large in volume and cannot be installed in many places; the valve type three-way joint can be omitted, so that the material is greatly saved, the environment-friendly value is high, the cost is saved, and the popularization and the application are facilitated; the sealing performance is good, and factor of safety is high, simple structure, small.

Description

Gas density monitor free of disassembly during verification

Technical Field

The utility model relates to an electric power tech field especially relates to an exempt from gas density monitor of dismantling during calibration.

Background

Sulfur hexafluoride (SF)₆) The gas density monitor (including density meter and pressure meter) is used for detecting hexafluoro-formation in sulfur hexafluoride electric switchThe performance of sulfur hexafluoride electrical switches is directly affected by the change of sulfur gas density. The sulfur hexafluoride gas density monitor 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 monitors can also have poor temperature compensation performance, so that the sulfur hexafluoride gas density monitors are easy to malfunction 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 monitor. From the actual operation condition, the regular verification of the sulfur hexafluoride gas density monitor on site is one of necessary means for preventing the sulfur hexafluoride gas density monitor 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 monitor of the prior art, in which a joint seat of the gas density monitor of the prior art is in a connection form of a check valve during field verification. Currently, to verify or replace a density monitor of this type of connection, it is only possible to remove the three-way coupling socket and disengage it from the switch body, i.e.: the check valve and check valve are separated and the calibration or replacement of the monitor is then started. Because the check valve is an automatically closed check valve on the sulfur hexafluoride electrical switch, air leakage is avoided. 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 check density monitor, a valve type density monitor three-way joint is arranged on the market, the problem that the check is not disassembled is solved by additionally arranging the product, but the field reconstruction is complex, the cost is high, and the valve type density monitor three-way joint is not arranged in any place and cannot be implemented easily. In addition, the existing density monitor of the similar technology has high cost and is difficult to popularize and apply in a large quantity.

In order to solve the above problems, there is a need for improvement and innovation of a gas density monitor that can be verified without disassembly, and that can provide security for the grid and convenience for the power workers.

SUMMERY OF THE UTILITY MODEL

In view of prior art's above-mentioned defect, the utility model discloses an one end and the equipment attach fitting of valve are linked together, and the other end and the pressure detector of valve are linked together, and the mode that pressure detector and check-up interface are linked together for the gas density monitor need not dismantle when carrying out the check-up and break away from the gas density monitor, and need not to install tee bend valve joint additional.

In order to achieve the purpose, the utility model provides a gas density monitor free of disassembly during calibration, which comprises a density monitor body, a base, a pressure detector, a temperature compensation element, a calibration interface, a valve and an equipment connecting joint; the base is arranged on the density monitor body; one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the pressure detector; the pressure detector is communicated with the check interface.

Further, the check interface and the valve are arranged on the base.

Further, still include the second connecting piece, check-up interface, valve set up in the second connecting piece.

Further, still include the casing, check-up interface, valve set up in on the casing or in the casing.

Further, the housing is a sealing structure.

Further, the pressure detector is a bourdon tube, a bellows, or a pressure sensor.

Further, the density monitor body is a mechanical, electronic, or hybrid mechanical and electronic density monitor.

Further, the valve and the check interface are of an integrated structure.

Further, the valve is a cut-off valve or a check valve, and the cut-off valve includes but is not limited to one of a ball valve, a butterfly valve, a gate valve, a stop valve, a plug valve, a butterfly valve, a needle valve and a diaphragm valve.

Furthermore, a cut-off sealing element is arranged on a cut-off valve core of the cut-off valve, and the cut-off sealing element is a rubber ring, a rubber pad, polytetrafluoroethylene or a rubber element vulcanized on the cut-off valve core.

Further, the verification interface is disposed inside, on a side, on a front side, or behind a bottom of the density monitor body.

Further, the density monitor further comprises a display mechanism, wherein the display mechanism is a mechanical display mechanism or an electronic display mechanism; the mechanical display mechanism comprises a movement, a pointer and a dial; the electronic display mechanism comprises a nixie tube or liquid crystal.

Further, the verification interface and the base are parallel or perpendicular to each other.

Further, the device also comprises a plugging piece and an anti-lost connecting piece, wherein the plugging piece is arranged at the check interface; one end of the anti-lost connecting piece is arranged on the plugging piece, and the other end of the anti-lost connecting piece is arranged on the valve, the check interface, the density monitor body or the equipment connecting joint.

Further, the gas sensor also comprises at least one sensor connecting port, and the sensor connecting port is used for connecting a gas density sensor, a gas micro-water sensor or a gas decomposition product sensor.

The utility model discloses the technical effect who realizes does:

1. the appearance of the density monitor of the utility model is basically the same as that of the common density monitor, and the density monitor can be installed in any occasions, thereby thoroughly overcoming the problems that the three-way valve joint has large volume and can not be installed in a plurality of places;

2. by adopting the density monitor of the utility model, the weight is obviously reduced, the whole shock strength is greatly improved by matching with a bent pipe structure, and the test can reach 40 g;

3. the production structure is simple, the original complex air guide part is deleted, the production difficulty is reduced through structural optimization, and the overall structure is simpler and more reliable;

4. the production manufacturability is improved, so that each production link is simpler, the test mode in the production link is simplified, and the requirements on gas sealing detection in each detailed flow can be accurately controlled;

5. the utility model discloses a density monitor sealing performance is good, and factor of safety is high, simple structure, and is small.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

FIG. 1 is a schematic structural view of a density monitor body;

fig. 2 is a schematic structural diagram of a gas density monitor that is free from disassembly during verification according to a first embodiment of the present invention;

fig. 3 is a schematic structural diagram of a gas density monitor that is free from disassembly during verification according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a gas density monitor that is free from disassembly during verification according to a third embodiment of the present invention;

fig. 5 is a schematic structural diagram of a gas density monitor according to a fourth embodiment of the present invention, which is not disassembled during verification.

Reference numerals: 1-density monitor body, 101-base, 102-shell, 103-pressure detector, 104-temperature compensation element, 105-movement, 106-pointer, 107-dial, 109-signal generator, 2-multi-way joint, 3-first connecting pipe, 4-equipment connecting joint, 5-check interface, 501-sealing element, 502-valve core, 503-spring, 504-valve core seat, 505-valve seat, 6-valve, 7-blocking element, 801-first connecting element, 802-second connecting element, 9-anti-lost connecting element, 10-second connecting pipe, 21-switching equipment vent channel and 22-monitor vent channel.

Detailed Description

Example one

As shown in fig. 2, the utility model provides a gas density monitor free of disassembly during calibration, which comprises a density monitor body 1, a base 101, a shell 102, a first connecting pipe 3, an equipment connecting joint 4, a calibration interface 5, a valve 6, a plugging member 7, a first connecting member 801, a second connecting member 802 and an anti-lost connecting member 9; the verification interface 5 includes a seal 501, a spool 502, a spring 503, a spool seat 504, and a valve seat 505.

As shown in fig. 1, the density monitor body 1 includes a base 101, a case 102, and a temperature compensation element 104, a pressure detector 103, a movement 105, a pointer 106, a dial 107, and a signal generator 109 provided in the case 102. The density monitor body 1 is connected with the equipment connecting joint 4 through the first connecting pipe 3, the verification interface 5 is arranged on the shell 102 of the density monitor body 1, the base 101 is connected with the verification interface 5 through the second connecting piece 802, the first connecting piece 801 is communicated with the equipment connecting joint 4 on an air path, and the second connecting piece 802 is communicated with the pressure detector 103. The base 101 is welded or fixed to the housing 102, and one end of the pressure detector 103 is welded to the base 101, and the other end is connected to the temperature compensation element 104 through a welding end seat. The gas density is monitored by the action of the pressure detector 103 and the temperature compensation element 104, and the gas density value is displayed by the movement 105, the pointer 106 and the dial 107. The density monitor body 1 can be used to monitor the gas density of an electrical device.

The valve seat 505 is disposed on the housing 102 of the density monitor body 1, the valve core seat 504 is disposed in the valve seat 505, the spring 503 is disposed outside or inside the valve core 502, one end of the spring 503 is disposed on the valve core seat 504, the other end of the spring 503 is disposed on the valve core 502, the sealing member 501 is disposed on the valve core 502, the valve core 502 passes through a through hole of the valve core seat 504 to be connected with the valve 6, and the valve 6 is disposed corresponding to the first connecting member 801 and the switchgear vent passage 21.

The equipment connecting joint 4, the first connecting pipe 3, the first connecting piece 801 and the switchgear air duct 21 are communicated on an air path. The device connection nipple 4, the first connection tube 3 can be of integral design.

The pressure detector 103, the second connector 802, and the monitor air duct 22 of the density monitor body 1 are in air-path communication.

In normal operation, the pressure detector 103, the second connector 802, the monitor air passage 22, the switchgear air passage 21, the first connector 801, the first connector 3, and the equipment connector 4 of the density monitor body 1 are communicated with each other in the air passage.

During verification, the verification transition joint, the monitor air passage 22, the second connecting piece 802 and the pressure detector 103 are communicated in an air passage.

When air is supplied or micro water is tested, the pressure detector 103, the second connecting piece 802, the monitor air duct 22, the air supply or test micro water transition joint, the switchgear air duct 21, the first connecting piece 801, the first connecting pipe 3 and the equipment connecting joint 4 of the density monitor body 1 are communicated with each other on the air path.

In this embodiment, after the plugging member 7 is removed, the verification transition joint is inserted into the verification interface 5, and the verification transition joint has an inner tube (or an insert with a vent hole) inserted into the inner cavity from the end of the verification interface 5 to align with the valve element 502, so as to push the valve element 502 of the verification interface 5 to move forward by a set distance, and further push the valve 6 to move forward by a set distance because the valve element 502 of the verification interface 5 is connected with the valve 6. When the valve 6 reaches a set distance, the valve 6 blocks the switch equipment air duct 21, and the verification transition joint is communicated with the monitor air duct 22 and the pressure detector 103 of the density monitor body 1, so that the density monitor can be verified without disassembling the density monitor. And after the verification is finished, the verification transition joint is slowly withdrawn, the spring 503 pushes the sealing element 501 to restore, meanwhile, the valve core 502 drives the valve 6 to restore, the switch equipment air duct 21 is opened, and the equipment connecting joint 4, the first connecting pipe 3, the switch equipment air duct 21, the first connecting piece 801, the monitor air duct 22, the second connecting piece 802 and the pressure detector 103 of the monitor body 1 are ensured to be communicated. And slowly withdrawing the checking transition joint until the checking interface 5 is restored to the original position, dismounting the checking transition joint, and then installing the plugging piece 7 on the checking interface 5 to restore the gas density monitor to the normal working state. In the embodiment, the calibration transition joint is utilized, the end part of the calibration interface 5 is operated, and then the valve 6 is driven to control the opening and the plugging of the air passage 21 of the switch device, so that the function of calibrating the gas density monitor without disassembling the gas density monitor on site is realized.

This embodiment can also utilize the check-up transition joint, through straight line and/or rotary motion operation check-up interface 5, and then drive 6 control switchgear air duct 21 of valve and open and the shutoff.

In this embodiment, the calibration interface 5 can be directly operated by linear and/or rotational movement, so as to drive the operation valve 6 to control the opening and closing of the ventilation channel 21 of the switchgear, which is not illustrated herein by way of example.

When the electrical equipment leaks gas and the gas density value is reduced to an alarm or locking value, and the difference between the gas density value (sulfur hexafluoride) in the electrical equipment and the set sulfur hexafluoride gas density value of the density monitor is within a first set value range, namely the difference between the gas density value of the sulfur hexafluoride in the electrical equipment and the set sulfur hexafluoride gas density value is within a second set value range, the contact of the density monitor is connected and sends out a corresponding alarm or locking signal, so that the control and monitoring of the sulfur hexafluoride gas density in the electrical switching equipment are realized, and the electrical equipment can work safely.

The signal generator 109 in this embodiment can be a microswitch or a magnetically assisted electrical contact; the pressure detector 103 may be a bourdon tube or bellows or a pressure sensor, or a bourdon tube and bellows composite. The gas density monitor body is a mechanical density monitor or an electronic density monitor; the mechanical density monitor mainly comprises a bourdon tube or a corrugated tube, a temperature compensation element and a signal generator, and the electronic density monitor mainly comprises a pressure sensor, a temperature sensor and a signal generator (namely an electronic control monitor).

The gas density monitor in the present embodiment further includes: and the plugging piece 7 is arranged on the verification interface 5 and used for strengthening sealing, preventing gas from leaking outwards and preventing dust from entering the verification interface 5. Still set up simultaneously and prevented losing connecting piece 9, the one end of preventing losing connecting piece 9 sets up in shutoff piece 7, and the other end sets up in check-up interface 5, density monitor body 1, lead to joint 2 or equipment attach fitting 4 more. When the plugging piece 7 is disassembled, the plugging piece 7 can rotate freely, and the disassembly or the assembly is convenient.

The gas density monitor in the embodiment further comprises a self-locking connecting mechanism which is arranged on the checking interface 5 and used for ensuring the correctness of checking and ensuring the safety and reliability of the checking process. Specifically, when the calibration is finished, the self-locking connecting mechanism can be opened only after the valve 6 is restored to the original position, and then the calibration joint is detached, so that gas leakage is prevented.

The density monitor of the present embodiment further includes: the sensor interfaces are respectively connected with at least one of a gas density sensor with a gas density transmitter, a gas micro-water sensor with a gas micro-water transmitter and a gas decomposer sensor, the gas density sensor with the gas density transmitter is used for online monitoring of density, the gas micro-water sensor with the gas micro-water transmitter is used for online monitoring of micro-water, and the gas decomposer sensor is used for online monitoring of decomposers; the sensor interface can also be connected to other sensors, not to mention here. The density monitor of the present embodiment includes a density meter, a density switch, and a density monitor of an electrical contact. The density monitor of the present embodiment includes mechanical, electronic, or a combination of mechanical and electronic.

The calibration interface in this embodiment can be used for calibrating, supplementing air and testing micro water.

The valve 6 in this embodiment is used to control the opening and closing of the gas passage of the switchgear.

The seal 501 in the verification interface 5 of the present embodiment is used for sealing, so as to prevent gas leakage or external air inflow; the valve core 502 is used for connecting the valve 6 and the sealing member 501; the spring 503 is used for pushing the sealing element 501 to restore the verification interface 5 to the original position, so as to play a role of sealing gas; the valve core seat 504 is used for fixing the check interface 5 and the spring 503.

The housing 102 of the density monitor body 1 in this embodiment is connected to the verification interface 5 by a seal ring or a weld seal. The housing 102 of the density monitor body 1 in this embodiment is totally sealed, so that the density monitor is not affected by the atmospheric pressure of the altitude.

The diameter of the valve 6 in this embodiment is greater than or equal to the diameter of the switchgear duct 21, for completely closing off the switchgear duct 21 during verification.

The valve 6 in this embodiment can be an integral structure; the valve can also be composed of a valve rod and a valve body; the valve rod is connected with the valve core, the valve rod can be driven by operating the valve core, and the valve body is mainly used for sealing and controlling the opening and the plugging of a ventilation path of the switch equipment.

In the embodiment, a plurality of plugging sealing elements are arranged between the plugging piece 7 and the verification interface 5, so as to improve the air tightness between the plugging piece 7 and the verification interface 5; the plugging sealing element is any one of a rubber ring, a rubber pad or an O-shaped ring.

The valve 6 in the present embodiment includes, but is not limited to, a shut-off valve, a check valve; shut-off valves include, but are not limited to, ball valves, butterfly valves, gate valves, globe valves, plug valves, needle valves, valve blocks, diaphragm valves. The cut-off sealing element is arranged on the cut-off valve core of the cut-off valve, so that the reliability of the cut-off valve is improved.

The verification interface 5 of the present embodiment can be disposed below the density monitor main body 1, and can also be disposed above, to the left, and to the right, and in short, the positions, angles, and directions at which the verification interface 5 and the density monitor main body 1 of the present embodiment are disposed with respect to the device connection tabs 4 are various. The position of the verification interface 5 can be arbitrarily set around the density monitor body 1.

Example two

As shown in fig. 3, the density monitor body 1 includes a base 101, a pressure detector 103, and a temperature compensation element 104. The density monitor body 1 is connected with the equipment connecting joint 4 through the first connecting pipe 3, the checking interface 5 is arranged on the base 101 of the density monitor body 1, and the monitor air duct 22 and the switchgear air duct 21 are arranged on the base 101. The verification interface 5 protrudes from the housing 102. In the normal operation of this embodiment, the pressure detector 103, the monitor air passage 22, the switchgear air passage 21, the first connection pipe 3, and the equipment connection joint 4 of the density monitor body 1 communicate with each other in the air passage. During verification, the verification transition joint, the monitor air passage 22 and the pressure detector 103 are communicated on the air passage.

The valve seat 505 is hermetically connected with the shell 102 to form an absolute pressure type density relay; it is also possible to make a relative pressure type density relay (a type of monitor) without sealing the connection. The position of the verification interface 5 in this embodiment can also be arbitrarily set around the density monitor body 1.

The rest of the process is the same as the first embodiment, and will not be described herein.

EXAMPLE III

As shown in fig. 4, the density monitor body 1 includes a base 101, a pressure detector 103, and a temperature compensation element 104. The density monitor body 1 is connected to the equipment connection joint 4 through the first connection pipe 3, the calibration interface 5 is provided in the housing 102 of the density monitor body 1, and the density monitor body 1 is provided with a monitor air duct 22 and a switchgear air duct 21. In the normal operation of this embodiment, the pressure detector 103, the monitor air passage 22, the switchgear air passage 21, the first connection pipe 3, and the equipment connection joint 4 are communicated with each other in the air path.

During the verification of the embodiment, the verification transition joint, the monitor air duct 22 and the pressure detector 103 are communicated on the air path, and the valve 6 closes the switchgear air duct 21. The verification interface 5 is oriented parallel to the density monitor housing 102. The calibration interface 5 may be provided on the base 101 of the density monitor main body 1, and the base 101 may be provided with the monitor air duct 22 and the switchgear air duct 21. The verification interface 5 protrudes from the housing 102.

Example four

As shown in fig. 5, the density monitor body 1 includes a base 101, a pressure detector 103, and a temperature compensation element 104. The density monitor body 1 is connected with the equipment connecting joint 4 through the multi-way joint 2 and the first connecting pipe 3, the checking interface 5 is arranged on the multi-way joint 2, and the multi-way joint 2 is provided with a monitor air channel 22 and a switchgear air channel 21. In the normal operation of this embodiment, the pressure detector 103, the monitor air passage 22, the switchgear air passage 21, the first connection pipe 3, and the equipment connection joint 4 of the density monitor body 1 communicate with each other in the air passage. During verification, the verification transition joint, the monitor air passage 22 and the pressure detector 103 are communicated on the air passage.

The multi-way joint 2, the first connecting pipe 3 and the equipment connecting joint 4 in the embodiment can be arranged in a split manner, and can also be arranged in an integrated structure; the integral structure improves the air tightness of the connection of all devices; the components of a whole that can function independently set up the later stage of being convenient for are dismantled, can change the density monitor body. The monitor body 1 can be connected to the multi-way joint 2 by a second connection pipe 10.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A gas density monitor free of disassembly during verification comprises a density monitor body, a base, a pressure detector, a temperature compensation element, a verification interface, a valve and an equipment connecting joint, and is characterized in that the base is arranged on the density monitor body; one end of the valve is communicated with the equipment connecting joint, and the other end of the valve is communicated with the pressure detector; the pressure detector is communicated with the check interface.

2. The non-disassembly gas density monitor during verification of claim 1, wherein the verification interface and the valve are disposed on the base.

3. The monitor of claim 1, further comprising a second connector, wherein the calibration interface and the valve are disposed on the second connector.

4. The non-disassembly gas density monitor during verification of claim 1, further comprising a housing, wherein the verification interface, the valve are disposed on or in the housing.

5. The non-disassembly gas density monitor during verification of claim 4, wherein the housing is a sealed structure.

6. The non-disassembly during verification gas density monitor of claim 1, wherein the pressure detector is a bourdon tube, a bellows, or a pressure sensor.

7. The non-disassembly gas density monitor during verification of claim 1, wherein the density monitor body is a mechanical, electronic or hybrid mechanical and electronic density monitor.

8. The non-disassembly gas density monitor during verification of claim 7, wherein the valve is integral with the verification interface.

9. The gas density monitor as claimed in claim 1, wherein the valve is a cut-off valve or a check valve, the cut-off valve including but not limited to one of a ball valve, a butterfly valve, a gate valve, a stop valve, a plug valve, a needle valve, and a diaphragm valve.

10. The gas density monitor free of disassembly during calibration of claim 9, wherein the shut-off valve spool is provided with a shut-off seal, and the shut-off seal is a rubber ring, a rubber pad, teflon or a rubber member vulcanized on the shut-off valve spool.

11. The non-disassembly upon verification gas density monitor of claim 1, wherein the verification interface is disposed within, at a side, at a front, or at a bottom rear of the density monitor body.

12. The gas density monitor free of disassembly during verification of claim 1, further comprising a display mechanism, wherein the display mechanism is a mechanical display mechanism or an electronic display mechanism.

13. The non-disassembly gas density monitor during verification of claim 1, wherein the verification interface and the base are parallel or perpendicular to each other.

14. The monitor of claim 1, further comprising a blocking member and an anti-lost connector, wherein the blocking member is disposed at the calibration interface; one end of the anti-lost connecting piece is arranged on the plugging piece, and the other end of the anti-lost connecting piece is arranged on the valve, the check interface, the density monitor body or the equipment connecting joint.

15. The monitor of claim 1-14, further comprising at least one sensor connector for connecting a gas density sensor, a gas micro-water sensor or a gas decomposition sensor.