CN211927604U - Disassembly-free check and inflation-free sulfur hexafluoride low-pressure density controller - Google Patents
Disassembly-free check and inflation-free sulfur hexafluoride low-pressure density controller Download PDFInfo
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- CN211927604U CN211927604U CN202020486896.XU CN202020486896U CN211927604U CN 211927604 U CN211927604 U CN 211927604U CN 202020486896 U CN202020486896 U CN 202020486896U CN 211927604 U CN211927604 U CN 211927604U
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Abstract
The utility model discloses an exempt from to dismantle check-up, inflatable sulfur hexafluoride low pressure density controller, including low barometer, check-up seat, check-up check valve of inflating, the first end welding of check-up seat of inflating has the joint, connect through first sealing washer and first nut and low barometer fixed connection, the second end welding has body fixed joint, body fixed joint passes through second sealing washer and coupling nut and gas appliances evenAnd the third end is connected with a check valve. The utility model discloses not only can accurate demonstration by SF in the monitoring switch cabinet6The density of the gas can send alarm and locking signals to the background when the gas leaks; moreover, the SF6 low-pressure gauge can be verified without being disassembled6And the equipment is inflated on the premise of a low-pressure gauge.
Description
Technical Field
The utility model belongs to the technical field of power equipment, concretely relates to exempt from to dismantle check-up, gas filled sulfur hexafluoride low pressure density controller.
Background
SF6The low-pressure gauge is used for monitoring SF in low-pressure equipment such as a switch cabinet, a ring main unit and the like6The performance of the gas density meter directly influences whether the equipment can run safely. Insulating gases of ring main unit below 10kV in power supply system are all SF6Gas, therefore, in use to SF6Gas density monitoring in the switch body is of critical importance. During manufacturing, the ring main unit is required to be filled with SF with rated pressure6Gas, however, the ring main unit is only left with assembly SF due to cost pressure6The interface of the low-pressure gauge, through which the gas charge must also pass, is filled with gas and then fitted with SF6Low barometer, therefore, filled with SF of the ring main unit6The gas pressure error will be large. When SF in the ring main unit6When gas leaks, the equipment must be supplemented with gas, and when gas is supplemented, SF must be detached6Low gas pressure gauge from fitting SF6The interface of low barometer is aerifyd, and not only troublesome like this, and the error is very big moreover, and what be more, owing to dismantle the installation, still cause equipment gas leakage easily. When for SF6When the low pressure gauge is checked, the equipment must stop running, and the SF is used6The low barometer is arranged in a professional laboratory after being disassembled and can be verified. Not only the efficiency is low, but also the normal production is seriously delayed.
SUMMERY OF THE UTILITY MODEL
In view of this, the main objective of the present invention is to provide a sulfur hexafluoride low pressure density controller without disassembly for calibration and inflation.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
the embodiment of the utility model provides an exempt from to dismantle check-up, inflatable sulfur hexafluoride low pressure density controller, including low barometer, check-up seat, check-up check valve of inflating, the first end welding of check-up seat of inflating has the joint, connect through first sealing washer and first nut and low barometer fixed connection, the welding of second end has body fixed joint, body fixed joint passes through the second sealing washer and coupling nut and is connected with gas equipment, and the third end is connected with the check valve.
In the above scheme, the check inflation seat comprises a seat body, a first connecting pipe and a second connecting pipe, wherein a first vent hole communicated with the second connecting pipe is formed in one side of the seat body close to the low barometer, and the first vent hole is communicated with the joint; one side of the seat body, which is close to the body fixed joint, is connected with one end of a first connecting pipe, a second vent hole of the first connecting pipe is communicated with the first connecting pipe, and the other end of the first connecting pipe is communicated with the body fixed joint; any one side face of the upper side and the lower side of the seat body is connected with one end of a second connecting pipe, and the other end of the second connecting pipe is in non-return connection with the other end of the second connecting pipe.
In the above scheme, a third vent hole and a fourth vent hole are coaxially arranged in the second connecting pipe, the third vent hole is communicated with the second vent hole of the first connecting pipe, and the fourth vent hole is communicated with the first vent hole; and the communication state of the third vent hole and the fourth vent hole is controlled by the check valve.
In the above scheme, the other end of second connecting pipe is eccentric to be provided with the U type and connects, the U type connects and the check valve passes through the third sealing washer to be connected.
In the above scheme, a closed surface boss communicated with the third vent hole is arranged in the U-shaped joint, and the communicated state of the third vent hole and the fourth vent hole is controlled through the matching of the side surface, close to the check valve, of the closed surface boss and the check valve.
In the above scheme, the check valve comprises a valve body, a push rod sleeve, a push rod, a spring, an o-shaped sealing ring and an extension push rod, wherein the push rod is arranged in the valve body in a penetrating manner, the spring and the push rod sleeve are sleeved on one side of the push rod, and the other end of the push rod is connected with the inside of the valve body in a sealing manner through the sleeved o-shaped sealing ring; and an extension ejector rod is arranged at one end of the ejector rod close to the U-shaped joint.
In the scheme, one end of the extension ejector rod, which is close to the U-shaped joint, is provided with a bulge matched with the closed surface boss; a fourth sealing ring is sleeved outside the protrusion.
In the above scheme, the check valve is provided with a fifth sealing ring and a protective cap.
Compared with the prior art, the utility model discloses not only can accurate display by SF in the monitored switch cabinet6The density of the gas can send alarm and locking signals to the background when the gas leaks; moreover, the SF6 low-pressure gauge can be verified without being disassembled6And the equipment is inflated on the premise of a low-pressure gauge.
Drawings
Fig. 1 is a schematic structural view of a sulfur hexafluoride low pressure density controller for checking and inflating without disassembly according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a checking and inflating seat in a disassembly-free checking and inflating sulfur hexafluoride low-pressure density controller according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a check valve in a sulfur hexafluoride low pressure density controller without disassembly for calibration and inflation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The embodiment of the utility model provides a dismantle-free check-up, inflatable sulfur hexafluoride low pressure density controller, as shown in figure 1-3, including low barometer 1, check-up seat 2, check-up valve 3, the first end welding of check-up seat 2 has the joint 21, the joint 21 passes through first sealing washer 211 and first nut 212 and low barometer 1 fixed connection, and the second end welding has body fixed joint 22, body fixed joint 22 passes through second sealing washer 221 and coupling nut 222 and is connected with gas appliances, and the third end is connected with check-up valve 3, like this, through check-up valve 3 control in normal work, realize that check-up seat 2's first end and second end pass through the third end intercommunication, when aerifing for equipment such as cubical switchboard, realize that outside other get into the third end, first end and second end keep the intercommunication through the third end simultaneously, when checking-up low barometer 1, only the third end and the first end are kept communicated, so that the disassembly-free verification of the low-pressure gauge 1 is realized, and the gas-using equipment is inflated on the premise of not disassembling the low-pressure gauge 1.
In some embodiments, the checking inflating seat 2 is in a half Y shape, one end of the straight end is connected with the equipment, the other end of the short end is welded with a joint, and the other end of the circular arc is provided with a check valve 3. An aviation plug connected with the watch case is arranged on one side of the outer part of the shell and used for leading out a cable and has a waterproof function.
The checking inflation seat 2 comprises a seat body 23, a first connecting pipe 24 and a second connecting pipe 25, wherein a first vent hole 26 communicated with the second connecting pipe 25 is formed in one side, close to the low barometer 1, of the seat body 23, and the first vent hole 26 is communicated with the joint 21; one side of the seat body 23 close to the body fixing joint 22 is connected with one end of a first connecting pipe 24, the second vent 241 of the first connecting pipe 24 is communicated with the first connecting pipe 24, and the other end of the first connecting pipe 24 is communicated with the body fixing joint 22; either upper or lower side surface of the seat body 23 is connected with one end of a second connecting pipe 25, and the other end of the second connecting pipe 25 is connected with the check valve 3.
A third vent hole 251 and a fourth vent hole 252 are coaxially arranged in the second connecting pipe 25, the third vent hole 251 is communicated with the second vent hole 241 of the first connecting pipe 24, and the fourth vent hole 252 is communicated with the first vent hole 26; the communication state of the third vent hole 251 and the fourth vent hole 252 is controlled by the check valve 3.
The other end of the second connecting pipe 25 is eccentrically provided with a U-shaped joint 27, and the U-shaped joint 27 is connected with the check valve 3 through a third sealing ring 271.
A closing surface boss 272 communicated with the third vent hole 251 is arranged in the U-shaped joint 27, and the communication state of the third vent hole 251 and the fourth vent hole 252 is controlled through the matching of the side surface, close to the check valve 3, of the closing surface boss 272 and the check valve 3.
The check valve 3 comprises a valve body 31, a push rod sleeve 32, a push rod 33, a spring 34, an o-shaped sealing ring 35 and an extension push rod 36, wherein the push rod 33 is arranged in the valve body 31 in a penetrating manner, the spring 34 and the push rod sleeve 32 are sleeved on one side of the push rod 33, and the other end of the push rod 33 is connected with the interior of the valve body 31 in a sealing manner through the sleeved o-shaped sealing ring 35; an extending ejector rod 36 is arranged at one end of the ejector rod 33 close to the U-shaped joint 27.
One end of the extending ejector rod 36 close to the U-shaped joint 27 is provided with a bulge 361 matched with the closing surface boss 271; the outside cover of arch 361 is equipped with fourth sealing washer 362.
The check valve 3 is provided with a fifth sealing ring 37 and a protective cap 38.
The utility model discloses a working process:
the first vent hole 26 and the fourth vent hole 252 are always in a communicating state, and the third vent hole 251 and the second vent hole 241 are always in a communicating state.
During normal operation, the third vent hole 251 and the fourth vent hole 252 are communicated with each other through the cavity of the U-shaped joint 27, and the air paths are communicated. SF6 gas in equipment such as a switch cabinet and the like passes through the second vent hole 241, the third vent hole 251 to the cavity of the U-shaped joint 27 and then passes through the fourth vent hole 252, the first vent hole 26 and the joint 21 to reach the low-pressure gauge 1, so that SF6 gas in the equipment such as the switch cabinet and the like is monitored.
When the equipment such as the switch cabinet is inflated, the push rod 33 of the check valve 3 generates a stroke L1, at this time, the o-shaped sealing ring 35 on the push rod 33 is separated from the sealing surface of the valve body 31 to form a passage of air flow, the third vent hole 251 and the fourth vent hole 252 are still communicated, and the external air reaches the cavity of the U-shaped joint 27 through the first air inlet channel 331 and the second air inlet channel 332, and then enters the equipment such as the switch cabinet through the third vent hole 251 and the second vent hole 241.
When the low pressure gauge 1 is verified, the ejector 33 of the check valve 3 generates a stroke L2(L2 > L1), and the o-ring 35 on the ejector 33 is separated from the sealing surface of the valve body 31 to form an air flow passage. The extension push rod 36 fixed at the tail of the push rod 33 moves, and the protrusion 361 and the fourth sealing ring 362 on the extension push rod 36 extrude the closing surface boss 271 to form a seal, so that the air flow of the third vent hole 251 is cut off, namely, the equipment air passage is closed. At this time, the verification device and the low-pressure gauge 1 form a loop through the first vent hole 26 and the fourth vent hole 252, so that online verification of the low-pressure gauge 1 can be realized; after the verification is completed, the ejector rod 3 of the check valve 3 rebounds the ejector rod 33 to the original position under the dual action of the elasticity of the spring 34 and the pressure of SF6 gas in the equipment, and the o-shaped sealing ring 35 on the ejector rod 33 forms a seal with the sealing surface of the valve body 31 again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (8)
1. The utility model provides a exempt from to dismantle check-up, inflatable sulfur hexafluoride low pressure density controller which characterized in that, includes low barometer, check-up seat of inflating, check-up check valve, the first end welding of check-up seat of inflating has the joint, connect through first sealing washer and first nut and low barometer fixed connection, the second end welding has body fixed joint, body fixed joint passes through the second sealing washer and coupling nut and is connected with gas appliances, and the third end is connected with the check valve.
2. The disassembly-free checking and inflating sulfur hexafluoride low pressure density controller as claimed in claim 1, wherein the checking and inflating seat comprises a seat body, a first connecting pipe and a second connecting pipe, a first vent hole communicated with the second connecting pipe is formed in one side of the seat body close to the low pressure gauge, and the first vent hole is communicated with the joint; one side of the seat body, which is close to the body fixed joint, is connected with one end of a first connecting pipe, a second vent hole of the first connecting pipe is communicated with the first connecting pipe, and the other end of the first connecting pipe is communicated with the body fixed joint; any side surface of the upper side and the lower side of the seat body is connected with one end of a second connecting pipe, and the other end of the second connecting pipe is connected with the check valve.
3. The disassembly-free check-up and inflation sulfur hexafluoride low pressure density controller as claimed in claim 2, wherein a third vent hole and a fourth vent hole are coaxially arranged in the second connecting pipe, the third vent hole is communicated with the second vent hole of the first connecting pipe, and the fourth vent hole is communicated with the first vent hole; and the communication state of the third vent hole and the fourth vent hole is controlled by the check valve.
4. The disassembly-free checking and inflating sulfur hexafluoride low pressure density controller as claimed in claim 3, wherein the other end of the second connecting pipe is eccentrically provided with a U-shaped joint, and the U-shaped joint is connected with the check valve through a third sealing ring.
5. The disassembly-free checking and inflating sulfur hexafluoride low pressure density controller as claimed in claim 4, wherein a closing surface boss communicated with the third vent hole is arranged in the U-shaped joint, and the communication state of the third vent hole and the fourth vent hole is controlled by the matching of the side surface of the closing surface boss close to the check valve and the check valve.
6. The disassembly-free check and inflation sulfur hexafluoride low pressure density controller as claimed in claim 5, wherein the check valve comprises a valve body, a push rod sleeve, a push rod, a spring, an o-shaped sealing ring and an extension push rod, the push rod is arranged in the valve body in a penetrating manner, the spring and the push rod sleeve are sleeved on one side of the push rod, and the other end of the push rod is connected with the interior of the valve body in a sealing manner through the sleeved o-shaped sealing ring; and an extension ejector rod is arranged at one end of the ejector rod close to the U-shaped joint.
7. The disassembly-free checking and inflating sulfur hexafluoride low pressure density controller as claimed in claim 6, wherein a protrusion matched with the closed surface boss is arranged at one end of the extending ejector rod close to the U-shaped joint; a fourth sealing ring is sleeved outside the protrusion.
8. The disassembly-free checking and inflating sulfur hexafluoride low pressure density controller as claimed in any one of claims 1-7, wherein the check valve is provided with a fifth sealing ring and a protective cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486896.XU CN211927604U (en) | 2020-04-07 | 2020-04-07 | Disassembly-free check and inflation-free sulfur hexafluoride low-pressure density controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020486896.XU CN211927604U (en) | 2020-04-07 | 2020-04-07 | Disassembly-free check and inflation-free sulfur hexafluoride low-pressure density controller |
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| CN211927604U true CN211927604U (en) | 2020-11-13 |
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| CN202020486896.XU Active CN211927604U (en) | 2020-04-07 | 2020-04-07 | Disassembly-free check and inflation-free sulfur hexafluoride low-pressure density controller |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933467A (en) * | 2021-10-26 | 2022-01-14 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride decomposition product gas pressure monitoring device based on gas in-situ detection |
-
2020
- 2020-04-07 CN CN202020486896.XU patent/CN211927604U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113933467A (en) * | 2021-10-26 | 2022-01-14 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride decomposition product gas pressure monitoring device based on gas in-situ detection |
| CN113933467B (en) * | 2021-10-26 | 2024-02-13 | 国网浙江省电力有限公司电力科学研究院 | Sulfur hexafluoride decomposition product air pressure monitoring device based on gas in-situ detection |
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