CN210890216U - Check valve - Google Patents

Abstract

The utility model relates to a check valve, which comprises an equipment interface, a gas densimeter interface, a check interface, a valve switch and a valve body with a cavity inside; the valve body is respectively connected with the equipment interface, the gas densimeter interface, the check interface and the valve switch. The utility model discloses a check valve simple structure, convenient to use collects and aerifys and check-up function, removes the flow of dismantling the densimeter from, has improved calibration efficiency, has prolonged the life of equipment, has reduced the risk of gas leakage, has improved power supply unit's security performance.

Description

Check valve

Technical Field

The utility model relates to a valve switch technical field, concretely relates to check valve.

Background

High voltage circuit breakers and related high voltage equipment insulated with SF6 involve periodic verification of SF6 densitometers, and long term disassembly of densitometers can result in damage to the equipment and threads at the densitometer joints, risking SF6 gas leakage from the equipment.

SUMMERY OF THE UTILITY MODEL

Thereby dismantle the densimeter for a long time that exists in the SF6 densimeter check-up in solving above-mentioned current high-pressure equipment and lead to the problem that joint department screw thread damage leads to equipment gas leakage, the utility model provides a check valve, simple structure, convenient to use collects and aerifys and check-up function, removes the flow of dismantling the densimeter from, has improved the check-up efficiency, has prolonged the life of equipment, has reduced gas leakage's risk, has improved power supply unit's security performance.

In order to solve the technical problem, the utility model provides a following technical scheme:

a check valve comprises an equipment interface, a gas densimeter interface, a check interface, a valve switch and a valve body with a cavity inside; the valve body is respectively connected with the equipment interface, the gas densimeter interface, the check interface and the valve switch. The check valve of the utility model has simple structure and convenient use, when the valve switch is opened, the gas densimeter interface, the check interface and the equipment interface are all communicated, and the air supplement of the high-voltage equipment can be realized through the connection of the check interface and the external inflating equipment; when the valve switch is closed, the equipment interface is cut off from the other two interfaces, and the gas densimeter interface is communicated with the verification interface, so that the densimeter can be verified without dismantling the gas densimeter, and the verification efficiency of the densimeter is improved; the whole valve integrates the functions of air supply and verification, avoids the problem that the high-voltage equipment and the densimeter interface are easy to damage in the existing verification mode, prolongs the service life of the equipment, reduces the risk of gas leakage, and improves the safety performance of the power supply equipment.

Further, the equipment interface sets up the below of valve body, the gas densimeter interface sets up the top of valve body, the check-up interface with the valve switch sets up respectively two different sides of valve body, through setting up the valve switch in the side of valve body, then sets up in the centre of equipment interface and gas densimeter interface, can cut off this internal air supply of high-pressure equipment better when the check-up, makes things convenient for the connection of gas densimeter interface and check-up interface, conveniently carries out the check-up of densimeter.

Furthermore, the equipment interface, the gas densimeter interface and between the check-up interface all with the valve body intercommunication for whole valve body collects tonifying qi and check-up function, need not dismantle the densimeter and just can accomplish the check-up, has improved the efficiency of check-up.

Further, the valve switch comprises a screw cap, a screw rod and a stop block; the nut with end the piece and connect respectively the both ends of screw rod, the nut sets up the outside of valve body, it sets up to end the piece the inside of valve body, the screw rod with valve body threaded connection just can accomplish the inside air supply of high-pressure equipment body and the inside connection of valve body through rotatory nut, convenient to use.

Furthermore, a circulation hole is arranged between the equipment interface and the valve body, and the center of the circulation hole and the center of the stop block are on the same straight line, so that the air source in the high-pressure equipment body can be better prevented from flowing into the valve body.

Furthermore, the stop block and the circulation hole are both circular, the diameter of the stop block is larger than that of the circulation hole, and the blocking effect is good.

Furthermore, the valve body is made of stainless steel, hard in material and long in service life.

Furthermore, the check interface is of a check valve structure, so that gas inside the valve body can be effectively prevented from leaking.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model provides a check valve simple structure, convenient to use collects and aerifys and check-up function, removes the flow of dismantling the densimeter from, has improved calibration efficiency, has prolonged the life of equipment, has reduced the risk of gas leakage, has improved power supply unit's security performance.

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 description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of an external structure of a check valve according to the present invention;

fig. 2 is the schematic diagram of the internal structure of a check valve of the present invention.

In the figure: 1. an equipment interface; 2. a gas densitometer interface; 3. checking an interface; 4. opening and closing a valve; 5. a valve body; 6. a nut; 7. a screw; 8. a stop block; 9. and (4) a flow hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides an include:

as shown in fig. 1, the check valve comprises an equipment interface 1, a gas densimeter interface 2, a check interface 3, a valve switch 4 and a valve body 5 with a cavity inside; the valve body 5 is respectively connected with the equipment interface 1, the gas densimeter interface 2, the check interface 3 and the valve switch 4. The utility model has simple structure and convenient use, when the valve switch 4 is opened, the gas densimeter interface 2, the calibration interface 3 and the equipment interface 1 are communicated, and the gas supplement of the high-pressure equipment can be realized through the connection of the calibration interface 3 and the external gas charging equipment; when the valve switch 4 is closed, the equipment interface 1 and the other two interfaces are cut off, and the gas densimeter interface 2 is communicated with the verification interface 3, so that the densimeter can be verified without dismantling the gas densimeter, and the verification efficiency of the densimeter is improved; the whole valve integrates the functions of air supply and verification, avoids the problem that the high-voltage equipment and the densimeter interface are easy to damage in the existing verification mode, prolongs the service life of the equipment, reduces the risk of gas leakage, and improves the safety performance of the power supply equipment.

As shown in fig. 1, the equipment interface 1 sets up the below of valve body 5, gas densimeter interface 2 sets up the top of valve body 5, check up interface 3 with valve switch 4 sets up respectively two different sides of valve body 5, through setting up valve switch 4 in the side of valve body 5, then sets up in the centre of equipment interface 1 and gas densimeter interface 2, can cut off the internal air supply of high-pressure equipment better when the check-up, makes things convenient for the connection of gas densimeter interface 2 and check up interface 3, conveniently carries out the check-up of densimeter.

As shown in fig. 2, the device interface 1, the gas densimeter interface 2, and the verification interface 3 are all communicated with the valve body 5, so that the whole valve body 5 integrates the functions of gas supply and verification, the verification can be completed without disassembling the densimeter, and the verification efficiency is improved.

As shown in fig. 2, the valve switch 4 includes a nut 6, a screw 7, and a stop block 8; nut 6 with stop block 8 and connect respectively the both ends of screw rod 7, nut 6 sets up the outside of valve body 5, stop block 8 sets up the inside of valve body 5, screw rod 7 with 5 threaded connection of valve body just can accomplish the inside air supply of high-pressure equipment body and be connected convenient to use with the inside of valve body 5 through rotatory nut 6.

As shown in fig. 2, a flow hole 9 is provided between the device interface 1 and the valve body 5, and the center of the flow hole 9 is aligned with the center of the stop block 8, so that the gas source inside the high-pressure device body can be better blocked from flowing into the valve body 5.

In this embodiment, the stop block 8 and the flow hole 9 are both circular, and the diameter of the stop block 8 is larger than that of the flow hole 9, so that the blocking effect is good.

In this embodiment, the valve body 5 is made of stainless steel, and has a hard material and a long service life.

In this embodiment, the check interface 3 is a check valve structure, which can effectively prevent gas inside the valve body 5 from leaking out.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.

Claims (8)

1. A check valve is characterized by comprising an equipment interface, a gas densimeter interface, a check interface, a valve switch and a valve body with a cavity inside; the valve body is respectively connected with the equipment interface, the gas densimeter interface, the check interface and the valve switch.

2. The check valve of claim 1, wherein the device interface is disposed below the valve body, the gas densitometer interface is disposed above the valve body, and the check interface and the valve switch are disposed on two different sides of the valve body, respectively.

3. The check valve of claim 2, wherein the device interface, the gas densitometer interface, and the check interface all communicate with the valve body therebetween.

4. The verification valve of claim 3, wherein the valve switch comprises a nut, a screw, and a stop block; the nut with cut off the piece and connect respectively the both ends of screw rod, the nut sets up the outside of valve body, it sets up to cut off the piece the inside of valve body, the screw rod with valve body threaded connection.

5. The check valve of claim 4, wherein a flow hole is provided between the device interface and the valve body, and a center of the flow hole is collinear with a center of the stop block.

6. The check valve of claim 5, wherein the stop block and the flow hole are both circular, the stop block having a diameter greater than a diameter of the flow hole.

7. The verification valve of any one of claims 1-6, wherein the valve body is stainless steel.

8. The verification valve of claim 7, wherein the verification interface is a check valve structure.

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