CN220120322U - Leak detection device for valve - Google Patents

Abstract

Embodiments of the present disclosure provide a valve leak detection apparatus including a base joint, an expansion joint set including at least one expansion joint of a preset size class, a leak guiding pipe, and a leak guiding container; the basic joint can be independently applied or combined with the expansion joint according to valves with different inner diameters so as to be communicated with the valves with different inner diameters in a sealing way; the first end of the leakage guiding pipe is communicated with the basic joint in a sealing way, and the second end of the leakage guiding pipe is inserted into the leakage guiding container. Through basic joint, expansion joint group, leak guiding pipe and the leak guiding container that set up, can reduce leak hunting device's weight and volume, reduction in production cost also can improve leak hunting device and valve's assembly swiftly, improves operating efficiency, can also improve leak hunting device and valve between complex leakproofness, improves the accuracy of testing result.

Description

Leak detection device for valve

Technical Field

The embodiment of the disclosure belongs to the technical field of valve detection, and particularly relates to a valve leakage detection device.

Background

A valve is an important fluid mechanical device that functions as a fluid shut-off, regulation, and bleed on a process system pipe. There are two key performance indicators for valves: the valve comprises an outer sealing performance and an inner sealing performance, wherein the outer sealing mainly detects the sealing performance of a valve shell, and the inner sealing mainly detects the sealing performance of a valve core and a valve seat sealing pair. For some key valves, the internal sealing performance is very strict, gas is used for detection during internal sealing detection, and common detection gases include compressed air, nitrogen, helium and the like; during the test, the gas medium for the test is introduced into the inlet of the valve, the leak detection device is arranged at the outlet of the valve, the leak detection device is usually a flange blind plate or a plug, a leak detection air pipe is reserved above the flange blind plate or the plug, the leak detection air pipe is inserted into water, and the sealing performance of the valve can be quantitatively detected by counting the number of bubbles overflowed in the air pipe.

The common leak detection device is provided with flange blind plates or plugs and the like, the apertures of the valves are different, the apertures of the common valves are mainly distributed in the DN10-DN400 range, the common leak detection blind plates can be respectively customized according to different apertures of the valves, the required blind plates are more, the flange blind plates are required to be connected with the valves through bolts, the operation cost is high, the operation efficiency is low, and meanwhile, more sites are occupied. At present, a plug is also used as a plugging device, the plug is designed into a conical structure, the plug is made of rubber or silica gel, so that a certain valve caliber can be covered, but the coverage is still smaller, a plurality of plugs are required to be prepared, meanwhile, the plugs and the valve outlet have no reliable matching structure, loosening easily occurs, and the accuracy of a detection result is greatly influenced.

In view of the above, the inventor designs a new leak detection device for a valve, which mainly solves the problems of large weight and volume of the leak detection device at the present stage, low assembly efficiency of the leak detection device and the valve, poor sealing performance of the leak detection device and the valve, and low accuracy of the detection result.

Disclosure of Invention

Embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a valve leak detection device.

Embodiments of the present disclosure provide a valve leak detection apparatus including a base joint, an expansion joint set including at least one expansion joint of a preset size class, a leak guiding pipe, and a leak guiding container;

the basic joint can be independently applied or combined with the expansion joint according to valves with different inner diameters so as to be communicated with the valves with different inner diameters in a sealing way; the first end of the leakage guiding pipe is communicated with the basic joint in a sealing way, and the second end of the leakage guiding pipe is inserted into the leakage guiding container.

Optionally, the basic joint includes a basic insertion portion and a basic limit portion;

the outer diameter of the basic insertion part is in sealing communication with the inner diameter of the valve or the inner diameter of the expansion joint assembled with the valve;

the diameter of the basic limiting part is larger than that of the basic inserting part, and the basic limiting part is externally clamped at the outer side of the valve or the outer side of the expansion joint assembled with the valve.

Optionally, a first sealing groove is formed in the peripheral surface of the basic insertion portion along the circumferential direction of the basic insertion portion, and the first sealing groove is used for placing a first sealing ring.

Optionally, the basic insertion portion and the basic limiting portion are both provided in a ring shape.

Optionally, the expansion joint comprises an expansion insertion part and an expansion limiting part;

the outer diameter of the expansion insertion part is in sealing communication with the inner diameter of the valve or the inner diameter of an expansion joint of the next preset size level assembled with the valve, and the inner diameter of the expansion insertion part is in sealing communication with the outer diameter of the basic joint or the outer diameter of an expansion joint of the last preset size level assembled with the basic joint;

the diameter of the expansion limiting part is larger than that of the expansion inserting part, and the expansion limiting part is externally clamped at the outer side of the valve or the outer side of the expansion joint assembled.

Optionally, a second sealing groove is formed in the peripheral surface of the expansion insertion portion along the circumferential direction of the expansion insertion portion, and the second sealing groove is used for placing a second sealing ring.

Optionally, the expansion insertion portion and the expansion limiting portion are both provided in a ring shape.

Optionally, the valve leak detection device further comprises an air pipe joint;

the first end of the air pipe joint is communicated with the basic joint in a sealing way, and the second end of the air pipe joint is communicated with the first end of the leakage guiding pipe in a sealing way.

Optionally, the base joint and the expansion joint are formed from a non-metallic material.

Optionally, the basic joint comprises a small-caliber basic joint, a medium-caliber basic joint and a large-caliber basic joint;

the small-caliber basic joint, the medium-caliber basic joint and the large-caliber basic joint are correspondingly applied to a small-caliber valve, a medium-caliber valve and a large-caliber valve respectively.

The valve leakage detecting device of the embodiment of the disclosure can reduce the weight and the volume of the leakage detecting device, reduce the production cost and improve the assembly rapidity of the leakage detecting device and the valve through the arranged basic joint, the expansion joint group, the leakage guiding pipe and the leakage guiding container,

the operation efficiency is improved, the sealing performance of the matching between the leak detection device and the valve can also be improved, and the accuracy of the detection result is improved.

Drawings

FIG. 1 is a schematic diagram of a valve leak detection apparatus according to an embodiment of the disclosure;

FIG. 2 is a schematic illustration of an expansion joint and base joint assembly according to another embodiment of the present disclosure;

FIG. 3 is a schematic view of an embodiment of the present disclosure in which an air connection is assembled with a base connection;

fig. 4 is a schematic structural view of an expansion joint according to another embodiment of the present disclosure.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 4, a valve leak detection apparatus 100, the valve leak detection apparatus 100 includes a base joint 110, an expansion joint group 120, a leak-off pipe 130, and a leak-off container 140, the expansion joint group 120 including at least one expansion joint 121 of a predetermined size class. The base sub 110 can be used alone or in combination with the expansion sub 121 to sealingly communicate with valves 200 of different internal diameters depending on the valve 200 of the different internal diameters. The first end of the drain tube 130 is in sealed communication with the base sub 110 and the second end of the drain tube 130 is inserted into the drain receptacle 140.

Specifically, as shown in fig. 1, when the internal sealing performance of the valve 200 needs to be detected, if the size of the designed basic joint 110 is consistent with the size of the flange hole or the pipe inner hole of the valve 200, the basic joint 110 can be directly inserted into the flange hole or the pipe inner hole of the valve 200 and can realize sealing communication. A test gas medium is introduced into the inlet of the valve 200, and the gas medium enters from the valve 200, passes through the base joint 110 to the drain pipe 130, and enters the drain container 140 after reaching the drain pipe 130. The leakage guide container 140 is used for containing a liquid medium, the second end of the leakage guide pipe 130 is inserted into the liquid medium, when the gas medium enters the liquid medium through the leakage guide pipe 130, bubbles are generated in the liquid medium, and the inner sealing performance of the valve 200 is quantitatively detected by counting the number of the bubbles. It should be noted that the liquid medium may be water, and of course, other liquids may be used in addition to water, which is not particularly limited in this embodiment.

If the size of the designed basic joint 110 is smaller than the size of the flange hole or the pipe inner hole of the valve 200, the basic joint 110 needs to be sleeved on the expansion joint 121 (the expansion joint 121 is the expansion joint group 120) with a preset size level, the basic joint is in sealing connection with the expansion joint 121, and then the expansion joint 121 is inserted into the flange hole or the pipe inner hole of the valve 200 to realize sealing communication. The inlet of the valve 200 is filled with a test gas medium, and the gas medium enters the liquid medium as in the flowing process to count and quantify the number of bubbles, so that the inner sealing performance of the valve 200 is detected. It should be understood that, as shown in fig. 1 and 2, if the basic joint 110 and one expansion joint 121 cannot be connected with the valve 200 in a sealing manner after being assembled, the expansion joints 121 with different preset size levels may be assembled to form an expansion joint group 120 according to actual needs, then the basic joint 110 is sleeved on the expansion joint group 120, and the expansion joint group 120 is inserted into a flange hole or a pipe inner hole of the valve 200 and is connected in a sealing manner. The subsequent operation flow is as described above and will not be described here.

It should be noted that, for the expansion joint group 120, it may include only one expansion joint 121 with a preset size level, or may include two, three, or more expansion joints 121 with different preset size levels. When a predetermined size level of expansion joint 121 is assembled with base joint 110 to provide sealing communication with the internal bore of the conduit of valve 200, then expansion joint set 120 includes only one expansion joint. When sealing communication with the inner hole of the pipeline of the valve 200 cannot be achieved after the expansion joint 121 with a preset size level is assembled with the base joint 110, the expansion joint with the next preset size level can be sleeved outside the expansion joint 121 with the preset size level, and if sealing communication with the valve 200 can be achieved at this time, the expansion joint group 120 comprises two expansion joints. Similarly, the expansion joint set 120 may include expansion joints of different preset size levels, and two adjacent expansion joints of different preset size levels have corresponding sizes for nesting connection therebetween.

According to the valve leakage detection device disclosed by the embodiment of the disclosure, the weight and the volume of the leakage detection device can be reduced, the production cost can be reduced, the assembly rapidity of the leakage detection device and a valve can be improved, the operation efficiency can be improved, the matched tightness between the leakage detection device and the valve can be improved, and the accuracy of a detection result can be improved through the set basic connector, the expansion connector or the expansion connector set with the preset size level, the leakage guiding pipe and the leakage guiding container.

Illustratively, as shown in fig. 1 to 3, the base joint 110 includes a base insertion portion 111 and a base stopper portion 112. The outer diameter of the basic insert 111 is in sealing communication with the inner diameter of the valve 200 or the inner diameter of the expansion joint 121 in combination. The diameter of the basic limiting part 112 is larger than that of the basic inserting part 111, and the basic limiting part 112 is clamped outside the valve 200 or outside the expansion joint 121 assembled with the valve.

Specifically, as shown in fig. 1 to 3, when the internal sealing performance of the valve 200 needs to be detected, if the outer diameter of the basic insertion portion 111 of the designed basic joint 110 is consistent with the inner diameter of the valve 200, the basic insertion portion 111 may be directly inserted into the valve 200 to realize sealing connection between the two. The basic limiting portion 112 is externally clamped at the outer side of the valve 200 to limit the basic insertion portion 111, so that the basic insertion portion 111 is prevented from being pushed into the valve body 200 by too strong force to be taken out.

If the outer diameter of the basic insertion portion 111 of the designed basic joint 110 is smaller than the inner diameter of the valve 200, the basic insertion portion 111 may be inserted into the inner diameter of the expansion joint 121 of a predetermined size level to achieve a sealed connection of the basic insertion portion 111 and the expansion joint 121. The basic limiting portion 112 is externally clamped outside the expansion joint 121 to limit the basic insertion portion 111. If the basic joint 110 and one expansion joint 121 cannot be connected with the valve 200 in a sealing manner after being assembled, the expansion joints 121 with different preset size levels can be assembled to form an expansion joint group 120 according to actual needs, then the basic insertion part 111 of the basic joint 110 is inserted into the corresponding inner diameter of the expansion joint group 120, and then the expansion joint group 120 is inserted into the inner diameter of the valve 200 to realize sealing communication, and at this time, the basic limiting part 112 is clamped outside the expansion joint group 120 to limit the basic insertion part 111.

According to the valve leakage detection device disclosed by the embodiment of the disclosure, through the basic insertion part and the basic limiting part which are arranged on the basic joint, design materials of the basic joint can be reduced, so that the weight and the volume of the leakage detection device are reduced, the production cost is reduced, and meanwhile, the assembly convenience and the tightness of the basic joint and the valve can be improved.

Further, as shown in fig. 1 and 3, the outer circumferential surface of the basic insertion portion 111 is provided with a first sealing groove (not shown) along the circumferential direction thereof, and the first sealing groove is used for placing the first sealing ring 1111. By providing the first sealing groove to place the first sealing ring 1111, the sealing between the base joint 110 and the valve 200 or the expansion joint 121 can be better achieved, and leakage of the gaseous medium from the gap between the base joint 110 and the valve body 200 can be more effectively prevented.

Further, the basic insertion portion 111 and the basic stopper portion 112 are each provided in a circular ring shape. This arrangement may further reduce the design materials of the base joint while better fitting with the valve or expansion joint.

Illustratively, as shown in fig. 1, 2 and 4, the expansion joint 121 includes an expansion insertion portion 122 and an expansion limiting portion 123. The outer diameter of the expansion insert 122 is in sealing communication with the inner diameter of the expansion joint 121 of the next preset size class of the inner diameter or the matched set of the valve 200, and the inner diameter of the expansion insert 122 is in sealing communication with the outer diameter of the expansion joint 121 of the previous preset size class of the outer diameter or the matched set of the base joint 110. The diameter of the expansion limiting part 123 is larger than that of the expansion inserting part 122, and the expansion limiting part 123 is externally clamped at the outer side of the valve 200 or the outer side of the expansion joint 121 assembled with the valve.

Specifically, as shown in fig. 1, 2 and 4, the expansion joint 121 is designed to include an expansion insertion portion 122 and an expansion limit portion 123. When the expansion joint 121 of a predetermined size class is assembled with the base joint 110 to be in sealing communication with the valve 200, the outer diameter of the expansion insert 122 of the expansion joint 121 corresponds to the inner diameter of the valve 200, and the inner diameter of the expansion insert 122 of the expansion joint 121 corresponds to the outer diameter of the base joint 110.

When the expansion joint 121 of the preset size level cannot be in sealing communication with the valve 200 after being assembled with the base joint 110, the expansion joint of the next preset size level needs to be sleeved at the outer diameter of the expansion insertion part 122 of the expansion joint 121 to form an expansion joint group 120, and the outer diameter of the expansion insertion part 122 of the expansion joint 121 in the expansion joint group 120 is consistent with the inner diameter of the expansion insertion part of the expansion joint of the next preset size level to realize sealing communication, so as to achieve the pushing.

After the expansion joints 121 of different preset sizes are assembled to form the expansion joint group 120, the inner diameter of the expansion insertion part 122 of each expansion joint 121 in the expansion joint group 120 is consistent with the outer diameter of the expansion insertion part of the expansion joint of the previous preset size level so as to realize sealing communication. It should be noted that, the diameter of each expansion limiting portion 123 is larger than the diameter of the expansion inserting portion 122, so that the expansion limiting portion 122 is externally clamped on the outer side of the valve 200 or the outer side of the expansion joint of the next preset size level assembled.

According to the valve leakage detection device disclosed by the embodiment of the disclosure, through the expansion insertion part and the expansion limiting part which are arranged on the expansion joint, the design materials of the expansion joint can be reduced, so that the weight and the volume of the leakage detection device are further reduced, the production cost is reduced, meanwhile, the assembly rapidity of the leakage detection device and the valve can be further improved, and the operation efficiency and the matching tightness are improved.

Further, as shown in fig. 4, the outer peripheral surface of the expansion insertion part 122 is provided with a second sealing groove (not shown) along the circumferential direction thereof, and the second sealing groove is used for placing a second sealing ring 1222. By arranging the second sealing groove to place the second sealing ring 1222, the sealing between the expansion joint and the valve and between the expansion joints can be better realized, and the leakage of the gas medium from the gaps can be prevented.

Still further, the expansion insertion part 122 and the expansion limiting part 1222 are each provided in a ring shape. This arrangement can further reduce the design materials of the expansion joints while better fitting the valves and between the expansion joints.

Illustratively, as shown in FIGS. 1-3, the valve leak detection apparatus 100 further includes an air line connection 113. The first end of the air fitting 113 is in sealed communication with the base fitting 110, and the second end of the air fitting 110 is in sealed communication with the first end of the drain tube 130. The air pipe joint can improve the tightness between the basic joint and the leakage guiding pipe.

The base connector 110 and the extension connector 121 are formed by non-metallic materials. For example, aluminum alloy or nylon is selected, although other nonmetallic materials can be used to prepare the basic joint and the expansion joint, which is not particularly limited in this embodiment. The weight of the basic joint and the expansion joint can be reduced better by adopting nonmetallic materials for preparation.

Illustratively, the base sub 110 includes a small-bore base sub, a medium-bore base sub, and a large-bore base sub. The small-caliber basic joint, the medium-caliber basic joint and the large-caliber basic joint are correspondingly applied to a small-caliber valve, a medium-caliber valve and a large-caliber valve respectively.

As a specific example, the valves 200 of different inner diameters may be classified into three kinds of valves of small-caliber valve, medium-caliber valve and large-caliber valve according to the inner diameter thereof. Each type of valve selects a basic size, for example, a small-caliber valve selects DN10 as a basic size, a medium-caliber valve selects DN100 as a basic size, and a large-caliber valve selects DN200 as a basic size. The basic joint 110 is designed to be a DN10 small-size basic joint, a DN100 medium-caliber basic joint and a DN200 large-caliber basic joint with corresponding sizes. When it is desired to test a valve that is consistent with the basic joint dimensions, the basic joint may be directly inserted into the valve inner diameter for testing. When a valve with the size similar to that of the basic joint needs to be detected, an expansion joint with a corresponding preset size level can be sleeved outside the corresponding basic joint for detection, and the specific application method is as described above and is not repeated here.

According to the valve leakage detection device disclosed by the embodiment of the utility model, the operation rapidness can be better improved by setting the size type of the valve and designing the basic joint corresponding to the size type of the valve.

It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.

Claims (10)

1. The valve leakage detection device is characterized by comprising a basic joint, an expansion joint group, a leakage guiding pipe and a leakage guiding container, wherein the expansion joint group comprises at least one expansion joint with a preset size level;

the basic joint can be independently applied or combined with the expansion joint according to valves with different inner diameters so as to be communicated with the valves with different inner diameters in a sealing way; the first end of the leakage guiding pipe is communicated with the basic joint in a sealing way, and the second end of the leakage guiding pipe is inserted into the leakage guiding container.

2. The valve leak detection apparatus of claim 1, wherein the base joint comprises a base insert portion and a base limit portion;

the outer diameter of the basic insertion part is in sealing communication with the inner diameter of the valve or the inner diameter of the expansion joint assembled with the valve;

the diameter of the basic limiting part is larger than that of the basic inserting part, and the basic limiting part is externally clamped at the outer side of the valve or the outer side of the expansion joint assembled with the valve.

3. The valve leakage detecting apparatus according to claim 2, wherein the outer circumferential surface of the basic insertion portion is provided with a first seal groove along a circumferential direction thereof, the first seal groove being for placing a first seal ring.

4. The valve leak detection apparatus of claim 2, wherein the primary insert portion and the primary limit portion are each provided in a circular shape.

5. The valve leak detection apparatus of claim 1, wherein the expansion joint comprises an expansion insert and an expansion limit;

the outer diameter of the expansion insertion part is in sealing communication with the inner diameter of the valve or the inner diameter of an expansion joint of the next preset size level assembled with the valve, and the inner diameter of the expansion insertion part is in sealing communication with the outer diameter of the basic joint or the outer diameter of an expansion joint of the last preset size level assembled with the basic joint;

the diameter of the expansion limiting part is larger than that of the expansion inserting part, and the expansion limiting part is externally clamped at the outer side of the valve or the outer side of the expansion joint assembled.

6. The valve leakage detection device according to claim 5, wherein the outer circumferential surface of the expansion insertion portion is provided with a second seal groove along the circumferential direction thereof, and the second seal groove is used for placing a second seal ring.

7. The valve leak detection apparatus of claim 5, wherein the expansion insert and the expansion limiter are each provided in a ring shape.

8. The valve leak detection apparatus as defined in any one of claims 1 to 7, wherein the valve leak detection apparatus further comprises an air line connection;

the first end of the air pipe joint is communicated with the basic joint in a sealing way, and the second end of the air pipe joint is communicated with the first end of the leakage guiding pipe in a sealing way.

9. The valve leak detection apparatus as defined in any one of claims 1 to 7, wherein the base joint and the extension joint are formed from a non-metallic material.

10. The valve leak detection apparatus as defined in any one of claims 1 to 7, wherein the base sub includes a small-bore base sub, a medium-bore base sub, and a large-bore base sub;

the small-caliber basic joint, the medium-caliber basic joint and the large-caliber basic joint are correspondingly applied to a small-caliber valve, a medium-caliber valve and a large-caliber valve respectively.