CN220649917U

CN220649917U - Sealing performance test device

Info

Publication number: CN220649917U
Application number: CN202322320807.0U
Authority: CN
Inventors: 朱治鸣
Original assignee: Wuhu Zhimin Safety Technology Service Co ltd
Current assignee: Wuhu Zhimin Safety Technology Service Co ltd
Priority date: 2023-08-25
Filing date: 2023-08-25
Publication date: 2024-03-22
Anticipated expiration: 2033-08-25

Abstract

The utility model discloses a sealing performance test device which comprises an air leakage eduction tube, a detection tank and a water inlet check tube, wherein the upper end of the detection tank is provided with a tank cover, the air leakage eduction tube and the water inlet check tube extend into the detection tank from the tank cover in a sealing manner, the tail end of the air leakage eduction tube in the detection tank is provided with a tail end tube perpendicular to the bottom surface of the detection tank, the tail end tube is provided with an outlet water inlet depth marking line, and the outlet of the water inlet check tube is arranged above the outlet water inlet depth marking line. The sealing performance test device is suitable for sealing performance tests of safety valves and various valves used on boilers, chemical pipelines and pressure vessels.

Description

Sealing performance test device

Technical Field

The utility model relates to a sealing test device, in particular to a sealing performance test device.

Background

With further deep industrialization in China, various types of valves such as safety valves, stop valves, gate valves and the like are widely used in industries such as boilers, chemical pipelines, pressure vessels and the like. Therefore, the sealing performance test is an indispensable detection work. For example, in the verification process of the safety valve, the sealing performance test is a necessary project. In general, the test is to determine whether the safety valve is qualified under the sealing test pressure according to the sound of the ear hearing leakage and whether the pointer of the pressure gauge is lowered or not by eyes (the sealing test pressure is greater than 90% of the opening pressure of the safety valve). Because the method is influenced by environmental noise, the ear hearing is easy to produce errors, and the trace leakage of the sealing surface is not obvious in reaction on the pressure gauge, the method cannot accurately judge whether the safety valve and the valve are leaked or not and the leakage degree.

GBT12243-2005 'spring direct load type safety valve', and the like, the sealing performance test needs to use a special tool to read the number of bubbles leaked from the safety valve, and the number of bubbles leaked per minute has a certain regulation. The sealing performance test standard and the requirement are also relevant for various types of valves such as stop valves, gate valves and the like. At present, a simple and effective method for judging the water inlet depth of the leakage outlet pipe by using various sealing performance test devices is not available. A permanent mark is carved on the 13mm position of the outlet of the leakage pipe of the detection tank, so that the water inlet depth can be observed visually and accurately, the bubble leakage data can be read correspondingly and accurately, and a sealing performance test can be performed.

Disclosure of Invention

The utility model aims to provide equipment, and the sealing performance test device is suitable for sealing performance tests of safety valves and various valves used on boilers, chemical pipelines and pressure vessels.

In order to achieve the above purpose, the utility model provides a sealing performance test device, which comprises an air leakage eduction tube, a detection tank and a water inlet check tube, wherein the upper end of the detection tank is provided with a tank cover, the air leakage eduction tube and the water inlet check tube are sealed and extend into the detection tank from the tank cover, the tail end of the air leakage eduction tube, which is positioned in the detection tank, is provided with a tail end tube perpendicular to the bottom surface of the detection tank, the tail end tube is provided with an outlet water inlet depth marking line, and the outlet of the water inlet check tube is arranged above the outlet water inlet depth marking line.

Preferably, the upper end of the detection tank is provided with an external thread interface, the tank cover comprises a middle hole cover which can be sleeved on the external thread interface in a threaded manner, the middle hole cover is arranged to be capable of passing through the air leakage eduction tube and the water inflow check tube, a fixed base plate and a sealing ring are arranged between the external thread interface and the middle hole cover, and the sealing ring is arranged on one side close to the external thread interface.

Preferably, the outlet of the water inlet check pipe is provided with an inclined cutting surface which can be attached to the outer wall of the air leakage eduction pipe, and the inclined cutting surface is fixedly connected with the outer wall of the air leakage eduction pipe.

Preferably, the outer end of the water inlet check pipe is arranged to be perpendicular to the top surface of the tank cover, and the inner end of the water inlet check pipe is arranged to be bent towards the direction of the air leakage eduction pipe.

Preferably, the inlet end of the leakage gas eduction tube is provided with an outer end tube, the outer end tube is perpendicular to the tail end tube, a first circular arc tube is arranged between the outer end tube and the tail end tube, and the first circular arc tube is arranged outside the detection tank.

Preferably, the inlet end of the leakage gas eduction tube is provided with an outer end tube, the outer end tube is parallel to the tail end tube and extends in the same direction, a second circular arc tube is arranged between the outer end tube and the tail end tube, and the second circular arc tube is arranged outside the detection tank.

Preferably, the inlet end of the leakage gas eduction tube is provided with an outer end tube, the outer end tube is parallel to the tail end tube and extends in the same direction, and a straight tube vertically penetrating through the tank cover is arranged between the outer end tube and the tail end tube.

Preferably, the sealing performance test device further comprises a sealing plug, and the inlet end of the leakage gas eduction tube is arranged to be capable of penetrating through in a sealing mode and being fixed on the sealing plug.

Preferably, the sealing performance test device further comprises a flange blind plate, and a through hole capable of installing the sealing plug is formed in the axis position of the flange blind plate.

Preferably, the sealing performance test device further comprises a fixing plate, and the fixing plate is sleeved and fixed at the inlet end of the leakage gas eduction tube and is clung to the sealing plug or the flange blind plate.

According to the technical scheme, the sealing performance test device is suitable for sealing performance tests of various valves used on boilers, chemical pipelines and pressure vessels.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic view of the structure of a first preferred embodiment of a sealing performance test apparatus;

FIG. 2 is a schematic view of the structure of a second preferred embodiment of the sealing performance test apparatus;

FIG. 3 is a schematic view of the structure of a third preferred embodiment of the sealing performance test apparatus;

FIG. 4 is a schematic cross-sectional view of a preferred embodiment of a can lid;

FIG. 5 is a schematic elevational view of a preferred embodiment of a can lid;

FIG. 6 is a schematic diagram of the connection of a sealing performance test device to various specifications of sealing plugs;

FIG. 7 is a schematic illustration of the connection of a first preferred embodiment of a sealing performance test apparatus;

FIG. 8 is a schematic illustration of the connection of a second preferred embodiment of a sealing performance test apparatus;

FIG. 9 is a schematic illustration of the attachment of a third preferred embodiment of a sealing performance test apparatus;

FIG. 10 is a schematic diagram of a seal performance test apparatus on a safety valve;

FIG. 11 is a schematic diagram of a seal performance test of the seal performance test apparatus on a first stop valve;

FIG. 12 is a schematic illustration of a sealing performance test of the sealing performance test apparatus on a second stop valve;

FIG. 13 is a schematic view of a seal performance test of the seal performance test apparatus on a first gate valve;

FIG. 14 is a schematic view of a seal performance test of the seal performance test apparatus on a second gate valve;

FIG. 15 is a graph of a sealing performance test of the sealing performance test apparatus on a first large caliber valve;

fig. 16 is a graph showing the sealing performance of the sealing performance test apparatus on the second large-caliber valve.

Description of the reference numerals

1-a detection tank; 2-a water inlet check pipe; 3-the inner end of the water inlet check pipe; 4-a middle hole cover; 5-a leakage extraction pipe; 6-outlet water depth mark line; 7-a first arc tube; 8-an outer end tube; 9-fixing a backing plate; 10-sealing rings; 11-a fixing plate; 12-end tube 13-external threaded interface; 14-a second arc tube; 15-straight pipes; 16-a first through hole; 17-a second through hole; 18-a central hole; 19-sealing plugs; 20-flange blind plates; 21-a safety valve; 22-a stop valve; a 23-gate valve; 24-large caliber valve; 25-syringe.

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

In the present utility model, unless otherwise indicated, terms such as "upper, lower, left, right, front, rear, and inner and outer" and the like are used merely to denote the orientation of the term in a conventional use state or are commonly understood by those skilled in the art, and should not be construed as limiting the term.

Referring to the sealing performance test device shown in fig. 1-5, the sealing performance test device comprises an air leakage eduction tube 5, a detection tank 1 and a water inlet check tube 2, wherein a tank cover is arranged at the upper end of the detection tank 1, the air leakage eduction tube 5 and the water inlet check tube 2 extend into the detection tank 1 in a sealing manner from the tank cover, the tail end of the air leakage eduction tube 5 in the detection tank 1 is provided with a tail end tube 12 perpendicular to the bottom surface of the detection tank 1, the tail end tube 12 is provided with an outlet water inlet depth marking line 6, and the outlet of the water inlet check tube 2 is arranged above the outlet water inlet depth marking line 6.

Through implementation of the technical scheme, the sealing performance test device is suitable for sealing performance tests of safety valves and various valves used on boilers, chemical pipelines and pressure vessels. During the use, insert gas leakage extraction pipe 5 and water inflow check pipe 2 in detecting tank 1, wherein keep the inner 3 mouthful of water inflow check pipe to be located water depth mark line top, insert the outer end seal of gas leakage extraction pipe 5 in waiting to detect the valve and detect blind plate seal assembly, receive the gas leakage in the valve of waiting to detect, then through the injection syringe 25 to water inflow check pipe 2 in water inflow check pipe 2, until the liquid level reaches the position of export income water depth mark line 6 can, under the general circumstances, export income water depth mark line 6's insert mark degree of depth is 13mm. Finally, the tightness of the valve to be detected can be experimentally evaluated by observing the number of bubbles in the detection tank 1.

In this embodiment, an external screw thread interface 13 is provided at the upper end of the detection tank 1, the tank cover comprises a middle hole cover 4 which can be sleeved on the external screw thread interface 13 in a screwed manner, the middle hole cover 4 is provided to be capable of passing through the air leakage lead-out pipe 5 and the water inflow check pipe 2, a fixed base plate 9 and a sealing ring 10 are provided between the external screw thread interface 13 and the middle hole cover 4, and the sealing ring 10 is provided at one side close to the external screw thread interface 13. By this arrangement, the cover is detachably closed to the test tank 1, and in addition, the center hole 18 provided in the center hole cover 4 can serve as a passage for the leak gas outlet pipe 5 and the water inlet check pipe 2. Correspondingly, a first through-hole 16 for the passage of the leakage air outlet pipe 5 and a second through-hole 17 for the passage of the water inlet check pipe 2 are also provided on the fixing base plate 9 and the sealing ring 10, respectively. The first through hole 16 and the second through hole 17 are respectively in close contact with the corresponding air leakage eduction tube 5 and the water inlet check tube 2, especially in close contact with the sealing ring 10, so that a good sealing effect is achieved.

In this embodiment, the outlet of the water inlet check pipe 2 is provided with an inclined cutting surface capable of being bonded to the outer wall of the air leakage pipe 5, and the inclined cutting surface is fixedly connected to the outer wall of the air leakage pipe 5. By means of the arrangement, the water inlet check pipe 2 can support the air leakage outlet pipe 5 to a certain extent, and the air leakage outlet pipe 5 is more stable. The outlet of the water inlet check pipe 2 only needs to reserve a water outlet which can normally feed water. Reducing the area of the drain opening can also reduce the evaporation loss of the detected water.

In this embodiment, the outer end of the water inlet check pipe 2 is arranged perpendicularly to the top surface of the can lid, and the inner end 3 of the water inlet check pipe is arranged to be curved in the direction of the blow-by gas outlet pipe 5. The oblique cutting surface and the air leakage leading-out pipe 5 are easier to connect through the bending, and the oblique cutting surface and the air leakage leading-out pipe 5 can be fixed in a glue sealing and bonding mode. Of course, in order to match the circular arc surface of the sidewall of the leakage air extraction pipe 5, the contact surface of the oblique cut surface and the leakage air extraction pipe 5 should also be provided in an arc shape.

Referring to the specific embodiments shown in fig. 1, 6, 7, 10, 12, 14 and 16, the inlet end of the leakage air outlet pipe 5 is provided with an outer end pipe 8, the outer end pipe 8 is perpendicular to the end pipe 12, a first circular arc pipe 7 is disposed between the outer end pipe 8 and the end pipe 12, and the first circular arc pipe 7 is disposed outside the detection tank 1. In this embodiment, the detection tanks 1 are all vertically arranged, the tank covers are upward, and the air leakage outlet pipes 5 are all vertically extended into the blind plate sealing assembly from the side surfaces.

Referring to fig. 2 and 8, the inlet end of the leakage air outlet pipe 5 is provided with an outer end pipe 8, the outer end pipe 8 and the end pipe 12 extend in parallel and in the same direction, a second circular arc pipe 14 is disposed between the outer end pipe 8 and the end pipe 12, and the second circular arc pipe 14 is disposed outside the detection tank 1. In this embodiment, the detection tanks 1 are all vertically arranged, the tank covers are upward, and the air leakage eduction tubes 5 are all vertically extended into the blind plate sealing assembly from the top surface downwards. The second arc tube 14 is a semicircular arc and is provided outside the can lid.

Referring to fig. 3, 9, 11, 13 and 15, the inlet end of the leakage extraction pipe 5 is provided with an outer end pipe 8, the outer end pipe 8 and the end pipe 12 extend in parallel and in the same direction, and a straight pipe 15 vertically penetrating through the tank cover is arranged between the outer end pipe 8 and the end pipe 12. In this embodiment, the detection tank 1 is horizontally arranged, the tank cover faces the horizontal direction, the air leakage lead-out pipes 5 vertically extend into the blind plate sealing assembly downwards from the top surface, and the straight pipes 15 serve as connection functions and horizontally penetrate through the tank cover.

The detection blind plate components are of two types:

the first category of the first 9 cases shown in fig. 6 is applicable to various flanged and threaded safety valves 21 or valves with outlet diameters 8-150, in which case, in order to increase the sealing performance of the insertion of the leakage current pipe 5, the sealing performance test device further comprises a sealing plug 19 for small diameter openings, and the inlet end of the leakage current pipe 5 is arranged to be capable of being sealed and fixed on the sealing plug 19. The sealing plug 19 is a conical soft sealing silica gel plug, and is used for sealing the detected safety valve 21 or a valve outlet, and an opening is formed in the middle of the sealing plug 19 and can be inserted into the leakage gas eduction tube 5 so as to timely educe leakage gas medium.

The second type is the last case shown in fig. 6, and is applicable to a safety valve 21 or a valve having an outlet diameter larger than 150, in which case, in order to increase the sealing performance of the insertion of the leakage gas extraction pipe 5, the sealing performance test device further comprises a flange blind 20 for a large diameter opening, and a through hole capable of installing the sealing plug 19 is provided at the axial center position of the flange blind 20. In use, the sealing plug 19 is arranged after the flange blind plate 20 is fixed on the large-diameter opening. The flange blind plate 20 has the same diameter as the safety valve 21 and the valve outlet, is provided with a hole in the middle, is inserted with a cone-shaped silica gel material soft sealing plug 19 after the hole is formed, is connected with the leakage gas leading-out pipe 5, and leads out leakage gas medium.

In this embodiment, in order to increase the stability of the test tank 1, the sealing performance test device further includes a fixing plate 11, and the fixing plate 11 is sleeved and fixed on the inlet end of the leakage gas outlet pipe 5 and is tightly attached to the sealing plug 19 or the flange blind plate 20. The fixing plate 11 plays a role of fixing and supporting, and the fixing plate 11 and the sealing plug 19 or the flange blind plate 20 can be selectively adhered and fixed with the detection tank 1.

The sealing performance test device is suitable for the sealing performance test of the safety valve 21 and other various valves, has simple, visual and clear operation method and wide application range, can be brought to field work, and improves the detection efficiency. After water is injected into the detection tank 1 from the injector 25 through the water inlet check pipe 2, it can be detected that: sealing performance test of safety valve 21 or other various valves with upward outlet and horizontal flange surface; the sealing performance test of the safety valve 21 with parallel outlets and vertical flange surfaces or other various valves can also be detected.

The leakage air outlet pipe 5 is made of transparent pipe, and when there is leakage air at the safety valve 21 or the valve outlet, the water level line of the leakage air outlet pipe 5 inserted into the water within 13mm can be clearly seen to descend. When the degree of drop of the water line exceeds 13mm, the gas will leave the outlet of the gas leakage lead-out pipe 5, forming bubbles to float out of the water, at which time a test evaluation can be made by observing the number of bubbles to the tightness of the valve to be detected.

Taking a safety valve as an example, one detection method is as follows: the inlet of the safety valve 21 or the valve is installed on the air source equipment, and the air source equipment injects the sealing performance test air into the safety valve 21 or the valve and pressurizes the air to the rated sealing pressure. Under the rated sealing pressure, whether bubbles float out of the outlet of the leakage gas leading-out pipe 5 in the detection tank 1 is observed, and whether the sealing performance test of the safety valve is qualified is determined according to the number of the bubbles which float out per minute according to the standard requirement. The inner diameter of the leakage gas outlet pipe 5 used in the detection is 6mm, the water inlet depth is 13mm, and the leakage gas outlet pipe is designed according to the standard of GBT12243-2005 spring direct load type safety valve.

If the sealing performance test is carried out by using other various valves under the closing state, the leakage outlet pipe 5 with corresponding inner diameter or corresponding folded water depth is used according to the related standard requirement to determine whether the other various valves leak under the closing condition, and the sealing performance test of the valve is qualified according to the number of bubbles drifting out per minute.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims

1. The utility model provides a sealing performance test device, its characterized in that, sealing performance test device includes gas leakage extraction pipe (5), detects jar (1) and advances water and end return pipe (2), the upper end of detecting jar (1) is provided with the cover, gas leakage extraction pipe (5) with advance water and end return pipe (2) all follow the cover seals stretches into in detecting jar (1), gas leakage extraction pipe (5) are located detect the end in jar (1) be provided with detect the terminal pipe (12) of the bottom surface looks vertically of jar (1), be provided with export income water depth mark line (6) on terminal pipe (12), the export setting of intaking water end return pipe (2) is in export income water depth mark line (6) top.

2. The sealing performance test device according to claim 1, wherein an external thread interface (13) is arranged at the upper end of the detection tank (1), the tank cover comprises a middle hole cover (4) which can be sleeved on the external thread interface (13) in a threaded manner, the middle hole cover (4) is arranged to be capable of passing through the air leakage leading-out pipe (5) and the water inflow check pipe (2), a fixed base plate (9) and a sealing ring (10) are arranged between the external thread interface (13) and the middle hole cover (4), and the sealing ring (10) is arranged on one side close to the external thread interface (13).

3. The sealing performance test device according to claim 1, wherein an outlet of the water inlet check pipe (2) is provided with an inclined cutting surface which can be attached to the outer wall of the air leakage eduction pipe (5), and the inclined cutting surface is fixedly connected with the outer wall of the air leakage eduction pipe (5).

4. A sealing performance test device according to claim 3, characterized in that the outer end of the water inlet check pipe (2) is arranged perpendicular to the top surface of the tank cover, and the inner end (3) of the water inlet check pipe is arranged to be curved in a direction towards the leakage outlet pipe (5).

5. The sealing performance test device according to claim 1, wherein an inlet end of the leakage gas leading-out pipe (5) is provided with an outer end pipe (8), the outer end pipe (8) is perpendicular to the end pipe (12), a first circular arc pipe (7) is arranged between the outer end pipe (8) and the end pipe (12), and the first circular arc pipe (7) is arranged outside the detection tank (1).

6. The sealing performance test device according to claim 1, wherein an inlet end of the leakage gas leading-out pipe (5) is provided with an outer end pipe (8), the outer end pipe (8) is parallel to and extends in the same direction as the end pipe (12), a second circular arc pipe (14) is arranged between the outer end pipe (8) and the end pipe (12), and the second circular arc pipe (14) is arranged outside the detection tank (1).

7. The sealing performance test device according to claim 1, wherein an inlet end of the air leakage eduction tube (5) is provided with an outer end tube (8), the outer end tube (8) and the tail end tube (12) are parallel and extend in the same direction, and a straight tube (15) vertically penetrating through the tank cover is arranged between the outer end tube (8) and the tail end tube (12).

8. The sealing performance test device according to any one of claims 1-7, further comprising a sealing plug (19), wherein the inlet end of the blow-by gas outlet tube (5) is arranged to be capable of being sealingly penetrated and fixed on the sealing plug (19).

9. The sealing performance test device according to claim 8, further comprising a flange blind plate (20), wherein a through hole capable of installing the sealing plug (19) is provided at an axial center position of the flange blind plate (20).

10. The sealing performance test device according to claim 9, further comprising a fixing plate (11), wherein the fixing plate (11) is sleeved and fixed at the inlet end of the leakage outlet pipe (5) and is tightly attached to the sealing plug (19) or the flange blind plate (20).