CN220982576U - Valve gas tightness detection device - Google Patents

Abstract

The utility model relates to the technical field of oxygen cylinder valves, in particular to a valve air tightness detection device. Comprises a frame; a water tank is arranged on the frame; the inflation tube is connected with a connecting tube; the connecting pipe is provided with a clamping component. In-process that valve body upwards overlaps in the seal tube outside, the sealing ring is kept away from the one end of connecting pipe axis and is supported and pressed on valve body inside wall to move up along with the valve body, push away the one end that the sealing ring kept away from the connecting pipe axis through frictional force and rotate and move up around the one end that the sealing ring is close to the connecting pipe axis, make the sealing ring deformation in order to seal the shutoff between connecting pipe lateral wall and the valve body inside wall, supplementary seal tube is sealed between with connecting pipe and the valve body, auxiliary structure makes the internal atmospheric pressure increase of valve, and increase the gas tightness between connecting pipe and the valve body, has reduced valve body and connecting pipe junction and has overflowed the bubble, and influence the probability of the detection of oxygen cylinder valve gas tightness.

Description

Valve gas tightness detection device

Technical Field

The utility model relates to the technical field of oxygen cylinder valves, in particular to a valve air tightness detection device.

Background

The valve is a normally open-close piece used when gas or liquid circulates, the valve for the oxygen bottle is arranged on the oxygen bottle, one end of the valve is connected with the oxygen bottle in a threaded manner, the other end of the valve is connected with oxygen equipment, and when the valve is used for guaranteeing to close, oxygen does not circulate, and when the valve is opened, oxygen circulates. The valve needs to be subjected to air tightness detection in the production process. The existing valve air tightness detection part adopts a water immersion method to detect, namely, an oxygen bottle valve is immersed in water, so that the valve is ensured to be in a closed state. And observing whether bubbles are generated around the valve, and if the bubbles are generated, indicating that gas leakage exists.

In the prior art, if the publication number is CN217032940U, the name is a chinese patent of an oxygen cylinder valve air tightness detection device, record in the public technical scheme, the valve that needs to detect is installed in the lower part of breather pipe, after closing the valve, ventilate to the valve through the air pump, then it has the bubble to observe in the detection water tank to immerse the valve, in order to guarantee the gas tightness of connection between breather pipe and the valve, be connected with the sealing washer between breather pipe and the valve, because the atmospheric pressure when detecting the oxygen cylinder valve air tightness is great, the gas tightness reduces between valve and the breather pipe because of atmospheric pressure change can appear in sealing washer department, make in the test process, gas overflows from valve and breather pipe junction and produces the bubble, thereby influence the detection of oxygen cylinder valve air tightness.

Disclosure of utility model

The utility model provides a valve air tightness detection device to solve the problems.

The utility model adopts the following technical scheme: a valve air tightness detection device comprises a frame; a water tank is arranged on the frame; an inflation tube is arranged above the water tank; one end of the inflation tube is plugged, and the other end of the inflation tube is connected with an inflation pump; the inflation tube is arranged on the frame in an up-and-down moving way through a hydraulic cylinder; the inflation tube is connected with a connecting tube; the connecting pipe is provided with a clamping component; the clamping assembly is used for clamping the valve body on the connecting pipe after the valve body is installed on the connecting pipe; a sealing component is arranged between the connecting pipe and the valve body;

The sealing assembly comprises a sealing cylinder, a sealing ring, a pushing column and an auxiliary structure; the sealing cylinder is coaxially sleeved outside the connecting pipe; the sealing cylinder is a rubber cylinder, and a rubber sealing ring is fixed at the upper end of the sealing cylinder; the sealing ring is a rubber ring and is coaxially sleeved on the outer side wall of the connecting pipe; the section of the sealing ring is in a fusiform shape, and one end close to the axis of the connecting pipe is fixed on the connecting pipe through a sleeve; one end of the sealing ring, which is far away from the axis of the connecting pipe, is lower than one end of the sealing ring, which is close to the axis of the connecting pipe; the connecting line distance between the two ends of the sealing ring is larger than the distance between the outer side wall of the connecting pipe and the inner side wall of the valve body, so that in the process that the valve body is sleeved on the outer side of the sealing cylinder upwards, one end of the sealing ring, which is far away from the axis of the connecting pipe, is propped against the inner side wall of the valve body, and moves upwards along with the valve body, one end of the sealing ring, which is far away from the axis of the connecting pipe, is pushed by friction force to rotate around one end, which is close to the axis of the connecting pipe, of the sealing ring, and moves upwards, so that the sealing ring deforms to seal the space between the outer side wall of the connecting pipe and the inner side wall of the valve body, and the auxiliary sealing cylinder seals the space between the connecting pipe and the valve body;

the pushing column is arranged below the sealing ring and is arranged on the connecting pipe in an up-down sliding manner;

The auxiliary structure is used for driving the push column to move upwards by a larger distance when the gas pressure of the gas filled tube is higher in the valve body, so that the push column pushes the sealing ring to encircle the rotating angle of one end of the sealing ring, which is close to the axis of the connecting cylinder, to be larger, and the sealing ring is larger, so that the sealing ring seals the space between the outer side wall of the connecting tube and the inner side wall of the valve body tightly. The air pressure in the valve body is increased, the air tightness between the connecting pipe and the valve body is increased, and the probability of detecting the air tightness of the oxygen cylinder valve due to overflow of air bubbles at the joint of the valve body and the connecting pipe is reduced.

Further, the auxiliary structure includes an auxiliary ring; the auxiliary ring is coaxially fixed at the lower end of the connecting pipe; a plurality of auxiliary cavities are uniformly distributed in the auxiliary ring along the circumferential direction of the auxiliary ring; the auxiliary cavity is provided with a vertically arranged baffle plate, and the baffle plate divides the auxiliary cavity into an outer cavity and an inner cavity; the outer cavity is arranged far away from the axis of the auxiliary ring; the inner cavity is arranged close to the axis of the auxiliary ring; the inner cavity and the outer cavity are communicated with each other at the lower end of the partition board; the inner cavity opening is arranged towards the axis of the connecting pipe; an inner piston plate is arranged in the inner cavity along the radial sliding way of the auxiliary ring; the inner piston plate is fixedly connected with a bearing plate through a connecting rod; the bearing plate is in sliding fit with the auxiliary ring; an outer piston plate is axially and slidably arranged in the outer cavity along the auxiliary ring; the upper end surface of the outer piston plate is fixedly connected with the push column; air is sealed between the outer piston plate and the inner piston plate. After the valve body is installed, the valve body is inflated through the inflation tube and the connecting tube, the air pressure in the connecting tube is gradually increased, the bearing plate is pushed to slide away from the axis of the connecting tube, the inner piston plate pushes the outer piston plate to drive the push column to move upwards, and the push column pushes the sealing ring to provide deformation pushing force for sealing the gap between the connecting tube and the valve body for the sealing ring.

Further, the outer side wall of the sealing cylinder is a conical wall with a downward small end. The valve body is conveniently sleeved outside the sealing cylinder in an upward moving way.

Further, the clamping assembly includes a clamping plate; the clamping plate is arranged below the connecting pipe; the clamping plate is rotatably provided with a clamping rod which is vertically arranged; the lower end of the clamping rod is rotatably arranged on the clamping plate, and the upper end of the clamping rod is in threaded fit with the connecting pipe through the connecting plate. When the valve is used, the valve body is sleeved outside the sealing cylinder, and then the clamping rod is rotated to drive the clamping plate to move upwards so as to lower the valve body to be propped against the sealing ring.

Further, a plurality of connecting pipes are connected to the air charging pipe. The air tightness test of a plurality of valve bodies can be simultaneously carried out at multiple stations during the test.

Further, the connecting pipe is provided with an on-off valve. For controlling the aeration of the station for the tightness test.

Further, the connecting pipes are provided with pressure gauges. The pressure change in the valve body is conveniently observed in the pressure maintaining stage, and the air tightness of the valve body is assisted to be judged.

The beneficial effects of the utility model are as follows: in-process that valve body upwards overlaps in the seal tube outside, the sealing ring is kept away from the one end of connecting pipe axis and is supported and pressed on valve body inside wall to move up along with the valve body, push away the one end that the sealing ring kept away from the connecting pipe axis through frictional force and rotate and move up around the one end that the sealing ring is close to the connecting pipe axis, make the sealing ring deformation in order to seal the shutoff between connecting pipe lateral wall and the valve body inside wall, supplementary seal tube is sealed between with connecting pipe and the valve body, auxiliary structure makes the internal atmospheric pressure increase of valve, and increase the gas tightness between connecting pipe and the valve body, has reduced valve body and connecting pipe junction and has overflowed the bubble, and influence the probability of the detection of oxygen cylinder valve gas tightness.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a valve tightness detecting device according to the present utility model;

FIG. 2 is a front view of an embodiment of the present utility model;

FIG. 3 is a schematic view of a clamping assembly, valve body, according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a clamp assembly, valve body, of an embodiment of the present utility model;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 is a schematic view of a clamping assembly, a seal assembly, according to an embodiment of the present utility model.

In the figure: 100. a frame; 200. a water tank; 300. an inflation tube; 310. a connecting pipe; 320. an on-off valve; 330. a pressure gauge; 400. a clamping assembly; 410. a clamping plate; 420. a clamping rod; 500. a seal assembly; 510. a sealing cylinder; 520. a seal ring; 530. a seal ring; 540. a sleeve; 550. pushing a column; 561. an auxiliary ring; 562. a partition plate; 565. an outer piston plate; 566. an inner piston plate; 600. a valve body.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the like or similar elements throughout or elements having the same or similar functions. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The features of the utility model "first", "second" and the like in the description and in the claims may be used for the explicit or implicit inclusion of one or more such features. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

An embodiment of a valve air tightness detection device of the present utility model is shown in fig. 1 to 6: a valve air tightness detection device comprises a frame 100; the frame 100 is provided with a water tank 200; the water tank 200 is made of transparent material. An air charging pipe 300 is arranged above the water tank 200; one end of the air inflation tube 300 is plugged, and the other end is connected with an air inflation pump; the air charging pipe 300 is arranged on the frame 100 in an up-and-down moving way through a hydraulic cylinder; the inflation tube 300 is connected with a connecting tube 310; the connecting pipe 310 is provided with a clamping assembly 400; the clamping assembly 400 is used for clamping the valve body 600 on the connection pipe 310 after the valve body 600 is mounted on the connection pipe 310; a sealing assembly 500 is provided between the connection pipe 310 and the valve body 600;

Seal assembly 500 includes a seal cartridge 510, a seal ring 530, a push post 550, and an auxiliary structure; the sealing cylinder 510 is coaxially sleeved outside the connecting pipe 310; the sealing cylinder 510 is a rubber cylinder, and a rubber sealing ring 520 is fixed at the upper end of the sealing cylinder; the outer side wall of the seal cartridge 510 is a tapered wall with a small end facing downward. For facilitating the upward movement of the valve body 600 around the outside of the sealing cylinder 510. The sealing ring 530 is a rubber ring coaxially sleeved on the outer side wall of the connecting pipe 310; the sealing ring 530 has a shuttle-shaped cross section, and one end close to the axis of the connecting pipe 310 is fixed on the connecting pipe 310 through a sleeve 540; the end of sealing ring 530 away from the axis of connecting tube 310 is lower than the end of sealing ring 530 near the axis of connecting tube 310; the connecting line distance between the two ends of the sealing ring 530 is larger than the interval between the outer side wall of the connecting pipe 310 and the inner side wall of the valve body 600, so that in the process that the valve body 600 is sleeved on the outer side of the sealing cylinder 510 upwards, one end of the sealing ring 530, which is far away from the axis of the connecting pipe 310, is propped against the inner side wall of the valve body 600, and along with the upward movement of the valve body 600, one end of the sealing ring 530, which is far away from the axis of the connecting pipe 310, is pushed by friction force to rotate around one end of the sealing ring 530, which is close to the axis of the connecting pipe 310, and moves upwards, so that the sealing ring 530 deforms to seal the sealing between the outer side wall of the connecting pipe 310 and the inner side wall of the valve body 600, and the auxiliary sealing cylinder 510 seals between the connecting pipe 310 and the valve body 600;

The push column 550 is provided below the sealing ring 530 and is provided on the connection pipe 310 to slide up and down; the auxiliary structure includes an auxiliary ring 561; the auxiliary ring 561 is coaxially fixed to the lower end of the connection pipe 310; a plurality of auxiliary cavities are uniformly distributed in the auxiliary ring 561 along the circumferential direction of the auxiliary ring 561; the auxiliary cavity is provided with a baffle plate 562 which is vertically arranged, and the baffle plate 562 divides the auxiliary cavity into an outer cavity and an inner cavity; the outer cavity is located away from the auxiliary ring 561 axis; the lumen is disposed adjacent to the auxiliary ring 561 axis; the inner cavity and the outer cavity are communicated at the lower end of the baffle 562; the lumen opening is disposed toward the connecting tube 310 axis; an inner piston plate 566 is slidably mounted radially within the inner chamber along the auxiliary ring 561; the inner piston plate 566 is fixedly connected with a bearing plate through a connecting rod; the bearing plate is in sliding fit with the auxiliary ring 561; an outer piston plate 565 is axially slidably mounted within the outer chamber along the auxiliary ring 561; the upper end surface of the outer piston plate 565 is fixedly connected with the push column 550; air is sealed between the outer piston plate 565 and the inner piston plate 566. After the valve body 600 is installed, the valve body 600 is inflated through the inflation tube 300 and the connecting tube 310, the air pressure in the connecting tube 310 is gradually increased, the bearing plate is pushed to slide away from the axis of the connecting tube 310, the inner piston plate 566 pushes the outer piston plate 565 to drive the push column 550 to move upwards, and the push column 550 pushes the sealing ring 530 to provide deformation pushing force for sealing the gap between the connecting tube 310 and the valve body 600 for the sealing ring 530. When the gas pressure of the gas tube 300 flowing into the valve body 600 is larger, the auxiliary structure drives the push column 550 to move upwards by a larger distance, so that the push column 550 pushes the sealing ring 530 to rotate around one end of the sealing ring 530, which is close to the axis of the connecting tube, by a larger angle, so that the deformation amount of the sealing ring 530 is larger, and the sealing ring 530 seals the outer side wall of the connecting tube 310 and the inner side wall of the valve body 600 tightly. That is, the air pressure in the valve body 600 is increased, the air tightness between the connecting pipe 310 and the valve body 600 is increased, and the probability of influencing the detection of the air tightness of the oxygen cylinder valve due to overflow of air bubbles at the joint of the valve body 600 and the connecting pipe 310 is reduced.

In this embodiment, the clamping assembly 400 includes a clamping plate 410; the clamping plate 410 is disposed below the connection pipe 310; the clamping plate 410 is rotatably provided with a vertically arranged clamping rod 420; the clamping lever 420 is rotatably mounted at a lower end thereof to the clamping plate 410, and is screw-engaged at an upper end thereof with the connection pipe 310 by the connection plate. In use, after the valve body 600 is sleeved outside the sealing cylinder 510, the clamping rod 420 is rotated to drive the clamping plate 410 to move upwards so as to lower the valve body 600 to be pressed against the sealing ring 520.

In the present embodiment, a plurality of connection pipes 310 are connected to the gas tube 300. For testing, the air tightness test of a plurality of valve bodies 600 can be simultaneously performed at multiple stations. The connection pipe 310 is provided with an on-off valve 320. For controlling the aeration of the station for the tightness test. The connecting pipes 310 are provided with pressure gauges 330. The pressure change in the valve body 600 is conveniently observed in the pressure maintaining stage, and the air tightness of the valve body 600 is assisted to be judged.

In combination with the above embodiment, the use principle and working process of the present utility model are as follows: after the valve body 600 is sleeved outside the sealing cylinder 510, the clamping rod 420 is rotated to drive the clamping plate 410 to move upwards so as to lower the valve body 600 to be pressed against the sealing ring 520.

After the valve body 600 is installed, the hydraulic cylinder drives the valve body 600 to move down into the water tank 200. The inflator inflates the valve body 600 through the inflation tube 300 and the connection tube 310. The air pressure in the connecting pipe 310 is gradually increased, the bearing plate is pushed to slide away from the axis of the connecting pipe 310, so that the inner piston plate 566 pushes the outer piston plate 565 to drive the push column 550 to move upwards, and the push column 550 pushes the sealing ring 530 to provide the sealing ring 530 with a deformed pushing force for plugging the gap between the connecting pipe 310 and the valve body 600. The greater the gas pressure of the gas tube 300 flowing into the valve body 600, the greater the upward moving distance of the pushing column 550 is, so that the greater the angle that the pushing column 550 pushes the sealing ring 530 to rotate around one end of the sealing ring 530, which is close to the axis of the connecting tube, the greater the deformation amount of the sealing ring 530 is, and the tighter the sealing ring 530 seals the outer side wall of the connecting tube 310 and the inner side wall of the valve body 600. That is, the air pressure in the valve body 600 is increased, the air tightness between the connecting pipe 310 and the valve body 600 is increased, and the probability of influencing the detection of the air tightness of the oxygen cylinder valve due to overflow of air bubbles at the joint of the valve body 600 and the connecting pipe 310 is reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (7)

1. The utility model provides a valve gas tightness detection device which characterized in that: comprises a frame (100); a water tank (200) is arranged on the frame (100); an air charging pipe (300) is arranged above the water tank (200); the air charging pipe (300) is arranged on the frame (100) in a vertically movable way; the inflation tube (300) is connected with a connecting tube (310); the connecting pipe (310) is provided with a clamping component (400); the clamping assembly (400) is used for clamping the valve body (600) on the connecting pipe (310) after the valve body (600) is installed on the connecting pipe (310); a sealing component (500) is arranged between the connecting pipe (310) and the valve body (600);

The sealing assembly (500) comprises a sealing cylinder (510), a sealing ring (530), a push column (550) and an auxiliary structure; the sealing cylinder (510) is coaxially sleeved outside the connecting pipe (310); the sealing cylinder (510) is a rubber cylinder, and a rubber sealing ring (520) is fixed at the upper end of the sealing cylinder; the sealing ring (530) is a rubber ring and is coaxially sleeved on the outer side wall of the connecting pipe (310); the cross section of the sealing ring (530) is in a shuttle shape, and one end close to the axis of the connecting pipe (310) is fixed on the connecting pipe (310) through a sleeve (540); one end of the sealing ring (530) far away from the axis of the connecting pipe (310) is lower than one end of the sealing ring (530) near to the axis of the connecting pipe (310); the connecting line distance between the two ends of the sealing ring (530) is larger than the distance between the outer side wall of the connecting pipe (310) and the inner side wall of the valve body (600);

The pushing column (550) is arranged below the sealing ring (530) and is arranged on the connecting pipe (310) in an up-and-down sliding way;

The auxiliary structure is used for driving the push column (550) to move upwards by a larger distance when the gas pressure of the gas charging tube (300) is higher towards the valve body (600), so that the push column (550) pushes the sealing ring (530) to rotate around one end of the sealing ring (530) close to the axis of the connecting tube by a larger angle, the deformation amount of the sealing ring (530) is larger, and the sealing ring (530) seals the outer side wall of the connecting tube (310) and the inner side wall of the valve body (600) tightly.

2. The valve tightness detection device according to claim 1, wherein: the auxiliary structure comprises an auxiliary ring (561); the auxiliary ring (561) is coaxially fixed at the lower end of the connecting pipe (310); a plurality of auxiliary cavities are uniformly distributed in the auxiliary ring (561) along the circumferential direction of the auxiliary ring (561); the auxiliary cavity is provided with a baffle plate (562) which is vertically arranged, and the baffle plate (562) divides the auxiliary cavity into an outer cavity and an inner cavity; the outer cavity is arranged away from the axis of the auxiliary ring (561); the inner cavity is arranged close to the axis of the auxiliary ring (561); the inner cavity and the outer cavity are communicated at the lower end of the baffle plate (562); the inner cavity opening is arranged towards the axis of the connecting pipe (310); an inner piston plate (566) is slidably mounted radially within the inner chamber along the auxiliary ring (561); the inner piston plate (566) is fixedly connected with a bearing plate through a connecting rod; the bearing plate is in sliding fit with the auxiliary ring (561); an outer piston plate (565) is axially slidably mounted within the outer chamber along the auxiliary ring (561); the upper end surface of the outer piston plate (565) is fixedly connected with the push column (550); air is sealed between the outer piston plate (565) and the inner piston plate (566).

3. The valve tightness detection device according to claim 2, wherein: the outer side wall of the sealing cylinder (510) is a conical wall with a downward small end.

4. The valve tightness detection device according to claim 1, wherein: the clamping assembly (400) includes a clamping plate (410); the clamping plate (410) is arranged below the connecting pipe (310); a clamping rod (420) which is arranged vertically is rotatably arranged on the clamping plate (410); the lower end of the clamping rod (420) is rotatably arranged on the clamping plate (410), and the upper end of the clamping rod is in threaded fit with the connecting pipe (310) through the connecting plate.

5. A valve tightness detection device according to any of claims 1-4, characterized in that: the inflation tube (300) is connected with a plurality of connection tubes (310).

6. The valve tightness detection device according to claim 5, wherein: the connecting pipe (310) is provided with an on-off valve (320).

7. The valve tightness detection device according to claim 6, wherein: the connecting pipes (310) are provided with pressure gauges (330).