Gas-phase and liquid-phase dual-purpose valve

Abstract

The utility model discloses a gas-liquid phase dual-purpose valve which comprises a valve body, a gas channel and a liquid channel are arranged in the valve body, two control valves used for controlling the gas channel and the liquid channel to be opened and closed respectively are arranged on the valve body, a pressure relief channel is further arranged on the valve body, and the pressure relief channel is communicated with the gas channel and the liquid channel through two groups of pressure relief holes respectively. A pressure relief valve is arranged in the pressure relief channel and comprises a pressing plate connected to the pressure relief channel in a threaded mode, a seat plate arranged in the pressure relief channel, two valve rods arranged on the seat plate, two valve elements arranged on the two valve rods in a sliding mode and springs arranged on the valve rods in a sliding mode. The valve element is in sliding sealing fit with the valve rod or the pressure relief holes are a plurality of small holes which can be blocked by the periphery of the valve element and are distributed in an annular array mode, after installation, the pressing plate tightly presses the base plate, the spring is compressed, the valve element blocks the pressure relief holes under the action of the spring, and a plurality of opposite through holes are formed in the base plate and the pressing plate. According to the pressure release valve, the two valve elements are arranged on the pressure release valve, each valve element is provided with one spring, the pressure generated when the two valve elements are passively opened can be independently set, and therefore high-pressure protection between gas and liquid phases is matched, and accidents are prevented.

Description

Technical Field

[0001] The utility model relates to a gas-liquid dual-purpose valve, in particular to a gas-liquid dual-purpose valve. Background Art

[0002] The gas-liquid two-phase cylinder valve is used on a cylinder to separately transport gas or liquid. The cylinder is suitable for storing industrial fluids including oxygen, freon, etc., and these industrial fluids exist in a gas-liquid mixed manner in the cylinder (generally, the gas-phase fluid is stored above the cylinder, and the liquid-phase fluid is stored below the cylinder). The gas-liquid two-phase cylinder valve can separately release pure gas-phase fluid and liquid-phase fluid through the gas-phase valve and the liquid-phase valve respectively.

[0003] The patent with the application number 201420551336.2 discloses a freon valve for gas-liquid use, which includes a valve body. The valve body is provided with a liquid output channel, a gas output channel, a liquid control mechanism for controlling the opening and closing of the liquid output channel, and a gas control mechanism for controlling the gas output channel. In addition, a safety pressure relief device is further provided on one side of the gas output channel. The safety pressure relief device includes a safety valve seat and an adjusting bolt which are oppositely arranged, and a spring sleeved between the safety valve seat and the adjusting bolt. The safety valve seat is in communication with the gas output channel.

[0004] The above patent is a two-phase valve, which only sets one safety pressure relief device on the valve body for pressure relief. However, two-phase valves are often used for the control of gas and liquid, and there is an obvious pressure difference between gas and liquid, and their safety pressures will also be different to some extent. When relieving pressure, it is necessary to set different relief pressures, but the safety pressure relief device in the above patent cannot set different relief pressures. Summary of the Utility Model

[0005] Based on the deficiency in the prior art that the relief pressures cannot be separately set during the transportation of gas and liquid, the utility model provides a gas-liquid dual-purpose valve.

[0006] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0007] The gas-liquid dual-purpose valve includes a valve body. A gas passage and a liquid passage are provided inside the valve body. Two control valves for controlling the opening and closing of the gas passage and the liquid passage respectively are provided on the valve body. A pressure relief passage is also provided on the valve body. The pressure relief passage is communicated with the gas passage and the liquid passage respectively through two groups of pressure relief holes. A pressure relief valve is provided in the pressure relief passage. The pressure relief valve includes a pressing plate threadedly connected to the pressure relief passage, a seat plate arranged in the pressure relief passage, two valve stems arranged on the seat plate, two valve cores slidably arranged on the two valve stems, and a spring slidably arranged on the valve stems. The valve core is in sliding and sealing fit with the valve stem or the pressure relief holes are several small holes distributed in an annular array that can be blocked by the periphery of the valve core. After installation, the pressing plate presses the seat plate tightly, the spring is compressed, and the valve core blocks the pressure relief holes under the action of the spring. Several opposite through holes are provided on the seat plate and the pressing plate.

[0008] Preferably, a limiting groove is further provided on the valve body, and a limiting post matching the shape of the limiting groove is provided on the seat plate. After installation, the limiting post extends into the limiting groove for limiting.

[0009] Preferably, the length of the limiting post is longer than the length of the valve stem. After installation, the limiting post abuts against the bottom of the limiting groove.

[0010] Preferably, a threaded section is provided at the outer end of the valve stem, and an adjusting piece is threadedly connected to the threaded section. The outer end of the spring abuts against the adjusting piece, and the adjusting piece is rotated to adjust the elastic force of the spring.

[0011] Preferably, the valve stem is fixedly connected to the seat plate; or the valve stem is threadedly connected to the seat plate.

[0012] Preferably, a limiting platform is provided at the inner end of the valve stem, and a receiving groove for the limiting platform to extend into is provided on the valve core.

[0013] Preferably, both the receiving groove and the limiting platform are of a cylindrical structure.

[0014] Preferably, the depth of the receiving groove is greater than the thickness of the limiting platform, and the diameter of the receiving groove is greater than or equal to the diameter of the limiting platform.

[0015] Preferably, the valve body is of a Y-shaped structure, and an exhaust joint and a liquid discharge joint are provided on two branch parts on its upper side.

[0016] Preferably, the pressure relief passage is arranged at the intersection of the two branch parts and is communicated with the intake passage at the front end of the control valve.

[0017] Compared with the prior art, the advantages of the present utility model are as follows: Two valve cores are provided on the pressure relief valve in this application, and each valve core is equipped with a spring, so that the pressures for the two valve cores to be opened passively can be set separately, thereby matching the high-pressure protection between the gas phase and the liquid phase and preventing accidents. Description of the Drawings

[0018] The present utility model will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 Is a perspective view of the present application;

[0020] Figure 2 Is a perspective view of the present application;

[0021] Figure 3 Is a sectional view of the present application;

[0022] Figure 4 Is an exploded view of the present application;

[0023] Figure 5 Is an exploded view of the present application;

[0024] Figure 6 Is an exploded view of the present application;

[0025] In the figure: 10, valve body; 101, gas passage; 102, liquid passage; 103, pressure relief hole; 104, pressure relief passage; 1041, limit groove; 20, control valve; 301, liquid discharge joint; 302, exhaust joint; 40, pressure relief valve; 401, outer cover; 402, pressing plate; 4031, seat plate; 4032, valve stem; 4033, valve core; 4034, limit platform; 4035, spring; 4036, limit post. Specific embodiments

[0026] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Those skilled in the art will understand that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present utility model.

[0027] It should be noted that: Similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0028] Embodiment 1

[0029] This embodiment mainly elaborates on the title of the gas-liquid dual-purpose valve, as follows:

[0030] Gas-liquid dual-purpose valve, referring to the attached Figures 1 - 6, including a valve body 10, a gas passage 101 and a liquid passage 102 are provided inside the valve body 10, two control valves 20 for controlling the opening and closing of the gas passage 101 and the liquid passage 102 respectively are provided on the valve body 10, a pressure relief passage 104 is further provided on the valve body 10, the pressure relief passage 104 is communicated with the gas passage 101 and the liquid passage 102 respectively through two groups of pressure relief holes 103, a pressure relief valve 40 is provided in the pressure relief passage 104, the pressure relief valve 40 includes a pressing plate 402 threadedly connected to the pressure relief passage 104, a seat plate 4031 provided in the pressure relief passage 104, two valve stems 4032 provided on the seat plate 4031, two valve cores 4033 slidably arranged on the two valve stems 4032 and a spring 4035 slidably arranged on the valve stem 4032, the valve core 4033 is in sliding seal fit with the valve stem 4032 or the pressure relief hole 103 is a number of small holes distributed in an annular array that can be blocked by the periphery of the valve core 4033, after installation, the pressing plate 402 presses the seat plate 4031 tightly, the spring 4035 is compressed, the valve core 4033 blocks the pressure relief hole 103 under the action of the spring 4035, and a number of opposite through holes are provided on the seat plate 4031 and the pressing plate 402. In this solution, two valve cores 4033 are provided on the pressure relief valve 40, and each valve core 4033 is equipped with a spring 4035, so that the pressures at which the two valve cores 4033 are opened passively can be set separately, so as to match the high-pressure protection between the gas phase and the liquid phase.

[0031] As Figure 4 shown, a limiting groove 1041 is further provided on the valve body 10, and a limiting post 4036 with a shape matching that of the limiting groove 1041 is provided on the seat plate 4031. After installation, the limiting post 4036 extends into the limiting groove 1041 for limiting. The limiting structure is used to cooperate with the seat plate 4031 to maintain the position accuracy of the valve installation, thereby improving the sealing stability during use.

[0032] As Figure 4 shown, the length of the limiting post 4036 is longer than the length of the valve stem 4032. After installation, the limiting post 4036 abuts against the bottom of the limiting groove 1041. The increased length is beneficial to improving its limiting effect. In addition, its positioning effect is also improved during installation.

[0033] As Figure 6 shown, a threaded section is provided at the outer end of the valve stem 4032, and an adjusting piece is threadedly connected to the threaded section. The outer end of the spring 4035 abuts against the adjusting piece, and the adjusting piece is rotated to adjust the elastic force of the spring 4035. In this solution, the pressure can be adjusted by rotating the adjusting piece. For example, when the elastic force of the spring 4035 decreases, compensation can be made by rotating the adjusting piece without replacement.

[0034] As Figure 6As shown, the valve stem 4032 is fixedly connected to the seat plate 4031. In this solution, the shape of the seat plate 4031 is preferably adapted to and slidably engaged with the side wall of the pressure relief passage 104; or the valve stem 4032 is threadedly connected to the seat plate 4031. The valve stem 4032 and the seat plate 4031 are arranged as a threaded connection structure, and the length can be finely adjusted during use. For example, when there is slight wear on the surface of the valve core 4033, the length of the valve stem 4032 extending out can be increased by screwing. In this solution, the thickness of the seat plate 4031 can be thickened.

[0035] Such as Figure 6 As shown, a limiting platform 4034 is provided at the inner end of the valve stem 4032, and a receiving groove for the limiting platform 4034 to extend into is provided on the valve core 4033; preferably, both the receiving groove and the limiting platform 4034 are cylindrical structures; preferably, the depth of the receiving groove is greater than the thickness of the limiting platform 4034, and the diameter of the receiving groove is greater than or equal to the diameter of the limiting platform 4034. The limiting platform 4034 is located in the receiving groove, and the valve core 4033 is slidably and sealingly engaged with the valve stem 4032, or the pressure relief holes 103 are arranged in a circular array distribution, and the pressure relief holes 103 are blocked through the peripheral area of the valve core 4033 during blocking, so as to avoid leakage.

[0036] Such as Figure 1 As shown, the valve body 10 is a Y-shaped structure, and an exhaust joint 302 and a drain joint 301 are provided on the two branch parts on its upper side.

[0037] Such as Figure 3 As shown, the pressure relief passage 104 is arranged at the intersection of the two branch parts and is communicated with the intake passage at the front end of the control valve 20.

[0038] Such as Figures 5 - 6 As shown, a mounting hole is provided in the middle of the pressing plate 402, and a detachable outer cover 401 is provided in the mounting hole.

[0039] The above has introduced in detail the title of the gas-liquid dual-purpose valve provided by the present utility model. Specific examples are used in this article to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the present utility model and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can still be made to the present utility model, and these improvements and modifications also fall within the protection scope of the claims of the present utility model.

Claims

1. A gas-liquid dual-purpose valve, comprising a valve body, a gas channel and a liquid channel are arranged in the valve body, two control valves are arranged on the valve body for controlling the opening and closing of the gas channel and the liquid channel respectively, a pressure relief channel is also arranged on the valve body, the pressure relief channel is connected with the gas channel and the liquid channel respectively through two groups of pressure relief holes, a pressure relief valve is arranged in the pressure relief channel, and the characteristics are as follows: The pressure relief valve includes a pressure plate threadedly connected to the pressure relief channel, a seat plate arranged in the pressure relief channel, two valve stems arranged on the seat plate, two valve cores slidably arranged on the two valve stems and a spring slidably arranged on the valve stem. The valve core and the valve stem are slidingly sealed or the pressure relief hole is a plurality of small holes distributed in an annular array that can be blocked by the periphery of the valve core. After installation, the pressure plate presses the seat plate, the spring is compressed, and the valve core blocks the pressure relief hole under the action of the spring. A plurality of relative through holes are provided on the seat plate and the pressure plate.

2. The gas-liquid dual-purpose valve according to claim 1, characterized in that: A limiting groove is also provided on the valve body, and a limiting column whose shape matches the limiting groove is provided on the seat plate. After installation, the limiting column extends into the limiting groove for limiting.

3. The gas-liquid dual-purpose valve according to claim 2, characterized in that: The length of the limiting column is longer than the length of the valve stem. After installation, the limiting column abuts against the bottom of the limiting groove.

4. The gas-liquid dual-purpose valve according to claim 1, characterized in that: A threaded section is provided at the outer end of the valve stem, an adjusting plate is threadedly connected at the threaded section, the outer end of the spring abuts against the adjusting plate, and the adjusting plate is rotated to adjust the elastic force of the spring.

5. The gas-liquid dual-purpose valve according to claim 1, characterized in that: The valve stem is fixedly connected to the seat plate; or the valve stem is threadedly connected to the seat plate.

6. The gas-liquid dual-purpose valve according to claim 1, characterized in that: A limit platform is arranged at the inner end of the valve stem, and an accommodating groove for the limit platform to extend into is arranged on the valve core.

7. The gas-liquid dual-purpose valve according to claim 6, characterized in that: The accommodating groove and the limiting platform are both cylindrical structures.

8. The gas-liquid dual-purpose valve according to claim 7, characterized in that: The depth of the accommodating groove is greater than the thickness of the limiting platform, and the diameter of the accommodating groove is greater than or equal to the diameter of the limiting platform.

9. The gas-liquid dual-purpose valve according to claim 1, characterized in that: The valve body is a Y-shaped structure, and the two branch parts on the upper side are provided with an exhaust joint and a liquid discharge joint.

10. The gas-liquid dual-purpose valve according to claim 9, characterized in that: The pressure relief passage is arranged at the intersection of the two branch parts, and is communicated with the air inlet passage at the front end of the control valve.

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