Three-way valve for high-pressure gas storage tank

Abstract

The invention belongs to the field of valves, and particularly relates to a three-way valve for a high-pressure gas storage tank, which comprises a valve body, the lower part of the valve body is provided with a valve seat, the upper part of the valve body is provided with a valve cover, and the valve body is internally provided with a valve cavity; the channel mechanism comprises a first flange plate, a second flange plate and a third flange plate, the first flange plate and the second flange plate are formed at the two ends of the valve body, and the third flange plate is formed on the lower portion of the valve seat. A valve plug mechanism in a valve cavity is improved, the valve plug mechanism comprises an upper valve plug and a lower valve plug which are symmetrically arranged, the upper valve plug and the lower valve plug are used for blocking a second channel and a third channel respectively, a fixed design and a non-fixed design are adopted between the two, and when the positions of the upper valve plug and the lower valve plug in the valve cavity are adjusted, the channel transmission state of the three-way valve can be rapidly switched; and when sealing is needed, stable sealing at other channels is still kept, gas leakage during channel transmission state switching is prevented, and the device can adapt to various application scenes.

Description

Technical Field

[0001] The invention relates to the field of valves, and in particular to a three-way valve used for a high-pressure gas storage tank. Background Art

[0002] High-pressure gas storage tanks can store a large amount of compressed air. When gas-using equipment needs a large amount of gas, the storage tank can quickly release the stored gas to meet the needs of the gas-using equipment. The three-way valve is a valve used to control the flow direction of gas, usually composed of a valve body, a valve and an actuator. When the actuator sends a signal, the valve will open or close accordingly, thereby changing the flow direction and flow rate of the gas. Gas three-way valves are widely used in control fields such as gas mixing, diversion and steering. The gas stored in the high-pressure gas storage tank is transmitted to the gas-using equipment connected to the pipeline through the three-way valve for gas distribution.

[0003] The existing three-way valve plug structure is mostly an integrated design, which can only perform single-channel switching, making it difficult to transmit gas with the channel fully open. In addition, gas leakage is prone to occur when the channel is switched, which is a disadvantage. Summary of the invention

[0004] (I) Purpose of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a three-way valve for a high-pressure gas storage tank, which has the characteristics of convenient channel switching and controllable gas transmission flow rate.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a three-way valve for a high-pressure gas storage tank, comprising a valve body, a valve seat is installed at the lower part of the valve body, a valve cover is installed at the upper part of the valve body, and a valve cavity is opened inside the valve body;

[0008] The channel mechanism comprises a first flange, a second flange and a third flange, wherein the first flange and the second flange are formed at both ends of the valve body, and the third flange is formed at the lower part of the valve seat, and the first channel, the second channel and the third channel connected to the valve cavity are respectively opened in the three flanges;

[0009] A driving device is arranged on the upper part of the valve cover, and the valve plug mechanism comprises a connecting rod connected to the output end of the driving device, and the other end of the connecting rod is connected to a valve stem penetrating the valve body, and an upper valve plug and a lower valve plug are symmetrically sleeved on the outer wall of the valve stem;

[0010] The distance adjustment mechanism comprises a cylinder mounted on the upper valve plug, a movable piston rod is mounted on the output end of the cylinder, a rod seat is formed on the other end of the piston rod, and the rod seat is connected to the lower valve plug through a traction rod.

[0011] Preferably, the upper valve plug is fixedly mounted on the outer periphery of the valve stem, and the lower valve plug is movably mounted on the outer periphery of the valve stem, and the two have the same specifications and opposite mounting directions.

[0012] Preferably, the upper valve plug is close to a channel connecting the first channel and the second channel, and the lower valve plug is close to a channel connecting the first channel and the third channel.

[0013] Preferably, the channel connecting the first channel and the second channel is an upwardly concave "cone" structure, and the upper valve plug is adapted to the cone structure.

[0014] Preferably, the channel connecting the first channel and the third channel is a columnar structure penetrating downward, the upper section of the channel is matched with the upper part of the lower valve plug, and the middle section of the channel is matched with the lower part of the lower valve plug.

[0015] Preferably, when the positions of the upper valve plug and the lower valve plug in the valve cavity are adjusted, the valve body includes at least four channel transmission states.

[0016] Preferably, at least one set of distance adjustment mechanisms is provided and installed between the upper valve plug and the lower valve plug.

[0017] Preferably, the lower valve plug is connected to the rod seat via the internal traction rod, and the movable stroke of the lower valve plug is the same as the movable stroke of the piston rod.

[0018] Preferably, the supporting mechanism comprises a clamping ring sleeved on the outer periphery of the valve stem and a support ring installed on the inner wall of the upper valve plug, and a stretchable spring member is clamped between the clamping ring and the support ring.

[0019] Preferably, the same supporting mechanism is installed in the lower valve plug, the difference being that the clamping ring matched with the lower valve plug is also movably sleeved on the outer periphery of the valve stem.

[0020] The above technical solution of the present invention has the following beneficial technical effects:

[0021] 1. Improve the valve plug mechanism in the valve cavity, including symmetrically arranged upper and lower valve plugs, which are used to block the second channel and the third channel respectively, and the two adopt a fixed design and a non-fixed design respectively. When the upper and lower valve plugs are adjusted in position in the valve cavity, the channel transmission state of the three-way valve can be quickly switched, and stable sealing can be maintained at other channels when sealing is required, preventing gas leakage when the channel transmission state is switched, which can adapt to a variety of application scenarios.

[0022] 2. When gas needs to be supplied to different gas-consuming equipment, the gas supply rate of different channels can be adjusted according to the gas demand of the gas-consuming equipment to increase the gas transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 It is a schematic diagram of the closed structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the second channel opening structure of the present invention;

[0026] Figure 4 This is a schematic diagram of the third channel opening structure of the present invention;

[0027] Figure 5 It is a schematic diagram of the valve plug mechanism structure of the present invention;

[0028] Figure 6 This is a schematic diagram of the opening structure of the second channel and the third channel of the present invention;

[0029] Figure 7 This is a schematic diagram of the planar structure of the second channel and the third channel of the present invention.

[0030] Reference numerals:

[0031] 11. Valve body; 12. Valve seat; 13. Valve cover; 14. Valve chamber; 21. First flange; 22. First channel; 23. Second flange; 24. Second channel; 25. Third flange; 26. Third channel; 3. Driving device; 41. Connecting rod; 42. Valve stem; 43. Upper valve plug; 44. Lower valve plug; 51. Cylinder; 52. Piston rod; 53. Rod seat; 54. Traction rod; 61. Clamp ring; 62. Support ring; 63. Spring member. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0033] like Figure 1-7 As shown, the three-way valve for a high-pressure gas storage tank proposed by the present invention comprises a valve body 11, a valve seat 12 is installed at the lower part of the valve body 11, a valve cover 13 is installed at the upper part of the valve body 11, and a valve cavity 14 is opened inside the valve body 11;

[0034] The channel mechanism includes a first flange 21, a second flange 23 and a third flange 25. The first flange 21 and the second flange 23 are formed at both ends of the valve body 11, and the third flange 25 is formed at the lower part of the valve seat 12. The first channel 22, the second channel 24 and the third channel 26 connected to the valve cavity 14 are respectively opened in the three flanges.

[0035] The upper part of the valve cover 13 is provided with a driving device 3, and the valve plug mechanism includes a connecting rod 41 connected to the output end of the driving device 3, and the other end of the connecting rod 41 is connected to a valve stem 42 that penetrates the valve body 11, and the outer wall of the valve stem 42 is symmetrically sleeved with an upper valve plug 43 and a lower valve plug 44;

[0036] The distance adjustment mechanism includes a cylinder 51 installed on the upper valve plug 43 , a movable piston rod 52 is installed at the output end of the cylinder 51 , a rod seat 53 is formed at the other end of the piston rod 52 , and the rod seat 53 is connected to the lower valve plug 44 through a traction rod 54 .

[0037] It should be noted that:

[0038] 1. The upper valve plug 43 is fixedly installed on the periphery of the valve stem 42, and the lower valve plug 44 is movably installed on the periphery of the valve stem 42. The two have the same specifications and are installed in opposite directions. When the channels of the valve cavity 14 inside the valve body 11 are switched on and off, the valve plug 43 is adjusted in position along with the valve stem 42 to switch the channels of the valve cavity 14 on and off. The corresponding lower valve plug 44 can be moved synchronously with the valve stem 42 to make a preliminary adjustment in position, and can also be adjusted in position on the periphery of the valve stem 42 through the operation of the distance adjustment mechanism.

[0039] 2. The upper valve plug 43 is close to the channel connecting the first channel 22 and the second channel 24. Since the channel connecting the first channel 22 and the second channel 24 is an upwardly concave "cone" structure, the upper valve plug 43 is adapted to the "cone" structure. When the upper valve plug 43 is completely embedded in the "cone" structure, the channel connecting the first channel 22 and the second channel 24 is completely closed, and the second channel 24 is in a closed state.

[0040] The lower valve plug 44 is close to the channel connecting the first channel 22 and the third channel 26. The channel connecting the first channel 22 and the third channel 26 is a downward-through cylindrical structure, the upper section of which is matched with the upper portion of the lower valve plug 44, and the middle portion of which is matched with the lower portion of the lower valve plug 44. When the upper portion of the lower valve plug 44 is attached to the upper opening of the third channel 26, the third channel 26 is in a closed state. When the second channel 24 needs to be opened, the bottom of the lower valve plug 44 is close to the middle portion of the third channel 26.

[0041] In this embodiment, the valve plug mechanism in the valve cavity 14 is improved, including an upper valve plug 43 and a lower valve plug 44 symmetrically arranged, which are used to block the second channel 24 and the third channel 26 respectively, and a fixed design and a non-fixed design are respectively adopted between the two. When the positions of the upper valve plug 43 and the lower valve plug 44 are adjusted in the valve cavity 14, the valve body 11 includes at least four channel transmission states;

[0042] When the second channel 24 and the third channel 26 need to be closed, the upper valve plug 43 is embedded in the "cone" structure that is concave upward at the connection between the first channel 22 and the second channel 24, and the outer periphery of the lower valve plug 44 is always kept in contact with the upper opening of the third channel 26. The second channel 24 and the third channel 26 are closed by the upper and lower valve plugs, thereby preventing the gas stored in the high-pressure gas storage tank from leaking out.

[0043] When the second channel 24 needs to be opened, the driving device 3 drives the valve stem 42 connected to the connecting rod 41 to be pressed downward, driving the upper valve plug 43 and the lower valve plug 44 to be pressed downward as a whole. At this time, the upwardly concave "cone" structure of the connection between the first channel 22 and the second channel 24 blocked by the upper valve plug 43 is in an open state, and the contact end surface of the lower valve plug 44 and the third channel 26 is still in a sealed state, so that the gas stored in the high-pressure gas storage tank is transmitted to the gas-using equipment through the first channel 22 and the second channel 24;

[0044] When the third channel 26 needs to be opened, the upper valve plug 43 maintains its initial position, the second channel 24 is in a closed state, the distance adjustment mechanism works, the cylinder 51 drives the piston rod 52 at the output end to contract, and drives the lower valve plug 44 connected to the rod seat 53 and the traction rod 54 to move upward along the valve stem 42. At this time, the upper opening of the third channel 26 is exposed, and the gas stored in the high-pressure gas storage tank is transmitted to the gas-using equipment through the first channel 22 and the third channel 26;

[0045] When it is necessary to supply gas to multiple gas-consuming devices at the same time, the second channel 24 and the third channel 26 can be opened at the same time. First, the upper valve plug 43 is pressed down to expose the ventilation gap between the first channel 22 and the second channel 24. At this time, the lower valve plug 44 is moved closer to the upper valve plug 43 through the adjustment mechanism to expose the ventilation gap between the first channel 22 and the third channel 26. At this time, the gas stored in the high-pressure gas storage tank is transmitted to different gas-consuming devices through the second channel 24 and the third channel 26.

[0046] Through the cooperation of the valve plug mechanism and the distance adjustment mechanism, the channel transmission state of the three-way valve can be quickly switched according to the use requirements. When switching the channel transmission state, other channels still maintain stable sealing when sealing is required, preventing gas leakage when the channel transmission state is switched, which can adapt to a variety of application scenarios.

[0047] It can be understood that in order to ensure the stability of the movement of the lower valve plug 44, at least one set of distance adjustment mechanisms is set and installed between the upper valve plug 43 and the lower valve plug 44. The piston rod 52 is driven by two sets of cylinders 51 to ensure the balance of the lower valve plug 44 during movement.

[0048] As an example of distance adjustment: the lower valve plug 44 is connected to the rod seat 53 through an internal traction rod 54, and the movable stroke of the lower valve plug 44 is the same as the movable stroke of the piston rod 52. The distance between the lower valve plug 44 connected to the traction rod 54 and the upper valve plug 43 is controlled by lifting and lowering the piston rod 52.

[0049] In one embodiment, when it is necessary to supply gas to different gas-consuming devices, the gas supply rate can be adjusted according to the gas demand of the gas-consuming devices. First, the valve stem 42 connected to the connecting rod 41 is driven downward by the driving device 3 to move the upper valve plug 43 to the middle of the valve chamber 14. At this time, the cylinder 51 drives the traction rod 54 connected to the rod seat 53 at the bottom of the piston rod 52 to lift upward, and the lower valve plug 44 moves to the upper valve plug 43 until the two are attached. At this time, the gas supply rates of the second channel 24 and the third channel 26 are the same;

[0050] When the gas supply equipment connected to the second channel 24 needs to improve the gas supply efficiency, the valve stem 42 is pressed down again to drive the upper valve plug 43 and the lower valve plug 44 to move downward. When the third channel 26 is kept open, the opening range at the entrance of the second channel 24 is increased to increase the gas transmission efficiency.

[0051] When the gas supply equipment connected to the third channel 26 needs to improve the gas supply efficiency, the valve stem 42 is lifted upward again, driving the upper valve plug 43 and the lower valve plug 44 to move upward. While keeping the second channel 24 open, the opening range at the entrance of the third channel 26 is increased to increase the gas transmission efficiency.

[0052] like Figure 5 As shown, the support mechanism includes a clamp ring 61 sleeved on the outer periphery of the valve stem 42 and a support ring 62 installed on the inner wall of the upper valve plug 43, and a stretchable spring member 63 is clamped between the clamp ring 61 and the support ring 62.

[0053] Among them, the purpose of the support mechanism design is that when the upper valve plug 43 is embedded in the upward concave "conical cone" structure connecting the first channel 22 and the second channel 24, the spring member 63 is stretched outward, and the outer wall of the upper valve plug 43 is tightly attached to the inner wall of the channel of the "conical cone" structure to prevent gas penetration.

[0054] It can be understood that the same supporting mechanism is installed in the lower valve plug 44. The difference is that the clamping ring 61 that matches the lower valve plug 44 is also movably mounted on the outer periphery of the valve stem 42. The clamping ring 61 can slide up and down along the outer periphery of the valve stem 42 to adjust its position. When the position of the lower valve plug 44 moves, it is also stretched outward by the spring member 63 to tightly attach the outer wall of the lower valve plug 44 to the inner wall of the third channel 26.

[0055] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A three-way valve for a high-pressure gas storage tank, characterized in that: It comprises a valve body (11), a valve seat (12) is installed at the lower part of the valve body (11), a valve cover (13) is installed at the upper part of the valve body (11), and a valve cavity (14) is opened inside the valve body (11); The channel mechanism comprises a first flange (21), a second flange (23) and a third flange (25), wherein the first flange (21) and the second flange (23) are formed at both ends of the valve body (11), and the third flange (25) is formed at the lower part of the valve seat (12), and the first channel (22), the second channel (24) and the third channel (26) connected to the valve cavity (14) are respectively provided in the three flanges; A driving device (3) is arranged on the upper part of the valve cover (13); the valve plug mechanism comprises a connecting rod (41) connected to the output end of the driving device (3); the other end of the connecting rod (41) is connected to a valve stem (42) penetrating the valve body (11); an upper valve plug (43) and a lower valve plug (44) are symmetrically sleeved on the outer wall of the valve stem (42); The distance adjustment mechanism comprises a cylinder (51) mounted on the upper valve plug (43); a movable piston rod (52) is mounted on the output end of the cylinder (51); a rod seat (53) is formed on the other end of the piston rod (52); and the rod seat (53) is connected to the lower valve plug (44) via a traction rod (54).

2. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The upper valve plug (43) is fixedly mounted on the outer periphery of the valve stem (42), and the lower valve plug (44) is movably mounted on the outer periphery of the valve stem (42). The two have the same specifications and are mounted in opposite directions.

3. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The upper valve plug (43) is close to a channel connecting the first channel (22) and the second channel (24), and the lower valve plug (44) is close to a channel connecting the first channel (22) and the third channel (26).

4. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The channel connecting the first channel (22) and the second channel (24) is an upwardly concave "cone" structure, and the upper valve plug (43) is adapted to the cone structure.

5. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The channel connecting the first channel (22) and the third channel (26) is a columnar structure that penetrates downward, and the upper section of the channel is adapted to the upper part of the lower valve plug (44), and the middle section of the channel is adapted to the lower part of the lower valve plug (44).

6. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: When the positions of the upper valve plug (43) and the lower valve plug (44) are adjusted in the valve cavity (14), the valve body (11) includes at least four channel transmission states.

7. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: At least one set of distance adjustment mechanisms is provided and installed between the upper valve plug (43) and the lower valve plug (44).

8. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The lower valve plug (44) is connected to the rod seat (53) via the internal traction rod (54), and the movable stroke of the lower valve plug (44) is the same as the movable stroke of the piston rod (52).

9. A three-way valve for a high-pressure gas storage tank according to claim 1, characterized in that: The supporting mechanism comprises a clamping ring (61) sleeved on the outer periphery of the valve stem (42) and a supporting ring (62) installed on the inner wall of the upper valve plug (43), and a stretchable spring member (63) is clamped between the clamping ring (61) and the supporting ring (62).

10. A three-way valve for a high-pressure gas storage tank according to claim 9, characterized in that: The same supporting mechanism is installed in the lower valve plug (44), the difference being that the clamping ring (61) matched with the lower valve plug (44) is also movably sleeved on the outer periphery of the valve stem (42).

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