Miniature high-pressure flat valve

Abstract

A miniature high-pressure flat valve relates to the technical field of valves and comprises a valve body, a sealing sleeve, a valve core and a valve seat, and the valve body is provided with a circular-hole-shaped accommodating cavity extending inwards from the upper end face of the valve body and a liquid flow path penetrating through the valve body and intersecting with the accommodating cavity; the sealing sleeve is mounted in the accommodating cavity, has a cylindrical shape and is matched with the accommodating cavity; the sealing sleeve is provided with a valve cavity part and a containing hole penetrating through the sealing sleeve and intersecting with the valve cavity part. The valve core is arranged in the valve cavity part and can slide up and down in the valve cavity part; the valve element is provided with a valve hole part transversely penetrating through the valve element. The valve seat is arranged on at least one side of the valve element, located in the containing hole and connected with the containing hole in a sliding mode. The front end of the valve seat abuts against one side of the valve element. The rear end of the valve seat is provided with an elastic element used for enabling the valve seat to tend to be close to the valve element. The utility model provides the miniature high-pressure flat valve which has a small drift diameter and is convenient to process and implement.

Description

Technical Field

[0001] The utility model relates to the field of valve structures, in particular to a micro high-pressure flat plate valve used in offshore oil and gas development. Background Art

[0002] In the process of offshore oil and gas production, wellheads and Christmas trees need to be equipped with a variety of small-diameter process pipelines. The diameters of these process pipelines are generally 1 / 4"-1" (6.35mm-25.4mm), which are very small. Valves are required to open / close these process pipelines. In addition, valves must also be configured at the front end of the pressure gauge for operations such as instrument replacement.

[0003] At present, the valves used in the above-mentioned application scenarios are usually high-pressure needle stop valves. For example, the Chinese utility model patent with the authorization announcement number CN202203421U discloses a needle stop valve, which includes a valve body, a valve cover, a drive shaft and a needle valve disc. Since the pressure of the above-mentioned process pipeline can reach 70MPa or even higher. In the process of opening / closing the above-mentioned high-pressure needle stop valve, the movement direction of the valve core is parallel to the flow direction of the fluid, so the resistance of the fluid pressure acting on the needle valve disc needs to be overcome during the opening or closing process of the above-mentioned needle stop valve. Under high working pressure, the resistance of the force of rotating the above-mentioned needle valve disc is very large (the resistance value is the product of the pressure of the fluid and the cross-sectional area of ​​the valve core). Therefore, the switching torque of the above-mentioned high-pressure needle stop valve is very large in the application, and it is often impossible to close, resulting in risks such as inability to operate, leakage or even shutdown. For example, after the pressure gauge fails, if the needle stop valve cannot block the fluid, the pressure gauge can only be replaced by closing the main channel valve. In the gas production wellhead, it is easy to cause the lifting failure due to closing the wellhead, the production is reduced, and even the wellhead is closed, causing significant losses.

[0004] The structure of the flat plate valve can solve the above technical problems because, in the process of opening and closing the flat plate valve, the movement direction of the valve core of the flat plate valve is perpendicular to the flow direction of the fluid. Therefore, the structure of the flat plate valve is suitable for high-pressure application scenarios such as the above process pipelines or valves. However, during the research and development process of miniaturizing the existing high-pressure flat plate valve structure, technical personnel in this field encountered difficulties in product processing and realization, which are explained below.

[0005] For example, the Chinese invention patent with the authorization announcement number CN116557558B discloses a 175MPa sand-proof flat plate valve. Figure 4As shown, a mounting hole is machined on the valve body, and the valve seat is partially embedded in the mounting hole to achieve the connection between the valve seat and the valve body. For another example, the Chinese utility model patent with the authorization announcement number CN204628602U discloses a small-diameter forged steel flat valve, in which, in order to install the valve seat, a mounting hole needs to be machined in the inner cavity of the valve body. Since the inner hole of the valve seat is the same as the diameter of the flat valve, the outer diameter of the valve seat must be larger than the diameter of the flat valve, so the diameter of the mounting hole must also be larger than the diameter of the flat valve. However, it is difficult to machine the above-mentioned mounting hole for a micro valve, because the tool rod needs to pass through the inflow hole and outflow hole of the micro valve to machine the above-mentioned mounting hole, and a tool rod that is too thin is not enough to withstand the cutting torque.

[0006] The prior art does not disclose a high-pressure flat valve having a small diameter and capable of processing the above-mentioned mounting hole. Utility Model Content

[0007] The utility model provides a miniature high-pressure flat plate valve for the above-mentioned technical problems existing in the prior art. Through creative structural improvement design, the above-mentioned mounting holes can be avoided from being processed, thus meeting the use requirements of micro-diameter and high pressure.

[0008] In order to achieve the above technical objectives, the embodiment of the utility model provides a miniature high-pressure flat valve, comprising:

[0009] A valve body, the valve body being provided with a receiving cavity extending inwardly from an upper end surface thereof and in the shape of a circular hole, and a liquid flow path penetrating the valve body and intersecting the receiving cavity;

[0010] A sealing sleeve, the sealing sleeve is installed in the accommodating cavity, the sealing sleeve has a cylindrical appearance and is adapted to the accommodating cavity; the sealing sleeve has a valve cavity portion and an accommodating hole that penetrates the sealing sleeve and intersects with the valve cavity portion;

[0011] A valve core is disposed in the valve cavity and is capable of sliding up and down in the valve cavity; the valve core is provided with a valve hole that passes through the valve core transversely;

[0012] A valve seat provided on at least one side of the valve core, located in the receiving hole and slidably connected to the receiving hole;

[0013] Among them, the front end of the valve seat is against one side of the valve core; the rear end of the valve seat is provided with an elastic element for providing the valve seat with a tendency to approach the valve core; the valve core has a first state in which the valve hole portion is connected to the liquid flow path, and a second state in which the valve hole portion and the liquid flow path are offset to close the liquid flow path.

[0014] Furthermore, a sealing groove portion is provided on the outer cylindrical surface of the sealing sleeve, surrounding the port of the accommodating hole away from the valve core side.

[0015] Furthermore, a valve seat is respectively provided on both sides of the valve core.

[0016] Furthermore, it also includes a cover plate connected to the sealing sleeve, one end surface of the cover plate abuts against the elastic element, and the other end surface forms a part of the outer cylindrical surface of the sealing sleeve.

[0017] Further, the liquid flow path includes a first through hole formed on the valve body, a second through hole formed on the valve seat, and a third through hole formed on the cover plate.

[0018] Furthermore, the valve seat is sealingly connected to the accommodating hole, and the valve seat is provided with a sealing ring groove which surrounds its outer contour and is used for installing a sealing ring.

[0019] Furthermore, the valve seat is provided with an annular groove for mounting the elastic element.

[0020] Furthermore, it also includes a valve cover, wherein the valve cover is connected to the valve body;

[0021] A positioning screw is installed between the valve cover and the sealing sleeve.

[0022] Furthermore, a positioning hole is provided on the end surface of the sealing sleeve facing the valve cover, one end of the positioning screw is threadedly connected to the positioning hole, and the other end is connected to the valve cover pin shaft.

[0023] Furthermore, it also includes a drive shaft with an external thread section at the lower end, and the drive shaft is supported to be only rotatable relative to the valve body;

[0024] The upper end of the valve body is provided with an internal thread hole which is threadedly connected to the external thread section of the drive shaft.

[0025] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0026] The utility model provides an accommodating cavity on the upper part of the valve body, and installs a sealing sleeve in the accommodating cavity, installs the valve core and the valve seat in the sealing sleeve, and then installs the sealing sleeve as a whole into the above-mentioned accommodating cavity, thereby cleverly solving the technical problem that the valve seat installation hole cannot be machined and installed inside the valve body.

[0027] In one embodiment, the sealing sleeve is roughly cylindrical in shape to match the circular inner hole of the accommodating cavity, which is easier to process, assemble and form a sealed connection than other shapes such as a square. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic structural diagram of a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0029] Figure 2 A schematic structural diagram of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0030] Figure 3 A schematic diagram of an exploded view of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0031] Figure 4 A schematic cross-sectional view of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0032] Figure 5 for Figure 4 An enlarged view of part A in FIG.

[0033] Figure 6 A schematic structural diagram of a valve body in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0034] Figure 7 A schematic structural diagram of a sealing sleeve in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0035] Figure 8 For the general Figure 7 The schematic diagram of the structure of the sealing sleeve shown in FIG. 1 is a schematic diagram of the structure of the sealing sleeve cut along the horizontal direction at the receiving hole.

[0036] Fig. 9 A schematic diagram of the structure of a valve core in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0037] Fig.10 A schematic structural diagram of a valve seat in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0038] Fig.11 A schematic diagram of the longitudinally cut structure of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure, wherein the working unit is in an open state.

[0039] Fig.12 A schematic diagram of the longitudinally cut structure of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure, wherein the working unit is in a closed state.

[0040] Description of Reference Numerals

[0041] 1. Work unit;

[0042] 11. valve body; 110. upper end surface; 111. accommodating cavity; 112. first connecting portion; 113. second connecting portion; 114A, 114B, first through hole; 115. threaded hole;

[0043] 12, sealing sleeve; 121, valve cavity; 122A, 122B, receiving hole; 123A, 123B, sealing groove; 124, positioning hole; 125A, 125B, countersunk hole;

[0044] 13. valve core; 131, 132. sealing surface; 133. internal thread hole; 134. valve hole portion;

[0045] 14A, 14B valve seat; 141, second through hole; 142, annular groove; 143, sealing ring groove; 144, sealing end face;

[0046] 15A, 15B, elastic element; 16A, 16B, sealing ring; 17, positioning screw; 18A, 18B, cover plate; 181, front end plane; 182, outer end surface; 183, third through hole;

[0047] 2. Control unit;

[0048] 21. hand wheel; 22. valve cover; 23. connecting sleeve; 231. radial boss; 24. drive shaft; 241. external thread section; 25. bearing; 26. sealing assembly; 27. upper end cover; 28. connecting pin;

[0049] 3. Liquid flow path; 30. Center axis. DETAILED DESCRIPTION

[0050] Other objects and advantages of the present invention will become apparent through explanation of the following preferred embodiments of the present application.

[0051] Figure 1 A schematic structural diagram of a micro high-pressure flat valve provided in at least one embodiment of the present disclosure. Figure 2 A schematic structural diagram of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure. Figure 3 A schematic diagram of an exploded view of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure. Figure 4 A schematic cross-sectional view of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure. Figure 5 for Figure 4 An enlarged view of part A in FIG.

[0052] For example, in some embodiments, Figures 1 to 5 As shown, the micro high-pressure flat valve includes a working unit 1 and a control unit 2. The micro high-pressure flat valve has an open state and a closed state. In the open state, the micro high-pressure flat valve forms a through liquid flow path 3; in the closed state, the liquid flow path 3 is cut off. The working unit 1 is used to open / close the liquid flow path 3. The control unit 2 is used to provide power to open / close the liquid flow path 3.

[0053] In order to solve the problem that the micro high-pressure flat valve is difficult to process, the utility model sets a accommodating chamber 111 on the upper part of the valve body 11, and installs a sealing sleeve 12 in the accommodating chamber 111, installs the valve core 13 and the valve seat 14A and 14B in the sealing sleeve 12, and then installs the sealing sleeve 12 as a whole into the above-mentioned accommodating chamber 111, thereby cleverly solving the technical problem that the valve seat mounting hole cannot be processed and installed inside the valve body 11.

[0054]

Valve body 11

[0055] Figure 6 A schematic structural diagram of a valve body in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0056] For example, in some embodiments, Figure 6 As shown, the valve body 11 has an upper end surface 110, which is processed into a flat surface. The valve body 11 is provided with a circular hole-shaped accommodation cavity 111 extending downward from the upper end surface 110 and not penetrating the valve body 11. The upper end surface 110 of the valve body 11 is also provided with a plurality of threaded holes 115 evenly arranged around the accommodation cavity 111. The valve cover 22 can be installed on the valve body 11 through the threaded holes 115.

[0057] One side of the valve body 11 is provided with a first connection portion 112 extending in the horizontal direction and protruding from the valve body 11, and the other side of the valve body 11 is provided with a second connection portion 113 extending in the horizontal direction and protruding from the valve body 11. The first connection portion 112 and the second connection portion 113 may also be flanges, threads or union structures, for example, Figure 1 FIG. 1 shows a connection structure in which the end surfaces of the first connection portion 112 and the second connection portion 113 are provided with internal threaded holes. For another example, Figure 2 In the embodiment, the ends of the first connection portion 112 and the second connection portion 113 are both chamfered to be welded with the pipeline, but the present disclosure is not limited thereto.

[0058] The first connection portion 112 of the valve body 11 is provided with a first through hole 114A extending from the end surface of the first connection portion 112 toward the inner side of the valve body 11 and communicating with the accommodating chamber 111; the second connection portion 113 of the valve body 11 is provided with a first through hole 114B extending from the end surface of the second connection portion 113 toward the inner side of the valve body 11 and communicating with the accommodating chamber 111. The first through hole 114A and the second through hole 114B may be coaxially arranged or non-coaxially arranged, for example, the first through hole 114A is perpendicular to the second through hole 114B, which is not particularly limited in the present disclosure.

[0059]

Sealing sleeve 12

[0060] The sealing sleeve 12 is installed in the accommodating cavity 111 of the valve body 11. The shape of the sealing sleeve 12 is adapted to the shape of the accommodating cavity 111. In some embodiments, the shape of the sealing sleeve 12 is generally cylindrical to adapt to the circular inner hole of the accommodating cavity 111, which is easier to process, assemble and form a sealed connection than a square shape.

[0061] Figure 7 A schematic structural diagram of a sealing sleeve in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure. Figure 8 For the general Figure 7 The schematic diagram of the structure of the sealing sleeve shown in FIG. 1 is a schematic diagram of the structure of the sealing sleeve cut along the horizontal direction at the receiving hole.

[0062] For example, in some embodiments, Figure 7 and Figure 8 As shown, the sealing sleeve 12 has a cross-shaped inner hole shape. In the vertical direction, the sealing sleeve 12 has a valve cavity 121 arranged longitudinally and penetrating it, and the inner contour shape of the valve cavity 121 is adapted to the outer contour shape of the valve core 13, so that the valve core 13 can be placed in the valve cavity 121 and move up and down along the valve cavity 121. In some embodiments, the valve cavity 121 has a square inner hole shape; accordingly, the valve core 13 also has a roughly quadrangular prism-shaped external structure.

[0063] In the horizontal direction, the sealing sleeve 12 has a receiving hole 122A and a receiving hole 122B penetrating the sealing sleeve 12 in the horizontal direction. The receiving hole 122A provides a receiving space for the valve seat 14A; the receiving hole 122B provides a receiving space for the valve seat 14B. A countersunk hole 125A for mounting the cover plate 18A is provided at the outer end of the receiving hole 122A, and the inner end of the receiving hole 122A is communicated with the valve cavity 121. A countersunk hole 125B for mounting the cover plate 18B is provided at the outer end of the receiving hole 122B, and the inner end of the receiving hole 122B is also communicated with the valve cavity 121.

[0064] In addition, a sealing groove 123A surrounding the entire circumference of the counterbore 125A (i.e., the port outside the receiving hole 122A) and a sealing groove 123B surrounding the entire circumference of the counterbore 125B (i.e., the port outside the receiving hole 122B) are provided on the outer contour of the sealing sleeve 12. Sealing rings are installed in the sealing grooves 123A and 123B, and the sealing rings may be, for example, O-type rubber sealing rings. The sealing grooves 123A and 123B and the sealing rings installed therein are used to form a sealed connection between the sealing sleeve 12 and the valve body 11 to form the above-mentioned liquid flow path 3.

[0065]

Valve core 13

[0066] The valve core 13 is installed in the valve cavity 121 in the sealing sleeve 12 and can move in the valve cavity 121 along the up-down direction to open / close the liquid flow path 3 of the micro high-pressure flat valve.

[0067] Fig. 9 A schematic diagram of the structure of a valve core in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0068] For example, in some embodiments, Fig. 9 As shown, the valve core 13 is roughly in the shape of a quadrangular prism, and the surface of the valve core 13 close to the outside of the paper is a sealing surface 131, and the sealing surface 131 is sealed to the valve seat 14A; the valve core 13 is located on the inside of the paper and has a sealing surface 132 symmetrically arranged with the sealing surface 131, and the sealing surface 132 is sealed to the valve seat 14B.

[0069] The lower part of the valve core 13 is provided with a valve hole portion 134 penetrating the valve core 13. The diameter of the valve hole portion 134 is the same as or similar to the diameter of the first through holes 114A, 114B in the valve body 11. The upper end of the valve body 13 is provided with an internal threaded hole 133, and the control unit 2 is connected to the valve body 13 through the internal threaded hole 133 to drive the valve body 13 to rise or fall.

[0070]

Valve seat 14A, 14B

[0071] Fig.10 A schematic structural diagram of a valve seat in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure.

[0072] For example, in some embodiments, Fig.10 As shown, the valve seats 14A and 14B are symmetrically arranged relative to the valve body 11.

[0073] The valve seat 14A is used as an example for explanation. The rear end (the direction away from the valve core 13) of the valve seat 14A is provided with an annular groove 142 for mounting the elastic element 15A. The outer circumference of the valve seat 14A is provided with a sealing ring groove 143 for mounting the sealing ring 16A. The front end (the direction toward the valve core 13) of the valve seat 14A is provided with a sealing end surface 144, which abuts against the sealing surface 131 of the valve core 13 to form a sealing connection surface.

[0074] [Elastic element 15]

[0075] In some embodiments, Figure 3 , Figure 5 and Fig.10As shown, part of the elastic element 15 is embedded in the annular groove 142, one end face of the elastic element 15 abuts against the bottom of the annular groove 142, and the other end face abuts against the end face of the cover plate 18A, so that the elastic element 15 can provide an elastic force to keep the sealing end face 144 of the valve seat 14A in contact with the sealing surface 131 of the valve core to form a sealed connection.

[0076] For example, the elastic element 15 may be a wave spring, or a coil spring, or a disc spring, but the embodiments of the present disclosure are not limited thereto.

[0077] [Cover plates 18A, 18B]

[0078] In some embodiments, Figure 3 and Figure 5 As shown, the cover plate 18A and the cover plate 18B are symmetrically arranged relative to the valve core 13, and the following description will be made taking the cover plate 18A as an example.

[0079] The front end of the cover plate 18A (the end facing the valve core 13) is formed with a front end plane 181, and the rear end of the cover plate 18A is formed with an arc-shaped outer end surface 182. After the cover plate 18A is installed in the counterbore portion 125A of the sealing sleeve 12, the arc-shaped outer end surface 182 of the cover plate 18A and the outer contour of the sealing sleeve 12 together form a cylindrical surface.

[0080] The cover plate 18A is connected to the sealing sleeve 12 as a whole by screws. In some embodiments, a positioning pin is further provided between the cover plate 18A and the sealing sleeve 12 to position the cover plate 18A.

[0081]

Work Unit 1

[0082] In some embodiments, Figures 1 to 10 As shown, the working unit 1 includes a sealing sleeve 12, and a valve core 13 is installed in the accommodating cavity 121 of the sealing sleeve 12. A valve seat 14A is installed in the accommodating hole 122A of the sealing sleeve 12. A sealing ring 16A is installed in the sealing ring groove 143 of the valve seat 14A. Through the above-mentioned sealing ring 16A, the valve seat 14A and the accommodating hole 122A form a sealed connection, and under the elastic force of the elastic element 15A, the valve seat 14A has a tendency to slide along the accommodating hole 122A toward the valve core 13, so as to form a sealed connection between the sealing end surface 144 of the valve seat 14A and the sealing surface 131 of the valve core 13.

[0083] For example, in some embodiments, Figure 5 As shown, the cover plate 18A is connected to the sealing sleeve 12 by screws and pins, and the front end plane of the cover plate 18A abuts against the bottom surface of the counterbore portion 125A.

[0084] The valve seat 14B, the elastic element 15B, the sealing ring 16B and the cover plate 18B are respectively symmetrical with the valve seat 14A, the elastic element 15A, the sealing ring 16A and the cover plate 18A relative to the valve core 13. Therefore, the valve seat 14B, the elastic element 15B, the sealing ring 16B and the cover plate 18B and their installation relationship are not described in detail.

[0085]

Control Unit 2

[0086] The control unit 2 is used to provide power for the rise and fall of the valve core 13. For example, in some embodiments, Figure 1 As shown, the control unit 2 includes a hand wheel 21 , a valve cover 22 , a connecting sleeve 23 and a drive shaft 24 .

[0087] The valve cover 22 is connected to the upper end surface 110 of the valve body 11 through a bolt group. In some embodiments, the lower end surface of the valve cover is provided with a pin hole, the upper end surface of the sealing sleeve 12 is provided with a positioning hole 124, the lower end of the positioning screw 17 is threadedly connected to the positioning hole 124, and the upper end of the positioning screw 17 is connected to the pin hole of the valve cover 22.

[0088] The drive shaft 24 passes through the middle hole of the valve cover 22, the lower end of the drive shaft 24 is connected to the internal threaded hole 133 at the upper end of the valve core 13, and the upper end of the drive shaft 24 is fixedly connected to the connecting sleeve 24. For example, in one embodiment, Figure 1 As shown, a hole is set at the lower end of the connecting sleeve 23, the upper end of the driving shaft 24 is inserted into the hole at the lower end of the connecting sleeve 23, and a connecting pin 28 is radially set on the connecting sleeve 23 and the driving shaft 24, and a fixed connection between the connecting sleeve 23 and the driving shaft 24 is achieved through the connecting pin 28.

[0089] In addition, a sealing component 26 is provided between the valve cover 22 and the valve core 23. The sealing component 26 is used to achieve a sealed connection between the drive shaft 24 and the valve cover 22. During the rotation of the drive shaft 24, the sealing component 26 can also maintain a sealed connection between the two.

[0090] The control unit 2 also includes an upper end cover 27, which is connected to the valve cover 22 by bolts. A radial boss 231 is provided on the connecting sleeve 23, and the radial boss 231 is located between the upper end cover 27 and the valve cover 22, and a bearing 25 is provided between the upper side of the radial boss 231 and the upper end cover 27; a bearing 25 is also provided between the lower side of the radial boss 231 and the valve cover 22; the bearing 25 provides axial and radial support for the connecting sleeve 23. The connecting sleeve 23 is limited to being able to rotate only by the bearing 25, and the upper end of the drive shaft 24 is fixedly connected to the connecting sleeve 23, so that the drive shaft 24 can also only rotate. In one embodiment, the upper end of the drive shaft 24 is placed in the hole at the lower end of the connecting sleeve 23 and the fixed connection between the two is achieved by a radially arranged connecting pin 28, but the present application is not limited thereto. An external thread section 241 is provided at the lower end of the driving shaft 24 , and the external thread section 241 is threadedly connected to the internal thread hole 133 provided at the upper end of the valve body 13 , so that the driving shaft 24 can drive the valve body 13 to move up and down when rotating.

[0091] The upper end of the connecting sleeve 23 passes through the central hole of the upper end cover 27 and extends outward at one end. The hand wheel 21 is fixedly connected to the upper end of the connecting sleeve 23 , and the connecting sleeve 23 can be rotated by the hand wheel 21 .

[0092]

Liquid flow path 3

[0093] Fig.11 A schematic diagram of the longitudinally cut structure of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure, wherein the working unit is in an open state. Fig.12 A schematic diagram of the longitudinally cut structure of a working unit in a micro high-pressure flat valve provided in at least one embodiment of the present disclosure, wherein the working unit is in a closed state.

[0094] Viewed from the direction from the first connection portion 112 to the second connection portion 113 of the valve body 11, the liquid flow path 3 is composed of multiple sections, including in sequence: a first through hole 114A in the first connection portion 112, an inner hole of the cover plate 18A, a second through hole 141 of the valve seat 14A, a valve hole portion 134 in the valve core 13, a second inner hole 141 of the valve seat 14B, an inner hole of the cover plate 18B and a first through hole 114B in the second connection portion 113.

[0095] like Fig.11 As shown, the valve core 13 is in the first position, the valve hole portion 134 of the valve core 13 is in the liquid flow path 3, and the micro high-pressure flat valve is in an open state.

[0096] like Fig.12 As shown, the valve core 13 is in the second position, the valve hole portion 134 of the valve core 13 is offset from the liquid flow path 3, so that the liquid flow path 3 is closed by the valve core 13, and the micro high-pressure flat valve is in a closed state.

[0097] The device of the present application is described in detail with reference to the preferred technical solution of the present application. However, it should be noted that, without departing from the spirit of the present application, those skilled in the art may make any transformation, modification and change based on the above disclosure. The present application includes the above specific embodiments and any equivalent forms thereof.

Claims

1. A micro high pressure flat valve, characterized in that: include: A valve body, the valve body being provided with a receiving cavity extending inwardly from an upper end surface thereof and in the shape of a circular hole, and a liquid flow path penetrating the valve body and intersecting the receiving cavity; A sealing sleeve, the sealing sleeve is installed in the accommodating cavity, the sealing sleeve has a cylindrical appearance and is adapted to the accommodating cavity; the sealing sleeve has a valve cavity portion and an accommodating hole that penetrates the sealing sleeve and intersects with the valve cavity portion; A valve core is disposed in the valve cavity and is capable of sliding up and down in the valve cavity; the valve core is provided with a valve hole that passes through the valve core transversely; A valve seat provided on at least one side of the valve core, located in the receiving hole and slidably connected to the receiving hole; Among them, the front end of the valve seat is against one side of the valve core; the rear end of the valve seat is provided with an elastic element for providing the valve seat with a tendency to approach the valve core; the valve core has a first state in which the valve hole portion is connected to the liquid flow path, and a second state in which the valve hole portion and the liquid flow path are offset to close the liquid flow path.

2. The micro high-pressure flat valve according to claim 1, characterized in that: A sealing groove portion is provided on the outer cylindrical surface of the sealing sleeve and surrounds the port of the accommodating hole away from the valve core.

3. The micro high-pressure flat valve according to claim 2, characterized in that: A valve seat is respectively provided on both sides of the valve core.

4. The micro high-pressure flat valve according to claim 1, characterized in that: It also includes a cover plate connected to the sealing sleeve, one end surface of the cover plate abuts against the elastic element, and the other end surface forms a part of the outer cylindrical surface of the sealing sleeve.

5. The micro high-pressure flat valve according to claim 4, characterized in that: The liquid flow path includes a first through hole formed on the valve body, a second through hole formed on the valve seat, and a third through hole formed on the cover plate.

6. The micro high pressure flat valve according to any one of claims 1 to 5, characterized in that: The valve seat is sealingly connected to the accommodating hole, and a sealing ring groove which surrounds the outer contour of the valve seat and is used for installing a sealing ring is provided on the valve seat.

7. The micro high-pressure flat valve according to any one of claims 1 to 5, characterized in that: The valve seat is provided with an annular groove for mounting the elastic element.

8. The micro high-pressure flat valve according to any one of claims 1 to 5, characterized in that: Also includes a valve cover, the valve cover is connected to the valve body; A positioning screw is installed between the valve cover and the sealing sleeve.

9. The micro high-pressure flat valve according to claim 8, characterized in that: A positioning hole is provided on the end surface of the sealing sleeve facing the valve cover, one end of the positioning screw is threadedly connected to the positioning hole, and the other end is connected to the valve cover pin shaft.

10. The micro high pressure flat valve according to any one of claims 1 to 5, characterized in that: It also includes a drive shaft with an external thread section at the lower end, and the drive shaft is supported to be only rotatable relative to the valve body; The upper end of the valve body is provided with an internal thread hole which is threadedly connected to the external thread section of the drive shaft.

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