Ultrahigh-pressure two-way sealing type gate valve

Abstract

The ultrahigh-pressure two-way sealing type gate valve comprises a valve body, a sealing assembly and a compression resistance assembly, the sealing assembly comprises a connecting base, a valve cover, a sealing ring, a rubber block, a top cover and a dustproof cover, the connecting base is fixedly connected to the outer surface of the valve body, and the lower end of the valve cover and the upper end of the connecting base are fixedly installed; the sealing ring is clamped between the connecting seat and the valve cover, the rubber block is clamped in the valve cover, and the lower end of the top cover and the upper end of the valve cover are fixedly installed. According to the ultrahigh-pressure two-way sealing type gate valve, through matched arrangement of the connecting base, the valve cover, the sealing ring, the rubber block, the top cover and the dustproof cover, double-sealing guarantee is achieved, through arrangement of the sealing ring and the rubber block, the elasticity and abrasion resistance of a sealing face are enhanced, and huge impact force of ultrahigh-pressure fluid on the sealing face can be effectively resisted; and the problem that the sealing performance of the sealing material is reduced due to plastic deformation or abrasion is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gate valves, and specifically to an ultra-high pressure two-way sealing gate valve. Background Art

[0002] The most important function of a gate valve is to cut off the flow of the medium in the pipeline. In a pipeline system, when it is necessary to repair, maintain or replace equipment in a certain section of the pipeline, the gate valve can be closed to isolate this section of the pipeline from other parts, prevent the medium from flowing continuously, and ensure operation safety. For example, in the urban water supply pipeline, when it is necessary to repair a pipeline in a certain area, the corresponding gate valve can be closed to cut off the water flow. In some special pipeline systems, the gate valve can also be used in conjunction with a check valve to prevent the reverse flow of the medium. When there is a tendency of reverse flow of the medium in the pipeline, the gate valve can be closed in time to prevent the reverse flow of the medium and protect the safety of the equipment and pipeline system. For example, in some sewage discharge systems, the gate valve can prevent the sewage from flowing back into the sewage treatment equipment and avoid damaging the equipment or affecting the treatment effect. The gate valve has excellent sealing performance and can ensure that the medium does not leak in the closed state. This benefits from the sealing surface design of the gate valve, which is usually made of wear-resistant materials such as stainless steel and hard alloy, and is processed by precision machining and heat treatment processes to improve its hardness and corrosion resistance.

[0003] Chinese Patent Publication No. CN109944956A discloses an ultra-high pressure gate valve, which includes an actuator, a valve body, a valve stem, a large valve core, and a small valve core. The valve stem, the large valve core, and the small valve core are arranged inside the valve body. The actuator drives the large valve core and the small valve core to move up and down through the valve stem. The valve stem is connected to the large valve core and the small valve core by an inlaid convex groove. The large valve core is movably connected to the small valve core. The sealing valve seat is hermetically connected to the large valve core through a large sealing disc, and the large sealing disc is hermetically connected to the small valve core through a small sealing disc. The ultra-high pressure gate valve provided by the present invention can reasonably release the pressure before and after the large valve core even in the case of a large medium flow rate. After the pressure before and after the large valve core is reasonably released, the vibration of the large valve core is small, the wear of the sealing surfaces of the valve core and the sealing valve seat is small, the service life of the gate valve is long, the operating torque of the valve stem is small, and the gate valve is easy to open and close. When the gate valve is closed, the sealing surfaces of the valve core and the sealing valve seat, and the sealing surfaces around the centers of the small sealing disc and the large sealing disc have good sealing effects and no leakage.

[0004] However, the existing devices have the following problems:

[0005] In the prior art, when traditional gate valves are used to transport high-pressure fluids, due to the huge pressure between the sealing surfaces, the sealing materials are prone to plastic deformation or wear, resulting in a decline in sealing performance. In addition, the friction between components such as the valve stem and the pressure plate also exacerbates the wear of the valve stem, shortening the service life of the gate valve. At the same time, the opening and closing of the gate valve in an ultra-high-pressure environment requires overcoming greater frictional forces, increasing the operation difficulty and energy consumption, leading to the problem that it is inconvenient for staff to operate. Summary of the Invention

[0006] (1) Technical problems to be solved

[0007] In view of the deficiencies of the prior art, the present invention provides an ultra-high-pressure bidirectional sealing gate valve, which has the advantages of good sealing performance in an ultra-high-pressure environment and being convenient for staff to open and close, and solves the problems of deformation and wear under huge pressure on the sealing surface.

[0008] (2) Technical solutions

[0009] To achieve the above object, the present invention provides the following technical solution: An ultra-high-pressure bidirectional sealing gate valve, comprising a valve body, a sealing assembly and a pressure-resistant assembly, wherein:

[0010] The sealing assembly includes a connecting seat, a valve cover, a sealing ring, a rubber block, a top cover and a dust cover. The connecting seat is fixedly connected to the outer surface of the valve body. The lower end of the valve cover is fixedly installed on the upper end of the connecting seat. The sealing ring is clamped between the connecting seat and the valve cover. The rubber block is clamped inside the valve cover. The lower end of the top cover is fixedly installed on the upper end of the valve cover. The lower end of the dust cover is fixedly installed on the upper end of the top cover;

[0011] The pressure-resistant assembly includes a valve stem, an elastic valve seat and a plurality of bumps. The elastic valve seat is clamped inside the valve body. The lower end of the valve stem is threadedly connected to the upper end of the elastic valve seat. A plurality of bumps are arranged on the outer surface of the elastic valve seat.

[0012] Preferably, both ends of the valve body are fixedly connected with mounting disks for connection, and threaded holes for positioning are provided on the side surfaces of the mounting disks.

[0013] Preferably, a chuck for connection is fixedly installed on the side surface of the mounting disk, and a pipeline for transportation is fixedly connected to the side surface of the chuck.

[0014] Preferably, a screw for fixing is inserted into the side surface of the chuck, and the screw penetrates through the side surface of the chuck and is threadedly connected to the side surface of the mounting disk.

[0015] Preferably, a retaining sleeve for limiting is fixedly connected to the lower end of the valve cover, and a bolt for fixing is inserted into the upper end of the valve cover.

[0016] Preferably, an installation pipe for positioning is fixedly connected to the upper end of the top cover, and a positioning pin for fixing is inserted into the upper end of the top cover.

[0017] Preferably, a bolt for fixing is inserted into the upper end of the dust cover, and a sealing gasket is provided on the inner side wall of the dust cover.

[0018] Preferably, a connecting disk for positioning is fixedly connected to the top end of the valve stem, and a handwheel for rotation is fixedly connected to the outer surface of the connecting disk.

[0019] Preferably, a fixing pipe for positioning is fixedly connected to the upper end of the elastic valve seat, and a clamping hole for positioning is provided at the upper end of the fixing pipe.

[0020] Preferably, a disk for connection is fixedly connected to the lower end of the elastic valve seat, and a clamping shaft for positioning is fixedly installed at the lower end of the disk.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention provides an ultra-high pressure bidirectional sealing gate valve, which has the following

[0023] beneficial effects:

[0024] 1. For this ultra-high pressure bidirectional sealing gate valve, through the combined setting of the connecting seat, valve cover, sealing ring, rubber block, top cover and dust cover, double-sealing guarantee is achieved. The setting of the sealing ring and rubber block not only enhances the elasticity and wear resistance of the sealing surface, but also can effectively resist the huge impact force of ultra-high pressure fluid on the sealing surface, avoiding the problem of sealing performance degradation caused by plastic deformation or wear of the sealing material. At the same time, the design of the dust cover effectively prevents the erosion of external impurities on the sealing components, further extending the service life of the sealing components. At the same time, due to the improvement of the sealing performance, the friction force required during the opening and closing process of the gate valve is correspondingly reduced, making the operation easier and more convenient, and reducing the energy consumption.

[0025] 2. For this ultra-high pressure bidirectional sealing gate valve, through the combined setting of the valve stem, elastic valve seat and multiple convex blocks, the pressure resistance and sealing stability of the gate valve are greatly improved. When the valve is closed, the valve seat is in close contact with the sphere or gate plate. Due to the characteristics of the elastic material, the valve seat can produce appropriate elastic deformation to fill any tiny gap between the valve body and the sphere or gate plate. This deformation not only ensures the tight sealing of the valve, but also the elastic valve seat can flexibly adapt to the tiny displacement of the valve stem during the opening and closing process, ensuring the tight fit of the sealing surface, thereby effectively preventing fluid leakage. The existence of multiple convex blocks increases the contact area between the elastic valve seat and the inner wall of the valve body, improving the pressure-bearing capacity of the sealing surface, so that the gate valve can still maintain a good sealing effect in an ultra-high pressure environment. Description of the Drawings

[0026] Figure 1 Schematic structural diagram of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0027] Figure 2 Schematic structural diagram of an installation disk of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0028] Figure 3 Schematic structural diagram of a connection seat of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0029] Figure 4 Schematic structural diagram of a top cover of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0030] Figure 5 Schematic structural diagram of a dust-proof cover of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0031] Figure 6 Schematic structural diagram of a valve cover of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0032] Figure 7 Schematic structural diagram of a valve stem of a super high-pressure two-way sealing gate valve proposed by the present invention;

[0033] Figure 8 Schematic structural diagram of an elastic valve seat of a super high-pressure two-way sealing gate valve proposed by the present invention.

[0034] In the figure: 1, valve body; 2, sealing assembly; 201, connection seat; 202, valve cover; 203, sealing ring; 204, rubber block; 205, top cover; 206, dust-proof cover; 3, compressive component; 301, valve stem; 302, elastic valve seat; 303, multiple bumps; 4, installation disk; 5, chuck; 6, pipeline; 7, screw; 8, ferrule; 9, bolt; 10, installation pipe; 11, positioning pin; 12, dowel pin; 13, connection disk; 14, handwheel; 15, fixed pipe; 16, disk; 17, chuck shaft. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] Please refer to Figures 1 to 8, the present invention provides an ultra-high pressure bi-directional sealing gate valve, which is applied to the scenario of cutting off the flow of the medium in the pipeline. In this embodiment, by improving the structure of the gate valve, it has the advantages of strong sealing performance and compressive capacity. Specifically, taking the gate valve as an example, as a preferred solution in this embodiment, the gate valve is specifically an ultra-high pressure bi-directional sealing gate valve, which can cut off the flow of the medium in the pipeline.

[0037] Please refer to Figures 1 to 8 , the present invention provides a technical solution: an ultra-high pressure bi-directional sealing gate valve, which is mainly applied to the scenario of cutting off the flow of the medium in the pipeline.

[0038] It includes a valve body 1, a sealing component 2 and a compressive component 3, where:

[0039] The sealing component 2 includes a connecting seat 201, a valve cover 202, a sealing ring 203, a rubber block 204, a top cover 205 and a dust cover 206. The connecting seat 201 is fixedly connected to the outer surface of the valve body 1. The lower end of the valve cover 202 is fixedly installed on the upper end of the connecting seat 201. The sealing ring 203 is clamped between the connecting seat 201 and the valve cover 202. The rubber block 204 is clamped inside the valve cover 202. The lower end of the top cover 205 is fixedly installed on the upper end of the valve cover 202. The lower end of the dust cover 206 is fixedly installed on the upper end of the top cover 205;

[0040] The compressive component 3 includes a valve stem 301, an elastic valve seat 302 and a plurality of bumps 303. The elastic valve seat 302 is clamped inside the valve body 1. The lower end of the valve stem 301 is threadedly connected to the upper end of the elastic valve seat 302. A plurality of bumps 303 are arranged on the outer surface of the elastic valve seat 302.

[0041] In this embodiment, through the setting of the valve body 1, the sealing component 2 and the compressive component 3, and through the unique design of the sealing component 2 and the compressive component 3 of this ultra-high pressure bi-directional sealing gate valve, the problems existing in the traditional gate valve in the ultra-high pressure fluid transportation environment, such as the decline of the sealing performance, the aggravation of the wear of the valve stem 301, the large operation difficulty and the increase of the energy consumption, are effectively solved. It has remarkable effects such as the improvement of the sealing performance, the simple operation, the reduction of the energy consumption and the strong applicability, and provides a more reliable and efficient gate valve for the ultra-high pressure fluid transportation system.

[0042] Both ends of the valve body 1 are fixedly connected with mounting plates 4 for connection. Threaded holes for positioning are opened on the side surfaces of the mounting plates 4. Through the setting of the mounting plates 4 and the threaded holes, it can facilitate the staff to more conveniently fix the pipeline 6 at both ends of the valve body 1, and further play the role of facilitating the operation of the staff. Through the threaded holes, the screws 7 can be positioned, so as to realize the precise positioning and stable installation of the valve body 1.

[0043] On the side of the mounting disc 4, a chuck 5 for connection is fixedly installed. On the side of the chuck 5, a pipe 6 for conveying is fixedly connected. Through the settings of the chuck 5 and the pipe 6, it is convenient for the staff to fix the pipe 6 at both ends of the valve body 1, further ensuring that when the pipe 6 conveys high-pressure fluid, the pipe 6 will not shake, further ensuring the stability and sealing of the connection between the mounting disc 4 and the chuck 5, and preventing liquid leakage at the connection.

[0044] A screw 7 for fixing is inserted into the side of the chuck 5. The screw 7 passes through the side of the chuck 5 and is threadedly connected to the side of the mounting disc 4. Through the setting of the screw 7, the staff can fix the mounting disc 4 and the chuck 5 more firmly together, further ensuring that when the pipe 6 is connected to the valve body 1, the pipe 6 will not fall off, and further improving the overall stability of the ultra-high pressure bi-directional sealing gate valve.

[0045] At the lower end of the valve cover 202, a ferrule 8 for positioning is fixedly connected. At the upper end of the valve cover 202, a bolt 9 for fixing is inserted. Through the settings of the ferrule 8 and the bolt 9, the ferrule 8 is stuck on the upper end of the connecting seat 201, further playing a role in positioning and sealing. At the same time, through the setting of the bolt 9, the valve cover 202 can be fixed more firmly on the upper end of the connecting seat 201. At the same time, a positioning hole is opened at the upper end of the sealing ring 203, and the bolt 9 can pass through the sealing ring 203, so that the sealing ring 203 can be fixed between the connecting seat 201 and the valve cover 202, further playing a role in sealing the connection between the connecting seat 201 and the valve cover 202.

[0046] At the upper end of the top cover 205, a mounting pipe 10 for positioning is fixedly connected. At the upper end of the top cover 205, a positioning pin 11 for fixing is inserted. Through the settings of the mounting pipe 10 and the positioning pin 11, the mounting pipe 10 can play a role in positioning and installing the dust cover 206, and at the same time play a role in positioning the valve stem 301. At the same time, through the positioning pin 11, the top cover 205 can be fixed more firmly on the upper end of the valve cover 202, further playing a role in protecting the valve stem 301.

[0047] A bolt 12 for fixing is inserted into the upper end of the dust cover 206. A sealing gasket is provided on the inner side wall of the dust cover 206. Through the settings of the bolt 12 and the sealing gasket, it is convenient for the staff to fix the dust cover 206 on the upper end of the top cover 205, further achieving the effect of preventing dust from entering and affecting the valve sealing performance, further extending the service life of the sealing assembly 2, and at the same time reducing the frictional force required during the opening and closing process of the gate valve, making the operation easier and more convenient, and thus achieving the purpose of facilitating the staff to operate.

[0048] A connecting disc 13 for positioning is fixedly connected to the top end of the valve stem 301, and a handwheel 14 for rotation is fixedly connected to the outer surface of the connecting disc 13. Through the settings of the connecting disc 13 and the handwheel 14, the connecting disc 13, as a fixing component at the top end of the valve stem 301, plays a positioning role, ensuring that the valve stem 301 can be stably installed at a predetermined position, preventing the valve stem 301 from shifting or shaking during operation. At the same time, the connecting disc 13 bears the torque transmitted by the handwheel 14 and various forces during the operation of the valve, which helps to ensure the stability and reliability of the valve. By rotating the handwheel 14, the valve stem 301 can be driven, thereby controlling the opening and closing of the valve. The handwheel 14 is usually designed in line with ergonomic principles, facilitating the operator to apply force and accurately control the opening degree of the valve.

[0049] A fixing pipe 15 for positioning is fixedly connected to the upper end of the elastic valve seat 302, and a clamping hole for positioning is opened at the upper end of the fixing pipe 15. Through the settings of the fixing pipe 15 and the clamping hole, it is convenient for the staff to more conveniently fix the valve stem 301 on the upper end of the elastic valve seat 302. Further, when the staff controls the valve stem 301, the elastic valve seat 302 can be more conveniently controlled. By optimizing the connection method between the valve stem 301 and the elastic valve seat 302, the installation and disassembly process of the valve stem 301 is simplified, the friction between the valve stem 301 and components such as the pressure plate is reduced, the wear speed of the valve stem 301 is lowered, and thus the overall service life of the gate valve is extended.

[0050] A disc 16 for connection is fixedly connected to the lower end of the elastic valve seat 302, and a clamping shaft 17 for positioning is fixedly installed at the lower end of the disc 16. Through the settings of the disc 16 and the clamping shaft 17, the elastic valve seat 302 can be more stably clamped inside the valve body 1. Through the close fit of the clamping shaft 17 with the valve body or other components, it can be ensured that the valve seat assembly maintains the correct position inside the valve, preventing it from shifting or loosening.

[0051] In summary, when the ultra-high pressure bi-directional sealing gate valve is in use:

[0052] 1. First, ensure that the gate valve is in the initial state, that is, the valve stem 301, the elastic valve seat 302 and their related components are all in the preset positions. The operator rotates the handwheel 14, and the handwheel 14 drives the connecting disc 13 to rotate, thereby driving the valve stem 301 to rise or fall along the thread direction. The up and down movement of the valve stem 301 will drive the elastic valve seat 302 to move synchronously, thus controlling the opening and closing of the gate valve;

[0053] 2. Secondly, when opening the gate valve, the valve stem 301 descends, and the elastic valve seat 302 moves accordingly, causing the sealing surface thereon to gradually separate from the sphere or gate plate within the valve body 1, allowing the fluid to pass through. Since the elastic valve seat 302 is made of an elastic material, it can produce an appropriate amount of elastic deformation, thus effectively filling the tiny gap between the valve body 1 and the sphere or gate plate, ensuring that fluid leakage will not occur due to an excessive gap during the opening process.

[0054] 3. Then, when closing the gate valve, the valve stem 301 ascends, and the elastic valve seat 302 closely fits the sphere or gate plate to form a tight seal. At this time, due to the elastic deformation of the elastic valve seat 302, it can flexibly adapt to the tiny displacement of the valve stem 301 during the opening and closing process, ensuring the tight fit of the sealing surface and effectively preventing fluid leakage. At the same time, multiple bumps 303 on the outer surface of the elastic valve seat 302 are in close contact with the inner wall of the valve body 1, increasing the contact area and improving the pressure-bearing capacity of the sealing surface, enabling the gate valve to maintain a good sealing effect even in an ultra-high pressure environment.

[0055] 4. Finally, during the use of the gate valve, the design of the dust cover 206 effectively prevents external impurities from eroding the sealing assembly 2, extending the service life of the sealing assembly 2. At the same time, due to the improvement of the sealing performance, the friction force required during the opening and closing process of the gate valve is reduced, the operation is more relaxed and convenient, and the energy consumption is reduced.

[0056] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one" does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0057] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made therein without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultra-high pressure bidirectional sealing gate valve, characterized in that: It comprises a valve body (1), a sealing component (2) and a pressure-resistant component (3), wherein: The sealing assembly (2) comprises a connecting seat (201), a valve cover (202), a sealing ring (203), a rubber block (204), a top cover (205) and a dust cover (206); the connecting seat (201) is fixedly connected to the outer surface of the valve body (1); the lower end of the valve cover (202) is fixedly mounted on the upper end of the connecting seat (201); the sealing ring (203) is clamped between the connecting seat (201) and the valve cover (202); the rubber block (204) is clamped inside the valve cover (202); the lower end of the top cover (205) is fixedly mounted on the upper end of the valve cover (202); and the lower end of the dust cover (206) is fixedly mounted on the upper end of the top cover (205); The pressure-resistant component (3) comprises a valve stem (301), an elastic valve seat (302) and a plurality of protrusions (303); the elastic valve seat (302) is clamped inside the valve body (1); the lower end of the valve stem (301) is threadedly connected to the upper end of the elastic valve seat (302); and the outer surface of the elastic valve seat (302) is provided with a plurality of protrusions (303).

2. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: Both ends of the valve body (1) are fixedly connected with mounting plates (4) for connection, and the side surfaces of the mounting plates (4) are provided with threaded holes for positioning.

3. The ultra-high pressure bidirectional sealing gate valve according to claim 2, characterized in that: A chuck (5) for connection is fixedly mounted on the side of the mounting plate (4), and a pipeline (6) for transportation is fixedly connected to the side of the chuck (5).

4. The ultra-high pressure bidirectional sealing gate valve according to claim 3, characterized in that: A screw (7) for fixing is inserted into the side of the chuck (5), and the screw (7) passes through the side of the chuck (5) and is threadedly connected to the side of the mounting plate (4).

5. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: A clamping sleeve (8) for limiting position is fixedly connected to the lower end of the valve cover (202), and a bolt (9) for fixing is inserted into the upper end of the valve cover (202).

6. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: The upper end of the top cover (205) is fixedly connected with a mounting tube (10) for positioning, and the upper end of the top cover (205) is plugged with a positioning pin (11) for fixing.

7. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: A pin (12) for fixing is inserted into the upper end of the dust cover (206), and a sealing gasket is provided on the inner side wall of the dust cover (206).

8. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: The top end of the valve stem (301) is fixedly connected to a connection disk (13) for positioning, and the outer surface of the connection disk (13) is fixedly connected to a hand wheel (14) for rotation.

9. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: The upper end of the elastic valve seat (302) is fixedly connected to a fixing tube (15) for positioning, and the upper end of the fixing tube (15) is provided with a clamping hole for positioning.

10. The ultra-high pressure bidirectional sealing gate valve according to claim 1, characterized in that: A circular disc (16) for connection is fixedly connected to the lower end of the elastic valve seat (302), and a clamping shaft (17) for positioning is fixedly installed to the lower end of the circular disc (16).

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