A frictionless double gate valve

Abstract

The utility model discloses a kind of frictionless double-gate plate gate valves, belong to gate valve technical field. Mainly including gate valve body, the gate valve body includes valve body, the upper end of the valve body is equipped with valve cover, the inside of the valve body is provided with mounting block, the first gate plate is rotatably installed in the side of the mounting block, the second gate plate is rotatably installed in the other side of the mounting block, the first gate plate, second gate plate and valve body between being provided with for guiding first gate plate and second gate plate and allowing it to deflect guide portion, the upper end of the valve cover is provided with for driving the drive portion of first gate plate and second gate plate movement. A kind of frictionless double-gate plate gate valve of the application, through the design of scraper in cleaning component, scale, crystallization and solid particles on sealing surface are synchronously scraped off when gate plate is lifted, avoid impurities to be clamped between gate valve sealing surface and sealing ring, guarantee sealing reliability, improve its practicality.

Description

Technical Field

[0001] This utility model relates to the field of gate valve technology, specifically a frictionless double-gate valve. Background Technology

[0002] Gate valves, as key shut-off valves in industrial pipeline systems, are widely used in various industrial fields such as petroleum, chemical, power, water supply and drainage, metallurgy, and natural gas due to their advantages of simple structure, strong flow capacity, and short opening and closing stroke. Their core function is to achieve rapid connection or complete cut-off of pipeline media through the lifting and lowering movement of the gate, making them an important basic component for ensuring the continuous and safe operation of industrial production processes.

[0003] In real-world industrial applications, the media transported through pipelines are complex and diverse. In the petrochemical industry, the media often contain crude oil residues, asphalt, sulfides, and other components that are prone to scaling and corrosion. In the power industry, the high temperature and pressure environment in steam pipelines can cause minerals in the water to precipitate and form scale. In water supply and drainage systems, the media may contain silt, suspended solids, and other solid particles. Natural gas pipelines may contain impurities such as condensate oil and dust.

[0004] However, after prolonged use, scale, crystals, and solid particles in the medium can easily adhere to the gate sealing surface of some existing gate valves. If not cleaned in time, these impurities will be squeezed between the sealing surface and the sealing ring when the valve is closed, causing the sealing surface to fail to fit tightly, forming a sealing gap, and causing medium leakage. Scale may also cause the gate to jam, making it unable to open and close normally, affecting the continuity of industrial production.

[0005] Therefore, it is necessary to provide a frictionless double gate valve to solve the above problems.

[0006] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a frictionless double gate valve, which solves the problem that after long-term use, scale, crystals and solid particles in the medium in some gate valves are easy to adhere to the gate sealing surface and are difficult to clean.

[0008] The technical solution adopted by this application to solve its technical problem is: a frictionless double gate valve, including a gate valve body, the gate valve body including a valve body, a valve cover installed at the upper end of the valve body, an installation block provided inside the valve body, a first gate plate rotatably installed on one side of the installation block, and a second gate plate rotatably installed on the other side of the installation block.

[0009] A guide portion is provided between the first gate, the second gate, and the valve body for guiding the first gate and the second gate and allowing them to deflect. A drive portion is provided at the upper end of the valve cover for driving the first gate and the second gate to move.

[0010] The valve body is equipped with a cleaning component for cleaning the sealing surfaces of the first and second gates.

[0011] Furthermore, the cleaning assembly includes mounting cavities formed on both sides inside the valve body. Multiple third springs are installed inside each of the two mounting cavities. A mounting plate is installed on one side of each third spring, and a scraper is installed on one side of each mounting plate.

[0012] Furthermore, the guide portion includes guide plates installed on both sides of the first gate and the second gate. Both sides of the valve body are provided with guide grooves adapted to the guide plates. The guide plates are slidably disposed in the guide grooves, and the width of the guide grooves is greater than the thickness of the guide plates, so that the first gate and the second gate can deflect at a certain angle.

[0013] Furthermore, a first spring is installed at the upper end between the first gate and the second gate, and a second spring is installed at the lower end between the first gate and the second gate. A wedge block is installed on the inner bottom surface of the valve body. The wedge block is located between the first gate and the second gate, and its inclined surface cooperates with the inclined surface inside the first gate and the second gate.

[0014] Furthermore, the drive unit includes a valve stem threadedly mounted inside the upper end of the valve cover, the lower end of the valve stem being rotatably mounted on the upper end of the mounting block, and a knob being mounted on the upper end of the valve stem.

[0015] Furthermore, a sealing gasket is provided between the valve body and the valve cover, and connecting flanges are integrally formed on both sides of the valve body.

[0016] Furthermore, sealing rings are provided on both sides of the flow channel inside the valve body, and the side of the first gate and the second gate that is far apart is the sealing surface. The two sealing rings are respectively attached to the sealing surfaces of the first gate and the second gate.

[0017] The beneficial effects of this application are: the frictionless double gate valve provided by this application, through the design of the scraper in the cleaning component, simultaneously scrapes away scale, crystals and solid particles on the sealing surface when the gate is raised and lowered, avoiding impurities from being trapped between the gate valve sealing surface and the sealing ring, thus ensuring sealing reliability.

[0018] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is an overall schematic diagram of a frictionless double-gate valve according to this application;

[0021] Figure 2 This is a cross-sectional structural schematic diagram of a frictionless double-gate valve according to this application;

[0022] Figure 3 This is a partial structural schematic diagram of a frictionless double-gate valve according to this application;

[0023] Figure 4 This is a schematic diagram of the cleaning assembly structure of a frictionless double-gate valve according to this application;

[0024] The following are the labeling elements in the figure:

[0025] 1. Gate valve body; 11. Valve body; 12. Valve cover; 13. Sealing gasket; 14. Mounting block; 15. First gate; 16. Second gate; 17. First spring; 18. Second spring; 19. Wedge block; 110. Valve stem; 111. Knob; 2. Cleaning assembly; 21. Mounting cavity; 22. Third spring; 23. Mounting plate; 24. Scraper; 3. Connecting flange; 4. Sealing ring. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0028] like Figure 1-4As shown, this application provides a frictionless double gate valve, including a gate valve body 1, which includes a valve body 11. A valve cover 12 is fixedly installed on the upper end of the valve body 11 by bolts. The bolt connection allows for the detachable fixing of the valve cover 12 and the valve body 11, facilitating the inspection and maintenance of internal components in the future. A sealing gasket 13 is provided between the valve body 11 and the valve cover 12. The sealing gasket 13 is made of elastic sealing material. When the bolts are tightened, the sealing gasket 13 is compressed and fills the gap between the mating surfaces of the valve cover 12 and the valve body 11, blocking fluid leakage from the mating surface and forming the first line of sealing defense.

[0029] Both sides of the valve body 11 are integrally formed with connecting flanges 3. The connecting flanges 3 can be connected to the pipeline system by bolts. The integrally formed structure avoids the stress concentration problem of welding connection, improves the sealing performance and structural strength of the valve body 11 and pipeline connection, and ensures the stable operation of the gate valve in high-pressure fluid scenarios.

[0030] The valve body 11 has an internal mounting block 14. A first gate 15 is rotatably mounted on one side of the mounting block 14, and a second gate 16 is rotatably mounted on the other side. The rotatable connection provides freedom for the lateral opening and closing of the first gate 15 and the second gate 16. Guide plates (not shown in the figure) are provided on both sides of the first gate 15 and the second gate 16. Guide grooves (not shown in the figure) are provided on both sides of the valve body 11. The guide plates slide inside the guide grooves, and the size of the guide grooves is slightly larger than the guide plates. The movement direction of the gate is restricted by the cooperation between the guide plates and the guide grooves, ensuring that the gate can only move vertically up and down along the guide grooves, while also reserving a certain rotation angle space for the gate to meet the lateral opening and closing requirements when the gate cooperates with the wedge block 19.

[0031] A first spring 17 is fixedly installed at the upper end between the first gate 15 and the second gate 16, and a second spring 18 is fixedly installed at the lower end. Both springs are always in a pre-tensioned state, generating an inward pulling force to bring the first gate 15 and the second gate 16 closer together. This pre-tensioning force keeps the gate in a closed state during the lifting and lowering process (when not in contact with the wedge block 19), preventing the gate from rubbing against the inner wall of the valve body 11 and the sealing ring 4. At the same time, the elastic return function of the spring provides power for the gate to reset when it opens, ensuring smooth opening of the gate.

[0032] A wedge block 19 is fixedly installed on the inner bottom surface of the valve body 11. The wedge block 19 is located between the first gate 15 and the second gate 16. Its inclined surface is precisely matched with the inclined surface inside the first gate 15 and the second gate 16 to form a wedge-shaped drive structure. Sealing rings 4 are provided on both sides of the flow channel inside the valve body 11. The sealing rings 4 are made of wear-resistant and media corrosion-resistant elastic material. The side of the first gate 15 and the second gate 16 that is far away from each other is a precision-machined sealing surface. The sealing rings 4 are in contact with the sealing surface.

[0033] When the gate valve is in the open state, the first gate 15 and the second gate 16 remain closed under the action of spring tension, and their sealing surfaces are separated from the sealing ring 4. The fluid can pass smoothly through the flow channel, and the sealing surfaces do not contact the sealing ring 4 during the raising and lowering of the gate, thus avoiding friction and wear and extending the service life of the sealing ring 4 and the gate.

[0034] When the gate valve needs to be closed, the drive unit drives the mounting block 14 to descend, and the gate plate descends synchronously with the mounting block 14. When the inner inclined surface of the gate plate contacts the inclined surface of the wedge block 19, the wedge block 19 generates an outward lateral force on the gate plate. This force overcomes the spring tension and pushes the first gate plate 15 and the second gate plate 16 to open to both sides. As the mounting block 14 continues to descend, the lateral force gradually increases until the gate plate descends to the lowest point of the valve body 11, at which point the sealing surface and the sealing ring 4 are tightly fitted. The inclined surface design of the wedge block 19 makes the sealing force increase synchronously with the descent depth of the gate plate, ensuring that the sealing surface and the sealing ring 4 form an interference fit, blocking fluid leakage and achieving reliable sealing.

[0035] like Figure 2-4 As shown, the upper end of the valve cover 12 is provided with a drive unit for driving the first gate 15 and the second gate 16 to rise and fall. The drive unit includes a valve stem 110 threadedly installed inside the upper end of the valve cover 12. The valve stem 110 and the internal thread of the valve cover 12 form a threaded pair. The lower end of the valve stem 110 is rotatably installed on the upper end of the mounting block 14 through a bearing. This rotatable connection design ensures that when the valve stem 110 rotates, it only drives the mounting block 14 to move up and down, avoiding the transmission of the rotational torque of the valve stem 110 to the gate and causing jamming. A knob 111 is fixedly installed on the upper end of the valve stem 110 to provide a convenient force application point for the operator.

[0036] When the gate valve needs to be closed, turning the knob 111 clockwise rotates the valve stem 110. Due to the restriction of the internal thread of the valve cover 12, the valve stem 110 moves downward axially while rotating, pushing the mounting block 14 down along the guide direction, which in turn drives the gate to descend synchronously, ultimately achieving a tight seal between the sealing surface and the sealing ring 4. When the gate valve needs to be opened, turning the knob 111 counterclockwise rotates the valve stem 110 in the opposite direction. The valve stem 110 moves upward axially, pulling the mounting block 14 up. After the gate rises with the mounting block 14 and disengages from the wedge block 19, it closes towards the center under the tension of the first spring 17 and the second spring 18, separating the sealing surface from the sealing ring 4 and opening the flow channel. The self-locking characteristic of the threaded drive allows the gate valve to remain stable at any opening height without the need for an additional locking mechanism, adapting to different flow regulation requirements.

[0037] like Figure 3-4As shown, the valve body 11 is internally equipped with a cleaning component 2 for cleaning the gate sealing surface. This component is designed to prevent scale, crystals, or solid particles that may be present in the fluid from adhering to the sealing surface and affecting the sealing effect. The cleaning component 2 includes mounting cavities 21 located on both sides of the valve body 11. Multiple third springs 22 are fixedly installed inside each mounting cavity 21. The third springs 22 are in a pre-tightened state, providing continuous clamping force to the scraper 24. A mounting plate 23 is fixedly installed on one side of the third spring 22. The mounting plate 23 is slidably installed in the mounting cavity 21. A scraper 24 is fixedly installed on one side of the mounting plate 23. The scraper 24 is made of wear-resistant plastic to prevent scratching the sealing surface.

[0038] Under the preload of the third spring 22, the two scrapers 24 are always in contact with the sealing surfaces of the first gate 15 and the second gate 16. When the valve stem 110 lifts the gate to open, the gate moves upward along the guide groove, and the sealing surface slides relative to the scraper 24. The scraper 24 can scrape off the scale, crystals, or solid particles attached to the sealing surface; the scraped impurities can be discharged with the fluid. The cleaning process requires no additional operation and is carried out synchronously with the gate opening action, ensuring that the sealing surface is clean after each opening, avoiding impurities from being trapped between the sealing surface and the sealing ring 4, which could lead to sealing failure. At the same time, it reduces wear on the sealing surface and extends the service life of the gate valve.

[0039] Working principle: When the gate valve needs to be opened to allow fluid flow, the operator rotates the knob 111 at the upper end of the valve stem 110 counterclockwise. The valve stem 110 and the internal thread of the valve cover 12 form a threaded pair. Under the constraint of the thread, the valve stem 110 rotates and moves upward axially at the same time. The lower end of the valve stem 110 is rotatably connected to the mounting block 14 through the bearing, which avoids the rotational torque being transmitted to the gate. Only the mounting block 14 is pulled up along the guide direction, thereby driving the first gate 15 and the second gate 16 to rise synchronously.

[0040] During the upward movement of the gate, the third spring 22 inside the mounting cavity 21 is in a pre-tightened state, pushing the mounting plate 23 so that the scraper 24 always adheres to the sealing surfaces of the first gate 15 and the second gate 16. The first gate 15, the second gate 16 and the scraper 24 slide relative to each other. The scraper 24 scrapes off the scale, crystals or solid particles attached to the sealing surface, and the scraped impurities are discharged with the subsequent fluid flow.

[0041] During the gate's ascent, the cleaning component 2 operates simultaneously. Multiple third springs 22 fixed inside the mounting cavity 21 are evenly distributed and always in a pre-compressed state, converting elastic potential energy into a continuous horizontal thrust acting on the mounting plate 23. The mounting plate 23 slides against the inner wall of the mounting cavity 21, allowing it to move flexibly in the horizontal direction, ensuring that the thrust is smoothly transmitted to the scraper 24. The scraper 24 is made of high-strength wear-resistant plastic material, and its contact surface has been precisely polished to ensure scraping hardness while avoiding scratching the gate's precision sealing surface. Furthermore, the contact between the scraper 24 and the sealing surface is a surface contact design.

[0042] Under the continuous thrust of the third spring 22, the scraper 24 always fits tightly against the gate sealing surface. When the gate moves upward along the guide groove, relative sliding occurs between the sealing surface and the scraper 24. The scraper 24 scrapes off the scale, crystals or solid particles and other impurities attached to the sealing surface by means of the friction of the relative motion. The scraped impurities are flushed out of the valve body 11 during subsequent fluid flow.

[0043] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A frictionless double-gate valve, comprising a valve body (1), wherein the valve body (1) includes a valve body (11), and a valve cover (12) is mounted on the upper end of the valve body (11), characterized in that: The valve body (11) is provided with an installation block (14) inside. A first gate (15) is rotatably installed on one side of the installation block (14), and a second gate (16) is rotatably installed on the other side of the installation block (14). A guide portion is provided between the first gate (15), the second gate (16) and the valve body (11) for guiding the first gate (15) and the second gate (16) and allowing them to deflect. A drive portion is provided at the upper end of the valve cover (12) for driving the first gate (15) and the second gate (16) to move. The valve body (11) is provided with a cleaning component (2) for cleaning the sealing surfaces of the first gate (15) and the second gate (16).

2. The frictionless double-gate valve according to claim 1, characterized in that: The cleaning component (2) includes mounting cavities (21) opened on both sides inside the valve body (11). Multiple third springs (22) are installed inside each of the two mounting cavities (21). A mounting plate (23) is installed on one side of the third spring (22), and a scraper (24) is installed on one side of the mounting plate (23).

3. The frictionless double-gate valve according to claim 1, characterized in that: The guide section includes guide plates installed on both sides of the first gate (15) and the second gate (16). Both sides of the valve body (11) are provided with guide grooves that are adapted to the guide plates. The guide plates are slidably disposed in the guide grooves, and the width of the guide grooves is greater than the thickness of the guide plates, so that the first gate (15) and the second gate (16) can deflect at a certain angle.

4. The frictionless double-gate valve according to claim 3, characterized in that: A first spring (17) is installed at the upper end between the first gate (15) and the second gate (16), and a second spring (18) is installed at the lower end between the first gate (15) and the second gate (16). A wedge block (19) is installed on the inner bottom surface of the valve body (11). The wedge block (19) is located between the first gate (15) and the second gate (16), and its inclined surface cooperates with the inclined surface inside the first gate (15) and the second gate (16).

5. The frictionless double-gate valve according to claim 1, characterized in that: The drive unit includes a valve stem (110) threaded inside the upper end of the valve cover (12), the lower end of the valve stem (110) being rotatably mounted on the upper end of the mounting block (14), and a knob (111) being mounted on the upper end of the valve stem (110).

6. The frictionless double-gate valve according to claim 1, characterized in that: A sealing gasket (13) is provided between the valve body (11) and the valve cover (12), and a connecting flange (3) is integrally formed on both sides of the valve body (11).

7. The frictionless double-gate valve according to claim 1, characterized in that: Sealing rings (4) are provided on both sides of the flow channel inside the valve body (11). The side of the first gate (15) and the second gate (16) that is far apart is the sealing surface. The two sealing rings (4) are respectively attached to the sealing surfaces of the first gate (15) and the second gate (16).

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