Gate valve structure with check valve
By integrating a check valve into the gate valve structure, the working state is automatically adjusted by the valve core and compression spring, which solves the problem of medium backflow when compressing gas, improves compressor efficiency, reduces clearance volume, and achieves faster opening and closing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING XINGYOU TECH CO LTD
- Filing Date
- 2025-08-18
- Publication Date
- 2026-06-26
AI Technical Summary
Existing gate valves suffer from low efficiency due to backflow of the outlet medium during gas compression, and the large clearance volume when a check valve is installed far from the gate valve further reduces the compressor efficiency.
A check valve is integrated into the gate valve structure, including a valve core, valve sleeve and compression spring. The working state is automatically switched by the medium pressure, which reduces medium backflow and optimizes the fluid passage, and reduces clearance volume.
The problem of medium backflow was solved, the efficiency of the compressor was improved, and the clearance volume was reduced, enabling faster opening and closing.
Smart Images
Figure CN224414459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, and in particular to a gate valve structure with a check valve. Background Technology
[0002] Existing gate valve technology can solve some practical engineering problems and has achieved good results.
[0003] In practice, the applicant found the following problems with the gate valve of the above technology: when the gas content in the medium is large, such as in the application of compressors, the medium is discharged from the equipment through the gate valve. However, when there is no check valve at the outlet, the outlet medium backflow leads to low efficiency. If a check valve is installed far away from the gate valve, the clearance volume is large, which makes the compressor less efficient. Utility Model Content
[0004] I. Technical problems to be solved
[0005] This invention aims to solve at least partially one of the aforementioned technical problems.
[0006] II. Technical Solution
[0007] This utility model provides a gate valve structure with a one-way valve. The gate valve structure with a one-way valve includes: a valve body, which internally forms N valve spaces, N≥1; the first end of each valve space is connected to a fluid inlet, and a step is formed at the first end; the second end of each valve space is connected to a fluid outlet; N valve bodies, each valve body installed within a corresponding valve space, each valve body including: a valve core, a valve sleeve, and a compression spring; wherein: the valve core includes: a valve core seat, a pressure ball, and a spherical spring seat; the valve core seat includes: a base plate, mounted on the step at the first end of the valve space, with a first flow hole in its middle connecting to the fluid inlet; an outer cylinder, formed on the side of the base plate away from the fluid interface, internally forming a... The valve core seat has an installation space; a spherical spring seat is installed in the installation space of the outer cylinder of the valve core seat; a pressure ball is fixed to the concave spherical end of the spherical spring seat and presses against the first flow hole; the outer side of the valve sleeve is fixed to the valve body, and its inner side forms a movable space, which allows the outer cylinder of the valve core seat to move up and down; the first end of the compression spring presses against the bottom wall of the movable space inside the valve sleeve; the second end presses against the pressing end of the spherical spring seat; wherein, there is a first gap between the outer periphery of the bottom plate of the valve core seat and the side wall of the valve space on the opposite side; at the position of the pressure ball, the outer cylinder of the valve core seat forms a second gap; there is a third gap between the outer cylinder of the valve core seat, the valve sleeve and the inner wall of the valve space on the opposite side.
[0008] In some embodiments of this utility model, the following condition is satisfied: 0.1L≤L1≤0.5L, where L is the diameter of the first flow hole and L1 is the distance of the first gap.
[0009] In some embodiments of this utility model, the second gap is: M circular holes opened on the outer periphery of the pressure ball on the outer cylinder of the valve core seat; the M circular holes are evenly arranged on the outer periphery of the pressure ball on the outer cylinder of the valve core seat, and M≥2.
[0010] In some embodiments of this utility model, four valve spaces are formed inside the valve body; each pair of valve bodies forms a valve group, and the two valve bodies in the valve group are respectively installed into the corresponding valve spaces. The valve group is fixed to the valve body by fixing bolts between the two valve bodies.
[0011] In some embodiments of this utility model, the valve space is a cylindrical space; on a plane perpendicular to the central axis of the cylindrical space, the projection of the valve core seat is circular.
[0012] In some embodiments of this utility model, the installation space inside the outer cylinder of the valve core seat is a cylindrical space; the outer circumferential surface of the spherical spring seat is cylindrical to match the cylindrical space.
[0013] III. Beneficial Effects
[0014] As can be seen from the above technical solution, the present invention has at least one of the following beneficial effects compared with the prior art:
[0015] (1) A check valve was added to the gate valve, which solved the problem of low efficiency caused by backflow of the outlet medium when compressing gas;
[0016] (2) By placing the check valve on the gate valve body, the clearance volume of the compressor is greatly reduced, and the efficiency of the compressor is improved.
[0017] (3) The one-way valve has multiple working states, and its specific working state is determined by the actual working conditions. It has a lower opening pressure and a faster closing speed. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the gate valve structure with a check valve according to an embodiment of the present invention.
[0019] Figure 2 for Figure 1 The diagram shows the structure of the valve body in the gate valve structure shown.
[0020] Figure 3 for Figure 1 The diagram shows the structure of the valve group consisting of two valve bodies in the gate valve structure shown.
[0021] Figure 4 for Figure 3 A schematic diagram of the mechanism of a single valve body in the valve group shown.
[0022] Figure 5 for Figure 4 The diagram shows the structure of the valve core seat in the valve body.
[0023] Figure 6A and Figure 6B They are respectively Figure 1 The diagrams shown are schematic representations of the gate valve structure in its first and second open states. Detailed Implementation
[0024] This utility model adds a check valve to the gate valve, which can automatically switch between different states according to the state of the fluid medium, thus solving the problem of low efficiency caused by backflow of the outlet medium when compressing gas.
[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and with reference to the accompanying drawings.
[0026] Figure 1 This is a schematic diagram of the gate valve structure with a check valve according to an embodiment of the present invention. Figure 2 for Figure 1 The diagram shows the structure of the valve body in the gate valve structure shown. Figure 3 for Figure 1 The diagram shows the structure of the valve group consisting of two valve bodies in the gate valve structure shown. Figure 4 for Figure 3 A schematic diagram of the mechanism of a single valve body in the valve group shown. Figure 5 for Figure 4 The diagram shows the structure of the valve core seat in the valve body. Figure 6A and Figure 6B They are respectively Figure 1 The diagrams shown are schematic representations of the gate valve structure in its first and second open states.
[0027] Please refer to the attached drawings. The gate valve structure with a check valve in this embodiment includes: a valve body 100 and four valve bodies 200. The four valve bodies are arranged in pairs, with each pair forming a valve assembly. Each valve assembly is fixed to the valve body as a whole by bolts 300. The valve body 100 internally forms four valve spaces 110, the first end of which is connected to the fluid inlet O. in A step 111 is formed at the first end; the second end of the valve space is connected to the fluid outlet O. out .
[0028] Regarding the valve body and valve frame, the following aspects need to be explained:
[0029] 1. Number of valve bodies
[0030] In this embodiment, the gate valve structure includes four valve bodies. However, this invention is not limited to this. In other embodiments of this invention, the gate valve structure may include N valve bodies, where N ≥ 1.
[0031] 2. Valve assembly
[0032] In this embodiment, every two valve bodies form a valve group, which facilitates the installation and fixing of the valve bodies. However, this utility model is not limited to this. In other embodiments of this utility model, each valve body can be installed and fixed individually, or three, four, five or more valve bodies can be combined into a valve group.
[0033] 3. Shape of the valve space
[0034] In this embodiment, the valve space is a cylindrical space; the projection of the valve core seat on a plane perpendicular to the central axis of the cylindrical space is circular. However, this invention is not limited to this. In other embodiments of this invention, the shape of the valve space only needs to correspond to the shape of the bottom plate in the valve core seat.
[0035] Those skilled in the art should understand that, including but not limited to the above-mentioned variations, the present invention can also be implemented and is also within the protection scope of the present invention.
[0036] Please refer to the attached diagram. Each valve body is installed in the corresponding valve space. Each valve body 200 includes: valve core 210, valve sleeve 220, and compression spring 230.
[0037] The valve core 210 includes: a valve core seat 211, a pressure ball 212, and a spherical spring seat 213. The valve core seat includes: a base plate 211A, mounted on a step at the first end of the valve space, with a first flow hole 211B in its middle that connects to the fluid inlet; and an outer cylinder 211C, formed on the side of the base plate away from the fluid interface, with an installation space inside. The spherical spring seat 213 is installed in the installation space of the outer cylinder of the valve core seat; the pressure ball 212 is fixed to the concave spherical end of the spherical spring seat and presses against the first flow hole 211B.
[0038] The valve core seat has a cylindrical mounting space inside its outer cylinder; the spherical spring seat has a cylindrical outer surface that matches the cylindrical space. The pressure ball 212 is a stainless steel ball.
[0039] The outer side of the valve sleeve 220 is fixed to the valve body, and its inner side forms a movable space for the outer cylinder of the valve core seat to move up and down. The first end of the compression spring 230 presses against the bottom wall of the movable space inside the valve sleeve; the second end presses against the pressing end of the spherical spring seat.
[0040] There is a first gap S1 between the outer periphery of the bottom plate of the valve core seat and the side wall of the opposite valve space; a second gap S2 is formed in the outer cylinder of the valve core seat at the position of the pressure ball; and a third gap S3 is formed between the outer cylinder of the valve core seat, the valve sleeve and the inner wall of the opposite valve space.
[0041] For the first gap S1, it satisfies: 0.1L≤L1≤0.5L. Where L is the diameter of the first flow orifice and L1 is the distance of the first gap.
[0042] like Figure 5 As shown, the second gap is S2: M circular holes, M ≥ 1, are formed on the outer cylinder of the valve core seat around the pressure ball. The number of holes M is determined by the outer diameter of the outer cylinder. Generally, the M holes are evenly distributed on the outer cylinder, M ≥ 4. This arrangement facilitates the uniform release of fluid pressure from around the outer cylinder.
[0043] Regarding the gate valve structure with a check valve in this embodiment, its operating state is determined by operating conditions such as medium pressure, flow rate, and viscosity. Possible operating states include:
[0044] 1. Off state
[0045] like Figure 1 As shown, the valve core seat 211 is pressed against the step, and the pressure ball 212 is pressed against the first flow hole;
[0046] 2. First Opening State
[0047] like Figure 6A As shown, at the fluid inlet O in The pressure ball 212 moves upward under the action of the fluid medium and separates from the valve core seat 211, opening the first flow orifice. The first flow orifice, the second gap, and the third gap form the first fluid channel. The fluid medium flows to the fluid outlet O through the first fluid channel. out .
[0048] 3. Second Opening State
[0049] like Figure 6B As shown, the valve core seat moves upward under the action of the medium and separates from the sealing surface of the valve body 31. The gap between the valve core seat and the step, the first gap, and the third gap form the second fluid channel. The fluid medium flows to the fluid outlet O through the second fluid channel. out .
[0050] Those skilled in the art should understand that the working state of a one-way valve is determined by the working conditions such as medium pressure, flow rate, and viscosity. It may be any of the following states: closed, first open, or second open, or both states A and B may occur simultaneously.
[0051] As can be seen from the above description, the gate valve structure with a check valve in this embodiment has the following beneficial effects:
[0052] (1) A check valve was added to the gate valve, which solved the problem of low efficiency caused by backflow of the outlet medium when compressing gas;
[0053] (2) By placing the check valve on the gate valve body, the clearance volume of the compressor is greatly reduced, and the efficiency of the compressor is improved.
[0054] (3) The one-way valve has two working states, and its specific working state is determined by the actual working conditions. The opening pressure is smaller and the closing is faster.
[0055] This concludes the description of all embodiments of this utility model. Based on the above description, those skilled in the art should have a clear understanding of this utility model.
[0056] It should be noted that for some implementation methods, if they are not key contents of this utility model and are well known to those skilled in the art, they are not described in detail in the accompanying drawings or text due to space limitations. In such cases, relevant prior art can be referred to for understanding.
[0057] Unless explicitly stated otherwise, the numerical values and ranges mentioned in this utility model are approximate and can be changed according to the content of this utility model. Specifically, all figures in the specification and claims indicating the content of composition, reaction conditions, etc., should be understood to be modified by the term "about" in all cases, which means that they include a specific quantity varying by ±10% in some embodiments.
[0058] The directional terms used in this utility model, such as "center," "lateral," "longitudinal," "top," "bottom," "upper," "lower," "front," "rear," "left," "right," "inner," and "outer," indicate only the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, throughout the accompanying drawings, the same elements are represented by the same or similar reference numerals. Also, the shapes and dimensions of the components in the drawings do not reflect actual size and proportion, but only illustrate the content of embodiments of this utility model.
[0059] The terms "connected" and "linked" used in this utility model should be interpreted broadly unless otherwise explicitly specified and limited. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the connection of a portion of two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0060] Those skilled in the art will understand that in the claims and description of this utility model, the word "comprising" does not exclude the presence of elements (or steps) not listed in the claims. The word "a" or "an" preceding an element (or step) does not exclude the presence of a plurality of such elements (or steps).
[0061] Furthermore, the purpose of providing the above embodiments is merely to enable the present invention to meet legal requirements, and the present invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein.
[0062] Similarly, it should be understood that, for the sake of brevity, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together in a single embodiment, figure, or description thereof. However, this approach should not be construed as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, each aspect of the invention comprises fewer than all the features of the preceding single embodiment. Furthermore, embodiments may be used in combination with each other or with other embodiments based on design and reliability considerations; that is, technical features from different embodiments can be freely combined to form more embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the present invention.
[0063] The above specific embodiments have provided a detailed description of the purpose, technical means, and beneficial effects of this utility model. It should be understood that the purpose of the detailed description is to enable those skilled in the art to understand this utility model more clearly, and it is not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A gate valve structure with a check valve, characterized in that, include: The valve body has N valve spaces inside, where N≥1. The first end of each valve space is connected to the fluid inlet, and a step is formed at the first end. The second end of each valve space is connected to the fluid outlet. There are N valve bodies, each installed in a corresponding valve space. Each valve body includes: a valve core, a valve sleeve, and a compression spring; wherein: The valve core includes: a valve core seat, a pressure ball, and a spherical spring seat; the valve core seat includes: a base plate, mounted on a step at the first end of the valve space, with a first flow hole in its middle communicating with the fluid inlet; an outer cylinder, formed on the side of the base plate away from the fluid interface, with an installation space inside; the spherical spring seat is installed in the installation space of the outer cylinder of the valve core seat; the pressure ball is fixed to the concave spherical end of the spherical spring seat and presses against the first flow hole; The outer side of the valve sleeve is fixed to the valve body, and its inner side forms a movable space, which allows the outer cylinder of the valve core seat to move up and down. The first end of the compression spring presses against the bottom wall of the inner movable space of the valve sleeve; the second end presses against the pressing end of the spherical spring seat. The valve core seat has a first gap between its base plate and the side wall of the opposite valve space; the valve core seat has a second gap at the outer edge of the pressure ball; and there is a third gap between the outer cylinder of the valve core seat, the valve sleeve, and the inner wall of the opposite valve space.
2. The gate valve structure with a check valve according to claim 1, characterized in that, satisfy: 0.1L≤L1≤0.5L Where L is the diameter of the first flow hole and L1 is the distance of the first gap.
3. The gate valve structure with a check valve according to claim 1, characterized in that, The second gap consists of M circular holes located around the pressure ball on the outer cylinder of the valve core seat. The M circular holes are evenly arranged around the pressure ball on the outer cylinder of the valve core seat, where M ≥ 2.
4. The gate valve structure with a check valve according to claim 1, characterized in that, The valve body has four valve spaces inside; Each pair of four valve bodies forms a valve group. The two valve bodies in the valve group are installed into the corresponding valve space. The valve group is fixed to the valve body by fixing bolts between the two valve bodies.
5. The gate valve structure with a check valve according to any one of claims 1 to 4, characterized in that, The valve space is a cylindrical space; The projection of the valve core seat is circular on a plane perpendicular to the central axis of the cylindrical space.
6. The gate valve structure with a check valve according to any one of claims 1 to 4, characterized in that, The installation space inside the outer cylinder of the valve core seat is a cylindrical space; The outer circumferential surface of the spherical spring seat is cylindrical, matching the cylindrical space.