A non-reverse fluid control device

Abstract

This application relates to a non-reverse flow control device, comprising: a valve body having a through channel inside, and a first stepped surface extending towards the center on the inner wall of the valve body; a valve sleeve disposed within the valve body, and the valve sleeve abutting against the first stepped surface on the inner wall of the valve body to restrict axial movement of the valve sleeve, and a second stepped surface extending towards the center on the inner wall of the valve sleeve; this utility model uses the first stepped surface to axially position the valve sleeve and the valve body, and the second stepped surface to axially position the valve sleeve and the valve seat, enabling rapid assembly of components during assembly, improving assembly efficiency, and simultaneously welding the valve body, valve sleeve, and valve seat to prevent deformation of components caused by sequential welding, and the aforementioned stepped surface design ensures structural stability even after long-term use, thus extending the service life of the valve.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a non-reverse fluid control device. Background Technology

[0002] A fluid control valve that allows fluid to flow in only one direction and automatically prevents reverse flow. This type of valve typically uses the pressure of the fluid itself to open the valve core when flowing in the forward direction and automatically close it when flowing in the reverse direction, thereby preventing backflow of the medium and protecting the safety of the pipeline system.

[0003] Existing valves typically consist of main components such as a valve body, valve sleeve, and valve seat, which are mostly fixed together by welding. However, in actual production, traditional welded structures have certain shortcomings: because components are welded one at a time, the high temperatures and thermal deformation generated during subsequent welding processes can easily deform or damage previously welded areas, thus affecting weld quality and structural strength. Furthermore, existing technologies often rely solely on welding for fixation, lacking axial positioning structures between components. Under long-term conditions of fluid impact and vibration, welds may loosen or even fail, reducing the valve's service life and reliability. Utility Model Content

[0004] To address the problems mentioned in the background art, such as the easy deformation and damage of the previously welded parts during the welding process of existing valves, and the lack of an axial positioning structure leading to loosening during long-term use, this application provides a non-return fluid control device.

[0005] The non-reverse flow control device provided in this application adopts the following technical solution:

[0006] A non-reverse fluid control device, comprising:

[0007] The valve body has a through channel inside, and the inner wall of the valve body has a first stepped surface extending towards the center.

[0008] A valve sleeve is disposed within the valve body, and the valve sleeve abuts against a first stepped surface on the inner wall of the valve body to restrict axial movement of the valve sleeve. The inner wall of the valve sleeve is provided with a second stepped surface extending towards the center.

[0009] A valve seat is disposed in the valve body and has a valve port formed in the inner cavity. One end of the valve seat abuts against the second step surface of the valve sleeve to axially limit the valve seat. A welding groove is formed on the outer wall of one end of the valve seat. Welding parts are installed in the welding groove and the valve seat, valve sleeve and valve body are welded and fixed.

[0010] The valve core is axially movable and installed in the valve body. When it moves to one extreme position, it can fit with the valve port to isolate the internal passage of the valve body. When it is removed from the valve port, the internal passage of the valve body is in a conductive state.

[0011] By adopting the above technical solution, the valve sleeve and valve body are axially positioned by the first step surface, and the valve sleeve and valve seat are axially positioned by the second step surface. This enables rapid assembly of components during assembly, improving the assembly effect. The valve body, valve sleeve, and valve seat are welded and fixed by synchronous welding to prevent deformation of components caused by sequential welding. Furthermore, the step surface design ensures structural stability even after long-term use, which helps extend the service life of the valve.

[0012] Optionally, the outer wall of the valve sleeve has a third stepped surface extending outward, which abuts against the first stepped surface.

[0013] By adopting the above technical solution, the third step surface can contact the first step surface, thereby enabling the valve sleeve to be axially positioned within the valve body, improving positioning accuracy and assembly efficiency.

[0014] Optionally, a first liquid passage hole is provided at the end of the valve sleeve.

[0015] By adopting the above technical solution, it is configured such that when the valve is open, fluid can enter the valve sleeve from the valve port, and then flow through the first liquid passage hole from the valve sleeve, thereby realizing the normal flow of fluid.

[0016] Optionally, a guide sleeve is fixed at the center of the valve sleeve, and a guide shaft is fixed at the center of the valve core, with the guide shaft slidably connected inside the guide sleeve.

[0017] By adopting the above technical solution, a guiding role is played when the valve core moves axially, so as to avoid the problem of the valve core swaying during axial movement.

[0018] Optionally, the valve core has a conical cup-shaped structure or a conical disc-shaped structure. When the valve core has a conical cup-shaped structure, a second liquid passage hole is provided in the circumferential direction of the valve core.

[0019] By adopting the above technical solution, different valve core structures can be designed according to actual needs, which can meet the check valve requirements under different working conditions. The second liquid passage is set to enable the fluid to quickly enter the cup body of the conical cup structure, which is conducive to the rapid closure of the valve core and improves the response speed.

[0020] Optionally, the valve core has a receiving cavity formed at the end away from the valve port.

[0021] By adopting the above technical solution, fluid can enter the receiving cavity during the valve closing process, thereby having a larger contact area with the valve core, prompting the valve core to close quickly and improving the response speed.

[0022] Optionally, a collar is fixedly installed at the end of the valve seat, the collar extending outward from the valve seat, and the end of the collar abutting against the second step surface of the valve sleeve.

[0023] By adopting the above technical solution, the collar is set to replace the valve seat, so that the valve sleeve can be fitted onto the integral structure formed by the valve seat and the collar, which is beneficial to improving the assembly accuracy of the valve sleeve.

[0024] Optionally, a liquid collection groove is provided in the middle of the outer wall of the valve sleeve. The welding liquid can flow into the connection position of the valve body, valve seat, valve sleeve and collar through the collection groove, so as to weld the valve body, valve seat, valve sleeve and collar simultaneously.

[0025] By adopting the above technical solution, the main purpose of setting up the liquid collection tank is to prevent welding turbulence and to collect the welding liquid.

[0026] Optionally, the valve body is integrally stamped and formed, with a constricted section at one end away from the valve port, and the inner wall of the constricted section has a flared trumpet-shaped structure.

[0027] By adopting the above technical solution, the valve body formed by one-piece stamping has the characteristics of high forming efficiency, which improves the production efficiency of parts. In addition, the constricted section is mainly used to connect external pipelines, so that the external pipelines can quickly connect to the valve body through the flared horn-shaped structure at the end.

[0028] Optionally, the inner wall of the valve seat has a recessed relief groove near the valve port, and the end of the inner hole of the valve seat has a flared trumpet-shaped structure.

[0029] The purpose of setting the clearance groove by adopting the above technical solution is that the external pipeline needs to be connected to the inner cavity of the valve seat. Therefore, setting the clearance groove at the root position near the valve port can prevent the pipeline from tilting inside the valve seat and improve the connection quality.

[0030] Optionally, the first stepped surface of the valve body is located near the end of the valve sleeve and abuts against the end of the valve sleeve.

[0031] By adopting the above technical solution, the first step surface is set near the end of the valve sleeve, which can also play an axial positioning role when the valve sleeve abuts against the first step.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] This invention uses a first stepped surface to axially position the valve sleeve and valve body, and a second stepped surface to axially position the valve sleeve and valve seat. This allows for rapid assembly of components, improving assembly efficiency. The valve body, valve sleeve, and valve seat are welded and fixed simultaneously to prevent deformation caused by sequential welding. Furthermore, the stepped surfaces ensure structural stability even after prolonged use, thus extending the valve's service life. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the valve core in the open state according to Embodiment 1 of this utility model;

[0035] Figure 2 This is a structural diagram of the valve core in the closed state according to Embodiment 1 of this utility model;

[0036] Figure 3 This is a perspective view of the concealed valve body according to Embodiment 1 of this utility model;

[0037] Figure 4 This is a structural diagram of the valve body according to Embodiment 1 of this utility model;

[0038] Figure 5 This is a structural diagram of the valve sleeve according to Embodiment 1 of this utility model;

[0039] Figure 6 This is a structural diagram of the valve seat according to Embodiment 1 of this utility model;

[0040] Figure 7 This is a structural diagram of the valve core in the open state according to Embodiment 2 of this utility model;

[0041] Figure 8 This is a structural diagram of the valve core in the closed state according to Embodiment 2 of this utility model;

[0042] Figure 9 This is a structural diagram of the valve core in the open state of Embodiment 3 of this utility model;

[0043] Figure 10 This is a structural diagram of the valve core in the closed state according to Embodiment 3 of this utility model;

[0044] Figure 11 This is a structural diagram of the valve core in the open state of Embodiment 4 of this utility model;

[0045] Figure 12 This is a structural diagram of the valve core in the closed state of Embodiment 4 of this utility model;

[0046] Figure 13 This is a structural diagram of the valve sleeve in Embodiment 4 of this utility model;

[0047] Figure 14This is a structural diagram of the valve seat in Embodiment 4 of this utility model;

[0048] Figure 15 This is a structural diagram of Embodiment 5 of this utility model;

[0049] Figure 16 This is a structural diagram of Embodiment Six of this utility model.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Valve body; 101. First stepped surface; 102. Narrowed section; 2. Valve sleeve; 201. Second stepped surface; 202. Third stepped surface; 203. First liquid passage hole; 3. Valve seat; 301. Valve port; 302. Welding groove; 303. Relief groove; 304. Liquid collection groove; 4. Valve core; 401. Second liquid passage hole; 402. Receiving cavity; 5. Welded component; 6. Guide sleeve; 7. Guide shaft; 8. Collar. Detailed Implementation

[0052] The present application will be further described in detail below with reference to the accompanying drawings.

[0053] Example 1

[0054] like Figure 1-6 As shown in the figure, this application discloses a non-return fluid control device, comprising:

[0055] The valve body 1 has a through channel inside, and the inner wall of the valve body 1 has a first stepped surface 101 extending towards the center.

[0056] A valve sleeve 2 is disposed inside the valve body 1, and the valve sleeve 2 abuts against a first stepped surface 101 on the inner wall of the valve body 1 to restrict the axial movement of the valve sleeve 2. The inner wall of the valve sleeve 2 is provided with a second stepped surface 201 extending towards the center. Specifically, the outer wall of the valve sleeve 2 has a third stepped surface 202 extending outward, and the third stepped surface 202 abuts against the first stepped surface 101 so that after the valve sleeve 2 is installed into the valve body 1 from one end, the third stepped surface 202 can abut against the first stepped surface 101, thereby axially limiting the valve sleeve 2.

[0057] A valve seat 3 is disposed within the valve body 1, and a valve port 301 is formed in the inner cavity. One end of the valve seat 3 abuts against the second step surface 201 of the valve sleeve 2, which is configured to axially limit the valve seat 3. An annular welding groove 302 is formed on the outer wall of one end of the valve seat 3. A welding component 5 is installed in the welding groove 302 to weld and fix the valve seat 3, valve sleeve 2, and valve body 1. Specifically, in this example, when the valve seat 3 is installed into the valve sleeve 2, the end of the valve sleeve 2 is just located at the edge of the welding groove 302. The welding component 5 is installed in the welding groove 302. The welding component 5 is melted by heating in a kiln. The welding liquid can flow into the gap between the valve body 1 and the valve sleeve 2, and into the gap between the valve sleeve 2 and the valve seat 3, so as to realize the synchronous welding of the valve body 1, valve sleeve 2, and valve seat 3, which is beneficial to improve the welding speed and welding quality. Specifically, the above-mentioned welding component 5 can be welded using welding rings, welding paste, welding blocks, welding rods, etc.

[0058] The valve core 4 is axially movable and installed inside the valve body 1. When it moves to one end limit position, it can fit with the valve port 301 to isolate the internal channel of the valve body 1. When it is removed from the valve port 301, the internal channel of the valve body 1 is in a conductive state.

[0059] Specifically, a first liquid passage hole 203 is provided at the end of the valve sleeve 2, such as... Figure 3 As shown, the number of first fluid passage holes 203 is set to three in this example, which are evenly distributed around the center of valve sleeve 2 to ensure normal fluid flow.

[0060] Specifically, a guide sleeve 6 is fixed at the center of the valve sleeve 2, and a guide shaft 7 is fixed at the center of the valve core 4. The guide shaft 7 is slidably connected inside the guide sleeve 6. The center lines of the guide shaft 7, guide sleeve 6, valve body 1, valve sleeve 2, and valve seat 3 are coaxial. Setting the guide sleeve 6 and guide shaft 7 can ensure that the valve core 4 always moves along its center line direction when working, which is beneficial to improving the sealing performance when the valve is closed.

[0061] In this example, the valve core 4 has a conical cup-shaped structure. A second liquid passage hole 401 is provided in the circumferential direction of the valve core 4. The number of second liquid passage holes 401 can be set to multiple and they are evenly distributed around the center line of the valve core 4. This arrangement allows the fluid to enter the inside of the valve core 4 cup through the second liquid passage hole 401, which is beneficial to improving the response speed of the valve core 4.

[0062] Specifically, the valve body 1 is integrally stamped and formed, and a constriction section 102 is provided at the end away from the valve port 301. The inner wall of the constriction section 102 has a flared trumpet-shaped structure, which can be used to quickly connect to external pipelines and improve the connection efficiency.

[0063] Example 2

[0064] like Figure 7-8 As shown, the difference between this embodiment and the above embodiment is only that: in this example, the valve core 4 has a conical disc structure, and the valve core 4 has a receiving cavity 402 formed at the end away from the valve port 301. The receiving cavity 402 can be a blind hole evenly distributed around the center of the valve core 4, or it can be an overall recessed annular structure. When the valve core 4 has a disc structure, the receiving cavity 402 can also allow fluid to enter the receiving cavity 402, thereby improving the response speed of the valve core 4.

[0065] Example 3

[0066] like Figure 9-10 As shown, the only difference between this embodiment and the first embodiment above is that the valve core 4 has a conical disc structure in this example.

[0067] Example 4

[0068] like Figure 11-14 As shown, the difference between this embodiment and the first embodiment described above is that, in this example, the third stepped surface 202 on the valve sleeve 2 is located near its end, causing the end of the valve sleeve 2 to abut against the valve seat 3. To further enhance the stability of the valve sleeve 2's installation structure, a collar 8 is fixedly installed at the end of the valve seat 3. The collar 8 extends outward from the valve seat 3, and its end abuts against the second stepped surface 201 of the valve sleeve 2. The collar 8 can be integrally formed with the valve seat 3, or the two can be fixedly connected by welding. This arrangement allows for a larger contact area between the valve sleeve 2 and the collar 8, improving the coaxiality of the valve sleeve 2's installation and enhancing its structural stability.

[0069] Specifically, a liquid collection groove 304 is provided in the middle of the outer wall of the valve sleeve 2. The welding liquid can flow into the connection position where the valve body 1, valve seat 3, valve sleeve 2 and collar 8 are located through the collection groove, thereby welding the valve body 1, valve seat 3, valve sleeve 2 and collar 8 simultaneously.

[0070] Specifically, the inner wall of the valve seat 3 has a recessed relief groove 303 near the valve port 301, and the end of the inner hole of the valve seat 3 has a flared trumpet-shaped structure. This is designed to facilitate the connection between the valve seat 3 and the external pipeline, so that the pipeline can be inserted into the root plane where the relief groove 303 is located, avoiding the problem of pipeline tilting and improper installation.

[0071] Example 5

[0072] like Figure 15 As shown, the difference between this embodiment and the first embodiment above is that: in this example, the first step of the valve body 1 is located near the end of the valve sleeve 2 and abuts against the end of the valve sleeve 2. That is, the first step is located near the end of the valve body 1, so that the end of the valve sleeve 2 can abut against the first step, thereby forming an axial limiting effect on the valve sleeve 2.

[0073] Example 6

[0074] like Figure 16 As shown, the difference between this embodiment and the above embodiment five is only that: in this example, the first step surface 101 is a tapered step inner wall surface with a gradually decreasing aperture. The end of the valve sleeve 2 can abut against the tapered inner wall of the first step, thereby forming a limit. It can be understood that the end of the valve sleeve 2 can also be designed as a tapered structure with the same taper as the tapered inner wall, so that the valve sleeve 2 has better centering performance after assembly.

[0075] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A non-reverse flow control device, characterized in that, include: The valve body (1) has a through channel inside, and the inner wall of the valve body (1) has a first stepped surface (101) extending towards the center. A valve sleeve (2) is disposed inside the valve body (1), and the valve sleeve (2) abuts against the first step surface (101) at the inner wall of the valve body (1) to restrict the axial movement of the valve sleeve (2). The inner wall of the valve sleeve (2) is provided with a second step surface (201) extending in the center direction. A valve seat (3) is disposed inside the valve body (1) and has a valve port (301) formed in the inner cavity. One end of the valve seat (3) abuts against the second step surface (201) of the valve sleeve (2) and is configured to axially limit the valve seat (3). The valve core (4) is axially movable and installed inside the valve body (1). When it moves to one end limit position, it can fit with the valve port (301) to isolate the internal channel of the valve body (1). When it is removed from the valve port (301), the internal channel of the valve body (1) is in a conductive state.

2. The non-reverse flow control device according to claim 1, characterized in that, A welding groove (302) is formed on the outer wall of one end of the valve seat (3). A welding component (5) is installed in the welding groove (302) and the valve seat (3), valve sleeve (2) and valve body (1) are welded and fixed.

3. The non-reverse flow control device according to claim 1, characterized in that, The outer wall of the valve sleeve (2) has a third step surface (202) extending outward, which abuts against the first step surface (101); the end of the valve sleeve (2) is provided with a first liquid passage hole (203).

4. The non-reverse flow control device according to claim 1, characterized in that, A guide sleeve (6) is fixed at the center of the valve sleeve (2), and a guide shaft (7) is fixed at the center of the valve core (4). The guide shaft (7) is slidably connected inside the guide sleeve (6).

5. A non-reverse flow control device according to claim 1, characterized in that, The valve core (4) has a conical cup-shaped structure or a conical disc-shaped structure. When the valve core (4) has a conical cup-shaped structure, a second liquid passage hole (401) is opened in the circumferential direction of the valve core (4).

6. A non-reverse flow control device according to claim 5, characterized in that, The valve core (4) has a receiving cavity (402) formed at the end away from the valve port (301).

7. The non-reverse flow control device according to claim 1, characterized in that, A collar (8) is fixedly installed at the end of the valve seat (3). The collar (8) extends outward from the valve seat (3), and the end of the collar (8) abuts against the second step surface (201) of the valve sleeve (2).

8. A non-reverse flow control device according to claim 7, characterized in that, The valve sleeve (2) has a liquid collection tank (304) in the middle of its outer wall. The welding liquid can flow into the connection position of the valve body (1), valve seat (3), valve sleeve (2) and collar (8) through the collection tank, thereby welding the valve body (1), valve seat (3), valve sleeve (2) and collar (8) simultaneously.

9. A non-reverse flow control device according to claim 1, characterized in that, The valve body (1) is integrally stamped and formed, and a constriction section (102) is provided at one end away from the valve port (301). The inner wall of the constriction section (102) has a flared trumpet-shaped structure.

10. A non-reverse flow control device according to claim 1, characterized in that, The inner wall of the valve seat (3) has a recessed relief groove (303) near the valve port (301), and the end of the inner hole of the valve seat (3) has a flared trumpet-shaped structure.

11. A non-reverse fluid control device according to claim 1, characterized in that, The first step surface (101) of the valve body (1) is located near the end of the valve sleeve (2) and abuts against the end of the valve sleeve (2).

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