Pressure control valve

Abstract

The invention discloses a pressure control valve which is characterized in that a valve body component comprises a first valve body and a second valve body, the first valve body and the second valve body are of tubular structures made of stainless steel materials, the first valve body and the second valve body are directly or indirectly connected in a sleeved mode and fixed in a welded mode, the first valve body comprises a radial pipe wall part, and the radial pipe wall part is provided with a radial pipe wall. The radial pipe wall portion comprises a flow path outlet end, the second valve body comprises an axial pipe opening portion, and the axial pipe opening portion comprises a flow path inlet end. The use of brass materials in the product can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of fluid control technology, and in particular to a pressure control valve. Background Art

[0002] Pressure control valves are widely used in flow systems. Figure 8 The invention discloses a right-angle one-way valve structure used as a pressure control valve, which is generally used in air-conditioning systems or freezing / refrigeration equipment to control the unidirectional flow of fluid and prevent backflow. The control valve includes a valve body 1, an end cover 3 that seals the inner cavity 2 of the valve body, a piston component 4 disposed in the inner cavity 2 of the valve body, a spring 5 elastically arranged between the end cover 3 and the piston component 4, an inlet pipe 6 welded to the lower end of the valve body 1, and an outlet pipe 7 welded to the side of the valve body 1. When the pressure P1 in the inlet pipe 6 is greater than the pressure P2 of the outlet pipe 7 by a certain value, the inflowing pressure difference will overcome the spring force of the spring 5 and the gravity of the piston component 4, causing the piston component 4 to move upward to achieve the purpose of opening the valve; similarly, when the pressure P1 in the inlet pipe 6 decreases, the product closes the valve under the action of the spring force of the spring 5 and the gravity of the piston component 4.

[0003] The valve body 1 in the background technology is made of leaded brass material through forging / casting blank and then machined. In recent years, with the improvement of environmental awareness, the design requirements of control valve products emphasize reducing the amount of leaded brass and reducing high-energy consumption materials. Therefore, the above products have room for improvement. Summary of the invention

[0004] The present invention provides a pressure control valve, comprising a valve body component, a valve core component and a spring component, the valve core component comprising a valve core, the valve core being located in the valve cavity of the pressure control valve, one end of the spring component abutting against the valve body component, and the other end of the spring component abutting against the valve core; the valve body component comprising a first valve body and a second valve body, the first valve body and the second valve body being tubular structures made of stainless steel, the first valve body and the second valve body being directly or indirectly sleeved, and the first valve body and the second valve body being welded and fixed; the first valve body comprising a radial tube wall portion, the radial tube wall portion comprising a flow path outlet end, the second valve body comprising an axial tube mouth portion, the axial tube mouth portion comprising a flow path inlet end.

[0005] The pressure control valve provided by the present invention has a valve body component that adopts a split structure, and uses a first valve body and a second valve body of a tubular structure made of stainless steel to be sleeved and fixedly connected. Compared with the background technology, it can reduce the use of brass materials and also reduce energy consumption during the processing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 : A schematic structural diagram of a pressure control valve in a closed valve state provided by the present invention;

[0007] Figure 2 : Figure 1 Structural schematic diagram of the pressure control valve in the valve-open state in

[0008] Figure 3 : Figure 1 Structural schematic diagram of the spool component in

[0009] Figure 4 : Figure 1 Structural schematic diagram of the socket installation of the valve body component and the spool seat in

[0010] Figure 5 : Figure 1 Structural schematic diagram of the valve body component and the outlet pipe assembly in

[0011] Figure 6 : Another structural schematic diagram of the valve body component given by the present invention;

[0012] Figure 7 : The third structural schematic diagram of the valve body component given by the present invention;

[0013] Figure 8 : Structural schematic diagram of a pressure control valve in the background art.

[0014] Figures 1 - 7 Symbol description in

[0015] 10 - Pressure control valve / check valve;

[0016] 100 / 100A / 100B - Valve body component;

[0017] 110 / 110A - First valve body;

[0018] 111 - Flow path outlet end;

[0019] 112 - Inner wall surface;

[0020] 120 / 120A - Second valve body;

[0021] 121 - Flow path inlet end;

[0022] 200 - Spool component;

[0023] 210 - Spool;

[0024] 220 - Seal;

[0025] 300 / 300A - Spool seat;

[0026] 310 - Valve port part;

[0027] 320 - Connection part;

[0028] 400 - Outlet connection pipe;

[0029] 510 - First connecting sleeve, 520 - Second connecting sleeve;

[0030] 600 / 600A - Sealing cover body;

[0031] 610 - Guide limiting part / small - diameter section;

[0032] 620 - Outer - edge mating part / large - diameter section;

[0033] 630 - Axial limiting part / stage section;

[0034] 700 - Spring part;

[0035] 800 - Valve cavity;

[0036] 900 - Valve port. Detailed implementation manners

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. The upper, lower and other orientation terms involved herein are defined according to the positions of the components shown in the drawings, only for the sake of clarity and convenience of expressing the technical solutions. It should be understood that the orientation terms used herein should not limit the scope of the claims of the present application; similarly, it should be understood that the structural relationships such as connection, fixation, and abutment described herein, unless otherwise specified to reflect the inventive concept, should include direct and indirect methods.

[0038] Figure 1 This is a structural schematic diagram of a pressure control valve in the valve - closed state given by the present invention, Figure 2 and Figure 1 is a structural schematic diagram of the pressure control valve in the valve - open state in

[0039] As Figure 1 and Figure 2 shown. In this specific embodiment, the pressure control valve 10 is specifically a right - angle check valve in a flow - path system, mainly including a valve - body component 100, a valve - core component 200, and a valve - core seat 300.

[0040] The valve body component 100 has a split structure and includes a first valve body 110, a second valve body 120, and a valve core seat 300. The first valve body 110, the second valve body 120, and the valve core seat 300 are tubular structures made of stainless steel metal material. The upper section of the valve core seat 300 forms a valve port portion 310 by inwardly constricting the opening, and the lower section of the valve core seat 300 includes a connecting portion 320.

[0041] The upper section of the second valve body 120 extends into the inner cavity of the first valve body 110, so that the inner side wall of the connecting portion 320 is sleeved on the outer side wall of the upper end of the second valve body 120, and the inner side wall of the lower end of the first valve body 110 is sleeved on the outer side wall of the connecting portion 320, so that the second valve body 120 and the first valve body 110 are indirectly sleeved through the valve core seat 300. The above structural relationship facilitates welding at the connection area Q of the first valve body 110, the second valve body 120, and the connecting portion 320, so that the first valve body 110, the second valve body 120, and the connecting portion 320 are fixedly connected at one time.

[0042] The first valve body 110 includes a radial pipe wall portion, and the radial pipe wall portion includes an outwardly protruding flanged portion 111 formed by stretching, and the flanged portion 111 serves as the flow path outlet end portion 111; the lower section of the second valve body 120 includes an axial pipe orifice portion, and the axial pipe orifice portion includes a flow path inlet end portion 121.

[0043] The inner cavity of the first valve body 110 serves as the valve cavity 800 of the pressure control valve 10. The valve core component 200 includes a valve core 210, and the valve core 210 is located in the valve cavity 800. A spring member 700 is also provided in the valve cavity 800.

[0044] The valve body component 100 further includes a sealing cover body 600 made of stainless steel material. The sealing cover body 600 is fixedly welded to the first valve body 110. The sealing cover body 600 is located at one end of the first valve body 110, the second valve body 120 is located at the other end of the first valve body 110, one end of the spring member 700 abuts against the sealing cover body 600, and the other end of the spring member 700 abuts against the valve core 210.

[0045] In the stable state of the flow path system, the difference △P (P1 - P2) between the fluid pressure P1 at the flow path inlet end 121 and the fluid pressure P2 at the flow path outlet end portion 111 is less than the sum of the abutting force P3 of the spring member 700 (i.e., the compression spring) and the gravity of the valve core component 200. At this time, the valve core 210 abuts against the valve port portion 310, and the valve port 900 of the valve port portion 310 is closed, and the fluid between the flow path inlet end 121 and the flow path outlet end portion 111 is not connected, and the pressure control valve 10 is in the closed state (see Figure 1); When the fluid pressure in the flow path system changes, the fluid pressure P1 at the flow path inlet end 121 increases, and ΔP is greater than the sum of the abutment force P3 of the spring member 700 and the gravity of the valve core component 200, under the action of the pressure difference, the valve core 210 moves upward and separates from the valve port portion 310, so that the valve port 900 of the valve port portion 310 is opened, and the flow path inlet end 121 is fluidly connected with the flow path outlet end 111, and the pressure control valve 10 is in the valve open state (see Figure 2 ).

[0046] The technical solution provided by the present invention is that the valve body component 100 adopts a split structure, and the first valve body 110 and the second valve body 120 adopt a stainless steel tubular structure. Moreover, the sealing cover 600 is also made of stainless steel. Compared with the background technology, the amount of leaded brass in the product is reduced, and the processing process mostly uses pipe / plate stamping and molding, which reduces the use of high-energy-consuming materials.

[0047] Figure 4 for Figure 1 Schematic diagram of the structure of the valve body component and the valve core seat sleeve installation.

[0048] like Figure 4 Shown and see Figure 1 As a further extension of the above technical solution, since the first valve body 110, the second valve body 120 and the valve core seat 300 can be formed by stretching stainless steel thin-walled materials, after the first valve body 110 and the valve core seat 300 are sleeved, and the valve core seat 300 and the second valve body 120 are sleeved (that is, the first valve body 110 and the second valve body 120 are indirectly sleeved), a laser welding head can be used in the external K area to weld and fix them in one time by rotating using a laser welding process, which has strong workability and avoids the heat effect of multiple welding.

[0049] Figure 3 for Figure 1 Schematic diagram of the structure of the valve core components.

[0050] like Figure 3 Shown and referenced Figure 1 In order to further reduce the amount of leaded brass in the product, the valve core 210 is made of aluminum, aluminum alloy, stainless steel or polymer material. The valve core component 200 also includes a sealing member 220, which is embedded in the valve core 210 to limit the position.

[0051] As a further extension of the above technical solution, the sealing cover body 600 is made of stainless steel thin-walled material, and is formed by stamping or stretching to form a large diameter section on the upper section, a small diameter section on the lower section, and a stage connecting the large diameter section and the small diameter section.

[0052] The small diameter section serves as the guide limiting section 610 and is adapted to the inner diameter of the port portion of the spring member 700, that is, the radial direction of the spring member 700 is limited, the radial shaking of the spring member 700 is reduced, and the action stability of the valve opening process is improved. The large diameter section serves as the outer edge matching section 620, and the matching surface of the outer edge matching section 620 is matched with the inner wall surface 112 of the upper section of the first valve body 110, which plays a guiding role in installation. Moreover, after installation, the sealing cover body 600 can be fixedly connected to the first valve body 110 by laser welding at the axial connection position (Q1), thereby improving the sealing reliability and having less impact on the components in the valve cavity.

[0053] The stage serves as an axial limit portion 630 , and during the valve opening process, the axial limit portion 630 can limit the displacement of the valve core 210 along the axial direction.

[0054] Figure 5 for Figure 1 Schematic diagram of the structure of the valve body component and outlet pipe combination.

[0055] like Figure 5 As shown, and refer to Figure 1 . As a further extension of the above technical solution, it also includes an outlet pipe 400, a first connecting sleeve 510, and a second connecting sleeve 520. The outlet pipe 400 is a tubular structure made of stainless steel material, and the first connecting sleeve 510 and the second connecting sleeve 520 are tubular structures made of copper material. The outlet pipe 400 is sleeved and welded to the outer flange of the first valve body 110. The first connecting sleeve 510 is sleeved and welded to the outlet pipe 400; the second connecting sleeve 520 is sleeved and welded to the second valve body 120. In this way, it is convenient to weld and connect the pressure control valve to the copper pipe fittings in the flow path system.

[0056] Figure 6 This is a schematic structural diagram of another valve body component provided by the present invention.

[0057] like Figure 6 Shown and referenced Figure 1 The difference from the above technical solution is that in the valve body component 100A of this technical solution, the valve core seat 300A and the second valve body 120A are integrally formed by a tube body, which simplifies the manufacturing process. Of course, as a further extension of the technical solution, the valve core seat 300A can also be integrally formed by a tube body with the first valve body, which can also achieve the same technical effect, and will not be repeated here.

[0058] Figure 7 This is a schematic structural diagram of a third valve body component provided by the present invention.

[0059] like Figure 7 Shown and referenced Figure 1。The difference from the foregoing technical solution lies in that in the valve body component 100B of this technical solution, the sealing cover body 600A and the first valve body 110A are integrally formed, made of stainless steel thin-wall material, and formed by stamping or stretching, which simplifies the manufacturing process. This technical solution can also achieve the same technical effect and will not be elaborated here.

[0060] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A pressure control valve, comprising a valve body component (100), a valve core component (200) and a spring component (700). The valve core component (200) includes a valve core (210). The valve core (210) is located in a valve cavity (800) of the pressure control valve. One end of the spring component (700) abuts against the valve body component (100), and the other end of the spring component (700) abuts against the valve core (210). It is characterized in that: The valve body component (100) includes a first valve body (110) and a second valve body (120). The first valve body (110) and the second valve body (120) are tubular structures made of stainless steel material. The first valve body (110) and the second valve body (120) are directly or indirectly sleeved, and the first valve body (110) and the second valve body (120) are fixed by welding. The first valve body (110) includes a radial pipe wall portion, and the radial pipe wall portion includes a flow path outlet end portion (111). The second valve body (120) includes an axial pipe orifice portion, and the axial pipe orifice portion includes a flow path inlet end portion (121).

2. The pressure control valve according to claim 1, wherein The valve body component (100) further includes a valve core seat (300). The valve core seat (300) is a tubular structure made of stainless steel material. The valve core seat (300) includes a valve port portion (310). The valve core (210) can abut against the valve port portion (310). The first valve body (110) and the valve core seat (300) are sleeved and fixed by welding. The valve core seat (300) and the second valve body (120) are sleeved and fixed by welding.

3. The pressure control valve according to claim 2, characterized in that, The first valve body (110), the second valve body (120) and the valve core seat (300) are fixedly connected at one time by a laser welding process.

4. The pressure control valve according to claim 1, wherein, The valve body component (100) further includes a valve core seat (300A). The valve core seat (300A) is integrally formed with the first valve body (110), or the valve core seat (300A) is integrally formed with the second valve body (120). The valve core seat (300A) includes a valve port portion (310). The valve core (210) can abut against the valve port portion (310A).

5. The pressure control valve according to any one of claims 1-5, characterized in that, It further includes an outlet connecting pipe (400). The outlet connecting pipe (400) is a tubular structure made of stainless steel material. The radial pipe wall portion includes a flanged edge portion, and the flanged edge portion serves as the flow path outlet end portion (111). The outlet connecting pipe (400) is sleeved and fixed by welding with the flanged edge portion.

6. The pressure control valve according to claim 5, wherein, It further includes a first connecting sleeve (510) and a second connecting sleeve (520). The first connecting sleeve (510) and the second connecting sleeve (520) are tubular structures made of copper material. The first connecting sleeve (510) is sleeved and fixed by welding with the outlet connecting pipe (400). The second connecting sleeve (520) is sleeved and fixed by welding with the second valve body (120).

7. The pressure control valve according to any one of claims 1-6, characterized in that, The valve body component (100) further includes a sealing cover body (600), the sealing cover body (600) is made of stainless steel material, and the sealing cover body (600) is fixedly welded to the first valve body (110), or the sealing cover body (600) and the first valve body (110) are integrally formed by stretching; The sealing cover body (600) is located at one end of the first valve body (110), the second valve body (120) is located at the other end of the first valve body (110), and the spring member (700) abuts against the sealing cover body (600).

8. The pressure control valve according to claim 7, wherein The lower section of the sealing cover body (600) includes a guiding and restricting portion (610), and the guiding and restricting portion (610) is adapted to the inner diameter of the port portion of the spring member (700).

9. The pressure control valve according to claim 7, wherein, The upper section of the sealing cover body (700) includes an outer edge mating portion (620), the mating surface (621) of the outer edge mating portion (620) is adapted to the inner wall surface (112) of the first valve body (110), and the sealing cover body (700) and the first valve body (110) are fixedly connected by laser welding.

Images