Control valve body casting

Abstract

The present invention relates to the technical field of castings, and in particular provides a regulating valve body casting, including a body. An inlet is integrally formed at the left end of the body, an outlet is integrally formed at the right end, and a mounting port is integrally formed at the top. A pressure regulating valve is installed in the mounting port. A valve cavity is integrally formed between the inlet and the outlet, and the inner end of the pressure regulating valve is located in the valve cavity. A first flow cavity is formed between the bottom of the valve cavity and the inlet, and a second flow cavity is formed between the top of the valve cavity and the outlet. To achieve the pressure relief function, the structure of the present invention is simple. In order to automatically open the control plate, its power source is ingeniously combined with a manual pressure regulating valve. In addition to being able to manually adjust the body pressure and flow rate, when no manual operation is required, when the spring assembly in its stepped hole automatically senses an increase in fluid pressure, it drives the control plate to automatically complete the opening action.

Description

Technical Field

[0001] The present invention relates to the technical field of castings, and particularly to a casting for a regulating valve body. Background Art

[0002] In the automatic control of modern factories, regulating valves play a very important role. Common regulating valves are mostly pressure regulating valves, which are composed of a valve body casting and a valve stem installed on the valve body casting. By adjusting the valve stem, the fluid pressure or flow rate flowing through the valve body can be adjusted. Traditional valve body castings mostly consider the flow rate and overall strength in terms of structure.

[0003] However, when the fluid flow rate is high or the fluid pressure is large, in order to prevent the valve body casting from bursting, the valve stem on the valve body can only be adjusted manually to automatically relieve the pressure of the valve body. This pressure relief method not only has low efficiency but is also difficult to achieve without manual operation. Even if a pressure relief structure is provided on some types of valve bodies, the pressure relief structure needs to be separately arranged on the side of the valve body, resulting in high costs. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a casting for a regulating valve body, including a body. An inlet is integrally formed at the left end of the body, an outlet is integrally formed at the right end, and a mounting port is integrally formed at the top. A pressure regulating valve is installed in the mounting port. A valve cavity is integrally formed between the inlet and the outlet, and the inner end of the pressure regulating valve is located in the valve cavity. A first flow cavity is formed between the bottom of the valve cavity and the inlet, and a second flow cavity is formed between the top of the valve cavity and the outlet. A first port is formed in the first flow cavity, and a second port is formed in the second flow cavity. A control plate is installed on the first port. The control plate is an arc-shaped plate. When the control plate is closed, its arc-shaped surface coincides with the arc-shaped cavity surface of the first flow cavity. A branch pipe is connected between the first port and the second port.

[0005] The pressure regulating valve is a self-made valve, which is threadedly connected to the mounting port. A stepped hole is formed upward from the bottom end of the pressure regulating valve. A spring assembly is arranged in the stepped hole. The spring assembly includes a lifting rod inserted upward from the bottom into the stepped hole, a lifting plate fixed on the lifting rod, and a spring sleeved on the lifting rod and elastically abutted between the lifting plate and the top end of the stepped hole at both ends. A reduced-diameter hole is provided between the first flow cavity and the valve cavity. The bottom end of the lifting rod enters the first flow cavity through the reduced-diameter hole, and a hanging hole is formed at the bottom end of the lifting rod. A steel wire is connected to the hanging hole and extends upward to be connected to the control plate. An expansion port is formed at the bottom end of the pressure regulating valve, and the opening of the expansion port faces downward.

[0006] As further preferred, the second flow chamber is inclined downward and is located above the first flow chamber, and the opening direction of the second port is consistent with the inclined direction of the second flow chamber.

[0007] As further preferred, an expansion cavity is formed on a side of the first flow cavity away from the inlet, and an arc is formed at the connection between the bottom of the expansion cavity and the first flow cavity.

[0008] As further preferred, the expansion opening is trumpet-shaped, and its large end faces the first flow cavity.

[0009] As a further preferred embodiment, a guide column is formed in the first flow cavity at one time, and the guide column is located between the control plate and the bottom end of the lifting rod. The side of the control plate away from the inlet is connected to the first port through a hinge shaft. There are two guide columns, and both are located in the peripheral direction of the control plate. One guide column is close to the bottom end of the lifting rod, and the other guide column is located on the same side of the control plate. The steel wire passes through the two guide columns in turn and is connected to the inner surface of the control plate.

[0010] As further preferred, a detour portion is provided in the second flow cavity, the detour portion protrudes inward from the top of the cavity wall of the second flow cavity, and the second port is located between the detour portion and the outlet.

[0011] As a further preferred embodiment, a return spring is connected to the lumen of the branch pipe, the return spring is close to the control plate, and the other end of the return spring is connected to the inner wall surface of the control plate, and a rubber is provided on the outer circular surface of the control plate. When the control plate is rotated into the first port to close the first port, the rubber on its outer circular surface is sealed on the lumen wall of the branch pipe, and a limiting plate is fixed in the branch pipe, one end of the return spring located in the branch pipe is connected to the limiting plate, and the middle part of the limiting plate is communicated with the lumen of the branch pipe.

[0012] As a further preferred embodiment, a positioning plate is fixed in the expansion mouth, a drainage hole is provided on the positioning plate, the upper end of the drainage hole is communicated with the valve cavity, and the lower end of the drainage hole is communicated with the first flow cavity, a positioning hole is provided in the middle of the positioning plate, and the lifting rod passes downward through the positioning hole into the first flow cavity, the positioning hole is a polygon, the cross-sectional shape of the lifting rod is a polygon, the polygonal shape of the lifting rod matches the polygonal shape of the positioning hole, and a limit block located above the positioning plate is fixed on the lifting rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] A control board is arranged inside the valve body, and a branch pipe connecting the inlet and outlet ends is arranged outside. When the control board is in the closed state, it covers the first port, which is the liquid inlet end of the branch pipe. Therefore, when the control board deflects inward, it is equivalent to opening the first port, and the return spring is stretched as it deflects inward with the control board. Part of the fluid in the valve cavity is released through the first port into the branch pipe, and then released from the other end of the branch pipe into the second flow cavity. After converging with the fluid being discharged in the second flow cavity, they are discharged together towards the outlet end, thereby rapidly reducing the fluid pressure inside the valve body and ensuring that the strength of the valve body is not affected by the material of the casting. In addition to the above effects, the branch pressure relief assembly composed of the control board and the branch pipe replaces the existing pressure relief valve. To enable the valve body to achieve automatic pressure relief, there is no need to separately set a pressure relief valve at other parts of the valve body. For realizing the pressure relief function, the structure of the present invention is simple. And in order to make the control board open automatically, its power source is ingeniously combined with a manual pressure regulating valve. In addition to being able to manually adjust the pressure and flow rate of the valve body, when no manual operation is required, when the spring assembly in its stepped hole automatically senses the increase in fluid pressure, it drives the control board to automatically complete the opening action. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic internal structure diagram after the regulating valve body casting provided by the embodiment of the present invention is cut open;

[0016] Figure 2 For the regulating valve body casting provided by the embodiment of the present invention, it is Figure 1 An enlarged schematic view of part A drawn out;

[0017] Figure 3 It is a schematic back plane diagram of the regulating valve body casting provided by the embodiment of the present invention;

[0018] Figure 4 It is a schematic top plane diagram of only the positioning plate in the regulating valve body casting provided by the embodiment of the present invention;

[0019] Figure 5 It is a schematic view of the internal structure and the hinged structure with the control board when the branch pipe in the regulating valve body casting provided by the embodiment of the present invention is partially cut open.

[0020] In the figure: 1. Body; 2. Inlet; 3. Outlet; 4. Installation port; 5. Pressure regulating valve; 6. Valve cavity; 7. First flow cavity; 8. Second flow cavity; 9. First port; 10. Second port; 11. Control board; 12. Branch pipe; 13. Step hole; 14. Spring assembly; 15. Lifting rod; 16. Lifting plate; 17. Spring; 18. Reducing hole; 19. Hanging hole; 20. Steel wire; 21. Expansion port; 22. Expansion cavity; 23. Arc; 24. Guide post; 25. Meandering part; 26. Return spring; 27. Rubber sheet; 28. Positioning plate; 29. Drainage hole; 30. Positioning hole; 31. Restricting plate; 32. Limiting block. Specific embodiments

[0021] The following will clearly and completely describe the above and other embodiments and advantages of the present invention with reference to the accompanying drawings. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments.

[0022] In one embodiment, as Figures 1 - 5 shown:

[0023] This embodiment provides a casting of a regulating valve body, including a body 1. An inlet 2 is integrally formed at the left end of the body 1, an outlet 3 is integrally formed at the right end, an installation port 4 is integrally formed at the top. A pressure regulating valve 5 is installed in the installation port 4. A valve cavity 6 is integrally formed between the inlet 2 and the outlet 3. The inner end of the pressure regulating valve 5 is located in the valve cavity 6. A first flow cavity 7 is formed between the bottom of the valve cavity 6 and the inlet 2. A second flow cavity 8 is formed between the top of the valve cavity 6 and the outlet 3. A first port 9 is formed in the first flow cavity 7. An expansion cavity 22 is formed on the side of the first flow cavity 7 away from the inlet 2. An arc 23 is formed at the connection between the bottom of the expansion cavity 22 and the first flow cavity 7. A second port 10 is formed in the second flow cavity 8. A control board 11 is installed on the first port 9. The control board 11 is an arc-shaped plate. When the control board 11 is closed, its arc-shaped surface coincides with the arc-shaped cavity surface of the first flow cavity 7. A branch pipe 12 is connected between the first port 9 and the second port 10;

[0024] The pressure regulating valve 5 is a self-made valve. The pressure regulating valve 5 is connected to the installation port 4 by threads. A step hole 13 is opened upward from the bottom end of the pressure regulating valve 5. A spring assembly 14 is provided in the step hole 13. The spring assembly 14 includes a lifting rod 15 inserted into the step hole 13 from the bottom upward, a lifting plate 16 fixed on the lifting rod 15, and a spring 17 sleeved on the lifting rod 15 and elastically abutted between the lifting plate 16 and the top end of the step hole 13 at both ends. A reducing hole 18 is provided between the first flow cavity 7 and the valve cavity 6. The bottom end of the lifting rod 15 enters the first flow cavity 7 through the reducing hole 18, and a hanging hole 19 is opened at the bottom end of the lifting rod 15. A steel wire 20 is connected to the hanging hole 19. The steel wire 20 extends upward and is connected to the control board 11. An expansion port 21 is opened at the bottom end of the pressure regulating valve 5, and the opening of the expansion port 21 faces downward.

[0025] In use, the water inlet pipe is connected to the inlet 2, and the water outlet pipe is connected to the outlet 3. The fluid flows from the inlet 2 into the first flow chamber 7 of the valve chamber 6, then flows upward through the variable-diameter hole 18 into the second flow chamber 8, and finally is discharged outward through the outlet 3 at the end of the second flow chamber 8. Rotate the pressure regulating valve 5 to lower the bottom end of the pressure regulating valve 5 so that the bottom end of the pressure regulating valve 5 approaches the variable-diameter hole 18, thereby reducing the discharge amount of the variable-diameter hole 18 and reducing the fluid discharged from the variable-diameter hole 18 into the second flow chamber 8, thus completing the regulation. In addition, affected by the pipeline and fluid velocity, etc., when the fluid pressure entering the first flow chamber 7 is relatively high, these fluids will release the discharge amount upward in a short time. When the liquid pressure of the discharge amount is greater than the supporting force of the bottom end of the spring 17 on the lifting plate 16, the lifting plate 16 will rise, and at the same time it will drive the lifting rod 15 to rise. The lifting rod 15 drives the hanging hole 19 to rise, and the wire 20 is dragged upward by the hanging hole 19. The wire 20 drags the control plate 11 inward, causing the control plate 11 to deflect inward. Since the control plate 11 covers the first port 9 when it is closed, and the first port 9 is the liquid inlet end of the branch pipe 12, when the control plate 11 deflects inward, it is equivalent to opening the first port 9. The return spring 26 is stretched along with the inward deflection of the control plate 11. Part of the fluid in the valve chamber 6 is released into the branch pipe 12 through the first port 9, and then is released from the other end of the branch pipe 12 into the second flow chamber 8. After converging with the fluid being discharged in the second flow chamber 8, it is discharged together towards the outlet 3 end, thereby quickly reducing the fluid pressure in the valve body 1 and ensuring that the valve body 1 will not be affected by the casting material (such as ductile iron, etc.) in terms of strength. In addition to the above effects, the branch pressure relief assembly composed of the control plate 11 and the branch pipe 12 replaces the existing pressure relief valve. In order to enable the valve body 1 to achieve automatic pressure relief, there is no need to separately set a pressure relief valve at other parts of the valve body 1 (such as beside the pressure regulating valve 5). For realizing the pressure relief function, the structure of the present invention is simple; and in order to automatically open the control plate 11, its power source is ingeniously combined with the manual pressure regulating valve 5. The pressure regulating valve 5 can not only manually adjust the pressure and flow rate of the valve body 1, but also when no manual operation is required, when the spring assembly 14 in its stepped hole 13 automatically senses the rising fluid pressure, it drives the control plate 11 to automatically complete the opening action.

[0026] After the pressure is relieved, the spring 17 rebounds downward and pushes the lifting rod 15 to descend through the lifting plate 16. The wire 20 becomes slack, and the return spring 26 releases its length forward to pull the control plate 11 back to the closed position.

[0027] The control board 11 is connected to the lifting rod 15 through a steel wire 20. After the pressure regulating valve 5 is assembled onto the valve body 1, the additional spring assembly 14, an additional accessory, can also be assembled into the valve cavity 6, improving the assembly efficiency. To make the assembly of each accessory more convenient, the casting mold is divided into two halves, the solution is poured into the two molds respectively, and after molding, the front and rear parts of the valve body 1 are obtained. Then, after assembling each accessory, the front and rear parts of the valve body 1 are welded together.

[0028] An expansion port 21 is provided at the bottom end of the pressure regulating valve 5. The expansion port 21 is in a flared shape, and its large end faces the first flow chamber 7. The expansion port 21 can better receive the fluid. When the fluid is discharged upward through the reduced-diameter hole 18, it can be more easily collected by the expansion port 21. In addition, the pressure provided when the fluid is discharged upward is quickly concentrated on the lifting plate 16 after being collected by the expansion port 21. The pressure reflected in a short time is concentrated on the lifting plate 16 in a short time. If the pressure is relatively large, it can push the lifting plate 16 to rise in a short time. The lifting plate 16 pushes the lifting rod 15 to rise in a short time, and the control board 11 is opened through the steel wire 20 in a short time, improving the pressure relief speed of the fluid in the valve body 1.

[0029] As Figure 1 shown, the second flow chamber 8 is inclined downward and is located above the first flow chamber 7. The opening direction of the second port 10 is the same as the inclination direction of the second flow chamber 8. The fluid discharged to the second flow chamber 8 through the branch pipe 12, in addition to converging with the fluid in the second flow chamber 8 and being discharged together, will also avoid fluid backflow due to the inclination of the second flow chamber 8 towards the outlet 3 side. Similarly, as Figure 1 shown, a detour portion 25 is provided in the second flow chamber 8. The detour portion 25 protrudes inward from the top of the chamber wall of the second flow chamber 8. The second port 10 is located between the detour portion 25 and the outlet 3. When the pressure-relieved fluid enters the second flow chamber 8 from the second port 10, in addition to being directly discharged by using the inclination of the second flow chamber 8 towards the outlet 3, the detour portion 25 is also used to further reduce fluid backflow.

[0030] As Figure 1As shown, a guide column 24 is formed in the first flow chamber 7 at one time. The guide column 24 is located between the control plate 11 and the bottom end of the lifting rod 15. The side of the control plate 11 away from the inlet 2 is connected to the first port 9 through a hinge shaft. There are two guide columns 24, both of which are located in the peripheral direction of the control plate 11. One guide column 24 is close to the bottom end of the lifting rod 15, and the other guide column 24 is located on the same side of the control plate 11. The steel wire 18 passes through the two guide columns 24 in sequence and is connected to the inner surface of the control plate 11. When the lifting rod 15 drags the control plate 11 through the steel wire 18, the direction of the steel wire 18 is limited by the guide column 24, ensuring that the open side of the control plate 11 faces the inlet 2 when it rotates, ensuring that part of the fluid flows directly into the branch pipe 12 from the water inlet side, and when the fluid pressure in the first flow chamber 7 is not eliminated, the subsequent fluid directly enters the branch pipe 12, thereby improving the pressure relief efficiency.

[0031] like Figure 5 As shown, a return spring 26 is connected to the lumen of the branch pipe 12, the return spring 26 is close to the control plate 11, and the other end of the return spring 26 is connected to the inner wall surface of the control plate 11. A rubber 27 is provided on the outer circumferential surface of the control plate 11. When the control plate 11 rotates to the first port 9 to close the first port 9, the rubber 27 on the outer circumferential surface is sealed on the lumen wall of the branch pipe 12. A limiting plate 31 is fixed in the branch pipe 12. One end of the return spring 26 located in the branch pipe 12 is connected to the limiting plate 31, and the middle part of the limiting plate 31 is connected to the lumen of the branch pipe 12. When the control plate 11 is opened under the drag of the steel wire 18, the return spring 26 is stretched and lengthened along the opening direction of the control plate 11. On the contrary, when the steel wire 18 is relaxed, the return spring 26 shrinks and shortens and pulls the control plate 11 back, and the first port 9 is automatically closed by the close relationship between the rubber 27 and the inner wall of the first port 9.

[0032] like Figures 1 to 4 As shown, a positioning plate 28 is fixed in the expansion opening 27, and a drainage hole 29 is provided on the positioning plate 28. The upper end of the drainage hole 29 is communicated with the valve chamber 6, and the lower end of the drainage hole 29 is communicated with the first flow chamber 7. A positioning hole 30 is provided in the middle of the positioning plate 28, and the lifting rod 15 passes downward through the positioning hole 30 to enter the first flow chamber 7. The positioning hole 30 is a polygon, and the cross-sectional shape of the lifting rod 15 is a polygon. The polygonal shape of the lifting rod 15 matches the polygonal shape of the positioning hole 30. When the pressure regulating valve 5 is manually adjusted in height, the lifting rod 15 will not rise and fall with it, and the lifting rod 15 will not rotate under the restriction of the positioning hole 30, and the steel wire 18 will not be knotted, and the structure is reasonable. The drainage hole 29 is provided on the positioning plate 28, which will not affect the normal discharge of fluid from the first flow chamber 7 to the second flow chamber 8, and the positioning plate 28 also has a filtering effect by using the drainage hole 29.

[0033] The above orientation references do not represent the specific orientations of the components in this implementation. This implementation is only for the convenience of describing the solution and is set with relative descriptions with reference to the orientations in the figures. In essence, the specific orientations of the components are based on their actual installation, actual use, and the habitual orientation descriptions of those skilled in the art. This is hereby stated.

[0034] The specific implementation manners described above further elaborate on the invention purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are only the specific implementation manners of the present invention and are not used to limit the protection scope of the present invention. In particular, for those skilled in the art, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The valve body casting of the regulating valve is characterized by: The invention comprises a body (1), wherein the left end of the body (1) is formed with an inlet (2), the right end is formed with an outlet (3), the top end is formed with an installation port (4), a pressure regulating valve (5) is installed in the installation port (4), a valve cavity (6) is formed between the inlet (2) and the outlet (3), the inner end of the pressure regulating valve (5) is located in the valve cavity (6), a first flow cavity (7) is formed between the bottom of the valve cavity (6) and the inlet (2), a second flow cavity (8) is formed between the top of the valve cavity (6) and the outlet (3), a first port (9) is formed in the first flow cavity (7), a second port (10) is formed in the second flow cavity (8), a control plate (11) is installed on the first port (9), the control plate (11) is an arc-shaped plate, and when the control plate (11) is closed, its arc-shaped surface coincides with the arc-shaped cavity surface of the first flow cavity (7), and a branch pipe (12) is connected between the first port (9) and the second port (10); The pressure regulating valve (5) is a self-made valve. The pressure regulating valve (5) is connected to the mounting port (4) by means of threads. A stepped hole (13) is provided upward from the bottom end of the pressure regulating valve (5). A spring assembly (14) is provided in the stepped hole (13). The spring assembly (14) comprises a lifting rod (15) inserted into the stepped hole (13) from the bottom upward, a lifting plate (16) fixed on the lifting rod (15), and a lifting plate (16) sleeved on the lifting rod (15) and elastically abutting at both ends between the lifting plate (16) and the stepped hole (13). ), a spring (17) is arranged between the top of the first flow chamber (7) and the valve chamber (6), a reducing hole (18) is arranged between the first flow chamber (7) and the valve chamber (6), the bottom end of the lifting rod (15) enters the first flow chamber (7) through the reducing hole (18), and a hanging hole (19) is arranged at the bottom end of the lifting rod (15), a steel wire (20) is connected to the hanging hole (19), and the steel wire (20) is connected to the control plate (11) after extending upward, and an expansion opening (21) is arranged at the bottom end of the pressure regulating valve (5), and the opening of the expansion opening (21) faces downward; The second flow chamber (8) is inclined downward and is located above the first flow chamber (7), and the opening direction of the second port (10) is consistent with the inclined direction of the second flow chamber (8); An expansion cavity (22) is formed on a side of the first flow cavity (7) away from the inlet (2), and a circular arc (23) is formed at the connection between the bottom of the expansion cavity (22) and the first flow cavity (7).

2. The regulating valve body casting according to claim 1, characterized in that: The expansion opening (21) is trumpet-shaped, and its large end faces the first flow chamber (7).

3. The regulating valve body casting according to claim 2, characterized in that: A guide column (24) is formed in the first flow chamber (7) at one time. The guide column (24) is located between the control plate (11) and the bottom end of the lifting rod (15). The side of the control plate (11) away from the inlet (2) is connected to the first port (9) through a hinge. There are two guide columns (24), both of which are located in the peripheral direction of the control plate (11). One guide column (24) is close to the bottom end of the lifting rod (15), and the other guide column (24) is located on the same side of the control plate (11) as the connection. The steel wire (20) passes through the two guide columns (24) in sequence and is connected to the inner surface of the control plate (11).

4. The regulating valve body casting according to claim 3, characterized in that: A detour portion (25) is provided in the second flow chamber (8), the detour portion (25) protruding inwards from the top of the chamber wall of the second flow chamber (8), and the second port (10) is located between the detour portion (25) and the outlet (3).

5. The regulating valve body casting according to claim 4, characterized in that: A return spring (26) is connected to the lumen of the branch pipe (12). The return spring (26) is close to the control plate (11), and the other end of the return spring (26) is connected to the inner wall surface of the control plate (11). A rubber sheet (27) is provided on the outer circumferential surface of the control plate (11). When the control plate (11) rotates into the first port (9) to close the first port (9), the rubber sheet (27) on the outer circumferential surface is sealed on the lumen wall of the branch pipe (12). A limiting plate (31) is fixed in the branch pipe (12). One end of the return spring (26) located in the branch pipe (12) is connected to the limiting plate (31), and the middle part of the limiting plate (31) is communicated with the lumen of the branch pipe (12).

6. The regulating valve body casting according to claim 5, characterized in that: A positioning plate (28) is fixed in the expansion opening (21), and a drainage hole (29) is provided on the positioning plate (28). The upper end of the drainage hole (29) is communicated with the valve cavity (6), and the lower end of the drainage hole (29) is communicated with the first flow cavity (7). A positioning hole (30) is provided in the middle of the positioning plate (28), and the lifting rod (15) passes downward through the positioning hole (30) and enters the first flow cavity (7). The positioning hole (30) is polygonal, and the cross-sectional shape of the lifting rod (15) is polygonal. The polygonal shape of the lifting rod (15) matches the polygonal shape of the positioning hole (30). A limit block (32) located above the positioning plate (28) is fixed on the lifting rod (15).

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