A pressure-bearing CPVC gate valve

Abstract

This utility model relates to the field of gate valve technology, and in particular to a pressure-bearing CPVC gate valve, comprising a valve body, with reinforcing ribs fixedly connected to both the left and right sides of the valve body's inner cavity. A base sleeve is fixedly installed in the middle of the valve body's inner cavity. A valve cover is bolted to the top of the valve body, and a guide sleeve is fixedly connected to the middle of the top of the valve cover. A nut plate is bolted to the top of the valve cover, and a valve stem is threaded through the inner cavity of the nut plate. The bottom of the valve stem passes through the guide sleeve and the valve cover sequentially and extends into the inner cavity of the valve body. A valve core is bolted to the bottom of the valve stem. The guide sleeve includes a sleeve body, and an oil reservoir is formed at the top of the sleeve body. The reinforcing ribs fixedly installed on the valve wall at the corner of the valve body's inner cavity increase the overall strength of the valve wall at the corner, effectively dispersing the impact force of the medium, eliminating stress concentration, and improving the pressure-bearing strength of the connection parts.

Description

Technical Field

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

[0002] CPVC (chlorinated polyvinyl chloride) material is widely used in valve manufacturing due to its excellent corrosion resistance, high temperature resistance and good mechanical properties. Gate valves, as a commonly used flow control valve, realize the opening and closing of pipelines through the cooperation of valve core and valve seat, and play an important role in water supply and drainage, chemical industry, HVAC and other systems.

[0003] A search revealed that the announcement number is CN220416415U, and the name is a pressure-bearing CPVC gate valve, which includes a valve body with water inlets at both ends. Through research and analysis, it was found that although the locking rod is inserted into the drive rod to lock it and prevent it from rotating due to external factors, and the locking rod can also move up and down, which is beneficial for the locking rod to be adaptively adjusted with the extension and retraction of the drive rod, it still has the following defects to a certain extent.

[0004] For example, there are shortcomings in pressure bearing performance. The valve body is made of one-piece injection molding, and the wall thickness at the corner of the flow channel inside the valve cavity is uneven. Under the impact of high pressure medium, stress concentration is easily generated, which can lead to safety hazards such as valve body cracking and leakage. Moreover, it is not convenient to automatically lubricate the valve stem, resulting in greater friction between the valve stem and the valve. It is more difficult to turn the valve stem, and it is easy to wear after long-term use, affecting the fitting accuracy. In order to solve the above technical problems, we have designed a pressure-bearing CPVC gate valve. Utility Model Content

[0005] The purpose of this utility model is to provide a pressure-bearing CPVC gate valve, which has the advantages of improving pressure-bearing performance, effectively dispersing stress concentration, facilitating lubrication, making the rotation of the rod less laborious, and extending service life. It solves the problems of poor pressure-bearing performance, easy stress concentration under high-pressure medium impact, leading to valve body cracking and leakage, inconvenience in lubricating the rod, laborious rotation of the rod, easy wear, affecting fitting accuracy, and shortening service life.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure-bearing CPVC gate valve, comprising a valve body, wherein reinforcing ribs are fixedly connected to both the left and right sides of the valve body cavity, a base sleeve is fixedly installed in the middle of the valve body cavity, a valve cover is bolted to the top of the valve body, a guide sleeve is fixedly connected to the middle of the top of the valve cover, a nut plate is bolted to the top of the valve cover, a valve stem is threaded through the inner cavity of the nut plate, the bottom of the valve stem passes through the guide sleeve and the valve cover in sequence and extends into the inner cavity of the valve body, and a valve core is bolted to the bottom of the valve stem.

[0007] Preferably, the guide sleeve includes a sleeve body, the top of the sleeve body is provided with an oil storage groove, the inner side of the inner cavity of the oil storage groove is provided with an oil inlet hole, and the top of the oil storage groove is interference-fitted with a sealing cap.

[0008] Preferably, reinforcing plates are fixedly connected to both the left and right sides of the outer surface of the valve body, and the number of reinforcing plates is several and they are evenly distributed.

[0009] Preferably, a handwheel is bolted to the top of the valve stem, and a filter screen is fixedly installed at the bottom of the inner cavity of the base sleeve.

[0010] Preferably, a sealing slot is provided at the top of the base sleeve, and a sealing ring is fixedly connected to the outer side of the bottom of the valve core.

[0011] Preferably, a sealing groove is provided on the top of the valve body, and a limiting groove is provided on the outer side of the inner cavity of the sealing groove. The inner cavities of the sealing groove and the limiting groove are filled with sealing gaskets.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The reinforcing ribs fixedly installed on the valve wall at the corner of the valve body increase the overall strength of the valve wall at the corner, effectively disperse the impact force of the medium, eliminate stress concentration, and improve the pressure resistance of the connection parts.

[0014] 2. The valve stem moves up and down within the sleeve body. Lubricant flows out through the upper oil hole and adheres to the surface of the valve stem for lubrication. This can significantly reduce the coefficient of friction, reduce the frictional resistance when the valve stem is raised and lowered, make the handwheel rotation easier, reduce scratches on the valve stem surface and wear on the inner diameter of the sleeve body, and extend the maintenance cycle of the fit accuracy between the valve stem and the sleeve body. Attached Figure Description

[0015] Figure 1 This is an axonometric view of the structure of this utility model;

[0016] Figure 2 This is a sectional bottom view of the valve body of this utility model;

[0017] Figure 3 This is a front sectional axial view of the valve body of this utility model;

[0018] Figure 4 This is a cross-sectional axonometric view of the guide sleeve of this utility model;

[0019] Figure 5 This is a top sectional view and axonometric view of the valve body of this utility model;

[0020] Figure 6 This utility model Figure 5A magnified view of A in the middle.

[0021] In the diagram: 1. Valve body; 2. Valve cover; 3. Nut plate; 4. Handwheel; 5. Guide sleeve; 6. Reinforcing plate; 7. Valve stem; 8. Valve core; 9. Filter screen; 10. Base sleeve; 11. Reinforcing rib; 12. Sealing ring; 13. Sealing cap; 14. Oil inlet hole; 15. Oil reservoir; 16. Sleeve body; 17. Sealing gasket; 18. Sealing slot; 19. Sealing groove; 20. Limiting groove. Detailed Implementation

[0022] Please see Figures 1-6 A pressure-bearing CPVC gate valve includes a valve body 1. Reinforcing ribs 11 are fixedly connected to the left and right sides of the inner cavity of the valve body 1. The reinforcing ribs 11 and the valve body 1 are integrally formed. A base sleeve 10 is fixedly installed in the middle of the inner cavity of the valve body 1. The base sleeve 10 and the valve body 1 are integrally formed. A valve cover 2 is bolted to the top of the valve body 1. A guide sleeve 5 is fixedly connected to the middle of the top of the valve cover 2. A nut plate 3 is bolted to the top of the valve cover 2. By setting the nut plate 3, it can be threadedly connected to the valve stem 7. Rotating forward or backward will cause the valve core 8 to move up and down. The valve stem 7 is threaded through the inner cavity of the nut plate 3. The bottom of the valve stem 7 passes through the guide sleeve 5 and the valve cover 2 in sequence and extends to the inner cavity of the valve body 1. The valve core 8 is bolted to the bottom of the valve stem 7.

[0023] Please see Figure 4 The guide sleeve 5 includes a sleeve body 16, which may be made of polytetrafluoroethylene. An oil reservoir 15 is provided on the top of the sleeve body 16. The oil reservoir 15 may be filled with molybdenum disulfide solid lubricant. An oil inlet hole 14 is provided on the inner side of the inner cavity of the oil reservoir 15. A sealing cap 13 is interference-fitted on the top of the oil reservoir 15. The sealing cap 13 is made of corrosion-resistant rubber.

[0024] Please see Figure 1 Reinforcing plates 6 are fixedly connected to both sides of the outer surface of the valve body 1. The reinforcing plates 6 are integrally formed structures of the valve body 1, which can improve the support force of the valve body 1 to the connecting flanges on both sides and enhance the pressure resistance of the connection parts. There are several reinforcing plates 6, which are evenly distributed.

[0025] Please see Figure 2 A handwheel 4 is bolted to the top of the valve stem 7, and a filter screen 9 is fixedly installed at the bottom of the inner cavity of the base sleeve 10. The filter screen 9 is made of stainless steel and can filter impurities flowing into the water from the left side, preventing the valve core 8 from being damaged by impurities and extending its service life.

[0026] Please see Figure 2 and Figure 5The top of the base sleeve 10 is provided with a sealing slot 18. After the valve core 8 is closed, the sealing ring 12 at the bottom of the valve core 8 is inserted into the sealing slot 18 to improve the sealing performance of the valve core 8 after it is closed. The sealing ring 12 is fixedly connected to the outer side of the bottom of the valve core 8.

[0027] Please see Figure 6 The valve body 1 has a sealing groove 19 on the top and a limiting groove 20 on the outer side of the inner cavity of the sealing groove 19. The convex ring on the outer side of the sealing gasket 17 is inserted into the limiting groove 20 for limiting. The inner cavities of the sealing groove 19 and the limiting groove 20 are filled with the sealing gasket 17. The sealing groove 19 has a stepped design and the sealing gasket 17 has a double-layer structure. The upper layer is made of polytetrafluoroethylene and the lower layer is made of nitrile rubber, which ensures the sealing performance and prevents the sealing gasket 17 from moving under high pressure.

[0028] In use, a row of equidistant reinforcing ribs 11 are fixedly connected to the valve wall at the left and right corners of the inner cavity of the valve body 1. The reinforcing ribs 11 can increase the overall strength of the valve wall at the corner, effectively disperse the impact force of the medium, eliminate stress concentration, and improve the pressure resistance of the connection. Remove the sealing cap 13 from the top of the oil reservoir 15, pour the lubricant into the oil reservoir 15 and cover it with the sealing cap 13. During the rotation of the valve stem 7, the valve stem 7 moves up and down in the sleeve body 16. The lubricant in the oil reservoir 15 flows out through a ring of oil holes 14 and adheres to the surface of the valve stem 7 for automatic lubrication. This can significantly reduce the coefficient of friction, reduce the frictional resistance when the valve stem 7 rises and falls, make the handwheel rotation easier, and avoid dry friction wear between the valve stem 7 and the sleeve body 16. This reduces scratches on the surface of the valve stem 7 and wear on the inner diameter of the sleeve body 16, extends the maintenance cycle of the fit accuracy between the valve stem 7 and the sleeve body 16, and effectively extends the service life of the gate valve.

[0029] In summary, this pressure-bearing CPVC gate valve, through the coordinated use of valve body 1, valve cover 2, valve stem 7, valve core 8, reinforcing rib 11, oil inlet 14, and oil reservoir 15, solves the problems of poor pressure bearing performance, easy stress concentration under high pressure medium impact leading to valve body cracking and leakage, inconvenience in lubricating the stem, difficulty in rotating the stem, easy wear, affecting fitting accuracy, and shortening service life.

Claims

1. A pressure-rated CPVC stop valve comprising a valve body (1), characterised in that: The valve body (1) has reinforcing ribs (11) fixedly connected to both sides of the inner cavity. A base sleeve (10) is fixedly installed in the middle of the inner cavity of the valve body (1). A valve cover (2) is installed on the top of the valve body (1) by bolts. A guide sleeve (5) is fixedly connected to the middle of the top of the valve cover (2). A nut plate (3) is installed on the top of the valve cover (2) by bolts. A valve stem (7) is threaded through the inner cavity of the nut plate (3). The bottom of the valve stem (7) passes through the guide sleeve (5) and the valve cover (2) in sequence and extends to the inner cavity of the valve body (1). A valve core (8) is installed on the bottom of the valve stem (7) by bolts.

2. A pressure rated CPVC stop valve as claimed in claim 1, wherein: The guide sleeve (5) includes a sleeve body (16), the top of the sleeve body (16) is provided with an oil storage groove (15), the inner side of the inner cavity of the oil storage groove (15) is provided with an oil inlet hole (14), and the top of the oil storage groove (15) is fitted with a sealing cap (13).

3. The pressure-bearing CPVC gate valve according to claim 1, characterized in that: The valve body (1) has a number of reinforcing plates (6) fixedly connected to both sides of its outer surface. The reinforcing plates (6) are distributed at equal intervals.

4. The pressure-bearing CPVC gate valve according to claim 1, characterized in that: A handwheel (4) is bolted to the top of the valve stem (7), and a filter screen (9) is fixedly installed at the bottom of the inner cavity of the base sleeve (10).

5. A pressure-bearing CPVC gate valve according to claim 1, characterized in that: The top of the base sleeve (10) is provided with a sealing slot (18), and a sealing ring (12) is fixedly connected to the outer side of the bottom of the valve core (8).

6. A pressure-bearing CPVC gate valve according to claim 1, characterized in that: The valve body (1) has a sealing groove (19) on its top, and a limiting groove (20) is provided on the outer side of the inner cavity of the sealing groove (19). The inner cavities of the sealing groove (19) and the limiting groove (20) are filled with sealing gaskets (17).

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