Valve with wide applicable pressure range

Abstract

The utility model relates to the technical field of valves, in particular to a valve wide in applicable pressure range, which comprises a valve body and a sealing plate, a valve cover is mounted on the outer wall of the top end of the valve body, a valve rod is rotatably mounted on the inner wall of the valve cover, a hand wheel is fixedly connected to the outer wall of the top end of the valve rod, and an annular plate is fixedly connected to the outer wall of the bottom end of the hand wheel. A mounting groove is formed in the inner wall of one side of the top of the valve cover, telescopic rods are fixedly connected to the inner walls of one sides of the top and the bottom of the mounting groove, limiting balls are fixedly connected to the outer walls of one ends of piston rods of the telescopic rods, and springs sleeve the outer walls of the telescopic rods; before and after the annular plate rotates, the limiting ball is matched with the limiting groove for limiting, the rotating angle of the hand wheel can be determined, the valve element and the valve seat are perfectly matched to guarantee normal use of the valve when the limiting ball is just clamped and inserted into the limiting groove, the sealing effect between the hand wheel and the valve cover is enhanced through the sealing plate, and the use efficiency of the valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve with a wide applicable pressure range. Background Technique

[0002] Most of the existing plug valves adopt an integral plug body. Through the pre-tightening method during assembly, a certain pre-tightening force is generated between the plug body and the valve body sealing surface to achieve sealing. With this structure, with each opening and closing of the valve, the plug body and the valve body sealing surface will be worn to varying degrees. Especially if there are particulate matters in the medium, it will cause serious scratches, and ultimately lead to the sealing failure of the valve in a short time; and due to the large friction during the opening and closing process, the opening and closing are very laborious.

[0003] After retrieving the Chinese patent with the publication number CN213361180U, it discloses an expansion valve with a wide applicable range. By rotating the handwheel, the valve stem rotates, so that the valve core and the valve seat cooperate, and then the closing of the valve is realized. On the contrary, rotating the handwheel in the reverse direction makes the valve stem rotate, and the opening of the valve can be realized; the whole process is simple to operate. The valve cover sealing sleeve is used to prevent impurities from entering the inside of the valve cover and avoid the situation that the valve stem is stuck due to excessive friction.

[0004] Based on the above retrieval and the existing technology, it is found that the above patent has certain defects. By rotating the handwheel, the valve core and the valve seat cooperate to close the valve, and rotating the handwheel in the reverse direction can open the valve. However, it is difficult to accurately measure the angle that the handwheel needs to rotate during the rotation of the handwheel. Too loose or too tight rotation will cause a gap between the valve core and the valve seat, affecting the normal use of the valve, and the sealing performance between the handwheel and the valve cover is poor, reducing the use efficiency of the valve. Content of the Utility Model

[0005] The purpose of the utility model is to provide a valve with a wide applicable pressure range to solve the problems raised in the above background technique.

[0006] The technical solution of the utility model is: a valve with a wide applicable pressure range, including a valve body and a sealing plate. The outer wall of the top of the valve body is provided with a valve cover. The inner wall of the valve cover is rotatably installed with a valve stem. The outer wall of the top of the valve stem is fixedly connected with a handwheel. The outer wall of the bottom of the handwheel is fixedly connected with an annular plate. One side inner wall of the top of the valve cover is provided with an installation groove. One side inner walls of the top and bottom of the installation groove are fixedly connected with telescopic rods respectively. One end outer walls of the piston rods of the telescopic rods are fixedly connected with limiting balls respectively. Springs are sleeved on the outer walls of the telescopic rods respectively. One side outer walls of the top and bottom of the annular plate are provided with limiting grooves. The outer wall of the top of the valve cover is provided with a sealing groove. Both sides outer walls of the top of the sealing plate are fixedly connected with fixing blocks. The fixing blocks are respectively connected to the outer walls of both sides of the bottom of the handwheel through bolts.

[0007] Preferably, a sealing protrusion is provided on the inner wall of the bottom of the sealing plate, and the sealing protrusion is slidably connected to the inner wall of the sealing groove.

[0008] Preferably, slide rails are provided on both the outer wall of the top and the outer wall of the bottom of the annular plate. The limiting balls are all adapted to the size of the limiting grooves, and the limiting balls are all adapted to the height of the slide rails.

[0009] Preferably, a valve core is installed on the outer wall of the bottom end of the valve stem, a valve seat is installed on the inner wall of the valve body, and the valve core is adapted to the size of the valve seat.

[0010] Preferably, a packing layer is provided on the inner wall of the bottom of the valve cover, and both ends of the spring are fixedly connected to the limiting ball and the valve cover respectively.

[0011] The present utility model hereby provides a valve applicable to a wide pressure range through improvement. Compared with the prior art, it has the following improvements and advantages:

[0012] First: By providing a handwheel, a valve cover, a limiting ball, an annular plate, a sealing plate and a valve stem, the limiting ball connected by the telescopic rod enters the limiting groove to limit the annular plate. The rotation of the annular plate is blocked to indicate that the handwheel has been rotated to a proper position, and the annular plate is ensured to be stable by the limiting ball. The rotation of the valve stem stops, and the cooperation between the valve core and the valve seat is more stable. When it is necessary to open the valve, only a force greater than that of the spring needs to be applied to move the limiting ball out of the limiting groove. A fixing block and a sealing plate are installed at the bottom of the handwheel through bolts. The sealing plate is connected to the sealing groove on the valve cover through the sealing protrusion, further improving the sealing performance between the handwheel and the valve cover. Before and after the rotation of the annular plate, the limiting ball cooperates with the limiting groove for limiting, and the rotation angle of the handwheel can be determined. When the limiting ball just snaps into the limiting groove, the valve core and the valve seat are perfectly matched to ensure the normal use of the valve, and the sealing effect between the handwheel and the valve cover is enhanced through the sealing plate, improving the use efficiency of the valve.

[0013] Second: By providing an annular plate, a slide rail, a telescopic rod and a spring, a slide rail is provided on the outer wall of the annular plate, making the sliding of the limiting ball more stable and not easily deviated. The spring facilitates the reset of the limiting ball, and the telescopic rod ensures the horizontal movement of the limiting ball in and out of the limiting groove, improving the practicability of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further explains the present utility model in conjunction with the drawings and embodiments:

[0015] Figure 1 is the overall structural sectional view of the present utility model;

[0016] Figure 2 is the Figure 1 enlarged view of Structure A in the present utility model;

[0017] Figure 3 This is a schematic diagram of the handwheel structure of the present utility model.

[0018] Explanation of reference numerals:

[0019] 1. Valve body; 2. Valve core; 3. Valve seat; 4. Valve cover; 5. Valve rod; 6. Handwheel; 7. Sealing plate; 8. Sealing groove; 9. Spring; 10. Telescopic rod; 11. Limit ball; 12. Annular plate; 13. Fixed block; 14. Slide rail; 15. Limit groove. Detailed implementation manners

[0020] The present utility model will be described in detail below. The technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0021] The present utility model provides a valve with a wide applicable pressure range through improvement. The technical solution of the present utility model is as follows:

[0022] As Figures 1-3 shown, a valve with a wide applicable pressure range includes a valve body 1 and a sealing plate 7. The outer wall of the top end of the valve body 1 is provided with a valve cover 4. The inner wall of the valve cover 4 is rotatably provided with a valve rod 5. The outer wall of the top end of the valve rod 5 is fixedly connected with a handwheel 6. The outer wall of the bottom end of the handwheel 6 is fixedly connected with an annular plate 12. An installation groove is opened on one side inner wall of the top of the valve cover 4. One side inner walls of the top and bottom of the installation groove are fixedly connected with telescopic rods 10 respectively. One end outer walls of the piston rods of the telescopic rods 10 are fixedly connected with limit balls 11 respectively. Springs 9 are sleeved on the outer walls of the telescopic rods 10 respectively. Limit grooves 15 are opened on one side outer walls of the top and bottom of the annular plate 12. A sealing groove 8 is opened on the outer wall of the top of the valve cover 4. Fixed blocks 13 are fixedly connected to both outer walls of the two sides of the top of the sealing plate 7. The fixed blocks 13 are respectively connected to the outer walls of the two sides of the bottom end of the handwheel 6 through bolts.

[0023] Furthermore, a sealing protrusion is provided on the bottom inner wall of the sealing plate 7. The sealing protrusion is slidably connected to the inner wall of the sealing groove 8. Slide rails 14 are provided on both the top and bottom outer walls of the annular plate 12. The limit balls 11 are all adapted to the sizes of the limit grooves 15. The limit balls 11 are all adapted to the heights of the slide rails 14. Slide rails 14 are provided on the outer wall of the annular plate 12, making the sliding of the limit balls 11 more stable and not easily deviated.

[0024] Furthermore, a valve core 2 is installed on the outer wall of the bottom end of the valve stem 5, a valve seat 3 is installed on the inner wall of the valve body 1, the sizes of the valve core 2 and the valve seat 3 are adapted to each other, a packing layer is arranged on the inner wall of the bottom of the valve cover 4, and the two ends of the spring 9 are fixedly connected to the limit ball 11 and the valve cover 4 respectively.

[0025] Working principle: When the valve needs to be closed during use, rotate the handwheel 6, so that the annular plate 12 at the bottom of the handwheel 6 rotates on the inner wall of the top of the valve cover 4 accordingly. When the limit groove 15 on the annular plate 12 rotates to the position of the limit ball 11, the valve core 2 connected to the valve stem 5 just cooperates with the valve seat 3 to close the valve, and the feed port and the discharge port are blocked. At this time, the limit ball 11 connected to the telescopic rod 10 enters the limit groove 15 to limit the annular plate 12. The rotation of the annular plate 12 is blocked, indicating that the handwheel 6 has rotated to the appropriate position, and the annular plate 12 is limited by the limit ball 11 to ensure the stability of the annular plate 12. The rotation of the valve stem 5 stops, and the cooperation between the valve core 2 and the valve seat 3 is more stable. When the valve needs to be opened, just apply a force greater than that of the spring 9 to move the limit ball 11 out of the limit groove 15. A fixed block 13 and a sealing plate 7 are installed at the bottom of the handwheel 6 through bolts. The sealing plate 7 is connected to the sealing groove 8 on the valve cover 4 through a sealing protrusion, further improving the sealing performance between the handwheel 6 and the valve cover 4. A slide rail 14 is arranged on the outer wall of the annular plate 12, making the sliding of the limit ball 11 more stable and not easy to deviate. The spring 9 facilitates the reset of the limit ball 11, and the telescopic rod 10 ensures the horizontal movement of the limit ball 11 in and out of the limit groove 15.

[0026] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above technical means, but also include the technical solutions composed of equivalent replacements of the above technical features. The matters not covered in the present invention belong to the common general knowledge of those skilled in the art.

Claims

1. A valve with a wide applicable pressure range, comprising a valve body (1) and a sealing plate (7), characterized in that: A valve cover (4) is mounted on the top outer wall of the valve body (1); a valve stem (5) is rotatably mounted on the inner wall of the valve cover (4); a hand wheel (6) is fixedly connected to the top outer wall of the valve stem (5); an annular plate (12) is fixedly connected to the bottom outer wall of the hand wheel (6); a mounting groove is provided on one inner wall of the top of the valve cover (4); a telescopic rod (10) is fixedly connected to the top and bottom inner walls of the mounting groove; a limiting ball (11) is fixedly connected to the outer wall of one end of the piston rod of the telescopic rod (10); a spring (9) is sleeved on the outer wall of the telescopic rod (10); a limiting groove (15) is provided on the top and bottom outer walls of the annular plate (12); a sealing groove (8) is provided on the top outer wall of the valve cover (4); and fixing blocks (13) are fixedly connected to the two outer walls of the bottom of the hand wheel (6) by bolts.

2. A valve with a wide applicable pressure range according to claim 1, characterized in that: The bottom inner wall of the sealing plate (7) is provided with a sealing protrusion, and the sealing protrusion is slidably connected to the inner wall of the sealing groove (8).

3. A valve with a wide applicable pressure range according to claim 1, characterized in that: The top and bottom outer walls of the annular plate (12) are both provided with slide rails (14), the limiting balls (11) are both adapted to the size of the limiting grooves (15), and the limiting balls (11) are both adapted to the height of the slide rails (14).

4. A valve with a wide applicable pressure range according to claim 1, characterized in that: A valve core (2) is mounted on the outer wall of the bottom end of the valve stem (5), and a valve seat (3) is mounted on the inner wall of the valve body (1); the sizes of the valve core (2) and the valve seat (3) are matched.

5. A valve with a wide applicable pressure range according to claim 1, characterized in that: A packing layer is provided on the inner wall of the bottom of the valve cover (4), and the two ends of the spring (9) are fixedly connected to the limiting ball (11) and the valve cover (4) respectively.

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