Vacuum regulating valve with improved structure

Abstract

A vacuum regulating valve with an improved structure belongs to the technical field of vacuum. The air suction valve is installed on a pumped container and comprises a valve deck, a valve element, a spring and a valve seat, one end of the valve element is arranged in an inner cavity of the valve seat, the other end of the valve element extends out of the valve seat and forms an air suction gap with the valve deck, the spring is arranged in the valve element, one end of the spring abuts against the valve element, and the other end of the spring extends out of the valve element and abuts against the valve seat. The valve cover is in threaded connection with the valve seat, and an air suction gap between the valve element and the valve cover is adjusted by rotating the valve cover and adjusting the compression amount of the spring, and is characterized in that an air inlet channel and an air inlet communicated with the air inlet channel are formed in the valve cover, an inner conical surface is arranged in the valve cover, an outer conical surface is machined on the outer portion of the valve element, and the air inlet channel is communicated with the air inlet channel. A gap between the inner conical surface and the outer conical surface is an air suction gap, and air at the air inlet is introduced into a sucked container through the air suction gap. The device has the advantages of simple structure, convenience in operation and capability of accurately adjusting the vacuum degree.

Description

Technical Field

[0001] The utility model belongs to the technical field of vacuum, and particularly relates to a vacuum regulating valve with an improved structure. Background Art

[0002] A vacuum pump is a device that uses mechanical, physical, chemical, or a combination of physical and chemical methods to evacuate the container to be evacuated to obtain a vacuum. As a device for creating a negative pressure environment, a vacuum pump plays a very important role in modern industrial production. With the development of modern industrial technology, there are strict requirements for the range of vacuum degrees used. Too high, too low, or large fluctuations in the vacuum degree will have an adverse impact on industrial production, resulting in problems such as reduced product quality, unstable operation of production equipment, and decreased production efficiency.

[0003] In response to the above problems, in the prior art, a vacuum regulating valve is installed on the container to be evacuated to adjust the container to be evacuated to the required vacuum degree. The principle of the vacuum regulating valve is to control the vacuum degree of the container to be evacuated by regulating the intake gas flow rate of the valve. However, the existing vacuum regulating valve has a too complex structure, inconvenient operation, and also requires the assistance of tools to adjust and lock, which is laborious and time-consuming.

[0004] In view of the above existing technology, it is necessary to reasonably improve the structure of the existing vacuum regulating valve. For this reason, the applicant has made a beneficial design, and the technical solution to be introduced below is generated under this background. Summary of the Utility Model

[0005] The task of the utility model is to provide a vacuum regulating valve with an improved structure, which has a simple structure, convenient operation, and can accurately adjust the vacuum degree.

[0006] The task of the utility model is completed as follows: An improved structure of a vacuum regulating valve is installed on the container to be evacuated, including a valve cover, a valve core, a spring, and a valve seat. One end of the valve core is arranged in the inner cavity of the valve seat, and the other end extends out of the valve seat and forms an air intake gap with the valve cover. The spring is arranged inside the valve core, with one end abutted against the valve core and the other end extending out of the valve core and abutted against the valve seat. The valve cover and the valve seat are connected by threads. By rotating the valve cover, the compression amount of the spring is adjusted, and then the air intake gap between the valve core and the valve cover is adjusted. The feature is that the valve cover is provided with an air intake channel and an air intake port communicated with the air intake channel. The inner part of the valve cover is provided with an inner conical surface, and the outer part of the valve core is processed with an outer conical surface. The gap between the inner conical surface and the outer conical surface is the air intake gap, and the gas at the air intake port is introduced into the container to be evacuated through the air intake gap.

[0007] In a specific embodiment of the present utility model, the valve cover includes an inner wall and an outer wall that are both barrel-shaped bodies. An intake passage is formed between the inner wall and the outer wall, and an air inlet communicating with the intake passage is provided on the inner wall.

[0008] In another specific embodiment of the present utility model, the air inlet is arranged at the bottom of the barrel-shaped body of the inner wall, and the connection between the bottom and the body of the barrel-shaped body of the inner wall is processed into an inner conical surface.

[0009] In yet another specific embodiment of the present utility model, the valve core is of a barrel-shaped structure, and an outer conical surface is processed on the outside of the connection between the bottom and the body of the barrel-shaped body of the valve core.

[0010] In still another specific embodiment of the present utility model, the circumferential barrel body of the barrel-shaped body of the valve core is provided with a hollow, and the gas introduced through the suction gap is introduced into the container to be evacuated through the hollow.

[0011] In still another specific embodiment of the present utility model, a spring abutting portion for abutting one end of a spring is provided on the inner wall of the barrel-shaped body of the valve core, and the spring abutting portion is a convex table surface.

[0012] In a further specific embodiment of the present utility model, a circular groove is processed on the convex table surface, and when installing the spring, one end of the spring is embedded in the circular groove.

[0013] In an even further specific embodiment of the present utility model, a valve cover thread is processed deep in the inner cavity of the inner wall. The valve seat is a hollow connecting pipe, specifically including an upper connecting thread, a lower connecting thread, a middle convex table, and a middle air passage. The upper connecting thread is processed on the outer surface of the upper part of the valve seat for spiral cooperation with the valve cover thread. The lower connecting thread is processed on the outer surface of the lower part of the valve seat for connection with the container to be evacuated. The middle convex table is processed in the middle of the inner cavity of the hollow structure of the valve seat to prevent the valve core from slipping out of the valve seat and to abut the other end of the spring.

[0014] In a further still specific embodiment of the present utility model, a sink is processed on the middle convex table for embedding the other end of the spring.

[0015] In an even further still specific embodiment of the present utility model, when the vacuum regulating valve is installed, the upper part of the valve seat is located inside the valve cover, and a rubber ring is provided below the threaded connection between the valve seat and the valve cover.

[0016] Due to the adoption of the above structure, the utility model has the following beneficial effects: First, the regulating valve has a simple and reasonable structure. When the valve cover is rotated clockwise, the spring pressure increases, the suction gap between the outer conical surface of the valve core and the inner conical surface of the valve cover becomes smaller, the gas flow rate sucked into the vacuum regulating valve decreases, and the vacuum degree in the evacuated container rises. On the contrary, the vacuum degree drops. Rotating the valve cover can adjust the vacuum degree, and the operation is convenient; Second, under the impact of the air flow, the valve core can remain stable without jitter, achieving the effect of accurately adjusting the vacuum degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the vacuum regulating valve of the utility model;

[0018] Figure 2 is an exploded view of the vacuum regulating valve of the utility model;

[0019] Figure 3 is a three-dimensional view of the valve core of the utility model.

[0020] In the figure: 1. Valve cover, 11. Inner wall, 12. Outer wall, 13. Intake passage, 14. Intake port, 15. Inner conical surface, 16. Valve cover thread; 2. Valve core, 21. Outer conical surface, 22. Hollow, 23. Spring abutting part, 231. Ring groove; 3. Spring; 4. Rubber ring; 5. Valve seat, 51. Upper connection thread, 52. Lower connection thread, 53. Intermediate boss, 531. Sunk groove, 54. Intermediate air passage, 55. Rotating operation part; 10. Suction gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following describes in detail the specific embodiments of the utility model in conjunction with the drawings. However, the description of the embodiments does not limit the technical solution. Any change in form rather than substance based on the concept of the utility model should be regarded as the protection scope of the utility model.

[0022] In the following description, all directional or positional concepts such as up, down, left, right, front, and back are based on the positions shown in the corresponding drawings. It is only for the convenience of describing the technical solution provided by the utility model in conjunction with the drawings and simplifying the description, and thus cannot be understood as a special limitation on the technical solution provided by the utility model.

[0023] Please refer to Figure 1, the present utility model relates to a vacuum regulating valve with an improved structure, including a valve cover 1, a valve core 2, a spring 3, and a valve seat 5. One end of the valve core 2 is arranged in the inner cavity of the valve seat 5, and the other end extends out of the valve seat 5 and forms an air suction gap 10 with the valve cover 1. The spring 3 is arranged inside the valve core 2, with one end abutted against the valve core 2 and the other end extending out of the valve core 2 and abutted against the valve seat 5. The valve cover 1 and the valve seat 5 are connected by threads. By rotating the valve cover 1, the compression amount of the spring 3 is adjusted, and then the air suction gap 10 between the valve core 2 and the valve cover 1 is adjusted, so as to control the gas flow rate.

[0024] As Figure 1 shown, the valve cover 1 has two layers, specifically an inner wall 11 and an outer wall 12 that are both barrel-shaped. An air intake channel 13 is formed between the inner wall 11 and the outer wall 12. An air intake port 14 communicating with the air intake channel 13 is provided on the inner wall 11. In this embodiment, the air intake port 14 is arranged at the bottom of the barrel of the inner wall 11. The connection between the bottom and the body of the barrel of the inner wall 11 is processed into an inner conical surface 15. A valve cover thread 16 is processed deep in the inner cavity wall of the inner wall 11.

[0025] As Figures 1 to 3 shown, the valve core 2 is also of a barrel-shaped structure. The outer part of the connection between the bottom and the body of the barrel of the valve core 2 is processed into an outer conical surface 21. The gap between the inner conical surface 15 and the outer conical surface 21 is the air suction gap 10. The gas at the air intake port 14 is introduced into the container to be evacuated through the air suction gap 10. The size of the air suction gap 10 determines the size of the gas flow rate to be inhaled. A hollow 22 is provided on the circumferential barrel body of the barrel of the valve core 2. The gas introduced through the air suction gap 10 is introduced into the container to be evacuated through the hollow 22. A spring abutting part 23 for one end of the spring 3 to abut against is provided on the inner wall of the barrel of the valve core 2. The spring abutting part 23 can be a convex table surface. To further ensure the stability of the installation of the spring 3, a circular groove 231 is processed on the convex table surface. When installing the spring 3, one end of the spring 3 is embedded in the circular groove 231.

[0026] As Figure 1 and Figure 2As shown, the valve seat 5 is a hollow connecting pipe, specifically including an upper connecting thread 51, a lower connecting thread 52, an intermediate boss 53, and an intermediate air passage 54. The upper connecting thread 51 is machined on the outer surface of the upper part of the valve seat 5 for helically mating with the valve cover thread 16 of the valve cover. The lower connecting thread 52 is machined on the outer surface of the lower part of the valve seat 5 for connecting with a container to be evacuated such as a vacuum chamber or a vacuum device. The intermediate boss 53 is machined in the middle of the inner cavity of the hollow structure of the valve seat 5 to prevent the valve core 2 from slipping out of the valve seat 5 and can be used for the other end of the spring 3 to abut against. To further ensure the stability of the installation of the spring 3, a counterbore 531 is machined on the intermediate boss 53 for the other end of the spring 3 to be embedded. The intermediate air passage 54 penetrates the inner cavity of the valve seat 5.

[0027] When the vacuum regulating valve is installed, the upper connecting thread 51 of the valve seat 5 is screwed into the valve cover thread 16 of the valve cover 1 to achieve the threaded connection between the valve seat 5 and the valve cover 1. The upper part of the valve seat 5 is located inside the valve cover 1. A rubber ring 4 is provided below the threaded connection between the valve seat 1 and the valve cover 5. The rubber ring 4 prevents leakage at the threaded connection and also plays a role in preventing the valve cover 1 from loosening. The valve seat 5 is also machined with a polygonal rotating operation part 55 outside the valve cover 1 to assist in installing the vacuum regulating valve onto the container to be evacuated.

[0028] Please continue to refer to Figure 1 、 Figure 2 , the working principle of the vacuum regulating valve with an improved structure according to the present utility model is as follows: The vacuum regulating valve is installed on the container to be evacuated. Rotating the valve cover 1 can adjust the size of the suction gap, thereby achieving the adjustment of the vacuum degree. Specifically, when the valve cover 1 is rotated clockwise, the spring 3 is compressed, the spring pressure increases, and the spring 3 pushes the valve core 2 to reduce the suction gap 10 between the outer conical surface 21 and the inner conical surface 15. The gas flow rate inhaled into the vacuum regulating valve from the intake passage 13, the intake port 14 through the suction gap 10, the hollow 22, and the intermediate air passage 54 decreases, causing the vacuum degree in the container to be evacuated to rise. On the contrary, when the valve cover 1 is rotated counterclockwise, the spring 3 is released, the spring force decreases, the force of the spring 3 pushing the valve core 2 decreases, and the external air flow can push the valve core 2, thereby increasing the suction gap 10 between the outer conical surface 21 and the inner conical surface 15. The gas flow rate inhaled into the vacuum regulating valve from the intake passage 13, the intake port 14 through the suction gap 10, the hollow 22, and the intermediate air passage 54 increases, causing the vacuum degree in the container to be evacuated to decrease. During the entire working process, under the impact of the air flow, the valve core 2 can remain stable without jitter.

Claims

1. A vacuum regulating valve with an improved structure, installed on a container to be evacuated, comprising a valve cover (1), a valve core (2), a spring (3), and a valve seat (5), wherein one end of the valve core (2) is arranged in the inner cavity of the valve seat (5), and the other end extends out of the valve seat (5) and forms an air suction gap (10) with the valve cover (1), the spring (3) is arranged inside the valve core (2) and one end abuts against the valve core (2), and the other end extends out of the valve core (2) and abuts against the valve seat (5), the valve cover (1) and the valve seat (5) are connected by threads, and the compression of the spring (3) is adjusted by rotating the valve cover (1), thereby adjusting the air suction gap (10) between the valve core (2) and the valve cover (1), characterized in that: The valve cover (1) is provided with an air inlet channel (13) and an air inlet port (14) connected to the air inlet channel (13); the interior of the valve cover (1) is provided with an inner conical surface (15); the exterior of the valve core (2) is processed with an outer conical surface (21); the gap between the inner conical surface (15) and the outer conical surface (21) is an air suction gap (10); the air suction gap (10) allows the gas at the air inlet port (14) to pass into the container to be pumped.

2. The vacuum regulating valve according to claim 1, characterized in that: The valve cover (1) comprises an inner wall (11) and an outer wall (12) both of which are barrel-shaped, an air intake passage (13) is formed between the inner wall (11) and the outer wall (12), and an air intake port (14) communicating with the air intake passage (13) is provided on the inner wall (11).

3. The vacuum regulating valve according to claim 2, characterized in that: The air inlet (14) is arranged at the bottom of the barrel of the barrel-shaped body of the inner wall (11), and the connection between the bottom of the barrel of the barrel-shaped body of the inner wall (11) and the barrel body is processed into an inner conical surface (15).

4. The vacuum regulating valve according to claim 1, characterized in that: The valve core (2) is a barrel-shaped structure, and an outer conical surface (21) is processed on the outside of the connection between the barrel bottom and the barrel body of the barrel-shaped body of the valve core (2).

5. The vacuum regulating valve according to claim 4, characterized in that: A hollow (22) is provided on the circumferential barrel of the barrel-shaped body of the valve core (2), and the hollow (22) allows the gas introduced through the suction gap (10) to pass into the container to be pumped.

6. The vacuum regulating valve according to claim 4, characterized in that: A spring abutment portion (23) for abutting one end of the spring (3) is provided on the inner wall of the barrel-shaped body of the valve core (2), and the spring abutment portion (23) is a convex table surface.

7. The vacuum regulating valve according to claim 6, characterized in that: A circle of annular groove (231) is processed on the boss surface, and when the spring (3) is installed, one end of the spring (3) is embedded in the annular groove (231).

8. The vacuum regulating valve according to claim 2, characterized in that: A valve cover thread (16) is machined deep in the inner cavity of the inner wall (11); the valve seat (5) is a hollow connecting tube, specifically comprising an upper connecting thread (51), a lower connecting thread (52), an intermediate boss (53) and an intermediate air channel (54); the upper connecting thread (51) is machined on the outer surface of the upper part of the valve seat (5) for spirally cooperating with the valve cover thread (16); the lower connecting thread (52) is machined on the outer surface of the lower part of the valve seat (5) for connecting with a pumped container; the intermediate boss (53) is machined in the middle of the inner cavity of the hollow structure of the valve seat (5) to block the valve core (2) from sliding off the valve seat (5) and for the other end of the spring (3) to abut against.

9. The vacuum regulating valve according to claim 8, characterized in that: A recessed groove (531) is machined on the middle boss (53) for embedding the other end of the spring (3).

10. The vacuum regulating valve with improved structure according to claim 1, characterized in that: When the vacuum regulating valve is installed, the upper part of the valve seat (5) is located inside the valve cover (1), and a rubber ring (4) is arranged below the threaded connection between the valve seat (5) and the valve cover (1).

Images