Large-flow vacuum regulating valve

Abstract

The utility model relates to the technical field of vacuum equipment, and discloses a large-flow vacuum regulating valve which comprises a valve body, a regulating knob is in threaded connection with the interior of the valve body, a sliding groove is formed in the outer wall of the regulating knob, and a first reset spring is fixedly connected with the interior of the regulating knob. And the outer wall of the first reset spring is slidably connected to the inner wall of the sliding groove, the top end of the first reset spring is rotationally connected with a connecting block, the upper surface of the connecting block is fixedly connected with a connecting rod, and the outer wall of the connecting rod is slidably connected with a second reset spring. According to the utility model, the sealing gasket is pressed down to close the overflow port, and the vacuum in the first working port cannot enter the working chamber, so that the second working port is not vacuum, the effect of completely closing or completely opening the regulating valve is achieved, the flow can be effectively controlled and kept within a required range, the normal operation of a system is favorably maintained, and the service life of the regulating valve is prolonged. And the condition of overload or overhigh pressure is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum equipment, in particular to a large-flow vacuum regulating valve. Background Art

[0002] A large-flow vacuum regulating valve is a device used to control the vacuum pressure of the flowing medium in the system. It is usually composed of components such as a valve body, a valve cover, a valve core, a valve seat, a piston and a spring. The design purpose of this regulating valve is to ensure that the required vacuum pressure level is maintained in the pipeline system to ensure the normal operation of the system. Large-flow vacuum regulating valves are usually used in industrial applications that need to handle large amounts of fluid or gas, such as air-conditioning systems, vacuum distillation units, petrochemical plants, and food processing industries. They can automatically adjust the valve opening according to system requirements to achieve the required vacuum pressure level, and can quickly respond to changes in the system to ensure system stability and efficiency.

[0003] During use, the existing large-flow vacuum regulating valve is not convenient for achieving the effect of completely closing or completely opening the regulating valve, and thus cannot effectively control the flow rate to keep it within the required range. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a large-flow vacuum regulating valve, aiming to improve the problem in the prior art that it is not easy to achieve the effect of fully closing or fully opening the regulating valve.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A large-flow vacuum regulating valve comprises a valve body, an adjusting knob is connected to the internal thread of the valve body, a sliding groove is provided on the outer wall of the adjusting knob, a first return spring is fixedly connected to the inside of the adjusting knob, the outer wall of the first return spring is slidably connected to the inner wall of the sliding groove, the top end of the first return spring is rotatably connected to a connecting block, the upper surface of the connecting block is fixedly connected to a connecting rod, the outer wall of the connecting rod is slidably connected to a second return spring, the top end of the second return spring is fixedly connected to the inside of the valve body, the outer wall of the connecting rod is fixedly connected to a sealing gasket, a vacuum inlet is provided inside the valve body, a first working port is provided inside the valve body, an overflow port is provided inside the valve body, a working chamber is provided inside the valve body, a second working port is provided inside the valve body, and an adjusting component is arranged inside the valve body.

[0007] Preferably, the regulating assembly comprises a valve ball, the outer wall of the valve ball is slidably connected to the inside of the valve body, the outer wall of the valve ball is fixedly connected to the inside of the regulating knob, and a working air passage is opened inside the valve body.

[0008] Preferably, the outer wall of the connecting rod is slidably connected to the interior of the valve body, and the bottom end of the second return spring is fixedly connected to the outer wall of the connecting rod.

[0009] Preferably, a limit block chamber is opened inside the valve body, and a top chamber is opened inside the valve body.

[0010] Preferably, a top limit block is fixedly connected to the outer wall of the connecting rod, and an elastic diaphragm is fixedly connected to the upper surface of the top limit block.

[0011] Preferably, the outer wall of the top limit block is slidably connected to the inner wall of the limit block chamber.

[0012] Preferably, the upper surface of the connecting rod is fixedly connected to the lower surface of the elastic diaphragm.

[0013] Preferably, a vacuum detection observation port is opened inside the valve body.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, the sealing gasket is pressed down to close the overflow port, and the vacuum in the first working port cannot enter the working chamber, so that there is no vacuum at the second working port, thereby achieving the effect of fully closing or fully opening the regulating valve, and then the flow rate can be effectively controlled to keep it within the required range, which helps to maintain the normal operation of the system and prevent overload or excessive pressure.

[0016] 2. In the utility model, the connecting rod is simultaneously moved downward by the force of the second return spring. At this time, the deformation of the elastic diaphragm can be observed through the vacuum detection observation port to confirm whether there is a vacuum at the second working port, thereby achieving the effect of checking the vacuum, and then the operating status and vacuum level of the system can be monitored, which is helpful to timely discover possible problems or abnormal conditions in the system so as to take corresponding measures to adjust or repair them. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a valve body of a large flow vacuum regulating valve proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of a first return spring of a large flow vacuum regulating valve proposed by the utility model;

[0019] Figure 3 The utility model is a schematic diagram of a connecting rod of a large flow vacuum regulating valve.

[0020] Legend:

[0021] 1. Valve body; 2. Adjustment knob; 3. Slide groove; 4. First return spring; 5. Connecting rod; 6. Second return spring; 7. Sealing gasket; 8. Vacuum inlet; 9. First working port; 10. Overflow port; 11. Working chamber; 12. Second working port; 13. Valve ball; 14. Connecting block; 15. Working airway; 16. Limit block chamber; 17. Top chamber; 18. Elastic diaphragm; 19. Top limit block; 20. Vacuum detection observation port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings of the specification of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 - Figure 2 The utility model provides an embodiment: a large flow vacuum regulating valve, comprising a valve body 1, an adjusting knob 2 is connected to the inner thread of the valve body 1, a slide groove 3 is provided on the outer wall of the adjusting knob 2, a first return spring 4 is fixedly connected to the inner wall of the slide groove 3, the outer wall of the first return spring 4 is slidably connected to the inner wall of the slide groove 3, the top of the first return spring 4 is rotatably connected to a connecting block 14, the upper surface of the connecting block 14 is fixedly connected to a connecting rod 5, the outer wall of the connecting rod 5 is slidably connected to a second return spring 6, the top of the second return spring 6 is fixedly connected to the valve body 1 The outer wall of the connecting rod 5 is fixedly connected with a sealing gasket 7, a vacuum inlet 8 is provided inside the valve body 1, a first working port 9 is provided inside the valve body 1, an overflow port 10 is provided inside the valve body 1, a working chamber 11 is provided inside the valve body 1, a second working port 12 is provided inside the valve body 1, and an adjusting component is provided inside the valve body 1; the adjusting component includes a valve ball 13, an outer wall of the valve ball 13 is slidably connected to the inside of the valve body 1, an outer wall of the valve ball 13 is fixedly connected to the inside of the adjusting knob 2, and a working airway 15 is provided inside the valve body 1;

[0024] Specifically, by adjusting the knob 2, the effect of closing or opening the transmission of vacuum gas can be achieved. The more times the adjusting knob 2 is rotated clockwise, the greater the opening distance of the overflow port 10, the greater the vacuum flow at the working chamber 11, and the higher the vacuum degree at the second working port 12. On the contrary, the more times the adjusting knob 2 is rotated counterclockwise, the smaller the opening distance of the overflow port 10, the smaller the vacuum flow at the working chamber 11, and the lower the vacuum degree at the second working port 12.

[0025] Reference Figure 1 and Figure 3, the outer wall of the connecting rod 5 is slidably connected to the inside of the valve body 1, and the bottom end of the second return spring 6 is fixedly connected to the outer wall of the connecting rod 5;

[0026] Specifically, when the connecting rod 5 is moved downward by the force of the second return spring 6 , the sealing gasket 7 is pressed downward.

[0027] Reference Figure 1 and Figure 3 A limit block chamber 16 is provided inside the valve body 1, and a top chamber 17 is provided inside the valve body 1;

[0028] Specifically, the top chamber 17 is connected to the vacuum detection observation port 20 and is not affected by the vacuum. The limit block chamber 16 is connected to the working airway 15, and the vacuum directly enters the limit block chamber 16 after passing through the working airway 15.

[0029] Reference Figure 1 and Figure 3 , the outer wall of the connecting rod 5 is fixedly connected with a top limit block 19, and the upper surface of the top limit block 19 is fixedly connected with an elastic diaphragm 18;

[0030] Specifically, when the pressure in the top chamber 17 is greater than the pressure in the limit block chamber 16 , the elastic diaphragm 18 will be deformed downward due to the air pressure.

[0031] Reference Figure 1 and Figure 3 , the outer wall of the top limit block 19 is slidably connected to the inner wall of the limit block chamber 16;

[0032] Specifically, when the pressure in the top chamber 17 is greater than the pressure in the limiting block chamber 16 , the top limiting block 19 is forced to slide on the inner wall of the limiting block chamber 16 .

[0033] Reference Figure 1 and Figure 3 , the upper surface of the connecting rod 5 is fixedly connected to the lower surface of the elastic diaphragm 18;

[0034] Specifically, when the elastic diaphragm 18 is deformed downward, it presses the top limit block 19 to drive the connecting rod 5 to move downward.

[0035] Reference Figure 1 and Figure 3 A vacuum detection observation port 20 is provided inside the valve body 1;

[0036] Specifically, the deformation of the elastic diaphragm 18 can be observed through the vacuum detection observation port 20 to confirm whether there is a vacuum at the second working port 12 .

[0037] Working principle: vacuum is introduced into the valve body 1 through the vacuum inlet 8. In the initial state, the adjusting knob 2 is at the bottom, the connecting rod 5 is pressed against the sealing gasket 7 by the force of the second return spring 6, the overflow port 10 is in a closed state, and there is no vacuum in the second working port 12. The adjusting knob 2 is rotated clockwise to compress the first return spring 4. At this time, the first return spring 4 will slide on the inner wall of the slide groove 3, so that the connecting rod 5 drives the sealing gasket 7 to move upward and open the overflow port 10. At this time, the vacuum at the vacuum inlet 8 enters the first working port 9 and then enters the working chamber 11 through the overflow port 10, so that a vacuum is generated at the second working port 12. The vacuum degree at the second working port 12 can be adjusted by the adjusting knob 2. The more circles the adjusting knob 2 is rotated clockwise, the larger the overflow port 12 will be. The larger the opening distance of 10 is, the greater the vacuum flow at the working chamber 11 is, and the higher the vacuum degree at the second working port 12 is. When the adjusting knob 2 is rotated counterclockwise, the vacuum of the working chamber 11 enters the limit block chamber 16 through the working airway 15, so that the pressure of the top chamber 17 is greater than the pressure of the limit block chamber 16, so that the elastic diaphragm 18 is deformed downward, pressing the top limit block 19 to drive the connecting rod 5 downward. At the same time, the connecting rod 5 is moved downward by the force of the second return spring 6, so that the sealing gasket 7 is pressed downward, the opening distance of the overflow port 10 is reduced, and the vacuum flow entering the working chamber 11 is reduced, thereby reducing the vacuum degree at the second working port 12. When the adjusting knob 2 is screwed to the bottom, the sealing gasket 7 is pressed downward to close the overflow port 10, and the first working port 12 is closed. The vacuum in port 9 cannot enter the working chamber 11, so that there is no vacuum at the second working port 12, thereby achieving the effect of fully closing or fully opening the regulating valve, and then effectively controlling the flow rate to keep it within the required range, which helps to maintain the normal operation of the system and prevent overload or excessive pressure. The vacuum in the working chamber 11 enters the limit block chamber 16 through the working airway 15, so that the pressure in the top chamber 17 is greater than the pressure in the limit block chamber 16, so that the elastic diaphragm 18 is deformed downward, pressing the top limit block 19 to drive the connecting rod 5 downward. At the same time, the connecting rod 5 is moved downward by the force of the second return spring 6. At this time, the deformation of the elastic diaphragm 18 can be observed through the vacuum detection observation port 20 to confirm the second Whether there is a vacuum at the working port 12, the effect of checking the vacuum can be achieved, and then the operating status and vacuum level of the system can be monitored, which is helpful to timely discover possible problems or abnormal conditions in the system so as to take corresponding measures to adjust or repair. The regulating valve can not only achieve the effect of completely closing or fully opening the regulating valve, but also effectively control the flow rate to keep it within the required range, which helps to maintain the normal operation of the system and prevent overload or excessive pressure. In addition, the effect of checking the vacuum can be achieved, and then the operating status and vacuum level of the system can be monitored, which is helpful to timely discover possible problems or abnormal conditions in the system so as to take corresponding measures to adjust or repair.

[0038] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A large flow vacuum regulating valve, comprising a valve body (1), characterized in that: The valve body (1) is internally threadedly connected to an adjusting knob (2), an outer wall of the adjusting knob (2) is provided with a slide groove (3), a first return spring (4) is fixedly connected to the inside of the adjusting knob (2), an outer wall of the first return spring (4) is slidably connected to the inner wall of the slide groove (3), a top end of the first return spring (4) is rotatably connected to a connecting block (14), an upper surface of the connecting block (14) is fixedly connected to a connecting rod (5), an outer wall of the connecting rod (5) is slidably connected to a second return spring (6), The top end of the second return spring (6) is fixedly connected to the inside of the valve body (1), the outer wall of the connecting rod (5) is fixedly connected with a sealing gasket (7), the inside of the valve body (1) is provided with a vacuum inlet (8), the inside of the valve body (1) is provided with a first working port (9), the inside of the valve body (1) is provided with an overflow port (10), the inside of the valve body (1) is provided with a working chamber (11), the inside of the valve body (1) is provided with a second working port (12), and the inside of the valve body (1) is provided with an adjusting component.

2. A large flow vacuum regulating valve according to claim 1, characterized in that: The regulating assembly comprises a valve ball (13), the outer wall of the valve ball (13) is slidably connected to the inside of the valve body (1), the outer wall of the valve ball (13) is fixedly connected to the inside of the regulating knob (2), and a working air passage (15) is provided inside the valve body (1).

3. A large flow vacuum regulating valve according to claim 1, characterized in that: The outer wall of the connecting rod (5) is slidably connected to the inside of the valve body (1), and the bottom end of the second return spring (6) is fixedly connected to the outer wall of the connecting rod (5).

4. A large flow vacuum regulating valve according to claim 1, characterized in that: A limit block chamber (16) is provided inside the valve body (1), and a top chamber (17) is provided inside the valve body (1).

5. A large flow vacuum regulating valve according to claim 3, characterized in that: The outer wall of the connecting rod (5) is fixedly connected to a top limit block (19), and the upper surface of the top limit block (19) is fixedly connected to an elastic diaphragm (18).

6. A large flow vacuum regulating valve according to claim 5, characterized in that: The outer wall of the top limit block (19) is slidably connected to the inner wall of the limit block chamber (16).

7. A large flow vacuum regulating valve according to claim 3, characterized in that: The upper surface of the connecting rod (5) is fixedly connected to the lower surface of the elastic diaphragm (18).

8. A large flow vacuum regulating valve according to claim 2, characterized in that: A vacuum detection observation port (20) is provided inside the valve body (1).

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