Two-position two-way direct-acting vacuum switching valve

Abstract

The utility model relates to the technical field of vacuum, and discloses a two-position two-way direct-acting type vacuum switching valve which comprises a box body, a top cover is arranged on the top of the box body, an electromagnetic valve body is installed on the top of the top cover, an upper piston is fixedly connected to the bottom of the top cover, a connecting rod assembly is installed in one end of the upper piston, and the other end of the upper piston is fixedly connected with the electromagnetic valve body. And a lower piston is installed outside one end of the connecting rod assembly, the bottom of the lower piston is fixedly connected to the bottom of the inner wall of the box body, a pressure relief opening is formed in one side of the interior of the box body, and a working opening and a vacuum inlet are formed in the other side of the interior of the box body. According to the utility model, when vacuum needs to be destroyed, the electromagnetic valve is opened, so that the vacuum at the vacuum inlet enters the electromagnetic valve through the vacuum air passage and then enters the upper chamber through the electromagnetic valve air passage, the connecting rod assembly is lifted to connect the pressure relief chamber and the working chamber, and the air at the pressure relief port enters the working chamber through the pressure relief chamber and then destroys the vacuum at the working port; and the effect of breaking the vacuum more quickly is achieved.

Description

Technical Field

[0001] The utility model relates to the field of vacuum technology, in particular to a two-position two-way direct-acting vacuum switching valve. Background Art

[0002] The vacuum control valve is used to control the gas flow, pressure and opening and closing of the inlet and outlet in the vacuum system. In applications that require precise control of the vacuum degree, the use of a vacuum control valve can effectively adjust the system's air pressure and gas flow to ensure stable operation of the system. In the vacuum system, the valve plays an important sealing role. The vacuum control valve is reasonably designed and has good sealing performance. It can effectively prevent gas leakage and ensure that the system maintains the required vacuum degree. The vacuum control valve can adapt to different working pressure and temperature conditions. In a high vacuum environment or high temperature conditions, the vacuum control valve can operate stably and maintain good performance, but the current vacuum control valve has the problem of too slow vacuum destruction speed, resulting in excessive pressure inside the suction cup and slow reaction speed, and low efficiency. Utility Model Content

[0003] In order to make up for the above shortcomings, the utility model provides a two-position two-way direct-acting vacuum switching valve, which aims to improve the problem that the vacuum breaking speed is too slow, resulting in excessive pressure inside the suction cup and slow reaction speed, and low efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-position two-way direct-acting vacuum switching valve, comprising a box body, a top cover is provided on the top of the box body, a solenoid valve body is installed on the top of the top cover, an upper piston is fixedly connected to the bottom of the top cover, a connecting rod assembly is installed inside one end of the upper piston, a lower piston is installed outside one end of the connecting rod assembly, the bottom of the lower piston is fixedly connected to the bottom of the inner wall of the box body, a pressure relief port is provided on one side of the interior of the box body, a working port and a vacuum inlet are respectively provided on the other side of the interior of the box body, an upper chamber is provided inside the top cover, a vacuum air duct is provided at one end of the interior of the box body and the top cover, a solenoid valve air duct is provided inside the top cover, and one end of the solenoid valve air duct is externally provided inside the upper chamber.

[0005] Preferably, a pressure relief chamber and a vacuum chamber are respectively provided inside the box body, the outside of the upper piston is arranged inside the pressure relief chamber, and the outside of the lower piston is arranged inside the vacuum chamber.

[0006] Preferably, the pressure relief chamber and the pressure relief port are communicated with each other.

[0007] Preferably, a working chamber is provided inside the box body, and two ends of the working chamber are communicated with the pressure relief chamber and the vacuum chamber.

[0008] Preferably, the working chamber and the working port are communicated with each other.

[0009] Preferably, one end of the vacuum air passage is disposed inside the outside of the output end of the solenoid valve body.

[0010] Preferably, one end of the vacuum air passage is opened inside the vacuum inlet.

[0011] Preferably, an elastic diaphragm is provided between the box body and the top cover.

[0012] The utility model has the following beneficial effects:

[0013] 1. In the utility model, when it is necessary to break the vacuum, the solenoid valve body is opened so that the vacuum at the vacuum inlet enters the solenoid valve body through the vacuum air passage, and then enters the upper chamber through the solenoid valve air passage, so that the connecting rod assembly is lifted, and when the connecting rod assembly is lifted, the lower piston is closed, and when the lower piston is closed, the connection between the vacuum chamber and the working chamber is disconnected. At this time, the upper piston is opened to connect the pressure relief chamber and the working chamber, and the air at the pressure relief port enters the working chamber through the pressure relief chamber to break the vacuum at the working port, thereby achieving a faster effect of breaking the vacuum.

[0014] 2. In the utility model, when it is necessary to generate a vacuum again, the solenoid valve body is closed. When the solenoid valve body is closed, the vacuum in the upper chamber will pass through the solenoid valve airway into the interior of the solenoid valve and then be discharged. At this time, the connecting rod assembly drives the elastic diaphragm to deform and press down due to its own weight, so that the upper piston is closed. When the upper piston is closed, the lower piston opens and returns to the normally open state, achieving a faster response speed. The fast response speed makes the valve react faster, thereby achieving the effect of improving efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the internal structure of a two-position two-way direct-acting vacuum switching valve in a normally closed state;

[0016] Figure 2 This is a schematic diagram of the internal structure of a two-position two-way direct-acting vacuum switching valve in a normally closed state from the front;

[0017] Figure 3 This is a schematic diagram of the internal structure of a two-position two-way direct-acting vacuum switching valve in a normally open state;

[0018] Figure 4 This is a schematic diagram of the internal structure of the two-position two-way direct-acting vacuum switching valve in the normally open state.

[0019] Legend:

[0020] 1. Pressure relief port; 2. Working port; 3. Vacuum inlet; 4. Pressure relief chamber; 5. Working chamber; 6. Vacuum chamber; 7. Vacuum airway; 8. Solenoid valve airway; 9. Upper chamber; 10. Elastic diaphragm; 11. Solenoid valve body; 12. Upper piston; 13. Lower piston; 14. Connecting rod assembly; 15. Box body; 16. Top cover. DETAILED DESCRIPTION

[0021] 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.

[0022] Reference Figure 1-Figure 3 The utility model provides an embodiment: a two-position two-way direct-acting vacuum switching valve, comprising a box body 15, a top cover 16 is provided on the top of the box body 15, a solenoid valve body 11 is installed on the top of the top cover 16, an upper piston 12 is fixedly connected to the bottom of the top cover 16, a connecting rod assembly 14 is installed inside one end of the upper piston 12, a lower piston 13 is installed outside one end of the connecting rod assembly 14, the bottom of the lower piston 13 is fixedly connected to the bottom of the inner wall of the box body 15, a pressure relief port 1 is opened on one side of the box body 15, a working port 2 and a vacuum inlet 3 are opened on the other side of the box body 15, and the top cover 1 is fixedly connected to the bottom of the inner wall of the box body 15. 6 is provided with an upper chamber 9, a vacuum air passage 7 is provided at one end of the box body 15 and the top cover 16, a solenoid valve air passage 8 is provided inside the top cover 16, and one end of the solenoid valve air passage 8 is provided outside the upper chamber 9; vacuum is input into the vacuum inlet 3, the vacuum is input into the solenoid valve body 11 through the vacuum air passage 7, the vacuum is transported to the solenoid valve air passage 8 through the solenoid valve body 11, the vacuum is transported to the upper chamber 9 through the solenoid valve air passage 8, the connecting rod assembly 14 is lifted up by the vacuum inside the upper chamber 9, and the lower piston 13 is closed by lifting the connecting rod assembly 14.

[0023] Reference Figure 1 A pressure relief chamber 4 and a vacuum chamber 6 are respectively provided inside the box body 15, the outer portion of the upper piston 12 is arranged inside the pressure relief chamber 4, and the outer portion of the lower piston 13 is arranged inside the vacuum chamber 6; when the outer portion of the upper piston 12 is arranged inside the pressure relief chamber 4, when the pressure in the pressure relief chamber 4 changes, the upper piston 12 will move accordingly to control the opening and closing state of the valve. Similarly, when the outer portion of the lower piston 13 is arranged inside the vacuum chamber 6, the state of the valve can be controlled according to the pressure change of the vacuum chamber 6. Such a design ensures stable operation and reliable sealing of the valve under different pressure conditions.

[0024] The pressure relief chamber 4 is connected to the pressure relief port 1 . The pressure relief chamber 4 is connected to the pressure relief port 1 , so that the vacuum inside the pressure relief port 1 can be transported to the inside of the working chamber 5 through the pressure relief chamber 4 .

[0025] A working chamber 5 is provided inside the box body 15, and both ends of the working chamber 5 are connected to the pressure relief chamber 4 and the vacuum chamber 6. The valve can be switched between different working states by connecting the working chamber 5 to the pressure relief chamber 4 and the vacuum chamber 6. By changing the connection mode, the opening and closing state of the valve can be controlled to realize the on-off control of the fluid or gas.

[0026] Reference Figure 3 , Figure 4 , the working chamber 5 and the working port 2 are interconnected; through the interconnection between the working chamber 5 and the working port 2, the vacuum inside the working chamber 5 can be transported to the inside of the working port 2.

[0027] Reference Figure 1 One end of the vacuum air passage 7 is arranged inside the outside of the output end of the solenoid valve body 11; by connecting the vacuum air passage 7 with the solenoid valve body 11, the effect of providing vacuum to the inside of the solenoid valve body 11 can be achieved through the vacuum air passage 7.

[0028] Reference Figure 1 , Figure 2 One end of the vacuum air passage 7 is opened inside the vacuum inlet 3; in the normally open state, the vacuum put into the vacuum inlet 3 is transported to the inside of the solenoid valve body 11 through the vacuum air passage 7.

[0029] Reference Figure 1 An elastic diaphragm 10 is provided between the box body 15 and the top cover 16; the elastic diaphragm 10 provided between the box body 15 and the top cover 16 can effectively seal the space between the valve body and the valve seat to prevent fluid or gas leakage and ensure the sealing performance of the system.

[0030] Working principle: When the device needs to be used and opened, a vacuum is introduced into the vacuum inlet 3. Due to the deadweight of the connecting rod assembly 14, the elastic diaphragm 10 is deformed and pressed down, the upper piston 12 is closed, the pressure relief chamber 4 and the working chamber 5 are disconnected, the lower piston 13 is opened, the working chamber 5 and the vacuum chamber 6 are connected, and the vacuum at the vacuum inlet 3 enters the working chamber 5 through the vacuum chamber 6 to generate a vacuum at the working port 2. When the vacuum is broken, the solenoid valve body 11 needs to be opened, and the vacuum at the vacuum inlet 3 enters the solenoid valve body 11 through the vacuum air passage 7, and then the vacuum at the vacuum inlet 3 is released by the solenoid valve body 11. The solenoid valve airway 8 enters the upper chamber 9, which lifts the connecting rod assembly 14, closes the lower piston 13, disconnects the vacuum chamber 6 and the working chamber 5, opens the upper piston 12, connects the pressure relief chamber 4 and the working chamber 5, and the air at the pressure relief port 1 enters the working chamber 5 through the pressure relief chamber 4 to destroy the vacuum at the working port 2. If the vacuum needs to be generated again, close the solenoid valve body 11, and the vacuum in the upper chamber 9 enters the solenoid valve body 11 through the solenoid valve airway 8 and is discharged. The connecting rod assembly 14 drives the elastic diaphragm 10 to deform and press down due to its own weight, so that the upper piston 12 When the vacuum inlet 3 is closed, the lower piston 13 opens and returns to the normally open state. When it needs to be closed, when a vacuum is introduced into the vacuum inlet 3, due to the deadweight of the connecting rod assembly 14, the elastic diaphragm 10 is deformed and pressed down, the upper piston 12 is closed, the vacuum chamber 6 and the working chamber 5 are disconnected, the lower piston 13 opens, the working chamber 5 and the pressure relief chamber 4 are connected, there is no vacuum at the working port 2, when a vacuum is generated at the working port 2, the solenoid valve body 11 needs to be opened, the vacuum at the vacuum inlet 3 enters the solenoid valve body 11 through the vacuum air passage 7, and then enters the upper chamber 9 through the solenoid valve air passage 8, so that the connecting rod The assembly 14 is lifted up to close the lower piston 13, disconnecting the pressure relief chamber 4 and the working chamber 5, and the upper piston 12 is opened to connect the vacuum chamber 6 and the working chamber 5. The vacuum at the vacuum inlet 3 enters the working chamber 5 through the vacuum chamber 6 to generate a vacuum at the working port 2. If the vacuum needs to be destroyed, the solenoid valve body 11 is closed, and the vacuum in the upper chamber 9 enters the solenoid valve body 11 through the solenoid valve airway 8 and is then discharged. The connecting rod assembly 14 drives the elastic diaphragm 10 to deform and press downward due to its own weight, so that the upper piston 12 is closed and the lower piston 13 is opened, restoring the normally closed state.

[0031] 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 two-position two-way direct-acting vacuum switching valve, comprising a box (15), characterized in that: A top cover (16) is provided on the top of the box body (15), a solenoid valve body (11) is installed on the top of the top cover (16), an upper piston (12) is fixedly connected to the bottom of the top cover (16), a connecting rod assembly (14) is installed inside one end of the upper piston (12), a lower piston (13) is installed outside one end of the connecting rod assembly (14), the bottom of the lower piston (13) is fixedly connected to the bottom of the inner wall of the box body (15), a pressure relief port (1) is provided on one side of the box body (15), a working port (2) and a vacuum inlet (3) are respectively provided on the other side of the box body (15), an upper chamber (9) is provided inside the top cover (16), a vacuum air passage (7) is provided at one end of the box body (15) and the top cover (16), a solenoid valve air passage (8) is provided inside the top cover (16), and one end of the solenoid valve air passage (8) is externally arranged inside the upper chamber (9).

2. A two-position two-way direct-acting vacuum switching valve according to claim 1, characterized in that: The box body (15) is provided with a pressure relief chamber (4) and a vacuum chamber (6) respectively. The exterior of the upper piston (12) is arranged inside the pressure relief chamber (4), and the exterior of the lower piston (13) is arranged inside the vacuum chamber (6).

3. A two-position two-way direct-acting vacuum switching valve according to claim 2, characterized in that: The pressure relief chamber (4) and the pressure relief port (1) are in communication with each other.

4. The two-position two-way direct-acting vacuum switching valve according to claim 1, characterized in that: A working chamber (5) is provided inside the box body (15), and two ends of the working chamber (5) are connected to the pressure relief chamber (4) and the vacuum chamber (6).

5. A two-position two-way direct-acting vacuum switching valve according to claim 4, characterized in that: The working chamber (5) and the working port (2) are communicated with each other.

6. The two-position two-way direct-acting vacuum switching valve according to claim 1, characterized in that: One end of the vacuum air passage (7) is internally arranged outside the output end of the solenoid valve body (11).

7. The two-position two-way direct-acting vacuum switching valve according to claim 1, characterized in that: One end of the vacuum air passage (7) is opened inside the vacuum inlet (3).

8. The two-position two-way direct-acting vacuum switching valve according to claim 1, characterized in that: An elastic diaphragm (10) is provided between the box body (15) and the top cover (16).

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