Purge valve with air damper function

Abstract

The application relates to a kind of blow valve with air station function, the output signal of vacuum pump is monitored by sensor and signal is transmitted to electric control switch, electric control switch receives signal control driving motor work, driving motor drives valve rod movement, so that the valve rod sleeve of the other end of valve rod moves, valve rod sleeve promotes valve element to move upwards, so that second chamber is communicated with exhaust port, when driving motor does not work, valve element is located in original position, at this time, first chamber is communicated with exhaust port, because first air inlet is communicated with first chamber, second air inlet is communicated with second chamber, so when the chamber communicated is different, medium into vacuum pump is also different, to control the medium into vacuum pump, first chamber and second chamber can avoid water vapor condensation in valve body, improve the efficiency and life of vacuum pump.

Description

Technical Field

[0001] This application relates to the field of purge valve technology, and in particular to a purge valve that also functions as a gas ballast. Background Technology

[0002] A vacuum pump is a device used to generate, increase, and maintain a vacuum. It is widely used in chemical, pharmaceutical, food, metallurgical, and electronics industries. During operation, vacuum pumps typically need to extract different types and states of gases or vapors, such as permanent gases, condensable gases, explosive gases, and toxic gases. These gases or vapors have a significant impact on the performance and lifespan of the vacuum pump; therefore, measures need to be taken to protect the vacuum pump and improve its efficiency and reliability.

[0003] A common practice is to introduce a certain amount of external gas (usually air) into the vacuum pump to prevent the pumped vapor from condensing inside the pump; this effect is called gas ballast. Gas ballast can improve the vapor tolerance and pumping speed of the vacuum pump, while reducing power consumption and maintenance costs. The effectiveness of gas ballast depends on the amount and pressure of air, as well as the type and partial pressure of the pumped vapor.

[0004] Another common measure is to install a component at the inlet or outlet of the vacuum pump to control the entry and exit of the purge medium; this component is called a purge valve. The purge valve can be adjusted according to different operating conditions and requirements to achieve cleaning and purging of process pipelines or the inside of the vacuum pump.

[0005] Currently, there are various types and brands of purge valves on the market. These purge valves differ in structure, performance, and control methods. However, existing purge valves are difficult to combine with gas ballast function and cannot automatically adjust the amount and pressure of the purge medium according to the type and state of the pumped medium, resulting in inconvenient operation. Summary of the Invention

[0006] Therefore, it is necessary to provide a purge valve that also has a gas ballast function to address the problems that existing purge valves cannot perform gas ballast function and cannot automatically adjust the amount and pressure of the purge medium according to the type and state of the pumped medium, resulting in inconvenience in operation.

[0007] This application provides a purge valve that also functions as a gas ballast valve, comprising:

[0008] The valve body includes an upper valve body, a middle valve body, and a lower valve body. The bottom surface of the upper valve body is fixedly connected to the top surface of the middle valve body, and the bottom surface of the middle valve body is fixedly connected to the top surface of the lower valve body.

[0009] Valve stem, which is fixedly connected inside the valve body;

[0010] A valve stem sleeve, which is fixedly connected to one end of the valve stem;

[0011] Valve core, wherein the valve core is disposed in the middle valve body;

[0012] A sensor, which is fixedly connected to the outlet of the vacuum pump;

[0013] An electric control switch is fixedly connected to one end of the valve stem, and the sensor is electrically connected to the electric control switch.

[0014] Furthermore, the valve core includes an inlet, an outlet, a first tilt angle, and a second tilt angle. One end of the valve core has an inlet, and the other end of the valve core has an outlet. One end of the valve stem passes through the valve core through the inlet and the outlet and is fixedly connected to the valve stem sleeve. The first tilt angle is located in the middle of the inner wall of the valve core, and the second tilt angle is located at the bottom of the inner wall of the valve core.

[0015] Furthermore, the valve stem sleeve includes a connecting part, a base part, and a third tilt angle. One end of the connecting part is fixedly connected to one end of the valve stem, and the other end of the connecting part is fixedly connected to the top surface of the base part. The bottom surface of the base part is provided with a third tilt angle.

[0016] Furthermore, the upper valve body has a first air inlet, the middle valve body has a second air inlet, and the lower valve body has an exhaust port, which is connected to the vacuum pump.

[0017] Furthermore, the upper valve body and the middle valve body are fixedly connected by bolts, and the middle valve body and the lower valve body are fixedly connected by bolts.

[0018] Furthermore, the upper valve body has a first chamber, the middle valve body has a second chamber, and the valve core is disposed between the first chamber and the second chamber.

[0019] Furthermore, the other end of the valve stem passes through the top surface of the upper valve body and is fixedly connected to the drive motor.

[0020] Furthermore, the valve stem sleeve is made of PC plastic.

[0021] Furthermore, a gasket is fixedly connected between the bottom surface of the upper valve body and the top surface of the middle valve body, and a gasket is fixedly connected between the bottom surface of the middle valve body and the top surface of the lower valve body.

[0022] Furthermore, a limiting plate is fixedly connected to the upper valve body, and the limiting plate is symmetrically distributed about the central axis of the upper valve body.

[0023] This application relates to a purge valve that also functions as a gas ballast. A sensor monitors the output signal of the vacuum pump and transmits the signal to an electronic control switch. The electronic control switch receives the signal and controls a drive motor to operate. The drive motor moves the valve stem, causing the valve stem sleeve at the other end of the valve stem to move. The valve stem sleeve pushes the valve core upward, connecting the second chamber to the exhaust port. When the drive motor is not operating, the valve core is in its original position, and the first chamber is connected to the exhaust port. Since the first air inlet is connected to the first chamber and the second air inlet is connected to the second chamber, the medium entering the vacuum pump differs depending on which chamber is connected. This controls the medium entering the vacuum pump. The first and second chambers prevent water vapor from condensing inside the valve body, improving the efficiency and lifespan of the vacuum pump. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a purge valve that also functions as a gas ballast, provided as an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the sensor electrical connection of a purge valve that also functions as a gas ballast, provided in an embodiment of this application.

[0026] Figure 3 A perspective view of a purge valve with gas ballast function provided in an embodiment of this application.

[0027] Figure 4 A cross-sectional view of a purge valve with gas ballast function provided in an embodiment of this application.

[0028] Figure 5 A cross-sectional view of the valve core of a purge valve that also functions as a gas ballast, provided in an embodiment of this application.

[0029] Figure 6 A perspective view of the valve stem sleeve of a purge valve that also functions as a gas ballast, provided in an embodiment of this application.

[0030] Figure label:

[0031] 100. Valve body; 101. Upper valve body; 102. Middle valve body; 103. Lower valve body; 104. Valve stem;

[0032] 105. Valve stem sleeve; 105a. Connecting part; 105b. Chassis part; 105c. Third tilt angle;

[0033] 106, Valve core; 106a, Inlet; 106b, Outlet; 106c, First tilt angle; 106d, Second tilt angle;

[0034] 107. Sensor; 108. Electronic switch; 109. First air inlet; 110. Second air inlet;

[0035] 111. Exhaust port; 112. Bolt; 113. Gasket; 114. First chamber; 115. Second chamber; 116. Drive motor; 117. Limiting plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] This application provides a purge valve that also functions as a gas ballast. It should be noted that the purge valve with gas ballast functionality provided in this application can be applied to any type of vacuum pump.

[0038] like Figure 1 and Figure 2 As shown, in one embodiment of this application, the purge valve with gas ballast function includes a valve body 100, a valve stem 104, a valve stem sleeve 105, a valve core 106, a sensor 107, and an electronic control switch 108.

[0039] The valve body 100 includes an upper valve body 101, a middle valve body 102, and a lower valve body 103. The bottom surface of the upper valve body 101 is fixedly connected to the top surface of the middle valve body 102, and the bottom surface of the middle valve body 102 is fixedly connected to the top surface of the lower valve body 103. The valve stem 104 is fixedly connected inside the valve body 100. The valve stem sleeve 105 is fixedly connected to one end of the valve stem 104. The valve core 106 is disposed inside the middle valve body 102. The sensor 107 is fixedly connected to the outlet 106b of the vacuum pump. The electric control switch 108 is fixedly connected to one end of the valve stem 104, and the sensor 107 is electrically connected to the electric control switch 108.

[0040] Specifically, a vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. In simpler terms, a vacuum pump is a device that uses various methods to improve, generate, and maintain a vacuum in a closed space.

[0041] Based on their working principle, vacuum pumps can be broadly classified into two types: gas trapping pumps and gas transfer pumps. They are widely used in industries such as metallurgy, chemical engineering, food processing, and electronic coating.

[0042] In this embodiment, the output signal of the vacuum pump is monitored by sensor 107 and transmitted to the electronic control switch 108. The electronic control switch 108 receives the signal and controls the drive motor 116 to work. The drive motor 116 drives the valve stem 104 to move, thereby causing the valve stem sleeve 105 at the other end of the valve stem 104 to move. The valve stem sleeve 105 pushes the valve core 106 to move upward, so that the second chamber 115 is connected to the exhaust port 111. When the drive motor 116 is not working, the valve core 106 is in its original position. At this time, the first chamber 114 is connected to the exhaust port 111. Since the first air inlet 109 is connected to the first chamber 114 and the second air inlet 110 is connected to the second chamber 115, the medium entering the vacuum pump is different when the connected chambers are different. This controls the medium entering the vacuum pump. The first chamber 114 and the second chamber 115 can prevent water vapor from condensing in the valve body 100, thereby improving the efficiency and life of the vacuum pump.

[0043] like Figure 5 As shown, in one embodiment of this application, the valve core 106 includes an inlet 106a, an outlet 106b, a first tilt angle 106c, and a second tilt angle 106d. One end of the valve core 106 has an inlet 106a, and the other end of the valve core 106 has an outlet 106b. One end of the valve stem 104 passes through the valve core 106 via the inlet 106a and the outlet 106b and is fixedly connected to the valve stem sleeve 105. The first tilt angle 106c is located in the middle of the inner wall of the valve core 106, and the second tilt angle 106d is located at the bottom of the inner wall of the valve core 106.

[0044] Specifically, the first tilt angle 106c can be 5° and the second tilt angle 106d can be 5°.

[0045] In this embodiment, when the valve stem 104 moves, the valve stem sleeve 105 pushes the valve core 106 to move, thereby allowing different media to enter the purge valve, thus controlling the media entering the vacuum pump.

[0046] When the valve stem 104 moves upward, the valve stem sleeve 105 also moves upward under the action of the valve stem 104, thereby causing the valve stem sleeve 105 to push the valve core 106 upward, so that the second chamber 115 is connected to the exhaust port 111. At this time, the medium in the second air inlet 110 can enter the vacuum pump through the second chamber 115 and the exhaust port 111.

[0047] When the valve stem moves downward, the valve core 106 is in its original position, and the valve stem sleeve 105 moves downward, creating a gap between the valve stem sleeve 105 and the valve core 106, thereby connecting the first chamber 114 with the exhaust port 111. At this time, the medium in the first air inlet 109 can enter the vacuum pump through the first chamber 114 and the exhaust port 111.

[0048] like Figure 6 As shown, in one embodiment of this application, the valve stem sleeve 105 includes a connecting part 105a, a base part 105b, and a third tilt angle 105c. One end of the connecting part 105a is fixedly connected to one end of the valve stem 104, and the other end of the connecting part 105a is fixedly connected to the top surface of the base part 105b. The bottom surface of the base part 105b is provided with a third tilt angle 105c.

[0049] Specifically, the connecting part 105a is connected to one end of the valve stem 104 by a thread to ensure the airtightness of the device.

[0050] In this embodiment, the first tilt angle 106c makes the valve stem 104 more tightly connected to the valve core 106, forming a complete sealed space and preventing the medium from leaking out from the connection between the valve core 106 and the valve stem 104.

[0051] By using the second tilt angle 106d and the third tilt angle 105c, the connection between the valve stem sleeve 105 and the valve core 106 becomes tighter, forming a complete sealed space and improving the airtightness of the device.

[0052] like Figure 3 As shown, in one embodiment of this application, the upper valve body 101 has a first air inlet 109, the middle valve body 102 has a second air inlet 110, and the lower valve body 103 has an exhaust port 111, which is connected to a vacuum pump.

[0053] In this embodiment, the first air inlet 109 is connected to the first chamber 114, and the second air inlet 110 is connected to the second chamber 115. The first chamber 114 or the second chamber 115 is switched by the valve core 106, thereby switching the first air inlet 109 or the second air inlet 110, thereby controlling the medium entering the vacuum pump. The medium enters the vacuum pump through the exhaust port 111.

[0054] like Figure 3 As shown, in one embodiment of this application, the upper valve body 101 and the middle valve body 102 are fixedly connected by bolts 112, and the middle valve body 102 and the lower valve body 103 are fixedly connected by bolts 112.

[0055] Specifically, there are multiple bolts 112, which are evenly spaced around the valve body 100.

[0056] In this embodiment, the bottom surface of the upper valve body 101 and the top surface of the middle valve body 102 are connected together by bolts 112, and the bottom surface of the middle valve body 102 and the top surface of the lower valve body 103 are connected together, making the installation and disassembly of the valve body 100 more convenient.

[0057] like Figure 1 As shown, in one embodiment of this application, the upper valve body 101 has a first chamber 114, the middle valve body 102 has a second chamber 115, and the valve core 106 is disposed between the first chamber 114 and the second chamber 115.

[0058] Specifically, the inner walls of the first chamber 114 and the second chamber 115 are both smooth and convex, which can prevent water vapor from condensing inside the valve body 100.

[0059] In this embodiment, the opening and closing of different air inlets are adjusted by the first chamber 114 and the second chamber 115 in conjunction with the valve core 106, thereby controlling the medium entering the vacuum pump.

[0060] like Figure 2 As shown, in one embodiment of this application, one end of the valve stem 104 is fixedly connected to the drive motor 116.

[0061] Specifically, the drive motor 116 is electrically connected to the electronic control switch 108.

[0062] In this embodiment, the switch of the drive motor 116 is controlled by the electronic switch 108. When the electronic switch 108 is turned on, the drive motor 116 starts to work and drives the valve stem 103100 to move.

[0063] like Figure 1 As shown, in one embodiment of this application, the valve stem sleeve 105 is made of PC plastic.

[0064] Specifically, PC plastic is a high molecular polymer containing carbonate groups in its molecular chain. Based on the structure of the ester groups, it can be divided into various types such as aliphatic, aromatic, and aliphatic-aromatic. Among them, aliphatic and aliphatic-aromatic polycarbonates have lower mechanical properties, which limits their application in engineering plastics.

[0065] Only aromatic polycarbonate has achieved industrial-scale production. Due to the unique structure of polycarbonate, it has become the fastest-growing general-purpose engineering plastic among the five major engineering plastics.

[0066] In this embodiment, by selecting PC plastic as the material of the valve stem sleeve 105, the viscosity of the valve stem sleeve 105 is increased while ensuring the hardness of the valve stem sleeve 105, thereby strengthening the tightness of the connection between the valve stem sleeve 105 and the valve core 106 and improving the airtightness of the device.

[0067] like Figure 4 As shown, in one embodiment of this application, a gasket 113 is fixedly connected between the bottom surface of the upper valve body 101 and the top surface of the middle valve body 102, and a gasket 113 is fixedly connected between the bottom surface of the middle valve body 102 and the top surface of the lower valve body 103.

[0068] Specifically, the gasket 113 can be annular in shape.

[0069] In this embodiment, the gasket 113 absorbs the vibration of the valve body 100 caused by the movement of the valve stem 104, thereby improving the stability of the valve body 100.

[0070] like Figure 1 As shown, in one embodiment of this application, a limiting piece 117 is fixedly connected inside the upper valve body 101, and the limiting piece 117 is symmetrically distributed about the central axis of the upper valve body 101.

[0071] In this embodiment, the position of the valve stem 104 is limited by the limiting piece 117 during movement to prevent large deviations in the position of the valve stem 104. In addition, the limiting piece 117 can also work with the valve stem 104 to seal the valve body 101, thereby improving the airtightness of the device.

[0072] The technical features of the above embodiments can be combined arbitrarily, and the execution order of the method steps is not restricted. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A purge valve with gas ballast function, used in a vacuum pump, characterized in that, The purge valve that also functions as a gas ballast includes: The valve body includes an upper valve body, a middle valve body, and a lower valve body. The bottom surface of the upper valve body is fixedly connected to the top surface of the middle valve body, and the bottom surface of the middle valve body is fixedly connected to the top surface of the lower valve body. Valve stem, which is fixedly connected inside the valve body; A valve stem sleeve, which is fixedly connected to one end of the valve stem; Valve core, wherein the valve core is disposed in the middle valve body; A sensor, which is fixedly connected to the outlet of the vacuum pump; An electronically controlled switch is fixedly connected to one end of a valve stem, and a sensor is electrically connected to the electronically controlled switch. The valve core includes an inlet, an outlet, a first tilt angle, and a second tilt angle. One end of the valve core has an inlet, and the other end has an outlet. One end of the valve stem passes through the inlet and outlet and is fixedly connected to a valve stem sleeve. The first tilt angle is located in the middle of the inner wall of the valve core, and the second tilt angle is located at the bottom of the inner wall of the valve core. The upper valve body has a first air inlet, the middle valve body has a second air inlet, and the lower valve body has an exhaust port, which is connected to a vacuum pump. The upper valve body has a first chamber, the middle valve body has a second chamber, and the valve core is located between the first and second chambers. When the valve stem moves upward, the valve stem sleeve also moves upward under the influence of the valve stem, thereby pushing the valve core upward and connecting the second chamber to the exhaust port. At this time, the medium in the second air inlet can enter the vacuum pump through the second chamber and the exhaust port. When the valve stem moves downward, the valve core remains in its original position, and the valve stem sleeve moves downward, creating a gap between the valve stem sleeve and the valve core. This allows the first chamber to connect with the exhaust port, and the medium in the first inlet can then enter the vacuum pump through the first chamber and the exhaust port.

2. A purge valve with gas ballast function according to claim 1, characterized in that, The valve stem sleeve includes a connecting part, a base part, and a third tilt angle. One end of the connecting part is fixedly connected to one end of the valve stem, and the other end of the connecting part is fixedly connected to the top surface of the base part. The bottom surface of the base part is provided with a third tilt angle.

3. A purge valve with gas ballast function according to claim 1, characterized in that, The upper valve body and the middle valve body are fixedly connected by bolts, and the middle valve body and the lower valve body are fixedly connected by bolts.

4. A purge valve with gas ballast function according to claim 1, characterized in that, The other end of the valve stem passes through the top surface of the upper valve body and is fixedly connected to the drive motor.

5. A purge valve with gas ballast function according to claim 1, characterized in that, The valve stem sleeve is made of PC plastic.

6. A purge valve with gas ballast function according to claim 1, characterized in that, A gasket is fixedly connected between the bottom surface of the upper valve body and the top surface of the middle valve body, and a gasket is fixedly connected between the bottom surface of the middle valve body and the top surface of the lower valve body.

7. A purge valve with gas ballast function according to claim 1, characterized in that, The upper valve body is fixedly connected to a limiting plate, which is symmetrically distributed about the central axis of the upper valve body.

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