A vacuum pumping system and a vacuum suction device

Abstract

The embodiment of the utility model provides a kind of vacuum pump system and vacuum suction equipment, it is related to vacuum pump technical field.The vacuum pump, temperature detection device, pressure vessel and control air valve, vacuum pump includes pump body, and pump body is connected with inlet and exhaust pipeline, and temperature detection device is set in pump body;Pressure vessel is connected with pump body by inlet and exhaust pipeline;Control air valve is set on the inlet and exhaust pipeline between vacuum pump and pressure vessel;Control air valve has opening state and closed state, in the case where temperature detection device detects that pump body temperature reaches first temperature setting value, control air valve is switched from closed to opening state;After control air valve switches to opening state, when temperature detection device detects that pump body temperature drops to second temperature setting value, control air valve is switched from opening state to closed state.Through setting temperature sensor, the temperature of vacuum pump can be monitored in real time, in the case where vacuum pump temperature value is too high, open control air valve, carry out high temperature protection to vacuum pump.

Description

Technical Field

[0001] This utility model relates to the field of vacuum pump technology, and more specifically, to a vacuum pump system and a vacuum suction device. Background Technology

[0002] A vacuum pump is a device used to extract gas from a container or system to create a vacuum environment. Vacuum pumps create a low-pressure environment through mechanical or physical means. Utilizing gas pressure differences and flow characteristics, gas is drawn into the pump from a low-pressure area, compressed, and then discharged, thus forming a vacuum. Vacuum pumps are widely used in industries such as metallurgy, chemicals, food processing, and electronic coating.

[0003] However, most vacuum pumps use oil for lubrication, cooling, and sealing to prevent leaks. When the temperature of a vacuum pump is too high, it will not only affect the normal operation of the vacuum pump, but may also pose a danger such as explosion. Utility Model Content

[0004] This invention provides a vacuum pump system and vacuum suction equipment, which can provide high-temperature protection for the vacuum pump.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] An embodiment of this utility model provides a vacuum pump system, which includes:

[0007] A vacuum pump, the vacuum pump including a pump body, the pump body being connected to an inlet and outlet pipe;

[0008] A temperature detection device is disposed in the pump body;

[0009] A pressure vessel, wherein the pressure vessel is connected to the pump body via an inlet and outlet pipe;

[0010] A control valve is provided on the inlet and outlet pipe between the vacuum pump and the pressure vessel. The control valve has an open state and a closed state. When the temperature detection device detects that the pump body temperature has reached a first temperature set value, the control valve switches from the closed state to the open state. After the control valve switches to the open state, and when the temperature detection device detects that the pump body temperature has dropped to a second temperature set value, the control valve switches from the open state to the closed state.

[0011] In an optional embodiment, the vacuum pump has a first operating state and a second operating state. In the first operating state, the control valve is closed and the vacuum pump evacuates the pressure vessel. In the second operating state, the control valve is open and external air enters the pump body through the inlet and outlet pipes to cool the vacuum pump.

[0012] In an optional embodiment, the control valve is a pneumatic control valve, and the vacuum pump system further includes a pneumatic control device, which includes an auxiliary gas tank, a solenoid valve group, and a pneumatic shut-off valve. The auxiliary gas tank is connected to the solenoid valve group, the solenoid valve group is connected to the pneumatic shut-off valve, and the pneumatic shut-off valve is connected to the control valve. When the temperature detection device detects that the pump body temperature has reached a first temperature set value, the pneumatic shut-off valve is used to control the control valve to switch between a first state and a second state.

[0013] In an optional embodiment, the pneumatic control device further includes a filter pressure reducing valve disposed between the auxiliary air tank and the solenoid valve assembly.

[0014] In an optional embodiment, the vacuum pump system further includes an oil tank and an oil level detection device, wherein the oil tank is connected to the pump body and the oil level detection device is disposed inside the oil tank.

[0015] In an optional embodiment, the vacuum pump system further includes a warning device that issues an alarm when the oil level detection device detects that the oil level in the tank is below a first threshold.

[0016] In an optional embodiment, the vacuum pump system further includes an alarm device that issues an alarm when the control valve is in the open state.

[0017] In an optional embodiment, the temperature detection device is disposed on the pump housing.

[0018] In an optional embodiment, the vacuum pump system further includes an electrical control device, which is electrically connected to the control valve and the temperature detection device, respectively.

[0019] An embodiment of this utility model also provides a vacuum suction device, including the vacuum pump system described in any of the above embodiments.

[0020] The beneficial effects of the vacuum pump system and vacuum suction equipment of this utility model embodiment include, for example:

[0021] This vacuum pump system includes a vacuum pump, a temperature detection device, a pressure vessel, and a control valve. The vacuum pump includes a pump body connected to inlet and outlet pipes, and the temperature detection device is located within the pump body. The pressure vessel is connected to the pump body via the inlet and outlet pipes. The control valve is located on the inlet and outlet pipes between the vacuum pump and the pressure vessel. The control valve has open and closed states. When the temperature detection device detects that the pump body temperature has reached a first set temperature value, the control valve switches from closed to open. After the control valve is in the open state, when the temperature detection device detects that the pump body temperature has dropped to a second set temperature value, the control valve switches from open to closed. By setting up a temperature detection device, the temperature of the vacuum pump can be monitored in real time to prevent the vacuum pump from overheating, which could affect its operating performance and increase safety hazards. By setting a control valve, and when the vacuum pump temperature is too high and reaches the first temperature set value, the control valve is opened, allowing outside free air to enter the vacuum pump body from the inlet of the control valve to cool and protect the vacuum pump. At the same time, because outside air is introduced, the vacuum pump cannot establish a negative pressure vacuum environment, and the vacuum pumping action automatically stops, thus protecting the vacuum pump from high temperature. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the vacuum suction device provided in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram from a first-view perspective of the vacuum pump system provided in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram from a second perspective of the vacuum pump system provided in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the pneumatic control device provided in an embodiment of the present invention.

[0027] Icons: 1000 - Vacuum suction equipment; 100 - Vacuum pump system; 110 - Vacuum pump; 111 - Pump body; 120 - Inlet and outlet pipes; 130 - Temperature detection device; 140 - Pressure vessel; 150 - Control valve; 160 - Pneumatic control device; 161 - Auxiliary air tank; 162 - Solenoid valve assembly; 163 - Pneumatic shut-off valve; 164 - Filter pressure reducing valve; 170 - Oil tank; 171 - Oil level detection device; 180 - Warning device; 190 - Electrical control device; 200 - Wastewater tank. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0031] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0033] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0034] A vacuum pump is a device used to extract gas from a container or system to create a vacuum environment. Vacuum pumps create a low-pressure environment through mechanical or physical means. Utilizing gas pressure differences and flow characteristics, gas is drawn into the pump from a low-pressure area, compressed, and then discharged, thus forming a vacuum. Vacuum pumps are widely used in industries such as metallurgy, chemicals, food processing, and electronic coating. However, vacuum pumps mostly use oil for lubrication, cooling, and leak-proof sealing. When the temperature of a vacuum pump becomes too high, it not only affects its normal operating performance but may also pose a risk of explosion.

[0035] Based on this, please refer to Figure 1 , Figure 2 and Figure 3 The vacuum pump system 100 provided in this embodiment of the present invention can effectively solve the aforementioned technical problems. The vacuum pump system 100 can provide high-temperature protection for the vacuum pump 110 to prevent it from overheating and affecting normal operating efficiency, thus improving safety. The vacuum pump system 100 in this embodiment is mainly used in the vacuum suction equipment 1000. Of course, the vacuum pump 110 can also be used in other systems such as semiconductor manufacturing. All equipment with this vacuum pump system 100 has the same functions as described above, and will not be elaborated further here.

[0036] Figure 1 This is a schematic diagram of the vacuum suction device 1000 provided in an embodiment of this utility model. Please refer to... Figure 1 In this embodiment, the vacuum suction device 1000 includes a vacuum pump system 100, which is connected to the wastewater tank 200 and other suction devices. The vacuum pump system 100 provides power to suction liquid or gas to a designated location or device. The vacuum suction device 100 may also include a processing device. The vacuum pump system 100 uses suction to transport liquid or gas from a source (such as a container, pipe, or environment) to the processing device, which then performs purification, filtration, separation, or chemical reaction on the fluid, ultimately achieving cleaning, recycling, or discharge.

[0037] Furthermore, the vacuum suction device 1000 may also have other structural forms or include other devices, depending on the actual suction situation, and is not limited here. The vacuum pump 110 is the core equipment for vacuum suction. In this embodiment, the vacuum pump 110 is a rotary vane vacuum pump 110. Of course, the vacuum pump 110 may also be a reciprocating vacuum pump 110 or other types of vacuum pumps 110, and is not limited here.

[0038] The vacuum pump system 100 will be described in detail below.

[0039] Figure 2 This is a schematic diagram from a first-view perspective of the vacuum pump system 100 provided in an embodiment of the present invention; Figure 3This is a schematic diagram from a second perspective of the vacuum pump system 100 provided in an embodiment of this utility model. Figure 2 and Figure 3 As shown, the vacuum pump system 100 in this embodiment includes a vacuum pump 110, a temperature detection device 130, a pressure vessel 140, and a control valve 150. The vacuum pump 110 includes a pump body 111, which is connected to an inlet / outlet pipe 120. The temperature detection device 130 is disposed on the pump body 111. The pressure vessel 140 is connected to the pump body 111 through the inlet / outlet pipe 120. The control valve 150 is disposed on the inlet / outlet pipe 120 between the vacuum pump 110 and the pressure vessel 140. The control valve 150 has an open state and a closed state. When the temperature detection device 130 detects that the temperature of the pump body 111 has reached a first temperature set value, the control valve 150 switches from closed to open. After the control valve 150 switches to open, when the temperature detection device 130 detects that the temperature of the pump body 111 has dropped to a second temperature set value, the control valve 150 switches from open to closed. The temperature of the vacuum pump 110 can be monitored in real time by setting the temperature detection device 130 to prevent the vacuum pump 110 from overheating and affecting its working performance and increasing safety hazards. By setting the control valve 150, when the temperature of the vacuum pump 110 is too high and reaches the first temperature set value, the control valve 150 is opened, and outside free air can enter the pump body 111 of the vacuum pump 110 from the air inlet of the control valve 150 to cool and protect the vacuum pump 110. At the same time, because outside air is introduced, the vacuum pump 110 cannot establish a negative pressure vacuum environment, and the vacuum pumping action is automatically stopped, thereby protecting the vacuum pump 110 from high temperature.

[0040] Specifically, the vacuum pump 110 in this embodiment has a first working state and a second working state. In the first working state, the control valve 150 is in the closed state, and the vacuum pump 110 evacuates the pressure vessel 140. In the second working state, the control valve 150 is in the open state, and external air enters the vacuum pump 110 through the inlet and outlet pipes 120 to cool the vacuum pump 110.

[0041] In this embodiment, the temperature detection device 130 is disposed on the outer casing of the pump body 111. Of course, the temperature detection device 130 can also be disposed on other components of the vacuum pump 110 that can sensitively provide feedback on the operating temperature of the vacuum pump 110, such as a motor. The temperature detection device 130 can be a temperature sensor, a temperature switch, etc., and is not limited thereto.

[0042] To improve automation, simplify manual operation, and increase response speed, the vacuum pump system 100 in this embodiment also includes an electrical control device 190, which is electrically connected to the control valve 150 and the temperature detection device 130. Based on the temperature signal fed back from the temperature detection device 130, the electrical control device 190 outputs a signal to the control valve 150 to switch between open and closed states. When the temperature detection device 130 detects that the pump body 111 temperature has reached a first temperature setpoint, the temperature detection device 130 transmits this signal to the electrical control device 190, which then sends a signal to switch the control valve 150 from the closed state to the open state. After the control valve 150 switches to the open state, the temperature detection device 130 continues to monitor the temperature of the pump body 111 in real time. When the temperature detection device 130 detects that the temperature of the pump body 111 has dropped to the second temperature set value, the temperature detection device 130 transmits a signal to the electrical control device 190. The electrical control device 190 then sends a signal to switch the control valve 150 from the open state to the closed state. In this embodiment, the electrical control device 190 includes a data terminal, which can receive and process signals and issue action commands to control the corresponding devices to perform actions.

[0043] The control valve 150 can be an automatic control valve, such as a pneumatic, hydraulic, or electrical control valve, or a manually controlled valve; no limitation is made here. To ensure that the vacuum pump 110 can operate normally at normal temperatures, the control valve 150 in this embodiment is a normally closed switch. When the electrical control device 190 receives a high-temperature signal from the temperature detection device 130, it provides a power source, such as a gas source or an electric source, to the control valve 150, causing the control valve 150 to open. Outside free air enters the vacuum pump 110 from the air inlet of the control valve 150, providing cooling protection for the vacuum pump 110. At the same time, because outside air is introduced, the vacuum pump 110 cannot establish a negative pressure vacuum environment, and the vacuum pumping action automatically stops, thereby providing high-temperature protection for the vacuum pump 110.

[0044] To improve response speed and control accuracy, please continue reading. Figure 2 and Figure 3, in this embodiment, the temperature detection device 130 is a temperature switch, which is arranged on the pump body 111; the temperature switch is electrically connected to the electrical control device 190. The temperature switch can be arranged inside the pump body 111 to monitor the operating temperature of the vacuum pump 110. The temperature switch senses the change of the ambient temperature through a temperature sensing element, that is, a temperature sensor. When the detected temperature exceeds the first temperature set value, the control circuit of the electrical control device 190 will output corresponding control signals, and the temperature switch will perform a closing action according to these signals, thereby cutting off the power supply to ensure that the equipment will not be damaged due to overheating. In other cases, the temperature switch remains in an open state. The temperature switch can also be arranged on the outer shell of the pump body 111 or other positions of the vacuum pump 110, such as the position with the highest pump shell temperature and relatively sensitive temperature change, which is not limited herein. The temperature switch in this embodiment is a on-off type switch. When the temperature at the temperature sensor installation point rises to a certain high temperature point T1 (T0 is the highest allowable working temperature of the vacuum pump 110, T1 is the temperature at the sensor installation point, and T1 ≤ T0), the electrical signal of the temperature switch is turned on, and a high temperature signal is sent to the electrical control device 190. When the vacuum pump 110 starts to cool down and the temperature at the temperature sensor installation point drops to T2 (T2 < T1), the temperature switch automatically disconnects, the electrical signal is disconnected, and no high temperature signal is sent to the electrical control device 190 anymore. The temperature switch has a simple structure, low cost, fast response speed, and is very convenient for maintenance.

[0045] The oil in the oil tank of the rotary vane pump and the oil in the pump cavity circulate with each other. The oil plays a role in lubricating and sealing the gap in the pump cavity. Generally, the oil volume in the pump cavity is maintained at 20% of the pump cavity volume. The oil in the pump cavity will be compressed together with the compressed gas, forming oil vapor particles that are discharged together with the gas. After long-term use, if the oil volume is lower than the safety value, it will cause the rotary vane and the pump cavity to be worn, and there is not enough oil to fill the gap between the components in the pump cavity, affecting the vacuum pumping effect; there are certain restrictions on the oil vapor content discharged. Exceeding this standard will pollute the environment, affect human health, and even pose a risk of explosion.

[0046] Therefore, please refer to Figure 2 and Figure 3The vacuum pump system 100 in this embodiment also includes an oil tank 170 and an oil level detection device 171. The oil tank 170 is connected to the pump body 111; the oil level detection device 171 is disposed inside the oil tank 170. To improve response speed and control accuracy, the oil level detection device 171 in this embodiment is a liquid level switch. The liquid level switch is connected to the oil tank 170 and electrically connected to the electrical control device 190. When the oil level in the oil tank 170 is lower than the lowest sensing point of the liquid level switch, that is, when the oil level in the oil tank 170 is lower than the first threshold, the liquid level switch opens and sends a low oil level signal to the electrical control device 190. When oil is added to the oil tank 170, if the oil level is higher than the first threshold, the liquid level switch closes, the liquid level switch electrical signal is disconnected, and no longer sends a low oil level signal to the electrical control device 190. In addition, the oil level detection device 171 can also be a liquid level sensor or other devices, which are not limited here. In this embodiment, the liquid level sensor is a float-type sensor. Of course, other types of sensors can also be used, and this is not limited here. By setting up the oil level detection device 171, the operator or the electrical control device 190 is reminded to automatically replenish the oil tank 170 to ensure the normal operation of the vacuum pump 110. The oil level detection device 171 can also be set on the vacuum pump 110, and its specific setting location is not limited here.

[0047] Please continue reading. Figure 2 and Figure 3 In this embodiment, the vacuum pump 110 also includes an alarm device 180. The alarm device 180 issues an alarm when the oil level detection device 171 detects that the oil level in the tank 170 is below a first threshold; and / or, the alarm device 180 issues an alarm when the control valve 150 is in the open state. That is, the alarm device 180 can determine whether to issue an alarm based solely on the detection status of the oil level detection device 171 or the open / closed state of the control valve 150. The alarm device 180 can be connected only to the oil level detection device 171, or only to the control valve 150. Alternatively, the alarm device 180 can be connected to both the oil level detection device 171 and the control valve 150.

[0048] In this embodiment, the warning device 180 can be a voice broadcaster, an audible and visual alarm, etc., and can be a voice warning, a light source warning, or a combination of sound and light warnings, etc., without limitation. In this embodiment, the low oil level alarm and high temperature alarm are set with different voice and / or light signals for easy differentiation.

[0049] The warning device 180 is electrically connected to the electrical control device 190. After the temperature detection device 130 or the oil level detection device 171 transmits a high temperature or low oil signal to the electrical control device 190, the electrical control device 190 can send a signal to the warning device 180 to provide an alarm.

[0050] Figure 4 This is a schematic diagram of the pneumatic system provided in an embodiment of this utility model. Please refer to [link / reference]. Figure 4 In this embodiment, the control valve 150 is a pneumatic control valve 150. The vacuum pump system 100 also includes a pneumatic control device 160, which includes an auxiliary gas tank 161, a solenoid valve group 162, and a pneumatic shut-off valve 163. The auxiliary gas tank 161 is connected to the solenoid valve group 162, the solenoid valve group 162 is connected to the pneumatic shut-off valve 163, and the pneumatic shut-off valve 163 is connected to the control valve 150. When the temperature detection device 130 detects that the pump body 111 temperature has reached the first temperature set value, the pneumatic shut-off valve 163 is used to control the control valve 150 to switch between the first state and the second state. The pneumatic shut-off valve 163 is used to control the opening and closing of the control valve 150. When the control valve 150 needs to be opened, the solenoid valve assembly 162 is energized to connect the auxiliary gas tank 161, supplying air to the pneumatic shut-off valve 163 and driving its piston rod to open the control valve 150. When the control valve 150 does not need to be opened, the solenoid valve assembly 162 is de-energized, blocking the air path between the auxiliary gas tank 161 and the pneumatic shut-off valve 163. At this time, the piston rod does not move, and the control valve 150 is closed. By setting up the pneumatic control device 160, the automation level of the vacuum pump system 100 can be improved, manual operation can be reduced, and work efficiency can be improved.

[0051] In addition, please continue to refer to Figure 4 To ensure the safe and stable operation of the system, the vacuum pump 110 in this embodiment also includes a filter and pressure reducing valve 164, which is located between the auxiliary gas tank 161 and the solenoid valve assembly 162. The filter and pressure reducing valve 164 has both filtering and pressure reducing functions, and it ensures the safe and stable operation of the system by removing impurities and stabilizing the output pressure.

[0052] Of course, the pneumatic control system can also be in other structural forms, as long as it can control the opening and closing of the control valve 150, and no limitation is made here.

[0053] The working principle of the vacuum pump 110 provided in this embodiment is as follows:

[0054] The working principle of the high temperature alarm protection of vacuum pump 110 is as follows: When vacuum pump 110 reaches its maximum allowable operating temperature, i.e., the first temperature setpoint, it triggers the temperature switch. The temperature sensor transmits a signal to the electrical control device 190, which then sends a signal to the warning device 180 for alarm notification. Simultaneously, the electrical control device 190 issues a command to open the control valve 150, allowing outside free air to enter the vacuum system from the inlet of the control valve 150, thus cooling and protecting vacuum pump 110. At the same time, the sewage tank 200 cannot establish a negative pressure vacuum (or flowing air), and the vacuum suction operation automatically stops.

[0055] The working principle of the low oil level alarm protection for vacuum pump 110 is as follows: During the operation of vacuum pump 110, the lubricating oil used for lubrication and sealing is continuously consumed and reduced, causing the oil level in oil tank 170 to continuously decrease. Oil tank 170 is equipped with an oil level detection device 171. When the oil level drops to the trigger point of the minimum oil level sensor, i.e., when the oil level in oil tank 170 is lower than the first threshold, the level switch opens, the electrical signal of the level sensor is activated, and a low oil level signal is sent to the electrical control device 190. The electrical control device 190 then sends a signal to the warning device 180 to provide a low oil level alarm. When oil is added to oil tank 170, if the oil level is higher than the first threshold, the level switch closes, the electrical signal of the oil level detection device 171 is disconnected, and no longer a low oil level signal is sent to the electrical control device 190.

[0056] In summary, the vacuum pump system 100 includes a vacuum pump 110, a temperature detection device 130, a pressure vessel 140, and a control valve 150. The vacuum pump 110 includes a pump body 111, which is connected to an inlet / outlet pipe 120. The temperature detection device 130 is disposed on the pump body 111. The pressure vessel 140 is connected to the pump body 111 through the inlet / outlet pipe 120. The control valve 150 is disposed on the inlet / outlet pipe 120 between the vacuum pump 110 and the pressure vessel 140. The control valve 150 has an open state and a closed state. When the temperature detection device 130 detects that the temperature of the pump body 111 has reached a first temperature set value, the control valve 150 switches from closed to open. After the control valve 150 switches to open, when the temperature detection device 130 detects that the temperature of the pump body 111 has dropped to a second temperature set value, the control valve 150 switches from open to closed. The temperature of the vacuum pump 110 can be monitored in real time by setting the temperature detection device 130 to prevent the vacuum pump 110 from overheating and affecting its working performance and increasing safety hazards. By setting the control valve 150, when the temperature of the vacuum pump 110 is too high and reaches the first temperature set value, the control valve 150 is opened, and outside free air can enter the pump body 111 of the vacuum pump 110 from the air inlet of the control valve 150 to cool and protect the vacuum pump 110. At the same time, because outside air is introduced, the vacuum pump 110 cannot establish a negative pressure vacuum environment, and the vacuum pumping action is automatically stopped, thereby protecting the vacuum pump 110 from high temperature.

[0057] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum pumping system, characterized by, include: A vacuum pump (110) includes a pump body (111) and an inlet / outlet pipe (120) connected to the pump body (111). Temperature detection device (130) is disposed on the pump body (111). Pressure vessel (140), which is connected to pump body (111) via inlet and outlet pipes (120); A control valve (150) is disposed on the inlet and outlet pipe (120) between the vacuum pump (110) and the pressure vessel (140). The control valve (150) has an open state and a closed state. When the temperature detection device (130) detects that the temperature of the pump body (111) has reached a first temperature set value, the control valve (150) switches from the closed state to the open state. After the control valve (150) switches to the open state, and when the temperature detection device (130) detects that the temperature of the pump body (111) has dropped to a second temperature set value, the control valve (150) switches from the open state to the closed state.

2. The vacuum pumping system of claim 1, wherein, The vacuum pump (110) has a first working state and a second working state. In the first working state, the control valve (150) is closed and the vacuum pump (110) evacuates the pressure vessel (140). In the second working state, the control valve (150) is open and external air enters the pump body (111) through the inlet and outlet pipes (120) to cool the vacuum pump (110).

3. The vacuum pumping system of claim 2, wherein, The control valve (150) is a pneumatic control valve (150). The vacuum pump system (100) also includes a pneumatic control device (160). The pneumatic control device (160) includes an auxiliary gas tank (161), a solenoid valve group (162), and a pneumatic shut-off valve (163). The auxiliary gas tank (161) is connected to the solenoid valve group (162), the solenoid valve group (162) is connected to the pneumatic shut-off valve (163), and the pneumatic shut-off valve (163) is connected to the control valve (150). When the temperature detection device (130) detects that the temperature of the pump body (111) has reached the first temperature setting value, the pneumatic shut-off valve (163) is used to control the control valve (150) to switch between the first state and the second state.

4. The vacuum pump system according to claim 3, characterized in that, The pneumatic control device (160) also includes a filter pressure reducing valve (164), which is disposed between the auxiliary air tank (161) and the solenoid valve group (162).

5. The vacuum pumping system of claim 1, wherein, The vacuum pump system (100) also includes an oil tank (170) and an oil level detection device (171), wherein the oil tank (170) is connected to the pump body (111); and the oil level detection device (171) is located inside the oil tank (170).

6. The vacuum pumping system of claim 5, wherein, The vacuum pump system (100) also includes a warning device (180) that issues an alarm when the oil level detection device (171) detects that the oil level in the tank (170) is lower than a first threshold.

7. The vacuum pumping system of claim 1, wherein, The vacuum pump system (100) also includes an alarm device (180) that sounds an alarm when the control valve (150) is in the open state.

8. The vacuum pumping system of claim 1, wherein, The temperature detection device (130) is located on the outer shell of the pump body (111).

9. The vacuum pumping system of claim 1, wherein, The vacuum pump system (100) also includes an electrical control device (190), which is electrically connected to the control valve (150) and the temperature detection device (130), respectively.

10. A vacuum suction device, characterized by Includes the vacuum pump system (100) according to any one of claims 1-9.

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