Vacuum power device for providing stable negative pressure

Abstract

The utility model relates to a vacuum power device for providing stable negative pressure. The whole device comprises a sewage pump, a vacuum pump, a vacuum tank, a gas-water separator, an electric contact pressure gauge, a vacuum breaking electromagnetic valve, an inlet electric ball valve and an intelligent control system. The inlet electric ball valve is positioned on a connecting pipeline of the inlet of the vacuum tank and the front-end system; a water inlet of the sewage pump is connected to the bottom of the vacuum tank; the vacuum tank is provided with a high-liquid-level switch and a low-liquid-level switch, the high-liquid-level switch is located above a tank body of the vacuum tank, and the low-liquid-level switch is located below the tank body of the vacuum tank; the electro connecting pressure gauge and the vacuum breaking solenoid valve are positioned at the top of the vacuum tank; an inlet pipeline of the vacuum pump is connected to the upper part of the vacuum tank; and a working water pipeline of the vacuum pump is provided with a manual valve. The device is wide in application range, good in stability and convenient to install and overhaul; the integrated system taking the vacuum tank as the vacuum storage equipment saves energy compared with the direct use of the vacuum pump on the occasion that the vacuum source is frequently used, and the service life of the vacuum pump is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to a vacuum power device, in particular to a vacuum power device with a compact structure, good stability, capable of stably maintaining the required vacuum under working conditions and providing a stable negative pressure. Background Art

[0002] In the central stations that supply medical gases in various large and medium-sized hospitals in China, the canning systems in the light industry, the impregnation of flame-retardant conveyor belts used in coal mines, etc., all require frequent use of vacuum sources. Since the required air extraction volume is not large, using a vacuum pump alone to maintain the vacuum requires the vacuum pump to keep running without stopping, wasting a large amount of energy, and the vacuum cannot be stably maintained within the required vacuum range.

[0003] Now, the country emphasizes energy conservation, consumption reduction and sustainable development. Selecting a safe, reliable, economical and efficient pump product is a very important matter. A vacuum power device that uses a vacuum pump to generate vacuum and uses a vacuum tank as a vacuum storage device to provide a stable negative pressure enables stable operation in various working conditions where a vacuum source is required. Summary of the Utility Model

[0004] Aiming at the above problems, the main purpose of the utility model is to provide a vacuum power device with a compact structure, good stability, capable of stably maintaining the required vacuum under working conditions and providing a stable negative pressure.

[0005] The utility model solves the above technical problems through the following scheme: A vacuum power device that provides a stable negative pressure, the vacuum power device that provides a stable negative pressure includes: a vacuum pump, a vacuum tank, a sewage pump, a gas-water separator. An inlet valve is provided on the connecting pipeline between the inlet of the vacuum tank and the front-end system. The bottom of the vacuum tank is connected to the water inlet of the sewage pump. The vacuum tank is equipped with a high-level switch and a low-level switch. The high-level switch is located above the tank body of the vacuum tank, and the low-level switch is located below the tank body of the vacuum tank.

[0006] An electric contact pressure gauge and a vacuum-breaking solenoid valve are provided on the top of the vacuum tank. The working water pipeline of the vacuum pump is equipped with a manual valve; the vacuum pump includes a first vacuum pump and a second vacuum pump; the first vacuum pump and the second vacuum pump are symmetrically arranged on both sides of the gas-water separator.

[0007] The first vacuum pump is connected to the vacuum tank through a pipeline, and the first vacuum pump is connected to the gas-water separator through two pipelines, one of which is an exhaust pipeline and the other is a liquid replenishing pipeline; the second vacuum pump is connected to the vacuum tank through a pipeline, and the second vacuum pump is connected to the gas-water separator through two pipelines, one of which is an exhaust pipeline and the other is a liquid replenishing pipeline.

[0008] The vacuum pump is connected to the vacuum tank through the suction pipeline; a liquid replenishing pipe is arranged on the side of the gas-water separator, and a treatment pipe for the rear gas to go to post-treatment is arranged at the top of the gas-water separator.

[0009] In a specific embodiment of the present utility model, the high liquid level switch is located at the position of 5 / 8 - 7 / 8 of the tank height of the entire vacuum tank, and the low liquid level switch is located at the position of 1 / 8 - 3 / 8 of the tank height of the entire vacuum tank.

[0010] In a specific embodiment of the present utility model, the high liquid level switch is located at the position of 3 / 4 of the tank height of the entire vacuum tank, and the low liquid level switch is located at the position of 1 / 4 of the tank height of the entire vacuum tank.

[0011] In a specific embodiment of the present utility model, the inlet valve is an inlet electric ball valve.

[0012] In a specific embodiment of the present utility model, an overflow pipe and a high and low liquid level switch coordinated with a liquid level gauge are arranged on the gas-water separation tank.

[0013] The positive and progressive effects of the present utility model are as follows: Compared with common similar technologies, the vacuum power device providing stable negative pressure provided by the present utility model mainly has the following three advantages: First, the unit design has a compact structure, beautiful appearance, good stability, and is convenient for installation and maintenance; Second, the vacuum power device can stably maintain the vacuum demand under the required working conditions without wasting energy; Third, by using vacuum automatic maintenance, automatic control is realized, the vacuum source can be quickly provided, and the excess liquid medium from the system can be discharged. Description of the Drawings

[0014] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0015] The following are the names corresponding to the reference numerals in the present utility model:

[0016] Figure 1 In:

[0017] Vacuum pump 1, vacuum tank 2, sewage pump 3, gas-water separator 4, inlet valve 5, high liquid level switch 6, low liquid level switch 7, electric contact pressure gauge 8, vacuum-breaking solenoid valve 9, liquid replenishing pipe 10, treatment pipe 11, exhaust pipeline 12, liquid replenishing pipeline 13, suction pipeline 14, first vacuum pump 101, second vacuum pump 102. Detailed Embodiment

[0018] The following presents a preferred embodiment of the present utility model in conjunction with the drawings to elaborate in detail on the technical solution of the present utility model.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model. As Figure 1As shown in the figure: A vacuum power device for providing stable negative pressure proposed by the present utility model, the vacuum power device for providing stable negative pressure includes: a vacuum pump 1, a vacuum tank 2, a sewage pump 3, a gas-water separator 4. An inlet valve 5 is provided on the connecting pipeline between the inlet of the vacuum tank 1 and the front-end system. The bottom of the vacuum tank 2 is connected to the water inlet of the sewage pump 3. The vacuum tank 2 is equipped with a high liquid level switch 6 and a low liquid level switch 7. The high liquid level switch 6 is located above the tank body of the vacuum tank 2, and the low liquid level switch 7 is located below the tank body of the vacuum tank. The entire vacuum power device is controlled by an intelligent control system.

[0020] An electric contact pressure gauge 8 and a vacuum-breaking solenoid valve 9 are provided at the top of the vacuum tank 2. The working water pipeline of the vacuum pump 1 is equipped with a manual valve; the vacuum pump 1 includes a first vacuum pump 101 and a second vacuum pump 102; the first vacuum pump 101 and the second vacuum pump 102 are symmetrically arranged on both sides of the gas-water separator 4. The first vacuum pump 101 is connected to the vacuum tank 1 through a pipeline, and the first vacuum pump 101 is connected to the gas-water separator 4 through two pipelines, one of which is an exhaust pipeline 12 and the other is a liquid replenishment pipeline 13; the second vacuum pump 102 is connected to the vacuum tank 1 through a pipeline, and the second vacuum pump 102 is connected to the gas-water separator 4 through two pipelines, one of which is an exhaust pipeline 12 and the other is a liquid replenishment pipeline; the vacuum pump 1 is connected to the vacuum tank 2 through an intake pipeline 14; a liquid replenishment pipe 10 is provided on the side of the gas-water separator 4, and a treatment pipe 11 for the rear gas to go to post-treatment is provided at the top of the gas-water separator 4.

[0021] In the present utility model, the high liquid level switch is located at the position of 5 / 8 - 7 / 8 of the height of the entire vacuum tank body, and the low liquid level switch is located at the position of 1 / 8 - 3 / 8 of the height of the entire vacuum tank body. In the specific implementation process, the following preferred values are adopted. The high liquid level switch is located at the position of 3 / 4 of the height of the entire vacuum tank body, and the low liquid level switch is located at the position of 1 / 4 of the height of the entire vacuum tank body.

[0022] In the specific implementation process, the inlet valve 5 of the present utility model is generally selected as an inlet electric ball valve.

[0023] In the specific implementation process, an overflow pipe and high and low liquid level switches (not shown in the figure) coordinated with a liquid level gauge are provided on the gas-water separation tank 4 of the present utility model.

[0024] The vacuum pump 1 sucks the gas from the front end, through the vacuum tank and then into the vacuum pump 1, and then discharges it into the gas-water separator 4, and finally discharges it to the back-end treatment (if it is clean gas, it can be directly discharged to the atmosphere); since the vacuum pump will carry away a part of the working fluid in the pump itself when exhausting, in order to ensure the continuous and stable operation of the pump, in addition to the function of gas-water separation, the gas-water separator 4 also acts as the working fluid water tank of the vacuum pump 1 to continuously supply the working fluid to the vacuum pump 1; in addition to the part of water left after gas-water separation, it is also necessary to supplement an additional part of the working fluid from the outside, so a liquid level gauge, high and low liquid level switches are configured on the gas-water separator 4 to monitor the liquid level, and when the liquid level in the tank drops to the low liquid level switch, the solenoid valve is opened to supply water into the gas-water separator 4 until the liquid level reaches the high liquid level switch, ensuring the operation stability of the vacuum pump.

[0025] During the initial operation, after pumping the pressure in the vacuum tank to the required vacuum degree according to the requirements of the on-site working conditions, stop the machine; when the vacuum degree in the vacuum tank drops outside the allowable range of the on-site working conditions, restart the vacuum pump; during the whole operation process, if the liquid medium level entering the vacuum tank from the front-end process pipeline reaches the high liquid level switch, at this time, close the inlet electric ball valve, open the air release solenoid valve at the top of the vacuum tank and then start the sewage pump to discharge the liquid in the vacuum tank; when the liquid level in the vacuum tank reaches the low liquid level switch as the liquid is discharged, stop the sewage pump and close the vacuum-breaking solenoid valve, and finally open the inlet electric ball valve to reconnect the vacuum power device to the system.

[0026] The present utility model uses a system formed by a sewage pump and a vacuum pump; the present utility model adopts an automatic electric control system formed by a sewage pump motor, a vacuum-breaking solenoid valve, an inlet electric ball valve, a high liquid level switch and a low liquid level switch, as well as a vacuum pump motor and an electric contact pressure gauge at the top of the vacuum tank.

[0027] The start and stop of the sewage pump are controlled by the high and low liquid level switch signals on the vacuum tank, stopping at high liquid level and starting at low liquid level. The start and stop of the vacuum pump are controlled by the electric contact pressure gauge on the vacuum tank, and the start and stop are controlled according to the required vacuum degree range of the on-site working conditions.

[0028] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A vacuum power device for providing a stable negative pressure, characterized in that: The vacuum power device for providing stable negative pressure comprises: a vacuum pump, a vacuum tank, a sewage pump, a gas-water separator, an inlet valve is arranged on the connecting pipeline between the inlet of the vacuum tank and the front-end system, the bottom of the vacuum tank is connected to the water inlet of the sewage pump, the vacuum tank is provided with a high liquid level switch and a low liquid level switch, the high liquid level switch is located above the tank body of the vacuum tank, and the low liquid level switch is located below the tank body of the vacuum tank; An electric contact pressure gauge and a vacuum breaking solenoid valve are arranged on the top of the vacuum tank, and a manual valve is provided on the working water pipeline of the vacuum pump; the vacuum pump comprises a first vacuum pump and a second vacuum pump; the first vacuum pump and the second vacuum pump are arranged symmetrically on both sides of the gas-water separator; The first vacuum pump is connected to the vacuum tank through a pipeline, and the first vacuum pump is connected to the gas-water separator through two pipelines, one of which is an exhaust pipeline and the other is a liquid replenishing pipeline; the second vacuum pump is connected to the vacuum tank through a pipeline, and the second vacuum pump is connected to the gas-water separator through two pipelines, one of which is an exhaust pipeline and the other is a liquid replenishing pipeline; The vacuum pump is connected to the vacuum tank through an air suction pipe; a liquid replenishing pipe is arranged on the side of the gas-water separator, and a processing pipe for post-gas post-processing is arranged on the top of the gas-water separator.

2. The vacuum power device for providing stable negative pressure according to claim 1, characterized in that: The high liquid level switch is located at 5 / 8-7 / 8 of the tank height of the entire vacuum tank, and the low liquid level switch is located at 1 / 8-3 / 8 of the tank height of the entire vacuum tank.

3. The vacuum power device for providing stable negative pressure according to claim 2, characterized in that: The high liquid level switch is located at 3 / 4 of the tank height of the entire vacuum tank, and the low liquid level switch is located at 1 / 4 of the tank height of the entire vacuum tank.

4. The vacuum power device for providing stable negative pressure according to claim 1, characterized in that: The inlet valve is an inlet electric ball valve.

5. The vacuum power device for providing stable negative pressure according to claim 1, characterized in that: The gas-water separation tank is provided with an overflow pipe and a high and low liquid level switch installed together with a liquid level meter.

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