Negative pressure supply device

Abstract

The utility model relates to the technical field of negative pressure supply systems, and discloses a negative pressure supply device. Wherein the negative pressure supply device comprises a vacuum unit, a filter unit and a buffer unit, and the vacuum unit is used for enabling an energy consumption device communicated with an air inlet of the vacuum unit to have negative pressure; the filtering unit is arranged between the vacuum unit and the energy consumption device and comprises a first filter and a second filter, the second filter is communicated with an air inlet of the vacuum unit, the first filter is communicated with one end, far away from the vacuum unit, of the second filter, and the filtering aperture of the first filter is larger than that of the second filter; the buffer unit is communicated with the upstream of the air inlet of the vacuum unit and used for buffering the negative pressure provided by the vacuum unit. According to the utility model, the cleanliness of air entering the vacuum machine can be effectively improved; and meanwhile, the negative pressure generated by the vacuum unit is buffered.

Description

A negative pressure supply device Technical Field

[0001] This utility model relates to the field of negative pressure supply system technology, and in particular to a negative pressure supply device. Background Technology

[0002] Cigarette factory power workshops typically require negative pressure, which can be supplied by a water ring vacuum unit. The vacuum pump consists of an eccentric wheel rotating within the pump body, which throws the working fluid onto the inner wall of the pump body to form a closed water ring. A crescent-shaped space is formed between the impeller and the closed water ring, and this space is further divided by the impeller into several small chambers equal to the number of impellers. During the first half of the impeller's working cycle, the volume of the small chambers increases and connects to the small intake holes on the end face, allowing gas to be drawn in. During the second half of the impeller's working cycle, the volume of the small chambers decreases, compressing the gas. When the small chamber connects to the exhaust port, the gas is discharged. With the stable rotation of the impeller, the intake and exhaust processes continue continuously, thus continuously drawing in gas and generating negative pressure at the energy consumption end.

[0003] However, the existing technology still has the following problems in the negative pressure supply process: air from the production site directly enters the vacuum pump, which will bring dust, particles and other impurities from the production site into the vacuum pump, resulting in low quality of working fluid in the vacuum pump, corrosion of the pump body, and severe blockage of the unit cooler, causing the unit to overheat. Frequent cleaning of the unit cooler and basket filter is required, which affects normal production. When the operating unit fails and trips or needs to be replaced during operation, the negative pressure will drop sharply, and the negative pressure supply pressure will be seriously insufficient, which will have a significant impact on normal production.

[0004] Therefore, there is an urgent need for a negative pressure supply device to solve the above problems. Summary of the Invention

[0005] Based on the above, the purpose of this utility model is to provide a negative pressure supply device that effectively improves the cleanliness of the air entering the vacuum machine; at the same time, it has a buffering effect on the negative pressure generated by the vacuum unit.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A negative pressure supply device, comprising:

[0008] A vacuum unit is used to provide negative pressure to an energy-consuming device connected to its air inlet.

[0009] A filter unit is disposed between the vacuum unit and the power-consuming device. The filter unit includes a first filter and a second filter. The second filter is connected to the air inlet of the vacuum unit. The first filter is connected to the end of the second filter away from the vacuum unit, and the filter pore size of the first filter is larger than that of the second filter.

[0010] A buffer unit is connected upstream of the air inlet of the vacuum unit and is used to buffer the negative pressure provided by the vacuum unit.

[0011] As a preferred embodiment of the negative pressure supply device, the buffer unit is disposed between the vacuum unit and the filter unit.

[0012] As a preferred embodiment of the negative pressure supply device, the filter unit is further provided with a third filter, which is disposed between the buffer unit and the air inlet. The pore size of the third filter is smaller than that of the second filter.

[0013] As a preferred embodiment of the negative pressure supply device, the first filter is configured as a cyclone separator, and / or the second filter is configured as a precision filter, and / or the buffer unit is configured as a negative pressure buffer tank.

[0014] As a preferred embodiment of the negative pressure supply device, two or more second filters are connected in parallel.

[0015] As a preferred embodiment of the negative pressure supply device, the two ends of the first filter are also connected to non-filtering branches, and non-filtering gate valves are installed on the non-filtering branches.

[0016] As a preferred embodiment of the negative pressure supply device, the negative pressure supply device is further provided with a sewage discharge pipe, which is located between the filter unit and the air inlet.

[0017] As a preferred embodiment of the negative pressure supply device, the vacuum unit is provided with two or more vacuum units, which are connected in parallel to be connected in series with the filter unit and the buffer unit.

[0018] As a preferred embodiment of the negative pressure supply device, the negative pressure supply device is further provided with a cooling unit. The vacuum unit is further provided with a first water inlet, a second water inlet and a water outlet. The first water inlet is connected to the water supply device, the water outlet is connected to the cooling inlet of the cooling unit, and the cooling outlet of the cooling unit is connected to the second water inlet.

[0019] As a preferred embodiment of the negative pressure supply device, the cooling unit includes a cooling tower, a working liquid tank, and a pump set. One end of the cooling tower is connected to the water outlet, and the other end is connected to the working liquid tank. The pump set is used to pump the working liquid in the working liquid tank into the second water inlet. The working liquid tank is also connected to the water supply device. The vacuum unit is also provided with a drain outlet.

[0020] The beneficial effects of this utility model are as follows:

[0021] This invention incorporates a vacuum unit that draws air from the energy-consuming device through its inlet, creating a negative pressure environment. A filter unit between the vacuum unit and the energy-consuming device filters the incoming air, preventing dust, particles, and other impurities from the production environment from entering the vacuum unit. This results in higher gas cleanliness within the vacuum unit, reducing the corrosiveness of the working fluid and minimizing overheating caused by blockages. It also reduces the need for frequent cleaning of the vacuum unit, improving the reliability and efficiency of the negative pressure supply device. Furthermore, a buffer unit upstream of the vacuum unit's inlet buffers the negative pressure provided by the vacuum unit in case of malfunction, shutdown, or a sudden drop in negative pressure due to unit replacement. This prevents sudden and severe pressure shortages at the energy-consuming device, minimizing disruption to normal production and ensuring the stability and safety of the negative pressure supply device.

[0022] In summary, the aforementioned negative pressure supply device isolates impurities before the vacuum unit, reducing the frequency of cleaning and maintenance within the vacuum unit, thus resulting in a longer maintenance cycle; impurities do not enter the vacuum unit, keeping the working fluid of the vacuum unit clean and ensuring that the vacuum unit generates a good vacuum degree, thus resulting in higher quality working fluid for the vacuum unit; and the pressure is always maintained within a stable range, thus making the negative pressure supply indicators more stable. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1 is a schematic diagram of the negative pressure supply device provided in a specific embodiment of this utility model.

[0025] In the picture:

[0026] 1. Energy-consuming devices; 2. Water supply devices;

[0027] 100. Vacuum unit; 110. Vacuum assembly; 111. Air inlet; 112. Third filter; 113. First water inlet; 114. Second water inlet; 115. Water outlet; 116. Drain outlet; 120. Drainage pipe;

[0028] 200, Filtering unit; 210, First filter; 211, Non-filtering branch; 212, Non-filtering gate valve; 220, Second filter;

[0029] 300. Buffer unit;

[0030] 400. Cooling unit; 410. Cooling tower; 420. Working fluid tank; 430. Pump set. Detailed Implementation

[0031] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0033] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and connections within two components or interactions between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0036] As shown in Figure 1, this embodiment provides a negative pressure supply device, which includes a vacuum unit 100, a filter unit 200, and a buffer unit 300. The vacuum unit 100 is used to provide negative pressure to the energy-consuming device 1 connected to its air inlet 111. The filter unit 200 is disposed between the vacuum unit 100 and the energy-consuming device 1. The filter unit 200 includes a first filter 210 and a second filter 220. The second filter 220 is connected to the air inlet 111 of the vacuum unit 100. The first filter 210 is connected to the end of the second filter 220 away from the vacuum unit 100, and the pore size of the first filter 210 is larger than that of the second filter 220. The buffer unit 300 is connected to the upstream of the air inlet 111 of the vacuum unit 100 and is used to buffer the negative pressure provided by the vacuum unit 100.

[0037] By setting up a vacuum unit 100, which draws air from the energy-consuming device 1 through the air inlet 111, the energy-consuming device 1 is provided with a negative pressure environment. A filter unit 200 is installed between the vacuum unit 100 and the energy-consuming device 1 to filter the air entering the air inlet 111, preventing dust, particles, and other impurities from the production site from being brought into the vacuum unit 100. This results in higher gas cleanliness within the vacuum unit 100, reducing the corrosiveness of the working fluid within the vacuum unit 100, and also reducing overheating caused by blockage of the vacuum unit 100. This also avoids the need for frequent cleaning of the vacuum unit 100, improving the reliability and efficiency of the negative pressure supply device. In addition, by setting a buffer unit 300 upstream of the air inlet 111 of the vacuum unit 100, when the vacuum unit 100 fails and trips or when the unit needs to be replaced during operation, resulting in a sharp drop in negative pressure, the buffer unit 300 can be used to buffer the negative pressure provided by the vacuum unit 100, so that the negative pressure supply at the energy-consuming device 1 will not suddenly experience a severe pressure shortage, thereby reducing the impact on normal production and ensuring the working stability and safety of the negative pressure supply device.

[0038] In summary, the aforementioned negative pressure supply device isolates impurities before the vacuum unit 100, reducing the frequency of cleaning and maintenance within the vacuum unit 100, thus resulting in a longer maintenance cycle; impurities do not enter the vacuum unit 100, keeping the working fluid of the vacuum unit 100 clean and ensuring that the vacuum unit 100 generates a good vacuum, thus resulting in higher quality working fluid of the vacuum unit 100; and the pressure is always maintained within a stable range, thus making the negative pressure supply indicators more stable.

[0039] Specifically, the second filter 220 is connected to the air inlet 111 of the vacuum unit 100, and the first filter 210 is connected to the end of the second filter 220 away from the vacuum unit 100. The pore size of the first filter 210 is larger than that of the second filter 220. That is, the gas extracted by the self-powered device 1 first passes through the coarse filtration of the first filter 210 and then through the fine filtration of the second filter 220 before entering the vacuum unit 100. The double filtration results in a better filtration effect.

[0040] Preferably, the buffer unit 300 is disposed between the vacuum unit 100 and the filter unit 200, so that the gas entering the buffer unit 300 is also filtered by the filter unit 200, and the cleanliness of the gas in the buffer unit 300 is also guaranteed.

[0041] To improve the negative pressure supply capacity of the negative pressure supply device, the vacuum unit 100 is equipped with two or more vacuum units 110, which are connected in parallel to be connected in series with the filter unit 200 and the buffer unit 300. That is, the negative pressure supply device is equipped with only one filter unit 200 and one buffer unit 300.

[0042] Furthermore, the filter unit 200 is also provided with a third filter 112, which is located between the buffer unit 300 and the air inlet 111. The pore size of the third filter 112 is smaller than that of the second filter 220. It is worth noting that when the vacuum unit 100 is provided with two or more vacuum units 110, each vacuum unit 110 is provided with a third filter 112, that is, the third filter 112 is provided in a one-to-one correspondence with the vacuum unit 110.

[0043] For example, the first filter 210 is configured as a cyclone separator. When the inhaled gas passes through the cyclone separator, the cyclone separator, through the rotational motion caused by the tangential introduction of the airflow, throws solid particles or droplets with large inertial centrifugal force toward the outer wall surface to separate them, thereby separating larger solid particles or droplets. In other words, the cyclone separator can remove larger particles. And / or, the second filter 220 is configured as a precision filter. The gas after preliminary filtration flows into the precision filter, and the gas flowing into the precision filter passes through multiple layers of filter media to filter out tiny dust particles. In other words, the precision filter removes fine particles. By simultaneously configuring a cyclone separator and a precision filter, the gas passing through the cyclone separator and the precision filter becomes purer. And / or, the buffer unit 300 is configured as a negative pressure buffer tank. The negative pressure buffer tank can buffer and prevent gas backflow. During normal negative pressure supply, it can also stabilize the pressure, making the negative pressure supply more stable. When the negative pressure supply fluctuates, the negative pressure buffer tank can buffer and stabilize the pressure, preventing drastic fluctuations in negative pressure.

[0044] Preferably, two or more second filters 220 are connected in parallel, which can effectively improve filtration efficiency. Optionally, both ends of the first filter 210 are also connected to a non-filtration branch 211, and a non-filtration gate valve 212 is provided on the non-filtration branch 211. By controlling the non-filtration gate valve 212, the on / off state of the non-filtration branch 211 can be controlled, so that when filtration by the first filter 210 is not required, the non-filtration branch 211 is opened, allowing gas to directly enter the second filter 220 through the non-filtration branch 211, thereby expanding the applicability of the negative pressure supply device.

[0045] Furthermore, the negative pressure supply device is also equipped with a drain pipe 120, which is located between the filter unit 200 and the air inlet 111. It is used to discharge impurities in the pipe before the air inlet 111 to prevent impurities from entering the vacuum unit 100 and causing adverse effects.

[0046] In this embodiment, the negative pressure supply device is further provided with a cooling unit 400. Each vacuum unit 110 of the vacuum unit 100 is provided with a first water inlet 113, a second water inlet 114, and a water outlet 115. The first water inlet 113 is connected to the water supply device 2, the water outlet 115 is connected to the cooling inlet of the cooling unit 400, and the cooling outlet of the cooling unit 400 is connected to the second water inlet 114. It can be understood that the dashed line in Figure 1 shows the gas path in the negative pressure supply device, which is implemented as the liquid path in the negative pressure supply device. Furthermore, in order to control the opening and closing of the gas path and the liquid path, check valves, gate valves, ball valves, and electric valves can be correspondingly set on each gas path and liquid path as needed. Those skilled in the art can set them as needed, and no specific limitation is made here.

[0047] Specifically, the cooling unit 400 includes a cooling tower 410, a working fluid tank 420, and a pump set 430. One end of the cooling tower 410 is connected to the outlet 115, and the other end is connected to the working fluid tank 420. The pump set 430 is used to pump the working fluid in the working fluid tank 420 into the second inlet 114. The pump set 430 includes three cooling pumps connected in parallel to improve the efficiency and reliability of pumping the working fluid. The working fluid tank 420 is also connected to the water supply device 2, meaning that the water supply device 2 can also supply working fluid to the working fluid tank 420. Optionally, the working fluid is water. The vacuum unit 110 is also provided with a drain port 116 to discharge the remaining working fluid and prevent the working fluid from remaining in the vacuum unit 110 for a long time.

[0048] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A negative pressure supply device, characterized in that, include: A vacuum unit (100) is used to give a negative pressure to an energy-consuming device (1) connected to its air inlet (111); A filter unit (200) is disposed between the vacuum unit (100) and the power-consuming device (1). The filter unit (200) includes a first filter (210) and a second filter (220). The second filter (220) is connected to the air inlet (111) of the vacuum unit (100). The first filter (210) is connected to the end of the second filter (220) away from the vacuum unit (100), and the pore size of the first filter (210) is larger than the pore size of the second filter (220). A buffer unit (300) is connected to the upstream of the air inlet (111) of the vacuum unit (100) and is used to buffer the negative pressure provided by the vacuum unit (100).

2. The negative pressure supply device according to claim 1, characterized in that, The buffer unit (300) is disposed between the vacuum unit (100) and the filter unit (200).

3. The negative pressure supply device according to claim 2, characterized in that, The filter unit (200) is also provided with a third filter (112), which is disposed between the buffer unit (300) and the air inlet (111). The filter aperture of the third filter (112) is smaller than that of the second filter (220).

4. The negative pressure supply device according to claim 1, characterized in that, The first filter (210) is configured as a cyclone separator, and / or the second filter (220) is configured as a precision filter, and / or the buffer unit (300) is configured as a negative pressure buffer tank.

5. The negative pressure supply device according to claim 1, characterized in that, The second filter (220) has two or more connected in parallel.

6. The negative pressure supply device according to claim 1, characterized in that, The first filter (210) is also connected to a non-filtering branch (211) at both ends, and a non-filtering gate valve (212) is provided on the non-filtering branch (211).

7. The negative pressure supply device according to claim 1, characterized in that, The negative pressure supply device is also provided with a sewage discharge pipe (120), which is located between the filter unit (200) and the air inlet (111).

8. The negative pressure supply device according to any one of claims 1-7, characterized in that, The vacuum unit (100) is provided with two or more vacuum units (110), which are connected in parallel to the filter unit (200) and the buffer unit (300) in series.

9. The negative pressure supply device according to any one of claims 1-7, characterized in that, The negative pressure supply device is also provided with a cooling unit (400). The vacuum unit (100) is also provided with a first water inlet (113), a second water inlet (114) and a water outlet (115). The first water inlet (113) is connected to the water supply device (2). The water outlet (115) is connected to the cooling inlet of the cooling unit (400). The cooling outlet of the cooling unit (400) is connected to the second water inlet (114).

10. The negative pressure supply device according to claim 9, characterized in that, The cooling unit (400) includes a cooling tower (410), a working liquid tank (420), and a pump set (430). One end of the cooling tower (410) is connected to the water outlet (115), and the other end is connected to the working liquid tank (420). The pump set (430) is used to pump the working liquid in the working liquid tank (420) into the second water inlet (114). The working liquid tank (420) is also connected to the water supply device (2). The vacuum unit (100) is also provided with a drain outlet (116).

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