CN217511432U - Compressed air filtering structure - Google Patents

Abstract

The utility model relates to a compressed air filtering structure, comprising: a main filtering branch structure, which comprises an air inlet valve, a main filter and an air outlet valve which are connected in sequence through pipelines; the main filter comprises a casing and a The filter element is provided with an air inlet and an air outlet on the shell, and is connected with the air inlet valve and the air outlet valve pipeline respectively through the air inlet and the air outlet. The filter pipeline is connected in parallel with the main filter branch structure, and the temporary filter pipeline is provided with a bypass valve and a temporary filter; the temporary filter pipeline is led out with a nozzle, the nozzle is inserted into the interior of the filter element, and the lower end of the nozzle is closed and extended. Several evenly distributed air jet holes are arranged on the pipe wall of the jet pipe entering into the filter element. The compressed air filtering structure of the utility model has a high degree of automation, can self-clean the main filter, and can continuously provide clean compressed air to the gas-consuming equipment through the temporary filtering pipeline.

Description

A compressed air filter structure

technical field

The utility model relates to the technical field of compressed air filtration, in particular to a compressed air filtration structure.

Background technique

In factories where automation equipment is widely used, compressed air is widely used. Taking cigarette manufacturing enterprises as an example, compressed air is mainly used for the power source of pneumatic units of automation equipment. The cleanliness of compressed air directly affects the performance and service life of precision pneumatic equipment. At present, the existing compressed air filter devices can meet the requirements of use, but the operation and maintenance personnel need to carry out regular cleaning and maintenance work.

Because the compressed air pipeline is mainly made of carbon steel, impurities such as rust are formed after the inner surface of the pipeline is oxidized. The use of compressed air with high impurities is easy to block and damage the precision gas equipment. It is necessary to install a filter device on the compressed air pipeline. If the filter element inside the filter device is used for a long time, it is easy to block, resulting in a large pressure drop, which cannot meet the pressure requirements of the gas-using equipment. The self-cleaning filter device reported so far needs to stop the gas supply to the equipment during self-cleaning, and can continue to supply gas to the gas-consuming equipment after the self-cleaning is completed, which cannot meet the requirement of continuous gas supply.

Utility model content

The purpose of the utility model is to solve the technical problems existing in the prior art, and propose a compressed air filter structure, which can realize the self-cleaning of the filter while satisfying the requirement of continuous air supply.

In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

The utility model provides a compressed air filter structure, comprising:

The main filter branch structure includes an intake valve, a main filter and an air outlet valve that are connected in sequence through pipelines. The main filter includes a casing and a filter element arranged in the casing. The top of the casing is provided with a vertical passage. The shell is provided with an air inlet and an air outlet, and is connected to the air inlet valve and the air outlet valve pipeline respectively through the air inlet and the air outlet, the bottom of the casing is provided with a sewage outlet, and the sewage outlet is connected with a sewage valve. ;

The temporary filter pipeline is connected in parallel with the main filter branch structure, and the temporary filter pipeline is provided with a bypass valve and a temporary filter; the temporary filter pipeline is led out with a nozzle, and the nozzle is inserted into the filter element through the vertical through hole. Inside, the lower end of the nozzle is closed, and the pipe wall of the nozzle extending into the filter element is provided with a number of evenly distributed air injection holes.

Preferably, a partition plate is arranged inside the shell, the partition plate divides the inner space of the shell into an upper chamber and a lower chamber, a connecting through hole is opened on the partition plate, the filter element is cylindrical, and its upper end is open , the lower end is closed, the upper part of the filter element is fixedly connected with the connecting through hole; the air inlet is located in the lower chamber, and the air outlet is located in the upper chamber.

Preferably, a nozzle valve is provided on the nozzle.

Preferably, the main filter is provided with a differential pressure gauge for measuring the differential pressure between the upper chamber and the lower chamber.

Preferably, the intake valve, the exhaust valve, the blowdown valve, the bypass valve and the nozzle valve are all electric valves.

Preferably, the device further includes a controller, and the controller is respectively connected with the electric inlet valve, outlet valve, sewage valve, bypass valve, nozzle valve and differential pressure gauge circuit.

Compared with the prior art, the beneficial effects of the present utility model are:

1. The compressed air filter structure of the present utility model includes a main filter branch structure and a temporary filter pipeline that are connected in parallel with each other. A nozzle is drawn from the temporary filter pipeline. The nozzle is inserted into the interior of the filter element, and cooperates with the intake valve and the exhaust valve. , the opening and closing of the blowdown valve, the electric valve and the nozzle valve, the compressed air sprayed from the nozzle can self-clean the main filter, and at the same time, it can continuously provide clean compressed air to the gas-using equipment through the temporary filter pipeline. Does not affect normal production operations.

2. The compressed air filtration structure of the present utility model receives the signal of the differential pressure gauge through the controller. Once the filter element is blocked, the controller can control the opening and closing of each valve, so as to realize the automatic self-cleaning and main filter of the main filter. The automatic switching between the filter structure and the temporary filter pipeline has a timely response and a high degree of automation, which can meet the pressure requirements of the gas equipment for compressed air.

Description of drawings

Fig. 1 is the schematic diagram of the compressed air filter structure of the present utility model;

Fig. 2 is the enlarged view of A place in Fig. 1;

In the figure: 1. Inlet valve; 2. Outlet valve; 3. Main filter; 301, housing; 302, filter element; 303, air inlet; 304, air outlet; 305, sewage outlet; 306, partition; 307, upper chamber; 308, lower chamber; 309; upper cover; 4, drain valve; 5, temporary filter pipeline; 6, bypass valve; 7, temporary filter; 8, nozzle; 801, jet 9. Nozzle valve; 10. Differential pressure gauge; 11. Compressed air source; 12. Gas equipment.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example.

As shown in FIG. 1 , the compressed air filter structure of the present invention includes a main filter branch structure and a temporary filter pipeline 5 connected in parallel with it. During normal operation, the compressed air flows out from the compressed air source 11 and is filtered by the main filter 3 provided in the main filter branch structure and then supplied to the air-consuming equipment 12; when the main filter 3 performs self-cleaning, the compressed air flows from the compressed air source 11. The outflow is filtered by the temporary filter 7 provided on the temporary filter pipeline 5 and then supplied to the gas consuming equipment 12 , so as to ensure the self-cleaning of the main filter and the continuous air supply to the gas consuming equipment 12 .

The main filter branch structure includes an inlet valve 1, a main filter 3 and an outlet valve 2 connected in sequence through pipelines. The main filter includes a housing 301 and a filter element 302 arranged in the housing 301. The top of the housing 301 is open , and is sealed by the upper cover plate 309, the upper cover plate 309 is provided with vertical through holes, the housing 301 is provided with an air inlet 303 and an air outlet 304, and the air inlet 303 and the air outlet 304 are respectively connected with the The air inlet valve 1 and the air outlet valve 2 are connected by pipeline, the bottom of the casing 301 is provided with a sewage outlet 305 , and the sewage outlet 305 is connected with a sewage discharge valve 4 .

A partition 306 is arranged inside the housing 301, and the partition 306 divides the internal space of the housing 301 into an upper chamber 307 and a lower chamber 308, and a connecting through hole is opened on the partition 306, and the inner wall of the connecting through hole is provided with a internal thread. The filter element 302 is cylindrical, the upper end of which is open and the lower end is closed. The upper part of the filter element 302 is fixedly sleeved with a connecting ring, the outer wall of the connecting ring is provided with an external thread, and the upper part of the filter element 302 is threadedly connected with the connecting through hole through the connecting ring. , most of the filter element 302 and its lower end are located in the lower chamber 9 . The air inlet 303 is located in the lower chamber 308 , and the air outlet 304 is located in the upper chamber 307 .

The temporary filter pipeline 5 is connected in parallel with the main filter branch structure. The temporary filter pipeline 5 is provided with a bypass valve 6 and a temporary filter 7; The vertical through hole and the upper end of the filter element 302 are open and inserted into the interior of the filter element 302, the lower end of the nozzle 8 is closed, and the pipe wall of the nozzle 8 extending into the inside of the filter element 302 is provided with several evenly distributed air injection holes 801. , the compressed air is ejected from the air injection hole 801, which can clean the filter element 302. A nozzle valve 9 is provided on the nozzle 8, and the intermittent opening and closing of the nozzle valve 9 can improve the cleaning effect of the filter element. The nozzle pipe 8 is preferably a hard pipe with a smaller diameter, which can ensure a large flow rate of the gas ejected from the nozzle pipe 8 .

Further, the main filter is provided with a differential pressure gauge 10, the differential pressure gauge 10 has two pressure measuring probes, the two pressure measuring probes are respectively drawn from the upper chamber 307 and the lower chamber 308, and the differential pressure gauge 10 It is used to measure the pressure difference between the upper chamber 307 and the lower chamber 308, so as to determine whether the filter element 302 is blocked. When the filter element 302 is blocked, the pressure difference between the upper chamber 307 and the lower chamber 308 will increase. .

Further, in order to realize the automatic control of the device, the device also includes a controller, the controller is a single-chip controller, and the controller is respectively connected with the electric inlet valve 1, the electric outlet valve 2, the electric blowdown valve 6, the bypass electric valve 13, The electric valve 17 is connected to the differential pressure gauge 18, and the intake valve 1, the exhaust valve 2, the drain valve 4, the bypass valve 6 and the nozzle valve 9 are all electric valves.

When in use, the controller collects and processes the differential pressure signal obtained by the differential pressure gauge 10. When the differential pressure value of the differential pressure gauge 10 exceeds the set threshold for a period of time, the filter element 302 is blocked and needs to be cleaned. At this time, the controller controls the intake valve 1 and the exhaust valve 2 to close, the bypass valve 6 and the blowdown valve 4 to open, the nozzle valve 9 is continuously opened and closed, and the compressed air is intermittently ejected from the injection hole 801 on the nozzle 8 , blowing off the impurities adhering to the side wall of the filter element 302 , and the impurities are discharged from the accompanying air flow through the sewage outlet 305 to the outside of the main filter 3 . While the main filter 3 is self-cleaning, the compressed air can be continuously filtered from the compressed air source 11 through the temporary filter 7 in the temporary filter pipeline 5 to supply air to the gas consuming equipment 12 .

The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Equivalent replacement or modification of the technical solution and its utility model concept shall be included within the protection scope of the present utility model.

Claims (6)

1. a compressed air filter structure, is characterized in that, comprises: The main filter branch structure includes an intake valve (1), a main filter (3) and an air outlet valve (2) connected in sequence through pipelines, the main filter includes a housing (301) and a main filter provided in the housing (301) ) inside the filter element (302), the top of the casing (301) is provided with a vertical through hole, and the casing (301) is provided with an air inlet (303) and an air outlet (304) and passes through the air inlet (301). The port (303) and the air outlet (304) are respectively connected with the air inlet valve (1) and the air outlet valve (2) pipelines, and the bottom of the casing (301) is provided with a sewage outlet (305), which is connected to the sewage outlet (305). There is a drain valve (4); The temporary filter pipeline (5) is connected in parallel with the main filter branch structure, and the temporary filter pipeline (5) is provided with a bypass valve (6) and a temporary filter (7); the temporary filter pipeline (5) leads out There is a nozzle (8), the nozzle (8) is inserted into the interior of the filter element (302) through the vertical through hole, the lower end of the nozzle (8) is closed, and extends into the nozzle (8) inside the filter element (302). ) is provided with several evenly distributed air jet holes (801). 2 . The compressed air filter structure according to claim 1 , wherein a partition plate ( 306 ) is arranged inside the casing ( 301 ), and the partition plate ( 306 ) divides the internal space of the casing ( 301 ) into The upper chamber (307) and the lower chamber (308) are provided with connecting through holes on the partition plate (306). The filter element (302) is cylindrical with an open upper end and a closed lower end. The connecting through holes are fixedly connected; the air inlet (303) is located in the lower chamber (308), and the air outlet (304) is located in the upper chamber (307). 3. The compressed air filter structure according to claim 1, characterized in that, a nozzle valve (9) is provided on the nozzle (8). 4. The compressed air filtration structure according to claim 3, characterized in that, a differential pressure gauge (10) is provided on the main filter for measuring the difference between the upper chamber (307) and the lower chamber (308) pressure difference between. 5. The compressed air filter structure according to claim 4, characterized in that the intake valve (1), the air outlet valve (2), the drain valve (4), the bypass valve (6) and the nozzle valve ( 9) All are electric valves. 6 . The compressed air filtering structure according to claim 5 , further comprising a controller, the controller is connected to the electrical inlet valve ( 1 ), the outlet valve ( 2 ), and the drain valve ( 4 ) respectively. 7 . , Bypass valve (6), nozzle valve (9) and differential pressure gauge (10) line connection.

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