Bag-in and bag-out filtering device of vacuum system

Abstract

The utility model discloses a bag-in and bag-out filtering device of a vacuum system, which belongs to the technical field of filtering devices and comprises a medium-efficiency filter, a high-efficiency filter and a support, the medium-efficiency filter and the high-efficiency filter are fixedly mounted on the support and are connected through a pipeline, and the middle-efficiency filter is connected with the high-efficiency filter through a pipeline. An inlet is formed in the left side of the medium-efficiency filter, an outlet is formed in the right side of the high-efficiency filter, a filter element is installed in the medium-efficiency filter, a pulse back-flushing pipe is installed in the filter element, a pulse back-flushing valve is installed on the medium-efficiency filter, one end of the pulse back-flushing valve is communicated with the pulse back-flushing pipe, and the other end of the pulse back-flushing valve is communicated with an air storage tank. The filter element is replaced and dust is collected in a bag-in and bag-out mode, dust leakage in the operation process is avoided, the safety of operators and the surrounding environment is protected, and meanwhile the bag-in and bag-out type dust collector is suitable for a high-vacuum-degree vacuum system.

Description

Technical Field

[0001] This utility model belongs to the field of filtration device technology, specifically relating to a vacuum system bag inlet and bag outlet filtration device. Background Technology

[0002] Dust typically refers to particles generated during mechanical processes such as crushing, screening, and conveying in the processing of solid materials, or during processes such as combustion, high-temperature melting, and chemical reactions. These processes frequently release various types of industrial dust, which can damage the workshop air environment, harm the health of operators, damage workshop machinery and equipment, and pollute the atmosphere, causing public harm. Therefore, dust needs to be filtered before it is emitted, and filter elements need to be replaced frequently when using filtration devices. However, existing filtration devices replace filter elements by directly opening the filter sealing door. In addition, the dust collected on the filter is blown off into a dust collection bin by compressed air backflushing, and then manually cleaned. This process must ensure that the dust is harmless to the human body. For materials containing toxicity, directly replacing the filter element can lead to contact with toxic materials, thus affecting personnel safety. At the same time, existing filters are generally connected to a fan at the back end, and the vacuum level that the fan can generate is generally no higher than -50 kPa. Such filters are not suitable for high-vacuum systems such as screw vacuum pumps and rotary vane vacuum pumps. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a vacuum system bag-in-bag-out filtration device. By using a bag-in-bag-out method to replace the filter element and collect dust, dust leakage during operation is prevented, thereby protecting the safety of operators and the surrounding environment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a vacuum system bag-in-bag-out filtration device, comprising a medium-efficiency filter, a high-efficiency filter, and a support. The medium-efficiency filter and the high-efficiency filter are fixedly installed on the support and connected by a pipe. The medium-efficiency filter has an inlet on its left side and the high-efficiency filter has an outlet on its right side. A filter element is installed inside the medium-efficiency filter, and a pulse backflush pipe is installed inside the filter element. A pulse backflush valve is installed on the medium-efficiency filter, with one end of the pulse backflush valve connected to the pulse backflush pipe and the other end connected to the gas storage tank.

[0005] Preferably, a cone-shaped hopper is provided below the medium-efficiency filter, a valve is installed below the cone-shaped hopper, and a dust collection port is installed below the valve.

[0006] Preferably, the filter port of the medium-efficiency filter is fitted with a cover plate by fixing bolts.

[0007] Preferably, the medium-efficiency filter is equipped with a medium-efficiency differential pressure sensor, and the high-efficiency filter is equipped with a high-efficiency differential pressure sensor. The medium-efficiency differential pressure sensor is connected to the pipes on both sides of the medium-efficiency filter through a medium-efficiency differential pressure inlet pipe and a medium-efficiency differential pressure outlet pipe, and the high-efficiency differential pressure sensor is connected to the pipes on both sides of the high-efficiency filter through a high-efficiency differential pressure inlet pipe and a high-efficiency differential pressure outlet pipe.

[0008] Preferably, when replacing the filter element, cover the filter opening with a PE bag, use an O-ring to seal the PE bag, loosen the cover plate fixing bolts on the cover plate, remove the cover plate, loosen the filter element fixing bolts, remove the filter element, use a cable tie to tie the middle part of the PE bag tightly, divide the PE bag into two parts, use scissors to cut from the middle of the cable tie to separate the PE bags, put the new filter element into the new PE bag, then put the whole bag over the outside of the old PE bag, remove the old PE bag from the new PE bag, install the new filter element into the filter cartridge, install the filter element fixing bolts to fix the filter element, close the cover plate and install and tighten the cover plate fixing bolts to complete the filter element replacement.

[0009] Compared with the prior art, the present invention has the following advantages:

[0010] This invention uses compressed air pulse backflushing for dust removal, enabling the filter to be used continuously without clogging too quickly. By using a bag-in-bag-out method to replace the filter element and collect dust, dust leakage during operation is prevented, thus protecting the safety of operators and the surrounding environment. This invention is also suitable for high-vacuum systems. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of the vacuum system bag inlet and bag outlet filter device of this utility model;

[0012] Figure 2 This is a cross-sectional view of the internal structure of the vacuum system bag inlet and bag outlet filter device of this utility model;

[0013] Figure 3 This is a schematic diagram of the differential pressure detection structure of the vacuum system bag inlet and bag outlet filter device of this utility model;

[0014] Figure 4 This is a flowchart illustrating the filter element replacement process for the vacuum system bag inlet / outlet filtration device of this utility model.

[0015] In the diagram: 1. Medium-efficiency filter; 2. High-efficiency filter; 3. Support bracket; 4. Medium-efficiency differential pressure sensor; 5. High-efficiency differential pressure sensor; 6. Valve; 101. Inlet; 102. Outlet; 103. Dust collection port; 201. Pulse backflush valve; 202. Air tank; 203. PE bag a; 204. PE bag b; 205. Medium-efficiency filter element; 206. Dust; 207. Pulse backflush pipe; 208. Conical hopper; 210. O-ring a; 301. High-efficiency differential pressure inlet pipe; 302. High-efficiency differential pressure exhaust pipe; 303. Medium-efficiency differential pressure exhaust pipe; 304. Medium-efficiency differential pressure inlet pipe; 401. Filter element fixing bolt; 402. Cover plate fixing bolt; 403. Cover plate; 404. O-ring b; 406. Cable tie; 407. New PE bag; 408. New filter element. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0018] This utility model provides, for example Figure 1-4 The vacuum system bag inlet and bag outlet filtration device shown includes a medium-efficiency filter (1), a high-efficiency filter (2), and a bracket (3). The medium-efficiency filter (1) and the high-efficiency filter (2) are fixedly installed on the bracket (3). The medium-efficiency filter (1) and the high-efficiency filter (2) are connected by a pipe. The medium-efficiency filter (1) has an inlet (101) on its left side and the high-efficiency filter (2) has an outlet (102) on its right side. The medium-efficiency filter (1) has a filter element (205) installed inside. The filter element (205) has a pulse backflush pipe (207) installed inside. The medium-efficiency filter (1) has a pulse backflush valve (201) installed on it. One end of the pulse backflush valve (201) is connected to the pulse backflush pipe (207), and the other end is connected to the air storage tank (202).

[0019] The medium-efficiency filter (1) is provided with a cone hopper below it, a valve (6) is installed below the cone hopper, and a dust collection port (103) is installed below the valve.

[0020] The filter port of the medium-efficiency filter (1) is fitted with a cover plate (403) by fixing bolts (402).

[0021] The medium-efficiency filter (1) is equipped with a medium-efficiency differential pressure sensor (4), and the high-efficiency filter (2) is equipped with a high-efficiency differential pressure sensor (5). The medium-efficiency differential pressure sensor (4) is connected to the pipes on both sides of the medium-efficiency filter (1) through the medium-efficiency differential pressure inlet pipe (304) and the medium-efficiency differential pressure outlet pipe (303). The high-efficiency differential pressure sensor (5) is connected to the pipes on both sides of the high-efficiency filter (2) through the high-efficiency differential pressure inlet pipe (301) and the high-efficiency differential pressure outlet pipe (302).

[0022] When replacing the filter element (205), cover the filter opening with the PE bag a (203), use the O-ring b (404) to tighten and seal the PE bag a (203), loosen the cover plate fixing bolts (402) on the cover plate (403), remove the cover plate (403), then loosen the filter element fixing bolts (401), remove the filter element (205), use the cable tie (406) to tighten the middle part of the PE bag a (203), divide the PE bag a (203) into two parts, and use scissors to cut... Cut the cable tie (406) in the middle to separate the PE bag a (203). Put the new filter element (408) into the new PE bag (407), and then put the whole bag over the outside of the old PE bag a (203). Remove the old PE bag a (203) from the new PE bag (407). Put the new filter element (408) into the filter cartridge, and put the filter element fixing bolt (401) in to fix the filter element (408). Cover the cover plate (403) and put the cover plate fixing bolt (402) in and tighten it to complete the replacement of the filter element.

[0023] Working principle:

[0024] During work, as attached Figure 1 As shown, the dust to be processed enters the medium-efficiency filter (1) through the inlet (101), and after being filtered by the medium-efficiency filter (1), it enters the high-efficiency filter (2). After passing through two stages of filtration, it enters the vacuum system through the outlet (102). The medium-efficiency filter (1) is dusted by compressed air pulse backflushing, so that the filter can be used continuously and will not become clogged too quickly. The bottom cone (208) of the medium-efficiency filter (1) is connected to a valve (6). When the dust is collected to a certain amount, the valve needs to be opened to clean the dust. Figure 2 As shown, PE bag b (204) is placed on the dust collection port (103), and the outside of PE bag b (204) is sealed with O-ring a (210). Then, the valve (6) is opened, and dust (206) falls from the cone hopper (208) into PE bag b (204). After dust collection is completed, the valve (6) is closed.

[0025] like Figure 3As shown, the medium-efficiency filter (1) and the high-efficiency filter (2) are detected by the medium-efficiency differential pressure sensor (4) and the high-efficiency differential pressure sensor (5), respectively. When the differential pressure of the medium-efficiency filter reaches the set value, the compressed air pulse backflushing is started, so that the filter can restore its filtering capacity and continue to be used.

[0026] like Figure 4 As shown, when replacing the filter element (205), cover the filter opening with the PE bag a (203), use the O-ring b (404) to tighten and seal the PE bag a (203), loosen the cover plate fixing bolt (402) on the cover plate (403), remove the cover plate (403), then loosen the filter element fixing bolt (401), remove the filter element (205), use the cable tie (406) to tie the middle part of the PE bag a (203), divide the PE bag a (203) into two parts, and use scissors to cut the cable tie. Cut the belt (406) in the middle to separate the PE bag a (203). Put the new filter element (408) into the new PE bag (407), and then put the whole bag over the outside of the old PE bag a (203). Remove the old PE bag a (203) from the new PE bag (407). Put the new filter element (408) into the filter cartridge, and put the filter element fixing bolt (401) in to fix the filter element (408). Cover the cover plate (403) and put the cover plate fixing bolt (402) in and tighten it to complete the replacement of the filter element.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A vacuum system bag-in-bag-out filtration device, comprising a medium-efficiency filter (1), a high-efficiency filter (2), and a support (3), characterized in that: The medium-efficiency filter (1) and the high-efficiency filter (2) are fixedly installed on the bracket (3). The medium-efficiency filter (1) and the high-efficiency filter (2) are connected by a pipe. The medium-efficiency filter (1) has an inlet (101) on its left side and the high-efficiency filter (2) has an outlet (102) on its right side. The medium-efficiency filter (1) has a filter element (205) installed inside. The filter element (205) has a pulse backflush pipe (207) installed inside. The medium-efficiency filter (1) has a pulse backflush valve (201) installed on it. One end of the pulse backflush valve (201) is connected to the pulse backflush pipe (207), and the other end is connected to the gas storage tank (202).

2. The vacuum system bag-in / bag-out filtration device according to claim 1, characterized in that: The medium-efficiency filter (1) is provided with a cone hopper below it, and a valve (6) is installed below the cone hopper. A dust collection port (103) is installed below the valve.

3. The vacuum system bag-in / bag-out filtration device according to claim 1, characterized in that: The filter port of the medium-efficiency filter (1) is fitted with a cover plate (403) by fixing bolts (402).

4. A vacuum system bag-in / bag-out filtration device according to claim 1, characterized in that: The medium-efficiency filter (1) is equipped with a medium-efficiency differential pressure sensor (4), and the high-efficiency filter (2) is equipped with a high-efficiency differential pressure sensor (5). The medium-efficiency differential pressure sensor (4) is connected to the pipes on both sides of the medium-efficiency filter (1) through the medium-efficiency differential pressure inlet pipe (304) and the medium-efficiency differential pressure outlet pipe (303). The high-efficiency differential pressure sensor (5) is connected to the pipes on both sides of the high-efficiency filter (2) through the high-efficiency differential pressure inlet pipe (301) and the high-efficiency differential pressure outlet pipe (302).

5. A vacuum system bag-in / bag-out filtration device according to claim 1, characterized in that: When replacing the filter element (205), cover the filter opening with the PE bag a (203), use the O-ring b (404) to tighten and seal the PE bag a (203), loosen the cover plate fixing bolt (402) on the cover plate (403), remove the cover plate (403), then loosen the filter element fixing bolt (401), remove the filter element (205), use the cable tie (406) to tie the middle part of the PE bag a (203) tightly, divide the PE bag a (203) into two parts, and use scissors to cut through the cable tie. (406) Cut in the middle to separate PE bag a (203), put the new filter element (408) into the new PE bag (407), and then put the whole bag over the outside of the old PE bag a (203). Remove the old PE bag a (203) from the new PE bag (407), put the new filter element (408) into the filter cartridge, put the filter element fixing bolt (401) into the cartridge to fix the new filter element (408), put the cover plate (403) on, and put the cover plate fixing bolt (402) in and tighten it to complete the replacement of the filter element.

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