Compressed air drying filter

Abstract

The utility model relates to a compressed air drying filter, which belongs to the technical field of filters and comprises a first three-way valve, a pre-filtering box, an upper shell, a drying filter element, a lower shell and a second three-way valve. Limiting trays are fixedly mounted on the inner walls of the pre-filtering boxes, primary filtering plates are mounted on the inner walls of the limiting trays through screws, the pre-filtering boxes on the two sides are communicated with the upper shell through pipelines, a partition plate is fixedly mounted on the inner wall of the upper shell, and the upper shell is divided into an air inlet cavity and an exhaust cavity through the partition plate. According to the utility model, the double filter channels are arranged, and when one group is damaged, the filter element is aged and fails, and maintenance and drainage are needed, the other standby filter channel can be started to dry and filter compressed air, so that the problem that production is influenced by maintenance, aging and blockage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of filters, in particular to a compressed air drying filter. Background Art

[0002] Compressed air filter dryers are essential filtering equipment for improving the quality of gas used in factory or laboratory instruments. Compressed air can produce a coalescence effect when passing through a precision filter element. Larger particles will be adsorbed on the filter material, and the water will condense into larger droplets. The water carrying the impurity particles will flow along the bottom to the drainage device and be discharged through an automatic or electric drain valve, thereby improving the quality of the compressed air.

[0003] After searching, the existing Chinese patent with publication number CN216418867U discloses a compressed air drying filter, wherein a plurality of eccentric centrifugal holes are provided on the valve core, and when the high-speed water-carrying air enters the valve core from the air inlet, the air inside the valve core is squeezed and discharged from the eccentric centrifugal holes. Since the centrifugal holes are eccentrically arranged and the diffusion part of the centrifugal holes is funnel-shaped, the water-carrying air is squeezed from the centrifugal holes along the guide part to enter the diffusion part, forming an instantaneous rotational motion, and the water-carrying air generates centrifugal force, and is separated into water and dry air under the action of the centrifugal force and enters the separation duct. Under the action of gravity, the separated water flows into the water collecting chamber along the inner wall of the separation duct, and is then discharged through the automatic drainer externally connected to the bottom cover, while the water-free dry air enters the drying chamber through the gap between the separation ring and the outer wall of the separation duct under the action of the pressure difference, and then the water-free dry air is transported to the required equipment through the air outlet for use, thereby achieving the function of filtering the water in the compressed air.

[0004] The above technical solution has the following defects. Although such a compressed air drying filter structure can separate and filter water, oil, impurities, etc. through the filter element to improve the quality of compressed air, in actual use, when the filter element is repaired, replaced or drained, the drying filter loses its filtering ability, affecting production. In order to ensure stable production and facilitate maintenance, a compressed air drying filter is proposed, which is provided with double filtering channels. When one group is damaged, the filter element is aged and fails, and maintenance and drainage are required, the other spare filtering channel can be activated to dry and filter the compressed air, thereby preventing the problem of maintenance, aging and blockage affecting production.

[0005] In view of this, the author improves and solves the above problems, concentrates on research and cooperates with theoretical application, and finally proposes a technical solution with reasonable design and effective improvement of the above defects.

[0006] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] The utility model provides a compressed air drying filter, which solves the problem raised in the above background. It is provided with double filtering channels. When one group is damaged, the filter element is aged and fails, and maintenance and drainage are required, the other spare filtering channel can be activated to perform compressed air drying and filtering, thereby preventing the problem of maintenance, aging and clogging affecting production.

[0008] The utility model solves the above technical problems as follows: a compressed air drying filter comprises a No. 1 three-way valve, a pre-filter box, an upper shell, a drying filter element, a lower shell, and a No. 2 three-way valve, the No. 1 three-way valve is fixedly connected with an air inlet pipe, both ends of the No. 1 three-way valve are connected with the pre-filter box through a pipeline, a limiting tray is fixedly installed on the inner wall of the pre-filter box, a primary filter plate is installed on the inner wall of the limiting tray by screws, the pre-filter boxes on both sides are connected with the upper shell through pipelines, a partition plate is fixedly installed on the inner wall of the upper shell, the upper shell is separated into an air inlet cavity and an exhaust cavity by the partition plate, a load-bearing bracket is fixedly installed on the inner wall of the lower shell, the drying filter element is threadedly connected to the load-bearing bracket, the bottom of the lower shell is fixedly connected with a drain valve, both sides of the upper shell are fixedly connected with air outlet pipes, the air outlet pipes on both sides are connected with the No. 2 three-way valve, and the bottom of the No. 2 three-way valve is fixedly connected with an exhaust pipe.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the partition plate is provided with a dry filter element insertion hole, and a sealing rubber ring is fixedly installed on the inner wall of the insertion hole, so that the compressed air can be discharged from the air inlet cavity into the exhaust cavity through the dry filter element, and the dry filter element can perform dry filtration on the compressed air.

[0011] Furthermore, a sealing door is provided on the front surface of the pre-filter box, which can be opened to remove the primary filter plate for cleaning and replacement.

[0012] Furthermore, the upper shell and the lower shell can be connected by bolts, and the connection is sealed by a sealing rubber ring, and the upper shell and the lower shell can be disassembled by removing the bolts.

[0013] Furthermore, the load-bearing bracket is provided with a screw groove, and the outer wall of the dry filter element is provided with a connecting thread, so that the dry filter element is easy to take out and put in from the lower shell.

[0014] Furthermore, the air inlet end of the dry filter element is placed in the air inlet cavity through the partition plate, so that the compressed air can be discharged from the air inlet cavity through the dry filter element into the exhaust cavity, and the dry filter element can perform dry filtration processing on the compressed air.

[0015] Furthermore, the outer wall of the load-bearing bracket is evenly provided with connecting rods, and is fixedly connected to the inner wall of the lower outer shell through the connecting rods, so that water droplets filtered by the compressed air can flow along the inner wall of the lower outer shell through the gaps in the connecting rods of the load-bearing bracket to the bottom, and can be discharged by opening the drain valve.

[0016] The utility model provides a compressed air drying filter, which has the following advantages:

[0017] 1. Compressed air can be transmitted to the pre-filter box on one side through the No. 1 three-way valve. The primary filter plate in the limit tray can perform primary filtration on large particle impurities in the compressed air to prevent them from clogging the dry filter element with fine filter holes and affecting the dry filtration effect;

[0018] 2. When the filter element on one side has been used for a long time and needs to be cleaned or fails, the No. 1 three-way valve and the No. 2 three-way valve can be started to enable the filter channel on the other end to dry and filter the compressed air;

[0019] 3. Open the sealed door of the pre-filter box to take out the primary filter plate from the limiting tray for disassembly and replacement. Remove the bolts connecting the upper shell and the lower shell to remove the lower shell. Rotate and separate the dry filter element and the load-bearing bracket to take out the dry filter element from the lower shell for cleaning, maintenance or replacement.

[0020] 4. Such a compressed air drying filter is equipped with dual filtering channels. When one set of filtering channels is damaged, the filter element is aged and fails, and needs to be repaired and drained, the other spare filtering channel can be activated for compressed air drying and filtering, thereby preventing problems such as maintenance, aging and blockage from affecting production.

[0021] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiment of the utility model with the accompanying drawings. The specific implementation method of the utility model is given in detail by the following embodiments and their drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1A schematic structural diagram of a compressed air drying filter provided in one embodiment of the utility model;

[0024] Figure 2 A front view of a compressed air drying filter provided by an embodiment of the utility model;

[0025] Figure 3 A structural schematic diagram of a load-bearing bracket in a compressed air drying filter provided by an embodiment of the utility model;

[0026] Figure 4 The present invention is a schematic structural diagram of an upper shell and an inner wall of a lower shell in a compressed air drying filter provided in one embodiment of the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Three-way valve No. 1; 2. Air inlet pipe; 3. Pre-filter box; 4. Limit tray; 5. Primary filter plate; 6. Sealing door; 7. Upper housing; 8. Partition plate; 9. Dry filter element; 10. Lower housing; 11. Load-bearing bracket; 12. Drain valve; 13. Air outlet pipe; 14. Three-way valve No. 2; 15. Exhaust pipe; 16. Air inlet cavity; 17. Exhaust cavity. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 The principles and features of the present invention are described, and the examples given are only used to explain the present invention, and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] like Figure 1-4 As shown, a compressed air drying filter comprises a No. 1 three-way valve 1, a pre-filter box 3, an upper shell 7, a drying filter element 9, a lower shell 10, and a No. 2 three-way valve 14. The No. 1 three-way valve 1 is fixedly connected with an air inlet pipe 2, and both ends of the No. 1 three-way valve 1 are connected with the pre-filter box 3 through a pipeline. A limited tray 4 is fixedly installed on the inner wall of the pre-filter box 3, and a primary filter plate 5 is installed on the inner wall of the limited tray 4 through screws. The pre-filter boxes 3 on both sides are connected with the upper shell 7 through pipelines. A partition plate 8 is fixedly installed on the inner wall of the outer shell 7, and the upper outer shell 7 is divided into an air inlet chamber 16 and an exhaust chamber 17 by the partition plate 8. A load-bearing bracket 11 is fixedly installed on the inner wall of the lower outer shell 10, and the drying filter element 9 is threadedly connected to the load-bearing bracket 11. The bottom of the lower outer shell 10 is fixedly connected to a drain valve 12, and both sides of the upper outer shell 7 are fixedly connected to an air outlet pipe 13, and the air outlet pipes 13 on both sides are connected to the No. 2 three-way valve 14, and the bottom of the No. 2 three-way valve 14 is fixedly connected to an exhaust pipe 15.

[0033] Preferably, the partition plate 8 is provided with a hole for inserting the dry filter element 9, and a sealing rubber ring is fixedly installed on the inner wall of the insertion hole, so that the compressed air can be discharged from the air inlet cavity 16 into the exhaust cavity 17 through the dry filter element 9, and the dry filter element 9 can perform dry filtering treatment on the compressed air.

[0034] Preferably, a sealing door 6 is provided on the front surface of the pre-filter box 3, which can be opened to remove the primary filter plate 5 for cleaning and replacement.

[0035] Preferably, the upper housing 7 and the lower housing 10 can be connected by bolts, and the connection is sealed by a sealing rubber ring, and the upper housing 7 and the lower housing 10 can be disassembled by removing the bolts.

[0036] Preferably, the load-bearing bracket 11 is provided with a screw groove, and the outer wall of the dry filter element 9 is provided with a connecting thread, so that the dry filter element 9 is easy to take out and put in from the lower housing 10.

[0037] Preferably, the air inlet end of the dry filter element 9 is placed in the air inlet cavity 16 through the partition plate 8, so that the compressed air can be discharged from the air inlet cavity 16 through the dry filter element 9 into the exhaust cavity 17, and the dry filter element 9 can perform dry filtering on the compressed air.

[0038] Preferably, the outer wall of the load-bearing bracket 11 is evenly provided with connecting rods, and is fixedly connected to the inner wall of the lower outer shell 10 through the connecting rods, so that water droplets filtered by the compressed air can flow along the inner wall of the lower outer shell 10 through the gaps in the connecting rods of the load-bearing bracket 11 to the bottom, and can be discharged by opening the drain valve 12.

[0039] The specific working principle and use method of the utility model are as follows: compressed air can be transmitted to the pre-filter box 3 on one side through the No. 1 three-way valve 1, and the primary filter plate 5 in the limit tray 4 can perform primary filtration on large particle impurities in the compressed air to prevent them from clogging the filter element 9 with fine filter holes and affecting the dry filtering effect. The compressed air after the primary filtration can be transmitted from the air inlet cavity 16 of the upper housing 7 through the top air inlet of the filter element 9 of the dry filter, and the filter element 9 of the dry filter can filter tiny solid particles, water and oil in the compressed air. The filtered compressed air can be transmitted from the exhaust cavity 17 through the outlet pipe 13 to the No. 2 three-way valve 14, and discharged through the bottom exhaust pipe 15. The water carrying the impurity particles flows to the bottom along the inner wall of the lower shell 10 and can be discharged by opening the drain valve 12 during maintenance. When the filter element on one side has been used for a long time and needs to be cleaned or fails, the No. 1 three-way valve 1 and the No. 2 three-way valve 14 can be started to enable the filter channel at the other end to dry and filter the compressed air. The sealing door 6 of the pre-filter box 3 can be opened to take out the primary filter plate 5 from the limiting tray 4 for disassembly and replacement. The lower shell 10 can be removed by removing the bolts connecting the upper shell 7 and the lower shell 10. The dry filter element 9 and the load-bearing bracket 11 can be rotated to separate the dry filter element 9 and the load-bearing bracket 11 to take out the dry filter element 9 from the lower shell 10 for cleaning, maintenance or replacement.

[0040] The above description is only a preferred embodiment of the utility model and does not impose any form of limitation on the utility model. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A compressed air drying filter, comprising a No. 1 three-way valve (1), a pre-filter box (3), an upper housing (7), a drying filter element (9), a lower housing (10), and a No. 2 three-way valve (14), characterized in that: The No. 1 three-way valve (1) is fixedly connected to an air inlet pipe (2), and both ends of the No. 1 three-way valve (1) are connected to a pre-filter box (3) through a pipeline. A limit tray (4) is fixedly installed on the inner wall of the pre-filter box (3), and a primary filter plate (5) is installed on the inner wall of the limit tray (4) through screws. The pre-filter boxes (3) on both sides are connected to an upper shell (7) through a pipeline, and a partition plate (8) is fixedly installed on the inner wall of the upper shell (7). The upper shell (7) is separated by the partition plate (8). There are an air inlet cavity (16) and an air exhaust cavity (17); a load-bearing bracket (11) is fixedly mounted on the inner wall of the lower housing (10); the filter element of the drying filter (9) is threadedly connected to the load-bearing bracket (11); a drain valve (12) is fixedly connected to the bottom of the lower housing (10); both sides of the upper housing (7) are fixedly connected to air outlet pipes (13); the air outlet pipes (13) on both sides are connected to a No. 2 three-way valve (14); and the bottom of the No. 2 three-way valve (14) is fixedly connected to an exhaust pipe (15).

2. A compressed air drying filter according to claim 1, characterized in that: The partition plate (8) is provided with a hole for inserting the filter element of the drying filter (9), and a sealing rubber ring is fixedly installed on the inner wall of the insertion hole.

3. A compressed air drying filter according to claim 1, characterized in that: A sealing door (6) is provided on the front surface of the pre-filter box (3).

4. A compressed air drying filter according to claim 1, characterized in that: The upper housing (7) and the lower housing (10) can be connected by bolts, and the connection is sealed by a sealing rubber ring.

5. A compressed air drying filter according to claim 1, characterized in that: The load-bearing bracket (11) is provided with a screw groove, and the outer wall of the drying filter element (9) is provided with a connecting thread.

6. A compressed air drying filter according to claim 1, characterized in that: The air inlet end of the filter element (9) of the drying filter passes through the partition plate (8) and is placed in the air inlet cavity (16).

7. A compressed air drying filter according to claim 1, characterized in that: The outer wall of the load-bearing bracket (11) is evenly provided with connecting rods, and is fixedly connected to the inner wall of the lower shell (10) via the connecting rods.

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