Quick dismounting type filter core replacing device of screw air compressor

Abstract

The utility model relates to air compressor technology field especially, it relates to a kind of screw air compressor quick disassembly and assembly type filter core replacement device, solve the existing technology when filter core is blocked or reach replacement period, operator has to first close equipment, pressure relief, then using wrench, sleeve etc. Tool is removed multiple fixed bolts one by one, even need to disassemble intake pipeline or protective cover shell as a whole, can take out old filter core and install new piece, this process not only time-consuming and labor-consuming, and in narrow space operation is extremely inconvenient. A kind of screw air compressor quick disassembly and assembly type filter core replacement device, including screw air compressor body, the side of screw air compressor body is connected with intake pipe, and the inside of intake pipe is slidably connected with filter core. The utility model effectively avoids the problem such as thread silk, flange deformation or sealing pad aging caused by repeatedly tightening bolt, not only significantly reduces artificial labor intensity and maintenance cost, also improves equipment availability and operation safety.

Description

Technical Field

[0001] This utility model relates to the field of air compressor technology, and in particular to a quick-release filter replacement device for screw air compressors. Background Technology

[0002] A screw air compressor is a positive displacement compressor that uses a pair of meshing male and female rotors rotating at high speed within a casing to continuously draw in, compress, and discharge gas. It is widely used in industries such as machinery manufacturing, chemicals, textiles, automotive repair, food processing, and medicine, serving as a core power source for providing stable and clean compressed air. During operation, to prevent impurities such as dust, oil mist, and moisture from entering the compressor housing and causing rotor wear, cooler blockage, or lubricating oil deterioration, an air filter (also known as an intake filter) must be installed at the screw air compressor's inlet. This filter acts as the first line of defense in the compressed air system; its filtration efficiency and ease of replacement directly affect the overall machine's operational stability, energy consumption, and service life.

[0003] Existing technologies typically embed the filter element directly inside the intake pipe and rigidly connect it to the main unit's intake port via flanges, bolts, or clamps. When the filter element becomes clogged or reaches its replacement cycle, operators must first shut down the equipment, depressurize, and then use wrenches, sockets, and other tools to remove multiple fixing bolts one by one. In some cases, the entire intake pipe or protective cover may need to be disassembled to remove the old filter element and install the new one. This process is not only time-consuming and labor-intensive but also extremely inconvenient to operate in confined spaces, and improper force can easily cause thread stripping or damage to the sealing surface. Therefore, to address the numerous shortcomings of existing screw air compressor filter element replacement technologies, such as cumbersome replacement process, the need for complete disassembly of the intake pipe, poor sealing reliability, and low maintenance efficiency, we urgently need an innovative screw air compressor quick-release filter element replacement device to solve these problems. Utility Model Content

[0004] The purpose of this invention is to provide a quick-release filter replacement device for screw air compressors, which solves the problem in the prior art where, when the filter is clogged or reaches its replacement cycle, operators have to first shut down the equipment and depressurize it, then use wrenches, sockets and other tools to remove multiple fixing bolts one by one, or even disassemble the entire intake pipe or protective cover, in order to remove the old filter and install the new one. This process is not only time-consuming and labor-intensive, but also extremely inconvenient to operate in a confined space.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A quick-release filter replacement device for a screw air compressor includes a screw air compressor body. An air inlet pipe is connected to one side of the screw air compressor body, and a filter element is slidably connected to the inner side of the air inlet pipe. A connecting pipe is fixedly connected to the lower inner side of the air inlet pipe, and an annular sealing groove is provided at the top of the connecting pipe. An annular sealing plate is provided inside the annular sealing groove. The top of the annular sealing plate is fixedly connected to the bottom of the filter element. A support frame is fixedly connected to the upper part of the air inlet pipe, and a bearing plate is provided at the top of the air inlet pipe. An air inlet filter plate is fixedly connected to the top of the bearing plate. Both sides of the bearing plate are slidably connected to the inner wall of the support frame.

[0006] Preferably, sliding blocks are fixedly connected to both sides of the filter element, and both sliding blocks are slidably connected to the inner wall of the air intake pipe through sliding grooves.

[0007] Preferably, sliders are fixedly connected to both sides of the bearing plate, and both sliders are slidably connected to the inner wall of the support frame through a groove.

[0008] Preferably, the support frame is provided with support rods on both sides, and one end of each support rod passes through the side wall of the support frame and the two sliders in sequence.

[0009] Preferably, a tension spring is fitted on one end of each of the two support rods, and one end of the support rod is elastically connected to the side wall of the support frame through the tension spring.

[0010] Preferably, a threaded rod is provided on one side of the intake pipe, and one end of the threaded rod passes through the side wall of the intake pipe and the side wall of the connecting pipe and one side of the annular sealing plate in sequence through the threaded groove.

[0011] This utility model has at least the following beneficial effects: The carrier plate and support frame adopt a sliding connection, which allows for quick release and reset of the top limit, avoiding the tool dependence and space limitations of traditional bolt fixing. The annular sealing plate is embedded in the annular sealing groove at the top of the connecting pipe, which not only achieves reliable radial and axial sealing and prevents unfiltered air bypass, but also replaces the flange bolt connection with a quick-install structure, significantly simplifying the disassembly and assembly steps. The filter element is inserted or removed as an independent module without disassembling the main pipeline, greatly reducing downtime for maintenance. The inlet filter plate is integrated on the carrier plate, taking into account both primary filtration and structural integrity. The entire device effectively avoids problems such as thread stripping, flange deformation, or gasket aging caused by repeated tightening of bolts, while ensuring that the sealing performance is no less than the original factory standard. This not only significantly reduces the intensity of manual labor and maintenance costs, but also improves equipment availability and operational safety, better meeting the specific needs of modern industry for efficient operation and maintenance, minimal downtime loss, and standardized rapid maintenance. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the main structure of this utility model; Figure 2 This is a schematic diagram of the intake pipe structure of this utility model; Figure 3 This is a schematic diagram of the air inlet filter plate structure of this utility model; Figure 4 This is a top view of the intake pipe structure of this utility model; Figure 5 This is a schematic diagram of the inner structure of the intake pipe of this utility model; Figure 6 This is a schematic diagram of the filter element structure of this utility model; Figure 7 This is a schematic diagram of the annular sealing plate structure of this utility model.

[0014] In the diagram: 1. Screw air compressor body; 2. Inlet pipe; 3. Inlet filter plate; 4. Bearing plate; 5. Support frame; 6. Slider; 7. Slide groove; 8. Support rod; 9. Tension spring; 10. Threaded rod; 11. Filter element; 12. Sliding block; 13. Sliding groove; 14. Connecting pipe; 15. Annular sealing plate; 16. Annular sealing groove. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] Reference Figure 1-7 A quick-release filter replacement device for a screw air compressor includes a screw air compressor body 1. An air inlet pipe 2 is connected to one side of the screw air compressor body 1, and a filter element 11 is slidably connected to the inner side of the air inlet pipe 2. A connecting pipe 14 is fixedly connected to the lower inner side of the air inlet pipe 2, and an annular sealing groove 16 is provided at the top of the connecting pipe 14. An annular sealing plate 15 is provided inside the annular sealing groove 16. The top of the annular sealing plate 15 is fixedly connected to the bottom of the filter element 11. A support frame 5 is fixedly connected to the upper part of the air inlet pipe 2, and a bearing plate 4 is provided at the top of the air inlet pipe 2. An air inlet filter plate 3 is fixedly connected to the top of the bearing plate 4. Both sides of the bearing plate 4 are slidably connected to the inner wall of the support frame 5.

[0017] In the actual working process of this screw air compressor quick-release filter replacement device, the screw air compressor body 1 is in normal operation. External air enters the system through the intake pipe 2. The airflow first undergoes preliminary coarse filtration through the top intake filter plate 3 before entering the intake pipe 2. Then, it undergoes high-efficiency fine filtration through the filter element 11 to remove impurities such as dust and oil mist. The clean air finally enters the screw air compressor body 1 to complete the compression operation. When the filter element 11 reaches the end of its service life or when the differential pressure alarm indicates that it needs to be replaced, the operator first shuts down the air compressor and releases the residual pressure in the system. Then, the operator slides the bearing plate 4, which is slidably connected to the inner wall of the support frame 5, upwards or outwards, thereby releasing the restriction on the top of the intake pipe 2. Next, release the snap-fit ​​or locking structure between the annular sealing plate 15 and the annular sealing groove 16 at the top of the connecting pipe 14, so that the sealing connection at the bottom of the filter element 11 is loosened. At this time, the filter element 11 is held in the air inlet pipe 2 by gravity or slight friction, and the operator can directly pull it out vertically from above the air inlet pipe 2. When replacing the new filter element 11, align the annular sealing plate 15 at the bottom of the new part with the annular sealing groove 16, insert and lock it, and then slide the bearing plate 4 back into the support frame 5 to restore the top limit and the overall sealing structure. The whole process does not require disassembling the air inlet pipe 2 body, using wrenches or bolt tools, or removing flanges, clamps or protective covers. The replacement operation can be completed in just a few minutes.

[0018] Furthermore, sliding blocks 12 are fixedly connected to both sides of the filter element 11, and both sliding blocks 12 are slidably connected to the inner wall of the air intake pipe 2 through sliding grooves 13. During the process of inserting or removing the filter element 11 from the air intake pipe 2, the sliding blocks 12 move smoothly along the sliding grooves 13. This structure achieves the effect of ensuring that the filter element 11 moves linearly along the axial direction during the disassembly and assembly process, avoiding skewness and jamming, while improving the installation positioning accuracy and operation smoothness.

[0019] Furthermore, sliders 6 are fixedly connected to both sides of the support plate 4, and both sliders 6 are slidably connected to the inner wall of the support frame 5 through the sliding groove 7. When replacing the filter element 11, the support plate 4 can slide out or be pushed into the support frame 5 smoothly along the sliding groove 7. This structure achieves the effect of making the disassembly and assembly of the support plate 4 stable and reliable, preventing shaking and falling off, and ensuring accurate alignment between the air intake filter plate 3 and the air intake channel.

[0020] Furthermore, support rods 8 are provided on both sides of the support frame 5, and one end of each support rod 8 passes through the side wall of the support frame 5 and the two sliders 6 in sequence. During the sliding of the bearing plate 4, the support rods 8 pass through the internal channels of the sliders 6 as guide shafts. This structure provides additional lateral constraints to the sliders 6 and the bearing plate 4, preventing them from warping or detaching from the groove 7 under vibration or force, thereby enhancing the overall structural stability.

[0021] Furthermore, a tension spring 9 is fitted on one end of each of the two support rods 8, and one end of the support rod 8 is elastically connected to the side wall of the support frame 5 through the tension spring 9. Under normal operating conditions, the tension spring 9 applies an inward pulling force to the slider 6, keeping the bearing plate 4 tightly attached to the top of the air intake pipe 2. When the filter element 11 needs to be replaced, the bearing plate 4 can be pulled outward by overcoming the spring tension, and the spring can assist in resetting after releasing. This structure achieves the dual functions of automatic limiting and convenient unlocking of the bearing plate 4, improving the convenience of operation and preventing accidental loosening during operation.

[0022] Furthermore, a threaded rod 10 is provided on one side of the intake pipe 2, and one end of the threaded rod 10 passes through the side wall of the intake pipe 2, the side wall of the connecting pipe 14, and one side of the annular sealing plate 15 through the threaded groove. The threaded rod 10 is used to limit the connection between the connecting pipe 14 and the annular sealing plate 15. After the filter element 11 is installed in place, the threaded rod 10 is tightened to press against the annular sealing plate 15, thereby firmly locking the bottom of the filter element 11 in the annular sealing groove 16. When disassembling, simply loosen the threaded rod 10 in the opposite direction to release the limit. This structure achieves the effect of quick locking and releasing of the bottom of the filter element 11 without the need for flange bolts or clamps, taking into account both sealing reliability and disassembly efficiency.

[0023] In summary: In the complete workflow of this screw air compressor quick-release filter replacement device, when the screw air compressor body 1 is running normally, external air first undergoes preliminary coarse filtration through the air intake filter plate 3 at the top of the intake pipe 2 before entering the interior of the intake pipe 2. The sliders 6 fixedly connected to both sides of the bearing plate 4 are embedded in the sliding grooves 7 on the inner wall of the support frame 5. Under the elastic tension of the support rod 8 passing through the channel of the slider 6 and the tension spring 9, the stability of the bearing plate 4 is improved. The air then undergoes efficient fine filtration through the filter element 11. The sliding blocks 12 fixed on both sides of the filter element 11 are precisely guided and positioned along the sliding grooves 13 on the inner wall of the intake pipe 2. The annular sealing plate 15 at its bottom is embedded in the annular sealing groove 16 at the top of the connecting pipe 14 and is reliably locked by the threaded rod 10 set on the side wall of the intake pipe 2 to prevent unfiltered air from bypassing. When the filter element 11 reaches the replacement cycle or the differential pressure alarm is triggered, The operator first shuts down the equipment and depressurizes it. Then, overcoming the tension of the tension spring 9, the operator smoothly pulls the bearing plate 4 outward along the slide groove 7, releasing the restriction on the top of the air intake pipe 2. Next, the operator unscrews the threaded rod 10 in the opposite direction to release its pressure constraint on the annular sealing plate 15, allowing the annular sealing plate 15 to disengage from the restriction of the annular sealing groove 16. At this time, the filter element 11 is held in the air intake pipe 2 by only slight friction, and the operator can pull it out vertically upward. When replacing the new filter element 11, the operator aligns the annular sealing plate 15 at the bottom of the new part with the annular sealing groove 16 and inserts it. The operator then tightens the threaded rod 10 to relock it, and pushes the bearing plate 4 back into the support frame 5. The tension spring 9 automatically resets, making it fit tightly against the top of the air intake pipe 2, restoring the overall sealing structure. The entire process does not require disassembling the air intake pipe 2, flange, clamps, or using special tools. The replacement can be completed in a few minutes with only simple sliding and rotating actions. The sliding block 12 and sliding groove 13 ensure straight alignment during the installation of the filter element 11, preventing misalignment that could lead to sealing failure or jamming. The bearing plate 4 slides in the sliding groove 7 via the slider 6, and is guided laterally by the support rod 8. The tension spring 9 enables automatic reset and prevents loosening during operation, ensuring stable coverage of the air intake filter plate 3 and making disassembly and assembly easy and reliable. The threaded rod 10 serves as a simple manual locking component, replacing the traditional multiple bolts or clamps. Only a single-point adjustment is needed to achieve tight sealing between the annular sealing plate 15 and the annular sealing groove 16, ensuring airtightness while significantly simplifying the operation. The entire structure significantly reduces downtime and labor costs while maintaining or even improving sealing performance. It also avoids problems such as thread damage, flange deformation, or gasket aging caused by repeated disassembly and assembly, extending the service life of the air intake system.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-release filter replacement device for a screw air compressor, comprising a screw air compressor body (1), characterized in that, The screw air compressor body (1) is connected to an air inlet pipe (2) on one side, and a filter element (11) is slidably connected to the inner side of the air inlet pipe (2). A connecting pipe (14) is fixedly connected to the lower inner side of the air inlet pipe (2), and an annular sealing groove (16) is opened at the top of the connecting pipe (14). An annular sealing plate (15) is provided on the inner side of the annular sealing groove (16). The top of the annular sealing plate (15) is fixedly connected to the bottom of the filter element (11). A support frame (5) is fixedly connected to the upper part of the air inlet pipe (2), and a bearing plate (4) is provided at the top of the air inlet pipe (2). An air inlet filter plate (3) is fixedly connected to the top of the bearing plate (4). Both sides of the bearing plate (4) are slidably connected to the inner wall of the support frame (5).

2. The screw air compressor quick-release filter element replacement device according to claim 1, characterized in that, Both sides of the filter element (11) are fixedly connected to sliding blocks (12), and both sliding blocks (12) are slidably connected to the inner wall of the air inlet pipe (2) through sliding grooves (13).

3. The screw air compressor quick-release filter element replacement device according to claim 1, characterized in that, Both sides of the bearing plate (4) are fixedly connected to sliders (6), and both sliders (6) are slidably connected to the inner wall of the support frame (5) through the sliding groove (7).

4. The screw air compressor quick-release filter element replacement device according to claim 3, characterized in that, The support frame (5) is provided with support rods (8) on both sides, and one end of each support rod (8) passes through the side wall of the support frame (5) and the two sliders (6) in sequence.

5. A quick-release filter element replacement device for a screw air compressor according to claim 4, characterized in that, Each of the two support rods (8) is fitted with a tension spring (9) at one end, and one end of the support rod (8) is elastically connected to the side wall of the support frame (5) through the tension spring (9).

6. A quick-release filter element replacement device for a screw air compressor according to claim 1, characterized in that, The intake pipe (2) has a threaded rod (10) on one side, and one end of the threaded rod (10) passes through the side wall of the intake pipe (2) and the side wall of the connecting pipe (14) and one side of the annular sealing plate (15) in sequence through the threaded groove.

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