Air inlet filtering device of screw compressor

Abstract

An air inlet filtering device of a screw compressor relates to the technical field of screw compressors and comprises a shell, a filter element, an air inlet protective cover and a connecting seat, the shell is of a hollow structure with two through ends, the shell is internally provided with a filter element which is coaxially arranged with the shell, and a gap exists between the filter element and the shell to form a gas inlet cavity which is convenient for external gas to enter; the air inlet protective cover is installed at the top of the shell, the air inlet protective cover is matched with the shell and used for fixing the filter element, a plurality of air inlets are formed in the air inlet protective cover, and the air inlet cavity is communicated with the outside through the air inlets; the connecting seat is mounted at the bottom of the shell, is of a hollow structure with two through ends and comprises a buffer cavity, the top end of the buffer cavity is communicated with the air purification cavity of the filter element, and the bottom end of the buffer cavity is communicated with an air inlet pipe of the screw compressor. According to the screw compressor, gas entering the screw compressor can be filtered, and the service life of the screw compressor is prolonged; meanwhile, the filter element is convenient to replace and maintain.

Description

Technical Field

[0001] This utility model relates to the field of screw compressor technology, and in particular to a screw compressor intake air filter device. Background Technology

[0002] A screw compressor is a device used to compress gas. It is a rotary positive displacement compressor in which two rotors with helical gears mesh with each other, so that the volume at the meshing point of the two rotors decreases, thereby compressing and discharging the gas.

[0003] A screw compressor is a type of air compressor. An air compressor, or air compressor, primarily converts mechanical energy into gas pressure energy to compress air. It is a key component of air supply systems and is widely used in various industrial and civilian applications. In terms of existing technology, for example, the Chinese utility model patent application with publication number CN212594511U entitled "An Air Filter Structure for an Air Compressor" includes a filter housing and a filter element structure. An air inlet pipe is provided on one side of the top of the filter housing, while the filter element structure is located in the center of the filter housing. The filter element structure consists of a filter screen and a filter tube. The filter tube is located in the center of the filter housing, and its upper and lower ends penetrate the top and bottom of the filter housing, respectively. The filter screen is wrapped around the outside of the filter tube. The filter screen is cylindrical and equipped with fixing plates at its upper and lower ends. The fixing plates are used to fix the filter tube. The surface of the filter screen has a number of first filter holes, and the surface of the filter tube also has second filter holes. With the synergistic effect of the first filter holes, activated carbon blocks, and second filter holes, triple filtration can be performed on the air entering the filter housing, thereby improving the air filtration effect and preventing particulate matter in the air from damaging the air compressor.

[0004] However, during the implementation of this technical solution, it was discovered that the existing technology has at least the following drawbacks: In practical applications, when the filter structure filters the air entering the air compressor, the filter elements become contaminated because they need to filter and isolate dust particles, so they must be replaced periodically. However, in actual use, the air filter structure of the aforementioned air compressor makes the replacement of the filter elements extremely inconvenient. Utility Model Content

[0005] In view of this, the technical problem to be solved by this utility model is to provide a screw compressor intake air filter device that can filter the gas entering the screw compressor and improve its service life; at the same time, it is easy to replace the filter element and facilitate maintenance.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0007] A screw compressor intake filtration device includes a housing, a filter element, an intake shield, and a connecting base;

[0008] The outer shell is a hollow structure that extends through both ends. The filter element is installed inside the outer shell and is coaxially arranged therewith. There is a gap between the filter element and the outer shell to form an air intake chamber that facilitates the entry of external gas.

[0009] The air intake cover is installed on the top of the outer shell. The air intake cover is adapted to the outer shell to fix the filter element. The air intake cover has several air inlets. The air intake chamber is connected to the outside through the air inlets.

[0010] The connecting seat is installed at the bottom of the housing. The connecting seat is a hollow structure with both ends open. The connecting seat includes a buffer cavity. The top end of the buffer cavity is connected to the clean air cavity of the filter element, and the bottom end of the buffer cavity is connected to the air inlet pipe of the screw compressor.

[0011] Preferably, the housing includes an annular mounting plate and an annular limiting plate coaxially disposed in its inner cavity, the annular mounting plate being disposed close to the connecting seat, and the annular mounting plate having a coaxially disposed annular mounting groove;

[0012] The annular limiting plate is located near the air intake cover. The annular limiting plate has several air guide ports that communicate with the air intake chamber and several limiting grooves for limiting the rotation of the filter element around its axis.

[0013] Preferably, the bottom end of the filter element is provided with a plurality of plug-in blocks that are adapted to the annular mounting groove along its axial direction, the plurality of plug-in blocks are circumferentially equidistant, and a sealing ring is installed between the annular mounting groove and the plug-in blocks;

[0014] The top of the filter element is provided with a plurality of limiting plates that are adapted to the limiting groove. The limiting plates extend outward along the radial direction of the filter element and are integrally formed therewith. The position and number of the limiting plates correspond one-to-one with the limiting groove.

[0015] Preferably, the air intake cover includes a baffle coaxially disposed in its inner cavity, and the baffle has a plurality of exhaust ports, the positions and numbers of which correspond one-to-one with the air guide ports.

[0016] Preferably, the baffle is an annular structure, and the aperture of the baffle is smaller than the outer diameter of the filter element.

[0017] Preferably, an inner support mesh cage is installed on the annular mounting plate and is located in the clean air chamber of the filter element.

[0018] Preferably, the inner support mesh cage is installed between the annular mounting plate and the connecting seat.

[0019] Preferably, a limiting pad is provided between the inner support mesh cage and the connecting seat.

[0020] Preferably, the inner support cage includes a cage limiting part and a cage support part fixedly connected thereto. The cage limiting part is disposed between the annular mounting plate and the connecting seat, and the cage support part is disposed in the clean air chamber of the filter element.

[0021] Preferably, the outer shell and the air intake cover, as well as the outer shell and the connecting seat, are threaded connections.

[0022] After adopting the above technical solution, the beneficial effects of this utility model are:

[0023] This application includes a housing, a filter element, an air inlet shroud, and a connecting seat. The housing is a hollow structure with both ends open, and the filter element is installed coaxially inside the housing. There is a gap between the filter element and the housing to form an air inlet chamber that allows outside gas to enter. The air inlet shroud is installed on the top of the housing and is adapted to the housing to fix the filter element. The air inlet shroud has several air inlets, and the air inlet chamber communicates with the outside through the air inlets. The connecting seat is installed on the bottom of the housing and is a hollow structure with both ends open. The connecting seat includes a buffer chamber. The top end of the buffer chamber communicates with the clean air chamber of the filter element, and the bottom end of the buffer chamber communicates with the air inlet pipe of the screw compressor. When the filter element is installed inside the housing, it can be directly inserted into the housing and pressed down and fixed by the air intake cover. When the filter element needs to be replaced, it can be removed and replaced simply by moving the air intake cover, which improves the replacement speed of the filter element. The structure is simple and easy to disassemble and assemble. At the same time, the filter element can filter the air entering the screw compressor, thereby improving the service life of the screw compressor. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the structure of the screw compressor intake filter device according to an embodiment of the present invention;

[0026] Figure 2 yes Figure 1 A partial sectional view;

[0027] Figure 3 yes Figure 1 Exploded view;

[0028] Figure 4 yes Figure 1 A sectional view;

[0029] Figure 5 yes Figure 4 Enlarged view of part A;

[0030] Figure 6 yes Figure 4 A partial sectional view of the inner shell;

[0031] Figure 7 yes Figure 4 Partial cross-sectional view of the central air intake shroud;

[0032] In the picture:

[0033] 1. Outer shell; 11. Air intake chamber; 12. Annular mounting plate; 121. Annular mounting groove; 13. Annular limiting plate; 131. Air vent; 132. Limiting groove;

[0034] 2. Filter element; 21. Clean air chamber; 22. Insertion block; 23. Limiting plate;

[0035] 3. Air intake cover; 31. Air intake port; 32. Baffle; 33. Exhaust port;

[0036] 4. Connecting seat; 41. Buffer chamber;

[0037] 5. Sealing ring;

[0038] 6. Internal support cage; 61. Cage limiting part; 62. Cage support part;

[0039] 7. Limiting pad. Detailed Implementation

[0040] 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.

[0041] like Figures 1 to 7 As shown, this utility model includes a housing 1, a filter element 2, an air inlet cover 3, and a connecting seat 4. The housing 1 is a hollow structure with both ends open. The filter element 2 is installed coaxially inside the housing 1, and a gap exists between the filter element 2 and the housing 1 to form an air inlet chamber 11 for easy entry of external gas. The air inlet cover 3 is installed on the top of the housing 1 and is adapted to the housing 1 to fix the filter element 2. The air inlet cover 3 has several air inlets 31, through which the air inlet chamber 11 communicates with the outside. The connecting seat 4 is installed on the bottom of the housing 1 and is a hollow structure with both ends open. The connecting seat 4 includes a buffer chamber 41. The top end of the buffer chamber 41 communicates with the clean air chamber 21 of the filter element 2, and the bottom end of the buffer chamber 41 communicates with the air inlet pipe of a screw compressor (not shown in the figure). Preferably, the housing 1 and the air inlet cover 3, and the housing 1 and the connecting seat 4 are connected by threads.

[0042] Under the suction of the screw compressor, outside air is drawn into the intake shroud 3 through the intake port 31. During this process, any large debris is blocked by the intake shroud 3, preventing it from entering the housing 1. The air entering the intake shroud 3 then passes through the intake chamber 11 into the clean air chamber 21 of the filter element 2. Impurities in the outside air are filtered by the filter element 2, becoming clean gas, which then passes through the buffer chamber 41 into the screw compressor. During this process, when installing the filter element 2 inside the housing 1, it can be directly inserted into the housing 1 and fixed by the pressure of the intake shroud 3. When the filter element 2 needs to be replaced, it can be removed and replaced simply by moving the intake shroud 3, improving the replacement speed of the filter element 2. The structure is simple and easy to install and remove. Simultaneously, the filter element 2 filters the air entering the screw compressor, thereby extending the service life of the screw compressor.

[0043] In this application, the outer casing 1 includes an annular mounting plate 12 and an annular limiting plate 13 coaxially disposed in its inner cavity. The annular mounting plate 12 is disposed near the connecting seat 4 and has an annular mounting groove 121 coaxially disposed on the annular mounting plate 12. The annular limiting plate 13 is disposed near the air intake cover 3 and has a plurality of air guide ports 131 communicating with the air intake cavity 11 and a plurality of limiting grooves 132 for limiting the rotation of the filter element 2 around its axis.

[0044] The bottom end of the filter element 2 has a plurality of insertion blocks 22 protruding along its axial direction, which are adapted to the annular mounting groove 121. The plurality of insertion blocks 22 are equidistantly arranged circumferentially, and a sealing ring 5 is installed between the annular mounting groove 121 and the insertion blocks 22. The top end of the filter element 2 is provided with a plurality of limiting plates 23 adapted to the limiting groove 132. The limiting plates 23 extend radially outward along the filter element 2 and are integrally formed with it. The position and number of the limiting plates 23 and the limiting groove 132 correspond one-to-one. When assembling the filter element 2 and the outer shell 1, the filter element 2 passes through the annular limiting plate 13 and extends into the interior of the outer shell 1 until the insertion blocks 22 are inserted into the groove of the annular mounting groove 121 to achieve insertion and fixation. After insertion, the limiting plate 23 is ensured to be located inside the limiting groove 132 to prevent it from rotating.

[0045] The intake shroud 3 includes a baffle 32 coaxially disposed within its inner cavity. The baffle 32 has several exhaust ports 33, the positions and numbers of which correspond one-to-one with the air inlets 131. After the filter element 2 is inserted into the housing 1, the intake shroud 3 is installed on the top of the housing 1 until the baffle 32 abuts against the top of the filter element 2, ensuring that the exhaust ports 33 correspond to the air inlets 131.

[0046] Preferably, the baffle 32 has an annular structure, and the aperture of the baffle 32 is smaller than the outer diameter of the filter element 2. Setting the baffle 32 as an annular structure facilitates the later cleaning of the inside of the air intake cover 3.

[0047] In this application, to ensure the stability of the filter element 2, an inner support mesh cage 6 is installed on the annular mounting plate 12 and located in the clean air chamber 21 of the filter element 2. Preferably, the inner support mesh cage 6 is installed between the annular mounting plate 12 and the connecting seat 4. After the connecting seat 4 is installed at the bottom of the outer shell 1, the connecting seat 4 can fix the inner support mesh cage 6 between itself and the annular mounting plate 12, thereby securing it. Preferably, a limiting pad 7 is provided between the inner support mesh cage 6 and the connecting seat 4. The limiting pad 7 is a rubber pad. The limiting pad 7 can block the inner support mesh cage 6, preventing it from falling into the buffer chamber 41 of the connecting seat 4. At the same time, it can also enhance the sealing effect between the connecting seat 4 and the outer shell 1, preventing gas leakage.

[0048] The inner support cage 6 includes a cage limiting part 61 and a cage support part 62 fixedly connected thereto. The cage limiting part 61 is disposed between the annular mounting plate 12 and the connecting seat 4, and the cage support part 62 is disposed in the clean air chamber 21 of the filter element 2.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. An air intake filter device for a screw compressor, characterized in that, Includes housing, filter element, air intake shield, and connector; The outer shell is a hollow structure that extends through both ends. The filter element is installed inside the outer shell and is coaxially arranged therewith. There is a gap between the filter element and the outer shell to form an air intake chamber that facilitates the entry of external gas. The air intake cover is installed on the top of the outer shell. The air intake cover is adapted to the outer shell to fix the filter element. The air intake cover has several air inlets. The air intake chamber is connected to the outside through the air inlets. The connecting seat is installed at the bottom of the housing. The connecting seat is a hollow structure with both ends open. The connecting seat includes a buffer cavity. The top end of the buffer cavity is connected to the clean air cavity of the filter element, and the bottom end of the buffer cavity is connected to the air inlet pipe of the screw compressor.

2. The screw compressor intake filter device as described in claim 1, characterized in that, The outer shell includes an annular mounting plate and an annular limiting plate coaxially disposed in its inner cavity. The annular mounting plate is disposed close to the connecting seat, and an annular mounting groove coaxially disposed on the annular mounting plate. The annular limiting plate is located near the air intake cover. The annular limiting plate has several air guide ports that communicate with the air intake chamber and several limiting grooves for limiting the rotation of the filter element around its axis.

3. The screw compressor intake filter device as described in claim 2, characterized in that, The bottom end of the filter element is provided with a plurality of plug-in blocks that are adapted to the annular mounting groove along its axial direction. The plurality of plug-in blocks are circumferentially equidistant, and a sealing ring is installed between the annular mounting groove and the plug-in blocks. The top of the filter element is provided with a plurality of limiting plates that are adapted to the limiting groove. The limiting plates extend outward along the radial direction of the filter element and are integrally formed therewith. The position and number of the limiting plates correspond one-to-one with the limiting groove.

4. The screw compressor intake filter device as described in claim 2, characterized in that, The air intake cover includes a baffle coaxially disposed in its inner cavity, and the baffle has a plurality of exhaust ports, the positions and numbers of which correspond one-to-one with the air guide ports.

5. The screw compressor intake filter device as described in claim 4, characterized in that, The baffle has an annular structure, and the aperture of the baffle is smaller than the outer diameter of the filter element.

6. The screw compressor intake filter device as described in claim 2, characterized in that, An inner support mesh cage is mounted on the annular mounting plate and is located in the clean air chamber of the filter element.

7. The screw compressor intake filter device as described in claim 6, characterized in that, The inner support mesh cage is installed between the annular mounting plate and the connecting seat.

8. The screw compressor intake filter device as described in claim 7, characterized in that, A limiting pad is provided between the inner support cage and the connecting seat.

9. The screw compressor intake filter device as described in claim 8, characterized in that, The inner support cage includes a cage limiting part and a cage support part fixedly connected thereto. The cage limiting part is disposed between the annular mounting plate and the connecting seat, and the cage support part is disposed in the clean air chamber of the filter element.

10. The screw compressor intake filter device as described in claim 1, characterized in that, The outer shell and the air intake cover, as well as the outer shell and the connecting seat, are all threaded connections.

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