Air compressor filtering device for hydroxypropyl methyl cellulose production

Abstract

The invention discloses an air compressor filtering device for hydroxypropyl methyl cellulose production, which comprises a device main body, a butt joint air pipe communicated with an air inlet of an air compressor is arranged on the left side surface of the device main body, and an air inlet hole for primarily screening dust is formed in the middle position of the upper surface of the device main body; filtering assemblies for automatically switching filtering systems are arranged in the chambers at the two ends of the device main body. Firstly, a second auxiliary air cylinder is controlled to be started to drive a second sealing plug to downwards seal a second air inlet pipe, at the moment, an opened first air inlet pipe can drive an air inlet hole to exhaust air, and large-particle dust in air can be primarily filtered through the air inlet hole; and then the hydroxypropyl methyl cellulose dust can be quickly filtered by the sucked air through the filter element I, and at the moment, the filtered air can be introduced into the air compressor by the butt-joint air pipe, so that the use safety of the air compressor can be improved.

Description

Technical Field

[0001] This invention relates to the field of dust filtration technology, and more particularly to an air compressor filtration device for the production of hydroxypropyl methylcellulose. Background Technology

[0002] Hydroxypropyl methylcellulose (HPMC), also known as hydroxypropyl methylcellulose ether, is a nonionic cellulose derivative. It appears as a white or off-white powder, soluble in water and some organic solvents. Its aqueous solution exhibits high transparency and surface activity, and its gel temperature depends on the methoxyl content. This substance is a core dispersant in the suspension polymerization of polyvinyl chloride (PVC). By reducing the interfacial tension between the monomer and water, it regulates the resin particle morphology to improve processing performance. It can replace traditional dispersants and form complex systems with polyvinyl alcohol. HPMC is also used in the building materials industry as a water-retaining agent in cement mortar and a tile adhesive; in the coatings industry as a thickener and stabilizer; and in the pharmaceutical industry for tablet coating and sustained-release formulations.

[0003] Currently, patent CN202511055934.X discloses an air compressor filter device for the production of hydroxypropyl methylcellulose, including a housing. The housing contains an ash removal device, which includes a second filter screen. A hydraulic chamber is fixedly connected inside the housing. A hydraulic rod is slidably connected to one end of the hydraulic chamber, and another hydraulic rod is slidably connected to the other end. A rotating rod is rotatably connected to the end of the second hydraulic rod. The overall structure of this filter device makes it unclear how it connects to the air compressor's inlet, causing inconvenience. Furthermore, this filter device is designed to address the second filter screen. The existing dust removal structure has problems. First, the clogging surface of filter screen two is located between filter screen one and filter screen two, and the user cannot observe the clogging of filter screen two in a timely manner. This reduces the timeliness of cleaning filter screen two. Prolonged delays in cleaning can lead to increased air compressor intake resistance, decreased compression efficiency, and potentially equipment damage or shutdown. Second, the dust removal device requires a certain amount of time to clean the clogging surface of filter screen two during use. Since cleaning is performed while the filter is in use, the air permeability of filter screen two is not stable, and new dust can re-clogging it. This significantly reduces the cleaning efficiency and quality of the dust removal device. Therefore, how to provide a filter device for an air compressor used in the production of hydroxypropyl methylcellulose is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] One object of the present invention is to provide an air compressor filtration device for the production of hydroxypropyl methylcellulose, so as to solve the above-mentioned technical problems.

[0005] An air compressor filtration device for the production of hydroxypropyl methylcellulose according to an embodiment of the present invention includes:

[0006] The device body has a connecting air pipe on its left side that communicates with the air inlet of an air compressor. An air inlet for initial screening of dust is provided in the middle of the upper surface of the device body. Filter components with an automatic switching filtration system are provided in the chambers at both ends of the device body. A self-cleaning component for backflushing is provided in the middle chamber of the device body. A maintenance door for observing the internal components of the device body is hinged to the front of the left end of the device body.

[0007] The filtration assembly includes a filtration unit, a switching unit, and a collection unit. The filtration unit is installed in the chambers at both ends of the main body of the device, the switching unit is installed on the surface of the filtration unit, and the collection unit is located at the bottom of the main body of the device.

[0008] As a preferred embodiment of the present invention, the filtration unit includes an air supply cylinder. The lower surface of the left end of the air supply cylinder is connected to an air inlet pipe. The lower surface of the air inlet pipe is rotatably connected to an upper retaining seat via a closed bearing. A sealing ring is embedded in the lower surface of the left end of the device body. The inner cavity of the sealing ring is movably fitted with a lower supply pipe that slides against its inner wall. The upper surface of the lower supply pipe is rotatably connected to a lower retaining seat via a closed bearing. An adjusting cylinder connected to the left side surface of the lower supply pipe is fixedly installed on the bottom surface of the inner cavity of the left end of the device body. Filter elements are engaged at opposite ends of the upper and lower retaining seats.

[0009] As a preferred embodiment of the present invention, the lower surface of the right end of the air cylinder is connected to an air inlet pipe II. The lower surface of the air inlet pipe II is rotatably connected to an upper retaining seat II via a closed bearing. A sealing ring II is embedded in the lower surface of the right end of the device body. The inner cavity of the sealing ring II is fitted with a lower air inlet pipe II that slides against its inner wall. The outer surface of the upper end of the lower air inlet pipe II is rotatably connected to a lower retaining seat II via a closed bearing. An adjusting cylinder II connected to the right side surface of the lower air inlet pipe II is fixedly installed on the bottom surface of the inner cavity of the right end of the device body. A filter element II is clamped at the opposite end of the upper retaining seat II and the lower retaining seat II.

[0010] As a preferred embodiment of the present invention, the inner sides of the upper surfaces of both the lower card holder one and the lower card holder two are inclined surfaces.

[0011] As a preferred embodiment of the present invention, the switching unit includes an auxiliary cylinder, the bottom of which is fixedly mounted on the upper surface of the left end of the main body of the device. A sealing plug for opening and closing is fixedly connected to the piston rod at the bottom of the auxiliary cylinder. A driven gear is fixedly connected to the outer surface of the upper end of the upper card seat. A servo motor connected to the bottom surface of the air supply cylinder is provided on the right side of the air inlet pipe. A switching gear that meshes with the driven gear is fixedly connected to the output shaft surface at the bottom of the servo motor.

[0012] As a preferred embodiment of the present invention, an auxiliary cylinder two is fixedly installed on the upper surface of the right end of the main body of the device. A sealing plug two is fixedly connected to the piston rod at the bottom of the auxiliary cylinder two. A driven gear two is fixedly connected to the outer surface of the upper end of the upper card seat two. A servo motor two connected to the upper surface of the inner cavity of the main body of the device is provided on the left side of the air inlet pipe two. A switching gear two that meshes with the driven gear two is fixedly connected to the output shaft surface at the bottom of the servo motor two.

[0013] As a preferred embodiment of the present invention, a pressure sensor is embedded in the upper surface of the connecting air tube.

[0014] As a preferred embodiment of the present invention, the collection unit includes a seam scraper, the right end of which is fixedly connected to the upper surface of the left end of the lower conveying pipe, and the upper surface of the right end of the lower conveying pipe is fixedly connected to a seam scraper. A collection box is fixedly connected to the bottom of the main body of the device. A track groove is provided on the front of the lower end of the collection box. A dust collection drawer that slides against the inner wall of the track groove is engaged inside the track groove. A handle is threadedly connected to the top of the front of the dust collection drawer and the front of the main body of the device.

[0015] As a preferred embodiment of the present invention, the self-cleaning component includes a blower. The bottom of the blower is fixedly installed at the center of the bottom surface of the inner cavity of the main body of the device. The exhaust port at the upper end of the blower is connected to a back-blowing inner pipe. An air supply hole one is opened on the left side surface of the upper end of the back-blowing inner pipe, and an air supply hole two is opened on the right side surface of the lower end of the back-blowing inner pipe. A back-blowing outer pipe with two chambers is connected to the outer surface of the back-blowing inner pipe. A back-blowing hole one with a fan-shaped array is opened on the left side surface of the back-blowing outer pipe, and a back-blowing hole two with a fan-shaped array is opened on the right side surface of the back-blowing outer pipe.

[0016] As a preferred embodiment of the present invention, a conversion cylinder is fixedly installed on the upper surface of the backflush outer tube, and a plunger is fixedly connected to the piston rod at the bottom of the conversion cylinder. A T-shaped transfer hole is opened inside the lower end of the plunger.

[0017] The beneficial effects of this invention are:

[0018] This invention utilizes a filter unit. First, it controls the activation of adjusting cylinders one and two. Activating adjusting cylinder one moves the lower clamping seat one upwards. When the lower and upper clamping seats one are fully engaged with filter element one, the clamping and fixing of filter element one is quickly completed. Activating adjusting cylinder two moves the lower clamping seat two upwards. When the lower and upper clamping seats two are fully engaged with filter element two, the clamping and fixing of filter element two is quickly completed. Then, activating adjusting cylinders one and two again allows for the rapid disassembly of filter element one and filter element two. The coordinated use of adjusting cylinders one and two facilitates the installation and removal of filter elements of different models, improving the practicality of the filter device.

[0019] This invention, through a switching unit, first controls the activation of auxiliary cylinder two, which drives the sealing plug two to close the intake pipe two downwards. At this time, the opened intake pipe one can then draw in air through the intake port. The intake port can perform preliminary filtration of large dust particles in the air. The drawn-in air then passes through filter element one, quickly filtering hydroxypropyl methylcellulose dust. The connecting air pipe then introduces the filtered air into the air compressor, thus improving the safety of the air compressor during operation. Next, controlling the activation of the pressure sensor allows for real-time monitoring of the air pressure in the connecting air pipe. When the air pressure drops to the preset value of the pressure sensor, it can promptly detect blockage in filter element one. At this point, auxiliary cylinder one and auxiliary cylinder two are activated simultaneously. Upon startup, the first sealing cylinder blocks the air intake pipe, sealing the airflow within filter element one. Simultaneously, the second auxiliary cylinder moves the first sealing cylinder upwards, opening the air intake pipe. This allows for rapid switching between filter elements one and two, ensuring the filtration system operates without shutdown, thus improving efficiency and quality. Finally, the servo motor drives the switching gear, which in turn rotates the driven gear and the upper chuck. The upper chuck's rotation rotates the filter element one, quickly adjusting the clogged area to align with the backflushing structure, thereby enhancing the self-cleaning component's efficiency.

[0020] This invention utilizes a collection unit. Firstly, the lower conveying pipes one and two transport the hydroxypropyl methylcellulose (HMC) dust filtered out of the filter element downwards to the collection box and dust collection drawer. Placing water inside the dust collection drawer adsorbs the fallen HMC dust, effectively preventing it from being stirred up again and significantly improving the filtration quality. Then, controlling servo motors one and two to continuously rotate drives filter elements one and two to rotate continuously. The rotation of filter elements one and two drives the rotation of lower clamping seats one and two. At this time, the joint scrapers one and two... This allows the hydroxypropyl methylcellulose dust accumulated on the upper surfaces of the lower card holders to be guided into the interior of the lower conveying pipes, effectively preventing dust accumulation in filter elements one and two, thus further improving the filtration efficiency of filter elements one and two. Finally, the bolts on the dust collection drawer are reversed and disengaged from the main body of the device, allowing the dust collection drawer to be pulled forward and disengaged from the inner cavity of the track groove. This makes it convenient for the user to clean the filtered impurities in the dust collection drawer. The dust collection drawer can then be inserted back into the track groove, enabling continuous use of the filtration device and significantly improving the user experience.

[0021] This invention utilizes a self-cleaning component. First, starting the switching cylinder moves the plunger and the transfer hole upwards simultaneously. When the transfer hole aligns with the first air outlet, the inner cavities of the transfer hole and the first air outlet are connected. At this point, starting the blower transmits air to the inside of the back-blowing inner tube. The back-blowing inner tube then transmits the air through the transfer hole and the first air outlet to the left chamber of the back-blowing outer tube. The back-blowing outer tube then delivers air through the back-blowing hole to the blockage in the first filter element. The continuous blowing through the back-blowing hole removes dust from the inner wall of the first filter element. The continuous rotation of the first filter element achieves comprehensive cleaning of the dust on its inner wall. This back-blowing dust cleaning method is highly efficient and effectively reduces filter element damage, further extending the filter element's lifespan. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of an air compressor filtration device for the production of hydroxypropyl methylcellulose proposed in this invention;

[0024] Figure 2 This is a schematic diagram of the structure of an air compressor filter device for the production of hydroxypropyl methylcellulose proposed in this invention, viewed from the right side.

[0025] Figure 3 This is a front sectional view of an air compressor filter device for the production of hydroxypropyl methylcellulose proposed in this invention.

[0026] Figure 4 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 3 A three-dimensional image.

[0027] Figure 5 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 4 A structural diagram from the right-hand perspective.

[0028] Figure 6 This is a schematic diagram of the internal structure of an air compressor filter device for the production of hydroxypropyl methylcellulose proposed in this invention.

[0029] Figure 7 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 6 A three-dimensional image;

[0030] Figure 8 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 4 Enlarged view of point A in the middle;

[0031] Figure 9 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 4 Enlarged view of point B in the middle;

[0032] Figure 10 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 5 Enlarged view of point C in the middle;

[0033] Figure 11 This invention proposes an air compressor filtration device for the production of hydroxypropyl methylcellulose. Figure 5 Enlarged view of point D in the middle.

[0034] In the diagram: 1. Main body of the device; 2. Connecting air pipe; 3. Air inlet; 4. Filter assembly; 401. Air delivery cylinder; 402. Air inlet pipe one; 403. Upper bracket one; 404. Sealing ring one; 405. Lower delivery pipe one; 406. Lower bracket one; 407. Adjustment cylinder one; 408. Filter element one; 409. Air inlet pipe two; 410. Upper bracket two; 411. Sealing ring two; 412. Lower delivery pipe two; 413. Lower bracket two; 414. Adjustment cylinder two; 415. Filter element two; 416. Auxiliary cylinder one; 417. Sealing plug one; 418. Driven gear one; 419. Servo motor one; 420. Switching 421. Gear 1; 422. Auxiliary Cylinder 2; 423. Sealing Plug 2; 424. Driven Gear 2; 425. Servo Motor 2; 426. Switching Gear 2; 427. Pressure Sensor; 428. Joint Scraper 1; 429. Joint Scraper 2; 430. Collection Box; 431. Track Slide; 432. Dust Collection Drawer; 5. Self-Cleaning Components; 501. Blower; 502. Backflush Inner Pipe; 503. Air Inlet 1; 504. Air Inlet 2; 505. Backflush Outer Pipe; 506. Backflush Hole 1; 507. Backflush Hole 2; 508. Conversion Cylinder; 509. Plunger; 510. Transfer Hole; 6. Maintenance Door. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0036] refer to Figures 1-11 An air compressor filtration device for the production of hydroxypropyl methylcellulose.

[0037] This implementation plan includes:

[0038] The device body 1 has a connecting air pipe 2 on its left side that connects to the air inlet of the air compressor. An air inlet 3 for initial screening of dust is located in the middle of the upper surface of the device body 1. Filter components 4 with automatic switching filtration systems are installed in the chambers at both ends of the device body 1. A self-cleaning component 5 for backflushing is installed in the middle chamber of the device body 1. A maintenance door 6 for observing the internal components of the device body 1 is hinged to the front of the left end of the device body 1. The filter component 4 includes a filter unit, a switching unit, and a collection unit. The filter unit is installed in the chambers at both ends of the device body 1, the switching unit is installed on the surface of the filter unit, and the collection unit is located at the bottom of the device body 1.

[0039] The filter unit includes an air supply cylinder 401. An air inlet pipe 402 is connected to the lower surface of the left end of the air supply cylinder 401. An upper retainer 403 is rotatably connected to the lower surface of the air inlet pipe 402 via a closed-type bearing. A sealing ring 404 is embedded in the lower surface of the left end of the device body 1. A lower supply pipe 405, which slides against the inner wall of the sealing ring 404, is movably sleeved within the inner cavity of the sealing ring 404. A lower retainer 406 is rotatably connected to the upper surface of the lower supply pipe 405 via a closed-type bearing. An adjusting cylinder 407, connected to the left side surface of the lower supply pipe 405, is fixedly installed on the bottom surface of the left end of the device body 1. The opposite ends of the upper retainer 403 and the lower retainer 406 are both engaged. There is a filter element 408; the lower surface of the right end of the air cylinder 401 is connected to the air inlet pipe 409, the lower surface of the air inlet pipe 409 is rotatably connected to the upper seat 410 through a closed bearing, the lower surface of the right end of the device body 1 is embedded with a sealing ring 411, the inner cavity of the sealing ring 411 is fitted with a lower pipe 412 that slides against its inner wall, the outer surface of the upper end of the lower pipe 412 is rotatably connected to the lower seat 413 through a closed bearing, the bottom surface of the inner cavity of the right end of the device body 1 is fixedly installed with an adjusting cylinder 414 that is connected to the right side surface of the lower pipe 412, and the upper seat 410 and the lower seat 413 are both clamped with filter elements 415.

[0040] The inner sides of the upper surfaces of both lower card holder 1 (406) and lower card holder 2 (413) are inclined surfaces.

[0041] The switching unit includes an auxiliary cylinder 416, the bottom of which is fixedly mounted on the upper surface of the left end of the main body 1. A piston rod at the bottom of the auxiliary cylinder 416 is fixedly connected to a sealing plug 417 for opening and closing. A driven gear tooth 418 is fixedly connected to the outer surface of the upper end of the upper bracket 403. A servo motor 419, connected to the bottom surface of the air supply cylinder 401, is located on the right side of the air inlet pipe 402. A gear meshing with the driven gear tooth 418 is fixedly connected to the output shaft surface at the bottom of the servo motor 419. The switching gear 420 is engaged; an auxiliary cylinder 421 is fixedly installed on the upper surface of the right end of the main body 1, and a plug 422 is fixedly connected to the piston rod at the bottom of the auxiliary cylinder 421; a driven gear 423 is fixedly connected to the outer surface of the upper end of the upper locator 410; a servo motor 424 connected to the upper surface of the inner cavity of the main body 1 is provided on the left side of the air inlet pipe 409; a switching gear 425 that meshes with the driven gear 423 is fixedly connected to the output shaft surface at the bottom of the servo motor 424.

[0042] A pressure sensor 426 is embedded in the upper surface of the connecting air tube 2.

[0043] The collection unit includes a seam scraper 427, the right end of which is fixedly connected to the upper surface of the left end of the lower conveying pipe 405. A seam scraper 428 is fixedly connected to the upper surface of the right end of the lower conveying pipe 412. A collection box 429 is fixedly connected to the bottom of the device body 1. A track groove 430 is provided on the front of the lower end of the collection box 429. A dust collection drawer 431 that slides against the inner wall of the track groove 430 is engaged inside the track groove 430. A handle is threadedly connected to the top of the front of the dust collection drawer 431 and the front of the device body 1.

[0044] The self-cleaning component 5 includes a blower 501, the bottom of which is fixedly installed at the center of the bottom surface of the inner cavity of the main body 1. The exhaust port at the upper end of the blower 501 is connected to a back-blowing inner pipe 502. An air inlet 503 is provided on the left side surface of the upper end of the back-blowing inner pipe 502, and an air inlet 504 is provided on the right side surface of the lower end of the back-blowing inner pipe 502. A back-blowing outer pipe 505 with two chambers is connected to the outer surface of the back-blowing inner pipe 502. A fan-shaped array of back-blowing holes 506 is provided on the left side surface of the back-blowing outer pipe 505, and a fan-shaped array of back-blowing holes 507 is provided on the right side surface of the back-blowing outer pipe 505. A conversion cylinder 508 is fixedly installed on the upper surface of the back-blowing outer pipe 505. A plunger 509 is fixedly connected to the piston rod at the bottom of the conversion cylinder 508. A T-shaped transfer hole 510 is provided inside the lower end of the plunger 509.

[0045] Working principle: First, the adjustment cylinders 407 and 414 are activated. Activation of adjustment cylinder 407 moves lower clamping seat 406 upwards. When lower clamping seat 406 and upper clamping seat 403 are fully engaged with filter element 408, the clamping and fixing of filter element 408 is quickly completed. Activation of adjustment cylinder 414 moves lower clamping seat 413 upwards. When lower clamping seat 413 and upper clamping seat 410 are fully engaged with filter element 415, the clamping and fixing of filter element 415 is quickly completed. Then, auxiliary cylinders 416 and 421 are activated. Activation of auxiliary cylinder 416 moves sealing plug 417 upwards, thus completing the clamping and fixing of intake pipe 417. When the 02 channel opens, the activation of auxiliary cylinder 421 drives the sealing plug 422 to close the intake pipe 409 downwards. The opened intake pipe 402 then drives the intake port 3 to draw in air. The intake port 3 provides initial filtration of large dust particles in the air. The drawn-in air then passes through filter element 408, quickly filtering hydroxypropyl methylcellulose dust. The connecting air pipe 2 then introduces the filtered air into the air compressor. The activation of pressure sensor 426 allows for real-time monitoring of the air pressure within the connecting air pipe 2. When the air pressure drops to the preset value of pressure sensor 426, it detects blockage in filter element 408. At this point, auxiliary cylinders 416 and 421 activate simultaneously. When auxiliary cylinder 416 is activated, it blocks the intake pipe 402 downwards via plug 417, sealing the airflow within filter element 408. Simultaneously, auxiliary cylinder 421 activates, causing plug 422 to move upwards, opening the intake pipe 409. This quickly switches between filter element 408 and filter element 415, ensuring the filtration system can operate without stopping. Downward transfer pipes 405 and 412 then transport the filtered hydroxypropyl methylcellulose dust downwards to the collection box 429 and dust collection drawer 431. Water placed inside the dust collection drawer 431 absorbs the falling hydroxypropyl methylcellulose dust, effectively preventing hydroxypropyl methylcellulose from accumulating. The dust is stirred up again, significantly improving the filtration quality of hydroxypropyl methylcellulose dust. Then, by continuously controlling servo motors 419 and 424, filter elements 408 and 415 rotate continuously. This rotation of filter elements 408 and 415 drives the lower retainers 406 and 413 to rotate. At this time, the joint scrapers 427 and 428 guide the hydroxypropyl methylcellulose dust accumulated on the upper surfaces of the lower retainers 406 and 413 into the lower conveying pipes 405 and 412, effectively preventing dust accumulation inside filter elements 408 and 415, thus further improving their filtration efficiency.Finally, the bolts on the dust collection drawer 431 are reversed and disengaged from the main body 1. This allows the dust collection drawer 431 to be pulled forward and disengaged from the inner cavity of the slide rail 430, making it convenient for the user to clean the filtered impurities inside the dust collection drawer 431. The dust collection drawer 431 is then inserted back into the slide rail 430, enabling continuous use of the filtration device. Finally, the maintenance door 6 is opened, allowing maintenance personnel to perform maintenance on the internal components of the main body 1.

[0046] Self-cleaning of clogged filter element: First, starting the servo motor 419 drives the switching gear 420 to rotate. The rotation of the switching gear 420 drives the driven gear 418 and the upper chuck 403 to rotate simultaneously. The rotation of the upper chuck 403 drives the filter element 408 to rotate. By controlling the rotation of the filter element 408, the clogged area can be quickly adjusted to the position corresponding to the backflush structure. Then, starting the switching cylinder 508 drives the plunger 509 and the intermediate transfer hole 510 to move upwards simultaneously. When the intermediate transfer hole 510 moves upwards to the position of the air inlet 503... Correspondingly, this completes the connection between the inner cavity of the transfer hole 510 and the air outlet 503. At this point, starting the blower 501 transmits air to the inside of the backflushing inner tube 502. The backflushing inner tube 502 then transmits the air through the transfer hole 510 and the air outlet 503 to the left side chamber of the backflushing outer tube 505. The backflushing outer tube 505 then delivers air through the backflushing hole 506 to the blockage of the filter element 408. The continuous blowing through the backflushing hole 506 removes dust from the inner wall of the filter element 408. The continuous rotation of the filter element 408 further... This allows for comprehensive cleaning of the dust inside the filter element. When the pressure sensor 426 detects that the air pressure in the connecting air pipe 2 has dropped to the preset value, auxiliary cylinders 416 and 421 will restart. Auxiliary cylinder 416 moves the sealing plug 417 upward to open the air inlet pipe 402, while auxiliary cylinder 421 moves the sealing plug 422 downward to close the air inlet pipe 409. At this point, filter element 415 stops working, and filter element 408 is reused. Through the above control steps, filter elements 408 and 415 can be used simultaneously. The continuous switching of 15 ensures that the entire filtration device can be used continuously for a long time. When cleaning filter element 2 415, the switching cylinder 508 is started. The start of the switching cylinder 508 can drive the plunger 509 and the intermediate hole 510 to move downward. When the intermediate hole 510 corresponds to the position of the air outlet 2 504, the inner cavity of the back-blowing inner tube 502 is connected to the right chamber of the back-blowing outer tube 505. Then, the blower 501 is started again to blow the air source out from the back-blowing hole 2 507. In this way, the back-blowing cleaning of the dust on the inner wall of filter element 2 415 can be achieved with the switching unit.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An air compressor filtration device for the production of hydroxypropyl methylcellulose, characterized in that, include: The device body (1) has a connecting air pipe (2) connected to the air inlet of the air compressor on the left side. An air inlet hole (3) for initial screening of dust is opened in the middle of the upper surface of the device body (1). Filter components (4) with automatic switching filter system are provided in the chambers at both ends of the device body (1). A self-cleaning component (5) for backflushing is provided in the middle chamber of the device body (1). A maintenance door (6) for observing the internal components of the device body (1) is hinged to the front of the left end of the device body (1). The filter assembly (4) includes a filter unit, a switching unit and a collection unit. The filter unit is installed in the chambers at both ends of the device body (1), the switching unit is installed on the surface of the filter unit, and the collection unit is located at the bottom of the device body (1).

2. The air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that, The filter unit includes an air supply cylinder (401), the lower surface of the left end of the air supply cylinder (401) is connected to an air inlet pipe (402), the lower surface of the air inlet pipe (402) is rotatably connected to an upper retainer (403) via a closed bearing, the lower surface of the left end of the device body (1) is embedded with a sealing ring (404), the inner cavity of the sealing ring (404) is movably sleeved with a lower supply pipe (405) that slides against its inner wall, the upper surface of the lower supply pipe (405) is rotatably connected to a lower retainer (406) via a closed bearing, the bottom surface of the inner cavity of the left end of the device body (1) is fixedly installed with an adjusting cylinder (407) connected to the left side surface of the lower supply pipe (405), and the upper retainer (403) and the lower retainer (406) are each fitted with a filter element (408).

3. The air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 2, characterized in that, The lower surface of the right end of the air cylinder (401) is connected to the second air inlet pipe (409). The lower surface of the second air inlet pipe (409) is rotatably connected to the second upper bracket (410) through a closed bearing. The lower surface of the right end of the device body (1) is embedded with the second sealing ring (411). The inner cavity of the second sealing ring (411) is fitted with the second lower pipe (412) that slides against its inner wall. The outer surface of the upper end of the second lower pipe (412) is rotatably connected to the second lower bracket (413) through a closed bearing. The bottom surface of the inner cavity of the right end of the device body (1) is fixedly installed with the second adjusting cylinder (414) connected to the right side surface of the second lower pipe (412). The upper bracket (410) and the lower bracket (413) are both clamped with the second filter element (415).

4. The air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 3, characterized in that, The inner sides of the upper surfaces of both the lower card holder one (406) and the lower card holder two (413) are inclined surfaces.

5. The air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 3, characterized in that, The switching unit includes an auxiliary cylinder (416), the bottom of which is fixedly installed on the upper surface of the left end of the main body (1) of the device. The piston rod at the bottom of the auxiliary cylinder (416) is fixedly connected to a sealing plug (417) for opening and closing. The outer surface of the upper end of the upper card seat (403) is fixedly connected to a driven gear (418). The right side of the air inlet pipe (402) is provided with a servo motor (419) connected to the bottom surface of the air delivery cylinder (401). The output shaft surface at the bottom of the servo motor (419) is fixedly connected to a switching gear (420) that meshes with the driven gear (418).

6. The air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 5, characterized in that, An auxiliary cylinder two (421) is fixedly installed on the upper surface of the right end of the main body (1) of the device. A sealing plug two (422) is fixedly connected to the piston rod at the bottom of the auxiliary cylinder two (421). A driven gear two (423) is fixedly connected to the outer surface of the upper end of the upper card seat two (410). A servo motor two (424) connected to the upper surface of the inner cavity of the main body (1) is provided on the left side of the air inlet pipe two (409). A switching gear two (425) that meshes with the driven gear two (423) is fixedly connected to the output shaft surface at the bottom of the servo motor two (424).

7. An air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 6, characterized in that, A pressure sensor (426) is embedded in the upper surface of the docking air pipe (2).

8. An air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 6, characterized in that, The collection unit includes a seam scraper (427), the right end of which is fixedly connected to the upper surface of the left end of the lower pipe (405), and a seam scraper (428) is fixedly connected to the upper surface of the right end of the lower pipe (412). A collection box (429) is fixedly connected to the bottom of the device body (1). A track groove (430) is provided on the front of the lower end of the collection box (429). A dust collection drawer (431) is engaged with the inner wall of the track groove (430), and a handle is threadedly connected to the top of the front of the dust collection drawer (431) and the front of the device body (1).

9. An air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 1, characterized in that, The self-cleaning component (5) includes a blower (501). The bottom of the blower (501) is fixedly installed at the center of the bottom surface of the inner cavity of the main body (1) of the device. The exhaust port at the upper end of the blower (501) is connected to a back-blowing inner tube (502). An air supply hole one (503) is opened on the left side surface of the upper end of the back-blowing inner tube (502). An air supply hole two (504) is opened on the right side surface of the lower end of the back-blowing inner tube (502). A back-blowing outer tube (505) with two chambers is connected to the outer surface of the back-blowing inner tube (502). A back-blowing hole one (506) with a fan-shaped array is opened on the left side surface of the back-blowing outer tube (505). A back-blowing hole two (507) with a fan-shaped array is opened on the right side surface of the back-blowing outer tube (505).

10. An air compressor filtration device for the production of hydroxypropyl methylcellulose according to claim 9, characterized in that, A switching cylinder (508) is fixedly installed on the upper surface of the backflush outer tube (505). A piston rod (509) is fixedly connected to the piston rod at the bottom of the switching cylinder (508). A T-shaped transfer hole (510) is opened inside the lower end of the piston rod (509).

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