Deep purification filter

Abstract

The invention discloses a deep purification filter, which belongs to the technical field of gas filtering equipment, and comprises a cylinder, a mounting table and a limiting structure, the top of the cylinder is provided with an end cover with a spring pressure plate structure, and the bottom of the cylinder is provided with a blow-down valve; a filter element is mounted on the mounting table and is pressed and fixed through a limiting structure, and a sealing gasket is additionally arranged at the top to form axial sealing; a first O-shaped ring is arranged between the bottom cover and the mounting table; and a second O-shaped ring is arranged between the convex ring and the wall of the mounting hole. According to the invention, the mounting table is designed in the cylinder for mounting the filter element, and the limiting structure is designed for pressing the filter element on the mounting table, so that the filter element is prevented from loosening and being damaged due to airflow pulse and pipeline vibration; the surface of the mounting table and the bottom cover are sealed through the first O-shaped ring, and the convex ring on the bottom cover and the hole wall of the mounting hole in the mounting table are sealed through the second O-shaped ring, so that the sealing stability is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of gas filtering equipment, and in particular to a deep purification filter. Background Art

[0002] With the increasing requirements for gas purification efficiency in the industrial field, especially in the field of oil and gas filtration technology, traditional filters often fail to seal due to unstable installation of filter elements, especially under conditions of airflow pulses or pipeline vibration. In the prior art, filter elements mostly use a single sealing structure, which is prone to leakage due to deformation after long-term use, and lacks an effective limit device to offset the impact of mechanical vibration, resulting in the sealing connection between the filter element and the pipeline being prone to failure. In addition, the parallelism deviation of the installation structure can easily lead to uneven force on the sealing surface, accelerating the wear of the seal. At the same time, fixed clamping devices are difficult to adapt to mechanical wear during long-term operation, affecting the service life of the equipment. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide a deep purification filter, which can stably install the filter element in the cylinder and maintain the sealing of the connection.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: The present invention provides a deep purification filter, comprising:

[0005] A cylinder, wherein an end cover is arranged on the top of the cylinder and a sewage discharge structure is arranged on the bottom;

[0006] A mounting platform, the mounting platform is arranged in the cylinder, a mounting hole is opened on the mounting platform, a filter element for filtering oil and gas is sealed and installed on the mounting platform, and a limiting structure for pressing the filter element on the mounting platform is arranged in the cylinder;

[0007] A combined pipe, the combined pipe being sealed and connected to the air inlet at the bottom of the filter element through a mounting hole;

[0008] An air intake pipe, the air intake pipe passes through the side wall of the cylinder and is connected with the combined pipe;

[0009] An air outlet pipe, the air outlet pipe passes through the side wall of the cylinder and is connected to the inner cavity of the cylinder;

[0010] The gas enters the filter element from the air inlet pipe, enters the inner cavity of the cylinder after being filtered by the filter element, and is discharged from the air outlet pipe.

[0011] Preferably, the limiting structure comprises a fixing plate arranged in the combined pipe, a pull rod is inserted into the fixing plate, the pull rod passes through the axis of the filter element, and a sealing nut for resisting the filter element is arranged on the top of the pull rod.

[0012] Preferably, a top cover is fixed to the top of the filter element, and a gasket is provided between the flat step of the sealing nut and the top cover.

[0013] Preferably, a pressing plate is fixed inside the end cover, a spring is provided at the center of the bottom of the pressing plate, and the spring abuts against the flat step of the sealing nut.

[0014] Preferably, a balance weight is provided between the mounting table and the inner wall of the cylinder body, and the balance weight is used to adjust the coaxiality between the mounting table and the inner wall of the cylinder body.

[0015] Preferably, the balance weight is fixed to the mounting table by a lock screw.

[0016] Preferably, a bottom cover is fixed to the bottom of the filter element, a convex ring is fixed to the bottom cover, the convex ring is inserted into the mounting hole, a first O-ring is provided between the mounting table and the bottom cover, and a second O-ring is provided between the convex ring and the inner wall of the mounting hole.

[0017] Preferably, the intake connection pipe is located below the filter element, and the outlet connection pipe is higher than the intake connection pipe.

[0018] Preferably, the sewage discharge structure includes a sewage discharge valve provided at the bottom of the cylinder body.

[0019] Preferably, flanges are welded to both the end cover and the cylinder body, the two flanges are fixedly connected by fasteners, and a third O-ring is provided between the two flanges.

[0020] The beneficial effects of the present invention are as follows:

[0021] In the present invention, a mounting table is designed inside the cylinder body for mounting the filter element, and a limiting structure is designed to press the filter element against the mounting table, avoiding loosening and damage of the filter element due to air flow pulses and pipeline vibrations. The gas to be purified enters from the inlet connection pipe, passes through the combined connection pipe and enters the filter element, and is discharged from the outlet connection pipe after filtration, completing gas filtration. A double-sealing structure is designed between the mounting table and the bottom cover of the filter element. The surface of the mounting table and the bottom cover are sealed by a first O-ring, while the convex ring on the bottom cover and the hole wall of the mounting hole on the mounting table are sealed by a second O-ring, ensuring sealing stability. Structures such as the pull rod, fixing piece, and sealing nut designed in the present invention can limit the filter element on the mounting table to prevent it from falling off, and the pressing plate provided in the end cover can press the spring against the sealing nut, enhancing the sealing effect of the first O-ring and having a certain dynamic sealing ability. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0023] Figure 1 A perspective view of a deep purification filter provided by an embodiment of the present invention.

[0024] Figure 2 A front view of a deep purification filter provided by an embodiment of the present invention.

[0025] Figure 3 A top view of a deep purification filter provided by an embodiment of the present invention.

[0026] Figure 4 For Figure 3 The cross-sectional view at A-A in

[0027] Figure 5 For Figure 4 The partial enlarged view at A in

[0028] Figure 6 For Figure 4 The partial enlarged view at B in

[0029] Figure 7 For Figure 4 The partial enlarged view at C in

[0030] Figure 8 A perspective view of the filter element of the present invention.

[0031] Explanation of reference numerals:

[0032] 1, end cap; 2, pressing plate; 3, sealing nut; 4, spring; 5, sealing gasket; 6, cylinder body; 7, filter element; 71, top cover; 72, bottom cover; 73, convex ring; 74, groove; 8, pull rod; 9, first O-ring; 10, mounting table; 11, balance weight; 12, combined nozzle; 13, inlet nozzle; 14, flat head; 15, drain valve; 16, support leg; 17, fixing piece; 18, lock screw; 19, second O-ring; 20, outlet nozzle; 21, third O-ring; 22, fastener. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1:

[0035] As Figures 1 to 8 shown, Embodiment 1 of the present invention provides a deep purification filter, which is used as a post-treatment device for compressed gas. To ensure that the machine parts do not pollute the gas due to factors such as corrosion and rust, the whole device is made of stainless steel. The present invention mainly includes a cylinder body 6, an end cover 1, and a filter element 7 arranged inside the cylinder body 6. Three or four feet 16 are fixed on the side of the cylinder body 6. A flange is welded on the outer wall of the top of the cylinder body 6, and a flange is also welded on the bottom edge of the end cover 1. A third O-ring 21 is installed between the two flanges. The two flanges are fixedly connected by a plurality of fastening bolts distributed in a ring shape, and sealed connection is achieved through the third O-ring 21. The bottom of the cylinder body 6 is a flat head 14, and a drain valve 15 is arranged on the flat head 14. By opening the drain valve 15, the impurity particles intercepted in the cylinder body 6 can be discharged from the cylinder body 6.

[0036] A combined pipe 12 is fixed inside the cylinder body 6. The combined pipe 12 adopts a stepped design, with a larger diameter at the top than at the bottom. A fixing piece 17 is welded in its inner cavity, and ventilation holes are provided on the fixing piece 17. A pull rod 8 is inserted into the fixing piece 17. An installation table 10 is arranged on the combined pipe 12, and an installation hole communicating with the combined pipe 12 is provided at the center of the installation table 10. The top and bottom of the filter element 7 used in the present invention are respectively fixed with a top cover 71 and a bottom cover 72. The bottom cover 72 of the filter element 7 has a convex ring 73 structure, and the convex ring 73 can be inserted into the installation hole to form an axial nested fit. To achieve the sealed connection between the filter element 7 and the installation table 10, a first O-ring 9 is installed on the upper surface of the installation table 10, and the bottom cover 72 of the filter element 7 abuts against the first O-ring 9, and end face sealing is achieved through the first O-ring 9. At the same time, a second O-ring 19 is sleeved in a groove 74 on the convex ring 73. The second O-ring 19 is sleeved on the circumference of the convex ring 73 and forms a sliding seal with the inner wall of the installation hole. The double-seal structure can effectively avoid gas leakage.

[0037] As Figure 4 shown, after the pull rod 8 passes through the through hole in the center of the filter element 7, an axial pre-tightening force is applied through the flat step of the sealing nut 3 connected by threads at the top. A sealing gasket 5 is arranged between the flat step and the top cover 71, so that the sealing of the top of the filter element 7 can be achieved.

[0038] An inlet nozzle 13 and an outlet nozzle 20 are welded to the cylinder body 6. The inlet nozzle 13 is located below the filter element 7, passes through the side wall of the cylinder body 6 and communicates with the combined nozzle 12. The outlet nozzle 20 is on the upper side wall of the cylinder body 6 and communicates with the inner cavity of the cylinder body 6. By adopting the design of low gas inlet and high outlet, the gas to be purified is introduced into the equipment through the inlet nozzle 13, enters the filter element 7 through the combined nozzle 12. The filter element 7 captures the oil vapor and impurity particles in the gas, and the purified gas is then led out of the equipment through the outlet nozzle 20. The filter element 7 mainly intercepts the oil vapor, and the impurity particles will be pushed out of the filter element 7 under the action of the internal and external pressure difference and partially fall to the bottom of the cylinder body 6, and are discharged together with the condensate water by the drain valve 15.

[0039] The combined nozzle 12 is in a flared shape, larger at the top and smaller at the bottom, optimizing the flow channel and minimizing the gas pressure drop. The filter media of the filter element 7 is made by a folding process, increasing the filtration area and further reducing the gas pressure drop.

[0040] Embodiment 2:

[0041] On the basis of Embodiment 1, the present invention also circumferentially arranges a plurality of balance blocks 11 around the mounting table 10. The balance blocks 11 are located between the mounting table 10 and the inner wall of the cylinder body 6, and can adjust the levelness of the mounting table 10 and the perpendicularity with the inner wall of the cylinder body 6. The balance blocks 11 are fixed to the mounting table 10 by rotating the locknut 18, correcting the spatial position deviation between the mounting table 10 and the axis of the cylinder body 6, and ensuring the coaxiality between the filter element 7 and the cylinder body 6.

[0042] Embodiment 3:

[0043] On the basis of Embodiment 1 and Embodiment 2, the present invention also welds a pressing plate 2 inside the end cover 1. The pressing plate 2 is provided with through holes, which enables the pressing plate 2 to be sleeved on the sealing nut 3, and a spring 4 is also sleeved on the sealing nut 3. When the two flanges are locked, the pressing plate 2 can compress the spring 4 downward, making the spring 4 abut against the flat step of the sealing nut 3. While pressing the sealing gasket 5 against the top cover 71, it also generates a downward pressure on the filter element 7, so that the first O-ring 9 is pressed by the bottom cover 72 and the mounting table 10. Through the above settings, it can not only dynamically compensate for the wear of the sealing gasket 5 and the first O-ring 9 by the spring 4, but also buffer the impact of the air flow on the filter element 7.

[0044] The filter media adopts a multi-layer composite structure, which has a better capture effect on microscopic particles such as oil vapor in the gas.

[0045] During assembly, the filter element 7 is inserted into the cylinder body 6 from the top of the device. The filter element 7 is sleeved on the pull rod 8 and is preliminarily fixed on the mounting table 10 through the pull rod 8 and the fixing piece 17. The top plane of the mounting table 10 and the radial hole surface of the mounting hole are hermetically sealed in a double - seal manner through the first O - ring and the second O - ring respectively. To ensure the sealing stability and the uniform deformation degree of the O - rings, the parallelism and perpendicularity of the mounting table 10 with the cylinder wall are adjusted through the balance weight 11 and fixed by the anti - loosening screw 18. A sealing nut 3 and a sealing gasket 5 are installed at the top of the pull rod 8. By using the sealing nut 3, the filter element 7 can be tightened on the mounting table 10, further increasing the deformation amounts of the first O - ring and the sealing gasket 5 and enhancing the sealing performance. The pull rod 8 is movably inserted into the fixing piece 17 but cannot be pulled out upward and detached. A pressing plate 2 is welded inside the end cover 1, and a compression spring 4 is welded at the center of the pressing plate 2. When the end cover 1 is closed, the spring 4 is sleeved on the flat step of the sealing nut 3. The end cover 1 is locked on the cylinder body 6 through fasteners such as bolts 22, and the spring 4 is gradually compressed, pressing the filter element 7 tightly on the mounting table 10. On the one hand, it can enhance the sealing effect of the first O - ring, and on the other hand, it can ensure that the filter element 7 will not become loose or damaged due to the pulsation of the air flow and the vibration of the pipeline during the operation of the device.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A deep purification filter, characterized in that: include: A cylinder (6), wherein the top of the cylinder (6) is provided with an end cover (1), and the bottom of the cylinder (6) is provided with a sewage discharge structure; A mounting platform (10), the mounting platform (10) being arranged in the cylinder (6), the mounting platform (10) being provided with a mounting hole, a filter element (7) for filtering oil and gas being sealed and mounted on the mounting platform (10), and a limiting structure for pressing the filter element (7) against the mounting platform (10) being arranged in the cylinder (6); A combined pipe (12), wherein the combined pipe (12) is sealedly connected to the air inlet at the bottom of the filter element (7) through the mounting hole; An air intake pipe, the air intake pipe passes through the side wall of the cylinder (6) and is connected to the combined pipe (12); An air outlet pipe, the air outlet pipe passes through the side wall of the cylinder (6) and is in communication with the inner cavity of the cylinder (6); The gas enters the filter element (7) from the air inlet pipe, enters the inner cavity of the cylinder (6) after being filtered by the filter element (7), and is discharged from the air outlet pipe.

2. A deep purification filter as claimed in claim 1, characterized in that: The limiting structure comprises a fixing plate (17) arranged in the combined connecting pipe (12), a pull rod (8) is inserted into the fixing plate (17), the pull rod (8) passes through the axis of the filter element (7), and a sealing nut (3) is arranged on the top of the pull rod (8) for supporting the filter element (7).

3. A deep purification filter as claimed in claim 2, characterized in that: A top cover (71) is fixed to the top of the filter element (7), and a sealing gasket (5) is provided between the plane step of the sealing nut (3) and the top cover (71).

4. A deep purification filter as claimed in claim 3, characterized in that: A pressure plate (2) is fixed inside the end cover (1), a spring (4) is arranged at the bottom center of the pressure plate (2), and the spring (4) rests on the plane step of the sealing nut (3).

5. A deep purification filter as claimed in claim 1, characterized in that: A balancing block (11) is provided between the mounting platform (10) and the inner wall of the cylinder (6), and the balancing block (11) is used to adjust the coaxiality between the mounting platform (10) and the cylinder (6).

6. A deep purification filter as claimed in claim 5, characterized in that: The balancing block (11) is fixed on the mounting platform (10) via a locking screw (18).

7. A deep purification filter as claimed in claim 1, characterized in that: A bottom cover (72) is fixed to the bottom of the filter element (7), a convex ring (73) is fixed on the bottom cover (72), the convex ring (73) is inserted into the mounting hole, a first O-ring (9) is arranged between the mounting platform (10) and the bottom cover (72), and a second O-ring (19) is arranged between the convex ring (73) and the inner wall of the mounting hole.

8. A deep purification filter as claimed in claim 1, characterized in that: The air inlet pipe is located at the lower side of the filter element (7), and the air outlet pipe is higher than the air inlet pipe.

9. A deep purification filter as claimed in claim 1, characterized in that: The sewage discharge structure comprises a sewage discharge valve (15) arranged at the bottom of the cylinder (6).

10. A deep purification filter as claimed in claim 1, characterized in that: Flanges are welded on the end cover (1) and the cylinder (6), the two flanges are fixedly connected by a fastener (22), and a third O-ring (21) is arranged between the two flanges.

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