CN215692441U - Filter - Google Patents

Abstract

The utility model relates to the field of filters, in particular to a filter, which comprises a shell, wherein an inlet and an outlet are arranged on the shell; the shell comprises a cylinder body and a head part, one end of the cylinder body is open, a cavity is formed inside the cylinder body, and the head part is detachably fixed to the open end of the cylinder body in a sealing mode; a filter element located within the housing, the filter element being removably sealed to the head by a fitting at a first end thereof; still include spacing subassembly, this spacing subassembly includes: the radial limiting piece is arranged in the cavity and is abutted against the filter element so as to limit the radial swing of the filter element; and the axial limiting piece is pressed against the radial limiting piece and used for supporting the filter element to prevent the filter element from falling off from the head part. Can carry out axial support and radial support to the filter core, avoid the filter core to drop in the head, avoid the filter core to swing and striking cavity in the cavity simultaneously.

Description

Filter

Technical Field

The utility model relates to the field of filters, in particular to a filter.

Background

In the industries of battery industry, hydrogen energy industry, deep cooling and the like, certain requirements are required on the use precision of gas, and the gas needs to be filtered; during the filtration of gases, the gases typically enter the filter at high flow rates (10-15 m/s), which presents a significant challenge to the internal structural requirements of the filter. In the prior art, a larger gap is left between the periphery of the filter element and the inner wall of the cylinder, so that on one hand, the feed gas can be uniformly dispersed on the whole periphery of the filter element, the utilization rate of the filter medium of the filter element deviating from the inlet side is improved, the filtering rate is accelerated, and the service life of the filter element is prolonged; on the other hand, the flow velocity is greatly improved after the gas enters the cylinder, so that the filter element is impacted with higher strength; however, in practice, the existing filter element fixing mode has insufficient fixing acting force on the filter element, and gas entering the cylinder body still can impact the filter element greatly; the gap between the periphery of the filter element and the inner wall of the cylinder body is larger, and the filter element can swing left and right relative to the cylinder body in a larger amplitude and even fall off from the head.

In view of this, the present application is specifically made.

Disclosure of Invention

The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and to provide a filter.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

a filter comprises a housing provided with an inlet and an outlet; the shell comprises a cylinder body and a head part, one end of the cylinder body is open, a cavity is formed inside the cylinder body, and the head part is detachably fixed to the open end of the cylinder body in a sealing mode; a filter cartridge having opposite first and second ends and located within the housing, the filter cartridge being removably sealed to the head by a fitting at the first end thereof; still include spacing subassembly, this spacing subassembly includes: the radial limiting piece is arranged in the cavity and is abutted against the filter element so as to limit the radial swing of the filter element; and the axial limiting piece is pressed against the radial limiting piece and used for supporting the filter element to prevent the filter element from falling off from the head part.

Through the technical scheme, the filter element can be conveniently replaced by the barrel body and the head which are arranged in a split manner in the using process, so that the convenience is improved, and the using cost is reduced; in addition, the disassembled filter can respectively clean the head and the barrel, and is more convenient and faster compared with an integrated filter; meanwhile, the existence of the radial limiting piece can enable the filter element to be subjected to supporting force in the radial direction, and noise generation and filter element damage caused by the fact that the filter element swings in the radial direction to impact the inner wall of the cavity are avoided; the axial limiting piece can enable the filter element to receive supporting force in the axial direction and prevent the filter element from falling off from the head part; in addition, the radial limiting piece is pressed by the axial limiting piece, so that the radial limiting piece is abutted against the second end, and the stability of the radial limiting piece on the radial support of the filter element is further improved.

Further, radial locating part includes fixed cover and elastic ring, the elastic ring configuration is on the periphery of fixed cover and is supported with the inner wall of barrel.

Through above technical scheme, the spring coil interval is between fixed cover and cavity inner wall, turns into the soft contact with the hard contact between fixed cover and the cavity inner wall, can reduce noise and vibration in the filtering process effectively.

Furthermore, the radial limiting piece is arranged at the second end of the filter element, and the fixing sleeve is provided with a clamping part matched with the second end of the filter element.

Through the technical scheme, the fixing sleeve can be sleeved on the peripheral part of the second end to fill the gap between the periphery of the second end and the inner wall of the cavity, so that the filter element is prevented from swinging radially to a large extent.

Furthermore, the periphery of the fixed sleeve is provided with an installation groove, the elastic ring is arranged in the installation groove, and the compression amount of the elastic ring is 5-12%.

Through the technical scheme, the friction force between the radial limiting piece and the inner wall of the cavity can be in a reasonable interval, and the radial limiting piece is prevented from being difficultly arranged at a proper position of the cavity; meanwhile, the fixed sleeve is prevented from impacting the inner wall of the cavity in the use process of the filter.

Further, the axial limiting piece comprises a spring seat and a spring, and the spring seat is provided with an outer peripheral surface matched with the bottom of the cylinder body; the spring is mounted on the spring seat.

Through the technical scheme, the axial support can be effectively provided for the filter element, and the phenomenon that the filter element falls off from the head part to cause that liquid cannot be filtered is prevented. In addition, the spring holder is adapted with the cavity bottom, and the structure that the spring is fixed on the spring holder can further increase the stability that the spring supported the filter core.

Furthermore, the spring is pressed on the fixing sleeve, and the spring and the filter element are coaxially arranged.

Through above technical scheme, can avoid fixed cover to break away from the second end of filter core effectively, lose the radial support of filter core. Through the spring that sets up with the filter core is coaxial, can further increase the stability to filter core axial bracing.

Furthermore, the fixed sleeve is provided with a ventilation channel for balancing the air pressure of the space at two sides of the fixed sleeve in the cavity, and the ventilation channel comprises a ventilation hole and a ventilation groove; when filtering gas, the gas to be filtered flows to the air holes from the air permeable groove.

Through above technical scheme, can avoid when the filter uses, the atmospheric pressure that is located fixed cover top space is greater than the below space, makes fixed cover downstream lose the radial support of filter core.

Further, the seal assembly includes a seal ring disposed between the head and the barrel, and a clamp for compressing the head and the barrel. The head is provided with an annular bulge, the sealing ring is sleeved on the outer wall of the annular bulge, and the line diameter of the sealing ring is larger than the thickness of the annular bulge.

Through above technical scheme, can be with head and barrel sealing connection, avoid the clearance leakage of the fluid of filtering in the barrel from the two to appear the filter.

Further, the cross-sectional area of the cavity is S1, the cross-sectional area of the filter element is S2, and the area of the inlet is S3; S1-S2 > S3.

Through above technical scheme, can effectively reduce the velocity of flow that the fluid got into the cavity to reduce the impact force of fluid to the filter core, reduce the swing of filter core.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description only relate to some embodiments of the present invention and are not limiting on the present invention.

FIG. 1 is a schematic diagram of the general structure of the first embodiment;

FIG. 2 is a schematic view of the head of FIG. 1;

FIG. 3 is a schematic view of the cartridge of FIG. 1;

FIG. 4 is a schematic structural view of the stop assembly of FIG. 1;

fig. 5 is a schematic view of the pouch of fig. 4;

FIG. 6 is a schematic perspective view of FIG. 5;

FIG. 7 is a schematic structural view of the spring seat of FIG. 4;

fig. 8 is an enlarged schematic view at a in fig. 1.

Reference numerals:

1. a head portion; 11. an inlet; 12. an outlet; 13. an inflow channel; 14. an outflow channel; 15. an exhaust port; 16. an annular protrusion; 17. a guide surface; 2. a barrel; 21. an opening; 22. a cavity; 23. a sewage draining outlet; 3. a limiting component; 31. an elastic ring; 32. fixing a sleeve; 321. mounting grooves; 322. a clamping part; 323. air holes are formed; 324. a ventilation groove; 325. a stress groove; 33. a spring; 34. a spring seat; 341. a blocking portion; 342. a card slot; 343. a support portion; 344. a through hole; 4. a filter element; 41. a joint; 5. clamping a hoop; 6. a seal ring; D. and (4) thickness.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of this patent does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used only to indicate relative positional relationships that may change when the absolute position of an object being described is changed, and are merely for convenience in describing the utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

The first embodiment is as follows:

referring to fig. 1 to 8, the present invention provides a filter, which includes a housing, the housing having an inlet 11 and an outlet 12; the shell comprises a cylinder body 2 and a head part 1, one end of the cylinder body 2 is opened to form an opening 21, a cavity 22 is formed inside the cylinder body 2, and the head part 1 is detachably fixed to the opening 21 of the open end of the cylinder body 2 in a sealing mode; the cylinder 2 is a long cylindrical extension, which is formed by casting. In addition, the inner wall of the cavity 22 is smooth without unevenness and dead corners, so that the barrel 2 is convenient to clean. The head part 1 is made of metal, the inlet 11 and the outlet 12 are arranged on the opposite side surfaces of the head part 1, the head part 1 is also provided with an inflow channel 13 and an outflow channel 14, the inflow channel 13 is connected with the inlet 11, and the outflow channel 14 is connected with the outlet 12; the inlet channel 13 has a baffle wall 18, the baffle wall 18 being arranged perpendicular to the inlet 11, the arrangement being such that the gas entering the filter through the inlet 11 hits the baffle wall 18 effectively dissipating kinetic energy and reducing the flow rate of the gas entering the cavity 22. The filter element 4 is positioned in the shell, the filter element 4 is detachably sealed on the head part 1 through a joint 41 at a first end of the filter element, in the embodiment, a groove is arranged at the first end, and a sealing ring is preset on the groove; the first end is pre-connected with the outflow channel 14 through a sealing ring arranged in an interference manner after extending into the outflow channel 14. With this design, the filter cartridge 4 can be first pre-fixed to the head 1 and then inserted into the cavity 22 of the cartridge body 2 when the filter is assembled. It should be noted that the filter element 4 in this embodiment is a trap filter element 4, and the gas that enters the cavity 22 from the inflow channel 13 can enter the inside of the filter element 4 from the outer periphery of the filter element 4 and then be discharged from the outflow channel 14.

As shown in fig. 1, the filter further includes a limiting assembly 3, and the limiting assembly 3 includes: the radial limiting piece is arranged in the cavity and is abutted against the filter element 4, and in the embodiment, the radial limiting piece is arranged at the second end part of the filter element 4 and is used for filling a gap between the periphery of the filter element 4 and the inner wall of the barrel body 2 so as to limit the radial swinging of the filter element 4; this radial locating part can radially support filter core 4, avoids filter core 4 striking cavity inner wall after receiving gaseous impact force. And an axial stopper which presses the radial stopper and supports the filter element 4 to prevent the filter element 4 from falling off the head 1. In addition, the axial limiting structure in the embodiment can make the cylinder body 2 adapt to various filter elements 4, namely when the length of the filter element 4 is less than the inner depth of the cavity 22, the length can be compensated through the axial limiting element, so that the filter element 4 can be stably positioned in the cavity 22.

In addition, it should be noted that the radial limiting element in the present embodiment is disposed at the second end of the filter element 4; in another embodiment, a radial stop can also be provided between the first end (not included) and the second end (included) of the filter insert 4, so as to fill the gap between the filter insert 4 and the inner wall of the cavity, preventing the filter insert 4 from swinging in the radial direction; of course, the radial limiting member can also be abutted against the filter element 4 and fixed below the second end, that is, only the radial limiting member needs to transmit the radial swinging force of the filter element 4 to the inner wall of the cavity.

Specifically, as shown in fig. 4, 5 and 6, the radial position limiting element in this embodiment includes a fixing sleeve 32 and an elastic ring 31, the fixing sleeve 32 is a hollow annular structure with multiple steps formed by lathing, and includes an upper portion, a middle portion and a lower portion, wherein the upper portion is provided with a clamping portion 322, the clamping portion 322 is adapted to the second end of the filter element 4, the middle portion has a vent 323, and the lower portion has a force receiving groove 324; the air holes 323 and the air holes 324 are communicated, that is, the air in the air holes 323 can enter the lower space of the fixed sleeve 32 through the force-bearing groove 324; further, the fixing cover 32 has: a mounting groove 321 located at the outer circumference of the fixing sleeve 32; and the ventilation grooves are provided with 4 strips, and are formed by extending inwards from the outer peripheral surface of the fixing sleeve 32 and connecting the ventilation holes 323. Specifically, the method comprises the following steps:

the clamping portion 322 is adapted to the second end of the filter element 4, and the bottom wall and the inner side wall of the clamping portion 322 are adapted to the shape of the second end of the filter element 4, so that the second end can sink into the clamping portion 322, and when the filter element 4 is radially impacted by gas, the impact force can be transmitted to the inner side wall of the clamping portion 322. The elastic ring 31 is arranged on the periphery of the fixed sleeve 32 and is abutted against the inner wall of the cylinder 2, and the fixed sleeve 32 can be effectively prevented from being in hard contact with the inner wall of the cylinder 2 through the elastic ring 31. It should be noted that, when the filter of the present invention is used, the flow velocity of the gas entering the cylinder 2 will reach 10 to 15m/s, and under the impact of the gas with the flow velocity, the filter element 4 in the prior art will continuously impact the inner wall of the cylinder 2, so that the material of the filter element 4 is knocked down, and the filtering effect is reduced; in addition, the filter element 4 continuously impacting the inner wall of the cavity 22 generates great noise and vibration, which greatly affects the use experience; after the fixing sleeve 32 and the elastic ring 31 are used, the above situation can be effectively avoided. It should be further noted that the elastic ring 31 in this embodiment is made of silicone or rubber.

In another embodiment, the fixing sleeve 32 is also arranged on the inner wall of the cavity, and the fixing sleeve 32 is provided with an elastic ring 31 on the inner wall for clamping the filter element 4; the elastic ring 31 abuts against the filter element 4 to restrict the filter element 4 from swinging in the radial direction.

Further, as shown in fig. 5 and 6, the installation groove 321 is horizontally disposed, the elastic ring 31 is disposed in the installation groove 321, and the compression amount of the elastic ring 31 is 5 to 12%, more specifically, 8%. It should be noted that, when the compression amount is less than 5%, the periphery of the fixing sleeve 32 still impacts the inner wall of the cavity 22 under the impact of the gas, which generates noise and vibration and affects the use of the fixing sleeve 32; when the compression amount is greater than 12%, the friction force between the elastic ring 31 and the inner wall of the cavity 22 is too large, which causes the radial position-limiting member to be difficult to be placed at the preset position inside the cavity 22, and also causes the elastic force of the axial position-limiting member to overcome the friction force between the elastic ring 31 and the inner wall of the cavity 22, and the proper function is lost. In addition, it should be noted that, for the sake of simple structure, the fixing sleeve 32 in the present embodiment is provided with only one spring 33 ring, and in another embodiment, a plurality of spring 33 rings may be provided to increase the stability of the radial limiting member.

As shown in fig. 5 and 6, the air-permeable passage is used to equalize the air pressure in the space between the two sides of the pouch 32 in the cavity. The ventilation channel comprises a ventilation hole 323 and 4 ventilation grooves 324, in this embodiment, the ventilation hole 323, the filter element 4 and the spring 33 are coaxially arranged, the ventilation grooves 324 are arranged on the periphery of the ventilation hole 323 in a circular array, and when gas is filtered, the gas to be filtered flows to the ventilation hole 323 from the ventilation grooves 324. It should be noted that, if the ventilation channel is not provided, when the gas to be filtered enters the cavity 22, the air pressure in the space above the fixing sleeve 32 is greater than that below the fixing sleeve 32, and the fixing sleeve 32 axially moves downward under the action of the air pressure, so that the fixing sleeve is separated from the filter element 4 and loses the radial limiting function. In addition, since the air hole 323 is positioned below the second end, since the shape of the locking part 322 is matched with the second end, the air positioned at the upper part of the fixing sleeve 32 is difficult to enter into the air hole 323 from the space of the locking part 322, and passes through the air hole groove 324, thus solving the problem.

As shown in fig. 4 and 7, the axial stopper includes a spring seat 34 and a spring 33, and the spring seat 34 has an outer peripheral surface adapted to the bottom of the cylinder 2. When the filter is assembled, the axial limiting piece of the adaptive cylinder body 2 and the filter element 4 can be selected, so that the outer peripheral surface of the spring seat 34 is attached to the bottom wall of the cavity 22 to increase the stability of the axial limiting piece. The spring 33 is mounted on the spring seat 34, and in this embodiment, one end of the spring 33 is fixed on the spring seat 34, so that the spring 33 can be placed into the cavity 22 together with the spring seat 34, and the other end of the spring is pressed against the bottom of the fixed sleeve 32, so that the supporting force from the spring 33 is transmitted through the fixed sleeve 32, and the first end and the second end of the filter element 4 can be always located at the preset positions.

It should be noted that, the spring 33 presses the fixing sleeve 32, so that the fixing sleeve 32 is prevented from being separated from the filter element 4 in the use process, and the synchronism of the filter element 4 and the fixing sleeve 32 is maintained, thereby further increasing the stability of the radial limiting element for limiting the radial swing of the filter element 4.

Further, the spring seat 34 in this embodiment is a housing, and the material thereof extends inward to form a support portion 343 and a blocking portion 341, and a clamping groove 342 is formed between the support portion 343 and the blocking portion 341; one end of the spring 33 is clamped in the clamping groove 342. The stopper 341 and the support 343 are annular, the circular gap at the center of the stopper 341 is smaller than the outer diameter of the spring 33, and the support ring located below the spring 33 can be inserted into the engaging groove 342 from the circular gap at the center of the stopper 341, but cannot be axially removed from the engaging groove 342. In addition, a force-bearing groove 325 is coaxially arranged on the fixing sleeve 32 and the clamping part 322, and the support ring above the spring 33 extends into the force-bearing groove 325 and acts on the fixing sleeve 32.

It should be noted that the spring 33 of the present embodiment is disposed coaxially with the filter element 4, which can increase the stability of the filter element 4. The spring 33 in this embodiment is replaceable to fit the filter cartridge 4 with different lengths inside the barrel 2.

As shown in fig. 8, the gas filter of the present embodiment further includes a seal assembly including a packing 6 disposed between the head 1 and the cylinder 2, and a band 5 for press-fitting the head 1 and the cylinder 2. The head part 1 is provided with an annular protrusion 16, the sealing ring 6 is sleeved on the outer wall of the annular protrusion 16, the line diameter of the sealing ring 6 is larger than the thickness of the annular protrusion 16, and the thickness refers to a reference sign D in the figure. So designed, can avoid the gas that is located in cavity 22 from leaking from the space between barrel 2 and head 1. In addition, as shown in fig. 7, the head 1 of the present embodiment is further provided with a guide surface 17 adapted to the clip 5, so that the clip 5 can be easily connected to the barrel 2 and the head 1, and the sealing performance between the two can be increased. In the conventional technique, the head 1 and the cylinder 2 are also screwed together by a screw, and this type of connection makes it difficult to clean dirt inside the screw.

Setting the cross-sectional area of the cavity 22 as S1, the cross-sectional area of the filter element 4 as S2, and the area of the inlet 11 as S3; S1-S2 > S3, i.e. the flow area of the gas to be filtered inside the cavity 22 is larger than that of the inlet 11, so that the flow speed of the gas inside the cavity 22 can be reduced, and the impact of the gas on the filter element 4 can be reduced.

The filter of the present invention can be used for filtering liquid, and the flow path for filtering liquid is the same as that for filtering gas. Further, when used for filtering liquid, the filter of the present invention may further use two gas discharge ports 15, one of the gas discharge ports 15 being located above the inflow channel 13 for discharging gas from the unfiltered liquid; which is located above the outflow channel 14 and serves to evacuate the gases from the filtered liquid, preventing them from blocking the liquid to be filtered from passing through the filter element 4 under the action of the gas pressure.

In addition, the filter of the present invention has a drain outlet 23, which drain outlet 23 is located at the lowermost portion of the cylinder 2 and serves to drain away the deposited contaminant impurities in the cylinder 2 and the impurities washed off the filter element 4 when the filter element 4 is backwashed. Further, a through hole 344 is formed in the spring seat 34, and the through hole 344 facilitates the dirt to enter the dirt discharging port 23.

The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A filter comprising a housing having an inlet and an outlet disposed thereon; the shell comprises a cylinder body and a head part, one end of the cylinder body is open, a cavity is formed inside the cylinder body, and the head part is detachably fixed to the open end of the cylinder body in a sealing mode; a filter cartridge having opposite first and second ends and located within the housing, the filter cartridge being removably sealed to the head by a fitting at the first end thereof; its characterized in that still includes spacing subassembly, and this spacing subassembly includes:

the radial limiting piece is arranged in the cavity and is abutted against the filter element so as to limit the radial swing of the filter element;

and the axial limiting piece is pressed against the radial limiting piece and used for supporting the filter element to prevent the filter element from falling off from the head part.

2. The filter of claim 1, wherein the radial stop comprises a retaining sleeve and an elastic ring disposed on the outer periphery of the retaining sleeve and abutting the inner wall of the cylinder.

3. The filter of claim 2, wherein the radial stop is disposed at the second end of the filter element, and the retaining sleeve has a detent that mates with the second end of the filter element.

4. The filter of claim 2, wherein the fixing sleeve is provided at an outer circumference thereof with a mounting groove, the elastic ring is disposed in the mounting groove, and a compression amount of the elastic ring is 5-12%.

5. The filter of claim 2, wherein the axial stop comprises a spring seat and a spring, the spring seat having an outer peripheral surface that conforms to the bottom of the cavity; the spring is mounted on the spring seat.

6. A filter according to claim 5, characterised in that the spring bears against the fixing sleeve and is arranged coaxially with the filter insert.

7. A filter as claimed in claim 2 or 6, wherein said fixing sleeve is provided with a ventilation channel for balancing the air pressure in the space at the two sides of the fixing sleeve in the cavity, said ventilation channel comprising a ventilation hole at the end of the fixing sleeve and a ventilation slot at the side wall of the fixing sleeve; when filtering gas, the gas to be filtered flows to the air holes from the air permeable groove.

8. The filter of claim 1, further comprising a seal assembly including a seal ring disposed between the head and the bowl, and a clamp for compressing the head and the bowl.

9. The filter of claim 8, wherein the head is provided with an annular projection, the sealing ring is fitted over an outer wall of the annular projection, and a linear diameter of the sealing ring is greater than a thickness of the annular projection.

10. The filter of claim 1, wherein, assuming a cavity cross-sectional area of S1, a cartridge cross-sectional area of S2, and an inlet area of S3; S1-S2 > S3.

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