CN209809694U - Explosion-proof type prefilter - Google Patents
Explosion-proof type prefilter Download PDFInfo
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- CN209809694U CN209809694U CN201822127474.9U CN201822127474U CN209809694U CN 209809694 U CN209809694 U CN 209809694U CN 201822127474 U CN201822127474 U CN 201822127474U CN 209809694 U CN209809694 U CN 209809694U
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Abstract
The utility model relates to the technical field of filters, a leading filter of explosion-proof type is disclosed, including the connector and with the filtering component that the connector is connected, a serial communication port, filtering component includes the shell body, locates filter core in the shell body and locating the shell body with form the compressible hollow body in the space between the filter core. The utility model discloses to environmental suitability strong, can prevent that the low temperature frost crack phenomenon from appearing, be favorable to reducing the cost expenditure.
Description
Technical Field
The invention relates to the technical field of filters, in particular to an explosion-proof type prefilter.
Background
In the current bathroom market, fully automatic flushing toilets are increasingly being popularized and used. Although intelligent closestool brings a lot of convenience, comfortablely for people's life, because the closestool is abluent the user private position, consequently to the quality requirement of water than higher, the water that intelligent closestool used is direct to derive comparatively purer from the running water company, but water process long distance pipeline transmission back, because secondary pollution such as silt rust in the pipeline can produce debris and lead to the quality of water to worsen, the user can not be relieved completely, safe use intelligent closestool, in addition, quality of water is not good can also cause the influence to the life of intelligent closestool equipment itself.
In order to solve the above problems, a filter is introduced to filter impurities in water for reuse, such as "an easy-to-detach intelligent toilet prefilter" disclosed in patent document No. CN207056043U, which has a water inlet and two water outlets, a first water outlet is connected to the intelligent toilet, a second water outlet is connected to the water outlet device, and the water outlet end of the filter element assembly is connected to the second water outlet, that is, the water outlet of the second water outlet is filtered water, and the water outlet of the first water outlet is unfiltered water.
Also, for example, patent document CN108704365A discloses "a pre-filter for an intelligent toilet. At present, because part extremely cold area is very easy to freeze because of low temperature water winter, especially in the environment that water flow potential energy is less, this has just led to current filter in the use, and water deposit in its filter cavity meets extremely cold climate, and the inflation that freezes very easily causes the filter cavity to prop brokenly, props the phenomenon emergence that splits or destroys the sealed mode of original design and leads to leaking, has influenced intelligent closestool's normal use. Therefore, how to effectively prevent freezing and explosion is a problem which needs to be solved urgently by the filter for the intelligent closestool at present.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides an explosion-proof pre-filter which can prevent the low-temperature frost cracking phenomenon and reduce the cost.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a leading filter of explosion-proof type, including the connector and with the filtering component that the connector is connected, filtering component includes the shell body, locates filter core in the shell body and locating the shell body with form the compressible hollow body in the space between the filter core.
In the above scheme, increase compressible hollow body setting and be in the shell body with in forming the space between the filter core, compressible hollow body sets to and can keep size integrality under municipal water pressure, keep hollow state and do not influence rivers and pass through, when the water freezes the inflation in the shell body, the compressible hollow body of extrusion, make compressible hollow body compressive deformation, vacate the space, the produced stress of inflation that freezes is released, thereby reduce the possibility that the shell integument propped or propped the fracture, structural design is simple not only, still make the leading filter of this scheme possess the frost-resistant good performance of low temperature, be favorable to reducing user's cost, user experience has been improved.
Further, the outer shell comprises a cylindrical part and a dome part which is arranged at the top end of the cylindrical part and integrally formed with the cylindrical part, the compressible hollow body is a hollow ball, the hollow ball is arranged in an inner cavity formed by the dome part, and the bottom end of the cylindrical part is opened and is in conduction connection with the connecting head.
Furthermore, a hollow connecting part which is integrally formed with the bottom end of the cylindrical part is arranged at the bottom end of the cylindrical part, a threaded part is arranged at one end of the hollow connecting part close to the bottom end of the cylindrical part, and an extending part is arranged at the other end of the hollow connecting part; the outer surface of the threaded part is provided with threads, the outer surface of the extending part is provided with at least one first groove, and a first sealing ring is arranged in each first groove; the connector be equipped with be used for with the butt joint mouth that cavity connecting portion are connected, be equipped with in the butt joint mouth and be used for accepting the accepting groove of stretching into the portion, the inner wall in accepting groove with first sealing washer is hugged closely, be equipped with to the interface internal surface be used for with the internal thread of screw-thread fit spiro union.
Furthermore, the caliber of the thread part is larger than that of the extending part, a plurality of limiting protrusions distributed in a circumferential array are arranged on the end face, connected with the extending part, of the end face of the thread part in a protruding mode in the extending direction of the extending part, and the lower end face of each limiting protrusion is abutted to the upper end face of the receiving groove.
Furthermore, a second groove is formed in the outer surface of the end part of the water outlet end of the filter element, and a second sealing ring is arranged in the second groove.
Furthermore, the connector is provided with a water inlet, a butt joint port, a first water outlet and a second water outlet, and the outer shell is connected with the connector through the butt joint port; wear to be equipped with the drain pipe in the connector, the end of intaking of drain pipe passes the interface with the play water end of filter core is connected, the second sealing washer with the inner wall of the end of intaking of drain pipe is hugged closely, the play water end of drain pipe passes first delivery port and through lock nut with connector detachably connects.
Further, the connector with filter component detachably connects.
Furthermore, a plurality of reinforcing ribs are arranged on the outer surface of the outer shell in a protruding mode, and the plurality of reinforcing ribs extend to the bottom end along the top end of the outer shell and are distributed at equal intervals.
Furthermore, the outer shell comprises a cylindrical part and a flat top part which is arranged at the top end of the cylindrical part and is integrally formed with the cylindrical part, and the upper surface of the flat top part is a plane and is sunken downwards to form a reinforcing groove.
Furthermore, the compressible hollow body is provided with an air outlet, the air outlet is integrally formed with an exhaust pipeline used for discharging gas in the compressible hollow body to the outside of the outer shell, the outer shell is provided with a through hole penetrating through the outer shell, and the air outlet end of the exhaust pipeline is in sealed butt joint with the through hole.
After the technical scheme is adopted, the invention has the beneficial effects that: the compressible hollow body is additionally arranged in a gap formed between the outer shell and the filter element, so that water in the gap formed between the outer shell and the filter element can be firstly squeezed to vacate a space when the water is frozen and expanded, the stress action of pressure released by expansion on the outer shell is reduced, and the possibility of the outer shell being broken is reduced; preferably, the compressible hollow body can compress when and only when being subjected to pressure and has resilience performance, namely, when the ice in the outer shell is changed into water again, the compressible hollow body can restore to a hollow state so as to bear the stress release of the icing expansion of the water at the next time;
the outer shell is provided with a dome top, the compressible hollow body is a hollow ball, the hollow ball is arranged on the dome top, on one hand, the dome shape of the top of the outer shell is favorable for strengthening the compression and cracking resistance of the top of the outer shell, on the other hand, the compressible hollow body is limited on the dome top, so that the space can be effectively vacated, the stress action of pressure released by expansion on the outer shell is reduced, and the compression and cracking resistance reliability is improved;
the hollow connecting part is provided with a thread part and an extending part, the connector is provided with a butt joint which is matched with the thread part to form a screw joint, and the connection is tight and the installation and the disassembly are convenient; the receiving groove and the extending part are spliced, and the first sealing ring is tightly attached to the inner wall of the receiving groove to form sealing, so that the sealing property of the joint of the connector and the filtering assembly is improved, and the joint is prevented from leaking water;
the arrangement of the limiting protrusion is beneficial to increasing the structural strength of the hollow connecting part and preventing freezing and cracking on one hand, and is convenient to be matched with the receiving groove to limit the extending degree of the extending part, so that the filter assembly is prevented from being excessively screwed into the connector to influence the smoothness of a water path, and the threaded part and the extending part of the hollow connecting part are matched, so that the technical difficulty of the installation of the filter assembly is reduced, and the tightness and the reliability are good after the installation;
the end part of the water outlet end of the filter element is provided with a second sealing ring, the connector is provided with a water discharge pipe, and the inner wall of the water inlet end of the water discharge pipe is tightly attached to the second sealing ring to form sealing, so that the leakage of filtered water is avoided, and the water purification efficiency is guaranteed;
the connector is detachably connected with the filtering component, so that the water purifying effect is guaranteed by only replacing the filtering component, and the resource waste is reduced;
set up to be equipped with the venthole on the compressible hollow body, venthole department integrated into one piece has exhaust duct, exhaust duct's the end of giving vent to anger and the sealed design of butt joint of through-hole, when making the compressible hollow body receive the expanded pressure that freezes, air in it can discharge to the greatest extent, the volume in vacating the space has been increased, be favorable to further reducing the shell body and strut the possibility broken or burst, and the hollow inner chamber of compressible hollow body and the communicating above-mentioned design in external world, can make things convenient for follow-up through toward interior filling hot water, set up the mode of heating member and timing heating, avoid the emergence of icing phenomenon, thereby solve leading filter from the root and can't freeze proof explosion-proof problem under low temperature state.
Drawings
In order to more clearly illustrate embodiments of the present invention or prior art solutions, the drawings are as follows:
FIG. 1 is a schematic structural view of a prefilter provided in example 1 of the present invention;
FIG. 2 is a sectional view of a disassembled structure of a pre-filter provided in example 2 of the present invention;
fig. 3 is a schematic structural view of a hollow connecting portion provided in embodiment 2 of the present invention;
FIG. 4 is a sectional view showing the overall structure of a prefilter provided in example 3 of the present invention;
fig. 5 is a cross-sectional view of a filter assembly according to example 4 of the present invention.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example 1
As shown in fig. 1, the embodiment provides an explosion-proof prefilter, which includes a connector 100 and a filter assembly 200 connected to the connector 100, where the filter assembly 200 includes an outer housing 210, a filter element 220 disposed in the outer housing 210, and a compressible hollow body 230 disposed in a gap formed between the outer housing 210 and the filter element 220. The compressible hollow body 230 has a hollow inner cavity, and can be compressed and deformed, and the shape thereof can be diversified, such as spherical shape, rectangular parallelepiped shape, etc., it should be noted that, in this embodiment, the outer surface of the compressible hollow body 230 has no air leakage treatment, and in order to prevent the reduction of the filtration efficiency of the pre-filter of the present solution due to the addition of the compressible hollow body 230, the size of the cavity of the outer housing 210 can be properly enlarged according to the volume and the contour of the compressible hollow body 230 on the original basis. The volume of the hollow interior of the compressible hollow body 230 can be estimated based on the volume of disposable water stored in the filter assembly 200, the volume of the disposable water stored after it has been completely frozen, and the acceptable expansion coefficient of the outer housing 210.
Specifically, the structural arrangement of the connection head 100 and the connection manner of the connection head 100 and the filter assembly 200 can refer to the design of the filter applied to the intelligent toilet in the prior art, for example, the design disclosed in patent document CN207056043U, and the installation and matching of the filter element 220 and the outer shell 210 can also refer to the existing design, which is not described herein in detail, it should be emphasized that, a compressible hollow body 230 is disposed in the void formed between the outer housing 210 and the filter element 220, in order not to affect the efficiency of the filter element 220 in filtering water, the compressible hollow body 230 is fixed relative to the gap formed between the outer housing 210 and the filter element 220, and does not move with the water flow, and does not block the contact surface of the filter element 220 and water, for example, placing the compressible hollow body 230 against and secured to the inner wall of the outer housing 210, preferably with the inner wall of the outer housing 210 covering the compressible hollow body 230; in order to prevent municipal water pressure from squeezing the compressible hollow body 230, which would cause the compressible hollow body 230 to be in a compressed state for a long period of time when water flows through, thereby affecting the effective space vacation when water freezes at a later stage, the compressible hollow body 230 is selected from a material that can maintain the integrity of the volume in the municipal water pressure, i.e., the water will flow around the compressible hollow body 230 when flowing, and will not squeeze the compressible hollow body 230, and the compressible hollow body 230 will be squeezed and deformed only when the water freezes; in order for the compressible hollow body 230 to withstand the stress release of the next water freezing expansion, the compressible hollow body 230 needs to be designed to have a better elastic coefficient, which ensures that the compressible hollow body can recover to a hollow state when the ice turns into water and is not subjected to an expansion force.
In the above scheme, the compressible hollow body 230 is additionally arranged in the gap formed between the outer shell 210 and the filter element 220, the compressible hollow body 230 is arranged to keep the integrity of the body under municipal water pressure, the hollow state is kept and the water flow is not influenced, when the water in the outer shell 210 freezes and expands, the expanded ice can slowly squeeze the compressible hollow body 230 to make the compressible hollow body 230 compress and deform, so as to vacate the space for storing the expanded ice, after the stress generated by partial freezing and expansion is released, the stress of the outer shell 210 can be reduced, so as to reduce the possibility that the outer shell 210 is propped or propped, the pre-filter of the embodiment has simple structural design, can control the design and manufacturing cost, also has excellent low-temperature anti-freezing performance, and is beneficial to reducing the cost caused by replacing the damaged pre-filter by a user, the environmental adaptability is enhanced, and the user experience is improved.
Example 2
As shown in fig. 2, the present embodiment is different from embodiment 1 in that the outer housing 210 includes a cylindrical portion and a dome portion 211 integrally formed at the top end of the cylindrical portion, the compressible hollow body 230 is preferably a hollow ball, the hollow ball is disposed in an inner cavity formed by the dome portion 211, and the bottom end of the cylindrical portion is open and is in fluid connection with the connection head 100.
Specifically, a stop part for stopping the dome part 211 from separating from the inner cavity of the dome part 211 is arranged at the joint of the dome part 211 and the cylinder part, an opening at the bottom end of the cylinder part can be connected and communicated with the connector 100 in an integrated manner, and can be detachably connected with the connector 100 in a threaded manner as described in the patent document with the publication number of CN207056043U, the former is favorable for reducing the node design with water leakage risk, the latter is favorable for separately discarding and replacing the filter assembly, the use cost is saved, and the installation and replacement time is saved, and the connector 100 is detachably connected with the bottom end of the cylinder part in fig. 2.
The dome portion 211 is designed in a dome shape, namely a hemispherical space is formed at the top of the outer shell 210, on one hand, top load can be converted into axial compressive stress of an arch, the strength of the outer shell 210 is increased, on the other hand, the compressible hollow body 230 can be designed into a hollow sphere and is arranged in an inner cavity formed by the dome portion 211, so that the hollow sphere is limited at the dome portion 211, the water purifying efficiency of the filter element is not affected, the generated compressive stress can be partially guided and released to the dome portion 211 provided with the hollow sphere when water turns into ice, more stress can be released by extruding the hollow sphere to vacate the space, and the strength of the dome portion 211 is higher, so that the possibility that the outer shell 210 is cracked due to icing expansion is greatly reduced, and the compression resistance, the low temperature and the crack resistance of the product are better. Further, a plurality of ribs may be extended from the top end to the bottom end of the dome portion 211 of the outer case 210 to increase the structural strength of the outer case 210 as a whole.
Preferably, the bottom end of the cylindrical part is provided with a hollow connecting part integrally formed with the cylindrical part, the hollow connecting part is hollow, both ends of the hollow connecting part are open, one end of the hollow connecting part close to the bottom end of the cylindrical part is provided with a threaded part 212, and the other end of the hollow connecting part is provided with an extending part 213; the threaded part 212 is integrally connected with the bottom end of the cylindrical part, threads are arranged on the outer surface of the threaded part 212, a first groove is formed in the outer surface of the extending part 213, the number of the first grooves is at least one, and a first sealing ring 2131 is arranged in each first groove; the connector 100 is provided with a butt joint port 110 for being connected with the hollow connecting part, a receiving groove 111 for receiving the extending part 213 is arranged in the butt joint port 110, the inner wall of the receiving groove 111 is tightly attached to the first sealing ring 2131, and an internal thread for being in threaded connection with the thread is arranged on the inner surface of the butt joint port 110. The receiving groove 111 is located in the docking port 110 and has a cross-sectional area smaller than that of the docking port 110, and a groove edge thereof may be disposed spaced apart from the inner surface of the docking port 110 as shown in fig. 2 or may be disposed coincident with the inner surface of the docking port 110.
During the installation, will stretch into portion 213 and insert to form the cooperation to interface 110 and accepting groove 111 earlier, first sealing washer 2131 hugs closely with the inner wall of accepting groove 111 and forms the connection and the sealing of first aspect, then rotates whole filter assembly for screw thread and interior screw-thread fit are screwed and are formed the connection and the sealing of second aspect, can improve the leakproofness of connector 100 and filter assembly 200 junction greatly, are favorable to avoiding the junction to leak. In addition, the installation mode of grafting and spiro union combined use is also comparatively simple, and the installation degree of difficulty is not high, is difficult to appear the system that the installation is improper leads to and leaks, and filter assembly 200 changes convenient quick, and leak protection water reliability is good.
Further, as shown in fig. 3, the diameter of the threaded portion 212 is larger than the diameter of the protruding portion 213, an end surface of the threaded portion 212 connected to the protruding portion 213 (i.e., an end surface of the threaded portion 212 relatively protruding from the protruding portion 213) is provided with a plurality of limiting protrusions 2121 distributed in a circumferential array protruding toward the extending direction of the protruding portion 213, a lower end surface of the limiting protrusion 2121 abuts against an upper end surface of the receiving groove 111, and it should be noted that the lower end surface of the limiting protrusion 2121 abuts against an upper end surface of a protruding groove edge of the receiving groove 111, not an upper end surface of a groove bottom of the receiving groove 111. The design of spacing arch 2121 can play the effect of strengthening whole cavity connecting portion structural strength on the one hand, prevent that the cavity connecting portion from breaking because of freezing, on the other hand can cooperate the restriction with the groove limit of accepting groove 111 and stretch into the degree that stretches into portion 213, avoid filter element 200 excessively to screw in connector 100 and influence the water route unblocked, spacing arch 2121 separates screw thread portion 212 and accepting groove 111's groove limit simultaneously, be favorable to avoiding screw thread portion 212 to screw the process and receive the extrusion of accepting groove 111's groove limit and damage, influence the leakproofness.
Example 3
As shown in fig. 4, the difference between this embodiment and the previous two embodiments is that a second groove is formed on the outer surface of the water outlet end of the filter element 220, and a second sealing ring 221 is disposed in the second groove.
The connector 100 is provided with a water inlet 120, a butt joint 110, a first water outlet 130 and a second water outlet 140, and the outer shell 210 is connected with the connector 100 through the butt joint 110; wear to be equipped with drain pipe 150 in the connector 100, the end of intaking of drain pipe 150 passes interface 110 with the play water end of filter core 220 is connected, second sealing washer 221 with the inner wall of the end of intaking of drain pipe 150 is hugged closely, the play water end of drain pipe 150 pass first delivery port 130 and through lock nut with connector 100 detachably connects. The outer surface of the water outlet end of the water outlet pipe 150 is provided with an external thread, besides being used for being connected and locked with a locking nut, the external device can be tightly installed, a sealing ring is further fixed and used for being tightly attached to the inner wall of the first water outlet 130, the phenomenon that water in the connector 100 overflows from a gap between the inner walls of the water outlet pipe 150 and the first water outlet 130 is avoided, the connection between the preposed filter and other devices in the intelligent closestool is convenient, the connector is formed by the water inlet 120 and the second water outlet 140 in a uniform body mode, and the connector can be an internal thread or an external thread.
In order to ensure the quality of filtered water, the filter needs to be replaced after a certain period of time (usually 3-5 months), so that the filter has the excellent characteristic of convenient replacement, and the connector 100 is detachably connected with the filter assembly 200 in the present embodiment, and the detachable connection includes screwing, buckling, etc. When in replacement, only the filter assembly 200 needs to be disassembled and replaced, and the filter assembly is abandoned to be in a semi-throw type, thereby being beneficial to reducing the cost and saving the resources; further, in the present embodiment, the outer housing 210 and the filter element 220 are detachably disposed, so that resources can be further saved by replacing only the filter element 220.
A plurality of reinforcing ribs 214 are protruded from the outer surface of the outer housing 210, and the plurality of reinforcing ribs 214 extend from the top end to the bottom end of the outer housing 210 and are distributed at equal intervals. Which is advantageous to improve the structural strength of the outer case 210.
The outer housing 210 includes a cylindrical portion and a flat top portion integrally formed at a top end of the cylindrical portion, and an upper surface of the flat top portion is a plane and is recessed downward to form a reinforcing groove. The reinforcing grooves are inwards sunken, and the effect of improving the structural strength of the flat top part is also achieved. Preferably, the stiffening grooves are cross-shaped grooves. In this embodiment, the compressible hollow body 230 has a rectangular outer shape and is fixed to the flat top and the inner wall of the cylindrical portion.
Example 4
As shown in fig. 5, the present embodiment is different from the previous embodiments in that an air outlet is formed on the compressible hollow body 230, an air exhaust duct 231 for exhausting the air in the compressible hollow body 230 to the outside of the outer housing 210 is integrally formed at the air outlet, the outer housing 210 is provided with a through hole penetrating through the outer housing 210, and an air outlet end of the air exhaust duct 231 is in sealed butt joint with the through hole. The end of giving vent to anger of exhaust duct 231 and the sealed butt joint of through-hole can be integrated into one piece's connection, also can be for the sealed grafting of the end of giving vent to anger of exhaust duct 231 in the through-hole for no gap is between exhaust duct 231 outer wall and the through-hole inner wall.
Specifically, the compressible hollow body 230 is provided with an air outlet, an air exhaust pipeline is integrally formed at the air outlet, and the air outlet end of the air exhaust pipeline 231 is in sealed butt joint with the through hole, so that when the compressible hollow body 230 is subjected to the pressure of freezing and expansion, air in the compressible hollow body can be exhausted to the outside of the outer shell 210 from the through hole to the maximum extent, the volume of an vacated space is increased, and the possibility of the outer shell cracking or bursting is further reduced; the compressible hollow body 230 of the present embodiment can be used for containing heat-releasing liquid in addition to air as in the previous embodiments, thereby preventing water in the filter assembly 200 from freezing, and if freezing occurs, the contained liquid can be discharged from the through hole due to the compression deformation of the compressible hollow body 230, without affecting the low temperature crack resistance.
Preferably, a heat conducting liquid and a heating pipe are arranged in the compressible hollow body 230, the heating pipe is connected with a controller through a conducting wire, and the controller is used for controlling the size of heat released by the heating pipe and the heating time. In order to deform the compressible hollow body 230 without damaging the placement of the heating tube, it is preferred that the heating tube be arranged with its length extending perpendicular to the direction of ice expansion. The design is favorable for playing a certain heat conduction role for water circulating between the compressible hollow body 230 and the filter element 220, thereby slowing down or avoiding the occurrence of the icing phenomenon, and fundamentally solving the problem that the pre-filter cannot freeze and explosion resistance due to the icing of the water in the low-temperature state.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The utility model provides a leading filter of explosion-proof type, including the connector and with the filtering component that the connector is connected, its characterized in that, filtering component includes the shell body, locates filter core in the shell body and locating the shell body with form the compressible hollow body in the space between the filter core.
2. An explosion proof pre-filter according to claim 1 wherein the outer housing comprises a cylindrical part and a dome part integrally formed at the top end of the cylindrical part, the compressible hollow body is a hollow ball, the hollow ball is disposed in an inner cavity formed at the dome part, and the bottom end of the cylindrical part is open and is in conduction connection with the connector.
3. An explosion proof pre-filter according to claim 2 wherein the bottom end of the cylindrical portion is provided with a hollow connecting portion integrally formed therewith, the hollow connecting portion being provided with a threaded portion at one end adjacent the bottom end of the cylindrical portion and an extending portion at the other end; the outer surface of the threaded part is provided with threads, the outer surface of the extending part is provided with at least one first groove, and a first sealing ring is arranged in each first groove; the connector be equipped with be used for with the butt joint mouth that cavity connecting portion are connected, be equipped with in the butt joint mouth and be used for accepting the accepting groove of stretching into the portion, the inner wall in accepting groove with first sealing washer is hugged closely, be equipped with to the interface internal surface be used for with the internal thread of screw-thread fit spiro union.
4. An explosion-proof prefilter as claimed in claim 3 wherein the diameter of said threaded portion is greater than the diameter of said protruding portion, and the end surface of said threaded portion adjacent to said protruding portion has a plurality of circumferentially arrayed stop protrusions protruding in the direction of extension of said protruding portion, and the lower end surfaces of said stop protrusions abut against the upper end surfaces of said receiving slots.
5. An explosion-proof prefilter as claimed in claim 1 wherein a second recess is formed in the outer surface of the end of said filter element at the water outlet end, and a second sealing ring is disposed in said second recess.
6. An explosion proof pre-filter according to claim 5, wherein the connector is provided with a water inlet, a butt joint, a first water outlet and a second water outlet, and the outer housing is connected with the connector through the butt joint; wear to be equipped with the drain pipe in the connector, the end of intaking of drain pipe passes the interface with the play water end of filter core is connected, the second sealing washer with the inner wall of the end of intaking of drain pipe is hugged closely, the play water end of drain pipe passes first delivery port and through lock nut with connector detachably connects.
7. An explosion proof pre-filter as set forth in claim 1 wherein said connector is removably connected to said filter assembly.
8. An explosion proof pre-filter as defined in claim 1, wherein the outer surface of the outer housing is provided with a plurality of ribs protruding therefrom, the plurality of ribs extending from the top end to the bottom end of the outer housing and being equally spaced apart therefrom.
9. An explosion proof pre-filter as set forth in claim 1 wherein said outer housing includes a cylindrical portion and a flat top portion integrally formed with and at the top end of said cylindrical portion, the upper surface of said flat top portion being flat and downwardly concave to form said reinforcing channel.
10. An explosion-proof prefilter as claimed in claim 1 wherein said compressible hollow body is provided with an air outlet, said air outlet being integrally formed with an exhaust duct for exhausting air from said compressible hollow body to the exterior of said outer housing, said outer housing being provided with a through hole extending through said outer housing, said exhaust duct having an air outlet end in sealed abutment with said through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822127474.9U CN209809694U (en) | 2018-12-19 | 2018-12-19 | Explosion-proof type prefilter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822127474.9U CN209809694U (en) | 2018-12-19 | 2018-12-19 | Explosion-proof type prefilter |
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| Publication Number | Publication Date |
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| CN209809694U true CN209809694U (en) | 2019-12-20 |
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| CN201822127474.9U Active CN209809694U (en) | 2018-12-19 | 2018-12-19 | Explosion-proof type prefilter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529441A (en) * | 2018-12-19 | 2019-03-29 | 福州三协智能科技有限公司 | A kind of explosion-proof type fore filter |
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2018
- 2018-12-19 CN CN201822127474.9U patent/CN209809694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109529441A (en) * | 2018-12-19 | 2019-03-29 | 福州三协智能科技有限公司 | A kind of explosion-proof type fore filter |
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