CN202590481U

CN202590481U - Filter with decompressing function

Info

Publication number: CN202590481U
Application number: CN 201220196040
Authority: CN
Inventors: 叶秀友; 梁建林; 彭开勤; 覃涛
Original assignee: Zhejiang Qinyuan Water Treatment Technology Co Ltd
Current assignee: Zhejiang Qinyuan Water Treatment Technology Co Ltd
Priority date: 2012-05-04
Filing date: 2012-05-04
Publication date: 2012-12-12
Anticipated expiration: 2022-05-04

Abstract

The utility model discloses a filter with a decompressing function. The filter comprises a filter core, a filter shell and a filter cover, wherein the filter cover is provided with a water inlet concave cavity which is in clamping fit with the filter core, and a water outlet channel which is communicated with a water purifying chamber of the filter shell; the filter cover is provided with a radial water inlet channel; a throttling hole passing through the upper end face of the filter cover and a guide hole passing through the lower end face of the filter cover are formed in the radial water inlet channel respectively; the water inlet concave cavity is provided with a water inlet guide hole passing through the upper end face of the filter cover; the throttling hole and the guide hole are hermetically matched with an upper outer cover of the filter cover and a lower outer cover of the filter cover respectively; the upper outer cover of the filter cover is encircled into a water inlet connecting channel; the throttling hole and the guide hole construct a decompressing valve cavity which is in sliding fit with a valve core assembly; an annular gap is reserved between a valve plug of the valve core assembly and the water inlet port of the throttling hole; and the valve core assembly is used for adjusting the size of an annular gap in a sliding way under the action of water current pressure in the radial water inlet channel for changing the throttling area of the throttling hole, so that an automatic decompressing function is realized.

Description

A kind of filter that carries decompression

Technical field

The utility model relates to the purifier field, and relating in particular to needs earlier the fore filter of former water through the filter filtration, specifically a kind of filter that carries decompression.

Background technology

Purifier all is directly to be connected with the municipal tap water pipe usually; The hydraulic pressure of existing municipal tap water is also unstable; Unsettled hydraulic pressure is easy to generate water hammer purifier is damaged; Perhaps purifier is damaged,, so just greatly reduce the service life of purifier to such an extent as to cause equipment to leak because hydraulic pressure is too high.In the prior art, be not damaged with the protection purifier in certain safe range in order to reduce hydraulic pressure or stabilize water pressure energy, people generally are employed in the method for on the pipeline before the purifier pressure-reducing valve being installed separately.Though this method can play a very good protection to purifier; But its manufacturing cost is higher relatively; And particularly it installs and uses especially extremely inconvenience in narrow limited space, thereby also there is certain defective in this kind method, a kind of more succinct pressure reducing mode of market demand.

Summary of the invention

The utility model technical problem to be solved is to above-mentioned prior art present situation, and provides simple in structure, dependable performance and need not a kind of filter that carries decompression of equipped pressure-reducing valve separately.This filter can effectively prevent water hammer or the too high destruction of causing of hydraulic pressure, thereby has longer service life.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of filter that carries decompression; Comprise that inside is equipped with the filter housing of filter core and the strainer cover that is equipped with the filter housing sealing; The exhalant canal that strainer cover is shaped on the water inlet cavity of joining with the filter core sealed card respectively and is connected with water purifying chamber in the filter housing; Strainer cover is shaped on the stomatodeum of radially intaking; Be shaped on concentric in this stomatodeum of radially intaking respectively and connect the throttle orifice of strainer cover upper surface and the correcting hole of perforation strainer cover lower surface; The water inlet cavity is shaped on the water inlet guide hole that connects the strainer cover upper surface; Throttle orifice and correcting hole seal closure respectively are furnished with on the strainer cover outer cover under the outer cover and strainer cover, and the space that outer cover surrounds on the strainer cover constituted the water inlet interface channel that is used to be communicated with throttle orifice and water inlet guide hole, and the decompression valve pocket has been formed in throttle orifice and correcting hole together; Slide in this decompression valve pocket and be fitted with core assembly; Leave the annular gap that moves up and down between the water inlet port of the valve plug of core assembly and throttle orifice, core assembly receive radially the to intake size of the effect slidable adjustment annular gap of water flow pressure in the stomatodeum changes the orifice size of throttle orifice, realizes decompression purpose automatically.

For optimizing technique scheme, the measure of taking also comprises:

Above-mentioned core assembly comprises that slip is located in the valve rod in throttle orifice and the correcting hole and is sleeved on upward compression spring, valve plug and the lower compression spring on the valve rod from top to bottom successively; Valve plug is fixing equipped mutually with valve rod; The two ends of lower compression spring respectively with the lower surface of valve plug and strainer cover under outer cover apical grafting mutually; Outer cover contacts mutually on the end that last compression spring is arranged in water interface channel into and should goes up the compression spring and the strainer cover, and the other end matches with locking plate roof pressure on being fixed on valve rod.

The water inlet port expansion of above-mentioned throttle orifice is shaped on the endoporus conical seal (contact) face; And the bottom of this endoporus conical seal (contact) face is formed with the spacing flat surface of thrust, and correspondingly valve plug is shaped on cylindrical conical seal (contact) face that matches with the endoporus conical seal (contact) face and the upper surface that cooperates with the spacing flat surface location thrust of thrust.

Above-mentioned valve rod and valve plug are a whole workpiece; And this valve rod is provided with the pressure adjusting pad; The bottom of lower compression spring outer cover roof pressure under pressure adjusting pad and strainer cover matches, on the strainer cover under outer cover and the strainer cover outer cover be pressed with cover sealing ring and cover sealing ring down respectively.

The top and bottom of above-mentioned filter core side face are embedded with sealing ring and filter core lower seal on the filter core respectively; Strainer cover water inlet cavity sealing ring on filter core clamps with the filter core sealing mutually, matches with the inner wall sealing of filter housing through the filter core lower seal in the lower end of filter core.

Above-mentioned filter core is divided into two chambers with the inside of filter housing; Water purifying chamber in the filter housing is made up of the space that the internal perisporium of the periphery wall of filter core and filter housing surrounds; The space that diapire enclosed of the inner chamber of filter core and the bottom surface of filter core and filter housing has constituted the filter chamber; The filter chamber is connected with the water inlet cavity, and described water purifying chamber and filter chamber have constituted two inner chambers of filter housing.

Above-mentioned strainer cover is shaped on the connection convex mouth equipped mutually with filter housing; This connection convex mouth is shaped on the convex mouth internal thread; Be shaped on the shell external screw thread that matches with the convex mouth internal thread on the filter housing; And be shaped on sealed groove on the filter housing, be embedded with the body seal circle in the sealing groove, strainer cover compresses sealing with filter housing through the body seal circle and is equipped with mutually.

Be shaped on the installation projection on the upper surface of above-mentioned strainer cover, spiral is equipped with Pressure gauge on this installation projection, and the center that projection is installed is shaped on the detection water channel that is communicated with Pressure gauge and water inlet cavity.

The diapire center of above-mentioned filter housing connects and is shaped on the bottom valve installing port, and the bottom valve installing port is fitted with the connection valve seat that is shaped on the flushing water passage, and this connection valve seat is used to install the stifled or flushing valve of valve, and the flushing water passage is connected with the filter chamber.

The water inlet of the above-mentioned stomatodeum of radially intaking and the delivery port of exhalant canal all are shaped on the convenient outer connecting thread that links to each other with extraneous pipeline.

Compared with prior art; The strainer cover of the utility model is shaped on the stomatodeum of radially intaking; The decompression valve pocket of forming through the throttle orifice that is shaped on the stomatodeum of radially intaking and correcting hole is slidingly fitted with core assembly, and the valve plug that relies on core assembly and the matched in clearance of throttle orifice change the orifice size of throttle orifice, makes radially intake flow velocity and the kinetic energy change of fluid of former water of stomatodeum of entering; Cause the different pressure losses, thereby reach the purpose of decompression.The filter of the utility model makes preposition purifier possess decompression, thereby need not before preposition purifier, to install specially pressure-reducing valve again, and having solved for a long time, purifier needs independent equipped pressure-reducing valve problem.This filtration device structure is reasonable, and with low cost, dependable performance can effectively prevent the too high destruction that purifier is caused of hydraulic pressure, the working life that can prolong purifier greatly.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the assembly structure sketch map of Fig. 1 middle filtrator lid and core assembly;

Fig. 3 is the structural representation of core assembly among Fig. 1;

Fig. 4 is the structural representation of Fig. 1 middle filtrator lid;

Fig. 5 is the assembly structure sketch map of filter core and filter housing among Fig. 1.

The specific embodiment

Embodiment to the utility model describes in further detail below in conjunction with accompanying drawing.

Fig. 1 to 5 is depicted as the technological principle sketch map of the utility model.

Reference numeral wherein is: annular gap D; Filter core 1; Sealing ring 11 on the filter core; Filter core lower seal 12; Filter housing 2; The 2a of filter chamber; The 2b of water purifying chamber; Shell external screw thread 21; Sealed groove 22; Body seal circle 23; Bottom valve installing port 24; Connect valve seat 25; Flushing water passage 251; Strainer cover 3; Outer connecting thread 3a; Water inlet cavity 31; Water inlet guide hole 32; Throttle orifice 34; Endoporus conical seal (contact) face 341; The spacing flat surface 342 of thrust; Correcting hole 35; The stomatodeum 36 of radially intaking; Exhalant canal 37; Connect convex mouth 38; Convex mouth internal thread 381; Projection 39 is installed; Detect water channel 391; Outer cover 41 on the strainer cover; Water inlet interface channel 411; Outer cover 42 under the strainer cover; Cover sealing ring 43; Under cover sealing ring 44; Core assembly 5; Valve rod 51; Last compression spring 52; Valve plug 53; Cylindrical conical seal (contact) face 531; Upper surface 532; Lower surface 533; Lower compression spring 54; Locking plate 55; Pressure adjusting pad 56; Pressure gauge 6.

Fig. 1 is to shown in Figure 5; A kind of filter that carries decompression of the utility model; Comprise that inside is equipped with the filter housing 2 of filter core 1 and the strainer cover 3 that is equipped with filter housing 2 sealings; The exhalant canal 37 that strainer cover 3 is shaped on the water inlet cavity 31 of joining with filter core 1 sealed card respectively and is connected with the 2b of water purifying chamber in the filter housing 2; Wherein: the other end of strainer cover 3 on the same diameter line relative with the delivery port of exhalant canal 37 is shaped on the stomatodeum 36 of radially intaking; Be shaped on concentric in this stomatodeum 36 of radially intaking respectively and connect the throttle orifice 34 of strainer cover 3 upper surfaces and the correcting hole 35 of perforation strainer cover 3 lower surfaces; Water inlet cavity 31 is shaped on the water inlet guide hole 32 that connects strainer cover 3 upper surfaces; Throttle orifice 34 and correcting hole 35 seal closure respectively are furnished with on the strainer cover outer cover 42 under the outer cover 41 and strainer cover, and the space that outer cover 41 surrounds on the strainer cover constituted the water inlet interface channel 411 that is used to be communicated with throttle orifice 34 and water inlet guide hole 32, and throttle orifice 34 has been formed the decompression valve pocket together with correcting hole 35; Slide in this decompression valve pocket and be fitted with core assembly 5; Leave the annular gap D that moves up and down between the valve plug 53 of core assembly 5 and the water inlet port of throttle orifice 34, core assembly 5 receive radially the to intake size of the effect slidable adjustment annular gap D of water flow pressure in the stomatodeum 36 changes the orifice size of throttle orifice 34, realizes decompression purpose automatically.The filter of the utility model and traditional filter in comparison mainly are on strainer cover 3, to have great innovation; The stomatodeum 36 of radially intaking of strainer cover 3 realized with being communicated with through throttle orifice 34, water inlet interface channel 411 and water inlet guide hole 32 of 31 of water inlet cavitys; And between the connection of radially intake stomatodeum 36 and water inlet cavity 31, make throttle orifice 34 and correcting hole 35 form the pressure-reducing valve cavity configuration cleverly; The matched in clearance of valve plug 53 with throttle orifice 34 through the core assembly 5 installed in the valve pocket in decompression realizes the function of decompression.Compare prior art; The filter of the utility model is suitable for preposition installation; Make preposition purifier possess the function of self-decompression, thereby reduced preposition purifier the trouble of pressure-reducing valve independently and huge because of increase that the cost that independent pressure-reducing valve brings is installed and volume must be installed.The utility model has the advantages that: delicate structure, reasonable in design, use cost is low, can prevent the too high destruction that purifier is caused of hydraulic pressure effectively, thereby the working life that has prolonged purifier greatly.

Among the embodiment, as shown in Figure 3, core assembly 5 comprises that slip is located in the valve rod 51 in throttle orifice 34 and the correcting hole 35 and is sleeved on upward compression spring 52, valve plug 53 and the lower compression spring 54 on the valve rod 51 from top to bottom successively; Valve plug 53 is fixing equipped mutually with valve rod 51; The two ends of lower compression spring 54 respectively with the lower surface of valve plug 53 533 and strainer cover under outer cover 42 apical grafting mutually; Outer cover 41 contacts mutually on the end that last compression spring 52 is arranged in water interface channel 411 into and should goes up compression spring 52 and the strainer cover, and the other end matches with locking plate 55 roof pressures on being fixed on valve rod 51.The effect through reverse pretension tension of last compression spring 52 and lower compression spring 54 makes valve plug 53 at normal state down and 34 certain annular gap D of maintenance of throttle orifice; After the hydraulic pressure in the stomatodeum 36 of radially intaking increases suddenly; Hydraulic pressure and 54 actings in conjunction of the lower compression spring pressure on valve plug 53 lower surfaces 533 increases; The imbalance of pressure that compression spring 52 and lower compression spring 54 are preset; The resistance of 53 compression springs 52 on overcoming under the effect of hydraulic pressure and lower compression spring 54 of valve plug is up, regulates the size of annular clearance D, thereby has controlled the orifice size of throttle orifice 34.

Among the embodiment; The water inlet port expansion of throttle orifice 34 is shaped on endoporus conical seal (contact) face 341; And the bottom of this endoporus conical seal (contact) face 341 is formed with the spacing flat surface 342 of thrust, and correspondingly valve plug 53 is shaped on cylindrical conical seal (contact) face 531 that matches with endoporus conical seal (contact) face 341 and the upper surface 532 that cooperates with the spacing flat surface 342 location thrusts of thrust.Be shaped on the endoporus conical seal (contact) face 341 that matches and can play throttling action better with cylindrical conical seal (contact) face 531, conical design makes the upper surface 532 of valve plug 53 different with lower surface 533 compression areas, has guaranteed the sensitivity of core assembly 5 work.

The single piece that the valve rod 51 and the valve plug 53 of the utility model can adopt a whole processing and fabricating to form; And this valve rod 51 is provided with pressure adjusting pad 56; The bottom of lower compression spring 54 outer cover 42 roof pressures under pressure adjusting pad 56 and strainer cover match, on the strainer cover under outer cover 41 and the strainer cover outer cover 42 be pressed with cover sealing ring 43 respectively and cover sealing ring 44 down.The core assembly 5 of the utility model is provided with pressure adjusting pad 56, can adjust the preload pressure of compression spring through regulating pressure adjusting pad 56, thereby guarantee that valve plug 53 and throttle orifice 34 can be in the operating position an of the best.

Among the embodiment; As shown in Figure 5; The top and bottom of filter core 1 side face are embedded with sealing ring 11 and filter core lower seal 12 on the filter core respectively; Strainer cover 3 water inlet cavitys 31 sealing ring 11 on filter core clamps with filter core 1 sealing mutually, matches through the inner wall sealing of filter core lower seal 12 with filter housing 2 in the lower end of filter core 1.

Like Fig. 1 and shown in Figure 5; Filter core 1 is divided into two chambers with the inside of filter housing 2; The 2b of water purifying chamber in the filter housing 2 is made up of the space that the internal perisporium of the periphery wall of filter core 1 and filter housing 2 surrounds; The space that diapire enclosed of the bottom surface of the inner chamber of filter core 1 and filter core 1 and filter housing 2 has constituted the 2a of filter chamber, and the 2a of filter chamber is connected with

water inlet cavity

31, and 2b of water purifying chamber and the 2a of filter chamber have constituted two chambers of filter housing 2 inside.The filter core 1 of the utility model is embedded with sealing ring, and the inside that reaches filter housing 2 through sealing ring on the filter core of setting-in 11 and filter core lower seal 12 is divided into two chamber purposes.

Among the embodiment; Like Fig. 2, Fig. 4 and shown in Figure 5, strainer cover 3 is shaped on the connection convex mouth 38 equipped mutually with filter housing 2, and this connection convex mouth 38 is shaped on convex mouth internal thread 381; Be shaped on the shell external screw thread 21 that matches with convex mouth internal thread 381 on the filter housing 2; And be shaped on sealed groove 22 on the filter housing 2, be embedded with body seal circle 23 in the sealing groove 22, strainer cover 3 compresses sealing with filter housing 2 through body seal circle 23 and is equipped with mutually.The strainer cover 3 of the utility model adopts spiral equipped mutually with filter housing 2, and for the sealing that guarantees to assemble, filter housing 2 is set with the body seal circle 23 of annular, and body seal circle 23 can prevent the water purification leakage.

Among the embodiment, can find out from Fig. 1, Fig. 2 and Fig. 4 that be shaped on the upper surface of strainer cover 3 projection 39 is installed, spiral is equipped with Pressure gauge 6 on this installation projection 39, the center that projection 39 is installed is shaped on the detection water channel 391 that is communicated with Pressure gauge 6 and water inlet cavity 31.Pressure gauge 6 can be monitored the former water pressure that gets in the filter in real time, to people visual pressure display is provided.

Among the embodiment; The diapire center of filter housing 2 connects and is shaped on bottom valve installing port 24; Bottom valve installing port 24 is fitted with the connection valve seat 25 that is shaped on flushing water passage 251, and this connection valve seat 25 is used to install the stifled or flushing valve of valve, and flushing water passage 251 is connected with the 2a of filter chamber.Owing to exist a large amount of impurity and harmful substance in the former water; Filter core 1 is in long-term use; Filter core 1 can be held back these harmful substances when filtering, and harmful substance is adsorbed on the obstruction that causes filter core on the filter core easily, in order to clean filter core and don't to need the dismounting strainer cover; Therefore the diapire at filter housing 2 is fitted with the connection valve seat 25 that is shaped on flushing water passage 251, so just can reach the purpose of cleaning filter core through reverse water inlet.

Among the embodiment, the delivery port of the water inlet of the stomatodeum of radially intaking 36 and exhalant canal 37 all is shaped on the convenient outer connecting thread 3a that links to each other with extraneous pipeline.

The utility model is to realize reducing hydraulic pressure like this:

When not connecting the municipal tap water; All closely be connected between outer cover and strainer cover on outer cover and the strainer cover under the strainer cover; Simultaneously valve plug receive elastic force that the lower compression spring makes progress with under the acting in conjunction of the downward elastic force of compression spring, valve plug is intake with the suprastomodaeal throttle orifice of radially intaking and is had the annular gap of a setting between the port.

When filter with after the municipal tap water is connected; The municipal tap water is through the filter chamber of the stomatodeum of radially intaking, annular gap, throttle orifice, water inlet interface channel, water inlet guide hole and water inlet cavity inflow filter, because valve plug just received the effect of the downward elastic force of elastic force that the lower compression spring makes progress and last compression spring originally, and between the throttle orifice water inlet port certain annular gap arranged; The power that makes progress that when hydraulic pressure is high more, is applied on the valve plug lower surface is just big more; The power that the elastic force addition that power that this hydraulic pressure makes progress and lower compression spring make progress makes valve rod integral body make progress becomes big, and valve plug will upwards move this moment, and the annular gap between valve plug and the throttle orifice water inlet port is diminished; Thereby changed the orifice size of throttle orifice; The flow velocity of current and the kinetic energy of fluid are changed, cause the different pressure losses, thereby reach the purpose of decompression.

The utility model is to realize like this filtering; The effect of sealing ring after current get into the water inlet cavity because on the filter core of filter core upper end; Make current can only get into the filter chamber that the filter core inner chamber constitutes; Radially towards the filtration and infiltration all around of filter core, flow out from exhalant canal by the entering water purifying chamber that purifies waste water of infiltration in the filter chamber for current.

Claims

1. filter that carries decompression; Comprise the strainer cover (3) that inside is equipped with the filter housing of filter core (1) (2) and is equipped with filter housing (2) sealing; The exhalant canal (37) that described strainer cover (3) is shaped on the water inlet cavity (31) of joining with filter core (1) sealed card respectively and is connected with water purifying chamber (2b) in the filter housing (2); It is characterized in that: described strainer cover (3) is shaped on the stomatodeum of radially intaking (36); Be shaped on the correcting hole (35) that concentric connects the throttle orifice (34) of strainer cover (3) upper surface and connects strainer cover (3) lower surface in this stomatodeum (36) of radially intaking respectively; Described water inlet cavity (31) is shaped on the water inlet guide hole (32) that connects strainer cover (3) upper surface; Described throttle orifice (34) and described correcting hole (35) seal closure respectively are furnished with outer cover (42) under outer cover on the strainer cover (41) and the strainer cover; And the space that outer cover on the described strainer cover (41) surrounds has constituted the water inlet interface channel (411) that is used to be communicated with throttle orifice (34) and water inlet guide hole (32); The decompression valve pocket has been formed in described throttle orifice (34) and described correcting hole (35) together, and sliding in this decompression valve pocket is fitted with core assembly (5), leaves the annular gap (D) that moves up and down between the valve plug (53) of described core assembly (5) and the water inlet port of throttle orifice (34).

2. a kind of filter that carries decompression according to claim 1 is characterized in that: described core assembly (5) comprises that slip is located in the valve rod (51) in described throttle orifice (34) and the described correcting hole (35) and is sleeved on upward compression spring (52), valve plug (53) and the lower compression spring (54) on the valve rod (51) from top to bottom successively; Described valve plug (53) is fixing equipped mutually with valve rod (51); The two ends of described lower compression spring (54) respectively with the lower surface (533) of valve plug (53) and strainer cover under outer cover (42) apical grafting mutually; Describedly go up that outer cover (41) contacts mutually on a end that compression spring (52) is arranged in water interface channel (411) into and should goes up compression spring (52) and the strainer cover, the other end matches with locking plate (55) roof pressure on being fixed on valve rod (51).

3. a kind of filter that carries decompression according to claim 2; It is characterized in that: the water inlet port expansion of described throttle orifice (34) is shaped on endoporus conical seal (contact) face (341); And the bottom of this endoporus conical seal (contact) face (341) is formed with the spacing flat surface of thrust (342), and correspondingly described valve plug (53) is shaped on cylindrical conical seal (contact) face (531) that matches with endoporus conical seal (contact) face (341) and the upper surface (532) that cooperates with the spacing flat surface of thrust (342) location thrust.

4. a kind of filter that carries decompression according to claim 3; It is characterized in that: described valve rod (51) and valve plug (53) are a whole workpiece; And this valve rod (51) is provided with pressure adjusting pad (56); The bottom of described lower compression spring (54) outer cover (42) roof pressure under pressure adjusting pad (56) and described strainer cover matches, and outer cover (42) is pressed with cover sealing ring (43) respectively and covers sealing ring (44) down under outer cover on the described strainer cover (41) and the strainer cover.

5. a kind of filter that carries decompression according to claim 4; It is characterized in that: the top and bottom of described filter core (1) side face are embedded with sealing ring on the filter core (11) and filter core lower seal (12) respectively; Described strainer cover (3) water inlet cavity (31) sealing ring (11) on filter core clamps with filter core (1) sealing mutually, matches through the inner wall sealing of filter core lower seal (12) with filter housing (2) in the lower end of described filter core (1).

6. a kind of filter that carries decompression according to claim 5; It is characterized in that: described filter core (1) is divided into two chambers with the inside of described filter housing (2); Water purifying chamber (2b) in the described filter housing (2) is made up of the space that the internal perisporium of the periphery wall of filter core (1) and filter housing (2) surrounds; The space that diapire enclosed of the bottom surface of the inner chamber of described filter core (1) and filter core (1) and filter housing (2) has constituted filter chamber (2a); Described filter chamber (2a) is connected with described water inlet cavity (31), and described water purifying chamber (2b) and filter chamber (2a) have constituted two inner chambers of filter housing (2).

7. a kind of filter that carries decompression according to claim 6; It is characterized in that: described strainer cover (3) is shaped on the connection convex mouth (38) equipped mutually with filter housing (2); This connection convex mouth (38) is shaped on convex mouth internal thread (381); Be shaped on the shell external screw thread (21) that matches with described convex mouth internal thread (381) on the described filter housing (2); And be shaped on sealed groove (22) on the described filter housing (2), be embedded with body seal circle (23) in the sealing groove (22), described strainer cover (3) compresses sealing with filter housing (2) through body seal circle (23) and is equipped with mutually.

8. a kind of filter that carries decompression according to claim 7; It is characterized in that: be shaped on the upper surface of described strainer cover (3) projection (39) is installed; This installation projection (39) is gone up spiral Pressure gauge (6) is installed, and the center of described installation projection (39) is shaped on the detection water channel (391) that is communicated with Pressure gauge (6) and water inlet cavity (31).

9. a kind of filter that carries decompression according to claim 8; It is characterized in that: the diapire center of described filter housing (2) connects and is shaped on bottom valve installing port (24); Described bottom valve installing port (24) is fitted with the connection valve seat (25) that is shaped on flushing water passage (251); This connection valve seat (25) is used to install the stifled or flushing valve of valve, and described flushing water passage (251) is connected with described filter chamber (2a).

10. a kind of filter that carries decompression according to claim 9 is characterized in that: the water inlet of the described stomatodeum (36) of radially intaking all is shaped on the convenient outer connecting thread (3a) that links to each other with extraneous pipeline with the delivery port of described exhalant canal (37).