CN210687115U

CN210687115U - One-way valve with novel structure

Info

Publication number: CN210687115U
Application number: CN201921514550.XU
Authority: CN
Inventors: 李�雨; 刘志彬
Original assignee: BEIJING STAR LIGHT VITER TRANSMISSION INSTITUTE
Current assignee: BEIJING STAR LIGHT VITER TRANSMISSION INSTITUTE
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-05
Anticipated expiration: 2029-09-12

Abstract

The utility model discloses a new construction check valve, including lower gland, the valve body, the disk seat, a valve core, the valve barrel, the uide bushing, go up gland and flange gland, the filter upper end is located into the water cavity, the inside and play water cavity intercommunication of valve barrel, the inside and valve barrel inner chamber intercommunication of case, the inside spring that is equipped with in upper end in the case, the inside lower lateral wall offsets in spring upper end and uide bushing upper end, the case passes through the spring can slide elastic connection uide bushing from top to bottom inside, be equipped with the valve port under the case between tip and the disk seat upside, the inside upside of disk seat can remove the formula intercommunication through valve port and play water cavity, it is equipped with discharge valve to go up gland upper end middle part, discharge valve passes through the inside intercommunication of exhaust hole and the uide bushing of. The utility model discloses new construction check valve adopts single spring over-and-under type case, and control water under high pressure one-way flow prevents the backward flow phenomenon, overcomes among the working medium particle impurity and causes erosion wear problem for the valve port more, improves life.

Description

One-way valve with novel structure

Technical Field

The utility model relates to a new construction check valve especially relates to a new construction check valve of single spring over-and-under type case with filtering capability.

Background

The existing check valve (also called check valve) mostly adopts a lifting valve core structure for controlling the unidirectional flow of high-pressure water and preventing the backflow phenomenon, the structure is shown in figure 1, when the pressure of a water inlet cavity 01 is greater than that of a water outlet cavity 02, medium pressure pushes a check valve core 03 to overcome the acting force of a spring 04 and open a valve port 05, the valve port 05 consists of a sealing surface 06 of the lower end surface of the valve core 03 and a sealing surface on a valve seat 07, and a medium can flow from the water inlet cavity 01 to the water outlet cavity 02. When the pressure of the water outlet cavity 02 is larger than or equal to that of the water inlet cavity 01, the one-way valve core 03 is automatically closed under the combined action of the medium hydraulic force and the spring 04, and the medium cannot flow to the water inlet cavity 01 from the water outlet cavity 02, so that the one-way flow control of high-pressure water is realized.

The existing check valve has the following defects:

when the working medium of the valve is not high in cleanliness, welding slag, welding beading, impurities, hard particles and other impurities which are washed off and are peeled off by cavitation are generated, the one-way valve works, the valve core 03 moves upwards, high-pressure water rapidly flows from the water inlet cavity 01 to the water outlet cavity 02, huge hydrodynamic force is generated due to sudden change of a flow channel during flowing, impurity particles act on the sealing surface 06 and the guide surface under the action of hydrodynamic force, scratches and pits are formed on the sealing surface 06 and the guide surface, when the valve port 05 is closed, the impurity particles are easily extruded on the sealing surface 06 of the valve port and the sealing surface of the valve seat 07, scratches and pits are also generated, and the valve port is sealed and leaked to cause failure of the valve port.

Disclosure of Invention

The utility model relates to a solve not enough among the prior art and accomplish, the utility model aims at providing an adopt case structure of single spring over-and-under type for control water under high pressure one-way flow, prevent the backward flow phenomenon, through the filter, overcome because of the not high erosion wear problem that causes for the valve port of working medium cleanliness, improve life's new construction check valve.

The utility model discloses a one-way valve with new structure, which comprises a lower gland, a valve body, a valve seat, a valve core, a valve sleeve, a guide sleeve, a filter, an upper gland and a flange gland, wherein the lower gland is detachably fixed on the lower end part of the valve body, the upper gland is detachably fixed on the upper end part of the valve body in a sealing way, the lower end part of the filter is detachably fixed on the lower end part of the valve body in a sealing way through the inner part of the lower gland, the upper end part of the filter is positioned in a water inlet cavity of the valve body, the valve seat is fixed in the valve body in a sealing way, the valve seat is positioned in the water outlet cavity of the valve body and between the water inlet cavity, the guide sleeve is fixed in the upper end of the valve body, the lower end of the guide sleeve is positioned in the water outlet cavity, the valve sleeve is positioned, the interior of the valve core is communicated with the inner cavity of the valve sleeve, the side wall of the top of the valve sleeve is detachably fixed with the lower side wall of the upper end of the guide sleeve, the side wall of the bottom of the valve sleeve is detachably fixed with the upper end wall of the valve seat, a spring is arranged in the upper end of the valve core, the upper end of the spring is abutted against the lower side wall of the inner part of the upper end of the guide sleeve, the valve core can slide up and down through the spring and is elastically connected in the guide sleeve, a valve port is arranged between the lower end of the valve core and the upper side of the valve seat, the upper side of the inner part of the valve seat is detachably communicated with the water outlet cavity through the valve port, the flange gland is fixed on the upper gland, the middle part of the upper gland is provided with an exhaust valve, the middle lower part, the exhaust valve is communicated with the inner part of the guide sleeve through the exhaust hole, and the lower side in the valve seat is communicated with the water inlet cavity through the upper end part of the filter.

The utility model discloses a new construction check valve can also be:

the filter upper end is hollow structure's cylinder and the equipartition is encircled around the outside and is equipped with the filtration pore, the inside downside of disk seat is through filtering pore and intake chamber intercommunication, the tip is solid structure's cylinder under the filter, the solid structure's of the tip under the filter cylinder and the sealed crimping of valve body.

The valve comprises a valve sleeve, a valve core, a valve seat, a valve vent, a valve hole, a valve core, a spring, a valve seat, a valve port, an exhaust hole, a valve seat and an exhaust hole, wherein the valve seat is arranged in the valve sleeve, the valve seat is arranged in the valve seat, and the exhaust hole.

And the upper end surface of the guide sleeve is provided with a threaded through hole for communicating the guide cavity with the exhaust hole.

The valve comprises a valve core, a guide column, a guide cavity, a valve seat, a guide cavity, a guide sleeve and a valve clack, wherein the lower end part of the valve core is provided with the valve clack, the middle upper part of the valve core is provided with the guide column, the guide cavity is positioned inside the guide column, the upper side of the valve seat is in an inverted cone shape, the lower side of the valve clack is provided with a conical sealing surface, the sealing surface and the upper side of the valve seat are provided with the valve port in an inverted cone shape, the valve clack can be.

The upper end of the valve clack is provided with a first water through hole, and the first inner cavity is communicated with the lower end part of the guide inner cavity through the first water through hole.

The guide sleeve upside is equipped with the second limbers hole, the direction cavity pass through the second limbers hole with direction inner chamber upper end with first inner chamber intercommunication sets up.

The valve seat is internally provided with a second inner cavity, the upper side of the second inner cavity is in releasable communication with the water outlet cavity through the valve port, and the lower side of the second inner cavity is communicated with the water inlet cavity through the upper end part of the filter.

The lower gland is provided with a first mounting hole, a first fixing screw penetrates through the first mounting hole to enter the lower end part of the valve body, the lower gland passes through the first fixing screw and the first mounting hole are detachably fixed on the lower end part of the valve body, the flange gland is provided with a second mounting hole, a second fixing screw penetrates through the second mounting hole to enter the upper end part of the valve body, and the flange gland is detachably fixed on the upper end part of the valve body through the second fixing screw and the second mounting hole.

The utility model discloses a valve body, including filter, upper gland, valve body, lower gland, valve seat, upper gland, valve body, upper gland, lower end of filter is equipped with the first seal groove that holds first sealing washer, the filter lower end with the gland is inside to be fixed at the lower end of valve body through the detachable sealed of first sealing washer down, the disk seat is equipped with the second seal groove that holds the second sealing washer, the disk seat passes through the sealed of second sealing washer to be fixed inside in the valve body, it fixes to go up the gland through the detachable sealed of third sealing washer on the valve body upper end, it is equipped with the fourth sealing washer.

The utility model discloses a one-way valve with new structure, which comprises a lower gland, a valve body, a valve seat, a valve core, a valve sleeve, a guide sleeve, a filter, an upper gland and a flange gland, wherein the lower gland is detachably fixed on the lower end part of the valve body, the upper gland is detachably fixed on the upper end part of the valve body in a sealing way, the lower end part of the filter is detachably fixed on the lower end part of the valve body in a sealing way through the inner part of the lower gland, the upper end part of the filter is positioned in a water inlet cavity of the valve body, the valve seat is fixed in the valve body in a sealing way, the valve seat is positioned in the water outlet cavity of the valve body and between the water inlet cavity, the guide sleeve is fixed in the upper end of the valve body, the lower end of the guide sleeve is positioned in the water outlet cavity, the valve sleeve is positioned, the interior of the valve core is communicated with the inner cavity of the valve sleeve, the side wall of the top of the valve sleeve is detachably fixed with the lower side wall of the upper end of the guide sleeve, the side wall of the bottom of the valve sleeve is detachably fixed with the upper end wall of the valve seat, a spring is arranged in the upper end of the valve core, the upper end of the spring is abutted against the lower side wall of the inner part of the upper end of the guide sleeve, the valve core can slide up and down through the spring and is elastically connected in the guide sleeve, a valve port is arranged between the lower end of the valve core and the upper side of the valve seat, the upper side of the inner part of the valve seat is detachably communicated with the water outlet cavity through the valve port, the flange gland is fixed on the upper gland, the middle part of the upper gland is provided with an exhaust valve, the middle lower part, the exhaust valve is communicated with the inner part of the guide sleeve through the exhaust hole, and the lower side in the valve seat is communicated with the water inlet cavity through the upper end part of the filter. Thus, after entering the water inlet cavity, the medium enters the interior of the valve seat through the upper end part of the filter, the medium filters impurities containing larger particles through the filter and then enters the interior of the valve seat, at the moment, the medium filtering larger particle impurities plays an upward hydraulic role on the lower end part of the valve core, when the hydraulic acting force overcomes the downward hydraulic acting force of the medium falling out of the water inlet cavity on the valve core, the self gravity of the valve core and the downward thrust of the spring, the lower end part of the valve core is pushed by the upward hydraulic pressure, the valve core slides upwards in the guide sleeve, the valve port is opened, the medium in the valve seat flows to the water outlet cavity, the water inlet cavity is communicated with the water outlet cavity, when the pressure of the medium at the water inlet port in the water inlet cavity is reduced, the medium at the water outlet port in the water outlet cavity is also reduced, the upward hydraulic pressure at, When the valve core self gravity and the downward thrust of the spring, the valve core slowly slides downwards in the guide sleeve, the volume in the guide sleeve gradually increases, the medium in the water outlet cavity flows into the valve sleeve and the valve core, the downward thrust of the valve core is increased until the valve port is closed, when a power source (such as a water pump) stops working or actively stops working due to faults or a pipeline breaks, the medium pressure in the water inlet cavity is rapidly reduced, the medium in the water outlet cavity (the medium stored in the pipeline or the medium in other connecting pipelines) is still in a high-pressure state, and the medium in the water outlet cavity can rapidly flow back (the medium rapidly flows back to a low-pressure position from the high-pressure position) under the large pressure difference, so that the valve core can also be rapidly closed downwards under the pushing of the medium force, thereby preventing the high-pressure medium from flowing back to the power source, protecting the power source and preventing the medium in, the valve core has the advantages that the system is protected, when the valve core slides upwards in the guide sleeve, the volume of the inner part of the guide sleeve is gradually reduced, the pressure in the inner part of the guide sleeve is increased, a medium in the guide sleeve flows into the water outlet cavity through the inner part of the guide sleeve, meanwhile, the spring is gradually compressed, the pressure in the valve core is increased, the medium in the valve core flows into the water outlet cavity, the upward resistance to the valve core is reduced, gas generated by the medium in the guide sleeve is exhausted through the exhaust valve through the exhaust hole, the medium in the valve seat is filtered by the filter and then contacts the lower end part of the valve core, the valve port is opened, the problem of serious corrosion of the valve port due to insufficient cleanliness of working media is solved, and the valve core has longer.

The utility model discloses a new construction check valve, the advantage that has for prior art is: the valve core structure of single spring lifting type is adopted to control the one-way flow of high-pressure water, so that the backflow phenomenon is prevented, the problem of serious corrosion of a valve port due to low cleanliness of a working medium is solved through a filter, and the service life is prolonged.

Drawings

Fig. 1 is a cut-away view of a prior art check valve of new construction.

Fig. 2 is a sectional view of the check valve of the new structure.

Description of the figures

1 … lower press cover 2 … valve body 3 … valve seat

4 … valve core 5 … valve sleeve 6 … guide sleeve

7 … filter 8 … upper gland 9 … flange gland

10 … spring 11 … port 12 … exhaust valve

13 … air vent 14 … filter hole 15 … first dismounting hole

16 … first lumen 17 … guide lumen 18 … guide lumen

19 … screw through hole 20 … clack 21 … guide column

22 … sealing surface 23 … first water through hole 24 … second water through hole

25 … second lumen 26 … first set screw 27 … second removable hole

28 … second set screw 29 … first seal ring 30 … second seal ring

31 … third seal 32 … fourth seal 33 … third hole for dismounting

34 … fourth assembling and disassembling hole 35 … first adapter tube 36 … first circular flange

37 … second connecting pipe 38 … second round flange 39 … water chamber

40 … diversion trench 41 … water inlet cavity 42 … water outlet cavity

43 … fifth hole for mounting and dismounting

Detailed Description

The new structure of the check valve of the present invention will be further described in detail with reference to fig. 2 of the accompanying drawings.

The utility model relates to a one-way valve with new structure, please refer to fig. 2, which comprises a lower gland 1, a valve body 2, a valve seat 3, a valve core 4, a valve sleeve 5, a guide sleeve 6, a filter 7, an upper gland 8 and a flange gland 9, wherein the lower gland 1 is detachably fixed on the lower end part of the valve body 2, the flange gland 9 is detachably fixed on the upper end part of the valve body 2, the upper gland 8 is detachably fixed on the lower side of the flange gland 9, the upper gland 8 is detachably fixed on the upper end part of the valve body 2 through the flange gland 9, the lower end part of the filter 7 is detachably fixed on the lower end part of the valve body 2 through the lower gland 1, the upper end part of the filter 7 is positioned in a water inlet cavity 41 of the valve body 2, the valve seat 3 is fixed in the valve body 2 in a sealing manner, the valve seat 3 is positioned between, the guide sleeve 6 is fixed inside the upper end of the valve body 2, the lower end of the guide sleeve 6 is positioned inside the water outlet cavity 42, the valve sleeve 5 is sleeved outside the guide sleeve 6, the valve sleeve 5 is positioned inside the water outlet cavity 42, the inside of the valve sleeve 5 is communicated with the water outlet cavity 42, the inside of the valve core 4 is communicated with the inner cavity of the valve sleeve 5, the top side wall of the valve sleeve 5 is detachably fixed with the lower side wall of the upper end of the guide sleeve 6, the bottom side wall of the valve sleeve 5 is detachably fixed with the upper end wall of the valve seat 3, the upper end of the valve core 4 is internally provided with a spring 10, the upper end of the spring 10 is abutted against the lower side wall of the upper end of the guide sleeve 6, the valve core 4 is elastically connected inside the guide sleeve 6 in a vertical sliding manner through the spring 10, a valve port 11 is arranged between the lower end of the valve core 4 and the upper side of the valve seat 3, the upper side of, go up 8 upper ends middle parts of gland and be equipped with discharge valve 12, the lower part is sealed to be fixed in going up gland 8 inside, go up 8 middle and upper portions of gland and fix in flange gland 9 inside, it is equipped with exhaust hole 13 to go up gland 8, discharge valve 12 passes through exhaust hole 13 with the inside intercommunication of uide bushing 6, the inside downside of disk seat 3 passes through filter 7 upper end and inlet chamber 41 intercommunication. Specifically, after entering the water inlet cavity 41, the medium enters the interior of the valve seat 3 through the upper end of the filter 7, the medium filters impurities containing larger particles in the medium through the filter 7 and then enters the interior of the valve seat 3, at the moment, the medium filtering the larger particle impurities plays an upward hydraulic role on the lower end of the valve core 4, when the hydraulic acting force overcomes the downward hydraulic acting force of the medium falling out of the water cavity 42 on the valve core 4, the gravity of the valve core 4 and the downward thrust of the spring 10, the lower end of the valve core 4 is pushed by upward hydraulic pressure, the valve core 4 slides upward in the guide sleeve 6, the valve port 11 is opened, and the medium in the interior of the valve seat 3 flows to the water outlet cavity 42; the communication between the water inlet cavity 41 and the water outlet cavity 42 is realized, when the medium pressure of the water inlet port in the water inlet cavity 41 is reduced, the medium of the water outlet port in the water outlet cavity 42 is reduced, the upward hydraulic pressure at the lower end part of the valve core 4 cannot overcome the downward hydraulic acting force of the medium in the water outlet cavity 42 on the valve core 4, the gravity of the valve core 4 and the downward thrust of the spring 10, the valve core 4 slowly slides downwards in the guide sleeve 6, the internal volume of the guide sleeve 6 is gradually increased, the medium in the water outlet cavity 42 flows into the valve sleeve 5 and the valve core 4, the downward thrust of the valve core 4 is increased until the valve port 11 is closed, when a power source such as a water pump stops working due to faults or actively stops working or a pipeline is broken, the medium pressure in the water inlet cavity 41 is rapidly reduced, and the medium pipeline in the water outlet cavity 42 is retained or the medium in other connecting pipelines, under the large pressure difference, the medium in the water outlet cavity 42 can quickly return to the low pressure from the high pressure, so that the valve core 4 can also be quickly closed downwards under the pushing of the medium force, the high pressure medium is prevented from net flowing back to the power source, the power source is protected, the medium in the water outlet cavity 42 is prevented from further flowing back, the system is protected, when the valve core 4 slides upwards in the guide sleeve 6, the internal volume of the guide sleeve 6 is gradually reduced, the medium in the guide sleeve 6 flows into the water outlet cavity 42 through the inside of the guide sleeve 6, meanwhile, the spring 10 is gradually compressed, the medium in the valve core 4 flows into the water outlet cavity 42, the upward resistance to the valve core 4 is reduced, the gas generated by the medium in the guide sleeve 6 is exhausted from the exhaust hole 13 through the exhaust valve 12, and the medium in the valve seat 3 is filtered by the filter 7 and then contacts with the lower end part of the valve core 4, open valve port 11, overcome and lead to the fact serious corrosion problem for valve port 11 because of the working medium cleanliness is not enough, under same operating mode condition, have higher life than the check valve of traditional structure. Compared with the prior art, the advantages are as follows: the valve core 4 structure of single spring 10 lifting type is adopted to control the one-way flow of high-pressure water, the backflow phenomenon is prevented, the problem of serious corrosion to the valve port 11 due to low cleanliness of working medium is solved through the filter 7, and the service life is prolonged. The exhaust valve 12 can be connected with the exhaust hole 13 through screw threads. The water inlet cavity 41 can be connected with the water inlet end through the first connecting pipe 35, and the first connecting pipe 35 is communicated with the water inlet cavity 41 through the first circular flange 36. The water outlet cavity 42 is connected with the water outlet end through a second connecting pipe 37, and the second connecting pipe 37 is communicated with the water outlet cavity 42 through a second circular flange 38.

The utility model discloses a check valve with new structure, please refer to fig. 2 and show, can also be on the basis of the technical scheme of the preceding description: the utility model discloses a valve seat, including filter 7, valve body 2, filter 7, inlet chamber 41, the upper end of filter 7 is hollow structure's cylinder and the equipartition is encircled around the outside and is equipped with filtration pore 14, the inside downside of disk seat 3 is through filtering pore 14 and inlet chamber 41 intercommunication, the tip is solid structure's cylinder under the filter 7, the solid structure's of the tip of filter 7 cylinder and the sealed crimping of valve body 2. Like this, the filter 7 upper end is mesocellular structure's cylinder, and filter 7 upper end outside equipartition is encircled around and is equipped with filtration pore 14, and the inside downside of disk seat 3 is through filtering pore 14 and intake cavity 41 intercommunication, and the medium is crossed the filtration pore 14 of evenly circling the cloth in filter 7 upper end and is contained the impurity of great granule in the medium and filter, further overcome because of the working medium cleanliness causes serious corrosion problem for valve port 11 inadequately, under same operating mode condition, has higher life than the check valve of traditional structure. Can also be equipped with first dismouting hole 15 in the bottom of filter 14 tip solid construction's cylinder, when filter 14 needs to be dismantled, twist in first dismouting hole 15 through dismantling the frock, conveniently dismantle. Can also be equipped with second dismouting hole 27 on the 3 upper end walls of disk seat, the crimping of disk seat 3 is fixed at valve body 2 middle part, when disk seat 2 need be dismantled, twists in second dismouting hole 27 through dismantling the frock, convenient dismantlement. And a third dismounting hole 33 is formed in the top side wall of the valve sleeve 5, the valve sleeve 5 is fixed inside the valve body 2 in a compression joint mode, the bottom side wall of the valve sleeve 5 is fixed on the upper end wall of the valve seat 3 in a compression joint mode, and when the valve sleeve 5 needs to be dismounted, the dismounting tool is screwed into the second dismounting hole 27, so that the valve sleeve 5 is convenient to dismount. The flange gland 9 can also be provided with a fourth dismounting hole 34, the upper gland 8 is provided with a fifth dismounting hole 43 corresponding to the fourth dismounting hole 34, the upper gland 8 is connected with the flange gland 9 in a compression joint mode, when the flange gland 9 and the upper gland 8 need to be dismounted, the dismounting tool is screwed into the fourth dismounting hole 34 and the fifth dismounting hole 43, and the flange gland 9 and the upper gland 8 are dismounted together.

The utility model discloses a check valve with new structure, please refer to fig. 2 and show, can also be on the basis of the technical scheme of the preceding description: the interior of the valve sleeve 5 is a first inner cavity 16, the first inner cavity 16 is communicated with a water outlet cavity 42, a guide cavity 17 is arranged in the guide sleeve 6, the first inner cavity 16 is communicated with the guide cavity 17, the valve core 4 is internally provided with a guide inner cavity 18, the spring 10 is arranged in the guide inner cavity 18, the upper end of the spring 10 is pressed against the lower side wall of the guide sleeve 6 at the upper end of the guide inner cavity 18, the valve core 4 can slide up and down through the spring 10 and is elastically connected in the guide cavity 17, the guide cavity 17 is communicated with the upper end part of the guide inner cavity 18 and the first inner cavity 16, the first inner cavity 16 is communicated with the lower end part of the guide inner cavity 18, the first inner cavity 16 is communicated with the interior of the valve seat 3 in a releasable way through the valve port 11, the exhaust valve 12 is communicated with the guide inner cavity 18 through the exhaust hole 13. Thus, when the hydraulic acting force in the valve seat 3 overcomes the hydraulic acting force of the medium falling into the water outlet cavity 42 to the valve core 4 downwards, the gravity of the valve core 4 and the downward thrust of the spring 10, the lower end part of the valve core 4 is pushed upwards by hydraulic pressure, the valve core 4 slides upwards in the guide cavity 17, the valve port 11 is opened, the medium in the valve seat 3 flows to the water outlet cavity 42 to realize the communication between the water inlet cavity 41 and the water outlet cavity 42, when the valve core 4 slowly slides downwards in the guide cavity 17, the internal volume at the upper end of the guide cavity 17 is gradually increased, the medium in the water outlet cavity 42 flows into the first inner cavity 16 and the upper end of the guide inner cavity 18, the downward thrust to the valve core 4 is increased until the valve port 11 is closed, and when the valve core 4 slides upwards in the guide cavity 17, the internal volume at the upper end of the guide cavity 17 is gradually reduced, the medium in the guide cavity 17 flows into the water outlet cavity 42 from the, meanwhile, the spring 10 is gradually compressed upwards, medium flows in from the lower end part of the guide inner cavity 18, the pressure between the water outlet cavity 42 and the guide inner cavity 18 is balanced, when the valve core 4 is prevented from moving, the pressure inside the upper end of the valve core 4 is suppressed, the upward hydraulic pressure on the valve core 4 is increased, the valve port 11 is quickly opened, medium impurities in the guide inner cavity 18 can be discharged through the lower end part of the guide inner cavity 18, and gas generated by the medium in the guide cavity 17 is discharged through the exhaust valve 12 through the exhaust hole 13. The guide inner cavity 18 can be a cylindrical barrel cavity, the upper end of the valve core 4 can be connected to the guide cavity 17 which is the cylindrical barrel cavity in a sliding mode up and down, the upper end of the spring 10 is abutted to the lower side wall of the inner portion of the upper end of the guide sleeve 6, and the spring 10 is limited in the upper portion of the guide sleeve 6 which is the cylindrical barrel cavity. A water through cavity 39 may be further provided on the valve housing 5, and the water outlet cavity 42 is communicated with the first inner cavity 16 through the water through cavity 39.

The further preferable technical scheme on the basis of the technical scheme described above is as follows: the upper end surface of the guide sleeve 6 is provided with a thread through hole 19 for communicating the first inner cavity 16 with the exhaust hole 13. Therefore, the first inner cavity 16 is communicated with the guide cavity 17, the guide cavity 17 is communicated with the guide inner cavity 18, the first inner cavity 16 is communicated with the exhaust hole 13 through the threaded through hole 19, on one hand, the guide sleeve 6 is convenient to disassemble and assemble, on the other hand, the guide cavity 17 is communicated with the exhaust hole 13 on the gland, and gas generated in the medium is effectively exhausted through the exhaust valve 12. The further preferable technical scheme on the basis of the technical scheme described above is as follows: the lower end part of the valve core 4 is a valve flap 20, the middle upper part of the valve core 4 is a guide post 21, the guide inner cavity 18 is positioned inside the guide post 21, the upper side of the valve seat 3 is in an inverted cone shape, the lower side of the valve flap 20 is a cone-shaped sealing surface 22, the sealing surface 22 and the upper side of the valve seat 3 are provided with the valve port 11 in an inverted cone shape, the valve flap 20 can be elastically connected inside the middle lower end of the guide cavity 17 in a sliding manner up and down through the guide post 21, and the upper side wall of the valve flap 20 can be detachably abutted against the lower side wall of the guide. Thus, when the hydraulic acting force in the valve seat 3 overcomes the hydraulic acting force of the medium falling into the water outlet cavity 42 to the valve core 4 downwards, the gravity of the valve core 4 and the downward thrust of the spring 10, the sealing surface 22 at the lower side of the valve clack 20 is pushed upwards by hydraulic pressure, the guide post 21 drives the valve clack 20 to slide upwards in the guide cavity 17, the valve port 11 is opened, the medium in the valve seat 3 flows to the water outlet cavity 42 to realize the communication between the water inlet cavity 41 and the water outlet cavity 42 until the upper side wall of the valve clack 20 can be in releasable abutment with the lower side wall of the guide sleeve 6, the valve port 11 is completely opened, when the guide post 21 slowly slides downwards in the guide cavity 17, the volume of the upper end in the guide cavity 17 is gradually increased, the medium in the water outlet cavity 42 flows into the first inner cavity 16 and the upper end of the guide inner cavity 18, the downward thrust of the valve clack 20 is increased, and the guide, the spring 10 gradually expands downwards, the medium at the lower end of the guide inner cavity 18 enters the first inner cavity 16 and then flows into the water outlet cavity 42 to reduce the downward resistance to the valve clack 20, so that the downward stroke of the valve clack 20 is accelerated until the valve port 11 is closed, and when the guide post 21 slides upwards in the guide cavity 17, the volume of the upper end in the guide cavity 17 is gradually reduced, the medium in the guide cavity 17 flows into the water outlet cavity 42 from the upper end of the guide cavity 17, meanwhile, the lower end of the spring 10 is gradually compressed upwards, the medium in the water outlet cavity 42 flows into the lower end of the guide inner cavity 18 to balance the pressure between the water outlet cavity 42 and the guide inner cavity 18, when the valve clack 20 is prevented from moving, the guide inner cavity 18 of the guide post 21 is suppressed, the upward hydraulic pressure to the valve core 4 is increased, the pressure between the water outlet cavity 42 and the guide inner cavity 18 is balanced, when the valve core 4, the upward hydraulic pressure of the valve core 4 is increased, the upward hydraulic pressure of the valve clack 20 is increased, and simultaneously gas generated by the medium in the guide cavity 17 is exhausted from the exhaust hole 13 through the exhaust valve 12. The guide post 21 can be further provided with a spring 10 mounting hole, the spring 10 mounting hole is positioned in the guide inner cavity 18, and the spring 10 is arranged in the guide inner cavity 18 of the guide post 21 through the spring 10 mounting hole. The inner side wall of the guide sleeve 6 can be provided with a guide groove 40, and medium impurities in the water outlet cavity 42 flow upwards into the upper end part of the guide cavity 17 or downwards into the lower end part of the guide cavity 17 through the guide groove 40. The further preferable technical scheme on the basis of the technical scheme described above is as follows: the upper end of the valve clack 20 is provided with a first water through hole 23, and the first inner cavity 16 is communicated with the lower end part of the guide inner cavity 18 through the first water through hole 23. Thus, the first water through hole 23 is arranged at the upper end of the valve clack 20 of the valve core 4, the first water through hole 23 connects the water outlet cavity 42 with the lower end part of the guide cavity 18 provided with the spring 10, when the guide column 21 slowly slides downwards in the guide cavity 17, the volume of the upper end part of the guide cavity 17 is gradually increased, the medium in the first inner cavity 16 flows into the upper end part of the guide cavity 18 through the first water through hole 23, the downward hydraulic acting force of the valve clack 20 is increased until the valve port 11 is closed, and when the guide column 21 slides upwards in the guide cavity 17, the volume of the upper end part of the guide cavity 17 is gradually reduced, the medium in the guide cavity 17 flows into the water outlet cavity 42 from the upper end part of the guide cavity 17 through the first water through hole 23, the upward resistance of the valve clack 20 is reduced, and simultaneously the medium impurities in the guide cavity 18 can be discharged through the. On the basis of the technical scheme described above, the method can also comprise the following steps: the upper side of the guide sleeve 6 is provided with a second water through hole 24, and the guide cavity 17 is communicated with the upper end part of the guide inner cavity 18 and the first inner cavity 16 through the second water through hole 24. Thus, the guide cavity 17 is communicated with the upper end of the guide cavity 18 and the first cavity 16 through the second water through hole 24, when the guide column 21 slowly slides downwards in the guide cavity 17, the spring 10 gradually stretches downwards, the volume of the upper end in the guide cavity 17 gradually increases, the medium in the water outlet cavity 42 flows into the lower end of the guide cavity 18 through the second water through hole 24, the downward resistance to the valve flap 20 is reduced, the downward stroke of the valve flap 20 is accelerated until the valve port 11 is closed, and when the guide column 21 slides upwards in the guide cavity 17, the lower end of the spring 10 is gradually compressed upwards, the medium in the guide cavity 18 flows out of the water cavity 42 through the second water through hole 24, the upward hydraulic pressure of the valve flap 20 is increased, and simultaneously, the gas generated by the medium in the guide cavity 17 is discharged from the exhaust hole 13 through the exhaust valve 12.

The utility model discloses a check valve with new structure, please refer to fig. 2 and show, can also be on the basis of the technical scheme of the preceding description: the valve seat 3 is internally provided with a second inner cavity 25, the upper side of the second inner cavity 25 is in releasable communication with the water outlet cavity 42 through the valve port 11, and the lower side of the second inner cavity 25 is communicated with the water inlet cavity 41 through the upper end part of the filter 7. Thus, the medium enters the inlet chamber 41 and then enters the second inner chamber 25 through the upper end of the filter 7, and the second inner chamber 25 is in releasable communication with the outlet chamber 42 through the valve port 11.

The utility model discloses a check valve with new structure, please refer to fig. 2 and show, can also be on the basis of the technical scheme of the preceding description: lower gland 1 is equipped with first mounting hole, and first set screw 26 passes first mounting hole gets into in the tip under 2 of valve body, lower gland 1 passes through first set screw 26 with first mounting hole is detachable fixes on the tip under 2 of valve body, be equipped with the second mounting hole on the flange gland 9, second set screw 28 passes the second mounting hole and gets into in the upper end of valve body 2, flange gland 9 passes through second set screw 28 and the detachable fixing of second mounting hole on 2 upper end of valve body. Like this, first set screw 26 passes first mounting hole gets into valve body 2 lower tip, and gland 1 is detachable to be fixed on valve body 2 lower tip through first set screw 26 and first mounting hole down, guarantees gland 1 and the reliability of being connected of valve body 2 lower tip down, convenient dismantlement simultaneously, and second set screw 28 passes the second mounting hole and gets into valve body 2 upper end, and flange gland 9 passes through second set screw 28 and the detachable fixing of second mounting hole on valve body 2 upper end, guarantees the reliability of being connected of flange gland 9 and valve body 2 upper end, convenient dismantlement simultaneously.

The utility model discloses a check valve with new structure, please refer to fig. 2 and show, can also be on the basis of the technical scheme of the preceding description: the tip is equipped with the first seal groove that holds first sealing washer 29 under the filter 7, the tip under the filter 7 with 1 inside is fixed at 2 tip under the valve body through the detachable sealing of first sealing washer 29 down, disk seat 3 is equipped with the second seal groove that holds second sealing washer 30, disk seat 3 is fixed through the sealing of second sealing washer 30 inside in the valve body 2, it is equipped with the third seal groove that holds third sealing washer 31 to go up gland 8, it fixes through the detachable sealing of third sealing washer 31 on the 2 upper end of valve body to go up gland 8, it is equipped with fourth sealing washer 32 to go up gland 8 upper end middle part, discharge valve 12 middle and lower part is fixed through fourth sealing washer 32 sealing inside in going up gland 8. Like this, the tip is fixed with the inside through first sealing washer 29 is detachable sealed down in the gland 1 under 7 under the filter, effectively guarantee the leakproofness between tip and the gland 1 under 7 under the filter, inside in disk seat 3 passes through the sealed fixing of second sealing washer 30 in the valve body 2, guarantee the leakproofness between the inside in disk seat 3 and the valve body 2, go up gland 8 through the detachable sealed fixing of third sealing washer 31 on the valve body 2 upper end, guarantee the leakproofness between upper gland 8 and the valve body 2 upper end, inside in discharge valve 12 lower part passes through fourth sealing washer 32 sealed fixing in upper gland 8, guarantee the leakproofness between discharge valve 12 lower part and the inside in upper gland 8.

The above description is only for the description of several embodiments of the present invention, but the scope of the present invention should not be considered as falling within the scope of the present invention, in which all the equivalent changes or modifications or the equal-scale enlargement or reduction etc. according to the design spirit of the present invention are made.

Claims

1. A check valve with a new structure is characterized in that: comprises a lower gland (1), a valve body (2), a valve seat (3), a valve core (4), a valve sleeve (5), a guide sleeve (6), a filter (7), an upper gland (8) and a flange gland (9), wherein the lower gland (1) is detachably fixed on the lower end part of the valve body (2), the flange gland (9) is detachably fixed on the upper end part of the valve body (2), the upper gland (8) is detachably fixed on the lower side of the flange gland (9), the upper gland (8) is detachably fixed on the upper end part of the valve body (2) in a sealing way through the flange gland (9), the lower end part of the filter (7) is detachably fixed on the lower end part of the valve body (2) in a sealing way through the inner part of the lower gland (1), the upper end part of the filter (7) is positioned in a water inlet cavity (41) of the valve body (2), the valve seat (3) is, the valve seat (3) is positioned between a water outlet cavity (42) of the valve body (2) and the water inlet cavity (41), the guide sleeve (6) is fixed inside the upper end of the valve body (2), the middle lower end of the guide sleeve (6) is positioned inside the water outlet cavity (42), the valve sleeve (5) is sleeved outside the guide sleeve (6), the valve sleeve (5) is positioned inside the water outlet cavity (42), the inside of the valve sleeve (5) is communicated with the water outlet cavity (42), the inside of the valve core (4) is communicated with the inner cavity of the valve sleeve (5), the top side wall of the valve sleeve (5) is detachably fixed with the lower side wall of the upper end of the guide sleeve (6), the bottom side wall of the valve sleeve (5) is detachably fixed with the upper end wall of the valve seat (3), the spring (10) is arranged inside the upper end of the valve core (4), the upper end of the spring (10) is abutted against the inner lower side wall of the upper end of the guide sleeve (6), the valve core (4) can slide up and down through the spring (10) and is elastically connected inside the guide sleeve (6), a valve port (11) is arranged between the lower end part of the valve core (4) and the upper side of the valve seat (3), the upper side in the valve seat (3) is in releasable communication with the water outlet cavity (42) through the valve port (11), an exhaust valve (12) is arranged in the middle of the upper end of the upper gland (8), the middle lower part of the exhaust valve (12) is hermetically fixed in the upper gland (8), the middle upper part of the upper gland (8) is fixed in the flange gland (9), the upper gland (8) is provided with an exhaust hole (13), the exhaust valve (12) is communicated with the interior of the guide sleeve (6) through the exhaust hole (13), the lower side in the valve seat (3) is communicated with the water inlet cavity (41) through the upper end part of the filter (7).

2. The one-way valve of claim 1, wherein: filter (7) upper end is equipped with around cylinder and the outside equipartition ring of hollow structure and crosses filtration hole (14), the inside downside of disk seat (3) is through crossing filtration hole (14) and intake cavity (41) intercommunication, the tip is solid construction's cylinder under filter (7), the solid construction's of the tip of filter (7) cylinder and valve body (2) sealed crimping.

3. The one-way valve of claim 1, wherein: the valve sleeve (5) is internally provided with a first inner cavity (16), the first inner cavity (16) is communicated with a water outlet cavity (42), the guide sleeve (6) is internally provided with a guide cavity (17), the first inner cavity (16) is communicated with the guide cavity (17), the valve core (4) is internally provided with a guide inner cavity (18), the spring (10) is arranged in the guide inner cavity (18), the upper end part of the spring (10) is abutted against the lower side wall of the guide sleeve (6) at the upper end of the guide inner cavity (18), the valve core (4) is elastically connected in the guide cavity (17) in a vertically sliding manner through the spring (10), the guide cavity (17) is communicated with the upper end part of the guide inner cavity (18) and the first inner cavity (16), the first inner cavity (16) is communicated with the lower end part of the guide inner cavity (18), and the first inner cavity (16) is in releasable communication with the valve seat (3) through the valve port (11), the exhaust valve (12) is communicated with the guide inner cavity (18) through the exhaust hole (13).

4. A new construction of a one-way valve according to claim 3, wherein: the upper end surface of the guide sleeve (6) is provided with a threaded through hole (19) for communicating the guide cavity (17) with the exhaust hole (13).

5. A new construction of a one-way valve according to claim 3, wherein: the lower end of the valve core (4) is provided with a valve flap (20), the middle upper part of the valve core (4) is provided with a guide column (21), the guide inner cavity (18) is positioned inside the guide column (21), the upper side of the valve seat (3) is in an inverted cone shape, the lower side of the valve flap (20) is provided with a conical sealing surface (22), the sealing surface (22) and the upper side of the valve seat (3) are provided with the valve port (11) in the inverted cone shape, the valve flap (20) can be elastically connected to the middle lower end of the guide cavity (17) in a sliding manner up and down through the guide column (21), and the upper side wall of the valve flap (20) can be in releasable abutting contact with the lower side wall of the.

6. The one-way valve of claim 5, wherein: the upper end of the valve clack (20) is provided with a first water through hole (23), and the first inner cavity (16) is communicated with the lower end of the guide inner cavity (18) through the first water through hole (23).

7. The one-way valve of claim 5, wherein: the upper side of the guide sleeve (6) is provided with a second water through hole (24), and the guide cavity (17) is communicated with the upper end part of the guide inner cavity (18) and the first inner cavity (16) through the second water through hole (24).

8. A new construction of a check valve according to any of claims 1 to 7, wherein: the valve seat (3) is internally provided with a second inner cavity (25), the upper side of the second inner cavity (25) is in releasable communication with the water outlet cavity (42) through the valve port (11), and the lower side of the second inner cavity (25) is communicated with the water inlet cavity (41) through the upper end part of the filter (7).

9. A new construction of a check valve according to any of claims 1 to 7, wherein: lower gland (1) is equipped with first mounting hole, and first set screw (26) pass first mounting hole gets into in the tip under valve body (2), gland (1) passes through down first set screw (26) with first mounting hole is detachable fixes on the tip under valve body (2), be equipped with the second mounting hole on flange gland (9), second set screw (28) pass the second mounting hole and get into in the valve body (2) upper end, flange gland (9) are through detachable the fixing on valve body (2) upper end of second set screw (28) and second mounting hole.

10. A new construction of a check valve according to any of claims 1 to 7, wherein: the lower end part of the filter (7) is provided with a first sealing groove for accommodating a first sealing ring (29), the lower end part of the filter (7) and the interior of the lower gland (1) are detachably fixed at the lower end part of the valve body (2) in a sealing way through a first sealing ring (29), the valve seat (3) is provided with a second sealing groove for accommodating a second sealing ring (30), the valve seat (3) is fixed in the valve body (2) in a sealing way through the second sealing ring (30), the upper gland (8) is provided with a third sealing groove for accommodating a third sealing ring (31), the upper gland (8) is detachably fixed on the upper end part of the valve body (2) in a sealing way through a third sealing ring (31), go up gland (8) upper end middle part and be equipped with fourth sealing washer (32), lower part passes through fourth sealing washer (32) sealed the fixing in discharge valve (12) inside in going up gland (8).