CN211501756U

CN211501756U - Slide valve type high-pressure check valve

Info

Publication number: CN211501756U
Application number: CN202020024702.4U
Authority: CN
Inventors: 朱协清; 陶剑英; 梁雪梅
Original assignee: Wuhan Xiete Valve Technology Co ltd
Current assignee: Wuhan Xiete Valve Technology Co ltd
Priority date: 2020-01-07
Filing date: 2020-01-07
Publication date: 2020-09-15
Anticipated expiration: 2030-01-07

Abstract

The utility model discloses a slide valve type high-pressure check valve, which comprises a valve main body, wherein a left gland and a right gland are respectively arranged at two ends of the valve main body, an inlet connecting pipe and an outlet connecting pipe are respectively arranged outside the left gland and the right gland, a pressing plate is respectively sleeved outside the inlet connecting pipe and the outlet connecting pipe, and a pair of pressing plates are connected and fixed through a plurality of studs; a filter assembly is detachably connected between the inlet connecting pipe and the left gland; a valve seat is sleeved on the left side in the valve main body, a left spring is arranged on the valve seat, and the other end of the left spring is fixedly connected with the left gland; a valve core is sleeved on the right side in the valve main body, a right spring is arranged on the valve core, and the other end of the right spring is connected with the right gland; the valve core is matched with the valve seat; the slide valve type high-pressure check valve has the advantages of regular and compact appearance, less abrasion of internal parts, good liquid flow cutting effect and no leakage.

Description

Slide valve type high-pressure check valve

Technical Field

The utility model relates to check valve technical field, concretely relates to slide valve formula high pressure check valve.

Background

The slide valve is a flow divider which utilizes a valve core (plunger piston and valve clack) to slide on a sealing surface and changes the position of a fluid inlet channel and a fluid outlet channel so as to control the flow direction of fluid; the check valve is a valve with a round valve clack and acts by self weight and medium pressure to block the medium from flowing backwards; the two have advantages and disadvantages, and in order to fully utilize the advantages of the two, enterprises put forward a slide valve type check valve, integrate the advantages of the two and obtain better application.

For example, in 2018, a Chinese utility model patent (publication number: CN206904301U) discloses a slide valve type high-pressure check valve, which comprises a valve body, a plunger, a valve core, an end cover and a spring assembly, wherein the valve body is arranged in a cylindrical structure, the plunger and the spring assembly are both arranged on the valve body, the valve core is arranged on the plunger, and the end face of the valve body is provided with the end cover; the check valve has good sealing performance and cutting performance; however, in long-term operation, the accumulation of impurities in the fluid is easy to block the fluid channel and aggravate the abrasion of the matching surface, thereby reducing the service life and increasing the maintenance times. The valve parts are also in need of attention in the process of maintenance and easy disassembly and assembly.

Disclosure of Invention

The utility model aims at providing a slide valve formula high pressure check valve to the problem that prior art exists.

In order to achieve the above object, the utility model adopts the following technical scheme:

a slide valve type high-pressure check valve comprises a valve main body, wherein a left gland and a right gland are respectively arranged at two ends of the valve main body, an inlet connecting pipe and an outlet connecting pipe are respectively arranged outside the left gland and the right gland, pressing plates are respectively sleeved outside the inlet connecting pipe and the outlet connecting pipe, and a pair of the pressing plates are fixedly connected through a plurality of studs; a filter assembly is detachably connected between the inlet connecting pipe and the left gland; a valve seat is sleeved on the left side in the valve main body, a left spring is arranged on the valve seat, and the other end of the left spring is fixedly connected with the left gland; a valve core is sleeved on the right side in the valve main body, a right spring is arranged on the valve core, and the other end of the right spring is connected with the right gland; the valve core is matched with the valve seat.

The slide valve type high-pressure check valve can achieve the purpose of cutting off and connecting high-pressure liquid flow through the matching of the left spring, the valve seat, the right spring and the valve core, reduces the impact abrasion between the valve core and the valve seat, and has good liquid flow cutting-off effect and no leakage;

the setting of filtering component can effectively filter the impurity in the liquid, avoids impurity entering valve main part inside jam passageway, perhaps reduces the wearing and tearing of each fitting surface, can obviously improve this slide valve formula high pressure check valve's life, helps improving sealing performance, reduces the liquid leakage. And the filter component is detachably arranged at the left gland and the inlet connecting pipe, so that the filter component is easy to assemble and disassemble and convenient to replace and maintain.

Both sides clamp plate and transversely run through the setting of stud not only makes this slide valve formula high pressure check valve outward appearance overall structure compact, pleasing to the eye, can effectually push down the part in entry takeover, filter assembly, gland and the valve main part moreover, has ensured firm and stability that each part is connected fixedly, can not increase yet and dismantle and assemble the degree of difficulty, easily maintenance.

Further, the filtering component comprises a filter screen seat and a filter screen which are fixedly connected; the filter screen seat is installed at the end face of the left gland and an elastic gasket is arranged between the filter screen seat and the left gland.

The filter screen seat can effectively fix and support the filter assembly, and is convenient for being fixedly matched with the left gland; the elastic gasket is arranged to prevent the filter assembly from loosening, and particularly when high-pressure fluid passes through, the stability of the filter screen can be guaranteed, certain resilience force is provided, and the stress of the filter screen seat is improved.

Furthermore, the filter screen seat is provided with a cylinder and a flange edge which are integrally formed, the flange edge is clamped between the left gland and the inlet connecting pipe, and the cylinder is matched with the inner circumferential wall of the left gland; the filter screen is welded or glued at one end of the column body far away from the flange edge.

The setting of cylinder can increase the filter screen seat with the area of contact of left side gland improves and supports the lifting surface area, promotes the fixed fastness of filter screen seat, is better than simple flange limit connection effect.

Furthermore, a port of the left gland, which is close to one side of the inlet connecting pipe, is provided with a stepped counter bore structure, and the filter assembly is installed on the stepped counter bore structure.

Furthermore, a plurality of sealing rings are arranged between the inlet connecting pipe and the left gland and close to the filtering component, and a sealing ring is also arranged between the right gland and the outlet connecting pipe.

Furthermore, the left gland and the right gland are respectively fixed with the valve main body in a threaded manner, and sealing rings are respectively arranged on the matching surfaces.

The sealing effect at two ends of the valve main body can be ensured by the arrangement of the sealing rings, and the liquid leakage of contact surfaces at two ends is avoided.

Further, the outer diameters of the inlet connecting pipe, the outlet connecting pipe, the left gland, the right gland and the valve main body are the same; the outer circumferential surface of the stud is tangent to the outer circumferential surface of the valve body. The appearance of the slide valve type high-pressure check valve is regular and compact in connection.

Furthermore, the four studs are arranged around the valve main body in a centrosymmetric manner; and two ends of the stud are fixed with the pressing plate through nuts.

Furthermore, a plurality of main seals are arranged between the inner wall of the valve main body and the outer walls of the valve seat and the valve core; and a fluid channel is arranged among the plurality of main seals.

Waist-shaped holes are formed in the valve seat and the valve core; when the high-pressure liquid pushes the end faces of the valve seat and the valve core to be matched with each other to play a sealing role, the high-pressure water is cut off, the high-pressure water is in hard seal matching, meanwhile, the kidney-shaped holes in the valve seat and the valve core are just positioned between the two main seals, and even if the water cutting of the two end faces fails, the high-pressure liquid can be completely cut off after reaching the space between the two seals; when the kidney-shaped holes on the valve seat and the valve core are right positioned at the fluid channel, the liquid flow is communicated, and the slide valve type high-pressure check valve is in a normal liquid output state.

Compared with the prior art, the beneficial effects of the utility model are that: 1. the slide valve type high-pressure check valve can quickly respond to achieve the purpose of cutting off and connecting high-pressure liquid flow, the impact abrasion between the valve core and the valve seat is less, the liquid flow cutting-off effect is good, and no leakage exists; 2. the arrangement of the filter assembly can effectively filter impurities in liquid, prevent the impurities from entering the valve main body to block a channel or reduce the abrasion of each matching surface, can obviously prolong the service life of the slide valve type high-pressure check valve, is beneficial to improving the sealing performance and reducing the liquid leakage; 3. the filter assembly is detachably arranged at the left gland and the inlet connecting pipe, so that the assembly and the disassembly are easy, and the replacement and the maintenance are convenient; 4. the filter screen seat arranged in the structure can increase the contact area between the filter screen seat and the left gland, improve the bearing area of the support and improve the firmness of fixing the filter screen seat; the stress is further improved by the matched use of the elastic gasket; 5. the slide valve type high-pressure check valve has the advantages of compact and attractive overall appearance structure, good connection stability of all the parts, low difficulty in disassembly and assembly and easy maintenance.

Drawings

Fig. 1 is a schematic view of the overall structure of a slide valve type high-pressure check valve according to the present invention;

fig. 2 is an enlarged schematic structural diagram of a position a of the slide valve type high-pressure check valve of the present invention;

in the figure: 1. a valve body; 2. a left gland; 3. a right gland; 4. an inlet connection pipe; 5. an outlet connection pipe; 6. pressing a plate; 7. a stud; 8. a nut; 9. a filter assembly; 901. a flange edge; 902. a cylinder; 903. filtering with a screen; 10. a valve seat; 11. a left spring; 12. a valve core; 13. a right spring; 14. primary sealing; 15. a seal ring; 16. a screw; 17. a fluid channel; 18. an elastic pad.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The first embodiment is as follows:

as shown in fig. 1, the slide valve type high-pressure check valve comprises a valve body 1, wherein a left gland 2 and a right gland 3 are respectively arranged at two ends of the valve body 1, an inlet connecting pipe 4 and an outlet connecting pipe 5 are respectively arranged outside the left gland 2 and the right gland 3, a pressing plate 6 is respectively sleeved outside the inlet connecting pipe 4 and the outlet connecting pipe 5, and a pair of the pressing plates 6 are fixedly connected through four studs 7 and eight nuts 8; a filtering component 9 is detachably connected between the inlet connecting pipe 4 and the left gland 2; a valve seat 10 is sleeved on the left side in the valve main body 1, a left spring 11 is arranged in the valve seat 10, and the other end of the left spring 11 is fixedly connected with the inner wall of the left gland 2; a valve core 12 is sleeved on the right side in the valve main body 1, a right spring 13 is arranged on the valve core 12, and the other end of the right spring 13 is connected with the right gland 3; the valve core 12 is matched with the valve seat 10.

The slide valve type high-pressure check valve can achieve the purpose of cutting off and connecting high-pressure liquid flow through the matching of the left spring 11, the valve seat 10, the right spring 13 and the valve core 12, reduces the impact abrasion between the valve core and the valve seat, and has good liquid flow cutting-off effect and no leakage;

the setting of filter assembly 9 can effectively filter the impurity in the liquid, avoids impurity entering valve main part 1 inside blocking passageway, perhaps reduces the wearing and tearing of each fitting surface, can obviously improve this slide valve formula high pressure check valve's life, helps improving sealing performance, reduces the liquid leakage. And the filter assembly 9 is detachably arranged at the left gland 2 and the inlet connecting pipe 4, so that the assembly and the disassembly are easy, and the replacement and the maintenance are convenient.

Both sides clamp plate 6 and transversely (along 1 length direction of valve main part) run through the setting of double-screw bolt 7 not only makes this slide valve formula high pressure check valve outward appearance overall structure compact, pleasing to the eye, can effectually push down the part in entry takeover 4, filter assembly 9, gland and the valve main part moreover, has ensured each part and has connected fixed firmly and stability, also can not increase the dismantlement and assemble the degree of difficulty, easily maintenance.

Further, the port of the left gland 2 close to one side of the inlet connecting pipe 4 is provided with a stepped counter bore structure, and the filter assembly 9 is mounted on the stepped counter bore structure.

Further, a sealing ring 15 is arranged between the inlet connecting pipe 4 and the left gland 2 and close to the filtering component 9, and a sealing ring is also arranged between the right gland 3 and the outlet connecting pipe 5.

Further, the left gland 2 and the right gland 3 are respectively fixed with the valve body 1 through bolts 16, and sealing rings 15 are respectively arranged on the matching surfaces.

The sealing rings 15 are arranged to ensure the sealing effect at both ends of the valve body 1 and prevent the liquid leakage at the contact surfaces at both ends.

Further, the outer diameters of the inlet connecting pipe 4, the outlet connecting pipe 5, the left gland 2, the right gland 3 and the valve main body 1 are the same; the outer circumferential surface of the stud 7 is closely arranged close to the outer circumferential surface of the valve body 1. The appearance of the slide valve type high-pressure check valve is regular and compact in connection.

Furthermore, four studs 7 are arranged around the valve main body 1 in a centrosymmetric manner.

Further, four main seals 14 are arranged between the inner wall of the valve body 1 and the outer walls of the valve seat 10 and the valve core 12 at equal intervals; wherein a fluid passage 17 is provided between two pairs of primary seals 14.

Example two:

the present embodiment provides a structure and a mounting manner of the filter assembly in the first embodiment.

Specifically, as shown in fig. 2, the filtering assembly 9 includes a filter screen seat and a filter screen 903 which are fixedly connected; the filter screen seat is installed at the end face of the left gland 2, and an elastic gasket 18 is arranged between the filter screen seat and the left gland 2.

The filter screen seat can effectively fix and support the filter assembly 9, and is convenient to be fixedly matched with the stepped hole structure of the left gland 2; the elastic gasket 18 is arranged to prevent the filter assembly 9 from loosening, and particularly, when high-pressure fluid passes through, the stability of the filter screen 903 can be ensured, a certain resilience force is provided, and the stress of the filter screen seat is improved.

Further, the filter screen seat is provided with a cylinder 902 and a flange 901 which are integrally formed, the flange 901 is clamped between the left gland 2 and the inlet connecting pipe 4, and the cylinder 902 is arranged in a matching manner with the inner circumferential wall of the left gland 2; the filter screen 903 is welded to the end of the column 902 remote from the flange 901.

The setting of cylinder 902 can increase the filter screen seat with the area of contact of left side gland 2 improves and supports the lifting surface area, promotes the fixed fastness of filter screen seat, is better than simple flange limit connection effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A slide valve type high-pressure check valve comprises a valve main body, wherein a left gland and a right gland are respectively arranged at two ends of the valve main body, and the slide valve type high-pressure check valve is characterized in that an inlet connecting pipe and an outlet connecting pipe are respectively arranged outside the left gland and the right gland, pressing plates are respectively sleeved outside the inlet connecting pipe and the outlet connecting pipe, and a pair of pressing plates are fixedly connected through a plurality of studs; a filter assembly is detachably connected between the inlet connecting pipe and the left gland; a valve seat is sleeved on the left side in the valve main body, a left spring is arranged on the valve seat, and the other end of the left spring is fixedly connected with the left gland; a valve core is sleeved on the right side in the valve main body, a right spring is arranged on the valve core, and the other end of the right spring is connected with the right gland; the valve core is matched with the valve seat.

2. A spool-type high pressure check valve according to claim 1 wherein said filter assembly comprises a fixedly attached screen seat and a screen; the filter screen seat is installed at the end face of the left gland and an elastic gasket is arranged between the filter screen seat and the left gland.

3. The spool-type high-pressure check valve according to claim 2, wherein the strainer holder has a cylindrical body and a flange formed integrally therewith, the flange being engaged between the left gland and the inlet nipple, the cylindrical body being fitted to an inner circumferential wall of the left gland; the filter screen is welded or glued at one end of the column body far away from the flange edge.

4. A spool-type high-pressure check valve according to claim 1, wherein a port of the left gland on a side thereof adjacent to the inlet nipple has a stepped counterbore structure on which the filter assembly is mounted.

5. A spool-type high-pressure check valve according to claim 1, wherein a plurality of sealing rings are provided between the inlet nipple and the left gland adjacent to the filter assembly, and a sealing ring is also provided between the right gland and the outlet nipple.

6. The slide valve type high pressure check valve according to claim 1, wherein the left and right glands are screw-coupled to the valve body, respectively, and have sealing rings on mating surfaces, respectively.

7. A spool-type high-pressure check valve according to claim 1, wherein the outer diameters of the inlet nipple, the outlet nipple, the left gland, the right gland, and the valve body are all the same; the outer circumferential surface of the stud is tangent to the outer circumferential surface of the valve body.

8. The spool-type high-pressure check valve according to claim 1, wherein said studs are four and are arranged concentrically around said valve body; and two ends of the stud are fixed with the pressing plate through nuts.

9. A spool-type high-pressure check valve according to claim 1, wherein a plurality of primary seals are provided between the inner wall of the valve body and the outer walls of the valve seat and the spool; and a fluid channel is arranged among the plurality of main seals.