CN216278733U

CN216278733U - Back pressure valve structure convenient to adjust

Info

Publication number: CN216278733U
Application number: CN202122693993.3U
Authority: CN
Inventors: 张选军
Original assignee: Shanghai Longmeng Machinery Co ltd
Current assignee: Shanghai Longmeng Machinery Co ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-04-12
Anticipated expiration: 2031-11-05

Abstract

The application discloses back pressure valve structure convenient to adjust, relate to the field of valve, it includes valve body and elastic component, the last valve pocket of column has been seted up in going up the valve body, the elastic component is installed in last valve pocket, still including setting up the regulation seat and the adjusting screw who rotates the setting on last valve body in last valve pocket, the axial of adjusting the seat edge last valve pocket is made elevating movement, adjusting screw follows the axial setting of last valve pocket, adjusting screw wear to establish the regulation seat and with regulation seat screw-thread fit, adjust seat butt elastic component, the last portion of twisting that is provided with of adjusting screw, twist and move the portion and set up in the last valve body outside. This application is adjusted the opening and closing pressure of back pressure valve through setting up adjusting screw, and adjusting screw's diameter is less, and adjusting screw's twisting portion can set up to the shape that can be operated through conventional instrument, has the effect of convenient regulation.

Description

Back pressure valve structure convenient to adjust

Technical Field

The utility model relates to the field of valve, especially, relate to a back pressure valve structure convenient to adjust.

Background

The term Back Pressure Valve is derived from Back Pressure Valve. It is meant that a certain pressure is built up due to the function of the valve, which pressure can generally be regulated. Can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metal, radioactive media and the like.

In the related art, the adjusting part of the back pressure valve comprises an upper valve body 1, a spring 6 and a threaded column 120, wherein the upper valve body 1 is arranged in a hollow cylindrical shape, the spring 6 is installed in the upper valve body 1, one end of the spring 6 is abutted against the threaded column 120, and the other end of the spring 6 is abutted against the diaphragm 110 to seal the liquid inlet pipeline 91; the top of the threaded column 120 is integrally provided with a rotating block 121, and the threaded column 120 is pressed or loosened by rotating the rotating block 121 to adjust the pressure of the spring 6.

In view of the above-mentioned related technologies, the inventor finds that, in use, since the threaded column 120 is directly matched with the upper valve body 1, the threaded column 120 has a large volume, and if the rotary block 121 is designed to be small in size, the connection strength between the rotary block 121 and the threaded column 120 is reduced, so that the rotary block 121 has a large size, and can be adjusted by a special tool, which is inconvenient to use.

To this end, the inventors provide a back pressure valve structure that is easy to adjust.

SUMMERY OF THE UTILITY MODEL

In order to solve the inconvenient problem of traditional back pressure valve regulated pressure, this application provides a back pressure valve structure convenient to adjust, has the convenient effect of pressure regulating.

The application provides a back pressure valve structure convenient to adjust adopts following technical scheme:

the utility model provides a back pressure valve structure convenient to adjust, includes valve body and elastic component, go up and seted up cylindrical last valve pocket in the valve body, the elastic component is installed go up the valve pocket, still including setting up regulation seat and rotation setting in going up the valve pocket are in go up adjusting screw on the valve body, adjust the seat and follow the elevating movement is made to the axial of going up the valve pocket, adjusting screw follows the axial setting of going up the valve pocket, adjusting screw wear to establish adjust the seat and with adjust seat screw-thread fit, adjust the seat butt the elastic component, the last portion of twisting that is provided with of adjusting screw, twist move the portion set up in go up the valve body outside.

Through adopting above-mentioned technical scheme, set up adjusting screw and regulation seat, adjust seat and screw rod screw-thread fit, rotate adjusting screw and can make the regulation seat be linear motion in last valve chamber, make through rotating adjusting screw and adjust the seat and compress tightly or loosen the elastic component, can adjust back pressure valve's opening pressure, adjusting screw's the portion of twisting, can process into the shape that the spanner of being convenient for or other instruments can be twisted as required to it is more convenient to make back pressure valve's regulation. The adjusting screw rod is rotated to drive the adjusting seat to lift, the size of the adjusting seat needs to be matched with the upper valve cavity, but the size of the adjusting screw rod does not need to be, and compared with the related art, the size of a screwing part at the end part of the adjusting screw rod can be controlled within a conventional range so as to be matched with various conventional tools; and adjusting screw, twisting the portion and can not take place to go up and down at the pressure regulating in-process, its position can not change, rotates the condition that the piece also can take place to go up and down in the correlation technique relatively, and the portion of twisting of this application is more convenient for operate.

Optionally, the main body of the adjusting seat is a plate body in sliding fit with the upper valve cavity, a positioning groove is axially formed in the side wall of the upper valve cavity, a positioning block is arranged on the adjusting seat corresponding to the positioning groove, and the positioning block is in sliding fit with the positioning groove.

Through adopting above-mentioned technical scheme, set up the constant head tank on the lateral wall of last valve pocket, set up in constant head tank sliding fit's locating piece on adjusting the seat, make the seat of adjusting can only be in last valve pocket along the axial of last valve pocket and do linear motion, but can not rotary motion, when rotating adjusting screw, through the helicitic texture, adjust the seat and can change adjusting screw's rotary motion into self linear motion.

Optionally, the elastic element is a spring, and a positioning boss in insertion fit with the spring is arranged at one end of the adjusting seat close to the spring.

Through adopting above-mentioned technical scheme, the spring cooperates with the location boss, can restrict the position relation between spring and the regulation seat, prevents the spring and adjusts the mutual diastrophism between the seat, causes the pressure instability of back pressure valve.

Optionally, the upper valve cavity is set to be cylindrical, the adjusting screw rod and the upper valve cavity are coaxially arranged, and the positioning boss and the adjusting seat are coaxially arranged.

By adopting the technical scheme, the adjusting screw rod and the upper valve cavity are coaxially arranged, when the adjusting screw rod adjusts the adjusting seat, the center of the adjusting seat bears the power transmitted by the adjusting screw rod, the stress of the adjusting seat is balanced, and the smooth lifting of the adjusting seat is facilitated; the location boss sets up with adjusting the seat is coaxial, can ensure that the spring installation back is coaxial with adjusting the seat, helps the stable regulation of air-vent valve pressure.

Optionally, the valve body further comprises an upper top cover arranged at one end of the upper valve cavity, a through hole is formed in the upper top cover in a penetrating mode, the adjusting screw rod is arranged in the through hole in a penetrating mode, a boss with the diameter larger than that of the through hole is arranged in the middle of the adjusting screw rod, and the boss abuts against one side, close to the adjusting seat, of the upper top cover.

By adopting the technical scheme, the upper top cover is arranged, the adjusting screw rod is clamped between the adjusting seat and the upper top cover, and the adjusting screw rod can rotate; in the use, when needing to change or maintain the elastic component, only need to go up the top cap and take out the spare part in the upper valve chamber apart, carry out relevant operation, it is convenient to maintain.

Optionally, the upper top cover is set to be circular, the upper top cover is in threaded connection with the upper valve cavity, a positioning hole is formed in the joint of the upper top cover and the upper valve body, one half of the positioning hole is located on the upper top cover, the other half of the positioning hole is located on the upper valve body, and a set screw is installed in the positioning hole.

By adopting the technical scheme, the upper top cover is in threaded connection with the upper valve cavity, so that the upper top cover is more convenient to mount and dismount; a positioning hole is formed in the joint of the upper top cover and the upper valve body, and a set screw is installed in the positioning hole, so that the rotation of the upper top cover can be limited, and the looseness of the upper top cover in the use process is prevented.

Optionally, the pressure seat is arranged in the upper valve cavity, the pressure seat is in sliding fit with the upper valve cavity, the pressure seat is installed at one end, far away from the adjusting seat, of the spring, a spring groove in splicing fit with the spring is formed in one end, close to the spring, of the pressure seat, and the spring is spliced in the spring groove and abuts against the pressure seat.

Through adopting above-mentioned technical scheme, press the seat to fix the lower extreme of spring, can guarantee the stability of spring lower extreme position, with the cooperation of the location boss on adjusting the seat, can guarantee that the both ends at spring both ends do not all take place the skew, ensure the spring and normally work.

Optionally, an exhaust hole is formed in the side wall of the upper valve body in a penetrating mode, and the exhaust hole is located between the adjusting seat and the pressing seat.

Through adopting above-mentioned technical scheme, when carrying out pressure regulation or water pressure to the back pressure valve and push up open the diaphragm, the air pressure of going up the valve intracavity can change, through seting up the exhaust hole on the lateral wall of last valve body, can make the air and external intercommunication in the valve intracavity, makes the atmospheric pressure of going up the valve intracavity unanimous with external, makes the opening pressure of valve not influenced by the atmospheric pressure of going up the valve intracavity, improves the precision of controlling back pressure valve opening pressure.

Optionally, still include lower valve body and diaphragm, it installs to go up the valve body on the valve body down, the diaphragm is installed go up the valve body with between the valve body down, set up feed liquor pipeline and liquid outlet pipe way in the valve body down, the feed liquor pipeline with liquid outlet pipe way is close to the one end parallel arrangement of diaphragm, the diaphragm butt is sealed feed liquor pipeline with liquid outlet pipe way, press the seat butt the diaphragm.

By adopting the technical scheme, the spring and the pressing seat are utilized to tightly abut against the diaphragm, the diaphragm presses the end parts of the liquid inlet pipeline and the liquid outlet pipeline to separate the liquid inlet pipeline from the liquid outlet pipeline, and the liquid can enter the liquid outlet pipeline after the diaphragm is pushed open by overcoming the elastic force of the spring through hydraulic pressure. The pressing seat is arranged between the spring and the diaphragm, so that the spring can be prevented from damaging the diaphragm, and meanwhile, the pressing seat can enable the diaphragm to be tightly and uniformly pressed at the liquid inlet pipeline; the pressure of the spring can be adjusted by adjusting the adjusting screw rod, so that the purpose of controlling the opening pressure of the valve is achieved.

In summary, the present application includes at least one of the following beneficial technical effects:

the adjusting screw rod is rotated to drive the adjusting seat to lift, the size of the adjusting seat needs to be matched with the upper valve cavity, but the size of the adjusting screw rod does not need to be, compared with the related technology, the size of the screwing part at the end part of the adjusting screw rod can be controlled within a conventional range so as to be matched with various conventional tools, and the screwing part does not lift in the pressure adjusting process, so that the operation is more convenient;

through set up the constant head tank on the lateral wall of last valve pocket, set up in constant head tank sliding fit's locating piece on adjusting the seat, make and adjust the seat and can only be linear motion along the axial of last valve pocket in last valve pocket, when rotating adjusting screw, adjust the seat and can change adjusting screw's rotary motion into linear motion, compare in the correlation technique, there is rotational friction between screw thread post and the spring when the screw thread post rotates, and the in-process spring of adjusting can take place a certain amount of distortion, and do not have relative rotation between adjusting seat and the spring, can increase the life of spring.

Drawings

FIG. 1 is a schematic structural diagram of the background art of the embodiment of the present application;

FIG. 2 is a schematic diagram of the overall structure of an embodiment of the present application;

fig. 3 is an enlarged schematic view of region a in fig. 2.

Reference numerals: 1. an upper valve body; 11. an upper valve cavity; 12. positioning a groove; 13. an exhaust hole; 2. a flange plate; 3. an adjusting seat; 31. positioning blocks; 32. positioning the boss; 4. adjusting the screw rod; 41. a screwing part; 42. a boss; 5. a top cover is arranged; 51. a through hole; 6. a spring; 7. positioning holes; 8. tightening the screw; 9. a lower valve body; 91. a liquid inlet pipeline; 92. a liquid outlet pipeline; 10. pressing a base; 16. a spring slot; 110. a membrane; 120. a threaded post; 121. and (6) rotating the block.

Detailed Description

The present application is described in further detail below with reference to figures 2-3.

Referring to fig. 2, the embodiment of the present application discloses a back pressure valve structure convenient for adjustment, which includes an upper valve body 1, an upper top cover 5, an adjusting screw 4, an adjusting seat 3, an elastic member, a pressing seat 10, a diaphragm 110 and a lower valve body 9. The lower valve body 9 is a cylindrical structure, and a liquid inlet pipeline 91 and a liquid outlet pipeline 92 are arranged in the lower valve body 9. The main body structure of the upper valve body 1 is a cylinder, an upper valve cavity 11 is coaxially arranged on the upper valve body 1 in a penetrating manner, an exhaust hole 13 is arranged on the side wall of the upper valve cavity 11 in a penetrating manner, and an upper top cover 5, an adjusting screw rod 4, an adjusting seat 3, an elastic piece and a pressing seat 10 are all arranged in the upper valve cavity 11; a flange plate 2 is integrally arranged at one end of the upper valve body 1, the size of the flange plate 2 is consistent with the outer diameter of the lower valve body 9, and the flange plate 2 is installed on the lower valve body 9 through bolts.

Referring to fig. 2 and 3, the upper top cover 5 is a circular plate, and threads are cut on the circumferential side of the upper top cover 5; threads matched with the upper top cover 5 are lathed at one end of the upper valve cavity 11 far away from the flange plate 2, and the upper top cover 5 is installed at one end of the upper valve cavity 11 far away from the flange plate 2. A positioning hole 7 is formed in the position, where the upper top cover 5 is connected with the upper valve body 1, of the upper top cover 5, one half of the positioning hole 7 is formed in the upper valve body 1, the positioning hole 7 is a threaded hole, and a set screw 8 is installed in the positioning hole 7 and used for preventing the upper top cover 5 from rotating in the using process.

Referring to fig. 3, the main body of the adjusting screw rod 4 is a cylindrical rod, a through hole 51 is coaxially formed in the middle of the upper top cover 5, one end of the adjusting screw rod 4 penetrates through the through hole 51, and the adjusting screw rod 4 is in clearance fit with the through hole 51; a boss 42 with the diameter larger than that of the through hole 51 is integrally arranged in the middle of the adjusting screw rod 4, and the boss 42 is positioned on one side of the upper top cover 5 close to the flange plate 2; the end, far away from the upper top cover 5, of the adjusting screw rod 4 is threaded, the adjusting seat 3 is coaxially sleeved on the adjusting screw rod 4, and the adjusting screw rod 4 is in threaded fit with the adjusting seat 3. One end of the adjusting screw rod 4 penetrating out of the upper top cover 5 is a screwing part 41, and the screwing part 41 is processed into a prism structure convenient for clamping a tool.

The main body of the adjusting seat 3 is a circular plate in sliding fit with the upper valve cavity 11, and one side of the adjusting seat 3 is integrally provided with a positioning block 31; a positioning groove 12 is formed in the side wall of the upper valve cavity 11, and the positioning groove 12 is formed in the axial direction of the upper valve cavity 11; the positioning block 31 is in sliding fit with the positioning groove 12, the positioning block 31 is inserted into the positioning groove 12, and the positioning block 31 enables the adjusting seat 3 to only lift along the axial direction and not to rotate around the axial direction.

The elastic component sets up to spring 6, adjusts seat 3 and keeps away from one side and the 6 butt of spring of top cap 5, and coaxial an organic whole be provided with spring 6 grafting complex location boss 32, can play the positioning action to spring 6's tip on establishing location boss 32 in the spring 6 cover.

The pressing seat 10 is arranged at one end, far away from the adjusting seat 3, of the spring 6, the pressing seat 10 is arranged to be a cylinder in sliding fit with the upper valve cavity 11, a spring groove 16 in splicing fit with the spring 6 is coaxially formed in one end, close to the spring 6, of the pressing seat 10, and the end portion of the spring 6 is inserted into the spring groove 16.

The diaphragm 110 is made of circular rubber, and the diaphragm 110 is arranged at one end of the upper valve cavity 11 far away from the upper top cover 5 and is coaxial with the upper valve cavity 11; the diaphragm 110 is clamped and fixed between the upper valve body 1 and the lower valve body 9.

Liquid inlet pipe 91 and liquid outlet pipe 92 in lower valve body 9 all set up to L shape, and liquid inlet pipe 91 and liquid outlet pipe 92 are close to the body parallel arrangement of last valve body 1 one end and all towards diaphragm 110, and diaphragm 110 seals the mouth of pipe that liquid inlet pipe 91 and liquid outlet pipe 92 should. The pressure seat 10 abuts against the diaphragm 110 under the elastic force of the spring 6, and presses the diaphragm 110 against the liquid inlet pipe 91 to seal the pipe mouth of the liquid inlet pipe 91.

The implementation principle of the back pressure valve structure convenient to adjust disclosed by the embodiment of the application is: the adjusting screw rod 4, the adjusting seat 3 and the upper top cover 5 are arranged to replace a threaded column 120 and a rotating block 121 in the related art, and the screwing part 41 is arranged on the adjusting screw rod 4, so that the opening and closing pressure of the back pressure valve can be adjusted through the rotation of the working clamping screwing part 41. The adjusting screw rod 4 has a smaller diameter, and the screwing part 41 can be processed into a shape convenient to screw according to a common tool, so that the adjustment of the back pressure valve is more convenient. Meanwhile, when the adjusting screw rod 4 is rotated, the adjusting seat 3 slides in the upper valve cavity 11 along the axial direction of the upper valve cavity 11, no friction exists between the adjusting seat 3 and the spring 6, and the service life of the spring 6 can be prolonged.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a back pressure valve structure convenient to adjust, includes valve body (1) and elastic component, upward offer cylindrical last valve pocket (11) in valve body (1), the elastic component is installed go up in valve pocket (11), its characterized in that: still including setting up regulation seat (3) and rotation in last valve pocket (11) set up adjusting screw (4) on last valve body (1), adjust seat (3) and follow the axial of going up valve pocket (11) is made elevating movement, adjusting screw (4) are followed the axial setting of last valve pocket (11), wearing to establish of adjusting screw (4) adjust seat (3) and with adjust seat (3) screw-thread fit, adjust seat (3) butt the elastic component, be provided with on adjusting screw (4) and twist portion (41), twist portion (41) set up in go up the valve body (1) outside.

2. A back pressure valve structure to facilitate regulation according to claim 1, wherein: the main part of adjusting seat (3) be with go up valve pocket (11) sliding fit's plate body, go up and seted up constant head tank (12) along the axial on the lateral wall of valve pocket (11), adjust and correspond on seat (3) constant head tank (12) are provided with locating piece (31), locating piece (31) with constant head tank (12) sliding fit.

3. A back pressure valve structure to facilitate regulation according to claim 2, wherein: the elastic piece is arranged as a spring (6), and one end of the adjusting seat (3) close to the spring (6) is provided with a positioning boss (32) which is in plug-in fit with the spring (6).

4. A back pressure valve structure to facilitate regulation according to claim 3, wherein: the upper valve cavity (11) is cylindrical, the adjusting screw rod (4) and the upper valve cavity (11) are coaxially arranged, and the positioning boss (32) and the adjusting seat (3) are coaxially arranged.

5. A back pressure valve structure to facilitate regulation according to claim 4, wherein: still including setting up last top cap (5) of going up valve pocket (11) one end, go up and run through on top cap (5) and seted up through-hole (51), adjusting screw (4) wear to locate in through-hole (51), the middle part of adjusting screw (4) is equipped with the diameter and is greater than boss (42) of through-hole (51), boss (42) butt go up top cap (5) and be close to one side of adjusting seat (3).

6. A back pressure valve structure to facilitate regulation according to claim 5, wherein: go up top cap (5) and set up to circular, go up top cap (5) with go up valve pocket (11) threaded connection, go up top cap (5) with locating hole (7) have been seted up to the junction of going up valve body (1), locating hole (7) half are located go up top cap (5) and go up half a position on going up valve body (1), install holding screw (8) in locating hole (7).

7. A back pressure valve structure to facilitate regulation according to claim 3, wherein: the pressure valve is characterized by further comprising a pressure seat (10) arranged in the upper valve cavity (11), the pressure seat (10) is in sliding fit with the upper valve cavity (11), the pressure seat (10) is installed at one end, far away from the adjusting seat (3), of the spring (6), one end, close to the spring (6), of the pressure seat (10) is provided with a spring groove (16) in insertion fit with the spring (6), and the spring (6) is inserted into the spring groove (16) and abutted to the pressure seat (10).

8. A back pressure valve structure to facilitate regulation according to claim 7, wherein: the side wall of the upper valve body (1) is provided with an exhaust hole (13) in a penetrating mode, and the exhaust hole (13) is located between the adjusting seat (3) and the pressing seat (10).

9. A back pressure valve structure to facilitate regulation according to claim 7, wherein: still include lower valve body (9) and diaphragm (110), it installs to go up valve body (1) on lower valve body (9), install diaphragm (110) go up valve body (1) with down between valve body (9), set up inlet liquid pipeline (91) and liquid pipeline (92) down in valve body (9), inlet liquid pipeline (91) with liquid pipeline (92) are close to the one end parallel arrangement of diaphragm (110), diaphragm (110) butt is sealed inlet liquid pipeline (91) with liquid pipeline (92), press seat (10) butt diaphragm (110).