CN215721116U

CN215721116U - Flange connection cock

Info

Publication number: CN215721116U
Application number: CN202121907047.8U
Authority: CN
Inventors: 项策; 倪海宁; 汪德维
Original assignee: Yadeng Valve Pipe Fittings Co ltd
Current assignee: Yadeng Valve Pipe Fittings Co ltd
Priority date: 2021-08-13
Filing date: 2021-08-13
Publication date: 2022-02-01
Anticipated expiration: 2031-08-13

Abstract

The utility model discloses a flange connection cork, which comprises a valve body and a valve stem. The valve body is provided with an inlet flow channel, an outlet flow channel, an upper cavity and a lower cavity, and the upper cavity is communicated with the lower cavity. , the inlet flow channel is communicated with the lower cavity, the outlet flow channel is communicated with the upper cavity, the lower part of the valve stem penetrates the upper cavity, the lower end of the valve stem is provided with a valve core for contacting the outer end of the lower cavity, and the upper end of the valve stem A hand wheel is provided; it also includes a connecting flange, the middle of the connecting flange is provided with an installation groove along the axial direction, and a central screw hole is opened in the middle of the installation groove. For interference fit, the connecting flange is provided with a plurality of connecting screw holes in the circumferential direction for screwing bolts, and the bottom of the connecting flange is provided with a positioning convex portion. The utility model is not only convenient for disassembly and assembly, which is beneficial to the maintenance operation in the later period, but also has good sealing performance and is not easy to produce medium leakage.

Description

Flange connection cock

Technical Field

The utility model relates to the technical field of valves, in particular to a flange connection cock.

Background

COCK (COCK), refers to a small COCK-type valve. Mainly used for opening and closing pipelines and equipment media. The valve is a valve which uses a plug body with a through hole as a starting and closing piece. The plug body rotates along with the valve rod so as to realize opening and closing actions. Small plug valves without filler are also known as cocks. The plug body of the plug valve is mostly a cone (also a cylinder), and the plug body is matched with the conical hole surface of the valve body to form a sealing pair. The plug valve is the earliest valve used and has the advantages of simple structure, quick opening and closing and small fluid resistance. Ordinary plug valve (cock) adopts threaded connection or welded mode to be connected with the medium pipeline usually, and the former is though easy dismounting, but joint strength is low, and the leakproofness is poor, and the latter is though firm in connection, and the leakproofness is good, but difficult dismantlement is unfavorable for the maintenance operation in later stage.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a flange connection cock, which is convenient to assemble and disassemble, favorable for later maintenance operation, good in sealing performance and not easy to generate medium leakage.

In order to achieve the purpose, the utility model provides the following technical scheme: a flange joint cock comprises a valve body and a valve rod, wherein an inlet flow passage, an outlet flow passage, an upper cavity and a lower cavity are arranged on the valve body, the upper cavity is communicated with the lower cavity, the inlet flow passage is communicated with the lower cavity, the outlet flow passage is communicated with the upper cavity, the lower part of the valve rod penetrates through the upper cavity, a valve core used for abutting against the outer end of the lower cavity is arranged at the lower end of the valve rod, and a hand wheel is arranged at the upper end of the valve rod; still include flange, the flange middle part is equipped with the mounting groove along the axial, and central screw has been seted up at the mounting groove middle part, the position that lies in the import runner outer end on the valve body with mounting groove interference fit, flange is last to prolong the connection screw that circumference was seted up a plurality of confession bolt screw in, and flange's bottom is equipped with the location convex part.

Through adopting above-mentioned technical scheme, realize the effective connection of cock and medium pipeline through flange joint's mode, this cock when the installation, the position of valve body import runner outer end is inserted and is established in the mounting groove at flange middle part to the two interference fit, its connection structure dismouting is very convenient, does benefit to the maintenance operation in later stage, and the leakproofness is good moreover, is difficult for producing the medium and leaks.

The utility model is further provided with a sealing gasket, the sealing gasket is arranged in the mounting groove and is used for forming sealing fit with the position, located at the outer end of the inlet flow channel, of the valve body, a plurality of positioning convex ribs are concentrically arranged on the sealing gasket, and a plurality of positioning grooves matched with the positioning convex ribs are arranged on the inner end surface of the mounting groove.

Through adopting above-mentioned technical scheme, not only can show the leakproofness that promotes between flange and the valve body, cushion when can be to valve body and flange contact moreover, collision production when avoiding valve body and flange joint damages.

The utility model is further provided that the central screw hole is in threaded connection with a protection plug, and the outer end of the protection plug is provided with an inner hexagonal groove.

Through adopting above-mentioned technical scheme, will protect end cap screw in flange's central screw when idle, can play the effect of protection flange, can avoid again that the dust enters into the inside pollution that causes of valve body to the valve body through central screw.

The sampling valve is further provided with a sampling hole communicated with the upper cavity, the sampling hole is screwed with a sampling bolt, and a gasket is clamped between the bolt head of the sampling bolt and the outer side of the valve body.

Through adopting above-mentioned technical scheme, can carry out online sample when operating personnel unscrews the sampling bolt, it is very convenient to operate.

The valve body is provided with a sealing groove coaxial with the valve rod at the position of the outer end of the upper cavity, the sealing packing and the packing pressing sleeve are arranged in the sealing groove from inside to outside, the pressing nut is connected to the upper part of the valve body in a threaded mode, and when the pressing nut is screwed, the pressing nut presses on the packing pressing sleeve, so that the packing pressing sleeve presses the sealing packing in the sealing groove.

Through adopting above-mentioned technical scheme, increase the leakproofness between valve body upper end and the valve rod, avoid the medium to leak from the clearance between the two.

The utility model is further provided that the inner wall of the upper cavity is provided with an internal thread section, and the valve rod is provided with a stud section which forms thread fit with the internal thread section.

Through adopting above-mentioned technical scheme, when rotating the hand wheel and making the valve rod take place to rotate, can realize the lift of valve rod, it is very convenient to operate, and the valve rod motion is very stable.

The utility model is further provided with a butt joint component which is arranged on the valve body and is positioned at the outer end of the outlet flow channel, the butt joint component comprises sealing rubber and a butt joint nut, the outer end of the outlet flow channel is sequentially provided with a first circular groove and a second circular groove, a limiting step is formed between the first circular groove and the second circular groove, the sealing rubber comprises a guide part, an extrusion part and a supporting part, the guide part is inserted into the second circular groove, the extrusion part abuts against the outer end face of the valve body positioned on the second circular groove, the butt joint nut is in threaded connection with the valve body, and the butt joint nut is provided with a pressing part which extends inwards and is used for abutting against the supporting part.

Through adopting above-mentioned technical scheme, after the medium pipeline inserted sealing rubber, the butt joint nut of screwing, sealing rubber just can hold the medium pipeline tightly, and it is very convenient to connect the operation, and the leakproofness is strong simultaneously.

The utility model is further provided that the joint of the guide part and the extrusion part is provided with an annular groove along the circumferential direction, and the section of the annular groove is in a semicircular shape.

By adopting the technical scheme, the junction of the guide part and the extrusion part can be deformed more easily, the stress concentration of the junction of the guide part and the extrusion part is avoided, and the effect of protecting the sealing rubber is achieved.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is an enlarged view of the portion A in FIG. 1;

FIG. 3 is a schematic structural view of the seal assembly of the present invention;

fig. 4 is a schematic structural diagram of the docking assembly of the present invention.

In the figure: 1. a valve body; 2. a valve stem; 3. an inlet flow channel; 4. an outlet flow passage; 5. an upper chamber; 6. a lower cavity; 7. a valve core; 8. a hand wheel; 9. a connecting flange; 10. mounting grooves; 11. a central screw hole; 12. a positioning projection; 13. a gasket; 14. positioning the convex ribs; 15. a positioning groove; 16. protecting the plug; 17. an inner hexagonal groove; 18. a sampling hole; 19. a sampling bolt; 20. a gasket; 21. a seal assembly; 22. sealing and filling; 23. pressing and sleeving the filler; 24. a compression nut; 25. a sealing groove; 26. an internal thread section; 27. a stud segment; 28. a docking assembly; 29. sealing rubber; 30. butting nuts; 31. a first circular groove; 32. a second circular groove; 33. a limiting step; 34. a guide portion; 35. a pressing section; 36. a support portion; 37. a pressing part; 38. an annular groove; 39. and connecting the screw holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): the flange connection cock as shown in the attached drawings 1-4 comprises a valve body 1 and a valve rod 2, wherein an inlet flow passage 3, an outlet flow passage 4, an upper cavity 5 and a lower cavity 6 are arranged on the valve body 1, the upper cavity 5 is communicated with the lower cavity 6, the diameter of the upper cavity 5 is larger than that of the lower cavity 6, the inlet flow passage 3 is communicated with the lower cavity 6, the outlet flow passage 4 is communicated with the upper cavity 5, the lower part of the valve rod 2 penetrates through the upper cavity 5, a valve core 7 which is supported at the outer end of the lower cavity 6 is arranged at the lower end of the valve rod 2, the valve core 7 and the valve rod 2 are of an integrated structure, the valve core 7 is in a conical shape with a large upper end and a small lower end, a hand wheel 8 is arranged at the upper end of the valve rod 2, and the upper end of the valve rod 2 and the hand wheel 8 can be welded or joggled; still include flange 9, flange 9 middle part is equipped with mounting groove 10 along the axial, and central screw 11 has been seted up at mounting groove 10 middle part, and the diameter of mounting groove 10 is greater than the diameter of central screw 11, the position that lies in 3 outer ends of inlet flow channel on the valve body 1 with 10 interference fit of mounting groove, flange 9 is last to prolong circumference and has seted up a plurality of connecting screw 39 that supply the bolt screw in, and flange 9's bottom is equipped with location convex part 12, and location convex part 12 is used for agreeing with mutually with the recess of the flange on the medium pipeline, even if be in two flange butt joint location. Realize the effective connection of cock and medium pipeline through flange joint's mode, this cock when the installation, the position of 3 outer ends of valve body 1 inlet flow channel is inserted and is established in mounting groove 10 at flange 9 middle part to the two interference fit, its connection structure dismouting is very convenient, does benefit to the maintenance operation in later stage, and the leakproofness is good moreover, is difficult for producing the medium and leaks.

As shown in attached

drawings

1 and 2, still include sealed pad 13, sealed pad 13 is the rubber material, sealed pad 13 sets up in mounting groove 10 be used for with the valve body 1 on the position that lies in 3 outer ends of inlet flow channel constitute sealed cooperation, sealed pad 13 is last to be concentric a plurality of protruding muscle 14 of being provided with, be equipped with a plurality of with on the terminal surface in mounting groove 10 location protruding muscle 14 matched with positioning groove 15. This design not only can show the leakproofness that promotes between flange 9 and the valve body 1, cushions when moreover can be to valve body 1 and flange contact, and the collision produces the damage when avoiding valve body 1 and flange to connect.

As shown in fig. 1, a protective plug 16 is connected to the central screw hole 11 in a threaded manner, and an inner hexagonal groove 17 is formed in the outer end of the protective plug 16. When the valve body is idle, the protective plug 16 is screwed into the central screw hole 11 of the connecting flange 9, so that the connecting flange 9 can be protected, and dust can be prevented from entering the valve body 1 through the central screw hole 11 to pollute the inside of the valve body 1.

As shown in fig. 1, a sampling hole 18 communicated with the upper chamber 5 is formed in the side of the valve body 1, a sampling bolt 19 is screwed on the sampling hole 18, and a gasket 20 is clamped between the bolt head of the sampling bolt 19 and the outer side of the valve body 1. The operator can carry out on-line sampling when screwing out the sampling bolt 19, and the operation is very convenient.

As shown in fig. 1 and fig. 3, the sealing assembly 21 further includes a sealing assembly 21, the sealing assembly 21 includes a sealing packing 22, a packing pressing sleeve 23, and a compression nut 24, a sealing groove 25 coaxial with the valve rod 2 is disposed at a position on the valve body 1 at the outer end of the upper chamber 5, the sealing packing 22 and the packing pressing sleeve 23 are disposed in the sealing groove 25 from inside to outside, the compression nut 24 is screwed to the upper portion of the valve body 1, and when the compression nut 24 is screwed, the compression nut 24 presses the packing pressing sleeve 23, so that the packing pressing sleeve 23 presses the sealing packing 22 in the sealing groove 25. The design increases the sealing performance between the upper end of the valve body 1 and the valve rod 2, and avoids the leakage of a medium from a gap between the upper end of the valve body and the valve rod.

As shown in fig. 1, an internal thread section 26 is provided on the inner wall of the upper chamber 5, and a stud section 27 forming a thread fit with the internal thread section 26 is provided on the valve rod 2. When the hand wheel 8 is rotated to rotate the valve rod 2, the lifting of the valve rod 2 can be realized, the operation is very convenient, and the movement of the valve rod 2 is very stable.

As shown in fig. 1 and 4, the valve further comprises a docking assembly 28 disposed on the valve body 1 and located at the outer end of the outlet flow channel 4, the docking assembly 28 includes a sealing rubber 29 and a docking nut 30, the outer end of the outlet flow channel 4 is sequentially provided with a first circular groove 31 and a second circular groove 32, a limit step 33 is formed between the first circular groove 31 and the second circular groove 32, the sealing rubber 29 includes a guide portion 34, a pressing portion 35 and a support portion 36, the guide portion 34 is inserted into the second circular groove 32, the pressing portion 35 abuts against the outer end surface of the valve body 1 located on the second circular groove 32, the docking nut 30 is screwed onto the valve body 1, and a pressing portion 37 extending inward and abutting against the support portion 36 is disposed on the docking nut 30. After the medium pipeline is inserted into the sealing rubber 29, the butt-joint nut 30 is screwed, the sealing rubber 29 can hold the medium pipeline tightly, the connection operation is very convenient, and meanwhile, the sealing performance is strong.

As shown in fig. 4, an annular groove 38 is circumferentially disposed at a junction of the guide portion 34 and the pressing portion 35, and the annular groove 38 has a semicircular cross section. This design can make the junction of guide portion 34 and extrusion portion 35 warp more easily, avoids the junction stress concentration of guide portion 34 and extrusion portion 35, plays the effect of protection sealing rubber 29.

Claims

1. A flange connection cock, comprising a valve body (1) and a valve stem (2), the valve body (1) is provided with an inlet flow channel (3), an outlet flow channel (4), an upper cavity ( 5) and a lower cavity (6), the upper cavity (5) communicates with the lower cavity (6), the inlet flow channel (3) communicates with the lower cavity (6), and the outlet flow channel (4) It communicates with the upper cavity (5), the lower part of the valve stem (2) penetrates the upper cavity (5), and the lower end of the valve stem (2) is provided with a valve core (7) for abutting against the outer end of the lower cavity (6). (2) The upper end is provided with a hand wheel (8); it is characterized in that: it also includes a connecting flange (9), the middle of the connecting flange (9) is provided with a mounting groove (10) along the axial direction, and the mounting groove (10) A central screw hole (11) is opened in the middle, the part of the valve body (1) located at the outer end of the inlet flow channel (3) is in an interference fit with the installation groove (10), and the connecting flange (9) extends upward. A plurality of connecting screw holes (39) into which the bolts are screwed are provided in the circumferential direction, and the bottom of the connecting flange (9) is provided with a positioning protrusion (12).

2. The flange connection cork according to claim 1, characterized in that it further comprises a gasket (13), and the gasket (13) is arranged in the installation groove (10) for connecting with the valve body (1). ) on the outer end of the inlet flow channel (3) to form a sealing fit, a plurality of positioning ribs (14) are arranged concentrically on the sealing gasket (13), and a plurality of positioning ribs (14) are arranged on the inner end surface of the installation groove (10). a positioning groove (15) matched with the positioning protruding ribs (14).

3. A flange connection cork according to claim 1, characterized in that: the central screw hole (11) is threadedly connected with a protective plug (16), and the outer end of the protective plug (16) is provided with an inner Hexagon slot (17).

4. A flanged connection cork according to claim 1, characterized in that: a sampling hole (18) communicating with the upper cavity (5) is provided on the side of the valve body (1), and the sampling hole (18) communicates with the upper cavity (5). (18) A sampling bolt (19) is screwed on, and a gasket (20) is sandwiched between the bolt head of the sampling bolt (19) and the outside of the valve body (1).

5. A flange connection cork according to claim 1, characterized in that it further comprises a sealing assembly (21), the sealing assembly (21) comprising a sealing packing (22), a packing pressing sleeve (23) and a pressure Tighten the nut (24), the valve body (1) is provided with a sealing groove (25) coaxial with the valve stem (2) at the outer end of the upper chamber (5), the sealing packing (22) and the packing pressure The sleeve (23) is arranged in the sealing groove (25) from the inside to the outside, the compression nut (24) is threadedly connected to the upper part of the valve body (1), and when the compression nut (24) is tightened, the compression nut ( 24) Press on the packing press sleeve (23), so that the packing press sleeve (23) presses the sealing packing (22) into the sealing groove (25).

6. A flange connection cork according to claim 1, characterized in that: the inner wall of the upper cavity (5) is provided with an internal thread segment (26), and the valve stem (2) is provided with a The internal thread segment (26) constitutes a threaded stud segment (27).

7. A flange connection cork according to claim 1, characterized in that it further comprises a butt assembly (28) disposed on the valve body (1) and located at the outer end of the outlet channel (4), the butt assembly ( 28) Including a sealing rubber (29) and a butt nut (30), the outer end of the outlet flow channel (4) is sequentially provided with a first circular groove (31) and a second circular groove (32), the first circular groove (32) A limit step (33) is formed between the groove (31) and the second circular groove (32), and the sealing rubber (29) includes a guide part (34), a pressing part (35) and a supporting part (36), so The guide portion (34) is inserted into the second circular groove (32), the pressing portion (35) abuts on the outer end surface of the valve body (1) located in the second circular groove (32), and the butt nut (30) is screwed on the valve body (1), and the counter nut (30) is provided with a pressing portion (39) extending toward the inner circumference for abutting on the support portion (36).

8. A flange connection cork according to claim 7, characterized in that: an annular groove (38) is provided along the circumferential direction at the junction of the guide portion (34) and the extrusion portion (35), so The cross section of the annular groove (38) is in the shape of a semicircle.