CN214578887U

CN214578887U - Ultralow-temperature double-valve-clack hard sealing stop valve

Info

Publication number: CN214578887U
Application number: CN202120768578.7U
Authority: CN
Inventors: 张智博; 刘智; 蔡毅; 杨贵春; 叶志强; 蔡文博
Original assignee: TEJI VALVE GROUP CO Ltd
Current assignee: TEJI VALVE GROUP CO Ltd
Priority date: 2021-04-14
Filing date: 2021-04-14
Publication date: 2021-11-02
Anticipated expiration: 2031-04-14

Abstract

The utility model discloses an ultra-low temperature double-valve-clack hard sealing stop valve, which comprises a valve body, a valve cover, a valve rod, a valve clack and a valve seat, wherein the valve rod is arranged on the valve body, the valve rod penetrates through the valve cover and extends into the valve body to be connected with the valve clack, a first flow passage and a second flow passage are arranged at the two ends of the valve body, an overflowing opening is arranged in the valve body, and the valve seat is arranged on the overflowing opening; the valve clack comprises a large valve clack and a small valve clack, the small valve clack is arranged at the inner end of the valve rod, the large valve clack is arranged outside the small valve clack in an axial sliding mode, and a large valve clack cover is arranged on the large valve clack; an overflowing gap is formed between the large valve clack and the small valve clack, a first pressure relief hole is formed in the side portion of the large valve clack, a second pressure relief hole is formed in one end face, close to the overflowing opening, of the large valve clack, a first annular sealing convex portion is arranged on the large valve clack, and a second annular sealing convex portion which is used for forming sealing fit with the first annular sealing convex portion is arranged on the lower end face of the small valve clack. The utility model has the advantages of low torque, high leakproofness and long-life, can be applied to each workshop section of low temperature medium.

Description

Ultralow-temperature double-valve-clack hard sealing stop valve

Technical Field

The utility model relates to the technical field of valves, especially, relate to an ultra-low temperature bivalve clack hard seal stop valve.

Background

The stop valve is also called stop valve, belonging to forced sealing type valve. The opening and closing part of the stop valve is a plug-shaped valve clack, the upper surface of the seal is a plane or a sea cone surface, and the valve clack moves linearly along the central line of the valve seat. When the shut-off valve is closed, pressure must be applied to the flap to force the sealing surfaces from leaking. When the medium enters the valve from the lower part of the valve clack, the resistance to be overcome by the operating force is the friction force between the valve rod and the packing and the thrust generated by the pressure of the medium, the force for closing the valve is larger than the force for opening the valve, so the diameter of the valve rod is larger, otherwise the failure of the valve rod buckling can occur. After the self-sealing valve appears, the medium flow direction of the stop valve enters the valve cavity from the upper part of the valve clack, at the moment, the force for closing the valve is small, the force for opening the valve is large, and the diameter of the valve rod can be correspondingly reduced. At the same time, this type of valve is also relatively tight under the action of the medium.

In recent years, domestic production is basically realized on the demand of low-temperature stop valves in China, but the performance quality cannot meet the requirement of a low-temperature section, and a key high-performance section is imported from a country advanced from abroad, so that the cost is high, the supply period is long, and the economy and the construction period of related projects in China are greatly restricted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultra-low temperature bivalve clack hard seal stop valve, the utility model has the advantages of low torque, high leakproofness and long-life, can be applied to each workshop section of low temperature medium.

In order to achieve the above object, the utility model provides a following technical scheme: the ultralow-temperature double-valve-clack hard-sealing stop valve comprises a valve body, a valve cover, a valve rod, a valve clack and a valve seat, wherein the valve rod is arranged on the valve body, the valve rod penetrates through the valve cover and extends into the valve body to be connected with the valve clack, a first flow passage and a second flow passage are arranged at two ends of the valve body, an overflowing opening for communicating the first flow passage with the second flow passage is arranged in the valve body, and the valve seat is arranged on the overflowing opening and is used for forming sealing fit with the valve clack; the valve clack comprises a large valve clack and a small valve clack, the small valve clack is arranged at the inner end of the valve rod, the large valve clack is arranged outside the small valve clack in an axial sliding mode, and a large valve clack cover which can axially limit the small valve clack is arranged on the large valve clack; the valve is characterized in that an overflowing gap is formed between the large valve clack and the small valve clack, a first pressure relief hole communicated with the overflowing gap is formed in the side portion of the large valve clack, a second pressure relief hole communicated with the overflowing gap is formed in one end face, close to the overflowing opening, of the large valve clack, a first annular sealing convex portion is arranged at the inner end of the second pressure relief hole in the large valve clack, and a second annular sealing convex portion in sealing fit with the first annular sealing convex portion is arranged on the lower end face of the small valve clack.

Through adopting above-mentioned technical scheme, can reduce and open and close moment, the valve clack of this stop valve comprises big valve clack and little valve clack, has seted up first pressure release hole and second pressure release hole on the big valve clack, has the clearance that overflows that communicates first pressure release hole and second pressure release hole between big valve clack and the little valve clack. The medium flow direction is from top to bottom, and the small valve clack is lifted to release pressure when the valve is opened, namely, a medium flows through the first pressure release hole, the flow gap and the second pressure release hole from the first flow channel in sequence and finally enters the second flow channel, so that the light-moment opening is realized. When the valve is closed, the large valve clack is closed first, and finally the small valve clack is sealed. The design can reduce the moment when opening and closing, and the reduction of the moment correspondingly protects the sealing surfaces of the valve clack and the valve seat, thereby prolonging the service life of the valve.

The utility model discloses further set up to, ring groove has been seted up along circumference to valve rod inner, and the joint has to open the ring on the ring groove, go back threaded connection on the inner wall of little valve clack has little valve clack lid, and the upper end of little valve clack lid is equipped with and is used for supporting the first limit flange in little valve clack upper end, and the lower extreme of little valve clack lid supports on opening the up end of ring, and the inboard of little valve clack still is equipped with and opens the ring under the terminal surface inconsistent spacing step.

Through adopting above-mentioned technical scheme, can realize the quick assembly disassembly of little valve clack, do benefit to the maintenance operation in later stage.

The utility model discloses further set up to, big valve clack lid threaded connection is on the inner wall of big valve clack, and the upper end of big valve clack lid is equipped with and is used for supporting the second limit flange in big valve clack upper end.

Through adopting above-mentioned technical scheme, not only do benefit to the dismouting of big valve clack, enable the relative displacement between big valve clack and the little valve clack moreover more steady.

The utility model discloses further set up to, be equipped with on the big valve clack and be used for constituting sealed complex toper sealing with the disk seat, the build-up welding has cobalt base carbide in the toper sealing.

Through adopting above-mentioned technical scheme, can guarantee the wearability of toper sealing, promote the life of valve, the valve can realize closing the effect tighter and tighter more simultaneously in the closing process, guarantees the sealing performance of valve, does benefit to and uses in the low temperature medium.

The utility model discloses further set up to, the valve gap upper end is equipped with and is used for the cover at the extension sleeve pipe of valve rod periphery, and extension sleeve intraductal upper portion is equipped with the chamber of packing, and the valve rod periphery upper right is equipped with clamp plate, packs to press cover and gland packing in proper order down, and clamp plate is connected with extension sleeve pipe through the slipknot bolt, and clamp plate presses and is sheathe in packing, makes to pack to press the cover and establish gland packing in the chamber of packing.

Through adopting above-mentioned technical scheme, not only processing is convenient, and extension sleeve has the easy advantage that realizes sealedly of reduced pressure moreover to avoid the medium to leak to the valve outside.

The utility model discloses further set up to, the upper end of extension sleeve pipe is equipped with the installing support, and the inboard of installing support is equipped with along axially extended guide rail, install on the valve rod and prevent changeing the piece, prevent changeing and be equipped with the guide slot with guide rail looks adaptation on the piece.

Through adopting above-mentioned technical scheme, can restrict the valve rod rotation, thereby when actuating mechanism acted on the valve rod, thereby can drive the valve rod and go up and down to realize opening and close of valve.

The utility model discloses further set up to, prevent changeing the piece and include that two shapes are the same prevent changeing the piece, prevent being equipped with middle opening and side opening on changeing the piece, two prevent changeing the piece and be connected through the screw to two prevent that middle opening combination on changeing the piece forms and is used for the cover to establish the cup joint mouth in the valve rod periphery, be equipped with on the valve rod to be used for with the cutting portion that the socket joint mouth inner wall agrees with mutually, two prevent that the side opening combination on changeing the piece forms the guide slot.

Through adopting above-mentioned technical scheme, be convenient for prevent changeing the dismouting of piece, do benefit to the maintenance operation in later stage.

The utility model discloses further set up to, the last welding of extension sleeve has the drip tray.

Through adopting above-mentioned technical scheme, the back comes on the low temperature of low temperature medium, through the dish heat exchange that drips for the temperature at sealing filler position keeps above the zero degree, and the frosting does not freeze, prevents to appear sealed inefficacy, also can play the effect of manger plate simultaneously.

The utility model discloses further set up to, evenly be provided with a plurality of cyclic annular radiating grooves along radial on the extension sleeve pipe.

Through adopting above-mentioned technical scheme, not only can increase the heat-sinking capability, can also improve whole pleasing to the eye degree.

Drawings

FIG. 1 is a perspective view of the whole body of the present invention;

FIG. 2 is a cross-sectional view of the entire invention;

FIG. 3 is a schematic view of the installation structure of the valve flap of the present invention;

fig. 4 is a schematic view of the installation structure of the anti-rotation member of the present invention.

In the figure: 1. a valve body; 2. a valve cover; 3. a valve stem; 4. a valve flap; 5. a valve seat; 6. a first flow passage; 7. a second flow passage; 8. a flow-through port; 9. a large valve flap; 10. a small valve flap; 11. a large valve flap cover; 12. an over-current gap; 13. a first pressure relief vent; 14. a second pressure relief vent; 15. a first annular sealing protrusion; 16. a second annular seal land; 17. an annular neck; 18. opening the ring; 19. a small valve flap cover; 20. a first stop flange; 21. a limiting step; 22. a second position-defining flange; 23. a tapered seal portion; 24. a cobalt-based cemented carbide; 25. lengthening the sleeve; 26. a packing cavity; 27. a packing press plate; 28. pressing and sleeving the filler; 29. sealing and filling; 30. a slipknot bolt; 31. mounting a bracket; 32. a guide rail; 33. an anti-rotation member; 34. a guide groove; 35. a rotation prevention block; 36. a middle opening; 37. the side edge is open; 38. a socket; 39. a cutting portion; 40. a drip tray; 41. annular radiating groove.

Detailed Description

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

Example (b): the ultra-low temperature double-valve-clack hard-seal stop valve comprises a valve body 1, a valve cover 2, a valve rod 3, a valve clack 4 and a valve seat 5, wherein the valve rod 3 is installed on the valve body 1, the valve rod 3 penetrates through the valve cover 2 and extends into the valve body 1 to be connected with the valve clack 4, a first flow passage 6 and a second flow passage 7 are arranged at two ends of the valve body 1, an overflowing opening 8 for communicating the first flow passage 6 with the second flow passage 7 is formed in the valve body 1, the valve seat 5 is arranged on the overflowing opening 8 and used for forming sealing fit with the valve clack 4, and the valve seat 5 and the valve body 1 are of an integrated structure; the valve clack 4 comprises a large valve clack 9 and a small valve clack 10, the small valve clack 10 is installed at the inner end of the valve rod 3, the large valve clack 9 is arranged outside the small valve clack 10 in an axial sliding mode, and a large valve clack cover 11 which limits the small valve clack 10 in the axial direction is arranged on the large valve clack 9; an overflowing gap 12 is formed between the large valve flap 9 and the small valve flap 10, a first pressure relief hole 13 communicated with the overflowing gap 12 is formed in the side portion of the large valve flap 9, a second pressure relief hole 14 communicated with the overflowing gap 12 is formed in one end face, close to the overflowing opening 8, of the large valve flap 9, a first annular sealing convex portion 15 is arranged at the inner end of the second pressure relief hole 14 on the large valve flap 9, a second annular sealing convex portion 16 used for forming sealing fit with the first annular sealing convex portion 15 is arranged on the lower end face of the small valve flap 10, the large valve flap 9 and the small valve flap 10 generate relative displacement, and when the second annular sealing convex portion 16 on the small valve flap 10 abuts against the first annular sealing convex portion 15 of the large valve flap 9, the second pressure relief hole 14 is blocked. The mass flow direction is upward-in-downward-out, and the small valve flap 10 is lifted to release pressure when the valve is opened, namely, a medium flows through the first pressure release hole 13, the overflowing gap 12 and the second pressure release hole 14 from the first flow passage 6 in sequence and finally enters the second flow passage 7, so that the light-moment opening is realized. When the valve is closed, the large valve clack 9 is closed first, and finally the small valve clack 10 is sealed. The design can reduce the moment when the valve is opened and closed, the reduction of the moment correspondingly protects the sealing surfaces of the valve clack 4 and the valve seat 5, and the service life of the valve is prolonged.

As shown in fig. 3, an annular clamping groove 17 is formed in the inner end of the valve rod 3 along the circumferential direction, a split ring 18 is clamped on the annular clamping groove 17, the split ring is replaced by two semicircular rings with the same structure, a small valve flap cover 19 is further in threaded connection with the inner wall of the small valve flap 10, the small valve flap cover 19 is sleeved outside the valve rod 3, a first limiting flange 20 used for abutting against the upper end of the small valve flap 10 is arranged at the upper end of the small valve flap cover 19, the lower end of the small valve flap cover 19 abuts against the upper end face of the split ring 18, and a limiting step 21 abutting against the lower end face of the split ring 18 is further arranged on the inner side of the small valve flap 10. This design can realize little valve clack 10's quick assembly disassembly, does benefit to the maintenance operation in later stage.

As shown in fig. 3, the large valve flap cover 11 is screwed on the inner wall of the large valve flap 9, and the upper end of the large valve flap cover 11 is provided with a second limit flange 22 for abutting against the upper end of the large valve flap 9. This design not only does benefit to the dismouting of big valve clack 9, enables the relative displacement between big valve clack 9 and the little valve clack 10 moreover more steady.

As shown in fig. 3, a conical sealing portion 23 for forming a sealing fit with the valve seat 5 is provided on the large valve flap 9, and a cobalt-based cemented carbide 24 is welded on the conical sealing portion 23. The wearing resistance of toper sealing 23 can be guaranteed in this design, promotes the life of valve, and the valve can realize closing the effect tighter and tighter more simultaneously in the closing process, guarantees the sealing performance of valve, does benefit to and uses in the low temperature medium.

As shown in fig. 2, the upper end of the valve cap 2 is provided with a lengthened sleeve 25 for being sleeved on the periphery of the valve rod 3, the upper portion inside the lengthened sleeve 25 is provided with a packing cavity 26, the periphery of the valve rod 3 is sequentially provided with a packing pressing plate 27, a packing pressing sleeve 28 and a sealing packing 29 from top right to bottom, the packing pressing plate 27 is connected with the lengthened sleeve 25 through a slipknot bolt 30, the packing pressing plate 27 is pressed on the packing pressing sleeve 28, and the packing pressing sleeve 28 is enabled to press the sealing packing 29 in the packing cavity 26. The design is convenient to process, and the lengthened sleeve 25 has the advantage of reducing pressure and easily realizing sealing, so that the medium is prevented from leaking to the outside of the valve.

As shown in fig. 1 and 4, the upper end of the extension sleeve 25 is provided with a mounting bracket 31, the inner side of the mounting bracket 31 is provided with a guide rail 32 extending along the axial direction, the valve rod 3 is provided with an anti-rotation member 33, and the anti-rotation member 33 is provided with a guide groove 34 adapted to the guide rail 32. This design can restrict the valve rod 3 and rotate, thereby can drive valve rod 3 and go up and down to realize opening and close of valve when actuating mechanism acts on valve rod 3.

As shown in fig. 4, the anti-rotation block 35 includes two anti-rotation blocks 35 having the same shape, the anti-rotation block 35 is provided with a middle opening 36 and a side opening 37, the two anti-rotation blocks 35 are connected by a screw, the middle openings 36 on the two anti-rotation blocks 35 are combined to form a socket 38 for being sleeved on the periphery of the valve rod 3, the valve rod 3 is provided with a cutting portion 39 for being engaged with the inner wall of the socket 38, and the side openings 37 on the two anti-rotation blocks 35 are combined to form the guide groove 34. This design is convenient for prevent changeing the dismouting of piece 33, does benefit to the maintenance operation in later stage.

As shown in fig. 1, a drip tray 40 is welded to the extension sleeve 25. After the low temperature of the low-temperature medium comes, the temperature of the part of the sealing filler 29 is kept above zero through the heat exchange of the drip tray 40, so that the sealing filler is not frozen and frosted, the sealing failure is prevented, and the water retaining function can be realized.

As shown in fig. 1, a plurality of annular heat dissipation grooves 41 are uniformly arranged on the extension sleeve 25 along the radial direction, so that not only can the heat dissipation capacity be increased, but also the overall aesthetic degree can be improved.

The working principle is as follows: the utility model discloses can reduce and open and close moment, the valve clack 4 of this stop valve comprises big valve clack 9 and little valve clack 10, has seted up first pressure release hole 13 and second pressure release hole 14 on the big valve clack 9, has the clearance 12 that overflows that communicates first pressure release hole 13 and second pressure release hole 14 between big valve clack 9 and the little valve clack 10. The mass flow direction is upward-in-downward-out, and the small valve flap 10 is lifted to release pressure when the valve is opened, namely, a medium flows through the first pressure release hole 13, the overflowing gap 12 and the second pressure release hole 14 from the first flow passage 6 in sequence and finally enters the second flow passage 7, so that the light-moment opening is realized. When the valve is closed, the large valve clack 9 is closed first, and finally the small valve clack 10 is sealed. The design can reduce the moment when the valve is opened and closed, the reduction of the moment correspondingly protects the sealing surfaces of the valve clack 4 and the valve seat 5, and the service life of the valve is prolonged.

Claims

1. The ultralow-temperature double-valve-clack hard sealing stop valve comprises a valve body (1), a valve cover (2), a valve rod (3), a valve clack (4) and a valve seat (5), wherein the valve rod (3) is installed on the valve body (1), the valve rod (3) penetrates through the valve cover (2) and stretches into the valve body (1) to be connected with the valve clack (4), a first flow channel (6) and a second flow channel (7) are arranged at two ends of the valve body (1), an overflowing opening (8) for communicating the first flow channel (6) with the second flow channel (7) is formed in the valve body (1), and the valve seat (5) is arranged on the overflowing opening (8) and is used for forming sealing fit with the valve clack (4); the method is characterized in that: the valve clack (4) comprises a large valve clack (9) and a small valve clack (10), the small valve clack (10) is installed at the inner end of the valve rod (3), the large valve clack (9) is arranged outside the small valve clack (10) in an axial sliding mode, and a large valve clack cover (11) which limits the small valve clack (10) in the axial direction is arranged on the large valve clack (9); form between big valve clack (9) and little valve clack (10) and overflow clearance (12), the lateral part of big valve clack (9) is seted up and is overflowed first pressure release hole (13) that clearance (12) are linked together, offer on big valve clack (9) is close to an terminal surface of overflowing mouth (8) with overflowing second pressure release hole (14) that clearance (12) are linked together, the position that lies in second pressure release hole (14) inner on big valve clack (9) is equipped with first annular seal convex part (15), be equipped with on the lower terminal surface of little valve clack (10) and be used for constituting sealed complex second annular seal convex part (16) with first annular seal convex part (15).

2. The ultra-low temperature double-flap hard seal stop valve of claim 1, characterized in that: annular groove (17) have been seted up along circumference in valve rod (3) the inner, and the joint has to run from opposite directions ring (18) on annular groove (17), it has little valve clack lid (19) to go back threaded connection on the inner wall of little valve clack (10), and the upper end of little valve clack lid (19) is equipped with and is used for supporting first limit flange (20) in little valve clack (10) upper end, and the lower extreme of little valve clack lid (19) is supported on the up end of running from opposite directions ring (18), and the inboard of little valve clack (10) still is equipped with and runs from opposite directions ring (18) lower terminal surface inconsistent limit step (21).

3. The ultra-low temperature double-flap hard seal stop valve of claim 1, characterized in that: the large valve clack cover (11) is in threaded connection with the inner wall of the large valve clack (9), and a second limiting flange (22) used for abutting against the upper end of the large valve clack (9) is arranged at the upper end of the large valve clack cover (11).

4. The ultra-low temperature double-flap hard seal stop valve of claim 1, characterized in that: be equipped with on big valve clack (9) and be used for constituting sealed complex toper sealing (23) with valve seat (5), build-up welding has cobalt base carbide (24) on toper sealing (23).

5. The ultra-low temperature double-flap hard seal stop valve of claim 1, characterized in that: valve gap (2) upper end is equipped with extension sleeve pipe (25) that are used for the cover in valve rod (3) periphery, upper portion is equipped with packing chamber (26) in extension sleeve pipe (25), valve rod (3) periphery upper right is equipped with packing clamp plate (27) to the lower in proper order, packing is pressed set (28) and is sealed packed (29), packing clamp plate (27) are connected with extension sleeve pipe (25) through slipknot bolt (30), packing clamp plate (27) are pressed on packing is pressed set (28), impel packing to press set (28) to press packing (29) and establish in packing chamber (26).

6. The ultra-low temperature double-flap hard seal stop valve of claim 5, characterized in that: the upper end of extension sleeve pipe (25) is equipped with installing support (31), and the inboard of installing support (31) is equipped with along axially extended guide rail (32), install on valve rod (3) and prevent changeing piece (33), prevent changeing and be equipped with guide slot (34) with guide rail (32) looks adaptation on the piece (33).

7. The ultra-low temperature double-flap hard seal stop valve of claim 6, characterized in that: prevent changeing piece (33) including two the same anti-rotation blocks (35) of shape, prevent being equipped with middle opening (36) and side opening (37) on changeing block (35), two prevent changeing block (35) and be connected through the screw to two prevent that middle opening (36) combination on changeing block (35) form and are used for the cover to establish socket (38) in valve rod (3) periphery, be equipped with cutting portion (39) that are used for agreeing with mutually with socket (38) inner wall on valve rod (3), two prevent changeing side opening (37) combination formation on block (35) guide slot (34).

8. The ultra-low temperature double-flap hard seal stop valve of claim 5, characterized in that: the water dripping disc (40) is welded on the lengthened sleeve (25).

9. The ultra-low temperature double-flap hard seal stop valve of claim 5, characterized in that: the lengthened sleeve (25) is uniformly provided with a plurality of annular heat dissipation grooves (41) along the radial direction.