CN213776478U

CN213776478U - High-temperature stop check valve

Info

Publication number: CN213776478U
Application number: CN202022913513.5U
Authority: CN
Inventors: 管瑞
Original assignee: Telimax Fluid Technology Suzhou Co ltd
Current assignee: Telimax Fluid Technology Suzhou Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-23
Anticipated expiration: 2030-12-08

Abstract

The utility model relates to a high temperature stop check valve, which is applied in the technical field of valves and solves the problem that the valve core can deviate from the center when being closed, thereby causing the realization of strict sealing and further influencing the normal work of the valve, comprising a Y-shaped valve body, a medium inlet channel, a medium outlet channel and an internal part installation channel are arranged in the valve body, a valve seat is arranged at the liquid outlet end of the medium outlet channel, a valve core and a valve rod are arranged in the internal part installation channel, the outer edge diameter of the valve core is smaller than the inner edge diameter of the internal part installation channel, a guiding counter bore is arranged on the other end surface of the valve core, one end of the valve rod is sleeved in the guiding counter bore, the outlet end of the internal part installation channel is provided with a valve cover with a connecting hole, the other end of the valve rod penetrates through the valve cover with the connecting hole, a step hole is arranged in the connecting hole of the valve cover, a positioning shaft sleeve is arranged in the step hole, and sealing filler is arranged between the valve rod and the step hole, a pressure plate is arranged on the valve cover; the high-temperature-resistant sealing device has the effects of preventing high-temperature blockage and realizing tight sealing.

Description

High-temperature stop check valve

Technical Field

The utility model discloses use in valve technical field, especially relate to a high temperature stop check valve.

Background

The stop valve is a common valve in the market, has high market utilization rate, low manufacturing cost and single technology, is most common in the market at present and has a large caliber and a low pound level, or a small-caliber high-pound stop valve, a general large-caliber cast steel stop valve and a small-caliber forged steel stop valve are common, however, as for the isolation valve for main steam of a power plant, a large-caliber high-pound-grade forged steel stop valve is generally adopted, but the clearance between the valve core and the valve body in the stop valve is small, the valve body and the valve core both generate micro-expansion under the condition of high temperature, at the moment, the valve core is easy to be blocked between the valve bodies, usually, in order to solve the blocking problem, a gap between the valve core and the valve body is enlarged, however, when the valve operates, the valve core is easy to shake in the valve body under the driving of the valve rod, so that the valve core can deviate from the center when being closed, so that strict sealing cannot be realized, and the normal operation of the valve is further influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high temperature stop check valve has solved the case and has easily taken place to rock in the valve body is inside under the drive of valve rod to lead to the case can skew center lead to unable realization strictly sealed when closed, influence the problem of the normal work of valve.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides a high temperature stop check valve, including the valve body of Y shape, be provided with medium inlet channel, medium outlet channel and internals installation passageway in the valve body, medium inlet channel, medium outlet channel and internals installation passageway intercommunication set up and form the Y shape passageway, the liquid outlet end of medium outlet channel is provided with the disk seat, be provided with case and valve rod in the internals installation passageway, the outer fringe diameter of case is less than the inner edge diameter of internals installation passageway, the disk seat cooperatees with one end face of case and forms sealed pair, be provided with the direction counter bore on the other end face of case, a pot head of valve rod is established in the direction counter bore, the exit end of internals installation passageway is provided with the valve gap that has the connecting hole, the other end of valve rod runs through the valve gap that has the connecting hole, the inside of valve gap connecting hole is provided with the step hole, the valve core is arranged in the valve body, the valve core is arranged in the valve core, and the valve core is arranged in the valve core.

Furthermore, a valve core guide sleeve is arranged inside the guide counter bore, the valve core guide sleeve is sleeved on the valve rod, an annular clamping groove is formed in one end, far away from the valve core, of the guide counter bore along the circumferential direction of the end, and a clamping ring used for preventing the valve core guide sleeve from falling off is arranged in the annular clamping groove.

Furthermore, a plurality of fixing holes are formed in the pressing plate, threaded holes which correspond to the plurality of fixing holes one to one are formed in the end face, away from the valve core, of the valve cover, studs are arranged in the plurality of fixing holes, one ends of the studs are in threaded connection with the threaded holes, and fastening nuts are in threaded fit with the other ends of the studs.

Further, a packing pressing sleeve for extruding the sealing packing is arranged between the sealing packing and the pressing plate.

Further, the sealing filler is made of graphite.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses a high temperature stop check valve, through increasing the clearance between case and the valve body, the case that takes place the micro-expansion under the high temperature effect can not contact with the valve body together, therefore when high temperature stop check valve worked, the dead phenomenon of card can not appear between case and the valve body, and then guaranteed the normal work of high temperature stop check valve;

furthermore, a positioning shaft sleeve arranged in the valve cover supports and positions the valve rod, when the valve rod works, the axis of the valve rod and the axis of the internal part installation channel are always in the same straight line, and a valve core connected to one end of the valve rod is tightly abutted against the valve seat under the supporting and positioning action of the valve rod, so that tight sealing is realized;

furthermore, the valve core guide sleeve arranged in the second annular groove is sleeved on the valve rod, the valve core guide sleeve plays a role in wear resistance, the contact surface between the guide counter bore and the valve rod is protected, the abrasion of the guide counter bore and the valve rod is reduced, the positioning precision of the valve core is improved, and the tightness of the high-temperature stop check valve is further improved.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic view of the overall structure in the embodiment of the present invention;

FIG. 2 is an enlarged view at A in FIG. 1;

fig. 3 is a schematic structural diagram of the valve core and the guiding counter bore in the embodiment of the present invention.

Wherein the reference numerals are as follows:

1. a valve body; 2. a media inlet channel; 3. a media outlet passage; 4. an internal piece mounting channel; 5. a valve seat; 6. a valve core; 7. a valve stem; 8. a guiding counter bore; 9. connecting holes; 10. a valve cover; 11. a stepped bore; 12. positioning the shaft sleeve; 13. sealing and filling; 14. pressing a plate; 16. a valve core guide sleeve; 17. pressing and sleeving the filler; 18. a snap ring; 19. a fixing hole; 20. a threaded hole; 21. a stud; 22. and (5) tightening the nut.

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 some, but not all embodiments of the present invention. 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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, for the utility model provides a high temperature stop check valve, including the valve body 1 of Y-shape, be provided with medium inlet channel 2 in the valve body 1, medium outlet channel 3 and internals installation passageway 4, medium inlet channel 2, medium outlet channel 3 and internals installation passageway 4 intercommunication set up and form the Y-shaped passageway, the liquid outlet end of medium outlet channel 3 is provided with valve seat 5, be provided with case 6 and valve rod 7 in the internals installation passageway 4, valve seat 5 cooperatees with a terminal surface of case 6 and forms the sealing pair, when high temperature stop check valve is out of work, case 6 and valve seat 5 are in close conflict together, the state that this moment high temperature stop check valve is in the closed state, guaranteed high temperature stop check valve's leakproofness, wherein, the outer fringe diameter of case 6 is less than the inner edge diameter of internals installation passageway 4, when high temperature stop check valve works under high temperature state, the valve body 1 and the valve core 6 are slightly expanded, and at the moment, because the clearance between the valve core 6 and the valve body 1 is larger, the expanded valve core 6 cannot be contacted with the expanded valve body 1 during working, so that the valve core 6 and the valve body 1 cannot be stuck during the working of the high-temperature stop check valve, and the normal working of the high-temperature stop check valve under the high-temperature condition is further ensured; the other end face of the valve core 6 is provided with a guiding counter bore 8, one end of the valve rod 7 is sleeved in the guiding counter bore 8, the outlet end of the internal part installation channel 4 is provided with a valve cover 10 with a connecting hole 9, the other end of the valve rod 7 penetrates through the valve cover 10 with the connecting hole 9, and the valve rod 7 drives the valve core 6 to move in the internal part installation channel 4 under the action of an external actuator (the actuator is a power source for moving the valve rod), so that the opening and closing of the high-temperature stop check valve are realized; the valve cover 10 is provided with a stepped hole 11 inside a connecting hole 9, the stepped hole 11 is internally provided with a positioning shaft sleeve 12 for positioning the valve rod 7, the valve rod 7 is supported and positioned through the positioning shaft sleeve 12, the valve rod 7 enables the axis of the valve rod and the axis of the internal part installation channel 4 to be always in the same straight line when in work, the valve core 6 connected to one end of the valve rod 7 is tightly butted with the valve seat 5 under the supporting and positioning effects of the valve rod 7 to realize tight sealing, wherein the positioning shaft sleeve 12 is made of Stellite6 alloy material (Stellite 6 alloy is cobalt-based alloy), the surface of the positioning shaft sleeve 12 is subjected to hard surface treatment, the service life of the positioning shaft sleeve 12 is prolonged, and the compressive strength of the positioning shaft sleeve is increased. The sealing packing 13 is arranged in the packing box (the packing box is a packing containing position) above the positioning shaft sleeve 12, the sealing packing 13 is arranged above the positioning shaft sleeve 12, the sealing packing 13 ensures the sealing performance of the valve rod 7 and the valve cover 10, the sealing packing 13 is made of graphite, the graphite sealing packing 13 is good in self-lubricating property, high in resilience coefficient and high in graphite purity, does not need to be subjected to anti-corrosion treatment, can withstand severe alternating temperature and pressure, and is ideal packing for valves and various dynamic and static seals. One end of the valve cover 10, which is far away from the valve core 6, is provided with a pressing plate 14 for fixing the sealing filler 13, the pressing plate 14 is sleeved on the valve rod 7, the pressing plate 14 is detachably connected with the valve cover 10, and the sealing filler 13 is fixed in the stepped hole 11 through the pressing plate 14 to prevent the sealing filler 13 from falling off.

Further, referring to fig. 1 and 3, after a medium is introduced into the high temperature stop check valve, under the action of medium impact, the valve element 6 connected to one end of the valve rod 7 slides along the axial direction of the valve rod 7 under the guiding action of the guiding counter bore 8, the inner wall of the guiding counter bore 8 and the valve rod 7 rub against each other, after the high temperature stop check valve works for a long time, the inner wall of the guiding counter bore 8 is worn under the action of friction force and the diameter of the inner edge of the guiding counter bore 8 gradually increases, at this time, the gap between the guiding counter bore 8 and the valve rod 7 is large, in the process that the valve rod 7 drives the guiding counter bore 8 to move, at this time, when the high temperature stop check valve is closed, the valve element 6 is deviated when in contact with the valve seat 5, the tightness of the high temperature stop check valve is poor, even a leakage phenomenon occurs, so that a valve element guide sleeve 16 is arranged inside the guiding counter bore 8, the valve core guide sleeve 16 is sleeved on the valve rod 7, and the valve core guide sleeve 16 plays a wear-resistant role, protects the mutual contact surface of the guide counter bore 8 and the valve rod 7, reduces the wear of the guide counter bore 8 and the valve rod 7, improves the positioning precision of the valve core 6, and further improves the tightness of the high-temperature stop check valve; an annular clamping groove 17 is formed in the inner wall of the guide counter bore 8 and far away from one end of the valve core 6 along the circumferential direction of the valve core, a clamping ring 18 used for preventing the valve core 6 from falling off is arranged in the annular clamping groove 17, the clamping ring 18 has elasticity, and the valve core guide sleeve 16 is firmly fixed in the guide counter bore 8 through the clamping ring 18.

Further, referring to fig. 1 and 2, a plurality of fixing holes 19 are formed in the pressure plate 14, threaded holes 20 corresponding to the plurality of fixing holes 19 one to one are formed in an end face, away from the valve core 6, of the valve cover 10, stud bolts 21 are arranged in the plurality of fixing holes 19, one ends of the stud bolts 21 are in threaded connection with the threaded holes 20, fastening nuts 22 are in threaded fit with the other ends of the stud bolts 21, fixing of a worker on the pressure plate 14 is facilitated through the stud bolts 21, the worker can detach the pressure plate 14 conveniently, a packing pressing sleeve 17 used for extruding the packing 13 is arranged between the packing 13 and the pressure plate 14, the packing 13 is further extruded and fixed through the packing pressing sleeve 17, and the packing 13 is firmly fixed in the stepped hole 11.

In summary, the following steps: by increasing the clearance between the valve core 6 and the valve body 1, the valve core 6 and the valve body 1 which are slightly expanded under the action of high temperature can not be contacted together, therefore, when the high temperature stop check valve works, the phenomenon of blocking can not occur between the valve core 6 and the valve body 1, and the normal work of the high temperature stop check valve is further ensured, the positioning shaft sleeve 12 arranged in the valve cover 10 supports and positions the valve rod 7, the axial line of the valve rod 7 and the axial line of the internal part installation channel 4 are always in the same straight line when in work, the valve core 6 connected with one end of the valve rod 7 is tightly abutted with the valve seat 5 under the supporting and positioning action of the valve rod 7, thereby realizing tight sealing, the valve core guide sleeve 16 arranged on the guide counter bore 8 is sleeved on the valve rod 7, the valve core guide sleeve 16 plays a wear-resistant role, protects the mutual contact surface of the guide counter bore 8 and the valve rod 7, and reduces the wear of the guide counter bore 8 and the valve rod 7, the positioning precision of the valve core 6 is improved, and the tightness of the high-temperature stop check valve is further improved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A high-temperature stop check valve is characterized by comprising a Y-shaped valve body, wherein a medium inlet channel, a medium outlet channel and an internal part installation channel are arranged in the valve body, the medium inlet channel, the medium outlet channel and the internal part installation channel are communicated and arranged to form the Y-shaped channel, a valve seat is arranged at a liquid outlet end of the medium outlet channel, a valve core and a valve rod are arranged in the internal part installation channel, the diameter of the outer edge of the valve core is smaller than the diameter of the inner edge of the internal part installation channel, the valve seat is matched with one end face of the valve core to form a sealing pair, a guide counter bore is arranged on the other end face of the valve core, one end of the valve rod is sleeved in the guide counter bore, a valve cover with a connecting hole is arranged at the outlet end of the internal part installation channel, the other end of the valve rod penetrates through the valve cover with the connecting hole, a step hole is arranged in the valve cover connecting hole, the valve core is arranged in the valve body, the valve core is arranged in the valve core, and the valve core is arranged in the valve core.

2. The high-temperature stop check valve according to claim 1, wherein a valve core guide sleeve is arranged inside the guide counter bore, the valve core guide sleeve is sleeved on the valve rod, an annular clamping groove is arranged inside one end of the guide counter bore, which is far away from the valve core, along the circumferential direction of the end, and a clamping ring for preventing the valve core guide sleeve from falling off is arranged inside the annular clamping groove.

3. The high-temperature stop check valve according to claim 1 or 2, wherein a plurality of fixing holes are formed in the pressure plate, threaded holes corresponding to the fixing holes in a one-to-one manner are formed in an end surface of the valve cover, which is away from the valve core, a stud is arranged in each of the fixing holes, one end of the stud is in threaded connection with the threaded hole, and a fastening nut is in threaded fit with the other end of the stud.

4. The high temperature cutoff check valve of claim 3 wherein a packing press sleeve for pressing the packing is disposed between the packing and the pressure plate.

5. The high temperature stop check valve of claim 4 wherein the packing material is graphite.