CN202274116U - Quick-change low-temperature single-seat control valve - Google Patents

Quick-change low-temperature single-seat control valve Download PDF

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Publication number
CN202274116U
CN202274116U CN2011204209484U CN201120420948U CN202274116U CN 202274116 U CN202274116 U CN 202274116U CN 2011204209484 U CN2011204209484 U CN 2011204209484U CN 201120420948 U CN201120420948 U CN 201120420948U CN 202274116 U CN202274116 U CN 202274116U
Authority
CN
China
Prior art keywords
valve
tube
valve rod
rod
ring
Prior art date
Application number
CN2011204209484U
Other languages
Chinese (zh)
Inventor
李晓宁
蒋永兵
王燕
Original Assignee
重庆川仪调节阀有限公司
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Filing date
Publication date
Application filed by 重庆川仪调节阀有限公司 filed Critical 重庆川仪调节阀有限公司
Priority to CN2011204209484U priority Critical patent/CN202274116U/en
Application granted granted Critical
Publication of CN202274116U publication Critical patent/CN202274116U/en

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Abstract

The utility model discloses a quick-change low-temperature single-seat control valve which comprises a valve body, a valve seat, a valve plug, a valve rod, a valve deck and a sealing packing, wherein the valve seat is fixed at the shutoff part of the valve body, the valve plug is arranged in the valve body, the valve rod extends to the interior of the valve body from the exterior of the valve body and is connected with the valve plug, the valve deck is sleeved on the valve rod and hermetically connected with the valve body, and the sealing packing for sealing is arranged between the valve deck and the valve rod; meanwhile, the quick-change low-temperature single-seat control valve also comprises a connecting pipe, a thread compression ring, a positioning ring, a sealing gasket, a guide ring and a corrugated pipe; the connecting pipe is connected with the valve body and the valve deck; the positioning ring is sleeved outside the valve rod, tightly pressed on the inner wall of the connecting pipe by virtue of the thread compression ring, and sealed by the sealing gasket; the guide ring is arranged between the valve rod and the valve body, and used for carrying out guidance on the valve rod; and the corrugated pipe is sleeved outside the valve rod, and hermetically connected with the valve rod and the positioning ring. The quick-change low-temperature single-seat control valve disclosed by the utility model has less leakage points; because a corrugated pipe sealing structure is adopted, the heat exchange in the valve body can be reduced, and the sealing packing is prevented from being contacted with a low-temperature medium, thereby effectively guaranteeing the sealing performance of the control valve; and the disassembly and assembly of the valve rod and the valve plug are easy, thereby facilitating the maintenance and replacement of the control valve.

Description

Quick replacable type low temperature single-seat adjusting valve
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of quick replacable type low temperature single-seat adjusting valve.
Background technique
Along with developing by leaps and bounds of industrial technology; The valve industry has been proposed stricter requirement; Especially to employed valve in the cryogenic media; Except satisfying the performance that general valve has, the more important thing is reliability, the flexibility of action and to some other specific (special) requirements of Subzero valve in the sealing of low-temperature condition lower valve.
Present domestic low temperature valve is mainly extended type bonnet structure, and filler directly contacts with cryogenic media, is prone to crystalline damage, and valve gap is long higher with the big power consumption of surrounding environment heat exchange amount.Valve gap adopts bolt to be connected with valve body, and the Sealing pad causes defective valve because of especially closely being prone to low temperature brittleness from cryogenic media, and the medium easy to leak when the maintenance valve, need be taken ice chest apart, and pulling down valve body could maintain and replace, very inconvenience.
Therefore, need that a kind of heat exchange is few, good airproof performance, easy-to-mount low temperature valve, reduce the difficulty of rate of fault and maintain and replace.
The model utility content
In view of this, the purpose of the utility model provides a kind of quick replacable type low temperature single-seat adjusting valve, has that heat exchange is few, good airproof performance, is convenient to superior function such as dismounting, and rate of fault is lower, for ease of maintenaince changes.
The quick replacable type low temperature single-seat adjusting valve of the utility model; Comprise valve body, valve seat, spool, valve rod, valve gap and stuffing box packing; Said valve seat is fixed in the valve body place of damming, and spool is arranged at valve inner, and valve rod is connected in spool in valve body is stretched in the outside; Valve gap is placed in outside the valve rod and is sealedly attached to valve body; Stuffing box packing is arranged between valve gap and the valve rod and seals, and also comprises connecting tube, threaded pressure ring, positioning ring, gasket seal, guide ring and bellows, and said connecting tube is connected in valve body and valve gap; Said positioning ring is placed in outside the valve rod and through said threaded pressure ring and presses in the connecting tube inwall, and corresponding positioning ring place is provided with the support platform terrace on the connecting tube; Said gasket seal is arranged between positioning ring and the support platform terrace and seals; Said guide ring is arranged between valve rod and the valve body and is used for valve rod is led; Said bellows is placed in the valve rod outside and is sealedly attached to valve rod and positioning ring, is positioned at valve rod and is provided with the baffle ring that is used to connect bellows.
Further; Said connecting tube fixedly is made up of connecting tube I and connecting tube II butt joint; The outer end of connecting tube I is connected in valve body, and the outer end of connecting tube II is connected in valve gap, and the internal diameter of connecting tube I is not less than internal diameter that is attached thereto part on the valve body and the internal diameter that is not more than connecting tube II; Be positioned at that connecting tube I goes up and connecting tube II connecting end inwall is provided with internal thread, said support platform terrace is arranged at the internal thread bottom;
Further, each joint all connects through welded seal between said connecting tube I, connecting tube II, the valve body and between the bellows, positioning ring, baffle ring, valve rod;
Further, said guide ring is fastenedly connected in valve rod and with the valve body single-degree-of-freedom through gland nut and is slidingly matched;
Further, be positioned at and also be provided with one on the valve gap perpendicular to valve gap axis and the tapped hole that communicates with the valve gap endoporus, tapped hole is sealed by plug screw.
The beneficial effect of the utility model is: quick replacable type low temperature single-seat adjusting valve valve body of the utility model and connecting tube are through being welded to connect; Reduced leakage point; Adopt the sylphon seal structure, can reduce the heat exchange in the valve body and prevent stuffing box packing contact cryogenic media, effectively guaranteed sealability; Valve rod and spool easy disassembling are convenient to maintain and replace.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is the structural representation of the utility model.
Embodiment
Fig. 1 is the structural representation of the utility model; As shown in the figure: the quick replacable type low temperature single-seat adjusting valve of present embodiment, comprise valve body 1, valve seat 2, spool 3, valve rod 4, valve gap 5 and stuffing box packing 6, said valve seat 2 is fixed in valve body 1 place of damming; Spool 3 is arranged at valve body 1 inside; Valve rod 4 is connected in spool 3 in valve body 1 is stretched in the outside, valve gap 5 is placed in outside the valve rod 4 and is sealedly attached to valve body 1, and stuffing box packing 6 is arranged at sealing between valve gap 5 and the valve rod 4; Also comprise connecting tube 7, positioning ring 15, threaded pressure ring 8, gasket seal 9, guide ring 10 and bellows 11, said connecting tube 7 is connected in valve body 1 and valve gap 5; Said positioning ring 15 is placed in outside the valve rod 4 and through said threaded pressure ring 8 and presses in connecting tube 7 inwalls, and corresponding positioning ring 9 places are provided with the support platform terrace on the connecting tube 7; Said gasket seal 9 is arranged between positioning ring 15 and the support platform terrace and seals; Said guide ring 10 is arranged between valve rod 4 and the valve body 1 and is used for valve rod 4 is led; Said bellows 11 is placed in valve rod 4 outsides and is sealedly attached to valve rod 4 and positioning ring 15, is positioned at valve rod 4 and is provided with the baffle ring 4a that is used to connect bellows 11.
In the present embodiment; Said connecting tube 7 fixedly is made up of connecting tube I 7a and connecting tube II7b butt joint, and the outer end of connecting tube I 7a is connected in valve body 1, and the outer end of connecting tube II7b is connected in valve gap 5; The internal diameter of connecting tube I 7a is not less than internal diameter that is attached thereto part on the valve body 1 and the internal diameter that is not more than connecting tube II7b; Be positioned on the connecting tube I 7a with connecting tube II7b connecting end inwall and be provided with internal thread, said support platform terrace is arranged at the internal thread bottom, threaded pressure ring 8 is tightened in the internal thread place positioning ring 15 and gasket seal 9 are pressed in the support platform terrace; Rational in infrastructure; Be convenient to dismounting, just can valve rod 4 and spool 3 be taken out by connecting tube 7 after valve gap 5 and threaded pressure ring 8 are removed, be convenient to maintain and replace.
In the present embodiment; Each joint all connects through welded seal between said connecting tube I 7a, connecting tube II7b, the valve body 1 and between the bellows 11, positioning ring 15, baffle ring 4a, valve rod 4; Leakage point is few, and structure stability is good, and bellows 11, positioning ring 15, baffle ring 4a, valve rod 4 are integrally formed structure; Can one pack into or take out, be convenient to maintain and replace.
In the present embodiment, said guide ring 10 is fastenedly connected in valve rod 4 and with valve body 1 single-degree-of-freedom through gland nut 12 and is slidingly matched, and is as shown in the figure; Valve rod 4 is through being threadedly connected to spool 3, and spool 3 is positioned at the valve rod 4 outside step surfaces that form, and elder generation is with gland nut 12 precession valve rods 4 during assembling; Then guide ring 10 is inserted in valve rod 4; Valve rod 4 precession spools 3, the back guide ring 10 of screwing presses in spool 3 fixing through gland nut 12 again, and structure is compact, firm.
In the present embodiment; Be positioned at and also be provided with one on the valve gap 5 perpendicular to valve gap 5 axis and the tapped hole 13 that communicates with valve gap 5 endoporus; Tapped hole 13 is by plug screw 14 sealings; Be positioned at tapped hole 13 places after plug screw 14 removed and connect a pressure gauge connecting tube 7 inside, the pressure of bellows 11 or more are intuitively shown, and then whether the sealing at judgement bellows 11 places is intact.
Explanation is at last; Above embodiment is only unrestricted in order to the technological scheme of explanation the utility model; Although with reference to preferred embodiment the utility model is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement the technological scheme of the utility model; And not breaking away from the aim and the scope of the utility model technological scheme, it all should be encompassed in the middle of the claim scope of the utility model.

Claims (5)

1. quick replacable type low temperature single-seat adjusting valve; Comprise valve body, valve seat, spool, valve rod, valve gap and stuffing box packing; Said valve seat is fixed in the valve body place of damming, and spool is arranged at valve inner, and valve rod is connected in spool in valve body is stretched in the outside; Valve gap is placed in outside the valve rod and is sealedly attached to valve body; Stuffing box packing is arranged between valve gap and the valve rod and seals, and it is characterized in that: also comprise connecting tube, threaded pressure ring, positioning ring, gasket seal, guide ring and bellows, said connecting tube is connected in valve body and valve gap; Said positioning ring is placed in outside the valve rod and through said threaded pressure ring and presses in the connecting tube inwall, and corresponding positioning ring place is provided with the support platform terrace on the connecting tube; Said gasket seal is arranged between positioning ring and the support platform terrace and seals; Said guide ring is arranged between valve rod and the valve body and is used for valve rod is led; Said bellows is placed in the valve rod outside and is sealedly attached to valve rod and positioning ring, is positioned at valve rod and is provided with the baffle ring that is used to connect bellows.
2. quick replacable type low temperature single-seat adjusting valve according to claim 1; It is characterized in that: said connecting tube fixedly is made up of connecting tube I and connecting tube II butt joint; The outer end of connecting tube I is connected in valve body, and the outer end of connecting tube II is connected in valve gap, and the internal diameter of connecting tube I is not less than internal diameter that is attached thereto part on the valve body and the internal diameter that is not more than connecting tube II; Be positioned at that connecting tube I goes up and connecting tube II connecting end inwall is provided with internal thread, said support platform terrace is arranged at the internal thread bottom.
3. quick replacable type low temperature single-seat adjusting valve according to claim 2 is characterized in that: each joint all connects through welded seal between said connecting tube I, connecting tube II, the valve body and between the bellows, positioning ring, baffle ring, valve rod.
4. quick replacable type low temperature single-seat adjusting valve according to claim 3 is characterized in that: said guide ring is fastenedly connected in valve rod and with the valve body single-degree-of-freedom through gland nut and is slidingly matched.
5. quick replacable type low temperature single-seat adjusting valve according to claim 4 is characterized in that: be positioned at and also be provided with one on the valve gap perpendicular to valve gap axis and the tapped hole that communicates with the valve gap endoporus, tapped hole is sealed by plug screw.
CN2011204209484U 2011-10-29 2011-10-29 Quick-change low-temperature single-seat control valve CN202274116U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204209484U CN202274116U (en) 2011-10-29 2011-10-29 Quick-change low-temperature single-seat control valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011204209484U CN202274116U (en) 2011-10-29 2011-10-29 Quick-change low-temperature single-seat control valve

Publications (1)

Publication Number Publication Date
CN202274116U true CN202274116U (en) 2012-06-13

Family

ID=46194477

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011204209484U CN202274116U (en) 2011-10-29 2011-10-29 Quick-change low-temperature single-seat control valve

Country Status (1)

Country Link
CN (1) CN202274116U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927295A (en) * 2012-11-10 2013-02-13 无锡智能自控工程股份有限公司 Conduction oil heat tracing clamping sleeve angle valve
CN103821948A (en) * 2014-02-25 2014-05-28 杭州杭氧工装泵阀有限公司 Bellows seal valve
CN104100767A (en) * 2014-07-25 2014-10-15 上海共和真空技术有限公司 Aseptic isolating device for valve rod of main valve in freeze dryer and online leakage detection device thereof
CN106439060A (en) * 2016-12-30 2017-02-22 华北水利水电大学 Integrated low-temperature aluminum angle valve

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927295A (en) * 2012-11-10 2013-02-13 无锡智能自控工程股份有限公司 Conduction oil heat tracing clamping sleeve angle valve
CN103821948A (en) * 2014-02-25 2014-05-28 杭州杭氧工装泵阀有限公司 Bellows seal valve
CN104100767A (en) * 2014-07-25 2014-10-15 上海共和真空技术有限公司 Aseptic isolating device for valve rod of main valve in freeze dryer and online leakage detection device thereof
CN106439060A (en) * 2016-12-30 2017-02-22 华北水利水电大学 Integrated low-temperature aluminum angle valve
CN106439060B (en) * 2016-12-30 2018-09-18 华北水利水电大学 Integral type low temperature aluminum angle valve

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