CN113374875A - Stop valve suitable for high-temperature and high-pressure working condition - Google Patents
Stop valve suitable for high-temperature and high-pressure working condition Download PDFInfo
- Publication number
- CN113374875A CN113374875A CN202110635360.9A CN202110635360A CN113374875A CN 113374875 A CN113374875 A CN 113374875A CN 202110635360 A CN202110635360 A CN 202110635360A CN 113374875 A CN113374875 A CN 113374875A
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- Prior art keywords
- valve
- valve rod
- packing
- rod
- sleeve
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
- F16K1/04—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle with a cut-off member rigid with the spindle, e.g. main valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
Abstract
The invention discloses a stop valve suitable for high-temperature and high-pressure working conditions, which comprises a valve body, a packing box, a valve rod, a screw rod, a support, a spacer ring, a transition sleeve, a fastening sleeve, a packing compensation mechanism, a valve rod compensation mechanism and a heat insulation pad, wherein the heat insulation pad is arranged on the valve body; a stuffing box is arranged in the valve body, and a stuffing pad, stuffing and a spacer ring are arranged in the stuffing box; the valve rod is provided with a sealing surface which can be matched with the sealing surface of the valve body to realize a sealing function, the screw rod is arranged above the valve rod, the transition sleeve is connected with the valve rod and the screw rod, the fastening sleeve is tightly sleeved on the transition sleeve, the transition sleeve is provided with a flying wing, the valve body is provided with a bracket, the bracket is provided with a group of windows, and the windowing positions correspond to the flying wings of the transition sleeve; the packing compensation mechanism is connected with the packing box and comprises a packing pressing sleeve, a packing pressing plate, two groups of disc springs and two disc spring inverted rods; the valve rod compensation mechanism is connected with the valve rod and comprises a group of disc springs, a valve rod nut, a gland and two groups of bearings. The invention adopts a lightweight structural design and is provided with a thermal deformation compensation mechanism.
Description
Technical Field
The invention relates to a stop valve applicable to the field of nuclear power stations and applicable to high-temperature and high-pressure working conditions.
Background
Under the high-temperature and high-pressure working condition of the nuclear power station, the requirements on the action performance and the sealing performance of the stop valve are particularly high. Therefore, a shutoff valve with a self-sealing ring is often used in construction. The medium effort can compress tightly seal gasket in this structure, and the medium effort is big more, and the power that compresses tightly the gasket is big more, can realize the self sealss under the medium effort, guarantees the sealing performance of valve. However, the stop valve with the sealing ring has some defects: firstly, the size of a middle cavity of the stop valve with the high-pressure sealing ring is large, so that the whole weight of the valve is large, the deformation of a valve pressure-bearing main body is obvious under the working condition of high temperature and high pressure, and the safety is reduced; secondly, after the valve rod with the conventional structure is heated and expanded, the valve rod is easy to block when operated; thirdly, the filler is easy to be deformed in a stretching way in the process of medium temperature change, so that the pretightening force of the filler is changed, and the sealing performance of the filler is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a stop valve suitable for high-temperature and high-pressure working conditions, which is designed by adopting a lightweight structure and is provided with a thermal deformation compensation mechanism.
One technical scheme for achieving the above purpose is as follows: a stop valve suitable for high-temperature and high-pressure working conditions comprises a valve body, a packing box, a valve rod, a screw rod, a support, a spacer ring, a transition sleeve, a fastening sleeve, a packing compensation mechanism, a valve rod compensation mechanism and a heat insulation pad;
the valve body is internally provided with the stuffing box, and the stuffing box is internally provided with a stuffing pad, stuffing and the spacer ring;
the valve rod is provided with a sealing surface which can be matched with the sealing surface of the valve body to realize a sealing function, the screw rod is arranged above the valve rod, the transition sleeve is connected with the valve rod and the screw rod, the fastening sleeve is tightly sleeved on the transition sleeve, the transition sleeve is provided with a flying wing, the valve body is provided with the support, the support is provided with a group of windows, and the window opening position corresponds to the flying wing of the transition sleeve;
the packing compensation mechanism is connected with the packing box and comprises a packing pressing sleeve, a packing pressing plate, two groups of disc springs and two disc spring inverted rods;
the valve rod compensation mechanism is connected with the valve rod and comprises a group of disc springs, a valve rod nut, a gland and two groups of bearings.
Furthermore, the packing pad is provided with a sealing surface, and the sealing surface is matched with the inverted crown sealing surface on the valve rod to realize inverted sealing.
Furthermore, a groove with the same width and the same depth is respectively arranged on the contact surface of the spacer ring and the valve body stuffing box and the contact surface of the spacer ring and the valve rod, so that the width of the contact surface between the spacer ring and the valve body stuffing box and the valve rod is not more than 6 mm; the spacer ring is radially provided with at least 2 through holes which enable the inner diameter and the outer diameter of the spacer ring to be communicated.
Furthermore, the contact part of the screw rod and the valve rod is provided with a spherical contact structure, the side of the screw rod is spherical, and the side of the valve rod is a plane.
Furthermore, two milling flat parts are arranged at the contact part of the transition sleeve and the screw rod, and two flying wings which can extend into the bracket for opening the window are arranged on the transition sleeve.
Furthermore, a spherical contact structure is arranged at the contact position of the packing pressing plate and the packing pressing sleeve, the side of the packing pressing sleeve is a convex spherical surface, and the side of the packing pressing plate is a concave spherical surface; the disc spring is sleeved on the disc spring reversing rod, and then the disc spring reversing rod penetrates into the packing press plate mounting hole.
Furthermore, a group of bearings are respectively arranged on the upper part and the lower part of a shoulder of the valve rod nut, a group of disc springs are arranged on the upper part of the shoulder of the valve rod nut, and the valve rod nut and the bearings are tightly pressed in the support by the gland.
Furthermore, the valve body is provided with a step, the support is in contact with the upper part of the step of the valve body, the upper part of the step is not less than 5mm, and the heat insulation pad is in contact with the lower part of the step.
The invention aims to solve the problem that the functionality and the safety of the stop valve for the nuclear power station are reduced after stress deformation and thermal deformation occur under the high-temperature and high-pressure working condition, adopts the structural design of integrating the valve body and the packing box and sealing the valve body and the valve rod, cancels the middle flange structure of the traditional valve, has compact valve structure, small deformation of the pressure-bearing main body of the valve under high-temperature and high-pressure, reduces the probability of medium leakage, and improves the reliability and the safety of the valve.
The invention has the following three positive effects:
1. the invention solves the problem that the safety and functionality of the stop valve for the nuclear power station are reduced after stress deformation and thermal deformation occur under the high-temperature and high-pressure working condition.
2. The invention achieves the aim of reducing potential leakage points of the stop valve.
3. The invention realizes the purpose of compensating the deformation of the internal part of the stop valve under the working condition of high temperature and high pressure.
Drawings
FIG. 1 is a front sectional view of a stop valve suitable for high temperature and high pressure conditions according to the present invention;
FIG. 2 is an enlarged detail view of FIG. 1A;
FIG. 3 is an enlarged detail view of FIG. 1B;
FIG. 4 is an enlarged detail view of FIG. 1C;
FIG. 5 is a side semi-sectional view of a stop valve of the present invention adapted for high temperature and high pressure conditions;
FIG. 6 is an enlarged detail view of FIG. 5D;
fig. 7 is an enlarged view of the detail at bitmap 5E.
Detailed Description
Referring to fig. 1 to 7, in order to better understand the technical solution of the present invention, the following is described in detail by specific embodiments:
the invention discloses a stop valve suitable for high-temperature and high-pressure working conditions, which comprises a valve body 1, a packing box, a valve rod 2, a screw 8, a support 6, a spacer ring, a transition sleeve 7, a fastening sleeve 9, a packing compensation mechanism, a valve rod compensation mechanism and a heat insulation pad.
Referring to fig. 1 to 3, when a medium flows in a valve body 1, a function of connecting or blocking the medium is realized by lifting a valve rod 2. The valve rod 2 is an integrated valve rod, a sealing surface is arranged on the integrated valve rod, and the integrated valve rod is matched with the sealing surface on the valve body 1 to realize valve sealing. The screw 8 is disposed above the valve stem 2. The contact part of the screw 8 and the valve rod 2 is provided with a spherical contact structure, the screw side is spherical, and the valve rod side is a plane, so that the centering of the valve rod 2 can be adjusted.
Referring to fig. 1 and 3, the valve rod 2 is connected with the screw rod 8 through a transition sleeve 7, the transition sleeve 7 is locked through a fastening sleeve 9, and the transition sleeve is provided with a flying wing. The valve body 1 is provided with a bracket 6, the bracket 6 is provided with a group of windows, and the positions of the windows correspond to the fins of the transition sleeve. Two milling flat parts are arranged at the contact part of the transition sleeve 7 and the screw 8, and two flying wings of the transition sleeve 7 can extend into the support 6 to open the window, so that the rotation of the valve rod and the screw can be limited, and the rotation prevention function of the screw is realized.
Referring to fig. 1 and 4, a stuffing box is arranged in the valve body, and a stuffing pad 3, stuffing 4 and a spacer ring 5 are arranged in the stuffing box. The packing pad 3 is arranged at the lower part of the packing 4, and a sealing surface is arranged on the packing pad 3 and matched with the sealing surface at the inverted crown part of the valve rod 2, so that the inverted sealing function is realized. The middle part of the packing 4 is provided with a spacer ring 5, and the contact surfaces of the spacer ring 5 and the packing box and the contact surfaces of the spacer ring 5 and the valve rod 2 are respectively provided with a groove with the same width and the same depth, so that the widths of the contact surfaces between the spacer ring and the valve body packing box and the valve rod are not more than 6 mm; the spacer ring is radially provided with at least 2 through holes which enable the inner diameter and the outer diameter of the spacer ring to be communicated, so that the pressure inside and outside the spacer ring is balanced, and the self-sealing function is realized under the action of a medium.
Please refer to fig. 5 to 7. The packing compensation mechanism is connected with the packing box and comprises a packing pressing sleeve, a packing pressing plate 10, two groups of packing disc springs 11 and two disc spring inverted rods 12. The contact position of the packing pressing plate 10 and the packing pressing sleeve is provided with a spherical contact structure, the side of the packing pressing sleeve is a convex spherical surface, and the side of the packing pressing plate 10 is a concave spherical surface. The packing disc spring 11 is sleeved on the disc spring inverted rod 12, and then the disc spring inverted rod 12 penetrates into the mounting hole of the packing pressing plate 10. The packing disc spring 11 can compensate the deformation of the packing 4 in the working process, and the packing disc spring 11 is guided by the disc spring inverted rod 12 to ensure that the preloading process of the nut 13 and the stud 14 does not generate unbalance loading. The valve rod compensation mechanism is connected with the valve rod and comprises a group of valve rod disc springs 16, a valve rod nut 15, a gland and two groups of bearings. A set of bearings is respectively arranged on the upper part and the lower part of the shoulder of the valve rod nut 15, a set of valve rod disc springs 16 are arranged on the upper part of the shoulder of the valve rod nut 15, and the valve rod nut and the bearings are tightly pressed in the bracket by a gland. The stem disc spring 16 may compensate for the deformation of the valve stem 2 during operation.
The valve body is provided with a step, the support is in contact with the upper part of the step of the valve body, the upper part of the step is not less than 5mm, and the heat insulation pad is in contact with the lower part of the step.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. A stop valve suitable for high-temperature and high-pressure working conditions comprises a valve body, a packing box, a valve rod, a screw rod and a support, and is characterized by further comprising a spacer ring, a transition sleeve, a fastening sleeve, a packing compensation mechanism, a valve rod compensation mechanism and a heat insulation pad;
the valve body is internally provided with the stuffing box, and the stuffing box is internally provided with a stuffing pad, stuffing and the spacer ring;
the valve rod is provided with a sealing surface which can be matched with the sealing surface of the valve body to realize a sealing function, the screw rod is arranged above the valve rod, the transition sleeve is connected with the valve rod and the screw rod, the fastening sleeve is tightly sleeved on the transition sleeve, the transition sleeve is provided with a flying wing, the valve body is provided with the support, the support is provided with a group of windows, and the window opening position corresponds to the flying wing of the transition sleeve;
the packing compensation mechanism is connected with the packing box and comprises a packing pressing sleeve, a packing pressing plate, two groups of disc springs and two disc spring inverted rods;
the valve rod compensation mechanism is connected with the valve rod and comprises a group of disc springs, a valve rod nut, a gland and two groups of bearings.
2. The stop valve suitable for the high-temperature and high-pressure working condition is characterized in that the packing gasket is provided with a sealing surface which is matched with the inverted crown sealing surface on the valve rod to realize inverted sealing.
3. A stop valve suitable for high-temperature and high-pressure working conditions as claimed in claim 1, wherein a groove with the same width and the same depth is respectively arranged on the contact surface of the spacer ring and the valve body stuffing box and the contact surface of the spacer ring and the valve rod, so that the width of the contact surface between the spacer ring and the valve body stuffing box and the valve rod is not more than 6 mm; the spacer ring is radially provided with at least 2 through holes which enable the inner diameter and the outer diameter of the spacer ring to be communicated.
4. The stop valve suitable for the high-temperature and high-pressure working condition according to claim 1, wherein a spherical contact structure is arranged at a contact part of the screw rod and the valve rod, the screw rod side is spherical, and the valve rod side is a plane.
5. The stop valve suitable for the high-temperature and high-pressure working condition as claimed in claim 1, wherein two milling flats are arranged at the contact position of the transition sleeve and the screw, and two flying wings which can extend into the support to open the window are arranged on the transition sleeve.
6. The stop valve suitable for the high-temperature and high-pressure working condition according to claim 1, wherein a spherical contact structure is arranged at the contact position of the packing pressing plate and the packing pressing sleeve, the side of the packing pressing sleeve is a convex spherical surface, and the side of the packing pressing plate is a concave spherical surface; the disc spring is sleeved on the disc spring reversing rod, and then the disc spring reversing rod penetrates into the packing press plate mounting hole.
7. A stop valve suitable for high-temperature and high-pressure working conditions as claimed in claim 1, wherein a set of bearings is respectively arranged above and below the shoulder of the stem nut, a set of disc springs is arranged on the upper portion of the shoulder of the stem nut, and the stem nut and the bearings are tightly pressed in the support through the gland.
8. The stop valve suitable for the high-temperature and high-pressure working condition as claimed in claim 1, wherein the valve body is provided with a step, the support is in contact with the upper part of the step of the valve body, the upper part of the step is not less than 5mm, and the heat insulation pad is in contact with the lower part of the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635360.9A CN113374875A (en) | 2021-08-16 | 2021-08-16 | Stop valve suitable for high-temperature and high-pressure working condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110635360.9A CN113374875A (en) | 2021-08-16 | 2021-08-16 | Stop valve suitable for high-temperature and high-pressure working condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113374875A true CN113374875A (en) | 2021-09-10 |
Family
ID=77576336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110635360.9A Pending CN113374875A (en) | 2021-08-16 | 2021-08-16 | Stop valve suitable for high-temperature and high-pressure working condition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113374875A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701632A (en) * | 2009-11-27 | 2010-05-05 | 浙江万龙机械有限公司 | Bellows stop valve |
| CN204985756U (en) * | 2015-09-30 | 2016-01-20 | 江南阀门有限公司 | Stop valve of integral type valve rod |
| EP3067596A1 (en) * | 2015-03-10 | 2016-09-14 | OHL Gutermuth Industrial Valves GmbH | Double seat shut-off valve |
| CN205639642U (en) * | 2016-05-19 | 2016-10-12 | 南通国电电站阀门股份有限公司 | Sealed stop valve of electronic special high pressure ball of Y shape |
| CN206860899U (en) * | 2017-06-07 | 2018-01-09 | 江苏德康高中压阀门制造股份有限公司 | Plunger stop valve |
| CN207161860U (en) * | 2017-08-15 | 2018-03-30 | 西安广核阀门有限公司 | A kind of liquid metal special stop valve |
| CN109357021A (en) * | 2018-12-11 | 2019-02-19 | 广州市新彤和技术研究有限公司 | One kind can compensate pressing sleeve formula shut-off valve and method automatically |
| CN109424756A (en) * | 2017-08-23 | 2019-03-05 | 永嘉县信诚科技服务有限公司 | Self-sealing stop valve |
| CN209800751U (en) * | 2019-05-07 | 2019-12-17 | 广州市新彤和技术研究有限公司 | Ferrule press-sleeve type stop valve |
-
2021
- 2021-08-16 CN CN202110635360.9A patent/CN113374875A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701632A (en) * | 2009-11-27 | 2010-05-05 | 浙江万龙机械有限公司 | Bellows stop valve |
| EP3067596A1 (en) * | 2015-03-10 | 2016-09-14 | OHL Gutermuth Industrial Valves GmbH | Double seat shut-off valve |
| CN204985756U (en) * | 2015-09-30 | 2016-01-20 | 江南阀门有限公司 | Stop valve of integral type valve rod |
| CN205639642U (en) * | 2016-05-19 | 2016-10-12 | 南通国电电站阀门股份有限公司 | Sealed stop valve of electronic special high pressure ball of Y shape |
| CN206860899U (en) * | 2017-06-07 | 2018-01-09 | 江苏德康高中压阀门制造股份有限公司 | Plunger stop valve |
| CN207161860U (en) * | 2017-08-15 | 2018-03-30 | 西安广核阀门有限公司 | A kind of liquid metal special stop valve |
| CN109424756A (en) * | 2017-08-23 | 2019-03-05 | 永嘉县信诚科技服务有限公司 | Self-sealing stop valve |
| CN109357021A (en) * | 2018-12-11 | 2019-02-19 | 广州市新彤和技术研究有限公司 | One kind can compensate pressing sleeve formula shut-off valve and method automatically |
| CN209800751U (en) * | 2019-05-07 | 2019-12-17 | 广州市新彤和技术研究有限公司 | Ferrule press-sleeve type stop valve |
Non-Patent Citations (1)
| Title |
|---|
| 陆培文: "《实用阀门设计手册》", 31 May 2020 * |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210910 |