CN219911764U - High-temperature high-pressure corrosion-resistant manual stop valve - Google Patents
High-temperature high-pressure corrosion-resistant manual stop valve Download PDFInfo
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- CN219911764U CN219911764U CN202320670603.7U CN202320670603U CN219911764U CN 219911764 U CN219911764 U CN 219911764U CN 202320670603 U CN202320670603 U CN 202320670603U CN 219911764 U CN219911764 U CN 219911764U
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- 230000007797 corrosion Effects 0.000 title claims abstract description 17
- 238000005260 corrosion Methods 0.000 title claims abstract description 17
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 229910052751 metal Inorganic materials 0.000 claims abstract description 10
- 239000002184 metal Substances 0.000 claims abstract description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 9
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229910052755 nonmetal Inorganic materials 0.000 claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 125000003003 spiro group Chemical group 0.000 claims 1
- 230000002457 bidirectional effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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- Details Of Valves (AREA)
Abstract
The utility model discloses a high-temperature high-pressure corrosion-resistant manual stop valve, which comprises a valve body (16), wherein a high-pressure gas inlet (A) is formed in the bottom of the valve body (16), a cavity is formed in the upper portion of the valve body, a high-pressure gas outlet (B) is formed in the side portion of the valve body (16), a valve core (4) which is pushed by a screw rod (6) to move up and down is arranged in the cavity in the upper portion of the valve body (16), one end of the valve core (4) is in contact seal with a valve hole line, a sealing ring (14) with a metal-nonmetal-metal three-layer structure is arranged between the rod portion of the valve core (4) and the valve body (16), the valve core (4) and the cavity are in a bidirectional sealing structure, the sealing performance is good, the quality is reliable, and the service life of the sealing ring (14) is long.
Description
Technical Field
The utility model relates to a manual stop valve, in particular to a high-temperature high-pressure corrosion-resistant manual stop valve applicable to the temperature of more than 450 ℃.
Background
The shut-off valve, also called a shut-off valve, is one of the most widely used valves. By shut-off valve is meant a valve in which a closure member, such as a screw, moves along the centerline of the valve body. Depending on the form of movement of the screw, the valve seat port varies in direct proportion to the valve stem travel. The change of the valve body through opening is in a proportional relation with the stroke of the valve rod, so that the valve is very suitable for adjusting the flow. Thus, this type of valve is well suited for use as a shut-off or regulating valve. The manual stop valve is closed by rotating the screw rod by hands to generate pressure, so that the sealing surface of the screw rod is tightly attached to the sealing surface of the valve seat, and medium circulation is prevented. The manual stop valve is used in an ammonia gas environment and an acidic medium condition in a hot isostatic pressing environment, and needs to bear 150MPa pressure, 450 ℃ temperature and corrosion, and the conventional stop valve has the defects of quick failure and low service life due to long-time direct contact of a polytetrafluoroethylene sealing ring and high-temperature gas, so that the sealing structure of the manual stop valve in the high-temperature high-pressure and corrosion environment is guaranteed to be good in sealing performance and reliable in quality.
Disclosure of Invention
The utility model aims to provide the high-temperature high-pressure corrosion-resistant manual stop valve with a sealing structure, which has good sealing performance and reliable quality and is long in service life.
The utility model is realized by the following technical scheme: the utility model provides a high temperature high pressure corrosion-resistant manual stop valve, includes the valve body, the valve body bottom be equipped with high-pressure gas import A, valve body upper portion open and to have the cavity of intercommunication high-pressure gas import A, valve body lateral part be equipped with the intercommunication high-pressure gas export B of cavity, the cavity on valve body upper portion be provided with and promote the case that reciprocates through the screw rod, case one end with high-pressure gas import A's valve hole line contact seal, case pole portion with the valve body between set up the soft sealing of second grade, the soft sealing of second grade be the cover and be in the sealing washer of case pole portion, the sealing washer include nonmetal sealing washer and set up the retaining ring of two metals on the nonmetal sealing washer up and down both ends face.
Further, the upper part of the valve body is provided with a threaded hole communicated with the cavity, the threaded hole is in threaded connection with the lower end of the connector, the connector is internally provided with a through hole, the through hole is provided with an internal thread section, one end of the valve core penetrates through the through hole of the connector and is arranged in the cavity, one end of the valve core and the transition surface of the rod part are made into conical surfaces, and the bottom surface of the cavity is made into conical surfaces and forms line contact sealing with one end of the valve core and the transition surface of the rod part.
Further, the screw rod is sleeved on the valve core and is in threaded connection with the internal thread section of the joint through hole, one end of the screw rod is in contact with the step surface of the rod part of the valve core, and the distance of up-and-down movement of the valve core is smaller than the screw pitch of the screw rod.
Compared with the prior art, the high-temperature high-pressure corrosion-resistant manual stop valve has the following advantages:
the sealing reliability is improved. The screw rod rotates downwards to drive the valve core 4 to move downwards along the axial lead of the valve body, the conical surface sealing surface of the valve core props against the valve hole of the valve body, and the stop valve is closed to form ultrahigh pressure seal; when the screw rod rotates upwards, the high-pressure gas pressure pushes the valve core to move upwards along the axial lead of the valve body, the valve hole is opened, the high-pressure gas flows out, the stop valve is in an opened state, the two-stage soft sealing metal retainer ring enables the polytetrafluoroethylene sealing ring not to be in direct contact with high-temperature and high-pressure gas, the service life of the polytetrafluoroethylene sealing ring is prolonged, in addition, when the stop valve is opened in place, the valve core and the cavity form linear contact type sealing, and the bidirectional sealing structure of the valve core ensures the whole-course sealing in the closed state, the opening process and the opening in place state. And the linear contact type sealing mode among metals is utilized under the long-term opening state, so that the extrusion effect of high-pressure gas on the secondary soft sealing of the rear stage is avoided, the secondary soft sealing structure is protected, and the problem of sealing failure of the stop valve is solved. Therefore, the manual stop valve can be used for a long time at 450 ℃ and above.
The maintenance requirement of the sealing ring is reduced. The improved structure shortens the opening and closing distance of the valve core besides adopting bidirectional sealing, and only needs 0.75 circle in the screwing process, namely, the direct contact time of the polytetrafluoroethylene sealing ring and the high-temperature high-pressure gas is only about a few seconds, and compared with the contact time of the prior ten hours, the service life of the sealing ring is effectively prolonged.
Drawings
FIG. 1 is a schematic structural view of a high-temperature high-pressure corrosion-resistant manual stop valve of the utility model.
FIG. 2 is a schematic perspective view of a high temperature, high pressure, corrosion resistant manual shut off valve of the present utility model.
In the figure: 1. screw, 2, nut one, 3, nut two, 4, case, 5, handle, 6, screw, 7, coat nut, 8, back cap, 9, joint, 10, screw, 11, locking ring, 12, cushion block, 13, sealing sleeve, 14, sealing ring, 15, retainer ring, 16, valve body, 17, outer screw sleeve, 18, outer screw nut, 19, screw sleeve.
Detailed Description
The present utility model will be described in further detail with reference to examples, but embodiments of the present utility model are not limited thereto.
In the embodiment of the high-temperature high-pressure corrosion-resistant manual stop valve shown in fig. 1 and 2, the manual stop valve comprises a valve body 16, a high-pressure gas inlet A is arranged at the bottom of the valve body 16, a chamber communicated with the high-pressure gas inlet A is arranged at the upper part of the valve body 16, a high-pressure gas outlet B communicated with the chamber is arranged at the side part of the valve body 16, a valve core 4 which moves up and down under the pushing of a screw rod 6 is arranged in the chamber at the upper part of the valve body 16, one end of the valve core 4 is in line contact with a valve hole of the high-pressure gas inlet A for sealing, a secondary soft seal is arranged between the rod part of the valve core 4 and the valve body 16, the secondary soft seal is a sealing ring 14 sleeved on the rod part of the valve core 4, and the sealing ring 14 comprises a nonmetal sealing ring and two metal check rings 15 arranged on the upper end face and the lower end face of the nonmetal sealing ring.
The upper part of the valve body 16 is provided with a threaded hole communicated with the cavity, the threaded hole is in threaded connection with the lower end of the joint 9, the joint 9 is internally provided with a through hole, the through hole is provided with an internal thread section, one end of the valve core 4 penetrates through the through hole of the joint 9 and is arranged in the cavity, one end of the valve core 4 and a rod transition surface are made into conical surfaces, and the bottom surface of the cavity is made into conical surfaces and forms line contact sealing with one end of the valve core 4 and the rod transition surface. After the valve 4 is opened, a two-stage sealing mode is adopted, namely, the bottom surface of the cavity is in contact sealing with a first-stage metal wire formed at one end of the valve core 4, and a second-stage soft sealing formed by a metal-nonmetal-metal three-layer structure is adopted.
The screw rod 6 is sleeved on the valve core 4 and is in threaded connection with the internal thread section of the through hole of the joint 9, one end of the screw rod 6 is in contact with the stepped surface of the rod part of the valve core 4, and the distance of the upward and downward movement of the valve core 4 is smaller than the screw pitch of the screw rod 6.
The retainer ring 15 is in clearance fit with the valve core 4, and the maximum clearance amount at the fit position is 0.05mm. Therefore, the direct contact area of the high-temperature gas and the nonmetal sealing ring can be controlled, the nonmetal sealing ring generates radial deformation under the axial extrusion action, and the clearance is eliminated, so that the sealing purpose is achieved.
The retainer ring 15 is made of stainless steel, and the nonmetallic sealing ring is made of polytetrafluoroethylene.
The other end of the screw rod 6 is connected with the handle 5, the other end of the valve core 4 extends out of the other end of the screw rod 6 to be in threaded connection with the first nut 2 and the second nut 3, the other end of the valve core 4 is arranged in the handle 5, the external thread section at the upper end of the joint 9 is in threaded connection with the third nut 7 and the back cap 8, the lower end of the joint 9 is in contact with one end of the sealing sleeve 13 sleeved on the valve core 4, and the other end of the sealing sleeve 13 is in contact with the retainer ring 15 at the upper end face of the nonmetallic sealing ring.
The lower part of the valve body 16 is provided with a sinking threaded hole communicated with the cavity, the upper end of the outer threaded sleeve 17 is in threaded connection with the sinking threaded hole, the upper end of the outer threaded sleeve 17 is provided with the valve hole, the lower end face of the stepped shaft of the outer threaded sleeve 17 is in threaded connection with a threaded sleeve 19 forming a high-pressure gas inlet A, and an outer nut 18 is arranged in the threaded sleeve 19.
The handle 5 is radially provided with a threaded hole, a screw 1 is arranged in the threaded hole, and the end part of the screw 1 is contacted with the screw rod 6.
The handle 5 rotates to drive the screw rod 6 to rotate downwards, the screw rod 6 moves downwards to drive the valve core 4 to move downwards along the axial lead of the valve body 16, the conical surface sealing surface of the valve core 4 props against the valve hole of the valve body 16, and the stop valve is closed to form ultrahigh pressure seal; when the handle 5 rotates in the opposite direction, the screw rod 6 rotates upwards, the valve core 4 is pushed by high-pressure gas to move upwards along the axial lead of the valve body, the valve hole is opened, the high-pressure gas flows out of the outlet B, the stop valve is in an open state, the metal retainer ring 15 of the second-stage soft seal enables the polytetrafluoroethylene sealing ring not to be in direct contact with the high-pressure gas, the service life of the polytetrafluoroethylene sealing ring is prolonged, in addition, when the stop valve is opened in place, the valve core 4 and the cavity form linear contact type seal, and the bidirectional sealing structure of the valve core 4 ensures the whole-course seal in the stop state, the opening process and the opening in place state. And the linear contact type sealing mode among metals is utilized under the long-term opening state, so that the extrusion effect of high-pressure gas on the secondary soft sealing of the rear stage is avoided, the secondary soft sealing structure is protected, and the problem of sealing failure of the stop valve is solved. Therefore, the manual stop valve can be used for a long time at 450 ℃ and above.
The maintenance requirement of the sealing ring is reduced. The improved structure shortens the opening and closing distance of the valve core 4 besides adopting bidirectional sealing, and only needs 0.75 circle in the screwing process, namely, the direct contact time of the polytetrafluoroethylene sealing ring and the high-temperature high-pressure gas is only about a few seconds, and compared with the contact time of the prior ten hours, the service life of the sealing ring is effectively prolonged.
Claims (5)
1. The utility model provides a high temperature high pressure corrosion-resistant manual stop valve, includes valve body (16), valve body (16) bottom be equipped with high-pressure gas inlet (A), valve body (16) upper portion open and to have the cavity of intercommunication high-pressure gas inlet (A), valve body (16) lateral part be equipped with the intercommunication the high-pressure gas outlet (B) of cavity, the cavity on valve body (16) upper portion be provided with through screw rod (6) promotion valve core (4) that reciprocate, valve core (4) one end with the valve hole line contact seal of high-pressure gas inlet (A), its characterized in that: the valve is characterized in that a secondary soft seal is arranged between the rod part of the valve core (4) and the valve body (16), the secondary soft seal is a sealing ring (14) sleeved on the rod part of the valve core (4), and the sealing ring (14) comprises a non-metal sealing ring and two metal check rings (15) arranged on the upper end face and the lower end face of the non-metal sealing ring.
2. The high temperature, high pressure, corrosion resistant manual shut off valve of claim 1, wherein: the upper portion of valve body (16) open and to have the intercommunication the screw hole of cavity, screw hole and joint (9) lower extreme spiro union, joint (9) in open and to have the through-hole, the through-hole system have the internal thread section, case (4) one end follow the through-hole of joint (9) pass and arrange in the cavity in, case (4) one end and pole portion transitional surface make the conical surface, the cavity bottom surface make the conical surface and with case (4) one end and pole portion transitional surface form the line contact seal.
3. The high temperature, high pressure, corrosion resistant manual shut off valve of claim 2, wherein: the screw rod (6) is sleeved on the valve core (4) and is in threaded connection with the internal thread section of the through hole of the joint (9), one end of the screw rod (6) is in contact with the stepped surface of the rod part of the valve core (4), and the distance of the up-and-down movement of the valve core (4) is smaller than the screw pitch of the screw rod (6).
4. A high temperature, high pressure, corrosion resistant manual shut off valve as in claim 3 wherein: the retainer ring (15) is in clearance fit with the valve core (4), and the maximum clearance amount at the fit position is 0.05mm.
5. The high temperature, high pressure, corrosion resistant manual shut off valve of claim 4, wherein: the check ring (15) is made of stainless steel, and the nonmetallic sealing ring is made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670603.7U CN219911764U (en) | 2023-03-30 | 2023-03-30 | High-temperature high-pressure corrosion-resistant manual stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320670603.7U CN219911764U (en) | 2023-03-30 | 2023-03-30 | High-temperature high-pressure corrosion-resistant manual stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219911764U true CN219911764U (en) | 2023-10-27 |
Family
ID=88463153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320670603.7U Active CN219911764U (en) | 2023-03-30 | 2023-03-30 | High-temperature high-pressure corrosion-resistant manual stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219911764U (en) |
-
2023
- 2023-03-30 CN CN202320670603.7U patent/CN219911764U/en active Active
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