CN205047860U - A two valves for high temperature high pressure pipeline - Google Patents
A two valves for high temperature high pressure pipeline Download PDFInfo
- Publication number
- CN205047860U CN205047860U CN201520789918.9U CN201520789918U CN205047860U CN 205047860 U CN205047860 U CN 205047860U CN 201520789918 U CN201520789918 U CN 201520789918U CN 205047860 U CN205047860 U CN 205047860U
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- valve
- spool
- valve rod
- cavity
- seat
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Abstract
The utility model discloses a two valves for high temperature high pressure pipeline, it realizes through two cases that the second grade is sealed. The utility model discloses first disk seat is installed with the terminal cohesive position of entry to well cavity inner wall, and the second disk seat is installed to the cavity inner wall of first disk seat top, the export end is located second disk seat top, still contain second case and first case, the bottom fixed connection of first case and interior valve rod, the bottom fixed connection of second case and outer valve rod, interior valve rod slidable mounting is outside in the valve rod, outer valve rod top is provided with the dish spring abutment, and the dish spring abutment contains the vertical pole that is used for stretching into in the outer valve rod and touches with internal valve peak of the staff termination, the flange of vertical peak of the staff end for lieing in the outside just radial dimension of outer valve rod and being greater than the valve rod, the cover is equipped with the dish spring that radial dimension is greater than interior valve rod and less than or equal to flange on the vertical pole, the inside still equipment of cavity has the screw rod with the top contact of dish spring abutment flange, and the screw rod passes through handle driving and removes along axial direction.
Description
Technical field
The utility model relates to a kind of high-temperature and pressure pipeline valve, specifically for being assembled on the pipeline of conveying high-temperature high-pressure medium, realizes the break-make of pipeline.
Background technique
Valve on the existing pipeline for carrying high-temperature high-pressure medium comprises valve body, and valve body both sides offer medium pipeline entrance and medium pipeline outlet respectively; Medium pipeline entrance is positioned at the end that the end of valve inner and medium pipeline outlet be positioned at valve inner and is respectively access end and outlet ends; The cavity connects that access end and outlet ends and valve body center vertical direction are offered;
In order to the connected sum realizing medium pipeline entrance and medium pipeline outlet cuts off, current valve is primary seal, and namely the circulation passage between medium pipeline entrance and medium pipeline outlet is closed or cut off to dependence spool; For high-temperature high-pressure medium pipeline, this valve needs to realize closing reliably and cutting-off process by increasing craft precision, material quality and sealing material grade, and its cost is very high, and reliability is also lower simultaneously.
Model utility content
Technical problem to be solved in the utility model is, for above-mentioned deficiency of the prior art, to provide a kind of Double-seal valve for high-temperature and pressure pipeline, and it realizes secondary seal by two spools, seals reliable and is easy to realize.
In order to achieve the above object, the utility model is achieved by the following technical solutions:
For the Double-seal valve of high-temperature and pressure pipeline, comprise valve body, valve body both sides offer medium pipeline entrance and medium pipeline outlet respectively; Medium pipeline entrance is positioned at the end that the end of valve inner and medium pipeline outlet be positioned at valve inner and is respectively access end and outlet ends; The cavity connects that access end and outlet ends and valve body center vertical direction are offered; It is characterized in that:
The cohesive position of described cavity inner wall and access end is provided with the first valve seat, and the cavity inner wall above the first valve seat is provided with the second valve seat; Described outlet ends is positioned at above the second valve seat;
Also comprise the second spool for sealing the second valve seat and the first spool for sealing the first valve seat; First spool is fixedly connected with the bottom of inner valve stem; Second spool is fixedly connected with the bottom of outer valve rod; Inner valve stem is slidably installed outside in valve rod;
Described outer valve stem tip is provided with disc spring seat, disc spring seat comprise for stretch in outer valve rod and with the vertical bar of inner valve stem tip contact, vertical masthead end is be positioned at outer stem exterior and radial dimension is greater than the flange of inner valve stem; Described vertical bar is set with radial dimension and is greater than inner valve stem and the disc spring being less than or equal to flange;
Described cavity inside is also assembled with the screw rod with the tip contact of disc spring seat flange, and described screw rod is axially moved by lever drive.
Preferred implementation of the present utility model and further improvement as follows:
(1) also valve core housing is provided with between described outer valve rod and cavity inner wall; Valve core housing bottom is assembled in the second valve seat top; Described first spool and the second spool slide along valve core housing inwall; Described outer valve stem tip extends to above valve core housing;
Described outer valve stem tip arranges valve rod connecting sleeve; Described valve rod connecting sleeve top arranges groove, the radial edges of described disc spring seat and the sliding contact of groove cell wall; Described cavity inner wall, and the position be positioned at above valve rod connecting sleeve is provided with the chock along cavity radial protrusion.
Further: the top groove inner wall of described valve rod connecting sleeve is provided with connecting sleeve upper plate.
Further: described screw rod is trapezoidal thread bar; The cavity of described valve body is assembled with bearing on the inwall on top, and bearing inner race is fixedly connected with copper nut, and the top engagement of described screw rod is arranged in copper nut; Copper nut top extends to more than valve body top, and the top of copper nut fixedly mounts described handle.
Further: described valve body comprises the upper valve body and lower valve body that are connected by fastener assembly; Described fastener assembly comprises screw bolt and nut; Described valve core housing extends to the cavity of upper valve body via the cavity of lower valve body; Described first spool and inner valve stem one-body molded, described second spool and outer valve-stem integrated shaping.
Further: between described first valve seat and the second valve seat, be provided with lower seal metal gasket, the outer surface of described valve core housing is provided with the boss embedding cavity inner wall, and the cooperation position of this boss and cavity inner wall is provided with sealing metal pad; Described valve core housing is provided with the seal boss along valve core housing radial protrusion near the position on top, and be filled with a sealing between valve core housing open top and seal boss filler; The position outer valve rod being positioned at valve core housing top is provided with filler pressing sleeve, on outer valve rod, is provided with hold-down grid above filler pressing sleeve.
Further: described upper sealing metal pad and lower seal metal gasket are metal wound gasket; Described stuffing box packing is graphite and/or establishment filler.
Further: blind hole is offered on the top of described disc spring seat, the opening of blind hole extends internally making block, and described screw rod offers a circle groove near the position of bottom, and the block of described blind hole embeds in groove.
(2) described disc spring is multiple belleville springs axially superposed along the vertical bar of disc spring seat.
(3) described medium pipeline entrance and medium pipeline export the internal thread offered for connecting media pipeline;
The center of described first valve seat and the second valve seat is the MEDIA FLOW through hole overlapped with the cavity of valve body; Described first spool is cylindrical shape, and described second spool is inverted pyramidal structures.
The utility model beneficial effect is:
The disclosed Double-seal valve for high-temperature and pressure pipeline of the utility model, be provided with the first valve seat at the cohesive position of cavity inner wall and access end, the cavity inner wall above the first valve seat is provided with the second valve seat; Also comprise the second spool for sealing the second valve seat and the first spool for sealing the first valve seat; Thus, twice (secondary) sealing can be realized by the cooperation of two spools and two valve seats, the successful of twice sealing due to once sealing, and owing to being twice sealing, conventional manufacturing process can realize the sealing effect of high-reliability, is easy to realize;
In the utility model, the first spool is fixedly connected with the bottom of inner valve stem; Second spool is fixedly connected with the bottom of outer valve rod; Inner valve stem is slidably installed outside in valve rod; Moving up and down of two spools can move up and down realization by two valve rods, and two valve rods are mutual sheathing structure, very save space;
In the utility model, outer valve stem tip is provided with disc spring seat, disc spring seat comprise for stretch in outer valve rod and with the vertical bar of inner valve stem tip contact, vertical masthead end is be positioned at outer stem exterior and radial dimension is greater than the flange of inner valve stem; Described vertical bar is set with radial dimension and is greater than inner valve stem and the disc spring being less than or equal to flange; Disc spring seat is pressed in the process of disc spring in opposite directions, can, when pressing down at the beginning, allow outer valve rod first decline, the second spool and the second valve seat is made to seal combination in advance, follow-up continuation presses down, and the first spool is suppressed the sealing station of the first valve seat by the inner valve stem at center fast, realizes secondary seal; Because disc spring possesses extraordinary bearing load ability, very reliable under being therefore used in the conveying environment of High Temperature High Pressure, the order that simultaneously can also realize two spools when disc spring return reliably departs from; Finally achieve conducting and the cut-out of medium pipeline entrance and medium pipeline outlet;
The utility model is also assembled with the screw rod with the tip contact of disc spring seat flange at cavity inside, and described screw rod is axially moved by lever drive; Thus, handle with sleeve, manual allowing screw rod press down disc spring seat or rise promotes disc spring seat to realize whole conducting and cutting-off process, and very convenient, all component is assembled mutually, is convenient to the High-efficient Production of production line.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of a kind of embodiment of the present utility model;
Fig. 2 is the sectional structure schematic diagram of a kind of embodiment of the present utility model;
Fig. 3 is the A place structure for amplifying schematic diagram of Fig. 2.
Description of reference numerals:
1-valve body, 2-first valve seat, 3-lower seal metal gasket, 4-second valve seat, 5-first spool, 6-second spool, the outer valve rod of 7-, 8-valve core housing, the upper sealing metal pad of 9-, 10-fastener assembly, 11-filler pressing sleeve, 12-hold-down grid, 13-valve rod connecting sleeve, 14-disc spring, 15-handle, 16-copper nut, 17-trapezoidal thread bar, 18-chock, 19-connecting sleeve upper plate, 20-disc spring seat, 21-inner valve stem, 22-upper valve body, valve body under 23-, 24-medium pipeline entrance, 25-medium pipeline exports, 26-stuffing box packing, 27-bearing.
Embodiment
Below in conjunction with drawings and Examples, the utility model embodiment is described:
As shown in Figures 1 to 3, it illustrates embodiment of the present utility model, as shown in the figure, the utility model is used for the Double-seal valve of high-temperature and pressure pipeline, comprises valve body 1, and valve body 1 both sides offer medium pipeline entrance 24 and medium pipeline outlet 25 respectively; Medium pipeline entrance 24 is positioned at the ends that the end of valve body 1 inside and medium pipeline outlet 25 be positioned at valve body 1 inside and is respectively access end and outlet ends; The cavity connects that access end and outlet ends and valve body center vertical direction are offered; In MEDIA FLOW circulation passage between medium pipeline entrance and access end, the cross section of medium pipeline entrance is circular and extends for substantially horizontal, and the MEDIA FLOW circulation passage of close access end extends towards the cavity of vertical direction, and access end overlaps with cavity bottom;
As shown in the figure, in MEDIA FLOW circulation passage between outlet ends and medium pipeline export, the cross section of medium pipeline outlet be circular and is substantially horizontal extension, and outlet ends is opened on the inwall of cavity, and exports with the medium pipeline of substantially horizontal and realize being communicated with of true dip direction;
As shown in the figure, the cavity inner wall that the cohesive position of described cavity inner wall and access end is provided with above the first valve seat 2, first valve seat 2 is provided with the second valve seat 4; Described outlet ends is positioned at above the second valve seat 4; Outlet ends, higher than access end, is easier to realize the sealing of spool lifting process for valve seat, also can realize sealing reliably, and medium pipeline entrance is the interface of medium input pipeline simultaneously;
As shown in the figure, the second spool 6 for sealing the second valve seat 4 and the first spool 5 for sealing the first valve seat 2 is also comprised; First spool 5 is fixedly connected with the bottom of inner valve stem 21; Second spool 6 is fixedly connected with the bottom of outer valve rod 7; Inner valve stem 21 is slidably installed outside in valve rod 7;
As shown in the figure, described outer valve rod 7 top is provided with disc spring seat 20, disc spring seat 20 comprise for stretch in outer valve rod 7 and with the vertical bar of inner valve stem 21 tip contact, vertical masthead end is be positioned at the flange that the outside and radial dimension of outer valve rod 7 is greater than inner valve stem 21; Described vertical bar is set with radial dimension and is greater than inner valve stem and the disc spring 14 being less than or equal to flange;
As shown in the figure, described cavity inside is also assembled with the screw rod with the tip contact of disc spring seat 20 flange, and described screw rod is driven by handle 15 and axially moves.
Preferably, as shown in the figure, valve core housing 8 is also provided with between described outer valve rod 7 and cavity inner wall; Valve core housing 8 bottom is assembled in the second valve seat 4 top; Described first spool 5 and the second spool 6 slide along valve core housing 8 inwall; Described outer valve rod 7 top extends to above valve core housing 8; Arrange the better tightness that valve core housing makes total, structure is more stable;
As shown in the figure, described outer valve rod 7 top arranges valve rod connecting sleeve 13; Described valve rod connecting sleeve 13 top arranges groove, the radial edges of described disc spring seat 20 and the sliding contact of groove cell wall; Described cavity inner wall, and the position be positioned at above valve rod connecting sleeve 13 is provided with the chock 18 along cavity radial protrusion.Arranging valve rod connecting sleeve can allow the assembling of disc spring seat more reliable, and the drive connection between screw rod and disc spring can realize more reliably; By the mobile position of chock restriction valve rod connecting sleeve axis, make can reset reliably during disc spring return, ensure that the unlatching completely when MEDIA FLOW circulation passage is opened, ensure flow velocity.
Preferably, as shown in the figure, the top groove inner wall of described valve rod connecting sleeve 13 is provided with connecting sleeve upper plate 19.Connecting sleeve upper plate has further sealing and guide function.
Preferably, as shown in the figure, described screw rod is trapezoidal thread bar 17; The cavity of described valve body is assembled with bearing 27 on the inwall on top, and bearing 27 inner ring is fixedly connected with copper nut 16, and the top engagement of described screw rod is arranged in copper nut 16; Copper nut 16 top extends to more than valve body 1 top, and the top of copper nut 16 fixedly mounts described handle 15.Trapezoidal thread bar not easily loosens and centering is very good; Realized the drive mechanism of feed screw nut by copper nut, transmission process is very reliable.
Preferably, as shown in the figure, described valve body 1 comprises the upper valve body 22 and lower valve body 23 that are connected by fastener assembly; Described fastener assembly 10 comprises screw bolt and nut; Described valve core housing 8 extends to the cavity of upper valve body 22 via the cavity of lower valve body 23; Described first spool 5 is one-body molded with inner valve stem 21, and described second spool 6 is one-body molded with outer valve rod 7.The assembling of upper valve body and lower valve body can make the maintenance of whole valve assembling more convenient, can safeguard, and efficiently can carry out the production of production line.
Preferably, as shown in the figure, be provided with lower seal metal gasket 3 between described first valve seat 2 and the second valve seat 4, the outer surface of described valve core housing 8 is provided with the boss embedding cavity inner wall, and the cooperation position of this boss and cavity inner wall is provided with sealing metal pad 9; Described valve core housing 8 is provided with the seal boss along valve core housing 8 radial protrusion near the position on top, be filled with a sealing between valve core housing 8 open top and seal boss filler 26; The position outer valve rod 7 being positioned at valve core housing 8 top is provided with filler pressing sleeve 11, on outer valve rod 7, is provided with hold-down grid 12 above filler pressing sleeve 11.The shape metallic leak-proof structure that the present embodiment adopts makes sealing effect reliable, wear-resistant; The setting of stuffing box packing, filler pressing sleeve and hold-down grid ensure that the reliable sealing of valve core housing position.
Preferably, as shown in the figure, described upper sealing metal pad 9 and lower seal metal gasket 3 are metal wound gasket; Described stuffing box packing 26 is graphite and/or establishment filler.
Preferably, as shown in the figure, blind hole is offered on the top of described disc spring seat 20, and the opening of blind hole extends internally making block, and described screw rod offers a circle groove near the position of bottom, and the block of described blind hole embeds in groove.Thus, screw rod reliably can drive the lifting of disc spring seat in lifting process, realizes opening and closing of whole MEDIA FLOW circulation passage.
Preferably, as shown in the figure, described disc spring 14 is multiple belleville springs axially superposed along the vertical bar of disc spring seat 20.
Preferably, as shown in the figure, described medium pipeline entrance 24 and medium pipeline outlet 25 offer internal thread for connecting media pipeline;
The center of described first valve seat 2 and the second valve seat 4 is the MEDIA FLOW through hole overlapped with the cavity of valve body 1; Described first spool 5 is cylindrical shape, and described second spool 6 is inverted pyramidal structures.
In above-described embodiment of the present utility model,
(1) during valve closing:
Turn clockwise handle 15, and copper nut 16 turns clockwise, and trapezoidal screw 17 moves down, and disc spring seat 20 moves down thereupon, and when disc spring does not have pressurized, valve rod connecting sleeve 13 is motionless.When disc spring 14 pressurized, valve rod connecting sleeve 13, outer valve rod 7, inner valve stem 21 and the first spool 5, second spool 6 move down simultaneously.Be rotated further handle 15, disc spring 14 pressurized increases gradually, and before the first spool 5 of inner valve stem does not also contact with the first valve seat 2, valve rod connecting sleeve 13, outer valve rod 7 drives the second descending elder generation of spool 6 to contact with the second valve seat 4, realizes first order sealing.Ceaselessly rotate with handle 15, disc spring 14 continues pressurized.Now, the first spool 5 of inner valve stem contacts with the first valve seat 2, realizes second level sealing.Valve is closed completely.
(2) during valve opening:
Be rotated counterclockwise handle 15, copper nut 16 is rotated counterclockwise, and trapezoidal screw 17 moves up, disc spring 14 pressurized, and valve rod connecting sleeve 13 moves on starting under the effect of medium.Second spool 6 opens the second valve seat 4 from valve, realizes the unlatching of first order sealing.Be rotated further handle 15, disc spring seat 20 moves up thereupon, and disc spring 14 discharges elasticity gradually, and equally under the effect of pressure medium, the first spool 5 leaves the first valve seat 2.Open secondary seal.Thus complete opening completely of valve.
By reference to the accompanying drawings the utility model preferred implementation is explained in detail above; but the utility model is not limited to above-mentioned mode of execution; in the ken that those of ordinary skill in the art possess; can also make a variety of changes under the prerequisite not departing from the utility model aim; these changes relate to correlation technique well-known to those skilled in the art, and these all fall into the protection domain of the utility model patent.
Do not depart from design of the present utility model and scope can make many other and change and remodeling.
Should be appreciated that the utility model is not limited to specific mode of execution, scope of the present utility model is defined by the following claims.
Claims (10)
1. for the Double-seal valve of high-temperature and pressure pipeline, comprise valve body, valve body both sides offer medium pipeline entrance and medium pipeline outlet respectively; Medium pipeline entrance is positioned at the end that the end of valve inner and medium pipeline outlet be positioned at valve inner and is respectively access end and outlet ends; The cavity connects that access end and outlet ends and valve body center vertical direction are offered; It is characterized in that:
The cohesive position of described cavity inner wall and access end is provided with the first valve seat, and the cavity inner wall above the first valve seat is provided with the second valve seat; Described outlet ends is positioned at above the second valve seat;
Also comprise the second spool for sealing the second valve seat and the first spool for sealing the first valve seat; First spool is fixedly connected with the bottom of inner valve stem; Second spool is fixedly connected with the bottom of outer valve rod; Inner valve stem is slidably installed outside in valve rod;
Described outer valve stem tip is provided with disc spring seat, disc spring seat comprise for stretch in outer valve rod and with the vertical bar of inner valve stem tip contact, vertical masthead end is be positioned at outer stem exterior and radial dimension is greater than the flange of inner valve stem; Described vertical bar is set with radial dimension and is greater than inner valve stem and the disc spring being less than or equal to flange;
Described cavity inside is also assembled with the screw rod with the tip contact of disc spring seat flange, and described screw rod is axially moved by lever drive.
2., as claimed in claim 1 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: between described outer valve rod and cavity inner wall, be also provided with valve core housing; Valve core housing bottom is assembled in the second valve seat top; Described first spool and the second spool slide along valve core housing inwall; Described outer valve stem tip extends to above valve core housing;
Described outer valve stem tip arranges valve rod connecting sleeve; Described valve rod connecting sleeve top arranges groove, the radial edges of described disc spring seat and the sliding contact of groove cell wall; Described cavity inner wall, and the position be positioned at above valve rod connecting sleeve is provided with the chock along cavity radial protrusion.
3., as claimed in claim 2 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: the top groove inner wall of described valve rod connecting sleeve is provided with connecting sleeve upper plate.
4., as claimed in claim 2 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: described screw rod is trapezoidal thread bar; The cavity of described valve body is assembled with bearing on the inwall on top, and bearing inner race is fixedly connected with copper nut, and the top engagement of described screw rod is arranged in copper nut; Copper nut top extends to more than valve body top, and the top of copper nut fixedly mounts described handle.
5., as claimed in claim 2 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: described valve body comprises the upper valve body and lower valve body that are connected by fastener assembly; Described fastener assembly comprises screw bolt and nut; Described valve core housing extends to the cavity of upper valve body via the cavity of lower valve body; Described first spool and inner valve stem one-body molded, described second spool and outer valve-stem integrated shaping.
6. as claimed in claim 2 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: between described first valve seat and the second valve seat, be provided with lower seal metal gasket, the outer surface of described valve core housing is provided with the boss embedding cavity inner wall, and the cooperation position of this boss and cavity inner wall is provided with sealing metal pad; Described valve core housing is provided with the seal boss along valve core housing radial protrusion near the position on top, and be filled with a sealing between valve core housing open top and seal boss filler; The position outer valve rod being positioned at valve core housing top is provided with filler pressing sleeve, on outer valve rod, is provided with hold-down grid above filler pressing sleeve.
7., as claimed in claim 6 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: described upper sealing metal pad and lower seal metal gasket are metal wound gasket; Described stuffing box packing is graphite and/or establishment filler.
8. as claimed in claim 2 for the Double-seal valve of high-temperature and pressure pipeline, it is characterized in that: blind hole is offered on the top of described disc spring seat, the opening of blind hole extends internally making block, and described screw rod offers a circle groove near the position of bottom, and the block of described blind hole embeds in groove.
9. the Double-seal valve for high-temperature and pressure pipeline as described in as arbitrary in claim 1 ~ 8, is characterized in that: described disc spring is the belleville springs of the axial superposition of multiple vertical bars along disc spring seat.
10. the Double-seal valve for high-temperature and pressure pipeline as described in as arbitrary in claim 1 ~ 8, is characterized in that: described medium pipeline entrance and medium pipeline outlet offer the internal thread for connecting media pipeline;
The center of described first valve seat and the second valve seat is the MEDIA FLOW through hole overlapped with the cavity of valve body; Described first spool is cylindrical shape, and described second spool is inverted pyramidal structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520789918.9U CN205047860U (en) | 2015-10-14 | 2015-10-14 | A two valves for high temperature high pressure pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520789918.9U CN205047860U (en) | 2015-10-14 | 2015-10-14 | A two valves for high temperature high pressure pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205047860U true CN205047860U (en) | 2016-02-24 |
Family
ID=55341439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520789918.9U Withdrawn - After Issue CN205047860U (en) | 2015-10-14 | 2015-10-14 | A two valves for high temperature high pressure pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205047860U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134973A (en) * | 2015-10-14 | 2015-12-09 | 泉州市中天石油化工机械制造有限公司 | Double-seal ring for high-temperature high-pressure pipelines |
| CN114183539A (en) * | 2021-11-29 | 2022-03-15 | 上海齐耀动力技术有限公司 | Magnetic drive type vacuum drawing valve |
-
2015
- 2015-10-14 CN CN201520789918.9U patent/CN205047860U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134973A (en) * | 2015-10-14 | 2015-12-09 | 泉州市中天石油化工机械制造有限公司 | Double-seal ring for high-temperature high-pressure pipelines |
| CN105134973B (en) * | 2015-10-14 | 2017-11-03 | 泉州市中天石油化工机械制造有限公司 | Double-seal valve for high-temperature and pressure pipeline |
| CN114183539A (en) * | 2021-11-29 | 2022-03-15 | 上海齐耀动力技术有限公司 | Magnetic drive type vacuum drawing valve |
| CN114183539B (en) * | 2021-11-29 | 2024-05-10 | 上海齐耀动力技术有限公司 | Magnetic force driving type vacuum drawing valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160224 Effective date of abandoning: 20171103 |
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| AV01 | Patent right actively abandoned |