CN204437290U - A kind of low temperature modulating valve - Google Patents
A kind of low temperature modulating valve Download PDFInfo
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- CN204437290U CN204437290U CN201420868309.8U CN201420868309U CN204437290U CN 204437290 U CN204437290 U CN 204437290U CN 201420868309 U CN201420868309 U CN 201420868309U CN 204437290 U CN204437290 U CN 204437290U
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- valve
- low temperature
- rotating hole
- connecting rod
- valve body
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Abstract
The utility model relates to a kind of low temperature modulating valve, comprises, valve body, water-inlet cavity and water chamber, valve seat, connecting tube, valve gap, actuator, be arranged with elastic packing pipe outside valve rod, valve body internal fixtion is provided with anti-rotary seat, anti-rotary seat forms the anti-rotating hole with the connecting rod form fit at spool top, connecting rod extend in described anti-rotating hole and also can move along the length direction of described anti-rotating hole, and described connecting rod cannot rotate by described anti-rotating hole inwall restriction.By being provided with the anti-rotary seat of anti-rotating hole at valve body internal fixtion, the inwall of anti-rotating hole stops connecting rod to rotate by the direct effect of mechanical force, thus prevention Spool rotating, as long as anti-rotating hole and connecting rod are not damaged, anti-rotating hole just can stop connecting rod to rotate, and thus, still can prevent valve core rotation when can pass into high-velocity fluid in valve body, and low temperature modulating valve adaptability of the present utility model is high, no matter be all effectively can stop valve core rotation under high-velocity fluid or low velocity fluid.
Description
Technical field
The utility model relates to a kind of low temperature modulating valve, belongs to valve manufacture field.
Background technique
Low temperature modulating valve is a kind of at low temperature, the modulating valve that cryogenic application uses.Usual employing long-neck valve gap design, has the advantages such as general structure is compact, lightweight, good stability.Be widely used in metallurgy, empty point, low temperature, the cryogenic application such as oxygen, oil, chemical industry.Accurately can control cryogenic gas, the process parameter of fluid (as liquid oxygen, liquid argon etc.) remains on given definite value.
Existing low temperature modulating valve comprises valve body, valve gap, valve body both sides are respectively equipped with water-inlet cavity, water chamber, sleeve is provided with between water-inlet cavity and water chamber, sleeve is provided with perforate, and its lower end is provided with valve seat, and its center is provided with spool, spool in succession top valve rod, valve rod, by actuating mechanism controls, by the lifting of spool, plays the effect of keying and throttling pressure regulation.Fluid is entering in the process of body cavity by water-inlet cavity, due to the existence of angle of rotation, eddy motion will be produced, find in practice, this eddy motion will slowly drive valve core rotation gradually, after longer a period of time, spool will turn over larger angle, thus cause rising or the decline of spool, cause working condition to change, and affect the sealing of spool.
Chinese patent literature CN203948642U discloses a kind of anti-rotation modulating valve, body cavity is divided into symmetrical two-part, fluid enters body cavity by water-inlet cavity, and when flowing through guiding rib, original ring runner is cut off, the turbulent state of fluid is broken, form turbulent flow, the fluid of turbulence state is comparatively even to the active force of spool, cannot produce active force in the same way, thus avoid the rotation of spool, throttling spool voltage regulation function is stablized.But just can play anti-rotation effect when this valve can only work under lower than the fluid of certain flow rate after finalization of the manufacture, when rate of flow of fluid is too high, the effect of the cut-out ring runner of guiding rib will reduce, and spool still can rotate.
Model utility content
For this reason, technical problem to be solved in the utility model is that low temperature modulating valve of the prior art prevents the technical problem of valve core rotation when cannot pass into high-velocity fluid in valve body, thus propose a kind of high-velocity fluid that passes in valve body and can prevent valve core rotation, adaptable low temperature modulating valve.
For solving the problems of the technologies described above, a kind of low temperature modulating valve of the present utility model, comprise, valve body, be arranged on water-inlet cavity and the water chamber of described valve body both sides, be arranged on the valve seat in described valve body and spool, extend into described valve inner and the valve rod be connected with spool, and actuator, described actuator can control valve rod axially move to drive described spool away from or near described valve seat, thus regulating the aperture of path between water-inlet cavity and water chamber, projecting vertically on described spool have connecting rod; Described valve body internal fixtion is provided with anti-rotary seat, the limited mechanism of described anti-rotary seat limits and cannot rotate, described anti-rotary seat forms the anti-rotating hole with described connecting rod form fit, described connecting rod extend in described anti-rotating hole and also along the axial motion of described anti-rotating hole under the drive of valve rod, and can be limited and cannot rotate.
Low temperature modulating valve of the present utility model, described anti-rotary seat comprises the lib forming described anti-rotating hole, be molded over the protruding end projecting towards described spool direction of described body side, be formed with the guide channel holding described connecting rod in the middle of described protruding end, described guide channel is connected with described anti-rotating hole.
Low temperature modulating valve of the present utility model, the bottom of described protruding end is provided with and is coaxially connected with described anti-rotating hole and internal diameter is greater than the mounting groove of described guide channel internal diameter, described connecting rod is socketed with guide sleeve, described connecting rod extend in described guide channel, and described guide sleeve coordinates fixing with the sidewall of described mounting groove.
Low temperature modulating valve of the present utility model, the position that described connecting rod upper end coordinates with anti-rotating hole is provided with anti-rotation section, and the cross section of described anti-rotation section is polygonal.
Low temperature modulating valve of the present utility model, the cross section of described anti-rotation section is square.
Low temperature modulating valve of the present utility model, also comprise the connecting tube being arranged on hollow on valve body, sealing cover is contained in the valve gap of the top open part of described connecting tube, described valve stem seal is also socketed the inside being arranged on described connecting tube through described valve gap, the top of described valve rod is connected with described actuator, the bottom of described valve rod connects described spool, elastic packing pipe box is connected on described valve rod and with the bottom of valve rod and is fixedly connected with, described position-limit mechanism is the inner chamber arranged near described valve body and described connecting tube binding site, described anti-rotary seat is entrenched in described inner chamber, described anti-rotary seat forms multiple through holes that the inner space of described connecting tube is communicated with the inner space of described valve body.
Low temperature modulating valve of the present utility model, described position-limit mechanism comprises the boss extended radially inwardly be molded on described valve interior wall, the flange extended radially inwardly be oppositely arranged with described boss being molded over described connecting tube bottom, and the axial projection to be connected with flange, described boss jointly coordinates with described flange and axial projection and forms described inner chamber.
Low temperature modulating valve of the present utility model, have gap between the bottom of described anti-rotary seat and described boss, the outer wall of described spool is socketed with sleeve, the top of described sleeve is positioned at described gap, and inwall is resisted against on described anti-rotary seat, outer wall is resisted against on described boss.
Low temperature modulating valve of the present utility model, on the outer wall of described valve gap, circumference is provided with the draining board extended radially outwardly, and the horizontal projected area of described draining board is not less than the horizontal projected area of described valve gap.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) low temperature modulating valve of the present utility model, by being provided with the anti-rotary seat of anti-rotating hole at valve body internal fixtion, the inwall of anti-rotating hole stops connecting rod to rotate by the direct effect of mechanical force, thus prevention Spool rotating, as long as anti-rotating hole and connecting rod are not damaged, anti-rotating hole just can stop connecting rod to rotate, thus, still valve core rotation can be prevented when passing into high-velocity fluid in valve body, and low temperature modulating valve adaptability of the present utility model is high, no matter be all effectively can stop valve core rotation under high-velocity fluid or low velocity fluid.
(2) low temperature modulating valve of the present utility model, limits the operation of connecting rod by arranging guide channel, thus the position of restriction spool, spool is alignd with valve seat, ensures accurately to control the flowing of valve inner fluid.
(3) low temperature modulating valve of the present utility model, guide sleeve is socketed with connecting rod and is connected, when specifically using, because guide sleeve and anti-rotary seat are different parts, thus guide sleeve is only needed to be arranged to be made up of high-abrasive material, and the whole protruding end of anti-rotary seat will all not be arranged to high-abrasive material, improve the working life of low temperature modulating valve and reduce cost of production.
(4) low temperature modulating valve of the present utility model, by the cross section of described connecting rod is set to non-circular polygon structure, thus makes connecting rod more firmly cannot be rotated by the restriction of anti-rotating hole inwall.
(5) low temperature modulating valve of the present utility model, when actuator's band ovable valve stem rotates, valve rod band movable valve plug does vertical motion, and stretches or pressure elasticity sealed pipe, elastic packing pipe is uncrossed generation elastic strain in connecting tube, ensures that elastic packing pipe is to the sealing of valve rod.After arranging through hole, the inner space of described connecting tube is communicated with the inner space of described valve body, thus the pressure of the inner space of the inner space of described connecting tube and described valve body is consistent, and ensures that low temperature modulating valve runs stable.
(6) low temperature modulating valve of the present utility model, described valve body forms the boss extended radially inwardly on the inwall of described connecting tube; The bottom of described connecting tube forms the flange extended radially inwardly be oppositely arranged with described boss and the axial projection be connected with flange, and described boss jointly coordinates with described flange and axial projection and forms described inner chamber.By described boss, described flange, axial projection clamping anti-rotary seat, anti-rotary seat is firmly fixed, anti-rotary seat is not rotated by the drive of spool.
(7) low temperature modulating valve of the present utility model, the sleeve arranged is on the one hand by fixing valve seat against living valve seat, also can limit the moving region of spool on the other hand, ensure that valve seat can be aimed at all the time in the position of spool, ensure accurately to control the flowing of valve inner fluid.
(8) low temperature modulating valve of the present utility model, by arranging draining board, can block on the one hand the passage that the condensed water that formed at valve body by low temperature in valve body/ultralow temperature medium influence and ice cube rise outward, preventing from impacting top actuator; On the other hand, rainwater and the condensed water instillation valve body of top can be prevented.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is the sectional view of the low temperature modulating valve of the utility model 1 embodiment 1;
Fig. 2 is the enlarged view of dashed rectangle position in the utility model 1 Fig. 1.
In figure, reference character is expressed as: A-water-inlet cavity; B-water chamber; 1-valve body; 2-valve seat; 3-spool; 4-anti-rotary seat; 5-valve rod; 6-elastic packing pipe; 7-connecting tube; 8-valve gap; 9-draining board; 10-filler; 11-actuator; 12-boss; 31-connecting rod; The anti-bull stick of 31a-; 41-protruding end; 42-body; 43-through hole; 44-sleeve; 45-anti-rotating hole; 46-guide channel; 47-guide sleeve; 71-flange; 72-axial projection.
Embodiment
Below in conjunction with accompanying drawing, low temperature modulating valve of the present utility model is described in detail.
Embodiment 1
The present embodiment provides a kind of low temperature modulating valve, as shown in Figure 1, 2, comprise, valve body 1, be arranged on water-inlet cavity A and the water chamber B of described valve body 1 both sides, be arranged on the valve seat 2 in described valve body 1 and spool 3, extend into described valve body 1 inside and the valve rod 5 be connected with spool 3, and actuator 11, described actuator 11 can control valve rod 5 axially move to drive described spool 3 away from or near described valve seat 2, thus regulating the aperture of path between water-inlet cavity A and water chamber B, projecting vertically on described spool 3 have connecting rod 31; Described valve body 1 internal fixtion is provided with anti-rotary seat 4, the limited mechanism of described anti-rotary seat 4 limits and cannot rotate, described anti-rotary seat 4 forms the anti-rotating hole 45 with described connecting rod 31 form fit, described connecting rod 31 extend in described anti-rotating hole 45 and also along the axial motion of described anti-rotating hole 45 under the drive of valve rod 5, and can be limited and cannot rotate.Elastic packing pipe 6 described in the present embodiment is bellows.
By being provided with the anti-rotary seat 4 of anti-rotating hole 45 at valve body 1 internal fixtion, anti-rotating hole 45 stops connecting rod 31 to rotate by the direct effect of mechanical force, thus stop spool 3 to rotate, as long as anti-rotating hole 45 and connecting rod 31 are not damaged, anti-rotating hole 45 just can stop connecting rod 31 to rotate, thus, still can prevent spool 3 from rotating when passing into high-velocity fluid in valve body 1, and the low temperature modulating valve adaptability of the present embodiment is high, no matter be under high-velocity fluid or low velocity fluid, all can effectively stop spool 3 to rotate.
The low temperature modulating valve of the present embodiment, described anti-rotary seat 4 comprises the lib 42 forming described anti-rotating hole 45, be molded over the protruding end 41 projecting towards described spool 3 direction of described body 42 side, be formed with the guide channel 46 holding described connecting rod 31 in the middle of described protruding end 41, described guide channel 46 is connected with described anti-rotating hole 45.
The operation of connecting rod 31 is limited by arranging guide channel 46, thus the position of restriction spool 3, ensure that spool 3 aligns with valve seat 2.
The low temperature modulating valve of the present embodiment, the bottom of described protruding end 41 is provided be connected and internal diameter be greater than the mounting groove of described guide channel 46 internal diameter coaxial with described guide channel 46, described connecting rod 31 extend in described guide channel 46, described connecting rod 31 is socketed with guide sleeve 47, and the outer wall of described guide sleeve 47 coordinates fixing with the sidewall of described mounting groove.
Because guide sleeve 47 is different parts from protruding end 41, and guide sleeve 47 is socketed on connecting rod 31, thus only need guide sleeve 47 is arranged to be made up of high-abrasive material and will be all arranged to be made up of high-abrasive material in whole protruding end 41, improve the working life of low temperature modulating valve and reduce cost of production.Described guide sleeve 47 is manufactured by 304+STL.6, has STL.6 material in 304 stainless steel top layer built-up welding, and STL.6 material has very high wear-resisting, anti-corrosion, anti-oxidant and curing capacity, improves the working life of low temperature modulating valve.
The low temperature modulating valve of the present embodiment, the position that described connecting rod 31 upper end coordinates with anti-rotating hole 45 is provided with anti-rotation section 31a, and the cross section of described anti-rotation section 31a is polygonal.Particularly, the cross section of described anti-rotation section 31a is square, can certainly be regular hexagon or Octagon etc.
By the cross section of described anti-rotation section 31a is set to non-circular structure, the shape of cross section of guide sleeve 47 inwall is identical with described connecting rod 31, and thus described connecting rod 31 cannot rotate by the restriction of anti-rotating hole 45 inwall.
As the distortion of anti-rotation section 31a set-up mode, the independently body of rod that anti-rotation section 31a also can be arranged to be separated with connecting rod 31 forms anti-bull stick, valve rod 5 and connecting rod 31 is connected by anti-bull stick, arranging independently anti-bull stick can make the machine shaping difficulty of connecting rod 31 reduce, and makes the dismounting of rotation restraining portion convenient.
The low temperature modulating valve of the present embodiment, also comprise the connecting tube 7 being arranged on hollow on valve body 1, sealing cover is contained in the valve gap 8 of the top open part of described connecting tube 7, valve gap 8 described in described valve rod 5 hermetically passing is also socketed the inside being arranged on described connecting tube 7, the top of described valve rod 5 is connected with described actuator 11, the bottom of described valve rod 5 connects described spool 3, elastic packing pipe 6 to be socketed on described valve rod 5 and to be fixedly connected with the bottom of valve rod 5, described position-limit mechanism is the inner chamber arranged near described valve body 1 and described connecting tube 7 binding site, described anti-rotary seat 4 is entrenched in described inner chamber, described anti-rotary seat 4 forms multiple through holes 43 that the inner space of described connecting tube 7 is communicated with the inner space of described valve body 1.
Low temperature modulating valve in the present embodiment, when actuator 11 is with ovable valve stem 5 to rotate, band movable valve plug 3 does vertical motion together, and stretch or pressure elasticity sealed pipe 6, elastic strain is there is in elastic packing pipe 6 in connecting tube 7, connecting tube 7 makes the deformation of elastic packing pipe 6 do not hindered, and ensures the sealing of elastic packing pipe 6 pairs of valve rods 5.After arranging through hole 43, the inner space of described connecting tube 7 is communicated with the inner space of described valve body 1, thus the pressure of the inner space of described connecting tube 7 and the inner space of described valve body 1 is consistent, and ensures that low temperature modulating valve runs stable.
Realize first sealing by arranging elastic packing pipe 6, valve rod 5 and fluid are isolated, and the filler 10 be located between valve rod 5 and valve gap 8 defines second and seal, just seal at the elastic packing pipe 6 lower filler 10 that breaks down like this.Make fluid be hermetically sealed in valve by arranging two seals measure, anti-fluid is leaked.Actuator 11 is pneumatic head, and actuatable valve bar 5 rotates and then moves with the opening and closing of regulation valve body internal flow distribution channel with movable valve plug 3 and regulate fluid flow.
The low temperature modulating valve of the present embodiment, described inner chamber as position-limit mechanism adopts following concrete mode to be formed: on described valve body 1 inwall, form the boss 12 extended radially inwardly, the flange 71 extended radially inwardly be oppositely arranged with described boss 12 is formed in the bottom of described connecting tube 7, and the axial projection 72 to be connected with flange 71, described boss 12 jointly coordinates with described flange 71 and axial projection 72 and forms described inner chamber.Clamp anti-rotary seat 4 by described boss 12 with described flange 71 and axial projection about 72, anti-rotary seat 4 is firmly fixed, anti-rotary seat 4 is not rotated by the drive of spool 3.
The low temperature modulating valve of the present embodiment, have gap between the bottom of described anti-rotary seat 4 and described boss 12, the outer wall of described spool 3 is socketed with sleeve 44, the top of described sleeve 44 is positioned at described gap, and inwall is resisted against on described anti-rotary seat 4, outer wall is resisted against on described boss 12.By the described restriction of sleeve 44 inwall, the length direction along described sleeve 44 moves described spool 3.
Sleeve 44 1 aspect arranged, by being fixed by valve seat 2 against living valve seat 2, also can limit the moving region of spool 3 on the other hand, ensures that the position of spool 3 can aim at valve seat 2 all the time, ensures accurately to control the flowing of valve inner fluid.
The low temperature modulating valve of the present embodiment, on the outer wall of described valve gap 8, circumference is provided with the draining board 9 extended radially outwardly, and the horizontal projected area of described draining board 9 is not less than the horizontal projected area of described valve gap 8.
By arranging draining board 9, the passage that the condensed water that formed at valve body by low temperature in valve body 1/ultralow temperature medium influence and ice cube rise can be blocked on the one hand outward, prevent from impacting top actuator; On the other hand, rainwater and the condensed water instillation valve of top can be prevented.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.
Claims (9)
1. a low temperature modulating valve, comprise, valve body (1), be arranged on water-inlet cavity (A) and the water chamber (B) of described valve body (1) both sides, be arranged on the valve seat (2) in described valve body (1) and spool (3), extend into described valve body (1) inside and the valve rod (5) be connected with spool (3), and actuator (11), described actuator (11) can control valve rod (5) axially move to drive described spool (3) away from or near described valve seat (2), thus regulate the aperture of path between water-inlet cavity (A) and water chamber (B), it is characterized in that, projecting vertically on described spool (3) have connecting rod (31), described valve body (1) internal fixtion is provided with anti-rotary seat (4), the limited mechanism of described anti-rotary seat (4) limits and cannot rotate, described anti-rotary seat (4) forms the anti-rotating hole (45) with described connecting rod (31) form fit, described connecting rod (31) extend in described anti-rotating hole (45) and also along the axial motion of described anti-rotating hole (45) under the drive of valve rod (5), and can be limited and cannot rotate.
2. low temperature modulating valve according to claim 1, it is characterized in that, described anti-rotary seat (4) comprises the lib (42) forming described anti-rotating hole (45), be molded over the protruding end (41) projecting towards described spool (3) direction of described body (42) side, be formed with the guide channel (46) holding described connecting rod (31) in the middle of described protruding end (41), described guide channel (46) is connected with described anti-rotating hole (45).
3. low temperature modulating valve according to claim 2, it is characterized in that, the bottom of described protruding end (41) is provided be connected and internal diameter be greater than the mounting groove of described guide channel (46) internal diameter coaxial with described anti-rotating hole (45), described connecting rod (31) is socketed with guide sleeve (47), described connecting rod (31) extend in described guide channel (46), and described guide sleeve (47) coordinates fixing with the sidewall of described mounting groove.
4. according to the arbitrary described low temperature modulating valve of claim 1-3, it is characterized in that, the position that described connecting rod (31) upper end coordinates with anti-rotating hole (45) is provided with anti-rotation section (31a), and the cross section of described anti-rotation section (31a) is polygonal.
5. low temperature modulating valve according to claim 4, is characterized in that, the cross section of described anti-rotation section (31a) is square.
6. the low temperature modulating valve according to claim 1 or 2 or 3 or 5, it is characterized in that, also comprise the connecting tube (7) being arranged on the upper hollow of valve body (1), sealing cover is contained in the valve gap (8) of the top open part of described connecting tube (7), valve gap (8) described in described valve rod (5) hermetically passing is also socketed the inside being arranged on described connecting tube (7), the top of described valve rod (5) is connected with described actuator (11), the bottom of described valve rod (5) connects described spool (3), elastic packing pipe (6) is socketed in described valve rod (5) and goes up and be fixedly connected with the bottom of valve rod (5), described position-limit mechanism is the inner chamber arranged near described valve body (1) and described connecting tube (7) binding site, described anti-rotary seat (4) is entrenched in described inner chamber, described anti-rotary seat (4) forms multiple through holes (43) that the inner space of described connecting tube (7) is communicated with the inner space of described valve body (1).
7. low temperature modulating valve according to claim 6, it is characterized in that, described position-limit mechanism comprises the boss (12) extended radially inwardly be molded on described valve body (1) inwall, the flange (71) extended radially inwardly be oppositely arranged with described boss (12) being molded over described connecting tube (7) bottom, and the axial projection (72) to be connected with flange (71), described boss (12) jointly coordinates with described flange (71) and axial projection (72) and forms described inner chamber.
8. low temperature modulating valve according to claim 7, it is characterized in that, between the bottom of described anti-rotary seat (4) and described boss (12), there is gap, the outer wall of described spool (3) is socketed with sleeve (44), the top of described sleeve (44) is positioned at described gap, and inwall is resisted against on described anti-rotary seat (4), outer wall is resisted against on described boss (12).
9. low temperature modulating valve according to claim 6, it is characterized in that, on the outer wall of described valve gap (8), circumference is provided with the draining board (9) extended radially outwardly, and the horizontal projected area of described draining board (9) is not less than the horizontal projected area of described valve gap (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420868309.8U CN204437290U (en) | 2014-12-31 | 2014-12-31 | A kind of low temperature modulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420868309.8U CN204437290U (en) | 2014-12-31 | 2014-12-31 | A kind of low temperature modulating valve |
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| Publication Number | Publication Date |
|---|---|
| CN204437290U true CN204437290U (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420868309.8U Expired - Fee Related CN204437290U (en) | 2014-12-31 | 2014-12-31 | A kind of low temperature modulating valve |
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| CN (1) | CN204437290U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798368A (en) * | 2019-02-27 | 2019-05-24 | 苏州纽威阀门股份有限公司 | A kind of seperating range control valve |
| CN110274032A (en) * | 2019-06-18 | 2019-09-24 | 南方风机股份有限公司 | A kind of air-valve |
| CN113236803A (en) * | 2021-06-08 | 2021-08-10 | 杭州维赫控制仪表有限公司 | Antibiotic pneumatic adjustment trip valve |
-
2014
- 2014-12-31 CN CN201420868309.8U patent/CN204437290U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798368A (en) * | 2019-02-27 | 2019-05-24 | 苏州纽威阀门股份有限公司 | A kind of seperating range control valve |
| CN109798368B (en) * | 2019-02-27 | 2023-08-29 | 苏州纽威阀门股份有限公司 | Part-way regulating valve |
| CN110274032A (en) * | 2019-06-18 | 2019-09-24 | 南方风机股份有限公司 | A kind of air-valve |
| CN113236803A (en) * | 2021-06-08 | 2021-08-10 | 杭州维赫控制仪表有限公司 | Antibiotic pneumatic adjustment trip valve |
| CN113236803B (en) * | 2021-06-08 | 2022-12-13 | 杭州维赫控制仪表有限公司 | Antibiotic pneumatic adjustment trip valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20211231 |
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| CF01 | Termination of patent right due to non-payment of annual fee |