CN102878304A - Fluid medium stop valve - Google Patents
Fluid medium stop valve Download PDFInfo
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- CN102878304A CN102878304A CN2012103642792A CN201210364279A CN102878304A CN 102878304 A CN102878304 A CN 102878304A CN 2012103642792 A CN2012103642792 A CN 2012103642792A CN 201210364279 A CN201210364279 A CN 201210364279A CN 102878304 A CN102878304 A CN 102878304A
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Abstract
The invention discloses a fluid medium stop valve. The fluid medium stop valve effectively prevents medium from leaking from a thin position of a seal between a valve stem and a bonnet during plugging and also prevents the inconvenience caused by the fact that the medium in the valve body needs to be completely drained for corresponding operation during maintenance. The fluid medium stop valve comprises a valve stem which a bonnet is sleeved on. Sealing filler is arranged between the valve stem and the bonnet. A force application member is arranged at one end of the bonnet, the valve body penetrates through the other end of the bonnet, and contact surfaces of the bonnet and the valve body are hermetically connected. A valve seat is disposed in a cavity of the valve body and is divided into an upper cavity and a lower cavity by the valve seat. One end of the valve stem is connected with the application member which can drive the valve stem to axially move. The other end of the valve stem sequentially penetrates through the upper cavity inside the valve body and the valve seat and extends into the lower cavity. A spool is arranged at the end of the valve stem of the lower cavity. The lower surface of the valve seat and the upper surface of a spool serve as plugging surfaces. When the spool is driven by the fore application member, the upper surface of the spool can be pressed back to the lower surface of the valve seat to achieve plugging.
Description
Technical field
The present invention relates to a kind of sealing configuration of flowing medium, be specially a kind of cut-off valve for flowing medium.
Background technique
For flowing medium, especially as the LNG(LNG Liquefied natural gas) medium that this class low temperature is inflammable, explosive, poisonous, need to be equipped with the tank car of low temperature Emergeny Cutoff Valves to transport.The MEDIA FLOW of existing cut-off valve is to the form that adopts high in and low out.Realize the structure of this form as shown in fig. 1, comprise the valve rod 8 that is socketed in the valve gap.One end of valve rod 8 is provided with spool 13, and this spool 13 is arranged in the valve body 11.Valve body 11 is separated into up and down two cavitys by valve seat 12.Wherein, upper cavity 18 comprises upper surface, MEDIA FLOW entrance 17 and the valve body 11 of valve seat 12 and the perforation end of valve rod 8; 19 of lower chambers comprise lower surface and the MEDIA FLOW outlet 18 of valve seat 12.Set spool 13 is arranged in the upper cavity 18 of valve body 11 in the prior art on the valve rod 8.Owing to be socketed with valve gap on the valve rod 8, one end of valve gap connects with valve body 11 and is connected, for preventing that medium 1 is from the valve gap outflow, so seal accordingly by following two kinds of measures: one, realize being tightly connected by valve gap packing ring 10 is set in the joint of valve gap and valve body 11; Two, between the shaft of valve gap and valve rod 8, stem packing 7 is set, realizes the sealing between valve rod 8 and the valve gap.When closing valve seat 12, operation setting is at the force application part of valve rod 8 the other ends, and valve rod 8 can axial displacement.Because spool 13 is arranged in the upper cavity 18 of valve body 11, so the shutoff face of spool 13 is lower surface, that is to say that valve rod 8 need to be to bottom offset, spool 13 can overlap with the upper surface of valve seat 12, and then realizes shutoff.By as can be known above-mentioned, cut-off valve of the prior art, medium 1 is to enter the upper cavity 18 of valve body 11 (as shown by the arrows in Figure 1 direction) from MEDIA FLOW entrance 17, because the spool 13 that is overlapped and the shutoff of valve seat 12, medium 21 can rest in the upper cavity 18, has realized that with this flowing medium 1 cuts off the purpose of shutoff.The upper surface of the lower surface of spool 13 and valve seat 12 is shutoff face in the prior art.When needs dissolution medium 1, spool 13 is opened, medium 1 is flowed out from the lower chamber 19 of valve body 11 get final product.Said process namely is so-called high in and low out.
But existing problem is in the prior art: as can be seen from Figure 1, flow out cut-off valve outward in order to prevent medium, be tightly connected although be provided with 10 formation of valve gap packing ring between valve gap and valve body 11, and be provided with stem packing 7 between valve rod 8 and valve gap.But, flow to the upper cavity 18 of valve body 11 when medium 1 after, can enter simultaneously in the valve gap that connects with valve body 11, namely the gap between valve rod 8 and the valve gap.So no matter valve seat and spool are in and open or the state of closing, the pipeline between outside tank body and the cut-off valve namely between valve rod and the valve gap, is bearing the pressure medium identical with valve body all the time.And the stem packing between valve gap packing ring, valve gap and the valve rod between valve gap and the valve body, these two positions are sealing materials owing to what adopt, so voltage endurance capability is not high, generally are weak parts for cut-off valve, also are potential medium leak points.After the mechanical accidents such as seal failure or valve gap are collided are damaged, medium possibly along the seal failure position or damaged part reveal in a large number, and then may cause and poison or the security incidents such as blast.In addition, structure according to cut-off valve in the prior art, if stem packing or valve gap packing ring are changed, also need valve body is taken apart, with in the up and down cavity of valve body and the pressure medium in valve gap and the valve lever clearance thoroughly discharge and can begin upkeep operation.Whole process is consuming time longer, and operating procedure is various, and the production safety many factors that need to consider when changing is for operator have brought great inconvenience.
Summary of the invention
In view of this, the invention provides a kind of flowing medium cut-off valve, can make the medium low in and high out, effectively avoid valve body when shutoff, valve gap is subject to pressure medium and the situation of easy impaired leakage simultaneously with sealing filling place that is connected sealing place, valve gap and valve rod of valve.
For solving above technical problem, technological scheme of the present invention is, a kind of flowing medium cut-off valve comprises the valve rod that is socketed with valve gap, and an end of valve gap connects and is provided with valve body, and the surface of contact between valve gap and the valve body is tightly connected; The other end of valve gap is provided with force application part; Described valve inner is provided with valve seat, and valve seat is divided into upper cavity and lower chamber with valve body; Be sealed with stem packing between the shaft of described valve rod and the valve gap, an end of valve rod is connected with force application part, and force application part can drive valve rod axial displacement, and the other end of valve rod passes upper cavity and the valve seat of valve inner successively, is arranged in lower chamber; The described valve rod end place that is positioned at lower chamber is provided with spool, and the lower surface of described valve seat and the upper surface of spool are shutoff face, but the drive of described spool by force application part makes its upper surface back pressure in the lower surface of valve seat, forms sealed condition.
Further, described valve body is the four-way structure, comprises the outlet of the MEDIA FLOW entrance that is oppositely arranged and MEDIA FLOW and the openings and the mounting hole that are oppositely arranged, and this openings is connected with described valve gap, described mounting hole is provided with the valve body lower cover, is tightly connected between mounting hole and the valve body lower cover.
Further, the diameter of described valve body mounting hole is greater than the diameter of spool.
Further, be provided with the aligning ball between described spool and the valve rod, spool and valve rod form self-aligning and are flexibly connected, for adjusting the overlap degree of spool with valve seat shutoff face.
Further, the central position of described spool is provided with axis hole, and the termination of described valve rod is arranged in this axis hole and forms Spielpassung; Be provided with the ball annular groove between the hole wall of described axis hole and the shaft of valve rod, described aligning ball is arranged in the ball annular groove, the diameter of described aligning ball is less than the diameter of ball annular groove, and the number of aligning ball is at least three, and is uniformly distributed in the ball annular groove; The centre of sphere of aligning ball is positioned at same plane, and this plane is parallel with the shutoff face of valve seat.
Further, the gap between described axis hole and the valve rod is 0.2 ~ 0.5mm.
Further, described force application part is pneumatic actuator, and this pneumatic actuator comprises pneumatic piston, the stage clip that is arranged on hood inside and the handwheel that is arranged on the hood end; One end of described pneumatic piston is connected with handwheel, and the other end then is connected with the valve rod that stretches out valve gap by coaxial connector; Described compression spring sleeve is connected on the coaxial connector, and an end of stage clip contacts with the lower surface of pneumatic piston, and the supporting part that the other end and pneumatic actuator hood bottom arrange offsets.
Further, described pneumatic actuator is provided with switch indicator, is used to indicate the On/Off of spool and sealing surface of seat.
Further, described switch indicator comprises impression window and pointer, described displaying window is arranged on the sidewall of pneumatic actuator hood and comprises two kinds of signs of On/Off, described pointer is arranged on the valve rod that stretches out valve gap, be used to indicate the state of On/Off, the On/Off sign in the described impression window corresponds respectively to the On/Off state of spool and sealing surface of seat.
Compared with prior art, the present invention runs through valve seat with valve rod, and spool is arranged in the lower chamber of valve body, and the drive by force application part makes the upper surface of spool and the lower surface of valve seat, and namely the sealing surface of spool and valve seat fits tightly the realization shutoff.Since behind the MEDIA FLOW inlet valve body by shutoff in the lower chamber of valve body, can from valve body, not flow to the gap between valve rod and the valve gap, so when valve seat was in by sealed condition, except lower chamber and the spool of valve body can be subject to the pressure medium, the position relevant with valve gap can not be subject to this pressure.Medium also just can not occur and outwards reveal from the weakness sealing position of cut-off valve, whole device security is reliable.Simultaneously, when the parts of the present invention except being positioned at the valve seat lower chamber are carried out maintain and replace, do not need valve body taken apart medium is unstowed fully, effectively saved human resources, improved working efficiency.
Description of drawings
Fig. 1 is the prior art structural representation;
Fig. 2 is structural representation of the present invention.
Among the figure: 1, medium, 2, handwheel, 3, stage clip, 4, pneumatic piston, 5, pointer, 6, impression window, 7, stem packing, 8, valve rod, 9, lengthen valve gap, 10, the valve gap packing ring, 11, valve body, 12, valve seat, 13, spool, 14, the aligning ball, 15, mounting hole, 16, valve body lower cover, 17, the MEDIA FLOW entrance, 18, the MEDIA FLOW outlet, 19, upper cavity, 20, lower chamber, 21, pneumatic actuator.
Embodiment
Core thinking of the present invention is with the high in and low out state of cut-off valve from original medium, changes into the state of low in and high out.Imbody is in spool set position in valve body, and namely spool changes the present return-pressure type shutoff that is arranged in lower chamber into from originally being arranged in the push type shutoff of upper cavity.Such setting can make valve seat after being subject to the spool shutoff, and medium can not apply pressure medium to the parts relevant with valve gap, has avoided medium from weak parts such as valve gap and valve seal joint, valve gap and valve stem seal fillings to outward leakage.Effectively increased the Safety performance of cut-off valve.
In order to make those skilled in the art understand better technological scheme of the present invention, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 2, a kind of flowing medium cut-off valve comprises the valve rod 8 that is socketed with valve gap.Valve gap is provided with stem packing 7 for lengthening valve gap 9 between the shaft of lengthening valve gap 9 and valve rod 8, is used for sealing the gap that lengthens between valve gap 9 and the valve rod 8.An end that lengthens valve gap 9 is provided with force application part, and valve rod 8 is connected with force application part, and force application part can be with ovable valve stem 8 along lengthening valve gap 9 axial displacements.The other end that lengthens valve gap 9 is provided with valve body 11, lengthens to connect between valve gap 9 and the valve body 11 to be connected, and at the edge of connecting end, valve gap packing ring 10 is set between the surface of contact namely, forms the state that is tightly connected with this.Be provided with valve seat 12 in the cavity of valve body 11, this valve seat 12 is separated the MEDIA FLOW entrance 17 on the valve body 11 and MEDIA FLOW outlet 18, makes the inside of valve body 11 form two cavitys, is respectively upper cavity 19 and lower chamber 20.Wherein upper cavity 19 comprises MEDIA FLOW outlet 18, valve body 11 and the openings that lengthens valve gap 9; Lower chamber 20 comprises MEDIA FLOW entrance 17.One end of valve rod 8 stretches out and lengthens valve gap 9, stretches into simultaneously the inside of valve body 11, and passes successively upper cavity 19 and valve seat 12, is arranged at last the lower chamber 20 of valve body 11.Be provided with spool 13 in the end that is arranged in lower chamber 20 valve rods 8.By above-mentioned spool 13 in valve body 8 residing position as can be known, 13 pairs of valve seats of spool 12 carry out shutoff needs back pressure.That is to say that spool 13 makes its upper surface contact with the lower surface of valve seat 12 by the drive of force application part, and then form sealed condition, namely the lower surface of the upper surface of spool 13 and valve seat 12 is shutoff face.
In the present invention, because spool 13 is arranged in lower chamber 20, for the ease of the installation of spool 13, so valve body 11 is set to a four-way structure.This four-way structure comprises MEDIA FLOW entrance 17 and the MEDIA FLOW outlet 18 that is oppositely arranged, and the openings that is oppositely arranged and mounting hole 15, and this openings is connected with lengthening valve gap 9.The diameter of mounting hole 15 is greater than the diameter of spool.The step that spool 13 is installed is:
Step 2, valve rod 8 is stretched into upper cavity 19 and valve seat 12 successively, make the termination of valve rod 8 be arranged in lower chamber 20;
Step 3, valve rod 8 extend out to the outside of valve body 11 from mounting hole 15;
Step 4, run through the end of stretching out valve body 11 at valve rod 8 spool 13 is installed;
After step 5, the installation, retraction valve rod 8 is until make spool 13 be arranged in lower chamber 20;
Step 6, in mounting hole 15 sealing valve body lower cover 16 is set, spool 13 is sealed in the lower chamber 20.Wherein, mounting hole 15 and valve body lower cover 16 are connected by flange, and between mounting hole 15 and the valve body lower cover 16 for being tightly connected.
Another emphasis of the present invention is the linkage structure of spool 13 and valve rod 8.Specific as follows:
Because the length of valve rod 8 is longer, so when carrying out shutoff, valve rod 8 can not guarantee stable coaxality.Generally can have the deviation between 0.2 ~ 0.5mm.If according to the Connecting format that interfixes between valve rod in the prior art 8 and the spool 13, when valve rod 8 had certain deviation, spool 13 also inevitably can produce corresponding deviation.Because the position of valve seat 12 immobilizes in the valve body 11, in a single day deviation occurs spool 13 just can not carry out complete shutoff to valve seat 12, will inevitably cause harmful effect to the plugging effect of cut-off valve like this.
The present invention is directed to this problem and on the linkage structure of spool 13 and valve rod 8, also done corresponding improvement.Improved procedure is: between valve rod 8 and spool 13 aligning ball 14 is set, the connection by aligning ball 14 makes spool 13 form self-alignings with valve rod 8 and is flexibly connected, allow spool 13 can automatically adjust and valve seat 12 between the contact ratio of shutoff face.Solve by the skew of valve rod 8 with this and to cause the incomplete problem of shutoff.Concrete structure is as follows:
An axis hole is set in the central position of spool 13, the termination of valve rod 8 is arranged in this axis hole, and forms Spielpassung, this gap is stored in all opposing sides of axis hole and valve rod 8, be between the shaft of the hole wall of axis hole and valve rod 8, and at the bottom of the hole of axis hole and between the end face of valve rod 8.This gap length value is 0.2 ~ 0.5mm.
In order to make aligning ball 14 can be good at realizing the aligning effect, so between the shaft of the hole wall of axis hole and valve rod 8, be provided with the ball annular groove.Aligning ball 14 just is arranged in the ball annular groove.The diameter of aligning ball 14 must be the diameter less than the ball annular groove.In order to make the aligning effect stability of aligning ball 14, so the number of aligning ball 14 is set to three at least, and be uniformly distributed in the ball annular groove.The centre of sphere of a plurality of aligning balls 14 is positioned at same plane, the lower surface of this plane and valve seat, i.e. shutoff face keeping parallelism.
By the setting that the self-aligning between valve rod 8 and the spool 13 is flexibly connected, no matter whether valve rod 8 produces deviation, spool 13 and shutoff face between the valve seat 12 is reached fully overlap.That is to say that the adjusting by aligning ball 14 can make the upper surface of spool 13 reach fully with the lower surface of valve seat 12 and overlap.For the setting of aligning ball 14 numbers, can do concrete adjustment by the diameter of axis hole and valve rod 8.
In the present invention, force application part is set to pneumatic actuator 21, and this pneumatic actuator 21 can be with movable valve plug 13 to realize the return-pressure type shutoff by pneumatic piston 4 wherein, and its concrete structure is:
Pneumatic actuator 21 comprises hood, and the inside of hood is provided with pneumatic piston 4 and stage clip 3, and an end of hood is socketed in and lengthens on the valve gap 9, and the other end then is provided with handwheel 2.Pneumatic piston 4 one ends that are positioned at hood are connected with handwheel 2, and the other end is connected with valve rod 8 by coaxial connector, and this end valve bar 8 stretches out equally and lengthens valve gap 9.Stage clip 3 as elastic member is socketed on the coaxial connector.One end of stage clip 3 contacts with the lower surface of pneumatic piston 4, and the supporting part that the other end and pneumatic actuator 21 hoods bottom arrange offsets.The effect of supporting part is that when stage clip 3 compressive deformation, on the one hand firm stage clip 3 can not produce radial displacement, provides reaction force for stage clip 3 on the other hand.
In the present invention, operation handwheel 2 can be exerted pressure to stage clip 3.When the restoring force of stage clip 3 was maximum, the shutoff face of spool 13 and valve seat 12 was in the state of unlatching; When the restoring force of stage clip 3 reduced gradually, spool 13 moved to valve seat 12 gradually; When the restoring force of stage clip 3 hour, spool 13 is closed and is closely overlapped with the shutoff face of valve seat 12, to realize the purpose of shutoff.
In order to show intuitively that to operator the present invention is in the state of closing or opening, and is provided with switch indicator at pneumatic actuator 21.This switch indicator comprises an impression window 6 and a pointer 5.Wherein, impression window 6 is arranged on the sidewall of pneumatic actuator 21 hoods, comprises two kinds of signs of On/Off.5 on pointer is arranged on and stretches out on the valve rod 8 that lengthens valve gap 9, is used to indicate the state of On/Off.The On/Off that identifies in the impression window 6 corresponds respectively to opening state and the closed condition of spool 13 and valve seat 12.
Working principle of the present invention is: it is low in and high out that medium enters state of the present invention, so after spool 13 is with valve seat 12 shutoff, medium is because the effect meeting of high pressure is press-fit into from tank car in the valve body 11, and namely medium direction shown in the arrow from MEDIA FLOW entrance 17 inflow lower chamber 20(Fig. 2 is the inflow direction of medium).Because spool 13 is the return-pressure type shutoff, so medium only can rest in the lower chamber 20, and can not enter in the upper cavity 19.Just can not enter by the perforation end of valve body 11 in the gap that lengthens valve gap 9 and valve rod 8 yet.So just can avoid medium for the region of interest that lengthens valve gap 9, namely lengthen the seal washer of the connecting end of valve gap 9 and valve body 11, and the stem packing 7 that lengthens between valve gap 9 and valve rod 8 shafts applies pressure medium.Effectively eliminate when valve body 11 is in sealed condition the hidden danger of medium from the weak part of cut-off valve to outward leakage.
Only be preferred implementation of the present invention below, should be pointed out that above-mentioned preferred implementation should not be considered as limitation of the present invention, protection scope of the present invention should be as the criterion with the claim limited range.For those skilled in the art, without departing from the spirit and scope of the present invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a flowing medium cut-off valve comprises the valve rod that is socketed with valve gap, and an end of valve gap connects and is provided with valve body, and the surface of contact between valve gap and the valve body is tightly connected; The other end of valve gap is provided with force application part; Described valve inner is provided with valve seat, and valve seat is divided into upper cavity and lower chamber with valve body; Be sealed with stem packing between the shaft of described valve rod and the valve gap, an end of valve rod is connected with force application part, and force application part can drive valve rod axial displacement; It is characterized in that: the other end of valve rod passes upper cavity and the valve seat of valve inner successively, is arranged in lower chamber; The described valve rod end place that is positioned at lower chamber is provided with spool, and the lower surface of described valve seat and the upper surface of spool are shutoff face, but the drive of described spool by force application part makes its upper surface back pressure in the lower surface of valve seat, forms sealed condition.
2. flowing medium cut-off valve as claimed in claim 1, it is characterized in that: described valve body is the four-way structure, comprise the outlet of the MEDIA FLOW entrance that is oppositely arranged and MEDIA FLOW and the openings and the mounting hole that are oppositely arranged, this openings is connected with described valve gap, described mounting hole is provided with the valve body lower cover, is tightly connected between mounting hole and the valve body lower cover.
3. flowing medium cut-off valve as claimed in claim 2, it is characterized in that: the diameter of described valve body mounting hole is greater than the diameter of spool.
4. flowing medium cut-off valve as claimed in claim 1 is characterized in that: be provided with the aligning ball between described spool and the valve rod, spool and valve rod form self-aligning and are flexibly connected, and are used for adjusting the degree that overlaps of spool and valve seat shutoff face.
5. flowing medium cut-off valve as claimed in claim 4, it is characterized in that: the central position of described spool is provided with axis hole, and the termination of described valve rod is arranged in this axis hole and forms Spielpassung; Be provided with the ball annular groove between the hole wall of described axis hole and the shaft of valve rod, described aligning ball is arranged in the ball annular groove, the diameter of described aligning ball is less than the diameter of ball annular groove, and the number of aligning ball is at least three, and is uniformly distributed in the ball annular groove; The centre of sphere of aligning ball is positioned at same plane, and this plane is parallel with the shutoff face of valve seat.
6. flowing medium cut-off valve as claimed in claim 5, it is characterized in that: the gap between described axis hole and the valve rod is 0.2 ~ 0.5mm.
7. flowing medium cut-off valve as claimed in claim 1, it is characterized in that: described force application part is pneumatic actuator, this pneumatic actuator comprises pneumatic piston, the stage clip that is arranged on hood inside and the handwheel that is arranged on the hood end; One end of described pneumatic piston is connected with handwheel, and the other end then is connected with the valve rod that stretches out valve gap by coaxial connector; Described compression spring sleeve is connected on the coaxial connector, and an end of stage clip contacts with the lower surface of pneumatic piston, and the supporting part that the other end and pneumatic actuator hood bottom arrange offsets.
8. flowing medium cut-off valve as claimed in claim 7, it is characterized in that: described pneumatic actuator is provided with switch indicator, is used to indicate the On/Off of spool and sealing surface of seat.
9. flowing medium cut-off valve as claimed in claim 8, it is characterized in that: described switch indicator comprises impression window and pointer, described displaying window is arranged on the sidewall of pneumatic actuator hood and comprises two kinds of signs of On/Off, described pointer is arranged on the valve rod that stretches out valve gap, be used to indicate the state of On/Off, the On/Off sign in the described impression window corresponds respectively to the On/Off state of spool and sealing surface of seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103642792A CN102878304A (en) | 2012-09-26 | 2012-09-26 | Fluid medium stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103642792A CN102878304A (en) | 2012-09-26 | 2012-09-26 | Fluid medium stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102878304A true CN102878304A (en) | 2013-01-16 |
Family
ID=47479751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103642792A Pending CN102878304A (en) | 2012-09-26 | 2012-09-26 | Fluid medium stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102878304A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508707A (en) * | 2016-03-01 | 2016-04-20 | 马鞍山市润启新材料科技有限公司 | Valve stem |
| CN114439954A (en) * | 2021-12-09 | 2022-05-06 | 青岛精安医疗科技有限责任公司 | Flow regulating device and oxygenerator |
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|---|---|---|---|---|
| CN2384051Y (en) * | 1999-07-09 | 2000-06-21 | 夏海 | Low-temp bellows stop valve |
| CN2878818Y (en) * | 2006-04-12 | 2007-03-14 | 杨永祥 | Cut-off valve for rising stem |
| CN200946664Y (en) * | 2006-09-05 | 2007-09-12 | 浙江派沃自控仪表有限公司 | Pneumatic single base low temperature aluminum angle valve |
| CN201228801Y (en) * | 2008-04-06 | 2009-04-29 | 北京特种工程设计研究院 | Manual-pneumatic power integration low-temperature vacuum multilayer thermal insulation stop valve |
| CN201502719U (en) * | 2009-10-21 | 2010-06-09 | 浙江荣升机械有限公司 | Pneumatic two-position stop valve |
| CN201599414U (en) * | 2009-12-24 | 2010-10-06 | 中国航天科技集团公司第六研究院第十一研究所 | High pressure ultra-low temperature pneumatic controlled mushroom valve |
| CN201851675U (en) * | 2010-10-19 | 2011-06-01 | 陈亮 | Novel low-temperature disconnecting valve |
| CN202834105U (en) * | 2012-09-26 | 2013-03-27 | 成都欣国立低温科技有限公司 | Fluid medium block valve |
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2012
- 2012-09-26 CN CN2012103642792A patent/CN102878304A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2384051Y (en) * | 1999-07-09 | 2000-06-21 | 夏海 | Low-temp bellows stop valve |
| CN2878818Y (en) * | 2006-04-12 | 2007-03-14 | 杨永祥 | Cut-off valve for rising stem |
| CN200946664Y (en) * | 2006-09-05 | 2007-09-12 | 浙江派沃自控仪表有限公司 | Pneumatic single base low temperature aluminum angle valve |
| CN201228801Y (en) * | 2008-04-06 | 2009-04-29 | 北京特种工程设计研究院 | Manual-pneumatic power integration low-temperature vacuum multilayer thermal insulation stop valve |
| CN201502719U (en) * | 2009-10-21 | 2010-06-09 | 浙江荣升机械有限公司 | Pneumatic two-position stop valve |
| CN201599414U (en) * | 2009-12-24 | 2010-10-06 | 中国航天科技集团公司第六研究院第十一研究所 | High pressure ultra-low temperature pneumatic controlled mushroom valve |
| CN201851675U (en) * | 2010-10-19 | 2011-06-01 | 陈亮 | Novel low-temperature disconnecting valve |
| CN202834105U (en) * | 2012-09-26 | 2013-03-27 | 成都欣国立低温科技有限公司 | Fluid medium block valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508707A (en) * | 2016-03-01 | 2016-04-20 | 马鞍山市润启新材料科技有限公司 | Valve stem |
| CN114439954A (en) * | 2021-12-09 | 2022-05-06 | 青岛精安医疗科技有限责任公司 | Flow regulating device and oxygenerator |
| CN114439954B (en) * | 2021-12-09 | 2024-01-16 | 青岛精安医疗科技有限责任公司 | Flow regulating device and oxygenerator |
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Application publication date: 20130116 |