CN102829210A - High-temperature discharging valve - Google Patents
High-temperature discharging valve Download PDFInfo
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- CN102829210A CN102829210A CN2012102995960A CN201210299596A CN102829210A CN 102829210 A CN102829210 A CN 102829210A CN 2012102995960 A CN2012102995960 A CN 2012102995960A CN 201210299596 A CN201210299596 A CN 201210299596A CN 102829210 A CN102829210 A CN 102829210A
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Abstract
The invention discloses a high-temperature discharging valve which comprises a valve body part, a driving part and a radiating part, wherein the valve body part is used for circulating or stopping a high-temperature medium; the valve body part comprises a valve body and a hemispheroid; a runner is arranged on the middle part of the valve body; the hemispheroid can rotate relative to the valve body in the valve body and can selectively seal or open the runner; the driving part is used for driving the hemispheroid to rotate; the driving part comprises an upper valve rod which synchronously rotates with the hemispheroid; one end of the upper valve rod passes through the valve body and is connected with the hemispheroid; the radiating part comprises a radiating bracket, a filler and an end cover; the radiating bracket is sleeved on the upper valve rod; one end of the radiating bracket is in sealing connection with the valve body; the filler is arranged in a sealing space between the radiating bracket and the upper valve rod; and the filler is tightly pressed by the end cover from the other end of the radiating bracket. The heat transferred by the valve body is quickly radiated by the radiating bracket, so that the use performance and the service life of the upper valve rod and the whole driving part are protected, and the high-temperature discharging valve has the advantage of excellent heat radiating property.
Description
Technical field
The present invention relates to a kind of high temperature discharge valve.
Background technique
Discharge valve is a kind of industries such as oil, chemical industry, rock gas that are widely used in, be used for the circulation of control media on pipeline, dam, regulate, etc. the equipment of function.Conventional discharge valve is in order to reach intact sealability; Its sealing material mostly adopts the soft seal form of plastics; The discharge valve of this soft seal type can only use under the operating mode of normal temperature; And plastic seal ring itself very easily receives the erosion or the scratch of the flowing medium on the pipeline, reduced sealing effect or sealability is completely lost, and its temperature using scope and the equal strictness of use occasion are restricted; The discharge valve of hard seal type uses under the high temperature occasion of harshness, and poor because of heat dispersion easily, the untimely structural failure that causes of heat radiation makes the usability of discharge valve reduce greatly.
Summary of the invention
The invention provides a kind of high temperature discharge valve of perfect heat-dissipating, it has overcome the existing deficiency of background technique.The technological scheme that is adopted that the present invention solves its technical problem is:
A kind of high temperature discharge valve comprises:
The valve body part that is used to make the high temperature media circulation or dams, this valve body branch comprise the middle part be provided with the valve body of runner and can in this valve body, relatively rotate with it, hemisphere that selectively this runner is ended or opened to envelope;
Be used to drive the drive part that this hemisphere rotates, this drive part comprises the upper valve rod that rotates synchronously with this hemisphere, and an end of this upper valve rod passes this valve body and is connected with this hemisphere;
Radiator portion; This radiator portion comprises cooling stand, filler and end cap; This cooling stand is nested with on this upper valve rod; One end of this cooling stand is connected with this valve seal, and this filler places in the seal space of this cooling stand and this upper valve rod, and this end cap compresses this filler from the other end of this cooling stand.
Among one preferred embodiment: several cooling fins is set on the sidewall of this cooling stand at interval.
Among one preferred embodiment: be provided with gasket seal between this cooling stand and this valve body.
Among one preferred embodiment: this cooling stand is connected with this valve body through fastener assembly; This fastener assembly comprises bolt, nut and belleville spring; This bolt one end is connected with this valve body; This bolt the other end passes this cooling stand, and this nut screwing clamping is at the other end of this bolt, and this belleville spring is arranged between this cooling stand and this nut.
Among one preferred embodiment: this valve body comprises sidewall and the cooling jacket along whole circumferential setting; This cooling jacket is positioned at the outside of this sidewall; This sidewall surrounds said runner, and this cooling jacket and this sidewall surround cooling water chamber, and this cooling jacket is provided with import and outlet.
Among one preferred embodiment: this drive part also comprises control mechanism, stretches out the rotating shaft and the compensation connecting sleeve of this control mechanism; This compensation connecting sleeve connects the other end and this rotating shaft of this upper valve rod; This rotating shaft, this compensation connecting sleeve and this upper valve rod rotate synchronously, form a spacing between this compensation connecting sleeve and this control mechanism.
Among one preferred embodiment: this compensation connecting sleeve is provided with the first hole section and the second hole section of connection, and this rotating shaft is connected in this first hole section, and this upper valve rod is connected in this second hole section, forms a spacing between this upper valve rod and this rotating shaft.
Among one preferred embodiment: this drive part also comprises driving arm, and this driving arm connects the other end and this control mechanism of this cooling stand, and this compensation connecting sleeve is arranged in this driving arm.
Among one preferred embodiment: be provided with asbestos gauge between this cooling stand and this driving arm.
Among one preferred embodiment: this cooling stand is connected with this driving arm through said fastener assembly; This bolt one end is connected with this cooling stand; This bolt the other end passes this driving arm; This nut screwing clamping is at the other end of this bolt, and this belleville spring is arranged between this driving arm and this nut.
Among one preferred embodiment: this valve body is provided with upper bearing (metal), and this upper valve rod passes this upper bearing (metal) and is connected with this hemisphere.
Among one preferred embodiment: this drive part also comprises lower valve rod, and this lower valve rod one end is fixed on this valve body, and this hemisphere is provided with lower bearing, and this lower valve rod the other end is articulated in this lower bearing, and this lower valve rod is forged by the SS310S material and forms.
Among one preferred embodiment: this valve body part also comprises the valve seat that is arranged on this flow passage entry; The end of this valve seat towards this valve body center is provided with whole circle sealing surface; This hemisphere is provided with the whole face that is sealed and matched that encloses; The sealing fitting surface is connected with sealing face liquid sealing when damming, and the sealing fitting surface exceeds this hemispheroidal sphere.
Among one preferred embodiment: the surface spraying CrC of sealing face and sealing fitting surface.
Among one preferred embodiment: this valve body and this hemisphere are formed by the casting of ZG40Cr25Ni20 material, and this upper valve rod and this valve seat are forged by the SS310S material and form.
The present technique scheme is compared with background technique, and it has following advantage:
1. an end of this cooling stand is connected with this valve seal, and this end cap compresses this filler from the other end of this cooling stand, realizes the sealing effect of zero leakage between this upper valve rod and this cooling stand; The heat that this cooling stand is uploaded this valve body conducts rapidly, has protected the usability and the life-span of this upper valve rod and whole drive part, makes this high temperature discharge valve have the advantage of perfect heat-dissipating.
2. at interval several cooling fins is set on the sidewall of this cooling stand, the heat that can more quickly and efficiently this valve body be uploaded through said radiating fin conducts.
3. be provided with gasket seal between this cooling stand and this valve body, further strengthen the sealing function between this cooling stand and this valve body, prevent leaking of medium, guarantee the safety operation of this discharge valve.
4. this belleville spring is arranged between this cooling stand and this nut, makes this discharge valve in operating process, play stop, locking and compensation vibrations and the function in the gap that produces, has guaranteed that the long-term safety of this discharge valve is used.
5. this cooling jacket and this sidewall surround cooling water chamber; This cooling jacket is provided with import and outlet; Through the continuous circulation of cooling water, realize direct cooling action, to guarantee the cooling-down effect of this discharge valve in whole operation to this valve body; Play the function of keeping the safety in production and increasing the service life, greatly improved the heat dispersion of this discharge valve.
6. should compensate and form a spacing between connecting sleeve and this control mechanism; Prevent that effectively this upper valve rod from making this compensation connecting sleeve withstand this control mechanism because of the influence that receives high temperature produces the distortion lengthening in the course of the work; And then heat is reached this control mechanism cause its inner body to damage and influence its working life, the effect that can play the protection control mechanism and prolong its working life.
7. form a spacing between this upper valve rod and this rotating shaft; Prevent that effectively this rotating shaft from making this commentaries on classics withstand this upper valve rod because of receiving temperatures involved to produce the distortion lengthening in the course of the work; And then heat is reached this control mechanism cause its inner body to damage and influence its working life, the effect that can play the protection control mechanism and prolong its working life.
8. this compensation connecting sleeve is arranged in this driving arm, plays the effect of safety in production.
9. be provided with asbestos gauge between this cooling stand and this driving arm, realize that heat can't be passed to the perfect effect of heat insulation of this control mechanism through this driving arm, has prolonged the working life of this control mechanism to the utmost.
10. this belleville spring is arranged between this driving arm and this nut, makes this discharge valve in operating process, play stop, locking and compensation vibrations and the function in the gap that produces, has guaranteed that the long-term safety of this discharge valve is used.
11. this valve body is provided with upper bearing (metal), this upper valve rod passes this upper bearing (metal) and is connected with this hemisphere, and this upper valve rod can rotate in this upper bearing (metal), slide freely, realizes the effect that operation torsion reduces greatly.
12. this drive part also comprises lower valve rod; This lower valve rod is arranged on this valve body; This hemisphere is provided with lower bearing, and this lower valve rod is articulated in this lower bearing, further makes this hemisphere have rotation advantage freely; This lower valve rod is forged by the SS310S material and forms, and the long-term safety that can satisfy under the harsh working condition of 800～1150 ℃ of superhigh temperature scopes is used.
13. the sealing fitting surface is connected with sealing face liquid sealing when damming; Because the sealing fitting surface exceeds this hemispheroidal sphere; In closing closed procedure; The sealing fitting surface can be wiped the granule medium on the sealing face effectively, and the phenomenon that prevents to get stuck takes place, and it is smooth to guarantee that this hemisphere is closed tight and next unlatching.
14. the surface of sealing face and sealing fitting surface spraying CrC; Its anticorrosive, wear-resisting superior physics, chemical property that undermines high hardness (reaching more than the HRC70) can satisfy in superhigh temperature, have safe handling under corrosivity or the extremely strong abominable working condition, and its sealability is superior.
15. this valve body and this hemisphere are formed by the casting of ZG40Cr25Ni20 material, this upper valve rod and this valve seat are forged by the SS310S material and form, and the long-term safety that can satisfy under the harsh working condition of 800～1150 ℃ of superhigh temperature scopes is used.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 has illustrated the partial schematic sectional view of a kind of high temperature discharge valve of the present invention.
Fig. 2 illustrates along the cross-sectional schematic of A-A line among Fig. 1.
Fig. 3 has illustrated the enlarged view at B place among Fig. 2.
Fig. 4 has illustrated the partial schematic sectional view of high temperature discharge valve opening state shown in Figure 1.
Fig. 5 has illustrated the schematic representation of the hemisphere opening process of high temperature discharge valve shown in Figure 1.
Embodiment
Please refer to Fig. 1, a kind of high temperature discharge valve 100 of the present invention comprises: one is used to make the high temperature media circulation or radiator portion 20 and that the valve body part 10, of damming is used for distribute heat is used to drive the drive part 30 of these valve body part 10 actions.This drive part 30, this radiator portion 20, this valve body part 10 set gradually from top to bottom.
Please with reference to Fig. 1 and Fig. 2, this valve body part 10 comprises a valve body 12, a hemisphere 14 and a valve seat 16.The middle part of this valve body 12 is laterally run through and is provided with a runner 122, and medium flows through this runner 122 from left to right.This valve body 12 comprises sidewall 124 and the cooling jacket 126 along whole circumferential setting.This sidewall 124 surrounds said runner 122.This cooling jacket 126 is positioned at the outside of this sidewall 124.This cooling jacket 126 surrounds a cooling water chamber 128 with this sidewall 124.This cooling jacket 126 is provided with an import 1262 and an outlet 1264, and cooling water can be input to this cooling water chamber 128 from this import 1262, discharges from this outlet 1264, thereby directly this valve body 12 is dispelled the heat.The top of this valve body 12 embeds a upper bearing (metal) 121 is set.This valve body 12 forms (ZG40Cr25Ni20 is meant boiler with corrosion-resistant, resistant to elevated temperatures stainless steel, has the performance of the long-term safety use that can satisfy under the harsh working condition of 800～1150 ℃ of scopes) by the casting of ZG40Cr25Ni20 material.
Please with reference to Fig. 2 and Fig. 3, this valve seat 16 is arranged on the ingress of this runner 122.The end of this valve seat 16 towards these valve body 12 centers is provided with whole circle sealing surface 162.The surface by utilizing supersonic spray coating technology of sealing face 162 is coated with CrC (CrC is meant chromium carbide, and hardness reaches more than the HRC70).This valve seat is forged by the SS310S material and forms that (SS310S is meant boiler with corrosion-resistant, resistant to elevated temperatures stainless steel, has the performance of the long-term safety use that can satisfy under the harsh working condition of 800～1150 ℃ of scopes.ZG40Cr25Ni20 is identical with the chemical composition of SS310S, and difference is the mode of casting and forging).
Please referring to figs. 1 through Fig. 3, this hemisphere 14 can rotate, also only selectively seal or open this runner 122 in this valve body 12.This hemisphere 14 is provided with the whole face 142 that is sealed and matched that encloses, and sealing fitting surface 142 is connected with sealing face 162 liquid sealings when damming, and envelope is stopped this runner 122.After this hemisphere 14 rotated along counter clockwise direction, sealing fitting surface 142 separated with sealing face 162, and this runner 122 is opened.Sealing fitting surface 142 exceeds the sphere 144 of this hemisphere 14.The surface by utilizing supersonic spray coating technology of sealing fitting surface 142 is coated with CrC (CrC is meant chromium carbide, and hardness reaches more than the HRC70).The bottom of this hemisphere 14 embeds a lower bearing 141 is set.This lower bearing 141 is coaxial with this upper bearing (metal) 121.This hemisphere 14 is formed by the casting of ZG40Cr25Ni20 material.
Please with reference to Fig. 1 and Fig. 2, this radiator portion 20 comprises a cooling stand 22, a filler 24 and an end cap 26.This cooling stand 22 is processed by the material of perfect heat-dissipating, and several cooling fins 222 is set on its sidewall at interval.
This drive part 30 is used to drive this hemisphere 14 and rotates.This drive part 30 comprises that a upper valve rod 31, a control mechanism 32, stretch out rotating shaft 33, compensation connecting sleeve 34, a driving arm 35 and a lower valve rod 36 of this control mechanism 32.This control mechanism 32 drives this rotating shaft 33 and rotates.This compensation connecting sleeve 34 is provided with the one first hole section 342 and the one second hole section 344 of connection.This rotating shaft 33 is connected in this first hole section 342 through flat key.The upper end of this upper valve rod 31 is connected in this second hole section 344, and the cross section of the upper end of this upper valve rod 31 is square, thereby makes the Placement that forms the right angle square key between this upper valve rod 31 and this compensation connecting sleeve 34.Like this, this rotating shaft 33, this compensation connecting sleeve 34 and this upper valve rod 31 just can rotate synchronously.Form a spacing 38 between this upper valve rod 31 and this rotating shaft 33, this spacing 38 can prevent this rotating shaft 33 elongated backs and these upper valve rod 31 butts.Form a spacing 37 between this compensation connecting sleeve 34 and this control mechanism 32, this spacing 37 can prevent these upper valve rod 31 elongated promotions this compensation connecting sleeve 34 and these control mechanism 32 butts.This compensation connecting sleeve 34 is arranged in this driving arm 35.The upper end of this driving arm 35 is connected with this control mechanism 32.
The upper bearing (metal) 121 that this valve body 12 is passed in the lower end of this upper valve rod 31 is connected with this hemisphere 14, adopts the Placement of spline to be connected between this upper valve rod 31 and this hemisphere 14; This cooling stand 22 is nested with on this upper valve rod 31, and the lower end of this cooling stand 22 and this valve body 12 are tightly connected, and is provided with a resistant to elevated temperatures gasket seal 21 between this cooling stand 22 and this valve body 12; This cooling stand 22 is connected with this valve body 12 through some groups of fastener assemblies 23.This fastener assembly 23 comprises a bolt 232, a nut 234 and a dish-shaped spring 236.The lower end of this bolt 232 is connected with this valve body 12, and this cooling stand 22 is passed in these bolt 232 upper ends, and this nut 234 is tightened in the upper end of this bolt 232, and this belleville spring 236 is arranged between this cooling stand 22 and this nut 234; This filler 24 places in the seal space 25 of this cooling stand 22 and this upper valve rod 31, and this end cap 26 compresses this filler 24 from the upper end of this cooling stand 22; The upper end of this cooling stand 22 is connected with the lower end of this driving arm 35, is provided with a resistant to elevated temperatures asbestos gauge 27 between this cooling stand 22 and this driving arm 35; This cooling stand 22 is connected with this driving arm 35 through some groups of fastener assemblies 23 equally.The lower end of this bolt 232 is connected with this cooling stand 22, and this driving arm 35 is passed in these bolt 232 upper ends, and this nut 234 is tightened in the upper end of this bolt 232, and this belleville spring 236 is arranged between this driving arm 35 and this nut 234 (as shown in Figure 4); These lower valve rod 36 lower ends are fixedly installed on the bottom of this valve body 12, and these lower valve rod 36 upper ends are articulated in this lower bearing 141.This upper valve rod 31 is forged by the SS310S material with this lower valve rod 36 and forms.
Please with reference to Fig. 4 and Fig. 5, when opening this runner 122, this control mechanism 32 drives this rotating shaft 33 and rotates counterclockwise; This rotating shaft 33 drives this compensation connecting sleeve 34 and rotates counterclockwise synchronous rotation; This compensation connecting sleeve 34 drives this upper valve rod 31 and rotates counterclockwise synchronous rotation; This upper valve rod 31 drives this hemisphere 14 and rotates counterclockwise synchronous rotation; Sealing fitting surface 142 separates with sealing face 162.
The above is merely preferred embodiment of the present invention, so can not limit the scope that the present invention implements according to this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that the present invention contains.
Claims (15)
1. high temperature discharge valve comprises:
The valve body part that is used to make the high temperature media circulation or dams, this valve body branch comprise the middle part be provided with the valve body of runner and can in this valve body, relatively rotate with it, hemisphere that selectively this runner is ended or opened to envelope;
Be used to drive the drive part that this hemisphere rotates, this drive part comprises the upper valve rod that rotates synchronously with this hemisphere, and an end of this upper valve rod passes this valve body and is connected with this hemisphere;
It is characterized in that it also comprises:
Radiator portion; This radiator portion comprises cooling stand, filler and end cap; This cooling stand is nested with on this upper valve rod; One end of this cooling stand is connected with this valve seal, and this filler places in the seal space of this cooling stand and this upper valve rod, and this end cap compresses this filler from the other end of this cooling stand.
2. a kind of high temperature discharge valve according to claim 1 is characterized in that: several cooling fins is set on the sidewall of this cooling stand at interval.
3. a kind of high temperature discharge valve according to claim 2 is characterized in that: be provided with gasket seal between this cooling stand and this valve body.
4. a kind of high temperature discharge valve according to claim 3; It is characterized in that: this cooling stand is connected with this valve body through fastener assembly; This fastener assembly comprises bolt, nut and belleville spring, and this bolt one end is connected with this valve body, and this bolt the other end passes this cooling stand; This nut screwing clamping is at the other end of this bolt, and this belleville spring is arranged between this cooling stand and this nut.
5. a kind of high temperature discharge valve according to claim 4; It is characterized in that: this valve body comprises sidewall and the cooling jacket along whole circumferential setting; This cooling jacket is positioned at the outside of this sidewall; This sidewall surrounds said runner, and this cooling jacket and this sidewall surround cooling water chamber, and this cooling jacket is provided with import and outlet.
6. a kind of high temperature discharge valve according to claim 5; It is characterized in that: this drive part also comprises control mechanism, stretches out the rotating shaft and the compensation connecting sleeve of this control mechanism; This compensation connecting sleeve connects the other end and this rotating shaft of this upper valve rod; This rotating shaft, this compensation connecting sleeve and this upper valve rod rotate synchronously, form a spacing between this compensation connecting sleeve and this control mechanism.
7. a kind of high temperature discharge valve according to claim 6; It is characterized in that: this compensation connecting sleeve is provided with the first hole section and the second hole section of connection; This rotating shaft is connected in this first hole section, and this upper valve rod is connected in this second hole section, forms a spacing between this upper valve rod and this rotating shaft.
8. a kind of high temperature discharge valve according to claim 7, it is characterized in that: this drive part also comprises driving arm, and this driving arm connects the other end and this control mechanism of this cooling stand, and this compensation connecting sleeve is arranged in this driving arm.
9. a kind of high temperature discharge valve according to claim 8 is characterized in that: be provided with asbestos gauge between this cooling stand and this driving arm.
10. a kind of high temperature discharge valve according to claim 9; It is characterized in that: this cooling stand is connected with this driving arm through said fastener assembly; This bolt one end is connected with this cooling stand; This bolt the other end passes this driving arm, and this nut screwing clamping is at the other end of this bolt, and this belleville spring is arranged between this driving arm and this nut.
11. a kind of high temperature discharge valve according to claim 10, it is characterized in that: this valve body is provided with upper bearing (metal), and this upper valve rod passes this upper bearing (metal) and is connected with this hemisphere.
12. a kind of high temperature discharge valve according to claim 11; It is characterized in that: this drive part also comprises lower valve rod; This lower valve rod one end is fixed on this valve body; This hemisphere is provided with lower bearing, and this lower valve rod the other end is articulated in this lower bearing, and this lower valve rod is forged by the SS310S material and forms.
13. according to each described a kind of high temperature discharge valve in the claim 1 to 12; It is characterized in that: this valve body part also comprises the valve seat that is arranged on this flow passage entry; The end of this valve seat towards this valve body center is provided with whole circle sealing surface; This hemisphere is provided with the whole face that is sealed and matched that encloses, and the sealing fitting surface is connected with sealing face liquid sealing when damming, and the sealing fitting surface exceeds this hemispheroidal sphere.
14. a kind of high temperature discharge valve according to claim 13 is characterized in that: the surface spraying CrC of sealing face and sealing fitting surface.
15. a kind of high temperature discharge valve according to claim 13 is characterized in that: this valve body and this hemisphere are formed by the casting of ZG40Cr25Ni20 material, and this upper valve rod and this valve seat are forged by the SS310S material and form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102995960A CN102829210A (en) | 2012-08-22 | 2012-08-22 | High-temperature discharging valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102995960A CN102829210A (en) | 2012-08-22 | 2012-08-22 | High-temperature discharging valve |
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|---|---|
| CN102829210A true CN102829210A (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102995960A Pending CN102829210A (en) | 2012-08-22 | 2012-08-22 | High-temperature discharging valve |
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| CN (1) | CN102829210A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103375604A (en) * | 2013-07-23 | 2013-10-30 | 浙江石化阀门有限公司 | Superhigh temperature rigidity seal ball valve |
| CN109268529A (en) * | 2018-11-06 | 2019-01-25 | 江苏高特阀业有限公司 | A kind of pneumatic high temperature resistant rotary-cutting type V-arrangement valve |
| CN109681662A (en) * | 2019-01-17 | 2019-04-26 | 宣达实业集团有限公司 | Upper dress superhigh temperature ball valve |
| CN110608296A (en) * | 2019-09-11 | 2019-12-24 | 昆山维萨阀门股份有限公司 | Hemispherical metal sealing fixed ball valve with jacket |
| CN110925472A (en) * | 2019-11-19 | 2020-03-27 | 张家港宏昌钢板有限公司 | Automatic blowdown device for heating furnace |
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| CN103375604A (en) * | 2013-07-23 | 2013-10-30 | 浙江石化阀门有限公司 | Superhigh temperature rigidity seal ball valve |
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| CN109268529A (en) * | 2018-11-06 | 2019-01-25 | 江苏高特阀业有限公司 | A kind of pneumatic high temperature resistant rotary-cutting type V-arrangement valve |
| CN109681662A (en) * | 2019-01-17 | 2019-04-26 | 宣达实业集团有限公司 | Upper dress superhigh temperature ball valve |
| CN109681662B (en) * | 2019-01-17 | 2024-04-23 | 宣达实业集团有限公司 | Top-mounted ultra-high temperature ball valve |
| CN110608296A (en) * | 2019-09-11 | 2019-12-24 | 昆山维萨阀门股份有限公司 | Hemispherical metal sealing fixed ball valve with jacket |
| CN110925472A (en) * | 2019-11-19 | 2020-03-27 | 张家港宏昌钢板有限公司 | Automatic blowdown device for heating furnace |
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Application publication date: 20121219 |