CN204025778U - A kind of cut-off non-return plunger type sampling valve - Google Patents
A kind of cut-off non-return plunger type sampling valve Download PDFInfo
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- CN204025778U CN204025778U CN201420488014.8U CN201420488014U CN204025778U CN 204025778 U CN204025778 U CN 204025778U CN 201420488014 U CN201420488014 U CN 201420488014U CN 204025778 U CN204025778 U CN 204025778U
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Abstract
A kind of cut-off non-return plunger type sampling valve, comprise valve body, head becomes the flap of T-shaped, valve rod, operating device, valve body front portion is provided with stream chamber and the steam inlet relative to these both sides, stream chamber, sampling outlet, the head of this flap is arranged in stream chamber slippingly, be sealed and matched in slip between the afterbody of flap and valve body, form flap to coordinate with the keying of valve seat, flap front end is installed with sealing valve pad, the head end of valve rod is connected in the root of flap and becomes with flap coaxial linkage to coordinate, sample tap connects sample tap control valve, valve body rear portion is provided with valve gap, valve body comprises the valve body in band stream chamber, and be positioned at the valve seat pipe of front end, described stream chamber, valve seat pipe is detachably arranged on valve body front end, valve seat pipe has the feed pathway be communicated with stream chamber, the feed pathway that valve seat is located at valve seat pipe is connected on the port of one end with stream chamber.Compared with prior art, have and check dismounting and change sealing valve pad conveniently, maintaining is advantage easily for the utility model.
Description
Technical field
The utility model relates to valve technology field, is specifically related to a kind of sampling cock for biological fermentation tank or experimental tank.
Background technique
Traditional sampling cock being applied to biological fermentation tank or experimental tank includes with fermenting tub or tests tank connected valve and be connected with high-temperature steam for the steam valve of sterilization and the sample cock for sampling, there is valve many, sealing is poor, and there is sterilizing dead angle in overall sampling cock valve inner joint place, make in sampling cock, to be subject to right fungi pollution, bring heavy losses, in addition, traditional sampling cock does not possess anti-theft feature, makes the stolen loss of precious bacterial classification in fermenting tub or experimental tank.
For this reason, publication number disclosed in 9 days June in 2010 is a kind of cut-off non-return plunger-type anti-theft sampling valve of Chinese utility model patent of CN201503360U, include valve body, flap, valve rod, operating device, described valve body is provided with liquid inlet, steam inlet, sampling outlet, described liquid inlet is arranged at the front portion of valve body, described valve body is provided with stream chamber relative to the inner side of liquid inlet, the front end in this stream chamber is provided with valve seat, the head of described flap becomes T shape, and the head of this flap is arranged in stream chamber slippingly, be sealed and matched in slip between the afterbody of described flap and valve body, form flap to coordinate with the keying of valve seat, described steam inlet and sampling outlet are arranged at the both sides relative to this stream chamber on valve body respectively, described flap front end is fixedly installed the sealing valve pad with valve base sealing adaptation, the head end of described valve rod is connected in the root of flap and becomes with flap coaxial linkage to coordinate, described operating device is connected in the afterbody of valve rod and is linked with it, valve rod swivel nut is provided with between described valve body and valve rod, described valve rod and valve rod swivel nut helical rotation move, the front end of this valve rod swivel nut is provided with stuffing box gland, sample tap is connected with sample tap control valve, be provided with steam pipe joint at steam-gas inlet, steam pipe joint is relative to being connected the other end of one end with steam-gas inlet with pipe end flange dish.
But its sample tap control valve adopts one way stop peturn valve, rely on look nut and pressure adjusting spring to realize hoisting capacity and control, this structure exists in steam disinfection process, and vapor tension is large, and washing open easily by sample tap control valve, causes the problem of valve invalidation; Therefore on June 25th, 2010, disclosed publication number is a kind of two stop anti-theft sampling valve (as shown in Figure 1) of the Chinese utility model patent of CN 201706007U, sample tap control valve is adopted stop valve design, the direct screw thread of stop valve spool screws in stop valve body, and arranges handwheel in one end that cut-off spool stretches out stop valve body and open and close operation for the lifting controlling to end spool.
Due to the particularity of bio-fermentation process, require that whether often criticize the sealing valve pad that all will check on flap damages, in case the situation of microbiological contamination occurs and impact production, therefore will dismantle sampling cock inspection.No matter be publication number be sampling cock in the earlier application of CN201503360U, or publication number is the sampling cock of the later application of CN 201706007U, all exist because valve seat is directly formed in the stream chamber of valve body, during dismounting, need the valve gap first opening valve rear end, then take out valve rod, seal ring, flap one by one and just can carry out the inspection of sealing valve pad or replacing.And then reinstall piece by piece, whole process wastes time and energy, and in being dismounted for multiple times process, also easily causes the damage of other O-ring seals, affects the sealing effect of valve gap.
Meanwhile, also there is following defect: its valve gap is with bolts on valve body, there is dismounting and assembling inconvenience.
Steam pipe joint is that global formation is fixed on the steam orifice of valve body, there is steam pipe joint and easily damages, need whole scrapping during damage, and causes inconvenient maintenance and maintenance cost to increase.
And, for the later application (as shown in Figure 1) that publication number is CN 201706007U, structure after its sample tap control valve improves, though solve the problem of valve safety reliability, but due to handwheel and spool integrally manufactured shaping, therefore handwheel is also made for the metal same with spool, therefore scalds one's hand when sterilization, not easily open and close, easily produce scald accident.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of dissembling inspection and change sealing valve pad convenient, and maintaining is cut-off non-return plunger type sampling valve easily.
For achieving the above object, the utility model provides following technological scheme: a kind of cut-off non-return plunger type sampling valve, include valve body, flap, valve rod, operating device, described valve body front portion is provided with stream chamber, valve body rear portion is provided with valve gap, the front end in described stream chamber is provided with valve seat, the head of described flap becomes T shape, the head of this flap is arranged in stream chamber slippingly, be sealed and matched in slip between the afterbody of described flap and valve body, form flap to coordinate with the keying of valve seat, described flap front end is fixedly installed the sealing valve pad with valve base sealing adaptation, the head end of described valve rod is connected in the root of flap and becomes with flap coaxial linkage to coordinate, described operating device is connected to the afterbody of valve rod and is linked with it, valve body is provided with steam inlet relative to the both sides in this stream chamber, sampling outlet, sample tap is connected with sample tap control valve, it is characterized in that: described valve body comprises the valve body being with described stream chamber, and be positioned at the valve seat pipe of front end, described stream chamber, described valve seat pipe is detachably arranged on valve body front end, described valve seat pipe has the feed pathway be communicated with described stream chamber, the feed pathway that described valve seat is located at described valve seat pipe is connected on the port of one end with described stream chamber.
By adopting technique scheme, valve body adopts main body and valve seat pipe detachably to assemble formation, valve seat is arranged on valve seat pipe, when checking and change sealing valve pad, only valve seat pipe need be disassembled from valve body, stream chamber can be opened, flap exposes, complete and flap upper sealing valve pad is checked or changed, thus reach maintaining effect easily; And, assemble after parts processing, can difficulty of processing be reduced.
The utility model is set to further: described valve body and valve seat pipe adopt quick coupling structure to be connected;
Described quick coupling structure comprises a pair mounting flange with annular flange flange, and the clip of the two mounting flange upper annular flange that are clamped and connected, and is folded with sealing gasket between the end face of flange of two mounting flanges.
By adopting technique scheme, realizing valve body and valve seat pipe fast assembling-disassembling, substantially reducing the time of dismounting, bring convenience to maintaining; And quick coupling structure is simple, durable.
The utility model is set to further: the end face of flange of described two mounting flanges offers O-ring seal locating slot, and the both ends of the surface of described sealing gasket are provided with the adaptive circular orientation projection embedded in O-ring seal locating slot.
By adopting technique scheme, realizing sealing gasket position and installing accurately and reliably, meanwhile, circular orientation projection and O-ring seal locating slot, form one ring packing, improve sealability.
The utility model is set to further: described valve gap and valve body adopt quick coupling structure to be connected.
By adopting technique scheme, facilitate the dismounting of valve gap and valve body.
The utility model is set to further: described steam-gas inlet is provided with steam pipe joint, steam pipe joint comprises the first pipe joint be fixedly connected on steam-gas inlet, and the second pipe joint to be connected with the first pipe joint, described first pipe joint adopts quick coupling structure to be connected with between the second pipe joint, and described second pipe joint is provided with pipe end flange dish relative to the other end being connected one end with the first pipe joint.
By adopting technique scheme, steam pipe joint being adopted sectional design, facilitates steam pipe joint to be assemblied on valve body, and the first pipe joint and valve body are fixed, second pipe joint and the second pipe joint fast demountable, can realize segmentation maintenance maintenance, maintain easily and reduce costs.
The utility model is set to further: described sample tap control valve is stop valve, include stop valve body and stop valve spool, stop valve body is provided with stop valve stream chamber relative to the inner side of sampling outlet, stop valve stream chamber is provided with seat of stop valve with the sampling outlet place of being conducted, seal in slip between stop valve spool and stop valve body and arrange, helically be rotatably assorted between stop valve spool and stop valve body, the keying forming stop valve spool and seat of stop valve coordinates, one end that stop valve spool is linked with seat of stop valve is head end, the other end is the tail end passing stop valve body, stop valve valve core inside offers the material channel passed through for material, material channel includes material inlet and material outlet, material inlet is positioned at the rear of stop valve spool head end and is conducted with stop valve stream chamber, material outlet is positioned at the tail end of stop valve spool and is conducted with space outerpace, the part that described stop valve spool passes stop valve body is detachably provided with handwheel,
Described handwheel is the bakelite handwheel that bakelite material is made.
By adopting technique scheme, when needs discharging, only needing steam off import, removing the sealing of flap and stop valve spool respectively, make liquid inlet, stream chamber, stop valve stream chamber and material channel mutual conduction, thus form the passage of material process, when carrying out moise-heat sterilization, by revolving stop valve spool, its head end and seat of stop valve are formed to be sealed and matched, sealing is good, even if the bearing value that the pressure that steam inlet enters exceedes existing cut-off non-return plunger-type anti-theft sampling valve also can not cause stop valve spool to be opened, thus prevent sterilisation vapour punching press from causing stop valve to loosen inefficacy, stop valve spool detachably installs handwheel, can realize handwheel adopts the material being different from stop valve spool to make, process more convenient, the handwheel assembling that respective material is made can be carried out on demand, more flexible, and adopt bakelite material to make handwheel, there is higher mechanical strength, good insulating properties, heat-resisting, corrosion-resistant, scald accident can be avoided to occur.
The utility model is set to further: described valve seat pipe is provided with pipe end mounting flange relative to the other end being connected one end with valve body.
By adopting technique scheme, facilitate being linked and packed of external pipe and valve seat pipe.
Below in conjunction with accompanying drawing, the utility model is further described.
Accompanying drawing explanation
Fig. 1 is the utility model specific embodiment cut-off non-return plunger type sampling valve structural representation;
Fig. 2 is Figure 1A part partial enlarged view.
Embodiment
See accompanying drawing 1 and accompanying drawing 2, a kind of cut-off non-return plunger type sampling valve disclosed in the utility model, includes valve body 1, flap 2, valve rod 3, operating device 4, described valve body 1 front portion is provided with stream chamber 14, and valve body 1 rear portion is provided with valve gap 5, the front end in described stream chamber 14 is provided with valve seat 15, the head of described flap 2 becomes T shape, the head of this flap 2 is arranged in stream chamber 14 slippingly, be sealed and matched in slip between the afterbody of described flap 2 and valve body 1, form flap 2 to coordinate with the keying of valve seat 15, described flap 2 front end is fixedly installed and seals adaptive sealing valve pad 21 with valve seat 15, the head end of described valve rod 3 is connected in the root of flap 2 and coordinates with flap 2 one-tenth coaxial linkage, valve rod swivel nut 6 is provided with in described valve gap 5 and between valve rod 3, described valve rod 3 and valve rod swivel nut 6 form helical rotation and move forward or retreat and coordinate.Described operating device 4 is connected to the afterbody of valve rod 3 and is linked with it, valve body 1 is provided with steam inlet 12, sampling outlet 13 relative to the both sides in this stream chamber 14, sample tap 13 is connected with sample tap control valve 7.When flap 2 is closed, high-temperature steam enters in stream chamber 14 by steam inlet 12, flap 2 and stream chamber 14 are carried out disinfection, because stream chamber 14 volume is little, and it is smooth without dead angle, sterilization effect is good, in addition, sealing valve pad 21 and valve seat 15 that flap 2 is fixedly installed are sealed and matched, sealing is good, the present embodiment sealing valve pad 21 adopts the PTEE material of high temperature-resistant acid-resistant caustic corrosion to make, stable performance, of good reliability, in addition, valve rod 3 advances at valve rod swivel nut 6 internal spiral or retreats, centering is good, prevent from causing because of valve rod 3 sideslip flap 2 to close the generation of the situation such as poorly sealed, improve its sealability.Operating device described in the present embodiment 4 is for rotating handwheel 4, and the front portion of described rotation handwheel 4 is inserted in valve body 1 movably, and the front portion of this rotation handwheel 4 is provided with opening key 41, and the afterbody of described valve rod 3 and opening key 41 one-tenth rotate card arranging puts.So, when needs rotate keying flap 2, insert rotation handwheel 4 and operate, during end of operation, directly rotation handwheel 4 can be extracted, can prevent other people from carrying out sampling operation to sampling cock, prevent precious bacterial classification to run off.Operating device 4 described in certain the present embodiment can also the mode such as beam motor, cylinder be opened.
In this specific embodiment, described valve body 1 comprises the valve body 16 being with described stream chamber 14, and is positioned at the valve seat pipe 17 of front end, described stream chamber 14; Described valve seat pipe 17 is detachably arranged on valve body 16 front end, and described valve seat pipe 17 has the feed pathway 11 be communicated with described stream chamber 14, and the feed pathway 11 that described valve seat 15 is located at described valve seat pipe 17 is connected on the port of one end with described stream chamber 14; Wherein, described valve seat pipe 17 is provided with pipe end mounting flange 18 relative to the other end being connected one end with valve body 16; Valve seat pipe 17 and external pipe is facilitated to be linked and packed.When checking and change sealing valve pad 21, only valve seat pipe 17 need be disassembled from valve body 16, stream chamber 14 can be opened, flap 2 exposes, complete and flap 2 upper sealing valve pad 21 is checked or changed, after inspection, only need reinstall valve base 17, thus reach maintaining effect easily; And valve body assembles after adopting valve base and valve body parts processing, the difficulty of processing in valve seat and stream chamber etc. can be reduced.
Valve body 16 and valve base 17 can adopt the fastening piece such as bolt, pin to be connected, or pipe collar connects, or being threaded etc., there is the problem of dismounting inconvenience in above-mentioned linkage structure, therefore, described valve body 16 and valve seat pipe 17 adopt quick coupling structure 8' to be connected; To reach fast assembling-disassembling, facilitate valve base fast assembling-disassembling on valve body, maintain easily maintenance.
For realizing the ready-package design of sampling cock entirety, described valve gap 5 and valve body 16 adopt quick coupling structure 8'' to be connected.Described steam-gas inlet 12 is provided with steam pipe joint 9, steam pipe joint 9 comprises the first pipe joint 91 be fixedly connected on steam-gas inlet 12, and the second pipe joint 92 to be connected with the first pipe joint 91, described first pipe joint 91 adopts quick coupling structure 8''' to be connected with between the second pipe joint 92, and described second pipe joint 92 is provided with pipe end flange dish 93 relative to the other end being connected one end with the first pipe joint 91; Steam pipe joint is adopted sectional design, and facilitate steam pipe joint to be assemblied on valve body, and the first pipe joint and valve body are fixed, the second pipe joint and the second pipe joint fast demountable, can realize segmentation maintenance maintenance, maintain easily and reduce costs.
Wherein, the structure species of existing quick coupling structure is various, but the overwhelming majority exists the problems such as complex structure, connection reliability and intensity.For this reason, in this specific embodiment, described quick coupling structure comprises a pair mounting flange 81 with annular flange flange 811, and is folded with sealing gasket 83 between the end face of flange of clip 82, two mounting flange 81 of two mounting flange 81 upper annular flange 811 that are clamped and connected; Two mounting flanges 81 respectively with need the integrally machine shaping of the parts that are connected, or welding etc. is integrally connected, and the utility model preferentially adopts one-body molded, to reach firmly easy to connect.Clip is routine techniques, it comprises half clip unit A and half clip unit B, half clip unit A, B is provided with the holding tank that the annular flange flange for two adpting flanges embeds, half clip unit A and half clip unit B one end hinged, half clip unit A the other end hinge bolt, bolt head has screwed locking nut, half clip unit B is provided with deck, on half described clip unit A, bolt swings and snaps in the draw-in groove of deck, and half clip unit B is connected with half clip unit A locking by locking nut; During installation, the holding tank of half clip unit B and half clip unit A is entangled firm the annular flange flange of two adpting flanges, swing half clip unit A locks bolt card to be entered on the deck of half clip unit B, screw locking nut, opposite action completes dismounting, and this quick coupling structure is simple, and disassembly process is simple and convenient, and parts are few, durable.
For improving the sealing after two mounting flanges connections further, the end face of flange of described two mounting flanges 81 offers O-ring seal locating slot 812, and the both ends of the surface of described sealing gasket 83 are provided with the adaptive circular orientation projection 831 embedded in O-ring seal locating slot 812; Realize sealing gasket position to install accurately and reliably, meanwhile, circular orientation projection and O-ring seal locating slot, form one ring packing, improve sealability.
In this specific embodiment, described sample tap control valve 7 is stop valve 7, include stop valve body 71 and stop valve spool 72, stop valve body 71 is provided with stop valve stream chamber 712 relative to the inner side of sampling outlet 13, stop valve stream chamber 712 is provided with seat of stop valve 711 with sampling outlet 13 place of being conducted, seal in slip between stop valve spool 72 and stop valve body 71 and arrange, helically be rotatably assorted between stop valve spool 72 and stop valve body 71, the keying forming stop valve spool 72 and seat of stop valve 711 coordinates, one end that stop valve spool 72 is linked with seat of stop valve 711 is head end, the other end is the tail end passing stop valve body 71, stop valve spool 72 inside offers the material channel 721 passed through for material, material channel 721 includes material inlet 7211 and material outlet 7212, material inlet 7211 is positioned at the rear of stop valve spool 72 head end and is conducted with stop valve stream chamber 712, material outlet 7212 is positioned at the tail end of stop valve spool 72 and is conducted with space outerpace, the part that described stop valve spool 72 passes stop valve body 71 is detachably provided with handwheel 73, the bakelite handwheel that described handwheel 73 is made for bakelite material.When needs discharging, only need steam off import, remove the sealing of flap and stop valve spool respectively, make liquid inlet, stream chamber, stop valve stream chamber and material channel mutual conduction, thus form the passage of material process, when carrying out moise-heat sterilization, by revolving stop valve spool, its head end and seat of stop valve are formed to be sealed and matched, sealing is good, even if the bearing value that the pressure that steam inlet enters exceedes existing cut-off non-return plunger-type anti-theft sampling valve also can not cause stop valve spool to be opened, thus prevent sterilisation vapour punching press from causing stop valve to loosen inefficacy, stop valve spool detachably installs handwheel, can realize handwheel adopts the material being different from stop valve spool to make, process more convenient, the handwheel assembling that respective material is made can be carried out on demand, more flexible, and adopt bakelite material to make handwheel, there is higher mechanical strength, good insulating properties, heat-resisting, corrosion-resistant, scald accident can be avoided to occur.
Claims (9)
1. a cut-off non-return plunger type sampling valve, include valve body, flap, valve rod, operating device, described valve body front portion is provided with stream chamber, valve body rear portion is provided with valve gap, the front end in described stream chamber is provided with valve seat, the head of described flap becomes T shape, the head of this flap is arranged in stream chamber slippingly, be sealed and matched in slip between the afterbody of described flap and valve body, form flap to coordinate with the keying of valve seat, described flap front end is fixedly installed the sealing valve pad with valve base sealing adaptation, the head end of described valve rod is connected in the root of flap and becomes with flap coaxial linkage to coordinate, described operating device is connected to the afterbody of valve rod and is linked with it, valve body is provided with steam inlet relative to the both sides in this stream chamber, sampling outlet, sample tap is connected with sample tap control valve, it is characterized in that: described valve body comprises the valve body being with described stream chamber, and be positioned at the valve seat pipe of front end, described stream chamber, described valve seat pipe is detachably arranged on valve body front end, described valve seat pipe has the feed pathway be communicated with described stream chamber, the feed pathway that described valve seat is located at described valve seat pipe is connected on the port of one end with described stream chamber.
2. cut-off non-return plunger type sampling valve according to claim 1, is characterized in that: described valve body and valve seat pipe adopt quick coupling structure to be connected.
3. cut-off non-return plunger type sampling valve according to claim 2, it is characterized in that: described quick coupling structure comprises a pair mounting flange with annular flange flange, and the clip of the two mounting flange upper annular flange that are clamped and connected, be folded with sealing gasket between the end face of flange of two mounting flanges.
4. cut-off non-return plunger type sampling valve according to claim 3, it is characterized in that: the end face of flange of described two mounting flanges offers O-ring seal locating slot, the both ends of the surface of described sealing gasket are provided with the adaptive circular orientation projection embedded in O-ring seal locating slot.
5. cut-off non-return plunger type sampling valve according to claim 1 or 2 or 3 or 4, is characterized in that: described valve gap and valve body adopt quick coupling structure to be connected.
6. cut-off non-return plunger type sampling valve according to claim 1 or 2 or 3 or 4, it is characterized in that: described steam-gas inlet is provided with steam pipe joint, steam pipe joint comprises the first pipe joint be fixedly connected on steam-gas inlet, and the second pipe joint to be connected with the first pipe joint, described first pipe joint adopts quick coupling structure to be connected with between the second pipe joint, and described second pipe joint is provided with pipe end flange dish relative to the other end being connected one end with the first pipe joint.
7. cut-off non-return plunger type sampling valve according to claim 1, it is characterized in that: described sample tap control valve is stop valve, include stop valve body and stop valve spool, stop valve body is provided with stop valve stream chamber relative to the inner side of sampling outlet, stop valve stream chamber is provided with seat of stop valve with the sampling outlet place of being conducted, seal in slip between stop valve spool and stop valve body and arrange, helically be rotatably assorted between stop valve spool and stop valve body, the keying forming stop valve spool and seat of stop valve coordinates, one end that stop valve spool is linked with seat of stop valve is head end, the other end is the tail end passing stop valve body, stop valve valve core inside offers the material channel passed through for material, material channel includes material inlet and material outlet, material inlet is positioned at the rear of stop valve spool head end and is conducted with stop valve stream chamber, material outlet is positioned at the tail end of stop valve spool and is conducted with space outerpace, the part that described stop valve spool passes stop valve body is detachably provided with handwheel.
8. cut-off non-return plunger type sampling valve according to claim 7, is characterized in that: described handwheel is the bakelite handwheel that bakelite material is made.
9. cut-off non-return plunger type sampling valve according to claim 1, is characterized in that: described valve seat pipe is provided with pipe end mounting flange relative to the other end being connected one end with valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488014.8U CN204025778U (en) | 2014-08-27 | 2014-08-27 | A kind of cut-off non-return plunger type sampling valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420488014.8U CN204025778U (en) | 2014-08-27 | 2014-08-27 | A kind of cut-off non-return plunger type sampling valve |
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| CN204025778U true CN204025778U (en) | 2014-12-17 |
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|---|---|---|---|
| CN201420488014.8U Expired - Fee Related CN204025778U (en) | 2014-08-27 | 2014-08-27 | A kind of cut-off non-return plunger type sampling valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565522A (en) * | 2015-01-07 | 2015-04-29 | 中国瑞林工程技术有限公司 | Concentrated copper sulfate solution sampling valve |
| CN110337868A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学胜利学院 | A kind of agriculture spray seeding device of automation |
| CN112066042A (en) * | 2020-07-31 | 2020-12-11 | 清华大学 | Control rod drive line non-return combination valve structure and control rod water pressure drive system |
-
2014
- 2014-08-27 CN CN201420488014.8U patent/CN204025778U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565522A (en) * | 2015-01-07 | 2015-04-29 | 中国瑞林工程技术有限公司 | Concentrated copper sulfate solution sampling valve |
| CN104565522B (en) * | 2015-01-07 | 2017-01-18 | 中国瑞林工程技术有限公司 | Concentrated copper sulfate solution sampling valve |
| CN110337868A (en) * | 2019-07-22 | 2019-10-18 | 中国石油大学胜利学院 | A kind of agriculture spray seeding device of automation |
| CN112066042A (en) * | 2020-07-31 | 2020-12-11 | 清华大学 | Control rod drive line non-return combination valve structure and control rod water pressure drive system |
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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: 20141217 Termination date: 20200827 |
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| CF01 | Termination of patent right due to non-payment of annual fee |