CN111350852A - Hazardous gas discharges integrative device of separation - Google Patents
Hazardous gas discharges integrative device of separation Download PDFInfo
- Publication number
- CN111350852A CN111350852A CN201811567189.7A CN201811567189A CN111350852A CN 111350852 A CN111350852 A CN 111350852A CN 201811567189 A CN201811567189 A CN 201811567189A CN 111350852 A CN111350852 A CN 111350852A
- Authority
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- China
- Prior art keywords
- ball valve
- orchid
- disc
- pipe
- telescopic column
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 231100001261 hazardous Toxicity 0.000 title claims abstract description 17
- 238000000926 separation method Methods 0.000 title claims abstract description 13
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 241000233855 Orchidaceae Species 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 230000004888 barrier function Effects 0.000 claims description 13
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 49
- 230000000694 effects Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 5
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000012824 chemical production Methods 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0008—Mechanical means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a hazardous gas emission and separation integrated device, which comprises a ball valve, an air inlet pipe and an air outlet pipe, wherein the air inlet pipe and the air outlet pipe are symmetrically arranged at two sides of the ball valve and are communicated with the ball valve, an orchid disc is arranged inside the ball valve, the edge of the orchid disc is also provided with four connecting blades, a one-way valve is arranged inside the air outlet pipe, symmetrical fixed blocks are welded in the pipe wall of the air inlet pipe, one side of each fixed block is provided with a spring and a telescopic column, two ends of the spring are respectively connected with the fixed blocks and the telescopic columns and respectively apply pressure to the fixed blocks and the telescopic columns, the side surfaces of the telescopic columns are provided with sealing sheets, the sealing sheets are adhered with the telescopic columns and partially extend into the ball valve, the air tightness is good, meanwhile, gas cannot overflow or backflow in the transportation process, and can be discharged and separated at any time through, and can remind the staff.
Description
Technical Field
The invention relates to the technical field of gas discharge devices, in particular to a hazardous gas discharge and barrier integrated device.
Background
With the rapid development of industrialization, a large amount of dangerous gases such as hydrogen sulfide, fluoride, nitrogen oxide, chlorine, hydrogen chloride, carbon monoxide and the like are generated in chemical production, and with the increasing awareness of human environmental protection, the gases are collected by a collecting device after being generated and are transported to an exhaust gas treatment center for proper treatment.
Through search and discovery, the invention of patent No. CN202305285U discloses a toxic gas collecting device, which comprises a reaction box, a pipeline, an exhaust fan, a differential pressure gauge and a collecting box, wherein a carrying disc for placing reactants is arranged in the reaction box, the top of the reaction box is provided with an exhaust opening, the exhaust opening is connected with the pipeline exhaust fan, and the exhaust fan is communicated with the gas collecting box through the pipeline. However, analysis shows that industrial hazardous gas needs to be transported in a transportation and purification device, gas overflow can be caused due to poor sealing conditions, meanwhile, the unidirectional backflow of the gas can also cause low transportation efficiency, flux and blocking can not be achieved at any time when the gas is transported, and workers can not know when the gas is discharged and blocked.
Disclosure of Invention
Therefore, in order to solve the above-mentioned disadvantages, the present invention provides an integrated hazardous gas discharge and barrier device, which has good gas tightness, does not cause gas overflow or backflow during the transportation process, can realize discharge and barrier at any time through an external controller, and can remind workers.
The invention is realized in such a way that a dangerous gas emission and separation integrated device is constructed, which comprises a ball valve, a gas inlet pipe and a gas outlet pipe, wherein the gas inlet pipe and the gas outlet pipe are symmetrically arranged at two sides of the ball valve and are communicated with the ball valve; an orchid disc is arranged inside the ball valve, and four connecting blades are arranged at the edge of the orchid disc; a one-way valve is arranged in the air outlet pipe; the ball valve is characterized in that symmetrical fixed blocks are welded in the pipe wall of the air inlet pipe, a spring and a telescopic column are arranged on one side of the fixed block, two ends of the spring are respectively connected with the fixed block and the telescopic column and respectively apply pressure to the fixed block and the telescopic column, a sealing sheet is arranged on the side surface of the telescopic column, and the sealing sheet is bonded with the telescopic column and partially extends into the ball valve;
the surface of the ball valve is provided with a cross turntable, and the cross turntable is coaxially connected with a orchid disc; copper bells are uniformly distributed on the side face of the cross-shaped rotary table, and the end portion of the cross-shaped rotary table is in contact with bell handles of the copper bells.
As above-mentioned technical scheme's improvement, the nested joint of table wall of intake pipe has the hasp, just the hasp passes through screw-thread fit with the intake pipe and is connected, the side of hasp is equipped with sealed the pad, and the screw thread through the intake pipe surface that sets up makes its one end be connected with dress gas container, can lock intake pipe and container through the hasp, and sealed the pad is used for sealedly simultaneously, and the outlet duct adopts check valve control simultaneously, increases sealed effect, prevents gas reflux simultaneously, improves the security of transmission.
As an improvement of the technical scheme, the central position of the orchid disc is embedded with an insertion hole, the central position of the cross turntable is embedded with a reverse threaded hole, the insertion hole and the reverse threaded hole are used for being inserted into an external connecting bolt, the connecting bolt and the ball valve are sealed, so that gas in the ball valve is prevented from overflowing, the orchid disc and the cross turntable are kept connected, and the cross turntable is contacted with a copper bell after rotating and then rings the copper bell to achieve an early warning effect.
As above-mentioned technical scheme's improvement, the edge of linking the blade and the edge close fitting and the looks adaptation of gasket, when moving to the identical position of complete and gasket looks unanimity through the linking blade that sets up, the intake pipe, link and be in the laminating between blade and the gasket and compress tightly the state, the intake pipe also can't ventilate, thereby realize the separation purpose, after linking the blade and remove away, separate between intake pipe and the gasket, the clearance increases, thereby realize gas emission's purpose, make gaseous separation and emission can enough carry out effective control.
The invention provides a hazardous gas discharge and barrier integrated device through improvement, which has the following advantages compared with the existing hazardous gas discharge and barrier integrated device: the air tightness is good; the gas can not cause gas overflow or backflow in the transportation process; can realize discharging and separation at any time through external control ware to can remind the staff, the concrete embodiment is:
the method has the advantages that: the nested joint of the table wall of intake pipe has the hasp, just the hasp passes through screw-thread fit with the intake pipe and is connected, the side of hasp is equipped with sealed the pad, and the screw thread through the intake pipe surface that sets up makes its one end be connected with dress gas container, can lock intake pipe and container through the hasp, and sealed pad is used for sealedly simultaneously, and the outlet duct adopts the check valve control simultaneously, increases sealed effect, prevents gas reflux simultaneously, improves the security of transmission.
The method has the advantages that: the central point of orchid video disc puts the embedding and is equipped with the jack, the central point of cross carousel puts the embedding and is provided with reverse screw hole, is used for inserting outside connecting bolt through the jack that sets up and reverse screw hole, through sealed processing between connecting bolt and the ball valve, prevents that gas from spilling over in the ball valve, makes and keeps being connected between orchid video disc and the cross carousel, rings the effect that the copper bell reaches the early warning after the cross carousel rotates and contacts with the copper bell.
The method has the advantages that: the edge of linking up the blade and the edge close fitting and the looks adaptation of gasket, when moving to the identical position completely with the gasket through the linking blade that sets up, the intake pipe, link up and be in the laminating and compress tightly the state between blade and the gasket, the intake pipe also can't ventilate, thereby realize the separation purpose, after linking up the blade and remove away, the separation between intake pipe and the gasket, the clearance increases, thereby realize gas emission's purpose, make gaseous separation and emission can carry out effective control.
Drawings
FIG. 1 is a schematic structural view of a hazardous gas discharge and barrier integrated device according to the present invention;
FIG. 2 is a schematic view of a partial structure of a ball valve of the integrated hazardous gas discharge and barrier device of the present invention;
fig. 3 is an enlarged view of part a of fig. 1 of a hazardous gas discharge and barrier integrated device of the present invention.
Sequence numbers shown in the figures: ball valve 1, intake pipe 2, outlet duct 3, check valve 4, orchid dish 5, link up blade 501, jack 502, hasp 6, sealed pad 601, cross carousel 7, reverse screw hole 701, copper bell 8, fixed block 9, spring 901, flexible post 902 and gasket 903.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present invention provides a hazardous gas discharge and barrier integrated device by improvement, as shown in fig. 1 to 3, which can be implemented as follows; the air inlet pipe 2 and the air outlet pipe 3 are symmetrically arranged on two sides of the ball valve 1 and are communicated with the ball valve 1; the interior of the ball valve 1 is provided with an orchid disc 5, and the edge of the orchid disc 5 is also provided with four connecting blades 501; a one-way valve 4 is arranged in the air outlet pipe 3; the pipe wall of the air inlet pipe 2 is welded with symmetrical fixed blocks 9, one side of each fixed block 9 is provided with a spring 901 and a telescopic column 902, two ends of each spring 901 are respectively connected with the corresponding fixed block 9 and the corresponding telescopic column 902 and respectively apply pressure to the corresponding fixed block 9 and the corresponding telescopic column 902, the side surface of each telescopic column 902 is provided with a sealing sheet 903, and the sealing sheets 903 are bonded with the corresponding telescopic columns 902 and partially extend into the ball valve 1;
the surface of the ball valve 1 is provided with a cross turntable 7, and the cross turntable 7 is coaxially connected with the orchid disc 5; copper bells 8 are uniformly distributed on the side surface of the cross-shaped rotary disc 7, and the end part of the cross-shaped rotary disc 7 is contacted with the bell handles of the copper bells 8.
In the invention, the surface wall of the air inlet pipe 2 is nested and clamped with the lock catch 6, the lock catch 6 is in matched connection with the air inlet pipe 2 through threads, the side surface of the lock catch 6 is provided with a sealing gasket 601, one end of the air inlet pipe 2 is connected with the air container through the arranged screw thread on the surface of the air inlet pipe, the air inlet pipe 2 and the container can be locked through the lock catch 6, meanwhile, the sealing gasket 601 is used for sealing, the air outlet pipe 3 is controlled by the one-way valve 4, the sealing effect is improved, the gas backflow is prevented, the transmission safety is improved, when gas transmission is carried out, a PLC (programmable logic controller) outside the device controls a motor to rotate a cross turntable 7 to drive an orchid disc 5 to rotate, so that a connecting blade 501 and a sealing sheet 903 are separated, at the moment, a spring 901 pushes a telescopic column 902 and the sealing sheet 903 to move towards the inside of a ball valve 1, so that the sealing sheet 903 is separated from an air inlet pipe 2, air flow enters the ball valve 1, and gas is discharged into a purifying device from an air outlet pipe 3 through a one-way valve 4; the center position of an orchid disc 5 is embedded with a jack 502, the center position of a cross turntable 7 is embedded with a reverse threaded hole 701, the jack 502 and the reverse threaded hole 701 are used for being inserted into an external connecting bolt, the connecting bolt and a ball valve 1 are sealed, gas in the ball valve 1 is prevented from overflowing, the orchid disc 5 and the cross turntable 7 are kept connected, the cross turntable 7 is in contact with a copper bell 8 after rotating and then rings the copper bell 8 to achieve an early warning effect, the cross turntable 7 is rotated again to drive the orchid disc 5 to rotate when blocking gas transmission, and at the moment, the copper bell 8 is knocked when four end parts of the cross turntable 7 contact with a bell handle of the copper bell 8, so that the sealing sheet 903 is extruded into an air inlet pipe 2 by a blade 501, and the end of the air inlet pipe 2 is sealed by the sealing sheet 903 to block; linking blade 501's edge and sealing piece 903's edge close fitting and looks adaptation, move to completely when consistent anastomotic position with sealing piece 903 through the linking blade 501 that sets up, intake pipe 2, link up and be in the laminating between blade 501 and the sealing piece 903 and compress tightly the state, intake pipe 2 also can't ventilate, thereby realize the separation purpose, after linking blade 501 and remove away, separate between intake pipe 2 and the sealing piece 903, the clearance increases, thereby realize gas emission's purpose, make gaseous separation and emission can carry out effective control.
The working principle of the hazardous gas emission and barrier integrated device is as follows: firstly, a connecting bolt is inserted through a jack 502 and a reverse threaded hole 701, the connecting bolt and a ball valve 1 are sealed to prevent gas in the ball valve 1 from overflowing, a cross turntable 7 is used for driving an orchid disc 5 to rotate, then an air inlet pipe 2 is connected with a discharge end container, a rotating lock catch 6 is used for locking the air inlet pipe 2 and the container, a sealing gasket 601 is used for sealing, an air outlet pipe 3 is connected with a purifying container, a PLC (programmable logic controller) control motor outside the device is inserted into the reverse threaded hole 701, the cross turntable 7 is rotated in a forward direction to drive the orchid disc 5 to rotate, so that a connecting blade 501 is separated from a sealing sheet 903, at the moment, a spring 901 pushes a telescopic column 902 and the sealing sheet 903 to move towards the ball valve 1, the sealing sheet 903 is separated from the air inlet pipe 2, air enters the ball valve 1, the air is discharged into the purifying device from the air outlet pipe 3 through a one-way valve 4, at this time, the four ends of the cross-shaped rotating disk 7 are knocked to ring the bell handle of the bell 8, so that the connecting blade 501 presses the sealing sheet 903 into the air inlet pipe 2, and the sealing sheet 903 seals and separates the end of the air inlet pipe 2.
In conclusion; compared with the conventional dangerous gas discharge device, the dangerous gas discharge and obstruction integrated device has good gas tightness, can not cause gas overflow or backflow in the transfer process of gas, can realize discharge and obstruction at any time through an external controller, and can remind workers.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The utility model provides an integrative device of hazardous gas emission separation, includes ball valve (1), intake pipe (2) and outlet duct (3), its characterized in that: the air inlet pipe (2) and the air outlet pipe (3) are symmetrically arranged on two sides of the ball valve (1) and are communicated with the ball valve (1); an orchid disc (5) is arranged inside the ball valve (1), and four connecting blades (501) are further arranged at the edge of the orchid disc (5); a one-way valve (4) is arranged in the air outlet pipe (3); the ball valve is characterized in that symmetrical fixing blocks (9) are welded in the pipe wall of the air inlet pipe (2), a spring (901) and a telescopic column (902) are arranged on one side of each fixing block (9), two ends of each spring (901) are respectively connected with the corresponding fixing block (9) and the corresponding telescopic column (902), pressure is applied to the corresponding fixing block (9) and the corresponding telescopic column (902), a sealing sheet (903) is arranged on the side surface of the corresponding telescopic column (902), and the sealing sheet (903) is bonded with the corresponding telescopic column (902) and partially extends into the ball valve (1);
the surface of the ball valve (1) is provided with a cross turntable (7), and the cross turntable (7) is coaxially connected with the orchid disc (5); copper bells (8) which are uniformly distributed are arranged on the side face of the cross-shaped rotary disc (7), and the end part of the cross-shaped rotary disc (7) is in contact with the bell handles of the copper bells (8).
2. The hazardous gas discharge and barrier integrated device of claim 1, wherein: the nested joint of the table wall of intake pipe (2) has hasp (6), just hasp (6) and intake pipe (2) are connected through screw-thread fit, the side of hasp (6) is equipped with sealed pad (601).
3. The hazardous gas discharge and barrier integrated device of claim 1, wherein: the center position embedding of orchid dish (5) is equipped with jack (502), the center position embedding of cross carousel (7) is provided with reverse screw hole (701).
4. The hazardous gas discharge and barrier integrated device of claim 1, wherein: the edge of the engaging blade (501) is closely attached and matched with the edge of the sealing piece (903).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567189.7A CN111350852A (en) | 2018-12-20 | 2018-12-20 | Hazardous gas discharges integrative device of separation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567189.7A CN111350852A (en) | 2018-12-20 | 2018-12-20 | Hazardous gas discharges integrative device of separation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111350852A true CN111350852A (en) | 2020-06-30 |
Family
ID=71190462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811567189.7A Pending CN111350852A (en) | 2018-12-20 | 2018-12-20 | Hazardous gas discharges integrative device of separation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111350852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400284A (en) * | 2022-09-13 | 2022-11-29 | 枣庄市肿瘤医院(枣庄市胸科医院) | Nursing infusion pump |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6695285B1 (en) * | 1999-11-23 | 2004-02-24 | Swagelok Company | Ball valve seat seal |
| US20070209719A1 (en) * | 2006-03-13 | 2007-09-13 | Itt Manufacturing Enterprises, Inc. | Triple duty valve |
| CN203963147U (en) * | 2014-07-28 | 2014-11-26 | 江苏大高机械有限公司 | Prevent the ball valve of medium back flow |
| CN205605893U (en) * | 2016-04-29 | 2016-09-28 | 浙江富克林环保科技有限公司 | Take check valve formula ball valve |
| CN108730557A (en) * | 2018-08-07 | 2018-11-02 | 普雷沃流体控制科技（芜湖）有限公司 | A kind of leakage resistant valve being easily installed |
-
2018
- 2018-12-20 CN CN201811567189.7A patent/CN111350852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6695285B1 (en) * | 1999-11-23 | 2004-02-24 | Swagelok Company | Ball valve seat seal |
| US20070209719A1 (en) * | 2006-03-13 | 2007-09-13 | Itt Manufacturing Enterprises, Inc. | Triple duty valve |
| CN203963147U (en) * | 2014-07-28 | 2014-11-26 | 江苏大高机械有限公司 | Prevent the ball valve of medium back flow |
| CN205605893U (en) * | 2016-04-29 | 2016-09-28 | 浙江富克林环保科技有限公司 | Take check valve formula ball valve |
| CN108730557A (en) * | 2018-08-07 | 2018-11-02 | 普雷沃流体控制科技（芜湖）有限公司 | A kind of leakage resistant valve being easily installed |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115400284A (en) * | 2022-09-13 | 2022-11-29 | 枣庄市肿瘤医院(枣庄市胸科医院) | Nursing infusion pump |
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Application publication date: 20200630 |