CN108194820A - A kind of steam trap connection for hydraulic engineering - Google Patents
A kind of steam trap connection for hydraulic engineering Download PDFInfo
- Publication number
- CN108194820A CN108194820A CN201711379082.5A CN201711379082A CN108194820A CN 108194820 A CN108194820 A CN 108194820A CN 201711379082 A CN201711379082 A CN 201711379082A CN 108194820 A CN108194820 A CN 108194820A
- Authority
- CN
- China
- Prior art keywords
- valve body
- protective cover
- fixed
- hydraulic engineering
- steam trap
- 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.)
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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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
-
- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
-
- 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
- F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
- F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
- F16T1/38—Component parts; Accessories
- F16T1/48—Monitoring arrangements for inspecting, e.g. flow of steam and steam condensate
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a kind of steam trap connection for hydraulic engineering, structure includes：Mark,Valve body,Footing,Groove,Paddle hole,Tubing string,Lantern ring,Shaft-cup,Protective cover,Pipe axis,Mark rectangular cross-section structure and level are tightly attached to valve body side and are gap-matched,Valve body is installed vertically on protective cover bottom end and using the mode that is interlocked,Footing is conllinear with protective cover axle center,Groove is equipped with multiple and is uniformly embedded into paddle hole left and right ends altogether,Valve body of the present invention is by adjusting rod,Locking screw is red,Stent,Rotating wheel,Diaphragm,Pulley,Connecting rod,Sensor,Fixed block,Partition board,Spring,Limited block,Piston boit,Conductor,To guide rod,Gear,Gear grooved,Ontology forms,Vacuum will be formed in diaphragm or tubing string by realizing steam condensate,This will prevent condensation water from freely being emitted from system before freezing,It ensure that being smoothed out for hydrophobic work,Effectively increase the practical performance of equipment.
Description
Technical field
The present invention is a kind of steam trap connection for hydraulic engineering, belongs to steam trap connection technical field.
Background technology
Hydraulic engineering is the surface water and groundwater for controlling and allocating nature, reaches and removes the evil emerging sharp purpose and build
Engineering, also referred to as Hydraulic Projects, water is human being's production and essential precious resources of living, but the state of its naturally occurring is simultaneously
Not in full conformity with the needs of the mankind, hydraulic engineering is only built, flow could be controlled, prevents flood, and carry out water
It adjusts and distributes, to meet the needs of people's lives and production to water resource, hydraulic engineering needs to build dam, dike, spillway, water
Lock, channel, crosses the different types of hydraulic structure such as mortise, log chute, fish pass at water inlet, to realize its target.
But the prior art is incomplete, and antifreezing measures are not opened under drain valve service condition causes delivery pipe can not be certainly
Dynamic discharge, easily breaks down.
Invention content
In view of the deficienciess of the prior art, it is an object of the present invention to provide a kind of steam trap connection for hydraulic engineering, with
It is incomplete to solve the prior art, not opening antifreezing measures under drain valve service condition causes delivery pipe not arrange automatically
The problems such as putting, easily breaking down.
To achieve these goals, the present invention is to realize by the following technical solutions：It is a kind of for hydraulic engineering
Steam trap connection, structure include：Mark, valve body, footing, groove, paddle hole, tubing string, lantern ring, shaft-cup, protective cover, pipe
Axis, the mark rectangular cross-section structure and level are tightly attached to valve body side and are gap-matched, and the valve body hangs down
Straight to be installed on protective cover bottom end and using the mode that is interlocked, the footing is fixed on valve body lower end vertically, and the footing is with preventing
Shield axle center is conllinear, and the groove is equipped with multiple and is uniformly embedded into paddle hole left and right ends altogether, and the paddle hole section is
Rectangular configuration and level are passed through in valve inner and using interference fit, and the tubing string is equipped with seven and is vertically arranged to valve body altogether
Upper end and with protective cover using matching, the tubing string is conllinear with footing axle center, and the lantern ring is vertically tightly attached to tubing string top
And weld together, the shaft-cup is vertically arranged to valve body upper end and welds together with protective cover, and the shaft-cup is with preventing
Shield is integrated, and the protective cover is vertically fixed on valve body upper end and welds together, and the pipe axis level runs through
In valve inner and with paddle hole using matching, the valve body by adjusting rod, locking screw pellet, stent, rotating wheel, every
Film, pulley, connecting rod, sensor, fixed block, partition board, spring, limited block, piston boit, conductor, to guide rod, gear, gear grooved, sheet
Body forms, and the adjusting rod is fixed on locking screw pellet upper end and with rotating wheel using matching vertically, and the locking screw pellet is total to
If adjusting rod lower end is fixed on there are two and uniformly, the stent sets there are two and is horizontally installed to adjusting rod left and right ends simultaneously altogether
And with rotating wheel using being mechanically connected, the rotating wheel is fixed on internal stent vertically, the diaphragm set altogether there are three and uniformly
Be installed on connecting rod lower end and using mechanical connection, the pulley set altogether there are six and horizontal embedded connecting rod inside and using spiral shell
Line connects, and the connecting rod is vertically fixed on diaphragm upper end, and the sensor section is rectangular configuration and is fixed on spring top vertically
It holds and with partition board using matching, the fixed block is horizontally installed to piston boit left end, and the partition board is conllinear with spring axis,
The spring is embedded in sensor internal and welds together vertically, and the limited block is installed vertically on piston boit lower end, described
For piston boit vertically through limited block inside and with fixed block using being mechanically connected, the conductor is horizontally fixed on the piston boit right side
It holds and is matched with being used to guide rod, described to be horizontally installed on the left of gear upper end to guide rod, the gear level is tightly attached to
Gear grooved left end and use mechanical connection, the gear grooved are vertically tightly attached to valve inner upper end and use gap with ontology
Cooperation, the sensor is made of fixing device, supporting rod, top shell lid, locking slot, valve block, clamping plate, conveyer belt, idler wheel, described
Fixing device is horizontally fixed on locking slot left and right ends and welds together, and the supporting rod is vertically arranged to valve block lower end simultaneously
And weld together with fixing device, the top shell lid is nested in fixing device outer ring and vertically using the mode that is interlocked, institute
Locking slot to be stated to be horizontally fixed on inside top shell lid, the valve block is embedded in locking slot inner upper end and uses interference fit vertically,
The clamping plate level through inside valve block, the conveyer belt level be tightly attached to idler wheel side and with clamping plate using machinery even
It connects, the idler wheel is horizontally fixed on inside top shell lid, and the supporting rod is conllinear with spring axis.
Further, the groove section is inside circular configuration and horizontal embedded paddle hole.
Further, the paddle hole sets there are two and is uniformly fixed on valve body left and right ends and is welded on one altogether
It rises.
Further, the shaft-cup is conllinear with valve body axle center.
Further, the valve body is integrated with protective cover.
Further, the valve body is mechanical part, and flexibility ratio is high, easy for installation.
Further, the protective cover is metal material.
Advantageous effect
A kind of steam trap connection for hydraulic engineering of the invention, realize steam condensate will in diaphragm or tubing string shape
Into vacuum, this will prevent condensation water from freely being emitted from system, ensure that the suitable of hydrophobic work before freezing
Profit carries out, and effectively increases the practical performance of equipment.
Description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon：
Fig. 1 is a kind of structure diagram of steam trap connection for hydraulic engineering of the invention.
Fig. 2 is a kind of valve inner structure chart of steam trap connection for hydraulic engineering of the invention.
Fig. 3 is a kind of valve inner transmission diagram of steam trap connection for hydraulic engineering of the invention.
Fig. 4 is a kind of sensor internal structure chart of steam trap connection for hydraulic engineering of the invention.
Fig. 5 is the A in Fig. 2.
In figure：Mark -1, valve body -2, footing -3, groove -4, paddle hole -5, tubing string -6, lantern ring -7, shaft-cup -8,
Protective cover -9, pipe axis -10, adjusting rod -201, locking screw pellet -202, stent -203, rotating wheel -204, diaphragm -205, pulley -
206th, connecting rod -207, sensor -208, fixed block -209, partition board -210, spring -211, limited block -212, piston boit -213, lead
Body -214, to guide rod -215, gear -216, gear grooved -217, ontology -218, fixing device -2081, supporting rod -2082, top shell
Lid -2083, locking slot -2084, valve block -2085, clamping plate -2086, conveyer belt -2087, idler wheel -2088.
Specific embodiment
To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, with reference to
Specific embodiment, the present invention is further explained.
- Fig. 5 is please referred to Fig.1, the present invention provides a kind of steam trap connection technical solution for hydraulic engineering：Its structure packet
It includes：Mark 1, valve body 2, footing 3, groove 4, paddle hole 5, tubing string 6, lantern ring 7, shaft-cup 8, protective cover 9, pipe axis 10, institute
It states 1 rectangular cross-section structure of mark and level is tightly attached to 2 side of valve body and is gap-matched, the valve body 2 is vertical
Be installed on 9 bottom end of protective cover and using being interlocked mode, the footing 3 is fixed on 2 lower end of valve body vertically, the footing 3 with
9 axle center of protective cover is conllinear, and the groove 4 is equipped with multiple and is uniformly embedded into 5 left and right ends of paddle hole, the paddle hole 5 altogether
Rectangular cross-section structure and level are passed through in 2 inside of valve body and using interference fit, and the tubing string 6 is equipped with seven and vertical peace altogether
Loaded on 2 upper end of valve body and with protective cover 9 using matching, the tubing string 6 is conllinear with 3 axle center of footing, and the lantern ring 7 is vertical tight
It is affixed on 6 top of tubing string and welds together, the shaft-cup 8 is vertically arranged to 2 upper end of valve body and is welded on one with protective cover 9
It rises, the shaft-cup 8 is integrated with protective cover 9, and the protective cover 9 is vertically fixed on 2 upper end of valve body and is welded on one
It rises, 10 level of pipe axis is through 2 inside of valve body and with paddle hole 5 using matching, and the valve body 2 is by adjusting rod
201st, locking screw pellet 202, stent 203, rotating wheel 204, diaphragm 205, pulley 206, connecting rod 207, sensor 208, fixed block
209th, partition board 210, spring 211, limited block 212, piston boit 213, conductor 214, to guide rod 215, gear 216, gear grooved 217,
Ontology 218 forms, and the adjusting rod 201 is fixed on red 202 upper ends of locking screw and is used with rotating wheel 204 and matched vertically,
The locking screw pellet 202 sets there are two and is uniformly fixed on 201 lower end of adjusting rod altogether, the stent 203 set altogether there are two and water
Loaded on 201 left and right ends of adjusting rod and with rotating wheel 204 using being mechanically connected, the rotating wheel 204 is fixed on safety vertically
Inside stent 203, the diaphragm 205 sets there are three and is uniformly installed on 207 lower end of connecting rod and uses mechanical connection altogether, described
There are six pulley 206 is set altogether and inside horizontal embedded connecting rod 207 and using threaded connection, the connecting rod 207 is vertically fixed on
205 upper end of diaphragm, the 208 rectangular cross-section structure of sensor and is fixed on 211 top of spring and is adopted with partition board 210 vertically
With matching, the fixed block 209 is horizontally installed to 213 left end of piston boit, and the partition board 210 is conllinear with 211 axle center of spring, institute
It states vertical embedded 208 inside of sensor of spring 211 and welds together, the limited block 212 is installed vertically on piston boit 213
Lower end, the piston boit 213 is vertically through 212 inside of limited block and with fixed block 209 using mechanical connection, the conductor
214 are horizontally fixed on 213 right end of piston boit and are matched with being used to guide rod 215, described to be horizontally installed to tooth to guide rod 215
It takes turns on the left of 216 upper ends, 216 level of gear is tightly attached to 217 left end of gear grooved and using mechanical connection, the gear grooved
217 are vertically tightly attached to 2 inner upper end of valve body and are gap-matched with ontology 218, and the sensor 208 is by fixing device
2081st, supporting rod 2082, top shell lid 2083, locking slot 2084, valve block 2085, clamping plate 2086, conveyer belt 2087,2088 groups of idler wheel
Into the fixing device 2081 is horizontally fixed on 2084 left and right ends of locking slot and welds together, the supporting rod 2082
It is vertically arranged to 2085 lower end of valve block and welds together with fixing device 2081, the top shell lid 2083 is nested in solid vertically
Determine 2081 outer ring of device and using the mode that is interlocked, the locking slot 2084 is horizontally fixed on inside top shell lid 2083, described
Embedded 2084 inner upper end of locking slot and using interference fit vertically of valve block 2085, the clamping plate 2086 is horizontal through valve block
Inside 2085,2087 level of conveyer belt is tightly attached to 2088 side of idler wheel and with clamping plate 2086 using mechanical connection, described
Idler wheel 2088 is horizontally fixed on inside top shell lid 2083, and the supporting rod 2082 is conllinear with 211 axle center of spring, and the groove 4 is cut
Face is inside circular configuration and horizontal embedded paddle hole 5, and the paddle hole 5 sets there are two and is uniformly fixed on valve body 2 altogether
Left and right ends and weld together, the shaft-cup 8 is conllinear with 2 axle center of valve body, the valve body 2 and 9 being integrated of protective cover knot
Structure, the valve body 2 are mechanical part, and flexibility ratio is high, easy for installation, and the protective cover 9 is metal material.
Valve body 2 of the present invention is a kind of valve, also referred to as steam trap, drain valve, be by the condensation water in vapour system, air and
Carbon dioxide gas is discharged as early as possible, while is automatically prevented from the leakage of steam to the maximum extent, and the various types of drain valve respectively have not
Same performance when selecting drain valve, should select its characteristic that can meet the optimum operation of steam-heating apparatus, then just consider it first
His objective condition, selects your required drain valve to be only correct and effective in this way.
It is carried out in a kind of steam trap connection for hydraulic engineering in use, being horizontally fixed on 2 left side of valve body by paddle hole 5
It right both ends and is welded and is fixed together with pipe axis 10, then be discharged into making from diaphragm 205 by steam condensate
Connecting rod 207 carries out rotation due to the gravitation of water makes that water condensation can be prevented before frost, then passes through sensor 208 and spring
211, which carry out conduction, enables fixed block 209 to receive power and be driven to guide rod 215, finally by gear 216 and gear
Slot 217 is mechanically connected work, and vacuum will be formed in diaphragm or tubing string by realizing steam condensate, this will freezed
Condensation water is prevented freely to be emitted from system before, ensure that being smoothed out for hydrophobic work, effectively increase equipment
Practical performance.
The present invention solves the problems, such as it is that the prior art is incomplete, and antifreezing measures are not opened under drain valve service condition
Cause delivery pipe can not automatic-discharging, easily break down, being combined with each other by above-mentioned component of the invention realizes steam
Condensation water will form vacuum in diaphragm or tubing string, this will prevent condensation water from freely being arranged from system before freezing
It runs out, ensure that being smoothed out for hydrophobic work, effectively increase the practical performance of equipment.
The basic principles, main features and the advantages of the invention have been shown and described above, for this field skill
For art personnel, it is clear that the present invention is not limited to the details of above-mentioned exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action
Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that including all changes falling within the meaning and scope of the equivalent requirements of the claims in the present invention
It is interior.Any reference numeral in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (5)
1. a kind of steam trap connection for hydraulic engineering, structure includes：Mark (1), valve body (2), footing (3), groove
(4), paddle hole (5), tubing string (6), lantern ring (7), shaft-cup (8), protective cover (9), pipe axis (10), it is characterised in that：
Mark (1) the rectangular cross-section structure and level are tightly attached to valve body (2) side and are gap-matched, described
Valve body (2) is installed vertically on protective cover (9) bottom end and using the mode that is interlocked, and the footing (3) is fixed on valve body (2) vertically
Lower end, the footing (3) is conllinear with protective cover (9) axle center, and the groove (4) is equipped with multiple and is uniformly embedded into paddle hole altogether
(5) left and right ends, paddle hole (5) the rectangular cross-section structure and level are passed through internal in valve body (2) and are matched using interference
It closes, the tubing string (6) is equipped with seven and is vertically arranged to valve body (2) upper end and uses with protective cover (9) match altogether, described
Tubing string (6) is conllinear with footing (3) axle center, and the lantern ring (7) is vertically tightly attached to tubing string (6) top and is welded together, described
Shaft-cup (8) is vertically arranged to valve body (2) upper end and welds together with protective cover (9), the shaft-cup (8) and protective cover (9)
It is integrated, the protective cover (9) is vertically fixed on valve body (2) upper end and welds together, pipe axis (10) water
It is flat to be matched through valve body (2) inside and with paddle hole (5) use；
The valve body (2) is by adjusting rod (201), locking screw red (202), stent (203), rotating wheel (204), diaphragm (205), cunning
It takes turns (206), connecting rod (207), sensor (208), fixed block (209), partition board (210), spring (211), limited block (212), live
Stick harness (213), conductor (214) are formed to guide rod (215), gear (216), gear grooved (217), ontology (218)；
The adjusting rod (201) is fixed on red (202) upper end of locking screw and is used with rotating wheel (204) and matched vertically, institute
It states locking screw red (202) to set altogether there are two and be uniformly fixed on adjusting rod (201) lower end, there are two the stent (203) sets altogether
And it is horizontally installed to adjusting rod (201) left and right ends and with rotating wheel (204) using mechanical connection, the rotating wheel (204)
The vertical stent (203) that is fixed on is internal, the diaphragm (205) set altogether there are three and be uniformly installed on connecting rod (207) lower end and
Using mechanical connection, the pulley (206) set altogether there are six and horizontal embedded connecting rod (207) it is internal and using being threadedly coupled,
The connecting rod (207) is vertically fixed on diaphragm (205) upper end, sensor (208) the rectangular cross-section structure and vertical fixation
It is matched on spring (211) top and with partition board (210) use, the fixed block (209) is horizontally installed to piston boit (213)
Left end, the partition board (210) is conllinear with spring (211) axle center, and it is internal simultaneously that the spring (211) is embedded in sensor (208) vertically
And weld together, the limited block (212) is installed vertically on piston boit (213) lower end, and the piston boit (213) is run through vertically
Mechanical connection is used in limited block (212) inside and with fixed block (209), the conductor (214) is horizontally fixed on piston boit
(213) right end and with to guide rod (215) using matching, it is described to be horizontally installed to gear (216) upper end left side to guide rod (215)
Side, gear (216) level are tightly attached to gear grooved (217) left end and using mechanical connections, and the gear grooved (217) is vertically
It is tightly attached to valve body (2) inner upper end and is gap-matched with ontology (218)；
The sensor (208) is by fixing device (2081), supporting rod (2082), top shell lid (2083), locking slot (2084), valve
Block (2085), clamping plate (2086), conveyer belt (2087), idler wheel (2088) composition；
The fixing device (2081) is horizontally fixed on locking slot (2084) left and right ends and welds together, the supporting rod
(2082) it is vertically arranged to valve block (2085) lower end and welds together with fixing device (2081), the top shell lid (2083)
Vertical to be nested in fixing device (2081) outer ring and using the mode that is interlocked, the locking slot (2084) is horizontally fixed on top shell
(2083) inside is covered, the valve block (2085) is embedded in locking slot (2084) inner upper end and vertically using interference fit, described
Clamping plate (2086) is horizontal internal through valve block (2085), and conveyer belt (2087) level is tightly attached to idler wheel (2088) side simultaneously
And with clamping plate (2086) using being mechanically connected, the idler wheel (2088) is horizontally fixed on top shell lid (2083) inside, the support
Bar (2082) is conllinear with spring (211) axle center.
2. a kind of steam trap connection for hydraulic engineering according to claim 1, it is characterised in that：The groove (4) is cut
Face is circular configuration and horizontal embedded paddle hole (5) inside.
3. a kind of steam trap connection for hydraulic engineering according to claim 1, it is characterised in that：The paddle hole
(5) it sets altogether there are two and is uniformly fixed on valve body (2) left and right ends and welds together.
4. a kind of steam trap connection for hydraulic engineering according to claim 1, it is characterised in that：The shaft-cup (8) with
Valve body (2) axle center is conllinear.
5. a kind of steam trap connection for hydraulic engineering according to claim 1, it is characterised in that：The valve body (2) with
Protective cover (9) is integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711379082.5A CN108194820A (en) | 2017-12-19 | 2017-12-19 | A kind of steam trap connection for hydraulic engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711379082.5A CN108194820A (en) | 2017-12-19 | 2017-12-19 | A kind of steam trap connection for hydraulic engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108194820A true CN108194820A (en) | 2018-06-22 |
Family
ID=62577147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711379082.5A Withdrawn CN108194820A (en) | 2017-12-19 | 2017-12-19 | A kind of steam trap connection for hydraulic engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108194820A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973809A (en) * | 2019-04-21 | 2019-07-05 | 李琼 | A kind of heat static force type drain valve and its assembly method |
-
2017
- 2017-12-19 CN CN201711379082.5A patent/CN108194820A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109973809A (en) * | 2019-04-21 | 2019-07-05 | 李琼 | A kind of heat static force type drain valve and its assembly method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20180622 |