CN105600466A - Automatic pneumatic dredging valve - Google Patents
Automatic pneumatic dredging valve Download PDFInfo
- Publication number
- CN105600466A CN105600466A CN201510840704.4A CN201510840704A CN105600466A CN 105600466 A CN105600466 A CN 105600466A CN 201510840704 A CN201510840704 A CN 201510840704A CN 105600466 A CN105600466 A CN 105600466A
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- CN
- China
- Prior art keywords
- push rod
- spring
- valve
- passage
- sealing ring
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/042—Granular material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Check Valves (AREA)
- Multiple-Way Valves (AREA)
Abstract
An automatic pneumatic dredging valve comprises a valve body. A spring cavity, a mandrel cavity and a valve plate cavity are formed in the valve body. An end cover is installed at the end, provided with the valve plate cavity, of the valve body, a spring gland is installed at the end, provided with the spring cavity, of the valve body, the mandrel cavity is communicated with the valve plate cavity and the spring cavity, a valve plate is installed in the valve plate cavity and separates the valve plate cavity into a first chamber and a second chamber which are independent and are not communicated, a mandrel is installed in the mandrel cavity, a certain gap is formed between the mandrel and the mandrel cavity, a spring is installed in the spring cavity, the two ends of the spring are in contact with the spring gland and the mandrel respectively, one end of the mandrel is in contact with the valve plate, and the spring can provide reset force for the valve plate through the mandrel. The automatic pneumatic dredging valve is low in manufacturing and using cost and accurate and stable in running, and has the advantages of being large in instant inflating amount, high in responding speed and blocking removing efficiency, stable in running, simple in structure and convenient to machine and assemble.
Description
Technical field
The present invention relates to a kind of strength automatic dredging valve.
Background technology
, there is the frequent plugging of material in the granular material induction system of extensive use in the fields such as thermoelectricity, metallurgy, chemical industryProblem, at present solution to the problems described above is mostly on material conveying pipe, to install the height communicating with compressed air piping additionalThe body of calming the anger helps and blows valve, and in the time of plugging, this device is instantaneous is filled with a large amount of gases at high pressure in conveyance conduit, to blow away obstruction place thingMaterial, make to manage unimpeded, existing help to blow on valve all need there is independently checkout gear, make pressure liter to realize the plugging of timely detection materialHigh phenomenon, and control gases at high pressure and be blown into unimpeded, still, existing checkout gear has the following disadvantages: 1, it is all by structureComplicated, expensive electric elements form, and it is with high costs, and in addition, electric elements are not suitable with granule materials induction system workThe bad working environments environment of doing, fault rate is high; 2, its vent line is exposed to valve body outside, often occurs exposing pipe in useAging or the damaged normally problem of air feed in road, therefore, existing gases at high pressure help and blow valve and can not meet the actual of user and makeUse demand.
Summary of the invention
The object of this invention is to provide a kind of strength automatic dredging valve, its with low cost, stable and leakiness notGas, can fundamentally solve the problem that prior art exists.
The present invention for achieving the above object, is achieved through the following technical solutions: strength automatic dredging valve, comprise valve body,In valve body, offer spring cavity, push rod chamber and valve block chamber, valve body is provided with the one end in valve block chamber end cap is installed, and valve body is provided with bulletOne end mounting spring gland in spring chamber, push rod chamber respectively with valve block chamber and spring cavity UNICOM, in valve block chamber install valve block, valve block willValve block chamber is divided into two the first Room and the second Room that independence is obstructed, and push rod is installed in push rod chamber, has certain between push rod and push rod chamberGap, mounting spring in spring cavity, the two ends of spring contact with push rod with spring capping respectively, and one end and the valve block of push rod connectTouch, spring can provide reset force for valve block by push rod; In valve body, offer the first passage and the second passage, the second ventilationThe two ends in hole communicate with push rod chamber and the second Room respectively, the two ends of the first passage respectively with spring cavity and the second passage phaseLogical, on valve body, offer linked hole and dredge outlet, linked hole makes the first Room communicate with the external world, and dredge outlet is by push rod chamber and secondPassage communicates, and valve body or spring capping are offered air inlet; In push rod, offer scanty stomatal, the open rearward end of scanty stomatal and springChamber communicates, and the front opening of scanty stomatal is located on push rod sidewall, and push rod periphery is installed the first sealing ring, the second sealing ring and the 3rdSealing ring, the first sealing ring, the second sealing ring and the 3rd sealing ring are fixedly connected with push rod or valve body, and the 3rd sealing ring can be byDredge outlet and spring cavity cut off, and when push rod is positioned at foremost, the first sealing ring and the second sealing ring can be positioned at scanty stomatal front end and openThe both sides of mouth are sealed, and the front opening of scanty stomatal does not communicate with the first Room, promote push rod move to spring direction at valve blockIn process, scanty stomatal can communicate with dredge outlet, and the cross-sectional area of valve block is greater than the cross-sectional area of push rod.
In order further to realize object of the present invention, can also be by the following technical solutions: the periphery of described push rod is offeredThe first cannelure, the first cannelure between the first sealing ring and the second sealing ring, and with the front opening phase of scanty stomatalLogical, the periphery of described push rod is offered the second cannelure, and the second cannelure can communicate with the second passage and dredge outlet, described push rodIn chamber, offer the second cannelure, the second cannelure can communicate with the second passage and dredge outlet, offers the 3rd on described end capPassage, the 3rd passage communicates with the second passage, and the second passage communicates with the second Room by the 3rd passage, described valveOn door body, adjustment screw is installed, adjustment screw communicates with the first passage, to regulate the flow of the first passage, described valve bodyUpper installation air gauge, air gauge communicates with the first passage, and described spring capping is provided with external screw thread, spring capping and valve body spiral shellLine connects, and described push rod is connected with valve block, on the sidewall of described push rod, offers side opening, and side opening communicates with scanty stomatal, and push rod is positioned atWhen front end extreme position, scanty stomatal is between the first sealing ring and the second sealing ring.
The invention has the advantages that: it need not any electric elements, only utilize simple frame for movement really to realizeThe function of detection and automatic air blowing constantly, manufacturing cost and use cost is cheap, operation is precisely stable, and its inside is equipped with and is offered scanty stomatalPush rod, in the time of line clogging, it utilizes scanty stomatal UNICOM high-pressure air source and induction system, by high-pressure air source directly to delivery systemIn road under the overall leadership, be filled with a large amount of gases at high pressure, have that instantaneous aeration quantity is large, reaction speed is fast, unimpeded efficiency is high, stable, structure is simpleList and process advantage easy to assembly, in addition, it replaces external pipeline with built-in passage, can fundamentally stop pipeline easily oldChange or the problem of damaged gas leakage, guarantee normal air feed unimpeded.
Brief description of the drawings
Fig. 1 is the structural representation of strength automatic dredging valve of the present invention.
Reference numeral: 1 valve body 2 air inlet 3 spring capping 4 spring cavity 5 adjustment screw 6 first passage 7 gasPress table 8 the first cannelure 9 second passage 10 first sealing ring 11 the 3rd passage 12 valve block chamber 13 end cap 14 valve blocks15 push rod 16 first Room 17 second Room 18 linked hole 19 second sealing ring 20 scanty stomatal 21 second cannelure 22 dredge outlets23 push rod chamber 24 the 3rd sealing ring 25 spring 26 side openings.
Detailed description of the invention
As shown in Figure 1, strength automatic dredging valve of the present invention, comprises valve body 1, in valve body 1, offers spring cavity4, push rod chamber 23 and valve block chamber 12, valve body 1 is provided with the one end in valve block chamber 12 end cap 13 is installed, and valve body 1 is provided with spring cavity 4One end mounting spring gland 3, push rod chamber 23 respectively with valve block chamber 12 and spring cavity 4 UNICOMs, the interior installation valve block 14 in valve block chamber 12, valveValve block chamber 12 is divided into two the first Room 16 and the second Room 17 that independence is obstructed, the interior installation push rod 15 in push rod chamber 23, push rod by sheet 1415 and push rod chamber 23 between have certain interval so that push rod 15 moves axially and keeps the second Room 17 and induction system pipeline UNICOM,The interior mounting spring 25 of spring cavity 4, the two ends of spring 25 contact with push rod 15 with spring capping 3 respectively, one end of push rod 15 and valveSheet 14 contacts, and spring 25 can be by push rod 15 for valve block 14 provides reset force left, make valve block 14 all the time oriented end cap 13 moveMoving trend, the two ends of offering the first passage 6 and the second passage 9, the second passages 9 in valve body 1 respectively with push rod chamber23 and second Room 17 communicate, the two ends of the first passage 6 communicate with spring cavity 4 and the second passage 9 respectively, on valve body 1, openIf linked hole 18 and dredge outlet 22, linked hole 18 makes the first Room 16 communicate with the external world, hindered by airPower, dredge outlet 22 communicates with the second passage 9 by push rod chamber 23, and valve body 1 or spring capping 3 are offered air inlet 2, air inlet2 can be connected with high-pressure air source, and gases at high pressure are introduced to spring cavity 4, offer scanty stomatal 20 in push rod 15, and open the rear end of scanty stomatal 20Mouth communicates with spring cavity 4, and the front opening of scanty stomatal 20 is located on push rod 15 sidewalls, and push rod 15 peripheries are installed the first sealing ring10, the second sealing ring 19 and the 3rd sealing ring 24, the three sealing rings 24 cut off dredge outlet 22 and spring cavity 4, guarantee spring cavity 4All the time cannot only communicate with dredge outlet 22 by push rod chamber 23, when push rod 15 is positioned at foremost, the first sealing ring 10 and second is closeThe both sides that seal 19 can be positioned at scanty stomatal 20 front openings are sealed, and guarantee that 20 front openings only can communicate with dredge outlet 22,If the first sealing ring 10 and the second sealing ring 19 are fixed on push rod 15, the first sealing ring 10 and the second sealing ring 19 position all the timeFront opening in the both sides scanty stomatal 20 of scanty stomatal 20 front openings does not communicate with the first Room 16, promotes push rod 15 at valve block 14In spring 25 direction moving process, scanty stomatal 20 can communicate with dredge outlet 22, and now, a large amount of gases at high pressure can be successively through enteringGas port 2, spring cavity 4, scanty stomatal 20 and dredge outlet 22 are filled with in induction system pipeline, and moment blows obstruction material open, valve block 14Cross-sectional area be greater than the cross-sectional area of push rod 15.
In the time that induction system pipeline is normally worked, as shown in Figure 1, described dredge valve inner spring 25 passes through push rod 15 by valve block14 are pushed into left side extreme position, and now, gases at high pressure one tunnel is successively through air inlet 2, spring cavity 4, the first passage 6, second logicalPore 9, push rod chamber 23 and dredge outlet 22 enter induction system pipeline, and the tolerance entering is minimum; Another road successively through air inlet 2,Spring cavity 4, the first passage 6, the second passage 9 enter the second Room 17 and act on valve block 14, make valve block 14 have the spring of overcoming 25The trend that elastic force moves to right, during due to normal work, manifold pressure is less, and the second Room 17 internal pressures are less, therefore, high pressure gasBody cannot promote valve block 14 and drive push rod 15 to move right, and under this state, the front opening of scanty stomatal 20 cannot be arranged to dredge outlet 22Gas.
Once induction system pipeline stops up, obstruction place manifold pressure rises to the setting value of described dredge valve, thisTime, the air pressure in the second Room 17 enough promotes valve block 14 and drives push rod 15 Compress Springs 25 to move right, when push rod 15 moves toWhen the front opening of scanty stomatal 20 is communicated with dredge outlet 22, high-pressure air source can be passed through air inlet 2, spring cavity 4, scanty stomatal 20 andDredge outlet 22 is directly filled with obstruction place by instantaneous a large amount of gases at high pressure, the material of obstruction blown open, so that pipeline recovers is unimpeded,After pipeline is unimpeded, its internal pressure reduces to recover normal value, and the second Room 17 internal pressures reduce, and spring 25 can promote push rod 15 by valve block14 are pushed into left side extreme position again.
As shown in Figure 1, the periphery of described push rod 15 can be offered the first cannelure 8, the first cannelures 8 and is positioned at the first sealing ring10 and second between sealing ring 19, and communicates with the front opening of scanty stomatal 20, and the design of the first cannelure 8 can significantly reduceThe assembly difficulty of described dredge valve, and improve running precision and stability, if do not establish the first cannelure 8, one sides on push rod 15Face, when assembling push rod 15, must ensure that the front opening of scanty stomatal 20 is corresponding with dredge outlet 22, thereby, increase assembly difficulty,Time cost and the cost of labor of assembling are improved; On the other hand, in running, push rod 15 may be in push rod chamber 23There is the rotation of certain angle, once push rod 15 rotational angles greatly to make scanty stomatal 20 front opening cannot with dredge outlet 22 justWhile often communicating, can reduce the air-blowing quantity of described dredge valve to induction system pipeline, directly affect its unimpeded effect, in addition, firstCannelure 8 also can reduce the machining accuracy of push rod 15 and scanty stomatal 20, and while guaranteeing unimpeded, scanty stomatal 20 can be normal with dredge outlet 22Ventilation.
For reducing the machining accuracy in push rod chamber 23, as shown in Figure 1, the periphery of described push rod 15 is offered the second cannelure 21,The second cannelure 21 can communicate with the second passage 9 and dredge outlet 22, makes the logical of dredge outlet 22, the second passage 9, the second Room 17Road is unimpeded, ensures that the second Room 17 and the air pressure in induction system pipeline are consistent, thereby guarantees the reaction spirit of described dredge valveSensitivity.
In described push rod chamber 23, offer the second cannelure 21, the second cannelures 21 can with the second passage 9 and dredge outlet22 communicate, and the second cannelure 21 can guarantee that the second Room 17 equates with manifold pressure on the one hand, so that detection is in time to stopping up feelingsCondition, can be on the other hand scanty stomatal 20 and provides unimpeded gas circuit to dredge outlet 22.
For reducing machining accuracy, thereby cut down finished cost, as shown in Figure 1, on described end cap 13, offer the 3rd passage11, the three passages 11 communicate with the second passage 9, and the second passage 9 communicates with the second Room 17 by the 3rd passage 11, canMake gas act on better valve block 14.
As shown in Figure 1, on described valve body 1, adjustment screw 5 is installed, adjustment screw 5 communicates with the first passage 6, to adjustSave the gas flow of the first passage 6.
As shown in Figure 1, on described valve body 1, air gauge 7 is installed, air gauge 7 communicates with the first passage 6, with anti-in timeThe air pressure of answering described dredge valve, once operation irregularity appears in this dredge valve, staff can take emergency measures in time.
As shown in Figure 1, described spring capping 3 is provided with external screw thread, and spring capping 3 is threaded with valve body 1, passes through springThe initial elastic force of gland 3 adjustable springs 25.
As shown in Figure 1, described push rod 15 can be connected with valve block 14, to meet user's different requirements.
On the sidewall of described push rod 15, offer side opening 26, side opening 26 communicates with scanty stomatal 20, and push rod 15 is positioned at the front end limit, scanty stomatal 20 is between the first sealing ring 10 and the second sealing ring 19 when the position, and side opening 26 is dredged after can preventing that push rod 15 from rotatingPore 20 cannot be normally dredge outlet 22 air feed, and described side opening 26 can be multiple, to guarantee air demand.
Technical scheme of the present invention is not restricted in the scope of embodiment of the present invention, the not detailed description of the present inventionTechnology contents be known technology.
Claims (10)
1. strength automatic dredging valve, comprises valve body (1), it is characterized in that: in valve body (1), offer spring cavity (4), push rod chamberAnd valve block chamber (12) (23), valve body (1) is provided with the one end in valve block chamber (12) end cap (13) is installed, and valve body (1) is provided with springOne end mounting spring gland (3) in chamber (4), push rod chamber (23) respectively with valve block chamber (12) and spring cavity (4) UNICOM, valve block chamber(12) valve block (14) is installed in, and valve block chamber (12) are divided into two the first Room (16) and the second Room that independence is obstructed by valve block (14)(17), push rod (15) is installed in push rod chamber (23), between push rod (15) and push rod chamber (23), is had certain interval, peace in spring cavity (4)Shock mount (25), the two ends of spring (25) contact with push rod (15) with spring capping (3) respectively, one end and the valve block of push rod (15)(14) contact, spring (25) can provide reset force for valve block (14) by push rod (15); Valve body is offered the first passage in (1)(6) and the second passage (9), the two ends of the second passage (9) communicate with push rod chamber (23) and the second Room (17) respectively, and first is logicalThe two ends of pore (6) communicate with spring cavity (4) and the second passage (9) respectively, offer linked hole (18) and dredge on valve body (1)Port (22), linked hole (18) makes the first Room (16) communicate with the external world, and dredge outlet (22) is by push rod chamber (23) and the second ventilationHole (9) communicates, and valve body (1) or spring capping (3) are offered air inlet (2); In push rod (15), offer scanty stomatal (20), scanty stomatal(20) open rearward end communicates with spring cavity (4), and the front opening of scanty stomatal (20) is located on push rod (15) sidewall, push rod (15)Periphery is installed the first sealing ring (10), the second sealing ring (19) and the 3rd sealing ring (24), the first sealing ring (10), the second sealingCircle (19) is fixedly connected with push rod (15) or valve body (1) with the 3rd sealing ring (24), and the 3rd sealing ring (24) can be by dredge outlet(22) cut off with spring cavity (4), when push rod (15) is positioned at foremost, the first sealing ring (10) and the second sealing ring (19) can be positioned atThe both sides of scanty stomatal (20) front opening are sealed, and the front opening of scanty stomatal (20) does not communicate with the first Room (16), at valveSheet (14) promotes push rod (15) in spring (25) direction moving process, and scanty stomatal (20) can communicate with dredge outlet (22), valve block(14) cross-sectional area is greater than the cross-sectional area of push rod (15).
2. strength automatic dredging valve according to claim 1, is characterized in that: the periphery of described push rod (15) offers firstCannelure (8), the first cannelure (8) is positioned between the first sealing ring (10) and the second sealing ring (19), and and scanty stomatal(20) front opening communicates.
3. strength automatic dredging valve according to claim 1 and 2, is characterized in that: the periphery of described push rod (15) is offeredThe second cannelure (21), the second cannelure (21) can communicate with the second passage (9) and dredge outlet (22).
4. strength automatic dredging valve according to claim 1 and 2, is characterized in that: in described push rod chamber (23), offerThe second cannelure (21), the second cannelure (21) can communicate with the second passage (9) and dredge outlet (22).
5. strength automatic dredging valve according to claim 1 and 2, is characterized in that: on described end cap (13), offer the 3rdPassage (11), the 3rd passage (11) communicates with the second passage (9), and the second passage (9) is by the 3rd passage (11)Communicate with the second Room (17).
6. strength automatic dredging valve according to claim 1, is characterized in that: the upper installation of described valve body (1) regulates spiral shellNail (5), adjustment screw (5) communicates with the first passage (6), to regulate the flow of the first passage (6).
7. strength automatic dredging valve according to claim 1, is characterized in that: the upper air gauge of installing of described valve body (1)(7), air gauge (7) communicates with the first passage (6).
8. strength automatic dredging valve according to claim 1, is characterized in that: described spring capping (3) is provided with external screw thread,Spring capping (3) is threaded with valve body (1).
9. strength automatic dredging valve according to claim 1, is characterized in that: described push rod (15) connects with valve block (14)Connect.
10. strength automatic dredging valve according to claim 1, is characterized in that: on the sidewall of described push rod (15), offerSide opening (26), side opening (26) communicates with scanty stomatal (20), and when push rod (15) is positioned at front end extreme position, scanty stomatal (20) is positioned atBetween one sealing ring (10) and the second sealing ring (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510840704.4A CN105600466B (en) | 2015-11-27 | 2015-11-27 | Strength automatic dredging valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510840704.4A CN105600466B (en) | 2015-11-27 | 2015-11-27 | Strength automatic dredging valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105600466A true CN105600466A (en) | 2016-05-25 |
| CN105600466B CN105600466B (en) | 2017-12-08 |
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ID=55980919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510840704.4A Active CN105600466B (en) | 2015-11-27 | 2015-11-27 | Strength automatic dredging valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105600466B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861924A (en) * | 2019-11-15 | 2020-03-06 | 北京中电永昌科技有限公司 | Pneumatic ash conveying gas saving anti-blocking and abrasion control pilot valve |
| CN111674933A (en) * | 2020-06-22 | 2020-09-18 | 内蒙古磁谷电力节能设备有限公司 | Stifled automatic one-tenth of low pressure transport valve of treating |
| CN111720659A (en) * | 2020-06-29 | 2020-09-29 | 王凤明 | Mechanical automatic control range constant pressure dredging valve |
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| CN2481981Y (en) * | 2001-03-30 | 2002-03-13 | 李翊 | Dry ash transportation antiplugging mechanism for power station |
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| CN201729517U (en) * | 2010-05-14 | 2011-02-02 | 池州市大恒生化有限公司 | Device for dredging feeding pipeline |
| CN204038614U (en) * | 2014-08-04 | 2014-12-24 | 邹平创星环保设备有限公司 | A kind of overlength distance embolism formula air-transport system |
| CN104495385A (en) * | 2014-08-25 | 2015-04-08 | 邹平创星环保设备有限公司 | Pneumatic conveyor |
| CN205169838U (en) * | 2015-11-27 | 2016-04-20 | 邹平创星环保设备有限公司 | Automatic valve of dredging of strength |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2481981Y (en) * | 2001-03-30 | 2002-03-13 | 李翊 | Dry ash transportation antiplugging mechanism for power station |
| US20050058516A1 (en) * | 2003-08-19 | 2005-03-17 | Damien Gille | Device for the transport of granular solid particles with a controlled flow rate |
| CN201729517U (en) * | 2010-05-14 | 2011-02-02 | 池州市大恒生化有限公司 | Device for dredging feeding pipeline |
| CN204038614U (en) * | 2014-08-04 | 2014-12-24 | 邹平创星环保设备有限公司 | A kind of overlength distance embolism formula air-transport system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861924A (en) * | 2019-11-15 | 2020-03-06 | 北京中电永昌科技有限公司 | Pneumatic ash conveying gas saving anti-blocking and abrasion control pilot valve |
| CN110861924B (en) * | 2019-11-15 | 2020-06-16 | 北京中电永昌科技有限公司 | Pneumatic ash conveying gas saving anti-blocking and abrasion control pilot valve |
| CN111674933A (en) * | 2020-06-22 | 2020-09-18 | 内蒙古磁谷电力节能设备有限公司 | Stifled automatic one-tenth of low pressure transport valve of treating |
| CN111720659A (en) * | 2020-06-29 | 2020-09-29 | 王凤明 | Mechanical automatic control range constant pressure dredging valve |
| CN111720659B (en) * | 2020-06-29 | 2021-05-14 | 苏州巴涛信息科技有限公司 | Mechanical automatic control range constant pressure dredging valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105600466B (en) | 2017-12-08 |
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