CN113071929A - Air supply valve and air supply system for pneumatic powder conveying for removing blockage in advance - Google Patents
Air supply valve and air supply system for pneumatic powder conveying for removing blockage in advance Download PDFInfo
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- CN113071929A CN113071929A CN202110281040.8A CN202110281040A CN113071929A CN 113071929 A CN113071929 A CN 113071929A CN 202110281040 A CN202110281040 A CN 202110281040A CN 113071929 A CN113071929 A CN 113071929A
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- 239000000843 powder Substances 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 239000013589 supplement Substances 0.000 claims description 23
- 238000005070 sampling Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 15
- 238000010926 purge Methods 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000001502 supplementing effect Effects 0.000 description 50
- 238000000034 method Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000005273 aeration Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 206010037544 Purging Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
本发明公开了一种提前排堵的粉体气力输送用补气阀及补气系统，属于气力输送的技术领域。所述补气阀包括阀门体，所述阀门体为中空的腔体，阀门体内部设有阀芯和传压盖；阀门体上端设有阀盖；阀门体侧壁设有下游气体取样口、第一补气口和第二补气口，所述第一补气口连接有第一单向阀，所述第一单向阀连接有第一补气管道，所述第一补气管道连接有第二单向阀和减压阀，所述第二补气口连接有第二补气管道；阀门体下端设有导流板、输送管道连接孔和阀门基座，所述阀芯内部设有补气通道和排气通道，补气通道与排气通道在轴向方向错开，所述阀门基座侧壁设有补气出口。本发明的阀芯不易磨损，有效避免了阀体积灰堵塞，节省能源，节约维护成本，具有非常高的可靠性和实用性。
The invention discloses an air-supply valve and an air-supply system for powder pneumatic conveying capable of removing blockage in advance, and belongs to the technical field of pneumatic conveying. The air supply valve includes a valve body, the valve body is a hollow cavity, and a valve core and a pressure transmission cover are arranged inside the valve body; a valve cover is arranged at the upper end of the valve body; A first air supply port and a second air supply port, the first air supply port is connected with a first one-way valve, the first one-way valve is connected with a first air supply pipeline, and the first air supply pipeline is connected with a second One-way valve and pressure reducing valve, the second air supply port is connected with a second air supply pipeline; the lower end of the valve body is provided with a deflector, a conveying pipeline connection hole and a valve base, and the inside of the valve core is provided with an air supply channel and the exhaust channel, the air supply channel and the exhaust channel are staggered in the axial direction, and the side wall of the valve base is provided with an air supply outlet. The valve core of the invention is not easy to wear, effectively avoids the clogging of the valve volume, saves energy, saves maintenance costs, and has very high reliability and practicability.
Description
Technical Field
The invention relates to an air supply valve and an air supply system for powder pneumatic transmission for removing blockage in advance, and belongs to the technical field of pneumatic transmission.
Background
The pneumatic conveying is a mode of conveying solid particle materials by positive pressure or negative pressure airflow in a closed pipeline, and is widely applied to the industries of chemical industry, medicine, grain and the like. Pneumatic conveying has become one of the commonly used powder particle conveying methods because of its advantages of energy saving, environmental protection, flexible line, simple structure, quantitative conveying, etc. Pipeline blockage is one of the most common faults of the dense-phase positive-pressure pneumatic conveying system, and accounts for more than 40% of the fault rate of the pneumatic conveying system.
Pipeline blockage in the powder pneumatic conveying process can increase energy consumption of a pneumatic conveying system and even influence the normal operation of the conveying system. If the pipeline is blocked, the method for realizing dredging by increasing the pressure and the air displacement from the air source not only can compact the material bolt and prolong the blocking length, but also greatly increases the air consumption required by blocking removal. In order to solve the problem of powder pipe blockage, people often can install the air supply valve for the trunk line additional, and the purpose of dredging the pipeline is realized through the accurate control air supply valve opening and closing. Generally speaking, whether the pipe is blocked can be judged by the pressure in the conveying pipeline. The detection of the pressure signal is completed through a pressure transmitter or a pressure switch arranged on the conveying pipeline, the pressure signal is transmitted to a data collector of the automatic control device for processing, and then an electromagnetic valve for controlling the air compensating valve is started, so that the air compensating valve is opened, the process is complex, and the control cost is very high.
Patent publication No. CN101225897B discloses an automatic open-close blowing-assisting valve for pneumatic transmission, which can be automatically opened to remove blockage when a pipe is blocked in a transmission pipeline, and automatically closed after the blockage removal is completed. However, in the working process, powder easily enters the blowing-assisting valve from the connecting hole of the conveying pipeline, and causes abrasion to a piston, a connecting rod, an inner cavity and the like in the valve and even blocks the valve body.
Patent publication No. CN104097951A discloses an automatic pulse air inlet air supplementing valve for pneumatic transmission, which realizes blockage removal by making compressed air collapse at a blockage pipe through repeatedly opening and closing a main valve core. But only when the pipe is blocked, the pipe can be started to work, the pipe blocking phenomenon cannot be prevented, and energy is wasted.
Patent publication No. CN203255742U discloses a novel pneumatic conveying aeration valve, which automatically performs pulse aeration when a conveying pipeline is blocked, and automatically stops pulse aeration after the pipe blockage is removed. However, in the working process, the blockage removal can be carried out only when the conveying pipeline is completely blocked, so that the blockage removal effect is poor, the blockage cannot be removed in advance, and the great energy waste can be still caused. Therefore, it is necessary to develop an air supply device which can not only remove the blockage in advance, but also prevent the powder from entering the air supply valve to block the valve body.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an air supplementing valve and an air supplementing system for powder pneumatic conveying, which can be used for removing blockage in advance, and have the advantages of avoiding valve body dust accumulation blockage, dredging pipelines in time and saving energy.
The first purpose of the invention is to provide an air compensating valve for powder pneumatic transmission, which comprises a valve body, wherein the valve body is a hollow cavity, and a valve core and a pressure transmitting cover are arranged in the valve body; the upper end of the valve body is provided with a valve cover; the side wall of the valve body is provided with a downstream gas sampling port, a first gas supplementing port and a second gas supplementing port, the first gas supplementing port is connected with a first one-way valve, the first one-way valve is connected with a first gas supplementing pipeline, the first gas supplementing pipeline is connected with a second one-way valve and a pressure reducing valve, and the second gas supplementing port is connected with a second gas supplementing pipeline; the valve comprises a valve body, a valve core and a valve seat, wherein a guide plate, a conveying pipeline connecting hole and a valve seat are arranged at the lower end of the valve body, an air supplementing channel and an exhaust channel are arranged in the valve core, the air supplementing channel and the exhaust channel are staggered in the axial direction, an air supplementing outlet is formed in the side wall of the valve seat, a spring sleeve is arranged above the valve cover, an upper spring seat, an adjusting spring and a lower spring seat are arranged in the spring sleeve, and the lower spring seat is connected with a pressure transmitting cover through an upper connecting bolt.
In one embodiment of the present invention, a first inner cavity is further disposed inside the spring housing; a second inner cavity is arranged between the lower spring seat and the valve cover; a third inner cavity is arranged between the valve cover and the valve core, and a fourth inner cavity is arranged between the valve core and the pressure transmitting cover.
In one embodiment of the present invention, a fifth sealing ring is disposed between the pressure transmission cover and the valve body; a fourth sealing ring is arranged between the valve core and the valve body; a first sealing ring is arranged between the spring sleeve and the upper spring seat; a third sealing ring is arranged between the spring sleeve and the lower spring seat; and a second sealing ring is arranged between the upper connecting bolt and the valve cover.
In one embodiment of the invention, the cross section area of the spring sleeve is smaller than that of the valve cover, and the valve cover positioned outside the spring sleeve is provided with an exhaust hole; the valve cover at the inner side of the spring sleeve is provided with a balance channel.
In one embodiment of the present invention, the third cavity is communicated with the exhaust hole, the balance channel and the exhaust channel; the third cavity and the fourth cavity are communicated through an exhaust channel; the second inner cavity is communicated with the third cavity through a balance channel.
In one embodiment of the invention, an adjusting bolt is connected above the upper spring seat, and a locking nut is fixed on the adjusting bolt.
In one embodiment of the invention, the upper connecting bolt and the lower spring seat are fixed by an upper positioning nut, and the lower connecting bolt and the pressure transmission cover are fixed by a lower positioning nut.
In an embodiment of the invention, a gas purging inlet and a downstream gas inlet are arranged on two sides of the spring sleeve, the gas purging inlet is connected with the second one-way valve, and the first inner cavity is communicated with the gas purging inlet and the downstream gas inlet.
In an embodiment of the present invention, the cross-sectional areas of the first and second air supplement ports are larger than the cross-sectional area of the air supplement channel.
The invention also aims to provide an air supplementing system for powder pneumatic transmission, which applies the air supplementing valve for powder pneumatic transmission, and comprises at least two air supplementing valves, wherein the two air supplementing valves are connected through a sampling pipeline, and one end of the sampling pipeline is connected with a downstream gas inlet of one air supplementing valve; the other end of the sampling pipeline is connected with a downstream gas sampling port of another air compensating valve, and the air compensating valve is connected with an air compensating pipeline through a pressure reducing valve; and the air compensating valve is connected with the conveying pipeline through a conveying pipeline connecting hole.
Advantageous effects
1. The gas supplementing point and the gas at the downstream of the gas supplementing point of the gas supplementing system for powder pneumatic transmission, which are provided by the invention, can not enter the valve body, the valve core is not easy to wear, and the reliability of the whole gas supplementing valve is ensured.
2. When the pressure difference between the air replenishing point and the downstream air replenishing point reaches 100kPa, the invention judges that the pipeline between the two air replenishing points is about to be blocked, the valve core moves to the position for communicating the air replenishing channel with the first air replenishing pipeline and the second air replenishing pipeline, and the automatic air replenishing is started. When the pressure difference between the two air supply points is less than 100kPa, the valve core begins to return, and the air supply is finished. This helps to greatly reduce the amount of gas supply and reduce the cost.
3. The invention realizes the corresponding opening and closing action of the valve by judging the pressure difference between two air supply points, can open the valve to start air supply before the pipeline is blocked in the conveying pipeline, and can close the valve to finish air supply immediately after the pressure difference between the air supply points is lower than a set value. The process not only accurately controls the air supply amount, but also is beneficial to preventing the flow state of the conveyed materials in the conveying pipeline from being damaged, and ensures the stability of the conveying process.
4. After the material conveying is finished, the air pressure of the air supply pipeline is increased, the second one-way valve can be opened, dust blown into the first inner cavity from the downstream gas sampling port is swept, air is only supplied to the air supply pipeline in the sweeping stage, the cleaning of the interior of the spring sleeve is favorably maintained, the maintenance cost of the pneumatic conveying system is favorably reduced, and the practicability is very high.
5. The downstream gas of the present invention enters the downstream gas sampling port in a direction opposite to the material flow direction so there is less dust entering the first lumen, which helps to keep the first lumen clean.
6. The cross sectional areas of the first air supplementing port and the second air supplementing port of the air supplementing valve for powder pneumatic transmission, which is provided by the invention, are larger than the cross sectional area of the air supplementing channel, when the pressure difference is larger than 100kPa, the air supplementing channel can still be communicated with an air supplementing circuit of the air supplementing valve, and the reliability of air supplementing is ensured.
7. The air compensating valve for powder pneumatic transmission, which is provided by the invention, controls the valve core to move up and down by arranging the adjusting spring, so that the air compensating channel in the valve core can be communicated with or cut off from the first air compensating pipeline and the second air compensating pipeline according to pressure difference, the air compensating valve has very high practicability and low cost, saves energy, and conforms to the national strategy of energy conservation and emission reduction.
Drawings
Fig. 1 is a schematic structural view of an aeration valve for powder pneumatic transmission for removing blockage in advance.
FIG. 2 is a schematic structural diagram of the air supply system for pneumatic powder delivery for removing blockage in advance according to the present invention.
FIG. 3 is a sectional view of the valve core of the aeration valve for powder pneumatic transportation according to the present invention.
Wherein: 1. an air supply valve; 101. a baffle; 102. a downstream gas sampling port; 103. a sampling pipe; 104. a valve body; 105. a valve core; 106. a pressure reducing valve; 107. a first check valve; 108. a first air supplement port; 109. a first air supply duct; 110. a valve cover; 111. a balancing channel; 112. a second one-way valve; 113. a gas purge inlet; 114. a spring housing; 115. a first lumen; 116. a first seal ring; 117. locking the nut; 118. adjusting the bolt; 119. an upper spring seat; 120. adjusting the spring; 121. an upper positioning nut; 122. a downstream gas inlet; 123. a second seal ring; 124. a lower spring seat; 125. a third seal ring; 126. a second lumen; 127. an upper connecting bolt; 128. an exhaust hole; 129. a third lumen; 130. a second air supplement port; 131. a gas supply channel; 132. an exhaust passage; 133. a fourth seal ring; 134. a second air supply pipeline; 135. a fifth seal ring; 136. a pressure transmission cover; 137. an air supply outlet; 138. a lower connecting bolt; 139. a lower positioning nut; 140. a fourth lumen; 141. a delivery pipe connection hole; 142. a valve base; 2. an air supply pipeline; 3. a delivery conduit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings. The terms "inner" and "outer" are used to refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
An air compensating valve for powder pneumatic transmission for removing blockage in advance, as shown in figure 1, comprises a valve body 104, wherein the valve body 104 is a hollow cavity, and a valve core 105 and a pressure transmitting cover 136 are arranged inside the valve body 104; the upper end of the valve body 104 is provided with a valve cover 110, a third inner cavity 129 is arranged between the valve cover 110 and the valve core 105, and a fourth inner cavity 140 is arranged between the valve core 105 and the pressure transmitting cover 136; the side wall of the valve body 104 is provided with a downstream gas sampling port 102, a first gas supplementing port 108 and a second gas supplementing port 130, the first gas supplementing port 108 is connected with a first one-way valve 107, the first one-way valve 107 is connected with a first gas supplementing pipeline 109, a second one-way valve 112 is connected above the first gas supplementing pipeline 109, a pressure reducing valve 106 is connected below the first gas supplementing pipeline 109, and the second gas supplementing port 130 is connected with a second gas supplementing pipeline 134; the lower end of the valve body 104 is provided with a guide plate 101, a conveying pipeline connecting hole 141 and a valve base 142, the side wall of the valve base 142 is provided with an air supply outlet 137, and the guide plate 101 is used for stably and uniformly guiding compressed air passing through the air supply outlet 137 to the conveying pipeline connecting hole 141.
A fifth sealing ring 135 is arranged between the pressure transmission cover 136 and the valve body 104. An air replenishing channel 131 and an air exhausting channel 132 are arranged inside the valve core 105, as shown in fig. 3, the air replenishing channel 131 and the air exhausting channel 132 are staggered in the axial direction, the air replenishing channel 131 is used for communicating a first air replenishing pipeline 109 and a second air replenishing pipeline 134, and the cross-sectional areas of the first air replenishing port 108 and the second air replenishing port 130 are both larger than the cross-sectional area of the air replenishing channel 131. The third cavity 129 and the fourth cavity 140 are communicated through an exhaust passage 132; the exhaust channel 132 is connected to the outside air, and a fourth sealing ring 133 is disposed between the valve element 105 and the valve body 104. A spring sleeve 114 is arranged above the valve cover 110, the cross-sectional area of the spring sleeve 114 is smaller than that of the valve cover 110, and an exhaust hole 128 is formed in the valve cover 110 positioned on the outer side of the spring sleeve 114; the valve cover 110 at the inner side of the spring housing 114 is provided with a balance passage 111, and the third cavity 129 is communicated with the exhaust hole 128, the balance passage 111 and the exhaust passage 132.
A gas purging inlet 113 and a downstream gas inlet 122 are arranged on two sides of the spring sleeve 114, and the gas purging inlet 113 is connected with the second one-way valve 112; the spring housing 114 has a first interior cavity 115, an upper spring seat 119, an adjustment spring 120, and a lower spring seat 124 disposed therein. The first inner cavity 115 is communicated with the gas purge inlet 113 and the downstream gas inlet 122, a second inner cavity 126 is arranged between the lower spring seat 124 and the valve cover 110, and the second inner cavity 126 is communicated with the third cavity 129 through a balance passage 111. A first sealing ring 116 is arranged between the spring housing 114 and the upper spring seat 119, and a third sealing ring 125 is arranged between the spring housing 114 and the lower spring seat 124. An adjusting bolt 118 is connected above the upper spring seat 119, and a locking nut 117 is fixed on the adjusting bolt 118; the lower spring seat 124 is connected with the pressure transmitting cover 136 through an upper connecting bolt 127, a valve core 105 and a lower connecting bolt 138, the upper connecting bolt 127 and the lower spring seat 124 are fixed by an upper positioning nut 121, a second sealing ring 123 is arranged between the upper connecting bolt 127 and the lower spring seat 124 and the valve cover 110, and the lower connecting bolt 138 and the pressure transmitting cover 136 are fixed by a lower positioning nut 139.
Example 2
The embodiment provides an air supply system for powder pneumatic transmission, which is used for removing blockage in advance, and the air supply system applies the air supply valve for powder pneumatic transmission, which is provided by the embodiment 1, and is used for removing blockage in advance. As shown in fig. 2, the air supplement system for powder pneumatic transmission for early blockage removal comprises at least two air supplement valves 1, the two air supplement valves 1 are connected through a sampling pipeline 103, and one end of the sampling pipeline 103 is connected with a downstream gas inlet 122 of one air supplement valve 1; the other end of the sampling pipeline 103 is connected with a downstream gas sampling port 102 of the other gulp valve 1. The air compensating valve 1 is connected with an air compensating pipeline 2 through a pressure reducing valve 106; the gulp valve 1 is connected with the conveying pipeline 3 through a conveying pipeline connecting hole 141.
The working principle of the invention is as follows: before air supplement starts, an air supplement channel 131 in the valve core 105 is positioned below the first air supplement port 108 and the second air supplement port 130, when the pressure acting on the pressure transmission cover 136 is larger than the following forces (the gravity of the upper positioning nut 121, the lower spring seat 124, the upper connecting bolt 127, the valve core 105, the lower connecting bolt 138, the pressure transmission cover 136, the lower positioning nut 139 and other parts, the spring force of the adjusting spring 120 and the pressure of downstream gas acting on the lower spring seat 124), the valve core 105 moves upwards, the air supplement channel 131 is communicated with the first air supplement port 108 and the second air supplement port 130, and air supplement starts. During the gas filling process, the compressed gas is depressurized (reduced pressure equal to 100kPa) by means of a pressure reducing valve 106, leading to a first non-return valve 107 and a second non-return valve 112. The second check valve 112 conducts pressure greater than the pressure in the first make-up air line 109 and the first check valve 107 conducts pressure less than the pressure in the first make-up air line 109. The compressed gas enters the delivery pipe 3 through the pressure reducing valve 106, the first gas supplementing pipe 109, the first check valve 107, the gas supplementing passage 131, the second gas supplementing pipe 134, the gas supplementing outlet 137 and the delivery pipe connecting hole 141. When the pressure difference between the two air supply points is less than 100kPa, the valve core 105 moves downwards under the action of the spring force of the adjusting spring 120, the air supply line of the air supply valve 1 is disconnected, and air supply is finished. During the actuation of the gulp valve 1, the equalization channel 111 is used to equalize the pressure of the gas in the second chamber 126, the vent 128 is used to equalize the pressure of the gas in the third chamber 129, and the vent 132 is used to equalize the pressure of the gas in the fourth chamber 140.
The air supply pressure difference between the two air supply points can be set to be 100kPa, and the air supply pressure can be adjusted according to the opening degree of the pressure reducing valve 106 and can be 0-5 kPa greater than the pressure of the conveying pipeline 3. The opening pressure of the second check valve 112 is 10-50 kPa greater than that of the first check valve 107. The second check valve 112 opens at a pressure greater than the pressure in the first air make-up conduit 109 during pneumatic transport.
After the material is conveyed, the air pressure of the air supply pipeline 2 is increased, the second one-way valve 112 can be opened, and dust blown into the first inner cavity 115 from the downstream gas sampling port 102 is blown off. The purging stage only needs to supply air to the air supply pipeline 2, and is beneficial to reducing the maintenance cost of the pneumatic conveying system. The downstream gas enters the downstream gas sampling port 102 in a direction opposite to the material flow direction so there is less dust entering the first lumen 115, which helps to keep the first lumen 115 clean. The cross section areas of the first air supplementing opening 108 and the second air supplementing opening 130 which are in butt joint with the air supplementing channel 131 are larger than the cross section area of the air supplementing channel 131, when the pressure difference is larger than 100kPa, the air supplementing channel 131 can still be communicated with an air supplementing circuit of the air supplementing valve 1, and the air supplementing reliability is guaranteed.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281040.8A CN113071929B (en) | 2021-03-16 | 2021-03-16 | A kind of air supply valve and air supply system for powder pneumatic conveying with advance blockage removal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281040.8A CN113071929B (en) | 2021-03-16 | 2021-03-16 | A kind of air supply valve and air supply system for powder pneumatic conveying with advance blockage removal |
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| Publication Number | Publication Date |
|---|---|
| CN113071929A true CN113071929A (en) | 2021-07-06 |
| CN113071929B CN113071929B (en) | 2022-02-15 |
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| CN202110281040.8A Active CN113071929B (en) | 2021-03-16 | 2021-03-16 | A kind of air supply valve and air supply system for powder pneumatic conveying with advance blockage removal |
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| US4313699A (en) * | 1980-01-31 | 1982-02-02 | Dynamic Air Inc. | Quick mount high pressure booster valves |
| US20070095945A1 (en) * | 2005-02-11 | 2007-05-03 | Keudell Leopold V | Device for conveying coating powder and method for conveying powder with the conveying device |
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| Publication number | Publication date |
|---|---|
| CN113071929B (en) | 2022-02-15 |
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Effective date of registration: 20220623 Address after: 53-19-301, xiuxi Road, Wuxi City, Jiangsu Province, 214000 Patentee after: WUXI HOPE LIGHT INDUSTRY EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: 214000 1800 Lihu Avenue, Binhu District, Wuxi, Jiangsu Patentee before: Jiangnan University |
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