CN111076091B - High-lift constant-current feeding device - Google Patents
High-lift constant-current feeding device Download PDFInfo
- Publication number
- CN111076091B CN111076091B CN202010009899.9A CN202010009899A CN111076091B CN 111076091 B CN111076091 B CN 111076091B CN 202010009899 A CN202010009899 A CN 202010009899A CN 111076091 B CN111076091 B CN 111076091B
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- feeding
- flowmeter
- pump
- valve
- electric valve
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- 230000001276 controlling effect Effects 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 33
- 238000010992 reflux Methods 0.000 claims description 27
- 239000000243 solution Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011344 liquid material Substances 0.000 description 2
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
- F17D1/14—Conveying liquids or viscous products by pumping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/18—Arrangements for supervising or controlling working operations for measuring the quantity of conveyed product
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
Abstract
The invention relates to a high-lift constant-current feeding device which comprises a storage tank, a feeding pump, a feeding system and a frequency converter, wherein the feeding system is used for controlling the feeding amount of a feeding port; the feeding system comprises a first electric valve, a first flowmeter and a first PID controller, wherein a discharge hole of the storage tank, the feeding pump, the first electric valve and the first flowmeter are sequentially connected through a pipeline; the frequency converter is electrically connected with the dosing pump and the first PID controller and is used for controlling and adjusting the output quantity of the dosing pump; the first PID controller is electrically connected with the first electric valve and the first flowmeter, and is used for controlling and adjusting the first electric valve. According to the invention, the adding system and the frequency converter are arranged, so that the adding amount can be accurately controlled, the adding amount and the output quantity of the adding pump can be regulated according to the requirement, the accuracy of the adding amount can be ensured, and the excessive pressure in a pipeline can be avoided.
Description
Technical Field
The invention relates to the technical field of material feeding, in particular to a high-lift constant-current feeding device.
Background
The feeding device is mainly used for feeding materials to a specific place, and different feeding devices are specially arranged according to the shape of the fed materials, for example, a pipeline is required to be paved for feeding the materials from the storage tank to a specified place when the liquid materials are used. The more common device that is used for throwing in liquid material generally includes holding vessel, pump body and valve, opens valve and pump body, pumps the material in the holding vessel to the pipeline through the pump body, then throws the prescribed place again, like this hardly controls the dosage, needs more manual intervention moreover.
Disclosure of Invention
The invention aims to provide a high-lift constant-current feeding device which can accurately control feeding amount and effectively avoid overlarge pressure in a pipeline.
In order to achieve the above purpose, the invention provides a high-lift constant-current feeding device, which comprises a storage tank, a feeding pump, a feeding system and a frequency converter, wherein the feeding system is used for controlling the feeding amount of a feeding port;
The feeding system comprises a first electric valve, a first flowmeter and a first PID controller, wherein a discharge hole of the storage tank, the feeding pump, the first electric valve and the first flowmeter are sequentially connected through a pipeline;
the frequency converter is electrically connected with the dosing pump and the first PID controller and is used for controlling and adjusting the output quantity of the dosing pump;
The first PID controller is electrically connected with the first electric valve and the first flowmeter, and is used for controlling and adjusting the first electric valve.
Preferably, the dosing system is provided with a plurality of dosing systems.
Preferably, a reflux system is also included for refluxing the material in the pipeline to the storage tank.
Preferably, the reflux system comprises a second flowmeter, a second electric valve and a second PID controller, wherein the output end of the dosing pump, the second flowmeter, the second electric valve and the feed inlet of the storage tank are sequentially connected through pipelines, the second PID controller is electrically connected with the frequency converter, the second flowmeter and the second electric valve, and the second PID controller is used for controlling and adjusting the second electric valve.
Preferably, the system further comprises a pressure sensor, wherein the pressure sensor is arranged between the output end of the dosing pump and the second flowmeter, and the pressure sensor is electrically connected with the frequency converter.
Preferably, the system further comprises a pressure gauge arranged between the output end of the dosing pump and the second flowmeter.
Preferably, the reflux system further comprises a pressure relief valve, wherein the pressure relief valve is arranged between the second flowmeter and the feed inlet of the storage tank, and the pressure relief valve is connected with the second electric valve in parallel.
Preferably, the reflux system further comprises a gate valve disposed between the second flowmeter and the tank feed port, and the gate valve is connected in parallel with the second electrically operated valve.
Preferably, the device further comprises a check valve, wherein the check valve is arranged between a discharge port of the storage tank and an input end of the dosing pump.
Preferably, the automatic feeding device further comprises a reserved opening, wherein the reserved opening is arranged on one side of the feeding pump, and a valve for controlling the opening and closing of the reserved opening is arranged at the reserved opening.
According to the high-lift constant-current feeding device, the feeding system and the frequency converter are arranged, so that the feeding amount can be accurately controlled, the feeding amount and the output quantity of the feeding pump can be regulated according to requirements, the accuracy of the feeding amount can be ensured, and the excessive pressure in a pipeline can be avoided; the multiple feeding systems are arranged, so that one feeding pump can accurately control multiple feeding points, and when the feeding amount of one feeding point is changed, the output quantity of the feeding pump can be timely adjusted to ensure that each feeding port accurately feeds; the reflux system can effectively relieve pressure and protect equipment, so that the feeding device can be applied to feeding materials with high lift; the check valve can avoid the need of water injection or emptying every time the feeding pump is started, thereby reducing the operation procedures; the arrangement of the reserved opening can facilitate the operation of water injection and air exhaust.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As shown in fig. 1, the high-lift constant-current feeding device comprises a storage tank 1, a feeding pump 2, a feeding system 3 and a frequency converter 4, wherein the feeding system 3 is used for controlling the feeding amount of a feeding port;
The feeding system 3 comprises a first electric valve 31, a first flowmeter 32 and a first PID controller 33, and the discharge port 11 of the storage tank 1, the feeding pump 2, the first electric valve 31 and the first flowmeter 32 are sequentially connected through pipelines;
the frequency converter 4 is electrically connected with the dosing pump 2 and the first PID controller 33, and the frequency converter 4 is used for controlling and adjusting the output quantity of the dosing pump 2;
the first PID controller 33 is electrically connected to the first electrically operated valve 31 and the first flowmeter 32, and the first PID controller 33 is configured to control and regulate the first electrically operated valve 31.
Specifically, the storage tank 1 is used for storing materials, the discharge port 11 of the storage tank 1 is connected with the input end of the feeding pump 2 through a pipeline, the output end of the feeding pump 2 is connected with the input end of the first electric valve 31 through a pipeline, the output end of the first electric valve 31 is provided with the first flowmeter 32, the materials are fed to a specified position through the output end of the first electric valve 31, and the first flowmeter 32 is used for detecting the feeding amount at the specified position. The first PID controller 33 is electrically connected with the frequency converter 4, the first electric valve 31 and the first flowmeter 32, the first flowmeter 32 detects the amount of the added material, then the first PID controller 33 compares the detected amount of the added material with a set value, if there is a deviation, the first PID controller controls and adjusts the first electric valve 31 so that the amount of the added material is the same as the set value, and simultaneously controls the frequency converter 4 so that the frequency converter 4 adjusts the output value of the added pump 2, thereby ensuring that the amount of the added material can reach the set value, and the amount of the added material cannot be output too much, so that the pressure in a pipeline is too large.
The existing adding device needs to adjust the adding amount according to the requirement, so that the output value of the adding pump 2 is often increased in order to ensure that the adding amount can reach a set value, and the pressure in a pipeline is easily overlarge, so that damage is caused to some parts. By setting the adding system 3 and the frequency converter 4, the adding amount can be precisely controlled, the adding amount and the output of the adding pump 2 can be regulated according to the requirement, the accuracy of the adding amount can be ensured, and the excessive pressure in a pipeline can be avoided.
Further, the dosing system 3 is provided with a plurality of dosing systems.
In practical application, materials may need to be added to a plurality of places at the same time, so the technical scheme is provided with a plurality of adding systems 3, and each adding system 3 corresponds to the material adding of one place. Each adding system 3 can independently control the adding amount of a corresponding adding port, when the adding to a plurality of places is required, a PID controller on each adding system feeds back the adding amount set at the place to the frequency converter 4, the frequency converter 4 controls and regulates the output material of the adding pump 2, in order to realize that the adding amount of the plurality of adding ports can reach the set adding amount and stably add, the output quantity of the adding pump 2 should be slightly larger than the sum of the adding amounts of the plurality of adding ports, so that the adding amount of some adding ports cannot reach the set value due to loss is avoided. In the process of adding, if the adding amount of a certain adding port is changed and cannot be the same as the set value with the actual adding amount, at the moment, the adding amount of the adding port is controlled and regulated by a PID controller on the adding system, so that the adding amount of the adding port is consistent with the set value. In the process of adding, the adding amount of a certain adding port may need to be increased or decreased, at this time, the corresponding PID controller controls the corresponding electric valve to make the actual adding amount the same as the newly set adding value, at this time, the PID controller also needs to control the frequency converter 4 to make the frequency converter 4 adjust the output of the adding pump 2, so as to ensure that the adding amount of each adding port can reach a set value, and at the same time, ensure that the pressure in the pipeline is not too large.
The technical scheme is provided with a plurality of the feeding systems 3, so that one feeding pump 2 can accurately control a plurality of feeding points, and when the feeding amount of one feeding point changes, the output quantity of the feeding pump 2 can be timely adjusted to ensure accurate feeding of each feeding port; moreover, when the distance of the adding port is far away from the storage tank 1, the technical scheme greatly reduces hysteresis and improves the stability of material adding by controlling and adjusting the electric valve on the adding port and the adding pump 2 simultaneously.
Further, a reflux system 5 is included, wherein the reflux system 5 is used for refluxing the materials in the pipeline into the storage tank 1.
As described above, in order to ensure that the amount of the liquid to be fed reaches the set value, the output value of the feed pump 2 needs to be appropriately adjusted to be high, which may cause excessive pressure in the pipeline. Therefore, in order to avoid the excessive pressure in the pipeline, the technical scheme is provided with the reflux system 5, and when the excessive materials in the pipeline are recovered, the excessive materials can be refluxed into the storage tank 1 through the reflux system 5, so that the excessive pressure in the pipeline can be prevented from being excessive, and the excessive materials can be recycled. Because the material in the pipeline preferentially flows to the feeding port, the reflux pipe of the reflux device is lifted by a certain height, and the material is guaranteed to preferentially flow to the feeding port with lower horizontal height. When the high-lift feeding material is needed, the pressure in the pipeline tends to be larger, and the backflow system 5 is arranged in the technical scheme, so that pressure can be effectively relieved, and equipment is protected.
Further, the reflux system 5 includes a second flowmeter 51, a second electric valve 52 and a second PID controller 53, where the output end of the dosing pump 2, the second flowmeter 51, the second electric valve 52 and the feed inlet 12 of the storage tank 1 are sequentially connected through pipes, the second PID controller 53 is electrically connected with the frequency converter 4, the second flowmeter 51 and the second electric valve 52, and the second PID controller 53 is used for controlling and adjusting the second electric valve 52.
The reflux system 5 is connected in parallel with the feeding system 3, so that the second flowmeter 51 is connected with the output end of the feeding pump 2 through a pipeline, and then is sequentially connected with the second electric valve 52 and the feed inlet 12 of the storage tank 1 through a pipeline, and when the materials in the pipeline are excessive, part of the materials in the pipeline are refluxed into the storage tank 1 by opening the second electric valve 52. The second flowmeter 51 may detect the reflux amount, if the reflux amount is larger, it indicates that the output amount of the adding pump 2 is larger, at this time, the second PID controller 53 may control the frequency converter 4 to reduce the output amount of the adding pump 2, and the PID controller may also adjust the second electric valve 52 to increase the flux, so as to ensure that the redundant material can flow back into the storage tank 1 in time; when the reflux amount detected by the second flowmeter 51 is small, even zero, it indicates that the output of the dosing pump 2 may be insufficient to provide the sum of the dosing amounts of the respective dosing ports, and at this time, the PID controller may control the frequency converter 4 to increase the output of the dosing pump 2, so as to ensure that the dosing amount satisfying the respective dosing ports can reach the set value.
The reflux system 5 is the same as the structure and principle of the adding system 3, so that the adding device is convenient to set, and meanwhile, more importantly, the reflux system 5 can further ensure accurate adding of each adding port, and when the adding quantity changes, the adding device can be timely adjusted, and hysteresis is reduced.
Further, the device also comprises a pressure sensor 6, wherein the pressure sensor 6 is arranged between the output end of the dosing pump 2 and the second flowmeter 51, and the pressure sensor 6 is electrically connected with the frequency converter 4.
The pressure sensor 6 is used for detecting the pressure value in the pipeline and feeding back the detected pressure value to the frequency converter 4, so that the frequency converter 4 can adjust the output quantity according to the pressure value in the pipeline in time, and if the pressure value in the pipeline is too large, the output quantity is reduced, so that the pressure balance in the pipeline is ensured, and the damage to parts caused by the too large pressure is avoided; if the pressure in the pipeline is too small, the output quantity is increased, and enough materials are ensured to be fed by the feeding system 3.
Further, a pressure gauge 7 is further included, and the pressure gauge 7 is disposed between the output end of the dosing pump 2 and the second flowmeter 51.
The pressure gauge 7 is used for detecting and displaying the pressure value at the position, in the use process, when a proper pressure range exists in the pipeline, for example, when the pipeline is used at the beginning, the allowable pressure range value in the pipeline is set, then the adding device is operated, the pressure value in the pipeline at the moment can be checked through the pressure gauge 7, and if the adding device is operated normally at the moment and the numerical value displayed by the pressure gauge 7 is also in the allowable range, the adding device is indicated to be in a correct operation state. In the use, the staff also can look over the pressure value in the pipeline at any time through manometer 7, conveniently to the collection, the statistics and the contrast of this data.
Further, the reflux system 5 further includes a relief valve 54, the relief valve 54 is disposed between the second flowmeter 51 and the feed port 12 of the storage tank 1, and the relief valve 54 is connected in parallel with the second electrically operated valve 52.
When the pressure in the pipeline rises suddenly, the pressure release valve 54 is opened, and the second electric valve 52 is also in an opened state, so that the material in the pipeline can be conveyed into the storage tank 1 in a short time through the cooperation of the pressure release valve 54 and the second electric valve 52, and the pressure value in the pipeline is ensured to be within an allowable range.
Further, the reflux system 5 further includes a gate valve 55, the gate valve 55 is disposed between the second flowmeter 51 and the feed port 12 of the tank 1, and the gate valve 55 is connected in parallel with the second electrically operated valve 52.
The gate valve 55 is used as a manual valve, and is fixedly opened at a certain opening degree when in use, and a little material is refluxed, and also maintains at a certain opening degree when not applicable, so that when the dosing pump 2 is opened, a pipeline maintains a certain passage, and the dosing pump 2 is prevented from being blocked.
Further, the device also comprises a check valve 8, wherein the check valve 8 is arranged between a discharge port 11 of the storage tank 1 and an input end of the dosing pump 2.
When the pressure in the pipeline rises suddenly, the pressure release valve 54 is opened, and the second electric valve 52 is also in an opened state, so that the material in the pipeline can be conveyed into the storage tank 1 in a short time through the cooperation of the pressure release valve 54 and the second electric valve 52, and the pressure value in the pipeline is ensured to be within an allowable range.
Further, the feeding pump further comprises a reserved opening 9, the reserved opening 9 is arranged on one side of the feeding pump 2, and a valve 10 for controlling the feeding pump to open and close is arranged at the reserved opening 9.
Some pump bodies need to be filled with water and exhaust air when the starter is needed, the reserved opening 9 is designed to be convenient for operating the step, the valve 10 is opened when water is needed, and the valve 10 is kept closed when the feeding device is operated.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (6)
1. The utility model provides a high-lift constant current throw-in device which characterized in that: the device comprises a storage tank, a dosing pump, a dosing system and a frequency converter, wherein the dosing system is used for controlling the dosing amount of a dosing port;
The feeding system comprises a first electric valve, a first flowmeter and a first PID controller, wherein a discharge hole of the storage tank, the feeding pump, the first electric valve and the first flowmeter are sequentially connected through a pipeline;
the frequency converter is electrically connected with the dosing pump and the first PID controller and is used for controlling and adjusting the output quantity of the dosing pump;
The first PID controller is electrically connected with the first electric valve and the first flowmeter and is used for controlling and adjusting the first electric valve;
The system also comprises a reflux system, wherein the reflux system is used for refluxing the materials in the pipeline into the storage tank;
The reflux system comprises a second flowmeter, a second electric valve and a second PID controller, wherein the output end of the dosing pump, the second flowmeter, the second electric valve and the feed inlet of the storage tank are sequentially connected through pipelines, the second PID controller is electrically connected with the frequency converter, the second flowmeter and the second electric valve, and the second PID controller is used for controlling and regulating the second electric valve;
The reflux system further comprises a pressure relief valve, wherein the pressure relief valve is arranged between the second flowmeter and the feed inlet of the storage tank, and the pressure relief valve is connected with the second electric valve in parallel;
the backflow system further comprises a gate valve, wherein the gate valve is arranged between the second flowmeter and the storage tank feed inlet, and the gate valve is connected with the second electric valve in parallel.
2. The high-lift constant-current feeding device according to claim 1, wherein: the adding system is provided with a plurality of adding systems.
3. The high-lift constant-current feeding device according to claim 1, wherein: the device further comprises a pressure sensor, wherein the pressure sensor is arranged between the output end of the feeding pump and the second flowmeter, and the pressure sensor is electrically connected with the frequency converter.
4. The high-lift constant-current feeding device according to claim 1, wherein: the system further comprises a pressure gauge, wherein the pressure gauge is arranged between the output end of the feeding pump and the second flowmeter.
5. The high-lift constant-current feeding device according to claim 1, wherein: the device also comprises a check valve, wherein the check valve is arranged between the discharge port of the storage tank and the input end of the feeding pump.
6. The high-lift constant-current feeding device according to claim 1, wherein: the automatic feeding pump further comprises a reserved opening, wherein the reserved opening is arranged on one side of the feeding pump, and a valve for controlling the opening and the closing of the reserved opening is arranged at the reserved opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009899.9A CN111076091B (en) | 2020-01-06 | 2020-01-06 | High-lift constant-current feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010009899.9A CN111076091B (en) | 2020-01-06 | 2020-01-06 | High-lift constant-current feeding device |
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| Publication Number | Publication Date |
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| CN111076091A CN111076091A (en) | 2020-04-28 |
| CN111076091B true CN111076091B (en) | 2024-09-17 |
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| CN202010009899.9A Active CN111076091B (en) | 2020-01-06 | 2020-01-06 | High-lift constant-current feeding device |
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| CN (1) | CN111076091B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212107886U (en) * | 2020-01-06 | 2020-12-08 | 广州环投环境服务有限公司 | High-lift constant-current feeding device |
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| JP2565673B2 (en) * | 1985-04-04 | 1996-12-18 | 自動車機器 株式会社 | Flow control valve |
| JP3430013B2 (en) * | 1998-06-03 | 2003-07-28 | 住江織物株式会社 | Flow control device |
| JP2001165524A (en) * | 1999-12-08 | 2001-06-22 | Daikin Ind Ltd | Absorption refrigeration equipment |
| WO2008022672A1 (en) * | 2006-08-21 | 2008-02-28 | Joma-Hydromechanic Gmbh | Feed pump |
| CN201737808U (en) * | 2010-06-03 | 2011-02-09 | 北京城市排水集团有限责任公司 | Microenvironment synchronous denitrifying and dephosphorizing sewage treatment device with high sludge concentration |
| CN202322455U (en) * | 2011-11-29 | 2012-07-11 | 福州浩达智能科技有限公司 | Online frequency-conversion dosing system with closed-loop control |
| CN104338481B (en) * | 2013-08-01 | 2016-08-10 | 上海轻工业研究所有限公司 | Concentrated solution dilution apparatus and method |
| CN203809045U (en) * | 2013-10-31 | 2014-09-03 | 飞翼股份有限公司 | Filling pipeline system |
| CN203663785U (en) * | 2013-12-31 | 2014-06-25 | 东营市信义化工有限公司 | Automatic feeding and metering control device for anti-freezing liquid |
| CN205773579U (en) * | 2016-07-05 | 2016-12-07 | 河南智慧水务有限公司 | Sodium hypochlorite medicine adding device |
| CN207307781U (en) * | 2017-09-19 | 2018-05-04 | 南京益能环境工程有限公司 | A kind of high accuracy chemicals dosing plant |
| CN109250845A (en) * | 2018-11-16 | 2019-01-22 | 广州环投环境服务有限公司 | A kind of intelligent dispensing system |
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|---|---|---|---|---|
| CN106076221A (en) * | 2016-08-03 | 2016-11-09 | 湖北富邦科技股份有限公司 | The continuous production device of a kind of chemical fertilizer auxiliary agent and production method |
| CN212107886U (en) * | 2020-01-06 | 2020-12-08 | 广州环投环境服务有限公司 | High-lift constant-current feeding device |
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