CN112000142A - Non-contact pressure controller for pump - Google Patents
Non-contact pressure controller for pump Download PDFInfo
- Publication number
- CN112000142A CN112000142A CN202010789901.9A CN202010789901A CN112000142A CN 112000142 A CN112000142 A CN 112000142A CN 202010789901 A CN202010789901 A CN 202010789901A CN 112000142 A CN112000142 A CN 112000142A
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- Prior art keywords
- inlet pipe
- connecting pipe
- wall
- contact pressure
- pressure controller
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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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- 239000007788 liquid Substances 0.000 claims abstract description 54
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 229920002313 fluoropolymer Polymers 0.000 claims description 28
- 229920001971 elastomer Polymers 0.000 claims description 15
- 229920001903 high density polyethylene Polymers 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 description 7
- 238000003912 environmental pollution Methods 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/2026—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means with a plurality of throttling means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a non-contact pressure controller for a pump, which comprises a liquid inlet pipe, a connecting pipe and a junction box, wherein when pressure liquid is in the liquid inlet pipe, the liquid can act on an arc-shaped sealing ring in the liquid inlet pipe, the arc-shaped sealing ring deforms to conduct pressure to a push block, when the pressure is greater than the elastic force of a spring, the push block can be driven to move, the push block drives a movable rod to move backwards, a conductive joint on a conductive plate is contacted with an electric contact on an electric connection plate, a lead is connected, and an electromagnetic relay connected with the lead controls the circuit of a power control cabinet of the pump to be electrified as required.
Description
Technical Field
The invention relates to the technical field of controllers, in particular to a non-contact pressure controller for a pump.
Background
Chemical industry chemical liquid sometimes has been evacuated during the transportation, if the operator is not on site or not in time to shut down, the pump will be idle. The pump idling is very likely to cause failure, and particularly the magnetic pump needs to have a liquid to maintain internal circulation to cool the sliding bearing, and the magnetic pump is damaged if the pump idling is performed for a short time. In addition, if the separation sleeve of the magnetic pump is broken, chemical liquid can be leaked out to cause environmental pollution, so the petrochemical standard requires that the separation sleeve of the magnetic pump has secondary protection measures, but the bracket is arranged outside the separation sleeve of the magnetic pump, so the observation cannot be directly carried out, and even if the magnetic pump breaks down, the chemical liquid is actually leaked out from the pump cavity to cause the actual environmental pollution, and the remediation is difficult to carry out.
The prior art generally adopts a controller to prevent the accidents, at present, the first method for preventing the air freight from being frequently used is to prevent the air freight by setting the current maximum and minimum ranges when a pump runs through an electric control cabinet, the mode needs to increase a control cabinet protector and needs complex calculation to set a current value, the cost is high, the complexity is high, and a protector with smaller current cannot control some pumps when used at a small-flow point; the second one is to install the manometer on the support to warn and protect, but if the chemical liquid is strong acid or strong alkali, only can choose the manometer with diaphragm, the price is high and the precision is low, unfavorable to the actual use, for this reason, the invention provides a non-contact pressure controller for pump that can solve the above-mentioned problem.
Disclosure of Invention
The invention aims to provide a non-contact pressure controller for a pump, which solves the problems in the background technology by arranging a liquid inlet pipe, a connecting pipe and a junction box.
In order to achieve the purpose, the invention provides the following technical scheme: a non-contact pressure controller for a pump comprises a liquid inlet pipe, wherein a first flange and a second flange are fixedly connected to the left side and the right side of the liquid inlet pipe respectively, a liquid inlet pipe fluoroplastic layer is arranged on the inner wall of the liquid inlet pipe, and two ends of the liquid inlet pipe fluoroplastic layer extend outwards to be clamped with the first flange and the second flange; a third flange plate is fixedly connected to the left side of the connecting pipe and fixedly connected with the second flange plate through bolts, the right side of the connecting pipe is fixedly connected with an external thread joint, a movable hole is arranged in the external thread joint and is communicated with the connecting pipe, the left side of the connecting pipe is provided with a connecting pipe fluoroplastic layer, the left side of the connecting pipe fluoroplastic layer is provided with an arc-shaped sealing ring, a push block is arranged in the connecting pipe, the left side of the push block is in an arc shape and is matched with the right side of the arc-shaped sealing ring, the right side of the push block is connected with a movable rod which is arranged in the movable hole in a penetrating way and extends to the right side of the threaded joint, the right end of the movable rod is provided with a conductive plate, the upper end and the lower end of the right side of the conductive plate are fixedly connected with a conductive joint, a spring is wound on the movable rod, the left end of the spring is abutted against the right side of the push block, and the right end of the spring is abutted against the inner wall of the left side of the external thread joint; the junction box is in threaded connection with the external threaded connector in a threaded mode, two electricity connecting plates are arranged on the inner wall of the junction box, the left sides of the two electricity connecting plates are connected with electricity connecting contacts, the two electricity connecting contacts and the two conductive connectors are arranged on the same height in a clearance mode respectively, the two electricity connecting plates are connected with wires, and the two wires extend out of the junction box and are connected with an electromagnetic relay.
As a preferred technical solution of the present invention, the arc-shaped sealing ring is made of a corrosion-resistant rubber material.
As a preferred technical solution of the present invention, the fluoroplastic layer of the liquid inlet pipe is in clearance fit with the fluoroplastic layer of the connecting pipe, the outer wall of the arc-shaped sealing ring is connected with an outer ring, and two sides of the outer ring are respectively abutted to the fluoroplastic layer of the liquid inlet pipe and the fluoroplastic layer of the connecting pipe.
As a preferred technical scheme of the present invention, a first mounting hole is formed at a right end of the movable rod, a first fixing screw is screwed in the first mounting hole, and the conductive plate is inserted into a first fixing screw threaded column.
According to a preferable technical scheme of the invention, the left side wall and the right side wall of the current conducting plate are both connected with first plastic liners, the first plastic liner on the left side covers the outer wall of the left side of the current conducting plate and is abutted against the right end of the movable rod, and the first plastic liner on the right side covers the outer wall of the right side of the current conducting plate and wraps the first fixing screw threaded column.
As a preferable technical scheme of the invention, two second mounting holes are formed in the inner wall of the junction box, second fixing screws are screwed in the two second mounting holes, and the two power connection plates are arranged on the two second fixing screw threaded columns in a penetrating manner.
As a preferable technical scheme of the invention, the right sides of the two electric connection plates are connected with second plastic liners, and the second plastic liners cover the outer walls of the right sides and are abutted against the inner wall of the junction box.
According to a preferred technical scheme, the junction box is provided with threading holes matched with two wires, the two threading holes are internally provided with rubber sleeves, the outer walls of the rubber sleeves are fixedly connected with the inner walls of the threading holes, and the inner walls of the rubber sleeves are attached to the wires.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a non-contact pressure controller for a pump, which is characterized in that a liquid inlet pipe, a connecting pipe and a junction box are arranged, when pressure liquid is in the liquid inlet pipe, the liquid can act on an arc-shaped sealing ring in the liquid inlet pipe, the arc-shaped sealing ring deforms to conduct the pressure to a push block, when the pressure is larger than the elastic force of a spring, the push block can be driven to move, the push block drives a movable rod to move backwards, a conductive joint on a conductive plate is in contact with an electric contact on an electric connection plate, a lead is connected, and an electromagnetic relay connected with the lead controls the circuit of a power control cabinet of the pump to be electrified as required.
2. According to the non-contact pressure controller for the pump, due to the arrangement of the push block, the movable rod and the spring, when no liquid pressure exists in the liquid inlet pipe or the liquid pressure is too small, the push block has a distance with the junction box under the elastic force of the spring, so that a conductive joint on a conductive plate is prevented from contacting with an electric contact on an electric connection plate, the pump is prevented from being failed due to air transportation of the pump, and the chemical liquid is prevented from leaking to cause environmental pollution.
3. According to the non-contact pressure controller for the pump, the fluorine plastic layer of the liquid inlet pipe, the corrosion-resistant rubber arc-shaped sealing ring and the fluorine plastic layer of the connecting pipe are arranged, so that the controller is not damaged when a medium is corroded by strong acid and strong alkali liquid, and normal work is guaranteed.
Drawings
FIG. 1 is a schematic diagram of the connection relationship of the present invention;
FIG. 2 is a schematic structural view of a liquid inlet pipe according to the present invention;
FIG. 3 is a schematic structural diagram of a connecting tube according to the present invention;
FIG. 4 is a structural diagram of an arc-shaped sealing ring according to the present invention;
FIG. 5 is a schematic view of the connection of the push block, the movable rod and the spring according to the present invention;
FIG. 6 is a schematic view of the connection between the movable rod and the conductive plate according to the present invention;
FIG. 7 is a schematic view of the connection between the contact plate and the terminal box according to the present invention;
in the figure: 100. a liquid inlet pipe; 110. a first flange plate; 120. a second flange plate; 130. the fluoroplastic layer of the liquid inlet pipe; 200. a connecting pipe; 210. a third flange plate; 220. connecting a fluoroplastic layer of the pipe; 230. an externally threaded nipple; 231. a movable hole; 240. an arc-shaped sealing ring; 241. an outer ring; 250. a push block; 260. a movable rod; 261. a spring; 270. a first set screw; 280. a conductive plate; 281. a conductive joint; 290. a first plastic liner; 300. a junction box; 310. a rubber sleeve; 320. a wire; 330. a power connection plate; 331. connecting an electrical contact; 340. a second plastic liner; 350. and a second set screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
EXAMPLE 1
Referring to fig. 1-7, the present invention provides a technical solution: a non-contact pressure controller for a pump comprises a liquid inlet pipe, a connecting pipe 200 and a junction box 300, wherein the left side and the right side of the liquid inlet pipe are fixedly connected with a first flange plate 110 and a second flange plate 120 respectively, the inner wall of the liquid inlet pipe is provided with a liquid inlet pipe fluoroplastic layer 130, and two ends of the liquid inlet pipe fluoroplastic layer 130 extend outwards and are clamped with the first flange plate 110 and the second flange plate 120; a third flange plate 210 is fixedly connected to the left side of the connecting pipe 200, the third flange plate 210 is fixedly connected to the second flange plate 120 through bolts, an external thread joint 230 is fixedly connected to the right side of the connecting pipe 200, a movable hole 231 is formed in the external thread joint 230 and is communicated with the connecting pipe 200, a connecting pipe fluoroplastic layer 220 is arranged on the left side of the connecting pipe 200, an arc-shaped sealing ring 240 is arranged on the left side of the connecting pipe fluoroplastic layer 220, a push block 250 is arranged in the connecting pipe 200, the left side of the push block 250 is arc-shaped and is matched with the right side of the arc-shaped sealing ring 240, a movable rod 260 is connected to the right side of the push block 250, the movable rod 260 is arranged in the movable hole 231 in a penetrating manner and extends to the right side of the thread joint, a conductive plate 280 is arranged at the right end of the movable rod 260, a conductive joint 281 is; the junction box 300 is screwed on the external threaded joint 230, two power connection plates 330 are arranged on the inner wall of the junction box 300, the left sides of the two power connection plates 330 are connected with power connection contacts 331, the two power connection contacts 331 and the two conductive joints 281 are arranged at the same height in a clearance mode respectively, the two power connection plates 330 are connected with wires 320, and the two wires 320 extend out of the junction box 300 and are connected with an electromagnetic relay. The first flange 110 is flange-connected with the external pipeline, when there is pressure liquid in the liquid inlet pipe, the liquid will act on the arc sealing ring 240 in the liquid inlet pipe, the arc sealing ring 240 deforms to transmit the pressure to the push block 250, when the pressure is larger than the elastic force of the spring 261, the push block 250 will drive the push block 250 to move, the push block 250 will drive the movable rod 260 to move backwards, so that the conductive joint 281 on the conductive plate 280 contacts with the electric contact 331 on the electric plate 330, so that the conductive wire 320 is connected, at this time, the electromagnetic relay connected with the conductive wire 320 controls the circuit of the power control cabinet of the pump to be electrified according to the requirement, the controller has simple structure and low cost, is suitable for various flow pumps, and when there is no liquid pressure or the liquid pressure is too small in the liquid inlet pipe, the push block 250 has a distance with the junction box 300 under the elastic force of the spring 261, so as to avoid the conductive, avoid the pump air transportation to make the pump break down, lead to chemical liquid to reveal and lead to environmental pollution.
The controller can be designed into a mode that when liquid pressure exists in the liquid inlet pipe, the electromagnetic relay is electrified to enable the pump circuit to be started and the pump to work, or when liquid pressure exists in the liquid inlet pipe, the electromagnetic relay is electrified to trip and the pump is stopped, and the controller is installed according to actual use conditions.
Example 2
On the basis of implementation 1, please refer to fig. 1-7, the arc-shaped sealing ring 240 is made of corrosion-resistant rubber material, and may be made of fluororubber, the feed liquor pipe fluoroplastic layer 130 is in clearance fit with the connecting pipe fluoroplastic layer 220, the outer wall of the arc-shaped sealing ring 240 is connected with an outer ring 241, two sides of the outer ring 241 are respectively abutted to the feed liquor pipe fluoroplastic layer 130 and the connecting pipe fluoroplastic layer 220, the feed liquor pipe fluoroplastic layer 130 and the connecting pipe fluoroplastic layer 220 can be made of materials available in the existing market, so that the controller is not damaged when the strong acid and strong alkali liquid corrodes the medium, and normal operation is ensured, the arc-shaped sealing ring 240 is provided with the outer ring 241 so that the arc-shaped sealing ring 240 feed liquor.
Example 3
On the basis of implementation 1, please refer to fig. 1-7, a first mounting hole is formed at the right end of the movable rod 260, a first fixing screw 270 is screwed in the first mounting hole, the conductive plate 280 is arranged on the threaded column of the first fixing screw 270 in a penetrating manner, the left side wall and the right side wall of the conductive plate 280 are both connected with a first plastic liner 290, the first plastic liner 290 on the left side covers the outer wall on the left side of the conductive plate 280 and abuts against the right end of the movable rod 260, the first plastic liner 290 on the right side covers the outer wall on the right side of the conductive plate 280 and wraps the threaded column of the first fixing screw 270, the inner wall of the junction box 300 is provided with two second mounting holes, a second fixing screw 350 is screwed in the two second mounting holes, the two power connection plates 330 are arranged on the threaded columns of the two second fixing screws 350 in a penetrating manner, the right sides of the two power connection plates. The first and second fixing screws 270 and 350 allow the conductive plate 280 and the power receiving plate 330 to be stably coupled to the movable rod 260 and the inner wall of the junction box 300, thereby facilitating maintenance and repair of workers, and the first and second plastic gaskets 290 and 340 function to separate the conductive plate 280 and the power receiving plate 330 from the movable rod 260 and wiring and isolation.
Example 4
On the basis of implementation 1, please refer to fig. 1-7, a terminal box 300 is provided with threading holes matched with two wires 320, rubber sleeves 310 are arranged in the two threading holes, the outer walls of the rubber sleeves 310 are fixedly connected with the inner walls of the threading holes, the inner walls of the rubber sleeves 310 are attached to the wires 320, the rubber sleeves 310 protect the wires 320, the wires 320 are prevented from being worn and broken by the threading holes in the pulling process, the service life of the wires 320 is prolonged, the normal work of a controller is ensured, and the occurrence of safety accidents due to incapability of conducting electricity is avoided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A non-contact pressure controller for a pump, comprising:
the left side and the right side of the liquid inlet pipe are respectively and fixedly connected with a first flange plate and a second flange plate, the inner wall of the liquid inlet pipe is provided with a liquid inlet pipe fluoroplastic layer, and two ends of the liquid inlet pipe fluoroplastic layer extend outwards to be clamped with the first flange plate and the second flange plate;
a third flange plate is fixedly connected to the left side of the connecting pipe and fixedly connected with the second flange plate through bolts, the right side of the connecting pipe is fixedly connected with an external thread joint, a movable hole is arranged in the external thread joint and is communicated with the connecting pipe, the left side of the connecting pipe is provided with a connecting pipe fluoroplastic layer, the left side of the connecting pipe fluoroplastic layer is provided with an arc-shaped sealing ring, a push block is arranged in the connecting pipe, the left side of the push block is in an arc shape and is matched with the right side of the arc-shaped sealing ring, the right side of the push block is connected with a movable rod which is arranged in the movable hole in a penetrating way and extends to the right side of the threaded joint, the right end of the movable rod is provided with a conductive plate, the upper end and the lower end of the right side of the conductive plate are fixedly connected with a conductive joint, a spring is wound on the movable rod, the left end of the spring is abutted against the right side of the push block, and the right end of the spring is abutted against the inner wall of the left side of the external thread joint;
the junction box is in threaded connection with the external threaded connector in a threaded mode, two electricity connecting plates are arranged on the inner wall of the junction box, the left sides of the two electricity connecting plates are connected with electricity connecting contacts, the two electricity connecting contacts and the two conductive connectors are arranged on the same height in a clearance mode respectively, the two electricity connecting plates are connected with wires, and the two wires extend out of the junction box and are connected with an electromagnetic relay.
2. The non-contact pressure controller for pump according to claim 1, wherein the arc-shaped sealing ring is made of corrosion-resistant rubber material.
3. The non-contact pressure controller for pump according to claim 2, wherein the fluoroplastic layer of the inlet pipe is in clearance fit with the fluoroplastic layer of the connecting pipe, and the outer wall of the arc-shaped sealing ring is connected with an outer ring, and two sides of the outer ring are respectively abutted against the fluoroplastic layer of the inlet pipe and the fluoroplastic layer of the connecting pipe.
4. The non-contact pressure controller for the pump according to claim 1, wherein the right end of the movable rod is provided with a first mounting hole, a first fixing screw is screwed in the first mounting hole, and the conductive plate is inserted into a first fixing screw threaded column.
5. The non-contact pressure controller for pump according to claim 4, wherein the first plastic liner is connected to each of the left and right side walls of the conductive plate, the first plastic liner covers the outer wall of the left side of the conductive plate and abuts against the right end of the movable rod, and the first plastic liner covers the outer wall of the right side of the conductive plate and wraps the first fixing screw threaded post.
6. The non-contact pressure controller for the pump according to claim 5, wherein the inner wall of the junction box is provided with two second mounting holes, second fixing screws are screwed into the two second mounting holes, and the two power-on plates are inserted into the two second fixing screw threaded columns.
7. The non-contact pressure controller for pump according to claim 6, wherein a second plastic liner is connected to the right side of the two electric connection plates, and the second plastic liner covers the outer wall of the right side and abuts against the inner wall of the junction box.
8. The non-contact pressure controller for the pump according to claim 1, wherein the junction box is provided with threading holes matching with two wires, rubber sleeves are arranged in both the threading holes, outer walls of the rubber sleeves are fixedly connected with inner walls of the threading holes, and inner walls of the rubber sleeves are attached to the wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010789901.9A CN112000142B (en) | 2020-08-07 | Non-contact pressure controller for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010789901.9A CN112000142B (en) | 2020-08-07 | Non-contact pressure controller for pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112000142A true CN112000142A (en) | 2020-11-27 |
| CN112000142B CN112000142B (en) | 2024-06-28 |
Family
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19640897A1 (en) * | 1996-08-01 | 1998-02-05 | Binder Magnete | Solenoid valve with pressure compensation |
| KR20070117382A (en) * | 2006-06-08 | 2007-12-12 | 서울시립대학교 산학협력단 | Pressure sensor and apparatus for detecting leakage of pipe joint therewith |
| CN108398968A (en) * | 2018-04-25 | 2018-08-14 | 金川集团股份有限公司 | A kind of fiberglass hydrochloric acid tank automatic protecting control device |
| CN209084082U (en) * | 2018-11-20 | 2019-07-09 | 瑞安市三和阀门有限公司 | A kind of check valve of adjustable pressure |
| CN111102379A (en) * | 2019-12-30 | 2020-05-05 | 沈阳恒屹实业有限公司 | Multi-channel fluid controller |
| CN212391738U (en) * | 2020-08-07 | 2021-01-22 | 安徽龙泉泵阀制造有限公司 | Non-contact pressure controller for pump |
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19640897A1 (en) * | 1996-08-01 | 1998-02-05 | Binder Magnete | Solenoid valve with pressure compensation |
| KR20070117382A (en) * | 2006-06-08 | 2007-12-12 | 서울시립대학교 산학협력단 | Pressure sensor and apparatus for detecting leakage of pipe joint therewith |
| CN108398968A (en) * | 2018-04-25 | 2018-08-14 | 金川集团股份有限公司 | A kind of fiberglass hydrochloric acid tank automatic protecting control device |
| CN209084082U (en) * | 2018-11-20 | 2019-07-09 | 瑞安市三和阀门有限公司 | A kind of check valve of adjustable pressure |
| CN111102379A (en) * | 2019-12-30 | 2020-05-05 | 沈阳恒屹实业有限公司 | Multi-channel fluid controller |
| CN212391738U (en) * | 2020-08-07 | 2021-01-22 | 安徽龙泉泵阀制造有限公司 | Non-contact pressure controller for pump |
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