CN113202950A - High-flow linkage gate type reversing valve and control method - Google Patents
High-flow linkage gate type reversing valve and control method Download PDFInfo
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- CN113202950A CN113202950A CN202110373733.XA CN202110373733A CN113202950A CN 113202950 A CN113202950 A CN 113202950A CN 202110373733 A CN202110373733 A CN 202110373733A CN 113202950 A CN113202950 A CN 113202950A
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- flow
- hole
- reversing valve
- gate
- rectifying
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
Abstract
The invention provides a high-flow linkage gate type reversing valve for pre-buried drip irrigation and a control method, wherein the interior of a converter box is divided into a water inlet rectifying cavity and a water return port rectifying cavity by a dividing plate, the water inlet rectifying cavity is communicated with a water inlet, and the water return port rectifying cavity is communicated with a water return port; the converter box is fixedly connected with the base plate through the middle partition plate, converter hole groups are correspondingly processed on the middle partition plate and the base plate, an upper-layer h-shaped rectifier tube and a lower-layer h-shaped rectifier tube which are arranged up and down are installed on the other side of the base plate, the upper-layer h-shaped rectifier tube and the lower-layer h-shaped rectifier tube are communicated with the converter hole groups, and a reversing valve device used for controlling the on-off of the converter hole groups is installed between the base plate and the middle partition plate. The reversing valve controls the two gate plates by utilizing the gear, the two gate plates move in opposite directions under the driving of the gear, and the synchronous closing and opening conversion of the four channels is realized, so that the flow direction conversion of the liquid circulation pipeline is realized.
Description
Technical Field
The invention relates to a high-flow linkage gate type reversing valve and a control method, and belongs to the technical field of valves.
Background
The reversing valve is widely applied to the fields of hydraulic control equipment, refrigeration and petrochemical engineering, however, in the construction process of large-volume concrete such as dams, bridges and the like, a large-flow water-flowing temperature-control circulating pipeline is adopted, and a large-flow reversing device is needed. The existing reversing valve has small flow, complex structure, large space occupied by crossing the flow channel trend and unstable liquid pressure in the reversing process, and is not suitable for a water-flowing temperature control system of large-volume concrete.
The reversing valve for the hydraulic control system introduced in the invention publication CN107965344A is complex in structure, and the design flow (400L/min) can not meet the requirement of a large-volume concrete water-flowing temperature control system. The rotary reversing valve introduced in the publication CN112324947A may cause flow channel blockage, large pressure fluctuation, and cycle interruption during the reversing process. The invention discloses a water supply joint adjusting system introduced in CN112211101A, and the reversing device is a circulating water supply pipeline reversing device widely applied in the field of current constructional engineering.
Disclosure of Invention
The invention aims to provide a high-flow linkage gate type reversing valve and a control method thereof.
In order to achieve the technical features, the invention is realized as follows: a high-flow linkage gate type reversing valve comprises a converter box, wherein the interior of the converter box is divided into a water inlet rectifying cavity and a water return port rectifying cavity through a dividing plate, the water inlet rectifying cavity is communicated with a water inlet, and the water return port rectifying cavity is communicated with a water return port; the converter box is fixedly connected with the base plate through the middle partition plate, converter hole groups are correspondingly processed on the middle partition plate and the base plate, an upper-layer h-shaped rectifier tube and a lower-layer h-shaped rectifier tube which are arranged up and down are installed on the other side of the base plate, the upper-layer h-shaped rectifier tube and the lower-layer h-shaped rectifier tube are communicated with the converter hole groups, and a reversing valve device used for controlling the on-off of the converter hole groups is installed between the base plate and the middle partition plate.
Bolt holes are processed on the periphery of the current conversion box, the middle partition plate and the base plate, and bolts penetrate through the bolt holes and are fixedly connected with the current conversion box, the middle partition plate and the base plate.
And the contact surfaces between the converter box and the middle clapboard and between the middle clapboard and the substrate are sealed by rubber pads.
The flow change hole set comprises a first flow change hole, a second flow change hole, a third flow change hole and a fourth flow change hole; the first flow conversion hole and the second flow conversion hole are communicated with the water inlet rectifying cavity, and the third flow conversion hole and the fourth flow conversion hole are communicated with the water return port rectifying cavity.
The reversing valve device comprises symmetrical and reverse symmetrically-arranged flashboards, the flashboards are arranged on guide grooves in the base plate in a sliding fit mode, racks are machined on the inner sides of the flashboards, gears are arranged between the racks on the two flashboards, the two racks are meshed simultaneously, and the gears are connected with a power device used for driving the gears to rotate.
The power device comprises a driver fixed on the outer side wall of the converter box, a driving connecting rod is installed at the output end of the driver, and the driving connecting rod is fixedly connected with the gear and drives the gear to rotate.
The driver is connected with the remote control device in a wireless or wired communication mode.
Two pipe orifices of the upper layer h-shaped rectifying pipe are respectively and correspondingly communicated with a first flow conversion hole and a fourth flow conversion hole of the flow conversion hole group; and two pipe orifices of the lower layer h-shaped rectifying pipe are respectively and correspondingly communicated with the second flow conversion hole and the third flow conversion hole of the flow conversion hole group.
The middle ribs are vertically arranged at the middle parts of the middle partition plate and the base plate and matched with the partition plate so as to prevent fluid from streaming in the tank.
The operation method of the high-flow linkage gate type reversing valve comprises the following steps that two gate plates respectively close a second flow changing hole and a fourth flow changing hole, the first flow changing hole and the third flow changing hole are in an open state, circulating water enters a water inlet rectifying cavity from a water inlet and then enters an upper h-shaped rectifying pipe from the first flow changing hole, and the circulating water enters a water return port rectifying cavity from a lower h-shaped rectifying pipe through the third flow changing hole and then returns to a refrigeration station from a water return port;
when the flow direction of the rectifier tube needs to be changed, the driver drives the driving connecting rod to rotate the gear anticlockwise, at the moment, the guide groove is matched with guide rails on two sides of the gate plate, the gate plate is limited to move in the guide groove 10, the gear 6 is meshed with racks on the side edge of the gate plate, the gate plate is driven to move in the opposite direction, finally, the second converter hole and the fourth converter hole are respectively opened by the two gate plates, the first converter hole and the third converter hole are closed, water in the water inlet rectifier cavity enters the lower-layer h-shaped rectifier tube from the second converter hole, circulated water enters the water return port rectifier cavity from the upper-layer h-shaped rectifier tube through the fourth converter hole, and finally returns to the refrigeration station from the water return port.
The invention has the following beneficial effects:
1. the invention utilizes a gear rack structure, has compact structure, small occupied space, stable fluid pressure in the reversing process, uninterrupted fluid, no need of changing the flow direction of an inlet channel and an outlet channel, convenient installation and can realize the fluid reversing of a large-flow pipeline by adopting a single driving device; the reversing valve is suitable for fluid reversing of large-flow pipelines, good in sealing performance, easy to process and produce, low in manufacturing cost and capable of being matched with an electric driver and the Internet of things to achieve remote and automatic control.
2. The two flashboards can be synchronously controlled by adopting the gear rack transmission mechanism to realize reverse symmetrical opening, so that the reversing of fluid is realized, and the control process is convenient and fast.
3. The rectifying tube adopting the h-shaped structure is connected with the water inlet rectifying cavity and the water return rectifying cavity, so that the switching and reversing of the fluid are facilitated.
Drawings
The invention is further illustrated by the following figures and examples.
Fig. 1 is an exploded view from a first perspective of the present invention.
Fig. 2 is an exploded view from a second perspective of the present invention.
Fig. 3 is an exploded view from a third perspective of the present invention.
FIG. 4 is a partial structural view of a substrate according to the present invention.
FIG. 5 is an enlarged view of a portion of the gear-rack engagement of section A of FIG. 1 according to the present invention.
FIG. 6 is a view showing the structure of a separator according to the present invention.
Fig. 7 is a structural view of the interior of the converter box of the present invention.
In the figure: the device comprises a flow conversion box 1, a water inlet 2, a water return port 3, a middle partition plate 4, a driving connecting rod 5, a gear 6, a gate 7, a guide rail 8, a rack 9, a guide groove 10, a partition plate 11, a bolt hole 12, a rubber pad 13, a middle rib 14, a driver 15, a water inlet rectifying cavity 16, a water return port rectifying cavity 17, a first flow conversion hole 18, a second flow conversion hole 19, a third flow conversion hole 20, a fourth flow conversion hole 21, a base plate 22, a lower-layer h-shaped rectifying pipe 23 and an upper-layer h-shaped rectifying pipe 24.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-7, a high-flow linkage gate type reversing valve comprises a converter box 1, wherein the interior of the converter box 1 is divided into a water inlet rectifying cavity 16 and a water return port rectifying cavity 17 by a dividing plate 11, the water inlet rectifying cavity 16 is communicated with a water inlet 2, and the water return port rectifying cavity 17 is communicated with a water return port 3; the converter box 1 is fixedly connected with a base plate 22 through a middle partition plate 4, converter hole groups are correspondingly processed on the middle partition plate 4 and the base plate 22, an upper-layer h-shaped rectifier tube 24 and a lower-layer h-shaped rectifier tube 23 which are vertically arranged are installed on the other side of the base plate 22, the upper-layer h-shaped rectifier tube 24 and the lower-layer h-shaped rectifier tube 23 are communicated with the converter hole groups, and a reversing valve device for controlling the on-off of the converter hole groups is installed between the base plate 22 and the middle partition plate 4. The reversing valve adopting the structure controls the two gate plates through the reversing valve device by utilizing the gear, the two gate plates move in opposite directions under the driving of the gear, and the synchronous closing and opening conversion of the four channels is realized, so that the flow direction conversion of the liquid circulation pipeline is realized, the liquid circulation does not need to be interrupted in the reversing process, and the pipeline pressure cannot be greatly influenced.
Further, bolt holes 12 are processed on the periphery of the converter box 1, the middle partition plate 4 and the base plate 22, and bolts are installed on the bolt holes 12 in a penetrating mode and fixedly connected with the three. Through foretell connection structure, guaranteed the reliability of switching-over valve structure, guaranteed its structural strength.
Further, the contact surfaces between the converter box 1 and the middle partition plate 4 and between the middle partition plate 4 and the base plate 22 are sealed by rubber gaskets 13. The rubber gasket ensures the sealing reliability between the components.
Further, the flow change hole group comprises a first flow change hole 18, a second flow change hole 19, a third flow change hole 20 and a fourth flow change hole 21; the first flow change hole 18 and the second flow change hole 19 are communicated with the water inlet rectification chamber 16, and the third flow change hole 20 and the fourth flow change hole 21 are communicated with the water return rectification chamber 17. The commutation can be realized by the plurality of commutation hole groups.
Further, the reversing valve device comprises symmetrically and reversely symmetrically arranged gate plates 7, the gate plates 7 are arranged on guide grooves 10 on a base plate 22 in a sliding fit mode, racks 9 are machined on the inner sides of the gate plates 7, a gear 6 is arranged between the racks 9 on the two gate plates 7, the gear 6 is enabled to be meshed with the two racks 9 at the same time, and the gear 6 is connected with a power device for driving the gear to rotate. The reversing valve device can synchronously drive the gate plate 7 to lift, thereby realizing fluid reversing. Through the gear rack transmission structure, the reliability and the stability of transmission are ensured.
Further, the power device comprises a driver 15 fixed on the outer side wall of the converter box 1, a driving connecting rod 5 is installed at the output end of the driver 15, and the driving connecting rod 5 is fixedly connected with the gear 6 and drives the gear to rotate. Through foretell power device, can be used for providing the switching-over power, in the course of the work, drive connecting rod 5 through driver 15, drive gear 6 through drive connecting rod 5 and rotate, and then cooperate with the rack on the flashboard through gear 6 to realize its lift action.
Further, the driver 15 is connected to a remote control device through a wireless or wired communication manner. By the control mode, the use convenience is enhanced.
Furthermore, two pipe orifices of the upper layer h-shaped rectifying pipe 24 are respectively and correspondingly communicated with the first flow change hole 18 and the fourth flow change hole 21 of the flow change hole group; two pipe orifices of the lower layer h-shaped rectifying pipe 23 are respectively communicated with the second flow change hole 19 and the third flow change hole 20 of the flow change hole group correspondingly. The structure arranged up and down can be matched with the commutation hole group conveniently.
Further, the middle ribs 14 are vertically arranged at the middle parts of the middle partition plate 4 and the base plate 22, and the middle ribs 14 are matched with the partition plates 11 to prevent fluid from streaming in the tank. A good separation is achieved by the intermediate ribs 14.
Further, grease with high viscosity is injected into the guide groove 10 and around the gear 6, so as to perform the functions of lubrication and sealing.
Example 2:
the operation method of the large-flow linkage gate type reversing valve comprises the steps that two gate plates 7 respectively close a second flow changing hole 19 and a fourth flow changing hole 21, a first flow changing hole 18 and a third flow changing hole 20 are in an open state, circulating water enters a water inlet rectifying cavity 16 from a water inlet 2 and then enters an upper layer h-shaped rectifying pipe 24 from the first flow changing hole 18, and the circulating water enters a water return port rectifying cavity 17 from a lower layer h-shaped rectifying pipe 23 through the third flow changing hole 20 and then returns to a refrigeration station from a water return port 3;
when the flow direction of the rectifying pipe needs to be changed, the driver 15 drives the driving connecting rod 5 to rotate the gear 6 anticlockwise, at this time, the guide groove 10 is matched with guide rails on two sides of the gate plate 7, the movement of the gate plate in the guide groove 10 is limited, the gear 6 is meshed with a rack on the side edge of the gate plate 7, the gate plate is driven to move in the opposite direction, finally, the two gate plates open the second flow change hole 19 and the fourth flow change hole 21 respectively, the first flow change hole 18 and the third flow change hole 20 are closed, water in the water inlet rectifying cavity 16 enters the lower-layer h-shaped rectifying pipe 23 from the second flow change hole 19, circulated water enters the water return port rectifying cavity 17 from the upper-layer h-shaped rectifying pipe 24 through the fourth flow change hole 21, and finally returns to the refrigeration station from the water return port 3.
Claims (10)
1. A high-flow linkage gate type reversing valve is characterized in that: the water inlet rectifying cavity (16) is communicated with the water inlet (2), and the water return port rectifying cavity (17) is communicated with the water return port (3); the utility model discloses a change of current case, including change of current case (1), flow box (1) and base plate (22), all correspond processing on well baffle (4) and base plate (22) and have the change of current punch combination, upper h type rectifying tube (24) and lower floor h type rectifying tube (23) that are arranged from top to bottom are installed to the opposite side of base plate (22), upper h type rectifying tube (24) and lower floor h type rectifying tube (23) are linked together with the change of current punch combination, install the switching-over valve device that is used for controlling change of current punch combination break-make between base plate (22) and well baffle (4).
2. The high-flow linkage gate type reversing valve according to claim 1, characterized in that: bolt holes (12) are machined in the peripheries of the converter box (1), the middle partition plate (4) and the base plate (22), and bolts penetrate through the bolt holes (12) and are fixedly connected with one another.
3. The high-flow linkage gate type reversing valve according to claim 2, characterized in that: the contact surfaces between the converter box (1) and the middle partition plate (4) and between the middle partition plate (4) and the base plate (22) are sealed through rubber pads (13).
4. The high-flow linkage gate type reversing valve according to claim 1, characterized in that: the flow change hole group comprises a first flow change hole (18), a second flow change hole (19), a third flow change hole (20) and a fourth flow change hole (21); the first flow change hole (18) and the second flow change hole (19) are communicated with the water inlet rectifying cavity (16), and the third flow change hole (20) and the fourth flow change hole (21) are communicated with the water return port rectifying cavity (17).
5. The high-flow linkage gate type reversing valve according to claim 1, characterized in that: the reversing valve device comprises symmetrically and reversely symmetrically arranged gate plates (7), the gate plates (7) are arranged on guide grooves (10) on a base plate (22) in a sliding fit mode, racks (9) are machined on the inner sides of the gate plates (7), gears (6) are arranged between the racks (9) on the two gate plates (7), the gears (6) are meshed with the two racks (9) simultaneously, and the gears (6) are connected with a power device for driving the gears to rotate.
6. The high-flow linkage gate type reversing valve according to claim 5, characterized in that: the power device comprises a driver (15) fixed on the outer side wall of the converter box (1), a driving connecting rod (5) is installed at the output end of the driver (15), and the driving connecting rod (5) is fixedly connected with the gear (6) and drives the gear to rotate.
7. The high-flow linkage gate type reversing valve according to claim 6, characterized in that: the driver (15) is connected with a remote control device in a wireless or wired communication mode.
8. The high-flow linkage gate type reversing valve according to claim 1, characterized in that: two pipe orifices of the upper layer h-shaped rectifying pipe (24) are respectively and correspondingly communicated with a first flow change hole (18) and a fourth flow change hole (21) of the flow change hole group; and two pipe orifices of the lower layer h-shaped rectifying pipe (23) are respectively and correspondingly communicated with the second flow change hole (19) and the third flow change hole (20) of the flow change hole group.
9. The high-flow linkage gate type reversing valve according to claim 1, characterized in that: the middle ribs (14) are vertically arranged at the middle parts of the middle partition plate (4) and the base plate (22), and the middle ribs (14) are matched with the partition plates (11) to prevent fluid from streaming in the tank.
10. The method for operating a high-flow linked gate-type directional control valve according to any one of claims 1 to 9, characterized in that:
the two gate plates (7) respectively close the second flow exchanging hole (19) and the fourth flow exchanging hole (21), the first flow exchanging hole (18) and the third flow exchanging hole (20) are in an open state, circulating water enters the water inlet rectifying cavity (16) from the water inlet (2) and then enters the upper-layer h-shaped rectifying pipe (24) from the first flow exchanging hole (18), and the circulated water enters the water return port rectifying cavity (17) from the lower-layer h-shaped rectifying pipe (23) through the third flow exchanging hole (20) and then returns to the refrigeration station from the water return port (3);
when the flow direction of the rectifying pipe needs to be changed, the driver (15) drives the driving connecting rod (5) to rotate the gear (6) anticlockwise, at the moment, the guide rail on the two sides of the guide groove (10) is matched with the guide rail on the two sides of the gate plate (7), the gate plate is limited to move in the guide groove (10), the gear (6) is meshed with the rack on the side edge of the gate plate (7), the gate plate is driven to move in the opposite direction, finally, the two gate plates respectively open the second flow switching hole (19) and the fourth flow switching hole (21), the first flow switching hole (18) and the third flow switching hole (20) are closed, water in the water inlet rectifying cavity (16) enters the lower-layer h-shaped rectifying pipe (23) from the second flow switching hole (19), and circulated water enters the water return-port rectifying cavity (17) from the upper-layer h-shaped rectifying pipe (24) through the fourth flow switching hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110373733.XA CN113202950B (en) | 2021-04-07 | 2021-04-07 | High-flow linkage gate type reversing valve and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110373733.XA CN113202950B (en) | 2021-04-07 | 2021-04-07 | High-flow linkage gate type reversing valve and control method |
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| Publication Number | Publication Date |
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| CN113202950A true CN113202950A (en) | 2021-08-03 |
| CN113202950B CN113202950B (en) | 2022-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110373733.XA Active CN113202950B (en) | 2021-04-07 | 2021-04-07 | High-flow linkage gate type reversing valve and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115321720A (en) * | 2022-08-16 | 2022-11-11 | 广东益诺欧环保股份有限公司 | Electrolytic device for industrial wastewater resource treatment |
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| WO2009152402A2 (en) * | 2008-06-13 | 2009-12-17 | Carrier Corporation | Four-way reversing valve |
| CN203948757U (en) * | 2014-07-28 | 2014-11-19 | 浙江汉姆森自控阀门有限公司 | One is changed straight journey hand automatic control check valve easily |
| CN105257895A (en) * | 2015-10-10 | 2016-01-20 | 河南科技大学 | Butterfly valve and jetting device comprising same |
| CN207921387U (en) * | 2018-03-16 | 2018-09-28 | 洛阳亚联重型机械有限公司 | A kind of two position and four-way reversing valves |
| CN214662229U (en) * | 2021-04-07 | 2021-11-09 | 中国长江三峡集团有限公司 | Large-traffic linkage floodgate formula switching-over valve |
-
2021
- 2021-04-07 CN CN202110373733.XA patent/CN113202950B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009152402A2 (en) * | 2008-06-13 | 2009-12-17 | Carrier Corporation | Four-way reversing valve |
| CN203948757U (en) * | 2014-07-28 | 2014-11-19 | 浙江汉姆森自控阀门有限公司 | One is changed straight journey hand automatic control check valve easily |
| CN105257895A (en) * | 2015-10-10 | 2016-01-20 | 河南科技大学 | Butterfly valve and jetting device comprising same |
| CN207921387U (en) * | 2018-03-16 | 2018-09-28 | 洛阳亚联重型机械有限公司 | A kind of two position and four-way reversing valves |
| CN214662229U (en) * | 2021-04-07 | 2021-11-09 | 中国长江三峡集团有限公司 | Large-traffic linkage floodgate formula switching-over valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115321720A (en) * | 2022-08-16 | 2022-11-11 | 广东益诺欧环保股份有限公司 | Electrolytic device for industrial wastewater resource treatment |
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| CN113202950B (en) | 2022-07-19 |
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