CN216383623U - Device for switching pipelines - Google Patents
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- CN216383623U CN216383623U CN202122692929.3U CN202122692929U CN216383623U CN 216383623 U CN216383623 U CN 216383623U CN 202122692929 U CN202122692929 U CN 202122692929U CN 216383623 U CN216383623 U CN 216383623U
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Abstract
The utility model relates to a device for switching pipelines. The device includes: the pressure detection meter is arranged on the pipeline and is used for detecting the pressure of the medium in the pipeline; outputting a corresponding pressure signal based on the pressure of the medium in the pipeline and a preset value of the pressure; an electric valve for being disposed on the duct and opening or closing the duct according to a control; and the control unit is used for being connected with the pressure detection meter and the electric valve and controlling the electric valve to open or close a pipeline according to the pressure signal so as to switch the pipeline. By using the scheme of the utility model, the automatic switching of pipelines can be realized, and the manpower resource is saved.
Description
Technical Field
The present invention relates generally to the field of pipeline switching. More particularly, the present invention relates to a device for pipe switching.
Background
Pipelines are devices for transporting gases, liquids or fluids with solid particles, coupled by pipes, pipe couplings and valves, etc., which are commonly used in water supply, drainage, heating, gas supply, long-distance transportation of oil and gas, agricultural irrigation, hydraulic engineering and various industrial devices. In each application scenario, in order to avoid pipeline failure to affect the production process, a dual pipeline system or a multi-pipeline system is generally adopted. However, the switching of the dual-pipeline system is generally performed manually, and a specially-assigned person needs to be arranged for duty, so that the automation degree is low, and the safety and the reliability are poor. At present, a Programmable Logic Controller ("PLC") is also used to switch a dual-pipeline system, but a debugger needs to have professional knowledge of the PLC, which is inconvenient for a general operator to operate. In addition, the number of integrated modules required for realizing the switching of the double-pipeline system is small, and the cost performance of the integrated modules designed independently is not high. Therefore, how to effectively realize the switching of the dual-pipeline system becomes a technical problem to be solved.
SUMMERY OF THE UTILITY MODEL
In order to solve at least one or more of the problems in the background art, the utility model provides a device for switching pipelines, which controls an electric valve to open or close the pipelines by detecting a pressure signal in the pipelines so as to realize automatic pipeline switching. Based on this, the present invention provides in various aspects various solutions as follows.
In one aspect, the present invention discloses an apparatus for pipe switching, comprising: a pressure detection gauge disposed on the pipe and detecting a pressure of a medium in the pipe; outputting a corresponding pressure signal based on the pressure of the medium in the pipeline and a preset value of the pressure; an electric valve for being disposed on the duct and opening or closing the duct according to a control; and the control unit is used for being connected with the pressure detection meter and the electric valve and controlling the electric valve to open or close a pipeline according to the pressure signal so as to switch the pipeline.
In one embodiment, the conduit comprises a first conduit and a second conduit, the electrically operated valve comprises a first electrically operated valve and a second electrically operated valve, and: the pressure detection meter is used for being arranged on the first pipeline and detecting a pressure signal corresponding to the pressure of the medium in the first pipeline reaching a preset value; the first electric valve is used for being arranged on the first pipeline and opening or closing the first pipeline according to control; and the second electric valve is used for being arranged at the connection part of the first pipeline and the second pipeline and opening or closing the second pipeline according to control.
In another embodiment, in controlling the electric valve to open or close the pipeline according to the pressure signal for pipeline switching, the control unit is further configured to: the pressure signal controls the first electric valve or the second electric valve to open or close the first pipeline or the second pipeline so as to switch the first pipeline and the second pipeline.
In a further embodiment, the pressure signal is a high level signal or a low level signal, and in the case that the pressure signal controls the first electrically operated valve or the second electrically operated valve to open or close the first pipeline or the second pipeline for switching between the first pipeline and the second pipeline, the control unit is further configured to: in response to the pressure signal being a high level signal, controlling the first electrically operated valve to open the first conduit and controlling the second electrically operated valve to close a second conduit to switch from the second conduit to the first conduit; or in response to the pressure signal being a low level signal, controlling the first electrically operated valve to close the first conduit and controlling the second electrically operated valve to open a second conduit to switch from the first conduit to the second conduit.
In yet another embodiment, the pressure sensing gauge comprises an electro-contact pressure gauge.
In yet another embodiment, the device further comprises a check valve for preventing backflow of the medium in the conduit.
In yet another embodiment, the check valve includes a first check valve and a second check valve, and: the first check valve is used for being arranged on the first pipeline and preventing the medium in the first pipeline from flowing back; and the second check valve is arranged at the joint of the first pipeline and the second pipeline and prevents the medium in the second pipeline from flowing back.
In yet another embodiment, the apparatus further comprises an indicator light for displaying a switching state of the first and second ducts.
In yet another embodiment, the apparatus further comprises a relay for making the time delay determination.
In yet another embodiment, the relay is connected to the control unit, and the control unit is further configured to: and controlling the first electric valve or the second electric valve to delay according to the delay judgment result of the relay so as to open or close the first pipeline or the second pipeline.
According to the scheme of the utility model, the electric valve is controlled to open or close the pipeline according to the pressure signal in the pipeline output by the pressure detection meter, so that the pipeline is switched automatically, and the human resource is saved. Furthermore, the embodiment of the utility model also prevents the medium from flowing backwards by arranging the check valve and performs time delay judgment by arranging the relay so as to delay the opening or closing of the control electric valve to protect the control circuit, thereby ensuring the safety and reliability of pipeline switching. In addition, the embodiment of the utility model is also provided with an indicator light so as to display the switching state of the pipeline.
Drawings
The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the disclosure are illustrated by way of example and not by way of limitation, and like or corresponding reference numerals indicate like or corresponding parts and in which:
fig. 1 is a block diagram illustrating an exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention;
fig. 2 is a block diagram illustrating another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention;
FIG. 3 is an exemplary diagram illustrating an apparatus for pipe switching according to an embodiment of the present invention;
fig. 4 is a block diagram showing still another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention;
fig. 5 is a block diagram illustrating still another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention; and
FIG. 6 illustrates an exemplary circuit schematic of an apparatus for pipe switching according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.
Fig. 1 is a block diagram illustrating an exemplary structure of an apparatus 100 for pipe switching according to an embodiment of the present invention. As shown in fig. 1, the apparatus 100 may include a pressure detection gauge 101, an electric valve 102, and a control unit 103. The foregoing pressure detection gauge 101, the electric valve 102, and the control unit 103 will be described in detail, respectively.
In one embodiment, the pressure detection table 101 may be disposed on a pipe and may be used to detect the pressure of a medium in the pipe and output a corresponding pressure signal based on the pressure of the medium in the pipe and a preset value thereof. As is known from the description of the background art, a pipe is a device for transporting a gas, a liquid or a fluid with solid particles, which is connected by pipes, pipe couplings, valves, etc., whereby the medium in the pipe can be for example water or gas. In one implementation scenario, the aforementioned pressure detection meter may be, for example, an electric contact pressure gauge, which may detect the pressure of water or gas in the pipeline and output a corresponding pressure signal based on a preset value thereof (i.e., an action value of the electric contact pressure gauge). For example, assuming that the preset value of the electro-contact pressure gauge is 0.3MPa, when the pressure of water or gas in the pipeline is detected to be less than or equal to 0.3MPa, the electro-contact pressure gauge may output a corresponding pressure signal (e.g., a high level signal or a low level signal). In some embodiments, the aforementioned pipe may include a first pipe and a second pipe, and the aforementioned pressure detection gauge may be disposed on the first pipe. In one exemplary scenario, the aforementioned first conduit may be, for example, a purified water conduit to provide a source of purified water. The aforementioned second conduit may be, for example, an ultrafiltrate water conduit to provide a source of ultrafiltrate water.
In one embodiment, the electric valve 102 may be adapted to be arranged on a pipe and may be adapted to open or close the pipe according to a control. In one implementation scenario, the electric valve may comprise a first electric valve and a second electric valve, and the first electric valve may be arranged on the above-mentioned first pipe (e.g. the purified water pipe) to open or close the first pipe according to a control. The aforementioned second electric valve may be disposed at a junction of the aforementioned first pipe and second pipe (e.g., at a junction of the purified water pipe and the ultrafiltration water pipe) to open or close the second pipe according to a control. The layout of the aforementioned first and second electrically operated valves will be described in detail later in connection with fig. 3.
In one embodiment, the control unit 103 may be connected to the pressure detection meter and the electric valve, and is configured to control the electric valve to open or close the pipeline according to the pressure signal output by the pressure detection meter, so as to realize switching of the pipeline. Specifically, the control unit may be configured to control the first electric valve or the second electric valve to open or close the first pipe or the second pipe according to the pressure signal, so as to switch the first pipe and the second pipe. As can be seen from the foregoing, the pressure signal may be a high level signal or a low level signal, for example, a high level pressure signal output by the pressure detection meter when the pressure of the medium in the pipeline is less than a preset value. On the contrary, when the pressure of the medium in the pipeline is larger than or equal to the preset value, the pressure detection meter outputs a low-level pressure signal. In one implementation scenario, in response to the pressure signal being a high level signal, the control unit may be configured to control the first electrically operated valve to open the first duct and control the second electrically operated valve to close the second duct to switch from the second duct to the first duct. In response to the pressure signal being a low level signal, the control unit may be configured to control the first electrically operated valve to close the first duct and control the second electrically operated valve to open the second duct to switch from the first duct to the second duct. In some embodiments, the control unit may be implemented by a control circuit (e.g., as shown in fig. 6).
As can be seen from the above description, according to the embodiment of the present invention, the pressure of the medium in the pipeline is detected by using, for example, the electric contact pressure gauge, and the corresponding pressure signal is output, and then the control unit controls the electric valve to open or close the pipeline according to the pressure signal, so that the pipeline is switched automatically, and human resources are saved. In addition, the device provided by the embodiment of the utility model has a simpler structural principle and is convenient for workers to debug.
In one embodiment, the pipe switching device of the embodiment of the utility model may further include a check valve, and the check valve may be used for preventing the medium in the pipe from flowing back to cause a safety hazard. The check valve will be described in detail below in conjunction with fig. 2.
Fig. 2 is a block diagram illustrating another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention. As shown in fig. 2, the apparatus for pipe switching of the present invention may include a pressure detection gauge 101, an electric valve 102, a control unit 103, and a check valve 201. In some embodiments, the check valve 201 may include a first check valve and a second check valve. As mentioned above, the pressure detection meter may be configured to detect a pressure of a medium in the pipe and output a corresponding pressure signal based on a preset value, the electric valve may be configured to open or close the pipe according to a control, and the control unit may control the electric valve to open or close the pipe according to the pressure signal output by the pressure detection meter, thereby implementing switching of the pipe.
In one embodiment, the check valve 201 described above may also be arranged on the pipe to prevent the medium in the pipe from flowing back. In one application scenario, the check valve is arranged after the electric valve, i.e. the medium in the pipe passes through the electric valve before passing through the check valve (e.g. as shown in fig. 3). In some embodiments, the first check valve may be arranged on the first conduit and configured to prevent backflow of the medium in the first conduit. The above-mentioned second check valve may be disposed at a junction of the first pipe and the second pipe, and serves to prevent a medium in the second pipe from flowing backward. The pipe switching device according to the embodiment of the present invention will be described in detail with reference to fig. 3.
Fig. 3 is an exemplary schematic diagram illustrating an apparatus for pipe switching according to an embodiment of the present invention. It is to be understood that fig. 3 is a specific implementation of the apparatus for pipe switching in fig. 2 described above, and therefore the description made above with respect to fig. 2 is equally applicable to fig. 3.
As shown in fig. 3, the pipe switching apparatus of the embodiment of the present invention exemplarily shows a purified water pipe 301 and an ultrafiltration water pipe 302 (i.e., a first pipe and a second pipe), and an electro-contact pressure gauge 303 (i.e., the above-described pressure detection gauge) and a first electric valve 304 and a first check valve 305 are sequentially disposed on the purified water pipe 301. Further, a second electric valve 306 and a second check valve 307 are sequentially disposed on a junction of the purified water pipe 301 and the ultrafiltration water pipe 302. In the embodiment of the present invention, the pressure of the purified water in the purified water pipe 301 is detected by the electro-contact pressure gauge 303, and when the pressure of the purified water is less than a preset value (e.g., 0.3MPa), the electro-contact pressure gauge 303 outputs a corresponding high level signal. Then, the control unit (not shown in the figure) controls the first electric valve 304 to open the purified water pipe 301 and controls the second electric valve 306 to close the ultra-filtration water pipe 302 according to the high level signal, thereby switching the pipe from the ultra-filtration water pipe 302 to the purified water pipe 301. When the pressure of the purified water is greater than or equal to a preset value (e.g., 0.3MPa), the electric contact pressure gauge 303 outputs a corresponding low level signal. The aforementioned control unit (not shown in the figure) controls the first electric valve 304 to close the purified water pipe 301 and controls the second electric valve 306 to open the ultra-filtered water pipe 302 according to the low level signal, thereby switching from the purified water pipe 301 to the ultra-filtered water pipe 302. In the aforementioned opening and closing of the purified water pipe 301 and the ultrafiltration water pipe 302, the aforementioned first check valve 305 and second check valve 307 are used to prevent the water flow in the purified water pipe 301 and the ultrafiltration water pipe 302 from flowing backward, for example, from right to left as shown in the drawing.
In one embodiment, the pipe switching apparatus of the present invention may further include an indicator light, which may be used to display a switching state of the first pipe and the second pipe. The indicator light will be described in detail below in conjunction with fig. 4.
Fig. 4 is a block diagram illustrating still another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention. As shown in fig. 4, the apparatus for duct switching of the present invention may include a pressure detection gauge 101, an electric valve 102, a control unit 103, a check valve 201, and an indicator lamp 401. The control unit can be used for controlling the electric valve to open or close the pipeline according to the pressure of the medium in the pipeline detected by the pressure detection meter and outputting a corresponding pressure signal so as to switch the pipeline, and the switching state of the pipeline is displayed through the indicator lamp. Furthermore, a check valve is arranged to prevent the medium in the pipeline from flowing backwards to cause safety accidents when the electric valve opens or closes the pipeline.
In one implementation scenario, the indicator lights may include red and green lights, and are typically disposed outside of, for example, a water meter box, for indicating the switching status of the pipes. For example, the first duct or the second duct may be turned off by a red light, and the first duct or the second duct may be turned on by a green light.
In one embodiment, the pipe switching device of the present invention may further include a relay for delaying the determination. The relay will be described in detail below with reference to fig. 5.
Fig. 5 is a block diagram illustrating still another exemplary structure of an apparatus for pipe switching according to an embodiment of the present invention. As shown in fig. 5, the apparatus for pipe switching of an embodiment of the present invention may include a pressure detection gauge 101, an electric valve 102, a control unit 103, a check valve 201, an indicator lamp 401, and a relay 501. The pressure detecting gauge 101, the electric valve 102, the control unit 103, the check valve 201, and the indicator 401 can refer to the description of fig. 4, and the description of the present invention is omitted here.
In one embodiment, the relay 501 may be, for example, a time relay to perform a time delay determination, so as to avoid an error caused by medium fluctuation in the pipeline. The control unit may control the first electric valve or the second electric valve to delay to open or close the first pipeline or the second pipeline based on the delay determination result of the relay, so as to protect the circuit. For example, when the pressure signal output by the pressure detection meter lasts for 60s and is a high level signal (namely the pressure of the medium in the pipeline is smaller than a preset value), the relay coil is electrified, the control unit controls the first electric valve to close the first pipeline, and controls the second electric valve to open the second pipeline so as to switch from the first pipeline to the second pipeline. In this scenario, the indicator light of the first duct is illuminated red, and the indicator light of the second duct is illuminated green. On the contrary, when the pressure signal output by the pressure detection meter lasts for 60s and is a low level signal (namely the pressure of the medium in the pipeline is greater than or equal to the preset value), the relay coil is de-energized, the control unit controls the first electric valve to open the first pipeline, and controls the second electric valve to close the second pipeline so as to switch from the second pipeline to the first pipeline. In this scenario, the indicator light of the first duct is lit green, and the indicator light of the second duct is lit red.
Based on the above description, the embodiment of the utility model realizes automatic control of pipeline switching by controlling pipeline switching according to the pressure signal. Furthermore, the embodiment of the utility model prevents medium backflow by arranging the check valve and performs time delay judgment by the relay so as to avoid errors caused by medium fluctuation in the pipeline, and the control circuit can be protected by controlling the opening or closing of the electric valve in a time delay manner so as to ensure the safety and reliability of pipeline switching. In addition, the embodiment of the utility model is also provided with an indicator light so as to display the switching state of the pipeline.
FIG. 6 illustrates an exemplary circuit schematic of an apparatus for pipe switching according to an embodiment of the present invention. The overall control switch QF1 is shown at the far left in fig. 6 to control the entire control circuit, which is normally in a normally closed state. Further, a first electric valve and a second electric valve are connected to the electric circuit, the first electric valve and the second electric valve are connected to the connection points KM1 and KM2, and the first electric valve and the second electric valve are opened or closed when the KM1 and the KM2 are connected or disconnected. The switching of the pipes can then be achieved by means of manual and automatic connection points in the circuit. Taking the purified water pipeline and the ultrafiltration water pipeline as an example, in one embodiment, when the switch is toggled to the manual connection point, the purified water pipeline and the ultrafiltration water pipeline can be switched manually. In the scene of manually switching pipelines, the pressure detection meter, the relay and other equipment are not needed.
In another embodiment, when the switch is toggled to the automatic connection point, the pressure of the water flow in the purified water pipeline is first detected by a pressure detection gauge (e.g. an electro-contact pressure gauge) and a corresponding pressure signal is output. Then, the delay time judgment can be carried out through a relay. When the pressure of the water flow in the purified water pipeline is continuously lower than the preset value of the pressure detection meter (namely the pressure signal is a high-level signal) in 60s for example, a connection point K in the circuit is conducted, so that a relay KT1 in the circuit is electrified, a contactor KA1 connected with KM1 in the circuit is electrified, and a contactor KA1 connected with KM2 is electrified. Further, KM1 connected to the second electric valve was turned on, and KM2 connected to the first electric valve was turned off, to switch from the purified water pipe to the ultra-filtered water pipe. On the contrary, when the pressure of the water flow in the purified water pipeline is continuously greater than or equal to the preset value of the pressure detection meter (namely the pressure signal is a low-level signal) in 60s for example, the connection point K in the circuit is disconnected, so that the relay KT2 in the circuit is de-energized, and therefore the contactor KA1 connected with the KM1 in the circuit is de-energized, and the contactor KA1 connected with the KM2 is energized. Then, KM1 connected to the second electric valve was disconnected, and KM2 connected to the first electric valve was conducted to switch from the ultrafiltration water pipe to the purified water pipe.
It is further shown that indicator lights, such as a red HR1 and a red HR2, and a green HG1 and a green HG2 are connected in the circuit. In one implementation scenario, when KM1 is switched on, i.e. switched from the purified water pipeline to the ultrafiltration water pipeline, the red light HR1 of the purified water pipeline is lit and the green light HG2 on the ultrafiltration water pipeline is lit. In contrast, when KM2 was switched on, i.e. when switching from the ultrafiltration water line to the purified water line, the green light HG1 on the purified water line was lit and the red light HR2 on the ultrafiltration water line was lit, so that the staff could check the line switching status.
It should be understood that the terms "first", "second", "third" and "fourth", etc. in the claims, the description and the drawings of the present invention are used for distinguishing different objects and are not used for describing a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification and claims of this application, the singular form of "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this specification refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.
As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
Although the embodiments of the present invention are described above, the descriptions are only examples for facilitating understanding of the present invention, and are not intended to limit the scope and application scenarios of the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (10)
1. An apparatus for pipe switching, comprising:
a pressure sensing gauge disposed on the pipe and configured to,
detecting the pressure of a medium in the pipeline; and
outputting a corresponding pressure signal based on the pressure of the medium in the pipeline and a preset value thereof;
an electric valve for being disposed on the duct and opening or closing the duct according to a control; and the control unit is used for being connected with the pressure detection meter and the electric valve and controlling the electric valve to open or close a pipeline according to the pressure signal so as to switch the pipeline.
2. The device of claim 1, wherein the conduit comprises a first conduit and a second conduit, the electrically operated valve comprises a first electrically operated valve and a second electrically operated valve, and:
the pressure detection meter is used for being arranged on the first pipeline and detecting a pressure signal corresponding to the pressure of the medium in the first pipeline reaching a preset value;
the first electric valve is used for being arranged on the first pipeline and opening or closing the first pipeline according to control; and
the second electric valve is arranged at the joint of the first pipeline and the second pipeline and is used for opening or closing the second pipeline according to control.
3. The apparatus of claim 2, wherein in controlling the electric valve to open or close a pipe according to the pressure signal for pipe switching, the control unit is further configured to:
the pressure signal controls the first electric valve or the second electric valve to open or close the first pipeline or the second pipeline so as to switch the first pipeline and the second pipeline.
4. The apparatus of claim 3, wherein the pressure signal is a high level signal or a low level signal, and the control unit is further configured to, in the switching of the first pipeline and the second pipeline, control the first electrically operated valve or the second electrically operated valve to open or close the first pipeline or the second pipeline according to the pressure signal:
in response to the pressure signal being a high level signal, controlling the first electrically operated valve to open the first conduit and controlling the second electrically operated valve to close a second conduit to switch from the second conduit to the first conduit; or
In response to the pressure signal being a low level signal, controlling the first electrically operated valve to close the first conduit and controlling the second electrically operated valve to open a second conduit to switch from the first conduit to the second conduit.
5. The apparatus of claim 1, wherein the pressure sensing gauge comprises an electro-contact pressure gauge.
6. The apparatus of claim 2, further comprising a check valve for preventing backflow of media within the conduit.
7. The apparatus of claim 6, wherein the check valve comprises a first check valve and a second check valve, and wherein:
the first check valve is used for being arranged on the first pipeline and preventing the medium in the first pipeline from flowing back; and
the second check valve is for being disposed on a junction of the first pipe and the second pipe and preventing a medium within the second pipe from flowing backward.
8. The apparatus of claim 2, further comprising an indicator light for displaying a switching state of the first and second conduits.
9. The apparatus of claim 2, further comprising a relay for performing the time delay determination.
10. The apparatus of claim 9, wherein the relay is connected to the control unit, and the control unit is further configured to:
and controlling the first electric valve or the second electric valve to delay according to the delay judgment result of the relay so as to open or close the first pipeline or the second pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692929.3U CN216383623U (en) | 2021-11-04 | 2021-11-04 | Device for switching pipelines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122692929.3U CN216383623U (en) | 2021-11-04 | 2021-11-04 | Device for switching pipelines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216383623U true CN216383623U (en) | 2022-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122692929.3U Active CN216383623U (en) | 2021-11-04 | 2021-11-04 | Device for switching pipelines |
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| CN (1) | CN216383623U (en) |
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- 2021-11-04 CN CN202122692929.3U patent/CN216383623U/en active Active
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