CN114110433A - Safety maintenance device and method - Google Patents
Safety maintenance device and method Download PDFInfo
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- CN114110433A CN114110433A CN202111446253.8A CN202111446253A CN114110433A CN 114110433 A CN114110433 A CN 114110433A CN 202111446253 A CN202111446253 A CN 202111446253A CN 114110433 A CN114110433 A CN 114110433A
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- valve body
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- 238000012423 maintenance Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000012530 fluid Substances 0.000 claims abstract description 82
- 238000001514 detection method Methods 0.000 claims description 17
- 239000007788 liquid Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 9
- 238000012790 confirmation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000002253 acid Substances 0.000 description 5
- 239000003513 alkali Substances 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 235000013365 dairy product Nutrition 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Pipeline Systems (AREA)
Abstract
The invention relates to the technical field of fluid production, in particular to a safety maintenance device and a method, wherein the safety maintenance device comprises a first pipeline and a second pipeline, the first pipeline is used for connecting a fluid incoming line and equipment to be maintained, and a first valve body and a second valve body are sequentially arranged on the first pipeline along the flow direction of fluid in the first pipeline; one end of the second pipeline is communicated with the first pipeline between the first valve body and the second valve body, the other end of the second pipeline is used for being connected with a discharge device, and the second pipeline is provided with a third valve body. When equipment maintenance is carried out, maintenance personnel can be ensured to truly verify whether fluid exists in the pipeline or not in a safe environment, whether equipment maintenance can be carried out or not is determined by truly judging whether the maintenance environment is safe, the effect of personal safety risks before and during maintenance is avoided, and an effective safety protection effect is played.
Description
Technical Field
The invention relates to the technical field of fluid production, in particular to a safety maintenance device and a safety maintenance method.
Background
In the production process of fluids such as dairy products and the like, pipelines are generally used for conveying fluid products, and in an automatic fluid production system, when manual maintenance and repair are needed, such as valve repair and pump body repair, the pipelines are manually cut off, if fluid in the pipelines is used up, the fluid flows out, and dangerous fluids have safety risks, such as acid, alkali, steam, hot water, ice water and the like.
At present, a fluid pipeline is not provided with a maintenance device, if the fluid pipeline is provided with a manual valve for stopping, the fluid pipeline is usually provided with the manual valve for stopping, the fluid pipeline is always opened in the normal production process at ordinary times, personnel close the valve when needing maintenance, if the fluid pipeline is not provided with the manual valve in the use process, fluid in the pipeline is usually drained through a maintenance port when equipment is maintained, serious safety risks exist, if the fluid pipeline is provided with the manual valve, when the equipment is maintained, because the manual valve does not act for a long time in the production process, the sealing is easy to age, the valve is usually closed untight when being closed, the extremely large leakage possibility exists, and when the leakage happens, the serious safety risks exist.
In concentrated acid and concentrated alkali station delivery pumps in a dairy production system, a manual valve is installed or not installed in front of the delivery pump, personnel close the manual valve or directly maintain according to experience during maintenance, if concentrated acid and concentrated alkali exist in a pipeline during maintenance, serious personal safety is easily caused, the system state cannot be locked, and when other personnel perform misoperation, serious safety risks exist.
Disclosure of Invention
The invention provides a safety maintenance device and a safety maintenance method, which are used for solving the defects that when equipment is maintained in the prior art, fluid in a pipeline is usually drained through a maintenance port, and the leakage possibility and serious safety risk are extremely high.
The invention provides a safety maintenance device, which comprises a first pipeline and a second pipeline, wherein the first pipeline is used for connecting a fluid incoming line and equipment to be maintained; one end of the second pipeline is communicated with the first pipeline between the first valve body and the second valve body, the other end of the second pipeline is used for being connected with a discharge device, and a third valve body is arranged on the second pipeline.
According to the safety maintenance device provided by the invention, the safety maintenance device further comprises a pressure detection piece, and the pressure detection piece is arranged on the first pipeline between the first valve body and the second valve body.
According to the safety maintenance device provided by the invention, the safety maintenance device further comprises a lock for locking one or more of the first valve body, the second valve body and the third valve body.
According to the safety maintenance device provided by the invention, position monitoring switches are arranged on the first valve body, the second valve body and the third valve body.
The safety maintenance device provided by the invention further comprises a controller, and the controller is connected with the position monitoring switch.
According to the safety maintenance device provided by the invention, the first pipeline is communicated with the second pipeline through the three-way valve.
According to the safety maintenance device provided by the invention, the first valve body, the second valve body and the third valve body are butterfly valves or ball valves.
The invention also provides a safety maintenance method, which applies the safety maintenance device and comprises the following steps:
confirming the equipment to be maintained:
closing the first valve body, and opening the second valve body and the third valve body;
determining that no liquid flows out of the second pipeline;
confirmation of fluid coming line:
opening the first valve body and the third valve body, and closing the second valve body;
determining that no liquid flows out of the second pipeline;
and (4) performing maintenance work:
and closing the first valve body, the second valve body and the third valve body, and maintaining the equipment to be maintained.
According to the safety maintenance method provided by the invention, before the step of confirming the equipment to be maintained, the method further comprises the following steps:
confirming the safety maintenance device:
closing the first valve body and the second valve body, and opening the third valve body;
it is determined that no liquid is flowing out of the second conduit.
According to the safety maintenance method provided by the invention, before the step of closing the first valve body and the second valve body and opening the third valve body, the method further comprises the following steps:
closing the first valve body, the second valve body and the third valve body;
it is determined that the detection value of the pressure detection member is 0.
According to the safety maintenance device provided by the invention, the first pipeline is communicated with the fluid incoming line and the equipment to be maintained, namely, the fluid flows out from the fluid incoming line and flows into the equipment to be maintained through the first pipeline, the first pipeline is sequentially provided with the first valve body and the second valve body along the flow direction of the fluid, the first pipeline between the first valve body and the second valve body is communicated with the second pipeline, the tail end of the second pipeline is provided with the discharge equipment, namely, the fluid in the first pipeline can flow to the discharge equipment from the second pipeline, and the second pipeline is provided with the third valve body. By controlling the opening and closing of the first valve body, the second valve body, and the third valve body, it is possible to detect whether or not the first pipe has a fluid therein. That is, the first valve body and the third valve body are opened, the second valve body is closed, and the fluid in the first pipe between the fluid incoming line and the second pipe can be discharged, and the second valve body and the third valve body are opened, and the first valve body is closed, and the fluid in the first pipe between the second pipe and the equipment to be maintained can be discharged.
Before the equipment that needs the maintenance, through the valve body switch, make the fluid in the first pipeline flow to discharge apparatus to make follow-up maintenance process can realize high-efficient maintenance under the prerequisite of guarantee personal safety. When the device is maintained, the invention can ensure that maintenance personnel can really verify whether the fluid exists in the pipeline or not in a safe environment, and can determine whether the device can be maintained or not by really judging whether the maintenance environment is safe or not, thereby avoiding personal safety risks before and during maintenance and playing an effective safety protection role.
In addition to the technical problems addressed by the present invention, the technical features constituting the technical solutions and the advantages brought by the technical features of the technical solutions described above, other technical features of the present invention and the advantages brought by the technical features of the present invention will be further described with reference to the accompanying drawings or will be understood by the practice of the present invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a safety maintenance device provided by the present invention;
reference numerals:
100. a first pipeline; 110. a first valve body; 120. a second valve body;
200. a second pipeline; 210. a third valve body;
300. a fluid incoming line; 400. equipment to be maintained; 500. a discharge device; 600. a pressure detecting member.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Further, in the description of the embodiments of the present invention, unless otherwise specified, "a plurality", and "a plurality" mean two or more, and "a plurality", "several", and "several groups" mean one or more.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1, the safety maintenance device according to the embodiment of the present invention includes a first pipeline 100 and a second pipeline 200, the first pipeline 100 is used for connecting a fluid incoming line 300 and a device 400 to be maintained, and a first valve body 110 and a second valve body 120 are sequentially disposed on the first pipeline 100 along a flow direction of a fluid in the first pipeline 100; one end of the second pipeline 200 is communicated with the first pipeline 100 between the first valve body 110 and the second valve body 120, and the other end is used for connecting with the discharge device 500, and the third valve body 210 is provided on the second pipeline 200.
According to the safety maintenance device of the embodiment of the invention, the first pipeline 100 is communicated with the fluid incoming line 300 and the equipment 400 to be maintained, namely, the fluid flows out from the fluid incoming line 300 and flows into the equipment 400 to be maintained through the first pipeline 100, the first valve body 110 and the second valve body 120 are sequentially arranged on the first pipeline 100 along the flow direction of the fluid, the second pipeline 200 is communicated on the first pipeline 100 between the first valve body 110 and the second valve body 120, the discharge equipment 500 is arranged at the tail end of the second pipeline 200, namely, the fluid in the first pipeline 100 can flow to the discharge equipment 500 from the second pipeline 200, and the third valve body 210 is arranged on the second pipeline 200. By the on-off control of the first valve body 110, the second valve body 120, and the third valve body 210, it is possible to detect whether there is fluid in the first pipe. That is, the first valve body 110 and the third valve body 210 are opened, the second valve body 120 is closed, the fluid in the first pipe between the incoming line 300 and the second pipe can be discharged, and the second valve body 120 and the third valve body 210 are opened, the first valve body 110 is closed, the fluid in the first pipe between the second pipe and the device to be serviced 400 can be discharged.
Before the equipment that needs to be maintained, through the valve body switch, make the fluid in the first pipeline flow out to exhaust apparatus 500 to make follow-up maintenance process can realize high-efficient maintenance under the prerequisite of guarantee personal safety. When the device is maintained, the invention can ensure that maintenance personnel can really verify whether the fluid exists in the pipeline or not in a safe environment, and can determine whether the device can be maintained or not by really judging whether the maintenance environment is safe or not, thereby avoiding personal safety risks before and during maintenance and playing an effective safety protection role.
In this embodiment, the drain 500 may be a floor drain.
According to an embodiment of the present invention, the safety maintenance apparatus of the embodiment of the present invention further includes a pressure detection member 600, and the pressure detection member 600 is disposed on the first pipeline 100 between the first valve body 110 and the second valve body 120. In this embodiment, the pressure detecting member 600 is used to detect the pressure of the fluid in the first pipeline 100. After the first valve body 110, the second valve body 120 and the third valve body 210 are all closed, whether the detected value of the pressure detecting element 600 changes or not can be reflected, and therefore the problem of whether the first valve body 110, the second valve body 120 and the third valve body 210 leak or not can be reflected, and the normal operation of the safety maintenance device can be guaranteed.
In this embodiment, the pressure detecting member 600 may be a pressure sensor or a pressure gauge.
According to an embodiment of the present invention, the safety maintenance apparatus of the embodiment of the present invention further includes a lock for locking one or more of the first valve body 110, the second valve body 120, and the third valve body 210. In this embodiment, the first valve body 110, the second valve body 120, and the third valve body 210 are all provided with lock holes, and are configured with corresponding locks. When equipment is maintained, the opening and closing states of the first valve body 110, the second valve body 120 and the third valve body 210 are determined, the first valve body, the second valve body and the third valve body are locked through the lockset, and the locking object of the valve bodies can be adjusted and selected according to actual needs so as to prevent misoperation of other workers and ensure safety in the maintenance process.
In this embodiment, the first valve body 110, the second valve body 120, and the third valve body 210 are selected from the same LOTO locking hole and are configured with locks, and in other embodiments, the first valve body 110, the second valve body 120, and the third valve body 210 may also be selected from different locking holes and locks, so that the first valve body 110, the second valve body 120, and the third valve body 210 can be locked in the maintenance process, and can be unlocked immediately after the maintenance is completed.
According to an embodiment of the present invention, the first valve body 110, the second valve body 120 and the third valve body 210 are provided with position monitoring switches. In this embodiment, the first valve body 110, the second valve body 120, and the third valve body 210 are all installed with automatic position monitoring switches, that is, proximity switches, and the valve state and program control are monitored by an automatic means, and when there is pressure abnormality and valve body position abnormality, the system alarms and stops, thereby further improving the safety level.
According to an embodiment of the present invention, the safety maintenance device of the embodiment of the present invention further includes a controller, and the controller is connected to the position monitoring switch. In this embodiment, the automatic position monitoring switches installed on the first valve body 110, the second valve body 120, and the third valve body 210 are all connected to the controller, the controller can receive signals of the position monitoring switches in real time, determine the position state of each valve body, set a corresponding program in the controller, process the signals, make a determination on the signals and feed the signals back to the system, and when there is pressure abnormality, the position of a certain valve body is abnormal, the system alarms and stops, thereby further improving the safety level.
According to one embodiment of the present invention, the first line 100 is in communication with the second line 200 via a three-way valve. In this embodiment, the first pipeline 100 is communicated with the second pipeline 200 through a three-way valve, which ensures the communication between the first pipeline and the second pipeline, and the first pipeline 100 is unblocked when the normal fluid flows between the fluid incoming line 300 and the device 400 to be maintained in the non-maintenance working state.
According to one embodiment of the present invention, the first valve body 110, the second valve body 120, and the third valve body 210 are butterfly valves or ball valves. In this embodiment, the first valve body 110, the second valve body 120, and the third valve body 210 can be selected according to the actual fluid conditions, such as sanitary pipelines, manual butterfly valves can be adopted, and the valves are convenient to clean, such as water and steam pipelines, and manual ball valves can be adopted, so as to facilitate sealing.
The embodiment of the invention also provides a safety maintenance method, which is applied to the safety maintenance device and comprises the following steps:
s100, confirming the device to be maintained 400:
s101, closing the first valve body 110, and opening the second valve body 120 and the third valve body 210;
s102, determining that no liquid flows out of the second pipeline 200;
s200, confirming the fluid incoming line 300:
s201, opening the first valve body 110 and the third valve body 210, and closing the second valve body 120;
s202, determining that no liquid flows out of the second pipeline 200;
s300, performing maintenance work:
s301, the first valve body 110, the second valve body 120, and the third valve body 210 are closed, and the maintenance work is performed on the apparatus to be maintained 400.
In the safety maintenance method according to the embodiment of the present invention, in the step of confirming whether the device 400 to be maintained has the fluid, the first valve body 110 on the first pipeline is closed, the second valve body 120 on the first pipeline and the third valve body 210 on the second pipeline are opened, that is, the device 400 to be maintained is communicated with the exhaust device 500, whether the fluid exists in the device 400 to be maintained is judged, if the fluid exists in the device 400 to be maintained and the first pipeline section near the side of the device 400 to be maintained, the fluid flows out to the exhaust device 500 from the second pipeline, and if no fluid exists or the fluid is completely discharged, the next step of confirming whether the fluid exists in the fluid line 300 can be performed.
In the step of confirming whether the fluid line 300 has the fluid, the second valve body 120 on the first pipeline is closed, the first valve body 110 on the first pipeline and the third valve body 210 on the second pipeline are opened, namely, the fluid line 300 is communicated with the exhaust device 500, whether the fluid line 300 has the fluid is judged, if the fluid line 300 and the first pipeline section close to one side of the fluid line 300 have the fluid, the fluid flows out to the exhaust device 500 from the second pipeline, and if no fluid or the fluid is completely discharged, the next step of performing the maintenance work can be performed.
In the step of performing the maintenance work, the second valve body 120 on the first pipeline is closed, the first valve body 110 on the first pipeline and the third valve body 210 on the second pipeline isolate the incoming fluid line 300, the device 400 to be maintained and the drain device 500 from each other. After two steps of confirming the equipment 400 to be maintained and confirming the fluid incoming line 300, the fluids in the equipment 400 to be maintained, the fluid incoming line 300, the first pipeline and the second pipeline are all discharged, at the moment, the safe maintenance environment is confirmed, personnel can carry out equipment maintenance, meanwhile, the fluids in the pipelines are all discharged completely through the discharge equipment, the fluid pollution to the ground of the maintenance position is avoided, and the maintenance efficiency is improved.
According to an embodiment of the present invention, S100, before the step of confirming the device 400 to be maintained, further includes:
s400, confirming the safety maintenance device:
s401, closing the first valve body 110 and the second valve body 120, and opening the third valve body 210;
s402, it is determined that no liquid flows out of the second pipe 200.
In this embodiment, before the step of determining whether the device 400 to be maintained contains fluid, it is determined whether the safety maintenance device is valid. In the step of confirming whether the safety maintenance device is effective, the first valve body 110 and the second valve body 120 on the first pipeline are closed, the third valve body 210 on the second pipeline is opened, namely, the pipe section between the first valve body 110 and the second valve body 120 on the first pipeline is communicated with the discharge device 500, whether fluid exists in the part of the pipe section is judged, if the fluid flows out, the sealing of the safety maintenance device is proved to be slightly leaked, at the moment, the maintenance condition is not met, the system inspection operation is needed, the next step of confirming the operation of the device 400 to be maintained can be carried out after the valve body is replaced, if the fluid does not flow out, the sealing of the safety maintenance device is proved to be completely effective, and the next step of confirming the operation of the device 400 to be maintained can be carried out.
According to an embodiment of the present invention, S401, before the step of closing the first valve body 110 and the second valve body 120 and opening the third valve body 210, the method further includes:
s403, closing the first valve body 110, the second valve body 120, and the third valve body 210;
s404, the detection value of the pressure detection member 600 is determined to be 0.
In this embodiment, in the step of confirming whether the safety maintenance device is valid, the first valve body 110 and the second valve body 120 on the first pipeline and the third valve body 210 on the second pipeline may be closed first, the detection value of the pressure detection member 600 mounted on the first pipeline section between the first valve body 110 and the second valve body 120 may be determined, if the detection value is "0", it is verified that the safety maintenance device is safe and valid, there is no significant leakage from the first valve body 110, the second valve body 120, and the third valve body 210 may be closed, and at this time, the steps of closing the first valve body 110 and the second valve body 120 and opening the third valve body 210 may be performed, if the detection value is not "0", it is verified that the safety maintenance device is damaged, at this time, no maintenance condition is provided, and a system inspection operation is required, and, if the detection value is "0", the steps of closing the first valve body 110 and the second valve body 120 and opening the third valve body 210 may be performed.
In one embodiment, the safety maintenance device of the invention can be installed in front of a delivery pump of a concentrated acid and concentrated alkali station in a dairy production system, when the delivery pump needs manual maintenance, a maintenance worker uses the safety maintenance device before maintenance, the safety maintenance method of the invention is operated step by step, the maintenance position is confirmed to be absolutely safe, the safety maintenance device is locked before maintenance, meanwhile, an automatic control system recognizes that the system is in a maintenance state at present through a proximity switch position of a manual valve, the automatic control system automatically locks the delivery pump and the concentrated acid and concentrated alkali system, the current system cannot carry out any operation, and the automatic control system can be operated after being reset after the maintenance is finished and the proximity switch position is correct.
When in use, the valve body is not limited to be a stop valve, an electric valve, an electromagnetic valve or other valves which can be opened and closed.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A safety maintenance device, characterized by: the device comprises a first pipeline and a second pipeline, wherein the first pipeline is used for connecting a fluid incoming line and equipment to be maintained, and a first valve body and a second valve body are sequentially arranged on the first pipeline along the flow direction of the fluid in the first pipeline; one end of the second pipeline is communicated with the first pipeline between the first valve body and the second valve body, the other end of the second pipeline is used for being connected with a discharge device, and a third valve body is arranged on the second pipeline.
2. The safety maintenance device of claim 1, wherein: still include pressure detection spare, pressure detection spare sets up in first valve body with on the second valve body the first pipeline.
3. The safety maintenance device of claim 1, wherein: the valve further comprises a lock, wherein the lock is used for locking one or more of the first valve body, the second valve body and the third valve body.
4. The safety maintenance device of claim 1, wherein: and position monitoring switches are arranged on the first valve body, the second valve body and the third valve body.
5. The safety maintenance device of claim 4, wherein: the device further comprises a controller, and the controller is connected with the position monitoring switch.
6. The safety maintenance device according to any one of claims 1 to 5, characterized in that: the first pipeline is communicated with the second pipeline through a three-way valve.
7. The safety maintenance device of claim 6, wherein: the first valve body, the second valve body and the third valve body are butterfly valves or ball valves.
8. A method of security maintenance, characterized by: the safety maintenance device according to any one of claims 1 to 7, comprising:
confirming the equipment to be maintained:
closing the first valve body, and opening the second valve body and the third valve body;
determining that no liquid flows out of the second pipeline;
confirmation of fluid coming line:
opening the first valve body and the third valve body, and closing the second valve body;
determining that no liquid flows out of the second pipeline;
and (4) performing maintenance work:
and closing the first valve body, the second valve body and the third valve body, and maintaining the equipment to be maintained.
9. The security maintenance method according to claim 8, characterized in that: the step of confirming the equipment to be maintained further comprises the following steps:
confirming the safety maintenance device:
closing the first valve body and the second valve body, and opening the third valve body;
it is determined that no liquid is flowing out of the second conduit.
10. The security maintenance method according to claim 9, characterized in that: close first valve body and second valve body, still include before the step of opening the third valve body:
closing the first valve body, the second valve body and the third valve body;
it is determined that the detection value of the pressure detection member is 0.
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| CN202111446253.8A CN114110433B (en) | 2021-11-30 | 2021-11-30 | Safety maintenance device and method |
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| CN202111446253.8A CN114110433B (en) | 2021-11-30 | 2021-11-30 | Safety maintenance device and method |
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