CN113991585A - Power transmission cable duct arrangement system and alarm method thereof - Google Patents
Power transmission cable duct arrangement system and alarm method thereof Download PDFInfo
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- CN113991585A CN113991585A CN202111334956.1A CN202111334956A CN113991585A CN 113991585 A CN113991585 A CN 113991585A CN 202111334956 A CN202111334956 A CN 202111334956A CN 113991585 A CN113991585 A CN 113991585A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G9/00—Installations of electric cables or lines in or on the ground or water
- H02G9/06—Installations of electric cables or lines in or on the ground or water in underground tubes or conduits; Tubes or conduits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
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Abstract
The invention discloses a power transmission cable pipe arrangement system and an alarm method thereof, relates to the technical field of power cable power transmission, and mainly aims to timely find the sand hole water leakage phenomenon of the pipe wall of a cooling water pipe in a pipe arrangement and avoid the potential safety hazard of electric power. The main technical scheme of the invention is as follows: transmission cable racking system comprising: the prefabricated block is embedded in the soil body, a calandria is arranged in the prefabricated block, and a cable penetrates through the calandria; the outer ring pipe is sleeved on the shaft side of the cooling water pipe, and the outer ring pipe and the cooling water pipe form an annular closed space; the water collecting tank is located the below of outer ring pipe, and the water collecting tank is connected in annular airtight space, and the one end of blast pipe is connected in the upper end of water collecting tank, and the other end extends to above the earth's surface, and electrolysis mechanism is including the positive electrode, electrolysis main body equipment and the negative electrode that connect gradually, and positive electrode and negative electrode are installed respectively in the relative lateral wall of water collecting tank, and the hydrogen detector is installed to the other end inboard of blast pipe.
Description
Technical Field
The invention relates to the technical field of power cable transmission, in particular to a transmission cable pipe arrangement system and an alarm method thereof.
Background
The underground power cable is a key component in a modern power supply system, has the outstanding advantages of small occupied area, reliable power transmission, strong anti-interference capability and the like in power transmission occasions such as cities or crossing expressways, culverts and the like, and is hardly influenced by environmental factors such as meteorological conditions and the like compared with overhead conductors. However, the inventor finds that the current-carrying capacity of the high-voltage cable is greatly influenced by the cable laying mode, and when the high-voltage cable adopts the calandria laying mode, the temperature of the cable is obviously increased when a large current is introduced into the cable or the load is suddenly increased due to resistance loss, eddy current loss, thermal resistance of the calandria and the like, so that safety accidents are easily caused. In order to ensure the stable operation of a power transmission system, only the current-carrying capacity can be controlled, so that the power transmission capacity is severely restricted.
In order to solve the problems, the cooling water pipe and the cable are laid synchronously in the exhaust pipe in the prior art, so that the transmission cable is cooled. However, if the pipe wall of the cooling water pipe runs for a long time and sand holes or leakage points occur on the pipe wall of the cooling water pipe, water in the cooling water pipe can be sprayed into the pipe and soak the cable, and the potential safety hazard of electric power is inevitable.
Disclosure of Invention
In view of the above, the invention provides a power transmission cable pipe arrangement system and an alarm method thereof, and mainly aims to find sand holes and water leakage phenomena of pipe walls of cooling water pipes in a pipe arrangement in time and avoid potential safety hazards of electric power.
In order to achieve the purpose, the invention mainly provides the following technical scheme:
in one aspect, the present invention provides a power transmission cable duct bank system, comprising: the system comprises a precast block, a cooling water part and an early warning part;
the prefabricated block is buried in the soil body, a calandria is arranged in the prefabricated block, and a cable penetrates through the calandria;
the cooling water part comprises a cooling water pipe and an outer ring pipe which are arranged in the row pipe, the outer ring pipe is sleeved on the shaft side of the cooling water pipe, and the outer ring pipe and the cooling water pipe form an annular closed space;
the early warning part comprises a water collecting tank, an exhaust pipe and an electrolysis mechanism, the water collecting tank is located below the outer ring pipe, the water collecting tank is connected to the annular closed space, one end of the exhaust pipe is connected to the upper end of the water collecting tank, the other end of the exhaust pipe extends to the ground surface, the electrolysis mechanism comprises a positive electrode, an electrolysis main device and a negative electrode which are connected in sequence, the positive electrode and the negative electrode are respectively installed on opposite side walls of the water collecting tank, and a hydrogen detector is installed on the inner side of the other end of the exhaust pipe.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
Optionally, the exhaust pipe further comprises a rain-proof cap, and the rain-proof cap is arranged at the other end of the exhaust pipe and used for preventing rainwater from entering the exhaust pipe.
Optionally, the electrolysis mechanism further comprises a relay, the positive electrode and the electrolysis main body equipment are connected through a coil of the relay, and a normally open contact of the relay is electrically connected to the alarm.
Optionally, the pipe bundle type electrolytic cell further comprises a plurality of inspection wells, the number of the cooling water pipes is multiple, the number of the outer ring pipes is multiple, each outer ring pipe is sleeved on one of the cooling water pipes, the plurality of cooling water pipes are sequentially connected, the plurality of inspection wells are sequentially arranged along the extension direction of the pipe bundle, each cooling water pipe is arranged between two adjacent inspection wells, one water collecting tank, one exhaust pipe and one electrolysis mechanism are correspondingly installed in each inspection well, and the water collecting tank is connected to the end of the annular closed space.
Optionally, the cooling water pipes are PPR pipes, the outer ring pipe is a PE pipe, and two adjacent cooling water pipes are connected by a hot-melt butt welding method.
Optionally, the inspection well further comprises a base, the base is poured at the bottom of the inspection well, and the water collecting tank is installed on the base.
Optionally, the precast block includes a first precast block and a second precast block which are integrally cast, the second precast block is located below the first precast block, and the width of the second precast block is greater than that of the first precast block.
Optionally, the annular closed space is provided with a stainless steel braided hose, one end of the stainless steel braided hose is in threaded connection with the top wall of the water collecting tank, and the other end of the stainless steel braided hose is in threaded connection with the end part of the annular closed space.
On the other hand, the invention also provides an alarm method of the transmission cable duct bank system, which comprises the following steps:
(1) when sand holes leak on the pipe wall of the cooling water pipe, water in the cooling water pipe enters the annular closed space due to the self pressure, and then enters the water collecting tank;
(2) when the water level in the water collecting tank rises to the height of the positive electrode and the negative electrode, the electrolysis main body equipment starts to operate, and the water in the water collecting tank performs an electrolysis reaction to generate hydrogen and oxygen;
(3) the hydrogen detector gives an alarm when the concentration of hydrogen discharged from the exhaust pipe rises.
By the technical scheme, the invention at least has the following advantages:
the spontaneous alarm process of the system is as follows:
(1) when sand holes leak on the pipe wall of the cooling water pipe, water in the cooling water pipe enters the annular closed space due to the self pressure, and then enters the water collecting tank;
(2) when the water level in the water collecting tank rises to the height of the positive electrode and the negative electrode, the electrolysis main body equipment starts to operate, and the water in the water collecting tank performs an electrolysis reaction to generate hydrogen and oxygen;
(3) the hydrogen detector gives an alarm when the concentration of hydrogen discharged from the exhaust pipe rises.
At above-mentioned spontaneous alarm process of system and any moment before it, the cooling water all does not contact the cable, avoids the cable to be soaked by the water logging, and during the hydrogen detector reported to the police, the staff goes to handle the condenser tube who changes the leaking before the very first time, avoids condenser tube's pipe wall sand eye to continuously leak to can avoid electric power potential safety hazard.
Drawings
Fig. 1 is a front view of an electrical transmission cable racking system according to an embodiment of the present invention;
fig. 2 is a side sectional view of an electrical transmission cable racking system according to an embodiment of the present invention;
FIG. 3 is a schematic view of the structure of the electrolysis mechanism.
Reference numerals in the drawings of the specification include: the device comprises a precast block 1, a calandria 2, a cable 3, a cooling water pipe 4, an outer ring pipe 5, a water collecting tank 6, an exhaust pipe 7, a positive electrode 8, a negative electrode 9, electrolysis main equipment 10, a hydrogen detector 11, a rain-proof cap 12, a relay 13, a coil 14, a normally open contact 15, an alarm 16, an inspection well 17, a base 18, a first precast block 101, a second precast block 102 and a stainless steel braided hose 19.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, in one aspect, an embodiment of the present invention provides an electrical transmission cable duct system, which includes: the device comprises a precast block 1, a cooling water part and an early warning part;
the prefabricated block 1 is buried in soil, a calandria 2 is installed in the prefabricated block 1, and a cable 3 penetrates through the calandria 2;
the cooling water part comprises a cooling water pipe 4 and an outer ring pipe 5 which are arranged in the calandria 2, the outer ring pipe 5 is sleeved on the shaft side of the cooling water pipe 4, and the outer ring pipe 5 and the cooling water pipe 4 form an annular closed space;
the early warning part comprises a water collecting tank 6, an exhaust pipe 7 and an electrolysis mechanism, wherein the water collecting tank 6 is positioned below the outer ring pipe 5, the water collecting tank 6 is connected to the annular closed space, one end of the exhaust pipe 7 is connected to the upper end of the water collecting tank 6, the other end of the exhaust pipe extends to the ground surface, the electrolysis mechanism comprises a positive electrode 8, an electrolysis main device 10 and a negative electrode 9 which are sequentially connected, the positive electrode 8 and the negative electrode 9 are respectively arranged on opposite side walls of the water collecting tank 6, and a hydrogen detector 11 is arranged on the inner side of the other end of the exhaust pipe 7.
The working process of the transmission cable duct bank system is as follows:
(1) when sand holes leak on the pipe wall of the cooling water pipe 4, water in the cooling water pipe 4 enters the annular closed space due to the self pressure, and then enters the water collecting tank 6;
(2) when the water level in the water collecting tank 6 rises to the height of the positive electrode 8 and the negative electrode 9, the electrolysis main body device 10 starts to operate, and the water in the water collecting tank 6 undergoes an electrolysis reaction to generate hydrogen and oxygen;
(3) the hydrogen detector 11 gives an alarm in association with the increase in the concentration of hydrogen discharged from the exhaust pipe 7.
At the spontaneous alarm in-process of above-mentioned system and any moment before it, the cooling water all does not contact cable 3, avoids cable 3 to be soaked by the water logging, and when hydrogen detector 11 reported to the police, staff went to handle the cooling water pipe 4 of changing leaking before the very first time, avoided the pipe wall sand eye of cooling water pipe 4 to continuously leak to can avoid electric power potential safety hazard.
In the technical scheme of the invention, by using the system, the cold energy released by the cooling water can cool the environment in the calandria 2, and meanwhile, the cable 3 can be prevented from being soaked by water, so that the potential safety hazard of electric power is avoided.
Specifically, precast block 1 adopts concrete placement, and after precast block 1 buried underground in the soil body, precast block 1 atress was even, prolongs its life.
Specifically, the water collecting tank 6 is located below the outer ring pipe 5, cooling water leaked into the annular closed space can be collected into the water collecting tank 6 in time to submerge the positive electrode 8 and the negative electrode 9 in time, so that the electrolysis main body device 10 is triggered to work in time, water in the water collecting tank 6 can be electrolyzed in time, water in the water collecting tank 6 is consumed in time, the hydrogen detector 11 also detects the increase of the hydrogen concentration in the exhaust pipe 7 in time, and an alarm is given.
Specifically, hydrogen gas detector 11 passes through LAN or wide area network wireless connection in staff monitor terminal, and the staff of being convenient for in time learns condenser tube 4 condition of leaking water.
Specifically, a power supply is installed in the electrolysis main body apparatus 10 for supplying electric current for the electrolyzed water reaction.
Specifically, the cooling water supply mechanism adopts a driving pump, the inlet of the driving pump is connected with an external water source through a pipeline, the external water source can adopt a water tank containing cooling water, the outlet of the driving pump is connected with the end part of the cooling water pipe 4, and the driving pump can drive the cooling water in the water tank to enter the cooling water pipe 4.
As shown in fig. 1 and fig. 2, in a specific embodiment, the exhaust pipe further includes a rain-proof cap 12, where the rain-proof cap 12 is disposed at the other end of the exhaust pipe 7, and is used for preventing rainwater from entering the exhaust pipe 7.
In the present embodiment, specifically, the exhaust pipe 7 is provided with a defensive cap, which can prevent external rainwater from flowing back into the water collecting tank 6 along the exhaust pipe 7, thereby preventing rainwater from triggering the electrolysis main device 10 to cause false alarm of the hydrogen detector 11.
In the specific embodiment, as shown in fig. 3, the electrolysis mechanism further comprises a relay 13, the positive electrode 8 and the electrolysis main body device 10 are connected through a coil 14 of the relay 13, and a normally open contact 15 of the relay 13 is electrically connected to an alarm 16.
In the present embodiment, the alarm 16 is specifically a live buzzer. When the water level in the water collecting tank 6 rises to the height of the positive electrode 8 and the negative electrode 9, the current flows through the circuit of the positive electrode 8, the electrolysis main body equipment 10 and the negative electrode 9, the current flows through the coil 14 of the relay 13, the normally open contact 15 of the relay 13 is closed, the circuit of the alarm 16 is electrified, and the alarm 16 sounds a whistle to play a role of on-site warning.
As shown in fig. 1 and fig. 2, in a specific embodiment, the present invention further includes a plurality of inspection wells 17, the number of the cooling water pipes 4 is plural, the number of the outer ring pipes 5 is plural, each of the outer ring pipes 5 is sleeved on one of the cooling water pipes 4, the plurality of cooling water pipes 4 are sequentially connected, the plurality of inspection wells 17 are sequentially arranged along the extending direction of the exhaust pipe 2, each of the cooling water pipes 4 is disposed between two adjacent inspection wells 17, one water collection tank 6, one exhaust pipe 7 and one electrolysis mechanism are correspondingly installed in each of the inspection wells 17, and the water collection tank 6 is connected to an end of the annular closed space.
In the present embodiment, in order to accurately position which cooling water pipe 4 has a water leaking wall, the cooling water pipes 4 and the outer collars 5 are coupled and sleeved one by one. When sand holes leak on the pipe wall of one cooling water pipe 4, the water collecting tank 6 connected with the peripheral annular closed space of the cooling water pipe 4 collects cooling water, the electrolysis mechanism starts to work, and the hydrogen detector 11 detects that the hydrogen concentration is increased and gives an alarm.
Through this embodiment, the staff can carry out accurate judgement to the pipeline section that leaks of condenser tube 4, and the local change of being convenient for avoids condenser tube 4 overall change, has reduced the running cost of 3 calandria 2 systems of cable.
In a specific embodiment, the cooling water pipes 4 are PPR pipes, the outer ring pipe 5 is a PE pipe, and two adjacent cooling water pipes 4 are connected by a hot-melt butt welding method.
In the present embodiment, specifically, since cooling water flows through the cooling water pipe 4 for a long period of time and receives the cooling water pressure, a PPR pipe material is used; and the annular closed space, the water collecting tank 6 and the exhaust pipe 7 are integrally communicated, so that the interior of the outer ring pipe 5 is at normal pressure, and the outer ring pipe 5 is made of a PE pipe material.
Specifically, when a certain cooling water pipe 4 needs to be replaced, the butt-welded portions at the two ends of the cooling water pipe 4 to be replaced are cut off, and then the two ends of the new cooling water pipe 4 are connected with the cooling water pipe 4 adjacent to the new cooling water pipe by a hot-melt butt welding method.
As shown in fig. 1, in the embodiment, the inspection well further comprises a base 18, the base 18 is cast at the bottom of the inspection well 17, and the water collection tank 6 is mounted on the base 18.
In the present embodiment, specifically, the water collection tank 6 is fixedly mounted on the base 18 by anchor bolts, so as to prevent the water collection tank 6 from deflecting, thereby enabling the positive electrode 8 and the negative electrode 9 to simultaneously contact with the rising water level.
As shown in fig. 1, in the specific embodiment, the precast block 1 includes a first precast block 101 and a second precast block 102 which are integrally cast, the second precast block 102 is located below the first precast block 101, and the width of the second precast block 102 is greater than the width of the first precast block 101.
In this embodiment, specifically, the first precast block 101 and the second precast block 102 are coaxially disposed, and the width of the second precast block 102 is larger than that of the first precast block 101, so as to provide a stable supporting force to the first precast block 101.
As shown in fig. 1 and 2, in the specific embodiment, a stainless steel braided hose 19 is further included, one end of the stainless steel braided hose 19 is screwed to the top wall of the water collecting tank 6, and the other end is screwed to the end of the annular closed space.
In this embodiment, the stainless steel braided hose 19 is readily available on the market, is durable, and has two ends that are screwed together, thereby facilitating replacement.
After the staff judges that a certain section of cooling water pipe 4 leaks, the operation of the cooling water supply mechanism is stopped, the inlet valve and the outlet valve of the cooling water pipe 4 are closed, after the water in the cooling water pipe 4 is completely leaked to the water collecting tank 6 through the sand holes and is consumed by the electrolysis main body equipment 10, the two ends of the stainless steel braided hose 19 are detached again, so that the water does not flow out from the annular closed space any more, the cable 3 in the exhaust pipe 2 cannot be polluted by the water, and on the basis, the staff replaces the section of the leaked cooling water pipe 4. Through the maintenance process, the cable 3 can not contact water all the time, and the potential safety hazard of electric power is avoided in the whole process.
In another aspect, another embodiment of the present invention further provides an alarm method for a power transmission cable duct bank system, including the following steps:
(1) when sand holes leak on the pipe wall of the cooling water pipe 4, water in the cooling water pipe 4 enters the annular closed space due to the self pressure, and then enters the water collecting tank 6;
(2) when the water level in the water collecting tank 6 rises to the height of the positive electrode 8 and the negative electrode 9, the electrolysis main body device 10 starts to operate, and the water in the water collecting tank 6 undergoes an electrolysis reaction to generate hydrogen and oxygen;
(3) the hydrogen detector 11 gives an alarm in association with the increase in the concentration of hydrogen discharged from the exhaust pipe 7.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. An electrical transmission cable racking system, comprising:
the prefabricated block is buried in the soil body, a calandria is installed in the prefabricated block, and a cable penetrates through the calandria;
the cooling water part comprises a cooling water pipe and an outer ring pipe which are arranged in the row pipe, the outer ring pipe is sleeved on the shaft side of the cooling water pipe, and the outer ring pipe and the cooling water pipe form an annular closed space;
the early warning part comprises a water collecting tank, an exhaust pipe and an electrolysis mechanism, wherein the water collecting tank is positioned below the outer ring pipe, the water collecting tank is connected to the annular closed space, one end of the exhaust pipe is connected to the upper end of the water collecting tank, the other end of the exhaust pipe extends to the ground surface, the electrolysis mechanism comprises a positive electrode, an electrolysis main device and a negative electrode which are sequentially connected, the positive electrode and the negative electrode are respectively installed on opposite side walls of the water collecting tank, and a hydrogen detector is installed on the inner side of the other end of the exhaust pipe.
2. The electrical transmission cable racking system of claim 1,
still include rain-proof cap, rain-proof cap set up in the other end of blast pipe is used for preventing the rainwater from getting into the blast pipe.
3. The electrical transmission cable racking system of claim 1,
the electrolysis mechanism further comprises a relay, the positive electrode is connected with the electrolysis main body equipment through a coil of the relay, and a normally open contact of the relay is electrically connected with the alarm.
4. An electric transmission cable racking system according to any one of claims 1 to 3,
the device is characterized by further comprising a plurality of inspection wells, the number of the cooling water pipes is multiple, the number of the outer ring pipes is multiple, each outer ring pipe is sleeved on one of the cooling water pipes, the cooling water pipes are sequentially connected, the inspection wells are sequentially arranged along the extension direction of the pipe array, each cooling water pipe is arranged between two adjacent inspection wells, one water collecting tank, one exhaust pipe and one electrolysis mechanism are correspondingly installed in each inspection well, and the water collecting tank is connected to the end part of the annular closed space.
5. An electric transmission cable racking system according to claim 4,
the cooling water pipes are PPR pipes, the outer ring pipe is a PE pipe, and two adjacent cooling water pipes are connected through a hot-melt butt welding method.
6. An electric transmission cable racking system according to claim 4,
still include the base, the base pour in the bottom of inspection shaft, the water catch bowl install in on the base.
7. An electric transmission cable racking system according to any one of claims 1 to 3,
the precast block comprises a first precast block and a second precast block which are integrally cast, the second precast block is positioned below the first precast block, and the width of the second precast block is greater than that of the first precast block.
8. An electric transmission cable racking system according to claim 4,
still include the stainless steel and weave the hose, the hose is woven to the stainless steel one end threaded connection in the roof of water catch bowl, other end threaded connection in the tip of annular confined space.
9. An alarm method for a power transmission cable duct bank system is characterized by comprising the following steps:
(1) when sand holes leak on the pipe wall of the cooling water pipe, water in the cooling water pipe enters the annular closed space due to the self pressure, and then enters the water collecting tank;
(2) when the water level in the water collecting tank rises to the height of the positive electrode and the negative electrode, the electrolysis main body equipment starts to operate, and the water in the water collecting tank performs an electrolysis reaction to generate hydrogen and oxygen;
(3) the hydrogen detector gives an alarm when the concentration of hydrogen discharged from the exhaust pipe rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334956.1A CN113991585A (en) | 2021-11-11 | 2021-11-11 | Power transmission cable duct arrangement system and alarm method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111334956.1A CN113991585A (en) | 2021-11-11 | 2021-11-11 | Power transmission cable duct arrangement system and alarm method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113991585A true CN113991585A (en) | 2022-01-28 |
Family
ID=79748044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111334956.1A Pending CN113991585A (en) | 2021-11-11 | 2021-11-11 | Power transmission cable duct arrangement system and alarm method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113991585A (en) |
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2021
- 2021-11-11 CN CN202111334956.1A patent/CN113991585A/en active Pending
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