CN115013741A - Prefabricated directly-buried heat preservation pipe with energy saving monitoring function and monitoring method thereof - Google Patents
Prefabricated directly-buried heat preservation pipe with energy saving monitoring function and monitoring method thereof Download PDFInfo
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- CN115013741A CN115013741A CN202210946916.0A CN202210946916A CN115013741A CN 115013741 A CN115013741 A CN 115013741A CN 202210946916 A CN202210946916 A CN 202210946916A CN 115013741 A CN115013741 A CN 115013741A
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- 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
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/40—Investigating fluid-tightness of structures by using electric means, e.g. by observing electric discharges
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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Abstract
The invention relates to the technical field of heat-insulating pipelines, in particular to a prefabricated directly-buried heat-insulating pipe with an energy-saving monitoring function, which comprises an inner pipe, an outer pipe, a heat-insulating layer, a temperature control switch, a current signal generator, a current signal detector, a wireless signal transmitter and a master controller, wherein the temperature control switch comprises a detection end, an anode wire and a cathode wire. This application is through evenly arranging a plurality of temperature detect switches that can detect heat preservation peripheral temperature in the periphery of outer tube for the inner tube leaks, and when the peripheral temperature of heat preservation risees gradually, anodal electric wire and negative pole electric wire can switch on, thereby make the current signal detector can detect the current signal that current signal generator sent, so that the total controller can control wireless signal sender and send signal to the surveillance center, so that the maintenance personal in time overhauls.
Description
Technical Field
The invention relates to the technical field of heat-insulating pipelines, in particular to a prefabricated direct-buried heat-insulating pipe with an energy-saving monitoring function. The invention also relates to a monitoring method of the prefabricated direct-buried heat-insulation pipe with the energy-saving monitoring function.
Background
The prefabricated direct-buried heat-insulating pipe is a heat-insulating pipeline buried underground, and has the excellent characteristics of high-efficiency heat insulation, water resistance, corrosion resistance, heat insulation, sound insulation, flame retardance, cold resistance, corrosion resistance, light capacity, high strength, simple and quick construction, no fear of plant root pricks and the like. The existing heat preservation pipeline is usually composed of an outer pipe, an inner pipe and a heat preservation layer, and because the heat preservation pipeline is buried underground, when leakage occurs in the inner pipe, the leakage of the heat preservation pipe at which section can not be determined in time, the heat loss of the heat supply pipeline is large, and great potential safety hazards are brought to civil heat supply and the like.
Chinese patent CN104373819B discloses a monitoring device and a monitoring method for an alarm line of a prefabricated directly-buried thermal insulation pipe. The method comprises the following steps: the prefabricated direct-buried heat preservation pipe is connected with a pipe fitting, an alarm signal transmission cable is preset in the prefabricated direct-buried heat preservation pipe and the pipe fitting and is connected with a group of alarms, the alarms are connected with a monitoring device, a liquid detection sensor is arranged on the alarm signal transmission cable, signal transmission equipment is installed in the alarms, and central control signal receiving equipment and a display screen are installed in the monitoring device.
The monitoring device cannot monitor all parts of the single-section heat preservation pipe.
Disclosure of Invention
Aiming at the problems, the prefabricated direct-buried insulating pipe with the energy-saving monitoring function is provided, and the problem that the single-section insulating pipe cannot be monitored comprehensively is solved through the current signal generator, the current signal detector and the temperature control switches.
In order to solve the problems of the prior art, the invention adopts the technical scheme that:
a prefabricated direct-buried heat preservation pipe with an energy-saving monitoring function comprises an inner pipe, an outer pipe, a heat preservation layer, a temperature control switch, a current signal generator, a current signal detector, a wireless signal transmitter and a master controller, wherein the temperature control switch is uniformly arranged on the periphery of the outer pipe and is provided with a detection end which penetrates through the outer pipe and can detect the peripheral temperature of the heat preservation layer; the output end of the current signal generator is communicated with the anode wire, and the input end of the current signal generator is communicated with the cathode wire; the current signal detector is arranged on a connecting line between the input end of the current signal generator and the negative electrode wire and is used for detecting whether an electric signal flows; the current signal generator, the current signal detector and the wireless signal transmitter are all electrically connected with the master controller, and the current signal detector is used for transmitting position information to the monitoring center.
Preferably, the circumferential surface of the outer tube is uniformly provided with detection ports, the detection ports extend along the radial direction of the outer tube, and the temperature control switch further comprises a round box body, a metal cover, a piston, a metal sheet, an elastic guide part and liquid; the round box body is coaxially arranged in the detection port, the bottom end of the round box body is provided with an opening, and the positive wire and the negative wire penetrate through the round box body along the radial direction; the metal cover is coaxially screwed at the bottom end of the round box body to form a detection end which is abutted against the periphery of the heat insulation layer; the piston is coaxially and slidably arranged in the round box body; the metal sheet is arranged at one end of the piston deviating from the axis of the outer tube, and the metal sheet can break the positive wire and the negative wire in a conductive mode; the elastic guide piece is coaxially arranged in the metal cover, the elastic guide piece is in elastic sliding fit with the piston, and the piston is elastically abutted against the metal sheet; a liquid is injected into the cavity between the metal cap and the piston.
Preferably, the inner end surface of the metal cover is provided with heat conduction fins at equal intervals.
Preferably, the metal cover is made of copper or aluminum.
Preferably, the elastic guide includes a fixed post and a spring; at least two fixing columns are coaxially and fixedly arranged in the inner cavity of the round box body, and one ends of the fixing columns penetrate through the piston and are in sliding fit with the piston; the spring is sleeved on the fixed column, and two ends of the spring are respectively abutted against the inner ends of the piston and the round box body.
Preferably, the piston is provided with a trapezoidal groove towards the inner end face of the round box body, one end of the trapezoidal groove towards the inner end face of the round box body is a lower bottom, clamping blocks are further arranged on two sides of the trapezoidal groove, the clamping blocks incline towards one side of the upper bottom of the trapezoidal groove and extend downwards, and notches are formed between two sides of the clamping blocks and the waist of the trapezoidal groove; the metal sheet comprises a concave part and an abutting part used for communicating the positive electrode wire and the negative electrode wire, and the concave part is in sliding fit with the inclined plane of the clamping block and then deforms and is clamped between the clamping block and the upper bottom of the trapezoidal groove.
Preferably, the circumferential surface of the piston is further provided with a ring groove coaxial with the piston, the temperature control switch further comprises a sealing ring, the sealing ring is sleeved on the ring groove, and the sealing ring is in interference fit with the inner wall of the round box body.
Preferably, the liquid is kerosene or alcohol.
Preferably, the heat preservation device further comprises a heat preservation assembly, the outer end of the detection port is provided with a first fixing lug along the circumferential direction of the detection port, and the heat preservation assembly comprises a sealing cover, a bolt, polyurethane foam and a blocking plug; the sealing cover is coaxially sleeved at the outer end of the round box body, a cover-shaped cavity is formed by the inner wall of the sealing cover and the periphery of the round box body, a second fixing lug is arranged on the periphery of the sealing cover, and a stepped injection opening is also formed in the top end of the sealing cover; the bolt is in threaded connection with the second fixing lug and the first fixing lug; polyurethane foam is injected into the cavity through the injection port; the sealing plug is coaxially screwed on the injection port.
A monitoring method of a prefabricated directly-buried heat preservation pipe with an energy-saving monitoring function is disclosed, wherein the prefabricated directly-buried heat preservation pipe comprises an inner pipe, an outer pipe, a heat preservation layer, a temperature control switch, a current signal generator, a current signal detector, a wireless signal transmitter and a master controller; the temperature control switch is uniformly arranged on the periphery of the outer pipe, the temperature control switch is provided with a detection end which penetrates through the outer pipe and can detect the peripheral temperature of the insulating layer, the temperature control switch also comprises a positive electrode wire and a negative electrode wire, the positive electrode wire and the negative electrode wire are conducted when the temperature at the detection end rises, all the positive electrode wires are connected in series, and all the negative electrode wires are connected in series; the output end of the current signal generator is communicated with the anode wire, and the input end of the current signal generator is communicated with the cathode wire; the current signal detector is arranged on a connecting line between the input end of the current signal generator and the negative electrode wire and is used for detecting whether an electric signal flows; the current signal generator, the current signal detector and the wireless signal transmitter are electrically connected with the master controller, and the current signal detector is used for transmitting position information to the monitoring center; the monitoring method comprises the following steps:
s1, the current signal generator continuously outputs a current signal to the positive wire;
s2, when the inner pipe is not leaked, namely the temperature of the periphery of the heat insulation layer is low, the positive electrode wire and the negative electrode wire cannot be conducted, the current signal sent by the current signal generator cannot be transmitted to the negative electrode wire through the positive electrode wire, the current signal detector cannot detect the current signal, and the wireless signal transmitter is not needed to give an early warning to a monitoring center;
s3, when the inner pipe leaks, the heat in the inner pipe overflows, the temperature of the outer periphery of the heat insulation layer gradually rises, the positive wire and the negative wire are conducted, the current signal sent by the current signal generator is transmitted to the negative wire by the positive wire, the current signal detector detects the current signal, and the master controller controls the wireless signal generator to give an early warning to the monitoring center and send position information;
and S4, sending maintenance personnel to the leakage point for maintenance by the monitoring center.
Compared with the prior art, the beneficial effect of this application is:
this application is through evenly arranging a plurality of temperature detect switches that can detect heat preservation peripheral temperature in the periphery of outer tube for the inner tube leaks, and when the peripheral temperature of heat preservation risees gradually, anodal electric wire and negative pole electric wire can switch on, thereby make the current signal detector can detect the current signal that current signal generator sent, so that the total controller can control wireless signal sender and send signal to the surveillance center, so that the maintenance personal in time overhauls.
Drawings
FIG. 1 is a perspective view of a prefabricated direct-burried insulating pipe of the present application;
FIG. 2 is a side view of a prefabricated direct-burried insulating pipe of the present application;
FIG. 3 is a cross-sectional view at section A-A of FIG. 2;
FIG. 4 is an enlarged view of a portion of FIG. 3 at D;
FIG. 5 is a perspective view of the temperature controlled switch of the present application;
FIG. 6 is a front view of the temperature controlled switch of the present application;
FIG. 7 is a cross-sectional view at section E-E of FIG. 6;
FIG. 8 is a perspective view of the piston and metal sheet of the present application;
fig. 9 is an exploded perspective view of the piston and sheet metal of the present application.
The reference numbers in the figures are: 1-inner tube; 2-an outer tube; 2 a-a detection port; 2a 1-first fastening ear; 2 b-a shield; 3, insulating layer; 4-temperature control switch; 4 a-a detection end; 4 b-positive electrode wire; 4 c-negative electrode wire; 4 d-round box body; 4 e-a metal cover; 4e 1-thermally conductive sheet; 4 f-piston; 4f 1-trapezoidal groove; 4f 2-cartridge; 4f 3-ring groove; 4 g-metal sheet; 4 h-elastic guide; 4h 1-fixed column; 4h 2-spring; 4 i-liquid; 4 j-sealing ring; 5-a current signal generator; 6-a current signal detector; 7-a wireless signal emitter; 8-a master controller; 9 a-a sealing cover; 9a 1-second fastening ear; 9a 2-injection port; 9 b-bolt; 9 c-a polyurethane foam; 9 d-blocking.
Detailed Description
For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in fig. 1-9, the present application provides:
a prefabricated direct-buried heat preservation pipe with an energy-saving monitoring function comprises an inner pipe 1, an outer pipe 2, a heat preservation layer 3, a temperature control switch 4, a current signal generator 5, a current signal detector 6, a wireless signal transmitter 7 and a master controller 8, wherein the temperature control switch 4 is uniformly arranged on the periphery of the outer pipe 2, the temperature control switch 4 is provided with a detection end 4a which penetrates through the outer pipe 2 and can detect the peripheral temperature of the heat preservation layer 3, the temperature control switch 4 further comprises a positive wire 4b and a negative wire 4c, the positive wire 4b is conducted with the negative wire 4c when the temperature at the detection end 4a rises, all the positive wires 4b are connected in series, and all the negative wires 4c are connected in series;
the output end of the current signal generator 5 is communicated with the positive electrode wire 4b, and the input end of the current signal generator 5 is communicated with the negative electrode wire 4 c;
the current signal detector 6 is arranged on a connecting line between the input end of the current signal generator 5 and the negative electrode wire 4c and is used for detecting whether an electric signal flows;
the current signal generator 5, the current signal detector 6 and the wireless signal emitter 7 are all electrically connected with a master controller 8, and the current signal detector 6 is used for sending position information to a monitoring center.
The prefabricated directly-buried heat preservation pipe body comprises an inner pipe 1, an outer pipe 2 and a heat preservation layer 3, wherein the outer pipe 2 is coaxially arranged on the periphery of the inner pipe 1, and polyurethane foam is injected between the inner periphery of the outer pipe 2 and the outer periphery of the inner pipe 1 to form the heat preservation layer 3;
after the body is machined and molded, a temperature control switch 4, a current signal generator 5, a current signal detector 6, a wireless signal emitter 7 and a master controller 8 are installed;
when the inner pipe 1 is not corroded, namely, the heat flow cannot overflow to the heat preservation layer 3 through the inner pipe 1, namely, the heat preservation layer 3 can gather heat in the inner pipe 1, the peripheral temperature of the heat preservation layer 3 is stable, and the anode wire 4b and the cathode wire 4c in the temperature control switch 4 cannot be conducted, namely, the current sent by the current signal generator 5 cannot form a complete channel, and the current signal detector 6 cannot detect a current signal, so that the section of heat preservation pipe is not leaked;
when the inner pipe 1 of a certain section of the heat preservation pipe leaks, heat gradually diffuses outwards through the heat preservation layer 3, namely the heat is transferred to the detection end 4a through the heat preservation layer 3, so that the anode wire 4b and the cathode wire 4c are conducted, further, a complete passage is formed among the current signal generator 5, the anode wire 4b and the cathode wire 4c, a current signal can be detected by the current signal detector 6, the current signal detector 6 controls the wireless signal emitter 7 to send a signal to the monitoring center, the monitoring center determines which part of the heat preservation pipe leaks, and accordingly maintenance personnel are discharged to the point to maintain;
it should be noted that: the pipeline is laid by a plurality of sections of heat preservation pipes, and each section of heat preservation pipe is provided with a set of independent temperature control switch 4, a current signal generator 5, a current signal detector 6, a wireless signal transmitter 7 and a master controller 8;
it can also be confirmed from fig. 1 that the positive lines of all the temperature controlled switches 4 on only one section of the thermal insulation pipe are connected in series, and the negative lines are also connected in series, and because of the need of drawing, only one section of the thermal insulation pipe is drawn, and the temperature controlled switches 4, the current signal generator 5, the current signal detector 6, the wireless signal emitter 7 and the master controller 8 on the adjacent thermal insulation pipe are not connected;
when the temperature control switch at a certain position on the heat preservation pipe acts, the leakage of the section of the heat preservation pipe is indicated, and during maintenance, a worker can directly replace a new heat preservation pipe without specifically determining which temperature control switch acts;
because each section of heat preservation pipe is provided with a set of independent temperature control switch 4, a current signal generator 5, a current signal detector 6, a wireless signal emitter 7 and a master controller 8, each section of heat preservation pipe corresponds to one wireless signal emitter independently, and the signals sent to a monitoring center by each wireless signal emitter are different, so that the leakage of the heat preservation pipe at the position is determined.
In addition: as can be seen from fig. 1, the current signal generator 5, the current signal detector 6, the wireless signal transmitter 7 and the master controller 8 are a single system with respect to the thermal insulation pipe and the temperature controlled switch buried underground, and the system can be installed on the ground, thereby ensuring the stability of wireless connection.
Because the temperature control switches 4 are uniformly distributed on the periphery of the outer pipe 2, and the length of a single heat preservation pipe is long, the heat preservation pipe can be comprehensively monitored through the uniformly distributed temperature control switches 4, when the inner pipe 1 of the heat preservation pipe leaks, namely the temperature control switch 4 at the position can be communicated with the positive electric wire 4b and the negative electric wire 4c, and therefore the current signal generator 5, the positive electric wire 4b and the negative electric wire 4c form a passage;
the current signal generator 5 is a battery, the positive pole of the battery is communicated with the positive pole wire 4b, the negative pole of the battery is communicated with the negative pole wire 4c, when one or more temperature control switches 4 are switched on, a normal passage can be formed between the battery and a circuit, so that a current signal can be monitored by the current signal detector 6, and the current signal detector 6 is a current sensor which is a detection device capable of sensing the information of the current to be detected and converting the sensed information into an electric signal meeting the requirements of a certain standard or information in other required forms to be output according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like; the current signal detector 6 can detect a current signal, so that the current signal is sent to the master controller 8, and the master controller 8 controls the wireless signal emitter 7 to send a signal to the monitoring center.
This application is through evenly arranging a plurality of temperature detect switch 4 that can detect 3 peripheral temperature of heat preservation in the periphery of outer tube 2, make inner tube 1 leak, and when the peripheral temperature of heat preservation 3 risees gradually, anodal electric wire 4b and negative pole electric wire 4c can switch on, thereby make current signal detector 6 can detect the current signal that current signal generator 5 sent, so that total controller 8 can control wireless signal sender 7 and send a signal to the surveillance center, so that the maintenance personal in time overhauls, thereby the unable timely early warning of current heat preservation pipe leaks and the unable problem that detects the heat preservation pipe leak point completely.
As shown in fig. 4, further:
the circumferential surface of the outer tube 2 is uniformly provided with detection ports 2a, the detection ports 2a extend along the radial direction of the outer tube 2, and the temperature control switch 4 further comprises a round box body 4d, a metal cover 4e, a piston 4f, a metal sheet 4g, an elastic guide piece 4h and liquid 4 i;
a round box body 4d is coaxially arranged in the detection port 2a, the bottom end of the round box body 4d is opened, and the positive electrode wire 4b and the negative electrode wire 4c penetrate through the round box body 4d along the radial direction;
the metal cover 4e is coaxially screwed on the bottom end of the round box body 4d to form a detection end 4a which is abutted against the periphery of the heat preservation layer 3;
the piston 4f is coaxially and slidably arranged in the round box body 4 d;
the metal sheet 4g is arranged at one end of the piston 4f deviated from the axis of the outer tube 2, and the metal sheet 4g disconnects the positive electrode wire 4b and the negative electrode wire 4c in a conductive manner;
the elastic guide piece 4h is coaxially arranged in the metal cover 4e, the elastic guide piece 4h is in elastic sliding fit with the piston 4f, and the piston 4f is elastically abutted against the metal sheet 4 g;
a liquid 4i is injected into the cavity between the metal cap 4e and the piston 4 f.
A round box body 4d is coaxially arranged in the detection port 2a, the bottom end of the round box body 4d is opened, a metal cover 4e is coaxially screwed at the opening of the round box body 4d, so that the metal cover 4e is abutted against the periphery of the heat preservation layer 3, a piston 4f is coaxially and slidably arranged in the round box body 4d, a pressure cavity is formed between the piston 4f and the metal cover 4e, a metal sheet 4g is arranged on the piston 4f, when the inner pipe 1 is not leaked, the periphery of the heat preservation layer 3 has no heat transfer, namely the pressure in the pressure cavity is constant, the piston 4f maintains the size of the pressure cavity under the elastic force of an elastic guide piece 4h, and at the moment, the metal sheet 4g is not communicated with the positive electrode wire 4b and the negative electrode wire 4 c; when the inner tube 1 leaks and heat overflows through the heat preservation layer 3, the temperature of the outer periphery of the heat preservation layer 3 rises, the liquid 4i expands due to heat to increase the pressure of the pressure cavity, and further the piston 4f is close to the inner end face of the round box body 4d against the elastic force of the elastic guide piece 4h, namely the metal sheet 4g is close to and abutted against the positive electrode wire 4b and the negative electrode wire 4c, so that the positive electrode wire 4b and the negative electrode wire 4c are communicated, and a passage can be formed among the current signal generator 5, the positive electrode wire 4b and the negative electrode wire 4 c;
liquid 4i through the thermal expansion can guide piston 4f to overcome the elasticity of elastic guide 4h and communicate anodal electric wire 4b and negative pole electric wire 4c to current signal detector 6 detects there is the electric current to pass through, thereby carries out the early warning by wireless signal sender 7 and total controller 8, has solved the unable accurate heat preservation 3 periphery of detecting of current monitoring device and has carried out the problem of early warning.
As shown in fig. 4, further:
the inner end surface of the metal cover 4e is provided with heat conductive sheets 4e1 at equal intervals.
When the temperature of the outer periphery of the heat insulating layer 3 is gradually raised by arranging the heat conducting fins 4e1 at equal intervals on the inner end surface of the metal cover 4e, the heat can be timely transferred to the piston 4f through the heat conducting fins 4e1, so that the piston 4f expands to drive the piston 4f to slide in the round box body 4d, and the contact area between the heat and the liquid 4i is increased.
As shown in fig. 4, further:
the metal cover 4e is made of copper or aluminum.
The material of metal lid 4e is copper or aluminium, and the metal lid 4e that copper or aluminium were made can give liquid 4i with heat fast transfer, and the cost is lower simultaneously, practices thrift the cost, and then has solved the problem of how to improve metal lid 4e heat transfer effect.
As shown in fig. 7, further:
the elastic guide 4h comprises a fixed column 4h1 and a spring 4h 2;
at least two fixing columns 4h1 are provided, the fixing columns 4h1 are coaxially and fixedly arranged in the inner cavity of the round box body 4d, and one end of each fixing column 4h1 penetrates through the piston 4f and is in sliding fit with the piston 4 f;
the spring 4h2 is sleeved on the fixed column 4h1, and two ends of the spring 4h2 are respectively abutted against the piston 4f and the inner end of the round box body 4 d.
The fixing column 4h1 is coaxially and fixedly arranged at the inner end face of the round box body 4d, so that the fixing column 4h1 can penetrate through the piston 4f and is in sliding fit with the piston 4f, the number of the fixing columns 4h1 is at least two, the piston 4f cannot rotate in the negative electrode wire 4c, the metal sheet 4g cannot rotate in the round box body 4d, and the situation that the metal sheet 4g cannot communicate with the positive electrode wire 4b and the negative electrode wire 4c due to rotation is avoided.
As shown in fig. 7, 8 and 9, further:
a trapezoidal groove 4f1 is formed in the inner end face, facing the round box body 4d, of the piston 4f, a lower bottom is formed in one end, facing the inner end face of the round box body 4d, of the trapezoidal groove 4f1, a clamping block 4f2 is further arranged on two sides of the trapezoidal groove 4f1, the clamping block 4f2 inclines towards one side of the upper bottom of the trapezoidal groove 4f1 and extends downwards, and a notch is formed between two sides of the clamping block 4f2 and the waist of the trapezoidal groove 4f 1; the metal sheet 4g includes a concave portion and an abutting portion for communicating the positive electric wire 4b and the negative electric wire 4c, and the concave portion is deformed and clamped between the latch 4f2 and the upper bottom of the trapezoidal groove 4f1 after being slidably fitted with the inclined surface of the latch 4f 2.
The piston 4f is enabled to face the inner end face of the round box body 4d to form a trapezoidal groove 4f1, clamping blocks 4f2 are formed on two sides of the trapezoidal groove 4f1, the concave portion of the metal sheet 4g is pressed to the upper bottom of the trapezoidal groove 4f1, in the process, the metal sheet 4g is in sliding fit with the inclined face of the clamping block 4f2 to deform until the concave portion of the metal sheet 4g is completely clamped between the clamping block 4f2 and the lower bottom of the trapezoidal groove 4f1, and therefore the abutting portion of the piston 4f can be stably connected with the positive wire 4b and the negative wire 4 c.
As shown in fig. 4 and 7, further:
the circumferential surface of the piston 4f is also provided with a ring groove 4f3 coaxial with the piston, the temperature control switch 4 further comprises a sealing ring 4j, the sealing ring 4j is sleeved on the ring groove 4f3, and the sealing ring 4j is in interference fit with the inner wall of the round box body 4 d.
The circumferential surface of the piston 4f is provided with a ring groove 4f3 coaxial with the piston 4f, and then the sealing ring 4j is sleeved on the ring groove 4f3 to be in interference fit with the inner wall of the round box body 4d, so that the liquid 4i can be effectively prevented from overflowing into a cavity between the inner end surface of the round box body 4d and the piston 4f through a gap.
As shown in fig. 4, further:
the liquid 4i is kerosene or alcohol.
The liquid 4i is kerosene or alcohol, which has a high thermal expansion coefficient and is lower in cost, and the piston 4f slides more easily in a state where the metal cap 4e is continuously heated, so that the metal piece 4g conducts the positive electrode wire 4b and the negative electrode wire 4 c.
As shown in fig. 4, further:
the detection device is characterized by further comprising a heat preservation assembly, wherein the outer end of the detection port 2a is provided with a first fixing lug 2a1 along the circumferential direction, and the heat preservation assembly comprises a sealing cover 9a, a bolt 9b, polyurethane foam 9c and a blocking plug 9 d;
the sealing cover 9a is coaxially sleeved at the outer end of the round box body 4d, a cover-shaped cavity is formed by the inner wall of the sealing cover 9a and the periphery of the round box body 4d, a second fixing lug 9a1 is arranged on the periphery of the sealing cover 9a, and a step-shaped injection opening 9a2 is further formed in the top end of the sealing cover 9 a;
the bolt 9b is in threaded connection with the second fixing lug 9a1 and the first fixing lug 2a 1;
the urethane foam 9c is injected into the cavity through the injection port 9a 2;
the plug 9d is screwed coaxially to the inlet 9a 2.
By providing the first fixing lug 2a1 at the outer periphery of the inspection port 2a, so that the bolt 9b can fix the second fixing lug 9a1 and the first fixing lug 2a1 together, so that a cavity can be formed between the sealing cover 9a and the round box body 4d, polyurethane foam 9c is injected into the cavity through the 9b2, thereby preventing the external temperature from affecting the inspection part of the inspection terminal 4a, and simultaneously, the injection port 9a2 is blocked through the blocking plug 9d, thereby preventing the polyurethane foam 9c from being corroded by the outside.
As some optional embodiments of this application, still include protection casing 2b, protection casing 2b covers and establishes in the periphery of outer tube 2, and temperature detect switch 4 and the circuit that is used for connecting all are located protection casing 2b to this avoids burying the insulating tube after underground, soil erosion line and temperature detect switch 4, and then makes the detection structure can be more accurate.
A monitoring method of a prefabricated directly-buried insulating pipe with an energy-saving monitoring function comprises the following steps that the prefabricated directly-buried insulating pipe comprises an inner pipe 1, an outer pipe 2, an insulating layer 3, a temperature control switch 4, a current signal generator 5, a current signal detector 6, a wireless signal emitter 7 and a master controller 8; the temperature control switches 4 are uniformly arranged on the periphery of the outer pipe 2, the temperature control switches 4 are provided with detection ends 4a which penetrate through the outer pipe 2 and can detect the temperature of the periphery of the heat preservation layer 3, the temperature control switches 4 further comprise positive electric wires 4b and negative electric wires 4c, when the temperature at the detection ends 4a rises, the positive electric wires 4b are conducted with the negative electric wires 4c, all the positive electric wires 4b are connected in series, and all the negative electric wires 4c are connected in series; the output end of the current signal generator 5 is communicated with the positive electrode wire 4b, and the input end of the current signal generator 5 is communicated with the negative electrode wire 4 c; the current signal detector 6 is arranged on a connecting line between the input end of the current signal generator 5 and the negative electrode wire 4c and is used for detecting whether an electric signal flows; the current signal generator 5, the current signal detector 6 and the wireless signal emitter 7 are electrically connected with a master controller 8, and the current signal detector 6 is used for sending position information to a monitoring center; the monitoring method comprises the following steps:
s1, the current signal generator 5 continuously outputs a current signal to the positive electrode wire 4 b;
s2, when the inner pipe 1 is not leaked, namely the temperature of the periphery of the insulating layer 3 is low, the positive wire 4b and the negative wire 4c cannot be conducted, the current signal sent by the current signal generator 5 cannot be transmitted to the negative wire 4c through the positive wire 4b, the current signal detector 6 cannot detect the current signal, and the wireless signal sender 7 is not needed to give an early warning to the monitoring center;
s3, when the inner pipe 1 leaks, the heat in the inner pipe 1 overflows, the temperature of the outer periphery of the heat insulation layer 3 gradually rises, the positive wire 4b and the negative wire 4c are conducted, the current signal sent by the current signal generator 5 is transmitted to the negative wire 4c by the positive wire 4b, the current signal detector 6 detects the current signal, and the master controller 8 controls the wireless signal sender 7 to give an early warning to a monitoring center and send position information;
and S4, sending maintenance personnel to the leakage point for maintenance by the monitoring center.
The above examples, which are intended to represent only one or more embodiments of the present invention, are described in greater detail and with greater particularity, and are not to be construed as limiting the scope of the invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A prefabricated direct-buried heat preservation pipe with an energy-saving monitoring function comprises an inner pipe (1), an outer pipe (2), a heat preservation layer (3), a temperature control switch (4), a current signal generator (5), a current signal detector (6), a wireless signal emitter (7) and a master controller (8), and is characterized in that the inner pipe is a hollow pipe; the temperature control switches (4) are uniformly arranged on the periphery of the outer pipe (2), each temperature control switch (4) is provided with a detection end (4 a) which penetrates through the outer pipe (2) and can detect the peripheral temperature of the heat preservation layer (3), each temperature control switch (4) further comprises a positive electrode wire (4 b) and a negative electrode wire (4 c), the positive electrode wires (4 b) and the negative electrode wires (4 c) are conducted when the temperature of the detection end (4 a) rises, all the positive electrode wires (4 b) are connected in series, and all the negative electrode wires (4 c) are connected in series;
the output end of the current signal generator (5) is communicated with the positive electrode wire (4 b), and the input end of the current signal generator (5) is communicated with the negative electrode wire (4 c);
the current signal detector (6) is arranged on a connecting line between the input end of the current signal generator (5) and the negative electrode wire (4 c) and is used for detecting whether an electric signal flows;
the current signal generator (5), the current signal detector (6) and the wireless signal transmitter (7) are electrically connected with the master controller (8), and the current signal detector (6) is used for sending position information to the monitoring center.
2. The prefabricated directly-buried heat preservation pipe with the energy saving monitoring function according to claim 1, wherein detection ports (2 a) are uniformly distributed on the circumferential surface of the outer pipe (2), the detection ports (2 a) extend along the radial direction of the outer pipe (2), and the temperature control switch (4) further comprises a round box body (4 d), a metal cover (4 e), a piston (4 f), a metal sheet (4 g), an elastic guide (4 h) and liquid (4 i);
the round box body (4 d) is coaxially arranged in the detection port (2 a), the bottom end of the round box body (4 d) is opened, and the positive electrode wire (4 b) and the negative electrode wire (4 c) penetrate through the round box body (4 d) along the radial direction;
the metal cover (4 e) is coaxially screwed at the bottom end of the round box body (4 d) to form a detection end (4 a) which is abutted against the periphery of the heat insulation layer (3);
the piston (4 f) is coaxially and slidably arranged in the round box body (4 d);
the metal sheet (4 g) is arranged at one end of the piston (4 f) deviated from the axis of the outer tube (2), and the metal sheet (4 g) disconnects the positive wire (4 b) and the negative wire (4 c) in a conductive mode;
the elastic guide piece (4 h) is coaxially arranged in the metal cover (4 e), the elastic guide piece (4 h) is in elastic sliding fit with the piston (4 f), and the piston (4 f) is elastically abutted against the metal sheet (4 g);
a liquid (4 i) is injected into the cavity between the metal cap (4 e) and the piston (4 f).
3. The prefabricated direct-burried thermal insulation pipe with energy conservation monitoring function of claim 2, wherein the inner end face of the metal cover (4 e) is provided with heat conduction fins (4 e 1) at equal intervals.
4. The prefabricated direct-buried heat preservation pipe with the energy-saving monitoring function as claimed in claim 2 or 3, wherein the metal cover (4 e) is made of copper or aluminum.
5. The prefabricated direct-burial thermal insulation pipe with the energy-saving monitoring function according to claim 2 or 3, wherein the elastic guide (4 h) comprises a fixing post (4 h 1) and a spring (4 h 2);
at least two fixing columns (4 h 1), wherein the fixing columns (4 h 1) are coaxially and fixedly arranged in the inner cavity of the round box body (4 d), and one end of each fixing column (4 h 1) penetrates through the piston (4 f) and is in sliding fit with the piston (4 f);
the spring (4 h 2) is sleeved on the fixing column (4 h 1), and two ends of the spring (4 h 2) are respectively abutted to the inner ends of the piston (4 f) and the round box body (4 d).
6. The prefabricated directly-buried thermal insulation pipe with the energy-saving monitoring function as claimed in claim 2 or 3, wherein the inner end surface of the piston (4 f) facing the round box body (4 d) is provided with a trapezoidal groove (4 f 1), one end of the trapezoidal groove (4 f 1) facing the inner end surface of the round box body (4 d) is a lower bottom, two sides of the trapezoidal groove (4 f 1) are also provided with a fixture block (4 f 2), the fixture block (4 f 2) inclines towards one side of the upper bottom of the trapezoidal groove (4 f 1) and extends downwards, and a notch is formed between two sides of the fixture block (4 f 2) and the waist of the trapezoidal groove (4 f 1); the metal sheet (4 g) comprises a concave part and an abutting part for communicating the positive electric wire (4 b) with the negative electric wire (4 c), and the concave part is in sliding fit with the inclined surface of the clamping block (4 f 2) and then is deformed and clamped between the clamping block (4 f 2) and the upper bottom of the trapezoidal groove (4 f 1).
7. The prefabricated direct-buried heat preservation pipe with the energy-saving monitoring function is characterized in that a ring groove (4 f 3) coaxial with the piston (4 f) is further formed in the circumferential surface of the piston (4 f), the temperature control switch (4) further comprises a sealing ring (4 j), the sealing ring (4 j) is sleeved on the ring groove (4 f 3), and the sealing ring (4 j) is in interference fit with the inner wall of the round box body (4 d).
8. The prefabricated direct-buried heat-insulating pipe with the energy-saving monitoring function according to claim 2 or 3, wherein the liquid (4 i) is kerosene or alcohol.
9. The prefabricated direct-burried thermal insulation pipe with energy-saving monitoring function according to claim 2 or 3, characterized by further comprising a thermal insulation component, wherein the outer end of the detection port (2 a) is provided with a first fixing lug (2 a 1) along the circumferential direction thereof, and the thermal insulation component comprises a sealing cover (9 a), a bolt (9 b), polyurethane foam (9 c) and a sealing plug (9 d);
the sealing cover (9 a) is coaxially sleeved at the outer end of the round box body (4 d), a cover-shaped cavity is formed by the inner wall of the sealing cover (9 a) and the periphery of the round box body (4 d), a second fixing lug (9 a 1) is arranged on the periphery of the sealing cover (9 a), and a step-shaped injection opening (9 a 2) is further formed in the top end of the sealing cover (9 a);
the bolt (9 b) is in threaded connection with the second fixing lug (9 a 1) and the first fixing lug (2 a 1);
a polyurethane foam (9 c) is injected into the cavity through an injection port (9 a 2);
the plug (9 d) is screwed coaxially to the inlet (9 a 2).
10. A monitoring method of a prefabricated directly-buried heat-insulating pipe with an energy-saving monitoring function is characterized in that the prefabricated directly-buried heat-insulating pipe comprises an inner pipe (1), an outer pipe (2), a heat-insulating layer (3), a temperature control switch (4), a current signal generator (5), a current signal detector (6), a wireless signal emitter (7) and a master controller (8); the temperature control switches (4) are uniformly arranged on the periphery of the outer pipe (2), each temperature control switch (4) is provided with a detection end (4 a) which penetrates through the outer pipe (2) and can detect the peripheral temperature of the heat preservation layer (3), each temperature control switch (4) further comprises a positive electrode wire (4 b) and a negative electrode wire (4 c), the positive electrode wires (4 b) and the negative electrode wires (4 c) are conducted when the temperature of the detection end (4 a) rises, all the positive electrode wires (4 b) are connected in series, and all the negative electrode wires (4 c) are connected in series; the output end of the current signal generator (5) is communicated with the positive electrode wire (4 b), and the input end of the current signal generator (5) is communicated with the negative electrode wire (4 c); the current signal detector (6) is arranged on a connecting line between the input end of the current signal generator (5) and the negative electrode wire (4 c) and is used for detecting whether an electric signal flows; the current signal generator (5), the current signal detector (6) and the wireless signal transmitter (7) are electrically connected with the master controller (8), and the current signal detector (6) is used for sending position information to the monitoring center; the monitoring method comprises the following steps:
s1, the current signal generator (5) continuously outputs a current signal to the positive electrode wire (4 b);
s2, when the inner pipe (1) is not leaked, namely the peripheral temperature of the heat insulation layer (3) is low, the positive wire (4 b) and the negative wire (4 c) cannot be conducted, a current signal sent by the current signal generator (5) cannot be transmitted to the negative wire (4 c) through the positive wire (4 b), the current signal detector (6) cannot detect the current signal, and the wireless signal transmitter (7) is not needed to give an early warning to a monitoring center;
s3, when the inner pipe (1) leaks, heat in the inner pipe (1) overflows, the temperature of the outer periphery of the heat insulation layer (3) gradually rises, the positive electrode wire (4 b) and the negative electrode wire (4 c) are conducted, a current signal sent by the current signal generator (5) is transmitted to the negative electrode wire (4 c) through the positive electrode wire (4 b), the current signal is detected by the current signal detector (6), and the master controller (8) controls the wireless signal transmitter (7) to give an early warning to a monitoring center and send position information;
and S4, sending maintenance personnel to the leakage point for maintenance by the monitoring center.
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