CN108362399B - Temperature measurement cable - Google Patents
Temperature measurement cable Download PDFInfo
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- CN108362399B CN108362399B CN201810407280.6A CN201810407280A CN108362399B CN 108362399 B CN108362399 B CN 108362399B CN 201810407280 A CN201810407280 A CN 201810407280A CN 108362399 B CN108362399 B CN 108362399B
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- 238000009529 body temperature measurement Methods 0.000 title claims description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 125
- 239000002184 metal Substances 0.000 claims abstract description 125
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 105
- 239000010959 steel Substances 0.000 claims abstract description 105
- 230000001681 protective effect Effects 0.000 claims abstract description 75
- 238000009434 installation Methods 0.000 claims abstract description 34
- 230000002633 protecting effect Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 3
- QWCRAEMEVRGPNT-UHFFFAOYSA-N buspirone Chemical compound C1C(=O)N(CCCCN2CCN(CC2)C=2N=CC=CN=2)C(=O)CC21CCCC2 QWCRAEMEVRGPNT-UHFFFAOYSA-N 0.000 claims description 2
- 239000000084 colloidal system Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 229910052723 transition metal Inorganic materials 0.000 claims 1
- 150000003624 transition metals Chemical class 0.000 claims 1
- 239000003245 coal Substances 0.000 description 11
- 238000012544 monitoring process Methods 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/10—Thermometers specially adapted for specific purposes for measuring temperature within piled or stacked materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/22—Metal wires or tapes, e.g. made of steel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/2806—Protection against damage caused by corrosion
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
- H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/42—Insulated conductors or cables characterised by their form with arrangements for heat dissipation or conduction
- H01B7/428—Heat conduction
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a temperature measuring cable, which aims to solve the problems that the installation depth and the installation position are difficult to determine and the whole bin body is difficult to comprehensively and multi-point monitor in the prior art, and comprises N sections of plastic pipes, N metal connecting protective sleeves, 2 steel wires, three wires, a pointed metal protective sleeve and N temperature sensors; wherein: n is more than or equal to 5 and less than or equal to 30; the N-section plastic pipe and the N metal connection protective sleeves are alternately sleeved in an end-to-end mode, wherein adhesion is adopted between the plastic pipe and the metal connection protective sleeves, N temperature sensors are installed in temperature sensor installation through holes of the N metal connection protective sleeves, three wires are installed in wire installation through holes of the N metal connection protective sleeves and the N-section plastic pipe, the N temperature sensors are connected with the three wires in parallel, 2 wires are installed in the N-section plastic pipe and the N metal connection protective sleeves, and the pointed metal protective sleeve is installed on the right end shaft of the first metal connection protective sleeve.
Description
Technical Field
The invention relates to a temperature measuring cable, in particular to a temperature measuring cable for measuring the temperature of grains and coal in a granary and a coal granary.
Background
It is well known that the temperature environment is critical for the storage of grains and coal, which directly determines the quality conditions of grains and coal. The quality of the grain bin and the coal bin can be guaranteed in a proper and stable temperature environment, so that the temperature is an important monitoring item of the grain bin and the coal bin. Most of the current temperature measurement technologies are to directly put a temperature sensor into a grain and coal pile, and upload temperature signals acquired by the sensor to a computer so as to facilitate monitoring of the temperature environment of the grain bin and the coal bin. However, because the volumes of the granary and the coal bunker are too large, the temperature difference of different areas and different depth points is large, and the temperature condition of the whole granary body cannot be completely reflected by manually monitoring the temperature of a few points by using a temperature sensor. Therefore, in order to realize the overall temperature monitoring of the whole bin body, temperature sensors are required to be installed in different areas and different depths for temperature measurement. If the common temperature sensor is used for measurement, the device is not only difficult to install and damage, but also difficult to determine the installation depth and the installation position, and the whole bin body is difficult to comprehensively and multi-point monitor.
Disclosure of Invention
The invention aims to solve the technical problems that the installation depth and the installation position are difficult to determine and the whole bin body is difficult to comprehensively and multi-point monitor in the prior art, and provides a temperature measuring cable.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: the temperature measuring cable comprises N sections of plastic pipes with the same structure, N metal connecting protective sleeves with the same structure, 2 steel wires with the same structure, three wires with insulating covers, a pointed metal protective sleeve and N temperature sensors with the same structure; wherein: n is 20 or more and 100 or less.
The plastic pipes with the same N sections of structures are alternately connected with the metal connecting protective sleeves with the same N sections of structures in a sleeved mode in an end-to-end mode, contact parts between the plastic pipes with the same N sections of structures and the metal connecting protective sleeves with the same N structures are fixed through gluing, the temperature sensors with the same N structures are installed in the temperature sensor installation through holes on the metal connecting protective sleeves with the same N structures, three wires with insulating covers are installed in the wire installation through holes on the metal connecting protective sleeves with the same N structures and the plastic pipes with the same N sections of structures, the temperature sensors with the same N structures are connected in parallel on the three wires with the insulating covers, 2 steel wires with the same structures are installed in the steel wire installation through holes with the same N sections of plastic pipes with the same N structures, the tip metal protective sleeves are sleeved on the right end shaft of the first metal connecting protective sleeve, and transition fit is adopted between the first metal connecting protective sleeve and the tip metal protective sleeve.
The metal connecting protective sleeve in the technical scheme is a three-section stepped shaft structural member consisting of a left end shaft, a middle section shaft and a right section shaft, the structural dimensions of the left end shaft and the right section shaft are completely the same, and the diameter and the axial length of the middle section shaft are larger than those of the left end shaft or the right section shaft; the metal connecting protection sleeve is uniformly provided with 4 steel wire installation through holes with the same structure and circular cross sections along the axial direction, the central connecting line of the 4 steel wire installation through holes with the same structure is square, the right side in the middle of the central connecting line of the steel wire through holes with the same structure on the right side is provided with a wire installation through hole with the circular cross section, the left side in the middle of the central connecting line of the steel wire through holes with the same structure on the left side is provided with a temperature sensor installation through hole with the circular cross section, the temperature sensor through holes are parallel to the rotation axis of the wire installation through holes and are symmetrically arranged relative to the rotation axis of the metal connecting protection sleeve, the diameter of the temperature sensor installation through hole is larger than that of the wire installation through hole, and the temperature sensor is marked on each metal connecting protection sleeve by laser.
The tip metal protection sleeve in the technical scheme comprises a cone and a ring body, the diameter of the bottom end of the cone is equal to the outer diameter of the ring body, the diameter of the right end shaft in the protection sleeve is equal to the diameter of the right end shaft in the metal connection protection sleeve, the bottom end of the cone is connected with one end of the ring body into a whole, the cone is collinear with the rotation axis of the ring body, and the cone angle of the cone of the tip metal protection sleeve is set to 120 degrees.
The diameter of the plastic pipe is fixed, the inner diameter of the plastic pipe is the same as the diameter of the left end shaft or the right end shaft of the metal connecting protective sleeve, the outer diameter of the plastic pipe is the same as the diameter of the middle section shaft of the metal connecting protective sleeve, and the axial dimension of the plastic pipe is selected to be 0.5 meter to 1 meter.
According to the technical scheme, the fact that N temperature sensors with the same structure are arranged in the temperature sensor installation through holes on the N metal connection protection sleeves with the same structure means that the temperature sensors with the model DS18B20 are arranged in steel pipes, the steel pipes are filled and sealed by colloid fillers, the filled steel pipes are arranged in the temperature sensor installation through holes on the metal connection protection sleeves, the steel pipes are connected with the temperature sensor installation through holes in a transition fit mode, and each metal connection protection sleeve is provided with one filled steel pipe.
In the technical scheme, the fact that 2 steel wires with the same structure are arranged in 4 steel wire installation through holes with the same structure on N sections of plastic pipes with the same structure and N metal connection protective sleeves is that the two steel wires with the same structure are inserted into 4 steel wire through holes with the same structure on the N metal connection protective sleeves, and the two steel wire through holes on the same side of the N metal connection protective sleeves with the same structure share one steel wire; one end of the first steel wire is inserted into a left hole of one steel wire through hole on the first metal connecting protective sleeve to extend out of a right hole, then is inserted into a right hole of the other steel wire through hole on the same side as the steel wire through hole to extend out of the left hole, and the two ends of the steel wire are aligned on the left side of the 2 steel wire through holes; the other steel wire and the other two steel wire through holes are installed in the same connection mode, then 4 ends of the 2 steel wires are aligned at the left side of the 4 steel wire through holes, then a first section of plastic pipe is sleeved on the two steel wires with the same structure, the right end of the first section of plastic pipe is sleeved on the left end shaft of the first metal connection protection sleeve, then a second metal connection protection sleeve is sleeved on the two steel wires with the same structure, the right end shaft of the second metal connection protection sleeve is inserted into the left end of the first section of plastic pipe, the second section of plastic pipe is sleeved on the left end shaft of the two steel wires with the same structure, the right end of the second section of plastic pipe is sleeved on the left end shaft of the second metal connection protection sleeve, the third metal connection protection sleeve and the third section of plastic pipe, the fourth metal connection protection sleeve and the fourth section of plastic pipe are sleeved on the left end shaft of the N-1 section of plastic pipe in sequence until the N section of plastic pipe is sleeved on the two steel wires with the same structure in the same mode, the right end shaft of the N section of metal connection protection sleeve with the N section of plastic pipe is inserted into the left end shaft of the first section of plastic pipe with the same structure, and the required length of the N section of the plastic pipe is sleeved on the right end of the right section of the cable; the whole temperature measuring cable is installed in sequence from right to left, and N metal connecting protective sleeves with the same structure are connected with N plastic pipes with the same structure in series by adopting two steel wires with the same structure.
The technical scheme is that the parallel connection of the N temperature sensors with the same structure on three leads with insulating covers means that: the temperature sensor with the model DS18B20 is provided with a pin VDD, a pin GND and a single data bus pin DQ, 3 pins of each temperature sensor are respectively connected with corresponding wires in three wires with insulating covers, and the resolution of the temperature sensor 11 with the model DS18B20 can reach +/-0.5 ℃.
Compared with the prior art, the invention has the beneficial effects that:
1. the temperature measuring cable can measure the temperatures of a plurality of positions at the same time, the spatial positioning of the measured points is clear, the temperature measurement can be carried out on the same point for a plurality of times, the result comparison is convenient, the temperature change in the warehouse at different room temperatures and different humidities is obtained, and the storage work of the warehouse can be better carried out;
2. According to the temperature measuring cable disclosed by the invention, the structure that the metal wire and the plastic pipe are used simultaneously is adopted, so that the strength of the external structure of the temperature measuring cable is increased, and the application range of the temperature measuring cable is widened;
3. According to the temperature measuring cable disclosed by the invention, the used temperature sensor is wrapped by the metal connecting protective sleeve, so that the temperature sensor is prevented from being damaged and disturbed in use, and the accuracy and the service life of the temperature measuring cable are improved;
4. The temperature measuring cable adopts the temperature sensor with the model DS18B20, the resolution ratio can reach +/-0.5 ℃, and the sensitivity and the precision of the temperature measuring cable are improved;
5. the temperature sensor with the model DS18B20 is used as the temperature measuring cable, and the position of a measuring point corresponding to the obtained data can be well distinguished through the special internal ID;
6. the metal connection protective sleeve adopted by the temperature measurement cable has the advantages of simple structure, good heat conductivity, more sensitivity to temperature change sensing, and simplified whole structure, and meanwhile, the metal connection protective sleeve is used for bearing a plurality of functional tasks;
7. according to the temperature measuring cable disclosed by the invention, each sensor is connected to three buses in parallel at the same time, so that the aim of uniformly managing the temperature sensors can be fulfilled.
8. According to the open type design adopted by the head of the temperature measuring cable, a user can be externally connected with different data processors according to the actual situation of the user, so that the design is more humanized.
9. The temperature measuring cable disclosed by the invention is simple in structure, common in material, low in use and manufacturing cost, low in subsequent maintenance cost and good in economical efficiency.
10. The metal protective sleeve at the tail of the temperature measuring cable structure is in a pointed shape, so that the cable can conveniently penetrate into the bottom of the bin body to be measured in use.
11. The temperature measuring cable has good corrosion resistance, water resistance, oil resistance, good flexibility, long service life and measurement accuracy, and can work in severe environments.
The invention is further described below with reference to the accompanying drawings:
FIG. 1 is a schematic diagram of a temperature measurement cable structure according to the present invention;
FIG. 2 is a front view of a metal connection protective sleeve structure used in a temperature measurement cable according to the present invention;
FIG. 3 is a left side view of a metal connection protective sleeve structure used in a temperature measurement cable according to the present invention;
FIG. 4 is a left side view of a metal connection protective sleeve structure used in a temperature measurement cable according to the present invention;
FIG. 5 is a right side view of a metal connection protective sleeve structure used in a temperature measurement cable according to the present invention;
fig. 6 is a schematic structural diagram of a temperature sensor used in the temperature measurement cable according to the present invention.
In the figure, a plastic pipe 1, a metal connecting protective sleeve 2, a steel wire 3, a wire 4, a pointed metal protective sleeve 5, a temperature sensor mark 6, a temperature sensor mounting through hole 7, a steel wire mounting through hole 8, a wire mounting through hole 9, a wire mounting through hole 10, a gelatinous filler 11, a temperature sensor and a steel pipe 12.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
Referring to fig. 1, the temperature measuring cable of the invention comprises N plastic pipes 1 with the same structure, N metal connecting protective sleeves 2,2 steel wires 3, three wires 4 and a temperature sensor 11, wherein the plastic pipes 1 have the same structure, the metal connecting protective sleeves 2 and 2 steel wires 3 have the same structure, the three wires 4 are provided with insulating covers, and the tip metal protective sleeves 5 have the same structure as the N temperature sensors; wherein: the distance between every two temperature sensors 11 in the same temperature measuring cable, namely the length of each plastic pipe 1 is the same, and the length range is 0.5 m to 1 m. The heights of the existing coal bin and grain bin are set according to the requirements of users, and the height range is 10 meters to 50 meters. Therefore, in one temperature measuring cable, the number of N is the height of the bin body/the length of the plastic pipe, and the number of N ranges from 20 to 100. The specific number N can be selected according to the practical situation of use through the number relation between the height of the bin body and the length of the plastic pipe.
Referring to fig. 1, the metal connection protection sleeve 2 is a three-section stepped shaft structural member, the left end shaft, the middle section shaft and the right section shaft are coaxial, the structural dimensions of the left end shaft and the right section shaft are identical, and the diameter and the axial length of the middle section shaft are larger than those of the left end shaft and the right section shaft.
Referring to fig. 2 and 3,4 steel wire installation through holes 8 with the same structure and circular cross section are uniformly arranged on the metal connection protective sleeve 2 along the axial direction, the central connecting line of the 4 steel wire through holes 8 with the same structure is square, the right side in the middle of the central connecting line of the right side 2 steel wire through holes 8 with the same structure is provided with a wire through hole 9 with the circular cross section, the left side in the middle of the central connecting line of the left side 2 steel wire through holes 8 with the same structure is provided with a temperature sensor installation through hole 7 with the circular cross section, and the diameter of the temperature sensor installation through hole 7 is larger than that of the wire through hole 9.
Two steel wires 3 with the same structure are inserted into 4 steel wire through holes 8 with the same structure on N metal connecting protective sleeves 2, and the two steel wire through holes 8 on the same side of the metal connecting protective sleeves 2 with the same structure share one steel wire 3. One end of the first steel wire 3 starts to be inserted into and extend out from the left orifice of one steel wire through hole 8 on the first metal connecting protective sleeve 2 of the head part of the temperature measuring cable, then is inserted into and extend out from the left orifice of the other steel wire through hole 8 on the same side as the steel wire through hole 8, and the two ends of the steel wire 3 (2 sections of steel wires) are aligned on the left side of the 2 steel wire through holes 8; the other steel wire 3 and the other two steel wire through holes 8 are installed in the same connection mode, 4 ends of the 2 steel wires 3 (4 sections of steel wires) are aligned on the left side of the 4 steel wire through holes 8, then a first section of plastic pipe 1 is sleeved on the two steel wires 3 (4 sections of steel wires) with the same structure, the right end of the first section of plastic pipe 1 is sleeved on the left end shaft of the first section of metal connection protection sleeve 2, then a second metal connection protection sleeve 2 is sleeved on the two steel wires 3 with the same structure, the right end shaft of the second metal connection protection sleeve 2 is inserted into the left end of the first section of plastic pipe 1, the second section of plastic pipe 1 is sleeved on the left end shaft of the second section of metal connection protection sleeve 2, the third section of metal connection protection sleeve 2 and the third section of plastic pipe 1, the fourth section of metal connection protection sleeve 2 and the fourth section of plastic pipe 1, … … until the N section of metal connection protection sleeve 2 with the N section of plastic pipe 1 is sleeved on the left end of the two steel wires 3 with the same structure, the second section of plastic pipe 1 is sleeved on the right end shaft of the second section of metal connection protection sleeve 1 is sleeved on the N section of plastic pipe 1, and the length of the N section of the second section of plastic pipe is required to be inserted into the N section of the second section of plastic pipe 1 with the right end of steel wire 1 with the same structure, and the N section of the second section of metal connection protection sleeve is inserted into the N section of the second section of plastic pipe with the second section of steel cable with the same structure, and the N section of the second section of metal connection protection pipe is connected with the N pipe with the same steel cable with the N pipe with the same structure; the whole temperature measuring cable is installed in sequence from bottom (right) to top (left), N metal connecting protective sleeves 2 with the same structure and N plastic pipes 1 with the same structure are alternately arranged, and two steel wires 3 with the same structure connect N metal connecting protective sleeves 2 with the same structure and N plastic pipes 1 with the same structure in series. The mode of adopting two steel wires 3 with the same structure to connect in series can improve the strength and toughness of the whole temperature measuring cable, reduce the use of metal and greatly reduce the weight of the temperature measuring cable.
The metal connecting protective sleeve 2 adopts a stepped shaft type structure with wide middle and narrow two sides, so as to facilitate the smooth sleeving of the plastic pipe 1, provide a certain guiding and positioning function for the plastic pipe 1, and ensure the linear structural form of the whole cable.
The radial dimension of the plastic pipe 1 is fixed, the radial dimension of the inner diameter of the plastic pipe 1 and the radial dimension of the left end shaft and the right end shaft of the metal connection protective sleeve 2 are the same, and the radial dimension of the outer diameter of the plastic pipe 1 and the radial dimension of the middle section shaft of the metal connection protective sleeve 2 are the same. The actual axial dimension of the plastic pipe 1 is determined by the interval distance of monitoring points in the actual working of the temperature measuring cable, and the selection range is 0.5 meter to 1 meter.
After the plastic pipe 1 with the same N sections and the metal connecting protective sleeves 2 with the same N sections are alternately sleeved end to end, the contact part between the plastic pipe 1 and the metal connecting protective sleeves 2 is fixed by gluing so as to ensure the strength of the temperature measuring cable. In addition, in order to facilitate maintenance and use of the sensor, a temperature sensor mark 6 is marked on each metal connection protective sleeve 2 by laser. The wire through hole 9 (shown in fig. 5) arranged on the metal connection protective sleeve 2 has positioning and protecting effects on the wire 4 inserted therein, so that the external structure of the temperature measuring cable is simple and clear, and the wiring safety of the temperature sensor is ensured.
The special emphasis is to be placed in the temperature measurement cable structure, 1 pointed metal protection sleeve 5 is installed at the head of the temperature measurement cable, namely at one (right) end of the first metal connection protection sleeve 2, the pointed metal protection sleeve 5 is composed of a cone and a ring body, the diameter of the bottom end of the cone is equal to the outer diameter of the ring body, the inner diameter of the ring body is equal to the diameter of the right end shaft in the metal connection protection sleeve 2, the bottom end of the cone is connected with one end of the ring body into a whole, the cone is collinear with the rotation axis of the ring body, the cone-shaped pointed tip can assist the temperature measurement cable to be inserted into a coal bunker or a grain bunker with larger depth in use, in order to ensure the strength of the pointed metal protection sleeve 5, the pointed safety cone angle is 120 DEG, and the first metal connection protection sleeve 2 and the pointed metal protection sleeve 5 adopt transition fit, so that the precision is convenient to detach.
Referring to fig. 4 and 6, the temperature sensor through hole 7 provided in the metal connection protective sheath 2 is located opposite to the wire through hole 9, and the temperature sensor through hole 7 is parallel to the rotation axis of the wire through hole 9 and symmetrically provided with respect to the rotation axis of the metal connection protective sheath 2. During the use process of the temperature measuring cable, the temperature sensor 11 with the model DS18B20 is firstly arranged in the steel pipe 12, and is filled and sealed by the gel filler 10 to protect the temperature sensor 11. And then the poured steel pipe 12 is arranged in the temperature sensor through hole 7, transition fit is adopted between the steel pipe 12 and the temperature sensor through hole 7, and each metal connecting protective sleeve 2 is provided with one poured steel pipe 12, so that the temperature sensors 11 are uniformly distributed along the axial direction of the cable, and the interval distance is the same.
The temperature sensors 11 with the model number DS18B20 are provided with a pin VDD (power supply voltage), a pin GND (voltage ground) and a pin DQ (single data bus), and 3 pins of each temperature sensor 11 are respectively connected with corresponding connecting wires in the lead wires 4, so that the temperature sensors 11 are convenient to control and use. The resolution of the temperature sensor 11 with the model DS18B20 can reach +/-0.5 ℃, the accuracy and sensitivity of the whole temperature measuring cable can be improved by using the temperature sensor 11 with the model DS18B20, and the internal ID numbers of the temperature sensor 11 with the model DS18B20 corresponding to different points which are physically measured can be distinguished in use.
The temperature measuring cable designed by the invention is simple in material and structure, convenient for mass production and widely applied, a user can determine the number, the spacing distance and the total length of the temperature measuring cable of the temperature sensor 11 according to the actual situation and the use requirement of the user, and a corresponding plug or a power-on device is arranged to enable the temperature sensor 11 to be connected with a power supply and a monitoring point, and the output end of the head of the temperature measuring cable is externally connected with different data processing devices according to the use requirement.
Claims (6)
1. A temperature measurement cable is characterized by comprising N plastic pipes (1) with the same structure, N metal connection protection sleeves (2) with the same structure, 2 steel wires (3) with the same structure, three wires (4) with insulating covers, and a temperature sensor (11) with the same structure, wherein the temperature measurement cable comprises a pointed metal protection sleeve (5) and N temperature sensors (11), wherein the temperature sensors are formed by the same structure: n is more than or equal to 20 and less than or equal to 100;
The method comprises the steps that N sections of plastic pipes (1) with the same structure are alternately sleeved and connected with N sections of metal connecting protective sleeves (2) with the same structure in an end-to-end mode, contact parts between the N sections of plastic pipes (1) with the same structure and the N sections of metal connecting protective sleeves (2) with the same structure are fixed through gluing, N sections of temperature sensors (11) with the same structure are arranged in temperature sensor mounting through holes (7) on the N sections of metal connecting protective sleeves (2), three wires (4) with insulating covers are arranged in wire mounting through holes (9) on the N sections of metal connecting protective sleeves (2) with the same structure and the N sections of plastic pipes (1) with the same structure, N sections of temperature sensors (11) with the same structure are connected in parallel to three wires (4) with insulating covers, 2 steel wires (3) with the same structure are arranged in 4 steel wire mounting through holes (8) on the N sections of metal connecting protective sleeves (2) with the same structure, the metal protective sleeves (5) are matched with one another on the right end of a first metal connecting protective sleeve (2), and the first metal protective sleeve (2) is connected with one end of a transition metal protective sleeve (5);
the steel wires (3) with the same structure are arranged in 4 steel wire installation through holes (8) with the same structure on the plastic pipe (1) with the same structure of N sections and the metal connection protective sleeve (2) with the same structure of N sections, and the steel wire installation through holes are as follows:
The two steel wires (3) with the same structure are inserted into 4 steel wire through holes (8) with the same structure on N metal connecting protective sleeves (2), and the two steel wire through holes (8) on the same side of the N metal connecting protective sleeves (2) with the same structure share one steel wire (3); one end of the first steel wire (3) is inserted into the left hole of one steel wire through hole (8) on the first metal connecting protective sleeve (2) to extend out of the right hole, then the right hole of the other steel wire through hole (8) on the same side with the steel wire through hole (8) is inserted into the left hole to extend out, and the two ends of the steel wire (3) are aligned on the left side of the 2 steel wire through holes (8); the other steel wire (3) and the other two steel wire through holes (8) are installed in the same connection mode, the 4 ends of the 2 steel wires (3) are aligned on the left side of the 4 steel wire through holes (8), then the first section of plastic pipe (1) is sleeved on the two steel wires (3) with the same structure, the right end of the first section of plastic pipe (1) is sleeved on the left end shaft of the first section of metal connection protection sleeve (2), the second metal connection protection sleeve (2) is sleeved on the two steel wires (3) with the same structure, the right end shaft of the second metal connection protection sleeve (2) is inserted into the left end of the first section of plastic pipe (1), the second section of plastic pipe (1) is sleeved on the left end shaft of the two steel wires (3) with the same structure, the right end of the second section of plastic pipe (1) is sleeved on the left end shaft of the second section of metal connection protection sleeve (2), the third section of metal connection protection sleeve (2) and the third section of plastic pipe (1) and the fourth section of metal connection protection sleeve (2) are sleeved on the left end shaft of the second section of plastic pipe (1) until the same structure of the second section of plastic pipe (1) is inserted into the second section of plastic pipe (1) with the same structure, the right end of the Nth section plastic pipe (1) is sleeved on the left end shaft of the Nth metal connecting protective sleeve (2) and is connected with a cable with a required length; the whole temperature measuring cable is installed in sequence from right to left, and N metal connecting protective sleeves (2) with the same structure are connected with N plastic pipes (1) with the same structure in series by adopting two steel wires (3) with the same structure.
2. The temperature measurement cable according to claim 1, wherein the metal connection protective sleeve (2) is a three-section stepped shaft structural member consisting of a left end shaft, a middle section shaft and a right section shaft, the structural dimensions of the left end shaft and the right section shaft are identical, and the diameter and the axial length of the middle section shaft are larger than those of the left end shaft or the right section shaft; the metal connecting protection sleeve (2) is uniformly provided with 4 steel wire installation through holes (8) with the same structure and circular cross section along the axial direction, the central connecting line of the 4 steel wire installation through holes (8) with the same structure is square, the right side in the middle of the central connecting line of the right side 2 steel wire through holes (8) with the same structure is provided with a wire installation through hole (9) with the circular cross section, the left side in the middle of the central connecting line of the left side 2 steel wire through holes (8) with the same structure is provided with a temperature sensor installation through hole (7) with the circular cross section, the temperature sensor through holes (7) are parallel to the rotation axis of the wire installation through holes (9), the diameter of the temperature sensor installation through holes (7) is larger than the diameter of the wire installation through holes (9), and the temperature sensor mark (6) is marked on each metal connecting protection sleeve (2) by laser.
3. A thermometric cable according to claim 1, characterized in that the tip metal protecting sleeve (5) consists of a cone and a torus, the diameter of the bottom end of the cone is equal to the outer diameter of the torus, the inner diameter of the torus is equal to the diameter of the right end shaft in the metal connecting protecting sleeve (2), the bottom end of the cone is connected with one end of the torus into a whole, the cone is collinear with the rotation axis of the torus, and the cone angle of the cone of the tip metal protecting sleeve (5) is set to 120 °.
4. A thermometric cable according to claim 1, characterized in that the radial dimension of the plastic tube (1) is fixed, the diameter of the plastic tube (1) is the same as the diameter of the left end shaft or the right end shaft of the metal connection protecting sleeve (2), the outer diameter of the plastic tube (1) is the same as the diameter of the middle section shaft of the metal connection protecting sleeve (2), and the axial dimension of the plastic tube (1) is selected in the range of 0.5m to 1 m.
5. A temperature measurement cable according to claim 1, wherein the N temperature sensors (11) with the same structure are mounted in the temperature sensor mounting through holes (7) of the N metal connection protective sleeves (2) with the same structure:
The temperature sensor (11) with the model DS18B20 is arranged in the steel pipe (12), the steel pipe (12) after pouring is poured and sealed by the colloid filler (10), then the steel pipe (12) after pouring is arranged in the temperature sensor through hole (7) on the metal connecting protective sleeve (2), the steel pipe (12) is connected with the temperature sensor through hole (7) in a transition fit mode, and each metal connecting protective sleeve (2) is provided with one steel pipe (12) after pouring.
6. A temperature measuring cable according to claim 1, wherein said N temperature sensors (11) of identical structure are connected in parallel on three wires (4) with insulating sheath:
The temperature sensor (11) with the model DS18B20 is provided with a pin VDD, a pin GND and a single data bus pin DQ, 3 pins of each temperature sensor (11) are respectively connected with corresponding wires in three wires (4) with insulating covers, and the resolution of the temperature sensor 11 with the model DS18B20 can reach +/-0.5 ℃.
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| CN109253824B (en) * | 2018-09-03 | 2020-09-18 | 徐州中矿奥特麦科技有限公司 | Closed storage silo temperature measuring device |
| CN110279959B (en) * | 2019-05-15 | 2020-11-27 | 太原理工大学 | Fire extinguishing method for spontaneous combustion of coal gangue dump |
| CN111081428A (en) * | 2019-12-26 | 2020-04-28 | 重庆伦晗电子有限公司 | Manufacturing process of ground temperature detection cable |
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