WO2019200821A1 - 一种用于煤炭自燃温度探测的随钻测温装置 - Google Patents

一种用于煤炭自燃温度探测的随钻测温装置 Download PDF

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Publication number
WO2019200821A1
WO2019200821A1 PCT/CN2018/104642 CN2018104642W WO2019200821A1 WO 2019200821 A1 WO2019200821 A1 WO 2019200821A1 CN 2018104642 W CN2018104642 W CN 2018104642W WO 2019200821 A1 WO2019200821 A1 WO 2019200821A1
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temperature
signal
conductive
cavity
signal line
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PCT/CN2018/104642
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English (en)
French (fr)
Inventor
任万兴
郭庆
石晶泰
赵乾坤
王士华
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中国矿业大学
徐州吉安矿业科技有限公司
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Application filed by 中国矿业大学, 徐州吉安矿业科技有限公司 filed Critical 中国矿业大学
Publication of WO2019200821A1 publication Critical patent/WO2019200821A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/06—Measuring temperature or pressure
    • E21B47/07—Temperature
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B47/00—Survey of boreholes or wells
    • E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling

Definitions

  • the invention relates to a measurement while drilling temperature detecting device for detecting spontaneous combustion temperature of coal, belonging to a coal spontaneous combustion temperature detecting device.
  • coal spontaneous combustion is one of the disasters affecting the safe recovery of the working face
  • the goaf is the spontaneous combustion area of coal. Since the goaf is in a closed space, it is impossible to measure the temperature of the internal space in real time.
  • the gas detection method is used to invert the degree of spontaneous combustion of the coal in the goaf, and corresponding fire control measures are taken based on the inversion results.
  • this method due to the influence of underground coal flow, mining and geological occurrence, once the iconic gas is detected, the residual coal has entered the stage of spontaneous combustion, which cannot prevent the effect in advance and directly increase the fire. The probability of occurrence increases the investment in fire management.
  • the temperature of the easy-fire location can be monitored in advance, and direct temperature measurement such as optical fiber temperature measurement technology, thermocouple technology, and infrared detection technology can be considered.
  • the light temperature measurement technology preliminarily lays the optical fiber to the goaf or the easy-fire area, and uses the optical time domain reflection technology to measure the temperature of the goaf in real time. Since the optical fiber is generally laid on the coal seam floor, it is affected by the roof collapse of the coal seam and the mine water. This method often has problems such as fiber being cut off, fiber or temperature probe being immersed, etc. In addition, the method needs to be pre-buried, and for an area that is not buried and has been ignited, its internal temperature cannot be measured.
  • thermocouple is used to measure the temperature in the borehole, although the temperature of the ignition space can sometimes be measured, the operation is complicated, and the surrounding rock condition of the borehole and the thermal conductivity of the porous medium in the goaf are poor, and the accuracy is Poor sensitivity.
  • the infrared detection technology is only applicable to the area temperature measurement where the surface temperature changes obviously, and is not suitable for the detection of the temperature of the mined area under the mine or the abandoned roadway area.
  • a temperature-measuring drilling tool for temperature detection of a goaf in a coal mine which is a temperature measuring valve block disposed between a water head and a drill pipe, which comprises a central rotating cavity and signal transmission feedback.
  • the connecting end of the water changing head is inserted into the pipe joint at one end of the central rotating cavity, and the other end of the central rotating cavity is connected with the drill pipe;
  • the signal transmission feedback component is mounted on the central rotating cavity by the positioning sleeve, and the positioning sleeve and the center
  • a conductive ring is arranged in the cavity between the rotary chambers;
  • the signal transmission feedback component includes a signal line I, a signal line II, a signal input end and a signal output end, and the signal line I and the signal line II connect the temperature sensing cable and the signal input.
  • the terminal is connected to the signal output.
  • the invention is convenient to operate, can not only detect the temperature distribution of the area, but also can measure the temperature along the drilling path when the drill pipe is drilled deep, thereby accurately detecting the temperature of the coal mine goaf and other fire area, thereby facilitating advancement. Do a good job of prevention and reduce the probability of fire.
  • the principle of the above-mentioned drilling while drilling temperature drilling tool is: connecting the temperature measuring valve block between the water head of the drilling machine and the drill pipe, and continuously inputting an electric signal to the temperature measuring valve block from the outside through the signal input end during drilling.
  • the signal is transmitted to the signal output terminal via the signal line I, the temperature sensing cable and the signal line II.
  • the temperature sensing cable is short-circuited, and the short-circuit signal can be output to the alarm connected thereto through the signal output terminal.
  • the component issues a warning.
  • Different monitoring points in the same work area and temperature-sensitive cables that change different detection temperatures at the same monitoring point can monitor the temperature of a wide range of working areas.
  • the shortcoming of the existence is: the temperature of the temperature sensing cable is determined. When the temperature reaches the set temperature of the temperature sensing cable, the temperature sensing cable is automatically melted, and the temperature measurement cannot be continued, that is, the temperature is one-time measurement, and the detection result can only be expressed. The measured temperature is greater than the temperature set of the temperature sensing cable, but the exact temperature value cannot be determined. Therefore, continuous temperature measurement cannot be achieved.
  • the present invention provides a logging temperature measuring device for detecting the spontaneous combustion temperature of coal, which can monitor the real-time temperature in the borehole, and the measured temperature is more accurate, stable, rapid and continuous.
  • the Drilling while temperature measuring device comprises a central rotating cavity and a signal transmission module
  • the signal transmission module is installed in the center through the positioning sleeve
  • a pair of slewing bearings are arranged between the central rotating cavity and the positioning sleeve
  • a conductive ring is arranged in the cavity between the positioning sleeve and the central rotating cavity, and the conductive ring is sleeved on the central rotating cavity.
  • the diameter of the inner ring of the conductive ring is larger than the diameter of the outer ring of the central rotating cavity, and the insulating ring and the central rotating cavity are filled with an insulator;
  • the signal transmission module includes a signal line, a signal output end, a communication cable, a display, a signal line, and a temperature sensor.
  • the temperature sensor is installed in the drill bit, the signal receiving and the wireless transmitting device are connected to the temperature sensor through the signal line and installed outside the drill pipe farthest from the drill bit, and the signal output end is connected through the communication cable outward
  • the display the signal output end corresponding to the position of the conductive ring is inserted radially from the outside and passes through the positioning sleeve, and the signal
  • the center of the outlet end is provided with a conductive rod
  • the front end of the conductive rod is provided with a conductive hemisphere, the front end surface of the conductive hemisphere is in contact with the annular outer surface of the conductive ring
  • the signal line is placed in the connected central rotary cavity and the drill pipe, and one end of the signal line passes through
  • the central rotating cavity side wall is fixed to the inner ring of the conductive ring, and the other end is connected to the temperature sensor output end inside the drill bit.
  • a Drilling Temperature Measurement Device for detecting the spontaneous combustion temperature of coal, during the drilling process, transmits the sensor signal to the conductive ring through the signal line through the temperature sensor inside the drill bit, and the conductive ring Real-time temperature monitoring is realized by conductive hemispheres, conductive rods and communication cables to the display; after the drilling is completed, the signal receiving and wireless transmitting device attached to the last stage drill pipe is connected to the signal line to obtain the sensor signal. And the signal is sent to the receiving device in a wireless manner, and the receiving device displays the temperature change; the above measured temperatures are more accurate, stable, rapid and continuous after the spinning process and the end.
  • the invention is a temperature detecting device proposed for the prevention and control of coal spontaneous combustion in coal mines.
  • FIG. 1 is a schematic diagram of an application of an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the structure of a temperature measurement device while drilling according to an embodiment of the present invention.
  • Figure 3 is a schematic view showing the structure of the last stage drill pipe of Figure 2.
  • FIG. 4 is a view showing the mounting structure of the signal wires in the drill pipe of FIG. 2.
  • Figure 5 is a schematic view showing the structure of the fixing sleeve of Figure 4.
  • a measurement while drilling temperature measuring device for detecting the spontaneous combustion temperature of coal the measurement while drilling temperature measuring device 7 is installed between the water supply device and the drill pipe 4 , the water supply device including the water supply device 2 and the high pressure water pipe 3.
  • the high pressure water pipe 3 is connected to the water source at one end and the water supply device 2 at the other end.
  • the drill 1 and the drill pipe 4 are coaxially mounted on the side of the water supply device 2 and the temperature measuring device 7 while drilling, and the drill pipe 4 is connected with a drill bit at the front end thereof. 5.
  • the temperature-measuring device 7 for drilling includes a central rotary cavity 10 and a signal transmission module, and the signal transmission module is mounted on the central rotary cavity 10 through the positioning sleeve 30, and the central rotary cavity
  • a pair of slewing bearings 20 are disposed between the body 10 and the positioning sleeve 30, and a conductive ring 60 is disposed in the cavity between the positioning sleeve 30 and the central rotating cavity 10, and the conductive ring 60 is sleeved on the central rotating cavity 10.
  • the diameter of the inner ring of the conductive ring 60 is larger than the diameter of the outer ring of the central rotating cavity 10, and the insulator 50 is filled between the conductive ring 60 and the central rotating cavity 10.
  • the material of the insulator 50 may be insulated nylon; the signal transmission module
  • the signal line 80, the signal output terminal 70, the communication cable 90, the display 100, the signal line 80, the temperature sensor 110, and the signal receiving and wireless transmitting device 120 are included.
  • the temperature sensor 110 is installed in the drill bit 5, and the temperature sensor 110 is preferably installed throughout.
  • the signal receiving and wireless transmitting device 120 is connected to the temperature sensor 110 via the signal line 80 and installed outside the last stage drill pipe 4-1 farthest from the drill bit 5 (see Fig. 3), signal output end 70 is connected to the display 100 through the communication cable 90.
  • the signal output end 70 is inserted into the positioning sleeve 30 from the outside in the radial direction corresponding to the position of the conductive ring 60, and the signal output end 70 is provided with a conductive rod 71 at the center, and the front end of the conductive rod 71 A conductive hemisphere 73 is disposed, the front end surface of the conductive hemisphere 73 is in contact with the annular outer surface of the conductive ring 60, the signal line 80 is placed in the communicating central rotary cavity 10 and the drill rod 4, and one end of the signal line 80 passes through the central rotary cavity
  • the side wall of the 10 is fixed to the inner circumference of the conductive ring 60, and the other end is connected to the output end of the temperature sensor 110 inside the drill 5.
  • the signal line 80 is supported by the fixing sleeve 6 in the cavity of the drill pipe 4.
  • the outer part of the fixing sleeve 6 is an outer circle 6-3 suitable for the inner diameter of the drill pipe 4, and the fixing sleeve 6 is fixed.
  • the inner center has a ring member 6-1 through which the signal wire 80 passes, and the ring member 6-1 and the outer ring 6-3 are connected by a strut 6-2. It can improve the installation position of the signal line 80, the stability of the working performance, and the long service life.
  • the conductive rod 71 is sleeved with a spring 72, and one end of the spring 72 bears against the conductive hemisphere 73, and the other end is set at the signal output.
  • the signal line 80 the signal line 80 and the insulator 50, the central rotary cavity 10 and the insulator 50 are filled with a resin 40; and at the same time, the signal line 80 is located in the cavity of the drill pipe 4.
  • the outer protective cover 82 can be formed by connecting a plurality of signal lines 80 through the signal line connecting socket 81 according to the length.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Mining & Mineral Resources (AREA)
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Abstract

一种用于煤炭自燃温度探测的随钻测温装置，包括中心回转腔体（10）和信号传输模块，信号传输模块通过定位套（30）安装在中心回转腔体（10）上；信号传输模块包括信号线（80）、信号输出端（70）、通讯电缆（90）、显示器（100）、温度传感器（110）和信号接收及无线发射装置（120），信号输出端（70）中心设有传导杆（71），传导杆（71）前端设有导电半球（73），导电半球（73）与导电环（60）接触，信号线（80）置于连通的中心回转腔体（10）和钻杆（4）中，一端连导电环（60）内圈，另一端与温度传感器（110）连接。

Description

一种用于煤炭自燃温度探测的随钻测温装置 技术领域
本发明涉及一种用于煤炭自燃温度探测的随钻测温装置，属于煤炭自燃温度探测装置。
背景技术
在煤矿井下，煤自燃是影响工作面安全回采的灾害之一，而在其中采空区是煤自燃频发区域。由于采空区处于封闭空间，无法实时测量其内部空间各处温度，目前现场操作时多采用气体探测法反演采空区煤自燃程度，并基于反演结果采取相应的火灾治理措施。但是采用这种方法时，受煤矿井下风流、采动以及地质赋存的影响，一旦检测到标志性气体，则遗煤已经进入到了自燃阶段，不能起到提前预防的效果，直接增大了火灾发生的概率，提高了火灾治理的投入。
为了解决上述问题，可以预先监测易着火位置的温度情况，目前可以考虑采用光纤测温技术、热电偶技术和红外探测技术等直接测温。然而光线测温技术是预先向采空区或者易着火区域铺设光纤，利用光时域反射技术进行采空区温度实时测量，由于光纤一般铺设在煤层底板，受煤层顶板垮塌以及矿井水的影响，该方法经常出现光纤被砸断，光纤或感温探头被浸泡等问题；此外该方法需要预埋，而对于没有预埋且已经着火的区域，无法测量其内部温度。而如果通过在钻孔中伸入热电偶测温，虽然有时能够测量出着火空间的温度，但是其操作复杂，且受钻孔围岩状况及采空区多孔介质导热性差的影响，准确性和敏感性差。最后，红外探测技术仅适用于表层温度变化较明显的区域测温，不适用于矿井下采空区或者废弃巷道区域温度的探测。
已知公开了一种用于煤矿井下采空区温度探测的随钻测温钻具，是在水变头和钻杆之间设置的测温阀块，它包括中心回转腔体和信号传输反馈部件，水变头的连接端***中心回转腔体一端的管接头，中心回转腔体另一端与钻杆连接；信号传输反馈部件通过定位套配合安装在中心回转腔体上，且定位套与中心回转腔体之间的空腔中间隔设有导电环；信号传输反馈部件包括信号线Ⅰ、信号线Ⅱ、信号输入端和信号输出端，信号线Ⅰ、信号线Ⅱ将感温电缆与信号输入端和信号输出端连在一起。本发明操作方便，不仅能够探测区域的温度分布情况，还可以在钻杆深入钻孔时测量钻孔沿程的温度，从而准确地探测煤矿井下采空区及其它着火区域温度，从而有利于提前做好预防工作，降低了火灾发生的概率。
上述随钻测温钻具的原理是：将测温阀块接到钻机水变头和钻杆之间，在打钻期间，从外部通过信号输入端持续向测温阀块输入电信号，电信号经信号线Ⅰ、感温电缆、信号线Ⅱ传至信号输出端，当温度超过感温电缆的设定温度时，感温电缆发生短路，短路信号通过信号输出端可以输出至与其相连的报警部件发出警示。同一工作区域的不同监测点以及在同一监测点更换不同检测温度的感温电缆即可监测大范围工作区域的温度，多个测点可以构成温度网，用以指导采空区等火灾防治。其存在的不足是：感温电缆的温度是确定的，当温度达到感温电缆设定温度后，感温电缆自动熔断，无法继续测温，即属于一次性测温，且探测结果只能表示所测温度大于感温电缆设定温度，但无法确定准确的温度值。因此，无法实现连续测温。
发明内容
为了克服现有技术的不足，本发明提供一种用于煤炭自燃温度探测的随 钻测温装置，能够监测钻孔内的实时温度，所测温度更准确、稳定、迅速和连续。
本发明解决其技术问题采用的技术方案是：安装在供水装置和钻杆之间，所述的随钻测温装置包括中心回转腔体和信号传输模块，信号传输模块通过定位套配合安装在中心回转腔体上，中心回转腔体和定位套之间设有一对回转轴承，且定位套与中心回转腔体之间的空腔中间隔设有导电环，导电环套在中心回转腔体上，且导电环内圈直径大于中心回转腔体外圈直径，导电环与中心回转腔体之间填充绝缘体；所述的信号传输模块包括信号线、信号输出端、通讯电缆、显示器、信号线、温度传感器和信号接收及无线发射装置，温度传感器安装在钻头内，信号接收及无线发射装置通过信号线连接温度传感器并安装在离钻头最远一级钻杆的外部，信号输出端向外通过通讯电缆连接显示器，信号输出端对应导电环的位置从外部沿径向***并穿过定位套，且信号输出端中心设有传导杆，传导杆前端设有导电半球，导电半球前端面与导电环的环形外表面接触，信号线置于连通的中心回转腔体和钻杆中，且信号线一端穿过中心回转腔体侧壁并固定在导电环内圈，另一端与钻头内部的温度传感器输出端连接。
相比现有技术，本发明的一种用于煤炭自燃温度探测的随钻测温装置，在施钻过程中，通过钻头内部的温度传感器，将传感器信号通过信号线传至导电环，导电环通过导电半球、传导杆、通讯电缆输送至显示器，实现了实时温度的监测；施钻结束后，又通过最后一级钻杆外附的信号接收及无线发射装置，与信号线连接，获得传感器信号，并将该信号以无线方式发送至接收设备，接收设备显示温度变化情况；以上在旋钻过程及结束后所测的温度均更 准确、稳定、迅速和连续。本发明是针对煤矿井下煤自燃防治提出的温度探测设备。解决了煤自燃防治的根本问题，即温度定位。一旦准确定位煤自燃危险区域，则能全面掌握煤自燃危险区域的发展、变化等过程，精确指导煤自燃防治，同时，避免了防灭火材料选取的难题。因此，该发明专利具有应用前景极高，潜在经济效益大等优势。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明一个实施例的应用示意图。
图2是本发明一个实施例随钻测温装置的结构示意图。
图3是图2中最后一级钻杆的结构示意图。
图4是图2中钻杆内信号线的安装结构图。
图5是图4中固定套的结构示意图。
图中：1、钻机，2、送水器，3、高压水管，4、钻杆，4-1、最后一级钻杆，5、钻头，6、固定套，6-1、环件，6-2、支杆，6-3、外圆，7、随钻测温装置，10、中心回转腔体，20、回转轴承，30、定位套，40、树脂，50、绝缘体，60、导电环，70、信号输出端，71、传导杆，72、弹簧，73、导电半球，80、信号线，81、信号线连接插口，82、保护套，90、通讯电缆，100、显示器，110、温度传感器，120、信号接收及无线发射装置。
具体实施方式
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基 于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明的保护范围。
如图1所示，一种用于煤炭自燃温度探测的随钻测温装置，随钻测温装置7安装在供水装置和钻杆4之间，所述的供水装置包括送水器2和高压水管3，高压水管3一端连接水源，另一端连送水器2，钻机1和钻杆4同轴并分别安装在送水器2和随钻测温装置7的侧部，钻杆4的前端连接有钻头5。
在图2所示的实施例中，所述的随钻测温装置7包括中心回转腔体10和信号传输模块，信号传输模块通过定位套30配合安装在中心回转腔体10上，中心回转腔体10和定位套30之间设有一对回转轴承20，且定位套30与中心回转腔体10之间的空腔中间隔设有导电环60，导电环60套在中心回转腔体10上，且导电环60的内圈直径大于中心回转腔体10的外圈直径，导电环60与中心回转腔体10之间填充绝缘体50，绝缘体50的材质可选为绝缘尼龙；所述的信号传输模块包括信号线80、信号输出端70、通讯电缆90、显示器100、信号线80、温度传感器110和信号接收及无线发射装置120，温度传感器110安装在钻头5内，温度传感器110最好是贯穿安装在钻头5轴心线上，信号接收及无线发射装置120通过信号线80连接温度传感器110并安装在离钻头5最远的最后一级钻杆4-1的外部(参加图3)，信号输出端70向外通过通讯电缆90连接显示器100，信号输出端70对应导电环60的位置从外部沿径向***并穿过定位套30，且信号输出端70中心设有传导杆71，传导杆71前端设有导电半球73，导电半球73前端面与导电环60的环形外表面接触，信号线80置于连通的中心回转腔体10和钻杆4中，且信号 线80一端穿过中心回转腔体10侧壁并固定在导电环60内圈，另一端与钻头5内部的温度传感器110输出端连接。
如图4和图5所示，所述信号线80通过固定套6支撑于钻杆4中空腔内，固定套6的外部是与钻杆4内径相适的外圆6-3，固定套6内部中心具有信号线80穿过的环件6-1，环件6-1与外圆6-3之间通过支杆6-2连接。可以提高信号线80安装位置、工作性能的稳固以及延长使用寿命。
优选地，为了保证导电半球73与导电环60外圈可以始终稳定接触，延长使用寿命，所述传导杆71上套有弹簧72，且弹簧72一端顶住导电半球73，另一端设在信号输出端70的内壁上。为了更好的保护信号线80，所述信号线80与绝缘体50、中心回转腔体10及绝缘体50之间四周均填充有树脂40；同时，在信号线80位于钻杆4中空腔内的部分外覆保护套82，根据长度的需要，可以将多根信号线80通过信号线连接插口81相接而成。
以上所述，仅是本发明的较佳实施例，并非对本发明做任何形式上的限制，凡是依据本发明的技术实质，对以上实施例所做出任何简单修改和同等变化，均落入本发明的保护范围之内。

Claims (7)

  1. 一种用于煤炭自燃温度探测的随钻测温装置，安装在供水装置和钻杆(4)之间，其特征是：所述的随钻测温装置(7)包括中心回转腔体(10)和信号传输模块，信号传输模块通过定位套(30)配合安装在中心回转腔体(10)上，中心回转腔体(10)和定位套(30)之间设有一对回转轴承(20)，且定位套(30)与中心回转腔体(10)之间的空腔中间隔设有导电环(60)，导电环(60)套在中心回转腔体(10)上，且导电环(60)的内圈直径大于中心回转腔体(10)的外圈直径，导电环(60)与中心回转腔体(10)之间填充绝缘体(50)；
    所述的信号传输模块包括信号线(80)、信号输出端(70)、通讯电缆(90)、显示器(100)、信号线(80)、温度传感器(110)和信号接收及无线发射装置(120)，温度传感器(110)安装在钻头(5)内，信号接收及无线发射装置(120)通过信号线(80)连接温度传感器(110)并安装在离钻头(5)最远的最后一级钻杆(4-1)的外部，信号输出端(70)向外通过通讯电缆(90)连接显示器(100)，信号输出端(70)对应导电环(60)的位置从外部沿径向***并穿过定位套(30)，且信号输出端(70)中心设有传导杆(71)，传导杆(71)前端设有导电半球(73)，导电半球(73)前端面与导电环(60)的环形外表面接触，信号线(80)置于连通的中心回转腔体(10)和钻杆(4)中，且信号线(80)一端穿过中心回转腔体(10)侧壁并固定在导电环(60)内圈，另一端与钻头(5)内部的温度传感器(110)输出端连接。
  2. 根据权利要求1所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述的供水装置包括送水器(2)和高压水管(3)，高压水管(3)一端连接水源，另一端连送水器(2)，钻机(1)和钻杆(4)同轴并分别安 装在送水器(2)和随钻测温装置(7)的侧部。
  3. 根据权利要求1或2所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述的温度传感器(110)贯穿安装在钻头(5)轴心线上。
  4. 根据权利要求1或2所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述信号线(80)与绝缘体(50)、中心回转腔体(10)及绝缘体(50)之间四周均填充有树脂(40)。
  5. 根据权利要求1或2所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述信号线(80)通过固定套(6)支撑于钻杆(4)中空腔内，固定套(6)的外部是与钻杆(4)内径相适的外圆(6-3)，固定套(6)内部中心具有信号线(80)穿过的环件(6-1)，环件(6-1)与外圆(6-3)之间通过支杆(6-2)连接。
  6. 根据权利要求5所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述信号线(80)位于钻杆(4)中空腔内的部分外覆有保护套(82)。
  7. 根据权利要求1或2所述的一种用于煤炭自燃温度探测的随钻测温装置，其特征是：所述的传导杆(71)上还套有弹簧(72)，弹簧(72)一端顶住导电半球(73)，另一端设在信号输出端(70)的内壁上。
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