A concrete temperature measuring device

Abstract

The invention discloses a concrete temperature measuring device, comprising a base, a temperature measuring tube, a mounting part, a connecting piece, a sensor, and a protective sleeve; the sensor is a temperature sensor, comprising a wire; the lower end of the temperature measuring tube is detachably connected to the base, and a mounting hole is provided on the temperature measuring tube; the mounting part comprises a mounting tube, a mounting opening is provided on the tube wall of the mounting tube along the axial direction of the mounting tube, the lower end of the mounting tube is connected to a support seat, and a support rod is provided on the support seat; the angle between the support rod and the mounting tube is about 30°, and a sensor is detachably fixed on the connecting piece; when the sensor is fixed on the mounting part through the connecting piece, the outer diameter of the orthographic projection of the sensor and the mounting part is smaller than the inner diameter of the temperature measuring tube; when the sensor is installed in the mounting hole, a protective sleeve is sleeved on the sensor outside the temperature measuring tube, and a low-melting-point plastic gasket is provided between the protective sleeve and the mounting hole. The equipment of the invention can be recycled, is convenient to fix, and temperature detection points at different positions can be set, thereby reducing equipment consumption.

Description

Technical Field

[0001] The invention belongs to the field of civil engineering construction and relates to a concrete temperature measuring device. Background Art

[0002] According to the "Code for Construction of Mass Concrete (GB50496-2009)", "Standard for Construction of Mass Concrete (GB 50496-2018)" and "Technical Specification for Temperature Measurement and Control of Mass Concrete (GB / T 51028-2015)", temperature measurement must be carried out for mass concrete construction, and temperature control and necessary maintenance should be carried out based on temperature measurement. According to the specification, each cast block should select a symmetrical semi-axis for testing, and there should be no less than 4 detection points on each test axis, and 3-5 measurement points are generally arranged at each point. Therefore, the number of temperature measurement points for a single mass concrete construction project ranges from dozens to hundreds. Usually, the sensor is first tied to the steel bar, and then the steel bar is tied to the steel mesh. This method not only has low efficiency in the construction of the temperature measurement point, but also consumes a lot of equipment.

[0003] The main patents of existing concrete temperature measuring devices are as follows: The patent "A method for measuring and cooling large-volume concrete (CN 107460878 A)" uses a thermometer to measure the temperature in a steel temperature measuring tube to achieve temperature measurement. Because each measuring point requires a temperature measuring tube, and the temperature measuring tube needs to be welded, and the thermometer is not in direct contact with the concrete, manual reading is required, and more equipment is actually required, and the temperature measurement efficiency is difficult to improve. The patent "Large-volume concrete temperature measuring tube row (CN 207007375 U)" mainly realizes the fixing of multiple temperature measuring tubes, which is convenient for binding and improves the efficiency of temperature measuring tube construction. However, the temperature measurement method is the same as the previous patent, and the required equipment consumption is large, and the temperature measurement work requires more working hours. The patent "A fixed embedded concrete temperature measuring device (CN 209247205 U)" mainly solves the problem of cumbersome installation of the temperature measuring device. Its composition includes a metal embedded temperature measuring tube, two annular plates and rubber pads, insulation columns, etc. Since the equipment cannot be recycled, although the construction efficiency is improved, the equipment cost is increased. The patent "A new type of pre-buried concrete temperature measuring tube and installation method (CN107525594A)" solves the inconvenience of burying three temperature measuring tubes at different measuring positions together with pipe clamps, tees and steel bars. At the same time, through locking and fixing and wrapping with foam rods, independent temperature measurement is achieved, which can improve the temperature measurement accuracy. This patent still cannot achieve equipment recycling.

[0004] In summary, the shortcomings of the existing technology are mainly: 1) the equipment consumption is large, and recycling is not considered, or the equipment recycling rate is very low. 2) The temperature measurement method of thermometer reading is not efficient. If a non-contact temperature measurement method is used, there is still a temperature measurement lag and it is difficult to improve the accuracy. Summary of the invention

[0005] The purpose of the present invention is to provide a concrete temperature measuring device that can be recycled and easily fixed, and can set temperature detection points at different positions, thereby reducing equipment consumption. The technical solution adopted by the present invention is as follows:

[0006] A concrete temperature measuring device, characterized in that it comprises a base, a temperature measuring tube, a mounting portion, a connecting piece, a sensor, and a protective sleeve; the sensor is a temperature sensor, including a wire;

[0007] The lower end of the temperature measuring tube is detachably connected to the base, and a mounting hole is provided on the temperature measuring tube, in which the sensor is installed;

[0008] The mounting portion includes a mounting tube, a mounting opening is provided on the tube wall of the mounting tube along the axial direction of the mounting tube, the length of the mounting opening is consistent with the length of the mounting tube, the lower end of the mounting tube is connected to a support seat, a support rod is provided on the support seat, and a card slot is provided at one end of the support rod away from the support seat for supporting and fixing the sensor; the angle between the support rod and the mounting tube is 25° to 35°, the sensor is detachably fixed on the connecting piece, and a pull rope is also fixed on the connecting piece; when the sensor is supported by the support rod, the sensor is detachably fixed on the connecting piece, the pull rope and the wire both extend out of the upper end of the mounting tube, and the pull rope and the wire pass through the mounting opening and are clamped into the mounting tube;

[0009] When the sensor is fixed on the mounting part through the connecting piece, the outer diameter of the orthographic projection of the sensor and the mounting part is smaller than the inner diameter of the temperature measuring tube. Such a design enables the mounting part with the sensor mounted thereon to move axially in the temperature measuring tube.

[0010] When the sensor is installed in the mounting hole, the pull rope and the wire both extend out of the upper end of the temperature measuring tube, and the temperature measuring probe of the sensor passes through the mounting hole to the outside of the temperature measuring tube. A protective sleeve is sleeved on the sensor outside the temperature measuring tube, and the upper end of the protective sleeve is located at the mounting hole or extends through the mounting hole to the temperature measuring tube. A low-melting-point plastic gasket is provided between the protective sleeve and the mounting hole.

[0011] Furthermore, the support seat includes a support tube, a groove is opened on the tube wall of the support tube, the length of the groove is consistent with the length of the support tube, the upper end of the support tube is sleeved on the lower end of the outer surface of the mounting tube, the lower end of the support tube is connected to a connecting plate, the support rod is arranged on the connecting plate, and when the support tube is sleeved on the outer surface of the mounting tube, the groove is opposite to the mounting opening.

[0012] Furthermore, the lower end of the temperature measuring tube is threadedly connected to the base through a stabilizing sleeve, and the lowest mounting hole is at least 5 cm away from the base.

[0013] Furthermore, there are multiple temperature measuring tubes, and each temperature measuring tube can be threadedly connected.

[0014] Furthermore, the connecting piece is a throat hoop, on which a hoop ring and a pull ring are provided, the sensor is detachably fixed in the hoop ring, the pull rope is fixed on the pull ring, and the pull ring is preferably a circular ring.

[0015] Furthermore, the protection sleeve is an oil-paper sleeve or a steel sleeve. If the protection sleeve is a steel sleeve, lubricating oil is coated between the protection sleeve and the sensor.

[0016] Further, the base is truncated cone or conical; if it is truncated cone, the temperature measuring tube is connected to the small end of the base, and if it is conical, the temperature measuring tube is connected to the large end of the base;

[0017] Furthermore, a fixing ring is provided at the upper end of the temperature measuring tube for fixing the pull rope.

[0018] Furthermore, the sensor is an electric resistance temperature sensor or a thermocouple sensor.

[0019] Furthermore, the melting point of the low-melting-point plastic gasket is between 50 degrees and 60 degrees.

[0020] Furthermore, a plurality of fixing ropes are provided at the upper end of the temperature measuring tube, and the fixing ropes are evenly distributed along the circumference of the temperature measuring tube, and the number of the fixing ropes is preferably 3.

[0021] Compared with the prior art, the present invention has the following technical features and advantages:

[0022] The invention meets the requirement of changing the length of the temperature measuring tube, reduces equipment waste, and reduces the temperature measurement cost; adopts a pre-buried base to solve the problem of low installation efficiency of the temperature measuring tube; the temperature measuring tube can be recycled by coating a release agent on the outside of the temperature measuring tube and threading the temperature measuring tube and the base; the thermal resistance sensor is recycled by wrapping the sensor with oil paper or a steel casing, installing the sensor through a connecting piece, and fixing a pull rope on the connecting piece;

[0023] The installation tube is used to assist the sensor to be attached to the temperature measuring tube and can be used for a long time. The installation opening of the installation tube can avoid the entanglement of the pull ropes and wires of multiple sensors, thus improving the construction efficiency;

[0024] The fixing of the temperature measuring tube and the installation of the sensor are simple and easy to learn, which can reduce labor costs. The setting of the first buckle and the second buckle further improves the efficiency of temperature measurement construction and avoids the entanglement of the pull rope and the wire;

[0025] The location of the temperature measuring tube can be arranged flexibly. Because the temperature measuring tube is mainly fixed by the base, its location can be far away from the steel mesh, reducing the adverse effect of the steel mesh on the accurate measurement of concrete temperature due to the large difference in thermal conductivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a structural schematic diagram of the concrete temperature measuring device of the present invention (the base is truncated cone-shaped);

[0027] Figure 2 yes Figure 1 A magnified image of point A;

[0028] Figure 3 It is a structural schematic diagram of the concrete temperature measuring device of the present invention (the base is conical);

[0029] Figure 4 Schematic diagram of the connection structure between the mounting part and the sensor;

[0030] Figure 5 yes Figure 4 A magnified view of point B;

[0031] Figure 6 It is a three-dimensional structural schematic diagram of the support seat;

[0032] Figure 7 It is a schematic diagram of the structure of the throat hoop;

[0033] 1 base, 21 temperature measuring tube, 22 stabilizing sleeve, 23 mounting hole, 3 sensor, 31 wire, 41 mounting tube, 42 mounting port, 43 support seat, 431 support tube, 432 notch, 433 connecting plate, 434 support rod, 435 slot, 5 protective sleeve, 6 connecting piece, 61 hoop, 62 pull ring, 63 pull rope, 7 low melting point plastic washer, 9 fixing rope. DETAILED DESCRIPTION

[0034] The present invention will be described below in conjunction with the accompanying drawings:

[0035] like Figures 1 to 7 As shown, a concrete temperature measuring device provided by the present invention includes a base 1, a temperature measuring tube 21, a mounting portion, a connector 6, a sensor 3, and a protective sleeve 5; the sensor includes a wire; the sensor is a temperature sensor, and an electric thermistor temperature sensor or a thermocouple sensor can be used. The electric thermistor temperature sensor can specifically use a three-wire or four-wire platinum thermistor.

[0036] The lower end of the temperature measuring tube is detachably connected to the base, such as a threaded connection, and the lower end of the temperature measuring tube 21 can also be threadedly connected to the base 1 through a stabilizing sleeve 22. The base can fix the temperature measuring tube during temperature measurement. The length of the temperature measuring tube is determined according to the thickness of the poured concrete. A mounting hole 23 is provided on the temperature measuring tube, and the sensor 3 is installed in the mounting hole.

[0037] The mounting portion includes a mounting tube 41, a mounting opening 42 is provided on the tube wall of the mounting tube 41 along the axial direction of the mounting tube, the length of the mounting opening is consistent with the length of the mounting tube, the lower end of the mounting tube is connected to a support seat 43, a support rod 434 is provided on the support seat, the angle between the support rod 434 and the mounting tube 41 is 25° to 35°, preferably 30°, when installing the sensor, a card slot 435 is provided at one end of the support rod away from the support seat, which is used to clamp the sensor, and has a supporting and fixing effect on the sensor; the sensor 3 is detachably fixed on the connecting member 6, and a pull rope is also fixed on the connecting member; the outer diameters of the pull rope and the wire are both smaller than the width of the mounting opening; when the sensor is supported by the support rod, the pull rope and the wire both extend out of the upper end of the mounting tube, and the pull rope and the wire pass through the mounting opening and are clamped into the mounting tube;

[0038] When the sensor is fixed on the mounting portion through the connecting piece, the outer diameter of the orthographic projection of the sensor and the mounting portion is smaller than the inner diameter of the temperature measuring tube;

[0039] When the sensor 3 is installed in the mounting hole 23, the pull rope and the wire both extend out of the upper end of the temperature measuring tube 21, and the temperature measuring probe of the sensor passes through the mounting hole 23 to the outside of the temperature measuring tube. A protective sleeve 5 is sleeved on the sensor outside the temperature measuring tube, and the upper end of the protective sleeve is located at the mounting hole or extends through the mounting hole to the temperature measuring tube. The protective sleeve is fixed to the mounting hole by a low-melting-point plastic washer, and the melting point of the low-melting-point plastic washer is between 50 and 60 degrees.

[0040] Considering the convenience of use, multiple temperature measuring tubes can also be used, and each temperature measuring tube is threadedly connected. Figure 6 In order to conveniently install the sensor on the mounting part, the support seat includes a support tube 431, a notch 432 is opened on the tube wall of the support tube, the length of the notch is consistent with the length of the support tube, the upper end of the support tube 431 is sleeved on the lower end of the outer surface of the mounting tube 41, and the lower end of the support tube is connected to a connecting plate 433, the connecting plate and the support tube can be integrally formed, the support rod 434 is arranged on the connecting plate 433, when the support tube is sleeved on the outer surface of the mounting tube, the notch 432 is opposite to the mounting opening 42.

[0041] In some embodiments, Figure 7 The connecting member is a throat hoop, which is provided with a hoop ring 61 and a pull ring 62, the pull ring is preferably a circular ring, the sensor is detachably fixed in the hoop, and the pull rope is fixed on the pull ring. The connecting member may also be a structural member of other structural forms, as long as it can fix the sensor and the pull rope.

[0042] In order to facilitate the recovery of the sensor, the protective sleeve 5 can be an oil-paper sleeve or a steel sleeve. If the protective sleeve is a steel sleeve, lubricating oil is applied between the protective sleeve and the sensor. Whether to use an oil-paper sleeve or a steel sleeve is determined by the pressure of the concrete being measured that the sensor bears.

[0043] like Figure 1 and Figure 3 The base can be truncated cone or conical; when the foundation is hard, such as rock or other dense geology such as dense gravel soil, a truncated cone base is used, at this time, the temperature measuring tube is connected to the small end of the base; when the foundation soil or other soft geology, a conical base is used, at this time, the temperature measuring tube is connected to the large end of the base;

[0044] In order to conveniently fix the pull rope, a fixing ring is provided at the upper end of the temperature measuring tube, and the fixing ring is used to fix the pull rope.

[0045] like Figure 1 In order to facilitate the fixing of the temperature measuring tube during pouring and keep the temperature measuring tube vertical, a plurality of fixing ropes 9 are provided at the upper end of the temperature measuring tube. The fixing ropes are evenly distributed along the circumference of the temperature measuring tube, and the number of fixing ropes is preferably 3.

[0046] The temperature measurement method of the present invention is as follows:

[0047] S1. Install the base. When the foundation is rock or dense gravel soil, a truncated cone base is used, and the base can be placed directly on the foundation. The specific parameters of the truncated cone base are: bottom diameter between 25-35cm, total height 20-25cm, base thickness 10cm, top diameter 20cm, truncated cone slope height 10-15cm, and a threaded hole in the center of the truncated cone base with a depth of 10cm and a diameter of 2 inches; when the foundation is soft soil, a conical base is used, and the base can be driven into the soft soil foundation. The specific parameters of the conical base are: bottom diameter 20-25cm, height 30-35cm, and a threaded hole in the center of the conical base with a depth of 10cm and a diameter of 2 inches. The depth of the conical base into the foundation is based on the top surface and the bottom surface of the casting block being flush. Before installing the temperature measuring tube, the threaded hole in the fixed cone can be sealed with plastic tape or a cover plate. The specific parameters of the base are determined according to the length of the temperature measuring tube. When the temperature measuring tube is long, the parameters of the base take the larger value.

[0048] S2, select the temperature measuring tube according to the thickness of the casting block. The temperature measuring tube 21 adopts a PVC tube with high hardness, a pipe diameter of 2 inches, and a pipe wall thickness selected between 2-3mm depending on the thickness of the casting block. The temperature measuring tube can adopt a 150cm temperature measuring tube, and the bottom of the temperature measuring tube has an external thread connected to the threaded hole of the base. The temperature measuring tube can also adopt multiple temperature measuring tubes of different lengths or the same length, which are made of the same material and can be connected to each other by threads. The threaded connection length is 4cm, the thread spacing is 2mm, and the right-hand thread is right-handed. One end is an internal thread and the other end is an external thread. The bottom of the 150cm temperature measuring tube is connected to the threaded hole of the base with a 10cm long threaded connection section (thread spacing 4mm, left-handed thread). The actual height of the temperature measuring tube length on the top surface of the base is 140cm, which can meet the construction of casting blocks with a thickness of 100-130cm. When the thickness of the casting block is large, the temperature measuring length can be extended by threading multiple temperature measuring tubes to meet the temperature measuring length requirements. A sensor installation hole is reserved 7 cm away from the top surface of the base. When the sensor is installed in the installation hole, the sensor sags about 2 cm, so the temperature measurement position is controlled 5 cm above the bottom of the casting block. Except for the installation hole closest to the base, the remaining installation holes can be drilled on-site according to the thickness of the casting block and temperature measurement requirements.

[0049] S3. Install the sensor on the temperature measuring tube. Figure 4 and Figure 5 , is a schematic diagram of the connection structure between the mounting part and the sensor. The sensor 3 is fixed with the hoop 61 of the throat hoop, and the drawstring 63 is tied to the pull ring of the throat hoop. Then the sensor is placed at the lower end of the mounting tube, and the sensor is inserted into the card slot 435 of the support rod. Then the drawstring and the wire are passed through the mounting port and inserted into the mounting tube to ensure that the drawstring and wire of the installed sensor will not be entangled with other sensor wires and drawstrings. The mounting tube has a diameter of 1 inch and a length of 150 cm. The angle between the support rod and the mounting tube is about 30° to ensure that the space is unobstructed during installation. Then the mounting part with the sensor 3 installed is inserted from the upper end of the temperature measuring tube and sent into the corresponding mounting hole 23. The sensor 3 is aligned with the mounting hole 23 to make the sensor Expose the temperature measuring tube about 2cm, then push the sensor slightly upward from the outside of the temperature measuring tube, and the sensor will be detached from the card slot. Another way to detach the sensor from the card slot is to move the mounting part down to a position slightly lower than the target mounting hole, and then retreat to the vicinity of the wall of the temperature measuring tube opposite the mounting hole. Lifting the mounting part can also detach the sensor from the card slot. After the sensor is detached from the card slot, apply a release agent on the sensor 3, and then sleeve the protective sleeve 5 on the sensor. The upper end of the protective sleeve 5 extends through the mounting hole 23 to the temperature measuring tube 21. At this time, the sensor exposed from the temperature measuring tube is wrapped in the protective sleeve, and then a low-melting-point plastic gasket 7 is installed between the protective sleeve and the mounting hole (see Figure 2), which plays the role of fixing the sensor and sealing the installation hole, then pull the installation part out from the upper end of the temperature measuring tube, and finally tie the pull rope to the fixing ring at the upper end of the temperature measuring tube. Install other sensors in the same way. Install the sensors one by one in the installation hole from bottom to top. If there are multiple temperature measuring tubes, connect the temperature measuring tubes section by section while installing the sensors. When installing the sensors, the temperature measuring tubes can be placed horizontally or vertically. After all sensors are installed, apply a release agent on the outer surface of the temperature measuring tube.

[0050] S4, working status of the temperature measuring tube during the pouring stage. At the beginning of pouring, the bottom of the temperature measuring tube is fixed, and the fixed rope 9 at its upper end is tied to the nearby steel bars to keep the temperature measuring tube vertical. The fixed rope can be made of wire to prevent the upper end of the temperature measuring tube from shaking during the pouring process, affecting the concrete pouring or causing the temperature measuring tube to break. The binding method can be directly fixed on the steel bar, or it can be tightened from three directions at 120° with three wires. The advantage of the second method is that it can reduce the influence of the steel mesh on the temperature measurement of concrete. When keeping the temperature measuring tube vertical, the sensor is drooping and the force is less during the pouring process, which can avoid damage to the sensor. When pouring, try to avoid pouring directly near the top of the temperature measuring tube, and let the freshly mixed concrete flow from the periphery to the surrounding of the temperature measuring tube.

[0051] S5. Working state of the temperature measuring tube when the concrete is hardening. Once the pouring is completed, the temperature measuring tube can maintain stability by itself under the pressure of the fixed end and surrounding concrete. As the hydration heat is released during the hardening process of the concrete, when the concrete temperature rises to about 50°C, the low-melting-point plastic gasket automatically melts, and at this time the concrete is semi-hardened and will not enter the temperature measuring tube, while the sensor has been tilted downward and stuck in the concrete, and can still work normally.

[0052] S8. Recycling of temperature measuring equipment. After the temperature measurement is completed, the sensor will not adhere to the concrete because it is protected by the protective sleeve, and the low-melting-point plastic gasket will melt. When recycling the sensor, pull the pull rope and the sensor will be separated from the protective sleeve to complete the recycling of the sensor. The sensor is removed in a top-down order, and is pulled out from the temperature measuring tube one by one through the recycling pull rope. Coat the outer surface of the temperature measuring tube with a release agent. After all sensors are recycled, rotate the temperature measuring tube to detach it from the threaded hole of the base and then pull it out directly. The recycled sensor can be reused after inspection. The temperature measuring tube can also be used repeatedly. When the position of the sensor installation hole needs to be changed, the hole can be reopened, the old hole can be plugged with a plug, or the part of the temperature measuring tube in the old hole can be directly cut off, and the thread can be re-opened with a tap for use. When there are too many holes on the temperature measuring tube, or the length is too short after multiple cuts, it can be discarded.

[0053] The invention meets the requirement of changing the length of the temperature measuring tube, reduces equipment waste, and lowers the temperature measurement cost; adopts a pre-buried base to solve the problem of low installation and construction efficiency of the temperature measuring tube; the temperature measuring tube can be recovered by applying a release agent on the outside of the temperature measuring tube and threading the temperature measuring tube and the base; and the thermal resistance sensor is recovered by arranging a protective sleeve outside the sensor, installing the sensor through a connecting piece, and fixing a pull rope on the connecting piece.

Claims

1. A concrete temperature measuring device, characterized in that: It includes a base, a temperature measuring tube, a mounting part, a connecting piece, a sensor, and a protective sleeve; the sensor is a temperature sensor, including a wire; The lower end of the temperature measuring tube is detachably connected to the base, and a mounting hole is provided on the temperature measuring tube, in which the sensor is installed; The mounting portion includes a mounting tube, a mounting opening is provided on the tube wall of the mounting tube along the axial direction of the mounting tube, the length of the mounting opening is consistent with the length of the mounting tube, the lower end of the mounting tube is connected to a support seat, a support rod is provided on the support seat, and a card slot is provided at one end of the support rod away from the support seat for supporting and fixing the sensor; the angle between the support rod and the mounting tube is 25° to 35°, the sensor is detachably fixed on the connecting piece, and a pull rope is also fixed on the connecting piece; when the sensor is supported by the support rod, the sensor is detachably fixed on the connecting piece, the pull rope and the wire both extend out of the upper end of the mounting tube, and the pull rope and the wire pass through the mounting opening and are clamped into the mounting tube; When the sensor is fixed on the mounting portion through the connecting piece, the outer diameter of the orthographic projection of the sensor and the mounting portion is smaller than the inner diameter of the temperature measuring tube; When the sensor is installed in the mounting hole, the pull rope and the wire both extend out of the upper end of the temperature measuring tube, and the temperature measuring probe of the sensor passes through the mounting hole to the outside of the temperature measuring tube. A protective sleeve is sleeved on the sensor outside the temperature measuring tube, and the upper end of the protective sleeve is located at the mounting hole or extends through the mounting hole to the temperature measuring tube. A low-melting-point plastic gasket is provided between the protective sleeve and the mounting hole.

2. The concrete temperature measuring device according to claim 1, characterized in that: The support seat includes a support tube, a groove is opened on the tube wall of the support tube, the length of the groove is consistent with the length of the support tube, the upper end of the support tube is sleeved on the lower end of the outer surface of the mounting tube, the lower end of the support tube is connected to a connecting plate, the support rod is arranged on the connecting plate, and when the support tube is sleeved on the outer surface of the mounting tube, the groove is opposite to the mounting opening.

3. The concrete temperature measuring device according to claim 1, characterized in that: The lower end of the temperature measuring tube is threadedly connected to the base through a stable sleeve.

4. The concrete temperature measuring device according to claim 2, characterized in that: There are multiple temperature measuring tubes, and each temperature measuring tube can be threadedly connected.

5. The concrete temperature measuring device according to claim 4, characterized in that: The connecting piece is a throat hoop, on which a hoop ring and a pull ring are arranged, the sensor is detachably fixed in the hoop ring, and the pull rope is fixed on the pull ring.

6. The concrete temperature measuring device according to claim 5, characterized in that: The protective sleeve is an oil-paper sleeve or a steel sleeve. If the protective sleeve is a steel sleeve, a lubricating layer is coated between the protective sleeve and the sensor.

7. The concrete temperature measuring device according to claim 6, characterized in that: The base is in a truncated cone shape or a conical shape; if it is in a truncated cone shape, the temperature measuring tube is connected to the small end of the base, and if it is in a conical shape, the temperature measuring tube is connected to the large end of the base.

8. The concrete temperature measuring device according to claim 1, characterized in that: A fixing ring is arranged on the upper end of the temperature measuring tube.

9. The concrete temperature measuring device according to any one of claims 1 to 8, characterized in that: The sensor is an electric resistance temperature sensor or a thermocouple sensor; the melting point of the low melting point plastic gasket is between 50 degrees and 60 degrees.

10. The concrete temperature measuring device according to claim 9, characterized in that: A plurality of fixing ropes are arranged at the upper end of the temperature measuring tube, and the fixing ropes are evenly distributed along the circumference of the temperature measuring tube.

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