Device for detecting bottom sediment and deep temperature of volcanic vent lake

Abstract

The invention belongs to the technical field of lake sampling measurement, and provides a volcanic vent lake bottom sediment and deep temperature detection device. The device comprises a rock core sampling drill rod, a shell and a rock wall temperature measuring bin, an opening is formed in the middle of the shell, the rock wall temperature measuring bin is arranged in a cavity in the middle of the shell, an opening is formed in one side of the rock wall temperature measuring bin, a rock wall temperature measuring bin elastic body is arranged on the other side of the rock wall temperature measuring bin, and the rock wall temperature measuring bin elastic body is connected with the shell. One side of the rock wall temperature measurement bin is an opening, and the other side is a rock wall temperature measurement bin elastomer, so that the rock wall temperature measurement bin can be tightly attached to the rock wall at the opening at any time, and the problem that the rock wall temperature measurement bin cannot be reset after being pushed away by the raised rock wall due to uneven rock wall and cannot be tightly attached to the rock wall is solved. And lake water at other positions is prevented from entering the rock wall temperature measurement bin, and heat errors caused by heat exchange of the lake water at the water inlet hole of the rock wall temperature measurement bin are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of lake sampling and measurement, and provides a bottom sediment and deep temperature detection device for a crater lake. Background Art

[0002] Most of the crater lakes are located deep in nature reserves with few people and little impact from human activities. The changes in the bottom sediments of crater lakes are mainly determined by the impact of climate change, plant and animal distribution, and volcanic activity in the region. The measurement of the bottom sediments and deep temperature of crater lakes will provide a reference for the current and future regional ecosystem management and the decision-making of regional microclimate change under the background of global climate change. Prior art CN104990765B is a monitoring instrument for pore water in nearshore and estuarine sedimentary layers, including a cone head section, a water inlet chamber pipe, a first main pipe, a second main pipe, a reducer pipe, an extension pipe, and a T-handle connected by a threaded coaxial connection from bottom to top. A water inlet with a filter layer is arranged on the pipe wall of the water inlet chamber pipe, and a partition is arranged between the inner cavity of the water inlet chamber pipe and the inner cavity of the first main pipe, and a chamber water outlet is arranged on the partition; a monitoring probe and a solenoid valve are arranged from top to bottom in the inner cavity of the first main pipe, and the inlet of the solenoid valve is connected to the chamber water outlet, the outlet is connected to the probe water inlet, and the probe outlet is connected to a speed-regulating peristaltic pump. The prior art can collect and monitor pore water at different times or at different depths of sediment layers, but external fluids can enter through the boreholes and device gaps. The inventor believes that there is much room for improvement in the prior art. Summary of the invention

[0003] The purpose of the present invention is to measure the bottom sediment and deep temperature distribution of the crater lake, and to measure the pore water temperature of the rock wall and the water temperature in the borehole. Secondly, the problem that the detection circuit is resistant to high temperature for a long time and it is difficult to measure the bottom sediment and deep temperature of the crater lake is solved; the measurement error caused by the exchange of lake water in the borehole is avoided; and the mud is avoided to block the water channel of the rock wall temperature measuring chamber. To this end, the present invention provides a bottom sediment and deep temperature detection device of the crater lake, including a shell and a rock wall temperature measuring chamber, the middle part of the shell has an opening, and the middle cavity of the shell is provided with a rock wall temperature measuring chamber, one side of the rock wall temperature measuring chamber is an opening, and the other side of the rock wall temperature measuring chamber is a rock wall temperature measuring chamber elastomer, and the rock wall temperature measuring chamber elastomer is connected to the shell. The operator uses a drilling rig to drill a hole in the bottom layer of the crater lake. After drilling the prefabricated core hole, the drilling rig is used to drill the core sampling drill rod and the assembly formed by the present invention vertically down along the core hole to the deep layer of the crater lake, and after reaching the designated position, the temperature of the pore water of the sediment is measured. The middle part of the shell is opened and a rock wall temperature measuring chamber is arranged, which can measure the temperature of the pore water in the rock wall; one side of the rock wall temperature measuring chamber is an opening, and the other side is an elastic body of the rock wall temperature measuring chamber, so that the rock wall temperature measuring chamber can be close to the rock wall at the opening at any time, to avoid the rock wall temperature measuring chamber being pushed away by the protruding rock wall and unable to reset due to the uneven rock wall, resulting in the rock wall temperature measuring chamber being unable to be close to the rock wall, resulting in errors in measuring the temperature of the pore water in the rock wall, and to avoid lake water from other positions entering the rock wall temperature measuring chamber, and the lake water exchanging heat at the water inlet hole of the rock wall temperature measuring chamber causing heat errors.

[0004] Preferably, the bottom of the shell is a borehole temperature measurement part, which includes a cone tip of the lower shell of the probe rod and a borehole temperature measurement module, and the cone tip of the lower shell of the probe rod is located at the end of the shell; along the drilling direction of the core sampling drill rod, the borehole temperature measurement module is located behind the cone tip of the lower shell of the probe rod and close to the cone tip of the lower shell of the probe rod, and the borehole temperature measurement module is provided with a borehole temperature measurement module watertight cable connected to the rock wall temperature measurement chamber. The borehole temperature measurement module is located behind the cone tip of the lower shell of the probe rod and close to the cone tip of the lower shell of the probe rod, and can timely measure the temperature of the fluid in the borehole during the drilling of the probe rod, and avoid the upper lake water from entering and exchanging heat with the fluid in the borehole to cause measurement errors; the borehole temperature measurement module adopts a borehole temperature measurement module watertight cable to connect with the rock wall temperature measurement chamber, and transmits the measurement results to the electronic chamber part with the rock wall temperature measurement chamber as a relay, and the borehole temperature measurement module watertight cable can be bent and deformed, and can adapt to the movement of the rock wall temperature measurement chamber under the action of the rock wall temperature measurement chamber elastic body, so as to keep the rock wall temperature measurement chamber close to the rock wall.

[0005] Preferably, a water inlet hole of the rock wall temperature measuring chamber is provided near the opening side of the rock wall temperature measuring chamber, and an elastic ring surrounds the outer side of the water inlet hole of the rock wall temperature measuring chamber. When the elastic body of the rock wall temperature measuring chamber is stretched, the elastic ring is located outside the shell. Since the outer shell of the rock wall temperature measuring chamber is a rigid structure, it is difficult to completely fit the rugged rock wall. The elastic ring surrounds the outer side of the water inlet hole of the rock wall temperature measuring chamber. The elastic ring has plastic deformation ability and can fit the rock wall under the extrusion of the elastic body of the rock wall temperature measuring chamber, isolating fluids from other positions from entering the water inlet hole of the rock wall temperature measuring chamber, avoiding interference caused by fluids from other positions entering, and improving the measurement accuracy of rock wall pore water; the elastic ring replaces the rock wall temperature measuring chamber to directly contact the rock wall, avoiding friction between the rock wall temperature measuring chamber and the rock wall during the overall drilling process of the device, and the elastic ring creates a gap between the device and the rock wall, which is conducive to the discharge of mud generated during the drilling process of the device along the gap.

[0006] Preferably, the thickness of the outer ring of the elastic ring is greater than the thickness of the inner ring of the elastic ring. The thickness of the outer ring of the elastic ring is greater than the thickness of the inner ring of the elastic ring, which is conducive to forming a drainage inclination angle for the rock wall pore water to quickly enter the rock wall temperature measuring chamber, facilitating the rock wall temperature measuring chamber to measure the rock wall pore water in a timely manner, and avoiding changes in the heat exchange temperature of the rock wall pore water with the external fluid after exposure; the elastic ring is squeezed by the rock wall temperature measuring chamber and the rock wall, and the thickness of the outer ring of the elastic ring is relatively thick and there is a thickness difference with the inner ring, which makes the outer ring of the elastic ring more prone to elastic deformation, and can form a larger sealing surface between the rock wall and the water inlet hole of the rock wall temperature measuring chamber after squeezing, thereby improving the sealing of the rock wall temperature measuring chamber of the rock wall and avoiding external fluid from entering the water inlet hole of the rock wall temperature measuring chamber.

[0007] Preferably, the top of the shell is the electronic compartment part, and a heat insulation pad is provided between the electronic compartment part and the cavity where the rock wall temperature measuring compartment is located. The electronic compartment part is provided on the top, so that cooling water can be transported from the top to cool the electronic compartment part, thereby preventing the detection circuit in the electronic compartment part from malfunctioning or even being damaged in the high temperature environment deep in the crater lake; since the cavity where the rock wall temperature measuring compartment is located continuously performs the temperature measurement cycle of the rock wall pore water, the cavity where the rock wall temperature measuring compartment is located is in a high temperature state, and the provision of a heat insulation pad can reduce the influence of the temperature of the cavity where the rock wall temperature measuring compartment is located on the electronic compartment part.

[0008] Preferably, the electronic compartment part includes an electronic compartment pressure-resistant tube and a water outlet hole on the probe rod upper shell. The water outlet hole on the probe rod upper shell is located on the shell side wall. There is a gap between the electronic compartment pressure-resistant tube and the inner wall of the probe rod device. The gap is a probe rod cooling water channel. One end of the probe rod cooling water channel is connected to the docking joint of the shell, and the other end of the probe rod cooling water channel is connected to the water outlet hole on the probe rod upper shell. It should be noted that the core sampling drill rod docked with the present invention needs to be provided with a through hole, which is conducive to transporting the low-temperature lake water above the device downward into the probe rod cooling water channel on the top of the device, thereby improving the cooling efficiency of the probe rod cooling water channel and ensuring the normal operation of the electronic compartment part.

[0009] Preferably, the water outlet hole of the upper shell of the probe rod is located below the pressure-resistant cylinder of the electronic warehouse, and the water outlet hole of the upper shell of the probe rod is an inclined hole. The water outlet hole of the upper shell of the probe rod is located below the pressure-resistant cylinder of the electronic warehouse, which is conducive to the cooling water channel of the probe rod surrounding the entire pressure-resistant cylinder of the electronic warehouse, increasing the heat exchange area between the pressure-resistant cylinder of the electronic warehouse and the cooling water channel of the probe rod, and improving the cooling efficiency; the water outlet hole of the upper shell of the probe rod is an inclined hole, so that the cooling water can be sprayed upward after flowing out, reducing the impact on the temperature measurement of the temperature measuring chamber of the rock wall below, and forming an upward water flow, which can not only avoid blocking the mud discharged during the drilling process, but also take away the debris with larger volume and mass in the mud, and avoid the debris accumulated in the gap between the probe rod device and the rock wall during the drilling process of the probe rod device.

[0010] Preferably, the rock wall temperature measuring chamber includes a high temperature resistant pump and a temperature measuring probe, one end of the high temperature resistant pump is connected to the water inlet of the rock wall temperature measuring chamber, the other end of the high temperature resistant pump is provided with a water outlet filter screen separating the rock wall temperature measuring chamber, and the rock wall temperature measuring chamber is provided with a temperature measuring probe in a chamber on the side of the water outlet filter screen away from the high temperature resistant pump. The high temperature resistant pump is used to actively suck the rock wall pore water, shorten the sampling time of the rock wall pore water, and reduce the influence of the heat exchange between the rock wall pore water and the outside world after exposure on the measurement results; further, the high temperature resistant pump uses a turbine pump, which can better adapt to the high temperature and high pressure environment of the deep layer of the crater lake, can transport gas-liquid mixture, and withstand the cavitation effect of the gas contained in the rock wall pore water on the high temperature resistant pump.

[0011] Preferably, the rock wall temperature measuring chamber is provided with a rock wall temperature measuring chamber water outlet in the chamber where the temperature measuring probe is located, and the temperature measuring probe is connected to the electronic chamber part by a double-headed watertight cable. The double-headed watertight cable transmits the measurement data of the temperature measuring probe and the borehole temperature measuring module to the electronic chamber, and the double-headed watertight cable is bendable and deformable, and can adapt to the movement of the rock wall temperature measuring chamber under the action of the rock wall temperature measuring chamber elastic body, so as to keep the rock wall temperature measuring chamber close to the rock wall.

[0012] The present invention provides a bottom sediment and deep temperature detection device for a crater lake, which can measure the deep temperature distribution of the crater lake, and can measure the pore water temperature of the rock wall and the water temperature in the borehole by sticking to the wall; solve the problem that the detection circuit is resistant to high temperature for a long time and it is difficult to realize the deep temperature measurement of the crater lake; avoid the measurement error caused by the exchange of external fluid in the borehole; avoid the clogging of the water channel of the rock wall temperature measuring chamber by mud, and has the following beneficial effects: avoid the external fluid from entering the rock wall temperature measuring chamber, and the heat error caused by the heat exchange of the external fluid at the water inlet hole of the rock wall temperature measuring chamber; the elastic ring has the ability of plastic deformation, and can fit the rock wall under the extrusion of the elastic body of the rock wall temperature measuring chamber, isolate the external fluid from entering the water inlet hole of the rock wall temperature measuring chamber, and avoid the external fluid from entering the device to cause interference; the water outlet hole of the upper shell of the probe rod is an inclined hole, so that the cooling water can be sprayed upward after flowing out, reduce the influence on the temperature measurement of the rock wall temperature measuring chamber below, and avoid blocking the mud discharged during the drilling process of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0014] Figure 1 This is a schematic diagram of the bottom sediment and deep temperature detection device of the crater lake; Figure 2 It is a cross-sectional schematic diagram of the bottom sediment and deep temperature detection device of the crater lake; Figure 3 It is a structural schematic diagram of the rock wall temperature measuring chamber and its internal structure of the present invention; Figure 4 For the present invention Figure 3 A partial enlarged view of the M in the middle; Figure 5 It is a partial enlarged view of the water outlet hole of the upper shell of the probe rod of the present invention; Figure 6 For the present invention Figure 3 A local enlarged view of the N position in the middle; Figure 7 For the present invention Figure 3 A partial enlarged view of the K in the middle; Figure 8 For the present invention Figure 3 A partial enlarged view of the L in the middle.

[0015] Explanation of reference numerals: 1 lifting device; 2 lifting cable; 3 drilling device; 4 bottom sediment; 5 crater lake; 6 bottom sediment and deep temperature detection device of crater lake; 601 tapered thread joint; 602 upper end cover of electronic warehouse; 603 pressure-resistant cylinder of electronic warehouse; 604 lower end cover of electronic warehouse; 605 first thermal insulation pad; 606 connecting bolt; 607 threaded joint; 608 water-tight socket of electronic warehouse; 609 double-headed watertight cable; 610 upper end watertight socket of rock wall temperature measuring warehouse; 611 elastomer of rock wall temperature measuring warehouse; 612 elastomer fixing seat of rock wall temperature measuring warehouse; 613 water-permeable material; 614 drilling temperature measuring module; 615 water inlet hole of rock wall temperature measuring warehouse; 616 rock wall temperature measuring chamber; 617 rock wall temperature measuring module; 6171 high temperature resistant pump; 6172 high temperature resistant pipe; 6173 water outlet filter; 6174 temperature measuring cap; 6175 temperature measuring probe; 6176 water outlet hole of rock wall temperature measuring chamber; 6177 water inlet filter; 6178 rock wall temperature measuring chamber cylinder; 618 probe rod lower shell; 619 probe rod upper shell water outlet hole; 620 temperature acquisition circuit module; 621 power supply module; 622 fixing bracket; 623 probe rod upper shell; 624 second thermal insulation pad; 625 probe rod cooling water channel; 626 rock wall temperature measuring chamber lower end watertight socket; 627 drilling temperature measuring module watertight cable; 628 probe rod lower shell cone tip; 629 elastic ring. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Embodiment 1 like Figure 1 As shown, the operator operates the shore-based or ship-borne hoisting device 1 on the surface of the crater lake 5 according to the sampling site selection, and lowers the drilling device 3 to the bottom of the crater lake 5 through the hoisting cable 2. In this embodiment, it is a shore-based hoisting device 1. After the drilling device 3 is stable, the core sampling drill rod is used to drill the bottom sediment 4 of the crater lake 5. After the prefabricated core hole is drilled, the assembly formed by the core sampling drill rod and the bottom sediment of the crater lake and the deep temperature detection device 6 is drilled vertically along the core hole to the deep layer of the crater lake, and the temperature of the sediment pore water is measured after reaching the designated position. During the measurement process, the rock wall temperature measuring chamber 616 squeezes the elastic ring 629 under the action of the rock wall temperature measuring chamber elastomer 611 to always fit the rock wall, and obtains the rock wall pore water from the rock wall temperature measuring chamber water inlet hole 615 to enter the rock wall temperature measuring chamber 616. After the measurement is completed, the drilling rig 3 successively retracts the core sampling drill rod 5 and the bottom sediments of the crater lake and the deep temperature detection device 6 from the drilling rig 3 , and the hoisting device recovers the drilling rig 3 near the crater lake 5 through the hoisting cable 2 .

[0018] like Figure 2 As shown, a bottom sediment and deep temperature detection device 6 of a crater lake includes a tapered thread joint 601, an upper end cover 602 of an electronic compartment, a pressure-resistant cylinder 603 of an electronic compartment, a lower end cover 604 of an electronic compartment, a first heat insulation pad 605, a connecting bolt 606, a threaded joint 607, a watertight socket 608 of an electronic compartment, a double-headed watertight cable 609, a watertight socket 610 at the upper end of a rock wall temperature measuring compartment, an elastic body 611 of a rock wall temperature measuring compartment, a fixing seat 612 of an elastic body of a rock wall temperature measuring compartment, and a water-permeable material 613. , borehole temperature measurement module 614, rock wall temperature measurement chamber water inlet 615, rock wall temperature measurement chamber 616, rock wall temperature measurement module 617, probe rod lower shell 618, probe rod upper shell water outlet 619, temperature acquisition circuit module 620, power module 621, fixed bracket 622, probe rod upper shell 623, second thermal insulation pad 624, probe rod cooling water channel 625, rock wall temperature measurement chamber lower end watertight socket 626, borehole temperature measurement module watertight cable 627, probe rod lower shell cone tip 628, elastic ring 629. The butt joint adopts a tapered thread butt joint 601 to connect, which can realize threaded connection with the core coring drill rod 5, and the rotary butt joint mechanism of the drilling rig device can realize automatic butt joint.

[0019] like Figure 3 As shown, the rock wall temperature measuring chamber 616 includes a high temperature resistant pump 6171, a high temperature resistant pipe 6172, a water outlet filter 6173, a temperature measuring cap 6174, a temperature measuring probe 6175, a rock wall temperature measuring chamber water outlet hole 6176, a water inlet filter 6177, and a rock wall temperature measuring chamber cylinder 6178. One end of the high temperature resistant pump 6171 is connected to the rock wall temperature measuring chamber water inlet hole 615, and the other end of the high temperature resistant pump 6171 is provided with a water outlet filter 6173 separating the rock wall temperature measuring chamber 616. The rock wall temperature measuring chamber 616 is provided with a temperature measuring probe 6175 in a chamber on one side of the water outlet filter 6173 away from the high temperature resistant pump 6171. A high-temperature resistant pump 6171 is used to actively suck in the pore water in the rock wall, shortening the sampling time of the pore water in the rock wall and reducing the impact of heat exchange between the pore water in the rock wall and the outside world on the measurement results after exposure. Furthermore, the high-temperature resistant pump 6171 uses a turbine pump, which can better adapt to the high-temperature and high-pressure environment deep in the crater lake, can transport gas-liquid mixtures, and withstand the cavitation effect of the gas contained in the pore water in the rock wall on the high-temperature resistant pump 6171.

[0020] like Figure 4As shown, the top of the shell is the electronic compartment part, and a first thermal insulation pad 605 is provided between the electronic compartment part and the cavity where the rock wall temperature measuring compartment 616 is located. The probe rod upper shell 623 and the probe rod lower shell 618 are connected by a threaded joint 607. The first thermal insulation pad 605 has two through holes passing through the connecting bolts 606. The first thermal insulation pad 605 is installed between the lower end cover 604 of the electronic compartment and the threaded joint 607 to play a sealing role. The lower end cover 604 of the electronic compartment is fixed to the threaded joint 607 by two connecting bolts 606, and the electronic compartment watertight socket 608 is fixed to the threaded joint 607 by threads.

[0021] An electronic warehouse part is arranged on the top to facilitate the delivery of cooling water from the top to cool down the electronic warehouse part, so as to prevent the detection circuit in the electronic warehouse part from malfunctioning or even being damaged in the high temperature environment deep in the crater lake; since the cavity where the rock wall temperature measuring warehouse 616 is located continuously performs temperature measurement circulation of the rock wall pore water, the cavity where the rock wall temperature measuring warehouse 616 is located is in a high temperature state, and the provision of a first thermal insulation pad 605 can reduce the influence of the cavity temperature where the rock wall temperature measuring warehouse 616 is located on the electronic warehouse part.

[0022] The electronic compartment part includes the electronic compartment pressure-resistant cylinder 603 and the water outlet hole 619 of the upper shell of the probe rod. The water outlet hole 619 of the upper shell of the probe rod is located on the side wall of the shell. There is a gap between the electronic compartment pressure-resistant cylinder 603 and the inner wall of the probe rod device 6. The gap is the probe rod cooling water channel 625. One end of the probe rod cooling water channel 625 is connected to the through hole of the docking joint, and the other end of the probe rod cooling water channel 625 is connected to the water outlet hole 619 of the upper shell of the probe rod. The core sampling drill rod is provided with a through hole, which is connected to the tapered threaded docking joint 601 of the device, which is conducive to transporting the low-temperature lake water above the device downward into the probe rod cooling water channel 625 at the top of the device, improving the cooling efficiency of the probe rod cooling water channel 625, and ensuring the normal operation of the electronic compartment part.

[0023] like Figure 5 As shown, the water outlet hole 619 on the probe rod upper shell is located below the electronic warehouse pressure tube 603, and the water outlet hole 619 on the probe rod upper shell is an inclined hole. The water outlet hole 619 on the probe rod upper shell is located below the electronic warehouse pressure tube 603, which is beneficial for the probe rod cooling water channel 625 to surround the entire electronic warehouse pressure tube 603, increase the heat exchange area between the electronic warehouse pressure tube 603 and the probe rod cooling water channel 625, and improve the cooling efficiency; the water outlet hole 619 on the probe rod upper shell is an inclined hole, so that the cooling water can be sprayed upward after flowing out, reducing the impact on the temperature measurement of the rock wall temperature measuring chamber 616 below, and forming an upward water flow, which can not only avoid blocking the mud discharged during the drilling process, but also accumulate in the gap between the probe rod device 6 and the rock wall. It can take away debris with larger volume and mass in the mud, and avoid the accumulation of debris during the drilling process of the probe rod device 6. like Figure 6As shown, the rock wall temperature measuring chamber 616 is provided with a rock wall temperature measuring chamber water outlet 6176 in the chamber where the temperature measuring probe 6175 is located, and the temperature measuring probe 6175 is connected to the electronic chamber part by a double-ended watertight cable 609. The double-ended watertight cable 609 transmits the measurement data of the temperature measuring probe 6175 and the borehole temperature measuring module 614 to the electronic chamber, and the double-ended watertight cable 609 is bendable and deformable, and can adapt to the movement of the rock wall temperature measuring chamber 616 under the action of the rock wall temperature measuring chamber elastic body 611, so as to keep the rock wall temperature measuring chamber 616 close to the rock wall.

[0024] like Figure 7 As shown, the middle of the shell has an opening, a rock wall temperature measuring chamber 616 is provided in the middle cavity of the shell, one side of the rock wall temperature measuring chamber 616 is an opening, and the other side of the rock wall temperature measuring cavity is a rock wall temperature measuring chamber elastic body 611, and the rock wall temperature measuring chamber elastic body 611 is connected to the shell. In this embodiment, the rock wall temperature measuring chamber elastic body fixing seat 612 is fixed to the inner wall of the lower shell 618 of the probe rod by screws, three rock wall temperature measuring chamber elastic bodies 611 connect the rock wall temperature measuring chamber 616 and the rock wall temperature measuring chamber elastic body fixing seat 612, the side wall of the lower shell 618 of the probe rod is open, the rock wall temperature measuring chamber 616 is ejected outward by the rock wall temperature measuring chamber elastic body 611, and the rock wall temperature measuring chamber 616 is exposed from the side wall opening of the lower shell 618 of the probe rod.

[0025] Through the above-mentioned arrangement, the middle part of the shell is opened and a rock wall temperature measuring chamber 616 is arranged, which can measure the temperature of the pore water in the rock wall against the wall; one side of the rock wall temperature measuring chamber 616 is an opening, and the other side is a rock wall temperature measuring chamber elastomer 611, so that the rock wall temperature measuring chamber 616 can be close to the rock wall at the opening at any time, to avoid the rock wall temperature measuring chamber 616 being pushed away by the protruding rock wall and unable to reset due to the uneven rock wall, resulting in the rock wall temperature measuring chamber 616 being unable to be close to the rock wall, resulting in errors in measuring the temperature of the pore water in the rock wall, and to avoid lake water from other positions entering the rock wall temperature measuring chamber 616, and the lake water exchanging heat at the water inlet 615 of the rock wall temperature measuring chamber causing heat errors.

[0026] like Figure 7As shown, a rock wall temperature measuring chamber water inlet hole 615 is provided near the opening side of the rock wall temperature measuring chamber 616, and an elastic ring 629 surrounds the outer side of the rock wall temperature measuring chamber water inlet hole 615. When the rock wall temperature measuring chamber elastomer 611 is stretched, the elastic ring 629 is located outside the shell. Since the outer shell of the rock wall temperature measuring chamber 616 is a rigid structure and is difficult to completely fit the rugged rock wall, an elastic ring 629 surrounds the outer side of the water inlet hole 615 of the rock wall temperature measuring chamber. The elastic ring 629 has plastic deformation ability and can fit the rock wall under the extrusion of the rock wall temperature measuring chamber elastomer 611, isolating the external fluid from entering the water inlet hole 615 of the rock wall temperature measuring chamber, avoiding interference caused by the entry of external fluid from other positions, and improving the measurement accuracy of the rock wall pore water; the elastic ring 629 replaces the rock wall temperature measuring chamber 616 to directly contact the rock wall, avoiding the friction between the rock wall temperature measuring chamber 616 and the rock wall during the overall drilling process of the device, and the elastic ring 629 creates a gap between the device and the rock wall, which is conducive to the discharge of mud generated during the drilling process of the device along the gap.

[0027] The thickness of the outer ring of the elastic ring 629 is greater than the thickness of the inner ring of the elastic ring 629. The thickness of the outer ring of the elastic ring 629 is greater than the thickness of the inner ring of the elastic ring 629, which is conducive to forming a drainage inclination angle for the rock wall pore water to quickly enter the rock wall temperature measuring chamber 616, facilitating the timely measurement of the rock wall pore water by the rock wall temperature measuring chamber 616, and avoiding the change of the temperature of the rock wall pore water after being exposed to the heat exchange with the external fluid; the elastic ring 629 is squeezed by the rock wall temperature measuring chamber 616 and the rock wall, and the thickness of the outer ring of the elastic ring 629 is relatively thick and there is a thickness difference with the inner ring, so that the outer ring of the elastic ring 629 is more prone to elastic deformation, and can form a larger sealing surface between the rock wall and the water inlet 615 of the rock wall temperature measuring chamber 616 after squeezing, thereby improving the sealing of the rock wall temperature measuring chamber 616 of the rock wall and avoiding the external fluid from entering the water inlet 615 of the rock wall temperature measuring chamber.

[0028] like Figure 8 As shown, the bottom of the shell is the borehole temperature measurement part, which includes the probe rod lower shell cone tip 628 and the borehole temperature measurement module 614. The probe rod lower shell cone tip 628 is located at the end of the shell; along the drilling direction of the core sampling drill rod, the borehole temperature measurement module 614 is located behind the probe rod lower shell cone tip 628 and close to the probe rod lower shell cone tip 628. The borehole temperature measurement module 614 is provided with a borehole temperature measurement module watertight cable 627 connected to the rock wall temperature measurement chamber 616. The permeable material 613 is a permeable ceramic fixed to the bottom of the lower probe rod. The borehole temperature measurement module 614 is fixed to the probe rod lower shell 618 by threads and is covered by the permeable material 613. The probe rod lower shell cone tip 628 is fixed to the bottom of the probe rod lower shell 618 by threads.

[0029] Through the above-mentioned arrangement, the borehole temperature measuring module 614 is located behind the cone tip 628 of the lower shell of the probe rod and close to the cone tip 628 of the lower shell of the probe rod, and can timely measure the temperature of the fluid in the borehole during the drilling of the probe rod to avoid the entry of lake water above and the heat exchange with the fluid in the borehole causing measurement errors; the borehole temperature measuring module 614 adopts a borehole temperature measuring module watertight cable 627 to be connected to the rock wall temperature measuring chamber 616, and uses the rock wall temperature measuring chamber 616 as a relay to transmit the measurement results to the electronic chamber part, and the borehole temperature measuring module watertight cable 627 can be bent and deformed to avoid limiting the freedom of the rock wall temperature measuring chamber 616, and can adapt to the movement of the rock wall temperature measuring chamber 616 under the action of the rock wall temperature measuring chamber elastomer 611, so as to keep the rock wall temperature measuring chamber 616 close to the rock wall.

[0030] The present invention provides a bottom sediment and deep temperature detection device for a crater lake, which can measure the deep temperature distribution of the crater lake, and can measure the pore water temperature of the rock wall and the water temperature in the borehole by sticking to the wall; solve the problem that the detection circuit can withstand high temperature for a long time and it is difficult to realize the deep temperature measurement of the crater lake; avoid the measurement error caused by the exchange of lake water in the borehole; avoid the clogging of the water channel of the rock wall temperature measuring chamber 616 by mud, and has the following beneficial effects: avoid the lake water in other positions from entering the rock wall temperature measuring chamber 616, and the lake water in the rock wall temperature measuring chamber 616 is prevented from entering the rock wall temperature measuring chamber 616. Heat exchange at the water inlet hole 615 of the temperature chamber causes heat error; the elastic ring 629 has the ability of plastic deformation, and can fit the rock wall under the extrusion of the rock wall temperature measuring chamber elastomer 611, isolating the external fluid from entering the water inlet hole 615 of the rock wall temperature measuring chamber, and avoiding the external fluid from other positions from entering the device and causing interference; the water outlet hole 619 of the upper shell of the probe rod is an inclined hole, so that the cooling water can be sprayed upward after flowing out, reducing the impact on the temperature measurement of the rock wall temperature measuring chamber 616 below, and avoiding blocking the mud discharged during the drilling process of the device.

[0031] The above embodiments and / or implementation methods are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present invention, and are not intended to limit the implementation methods of the technology of the present invention in any form. Any technical personnel in this field may make slight changes to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present invention, but they should still be regarded as technologies or embodiments that are essentially the same as the present invention.

Claims

1. A device for detecting bottom sediment and deep temperature of a crater lake, comprising a shell and a rock wall temperature measuring chamber (616), characterized in that: The shell has a docking joint on the top, the shell has an opening in the middle, a rock wall temperature measuring chamber (616) is provided in the middle cavity of the shell, one side of the rock wall temperature measuring chamber (616) is the opening, the other side of the rock wall temperature measuring chamber (616) is a rock wall temperature measuring chamber elastomer (611), and the rock wall temperature measuring chamber elastomer (611) is connected to the shell.

2. The bottom sediment and deep temperature detection device of a crater lake according to claim 1, characterized in that: The bottom of the shell is a borehole temperature measurement part, which includes a probe rod lower shell cone tip (628) and a borehole temperature measurement module (614), wherein the probe rod lower shell cone tip (628) is located at the end of the shell; the core sampling drill rod (5) has a downward drilling direction that is forward, and the borehole temperature measurement module (614) is located behind the probe rod lower shell cone tip (628) and is close to the probe rod lower shell cone tip (628). The borehole temperature measurement part also includes a borehole temperature measurement module watertight cable (627), and the borehole temperature measurement module (614) is connected to the rock wall temperature measurement chamber (616) using the borehole temperature measurement module watertight cable (627).

3. The bottom sediment and deep temperature detection device of a crater lake according to claim 1, characterized in that: The rock wall temperature measuring chamber (616) is provided with a rock wall temperature measuring chamber water inlet hole (615) on one side close to the opening, and an elastic ring (629) surrounds one end of the rock wall temperature measuring chamber water inlet hole (615) close to the outside, and when the rock wall temperature measuring chamber elastic body (611) is extended, the elastic ring (629) is located outside the shell.

4. The bottom sediment and deep temperature detection device of a crater lake according to claim 3, characterized in that: The outer ring thickness of the elastic ring (629) is greater than the inner ring thickness of the elastic ring (629).

5. The bottom sediment and deep temperature detection device of a crater lake according to claim 3, characterized in that: The top of the shell is an electronic compartment part, and a first heat insulation pad (605) is provided between the electronic compartment part and the cavity where the rock wall temperature measurement compartment (616) is located.

6. The bottom sediment and deep temperature detection device of a crater lake according to claim 5, characterized in that: The electronic bin portion comprises an electronic bin pressure-resistant tube (603) and a water outlet hole (619) on a probe rod upper shell; the water outlet hole (619) on the probe rod upper shell is located on a side wall of the shell; a gap is provided between the electronic bin pressure-resistant tube (603) and an inner wall of the probe rod device; the gap is a probe rod cooling water channel (625); one end of the probe rod cooling water channel (625) is connected to the docking joint; the other end of the probe rod cooling water channel (625) is connected to the water outlet hole (619) on the probe rod upper shell.

7. The bottom sediment and deep temperature detection device of a crater lake according to claim 6, characterized in that: The water outlet hole (619) of the upper shell of the probe rod is located below the pressure-resistant cylinder (603) of the electronic compartment, and the water outlet hole (619) of the upper shell of the probe rod is an inclined hole.

8. The device for detecting bottom sediment and deep temperature of a crater lake according to claim 5, characterized in that: The rock wall temperature measuring chamber (616) comprises a high temperature resistant pump (6171) and a temperature measuring probe (6175); one end of the high temperature resistant pump (6171) is connected to the water inlet (615) of the rock wall temperature measuring chamber; the other end of the high temperature resistant pump (6171) is provided with a water outlet filter (6173) separating the rock wall temperature measuring chamber (616); the rock wall temperature measuring chamber (616) is provided with the temperature measuring probe (6175) in a chamber on one side of the water outlet filter (6173) away from the high temperature resistant pump (6171).

9. The bottom sediment and deep temperature detection device of a crater lake according to claim 8, characterized in that: The rock wall temperature measuring chamber (616) is provided with a rock wall temperature measuring chamber water outlet hole (6176) in the chamber where the temperature measuring probe (6175) is located, and the temperature measuring probe (6175) is connected to the electronic chamber part by a double-headed watertight cable (609).

Images