An apparatus for detecting bottom sediments and deep temperatures of a crater lake

Abstract

The present invention belongs to the technical field of lake sampling measurement, and provides a device for detecting the bottom sediment and deep temperature of a crater lake. The device includes a core sampling drill rod, a housing, and a rock wall temperature measurement chamber. The middle part of the housing has an opening. A rock wall temperature measurement chamber is arranged in the middle cavity of the housing. One side of the rock wall temperature measurement chamber is an opening, and the other side is a rock wall temperature measurement chamber elastomer, which is connected to the housing. One side of the rock wall temperature measurement chamber is an opening, and the other side is a rock wall temperature measurement chamber elastomer, so that the rock wall temperature measurement chamber can always closely adhere to the rock wall at the opening, avoiding the situation that due to the unevenness of the rock wall, the rock wall temperature measurement chamber is pushed away by the protruding rock wall and cannot be reset, resulting in the rock wall temperature measurement chamber being unable to closely adhere to the rock wall, resulting in errors in measuring the temperature of the pore water in the rock wall, and also avoiding the lake water at other positions from entering the rock wall temperature measurement chamber, and the heat exchange at the water inlet hole of the rock wall temperature measurement chamber causing heat errors.

Description

Technical Field

[0001] The present invention relates to the technical field of lake sampling and measurement, and provides a device for detecting bottom sediments and deep temperatures of crater lakes. Background Art

[0002] Most crater lakes are located deep in nature reserves with sparse population and little human activity. The changes in the bottom sediments of crater lakes mainly depend on the influence of regional climate change, distribution of animals and plants, volcanic activities, etc. Measuring the bottom sediments and deep temperatures of crater lakes will provide a reference for the management of the current and future regional ecosystem and decision-making on coping with regional small climate changes under the background of global climate change. The prior art CN104990765B is a monitoring instrument for pore water in nearshore and estuarine sediment layers, including a cone head section, a water inlet chamber pipe, a first main pipe, a second main pipe, a reduced-diameter adapter pipe, an extension pipe, and a T-shaped handle coaxially connected by threads from bottom to top. The pipe wall of the water inlet chamber pipe is provided with a water inlet with a filter layer. 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 passing port is arranged on the partition; a monitoring probe and a solenoid valve are arranged in the inner cavity of the first main pipe from top to bottom. The inlet of the solenoid valve is connected to the chamber water passing port, the outlet is connected to the probe water inlet, and the probe water outlet is connected to a speed-regulating peristaltic pump. The prior art can collect and monitor pore water at different times or different sediment layer depths, but external fluids can enter along the borehole and the gaps of the device. The inventor believes that there is great room for improvement in the prior art. Summary of the Invention

[0003] The object of the present invention is to measure the underlying sediment and deep temperature distribution of a crater lake, and to measure the temperature of pore water in the rock wall and the water body in the borehole by adhering to the wall. Secondly, it solves the problems that the detection circuit is resistant to high temperature for a long time and it is difficult to measure the underlying sediment and deep temperature of the crater lake; it avoids the measurement error caused by the exchange of lake water in the borehole; and it avoids the mud blocking the water channel of the temperature measurement chamber on the rock wall. For this purpose, the present invention provides a device for detecting the underlying sediment and deep temperature of a crater lake, which includes a housing and a temperature measurement chamber on the rock wall. There is an opening in the middle of the housing. A temperature measurement chamber on the rock wall is arranged in the middle cavity of the housing. One side of the temperature measurement chamber on the rock wall is an opening, and the other side of the rock wall temperature measurement cavity is an elastomer of the temperature measurement chamber on the rock wall, and the elastomer of the temperature measurement chamber on the rock wall is connected to the housing. The operator uses a drilling rig device to drill a hole in the bottom layer of the crater lake. After drilling the prefabricated core hole, the core sampling drill rod and the assembly formed by the present invention are vertically drilled along the core hole to the deep layer of the crater lake by using the drilling rig device. After reaching the designated position, the temperature of the pore water in the sediment is measured. The middle of the housing is open and the temperature measurement chamber on the rock wall is arranged, which can measure the temperature of the pore water in the rock wall by adhering to the wall; one side of the temperature measurement chamber on the rock wall is an opening, and the other side is an elastomer of the temperature measurement chamber on the rock wall, so that the temperature measurement chamber on the rock wall can always closely adhere to the rock wall at the opening, avoiding that the temperature measurement chamber on the rock wall is pushed away by the protruding rock wall and cannot be reset due to the unevenness of the rock wall, resulting in the temperature measurement chamber on the rock wall not being able to closely adhere to the rock wall, resulting in an error in measuring the temperature of the pore water in the rock wall, and avoiding the lake water at other positions from entering the temperature measurement chamber on the rock wall, and the heat exchange at the water inlet hole of the temperature measurement chamber on the rock wall causing a heat error.

[0004] Preferably, the bottom of the housing is a temperature measurement part for the borehole. The temperature measurement part for the borehole includes a taper tip of the lower housing of the probe rod and a borehole temperature measurement module. The taper tip of the lower housing of the probe rod is located at the end of the housing; along the drilling direction of the core sampling drill rod, the borehole temperature measurement module is located behind the taper tip of the lower housing of the probe rod and closely adheres to the taper tip of the lower housing of the probe rod. The borehole temperature measurement module is provided with a waterproof cable of the borehole temperature measurement module connected to the temperature measurement chamber on the rock wall. The borehole temperature measurement module is located behind the taper tip of the lower housing of the probe rod and closely adheres to the taper tip of the lower housing of the probe rod, which can timely measure the temperature of the fluid in the borehole during the drilling process of the probe rod, and avoid the measurement error caused by the heat exchange between the lake water above and the fluid in the borehole; the borehole temperature measurement module is connected to the temperature measurement chamber on the rock wall by using the waterproof cable of the borehole temperature measurement module, and the measurement result is transmitted to the electronic chamber part with the temperature measurement chamber on the rock wall as a relay, and the waterproof cable of the borehole temperature measurement module can be bent and deformed, and can adapt to the movement of the temperature measurement chamber on the rock wall under the action of the elastomer of the temperature measurement chamber on the rock wall, and keep the temperature measurement chamber on the rock wall closely adhering to the rock wall.

[0005] Preferably, a water inlet hole of the rock wall temperature measurement bin is provided on one side of the rock wall temperature measurement bin close to the opening, and an elastic ring is arranged around the outside of the water inlet hole of the rock wall temperature measurement bin. When the elastic body of the rock wall temperature measurement bin extends, the elastic ring is located outside the shell. Since the outer shell of the rock wall temperature measurement bin is a rigid structure and it is difficult to completely fit the rugged rock wall, an elastic ring is arranged around the outside of the water inlet hole of the rock wall temperature measurement bin. 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 measurement bin, isolating the fluid at other positions from entering the water inlet hole of the rock wall temperature measurement bin, avoiding the interference caused by the entry of the fluid at other positions, and improving the measurement accuracy of the pore water in the rock wall; the elastic ring replaces the direct contact between the rock wall temperature measurement bin and the rock wall, avoiding the friction between the rock wall temperature measurement bin and the rock wall during the overall drilling process of the device, and the gap between the device and the rock wall formed by the elastic ring is beneficial to the discharge of the mud generated during the drilling process of the device along the gap.

[0006] Preferably, the outer ring thickness of the elastic ring is greater than the inner ring thickness of the elastic ring. The outer ring thickness of the elastic ring being greater than the inner ring thickness of the elastic ring is beneficial to forming a drainage inclination angle for the rapid entry of the pore water in the rock wall into the rock wall temperature measurement bin, facilitating the timely measurement of the pore water in the rock wall by the rock wall temperature measurement bin, and avoiding the change of the temperature of the pore water in the rock wall due to heat exchange with the external fluid after exposure; under the extrusion of the rock wall temperature measurement bin and the rock wall, the outer ring thickness of the elastic ring is thicker and there is a thickness difference with the inner ring, making the outer ring of the elastic ring more likely to undergo elastic deformation, and being able to form a larger sealing surface between the rock wall and the water inlet hole of the rock wall temperature measurement bin after extrusion, improving the sealing performance of the rock wall temperature measurement bin of the rock wall and avoiding the entry of external fluid into the water inlet hole of the rock wall temperature measurement bin.

[0007] Preferably, the top of the shell is an electronic bin part, and a heat insulation pad is provided between the electronic bin part and the cavity where the rock wall temperature measurement bin is located. Setting the electronic bin part at the top facilitates the transportation of cooling water from the top to cool the electronic bin part, avoiding the failure or even damage of the detection circuit in the electronic bin part in the high-temperature environment deep in the crater lake; since the cavity where the rock wall temperature measurement bin is located continuously conducts the temperature measurement cycle of the pore water in the rock wall and the cavity where the rock wall temperature measurement bin is located is in a high-temperature state, setting a heat insulation pad can reduce the influence of the temperature of the cavity where the rock wall temperature measurement bin is located on the electronic bin part.

[0008] Preferably, the electronic bin part includes an electronic bin pressure-resistant cylinder and a water outlet hole on the upper shell of the probe rod. The water outlet hole on the upper shell of the probe rod is located on the side wall of the shell. There is a gap between the electronic bin pressure-resistant cylinder and the inner wall of the probe rod device, and the gap is a cooling water channel for the probe rod. One end of the cooling water channel for the probe rod is communicated with the docking head of the shell, and the other end of the cooling water channel for the probe rod is communicated with the water outlet hole on the upper shell of the probe rod. 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 beneficial to transporting the low-temperature lake water above the device downward into the cooling water channel of the top of the device, improving the cooling efficiency of the cooling water channel of the probe rod, and ensuring the normal operation of the electronic bin part.

[0009] Preferably, the water outlet hole on the upper housing of the probe rod is located below the pressure-resistant cylinder of the electronic compartment, and the water outlet hole on the upper housing of the probe rod is an inclined hole. The water outlet hole on the upper housing of the probe rod being located below the pressure-resistant cylinder of the electronic compartment is conducive to the cooling water channel of the probe rod surrounding the entire pressure-resistant cylinder of the electronic compartment, increasing the heat exchange area between the pressure-resistant cylinder of the electronic compartment and the cooling water channel of the probe rod, and improving the cooling efficiency; the water outlet hole on the upper housing of the probe rod being an inclined hole enables the cooling water to spray upward after flowing out, reducing the impact on the temperature measurement of the temperature measurement chamber of the rock wall below, and forming an upward water flow, which can not only avoid blocking the mud discharged during the downhole drilling process, but also carry away the debris with larger volume and mass in the mud, preventing the accumulation of debris between the probe rod device and the rock wall during the downhole drilling process of the probe rod device.

[0010] Preferably, the temperature measurement chamber of the rock wall includes a high-temperature resistant pump and a temperature measurement probe. One end of the high-temperature resistant pump is connected to the water inlet hole of the temperature measurement chamber of the rock wall, and a water outlet filter for separating the temperature measurement chamber of the rock wall is provided at the other end of the high-temperature resistant pump. A temperature measurement probe is provided in the chamber of the temperature measurement chamber of the rock wall on the side away from the high-temperature resistant pump of the water outlet filter. The use of a high-temperature resistant pump to actively suck the pore water of the rock wall shortens the sampling time of the pore water of the rock wall and reduces the impact of heat exchange with the outside world on the measurement result after the pore water of the rock wall is exposed; further, the high-temperature resistant pump uses a turbine pump, and the turbine pump can better adapt to the high-temperature and high-pressure environment in the deep layer of the crater lake, can transport gas-liquid mixtures, and withstand the cavitation effect of the gas contained in the pore water of the rock wall on the high-temperature resistant pump.

[0011] Preferably, the temperature measurement chamber of the rock wall is provided with a water outlet hole in the chamber where the temperature measurement probe is located, and the temperature measurement probe is connected to the electronic compartment part by a double-headed watertight cable. The double-headed watertight cable transmits the measurement data of the temperature measurement probe and the borehole temperature measurement module to the electronic compartment, and the double-headed watertight cable can be bent and deformed, and can adapt to the movement of the temperature measurement chamber of the rock wall under the action of the elastic body of the temperature measurement chamber of the rock wall, keeping the temperature measurement chamber of the rock wall close to the rock wall.

[0012] The present invention provides a device for detecting the bottom sediment and deep temperature of a crater lake, which can measure the deep temperature distribution of the crater lake, can measure the temperature of the pore water of the rock wall and the water temperature in the borehole by adhering to the wall; solves the problems of the detection circuit being resistant to high temperature for a long time and being difficult to measure the deep temperature of the crater lake; avoids measurement errors caused by the exchange of external fluids in the borehole; avoids mud blocking the water channel of the temperature measurement chamber of the rock wall, and has the following beneficial effects: avoiding external fluids from entering the temperature measurement chamber of the rock wall, and avoiding heat errors caused by heat exchange of external fluids at the water inlet hole of the temperature measurement chamber of the rock wall; the elastic ring has the ability of plastic deformation and can fit the rock wall under the extrusion of the elastic body of the temperature measurement chamber of the rock wall, isolating external fluids from entering the water inlet hole of the temperature measurement chamber of the rock wall and avoiding interference caused by external fluids entering the device; the water outlet hole on the upper housing of the probe rod is an inclined hole, so that the cooling water can spray upward after flowing out, reducing the impact on the temperature measurement of the temperature measurement chamber of the rock wall below, and avoiding blocking the mud discharged during the downhole drilling process of this device. Description of the Drawings

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings described below are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained by extending the provided drawings.

[0014] Figure 1 Schematic diagram of the working state of the bottom sediment and deep temperature detection device for crater lakes;

[0015] Figure 2 Cross-sectional schematic diagram of the bottom sediment and deep temperature detection device for crater lakes;

[0016] Figure 3 Schematic diagram of the structure of the rock wall temperature measurement bin and its internal structure of the present invention;

[0017] Figure 4 For the present invention Figure 3 Partial enlarged view at M;

[0018] Figure 5 Partial enlarged view at the water outlet hole of the upper shell of the probe rod of the present invention;

[0019] Figure 6 For the present invention Figure 3 Partial enlarged view at N;

[0020] Figure 7 For the present invention Figure 3 Partial enlarged view at K;

[0021] Figure 8 For the present invention Figure 3 Partial enlarged view at L.

[0022] Description of reference numerals: 1 hoisting device; 2 hoisting cable; 3 drilling rig device; 4 bottom sediment; 5 crater lake; 6 bottom sediment and deep temperature detection device of crater lake; 601 taper thread docking head; 602 upper end cover of electronic cabin; 603 pressure-resistant cylinder of electronic cabin; 604 lower end cover of electronic cabin; 605 first heat insulation pad; 606 connecting bolt; 607 thread joint; 608 water-tight socket of electronic cabin; 609 double-headed water-tight cable; 610 water-tight socket at the upper end of rock wall temperature measurement bin; 611 elastomer of rock wall temperature measurement bin; 612 fixing seat of elastomer of rock wall temperature measurement bin; 613 water-permeable material; 614 drilling hole temperature measurement module; 615 water inlet hole of rock wall temperature measurement bin; 616 rock wall temperature measurement bin; 617 rock wall temperature measurement module; 6171 high-temperature resistant pump; 6172 high-temperature resistant pipe; 6173 water outlet filter screen; 6174 temperature measurement cap; 6175 temperature measurement probe; 6176 water outlet hole of rock wall temperature measurement bin; 6177 water inlet filter screen; 6178 cylinder body of rock wall temperature measurement bin; 618 lower housing of probe rod; 619 water outlet hole of upper housing of probe rod; 620 temperature acquisition circuit module; 621 power supply module; 622 fixing bracket; 623 upper housing of probe rod; 624 second heat insulation pad; 625 cooling water channel of probe rod; 626 water-tight socket at the lower end of rock wall temperature measurement bin; 627 water-tight cable of drilling hole temperature measurement module; 628 taper tip of lower housing of probe rod; 629 elastic ring. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment 1

[0025] As Figure 1 shown, the operator operates the shore-based or shipborne hoisting device 1 on the water surface of the crater lake 5 according to the sampling location, and lowers the drilling rig 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 rig device 3 is stable, a 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 drilling rig device 3 is used to vertically lower the assembly formed by the core sampling drill rod and the bottom sediment and deep temperature detection device 6 of the crater lake along the core hole to the deep layer of the crater lake. After reaching the designated position, the temperature of the sediment pore water is measured. During the measurement, the rock wall temperature measurement bin 616 will always fit the rock wall by squeezing the elastic ring 629 under the action of the elastomer 611 of the rock wall temperature measurement bin, and obtain the rock wall pore water from the water inlet hole 615 of the rock wall temperature measurement bin into the rock wall temperature measurement bin 616. After the measurement is completed, the drilling rig device 3 successively withdraws the core sampling drill rod 5 and the bottom sediment and deep temperature detection device 6 of the crater lake into the drilling rig device 3, and the hoisting device recovers the drilling rig device 3 through the hoisting cable 2 near the crater lake 5.

[0026] As shown Figure 2 in the figure, a bottom sediment and deep temperature detection device 6 for a crater lake includes a taper-thread docking head 601, an upper end cover 602 of the electronic bin, a pressure-resistant cylinder 603 of the electronic bin, a lower end cover 604 of the electronic bin, a first heat insulation pad 605, a connecting bolt 606, a threaded joint 607, a water-tight socket 608 of the electronic bin, a double-headed water-tight cable 609, a water-tight socket 610 at the upper end of the rock wall temperature measurement bin, an elastomer 611 of the rock wall temperature measurement bin, a fixing seat 612 for the elastomer of the rock wall temperature measurement bin, a permeable material 613, a borehole temperature measurement module 614, a water inlet hole 615 of the rock wall temperature measurement bin, a rock wall temperature measurement bin 616, a rock wall temperature measurement module 617, a lower housing 618 of the probe rod, a water outlet hole 619 on the upper housing of the probe rod, a temperature acquisition circuit module 620, a power supply module 621, a fixing bracket 622, an upper housing 623 of the probe rod, a second heat insulation pad 624, a cooling water channel 625 of the probe rod, a water-tight socket 626 at the lower end of the rock wall temperature measurement bin, a water-tight cable 627 of the borehole temperature measurement module, a taper tip 628 of the lower housing of the probe rod, and an elastic ring 629. The docking head is connected by a taper-thread docking head 601, and can realize threaded connection with the core drill rod 5 of the drill rig. The rotary docking mechanism of the drill rig device can realize automatic docking.

[0027] As shown Figure 3 in the figure, the rock wall temperature measurement bin 616 includes a high-temperature resistant pump 6171, a high-temperature resistant pipe 6172, a water outlet filter 6173, a temperature measurement cap 6174, a temperature measurement probe 6175, a water outlet hole 6176 of the rock wall temperature measurement bin, a water inlet filter 6177, and a cylinder body 6178 of the rock wall temperature measurement bin. One end of the high-temperature resistant pump 6171 is connected to the water inlet hole 615 of the rock wall temperature measurement bin, and the other end of the high-temperature resistant pump 6171 is provided with a water outlet filter 6173 that separates the rock wall temperature measurement bin 616. The rock wall temperature measurement bin 616 is provided with a temperature measurement probe 6175 in the chamber on the side of the water outlet filter 6173 away from the high-temperature resistant pump 6171. The high-temperature resistant pump 6171 is used to actively suck the pore water of the rock wall, shortening the sampling time of the pore water of the rock wall and reducing the influence of heat exchange between the pore water of the rock wall and the outside world after exposure on the measurement result; further, the high-temperature resistant pump 6171 adopts a turbine pump, and the turbine pump can better adapt to the high-temperature and high-pressure environment in the deep layer of the crater lake, can transport gas-liquid mixture, and withstand the cavitation effect of the gas contained in the pore water of the rock wall on the high-temperature resistant pump 6171.

[0028] As shown Figure 4As shown in the figure, the top of the housing is the electronic compartment part. A first heat insulation pad 605 is provided between the electronic compartment part and the cavity where the rock wall temperature measurement chamber 616 is located. The upper housing 623 of the probe rod and the lower housing 618 of the probe rod are connected by a threaded joint 607. The first heat insulation pad 605 has two through holes passing through the connecting bolts 606. The first heat 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. The watertight socket 608 of the electronic compartment is fixed to the threaded joint 607 by threads.

[0029] The electronic compartment part is arranged at the top, which is convenient for transporting cooling water from the top to cool the electronic compartment part, and avoids 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 measurement chamber 616 is located continuously conducts the temperature measurement cycle of the pore water in the rock wall, the cavity where the rock wall temperature measurement chamber 616 is located is in a high-temperature state. Setting the first heat insulation pad 605 can reduce the influence of the temperature of the cavity where the rock wall temperature measurement chamber 616 is located on the electronic compartment part.

[0030] The electronic compartment part includes an electronic compartment pressure-resistant cylinder 603 and a water outlet hole 619 on the upper housing of the probe rod. The water outlet hole 619 on the upper housing of the probe rod is located on the side wall of the housing. There is a gap between the electronic compartment pressure-resistant cylinder 603 and the inner wall of the probe rod device 6, and the gap is the probe rod cooling water channel 625. One end of the probe rod cooling water channel 625 is communicated with the through hole of the docking head, and the other end of the probe rod cooling water channel 625 is communicated with the water outlet hole 619 on the upper housing of the probe rod. The core sampling drill rod is provided with a through hole, which is communicated with the tapered thread docking head 601 of the device, which is beneficial 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.

[0031] As Figure 5 shown, the water outlet hole 619 on the upper housing of the probe rod is located below the electronic compartment pressure-resistant cylinder 603, and the water outlet hole 619 on the upper housing of the probe rod is an inclined hole. The water outlet hole 619 on the upper housing of the probe rod is located below the electronic compartment pressure-resistant cylinder 603, which is beneficial to the probe rod cooling water channel 625 surrounding the entire electronic compartment pressure-resistant cylinder 603, increasing the heat exchange area between the electronic compartment pressure-resistant cylinder 603 and the probe rod cooling water channel 625, and improving the cooling efficiency. The water outlet hole 619 on the upper housing of the probe rod is an inclined hole, so that the cooling water can spray upward after flowing out, reducing the influence on the temperature measurement of the rock wall temperature measurement chamber 616 below, and forming an upward water flow, which can not only avoid blocking the mud discharged during the downhole drilling process, but also accumulate in the gap between the probe rod device 6 and the rock wall. It can carry away the debris with larger volume and mass in the mud, and avoid the accumulation of debris during the downhole drilling process of the probe rod device 6

[0032] As Figure 6As shown, the rock wall temperature measurement bin 616 is provided with a water outlet hole 6176 for the rock wall temperature measurement bin in the chamber where the temperature measurement probe 6175 is located. The temperature measurement probe 6175 is connected to the electronic bin part by a double-headed watertight cable 609. The double-headed watertight cable 609 transmits the measurement data of the temperature measurement probe 6175 and the borehole temperature measurement module 614 to the electronic bin, and the double-headed watertight cable 609 can be bent and deformed, and can adapt to the movement of the rock wall temperature measurement bin 616 under the action of the rock wall temperature measurement bin elastomer 611, so as to keep the rock wall temperature measurement bin 616 closely attached to the rock wall.

[0033] As Figure 7 As shown, the middle part of the housing has an opening. A rock wall temperature measurement bin 616 is provided in the middle cavity of the housing. One side of the rock wall temperature measurement bin 616 is an opening, and the other side of the rock wall temperature measurement cavity is a rock wall temperature measurement bin elastomer 611, and the rock wall temperature measurement bin elastomer 611 is connected to the housing. In this embodiment, the rock wall temperature measurement bin elastomer fixing seat 612 is fixed to the inner wall of the lower housing 618 of the probe rod by screws. Three rock wall temperature measurement bin elastomers 611 connect the rock wall temperature measurement bin 616 and the rock wall temperature measurement bin elastomer fixing seat 612. The side wall of the lower housing 618 of the probe rod has an opening, and the rock wall temperature measurement bin 616 is ejected outward by the rock wall temperature measurement bin elastomer 611, and the rock wall temperature measurement bin 616 exposes the opening on the side wall of the lower housing 618 of the probe rod.

[0034] Through the above settings, the middle part of the housing has an opening and is provided with a rock wall temperature measurement bin 616, which can measure the temperature of the pore water in the rock wall by adhering to the wall; one side of the rock wall temperature measurement bin 616 is an opening, and the other side is a rock wall temperature measurement bin elastomer 611, so that the rock wall temperature measurement bin 616 can always be closely attached to the rock wall at the opening, avoiding that the rock wall temperature measurement bin 616 cannot be reset after being pushed away by the protruding rock wall due to the unevenness of the rock wall, resulting in the rock wall temperature measurement bin 616 not being able to closely adhere to the rock wall, resulting in errors in measuring the temperature of the pore water in the rock wall, and avoiding the lake water at other positions from entering the rock wall temperature measurement bin 616, and the heat exchange at the water inlet hole 615 of the rock wall temperature measurement bin causes heat errors.

[0035] As Figure 7As shown in the figure, a rock wall temperature measurement chamber 616 is provided with a rock wall temperature measurement chamber water inlet hole 615 near the opening side. An elastic ring 629 is arranged around the outside of the rock wall temperature measurement chamber water inlet hole 615. When the elastic body 611 of the rock wall temperature measurement chamber extends, the elastic ring 629 is located outside the housing. Since the outer housing of the rock wall temperature measurement chamber 616 is a rigid structure and it is difficult to fully fit the rugged rock wall, an elastic ring 629 is arranged around the outside of the rock wall temperature measurement chamber water inlet hole 615. The elastic ring 629 has the ability of plastic deformation and can fit the rock wall under the extrusion of the elastic body 611 of the rock wall temperature measurement chamber, isolating the outside fluid from entering the rock wall temperature measurement chamber water inlet hole 615, avoiding the interference caused by the outside fluid entering from other positions, and improving the measurement accuracy of the rock wall pore water; the elastic ring 629 replaces the direct contact between the rock wall temperature measurement chamber 616 and the rock wall, avoiding the friction between the rock wall temperature measurement chamber 616 and the rock wall during the overall downhole drilling process of the device, and the gap between the device and the rock wall formed by the elastic ring 629 is beneficial to the discharge of the mud generated during the downhole drilling process of the device along the gap.

[0036] The outer ring thickness of the elastic ring 629 is greater than the inner ring thickness of the elastic ring 629. The outer ring thickness of the elastic ring 629 being greater than the inner ring thickness is beneficial to forming a drainage inclination angle for the rapid entry of the rock wall pore water into the rock wall temperature measurement chamber 616, facilitating the timely measurement of the rock wall pore water by the rock wall temperature measurement chamber 616, and avoiding the change in temperature due to the heat exchange between the exposed rock wall pore water and the outside fluid; under the extrusion of the rock wall temperature measurement chamber 616 and the rock wall, the outer ring thickness of the elastic ring 629 is thicker and there is a thickness difference with the inner ring, making the outer ring of the elastic ring 629 more likely to undergo elastic deformation, capable of forming a larger sealing surface between the rock wall and the water inlet hole 615 of the rock wall temperature measurement chamber 616 after extrusion, improving the sealing performance of the rock wall temperature measurement chamber 616 of the rock wall, and avoiding the outside fluid from entering the rock wall temperature measurement chamber water inlet hole 615.

[0037] As Figure 8 shown in the figure, the bottom of the housing is the borehole temperature measurement part. The borehole temperature measurement part includes a probe lower housing tip 628 and a borehole temperature measurement module 614. The probe lower housing tip 628 is located at the end of the housing; along the downhole direction of the core sampling drill pipe, the borehole temperature measurement module 614 is located behind the probe lower housing tip 628 and closely adheres to the probe lower housing 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 at the bottom of the lower probe. The borehole temperature measurement module 614 is fixed to the probe lower housing 618 by threads and is covered by the permeable material 613. The probe lower housing tip 628 is fixed to the bottom of the probe lower housing 618 by threads.

[0038] With the above settings, the borehole temperature measurement module 614 is located behind the tip 628 of the lower housing of the probe rod and closely adheres to the tip 628 of the lower housing of the probe rod, enabling timely measurement of the temperature of the fluid in the borehole during the downward drilling of the probe rod, and avoiding measurement errors caused by the entry of the upper lake water and heat exchange with the fluid in the borehole; the borehole temperature measurement module 614 is connected to the rock wall temperature measurement chamber 616 by the water-tight cable 627 of the borehole temperature measurement module, and the measurement results are transmitted to the electronic chamber part with the rock wall temperature measurement chamber 616 as a relay. In addition, the water-tight cable 627 of the borehole temperature measurement module can be bent and deformed, avoiding restricting the freedom of movement of the rock wall temperature measurement chamber 616, and being able to adapt to the movement of the rock wall temperature measurement chamber 616 under the action of the elastomer 611 of the rock wall temperature measurement chamber, and keeping the rock wall temperature measurement chamber 616 closely adhered to the rock wall.

[0039] The present invention provides a device for detecting the bottom sediment and deep temperature of a crater lake, which can measure the deep temperature distribution of the crater lake, can measure the temperature of the pore water in the rock wall and the water temperature in the borehole by adhering to the wall; solves the problems that the detection circuit is resistant to high temperature for a long time and it is difficult to measure the deep temperature of the crater lake; avoids measurement errors caused by the exchange of lake water in the borehole; avoids mud blocking the water channel of the rock wall temperature measurement chamber 616, and has the following beneficial effects: avoiding the entry of lake water from other positions into the rock wall temperature measurement chamber 616 and heat error caused by heat exchange at the water inlet hole 615 of the rock wall temperature measurement chamber; the elastic ring 629 has the ability of plastic deformation and can fit the rock wall under the extrusion of the elastomer 611 of the rock wall temperature measurement chamber, isolating the entry of external fluid into the water inlet hole 615 of the rock wall temperature measurement chamber and avoiding interference caused by the entry of external fluid from other positions into the device; the water outlet hole 619 of the upper housing of the probe rod is an inclined hole, so that the cooling water can be ejected upward after flowing out, reducing the influence on the temperature measurement of the lower rock wall temperature measurement chamber 616 and avoiding blocking the mud discharged during the downward drilling of the device.

[0040] The above embodiments and / or implementation manners are only used to illustrate the preferred embodiments and / or implementation manners for realizing the technology of the present invention, and do not impose any form of limitation on the implementation manners of the technology of the present invention. Any person skilled in the art, without departing from the scope of the technical means disclosed in the content of the present invention, may make some changes to other equivalent embodiments, but should still be regarded as the same technology or embodiment as the present invention in essence.

Claims

1. An apparatus for detecting bottom sediments and deep temperatures of a crater lake, comprising a housing and a rock wall temperature measuring chamber (616), characterized in that, Above the said housing, there is a docking head. In the middle of the housing, there is an opening. Inside the cavity in the middle of the housing, there is a rock wall temperature measurement chamber (616). One side of the rock wall temperature measurement chamber (616) is the opening, and the other side of the rock wall temperature measurement chamber (616) is the rock wall temperature measurement chamber elastomer (611). The rock wall temperature measurement chamber elastomer (611) is connected to the housing; The top of the housing is the electronic chamber part, which includes an electronic chamber pressure-resistant cylinder (603) and a water outlet hole (619) on the upper housing of the probe rod. The water outlet hole (619) on the upper housing of the probe rod is located on the side wall of the housing. There is a gap between the electronic chamber pressure-resistant cylinder (603) and the inner wall of the probe rod device, and this gap is the probe rod cooling water channel (625). One end of the probe rod cooling water channel (625) is communicated with the docking head, and the other end of the probe rod cooling water channel (625) is communicated with the water outlet hole (619) on the upper housing of the probe rod.

2. The bottom sediment and deep temperature detection device for a crater lake according to claim 1, characterized in that, The bottom of the housing is the borehole temperature measurement part, which includes a taper tip (628) of the lower housing of the probe rod and a borehole temperature measurement module (614). The taper tip (628) of the lower housing of the probe rod is located at the end of the housing; the downward drilling direction of the core sampling drill rod (5) is forward. The borehole temperature measurement module (614) is located behind the taper tip (628) of the lower housing of the probe rod and closely adheres to the taper tip (628) of the lower housing of the probe rod. The borehole temperature measurement part also includes a water-tight cable (627) of the borehole temperature measurement module. The borehole temperature measurement module (614) is connected to the rock wall temperature measurement chamber (616) by using the water-tight cable (627) of the borehole temperature measurement module.

3. The bottom sediment and deep temperature detection device for a crater lake according to claim 1, characterized in that On the side of the rock wall temperature measurement chamber (616) close to the opening, there is a water inlet hole (615) of the rock wall temperature measurement chamber. One end of the water inlet hole (615) of the rock wall temperature measurement chamber close to the outside is surrounded by an elastic ring (629). When the rock wall temperature measurement chamber elastomer (611) extends, the elastic ring (629) is located outside the housing.

4. The bottom sediment and deep temperature detection device for 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 for a crater lake according to claim 3, characterized in that A first heat insulation pad (605) is provided between the electronic chamber part and the cavity where the rock wall temperature measurement chamber (616) is located.

6. The bottom sediment and deep temperature detection device for a crater lake according to claim 1, characterized in that The water outlet hole (619) on the upper housing of the probe rod is located below the electronic chamber pressure-resistant cylinder (603), and the water outlet hole (619) on the upper housing of the probe rod is an inclined hole.

7. The bottom sediment and deep temperature detection device for a crater lake according to claim 5, characterized in that, The rock wall temperature measurement chamber (616) includes a high-temperature resistant pump (6171) and a temperature measurement probe (6175). One end of the high-temperature resistant pump (6171) is connected to the water inlet hole (615) of the rock wall temperature measurement chamber. The other end of the high-temperature resistant pump (6171) is provided with a water outlet filter screen (6173) that separates the rock wall temperature measurement chamber (616). The temperature measurement probe (6175) is provided in the chamber of the rock wall temperature measurement chamber (616) on the side away from the high-temperature resistant pump (6171) of the water outlet filter screen (6173).

8. The bottom sediment and deep temperature detection device for a crater lake according to claim 7, characterized in that, The rock wall temperature measurement chamber (616) is provided with a water outlet hole (6176) in the chamber where the temperature measurement probe (6175) is located. The temperature measurement probe (6175) is connected to the electronic chamber part by using a double-headed water-tight cable (609).

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