A survey device for geological and rock conditions

Abstract

The present invention provides a survey device for geological and rock conditions, comprising a driving rod and a coring barrel, the coring barrel comprising a cylindrical body, a cutting head and a wrapping assembly, the wrapping assembly comprising a first air channel, a guide rod, a first partition and a second partition arranged at intervals along the axial direction of the cylindrical body, and a cylindrical elastic bag film sleeved on the first partition, the first partition and the second partition are both sealed and connected at the end of the guide rod extending into the cylindrical body, one end of the cylindrical elastic bag film is sealed and fixed to the edge of the second partition to form a first air chamber between the first partition, the second partition and the cylindrical elastic bag film; the guide rod is provided with a first vent connected to the first air chamber, and a second air channel connected to the first vent and the first air channel is provided in the guide rod. By arranging the wrapping assembly, the cylindrical elastic bag film can be wrapped downwardly around the periphery of the core through the wrapping assembly when drilling the core, thereby achieving the effect of wrapping the core and ensuring the complete extraction of the loose core.

Description

Technical Field

[0001] The present invention generally relates to the field of geological survey technology, and in particular to a survey device for geological and rock conditions. Background Art

[0002] Geological survey is a general term for geological mapping, exploration, indoor experiments, in-situ testing and other work carried out to study and evaluate the engineering geological conditions of the construction site. Geological survey is a geological investigation and research work carried out to identify the geological factors that affect engineering buildings. The geological factors that need to be surveyed include geological structure or geological structure. The commonly used geological survey method is to drill holes in the soil layer through relevant equipment, and then take out the core. Through the analysis of the core, the distribution of rock layers in the soil layer at the current location is obtained to obtain the rock and soil conditions in the soil layer. At present, the extraction of cores generally uses core tubes for drilling. The core is drilled in the core tube to form a core, and then the core is taken out through the core tube. This method can effectively remove the core with a complete structure. For some loosely structured cores, the core is very easy to peel off and loosen when it is taken out, and the core cannot be completely and effectively taken out. Summary of the invention

[0003] In view of the above problems, the present application provides a survey device for geological and geotechnical conditions to solve the technical problems raised in the background technology.

[0004] The present invention provides a survey device for geological and geotechnical conditions, including a driving rod and a coring barrel, wherein the coring barrel includes a cylindrical body arranged at the end of the driving rod, a cutting head arranged at one end of the cylindrical body away from the driving rod, and a wrapping assembly arranged inside the cylindrical body, wherein the wrapping assembly includes a first air channel formed in the driving rod, a guide rod arranged in the first air channel, a first baffle and a second baffle arranged in a circular shape in the cylindrical body along the axial direction of the cylindrical body, and a cylindrical elastic bag film sleeved on the first baffle, the first baffle and the second baffle are both sealed and connected at the end of the guide rod extending into the cylindrical body, and one end of the cylindrical elastic bag film is sealed and fixed to the edge of the second baffle to form a first air chamber between the first baffle, the second baffle and the cylindrical elastic bag film; the guide rod is provided with a first vent connected to the first air chamber, and a second air channel connected to the first vent and the first air channel is provided in the guide rod.

[0005] Furthermore, the first partition and the second partition are both coaxially arranged with the cylindrical body, and the radius of the second partition is smaller than the radius of the first partition, and a through gap is arranged between the circumferential side wall of the first partition and the inner wall of the cylindrical body, and the through gap has a dimension D1 along the radial direction of the first partition, and the wall thickness of the cylindrical elastic bag film is D2, wherein D1≤D2.

[0006] Furthermore, the first air passage is coaxially arranged with the cylindrical body, and the end of the guide rod extending into the first air passage is expanded outwardly and provided with a step portion.

[0007] Furthermore, an end plate is detachably connected to the end of the cylindrical body, and the end plate is detachably connected to the driving rod.

[0008] Furthermore, the cutting head includes a connecting tube and a cutting blade which are detachably connected to the cylindrical body, and an annular boss is extended inward from the end of the connecting tube away from the cylindrical body, the inner diameter of the annular boss is smaller than the radius of the second partition plate, the end face of the annular boss is in the same plane as the end face of the connecting tube, and the cutting blade is arranged on the end face of the annular boss and the end face of the connecting tube.

[0009] Furthermore, the cutting blade includes a plurality of strip-shaped cutting pieces evenly spaced around the axis of the connecting tube, one end of the strip-shaped cutting piece is flush with the inner circumferential surface of the annular boss, and the other end extends out of the end surface of the connecting tube.

[0010] Furthermore, the strip-shaped cutting element is arranged to be inclined from one end to the other end in a first direction, and the first direction is a direction opposite to the rotation direction of the cutting head when it is working.

[0011] Furthermore, the outer peripheral surface of the connecting tube is provided with supporting ribs which are arranged in one-to-one correspondence with the strip-shaped cutting pieces.

[0012] Furthermore, the connecting tube is provided with a mounting groove on the side of the annular boss away from the cutting blade, the mounting groove is coaxially arranged with the connecting tube, a guide tube is rotatably arranged in the mounting groove, the inner diameter of the guide tube is equal to the inner diameter of the annular step, and the guide tube is spaced apart from the inner side surface of the cylindrical body.

[0013] Furthermore, a side of the guide cylinder facing the cylindrical body is an arcuate surface, a plurality of rotating shafts are arranged on the arcuate surface, a working surface coaxially arranged therewith is also arranged on the rotating shaft, a needle is arranged on the working surface, the plurality of rotating shafts are evenly spaced around the axis of the guide cylinder, and the rotating shafts are all perpendicular to the axis of the guide cylinder.

[0014] Furthermore, a mounting groove is arranged on the arc surface, the rotating shaft is rotatably arranged in the mounting groove, and the mounting groove is not exposed on the working surface, and the needle can partially extend out of the mounting groove.

[0015] Furthermore, the side wall of the cylindrical elastic bag film includes a waterproof inner layer, a waterproof outer layer and a water-absorbing and expanding layer arranged between the waterproof inner layer and the waterproof outer layer, a plurality of channels are evenly arranged on the waterproof outer layer, an elastic film is arranged at one end of the channel close to the water-absorbing and expanding layer, and the elastic coefficient θ1 of the waterproof outer layer is smaller than the elastic coefficient θ2 of the waterproof inner layer.

[0016] Furthermore, a connecting portion is provided between the waterproof outer layer and the waterproof inner layer, and the waterproof outer layer and the waterproof inner layer are evenly divided into a plurality of mutually unconnected accommodating cavities by the connecting portion, each of the accommodating cavities is filled with the water-absorbing expansion layer, and each of the accommodating cavities is correspondingly provided with at least one of the channels.

[0017] Furthermore, it also includes an air supply device connected to the first air duct and a control device connected to the air supply device, at least one of the rotating shafts is equipped with a speed sensor, the control device is wirelessly connected to the speed sensor, and the control device can control the air supply pressure of the air supply device according to the detection value of the speed sensor.

[0018] Furthermore, the length of the needle exposed from the working surface is less than the thickness of the waterproof inner layer.

[0019] The present invention provides a survey device for geological and rock conditions. By arranging a wrapping component in a coring barrel, a cylindrical elastic bag membrane can be wrapped downwardly around the periphery of the core through the wrapping component when the core is drilled, thereby achieving the effect of wrapping the core and ensuring the complete extraction of the loose core. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0021] Figure 1 A schematic diagram of the external structure of a coring barrel in a geological and rock-soil survey device provided by the present invention.

[0022] Figure 2 A schematic diagram of the cross-sectional structure of a coring barrel in a geological and rock-soil survey device provided by the present invention.

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure at AA in a survey device for geological and rock conditions provided by the present invention.

[0024] Figure 4 This is a schematic diagram of the partially enlarged structure of location B in a survey device for geological and rock conditions provided by the present invention.

[0025] Figure 5This is a schematic diagram of the partially enlarged structure of position C in a survey device for geological and rock conditions provided by the present invention.

[0026] Figure 6 It is a schematic diagram of the local enlarged structure at D when the side wall of the cylindrical elastic bag film in the geological and rock conditions survey device provided by the present invention is not squeezed.

[0027] Figure 7 A schematic diagram of the partially enlarged structure of a side wall of a cylindrical elastic bag membrane at position D when being squeezed in a geological and rock-soil survey device provided by the present invention.

[0028] Figure 8 A schematic structural diagram of a survey device for geological and rock conditions provided by the present invention. DETAILED DESCRIPTION

[0029] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Embodiment 1

[0032] It should be noted that the exploration device provided by the present invention is basically the same as the device structure and working method commonly used in the field, and also includes a frame (not shown in the figure). A driving motor is arranged on the frame, and the driving motor drives the driving rod 2 to rotate around its axial direction, and at the same time the frame can provide the driving rod with vertical downward movement, so that the driving rod drives the coring barrel to rotate, and the bottom surface is drilled by the cutting head 11, so that a core is gradually formed in the coring barrel, and after drilling a certain length of the core, the coring barrel is pulled out vertically upward, so that the core can be obtained. In the prior art, a clamping device is often arranged in the coring barrel, and the core is clamped by the clamping device, so that the core can be taken out together with the coring barrel, but this method cannot effectively take out the core when the structure of the core is loose. In view of this problem, the present invention provides an exploration device for geological and rock conditions. As a specific implementation method, reference is made to Figure 1 , Figure 2The exploration device includes a driving rod 2 and a coring barrel 1, wherein the coring barrel 1 includes a cylindrical body 10 disposed at the end of the driving rod 2, a cutting head 11 disposed at an end of the cylindrical body 10 away from the driving rod 2, and a wrapping assembly 12 disposed inside the cylindrical body 10, wherein the wrapping assembly 12 includes a first air passage 120 formed along the driving rod, a guide rod 121 disposed in the first air passage 120, a first baffle 122 and a second baffle 124 disposed in a circular shape in the cylindrical body at intervals along the axial direction of the cylindrical body, and a first baffle 122 and a second baffle 124 disposed in a circular shape in ... The cylindrical elastic bag membrane 123 on the guide rod 122, the first partition 122 and the second partition 124 are both sealed and connected at the end of the guide rod 121 extending into the cylindrical body, one end of the cylindrical elastic bag membrane 123 is sealed and fixed to the edge of the second partition 124 to form a first air chamber 12a between the first partition, the second partition and the cylindrical elastic bag membrane 123; the guide rod 121 is provided with a first air vent 1210 connected to the first air chamber, and the guide rod 121 is provided with a second air duct 1211 connecting the first air vent 1210 and the first air duct 120.

[0033] Specifically, refer to Figure 8 The present invention configures a wrapping assembly 12 on the coring barrel 1, so that the wrapping assembly 12 works while the core is being drilled by the coring barrel. The wrapping assembly 12 can sheath a cylindrical elastic bag film 123 around the drilled core, and wrap the core under the tension of the cylindrical elastic bag film 123, thereby avoiding the technical problem that the core is difficult to take out due to looseness. The specific working method of the wrapping assembly is: when in use, refer to Figure 1 , Figure 2 , Figure 6When in use, the coring barrel is driven to rotate and drill the core, and the first air channel 120 is connected to the air supply system 4, and a certain pressure of air is supplied to the first air channel 120 through the air supply system. Under the action of the air pressure, the guide rod 121 can be pushed to slide when the second partition plate abuts against the end of the core. At this time, there is air with a certain pressure in the first air chamber 12a. During drilling, the length of the core extending into the coring barrel body gradually increases as the core is drilled, and the core pushes the guide rod 121 to slide upward. Since the cylindrical elastic bag membrane 123 is sleeved on the first partition plate 122 and one end is fixed on the second partition plate 124, the cylindrical elastic bag membrane 123 can be relative to the first partition plate. Sliding, so under the action of air pressure, the cylindrical elastic bag membrane 123 can be pushed downward to wrap around the periphery of the core, thereby achieving the effect of wrapping the core, and the first partition plate and the second partition plate can rotate around their axes in the cylindrical body. As a specific implementation method, the first air channel is set as a circular channel coaxially arranged with the cylindrical body, and the guide rod is set as a circular rod. The first partition plate and the second partition plate are both set on the guide rod 121 by welding, thereby achieving the function that the first partition plate and the second partition plate can rotate around their axes in the cylindrical body. Of course, it can be understood that the first partition plate and the second partition plate can also be rotatably connected with the guide rod.

[0034] Further, refer to Figure 2 As a preferred embodiment, the first partition 122 and the second partition 124 are both coaxially arranged with the cylindrical body 10, and the radius of the second partition is smaller than the radius of the first partition, and a through gap 1220 is arranged between the circumferential side wall of the first partition 122 and the inner wall of the cylindrical body 10, and the through gap has a dimension D1 along the radial direction of the first partition 123, and the wall thickness of the cylindrical elastic bag film 123 is D2, wherein D1≤D2. Specifically, it can be understood that since the cylindrical elastic bag membrane 123 is pushed by gas pressure and sleeved on the periphery of the core, the sealing between the cylindrical elastic bag membrane 123 and the circumferential surface of the first partition is particularly important. By setting D1≤D2, it can be ensured that the cylindrical elastic bag membrane 123 and the first partition can be effectively sealed. In addition, the radius of the second partition is set to be smaller than the radius of the first partition, so that the gap between the second partition and the inner wall of the cylindrical body is larger than the thickness of the cylindrical elastic bag membrane 123, which can prevent the cylindrical elastic bag membrane 123 from passing through the second partition smoothly and reduce resistance. As a preferred embodiment, the difference between the radius of the second partition and the radius of the inner cylinder of the cylindrical body is greater than 1.5D2.

[0035] Furthermore, as a preferred embodiment, it can be understood that when a certain pressure of gas is introduced into the first air chamber 12a, the gas has the pressure to push the cylindrical elastic bag film 123 away from the circumferential side of the first partition 122, and squeezes the side wall of the cylindrical elastic bag film 123 under the action of pressure. In theory, if the value of D1 is set small enough, the side wall of the cylindrical elastic bag film 123 can be effectively limited to prevent gas from overflowing from the circumferential side of the first partition. However, if the size D1 is set small enough, it is not conducive to the cylindrical elastic bag film 123 passing between the first partition and the inner cylinder surface of the cylindrical body, thereby being not conducive to the wrapping of the core. In order to ensure the cylindrical In order to improve the sealing effect between the cylindrical elastic bag membrane 123 and the first partition, and to avoid excessive friction between the cylindrical membrane bag 123 and the inner surface of the cylindrical body, the following limitations are made, wherein the inner diameter of the cylindrical elastic bag membrane 123 in a free state is r3, the radius of the first partition is r1, the radius of the second partition is r2, the radius of the columnar core column drilled by the core barrel 1 is r4, r3=(0.7-0.9)r4, r2=(1.05-1.2)r3, wherein when the value range of r4 is below 50 mm, r3=(0.7-0.8)r4, and when r4 is greater than 50 mm, r3=(0.8-0.9)r4.

[0036] Preferably, D1=(0.75-0.9)D2, where the shrinkage coefficient of the side wall of the tubular elastic bag film is α, the relationship coefficient γ ranges from 0.57 to 2.35, and the radius of the inner tube of the tubular body is r5, then D1=D2-γ*α(r1-r3). This limitation can be guaranteed.

[0037] Further, as a preferred embodiment, refer to Figure 2 The first air channel 120 is coaxially arranged with the cylindrical body 10, and the end of the guide rod 121 extending into the first air channel 120 is expanded outward and is provided with a step portion 1212. Specifically, by providing the step portion 1212, a sliding seal is formed between the circumferential side of the step portion 1212 and the first air channel 120, thereby reducing the friction between the guide rod 121 and the first air channel, and a limit can be formed by the step portion 1212 to avoid excessive extension of the guide rod under the action of air pressure.

[0038] Further, as a preferred embodiment, refer to Figure 2 The end of the cylindrical body is detachably connected to an end plate 101, and the end plate 101 is detachably connected to the driving rod 2.

[0039] Specifically, as a specific implementation mode, the end plate 101 is connected to the cylindrical body by threads, and the driving rod is detachably fixedly connected to the end plate by fixing bolts. This arrangement facilitates the installation and disassembly of the wrapping assembly 12.

[0040] Further, as a preferred embodiment, refer to Figure 3 The cutting head 11 includes a connecting tube 110 and a cutting blade 111 which are detachably connected to the cylindrical body 10. The end of the connecting tube 110 away from the cylindrical body 10 is provided with an annular boss 112 extending inwardly. The inner diameter of the annular boss 112 is smaller than the radius of the second partition plate. The end face of the annular boss 112 is in the same plane as the end face of the connecting tube 110. The cutting blade 111 is provided on the end face of the annular boss and the end face of the connecting tube. Specifically, by providing the annular step 112 and providing the cutting blade 111 on the annular step 112, the diameter of the drilled core is smaller than the diameter of the cylindrical body 10, so that it is easier for the cylindrical elastic bag film 123 to wrap around the periphery of the core.

[0041] Further, as a preferred embodiment, refer to Figure 3 The cutting blade 111 includes a plurality of strip-shaped cutting pieces 1110 evenly spaced around the axis of the connecting tube, one end of the strip-shaped cutting piece 1110 is flush with the inner circumferential surface of the annular boss 112 , and the other end extends out of the end surface of the connecting tube 110 .

[0042] Furthermore, the strip-shaped cutting member 1110 is arranged to be inclined from one end to the other end in a first direction, and the first direction is a direction opposite to the rotation direction 9 of the cutting head when it is working.

[0043] Specifically, it can be understood that when drilling the core through the coring barrel, an annular cavity coaxially arranged with the core can be drilled on the ground, and by making one end of the strip cutting piece 1110 flush with the inner circumferential surface of the annular boss 112 and the other end extending out of the end surface of the connecting barrel 110, the outer diameter of the annular cavity drilled by the coring barrel 1 can be larger than the outer diameter of the cylindrical body, and the strip cutting piece 1110 is arranged to be inclined in a first direction from one end to the other end, so that when the coring barrel rotates to drill the core, the cut rock debris can be discharged outwardly through the strip cutting piece 1110, thereby reducing the phenomenon of damage to the cutting piece 1110 due to rock debris accumulation, and also reducing the amount of rock debris entering the cylindrical body through the core and the annular step 112, thereby ensuring the effect of the wrapping assembly in wrapping the core.

[0044] Further, as a preferred embodiment, refer to Figure 2 The outer peripheral surface of the connecting tube 110 is provided with supporting ribs 1101 which are arranged one by one corresponding to the strip-shaped cutting piece 1110. The strip-shaped cutting piece 1110 is supported by providing the supporting ribs to improve the rigidity.

[0045] Embodiment 2

[0046] The present invention provides a survey device for geological and rock conditions, as a specific implementation method, as a further improvement, refer to Figure 4 The difference between it and the first embodiment is that the connecting tube 110 is provided with a mounting groove 1102 on the side of the annular boss 112 away from the cutting blade 111, the mounting groove is coaxially arranged with the connecting tube, a guide tube 1120 is rotatably arranged in the mounting groove, the inner diameter of the guide tube 1120 is equal to the inner diameter of the annular step 112, and the guide tube is spaced apart from the inner side surface of the cylindrical body.

[0047] Specifically, by providing an annular guide cylinder 1120, before drilling the core, gas is first introduced through the first air channel 120 to push the guide rod 121 to slide, and the second baffle abuts against the end of the annular guide cylinder 1120, continuously increasing the gas pressure. Under the action of the gas pressure, the cylindrical elastic bag membrane 123 is pushed into between the guide cylinder and the cylindrical body, so that the cylindrical elastic bag membrane 123 is sleeved on the outer circumference of the guide cylinder, and then the core is drilled by driving the coring cylinder to rotate. The core is guided into the cylindrical body through the inner circumference of the guide cylinder and pushes the second baffle to gradually move upward. At this time, the second baffle cylinder and the core rotate synchronously. Since the cylindrical elastic bag membrane 123 is sleeved on the periphery of the guide cylinder, the guide cylinder also rotates synchronously with the core. As the length of the core drilled by the rock increases, the core is gradually passed. The core is then pulled into the tubular body through the guide cylinder. Since the tubular elastic bag membrane 123 is sleeved on the periphery of the guide cylinder, the tubular elastic bag membrane 123 is easier to sleeve on the periphery of the core, and as the core grows, the tubular elastic bag membrane 123 can be pulled to slide relative to the side of the guide cylinder facing the inner wall of the tubular body, and under the action of air pressure, the tubular elastic bag membrane 123 is pushed to slide downward between the first partition plate and the inner wall of the tubular body, and the tubular elastic bag membrane 123 is always sleeved on the guide cylinder; it can be understood that during the process of drilling the core, the tubular elastic bag membrane 123 rotates synchronously with the core. At this time, the tubular elastic bag membrane 123 and the inner wall of the tubular body will slide relative to each other in the circumferential direction, and there is a risk of damaging the tubular elastic bag membrane 123. In order to solve this problem, refer to Figure 2 As a preferred embodiment, a bushing 125 is coaxially slidably provided on the inner side of the cylindrical body. By providing the bushing 125, the bushing and the cylindrical elastic bag membrane 123 rotate synchronously, thereby reducing the risk of the cylindrical elastic bag membrane 123 rupture.

[0048] Further, refer to Figure 2 , Figure 5As a preferred embodiment, the side wall of the cylindrical elastic bag film 123 includes a waterproof inner layer 123a, a waterproof outer layer 123b and a water-absorbing and expanding layer 123c arranged between the waterproof inner layer 123a and the waterproof outer layer 123b, a plurality of channels 1230 are evenly arranged on the waterproof outer layer 123b, an elastic film 1231 is arranged at one end of the channel 1230 close to the water-absorbing and expanding layer 123c, an elastic coefficient θ1 of the waterproof outer layer 123b is smaller than the elastic coefficient θ2 of the waterproof inner layer 123a, a side of the guide cylinder facing the cylindrical body is an arc surface, a plurality of rotating shafts 31 are arranged on the arc surface, a working surface 32 coaxially arranged therewith is also arranged on the rotating shaft 31, a needle 33 is arranged on the working surface, a plurality of the rotating shafts are evenly spaced around the axis of the guide cylinder 1120, and the rotating shafts are all perpendicular to the axis of the guide cylinder 1120.

[0049] Specifically, it can be understood that water will be added when drilling the core, so a large amount of water will adhere to the surface of the drilled core. In order to ensure the wrapping of the core by the cylindrical elastic bag film 123, as a preferred embodiment, the cylindrical elastic bag film 123 is configured to include a waterproof inner layer 123a, a waterproof outer layer 123b and a water-absorbing expansion layer 123c arranged between the waterproof inner layer 123a and the waterproof outer layer 123b, wherein the waterproof inner layer 123a is the inner layer of the cylindrical elastic bag film 123 before being sleeved on the core, and the side wall of the cylindrical elastic bag film 123 is turned over after being sleeved on the periphery of the core, and the waterproof outer layer 123b contacts the surface of the core, and the waterproof inner layer is located at the bottom of the core. As for the outermost layer of the core, when the cylindrical elastic bag membrane 123 is sleeved on the periphery of the core, the waterproof outer layer 123b of the cylindrical elastic bag membrane 123 will slide relative to the arc surface, so that the waterproof outer layer 123b contacts the needles on the working surface 3, and the needles can pierce the waterproof outer layer 123b. Therefore, after being sleeved on the core, the water on the core can pass through the waterproof outer layer into the water-absorbing and expanding layer 123c, causing the water-absorbing and expanding layer 123c to expand, and the elastic coefficient θ1 of the waterproof outer layer 123b is smaller than the elastic coefficient θ2 of the waterproof inner layer 123a, so that the deformation of the waterproof inner layer is smaller than the deformation of the waterproof outer layer, thereby providing a greater wrapping force for the core.

[0050] After taking out a suitable length of the core, the coring barrel is lifted upward. Since the cylindrical elastic bag membrane 123 expands, the core will not pass through the guide cylinder 1120, and the guide cylinder can limit the core. After the coring barrel is taken out of the ground, the cutting head 11 is removed, and the guide cylinder 1120 and the cutting head are removed together. The core falls under the action of gravity and pulls the second partition to fall together. After the core falls completely, the cylindrical elastic bag membrane 123 at both ends of the core is cut off to obtain a complete core. Then the ends of the cylindrical elastic bag membrane 123 are fixed on the second partition again, and the sampling head is installed to sample the core again.

[0051] Further, as a preferred embodiment, refer to Figure 5 The arc surface is provided with a mounting groove 34, the rotating shaft 31 is rotatably arranged in the mounting groove, and the working surface 32 does not expose the mounting groove 34, and the pricking needle can partially extend out of the mounting groove. This arrangement enables the side wall of the tubular elastic bag film 123 to be better attached to the arc surface under the action of air pressure, so that the pricking needle can evenly pierce the waterproof outer layer. As a specific embodiment, the waterproof outer layer and the waterproof inner layer can be made of commonly used materials such as rubber and plastic, as long as they can achieve the purpose of the present invention, and the material of the water-absorbing and swelling layer is water-absorbing and swelling rubber.

[0052] Example 3

[0053] The present invention provides a survey device for geological and rock conditions, as a specific implementation method, as a further improvement, refer to Figure 5-Figure 7 The difference between the embodiment 1 and the second embodiment is that a connecting portion 1232 is provided between the waterproof outer layer and the waterproof inner layer, and the waterproof outer layer and the waterproof inner layer are evenly divided into a plurality of mutually unconnected accommodating cavities 1223 by the connecting portion 1232, each of the accommodating cavities is filled with the water-absorbing expansion layer 123c, and each of the accommodating cavities is correspondingly provided with at least one of the channels 1230, and each of the channels 1230 is provided with an elastic membrane 1231.

[0054] It can be understood that, since the waterproof outer layer is made of elastic material, the water permeability of the holes pierced through the waterproof outer layer by a needle is limited, and the strength of the waterproof outer layer is reduced after piercing. As a preferred embodiment, a connecting portion is provided to form a receiving cavity 1223, each receiving cavity is provided with at least one channel 1230, and the channel 1230 is provided with an elastic membrane 1231; when the core is wrapped, the side wall of the cylindrical elastic bag membrane 123 is attached to the arc surface under the action of air pressure, and the side wall of the cylindrical elastic bag membrane 123 can be compressed to a certain extent under the action of air pressure. Through this setting, reference Figure 7, is a schematic diagram of the side wall of the cylindrical elastic bag film 123 in a normal state. At this time, the elastic film does not undergo elastic deformation. During the coring process, after the side wall of the cylindrical elastic bag film 123 is compressed, the pressure in the accommodating cavity 1223 increases. Figure 8 , so that the elastic film 1231 can be squeezed and expanded. At this time, when passing through the thorn needle, the thorn needle can contact the elastic film 1231, puncture the elastic film, and the elastic film breaks under the action of air pressure, thereby exposing the channel 1230, so that the water on the core can enter the water absorption and expansion layer through the channel, ensuring the water permeability effect.

[0055] Furthermore, as a preferred embodiment, the length of the needle exposed from the working surface 32 is less than the thickness of the waterproof inner layer 123b; since the elastic membrane can expand when punctured, it is only necessary to expose the needle from the working surface 32 to a length that can puncture the elastic membrane. Therefore, the length of the needle exposed from the working surface 32 can be less than the thickness of the waterproof inner layer 123b. This arrangement can prevent the waterproof outer layer from being punctured, thereby ensuring its strength.

[0056] Further, as a preferred embodiment, in order to ensure that the elastic film 1231 can be effectively punctured, the correlation coefficient is set in the following manner: the volume of each of the accommodating cavities when the tubular elastic bag film 123 is in a free state is V1, the elastic coefficient of the water-absorbing expansion layer 123c in a non-water-absorbing state is K1, the gas pressure value passing through the first airway 120 during operation is P1, the number of the channels 1230 corresponding to each of the accommodating cavities is N, the cross-sectional area of ​​the channel is S1, and the adjustment coefficient & has a value range of: 0.27-0.46, then the parameters meet the following relationship: 2S1N=&V1 2 P1 / K1.

[0057] Further, refer to Figure 8As a specific implementation, it also includes an air supply device 4 communicated with the first air channel 120 and a control device 5 communicated with the air supply device, at least one of the rotating shafts is provided with a speed sensor 6, the control device 5 is wirelessly connected with the speed sensor 6, and the control device can control the air supply pressure of the air supply device 4 according to the detection value of the speed sensor 6. In actual use, the air supply system 4 adopts an air supply pump, which is connected to the first air channel in the driving rod 2 through an air supply joint to provide a certain pressure of air; it can be understood that the cylindrical elastic bag membrane 123 is connected from the first isolation The force for the sliding of the gap between the plate and the bushing is provided by the gas provided by the air pump. When the air pressure is too small, the air pressure is not enough to make the side wall of the cylindrical elastic bag membrane 123 adhere to the curved surface of the guide tube, so that the needle cannot contact the cylindrical elastic bag membrane 123. At this time, the rotating shaft does not rotate or rotates slowly; by setting a speed sensor, the speed sensor detects the speed of the rotating shaft, so that the sliding speed of the cylindrical elastic bag membrane 123 can be obtained. When the sliding speed of the cylindrical elastic bag membrane 123 is not compatible with the drilling speed of the core, it proves that the air pressure provided by the air pump is insufficient, and the control device increases the air pressure value.

[0058] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A survey device for geological and rock conditions, comprising a driving rod (2) and a coring barrel (1), characterized in that: The coring barrel (1) comprises a cylindrical body (10) arranged at the end of the driving rod (2), a cutting head (11) arranged at the end of the cylindrical body (10) away from the driving rod (2), and a wrapping assembly (12) arranged inside the cylindrical body (10), wherein the wrapping assembly (12) comprises a first air passage (120) formed in the driving rod, a guide rod (121) arranged in the first air passage (120), a first baffle (122) and a second baffle (124) arranged in a circular shape in the cylindrical body at intervals along the axial direction of the cylindrical body, and a cylindrical elastic bag film (123) sleeved on the first baffle (122), wherein the first baffle (121) is provided in the first air passage (120). 22) and the second partition (124) are both sealed and connected at the end of the guide rod (121) extending into the cylindrical body, and one end of the cylindrical elastic bag film (123) is sealed and fixed to the edge of the second partition (124) to form a first air chamber (12a) between the first partition, the second partition and the cylindrical elastic bag film (123); the guide rod (121) is provided with a first vent (1210) connected to the first air chamber, and the guide rod (121) is provided with a second air channel (1211) connected to the first vent (1210) and the first air channel (120).

2. A geological and rock survey device according to claim 1, characterized in that: The first partition (122) and the second partition (124) are both coaxially arranged with the cylindrical body (10), and the radius of the second partition is smaller than the radius of the first partition. A through gap (1220) is arranged between the circumferential side wall of the first partition (122) and the inner wall of the cylindrical body (10), and the through gap has a dimension D1 along the radial direction of the first partition (122). The wall thickness of the cylindrical elastic bag membrane (123) is D2, wherein D1≤D2.

3. A geological and rock survey device according to claim 2, characterized in that: The first air channel (120) is coaxially arranged with the cylindrical body (10), and the end of the guide rod (121) extending into the first air channel (120) is expanded outwards and provided with a step portion (1212).

4. The geological and rock surveying device according to claim 2, characterized in that: An end plate (101) is detachably connected to the end of the cylindrical body, and the end plate (101) is detachably connected to the driving rod (2).

5. The geological and rock surveying device according to claim 1, characterized in that: The cutting head (11) comprises a connecting tube (110) and a cutting blade (111) which are detachably connected to the cylindrical body (10); an annular boss (112) is provided inwardly extending from the end of the connecting tube (110) away from the cylindrical body (10); the inner diameter of the annular boss (112) is smaller than the radius of the second partition plate; the end face of the annular boss (112) is in the same plane as the end face of the connecting tube (110); and the cutting blade (111) is provided on the end faces of the annular boss and the end face of the connecting tube.

6. The geological and rock surveying device according to claim 5, characterized in that: The cutting blade (111) comprises a plurality of strip-shaped cutting pieces (1110) evenly spaced around the axis of the connecting tube, one end of the strip-shaped cutting piece (1110) being flush with the inner circumferential surface of the annular boss (112) and the other end extending out of the end surface of the connecting tube (110).

7. The geological and rock surveying device according to claim 6, characterized in that: Support ribs (1101) are arranged on the outer circumferential surface of the connecting tube (110) and are arranged in a one-to-one correspondence with the strip-shaped cutting pieces (1110).

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