Logging instrument for geological exploration

Abstract

The invention relates to the field of geological prospecting instruments, and particularly discloses a geological prospecting logging instrument which comprises a probe rod and a cable arranged at the top end of the probe rod and further comprises a positioning assembly arranged at the upper end of the probe rod. The positioning assembly comprises a first supporting part fixedly arranged at the top of the probe rod and a second supporting part arranged above the first supporting part; the first supporting part comprises a lifting disc fixedly arranged at the top end of the probe rod, sliding grooves are evenly formed in the side walls of the periphery of the probe rod, second cross arms are movably connected to the inner sides of the sliding grooves in the radial direction of the lifting disc, and rolling wheels are rotationally arranged at the ends, away from the lifting disc, of the second cross arms. According to the logging instrument for geological exploration, supporting and guiding effects can be achieved when the probe rod is placed into a well through the arranged positioning assembly, shaking of the probe rod is avoided, and the detection precision is improved.

Description

Technical Field

[0001] The invention relates to the field of geological prospecting instruments, and in particular to a well logging instrument for geological prospecting. Background Art

[0002] In the case of drilling exploration technology required for hydrogeological surveys, acoustic logging instruments are usually used to detect the geological conditions of the wells, and the changes in acoustic properties such as the propagation speed, amplitude and frequency of sound waves in different rocks are used to study the geological profile properties of the wells. The acoustic logging instrument includes a long probe rod and a cable connected to the top of the probe rod. The other end of the cable is connected to the host. The cable not only transmits the detection signal, but also can pull the probe rod in and out of the well.

[0003] In order to improve the detection accuracy, the probe rod needs to enter from the middle of the borehole for detection. It is usually lowered manually or by a crane. It lacks support and positioning function or the support and positioning effect is poor. Therefore, the probe rod is easy to shake. The sonic logging instrument transmits sound waves through the transmitting part of the probe rod and receives the reflected sound waves through the receiving part. If the probe rod shakes, it will easily affect the detection effect.

[0004] Therefore, it is necessary to propose a logging instrument for geological exploration to solve the above problems. Summary of the invention

[0005] The main purpose of the present invention is to provide a well logging instrument for geological exploration, which can effectively solve the problems in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A logging instrument for geological exploration, comprising a probe rod and a cable arranged at the top of the probe rod, and also comprising a positioning assembly arranged at the upper end of the probe rod, wherein the positioning assembly comprises a first support portion fixedly arranged at the top of the probe rod and a second support portion arranged above the first support portion;

[0008] The first support part comprises a lifting plate fixedly arranged at the top end of the probe rod, the side walls of the probe rod are evenly provided with sliding grooves, the inner side of the sliding groove is movably connected with a second cross arm along the radial direction of the lifting plate, and the second cross arm is rotatably provided with a roller at one end away from the lifting plate;

[0009] The second supporting part comprises a top plate arranged above the lifting plate, an annular cavity is arranged on the inner side of the top plate, a screw rod corresponding to the second cross arm is rotatably connected to the inner cavity of the annular cavity, and the length direction of the screw rod is consistent with the radial direction of the top plate, a displacement block is threadedly connected to the screw rod, and a sliding rod extending to the outside of the top plate is fixedly arranged at one end of the displacement block away from the axis of the top plate, and a first cross arm corresponding to the second cross arm is arranged at one end of the sliding rod away from the displacement block, and a support plate for contacting and cooperating with the well wall is vertically arranged at the bottom of the first cross arm, and a through hole with an inner diameter larger than the diameter of the cable and used for cable insertion is arranged in the middle of the top plate, and the cable passes through the middle of the lifting plate and then passes upward from the through hole;

[0010] The cam is configured to engage the first and second cams and to engage the second cams, wherein the first and second cams are engaged with the first and second cams and the second and second cams are engaged with the first and second cams, respectively.

[0011] Preferably, a driving mechanism for driving multiple screw rods to rotate is provided on the top plate, and the driving mechanism includes a second gear arranged at one end of the screw rod close to the axis of the top plate, and an end face gear ring meshing with the multiple second gears is rotatably connected to the bottom inner side of the annular cavity, and a motor is provided at one end of the inner cavity of the annular cavity, and a first gear driven to rotate by the motor and meshing with the end face gear ring is provided at the output end of the motor.

[0012] Preferably, the side wall of the support plate is provided with an opening adapted to the roller and used to avoid the roller.

[0013] Preferably, guide wheels are evenly arranged around the inner side of the through hole and are in rolling cooperation with the outer wall of the cable.

[0014] Preferably, the lifting plate is provided with a locking assembly for locking the second cross arm, the locking assembly includes a side groove arranged on the side wall of the inner cavity of the sliding groove, one end of the inner side of the side groove close to the sliding groove is movably connected with a force block along the width direction of the second cross arm, and one end of the inner side of the side groove away from the sliding groove is movably connected with a driving block matched with the inclined surface of the force block, and the moving direction of the driving block is perpendicular to the moving direction of the force block, and a first tooth plate is provided on the side wall of one end of the second cross arm close to the axis of the lifting plate, and a second tooth plate adapted to the first tooth plate is provided on the side of the force block close to the sliding groove, and the second tooth plate is engaged with the first tooth plate.

[0015] Preferably, a reset component for resetting the force block is provided on the inner side of the side groove, and the reset component includes a recess provided on the force block, a stop plate movably engaged with the recess is fixedly provided on the inner wall of the side groove, a second guide rod movably engaged with the stop plate is fixedly provided on the inner side of the recess, and a second spring is provided on the outer side of the second guide rod close to one end of the driving block, so that the second spring is compressed when the force block moves toward the direction of the sliding groove.

[0016] Preferably, a first guide rod is fixedly provided on one end of the inner side of the side groove close to the driving block, and the driving block is movably guided and matched with the first guide rod.

[0017] Preferably, a driving member that is linked with the cable and is used to drive the driving block to move is provided at the upper end of the lifting plate, and the driving member includes a pulling plate fixedly arranged on one end of the cable close to the probe rod, and the pulling plate is located between the lifting plate and the top plate, and the portion of the cable located between the pulling plate and the lifting plate is provided with a bent portion in a bent state, and a pulling rope corresponding to the driving block is fixedly arranged on the side wall of the pulling plate, and one end of the pulling rope away from the pulling plate extends to the inner side of the side groove and is fixedly connected to the driving block, and is configured so that when the driving block is displaced to the limit distance, the bent portion is still in a bent state.

[0018] Preferably, a through slot corresponding to the side slot is provided on the top of the lifting plate, the through slot is in the shape of an elongated strip, and one end of the pulling rope extends into the inside of the side slot through the through slot.

[0019] Preferably, a receiving groove for receiving the bending portion and the pulling disk is provided in the middle of the top of the lifting disk.

[0020] Compared with the prior art, the present invention provides a logging instrument for geological exploration, which has the following

[0021] Beneficial effects:

[0022] 1. The well logging instrument for geological prospecting is composed of a first support part and a second support part through a positioning assembly, which can play a supporting and guiding role when the probe rod is placed in the well, avoiding the shaking of the probe rod and improving the detection accuracy. In addition, the first support part and the second support part can be linked together in cooperation with the linkage locking member. When the second support part is supported and fixed at the upper end of the well, the first support part can be synchronously extended to the well wall, and automatically unlocked when reaching the well wall. The first support part and the probe rod fall as a whole to realize detection. The structure is compact and easy to use. The setting of the driving mechanism facilitates the synchronous displacement of multiple first cross arms and automatic control, saving time and effort.

[0023] 2. The logging instrument used for geological exploration can automatically lock the second cross arm when the lifting plate and the probe rod fall through the provided locking assembly and the driving part, thereby avoiding spontaneous movement and ensuring that the roller always corresponds to the well wall. The gravity of the probe rod and the lifting plate is used as the driving force, which is easy to use and increases practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention when the lifting plate and the top plate are separated;

[0026] Figure 3 It is a structural schematic diagram of the lifting plate of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the top plate of the present invention when it is disassembled;

[0028] Figure 5 It is a schematic diagram of the structure of the guide wheel and the through hole of the present invention when they are separated;

[0029] Figure 6 It is a schematic diagram of the structure of the first cross arm and the sliding rod of the present invention in a disassembled state;

[0030] Figure 7 It is a schematic diagram of the disassembled structure of the lifting plate of the present invention in a cross-sectional state;

[0031] Figure 8 It is a schematic diagram of the structure of the driving block, the force bearing block and the second cross arm of the present invention in a coordinated state;

[0032] Fig. 9 It is a schematic structural diagram of the present invention in which the force-bearing block, the stop plate and the second guide rod are disassembled.

[0033] In the figure: 1, lifting plate; 2, top plate; 3, cable; 4, probe rod; 5, first cross arm; 6, second cross arm; 7, support plate; 8, roller; 9, sliding rod; 10, connecting plate; 11, pulling plate; 12, bending part; 13, pulling rope; 14, through groove; 15, plug plate; 16, receiving groove; 17, annular cavity; 18, opening; 19, end face gear ring; 20, motor; 21, first gear; 22, screw rod; 23, second Gear; 24, displacement block; 25, through hole; 26, guide wheel; 27, first plug hole; 28, floating groove; 29, first spring; 30, second plug hole; 31, locking tongue; 32, locking groove; 33, sliding groove; 34, side groove; 35, driving block; 36, force block; 37, first guide rod; 38, notch; 39, first tooth plate; 40, second tooth plate; 41, stop plate; 42, second guide rod; 43, second spring. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] like Figure 1-Figure 2 As shown, a logging instrument for geological exploration includes a probe rod 4 and a cable 3 arranged at the top of the probe rod 4, and also includes a positioning assembly arranged at the upper end of the probe rod 4, the positioning assembly includes a first support portion fixedly arranged at the top of the probe rod 4 and a second support portion arranged above the first support portion;

[0036] Further, such as Figure 1-Figure 3 , Figure 7-Figure 8 As shown, as an embodiment, the first support portion includes a lifting plate 1 fixedly arranged at the top of the probe rod 4, and the side walls of the probe rod 4 are evenly provided with sliding grooves 33. The inner side of the sliding groove 33 is movably connected with a second cross arm 6 along the radial direction of the lifting plate 1. The second cross arm 6 can adjust the length by telescopic means. The specific adjustment method adopts conventional means and will not be described in detail. The second cross arm 6 is rotatably provided with a roller 8 at one end away from the lifting plate 1;

[0037] like Figure 1-Figure 2 , Figure 4-Figure 6As shown, as an embodiment, the second supporting portion includes a top plate 2 arranged above the lifting plate 1, and an annular cavity 17 is arranged on the inner side of the top plate 2. The inner cavity of the annular cavity 17 is rotatably connected with a screw rod 22 corresponding to the second cross arm 6 one by one, and the length direction of the screw rod 22 is consistent with the radial direction of the top plate 2. A displacement block 24 is threadedly connected to the screw rod 22, and the end of the displacement block 24 away from the axis of the top plate 2 is fixedly provided with a sliding rod 9 extending to the outside of the top plate 2, and the end of the sliding rod 9 away from the displacement block 24 is provided with a first cross arm 5 corresponding to the second cross arm 6. The sliding rod 9 can adjust the length by telescopic means, which is the same or similar to the adjustment method of the second cross arm 6. The specific adjustment method adopts conventional means and will not be described in detail. A support plate 7 for contacting with the well wall is vertically arranged at the bottom of the cross arm 5, and a through hole 25 with an inner diameter larger than the diameter of the cable 3 and used for inserting the cable 3 is arranged in the middle of the top plate 2. The cable 3 passes through the middle of the lifting plate 1 and then passes upward from the through hole 25. In order to rotate the screw rod 22, a driving mechanism for driving the rotation of multiple screw rods 22 is arranged on the top plate 2. The driving mechanism includes a second gear 23 arranged at one end of the screw rod 22 close to the axis of the top plate 2, and an end face gear ring 19 meshing with multiple second gears 23 is rotatably connected to the bottom of the inner side of the annular cavity 17. A motor 20 is arranged at one end of the inner cavity of the annular cavity 17, and a first gear 21 driven to rotate by the motor 20 and meshing with the end face gear ring 19 is arranged at the output end of the motor 20.

[0038] In addition, if Figure 3-Figure 4 , Figure 6-Figure 8 As shown, in order to make the first support part and the second support part extend and displace synchronously, a linkage locking member is also included, which includes a connecting plate 10 fixedly arranged at one end of the sliding rod 9 away from the displacement block 24, a floating groove 28 is arranged at one end of the connecting plate 10 close to the first cross arm 5, one end of the first cross arm 5 is movably connected to the inner side of the floating groove 28, a first spring 29 is arranged between one end of the first cross arm 5 and the inner wall of the floating groove 28, a first plug hole 27 is arranged through the top of the connecting plate 10, and a second plug hole corresponding to the first plug hole 27 and having a width greater than the first plug hole 27 is arranged through the top of the end of the first cross arm 5 close to the first spring 29 30, a locking tongue 31 is provided at one end of the inner side of the second insertion hole 30 close to the first spring 29, and a plug plate 15 for plugging and cooperating with the first insertion hole 27 and the second insertion hole 30 is provided at the top of the second cross arm 6 corresponding to the first insertion hole 27, and a locking groove 32 for plugging in the locking tongue 31 is provided on the side wall of the plug plate 15, and is configured to separate the locking tongue 31 from the locking groove 32 when the end of the roller 8 away from the second cross arm 6 corresponds to the side of the support plate 7 away from the sliding rod 9, and in order to avoid the support plate 7 from obstructing the roller 8 when the roller 8 is displaced, an opening 18 adapted to the roller 8 and used to avoid the roller 8 is provided through the side wall of the support plate 7.

[0039] like Figure 5As shown, in order to reduce the friction between the cable 3 and the through hole 25 and increase the stability of the cable 3, guide wheels 26 that roll with the outer wall of the cable 3 are evenly arranged around the inner side of the through hole 25.

[0040] like Figure 2-Figure 3 , Figure 7-Figure 9 As shown, the lifting plate 1 is provided with a locking assembly for locking the second cross arm 6, and the locking assembly includes a side groove 34 arranged on the side wall of the inner cavity of the sliding groove 33, and the end of the inner side of the side groove 34 close to the sliding groove 33 is movably connected with a force block 36 along the width direction of the second cross arm 6, and the end of the inner side of the side groove 34 away from the sliding groove 33 is movably connected with a driving block 35 matched with the inclined surface of the force block 36, and the moving direction of the driving block 35 is perpendicular to the moving direction of the force block 36. In order to increase the stability of the driving block 35, a A first guide rod 37 is provided, and the driving block 35 is movably guided and matched with the first guide rod 37. A first tooth plate 39 is provided on the side wall of one end of the second cross arm 6 close to the axis of the lifting plate 1. A second tooth plate 40 adapted to the first tooth plate 39 is provided on the side of the force block 36 close to the sliding groove 33. The second tooth plate 40 is engaged with the first tooth plate 39. In order to facilitate the resetting of the force block 36, a reset component for resetting the force block 36 is provided on the inner side of the side groove 34. The reset component includes a notch 38 provided on the force block 36, and a notch 38 movably matched with the notch 38 is fixedly provided on the inner wall of the side groove 34. The stop plate 41 is fixedly provided inside the notch 38 with a second guide rod 42 that cooperates with the movable guide of the stop plate 41. The second guide rod 42 is sleeved with a second spring 43 on the outer side of one end near the driving block 35, so that when the force block 36 moves in the direction of the sliding groove 33, the second spring 43 is compressed. In order to realize the displacement of the driving block 35, a driving member that is linked with the cable 3 and is used to drive the displacement of the driving block 35 is provided at the upper end of the lifting plate 1. The driving member includes a pulling plate 11 fixedly provided at one end of the cable 3 near the probe rod 4, and the pulling plate 11 is located between the lifting plate 1 and the top plate 2. The cable 3 The portion between the pulling disk 11 and the lifting disk 1 is provided with a bent portion 12 in a bent state, and a pulling rope 13 corresponding to the driving block 35 is fixedly provided on the side wall of the pulling disk 11, and one end of the pulling rope 13 away from the pulling disk 11 extends to the inner side of the side groove 34 and is fixedly connected to the driving block 35, and is configured so that when the driving block 35 is displaced to the limit distance, the bent portion 12 is still in a bent state, and a through groove 14 corresponding to the side groove 34 is provided on the top of the lifting disk 1, and the through groove 14 is in a long strip shape, and one end of the pulling rope 13 extends to the inside of the side groove 34 through the through groove 14.

[0041] In addition, in order to hide the bending part 12 and the pulling disk 11 conveniently, a receiving groove 16 for receiving the bending part 12 and the pulling disk 11 is provided in the middle of the top of the lifting disk 1, so that the volume can be reduced after the two are combined, which is convenient for carrying.

[0042] When in use, the lifting plate 1 and the top plate 2 are initially fitted together, the pulling plate 11 and the curved portion 12 are hidden in the accommodating groove 16, and the insert plate 15 is inserted in the first insertion hole 27 and the second insertion hole 30, the locking tongue 31 is inserted in the locking groove 32, and the second cross arm 6 and the sliding rod 9 do not protrude too much. The length of the sliding rod 9 and the second cross arm 6 is adjusted according to the inner diameter of the well, and the lifting plate 1, the top plate 2, and the probe rod 4 are placed as a whole at the wellhead, so that the end of the first cross arm 5 away from the sliding rod 9 is overlapped on the top periphery of the well, and then the control motor 20 drives the first gear 21 to rotate, and the first gear 21 drives the end face gear ring 19 to rotate, and the end face gear ring 19 drives the multiple screws 22 to rotate through the multiple second gears 23, and then the multiple displacement blocks 24 drive the sliding rod 9 to move outward, and then the sliding rod 9 drives the first cross arm 5 to move outward, and the second cross arm 6 is driven to move outward synchronously, and then the support plate 7 gradually approaches the well wall, and the support plate When the first spring 29 is pressed against the well wall, the sliding rod 9 continues to move outward, the first cross arm 5 remains stationary, and the first spring 29 is compressed, and the roller 8 passes through the opening 18 and gradually approaches the well wall, and the locking tongue 31 gradually disengages from the locking groove 32. After completely disengaging, the roller 8 corresponds to the well wall, and the probe rod 4 and the lifting plate 1 fall as a whole under their own weight, and the cable 3 is lowered. The guide wheel 26 can reduce friction and guide the cable 3 at the same time. Due to the gravity of the probe rod 4 and the lifting plate 1, the pulling plate 11 and the curved portion 12 move upward relative to the lifting plate 1, the pulling rope 13 is tightened, and then the pulling rope 13 drives the driving block 35 to move, and the driving block 35 drives the force block 36 to move, the second spring 43 is compressed, and then the force block 36 drives the second tooth plate 40 to engage with the first tooth plate 39, thereby locking the second cross arm 6 to ensure the stability of the roller 8, and then the detection is realized while going down, which is convenient to use, has high stability, and increases practicality.

[0043] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A logging instrument for geological exploration, comprising a probe rod (4) and a cable (3) arranged at the top of the probe rod (4), characterized in that: It also includes a positioning assembly arranged at the upper end of the probe rod (4), the positioning assembly comprising a first support portion fixedly arranged at the top of the probe rod (4) and a second support portion arranged above the first support portion; The first support portion comprises a lifting plate (1) fixedly arranged at the top end of the probe rod (4), the side walls of the probe rod (4) are evenly provided with sliding grooves (33), the inner side of the sliding groove (33) is movably connected with a second cross arm (6) along the radial direction of the lifting plate (1), and the second cross arm (6) is rotatably provided with a roller (8) at one end away from the lifting plate (1); The second supporting portion comprises a top plate (2) arranged above the lifting plate (1), an annular cavity (17) being arranged on the inner side of the top plate (2), a screw rod (22) corresponding to the second cross arm (6) being rotatably connected to the inner cavity of the annular cavity (17), and the length direction of the screw rod (22) is consistent with the radial direction of the top plate (2), a displacement block (24) being threadedly connected to the screw rod (22), and a displacement block (24) extending to the top plate (2) is fixedly arranged at one end of the displacement block (24) away from the axis of the top plate (2) A sliding rod (9) is disposed outside the plate (2), and a first cross arm (5) corresponding to the second cross arm (6) is disposed at one end of the sliding rod (9) away from the displacement block (24). A support plate (7) for contacting with the well wall is vertically disposed at the bottom of the first cross arm (5). A through hole (25) having an inner diameter greater than the diameter of the cable (3) and for inserting the cable (3) is disposed in the middle of the top plate (2). The cable (3) passes through the middle of the lifting plate (1) and then passes upward from the through hole (25); The linkage locking member also includes a connecting plate (10) fixedly arranged at one end of the sliding rod (9) away from the displacement block (24); a floating groove (28) is arranged at one end of the connecting plate (10) close to the first cross arm (5); one end of the first cross arm (5) is movably connected to the inner side of the floating groove (28); a first spring (29) is arranged between one end of the first cross arm (5) and the inner wall of the floating groove (28); a first plug hole (27) is arranged through the top of the connecting plate (10); a spring (29) corresponding to the first plug hole (27) is arranged through the top of the end of the first cross arm (5) close to the first spring (29); A second insertion hole (30) having a width greater than that of the first insertion hole (27), a locking tongue (31) is provided at one end of the inner side of the second insertion hole (30) close to the first spring (29), a plug plate (15) for plugging and cooperating with the first insertion hole (27) and the second insertion hole (30) is provided at the top of the second cross arm (6) corresponding to the first insertion hole (27), a locking groove (32) for plugging the locking tongue (31) is provided on the side wall of the plug plate (15), and the locking tongue (31) is configured to separate from the locking groove (32) when one end of the roller (8) away from the second cross arm (6) corresponds to the side of the support plate (7) away from the sliding rod (9).

2. A logging instrument for geological exploration according to claim 1, characterized in that: The top plate (2) is provided with a driving mechanism for driving a plurality of screw rods (22) to rotate, the driving mechanism comprising a second gear (23) arranged at one end of the screw rod (22) close to the axis of the top plate (2), the inner bottom of the annular cavity (17) is rotatably connected to an end face gear ring (19) meshing with the plurality of second gears (23), one end of the inner cavity of the annular cavity (17) is provided with a motor (20), and the output end of the motor (20) is provided with a first gear (21) driven to rotate by the motor (20) and meshing with the end face gear ring (19).

3. A logging instrument for geological exploration according to claim 1, characterized in that: The side wall of the support plate (7) is provided with an opening (18) adapted to the roller (8) and used to avoid the roller (8).

4. A logging instrument for geological exploration according to claim 1, characterized in that: Guide wheels (26) are evenly arranged around the inner side of the through hole (25) and are in rolling engagement with the outer wall of the cable (3).

5. A logging instrument for geological exploration according to claim 1, characterized in that: The lifting plate (1) is provided with a locking assembly for locking the second cross arm (6), the locking assembly comprising a side groove (34) arranged on the side wall of the inner cavity of the sliding groove (33), an end of the inner side of the side groove (34) close to the sliding groove (33) is movably connected with a force block (36) along the width direction of the second cross arm (6), an end of the inner side of the side groove (34) away from the sliding groove (33) is movably connected with a driving block (35) matched with the inclined surface of the force block (36), and the moving direction of the driving block (35) is perpendicular to the moving direction of the force block (36), a first tooth plate (39) is arranged on the side wall of one end of the second cross arm (6) close to the axis of the lifting plate (1), and a second tooth plate (40) adapted to the first tooth plate (39) is arranged on the side of the force block (36) close to the sliding groove (33), and the second tooth plate (40) is engaged with the first tooth plate (39).

6. A logging instrument for geological exploration according to claim 5, characterized in that: A reset component for resetting the force-bearing block (36) is arranged on the inner side of the side groove (34), and the reset component includes a notch (38) arranged on the force-bearing block (36); a stop plate (41) movably matched with the notch (38) is fixedly arranged on the inner wall of the side groove (34); a second guide rod (42) movably matched with the stop plate (41) is fixedly arranged on the inner side of the notch (38); a second spring (43) is sleeved on the outer side of the second guide rod (42) near one end of the driving block (35), so that the second spring (43) is compressed when the force-bearing block (36) moves in the direction of the sliding groove (33).

7. A logging instrument for geological exploration according to claim 5, characterized in that: A first guide rod (37) is fixedly arranged at one end of the inner side of the side groove (34) close to the driving block (35), and the driving block (35) is movably guided and matched with the first guide rod (37).

8. A logging instrument for geological exploration according to claim 5, characterized in that: The upper end of the lifting plate (1) is provided with a driving member that is linked with the cable (3) and is used to drive the driving block (35) to move. The driving member includes a pulling plate (11) fixedly arranged at one end of the cable (3) close to the probe rod (4), and the pulling plate (11) is located between the lifting plate (1) and the top plate (2). The portion of the cable (3) located between the pulling plate (11) and the lifting plate (1) is provided with a bent portion (12) in a bent state. A pulling rope (13) corresponding to the driving block (35) is fixedly arranged on the side wall of the pulling plate (11), and the end of the pulling rope (13) away from the pulling plate (11) extends to the inner side of the side groove (34) and is fixedly connected to the driving block (35), and is configured so that when the driving block (35) moves to a limit distance, the bent portion (12) is still in a bent state.

9. A logging instrument for geological exploration according to claim 8, characterized in that: The top of the lifting plate (1) is provided with a through slot (14) corresponding to the side slot (34) one by one. The through slot (14) is in the shape of a long strip, and one end of the pulling rope (13) extends into the inside of the side slot (34) through the through slot (14).

10. A logging instrument for geological exploration according to claim 8, characterized in that: A receiving groove (16) for receiving the bending portion (12) and the pulling disk (11) is provided in the middle of the top of the lifting disk (1).

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