Water conservancy project expansion joint change quantitative detection equipment

Abstract

The invention relates to hydraulic engineering expansion joint change quantitative detection equipment, and belongs to the technical field of detection equipment. Comprising a mounting shell, a pair of detection plates arranged at the bottom of the mounting shell and two first dial plates arranged at the top of the mounting shell, and each first dial plate comprises a first rotating shaft rotationally connected to the top of the mounting shell, a first pointer connected to the top end of the first rotating shaft and a first driving disc connected to the bottom end of the first rotating shaft; the bottom end of the first rotating shaft is rotationally connected to the bottom face of the inner wall of the mounting shell, a damping ring is arranged between the first rotating shaft and the bottom face of the inner wall of the mounting shell, the first driving rod and the second driving rod are both in a rack shape, a first outer gear ring is rotationally connected to the outside of the first driving disc, and a one-way driver is arranged between the first driving disc and the first outer gear ring. The transmission directions of the one-way drivers arranged in the two first dial plates are opposite. According to the invention, the problems of single function and large limitation of expansion joint detection equipment in the prior art are solved.

Description

Technical Field

[0001] The invention relates to a quantitative detection device for changes in expansion joints of a hydraulic engineering project, belonging to the technical field of detection devices. Background Art

[0002] The status and development trends of cracks and expansion joints in water conservancy projects should be monitored regularly in order to analyze the causes of their changes and their impact on the safety of water conservancy projects, and to carry out effective management in a timely manner.

[0003] After searching, the patent announcement number CN113251894B discloses an expansion joint detection mechanism for underwater concrete engineering, wherein the bottom ends of the two support plates are fixedly connected with a pad, and a guide tube is embedded and connected inside the pad, and the first connecting bolt is threadedly connected inside the guide tube, and a universal wheel is fixedly installed on the bottom end of the pad, and a detection mechanism is installed inside the two support plates, and the detection mechanism includes a slot fixedly connected to the inner wall of the support plate, and a connecting plate is movably sleeved inside the slot.

[0004] In the above scheme, through the action of the detection mechanism, the connecting plate can be conveniently installed in the card slot. Through the preset first reset spring, the two I-shaped blocks can drive the card block to move in opposite directions, and the card block is sleeved in the expansion joint so that the two card blocks can fit on both sides of the inner wall of the expansion joint. The reel in the C-shaped plate rotates, the tape measure is retracted and released, and the scale on the tape measure is observed to measure the size of the expansion joint.

[0005] However, there are also certain limitations. For example, the equipment is too large, which makes it inconvenient to carry and use outdoors for a long time. In addition, the detection data is relatively single and can only observe the current width of the expansion joint, which makes it inconvenient to grasp the state of the expansion joint structure changes.

[0006] Therefore, a new solution needs to be proposed to solve this problem. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a quantitative detection device for changes in expansion joints of water conservancy projects, which solves the problem that the expansion joint detection device in the prior art has a single function and great limitations.

[0008] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions: A quantitative detection device for expansion joint changes in a hydraulic engineering project, comprising a mounting shell, a pair of detection plates disposed at the bottom of the mounting shell, and two first dials disposed at the top of the mounting shell; Wherein, a pair of the detection plates are parallel to each other, a first slide groove and a second slide groove communicating with the interior of the mounting shell are respectively opened at the bottom of the mounting shell, a first driving rod and a second driving rod are respectively slidably connected in the first slide groove and the second slide groove, the first driving rod and the second driving rod are parallel to each other, the two detection plates are respectively fixedly connected to the first driving rod and the second driving rod, and a pressure spring is provided between the first driving rod and the second driving rod between the inner wall of the mounting shell; The first dial includes a first shaft rotatably connected to the top of the mounting shell, a first pointer connected to the top of the first shaft, and a first driving disk connected to the bottom end of the first shaft, the bottom end of the first shaft is rotatably connected to the bottom surface of the inner wall of the mounting shell, and a damping ring is provided between the first shaft and the bottom surface of the inner wall of the mounting shell, the first driving disk is located between the first driving rod and the second driving rod, the first driving rod and the second driving rod are both rack-shaped, the first driving disk is rotatably connected to the outside with a first outer toothed ring, the first outer toothed ring is respectively meshed with the first driving rod and the second driving rod on both sides, a one-way transmission is provided between the first driving disk and the first outer toothed ring, and the one-way transmissions provided in the two first dials have opposite transmission directions.

[0009] The present invention is further configured as follows: the first rotating shaft includes a first connecting section and a second connecting section, the first connecting section is slidably arranged on the top of the mounting shell and a first friction block is fixedly connected to the bottom, a truncated cone-shaped abutting groove coaxial with the second connecting section is provided at the bottom end of the first friction block, a first fixing ring fixedly connected to the top surface of the mounting shell is sleeved on the outer periphery of the first connecting section, a reset torsion spring is arranged between the first fixing ring and the first connecting section, and a truncated cone-shaped first abutting block matched with the abutting groove is fixedly connected to the top end of the second connecting section; A clutch member for driving the first friction block and the first abutment block to separate or merge is arranged in the mounting shell.

[0010] The present invention is further configured as follows: the one-way transmission includes a plurality of friction parts opened on the inner wall of the first outer gear ring, the friction parts include a mounting groove opened on the inner wall of the first outer gear ring, an abutment ball arranged in the mounting groove, and a support spring arranged at one end of the mounting groove and abutting against the abutment ball, the depth of the mounting groove gradually becomes shallower from one end toward the other end, and when the abutment ball moves toward the other end of the mounting groove where the abutment ball is shallower, it abuts against the outer peripheral wall of the first driving disk.

[0011] The present invention is further configured as follows: two second dials are further arranged on the top of the mounting shell, a third slide groove and a fourth slide groove are respectively opened on the bottom of the mounting shell and are connected to the inside thereof, a third driving rod and a fourth driving rod are respectively slidably connected in the third slide groove and the fourth slide groove, the third driving rod and the fourth driving rod are parallel to each other, the two detection plates are respectively fixedly connected to the third driving rod and the fourth driving rod, and a pressure spring is arranged between the third driving rod and the fourth driving rod between the inner wall of the mounting shell; The second dial comprises a second rotating shaft rotatably connected to the top of the mounting shell, a second pointer connected to the top of the second rotating shaft, and a second driving disk connected to the bottom end of the second rotating shaft, the bottom end of the second rotating shaft is rotatably connected to the bottom surface of the inner wall of the mounting shell, the second driving disk is located between the third driving rod and the fourth driving rod, the third driving rod and the fourth driving rod are both in the shape of a rack, the second driving disk is rotatably connected to the outside with a second outer gear ring, the second outer gear ring is respectively meshed with the third driving rod and the fourth driving rod on both sides, and a transmission structure is provided between the second driving disk and the second outer gear ring; The transmission structure includes an annular groove opened on the peripheral wall of the second driving disk, a fixed block fixedly connected to the annular groove, and a moving block fixedly connected to the inner wall of the second outer gear ring and rotatably abutting against the fixed block. The moving blocks in the two second dials are respectively abutted against the two sides of the fixed block.

[0012] The present invention is further configured as follows: a second friction block is slidably sleeved on the second rotating shaft, a truncated cone-shaped abutment groove coaxial with the second rotating shaft is formed at the bottom end of the second friction block, a second fixing ring fixedly connected to the top surface of the inner part of the mounting shell is sleeved on the outer periphery of the second rotating shaft, a return torsion spring is provided between the second fixing ring and the second rotating shaft, and a truncated cone-shaped second abutment block matching the abutment groove is fixedly connected to the second rotating shaft; A clutch member for driving the second friction block and the second abutment block to separate or merge is arranged in the mounting shell.

[0013] The present invention is further configured as follows: a third dial is also provided on the top of the mounting shell, and the third dial includes a third rotating shaft rotatably connected to the top of the mounting shell, a third pointer connected to the top of the third rotating shaft, and a transmission gear fixedly connected to the bottom end of the third rotating shaft, and both sides of the transmission gear are respectively engaged between the second driving rod and the third driving rod, and the bottom end of the third rotating shaft is rotatably connected to the bottom surface of the inner wall of the mounting shell.

[0014] The present invention is further configured as follows: the third rotating shaft includes a third connecting section and a fourth connecting section, the third connecting section is slidably arranged on the top of the mounting shell and a third friction block is fixedly connected to the bottom, a truncated cone-shaped abutment groove coaxial with the fourth connecting section is provided at the bottom end of the third friction block, a third fixing ring fixedly connected to the inner top surface of the mounting shell is sleeved on the outer periphery of the third connecting section, a reset torsion spring is arranged between the third fixing ring and the third connecting section, and a truncated cone-shaped third abutment block matched with the abutment groove is fixedly connected to the top of the fourth connecting section; A clutch member for driving the third friction block and the third abutment block to separate or merge is arranged in the mounting shell.

[0015] The present invention is further configured as follows: the clutch component includes a movable plate, a force spring arranged between the movable plate and the top surface of the inner wall of the mounting shell, the bottom surface of the movable plate is fixedly connected with a button passing through the bottom surface of the mounting shell, the movable plate is perpendicular to the first rotating shaft, the second rotating shaft and the third rotating shaft, the movable plate is provided with connecting holes corresponding to the first rotating shaft, the second rotating shaft and the third rotating shaft respectively, the first friction block, the second friction block and the third friction block are all provided with connecting ring grooves on the peripheral walls, and the first friction block, the second friction block and the third friction block are all rotatably connected to the connecting ring grooves through the connecting ring grooves.

[0016] The present invention is further configured as follows: a sliding groove with a dovetail-shaped cross-section is provided at the bottom of the first driving rod, the second driving rod, the third driving rod and the fourth driving rod, and a sliding plate matching the sliding groove is fixedly connected to the top of the detection plate, wherein the sliding plate at the top of one detection plate is slidably connected to the first driving rod and the third driving rod, respectively, and the sliding plate at the top of the other detection plate is slidably connected to the second driving rod and the fourth driving rod, and a threaded hole is provided on the sliding plate, and a fastening bolt that abuts against the inner wall of the sliding groove is threadedly connected in the threaded hole.

[0017] The beneficial effects of the present invention are: 1. By setting a first dial, a second dial and a third dial, when in use, the two detection plates are pressed together to shrink the pressure spring inside the mounting shell, and then inserted into the expansion joint to be detected. When the expansion joint expands or contracts, the detection plate moves accordingly, driving the first drive rod, the second drive rod, the third drive rod and the fourth drive rod to move relative to each other. The first dial located between the first drive rod and the second drive rod converts the linear motion of the expansion joint into a unidirectional rotation on the first dial through a unidirectional transmission. Since the transmission directions of the unidirectional transmissions in the two first dials are different, the two first dials can respectively reflect the expansion motion and contraction motion of the expansion joint, and the total displacement of the motion is superimposed and reflected on the first dial. The second dial between the moving rod and the fourth driving rod converts the linear motion of the expansion joint into a unidirectional rotation on the second dial through the transmission structure. Similarly, due to the different abutment directions of the moving blocks of the transmission structure in the two second dials, the two second dials respectively reflect the expansion and contraction motions of the expansion joint, and record the maximum displacement of the motion on the second dial. The third dial between the second driving rod and the third driving rod directly reflects the current expansion or expansion amount relative to the initial state through the transmission gear. The staff can also directly measure the width of the expansion joint through the spacing between the two detection plates. Through the four data, the movement state and activity level of the expansion joint in the past certain period of time can be calculated, and timely and effective treatment can be carried out in a targeted manner. 2. By respectively arranging a first friction block and a first abutment block on the first dial, respectively arranging a second friction block and a second abutment block on the second dial, respectively arranging a third friction block and a third abutment block on the third dial, and driving the first friction block, the second friction block and the third friction block to be clutched with the first abutment block, the second abutment block and the third abutment block respectively through a clutch member, when the first friction block is separated from the first abutment block, the first connecting section resets the first pointer to zero under the action of a reset torsion spring, when the second friction block is separated from the second abutment block, the second rotating shaft resets the second pointer to zero under the action of a reset torsion spring, and when the third friction block is separated from the third abutment block, the third connecting section resets the third pointer to zero under the action of a reset torsion spring, that is, pressing the movable plate can reset all dials to zero, which is convenient for use; 3. By detachably connecting the detection plate to the first, second, third and fourth driving rods through fastening bolts, it is convenient for staff to adjust the initial spacing between the two detection plates, thereby improving the overall applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a structural schematic diagram of the bottom of the present invention.

[0020] Figure 3 It is an overall cross-sectional view of the present invention.

[0021] Figure 4 yes Figure 2 A partial enlarged view of part A.

[0022] Figure 5 It is a cross-sectional view of the first dial and the second dial in the present invention.

[0023] Figure 6 yes Figure 5 A partial enlarged view of part B.

[0024] Figure 7 yes Figure 5 A partial enlarged view of part C.

[0025] Figure 8 It is an overall cross-sectional view of the present invention.

[0026] Fig. 9 yes Figure 8 A partial enlarged view of part D.

[0027] Fig.10 It is a cross-sectional view of the third dial portion of the present invention.

[0028] Fig.11 yes Fig.10 A partial enlarged view of part E in the middle.

[0029] In the figure: 1, mounting shell; 2, detection plate; 3, first dial; 4, second dial; 5, third dial; 6, first slide groove; 7, second slide groove; 8, third slide groove; 9, fourth slide groove; 10, first drive rod; 11, second drive rod; 12, third drive rod; 13, fourth drive rod; 14, pressure spring; 15, sliding groove; 16, slide plate; 17, threaded hole; 18, fastening bolt; 19, first rotating shaft; 20, first pointer; 21, first drive disk; 22, damping ring; 23, first outer gear ring; 24, one-way transmission; 25, friction member; 26, mounting groove; 27, contact ball; 28, support spring; 29, first connecting section; 30, second connecting section; 31, first Friction block; 32, abutment groove; 33, first fixed ring; 34, reset torsion spring; 35, first abutment block; 36, second rotating shaft; 37, second pointer; 38, second driving disk; 39, second outer gear ring; 40, transmission structure; 41, annular groove; 42, fixed block; 43, moving block; 44, second friction block; 45, second fixed ring; 46, second abutment block; 47, third rotating shaft; 48, third pointer; 49, transmission gear; 50, third connecting section; 51, fourth connecting section; 52, third friction block; 54, third fixed ring; 55, third abutment block; 56, clutch; 57, moving plate; 58, force spring; 59, button; 60, connecting hole; 61, connecting ring groove. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the present invention is further described below with reference to specific illustrations.

[0031] like Figure 1-Figure 11 As shown, a quantitative detection device for expansion joint changes in a water conservancy project includes a mounting shell 1, a pair of detection plates 2 arranged at the bottom of the mounting shell 1, two first dials 3, two second dials 4 and a third dial 5 arranged at the top of the mounting shell 1.

[0032] Among them, a pair of detection plates 2 are parallel to each other and perpendicular to the bottom surface of the mounting shell 1. The bottom of the mounting shell 1 is respectively provided with a first slide groove 6, a second slide groove 7, a third slide groove 8 and a fourth slide groove 9 connected to the inside thereof, and the first slide groove 6, the second slide groove 7, the third slide groove 8 and the fourth slide groove 9 are all penetrated along the width direction of the mounting shell 1 and are parallel to each other. The first drive rod 10 and the second drive rod 11 are slidably connected in the first slide groove 6 and the second slide groove 7, respectively, and the third drive rod 12 and the fourth drive rod 13 are slidably connected in the third slide groove 8 and the fourth slide groove 9, respectively. The first drive rod 10, the second drive rod 11, the third drive rod 12 and the fourth drive rod 13 are parallel to each other. The first drive rod 10, the second drive rod 11, the third drive rod 12 and the fourth drive rod 13 are parallel to each other. The moving rod 12 and the fourth driving rod 13 are arranged in sequence, one detection plate 2 is fixedly connected to the first driving rod 10 and the third driving rod 12, the other detection plate 2 is fixedly connected to the second driving rod 11 and the fourth driving rod 13, the first driving rod 10, the second driving rod 11, the third driving rod 12 and the fourth driving rod 13 are all provided with a pressure spring 14 between the inner wall of the mounting shell 1, the pressure spring 14 connected to the first driving rod 10 and the third driving rod 12 is connected to one side of the inner wall of the mounting shell 1, and the pressure spring 14 connected to the second driving rod 11 and the fourth driving rod 13 is connected to the other side of the inner wall of the mounting shell 1, and the pressure spring 14 located on both sides applies an elastic force to move the two detection plates 2 away from each other.

[0033] The first drive rod 10, the second drive rod 11, the third drive rod 12 and the fourth drive rod 13 are all provided with a sliding groove 15 with a dovetail cross section at the bottom, and the top of the detection plate 2 is respectively fixedly connected with a slide plate 16 matched with the sliding groove 15, wherein the slide plate 16 at the top of one detection plate 2 is respectively slidably connected to the first drive rod 10 and the third drive rod 12, and the slide plate 16 at the top of another detection plate 2 is respectively slidably connected to the second drive rod 11 and the fourth drive rod 13, and the slide plates 16 are all provided with threaded holes 17, and the threaded holes 17 are internally threadedly connected with fastening bolts 18 that abut against the inner wall of the sliding groove 15. By detachably connecting the detection plate 2 with the first, second, third and fourth drive rods 13 through the fastening bolts 18, it is convenient for the staff to adjust the initial spacing between the two detection plates 2, thereby improving the overall applicability of the equipment.

[0034] The first dial 3 includes a first rotating shaft 19 rotatably connected to the top of the mounting shell 1, a first pointer 20 connected to the top of the first rotating shaft 19, and a first driving disk 21 connected to the bottom end of the first rotating shaft 19. The bottom end of the first rotating shaft 19 is rotatably connected to the bottom surface of the inner wall of the mounting shell 1, and a damping ring 22 is provided between the first rotating shaft 19 and the bottom surface of the inner wall of the mounting shell 1. The first driving disk 21 is located between the first driving rod 10 and the second driving rod 11. The first driving rod 10 and the second driving rod 11 are both rack-shaped. The first driving disk 21 is rotatably connected to the outside with a first outer toothed ring 23. The first outer toothed ring 23 is respectively meshed with the first driving rod 10 and the second driving rod 11 on both sides.

[0035] A one-way transmission device 24 is provided between the first driving disk 21 and the first outer toothed ring 23. The one-way transmission devices 24 provided in the two first dials 3 have opposite transmission directions. The one-way transmission device 24 includes a plurality of friction members 25 provided on the inner wall of the first outer toothed ring 23. The friction members 25 include a mounting groove 26 provided on the inner wall of the first outer toothed ring 23, an abutment ball 27 provided in the mounting groove 26, and a support spring 28 provided at one end of the mounting groove 26 and abutting against the abutment ball 27. The depth of the mounting groove 26 gradually becomes shallower from one end toward the other end. When the abutment ball 27 moves toward the other shallower end of the mounting groove 26, it abuts against the outer peripheral wall of the first driving disk 21.

[0036] The first rotating shaft 19 includes a first connecting section 29 and a second connecting section 30. The first connecting section 29 is slidably inserted into the top of the mounting shell 1 and a first friction block 31 is fixedly connected to the bottom. A truncated cone-shaped abutment groove 32 coaxial with the second connecting section 30 is formed at the bottom end of the first friction block 31. A first fixing ring 33 fixedly connected to the inner top surface of the mounting shell 1 is sleeved on the outer periphery of the first connecting section 29. A reset torsion spring 34 is provided between the first fixing ring 33 and the first connecting section 29. A truncated cone-shaped first abutment block 35 matching the abutment groove 32 is fixedly connected to the top of the second connecting section 30.

[0037] The second dial 4 includes a second rotating shaft 36 rotatably connected to the top of the mounting shell 1, a second pointer 37 connected to the top of the second rotating shaft 36, and a second driving disk 38 connected to the bottom end of the second rotating shaft 36. The bottom end of the second rotating shaft 36 is rotatably connected to the bottom surface of the inner wall of the mounting shell 1. The second driving disk 38 is located between the third driving rod 12 and the fourth driving rod 13. The third driving rod 12 and the fourth driving rod 13 are both rack-shaped. The second driving disk 38 is rotatably connected to the outside with a second outer gear ring 39. The second outer gear ring 39 is respectively meshed with the third driving rod 12 and the fourth driving rod 13 on both sides.

[0038] A transmission structure 40 is provided between the second driving disk 38 and the second outer toothed ring 39. The transmission structure 40 includes an annular groove 41 opened on the peripheral wall of the second driving disk 38, a fixed block 42 fixedly connected to the annular groove 41, and a movable block 43 fixedly connected to the inner wall of the second outer toothed ring 39 and rotatably abutting against the fixed block 42. The movable blocks 43 in the two second dials 4 abut against the two sides of the fixed block 42 respectively.

[0039] A second friction block 44 is slidably sleeved on the second rotating shaft 36, and a truncated cone-shaped abutment groove 32 coaxial with the second rotating shaft 36 is formed at the bottom end of the second friction block 44. A second fixing ring 45 fixedly connected to the inner top surface of the mounting shell 1 is sleeved on the outer periphery of the second rotating shaft 36, and a return torsion spring 34 is provided between the second fixing ring 45 and the second rotating shaft 36. A truncated cone-shaped second abutment block 46 matching the abutment groove 32 is fixedly connected to the second rotating shaft 36.

[0040] The third dial 5 includes a third rotating shaft 47 rotatably connected to the top of the mounting shell 1, a third pointer 48 connected to the top of the third rotating shaft 47, and a transmission gear 49 fixedly connected to the bottom end of the third rotating shaft 47. Both sides of the transmission gear 49 are respectively engaged between the second driving rod 11 and the third driving rod 12, and the bottom end of the third rotating shaft 47 is rotatably connected to the bottom surface of the inner wall of the mounting shell 1.

[0041] The third rotating shaft 47 includes a third connecting section 50 and a fourth connecting section 51. The third connecting section 50 is slidably arranged on the top of the mounting shell 1 and is fixedly connected to a third friction block 52 at the bottom. A truncated cone-shaped abutment groove 32 coaxial with the fourth connecting section 51 is formed at the bottom end of the third friction block 52. A third fixing ring 54 fixedly connected to the inner top surface of the mounting shell 1 is sleeved on the outer periphery of the third connecting section 50. A reset torsion spring 34 is provided between the third fixing ring 54 and the third connecting section 50. A truncated cone-shaped third abutment block 55 matching the abutment groove 32 is fixedly connected to the top of the fourth connecting section 51.

[0042] A clutch 56 is provided in the mounting shell 1 for driving the first friction block 31 to separate from or merge with the first abutment block 35, the second friction block 44 to separate from or merge with the second abutment block 46, and the third friction block 52 to separate from or merge with the third abutment block 55. The clutch 56 comprises a moving plate 57, a force spring 58 disposed between the moving plate 57 and the top surface of the inner wall of the mounting shell 1, a button 59 passing through the bottom surface of the mounting shell 1 is fixedly connected to the bottom surface of the moving plate 57, the moving plate 57 is perpendicular to the first rotating shaft 19, the second rotating shaft 36 and the third rotating shaft 47, the moving plate 57 is provided with connecting holes 60 corresponding to the first rotating shaft 19, the second rotating shaft 36 and the third rotating shaft 47, and the peripheral walls of the first friction block 31, the second friction block 44 and the third friction block 52 are all provided with connecting annular grooves 61, and the first friction block 31, the second friction block 44 and the third friction block 52 are all rotatably connected to the connecting annular grooves 61 through the connecting annular grooves 61.

[0043] By respectively arranging the first friction block 31 and the first abutment block 35 on the first dial 3, respectively arranging the second friction block 44 and the second abutment block 46 on the second dial 4, respectively arranging the third friction block 52 and the third abutment block 55 on the third dial 5, and driving the first friction block 31, the second friction block 44 and the third friction block 52 to clutch the first abutment block 35, the second abutment block 46 and the third abutment block 55 respectively through the clutch 56, when the first friction block 31 is separated from the first abutment block 35, the first connecting section 29 resets the first pointer 20 to zero under the action of the reset torsion spring 34, when the second friction block 44 is separated from the second abutment block 46, the second rotating shaft 36 resets the second pointer 37 to zero under the action of the reset torsion spring 34, when the third friction block 52 is separated from the third abutment block 55, the third connecting section 50 resets the third pointer 48 to zero under the action of the reset torsion spring 34, that is, pressing the movable plate 57 can reset all dials to zero, which is convenient to use.

[0044] The implementation principle of the present invention is: When in use, the two detection plates 2 are pressed together to shrink the pressure spring 14 inside the mounting shell 1, and then inserted into the expansion joint that needs to be detected. When the expansion joint expands or contracts, the detection plate 2 moves accordingly, driving the first drive rod 10, the second drive rod 11, the third drive rod 12 and the fourth drive rod 13 to move relative to each other. The first dial 3 located between the first drive rod 10 and the second drive rod 11 converts the linear motion of the expansion joint into a unidirectional rotation on the first dial 3 through the one-way transmission device 24. Since the transmission directions of the one-way transmission devices 24 in the two first dials 3 are different, the two first dials 3 can respectively reflect the expansion motion and contraction motion of the expansion joint, and the total displacement of the motion is superimposed and reflected on the first dial 3. The second dial 4 between the rods 13 converts the linear movement of the expansion joint into a unidirectional rotation on the second dial 4 through the transmission structure 40. Similarly, since the moving blocks 43 of the transmission structure 40 in the two second dials 4 abut in different directions, the two second dials 4 respectively reflect the expansion movement and contraction movement of the expansion joint, and the maximum displacement of the movement is recorded on the second dial 4. The third dial 5 located between the second drive rod 11 and the third drive rod 12 directly reflects the current expansion or expansion amount relative to the initial state through the transmission gear 49. The staff can also directly measure the width of the expansion joint through the spacing between the two detection plates 2. Through the four data, the movement state and activity level of the expansion joint in the past certain period of time can be calculated, so as to carry out timely and effective management in a targeted manner.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A quantitative detection device for expansion joint changes in hydraulic engineering, characterized by: It comprises a mounting shell (1), a pair of detection plates (2) arranged at the bottom of the mounting shell (1), and two first dials (3) arranged at the top of the mounting shell (1); Wherein, a pair of the detection plates (2) are parallel to each other, a first slide groove (6) and a second slide groove (7) are respectively opened at the bottom of the mounting shell (1) and are connected to the inside thereof, a first driving rod (10) and a second driving rod (11) are respectively slidably connected in the first slide groove (6) and the second slide groove (7), the first driving rod (10) and the second driving rod (11) are parallel to each other, the two detection plates (2) are respectively fixedly connected to the first driving rod (10) and the second driving rod (11), and a pressure spring (14) is provided between the first driving rod (10) and the second driving rod (11) on the inner wall of the mounting shell (1); The first dial (3) comprises a first rotating shaft (19) rotatably connected to the top of the mounting shell (1), a first pointer (20) connected to the top of the first rotating shaft (19), and a first driving disk (21) connected to the bottom of the first rotating shaft (19); the bottom of the first rotating shaft (19) is rotatably connected to the bottom surface of the inner wall of the mounting shell (1); a damping ring (22) is provided between the first rotating shaft (19) and the bottom surface of the inner wall of the mounting shell (1); the first driving disk (21) is located between the first driving rod (10) and the first driving rod (10). The first driving rod (10) and the second driving rod (11) are both in the shape of a rack, the first driving disc (21) is externally rotatably connected with a first outer toothed ring (23), the first outer toothed ring (23) is respectively meshed with the first driving rod (10) and the second driving rod (11), a one-way transmission device (24) is arranged between the first driving disc (21) and the first outer toothed ring (23), and the one-way transmission devices (24) arranged in the two first dials (3) have opposite transmission directions.

2. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 1, characterized in that: The first rotating shaft (19) comprises a first connecting section (29) and a second connecting section (30); the first connecting section (29) is slidably arranged on the top of the mounting shell (1) and is fixedly connected to a first friction block (31) at the bottom; a truncated cone-shaped abutting groove (32) coaxial with the second connecting section (30) is provided at the bottom end of the first friction block (31); a first fixing ring (33) fixedly connected to the inner top surface of the mounting shell (1) is sleeved on the outer periphery of the first connecting section (29); a return torsion spring (34) is arranged between the first fixing ring (33) and the first connecting section (29); and a truncated cone-shaped first abutting block (35) matched with the abutting groove (32) is fixedly connected to the top end of the second connecting section (30); A clutch component (56) for driving the first friction block (31) and the first abutment block (35) to separate or merge is provided in the mounting shell (1).

3. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 1 is characterized in that: The one-way transmission (24) comprises a plurality of friction members (25) provided on the inner wall of the first outer gear ring (23), the friction members (25) comprising a mounting groove (26) provided on the inner wall of the first outer gear ring (23), a contact ball (27) provided in the mounting groove (26), and a support spring (28) provided at one end of the mounting groove (26) and contacting the contact ball (27), the mounting groove (26) gradually becoming shallower from one end toward the other end, and when the contact ball (27) moves toward the other end of the mounting groove (26) where the depth is shallower, it contacting the outer peripheral wall of the first driving disk (21).

4. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 2, characterized in that: The top of the mounting shell (1) is also provided with two second dials (4); the bottom of the mounting shell (1) is respectively provided with a third slide groove (8) and a fourth slide groove (9) which are connected to the inside thereof; the third slide groove (8) and the fourth slide groove (9) are respectively slidably connected with a third driving rod (12) and a fourth driving rod (13); the third driving rod (12) and the fourth driving rod (13) are parallel to each other; the two detection plates (2) are respectively fixedly connected to the third driving rod (12) and the fourth driving rod (13); and a pressure spring (14) is provided between the inner wall of the mounting shell (1) and the third driving rod (12) and the fourth driving rod (13); The second dial (4) comprises a second rotating shaft (36) rotatably connected to the top of the mounting shell (1), a second pointer (37) connected to the top of the second rotating shaft (36), and a second driving disk (38) connected to the bottom of the second rotating shaft (36); the bottom of the second rotating shaft (36) is rotatably connected to the bottom surface of the inner wall of the mounting shell (1); the second driving disk (38) is located between the third driving rod (12) and the fourth driving rod (13); the third driving rod (12) and the fourth driving rod (13) are both rack-shaped; the second driving disk (38) is rotatably connected to a second outer toothed ring (39) on the outside; the second outer toothed ring (39) is respectively meshed with the third driving rod (12) and the fourth driving rod (13) on both sides; a transmission structure (40) is provided between the second driving disk (38) and the second outer toothed ring (39); The transmission structure (40) comprises an annular groove (41) formed on the peripheral wall of the second driving disk (38), a fixed block (42) fixedly connected to the annular groove (41), and a moving block (43) fixedly connected to the inner wall of the second outer gear ring (39) and rotatably abutting against the fixed block (42); the moving blocks (43) in the two second dials (4) respectively abut against two sides of the fixed block (42).

5. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 4, characterized in that: A second friction block (44) is slidably sleeved on the second rotating shaft (36); a truncated cone-shaped abutting groove (32) coaxial with the second rotating shaft (36) is provided at the bottom end of the second friction block (44); a second fixing ring (45) fixedly connected to the inner top surface of the mounting shell (1) is sleeved on the outer periphery of the second rotating shaft (36); a return torsion spring (34) is provided between the second fixing ring (45) and the second rotating shaft (36); and a truncated cone-shaped second abutting block (46) matched with the abutting groove (32) is fixedly connected to the second rotating shaft (36); A clutch component (56) for driving the second friction block (44) and the second abutment block (46) to separate or merge is provided in the mounting shell (1).

6. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 5, characterized in that: A third dial (5) is also provided on the top of the mounting shell (1), and the third dial (5) comprises a third rotating shaft (47) rotatably connected to the top of the mounting shell (1), a third pointer (48) connected to the top of the third rotating shaft (47), and a transmission gear (49) fixedly connected to the bottom end of the third rotating shaft (47), the two sides of the transmission gear (49) are respectively engaged between the second driving rod (11) and the third driving rod (12), and the bottom end of the third rotating shaft (47) is rotatably connected to the bottom surface of the inner wall of the mounting shell (1).

7. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 6, characterized in that: The third rotating shaft (47) comprises a third connecting section (50) and a fourth connecting section (51); the third connecting section (50) is slidably arranged on the top of the mounting shell (1) and is fixedly connected to a third friction block (52) at the bottom; a truncated cone-shaped abutting groove (32) coaxial with the fourth connecting section (51) is provided at the bottom end of the third friction block (52); a third fixing ring (54) fixedly connected to the inner top surface of the mounting shell (1) is sleeved on the outer periphery of the third connecting section (50); a return torsion spring (34) is arranged between the third fixing ring (54) and the third connecting section (50); and a truncated cone-shaped third abutting block (55) matched with the abutting groove (32) is fixedly connected to the top of the fourth connecting section (51); A clutch component (56) for driving the third friction block (52) and the third abutment block (55) to separate or merge is provided in the mounting shell (1).

8. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 7, characterized in that: The clutch member (56) comprises a movable plate (57), a force spring (58) arranged between the movable plate (57) and the top surface of the inner wall of the mounting shell (1); the bottom surface of the movable plate (57) is fixedly connected with a button (59) passing through the bottom surface of the mounting shell (1); the movable plate (57) is perpendicular to the first rotating shaft (19), the second rotating shaft (36) and the third rotating shaft (47); the movable plate (57) is provided with connecting holes (60) corresponding to the first rotating shaft (19), the second rotating shaft (36) and the third rotating shaft (47) respectively; the peripheral walls of the first friction block (31), the second friction block (44) and the third friction block (52) are all provided with connecting ring grooves (61); the first friction block (31), the second friction block (44) and the third friction block (52) are all rotatably connected to the connecting ring grooves (61) through the connecting ring grooves (61).

9. The quantitative detection device for expansion joint changes in hydraulic engineering according to claim 4, characterized in that: The first driving rod (10), the second driving rod (11), the third driving rod (12) and the fourth driving rod (13) are each provided with a sliding groove (15) with a dovetail-shaped cross section at the bottom, and the top of the detection plate (2) is respectively fixedly connected with a sliding plate (16) matched with the sliding groove (15), wherein the sliding plate (16) at the top of one detection plate (2) is respectively slidably connected to the first driving rod (10) and the third driving rod (12), and the sliding plate (16) at the top of the other detection plate (2) is respectively slidably connected to the second driving rod (11) and the fourth driving rod (13), and the sliding plates (16) are each provided with a threaded hole (17), and the threaded hole (17) is internally threadedly connected with a fastening bolt (18) abutting against the inner wall of the sliding groove (15).

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