Concrete crack detection device for water transportation engineering construction

Abstract

The invention discloses a concrete crack detection device for water transportation engineering construction, and aims to solve the problems that in existing square concrete column crack detection, probes need to be held by both hands to make contact with concrete columns, but a test host can only be hung on the neck, so that the numerical value cannot be accurately observed, and the detection time is shortened. And the use effect is not good. The concrete crack detection device comprises a bottom plate, the bottom end of the front surface of the bottom plate is fixedly connected with a detection host, the top end of the front surface of the bottom plate is fixedly connected with a fixed box, and the left and right sides of the fixed box are provided with two movable cylinders through adjusting assemblies. The adjusting assembly can drive the movable plate and the movable cylinder to get close to the middle until the movable cylinder drives the clamping plate and the non-slip mat to make contact with the concrete column and be pressed and fixed, so that the detection host is supported and fixed, workers do not need to lift the detection host during measurement, meanwhile, the detection probe can be adjusted to different positions, and the detection efficiency is improved. And the use is very convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete crack detection, and in particular relates to a concrete crack detection device for water transport engineering construction. Background Art

[0002] Water transport engineering refers to port engineering, waterway engineering, navigation engineering, navigation building engineering, ship repair and construction hydraulic engineering engineering, installation engineering and support systems and their auxiliary and ancillary projects. In the construction process of water transport engineering, a large number of square concrete columns will be used. The appearance of cracks in concrete is a major hazard to the structure. On the one hand, the development of cracks leads to a decrease in structural stiffness and an increase in brittleness, which reduces the performance of the structure. On the other hand, it may accelerate the aging effect of the environment on the structure, cause the surface protective layer to peel off, and affect the durability of the structure. Detection of concrete cracks is an important part of acceptance.

[0003] The existing square concrete column crack detection uses ultrasonic single-sided flat measurement as the most common non-destructive testing method. During the detection, two probes are placed on the concrete surface on both sides of the crack for measurement. It is necessary to hold a probe in each hand to contact the concrete column, but the test host can only be hung around the neck, so it is impossible to accurately view its value, and the use effect is not good. Summary of the invention

[0004] (1) Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a concrete crack detection device for water transport engineering construction, which aims to solve the technical problem that the existing square concrete column crack detection requires each hand to hold a probe to contact the concrete column, but the test host can only be hung around the neck, so it is impossible to accurately view its value, resulting in poor use effect.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides such a concrete crack detection device for water transport engineering construction, the concrete crack detection device comprises a bottom plate, a detection host is fixedly connected to the bottom end of the front side of the bottom plate, a fixed box is fixedly connected to the top end of the front side of the bottom plate, two movable cylinders are arranged on the left and right sides of the fixed box through an adjustment component, a clamping plate is fixedly connected to the side of the movable cylinder away from the fixed box, and movable blocks are slidably connected to the left and right sides of the front side of the fixed box, a vertical plate is plugged into the movable block, and a limit assembly is arranged on one side of the movable block, and the limit assembly is used to limit the movement of the movable block and the vertical plate;

[0008] The top of the vertical plate is fixedly connected to a fixed seat, and a rotating column is rotatably connected to the fixed seat through a positioning assembly. Two sliding rods are movably inserted on the rotating column. One end of the sliding rod is fixedly connected to the vertical rod, and the other end of the sliding rod is fixedly connected to a mounting frame. The mounting frame is fixedly connected to a detection probe, and the outer surface of the sliding rod is sleeved with a first spring.

[0009] Preferably, a handle is fixedly connected to the middle of the front side of the bottom plate, and the handle is located between the detection host and the fixed box.

[0010] Furthermore, through holes are opened on the left and right sides of the fixed box, the movable cylinder is slidably connected inside the through hole, one end of the movable cylinder located inside the through hole is fixedly connected with a movable plate, and the movable plate is slidably connected inside the fixed box.

[0011] Furthermore, the adjustment assembly includes a first handle arranged on the front side of the fixed box, the other end of the first handle is located inside the fixed box and fixedly connected to a worm, the worm is rotatably connected to the fixed box through a bearing, a partition is fixedly connected to the inside of the fixed box, and a first screw rod is rotatably connected to the partition through a bearing, the thread directions on the left and right sides of the first screw rod are opposite, the left and right ends of the first screw rod respectively pass through the left and right movable plates, the first screw rod is threadedly connected to the movable plate, and the outer surface of the first screw rod is fixedly connected to a worm wheel meshing with the worm.

[0012] Furthermore, a non-slip pad is fixedly connected to one side of the clamping plate close to the fixed box, and the non-slip pad is made of rubber.

[0013] Furthermore, the upper and lower sides of the back of the movable block are fixedly connected with sliders, the upper and lower sides of the front of the fixed box are fixedly connected with guide rails, and the sliders are slidably connected to the guide rails.

[0014] Furthermore, the limit assembly includes a cavity opened inside the movable block, a movable rod is slidably inserted on the left side of the movable block, one end of the movable rod is fixedly connected to the second handle, the other end of the movable rod is located inside the cavity and fixedly connected to the limit block, the outer surface of the movable rod located inside the cavity is sleeved with a second spring, the two ends of the limit block are rotatably connected to two transmission rods through pins, the other ends of the two transmission rods are rotatably connected to two push rods, and the two push rods are respectively tightened to the fixed box and the vertical plate.

[0015] Furthermore, the positioning assembly includes two cross bars fixedly connected to one side of the rotating column, the other end of the cross bar passes through the vertical bar and is fixedly connected to a round bar, the cross bar is slidably connected to the vertical bar, the lower surface of the lower sliding bar is fixedly connected to an L-shaped positioning rod, the upper surface of the fixed seat is provided with a mounting groove, the rotating column is rotatably connected to the inside of the mounting groove through a bearing, and the inside of the mounting groove is provided with two first positioning grooves and a second positioning groove that are compatible with the L-shaped positioning rod.

[0016] Furthermore, the first positioning groove and the second positioning groove are arranged at 90 degrees, the first positioning groove is located on the side where the two installation grooves are close to each other, and the second positioning groove is located on the rear inner wall of the installation groove.

[0017] Furthermore, a mounting hole is opened in the middle of the mounting frame, the detection probe is located inside the mounting hole, and a positioning screw is threadedly connected to the front of the mounting frame, and the positioning screw is tightly pressed against the outer surface of the detection probe.

[0018] (3) Beneficial effects

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention drives the worm to rotate by turning the first handle. During the rotation process, the worm cooperates with the worm wheel to drive the first screw to rotate. During the rotation process, the first screw can drive the movable plate and the movable cylinder to approach the middle until the movable cylinder drives the clamping plate and the anti-skid pad to contact the concrete column and press and fix them, thereby supporting and fixing the detection host, eliminating the need for staff to lift the detection host during measurement, and the detection probe can be adjusted to different positions, which is very convenient to use.

[0021] In the above scheme, the device is fixed to the concrete column by two clamping plates, and then the second handle is pressed to drive the movable rod and the limit block to slide and stretch the second spring. During the movement of the limit block, the top rods on both sides can be driven to move through the transmission rod, thereby releasing the limit on the movable block and the vertical plate. At this time, the movable block can drive the slider to slide left and right along the guide rail, and the vertical plate can move up and down along the movable block, thereby realizing all-round measurement of the detection probe on the concrete and significantly increasing the measurement area.

[0022] In the above scheme, when in use, the left and right detection probes can be fitted together for correction, and then the round rod and vertical rod on the left are held and force is applied. At this time, the vertical rod drives the sliding rod, the mounting frame and the detection probe to move and compress the first spring. At the same time, the sliding rod can drive the L-shaped positioning rod to disengage from the first positioning groove during the movement. Then it is rotated around the rotating column to a vertical state, and the detection probe is moved to the detection position. At this time, the round rod and the vertical rod are released, and the restoring force of the first spring drives the L-shaped positioning rod to engage with the second positioning groove. At the same time, the detection probe contacts the concrete column, so that the detection probe will only contact the concrete column when in use. When the device is installed, the detection probe is in a horizontal state and no friction occurs, and it will not block the line of sight, so it is better to find the crack point for measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of a concrete crack detection device for water transport engineering construction;

[0024] Figure 2It is a front view structural diagram of a concrete crack detection device for water transport engineering construction;

[0025] Figure 3 It is a top view cross-sectional structural diagram of a concrete crack detection device for water transport engineering construction;

[0026] Figure 4 Concrete crack detection device for water transport engineering construction Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0027] Figure 5 Concrete crack detection device for water transport engineering construction Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 6 Concrete crack detection device for water transport engineering construction Figure 3 Schematic diagram of the enlarged structure at C in the middle;

[0029] Figure 7 This is a schematic diagram of the structure of the detection probe of the concrete crack detection device for water transport engineering construction when in use;

[0030] Figure 8 Concrete crack detection device for water transport engineering construction Figure 7 Schematic diagram of the top view structure in;

[0031] Fig. 9 This is a schematic diagram of the structure of the positioning component of the concrete crack detection device used in water transport engineering construction.

[0032] The marks in the attached drawings are: 1, bottom plate; 2, detection host; 3, fixed box; 4, adjustment component; 5, movable cylinder; 6, clamping plate; 7, movable block; 8, vertical plate; 9, limit component; 10, fixed seat; 11, positioning component; 12, rotating column; 13, sliding rod; 14, vertical rod; 15, mounting frame; 16, detection probe; 17, first spring; 101, grip; 301, through hole; 401, first handle; 402, worm; 403, partition; 404, first screw; 40 5. Worm gear; 501. movable plate; 601. anti-slip pad; 701. slider; 702. guide rail; 901. cavity; 902. movable rod; 903. second handle; 904. limit block; 905. transmission rod; 906. push rod; 907. second spring; 1101. cross bar; 1102. round rod; 1103. L-shaped positioning rod; 1104. mounting groove; 1105. first positioning groove; 1106. second positioning groove; 1501. mounting hole; 1502. positioning screw. DETAILED DESCRIPTION

[0033] This specific implementation method is a concrete crack detection device for water transport engineering construction, and its structural schematic diagram is as follows Figure 1-Figure 9 As shown, the concrete crack detection device comprises a bottom plate 1, a detection host 2 is fixedly connected to the bottom end of the front side of the bottom plate 1, a fixed box 3 is fixedly connected to the top end of the front side of the bottom plate 1, two movable cylinders 5 are arranged on the left and right sides of the fixed box 3 through an adjustment component 4, a clamping plate 6 is fixedly connected to the side of the movable cylinder 5 away from the fixed box 3, and movable blocks 7 are slidably connected to the left and right sides of the front side of the fixed box 3, a vertical plate 8 is plugged into the movable block 7, and a limiting component 9 is arranged on one side of the movable block 7, and the limiting component 9 is used to limit the movement of the movable block 7 and the vertical plate 8;

[0034] The top of the vertical plate 8 is fixedly connected to a fixed seat 10, and a rotating column 12 is rotatably connected to the fixed seat 10 through a positioning assembly 11. Two sliding rods 13 are movably inserted on the rotating column 12, one end of the sliding rod 13 is fixedly connected to a vertical rod 14, and the other end of the sliding rod 13 is fixedly connected to a mounting frame 15, and a detection probe 16 is fixedly connected to the mounting frame 15. The outer surface of the sliding rod 13 is sleeved with a first spring 17, and the detection host 2 is electrically connected to the detection probe 16, which is not shown in the figure.

[0035] like Figure 1 As shown, in this embodiment, a handle 101 is fixedly connected to the middle of the front side of the base plate 1, and the handle 101 is located between the detection host 2 and the fixed box 3. This arrangement makes it more convenient to place the device on the square concrete column that needs to be detected through the handle 101.

[0036] like Figure 1 and Figure 3 As shown, in this embodiment, through holes 301 are opened on the left and right sides of the fixed box 3, the movable cylinder 5 is slidably connected to the inside of the through hole 301, and one end of the movable cylinder 5 located inside the through hole 301 is fixedly connected to a movable plate 501, and the movable plate 501 is slidably connected to the inside of the fixed box 3. The adjustment component 4 includes a first handle 401 arranged on the front side of the fixed box 3, and the other end of the first handle 401 is located inside the fixed box 3 and fixedly connected to a worm 402, and the worm 402 is rotatably connected to the fixed box 3 through a bearing, and a partition 403 is fixedly connected to the inside of the fixed box 3, and a first screw rod 404 is rotatably connected to the partition 403 through a bearing, and the left and right sides of the first screw rod 404 have opposite thread directions, and the left and right ends of the first screw rod 404 respectively pass through the left and right movable plates 501, and the first screw rod 404 is threadedly connected to the movable plate 501, and the outer surface of the first screw rod 404 is fixedly connected to a worm wheel 405 meshing with the worm 402.

[0037] In this way, rotating the first handle 401 drives the worm 402 to rotate. During the rotation, the worm 402 cooperates with the worm wheel 405 to drive the first screw 404 to rotate. During the rotation, the first screw 404 can drive the two movable plates 501 and the movable cylinder 5 to move closer to the middle until the movable cylinder 5 drives the splint 6 and the anti-slip pad 601 to contact the concrete column and press it tightly.

[0038] like Figure 2 and Figure 3 As shown, in this embodiment, a side of the clamping plate 6 close to the fixing box 3 is fixedly connected with an anti-skid pad 601, and the anti-skid pad 601 is made of rubber. The anti-skid pad 601 is provided to increase the friction between the clamping plate 6 and the concrete column, so as to better fix the device.

[0039] like Figure 1 and Figure 2 As shown, in this embodiment, the upper and lower sides of the back of the movable block 7 are fixedly connected with sliders 701, the upper and lower sides of the front of the fixed box 3 are fixedly connected with guide rails 702, and the sliders 701 are slidably connected to the guide rails 702.

[0040] The movable block 7 is arranged in this way to drive the slider 701 to slide left and right along the guide rail 702 , and the vertical plate 8 moves up and down along the movable block 7 .

[0041] like Figure 3 and Figure 6 As shown, in the present embodiment, the limit assembly 9 includes a cavity 901 opened inside the movable block 7, a movable rod 902 is slidably inserted on the left side of the movable block 7, one end of the movable rod 902 is fixedly connected to a second handle 903, the other end of the movable rod 902 is located inside the cavity 901 and is fixedly connected to a limit block 904, the outer surface of the movable rod 902 located inside the cavity 901 is sleeved with a second spring 907, both ends of the limit block 904 are rotatably connected to two transmission rods 905 through pins, the other ends of the two transmission rods 905 are rotatably connected to two push rods 906, and the two push rods 906 are respectively tightened to the fixed box 3 and the vertical plate 8.

[0042] In this way, pressing the second handle 903 on the left side drives the movable rod 902 and the limit block 904 to slide and stretch the second spring 907. During the movement of the limit block 904, the transmission rod 905 can drive the top rods 906 on both sides to move, thereby releasing the limit on the movable block 7 and the vertical plate 8.

[0043] like Figure 1 , Figure 7 and Fig. 9As shown, in this embodiment, the positioning assembly 11 includes two cross bars 1101 fixedly connected to one side of the rotating column 12, the other end of the cross bar 1101 passes through the vertical bar 14 and is fixedly connected to the round bar 1102, the cross bar 1101 is slidably connected to the vertical bar 14, the lower surface of the lower sliding bar 13 is fixedly connected to an L-shaped positioning rod 1103, the upper surface of the fixed seat 10 is provided with a mounting groove 1104, the rotating column 12 is rotatably connected to the inside of the mounting groove 1104 through a bearing, and the inside of the mounting groove 1104 is provided with two first positioning grooves 1105 and second positioning grooves 1106 that are compatible with the L-shaped positioning rod 1103, the first positioning groove 1105 and the second positioning groove 1106 are set at 90 degrees, the first positioning groove 1105 is located on the side close to the two mounting grooves 1104, and the second positioning groove 1106 is located on the rear inner wall of the mounting groove 1104.

[0044] In this way, the round rod 1102 and the vertical rod 14 are held and applied force. At this time, the vertical rod 14 drives the sliding rod 13, the mounting frame 15 and the detection probe 16 to move and compress the first spring 17, and the L-shaped positioning rod 1103 is disengaged from the first positioning groove 1105. Then it is rotated around the rotating column 12 to a vertical state, and the round rod 1102 and the vertical rod 14 are released. The restoring force of the first spring 17 drives the L-shaped positioning rod 1103 to engage with the second positioning groove 1106, so that the detection probe 16 can contact with the concrete column.

[0045] like Fig. 9 As shown, in this embodiment, a mounting hole 1501 is opened in the middle of the mounting frame 15, and the detection probe 16 is located inside the mounting hole 1501. A positioning screw 1502 is threadedly connected to the front of the mounting frame 15, and the positioning screw 1502 is tightly pressed against the outer surface of the detection probe 16. This arrangement facilitates the installation and fixation of the detection probe 16.

[0046] The technical solution provided by the present invention is that when in use, the device is placed on the square concrete column to be inspected through the handle 101, so that the clamping plates 6 are located on both sides of the concrete column, and then the first handle 401 is turned to drive the worm 402 to rotate. During the rotation process, the worm 402 cooperates with the worm wheel 405 to drive the first screw 404 to rotate. Since the threads on the left and right sides of the first screw 404 are in opposite directions, the first screw 404 can drive the two movable plates 501 and the movable cylinder 5 to move closer to the middle during the rotation process until the movable cylinder 5 is brought The movable clamping plate 6 and the anti-skid pad 601 are in contact with the concrete column and pressed and fixed. At this time, since the detection probe 16 rotates to a horizontal state, it will not rub against the concrete column. Then, the coupling agent is applied to the detection probe 16 on the left side. Then, one hand presses the second handle 903 on the left side to drive the movable rod 902 and the limit block 904 to slide and stretch the second spring 907. During the movement, the limit block 904 can drive the top rods 906 on both sides to move through the transmission rod 905, thereby releasing the limit on the movable block 7 and the vertical plate 8. At this time, The movable block 7 drives the slider 701 to slide left and right along the guide rail 702, and the vertical plate 8 moves up and down along the movable block 7, so that the left and right detection probes 16 can be easily fitted together for correction. Then, the other hand holds the round rod 1102 and the vertical rod 14 on the left and applies force. At this time, the vertical rod 14 drives the slide bar 13, the mounting frame 15 and the detection probe 16 to move and compress the first spring 17. At the same time, the slide bar 13 can drive the L-shaped positioning rod 1103 to disengage from the first positioning groove 1105 during the movement, and then rotate it around the rotating column 12 Rotate to a vertical state and move the detection probe 16 to the detection position. At this time, release the round rod 1102 and the vertical rod 14. The restoring force of the first spring 17 drives the L-shaped positioning rod 1103 to engage with the second positioning groove 1106. At the same time, the detection probe 16 contacts the concrete column. Then release the second handle 903 on the left. The restoring force of the second spring 907 causes the push rod 906 to press the movable block 7 and the vertical plate 8 to limit the position. Then, according to the above method, the detection probe 16 on the right is brought into contact with another point of the concrete column for measurement.

[0047] All technical features in this embodiment can be freely combined according to actual needs.

[0048] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A concrete crack detection device for water transport engineering construction, characterized in that: The concrete crack detection device comprises a bottom plate (1), the bottom end of the front side of the bottom plate (1) is fixedly connected to a detection host (2), the top end of the front side of the bottom plate (1) is fixedly connected to a fixed box (3), the left and right sides of the fixed box (3) are provided with two movable cylinders (5) through an adjustment component (4), the side of the movable cylinder (5) away from the fixed box (3) is fixedly connected to a clamping plate (6), the left and right sides of the front side of the fixed box (3) are both slidably connected to movable blocks (7), the movable blocks (7) are plugged with vertical plates (8), and a limiting component (9) is provided on one side of the movable block (7), and the limiting component (9) is used to limit the movement of the movable block (7) and the vertical plate (8); The top end of the vertical plate (8) is fixedly connected to a fixed seat (10), and a rotating column (12) is rotatably connected to the fixed seat (10) through a positioning assembly (11). Two sliding rods (13) are movably inserted on the rotating column (12), one end of the sliding rod (13) is fixedly connected to a vertical rod (14), and the other end of the sliding rod (13) is fixedly connected to a mounting frame (15), and a detection probe (16) is fixedly connected to the mounting frame (15), and a first spring (17) is sleeved on the outer surface of the sliding rod (13).

2. The concrete crack detection device for water transport engineering construction according to claim 1 is characterized in that: A handle (101) is fixedly connected to the middle of the front side of the bottom plate (1), and the handle (101) is located between the detection host (2) and the fixing box (3).

3. The concrete crack detection device for water transport engineering construction according to claim 2 is characterized in that: The fixed box (3) is provided with through holes (301) on both sides thereof, the movable cylinder (5) is slidably connected inside the through hole (301), one end of the movable cylinder (5) located inside the through hole (301) is fixedly connected with a movable plate (501), and the movable plate (501) is slidably connected inside the fixed box (3).

4. The concrete crack detection device for water transport engineering construction according to claim 3 is characterized in that: The adjustment assembly (4) comprises a first handle (401) arranged on the front side of the fixed box (3); the other end of the first handle (401) is located inside the fixed box (3) and fixedly connected to a worm (402); the worm (402) is rotatably connected to the fixed box (3) via a bearing; a partition (403) is fixedly connected inside the fixed box (3); a first screw (404) is rotatably connected to the partition (403) via a bearing; the threads on the left and right sides of the first screw (404) are in opposite directions; the left and right ends of the first screw (404) respectively pass through the left and right movable plates (501); the first screw (404) is threadedly connected to the movable plate (501); and the outer surface of the first screw (404) is fixedly connected to a worm wheel (405) meshing with the worm (402).

5. The concrete crack detection device for water transport engineering construction according to claim 4 is characterized in that: A side of the clamping plate (6) close to the fixed box (3) is fixedly connected with an anti-skid pad (601), and the anti-skid pad (601) is made of rubber.

6. The concrete crack detection device for water transport engineering construction according to claim 5 is characterized in that: The upper and lower sides of the back of the movable block (7) are fixedly connected with sliders (701), the upper and lower sides of the front of the fixed box (3) are fixedly connected with guide rails (702), and the sliders (701) are slidably connected to the guide rails (702).

7. The concrete crack detection device for water transport engineering construction according to claim 1 is characterized in that: The limit assembly (9) comprises a cavity (901) opened inside the movable block (7); a movable rod (902) is slidably inserted on the left side of the movable block (7); one end of the movable rod (902) is fixedly connected to a second handle (903); the other end of the movable rod (902) is located inside the cavity (901) and fixedly connected to a limit block (904); a second spring (907) is sleeved on the outer surface of the movable rod (902) located inside the cavity (901); two ends of the limit block (904) are rotatably connected to two transmission rods (905) via pins; the other ends of the two transmission rods (905) are rotatably connected to two push rods (906); the two push rods (906) are respectively pressed against the fixed box (3) and the vertical plate (8).

8. The concrete crack detection device for water transport engineering construction according to claim 1 is characterized in that: The positioning assembly (11) comprises two cross bars (1101) fixedly connected to one side of the rotating column (12); the other end of the cross bar (1101) passes through the vertical bar (14) and is fixedly connected to a round bar (1102); the cross bar (1101) is slidably connected to the vertical bar (14); the lower surface of the lower sliding bar (13) is fixedly connected to an L-shaped positioning bar (1103); the upper surface of the fixed seat (10) is provided with a mounting groove (1104); the rotating column (12) is rotatably connected to the inside of the mounting groove (1104) through a bearing; the inside of the mounting groove (1104) is provided with two first positioning grooves (1105) and a second positioning groove (1106) adapted to the L-shaped positioning rod (1103).

9. The concrete crack detection device for water transport engineering construction according to claim 8, characterized in that: The first positioning groove (1105) and the second positioning groove (1106) are arranged at 90 degrees, the first positioning groove (1105) is located on the side where the two installation grooves (1104) are close to each other, and the second positioning groove (1106) is located on the rear inner wall of the installation groove (1104).

10. The concrete crack detection device for water transport engineering construction according to claim 9, characterized in that: A mounting hole (1501) is provided in the middle of the mounting frame (15), the detection probe (16) is located inside the mounting hole (1501), and a positioning screw (1502) is threadedly connected to the front surface of the mounting frame (15), and the positioning screw (1502) is tightly pressed against the outer surface of the detection probe (16).

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