Movable contact type ultrasonic transmission detection device

Abstract

The invention relates to the technical field of ultrasonic transmission detection, and discloses a movable contact type ultrasonic transmission detection device which comprises a bottom plate assembly and further comprises a first clamping assembly, an upper fixing assembly, an auxiliary clamping assembly and a moving assembly, the first clamping assembly is installed above the bottom plate assembly, the upper fixing assembly is arranged above the first clamping assembly, and the auxiliary clamping assembly is installed above the bottom plate assembly. The auxiliary clamping assemblies are symmetrically installed on the front side and the rear side of the bottom plate assembly and located on the outer side of the first clamping assembly, and the moving assembly is arranged in the center of the right end of the bottom plate assembly. The transmitting probe body is pushed by the moving assembly and the moving distance of the transmitting probe body is determined, so that the transmitting probe body and the receiving probe body can be always moved to a position at which the amplitude of a received transmission signal reaches the maximum under different transmitting angles during detection; therefore, the acoustic characteristics recorded by the equipment only reflect the objective difference between the inherent material attributes and the structural parameters of the tested workpiece body.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic transmission detection, in particular to a movable contact type ultrasonic transmission detection device. Background Art

[0002] Ultrasonic testing technology is a non-destructive testing method that uses the characteristics of ultrasonic waves propagating in a medium to detect internal defects or structural information of materials. In the industrial field, especially in the manufacturing industry, the quality of materials and components directly affects the safety and reliability of products. Traditional destructive testing methods cannot meet the detection needs of complex structures and internal defects, so non-destructive testing technology came into being.

[0003] In the prior art, ultrasonic testing methods can be classified into pulse reflection method, diffraction time difference method, penetration method and resonance method according to the principle. When the penetration method is used for testing, a dual probe, one transmitting and one receiving, is often used and placed on the two opposite ends of the workpiece. The defects of the workpiece are detected based on the energy change after the pulse wave or continuous wave penetrates the workpiece. When the penetration method is used for testing and the incident angle is inclined, the distance between the transmitting probe body and the receiving probe body is different at different transmitting angles, and the ultrasonic intensity that can be received by the receiving probe body is also different. Therefore, when the test workpiece is incident at an inclined angle due to experimental needs, the transmitting probe body and the receiving probe body must be moved to a position where the amplitude of the received transmission signal reaches the maximum. This calibration operation can effectively eliminate the detection errors introduced by factors such as the incident angle deviation and the probe spacing, and ensure that the acoustic characteristics recorded by the equipment only reflect the objective differences in the inherent material properties (such as acoustic impedance and attenuation coefficient) and structural parameters (such as thickness) of the tested workpiece. Therefore, it is necessary to design a movable contact ultrasonic transmission testing device to solve the above problems. Summary of the invention

[0004] In order to overcome the problem of detection error introduced by factors such as incident angle deviation and probe spacing, the distance between the transmitting probe body and the receiving probe body is different at different transmitting angles, and the ultrasonic intensity that can be received by the receiving probe body is also different.

[0005] The technical scheme of the present invention is as follows: a movable contact ultrasonic transmission detection device includes a base plate assembly, a first clamping assembly, an upper fixed assembly, an auxiliary clamping assembly and a moving assembly, wherein the first clamping assembly is installed above the base plate assembly, the upper fixed assembly is arranged above the first clamping assembly, the auxiliary clamping assembly is symmetrically installed on the front and rear sides of the base plate assembly and is located outside the first clamping assembly, the moving assembly is arranged at the center position of the right end of the base plate assembly, a receiving probe body is arranged above the base plate assembly, a workpiece body is arranged above the receiving probe body, and the moving assembly includes a second fixed seat, a fixed frame, a third threaded rod, a front end plate, a scale plate, a pointer clamp , a first pointer and a second rolling bearing, the second rolling bearing is nested on the third threaded rod, a pointer clamp is fixed on the outer ring of the second rolling bearing, the first pointer is fixed under the pointer clamp, a scale plate is arranged under the first pointer, the third threaded rod is connected to the two fixing frames through threads, one end of the third threaded rod is connected to the front end plate, a transmitting probe body is arranged at the end of the front end plate away from the third threaded rod, the transmitting probe body is arranged on the top of the workpiece body, two second fixing seats are connected to the inner sides of the two fixing frames, a semi-open oblong hole is opened inside the fixing frame, a transmitting probe crystal is arranged inside the transmitting probe body, and a receiving probe crystal is arranged inside the receiving probe body.

[0006] Preferably, the base plate assembly includes a first base plate, a pad, a first stop, a stop connecting plate, a guide column bracket and a column. The pad is installed in the middle of the first base plate. The left side of the pad is fixedly connected to the first stop. A first protrusion is left on the right side of the first stop. A stop connecting plate is fixedly connected above the first stop. Four guide column brackets are symmetrically fixedly connected on the left and right sides of the first base plate. The left front corner and the right rear corner of the first base plate are respectively fixedly connected to the columns. The scale plate is connected to the first base plate, and two second fixed seats are connected to the first base plate.

[0007] Preferably, the first base plate has a first groove extending from left to right, the first stopper has a through hole through which a bolt can pass, the stopper plate has a closed oblong hole at a corresponding position of the through hole, and the pad has a second groove extending from front to back.

[0008] Preferably, the first clamping assembly includes a front vertical plate, a rear vertical plate, a side push plate, a cylindrical top, a first guide column, a bidirectional threaded rod and a first fixed seat. The front vertical plate and the rear vertical plate are both connected to the side push plate and the cylindrical top. The side push plate is fixed to the inner side of the middle part of the front vertical plate and the rear vertical plate. The cylindrical top is fixed to the inner side of the lower left part of the front vertical plate and the rear vertical plate. The four corners of the front vertical plate and the rear vertical plate are connected to four first guide columns. The first guide column is installed on the guide column bracket. The lower middle part of the front vertical plate and the rear vertical plate is connected to a bidirectional threaded rod through a thread. Both ends of the bidirectional threaded rod are connected to the first fixed seat, and the first fixed seat is connected to the first base plate.

[0009] Preferably, the upper fixed component includes a first threaded rod, an upper cover plate, an upper push plate and a first rolling bearing. The first threaded rod is connected to the upper cover plate by a threaded through-connection, the end of the first threaded rod is connected to the first rolling bearing and the upper push plate, and the two ends of the upper cover plate are connected to the column.

[0010] Preferably, the auxiliary clamping assembly includes a side support, a second threaded rod, a base push rod head and a base clamping plate. The side support is connected to the pad, the second threaded rod and the side support are connected by a threaded through-connection, the end of the second threaded rod is connected to the base push rod head by a threaded connection, the base push rod head is in contact with the base clamping plate, and the base clamping plate is placed on the pad.

[0011] Preferably, a second protrusion adapted to the second groove is left at the bottom of the base clamping plate, and the second protrusion slides inside the second groove.

[0012] Beneficial effects of the present invention:

[0013] During detection, the present invention clamps the transmitting probe body, the receiving probe body and the workpiece body through the first clamping component, and aligns the front-to-back directions of the transmitting probe body, the receiving probe body and the workpiece body, thereby limiting the movement of the transmitting probe body, the receiving probe body and the workpiece body in the front-to-back directions. Then, the upper fixing component is used to align the upper and lower directions of the transmitting probe body, the receiving probe body and the workpiece body, and a constant pressure in the vertical direction is provided to the lower transmitting probe body and the workpiece body, thereby reducing the influence of excessively high or too low contact pressure on the amplitude of the transmission signal. Then, the receiving probe body is fixed by the auxiliary clamping component. Finally, the transmitting probe body is pushed by the moving component and the distance moved by the transmitting probe body is determined. Through the design of the moving component, it is ensured that during detection, the transmitting probe body and the receiving probe body can always be moved to the position where the amplitude of the received transmission signal reaches the maximum at different transmitting angles, thereby ensuring that the acoustic characteristics recorded by the equipment only reflect the objective differences in the inherent material properties and structural parameters of the workpiece body under test. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of an embodiment of the ultrasonic transmission detection device of the present invention;

[0015] Figure 2 for Figure 1 A schematic diagram of the structure of the midsole plate assembly;

[0016] Figure 3 for Figure 1 A top view of the first clamping assembly;

[0017] Figure 4 for Figure 1 A right side view of the first clamping assembly;

[0018] Figure 5 for Figure 1 A schematic diagram of the structure of the upper middle fixed component;

[0019] Figure 6 for Figure 1 A schematic diagram of the structure of the auxiliary clamping assembly;

[0020] Figure 7 for Figure 1 A cross-sectional view of the auxiliary clamping assembly;

[0021] Figure 8 for Figure 1 Schematic diagram of the structure of the mobile component;

[0022] Fig. 9 for Figure 1 A schematic diagram of the structure in which the transmitting probe body and the receiving probe body cooperate with each other;

[0023] Fig.10 This is a diagram of the transmission signal amplitude of the ultrasonic transmission detection device of the present invention at different emission angles.

[0024] Description of reference numerals: 11, first bottom plate; 111, first groove; 12, pad; 121, first stopper; 1211, first protrusion; 122, stopper connecting plate; 1221, closed long round hole; 123, second groove; 13, guide column bracket; 14, column; 21, front vertical plate; 22, rear vertical plate; 211, side push plate; 212, cylindrical top; 23, first guide column; 24, bidirectional threaded rod; 25, first fixing seat; 31, first threaded rod; 32, upper Cover plate; 33, upper push plate; 34, first rolling bearing; 41, side support; 42, second threaded rod; 43, base push rod head; 44, base clamp; 441, second protrusion; 51, second fixed seat; 52, fixing frame; 521, semi-open oblong hole; 53, third threaded rod; 54, front end plate; 55, scale plate; 56, pointer clamp; 57, first pointer; 58, second rolling bearing; 6, transmitting probe body; 7, receiving probe body; 8, workpiece body. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0026] See also Figure 1 - Fig. 9The present invention provides an embodiment: a movable contact ultrasonic transmission detection device, including a base plate assembly, a first clamping assembly, an upper fixed assembly, an auxiliary clamping assembly and a moving assembly, the first clamping assembly is installed above the base plate assembly, the upper fixed assembly is arranged above the first clamping assembly, the auxiliary clamping assembly is symmetrically installed on the front and rear sides of the base plate assembly and is located outside the first clamping assembly, the moving assembly is arranged at the center of the right end of the base plate assembly, a receiving probe body 7 is arranged above the base plate assembly, a workpiece body 8 is arranged above the receiving probe body 7, the moving assembly includes a second fixed seat 51, a fixed frame 52, a third screw The threaded rod 53, the front end plate 54, the scale plate 55, the pointer clamp 56, the first pointer 57 and the second rolling bearing 58, the second rolling bearing 58 is nested on the third threaded rod 53, the pointer clamp 56 is fixed to the outer ring of the second rolling bearing 58, the first pointer 57 is fixed below the pointer clamp 56, the scale plate 55 is arranged below the first pointer 57, the third threaded rod 53 is connected to the two fixing frames 52 through a thread, one end of the third threaded rod 53 is connected to the front end plate 54, the end of the front end plate 54 away from the third threaded rod 53 is provided with a transmitting probe body 6, the transmitting probe body 6 is arranged on the top of the workpiece body 8, the inner side of the two fixing frames 52 Two second fixing seats 51 are connected, a semi-open oblong hole 521 is opened inside the fixing frame 52, a transmitting probe crystal is arranged inside the transmitting probe body 6, a receiving probe crystal is arranged inside the receiving probe body 7, a second rolling bearing 58 is nested in the backing groove on the third threaded rod 53, when the third threaded rod 53 is rotated, the second rolling bearing 58 makes the pointer clamp 56 and the first pointer 57 not rotate with the third threaded rod 53, the first pointer 57 always points to the scale plate 55 and moves along the forward direction of the third threaded rod 53, the scale plate 55 is fixed to the right end of the first groove 111 on the first bottom plate 11, and the bottom of the two second fixing seats 51 They are all fixed on the first base plate 11, and are respectively located on the front and rear sides of the right end of the first groove 111. A semi-open oblong hole 521 is opened below the fixing frame 52. The upper and lower positions of the fixing frame 52 can be adjusted by the design of the semi-open oblong hole 521. The design of the two fixing frames 52 can make the third threaded rod 53 more stable during spiral movement. The third threaded rod 53 is pushed to move the first pointer 57 to above the zero scale of the scale plate 55 for zeroing operation. The transmitting probe body 6 is pushed to move by moving the third threaded rod 53, and the scale position of the first pointer 57 on the scale plate 55 is recorded, thereby determining the distance moved by the transmitting probe body 6.

[0027] The working mechanism of the movable contact type ultrasonic transmission detection device provided in this embodiment is as follows:

[0028] During detection, the present invention clamps the transmitting probe body 6, the receiving probe body 7, and the workpiece body 8 through the first clamping component, and aligns the front-to-back directions of the transmitting probe body 6, the receiving probe body 7, and the workpiece body 8, thereby limiting the movement of the transmitting probe body 6, the receiving probe body 7, and the workpiece body 8 in the front-to-back directions. Then, the upper fixing component is used to align the upper and lower directions of the transmitting probe body 6, the receiving probe body 7, and the workpiece body 8, and a constant pressure in the vertical direction is provided to the lower transmitting probe body 6 and the workpiece body 8 to reduce the influence of excessively high or too low contact pressure on the amplitude of the transmission signal. Then, the receiving probe body 7 is fixed by an auxiliary clamping component. Finally, the transmitting probe body 6 is pushed by the moving component and the distance moved by the transmitting probe body 6 is determined. Through the design of the moving component, it is ensured that during detection, the transmitting probe body 6 and the receiving probe body 7 can always be moved to a position where the amplitude of the received transmission signal reaches the maximum at different transmitting angles, thereby ensuring that the acoustic characteristics recorded by the equipment only reflect the objective differences in the inherent material properties and structural parameters of the workpiece body 8 being tested.

[0029] See also Figure 1 , Figure 2 , Figure 8 and Fig. 9 In this embodiment, the bottom plate assembly includes a first bottom plate 11, a pad 12, a first stopper 121, a stopper connecting plate 122, a guide column bracket 13, and a column 14. The pad 12 is installed in the middle of the first bottom plate 11. The left side of the pad 12 is fixedly connected to the first stopper 121, and the stopper connecting plate 122 is fixedly connected above the first stopper 121. Four guide column brackets 13 are symmetrically fixedly connected to the left and right sides of the first bottom plate 11. The left front corner and the right rear corner of the first bottom plate 11 are respectively fixedly connected to the column 14. The scale plate 55 is connected to the first bottom plate 11, and the two second fixing seats 51 are connected to the first bottom plate 11. A first groove 111 is horizontally opened in the middle of the first bottom plate 11, and a second groove 123 is vertically opened in the middle of the pad 12. The first stopper 121 is installed on the left side wall of the pad 12. There is a first protrusion 1211, which is used to limit the left and right position of the receiving probe body 7. The stop plate 122 is installed on the upper left side of the first stop 121. The stop plate 122 is used to fix the workpiece body 8. A closed oblong hole 1221 is opened on the stop plate 122. The upper and lower positions of the stop plate 122 can be adjusted by the design of the closed oblong hole 1221 to fix the workpiece body 8 of different thicknesses. Four guide column brackets 13 are symmetrically fixedly connected on the left and right sides of the first base plate 11, and the two guide column brackets 13 on the same side are respectively located on the front and rear sides of the first groove 111. Threaded holes matching the column 14 are opened at the left front corner and the right rear corner of the first base plate 11. The column 14 is connected to the first base plate 11 by threads, so that the column 14 is firmly installed on the first base plate 11.

[0030] See also Figure 1 , Figure 3 , Figure 4 and Fig. 9 In this embodiment, the first clamping assembly includes a front vertical plate 21, a rear vertical plate 22, a side push plate 211, a cylindrical top 212, a first guide column 23, a bidirectional threaded rod 24 and a first fixed seat 25. The front vertical plate 21 and the rear vertical plate 22 are connected with the side push plate 211 and the cylindrical top 212. The side push plate 211 is fixed to the inner side of the middle part of the front vertical plate 21 and the rear vertical plate 22. The cylindrical top 212 is fixed to the inner side of the lower left side of the front vertical plate 21 and the rear vertical plate 22. The four corners of the front vertical plate 21 and the rear vertical plate 22 are connected to four first guide columns 23, and the first guide columns 23 are installed on the guide columns. On the bracket 13, a bidirectional threaded rod 24 is connected to the lower middle part of the front vertical plate 21 and the rear vertical plate 22 through a thread, and the two ends of the bidirectional threaded rod 24 are connected to the first fixing seat 25, and the first fixing seat 25 is connected to the first bottom plate 11. The front vertical plate 21 and the rear vertical plate 22 are the same in all aspects, except for one difference, that is, the threaded hole that cooperates with the bidirectional threaded rod 24. Three pairs of holes of different heights that cooperate with the side push plate 211 are provided on the front vertical plate 21 and the rear vertical plate 22. The hole of the side push plate 211 with a suitable height can be selected according to the thickness of the workpiece body 8 to be detected. The lower left corners of the vertical plate 21 and the rear vertical plate 22 are provided with a plurality of threaded holes that match the cylindrical top 212. The cylindrical top 212 is connected to the front vertical plate 21 and the rear vertical plate 22 by threads, so that the cylindrical top 212 is firmly installed on the front vertical plate 21 and the rear vertical plate 22. The threaded hole for inserting the cylindrical top 212 can be adjusted according to the position of the receiving probe body 7. The side push plate 211 is consistent with the length of the cylindrical top 212. The side push plate 211 is used to clamp the transmitting probe body 6, and the cylindrical top 212 is used to clamp the receiving probe body 7. The four corners of the front vertical plate 21 and the rear vertical plate 22 are provided with threads that match the first A through hole that cooperates with the guide column 23 is opened on each guide column bracket 13, and a through hole that cooperates with the first guide column 23 is opened. Two first guide columns 23 are inserted in the middle of the two guide column brackets 13 on each side of the left and right sides of the first base plate 11. The front and rear sides of the four first guide columns 23 can be respectively inserted into the front vertical plate 21 and the rear vertical plate 22. The front vertical plate 21 and the rear vertical plate 22 are connected to the two-way threaded rod 24 through threads. The threads at both ends of the two-way threaded rod 24 are left-handed and right-handed threads respectively. The first fixing seats 25 are connected to both ends of the two-way threaded rod 24 at the same time, and the two first fixing seats 25 are a pair of mirrored parts.

[0031] See also Figure 1 , Figure 5 and Fig. 9In this embodiment, the upper fixing component includes a first threaded rod 31, an upper cover plate 32, an upper push plate 33 and a first rolling bearing 34. The first threaded rod 31 is connected to the upper cover plate 32 by a threaded through connection. The end of the first threaded rod 31 is connected to the first rolling bearing 34 and the upper push plate 33. The two ends of the upper cover plate 32 are connected to the column 14. A threaded hole is opened at the end of the first threaded rod 31, and a through hole is opened in the middle of the upper push plate 33. The first rolling bearing 34 is fixed inside the through hole of the upper push plate 33 by bolts and is connected to the threaded hole at the end of the first threaded rod 31, thereby ensuring that the upper push plate 33 does not rotate with the rotation of the first threaded rod 31. When the first threaded rod 31 is spirally moved downward, the upper push plate 33 at the end of the first threaded rod 31 can provide a constant pressure in the vertical direction to the transmitting probe body 6 and the workpiece body 8 below, thereby reducing the influence of excessive or low contact pressure on the amplitude of the transmission signal.

[0032] See also Figure 2 , Figure 6 and Figure 7 In this embodiment, the auxiliary clamping assembly includes a side support 41, a second threaded rod 42, a base push rod head 43 and a base clamping plate 44. The side support 41 is connected to the pad 12, the second threaded rod 42 is connected to the side support 41 through a thread, the end of the second threaded rod 42 is connected to the base push rod head 43 through a thread, the base push rod head 43 is in contact with the base clamping plate 44, the base clamping plate 44 is placed on the pad 12, the bottom of the side support 41 is fixed on the pad 12, the second threaded rod 42 It is connected to the top of the side support 41 through a threaded through-hole, and a second protrusion 441 is left under the base clamp 44. The second protrusion 441 on the base clamp 44 is placed in the second groove 123 on the pad 12. The second groove 123 mainly provides a guiding function for the second protrusion 441 on the base clamp 44. The base clamp 44 is pushed by rotating and moving the second threaded rod 42 to ensure that the base clamps 44 at both ends of the pad 12 can fix the receiving probe body 7 when moving inward.

[0033] like Fig. 9 As shown, during the detection, the receiving probe body 7 of the present invention is placed on the pad 12 and is close to the first protrusion 1211 on the first stopper 121, the workpiece body 8 is placed on the receiving probe body 7 and is close to the stopper plate 122, the transmitting probe body 6 is placed on the workpiece body 8 and is located at the right end limit position in the first clamping assembly and is close to the front end plate 54, and then the moving assembly is zeroed, the transmitting probe body 6 is pushed to move by moving the third threaded rod 53, and the scale position of the first pointer 57 on the scale plate 55 is recorded. As the moving distance increases, the relative position of the transmitting probe chip and the receiving probe chip changes, and the amplitude of the ultrasonic transmission signal shows a trend of first rising and then falling (specifically as shown in FIG. 1 ). Fig.10As shown in the figure, the amplitude of the transmission signal at an incident angle of 0° is higher than that at an incident angle of 45°. The difference in the amplitude curves at 0° and 45° incidence is essentially the result of differences in propagation modes and energy distribution. At 0° incidence, there is a single longitudinal wave path, concentrated energy, and a clear attenuation law. At 45° incidence, multi-waveform conversion, path extension, interference effect, and beam diffusion work together to cause significant amplitude fluctuations and a lower overall amplitude. In addition, experimental data show that at different emission angles, there are significant differences in the moving distance of the transmitting probe body 6 when the transmission signal amplitude reaches a peak value. Therefore, when performing ultrasonic transmission detection and ultrasound is incident at an inclined angle, the present invention is required to move the transmitting probe body 6 and the receiving probe body 7 to the position with the maximum transmission amplitude to ensure that the experimental results are only affected by factors such as the material properties and thickness of the workpiece body 8 to be detected.

Claims

1. A movable contact type ultrasonic transmission detection device, comprising a bottom plate assembly, characterized in that: The invention also comprises a first clamping assembly, an upper fixing assembly, an auxiliary clamping assembly and a moving assembly, wherein the first clamping assembly is installed above the base plate assembly, the upper fixing assembly is arranged above the first clamping assembly, the auxiliary clamping assembly is symmetrically installed at the front and rear sides of the base plate assembly and is located outside the first clamping assembly, the moving assembly is arranged at the right end center position of the base plate assembly, a receiving probe body (7) is arranged above the base plate assembly, a workpiece body (8) is arranged above the receiving probe body (7), the moving assembly comprises a second fixing seat (51), a fixing frame (52), a third threaded rod (53), a front end plate (54), a scale plate (55), a pointer clamp (56), a first pointer (57) and a second rolling bearing (58), the second rolling bearing (58) is nested on the third threaded rod (53), and the second A pointer clamp (56) is fixed to the outer ring of the rolling bearing (58), a first pointer (57) is fixed below the pointer clamp (56), a scale plate (55) is arranged below the first pointer (57), a third threaded rod (53) is connected to the two fixing frames (52) by threaded penetration, one end of the third threaded rod (53) is connected to the front end plate (54), an end of the front end plate (54) away from the third threaded rod (53) is arranged with a transmitting probe body (6), the transmitting probe body (6) is arranged on the top of the workpiece body (8), two second fixing seats (51) are connected to the inner sides of the two fixing frames (52), a semi-open oblong hole (521) is opened inside the fixing frame (52), a transmitting probe crystal is arranged inside the transmitting probe body (6), and a receiving probe crystal is arranged inside the receiving probe body (7).

2. The movable contact type ultrasonic transmission detection device according to claim 1, characterized in that: The base plate assembly comprises a first base plate (11), a pad (12), a first stopper (121), a stopper connecting plate (122), a guide column bracket (13) and a column (14); the pad (12) is installed in the middle of the first base plate (11); the left side of the pad (12) is fixedly connected with the first stopper (121); the right side of the first stopper (121) is provided with a first protrusion (1211); the top of the first stopper (121) is fixedly connected with the stopper connecting plate (122); the left and right sides of the first base plate (11) are symmetrically fixedly connected with four guide column brackets (13); the left front corner and the right rear corner of the first base plate (11) are respectively fixedly connected with the column (14); the scale plate (55) is connected with the first base plate (11); and the two second fixing seats (51) are connected with the first base plate (11).

3. The movable contact type ultrasonic transmission detection device according to claim 2, characterized in that: The first bottom plate (11) is provided with a first groove (111) extending from left to right, the first stopper (121) is provided with a through hole through which a bolt can pass, and the stopper connecting plate (122) is provided with a closed oblong hole (1221) at a position corresponding to the through hole, and the backing plate (12) is provided with a second groove (123) extending from front to back.

4. The movable contact type ultrasonic transmission detection device according to claim 2, characterized in that: The first clamping assembly comprises a front vertical plate (21), a rear vertical plate (22), a side push plate (211), a cylindrical top (212), a first guide column (23), a bidirectional threaded rod (24) and a first fixed seat (25); the front vertical plate (21) and the rear vertical plate (22) are both connected with the side push plate (211) and the cylindrical top (212); the side push plate (211) is fixed to the inner side of the middle part of the front vertical plate (21) and the rear vertical plate (22); the cylindrical top (212) is fixed to the front vertical plate (21) and the rear vertical plate (22); The front and rear vertical plates (21 and 22) are connected to four first guide posts (23) at their four corners, the first guide posts (23) are mounted on the guide post bracket (13), and the middle and lower parts of the front and rear vertical plates (21 and 22) are connected to a bidirectional threaded rod (24) through a thread, and the two ends of the bidirectional threaded rod (24) are connected to a first fixing seat (25), and the first fixing seat (25) is connected to the first bottom plate (11).

5. The movable contact type ultrasonic transmission detection device according to claim 4, characterized in that: The upper fixing assembly comprises a first threaded rod (31), an upper cover plate (32), an upper push plate (33) and a first rolling bearing (34); the first threaded rod (31) and the upper cover plate (32) are connected through threads; the end of the first threaded rod (31) is connected to the first rolling bearing (34) and the upper push plate (33); and both ends of the upper cover plate (32) are connected to the column (14).

6. The movable contact type ultrasonic transmission detection device according to claim 5, characterized in that: The auxiliary clamping assembly comprises a side support (41), a second threaded rod (42), a base push rod head (43) and a base clamping plate (44); the side support (41) is connected to the pad (12); the second threaded rod (42) and the side support (41) are connected through threads; the end of the second threaded rod (42) is connected to the base push rod head (43) through threads; the base push rod head (43) and the base clamping plate (44) are in contact; and the base clamping plate (44) is placed on the pad (12).

7. The movable contact type ultrasonic transmission detection device according to claim 6, characterized in that: A second protrusion (441) adapted to the second groove (123) is left at the bottom of the base clamping plate (44), and the second protrusion (441) slides inside the second groove (123).

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