Auxiliary handheld ultrasonic flaw detection device

Abstract

The utility model relates to an auxiliary handheld ultrasonic flaw detection device which comprises a hollow connecting rod, the lower end of the connecting rod is connected with a mounting seat, a sponge block is embedded in the bottom surface of the front end of the mounting seat, a probe is mounted on the bottom surface of the rear end of the mounting seat, and a material storage cavity for storing a coupling agent and a pressure feeding mechanism for pressing the coupling agent into the sponge block are arranged in a cavity of the connecting rod. The pressure feeding mechanism comprises a compression part for compressing the coupling agent and an unloading part for releasing the coupling agent to flow into the sponge block; and the compression part is provided with a sealing piston which is in sliding fit with the inner wall of the cavity of the extension rod to increase the pressure in the material storage cavity. According to the utility model, the probe is arranged at the lower end of the connecting rod, so that the working mode of long-time squatting or stooping is changed, and the labor intensity of detection personnel is reduced; and in the forward pushing process, the sponge block wetted by the coupling agent preferentially sweeps foreign matters and impurities on the surface of the sample and wets the surface of the sample, so that a good working environment can be provided for the probe, the abrasion of the probe is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flaw detection, in particular to an auxiliary handheld ultrasonic flaw detection device. Background Art

[0002] Ultrasonic testing is one of the five conventional nondestructive testing methods. Handheld ultrasonic testing, as its foundation, is widely used across various industries. While technological advancements have led to the emergence of fully automatic and semi-automatic ultrasonic testing equipment, handheld ultrasonic testing, as a fundamental ultrasonic testing method, remains irreplaceable due to various limitations and technological immaturity.

[0003] Handheld ultrasonic flaw detection equipment is lightweight and offers a flexible operating environment. It's commonly used for testing steel bars on-site. However, these bars are often placed on the ground due to their heavy weight, requiring technicians to squat or bend for extended periods, which is very demanding. Furthermore, the ground is often filled with foreign matter and impurities, which can adhere to the sample surface, causing wear on the probe and affecting inspection results. Summary of the Invention

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides an auxiliary handheld ultrasonic flaw detection device which can improve detection efficiency and reduce probe wear.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an auxiliary handheld ultrasonic flaw detection device, including a hollow connecting rod, a mounting seat connected to the lower end of the connecting rod, a sponge block embedded in the bottom surface of the front end of the mounting seat, and a probe installed on the bottom surface of the rear end of the mounting seat. A storage chamber for storing coupling agent and a pressure-feeding mechanism for pressing the coupling agent into the sponge block are provided in the cavity of the connecting rod. The pressure-feeding mechanism includes a compression part provided at the upper part of the storage chamber for compressing the coupling agent, and a discharge part provided at the lower part of the storage chamber for releasing the coupling agent into the sponge block; the compression part has a sealing piston that slides with the inner wall of the connecting rod cavity, and the upper end of the connecting rod is hinged with a pressure-feeding handle that pushes the sealing piston to move up and down to increase the pressure in the storage chamber.

[0006] Specifically, the front end of the mounting seat has a threaded hole, the sponge block is embedded in the cavity below the threaded hole and protrudes from the bottom surface of the mounting seat, and the lower end of the connecting rod is threadedly connected to the threaded hole at the front end of the mounting seat.

[0007] Furthermore, a threaded deep hole is opened at the rear end of the mounting seat, the probe is arranged in the cavity below the threaded deep hole, a fixing ring is provided around the probe to radially fix the probe, a clamping bolt is connected in the threaded deep hole, and a clamping spring is provided between the clamping bolt and the upper end face of the probe.

[0008] Furthermore, a gripping handle is fixed to the upper end of the connecting rod, a non-slip rubber sleeve is sleeved on the gripping handle, and a pressing handle is located below the gripping handle and is hinged to the connecting rod.

[0009] Furthermore, an injection port for adding coupling agent is provided on the outer wall of the connecting rod where the material storage cavity is located, and a sealing cover is provided on the injection port.

[0010] Specifically, the compression part includes a sealing baffle and a main spring. The sealing baffle is fixed to the inner wall of the connecting rod cavity. The main spring is arranged between the bottom surface of the sealing piston and the upper end surface of the sealing baffle. The sealing baffle has a raised hollow cylinder in the center, and the lower end of the main spring is fixed on the hollow cylinder. The compressed gas in the compression part can enter the storage cavity through the inner hole of the hollow cylinder. The upper end surface of the sealing piston is fixed with a transmission rod, and the upper end of the transmission rod is movably connected to the pressure delivery handle.

[0011] Furthermore, a second spring is provided on the side of the sealing baffle, an air return hole is provided on the sealing piston corresponding to the position of the second spring, and a second top bead is clamped between the upper end of the second spring and the air return hole.

[0012] Furthermore, the unloading part includes a lower baffle, a first spring, a first push bead and an upper baffle. The lower baffle and the upper baffle are both fixed to the inner wall of the connecting rod. The lower baffle has a hollow convex cylinder in the center, and the lower end of the first spring is fixed to the convex cylinder. A spherical hole is opened in the center of the upper baffle, and the first push bead is clamped in the spherical hole and fixed to the upper end of the first spring. The pressurized coupling agent in the storage cavity flows through the inner hole of the convex cylinder in the center of the lower baffle into the front end cavity of the mounting seat and is absorbed by the sponge block.

[0013] The beneficial effects of the utility model are as follows: the utility model changes the working mode of squatting or bending over for a long time by installing the probe at the lower end of the connecting rod, thereby reducing the labor intensity of the detection personnel; in the process of pushing forward, the sponge block moistened by the coupling agent will preferentially sweep away foreign matter and impurities on the surface of the sample and moisten the surface of the sample, providing a good working environment for the rear end probe, reducing the wear of the probe, and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure inside the connecting rod of the utility model.

[0017] Figure 3 It is an enlarged structural schematic diagram of the discharge part of the utility model.

[0018] Figure 4 It is an enlarged structural schematic diagram of the compression part of the utility model.

[0019] Figure 5 It is an enlarged structural schematic diagram of the mounting base of the utility model.

[0020] Figure 6 It is a schematic diagram of the installation structure of the probe of the utility model.

[0021] Figure 7 It is a schematic diagram of the installation structure of the fixing ring of the utility model.

[0022] In the figure: 1. Holding handle; 2. Pressing handle; 3. Connecting rod; 4. Sealing cover; 5. Mounting seat; 6. Sponge block; 7. Long rod screw; 8. Limiting groove; 9. Holding bolt; 10. Lower baffle; 11. First spring; 12. First top bead; 13. Upper baffle; 14. Injection port; 15. Sealing baffle; 16. Second spring; 17. Second top bead; 18. Sealing piston; 19. Transmission rod; 20. Main spring; 21. Threaded hole; 22. Threaded deep hole; 23. Holding spring; 24. Fixing ring; 25. Probe. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0024] like Figure 1 The illustrated auxiliary handheld ultrasonic flaw detection device comprises a gripping handle 1, a connecting rod 3, a mounting base 5, a sponge block 6, and a probe 25. A non-slip rubber sleeve is provided over the gripping handle 1 to prevent the device from slipping out of the hand during pushing. The gripping handle 1 is fixed to the upper end of the connecting rod 3. A pressure-feeding handle 2 is hinged to the upper end of the connecting rod 3 below the gripping handle 1.

[0025] like Figure 5 As shown, the bottom surface of the mounting base 5 has a certain curvature to accommodate round rod specimens. A threaded hole 21 is provided at the front end of the mounting base 5. A sponge block 6 is embedded in the cavity below the threaded hole 21 and protrudes from the bottom surface of the mounting base 5. The sponge block 6 is replaceable and is larger than the cavity to ensure a full and secure state. The lower end of the connecting rod 3 is threadedly connected to the threaded hole 21 at the front end of the mounting base 5.

[0026] like Figure 5 、 Figure 6 、 Figure 7As shown, a threaded deep hole 22 is provided at the rear end of the mounting seat 5, and the probe 25 is arranged in the cavity below the threaded deep hole 22. A limiting groove 8 is provided on the side of the mounting seat 5 corresponding to the cavity below the threaded deep hole 22. A long rod screw 7 is passed through the limiting groove 8, and a fixing ring 24 is provided circumferentially around the probe 25. A circular hole and a screw hole are respectively provided at both ends of the fixing ring 24. The long rod screw 7 passes through the circular hole and is threadedly connected to the screw hole. By adjusting the tightness of the fixing ring 24, the probe 25 is fixed; a clamping bolt 9 is connected to the threaded deep hole 22, and a clamping spring 23 is provided between the clamping bolt 9 and the upper end surface of the probe 25. The degree of relaxation of the clamping spring 23 can be adjusted by rotating the clamping bolt 9, giving the probe 25 a certain pressure, so that the probe 25 maintains good contact with the sample surface, and improves the detection effect; a through hole is provided in the center of the clamping bolt 9 for passing the wire connecting the probe 25.

[0027] like Figure 2 As shown, the connecting rod 3 is a hollow rod, and the middle position of the cavity of the connecting rod 3 is a storage cavity for storing coupling agent. An injection port 14 for adding coupling agent is opened on the outer wall of the connecting rod 3 where the storage cavity is located, and a sealing cover 4 is provided on the injection port 14 for sealing.

[0028] A pressure-feeding mechanism is provided in the cavities of the connecting rod 3 located at the upper and lower ends of the storage chamber to press the coupling agent into the sponge block 6. The pressure-feeding mechanism includes a compression part located at the upper part of the storage chamber to press the coupling agent, and a discharge part located at the lower part of the storage chamber to release the coupling agent into the sponge block 6.

[0029] like Figure 2 、 Figure 4 As shown, the compression part includes a sealing piston 18, a sealing baffle 15, a main spring 20, a second spring 16 and a second top ball 17. The sealing piston 18 slides with the inner wall of the cavity of the connecting rod 3, the sealing baffle 15 is fixed to the inner wall of the cavity of the connecting rod 3, and the main spring 20 is arranged between the sealing piston 18 and the sealing baffle 15; a transmission rod 19 is fixedly connected to the upper end surface of the sealing piston 18, and the upper end of the transmission rod 19 is movably connected to the pressure feeding handle 2. Pulling the pressure feeding handle 2 drives the sealing piston 18 to move back and forth up and down, and in this process, the required pressure can be generated in the compression part.

[0030] The sealing baffle 15 has a raised hollow cylinder in the center, and the lower end of the main spring 20 is fixed on the hollow cylinder. The compressed gas in the compression part can enter the storage cavity through the inner hole of the hollow cylinder, pushing the coupling agent downward to the discharge part.

[0031] A raised cylinder is provided on the side of the sealing baffle 15 for fixing the second spring 16. A return air hole is provided on the sealing piston 18 corresponding to the position of the second spring 16. The second top ball 17 is clamped between the upper end of the second spring 16 and the return air hole. The second spring 16 and the second top ball 17 constitute a spring sealing structure.

[0032] like Figure 2 、 Figure 3 As shown, the discharge section comprises a lower baffle 10, a first spring 11, a first push bead 12, and an upper baffle 13. Both lower baffle 10 and upper baffle 13 are fixed to the inner wall of connecting rod 3. The lower baffle 10 has a hollow convex cylinder at its center. The lower end of the first spring 11 is inserted into this convex cylinder and its bottom is fixed to the lower baffle 10. The upper baffle 13 has a spherical hole at its center. The first push bead 12 is retained within this spherical hole and is fixed to the upper end of the first spring 11. The first spring 11 and the first push bead 12 form a spring seal. The pressurized coupling agent in the storage chamber flows through the inner hole of the convex cylinder at the center of the lower baffle 10 into the chamber below the threaded hole 21 at the front end of the mounting seat 5, where it is absorbed by the sponge block 6.

[0033] The main spring 20 is stronger than the first spring 11 and the second spring 16, which are of comparable strength. The main spring 20 provides the primary driving force for the rebound of the sealing piston 18. During the rebound process, the air return hole on the sealing piston 18 remains unobstructed because the main spring 20 is stronger than the second spring 16. Gas within the compression section can flow back into the inner cavity of the connecting rod 3 above the compression section through this air return hole.

[0034] The connecting rod 3 in the above structure adopts a segmented splicing method, and is divided into sections between the sealing baffle 15 and the sealing piston 18 of the compression part, and between the lower baffle 10 and the upper baffle 13 of the discharge part. Numbered positioning holes and positioning pins are respectively provided at the sections for corresponding plug-in during assembly.

[0035] First, install the sealing piston 18, sealing baffle 15, main spring 20, second spring 16 and second top bead 17 of the compression part, and then install the lower baffle 10, first spring 11, first top bead 12 and upper baffle 13 of the discharge part. Then, tighten them according to the corresponding positioning holes and positioning pin numbers at the segmented parts. Finally, seal and reinforce the connection by welding to complete the assembly of the connecting rod 3 and the internal compression part and discharge part.

[0036] The utility model can change the working mode of squatting or bending for a long time by installing the probe 25 at the lower end of the connecting rod 3, thereby reducing the labor intensity of the detection personnel; at the same time, when the device is pushed forward, the sponge block 6 moistened by the coupling agent will preferentially remove foreign matter and impurities on the surface of the sample and moisten the surface of the sample, providing a good working environment for the rear end probe 25, reducing the wear of the probe 25, and improving the detection efficiency.

[0037] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An auxiliary handheld ultrasonic flaw detection device, Its characteristics are: It comprises a hollow connecting rod, the lower end of which is connected to a mounting seat, a sponge block is embedded in the bottom surface of the front end of the mounting seat, a probe is installed on the bottom surface of the rear end of the mounting seat, a storage chamber for storing coupling agent and a pressure-feeding mechanism for pressing the coupling agent into the sponge block are arranged in the cavity of the connecting rod, the pressure-feeding mechanism comprises a compression part arranged at the upper part of the storage chamber for compressing the coupling agent, and a discharge part arranged at the lower part of the storage chamber for releasing the coupling agent to flow into the sponge block; the compression part has a sealing piston that slides with the inner wall of the connecting rod cavity, and a pressure-feeding handle is hinged at the upper end of the connecting rod to push the sealing piston to move up and down to increase the pressure in the storage chamber.

2. The auxiliary handheld ultrasonic flaw detection device according to claim 1, Its characteristics are: The front end of the mounting seat is provided with a threaded hole, the sponge block is embedded in the cavity below the threaded hole and protrudes from the bottom surface of the mounting seat, and the lower end of the connecting rod is threadedly connected with the threaded hole at the front end of the mounting seat.

3. The auxiliary handheld ultrasonic flaw detection device as claimed in claim 2, Its characteristics are: A threaded deep hole is provided at the rear end of the mounting seat, the probe is arranged in a cavity below the threaded deep hole, a fixing ring is provided circumferentially of the probe for radially fixing the probe, a clamping bolt is connected in the threaded deep hole, and a clamping spring is provided between the clamping bolt and the upper end surface of the probe.

4. The auxiliary handheld ultrasonic flaw detection device according to claim 1, Its characteristics are: A gripping handle is fixed on the upper end of the connecting rod, a non-slip rubber sleeve is sleeved on the gripping handle, and a pressing handle is located below the gripping handle and is hinged to the connecting rod.

5. The auxiliary handheld ultrasonic flaw detection device according to claim 1, Its characteristics are: An injection port for adding coupling agent is provided on the outer wall of the connecting rod where the material storage cavity is located, and a sealing cover is provided on the injection port.

6. The auxiliary handheld ultrasonic flaw detection device according to claim 1, Its characteristics are: The compression part includes a sealing baffle and a main spring. The sealing baffle is fixed to the inner wall of the connecting rod cavity. The main spring is arranged between the bottom surface of the sealing piston and the upper end surface of the sealing baffle. The sealing baffle has a raised hollow cylinder in the center. The lower end of the main spring is fixed on the hollow cylinder. The compressed gas in the compression part can enter the material storage cavity through the inner hole of the hollow cylinder. A transmission rod is fixedly connected to the upper end surface of the sealing piston, and the upper end of the transmission rod is movably connected to the pressure delivery handle.

7. The auxiliary handheld ultrasonic flaw detection device according to claim 6, Its characteristics are: A second spring is arranged on the side of the sealing baffle, a return air hole is arranged on the sealing piston corresponding to the position of the second spring, and a second top bead is clamped between the upper end of the second spring and the return air hole.

8. The auxiliary handheld ultrasonic flaw detection device according to claim 1, Its characteristics are: The unloading part includes a lower baffle, a first spring, a first push bead and an upper baffle. The lower baffle and the upper baffle are both fixed to the inner wall of the connecting rod. The lower baffle has a hollow convex cylinder in the center, and the lower end of the first spring is fixed on the convex cylinder. A spherical hole is opened in the center of the upper baffle. The first push bead is clamped in the spherical hole and fixed to the upper end of the first spring. The coupling agent under pressure in the storage cavity flows down through the inner hole of the convex cylinder in the center of the lower baffle to the front end cavity of the mounting seat and is absorbed by the sponge block.

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