A kind of fixture for the rapid clamping of in-situ ultrasonic detection of aviation hydraulic conduit

Abstract

The utility model belongs to nondestructive testing and evaluation technical field relates to a clamp for in situ detection of aviation hydraulic conduit ultrasonic. The clamp with ultrasonic probe can be used for in situ clamping and keeping predetermined clamping force to the hydraulic conduit with limited operation space, and the ultrasonic detection of the hydraulic conduit is facilitated. The mounting hole for mounting the ultrasonic probe is reserved on the clamp, and the positioning edge is designed, so that the repeatability of probe installation can be ensured. The torsional spring is mounted on the tool clamp, which can assist the opening and closing of the tool clamp and facilitate operation. The quick locking device is mounted on the tool clamp, which can ensure the clamping force of the hydraulic conduit fixation. The locking device adopts rigid structure, which can ensure the repeatability of the clamping force of the hydraulic conduit after long time work. When the hydraulic conduit detection is completed, the hand-pulled locking device can quickly remove the clamping force of the hydraulic conduit, and the tool clamp is removed. The whole tool clamp structure is compact and convenient to operate.

Description

Technical Field

[0001] This utility model belongs to the field of non-destructive testing and evaluation technology, and relates to a clamp for rapid clamping of aviation hydraulic ducts for ultrasonic in-situ testing, which is used in ultrasonic testing engineering applications. Background Technology

[0002] Hydraulic systems are used in a wide range of industries, from high-tech aerospace to basic speed reducers. Hydraulic conduits, as pipelines connecting various hydraulic components within these systems, transport hydraulic oil as the medium to drive these components. Therefore, hydraulic conduits bear one of the most critical responsibilities in this system. Even minor defects in the conduits can lead to pressure drops, and in severe cases, conduit rupture and leakage. If left unchecked, this can result in catastrophic consequences.

[0003] Aviation hydraulic conduits have small diameters, generally below 20mm. These conduits are densely packed within equipment, leaving only a small amount of space for maintenance personnel to inspect them. The most successful existing method for in-situ inspection of hydraulic conduits is ultrasonic testing, but its main drawbacks include: 1. During testing, if the operating space is too small, the fingers and probe may not be able to grip the hydraulic conduit. In this case, the hydraulic conduit needs to be removed before testing, which reduces testing efficiency.

[0004] 2. During testing, the two ultrasonic probes need to be arranged symmetrically along the circumference and fitted with the hydraulic conduit. The ultrasonic probes need to be manually squeezed to maintain a certain clamping force, which is quite laborious.

[0005] Therefore, it is necessary to develop a clamp that can overcome the above shortcomings. This clamp needs to meet the following conditions: 1. Except for the size of the ultrasonic probe, minimize the size of the clamping end of the fixture.

[0006] 2. The ultrasonic probe must be positioned correctly to ensure repeatability of the installation.

[0007] The clamp should be easy to operate when holding hydraulic conduits, and the clamping force should be easy and quick to apply and unapproach. It should also automatically maintain a certain clamping force after the clamp is released. Summary of the Invention

[0008] The purpose of this invention is to design a clamp for rapid clamping of hydraulic conduits for ultrasonic in-situ testing, in response to the above-mentioned existing technical conditions and needs. The purpose is to cooperate with ultrasonic testing methods to perform in-situ testing of hydraulic conduits, and to obtain more reliable test results with a simpler structure and smaller size.

[0009] To solve this technical problem, the technical solution of this utility model is as follows: A clamp for rapid clamping of hydraulic conduits for ultrasonic in-situ testing of aviation hydraulic conduits, the clamp being used to clamp hydraulic conduits 6; it consists of an upper clamping block 11, a lower clamping block 12, a torsion spring 4, a push rod assembly 2, and an ultrasonic probe 5; The push rod assembly consists of an upper push rod 21, a lower push rod 22, and a headless shaft screw 32; The upper clamping block 11 and the lower clamping block 12 are connected by a headless axial screw 32. The torsion spring 4 is mounted on the headless axial screw 32 and contacts the upper clamping block 11 and the lower clamping block 12. Two ultrasonic probes 5 are respectively fixed to the upper clamping block 11 and the lower clamping block 12 with screws 31. The screws 31 are hexagon socket head cap screws.

[0010] The upper clamping block 11 and the lower clamping block 12 are designed with positioning edges 112 for installing the ultrasonic probe 5, which can quickly install the ultrasonic probe 5 and ensure the symmetry and repeatability of the installation, so as to achieve a gapless symmetrical fit between the detection end of the ultrasonic probe 5 and the hydraulic conduit 6 after clamping the hydraulic conduit 6.

[0011] After the clamp holds the hydraulic conduit 6, it pushes the push rod assembly 2 to quickly support the upper clamping block 11 and the lower clamping block 12, thereby applying a fixed clamping force to the hydraulic conduit 6. The upper clamping block 11 and the lower clamping block 12 are designed with positioning edges of the push rod assembly 2, so that the included angle between the upper push rod 21 and the lower push rod 22 is controlled at 180°, thereby automatically maintaining the clamping force unchanged.

[0012] The magnitude of the clamping force can be achieved by changing the lengths of the upper push rod 21 and the lower push rod 22 in the push rod assembly 2.

[0013] The upper clamping block 11 and the lower clamping block 12 are respectively designed with grooves 111 to reduce the rigidity of the upper clamping block 11 and the lower clamping block 12, so that the force is not too large when pushing the push rod assembly 2, while meeting the requirements of a certain clamping force.

[0014] The installation of the torsion spring 4 ensures that the clamp always maintains a certain clamping force, which facilitates the opening operation of the upper clamping block 11 and the lower clamping block 12 when the clamping force is unloaded.

[0015] The diameter of aviation hydraulic conduits should not exceed 20mm.

[0016] The beneficial effects of this utility model are: 1. The upper and lower clamping blocks are designed with positioning edges, which facilitates the installation of the ultrasonic probe and ensures the repeatability of the installation; 2. The handheld operating end is designed with an arc-shaped groove for easy hand operation; 3. Torsion springs 4 are installed on the connecting screws of the upper clamping block 11 and the lower clamping block 12 to facilitate the opening and closing of the clamp; 4. The design of the push rod assembly 2 allows the clamp to maintain a fixed clamping force on the hydraulic conduit 6, which facilitates the signal propagation of the ultrasonic probe 5; 5. Secure the ultrasonic probe 5 with a hexagonal head screw 31, and design countersunk holes at the connection points with the upper clamping block 11 and the lower clamping block 12. All other connections are secured with headless axial screws 32, resulting in a neat and compact fixture. Attached Figure Description

[0017] To more clearly illustrate the technical solutions implemented in this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly explained below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 Schematic diagram of the fixture composition of this invention; Figure 2 A schematic diagram of the clamping mechanism of the present invention after clamping. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] The features of various aspects of the embodiments of this utility model will now be described in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of this utility model. However, it will be apparent to those skilled in the art that this utility model can also be practiced without these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples. This utility model is not limited to any specific setups and methods provided below, but covers all improvements, substitutions, etc., to product structures and methods without departing from the spirit of this utility model.

[0021] In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessary ambiguity regarding the present invention. The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments: See attached document Figure 1As shown, this clamp for rapid clamping of ultrasonic in-situ testing of aviation hydraulic conduits comprises an upper clamping block 11, a lower clamping block 12, a torsion spring 4, a push rod assembly 2, and an ultrasonic probe 5. The upper clamping block 11 and lower clamping block 12 are respectively secured to the ultrasonic probe 5 with hexagonal head screws 31 and connected by headless axial screws 31. The torsion spring 4 passes through the headless axial screw 32 and contacts the upper clamping block 11 and lower clamping block 12, providing preload force to the clamp. The push rod assembly 2 consists of an upper push rod 21, a lower push rod 22, and a headless axial screw 32. By squeezing the arc-shaped groove 113 of the upper clamping block 11 and the lower clamping block 12, the ultrasonic probe 5 at the front end of the fixture can be opened and moved to the hydraulic conduit 6. After releasing the grip, the restoring force of the torsion spring 4 allows the fixture to pre-clamp the hydraulic conduit 6. Pushing the push rod assembly 2 can open the left ends of the upper clamping block 11 and the lower clamping block 12, thereby clamping the hydraulic conduit 6 for subsequent testing. After the test is completed, pulling back the push rod assembly 2 allows the fixture to open, thus detaching the fixture from the hydraulic conduit 6 and completing the testing task.

[0022] The above-mentioned clamp has external dimensions of 41mm in length × 31mm in width × 15mm in thickness, which can be used in environments with limited operating space when performing in-situ testing of hydraulic conduits. The push rod assembly of the clamp is located at the end of the clamp, which makes it easy for the operator to push and pull the push rod assembly to achieve quick locking of the hydraulic conduit by the clamp.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A clamp for rapid clamping of hydraulic conduits for ultrasonic in-situ testing, characterized in that: The clamp is used to hold the hydraulic conduit (6); it consists of an upper clamp (11), a lower clamp (12), a torsion spring (4), a push rod assembly (2), and an ultrasonic probe (5); The push rod assembly consists of an upper push rod (21), a lower push rod (22), and a headless shaft screw (32); The upper clamping block (11) and the lower clamping block (12) are connected by a headless shaft screw (32). The torsion spring (4) is mounted on the headless shaft screw (32) and contacts the upper clamping block (11) and the lower clamping block (12). Two ultrasonic probes (5) are fixed to the upper clamping block (11) and the lower clamping block (12) respectively with screws (31).

2. The clamp according to claim 1, characterized in that: The upper clamp (11) and lower clamp (12) are designed with positioning edges (112) for installing the ultrasonic probe (5), which can quickly install the ultrasonic probe (5) and ensure the symmetry and repeatability of the installation, so as to achieve a gapless symmetrical fit between the detection end of the ultrasonic probe (5) and the hydraulic conduit (6) after clamping the hydraulic conduit (6).

3. The clamp according to claim 1, characterized in that: After the clamp holds the hydraulic conduit (6), it pushes the push rod assembly (2) to quickly support the upper clamping block (11) and the lower clamping block (12), thereby applying a fixed clamping force to the hydraulic conduit (6). The upper clamping block (11) and the lower clamping block (12) are designed with positioning edges of the push rod assembly (2), so that the included angle between the upper push rod (21) and the lower push rod (22) is controlled at 180°, thereby automatically maintaining the clamping force unchanged.

4. The clamp according to claim 3, characterized in that: The magnitude of the clamping force can be achieved by changing the lengths of the upper push rod (21) and the lower push rod (22) in the push rod assembly (2).

5. The clamp according to claim 1, characterized in that: The upper clamping block (11) and the lower clamping block (12) are respectively designed with grooves (111) to reduce the rigidity of the upper clamping block (11) and the lower clamping block (12), so that the force is not too large when pushing the push rod assembly (2), while meeting the requirements of a certain clamping force.

6. The clamp according to claim 1, characterized in that: The installation of the torsion spring (4) ensures that the clamp always maintains a certain clamping force, which facilitates the opening operation of the upper clamping block (11) and the lower clamping block (12) when the clamping force is unloaded.

7. The clamp according to claim 1, characterized in that: The screw (31) is an internal hexagonal head screw.

8. The clamp according to claim 1, characterized in that: The diameter of the aviation hydraulic conduit is no greater than 20 mm.

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