Tool for detecting surface quality of piston rod

Abstract

The invention relates to a tool for detecting the surface quality of a piston rod, the tool comprises a detection cylinder, a protection ring, a sealing ring and an air inlet nozzle, the whole detection cylinder is a cylindrical cylinder body, the air inlet nozzle is arranged on the detection cylinder, the air inlet nozzle is communicated with the inner wall of the detection cylinder, the inner wall of the detection cylinder is provided with a sealing groove for installing the sealing ring and the protection ring, and the sealing ring and the protection ring are arranged in the sealing groove. A group of sealing rings and protection rings are installed in one sealing groove, the sealing rings and the protection rings are located on the two sides of the communication position of the air inlet nozzle and the detection cylinder, and the protection rings are installed on the outer sides of the sealing rings. During use, the piston rod is slowly inserted into an inner cavity of the detection cylinder, the air inlet nozzle is connected with air inlet equipment, and the detection tool and the piston rod are integrally placed into an oil groove containing hydraulic oil; the hydraulic oil completely covers the detection part, compressed air is filled into the inner cavity of the detection cylinder, whether the hydraulic oil generates bubbles or not is observed, different parts of the piston rod can be detected by moving the piston rod or the detection tool, the operation is simple, and the detection efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of surface quality detection, and in particular to a tool for detecting the surface quality of a piston rod. Background Art

[0002] At present, when the piston rod is electroplated with chromium, a large amount of hydrogen is always released from the cathode during the chromium deposition process, forming many pores. As the chromium electroplating process proceeds, the thickness of the chromium layer continues to increase. The presence of pores will cause irregular cracking of the chromium layer until a network of microcracks is formed on the surface of the chrome-plated part.

[0003] When microcracks occur in the chromium layer, a sealing process is generally used to seal and fill the microcracks. However, due to the unstable effect of the sealing process, the sealing effect of microcracks on the surface of some piston rods is not ideal. When using a piston with a piston rod having a mesh microcrack, the hydraulic oil inside the piston will penetrate into the microcracks under the long-term effect of the internal pressure of the piston, resulting in oil leakage. The existing inspection of the outer wall of the piston stem is mostly done by manual visual observation or using a dial indicator. The visual observation has low accuracy and the dial indicator has low detection efficiency. Therefore, in order to detect whether the piston rod has microcracks in advance, it is particularly important to ensure the surface quality of the piston rod. Summary of the invention

[0004] In order to solve the problems mentioned in the above background technology, the present invention provides a tool for detecting the surface quality of a piston rod.

[0005] The present invention discloses the following technical scheme: a tool for detecting the surface quality of a piston rod, comprising a detection tube, a protective ring, a sealing ring and an air inlet nozzle, wherein the detection tube is a cylindrical body as a whole, and an air inlet nozzle is arranged on the detection tube, and the air inlet nozzle is connected with the inner wall of the detection tube, and a sealing groove is arranged on the inner wall of the detection tube for installing the sealing ring and the protective ring, and a group of sealing rings and protective rings are installed in one sealing groove, and the sealing ring and the protective ring are located on both sides of the connection between the air inlet nozzle and the detection tube, and the protective ring is installed on the outside of the sealing ring.

[0006] Furthermore, there are four groups of sealing rings and protective rings, two groups on one side, to increase the sealing effect.

[0007] Furthermore, two handles are provided on the outer wall of the detection cylinder. When the detection personnel use the tool, they can hold the handles to move the piston rod or the detection tool, which is convenient for the detection personnel to operate.

[0008] Furthermore, the air inlet nozzle is provided with an external thread for connecting to an air inlet device, making it easy to disassemble and assemble the air inlet device.

[0009] Beneficial effect: Compared with the prior art, the tooling for detecting the surface quality of the piston rod of the present invention, by providing a detection cylinder and an air inlet nozzle connected to the detection cylinder, the air inlet nozzle is used to connect to an external air pressure device, a sealing ring and a protective ring are provided in the detection cylinder, the protective ring is used to protect the sealing ring, the surface quality of the piston rod can be quickly detected, the operation is simple, and the detection efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Sectional view at AA; In the figure: 1-detection tube, 2-protection ring, 3-sealing ring, 4-air inlet nozzle, 5-handle. DETAILED DESCRIPTION

[0011] like Figure 1 to Figure 2 As shown, a tool for detecting the surface quality of a piston rod comprises a detection tube 1, a protective ring 2, a sealing ring 3 and an air inlet nozzle 4. The detection tube 1 is a cylindrical body as a whole. The detection tube 1 is provided with an air inlet nozzle 4, which is connected to the inner wall of the detection tube 1 for connecting to external air pressure. The inner wall of the detection tube 1 is provided with a sealing groove for installing the sealing ring 3 and the protective ring 2. A group of sealing rings 3 and protective rings 2 are installed in one sealing groove. The sealing rings 3 and the protective rings 2 are located on both sides of the connection between the air inlet nozzle 4 and the detection tube 1. The protective ring 2 is installed on the outer side of the sealing ring 3 to protect the sealing ring 3 and prevent the sealing ring 3 from falling out when the tool is moved; there are four groups of sealing rings 3 and protective rings 2, two groups on one side, to increase the sealing effect; the outer wall of the detection tube 1 is also provided with two handles 5. When the inspector uses the tool, he can hold the handles 5 to move the piston rod or the inspection tool, which is convenient for the inspector to operate; the air inlet nozzle 4 is provided with an external thread for connecting the air intake device, which is convenient for disassembly and assembly of the air intake device.

[0012] When in use, slowly insert the piston rod to be inspected into the inner cavity of the inspection cylinder 1, so that the outer wall of the piston rod is closely matched with the sealing rings 3 on both sides, the air inlet nozzle 4 is connected to the air inlet device, and the inspection tooling and the piston rod are placed as a whole in the oil tank filled with hydraulic oil, so that the hydraulic oil completely covers the inspection part, and compressed air is filled into the inner cavity of the inspection cylinder 1 to observe whether the hydraulic oil is bubbled. If bubbles are generated, there are cracks at the fitting place between the piston rod and the sealing ring 3; by moving the piston rod or the inspection tooling, different parts of the piston rod can be inspected. The operation is simple and fast, the inspection efficiency is high, and the micro-crack fault of the piston rod can be discovered and handled in advance.

[0013] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tool for detecting the surface quality of a piston rod, characterized in that: The invention comprises a detection tube (1), a protective ring (2), a sealing ring (3) and an air inlet nozzle (4); the detection tube (1) is a cylindrical body as a whole; the detection tube (1) is provided with an air inlet nozzle (4); the air inlet nozzle (4) is connected to the inner wall of the detection tube (1); the inner wall of the detection tube (1) is provided with a sealing groove for installing the sealing ring (3) and the protective ring (2); a group of sealing rings (3) and the protective ring (2) are installed in one sealing groove; the sealing ring (3) and the protective ring (2) are located on both sides of the connection between the air inlet nozzle (4) and the detection tube (1); and the protective ring (2) is installed on the outside of the sealing ring (3).

2. The tooling for detecting the surface quality of a piston rod according to claim 1, characterized in that: There are four groups of sealing rings (3) and protective rings (2), two groups on one side.

3. The tool for detecting the surface quality of the piston rod according to claim 1, characterized in that: The outer wall of the detection cylinder (1) is also provided with two handles (5).

4. The tool for detecting the surface quality of a piston rod according to claim 1, characterized in that: The air inlet nozzle (4) is provided with an external thread.

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