Special measuring tool for concentricity of conduit

Abstract

The utility model relates to the technical field of conduit detection, in particular to a special gauge tool for conduit concentricity, which comprises a conduit, a support base and a support. The detection assembly comprises an inner diameter go-no go gauge matched with the diameter of an inner hole of a conduit to be detected, a fixing screw rod and a dial indicator, the fixing screw rod is located above the inner diameter go-no go gauge in parallel, the conduit to be detected is sleeved on the outer circumferential wall of the inner diameter go-no go gauge, and the inner diameter of the conduit is matched with the outer diameter of the inner diameter go-no go gauge; a bottom measuring gauge head of the dial indicator abuts against the outer circumferential wall of the conduit; the special measuring tool can reduce the intervention of human factors on the measurement result, thereby improving the detection precision, improving the detection efficiency and accuracy, guaranteeing the normal operation of the engine, and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of catheter detection, in particular to a special measuring tool for catheter concentricity. Background Art

[0002] The valve guide is an important component in a car engine. It is mainly responsible for guiding the movement of the valve and ensuring that the valve is opened and closed at the correct time and in the correct position.

[0003] Valve guides require coaxiality testing. This test determines the degree of concentricity between the inner and outer diameters of the valve guide, specifically whether they are aligned on the same centerline. Coaxiality is crucial to engine performance and efficiency. Failure to meet coaxiality requirements can cause the valve guide to deviate during operation, impacting engine operation and even leading to engine failure.

[0004] Currently, the coaxiality of the valve guide is tested using a V-shaped plate and a dial indicator, which is slow, inefficient, and has a significant impact on the measurement results due to human factors. Utility Model Content

[0005] The purpose of the utility model is to provide a special measuring tool for concentricity of a catheter to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A tool for measuring and checking the concentricity of a catheter, comprising a catheter, a support base, and a bracket. The bracket is provided with a detection assembly for detecting the concentricity of the catheter. The detection assembly includes an inner diameter go / no-go gauge that matches the inner diameter of the catheter to be tested, a fixing screw, and a dial indicator. The fixing screw is located parallel to and above the inner diameter go / no-go gauge. The catheter to be tested is sleeved on the outer circumferential wall of the inner diameter go / no-go gauge, and the inner diameter of the catheter matches the outer diameter of the inner diameter go / no-go gauge.

[0008] The measuring head at the bottom of the dial indicator abuts against the outer circumferential wall of the conduit.

[0009] As a preferred solution of the present invention, fixing through holes are uniformly opened on the bracket, and the fixing screw and one end of the inner diameter go / no-go gauge are connected to the fixing through holes on the bracket by bolts.

[0010] As a preferred solution of the present invention, a mounting through hole is vertically opened on the fixing screw, the dial indicator is located on the fixing screw, the measuring head at the bottom of the dial indicator passes through the mounting through hole and extends to its bottom and abuts against the outer wall of the conduit with a measuring gauge on the outer circumferential wall of the inner diameter go / no-go gauge, and the dial indicator is mounted and pressed against the fixing screw by bolts.

[0011] As a preferred solution of the present invention, when the measuring head at the bottom of the dial indicator contacts the outer wall of the conduit, there is a certain pressure gauge value, and the pressure gauge value is ±0.2 mm.

[0012] As a preferred solution of the present invention, during measurement, the catheter rotates on the outer circumferential wall of the inner diameter go / no-go gauge on which it is sleeved.

[0013] As a preferred solution of the present invention, during measurement, it is necessary to measure three different positions of the catheter once each, and the maximum difference is taken as the coaxiality error of the catheter.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] In response to the problems raised in the background technology, the tooling of this application is cleverly designed, easy to operate and has good use effects, achieving the purpose of saving inspection time and thus reducing costs;

[0016] A special measuring and checking tool for the concentricity of the catheter includes a catheter, a supporting base and a bracket. A detection component for detecting the concentricity of the catheter is provided on the bracket. The component includes an internal diameter go / no-go gauge, a fixing screw and a dial indicator that match the inner hole diameter of the catheter to be detected. When performing coaxiality detection, the operation is simple and convenient. It is only necessary to place the catheter to be detected on the outer circumferential wall of the internal diameter go / no-go gauge, and read the data by abutting the measuring head at the bottom of the dial indicator against the outer circumferential wall of the catheter. Compared with traditional methods, this special measuring and checking tool can reduce the interference of human factors on the measurement results, thereby improving the detection precision, efficiency and accuracy, thereby ensuring the normal operation of the engine and extending its service life.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model;

[0019] Figure 2 This is the main view of the utility model;

[0020] Figure 3 This is the axonometric drawing of the upper structure of the bracket of the utility model;

[0021] Figure 4 It is a side structural diagram of the utility model.

[0022] In the figure: 1. Conduit; 2. Support base; 3. Inside diameter go / no-go gauge; 31. Fixing screw; 311. Mounting through hole; 32. Dial indicator; 4. Bracket; 41. Fixing through hole. DETAILED DESCRIPTION

[0023] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive. Example

[0024] See also Figure 1-4 The utility model provides a technical solution: a special measuring and checking tool for the concentricity of a catheter, comprising a catheter 1, a supporting base 2 and a bracket 4. A detection component for detecting the concentricity of the catheter 1 is provided on the bracket 4. The detection component includes an inner diameter go / no-go gauge 3, a fixing screw 31 and a dial indicator 32 that match the inner hole diameter of the catheter 1 to be detected. It is the core part for realizing concentricity detection. The fixing screw 31 is located parallel to the inner diameter go / no-go gauge 3. The M16 threaded end at the bottom of the bracket 4 is threadedly connected to the M16 center hole of the supporting base 2, which is easy to install and disassemble. It serves as the basis of the entire measuring and checking tool and provides stable support and positioning functions. The bracket 4 connects the supporting base 2 and the detection component to ensure the stability and accuracy of the detection component. To be measured, the catheter 1 is sleeved on the outer circumferential wall of the inner diameter go / no-go gauge 3, and the inner diameter of the catheter 1 matches the outer diameter of the inner diameter go / no-go gauge 3; fixed through holes are evenly opened on the bracket 4. The cam 31 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole 311 which is perpendicular to the axis of the guide rail 31 and the guide rail 32 is provided with a through hole

[0025] It should be noted that, in this embodiment, the inner diameter go / no-go gauge 3 matches the inner diameter of the conduit 1 to be tested, and is used to simulate the outer diameter of the valve stem as a reference for testing. The fixing screw 31 is located parallel to and above the inner diameter go / no-go gauge 3, and is connected to the fixing through-hole 41 on the bracket 4 by bolts to ensure the stability of the inner diameter go / no-go gauge. The dial indicator 32 is located on the fixing screw 31, and the bottom measuring head extends through the mounting through-hole 311 to the bottom and abuts against the outer wall of the conduit 1 on the outer circumferential wall of the inner diameter go / no-go gauge 3. The dial indicator 32 is installed and pressed against the fixing screw 31 by bolts to ensure the accuracy of the measurement.

[0026] Furthermore, the catheter 1 to be tested is placed on the outer circumferential wall of the inner diameter go / no-go gauge 3, and the inner diameter of the catheter 1 is ensured to match the outer diameter of the inner diameter go / no-go gauge. The position and angle of the dial indicator 32 are adjusted so that its bottom measuring head contacts the outer circumferential wall of the catheter 1 and has a certain pressure gauge reading (±0.2mm). The reading is read by slowly rotating the catheter 1 and observing the changes in the reading of the dial indicator 32. Measurements are taken at different positions (usually three different positions) of the catheter 1, and each reading is recorded.

[0027] To determine the result, rotate the guide tube 1 one circle and observe the changes in the dial indicator. The difference between the maximum and minimum values ​​is the coaxiality error of the guide tube at that point. Measure three different positions of the same guide tube once each. The maximum difference among the three positions is the coaxiality error of the guide tube. If the error is within the allowable range (depending on the specific engine design requirements), the concentricity of the guide tube 1 meets the requirements. Otherwise, it does not meet the requirements.

[0028] Compared with the traditional V-plate plus dial indicator detection method, this special measuring tool is simpler and faster to operate, and can significantly improve detection efficiency. Due to the use of standardized detection components and precise measuring tools (such as a dial indicator), it can reduce the interference of human factors in the measurement results and improve the accuracy of measurement. This special measuring tool for valve guide concentricity is not only suitable for the automotive engine field, but can also be used in other mechanical equipment that requires high-precision concentricity detection.

[0029] The working process of this utility model:

[0030] During use, the catheter 1 to be tested is placed on the outer circumferential wall of the inner diameter go / no-go gauge 3, and ensure that the inner diameter of the catheter 1 matches the outer diameter of the inner diameter go / no-go gauge. The position and angle of the dial indicator 32 are adjusted so that its bottom measuring head contacts the outer circumferential wall of the catheter 1 and has a certain pressure gauge reading (±0.2mm). To read the data, slowly rotate the catheter 1 and observe the changes in the reading of the dial indicator 32. Measure once at different positions of the catheter 1 (usually three different positions) and record each reading. Rotate the catheter 1 one circle and observe the changes in the dial indicator. The difference between the maximum and minimum values ​​is the coaxiality error of the catheter at this point. The same catheter needs to be measured once at three different positions. The maximum difference among the three positions is the coaxiality error of the catheter. If the error is within the allowable range (depending on the specific engine design requirements), it means that the concentricity of the catheter 1 meets the requirements. Otherwise, it does not meet the requirements.

[0031] The above description of the present invention is illustrative in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A special measuring tool for measuring the concentricity of a catheter, comprising a catheter (1), a support base (2) and a bracket (4), characterized in that: The bracket (4) is provided with a detection component for detecting the concentricity of the catheter (1), the detection component comprising an inner diameter go / no-go gauge (3) matching the inner diameter of the catheter (1) to be detected, a fixing screw (31) and a dial indicator (32), the fixing screw (31) being located parallel to and above the inner diameter go / no-go gauge (3), the catheter (1) to be detected is sleeved on the outer circumferential wall of the inner diameter go / no-go gauge (3), and the inner diameter of the catheter (1) matches the outer diameter of the inner diameter go / no-go gauge (3); The measuring head at the bottom of the dial indicator (32) abuts against the outer circumferential wall of the conduit (1).

2. The concentricity measuring tool for catheters according to claim 1, characterized in that: The bracket (4) is evenly provided with fixing through holes (41), and the fixing screw (31) and one end of the inner diameter go / no-go gauge (3) are connected to the fixing through holes (41) on the bracket (4) via bolts.

3. The catheter concentricity measuring tool according to claim 1, characterized in that: A mounting through hole (311) is vertically opened on the fixing screw (31), and the dial indicator (32) is located on the fixing screw (31). The measuring head at the bottom of the dial indicator (32) passes through the mounting through hole (311) and extends to the bottom thereof to abut against the outer wall of the guide tube (1) with a measuring gauge on the outer circumferential wall of the inner diameter go / no-go gauge (3). The dial indicator (32) is mounted and pressed against the fixing screw (31) by a bolt.

4. The catheter concentricity measuring tool according to claim 1, characterized in that: When the measuring head at the bottom of the dial gauge (32) contacts the outer wall of the conduit (1), a certain pressure gauge value is generated, and the pressure gauge value is ±0.2 mm.

5. The catheter concentricity measuring tool according to claim 1, characterized in that: During measurement, the catheter (1) rotates on the outer circumferential wall of the inner diameter go / no-go gauge (3) on which it is sleeved.

6. The catheter concentricity measuring tool according to claim 1, characterized in that: During the measurement, it is necessary to measure the catheter (1) once at three different positions, and take the maximum difference as the coaxiality error of the catheter.

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