A valve body inner diameter measuring ruler

Abstract

This utility model relates to a valve body inner diameter measuring ruler. The utility model includes a fixed section with a first end and a second end opposite to each other, and a groove axially arranged along the surface of the fixed section; two telescopic sections slidably connected to the first and second ends of the fixed section, respectively, with measuring heads respectively provided at opposite ends of the two telescopic sections; wherein, a sliding cavity is axially arranged along each telescopic section and slides with the fixed section, and a damping strip is provided on the sidewall of the sliding cavity to slide in contact with the groove, the damping strip providing damping force when the telescopic section slides along the fixed section; a bubble level is installed in the middle of the fixed section. This utility model is suitable for a rapid inner diameter detection tool for large cast valve bodies, and has advantages such as free telescopic movement, built-in level calibration function, and low cost and lightweight design.

Description

Technical Field

[0001] This utility model relates to the field of casting valve body size detection technology, and in particular to a valve body inner diameter measuring ruler. Background Technology

[0002] Currently, the inner diameter of large cast valve bodies (such as large pump casings and industrial valve bodies) is one of their key structural parameters, directly affecting the assembly accuracy and sealing performance with supporting components. To ensure product quality, accurate and efficient on-site measurement of their inner diameter is necessary.

[0003] However, existing internal diameter measuring tools have many shortcomings when applied to large casting scenarios, mainly including:

[0004] Limited measuring range: Traditional inside calipers generally have a measuring range of no more than 1 meter, which is insufficient to cover the inner diameter of large valve bodies. Although measuring tapes have a larger measuring length, due to the lack of a rigid support structure, they are prone to bending and deformation when the measuring length exceeds 1.5 meters, causing reading scale deviations that may reach more than 2 millimeters.

[0005] The locking method is rigid: Although common length locking structures such as spring clips and knob screws can be used to limit the measurement length, their adjustment steps are large, making it difficult to achieve precise setting of arbitrary lengths, such as conventional non-integer sizes like 1.75 meters and 2.3 meters, resulting in poor adaptability and versatility.

[0006] Significant attitude error: Existing measuring tools generally lack horizontal calibration functions. In actual use, if the measuring device tilts (e.g., by 1°), it will lead to a large measurement error. Taking a 3-meter range as an example, the resulting vertical projection error can reach 52 millimeters, seriously affecting the accuracy of the data.

[0007] High procurement and usage costs: Although high-precision digital display inner diameter measuring equipment has strong functions, its price is usually over a thousand yuan, which significantly increases the procurement burden of small and medium-sized enterprises and is not conducive to mass configuration and promotion in the production site. Summary of the Invention

[0008] To address the problems of limited measuring range, inconvenient adjustment, inaccurate posture, and high cost of existing internal diameter measuring tools in the testing of large cast valve bodies, this utility model provides a valve body internal diameter measuring ruler, which is a rapid internal diameter testing tool suitable for large cast valve bodies. It has the advantages of free extension and retraction, built-in horizontal calibration function, low cost and lightweight design.

[0009] To solve the above technical problems, this utility model provides a valve body inner diameter measuring ruler, comprising:

[0010] The fixed section includes a first end and a second end that are disposed opposite to each other, and a groove is provided along the axial direction of the surface of the fixed section;

[0011] Two telescopic sections are slidably connected to the first and second ends of the fixed section, respectively, and measuring heads are respectively provided at the opposite ends of the two telescopic sections; wherein, a sliding cavity is provided along the axial direction of each telescopic section to slide with the fixed section, and a damping strip is provided on the side wall of the sliding cavity to slide in contact with the sliding groove, and the damping strip can provide damping force when the telescopic section slides along the fixed section;

[0012] A bubble level is installed in the middle of the fixed section.

[0013] In one embodiment of this utility model, the groove is a trapezoidal groove, and the cross-section of the damping strip is trapezoidal.

[0014] In one embodiment of this utility model, the damping strip is made of silicone rubber.

[0015] In one embodiment of this utility model, the surface of the telescopic section is provided with a mounting hole, and the damping strip is provided with a mounting protrusion embedded in the mounting hole.

[0016] In one embodiment of this utility model, the nesting gap between the telescopic section and the fixed section is ≤0.2mm.

[0017] In one embodiment of this utility model, scales are respectively provided along the length direction of the first end and the second end of the fixed segment, and the end of the telescopic segment can indicate the reading of the scales.

[0018] In one embodiment of this utility model, a sealing plate is provided at one end of each of the two telescopic sections facing away from each other, and the measuring head is conical and threadedly connected to the sealing plate.

[0019] In one embodiment of this utility model, the measuring head is made of ABS (Acrylonitrile Butadiene Styrene).

[0020] In one embodiment of this utility model, both the fixed section and the telescopic section are made of aluminum alloy, and the surfaces are provided with an anodized film with a thickness of ≥10μm.

[0021] In one embodiment of this utility model, it further includes an installation body, wherein the installation body is provided in the middle of the fixed section, and the bubble level is embedded in the surface of the installation body.

[0022] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0023] The valve body inner diameter measuring ruler described in this utility model has a double-ended symmetrical damping nested structure. The measuring tool can be freely adjusted to any length position within the required range (such as 1.5 meters to 3 meters), such as non-standard sizes like 1.75 meters and 2.3 meters. This eliminates the range limitations of traditional calipers and is suitable for rapid measurement of various types and large-diameter valve bodies.

[0024] This invention provides uniform damping force during the sliding process of the telescopic section through the built-in damping strip, which not only ensures smooth operation but also effectively suppresses inertial sliding and achieves automatic stable stopping without the need for any mechanical locking device, thus improving reliability.

[0025] The fixed section and telescopic section of this utility model are both equipped with high-contrast laser-etched scales with an accuracy of ±0.5mm; a high-sensitivity bubble level (accuracy ±0.5°) is installed in the middle, which can adjust the horizontal posture in real time during use, significantly reducing tilt error. The overall measurement error does not exceed ±1mm in a 3-meter range, meeting the accuracy requirements of the casting site.

[0026] This utility model uses aluminum alloy (6061-T6), with silicone rubber for the damping strip. The weight of a single unit is controlled to ≤1.0kg, and the measuring head is made of ABS plastic to avoid scratching the valve body surface. The entire unit can be held by a single person, slides freely, and is quickly positioned. Combined with an intuitive level indicator, it significantly improves measurement efficiency and ease of operation. Attached Figure Description

[0027] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0028] Figure 1 This is a schematic diagram of the valve body inner diameter measuring ruler of this utility model (extended state).

[0029] Figure 2 This is a schematic diagram of the valve body inner diameter measuring ruler of this utility model (retracted state).

[0030] Figure 3 This is a structural schematic diagram of the fixed section of this utility model.

[0031] Figure 4 This is a structural cross-sectional view (longitudinal section) of the fixed section of this utility model.

[0032] Figure 5 This is a cross-sectional view (transverse section) of the fixed section of this utility model.

[0033] Figure 6 This is a schematic diagram of the telescopic section of this utility model.

[0034] Figure 7This is a schematic cross-sectional view (longitudinal section) of the telescopic section of this utility model.

[0035] Figure 8 This is a cross-sectional view (transverse section) of the telescopic section of this utility model.

[0036] Explanation of reference numerals on the accompanying drawings:

[0037] 1. Fixed section; 11. Slide groove;

[0038] 2. Telescopic section; 21. Measuring head; 22. Sliding cavity; 23. Mounting hole;

[0039] 3. Damping strip; 31. Mounting protrusion;

[0040] 4. Bubble level; 41. Main installation unit. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0042] In this utility model, when directions (up, down, left, right, front, and back) are described, it is only for the convenience of describing the technical solution of this utility model, and does not indicate or imply that the technical features referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0043] In this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc. are understood to exclude the stated number; "above," "below," "within," etc. are understood to include the stated number. In the description of this utility model, if "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0044] In this utility model, unless otherwise explicitly defined, terms such as "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; a fixed connection, a detachable connection, or an integrally formed connection; a mechanical connection, an electrical connection, or a connection capable of mutual communication; or the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model based on the specific content of the technical solution.

[0045] Reference Figure 1As shown, this utility model provides a valve body inner diameter measuring ruler, comprising:

[0046] The fixed section 1 includes a first end and a second end that are disposed opposite to each other, and a groove 11 is provided along the axial direction of the surface of the fixed section 1.

[0047] Two telescopic sections 2 are slidably connected to the first and second ends of the fixed section 1, respectively. Measuring heads 21 are respectively provided at the opposite ends of the two telescopic sections 2. A sliding cavity 22 is provided along the axial direction of each telescopic section 2 to slide with the fixed section 1. A damping strip 3 is provided on the side wall of the sliding cavity 22 to slide in contact with the sliding groove 11. The damping strip 3 can provide damping force when the telescopic section 2 slides along the fixed section 1, so as to realize the free extension and contraction of the telescopic section 2 and its stable stop.

[0048] A bubble level 4 is installed in the middle of the fixed section 1.

[0049] In one embodiment, refer to Figure 5 , Figure 8 As shown, the slide groove 11 is a trapezoidal groove, and the damping strip 3 has a trapezoidal cross-section. The damping strip 3 is made of silicone rubber with a thickness of 1-2 mm, and can provide a damping force of 20N-30N. In addition, the silicone rubber is selected with a Shore hardness of 60-70°, which has wear-resistant and self-lubricating properties.

[0050] In one embodiment, refer to Figure 6 , Figure 7 As shown, the surface of the telescopic section 2 is provided with mounting holes 23, and the damping strip 3 is provided with mounting protrusions 31 embedded in the mounting holes 23.

[0051] In one embodiment, the nesting gap between the telescopic segment 2 and the fixed segment 1 is ≤0.2mm.

[0052] Specifically, graduations are provided along the length of the first and second ends of the fixed section 1, and the end of the telescopic section 2 can indicate the reading of the graduations. In one embodiment, the overall length of the valve body inner diameter measuring scale when it is in a fully retracted state (limited by the sliding cavity 22) is 1500 mm. Figure 2 L2 in the figure), the maximum length of the valve body inner diameter measuring scale is 3000mm ( Figure 1 In L1), the scale range of the first and second ends of the fixed section 1 is 0~750mm. Figure 1 (a) The accuracy is ±0.5mm. The scale is laser-etched onto the surface of fixed section 1. The scale groove is filled with white wear-resistant ceramic paint, which has good visibility and resistance to oil stains and scratches. It can be clearly read even in low light or harsh on-site conditions.

[0053] It should be noted that, therefore, the measurement range is 1500mm~3000mm (i.e., the retracted length is 1.5 meters, and the total length after full extension is 3 meters). The measurement length = reference length (1500mm) + the reading of the second scale of the left extension section + the reading of the second scale of the right extension section.

[0054] For example, if the reading of the secondary scale when the left telescopic section 2 is pulled out is 700mm and the reading of the secondary scale when the right telescopic section 2 is pulled out is 600mm, then: the measurement length = 1500 + 700 + 600 = 2800mm.

[0055] In one embodiment, the two telescopic sections 2 are provided with a closed plate at one end opposite to each other, and the measuring head 21 is conical and threadedly connected to the closed plate.

[0056] In one embodiment, the measuring head 21 is made of ABS. ABS has a density of only 1.05 g / cm³, enabling lightweight design, preventing metal from scratching the valve body surface, and protecting the valve body.

[0057] In one embodiment, both the fixed section 1 and the telescopic section 2 are made of aluminum alloy, and their surfaces are coated with an anodized film with a thickness ≥10μm. Specifically, the fixed section 1 and the telescopic section 2 are made of 6061-T6 aluminum alloy, with anodized surfaces, a film thickness ≥10μm, and a corrosion resistance level ≥9 in GB / T 19746-2005.

[0058] In one embodiment, refer to Figure 1 As shown, a mounting body 41 is provided in the middle of the fixed section 1, and the bubble level 4 is embedded in the surface of the mounting body 41. The mounting body 41 can be integrally formed with the fixed section 1. The bubble level 4 is parallel to the axis of the telescopic rod. The length of the bubble level 4 is 35mm, and the accuracy is ±0.5°, ensuring that the bubble is centered during measurement and eliminating tilt error.

[0059] Before use, nest the telescopic section 2 into the fixed section 1 to ensure smooth sliding; install the damping strip 3 (the inner wall is attached to the fixed section 1, and the outer wall is attached to the telescopic section 2), test the damping force (pushing and pulling resistance of 20~30N is acceptable). If it is unacceptable, directly pull out the telescopic section 2 for replacement, tighten the ABS measuring heads 21 at both ends, and check the reliability of the threaded connection.

[0060] Calibrate the level: Place the ruler on a standard horizontal platform, adjust the bubble position to the center, and mark the installation angle of the level (ensure it is parallel to the axis of the pole).

[0061] When measuring the inner diameter, the valve body inner diameter measuring ruler is in a fully retracted state when not in use, with an overall length of 1500mm. The two telescopic sections 2 are nested at the first and second ends of the fixed section 1, respectively. The two ends of the fixed section 1 are respectively equipped with scales (0~750mm) to indicate the amount of extension of the two telescopic sections 2.

[0062] The operator places the measuring ruler horizontally across the through-hole of the valve body to be measured, so that the two measuring heads 21 on the left and right sides contact the opposite inner walls of the valve body cavity. The operator can hold the fixed section 1 and either telescopic section 2 respectively, and push or pull the telescopic section 2 outward to adjust the measuring length. Because there is a silicone rubber damping strip 3 between the telescopic section 2 and the fixed section 1, the damping force is increased during the sliding process, so that the telescopic section 2 can move smoothly and stay stably at the target position.

[0063] During the deployment process, the bubble level 4 installed in the middle of the fixed section 1 should be observed to ensure that the bubble is centered, thus guaranteeing that the measuring ruler is horizontal. The level has an accuracy of ±0.5° and remains parallel to the telescopic axis.

[0064] Once the two telescopic sections 2 are in contact with the inner wall of the valve body and the measurement posture is calibrated, the readings can be taken. Take the scale values ​​of the fixed section 1 on the left and right sides respectively. Since the total length of the fixed section 1 is 1500mm, the total measurement length is calculated as follows: Measurement length = Reference length (1500mm) + Scale reading of the left telescopic section 2 + Scale reading of the right telescopic section 2.

[0065] After measurement, the user can push the telescopic section 2 back into the fixed section 1 to achieve structural storage, facilitating handling and storage. During routine maintenance, the elasticity and wear of the damping strip 3 should be checked periodically to ensure smooth pushing and pulling and stability. If damaged, the telescopic section 2 should be removed and replaced. Simultaneously, the graduation groove should be cleaned with a soft cloth dampened with alcohol to maintain clear and readable graduations.

[0066] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A valve body inside diameter gage, comprising: include: The fixed section (1) includes a first end and a second end that are arranged opposite to each other, and a groove (11) is provided along the surface axial direction of the fixed section (1). Two telescopic sections (2) are slidably connected to the first and second ends of the fixed section (1), respectively. A measuring head (21) is provided at the opposite ends of the two telescopic sections (2). A sliding cavity (22) is provided along the axial direction of each telescopic section (2) to slide with the fixed section (1). A damping strip (3) is provided on the side wall of the sliding cavity (22) to slide in contact with the sliding groove (11). The damping strip (3) can provide damping force when the telescopic section (2) slides along the fixed section (1). A bubble level (4) is installed in the middle of the fixed section (1).

2. A valve bore gauge according to claim 1, wherein, The groove (11) is a trapezoidal groove, and the cross section of the damping strip (3) is trapezoidal.

3. A valve bore gauge according to claim 1, wherein The damping strip (3) is made of silicone rubber.

4. A valve bore gauge according to claim 1, wherein The surface of the telescopic section (2) is provided with mounting holes (23), and the damping strip (3) is provided with mounting protrusions (31) embedded in the mounting holes (23).

5. A valve bore gauge according to claim 1 wherein, The nesting gap between the telescopic section (2) and the fixed section (1) is ≤0.2mm.

6. A valve bore gauge according to claim 1 wherein, The fixed section (1) is provided with scales along the length of its first and second ends, and the end of the telescopic section (2) is capable of indicating the reading of the scale.

7. A valve bore gauge according to claim 1 wherein, The two telescopic sections (2) are provided with a closed plate at one end opposite to each other, and the measuring head (21) is conical and threadedly connected to the closed plate.

8. A valve bore gauge according to claim 1 wherein, The measuring head (21) is made of ABS.

9. A valve bore gauge according to claim 1 wherein, Both the fixed section (1) and the telescopic section (2) are made of aluminum alloy and have an anodized film with a thickness of ≥10μm on their surfaces.

10. The valve bore gauge of claim 1 wherein, The middle part of the fixed section (1) is provided with an installation body (41), and the bubble level (4) is embedded in the surface of the installation body (41).

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