A seal ring inner diameter detection tool

Abstract

The utility model discloses a kind of sealing ring inner diameter detection tools, including outer conical tube and guide pipe, the guide pipe and outer conical tube one end can be inserted, the outer circumferential surface of guide pipe movably has push tube, the outer conical tube is a gradually changing diameter pipe from small to big, when the guide pipe is inserted with outer conical tube, the small caliber end of outer conical tube is placed in push tube, outer conical tube side is equipped with scale side by side, sealing ring is sleeved on outer conical tube.The utility model is simple structure, convenient to operate, the inner diameter of sealing ring can be measured quickly and accurately.

Description

Technical Field

[0001] This utility model relates to the field of sealing ring testing technology, specifically a sealing ring inner diameter testing tool. Background Technology

[0002] Rotary Glyd rings are sealing rings made of PTFE slip rings and elastomers. They are widely used in mechanical devices in the medical, chemical, and food industries. Rotary Glyd rings are designed to meet the needs of different working conditions, both at high and low speeds, and must ensure low friction and strong sealing performance. The inner diameter of the rotary Glyd ring directly affects its friction and sealing performance.

[0003] After user acceptance or a certain period of use, users cannot directly determine whether the inner diameter of the rotating glyph meets the usage requirements. In the past, the inner diameter of the rotating glyph was usually measured with a flexible ruler. However, because the rotating glyph is made of a relatively soft material, manual inspection cannot guarantee that it is in an open ring shape, and it is easy to deform, which leads to inaccurate test results.

[0004] Therefore, it is necessary to provide a tool that facilitates the detection of the inner diameter of a rotating Glyph. Utility Model Content

[0005] This invention proposes a tool for detecting the inner diameter of a sealing ring, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A sealing ring inner diameter testing tool includes an outer conical tube and a guide tube. One end of the guide tube and the outer conical tube can be inserted into each other. A push tube is movably sleeved on the outer circumference of the guide tube. The outer conical tube is a tube with a gradually changing diameter from small to large. When the guide tube and the outer conical tube are inserted, the small diameter end of the outer conical tube is placed inside the push tube. A scale is provided side by side on one side of the outer conical tube. A sealing ring is fitted on the outer conical tube.

[0008] Preferably, the lower outer side of the push tube is provided with a reading pointer, and the upper part of the push tube is provided with a counterweight groove, in which a counterweight ring is placed. The combined weight of the push tube and the counterweight ring is approximately 1 kg, ensuring that when the push tube contacts and presses down on the sealing ring, the inner surface of the sealing ring being measured can fully contact the outer conical tube, guaranteeing that the sealing ring is in a fully open circular shape and improving measurement accuracy. The outer diameter of the outer conical tube matches the reading value on the scale. When testing sealing rings of different sizes, the corresponding outer conical tube and scale need to be replaced.

[0009] Preferably, the top of the outer conical tube has an inner step, and the bottom of the guide tube has an outer step, with the inner step and the outer step being inserted and connected accordingly. The length of the push tube is longer than that of the outer conical tube.

[0010] Preferably, the scale has a base at its bottom, and reading values ​​are vertically arranged at equal intervals on the scale, with the reading values ​​increasing sequentially from top to bottom. The length of each reading value is the same as the length of the outer conical tube, which has a minimum diameter of d and a maximum diameter of d+1mm. The variation in the value indicated by the reading corresponds to the variation in the diameter of the outer conical tube, i.e., the range of the indicated reading values ​​is 0.1mm-0.9mm. When inspecting the sealing ring, if the position pointed to by the reading pointer exceeds the range indicated by the tolerance of the inner diameter of the tested rotating Glyd ring, the inner diameter of the sealing ring is considered unqualified; otherwise, it is considered qualified.

[0011] Preferably, the sealing ring is a rotating Gladius ring, and the scale is a transparent glass scale. Using a transparent glass scale facilitates observation by staff.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention places a scale on one side of the outer conical tube. The readings marked on the scale are the tolerance values ​​corresponding to the changes in the diameter of the outer conical tube. It can be realized that by connecting a push tube to the guide tube, the push tube and the counterweight ring can press the sealing ring down. Since the outer diameter of the outer conical tube gradually decreases from bottom to top, the sealing ring is at its maximum opening state when it stops moving downward, thus avoiding deformation. The inner diameter of the sealing ring under test can be obtained by reading the corresponding scale value through the reading pointer. Attached Figure Description

[0014] Figure 1 This is a side cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the outer conical tube of this utility model;

[0016] Figure 3 This is a schematic cross-sectional view of the guide tube of this utility model.

[0017] Figure 4 This is a schematic cross-sectional view of the push tube of this utility model.

[0018] Figure 5 This is a schematic diagram of the side structure of the scale of this utility model;

[0019] 1. Outer conical tube; 11. Inner step; 2. Sealing ring; 3. Guide tube; 31. Outer step; 4. Push tube; 41. Reading pointer; 42. Counterweight groove; 43. Counterweight ring; 5. Scale; 51. Base; 52. Reading value. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Reference Figure 1-5 A sealing ring inner diameter testing tool includes an outer conical tube 1 and a guide tube 3. One end of the guide tube 3 and the outer conical tube 1 can be inserted into each other. A push tube 4 is movably fitted onto the outer circumference of the guide tube 3. The outer conical tube 1 is a tube with a gradually changing diameter from small to large. When the guide tube 3 and the outer conical tube 1 are inserted, the smaller diameter end of the outer conical tube 1 is placed inside the push tube 4. A scale 5 is arranged side-by-side on one side of the outer conical tube 1. A sealing ring 2 is fitted onto the outer conical tube 1. The length of the push tube 4 is longer than that of the outer conical tube 1.

[0022] The lower outer side of the push tube 4 is provided with a reading pointer 41, and the upper part of the push tube 4 is provided with a counterweight groove 42, in which a counterweight ring 43 is placed. The combined weight of the push tube 4 and the counterweight ring 43 is approximately 1 kg, ensuring that when the push tube 4 contacts and presses down on the sealing ring 2, the inner surface of the sealing ring 2 being measured can fully contact the outer conical tube 1, guaranteeing that the sealing ring 2 is in a fully open annular shape, thus improving the accuracy of the measurement. The outer diameter of the outer conical tube 1 matches the reading value 52 on the scale 5. When testing sealing rings 2 of different sizes, the corresponding outer conical tube 1 and scale 5 need to be replaced.

[0023] The outer conical tube 1 has an inner step 11 at the top and the guide tube 3 has an outer step 31 at the bottom. The inner step 11 and the outer step 31 are connected by insertion.

[0024] The scale 5 has a base 51 at its bottom, and reading values ​​52 are vertically arranged at equal intervals on the scale 5, increasing sequentially from top to bottom. The length of the reading value 52 is the same as the length of the outer conical tube 1. For example, if the rotating shaft diameter corresponding to a certain specification of sealing ring 2 is d, then the minimum diameter of the designed outer conical tube 1 is d-1, and the maximum diameter is dmm. The change in the value marked by the reading value 52 corresponds to the change in the diameter of the outer conical tube 1, that is, the range of the value marked by the reading value 52 is 0.1mm-0.9mm. When inspecting the sealing ring 2, if the position pointed to by the reading pointer 41 exceeds the range marked by the reading value 52 determined by the tolerance of the inner diameter of the tested rotating Glyd ring, then the inner diameter of the sealing ring 2 is unqualified; otherwise, it is qualified.

[0025] The sealing ring 2 is a rotating Gladius ring, and the scale 5 is a transparent glass scale. The use of a transparent glass scale facilitates observation by staff.

[0026] In use, the guide tube 3 is inserted into the top of the outer conical tube 1 by connecting the inner step 11 and the outer step 31. The scale 5 is placed on one side of the outer conical tube 1, and the scale 5 and the outer conical tube 1 must be on the same plane. The sealing ring 2, i.e., the rotating glyph, is placed on the outer circumference of the outer conical tube 1. The push tube 4 is fitted onto the guide tube 3, and the bottom of the push tube 4 contacts the sealing ring 2. The counterweight ring 43 is placed on the counterweight groove 42, so that the push tube 4 applies downward pressure to the sealing ring 2. Since the outer diameter of the outer conical tube 1 gradually decreases from bottom to top, when the sealing ring 2 stops moving downward, the reading value 52 corresponding to the reading pointer 41 is read through the scale 5. The inner diameter of the tested sealing ring 2 can be determined by the reading value 52.

[0027] This utility model has a simple structure and is easy to operate, and can quickly and accurately measure the inner diameter of the sealing ring 2.

[0028] Example 2

[0029] A method for detecting the inner diameter of a rotating Glydring based on the above-mentioned tool includes the following steps:

[0030] S1 connects the guide tube and the outer cone tube. Align the outer step 31 at the bottom of the guide tube 3 with the inner step 11 at the top of the outer cone tube 1, and forcefully insert it to ensure that the inner step 11 and the outer step 31 are tightly connected to each other, so as to ensure that the guide tube 3 and the outer cone tube 1 are firmly connected without any loosening or shaking.

[0031] S2 Place the scale: Place the scale 5 on one side of the outer conical tube 1 through the bottom base 51, and adjust the position of the scale 5 so that it is on the same plane as the outer conical tube 1, so as to accurately observe the correspondence between the reading pointer 41 and the reading value 52 later.

[0032] S3 carefully places the sealing ring 2 (rotating Glyd ring) to be tested onto the outer circumferential surface of the outer conical tube 1, ensuring that the sealing ring 2 is completely fitted into the outer conical tube 1 and is in the correct position without any skewing or twisting, so that the sealing ring 2 is in its natural state.

[0033] S4 movably fits the push tube 4 onto the outer circumferential surface of the guide tube 3, so that the bottom of the push tube 4 contacts the upper surface of the sealing ring 2. Next, a counterweight ring 43 is placed in the counterweight groove 42 at the top of the push tube 4, ensuring that the counterweight ring 43 is placed stably. At this time, the total weight of the push tube 4 and the counterweight ring 43 is about 1kg, so as to ensure that when the push tube 4 is pressed down later, the inner ring surface of the tested sealing ring 2 can fully contact the outer cone tube 1, so that the sealing ring 2 is in a fully opened annular shape.

[0034] S5 gently guides the push tube 4, allowing it to move downwards naturally under its own weight and the weight ring 43, applying downward pressure to the sealing ring 2. Since the outer conical tube 1 has a gradually increasing diameter, as the push tube 4 is pressed down, the sealing ring 2 will gradually move downwards along the outer circumference of the outer conical tube 1. When the sealing ring 2 stops moving downwards, maintain the current state and observe the reading value 52 on the scale 5 pointed to by the reading pointer 41 on the lower outer side of the push tube 4.

[0035] S6 reads the reading value 52 on the scale 5 pointed to by the reading pointer 41, ensuring that the line of sight is perpendicular to the scale 5 when reading to avoid visual errors. Record the read value accurately.

[0036] Based on the marked range (0.1mm-0.9mm) of the reading value 52 on the scale 5, determine whether the position pointed to by the reading pointer 41 is within the tolerance range of the inner diameter of the sealing ring 2. If the position pointed to by the reading pointer 41 exceeds the range marked by the tolerance of the inner diameter of the sealing ring 2, the inner diameter of the sealing ring 2 is deemed unqualified; conversely, if it is within the marked range, the inner diameter of the sealing ring 2 is deemed qualified.

[0037] In addition, before testing, select a matching outer conical tube 1 and scale 5 according to the size of the sealing ring 2 to be tested, ensuring that the outer diameter of the outer conical tube 1 matches the reading value 52 on the scale 5. Carefully check the inner step 11 of the outer conical tube 1 and the outer step 31 of the guide tube 3 to confirm that there is no wear, deformation or other damage, and ensure that the two can be smoothly inserted. Check whether the lower outer reading pointer 41 of the push tube 4 is clear and firm, whether the upper counterweight groove 42 is clean and free of debris, and whether the counterweight ring 43 is complete and the weight meets the requirements (the push tube 4 and the counterweight ring 43 together are about 1kg). At the same time, check whether the bottom base 51 of the scale 5 is intact, whether the scale 5 is made of transparent glass, whether the reading values ​​52 set vertically at the same intervals are clear and legible, and whether the length of the reading value 52 is the same as the length of the corresponding outer conical tube 1. The minimum diameter of the outer conical tube 1 is d-1, the maximum diameter is dmm, and the range of the reading value 52 is 0.1mm-0.9mm.

[0038] When it is necessary to test the sealing ring 2 of different sizes, the currently used outer cone tube 1, scale 5, push tube 4, counterweight ring 43 and sealing ring 2 and other components must be disassembled first. According to the pre-test preparation steps, select the outer cone tube 1 and scale 5 that match the size of the new sealing ring, and repeat the above test steps to test.

[0039] In addition to the above tests, the following performance tests of the rotating Glyph can also be performed:

[0040] Sealing ring roundness: If the sealing ring has a roundness error (not a perfect circle), the reading pointer of the push tube may show "unstable deviation" when it is in contact with the outer conical tube (such as the edge of the pointer not being completely aligned with the scale). By rotating the sealing ring (keeping the outer conical tube stationary), read the pointer position multiple times. If the value fluctuates by more than 0.05mm, it can be determined that its roundness is unqualified.

[0041] Sealing ring elasticity (recovery performance): After measurement, remove the counterweight ring and push tube, and observe the shrinkage speed of the sealing ring after it is removed from the outer cone tube: if the inner diameter after shrinkage deviates too much from the reading at the time of measurement (e.g., more than 0.1mm), it indicates that its elasticity is insufficient (which may affect the sealing effect).

[0042] Degree of wear or deformation on the surface of the sealing ring: Take multiple measurements on the same sealing ring (at certain intervals or after a certain number of uses). If the pointer reading gradually exceeds the acceptable range (e.g., from 0.5mm to 0.95mm), it indicates that the inner diameter of the sealing ring may have increased due to wear or permanent deformation, which can indicate that its service life has decreased.

[0043] Sealing ring hardness (indirectly reflected): Replace with counterweight rings of different weights (e.g., 0.8kg, 1.2kg) and compare the changes in pointer readings: If the weight change has a large impact on the reading (e.g., a 0.2kg difference causes the reading to fluctuate by more than 0.1mm), it indicates that the sealing ring hardness is too low (easily deformed under pressure); if the impact is too small, the hardness may be too high (easily leaks when sealing).

[0044] The testing tool has a reasonable structural design, which can quickly and accurately measure the required inner diameter of the sealing ring, and can also be used to test and evaluate the roundness, elasticity, wear degree and hardness of the sealing ring.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tool for detecting the inner diameter of a sealing ring, characterized in that, It includes an outer conical tube (1) and a guide tube (3). One end of the guide tube (3) and the outer conical tube (1) can be inserted. A push tube (4) is movably sleeved on the outer circumferential surface of the guide tube (3). The outer conical tube (1) is a tube with a diameter that gradually changes from small to large. When the guide tube (3) and the outer conical tube (1) are inserted, the small diameter end of the outer conical tube (1) is placed inside the push tube (4). A scale (5) is provided side by side on one side of the outer conical tube (1). A sealing ring (2) is fitted on the outer conical tube (1).

2. The sealing ring inner diameter testing tool according to claim 1, characterized in that, The lower outer side of the push tube (4) is provided with a reading pointer (41), and the upper part of the push tube (4) is provided with a counterweight groove (42), in which a counterweight ring (43) is placed.

3. The sealing ring inner diameter testing tool according to claim 1, characterized in that, The outer conical tube (1) has an inner step (11) at the top and an outer step (31) at the bottom of the guide tube (3). The inner step (11) and the outer step (31) are connected by insertion.

4. The sealing ring inner diameter testing tool according to claim 1, characterized in that, The scale (5) has a base (51) at the bottom, and the scale (5) has vertical reading values ​​(52) at the same intervals, with the reading values ​​(52) increasing sequentially from top to bottom.

5. The sealing ring inner diameter testing tool according to claim 1, characterized in that, The sealing ring (2) is a rotating Gladius ring, and the scale (5) is a transparent glass scale.

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