Method for protecting and blocking opening of large-size special-shaped pipe part
By using latex balloons to seal the openings of irregularly shaped tubes, the problems of poor sealing and high labor costs were solved, achieving tight sealing of the corners of irregularly shaped tubes and simplifying the manufacturing process.
Patent Information
- Application Number
- CN202610085407.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-22
- Publication Date
- 2026-03-17
AI Technical Summary
Existing methods for sealing openings in large-sized irregular-shaped tubular components suffer from poor sealing performance, high labor costs, and long manufacturing cycles. In particular, it is difficult to fill the corners tightly, leading to sealing failure.
Latex balloons are used to seal the openings of irregularly shaped tubes. By measuring and fitting the circumscribed circle, latex balloons of appropriate size are selected. During inflation, the center position is adjusted and the inflation rate is controlled to ensure dense filling at the corners.
It achieves a tight seal for the opening of irregularly shaped tubes, avoids gaps at corners, reduces labor costs, and shortens the manufacturing cycle.
Smart Images
Figure CN121676816A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of sealing openings in irregularly shaped pipes, specifically relating to a method for protecting and sealing openings in large-sized irregularly shaped pipe components. Background Technology
[0002] For large-sized, irregularly shaped pipe components, if foreign objects enter the pipe through its openings at both ends, they will inevitably cause significant impacts and even safety accidents to other supporting products during normal use. Therefore, protecting and sealing the openings of large-sized, irregularly shaped pipe components is a crucial measure to ensure safe use. Currently, the commonly implemented method in the industry is to extract the contour of the opening of the large-sized, irregularly shaped pipe component, use solid foam to shape it according to the contour, and then fill and seal it. However, due to the material properties of solid foam, cold processing methods are not applicable, and the mold-making cost is too high. Therefore, shaping is often done manually. The primary problem with this method is poor contour accuracy and poor sealing performance. Secondly, labor costs are high, with a single seal costing several thousand yuan. At the same time, a third problem caused by manual shaping is the long manufacturing and delivery cycle.
[0003] In existing technologies, there are methods that use airbags to seal the openings of large-sized, irregularly shaped tubular components. This involves placing an airbag inside the opening and inflating it to seal the opening. However, during the airbag inflation process, because the opening of the large-sized, irregularly shaped tubular component has corners, and the inflation position and pressure of the airbag are difficult to control, the airbag cannot completely fill the corner area, resulting in a gap between the airbag and the corner of the opening, ultimately causing the sealing to fail.
[0004] Therefore, in view of the above-mentioned problems existing in the prior art when sealing large-sized irregular-shaped pipe components, the present invention discloses a method for protecting and blocking the opening of large-sized irregular-shaped pipe components. Summary of the Invention
[0005] This invention discloses a method for preventing and blocking openings of large-sized irregular-shaped tubular components, which can quickly and densely fill the openings of large-sized irregular-shaped tubular components and avoid gaps at corners.
[0006] This invention is achieved through the following technical solution: A method for preventing and blocking openings in large-sized irregularly shaped tubular components includes the following steps: Step 1: Determine the opening outline shape of the irregular tube components. Classify irregular tube components with no sharp angles in their opening outline shape as Class I irregular tubes, and classify irregular tube components with sharp angles in their opening outline shape as Class II irregular tubes. For Class I irregular tubes, proceed to Step 2; for Class II irregular tubes, proceed to Step 3. Step 2: For the first type of irregular tube, measure the perimeter L1 of the opening profile, select a latex balloon, measure the maximum cross-sectional perimeter L2 of the latex balloon in the fully inflated state, measure the maximum cross-sectional perimeter L3 of the latex balloon in the non-inflated state, and select a latex balloon with L3≤L1≤L2 to seal the opening. Step 3: For the second type of irregular tube, establish a circumcircle based on the inflection point on the opening contour, and use a latex balloon to seal the opening based on the center position and circumference of the circumcircle.
[0007] To better realize the present invention, step 3 further includes: Step 3.1: Extract the inflection points on the opening contour, select three consecutive adjacent inflection points to fit the circumcircle, and ensure that the circumcircle encompasses the remaining inflection points inside the circumcircle or on the circumference of the circumcircle. Step 3.2: Select a latex balloon whose circumference is equal to the circumference of the circumference of the circumference when fully inflated, and whose circumference is smaller than the circumference of the circumference of the circumference when not inflated. Step 3.3: Place the non-inflated latex balloon into the opening, ensuring that the center of the latex balloon coincides with the center of the circumcircle. Step 3.4: Inflate the latex balloon in the first stage until the latex balloon contacts the inner wall of the opening and there is a gap between the latex balloon and the inflection point; Step 3.5: Extract the maximum gap width and compare it with the calibrated gap width range. If the maximum gap width falls within the calibrated gap width range, proceed to step 3.6. If the maximum gap width is outside the calibrated gap width range, deflate the latex balloon, then adjust the center position of the latex balloon towards the direction of the maximum gap, and repeat step 3.4 until the maximum gap width falls within the calibrated gap width range. Step 3.6: Inflate the latex balloon in the second stage, so that the latex balloon fills the corners of the three selected inflection points tightly. Use the three inflection points as control points to fix the latex balloon until the latex balloon completely fills and seals the opening.
[0008] To better realize the present invention, further, in step 3.1, the area where the circumscribed circle extends beyond the opening contour is marked as the filling area, and the area of each filling area is calculated; in step 3.6, the filling area is assisted in inflation, and the rate of assisted inflation decreases sequentially in order of decreasing area of the filling air.
[0009] To better realize the present invention, after the opening is completely filled and sealed, a precise feeler gauge is used to detect the fit between the latex balloon and the inner wall of the opening.
[0010] To better realize the present invention, after the opening is completely filled and sealed, the actual internal pressure of the latex balloon is detected, so that the optimal pressure ≤ actual internal pressure ≤ 1.2 times the optimal pressure.
[0011] To better realize the present invention, further, in step 1, the inflection point on the opening contour is extracted, and the included angle between the adjacent sides at the inflection point is measured. If there is at least one included angle that is acute on the shape of the opening contour, the shape of the opening contour is classified as a second type of irregular tube; if there is no included angle that is acute on the shape of the opening contour, the shape of the opening contour is classified as a first type of irregular tube.
[0012] To better realize the present invention, in step 2, a latex balloon with L3=L1 is selected to seal the opening.
[0013] To better realize the present invention, a thickened explosion-proof latex balloon is used to seal the opening.
[0014] Compared with the prior art, the present invention has the following advantages and beneficial effects: This invention can tightly seal the openings of irregularly shaped tubes of different shapes and specifications. In addition, considering the corners of irregularly shaped tubes, the invention optimizes the sealing method of the tubes with latex balloons, thereby ensuring that the inflated latex balloons can tightly seal the corners of the tubes and effectively avoid gaps at the joints of the tubes. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the process steps of the present invention; Figure 2 This is a schematic diagram of the second type of irregularly shaped tube; Figure 3 This is a schematic diagram of the first type of irregularly shaped tube; Figure 4 A schematic diagram for establishing the circumcircle for the first type of second-class irregular tube; Figure 5 A schematic diagram for establishing the circumcircle for the second type of irregular tube; Figure 6 This is a schematic diagram illustrating the use of latex balloons to seal the second type of irregularly shaped tube. Figure 7 A schematic diagram of the cross-section of a latex balloon in its inflated state. Detailed Implementation
[0016] Example 1: This embodiment provides a method for protecting and blocking the opening of large-sized irregularly shaped tubular components, such as... Figure 1 As shown, it includes the following steps: Step 1: Determine the opening outline shape of the irregular tube components. Classify irregular tube components with no sharp angles in their opening outline shape as Class I irregular tubes, and classify irregular tube components with sharp angles in their opening outline shape as Class II irregular tubes. For Class I irregular tubes, proceed to Step 2; for Class II irregular tubes, proceed to Step 3. like Figure 2 As shown, the opening profile contains an acute angle k1, therefore it is classified as a second type of irregular tube; as Figure 3 As shown, all the corners in the opening profile are obtuse angles k2, and there are no acute angles. Therefore, it is classified as a first-class irregular tube.
[0017] Step 2: For the first type of irregular tube, measure the perimeter L1 of the opening profile, select a latex balloon, measure the maximum cross-sectional perimeter L2 of the latex balloon in the fully inflated state, measure the maximum cross-sectional perimeter L3 of the latex balloon in the non-inflated state, and select a latex balloon with L3≤L1≤L2 to seal the opening. like Figure 3 , Figure 7 As shown, the perimeter of the first type of hexagonal irregular tube is six times its side length a, i.e., L1=6a. Therefore, a latex balloon with L3≤6a≤L2 is selected to seal the opening. Preferably, to ensure the sealing effect, a latex balloon with L3=6a is selected to seal the opening.
[0018] Step 3: For the second type of irregular tube, establish a circumcircle based on the inflection point on the opening contour, and use a latex balloon to seal the opening based on the center position and circumference of the circumcircle.
[0019] Furthermore, such as Figure 4 and Figure 5 As shown, step 3 specifically includes: Step 3.1: Extract the inflection points on the opening contour, select three consecutive adjacent inflection points to fit the circumcircle, and ensure that the circumcircle encompasses the remaining inflection points inside the circumcircle or on the circumference of the circumcircle. Step 3.2: Select a latex balloon whose circumference is equal to the circumference of the circumference of the circumference when fully inflated, and whose circumference is smaller than the circumference of the circumference of the circumference when not inflated. Step 3.3: Place the non-inflated latex balloon into the opening, ensuring that the center of the latex balloon coincides with the center of the circumcircle. Step 3.4: Inflate the latex balloon in the first stage until the latex balloon contacts the inner wall of the opening and there is a gap between the latex balloon and the inflection point; Step 3.5, as follows Figure 6As shown, the maximum gap width is extracted and compared with the calibrated gap width range. If the maximum gap width falls within the calibrated gap width range, proceed to step 3.6; if the maximum gap width is outside the calibrated gap width range, deflate the latex balloon, then adjust the center position of the latex balloon towards the direction of the maximum gap, and repeat step 3.4 until the maximum gap width falls within the calibrated gap width range. Step 3.6: Inflate the latex balloon in the second stage, so that the latex balloon fills the corners of the three selected inflection points tightly. Use the three inflection points as control points to fix the latex balloon until the latex balloon completely fills and seals the opening.
[0020] like Figure 5 As shown, three consecutive inflection points are used as control points to pre-fill the corners at these three points with a latex balloon, which is then used as control points to fix the balloon in place. Then, auxiliary inflation is applied to the filled area, with the inflation rate decreasing sequentially according to the size of the filled area.
[0021] Furthermore, thickened explosion-proof latex balloons are used to seal the openings, thereby preventing the latex balloons from rupturing at corners due to increased pressure.
[0022] Example 2: This embodiment discloses a method for protecting and blocking the opening of large-sized irregular-shaped tubular components, which is an optimization based on Embodiment 1, such as... Figure 5 and Figure 6 As shown, in step 3.1, the area where the circumscribed circle extends beyond the opening contour is marked as the filling area, and the area of each filling area is calculated; in step 3.6, the filling area is assisted in inflation, and the inflation rate decreases sequentially according to the area of the filling air from large to small.
[0023] like Figure 5 As shown, the area of filling zone 1 is less than the area of filling zone 2 and the area of filling zone 3. Therefore, when the three filling zones are assisted in inflation, the inflation rate of filling zone 1 is less than the inflation rate of filling zone 2 and the inflation rate of filling zone 3, thereby ensuring that the inflation expansion speed of the three filling zones is more uniform.
[0024] Furthermore, after completely filling and sealing the opening, a precise feeler gauge is used to check the fit between the latex balloon and the inner wall of the opening; after completely filling and sealing the opening, the actual internal pressure of the latex balloon is checked, ensuring that the optimal pressure is ≤ actual internal pressure ≤ 1.2 times the optimal pressure. The optimal pressure is determined based on the material of the shaped tube and the working conditions of the shaped tube.
[0025] The rest of this embodiment is the same as that of Embodiment 1, so it will not be described again.
[0026] Example 3: This embodiment discloses a method for protecting and blocking the opening of large-sized irregular-shaped tubular components, which is an optimization based on embodiment 1 or 2. In step 1, the inflection points on the opening contour are extracted, and the included angle between adjacent sides at the inflection points is measured, such as... Figure 2 As shown, if the opening profile has at least one acute angle, then the opening profile shape is classified as a second type of irregular tube; for example... Figure 3 As shown, if there is no acute angle in the opening profile shape, the opening profile shape is classified as the first type of irregular tube.
[0027] Since the opening profile of the first type of irregular tube does not have any acute angles, the latex balloon will not be subjected to large compressive forces at the corners, and can be filled and sealed in the same way as ordinary inflation.
[0028] Furthermore, in step 2, a latex balloon with L3=L1 is selected to seal the opening.
[0029] The rest of this embodiment is the same as that of embodiment 1 or 2, so it will not be described again.
[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.
Claims
1. A method of preventing the clogging of an opening protection plug for a large-sized irregularly shaped pipe member, characterized by, The method comprises the following steps: Step 1, determining the opening profile shape of the special-shaped tube part, classifying the special-shaped tube part with no sharp angle in the opening profile shape as the first type of special-shaped tube, and classifying the special-shaped tube part with a sharp angle in the opening profile shape as the second type of special-shaped tube; for the first type of special-shaped tube, going to step 2, and for the second type of special-shaped tube, going to step 3; Step 2, for the first type of special-shaped tube, measuring the circumference L1 of the opening profile, selecting a latex balloon, measuring the maximum cross-sectional circumference L2 of the latex balloon in the fully inflated state, measuring the maximum cross-sectional circumference L3 of the latex balloon in the non-inflated normal state, and selecting the latex balloon with L3≤L1≤L2 to seal the opening; Step 3, for the second type of special-shaped tube, establishing an inscribed circle based on the inflection points on the opening profile, and selecting a latex balloon to seal the opening based on the center position and the circumference of the inscribed circle.
2. The method according to claim 1, wherein The step 3 specifically comprises: Step 3.1, extracting the inflection points on the opening profile, fitting an inscribed circle with any three adjacent inflection points, and ensuring that the inscribed circle covers the remaining inflection points inside the inscribed circle or on the circumference of the inscribed circle; Step 3.2, selecting a latex balloon with the circumference equal to the circumference of the inscribed circle in the fully inflated state and the circumference less than the circumference of the inscribed circle in the non-inflated normal state; Step 3.3, placing the latex balloon in the non-inflated normal state into the opening, and making the center of the latex balloon coincide with the center of the inscribed circle; Step 3.4, inflating the latex balloon in the first stage until the latex balloon is in contact with the inner wall of the opening and there is a gap between the latex balloon and the inflection points; Step 3.5, extracting the maximum gap width, and comparing the maximum gap width with the calibrated gap width range, if the maximum gap width falls within the calibrated gap width range, going to step 3.6, if the maximum gap width is outside the calibrated gap width range, deflating the latex balloon, then adjusting the center position of the latex balloon towards the direction close to the maximum gap, and repeating step 3.4 until the maximum gap width falls within the calibrated gap width range; Step 3.6, inflating the latex balloon in the second stage to pre-fill and compact the inflection points at the selected three inflection points, fixing the latex balloon with the three inflection points as control points, until the latex balloon completely fills and seals the opening.
3. The method according to claim 2, wherein In the step 3.1, the area of each fill-in area outside the opening profile of the inscribed circle is marked as a fill-in area, and the area of each fill-in area is calculated; in the step 3.6, the fill-in area is assisted to be inflated, and the inflation rate is sequentially reduced according to the area of the fill-in area from large to small.
4. The method according to claim 3, wherein After the opening is completely filled and sealed, the precision plug gauge is used to detect the fit between the latex balloon and the inner wall of the opening.
5. The method according to claim 3, wherein After the opening is completely filled and sealed, the actual internal pressure of the latex balloon is detected, so that the best pressure ≤ the actual internal pressure ≤ 1.2 times the best pressure.
6. The method according to any one of claims 1 to 5, wherein In the step 1, the inflection points on the opening profile are extracted, the included angle between the adjacent edges at the inflection points is measured, if there is at least one acute angle in the opening profile shape, the opening profile shape is classified as the second type of special-shaped tube, if there is no acute angle in the opening profile shape, the opening profile shape is classified as the first type of special-shaped tube.
7. The method according to any one of claims 1 to 5, wherein the method is a method for protecting a large-sized irregular pipe member from a plug in an opening thereof. In the step 2, the latex balloon with L3=L1 is selected to seal the opening.
8. The method according to any one of claims 1-5, wherein, The opening is plugged by using a thickened anti-explosion rubber balloon.