Large-diameter socket pipeline rubber ring mounting tool and method
By designing an installation tool including frame structure and power device, using the pulling and up and down movement of the rope, the rubber ring of the large-diameter bearing pipe is quickly installed, solving the problem of low manual installation efficiency and the inability to be suitable for large-diameter products, and improving the installation efficiency and sealing toughness of the rubber ring.
Patent Information
- Application Number
- CN202510335622.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2025-05-23
AI Technical Summary
In the construction of large-diameter bearing pipes, manual installation of rubber rings is inefficient, especially when the rubber ring is large, the human body cannot complete the installation work. The existing tooling structure is complex and cannot be suitable for large-diameter products.
An installation tool including a frame structure, a first power device, a second power device and a rope is designed. Through the design of the frame structure and the driving of the power device, the horizontal pulling and up and down movement of the rope are realized, and the installation of the rubber ring is automatically completed.
It improves the installation efficiency of rubber rings, reduces labor output, ensures consistency in force during installation, avoids deformation and damage of rubber rings, and is suitable for product installation of various diameters and specifications, without the need to replace tooling of different specifications.
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Figure CN120024043A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of large-diameter bell-and-spigot pipe connection and sealing, and in particular to an installation tool and a method for realizing rapid installation of a rubber ring in the construction of a large-diameter bell-and-spigot pipe. Background Art
[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.
[0003] Socket-jointed anti-corrosion steel pipes have an increasing market share in pipeline engineering applications due to their quick installation characteristics. Due to the properties of the pipes themselves, the pipes are sealed by rubber rings. At least one rubber ring is required in each pipe. In engineering applications, the pipe specifications range from DN100 to DN2600. Due to the application properties, large-diameter products are widely used, and the matching rubber ring specifications are also large. When installing rubber rings on pipes, the efficiency of installing rubber rings is low due to the limitation of human physical fitness, and when the rubber ring specifications exceed a certain specification, the human body cannot pull the rubber ring to carry out the relevant rubber ring installation work; some rubber ring installation tools are disclosed in the prior art, such as: CN112757654A , CN214646017U , CN116852316A However, the existing installation tooling structures are relatively complex, and some cannot be used for the installation of large-diameter socket pipe rubber rings. Summary of the invention
[0004] In order to solve this type of problem, the present invention discloses a large-diameter socket pipe rubber ring installation tool and method, which can realize the function of the tool automatically installing the rubber ring only by manually placing the pipe and the rubber ring in a fixed position of the tool installation.
[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:
[0006] In a first aspect, an embodiment of the present invention provides a large-diameter bell-and-spigot pipe rubber ring installation tool, comprising a frame structure, a first power device, a second power device, and a rope;
[0007] A group of first power devices and second power devices are arranged at the left end of the frame structure, and a group of first power devices and second power devices are also arranged at the right end, wherein the second power devices at the left and right ends are symmetrically arranged and located on the same straight line, and the two first power devices drive the two second power devices to move upward or downward synchronously; the two second power devices are connected to the two ends of the same rope at the same time, and can pull the rope horizontally outward or inward at the same time to achieve the installation of the sealing rubber ring.
[0008] As a further technical solution, the left and right ends of the frame structure are frame beam structures, and the middle forms an installation space for a large-diameter socket pipe rubber ring.
[0009] As a further technical solution, the rope has a set length and strength; it is generally longer than the outer diameter circumference of the rubber ring of the pipe to be installed at the installation position.
[0010] As a further technical solution, a telescopic fixing device can be provided on the top of the frame structure to fix the sealing rubber ring from the top to prevent the rope from falling off during the installation process.
[0011] As a further technical solution, the second power device is installed on a mounting seat, the first power device drives the mounting seat and the second power device to move up and down together, and the mounting seat is slidably connected to the frame structure.
[0012] As a further technical solution, a slide rail is provided on the frame structure, and the mounting seat moves along the slide rail.
[0013] As a further technical solution, the two second power devices are driven simultaneously by one first power device.
[0014] As a further technical solution, the two second power devices are replaced by one second power device, and the one second power device drives the two ends of the rope through a transmission device.
[0015] In a second aspect, based on the above device, the present invention also provides an installation method, which is as follows:
[0016] Place the rubber ring pipe to be installed at a relatively suitable position of the frame structure, and ensure that the groove on the rubber ring to be installed on the pipe is in the same plane as the fixing rope point of the second power device;
[0017] Fix the two ends of the rope on the second power device respectively, fold the rope in half starting from the center of the rope, and then pass it through the sealing rubber ring. After the sealing rubber ring is inserted to a certain length, place the center of the rope in the groove of the rubber ring installed at the top of the pipe. At this time, the two ends are arranged on both sides of the pipe respectively, and the second power device is controlled to move to the lower end of the pipe. At this time, fix part of the sealing rubber ring into the groove of the rubber ring installed at the bottom of the pipe; adjust the extension length of the second power device, and pull the rope to preliminarily position and tighten the sealing rubber ring;
[0018] Then control the first power device to drive the two second power devices to move upward gradually and simultaneously, and adjust the extension length of the two second power devices at any time during the upward movement so that the tensioning rope always remains parallel to the ground. During the process, the rubber ring is driven to gradually move into the groove of the pipe through the tensioning force of the rope until the rope rises to the top of the pipe and brings all the rubber rings into the groove of the pipe fixing rubber ring, completing the installation of the rubber ring.
[0019] In a third aspect, based on the above device, the present invention also provides another installation method, which is as follows:
[0020] Place the rubber ring pipe to be installed at a relatively suitable position of the frame structure, and ensure that the groove on the rubber ring to be installed on the pipe is in the same plane as the fixing rope point of the second power device;
[0021] Put the rope into the groove at the end of the pipe from top to bottom, and extend the two ends of the rope to the bottom of the two sides of the groove at the end of the pipe, and then pass the two ends of the rope through the rubber ring, extend to the two sides respectively, and connect to the two second power devices;
[0022] At this time, fix the rubber ring part into the rubber ring installation groove at the bottom of the pipe; adjust the extension length of the second power device, and pull the rope to preliminarily position and tighten the sealing rubber ring;
[0023] Then control the first power device to drive the two second power devices to move upward gradually and simultaneously, and adjust the extension length of the two second power devices at any time during the upward movement so that the tensioning rope always remains parallel to the ground. During the process, the rubber ring is driven to gradually move into the groove of the pipe through the tensioning force of the rope until the rope rises to the top of the pipe and brings all the rubber rings into the groove of the pipe fixing rubber ring, completing the installation of the rubber ring.
[0024] One or more technical solutions of the present invention have the following beneficial effects:
[0025] 1. Compared with manual installation of rubber rings, the use of this tooling to install rubber rings can achieve one-time quick installation under the premise of meeting the tensile force of the rubber ring, because the equipment force is adjustable, which reduces labor output, improves installation efficiency, and can better match the production rhythm of the assembly line.
[0026] 2. Using tooling to install the rubber ring can ensure consistent force and quick installation during the installation process, avoiding the risk of long-term pulling of the rubber ring due to improper installation for a long time, causing the rubber ring to stretch, deform, or be damaged. To a certain extent, it better protects the rubber ring's tensile and compressive properties, ensuring that the rubber ring maintains good sealing toughness in product applications;
[0027] 3. Use this tooling to install rubber rings. By designing the tooling frame to be large enough and the stroke of the power device to be long enough, it is possible to install rubber rings for products of various calibers and specifications. There is no need to replace multiple toolings as product models are switched. One machine can complete the production of various specifications and models in one process, reducing the redundant configuration of equipment specifications. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0029] Figure 1 This is a schematic diagram of the initial state of the rubber ring of the present invention being installed;
[0030] Figure 2 This is a schematic diagram of the rubber ring of the present invention being installed near the end;
[0031] In the figure, 1. pipe, 2. installation tool, 2-1. frame structure, 2-2. second power device, 2-3. rope, 2-4. first power device, 3. sealing rubber ring; DETAILED DESCRIPTION
[0032] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples without specifying specific conditions are usually carried out under conventional conditions or under conditions recommended by the manufacturer.
[0033] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0034] The present invention will be further described in detail below in conjunction with specific embodiments. It should be noted that the specific embodiments are intended to explain the present invention rather than to limit it.
[0035] In order to solve the installation problem of large-diameter socket pipe rubber rings, this embodiment proposes a socket pipe rubber ring installation tool 2 and an installation method. The idea of the invention is to lay a rope 2-3 with sufficient strength along the groove of the pipe 1 where the rubber ring is to be installed, and place the two ends of the rope 2-3 at the bottom of the pipe 1, and then put the rubber ring into the two ends of the rope 2-3, and then fix the two ends of the rope 2-3 to the tooling with tensile power on both sides of the pipe 1, and then start the tooling to pull the two ends of the rope 2-3 away from the center of the pipe 1. By opening the two sides of the rope 2-3, the rubber ring is forced to gradually expand from the bottom of the pipe to the top of the pipe and be put on the pipe 1. When the tooling pulls the two ends of the rope 2-3 to a sufficient length to stretch the pipe 1 to the top of the pipe in a straight line, the rubber ring installation can be completed.
[0036] This embodiment discloses a socket-and-spigot pipe rubber ring installation tool 2, comprising a frame structure 2-1, a first power device 2-4, a second power device 2-2, and a rope 2-3;
[0037] A group of first power devices 2-4 and second power devices 2-2 are arranged on the left side of the frame structure 2-1, and a group of first power devices 2-4 and second power devices 2-2 are also arranged on the right side, wherein the second power devices 2-2 on the left and right sides are symmetrically arranged and located on the same straight line, and the two first power devices 2-4 drive the two second power devices 2-2 to move upward or downward synchronously; the two second power devices 2-2 are simultaneously connected to the same rope 2-3, and the two ends of the rope 2-3 are fixed, and the rope 2-3 can be pulled horizontally outward or inward at the same time to achieve the installation of the rubber ring; compared with manual installation of the rubber ring, the use of the tooling to install the rubber ring, because the equipment strength is adjustable, can achieve one-time quick installation under the premise of meeting the tensile force of the rubber ring, thereby reducing labor output, improving installation efficiency, and better matching with the production rhythm of the assembly line. Using tooling to install rubber rings can ensure consistent force and quick installation during the installation process, avoiding the risk of stretching, deformation, and damage to the rubber ring caused by long-term pulling of the rubber ring due to improper installation for a long time during manual installation. To a certain extent, it better protects the tensile and compressive properties of the rubber ring, ensuring that the rubber ring maintains good sealing toughness during product applications; by designing the tooling frame to be large enough and the stroke of the power device to be long enough, it is possible to install rubber rings for products of various calibers and specifications, without the need for multiple tooling to be replaced as product models are switched, and one machine can complete the production of various specifications and models in one process, reducing the redundant configuration of equipment specifications.
[0038] Specifically, the first power device 2-4 can be a linear motor, and the second power device 2-2 is installed on a mounting seat, and the mounting seat is slidably matched with the frame structure 2-1; the linear motor directly drives the mounting seat to perform linear motion; or the first power device 2-4 is a servo motor, and the servo motor drives the mounting seat to perform linear motion through a screw transmission device, or the first power device 2-4 is a high-precision electric cylinder drive device, and the electric cylinder drive device drives the mounting seat to perform linear motion.
[0039] Specifically, the second power device 2-2 can be designed to be any power device such as a cylinder with sufficient stroke, a sliding screw or a winding rope that can pull the rope 2-3 arranged along the circumference of the pipe 1 into a straight line. The second power device 2-2 is configured with two pieces symmetrically arranged along both sides of the pipe 1, or it can be designed as one piece but with two branch end pieces, or it can be configured with only one piece to always fix the other side of the rope 2-3 end, and the rubber ring can be installed by tightening and moving only one side of the power device.
[0040] The second power device 2-2 has a telescopic function. When it is installed, it is fixed with the rope 2-3 and can tighten the rope 2-3 through the contraction function. When the rubber ring is installed, the rope 2-3 is restored to a relaxed state through the extension function.
[0041] Furthermore, the rope 2-3 can be a soft strip of any material with sufficient strength, a smooth surface, and no sharp protrusions, edges, or corners that are easy to damage the rubber ring. Specifically, the rope 2-3 is a rope 2-3 with sufficient strength and length. The rope 2-3 has the strength to pull the rubber ring apart, and the length is greater than the circumference of the pipe 1 to be installed with the rubber ring. When in use, the rope 2-3 is first laid along the groove where the rubber ring is installed and fixed on the pipe 1.
[0042] The above-mentioned rubber ring installation is to use the tension of the rope 2-3 to tighten the rubber ring and bring it into the groove where the rubber ring is fixed on the pipe 1. Specifically, the rubber ring is first inserted into the rope 2-3, and the rope 2-3 is laid along the circumference of the pipe 1. The intersection position with the rubber ring set is the dividing point. In the initial stage, most of the rope 2-3 is fixed in the groove where the rubber ring is installed on the pipe 1, and the rubber ring that is inserted into the rope 2-3 is installed in the remaining groove of the pipe 1. By tightening the rope 2-3, the groove is gradually disengaged from the groove and the rubber ring is guided into the groove until all the rubber rings are fixed in the groove to complete the installation.
[0043] Furthermore, the frame structure 2-1 in this embodiment is a frame structure 2-1 with a fixed first power device 2-4 and a second power device 2-2. The structure supports the first power device 2-4, the second power device 2-2 and the pipe 1, and adjusts the height position of the second part in combination with the second part pull rope 2-3, so as to support and move the second part. Specifically, the left and right ends of the frame structure 2-1 are frame beam structures, and a mounting space for a large-diameter socket pipe rubber ring is formed in the middle. Mounting seats are provided on the frame beam structures at the left and right ends, and the second power device 2-2 is installed on the corresponding mounting seats; the first power device 2-4 drives the mounting seat and the second power device 2-2 to move up and down together, and the mounting seat is slidably connected to the frame structure 2-1; a slide rail is provided on the frame structure 2-1, and the mounting seat moves along the slide rail.
[0044] The lifting or moving power device of the tooling fixed frame described above realizes the function of the power device driving the rope 2-3 to arrange the rope 2-3 initially along the circumference of the pipe 1 until it is completely pulled into a straight line.
[0045] One end of the above-mentioned bell-and-spigot pipe 1 has a groove for fixing the rubber ring. Before installing the rubber ring, first pass the rope 2-3 on the installation tool 2 through the rubber ring, and then lay the rubber ring along the groove of the pipe 1, place the two ends of the rope 2-3 at the bottom end of the pipe 1 and make the rubber ring part that penetrates the rope 2-3 fit into the groove of the rubber ring installation of the pipe 1, and then connect the two ends of the rope 2-3 to the two connecting sections of the second part of the tool respectively, start the second part of the tool to pull the two ends of the rope 2-3 to the two sides away from the axis of the pipe 1 respectively. During the pulling process, the rubber ring is inserted into the rope 2-3, and the rubber ring is expanded and pulled by the force of the rope 2-3. Gradually expand and pull the rope 2-3 from both sides of the bottom of the pipe to the groove of the pipe 1. As the rope 2-3 is pulled away, the third part of the tooling is combined with the rope 2-3 to communicate and fit the pipe 1 to synchronously lift the second part to ensure that the height of the contact position between the second part of the tooling and the end of the rope 2-3 is consistent with the height at which the rope 2-3 and the groove of the pipe 1 are about to separate, until the rope 2-3 is pulled into a straight line and all the rubber rings are sent into the groove of the pipe 1 to complete the installation of the rubber ring. At this time, control the second part of the work to loosen the rope 2-3 to keep it in a relaxed state, and then move the installed pipe 1 to the next process to install the rubber ring of the next pipe 1.
[0046] Specifically, based on the above-mentioned socket pipe rubber ring installation tool 2, this embodiment also provides an installation method, which is as follows:
[0047] See also Figure 1 , Figure 2, during application, place the rubber ring pipe 1 to be installed at a relatively appropriate position on the installation tooling 2, ensure that the groove on the rubber ring to be installed on the pipe 1 and the fixed rope points of the power devices 2-2 on both sides of the installation tooling 2 are in the same plane. Fix the two ends of the rope 2-3 to the power devices 2-2 on both sides of the installation tooling 2 respectively. Fold the rope 2-3 with the center of the rope 2-3 as the starting point, then pass it through the sealing rubber ring 3. After passing the sealing rubber ring 3 through a certain length, place the center of the rope 2-3 into the groove for installing the sealing rubber ring at the top of the pipe 1, and arrange the two ends on both sides of the pipe 1 respectively. Control the installation tooling 2 through the control device to adjust the height position of the power device 2-2 to the lower end of the pipe 1, and fix a part of the inserted sealing rubber ring 3 to the groove for installing the sealing rubber ring at the bottom of the pipe 1. Adjust the extended length of the second power device 2-2, pull the rope 2-3 to initially position and fix the sealing rubber ring 3 tightly. Control the power device 2-2 to gradually tighten the rope 2-3, and control the lifting power device 2-2 of the frame structure 2-1 during the tightening process, so that the tightened rope 2-3 is always parallel to the ground. During the process, drive the sealing rubber ring 3 to gradually move into the groove for the sealing rubber ring of the pipe 1 through the tension force of the rope 2-3 until the rope 2-3 rises to the top of the pipe 1 and brings the sealing rubber ring 3 completely into the groove for fixing the sealing rubber ring of the pipe 1, completing the installation of the sealing rubber ring 3.
[0048] Furthermore, this embodiment also provides another installation method, which is as follows:
[0049] Place the pipe 1 with the sealing rubber ring 3 to be installed at a relatively appropriate position on the frame structure 2-1, and ensure that the groove on the sealing rubber ring 3 to be installed on the pipe 1 and the fixed rope points of the second power device 2-2 are in the same plane;
[0050] Put the rope 2-3 on the groove at the end of the pipe 1 from top to bottom, and the two ends of the rope 2-3 extend to the lower sides of both sides of the groove at the end of the pipe 1. Then pass the two ends of the rope 2-3 through the sealing rubber ring 3, extend them to both sides respectively, and connect them to the two second power devices 2-2;
[0051] At this time, fix a part of the sealing rubber ring 3 to the groove for installing the sealing rubber ring 3 at the bottom of the pipe 1; adjust the extended length of the second power device 2-2, and pull the rope 2-3 to initially position and fix the sealing rubber ring 3 tightly;
[0052] Then control the first power device 2-4 to drive the two second power devices 2-2 to move upward gradually and simultaneously, and adjust the extended lengths of the two second power devices 2-2 at any time during the upward movement process, so that the tightened rope 2-3 is always parallel to the ground. During the process, drive the sealing rubber ring 3 to gradually move into the groove of the pipe 1 through the tension force of the rope 2-3 until the rope 2-3 rises to the top of the pipe 1 and brings the sealing rubber ring 3 completely into the groove for fixing the sealing rubber ring 3 of the pipe 1, completing the installation of the sealing rubber ring 3.
[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A large-diameter socket pipe rubber ring installation tool, characterized in that: It includes a frame structure, a first power device, a second power device, and a rope; A group of first power devices and second power devices are arranged at the left end of the frame structure, and a group of first power devices and second power devices are also arranged at the right end, wherein the second power devices at the left and right ends are symmetrically arranged and located on the same straight line, and the two first power devices drive the two second power devices to move upward or downward synchronously; the two second power devices are connected to the two ends of the same rope at the same time, and can pull the rope horizontally outward or inward at the same time to achieve the installation of the sealing rubber ring.
2. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1 is characterized in that: The left and right ends of the frame structure are frame beam structures, and the middle forms an installation space for a large-diameter socket pipe rubber ring.
3. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1 is characterized in that: The rope has a set length and strength; it is generally longer than the outer diameter of the rubber ring of the pipe to be installed at the installation location.
4. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1 is characterized in that: A telescopic fixing device may also be provided on the top of the frame structure to fix the sealing rubber ring from the top to prevent the rope from falling off during the installation process.
5. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1, characterized in that: The second power device is installed on a mounting seat, the first power device drives the mounting seat and the second power device to move up and down together, and the mounting seat is slidably connected to the frame structure.
6. The large-diameter socket pipe rubber ring installation tool as claimed in claim 5, characterized in that: The frame structure is provided with a slide rail, and the mounting seat moves along the slide rail.
7. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1, characterized in that: The two second power devices are driven simultaneously by one first power device.
8. The large-diameter socket pipe rubber ring installation tool as claimed in claim 1, characterized in that: The two second power devices are replaced by one second power device, and the one second power device drives the two ends of the rope through a transmission device.
9. The method for installing the large-diameter socket-and-spigot pipe rubber ring installation tool as described in any one of claims 1 to 8, characterized in that ; Place the rubber ring pipe to be installed at a relatively suitable position of the frame structure, and ensure that the groove on the rubber ring to be installed on the pipe is in the same plane as the fixing rope point of the second power device; Fix the two ends of the rope on the second power device respectively, fold the rope in half starting from the center of the rope, and then pass it through the sealing rubber ring. After the sealing rubber ring is inserted to a certain length, place the center of the rope in the groove of the rubber ring installed at the top of the pipe. At this time, the two ends are arranged on both sides of the pipe respectively, and the second power device is controlled to move to the lower end of the pipe. At this time, fix part of the sealing rubber ring into the groove of the rubber ring installed at the bottom of the pipe; adjust the extension length of the second power device, and pull the rope to preliminarily position and tighten the sealing rubber ring; Then control the first power device to drive the two second power devices to move upward gradually and simultaneously, and adjust the extension length of the two second power devices at any time during the upward movement so that the tensioning rope always remains parallel to the ground. During the process, the rubber ring is driven to gradually move into the groove of the pipe through the tensioning force of the rope until the rope rises to the top of the pipe and brings all the rubber rings into the groove of the pipe fixing rubber ring, completing the installation of the rubber ring.
10. The method for installing the large-diameter socket-and-spigot pipe rubber ring installation tool as claimed in any one of claims 1 to 8, characterized in that ; Place the rubber ring pipe to be installed at a relatively suitable position of the frame structure, and ensure that the groove on the rubber ring to be installed on the pipe is in the same plane as the fixing rope point of the second power device; Put the rope into the groove at the end of the pipe from top to bottom, and extend the two ends of the rope to the bottom of the two sides of the groove at the end of the pipe, and then pass the two ends of the rope through the rubber ring, extend to the two sides respectively, and connect to the two second power devices; At this time, fix the rubber ring part into the rubber ring installation groove at the bottom of the pipe; adjust the extension length of the second power device, and pull the rope to preliminarily position and tighten the sealing rubber ring; Then control the first power device to drive the two second power devices to move upward gradually and simultaneously, and adjust the extension length of the two second power devices at any time during the upward movement so that the tensioning rope always remains parallel to the ground. During the process, the rubber ring is driven to gradually move into the groove of the pipe through the tensioning force of the rope until the rope rises to the top of the pipe and brings all the rubber rings into the groove of the pipe fixing rubber ring, completing the installation of the rubber ring.
Citation Information
Patent Citations
Inner rubber ring mounting device and rubber ring mounting machine
CN112757654A
Rubber ring mounting and dismounting device and mounting and dismounting method thereof
CN116852316A
Inner rubber ring mounting device and rubber ring mounting machine
CN214646017U