Temporary plugging device for pipeline

Abstract

The utility model relates to the technical field of pipeline construction, in particular to a pipeline temporary plugging device which comprises a baffle, an elastic plugging block and an expansion head which are sequentially arranged, a main expansion hole is formed in the elastic plugging block, a linkage assembly is arranged between the baffle and the expansion head, and an avoiding hole for the linkage assembly to penetrate through is formed in the top of the elastic plugging block. A through hole is formed in the bottom of the elastic plugging block; the avoiding hole and the through hole are respectively communicated with the main expansion hole; an operator can make the baffle and the expansion head relatively close to each other through the linkage assembly, the expansion head enters the main expansion hole through the through hole in the bottom of the elastic plugging block, after entering, the expansion head can generate outward extrusion force on the inner wall of the main expansion hole, the elastic plugging block elastically expands, the peripheral face of the elastic plugging block tightly abuts against the inner wall of a pipeline, and therefore the pipeline is sealed. An effective sealing structure is formed, so that soil, sand, water and other substances are prevented from entering the pipeline, plugging operation can be rapidly completed, the requirement for temporary plugging amount increase is met, and construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline construction, specifically to a temporary pipeline plug. Background Technology

[0002] In various pipeline engineering constructions, pipeline installation is a crucial and complex task. During pipeline installation, temporarily sealing the open pipe ends at the end of each workday is an essential step. This operation has multiple important implications. First, ensuring the cleanliness of the pipe interior throughout the entire pipeline installation process is a key factor in ensuring project quality. Good pipe cleanliness can significantly reduce the workload of subsequent pipe cleaning procedures, improve construction efficiency, and lower construction costs. Second, preventing hard objects from being left in the pipe is also extremely important. During pipe cleaning, hard objects are very likely to damage the inner wall of the pipe, which will not only affect the service life of the pipeline but may also cause safety hazards and threaten the stable operation of the entire pipeline system.

[0003] Currently, there are various methods for temporarily sealing pipelines, but each of these methods has certain limitations.

[0004] Common sealing methods include using woven bags, wrapping with tape, or using non-woven fabric and tape. These methods are relatively simple to operate and can prevent solid materials such as soil and sand from entering the pipeline to a certain extent. However, their sealing effect is not ideal and cannot completely prevent water from entering the pipeline. Actual investigations have found that water ingress problems caused by improper temporary sealing occur frequently during pipeline construction. In minor cases, water ingress will affect the project progress and require additional time and effort for drainage and drying. In severe cases, it will affect project acceptance and gas supply, causing delays in gas supply and resulting in significant economic losses for the entire project. In other words, although these easy-to-operate sealing devices have certain advantages in terms of ease of operation, their sealing effect cannot meet the requirements of actual projects.

[0005] In addition, blind flange sealing or flange cap sealing is also used. This sealing method can provide a good sealing effect and effectively prevent soil, sand, water and other debris from entering the pipeline. However, its drawbacks are also obvious. First, this sealing method requires a lot of manpower, material resources and time. The sealing operation requires professional welding equipment and technicians. The operation process is complicated and not conducive to continuous construction in the future. Through actual comparison, it can be found that under the condition of ensuring good sealing effect, it takes an average of 21 minutes for one person to complete this type of sealing operation. In some emergency situations, such as sudden pipeline openings that need to be sealed in time, this operation time is obviously too long and cannot meet the requirements of rapid sealing. Second, flange caps also have the problem of incomplete specifications. When faced with pipelines of different specifications, it may not be possible to find a suitable flange cap for sealing, which also limits the application scope of this sealing method.

[0006] In summary, existing methods for temporary pipeline sealing either have poor sealing effects or are complex to operate, time-consuming, and have compatibility issues, failing to meet the growing demand for temporary pipeline sealing.

[0007] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0008] The existing methods for temporary pipeline sealing mentioned above either have poor sealing effects or are complex to operate, time-consuming, and have specification compatibility issues, thus failing to meet the growing demand for temporary pipeline sealing.

[0009] The technical solution adopted by this utility model to solve its technical problem is:

[0010] A temporary pipe plug includes a baffle, an elastic plugging block, and an expansion head arranged sequentially. The elastic plugging block has a main expansion hole, the inner diameter of which is smaller than the outer diameter of the expansion head. A linkage component is provided between the baffle and the expansion head to allow them to move closer or further apart. The top of the elastic plugging block has a clearance hole for the linkage component to pass through, and the bottom of the elastic plugging block has a through hole for the expansion head to enter the main expansion hole. The clearance hole and the through hole are respectively connected to the main expansion hole. When the baffle moves closer to the expansion head through the linkage component, the expansion head can enter the main expansion hole through the through hole to force the inner wall of the main expansion hole, thereby causing the elastic plugging block to expand elastically.

[0011] As described above, in the temporary pipe plug, the main expansion hole is tapered.

[0012] As described above, in the temporary pipe plug, the end of the main expansion hole that communicates with the clearance hole is round, and the end of the main expansion hole that communicates with the through hole is elliptical.

[0013] As described above, in the temporary pipe plug, the inner wall of the main expansion hole is either straight or curved.

[0014] As described above, the temporary pipe plugging device also includes an auxiliary expansion hole between the main expansion hole and the through hole. The inner diameter of the auxiliary expansion hole is larger than that of the main expansion hole and smaller than that of the through hole.

[0015] In the temporary pipe plug described above, the depth of the main expansion hole is greater than the depth of the auxiliary expansion hole or through hole.

[0016] As described above, the temporary pipe plug includes a guide section and an expansion section. The outer diameter of the guide section is smaller than the outer diameter of the expansion section and smaller than the inner diameter of the through hole.

[0017] As described above, the guide section of the temporary pipe plug has an arc-shaped cross-section.

[0018] As described above, the temporary pipe plugging device includes a linkage rod located at the top of the expansion head and a linkage hole located on the baffle plate, wherein the linkage hole and the linkage rod are threadedly connected.

[0019] As described above, the temporary pipe plugging device further includes a mating head located at the free end of the linkage rod.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model relates to the technical field of pipeline construction and includes a temporary pipeline plugging device. It comprises a baffle, an elastic plugging block, and an expansion head arranged sequentially. The elastic plugging block has a main expansion hole. A linkage assembly is provided between the baffle and the expansion head. The top of the elastic plugging block has a clearance hole for the linkage assembly to pass through, and the bottom of the elastic plugging block has a through hole. The clearance hole and the through hole communicate with the main expansion hole. The operator can use the linkage assembly to bring the baffle and the expansion head closer together. The expansion head enters the main expansion hole through the through hole at the bottom of the elastic plugging block. After entering, the expansion head exerts an outward compressive force on the inner wall of the main expansion hole, causing the elastic plugging block to expand elastically. This allows the outer circumference of the elastic plugging block to tightly abut against the inner wall of the pipeline, forming an effective sealing structure. This prevents soil, sand, water, and other substances from entering the pipeline, enabling rapid plugging operations, meeting the requirements of increased temporary plugging volumes, and improving construction efficiency.

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the temporary pipe plug of this utility model;

[0024] Figure 2 This is a front view schematic diagram of the temporary pipe plug of this utility model;

[0025] Figure 3 This is a top view of the temporary pipe plug of this utility model;

[0026] Figure 4 for Figure 3 Cross-sectional view along line AA;

[0027] Figure 5 for Figure 3 Cross-sectional view along line BB;

[0028] Figure 6 This is one of the exploded view diagrams of the temporary pipe plug of this utility model;

[0029] Figure 7 This is the second exploded view of the temporary pipe plug of this utility model. Detailed Implementation

[0030] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0031] like Figures 1 to 7 As shown, the temporary pipe plug of this embodiment includes a baffle 1, an elastic plugging block 2, and an expansion head 3 arranged in sequence. The elastic plugging block 2 is provided with a main expansion hole 21. The inner diameter of the main expansion hole 21 is smaller than the outer diameter of the expansion head 3. A linkage component 4 is provided between the baffle 1 and the expansion head 3 to allow them to move closer or further apart. The top of the elastic plugging block 2 is provided with a clearance hole 22 for the linkage component 4 to pass through. The bottom of the elastic plugging block 2 is provided with a through hole 23 for the expansion head 3 to enter the main expansion hole 21. The clearance hole 22 and the through hole 23 are respectively connected to the main expansion hole 21.

[0032] Specifically, when the temporary pipe plug is not in operation, the baffle, elastic plug and expansion head are set in sequence. The inner diameter of the main expansion hole in the elastic plug is smaller than the outer diameter of the expansion head. At this time, the elastic plug does not expand and its outer diameter is smaller than the inner diameter of the pipe, so it can be smoothly inserted into the pipe.

[0033] The operator can use the linkage component to bring the baffle and the expansion head closer together. As they gradually approach each other, the expansion head enters the main expansion hole through the through hole at the bottom of the elastic sealing block. Since the inner diameter of the main expansion hole is smaller than the outer diameter of the expansion head, the expansion head will exert an outward squeezing force on the inner wall of the main expansion hole after entering. Under the squeezing action of the expansion head, the elastic sealing block undergoes elastic deformation and expands elastically in all directions. This expansion makes the outer circumference of the elastic sealing block tightly abut against the inner wall of the pipe, forming an effective sealing structure, thereby preventing soil, sand, water and other substances from entering the pipe and achieving the sealing of the pipe.

[0034] When it is necessary to release the blockage, the operator uses the linkage component to move the baffle and the expansion head relatively away. The expansion head withdraws from the main expansion hole, the elastic sealing block loses its squeezing effect, and returns to its initial state. Its outer diameter is once again smaller than the inner diameter of the pipe, and the blocker can be removed from the pipe.

[0035] Furthermore, the elastic sealing block expands elastically in all directions and fits tightly against the inner wall of the pipe, forming a good sealing effect. This effectively prevents soil, sand, water, and other debris from entering the pipe, avoiding the problem that some existing sealing methods cannot completely prevent water from entering the pipe, and reducing the impact of water ingress on project progress and gas delivery acceptance.

[0036] Compared to sealing methods such as woven bags and tape, this sealing device has more reliable sealing performance, can better ensure the cleanliness of the pipe, reduce the amount of cleaning work, and prevent hard objects from entering the pipe and damaging the inner wall.

[0037] Compared with blind flange sealing or flange cap sealing, this sealing device does not require complex welding equipment and professional welding technology, nor does it require cumbersome installation and disassembly operations. Operators only need to control the relative position of the baffle and expansion head through the linkage component to complete the sealing and unsealing operations, which greatly saves manpower and time costs. In emergency situations, it can quickly complete the sealing operation, meet the requirements of increased temporary sealing volume, and improve construction efficiency.

[0038] Because the elastic sealing block is elastic, it can expand to a certain extent according to the inner diameter of the pipe of different specifications, or replace the elastic sealing block of different sizes. It can adapt to pipes of different diameters within a certain range, which solves the problem of incomplete specifications of the flange cap and expands the application range of the sealing device.

[0039] Furthermore, after completing a sealing task, the plug can be reused for sealing other pipelines simply by removing the plug, demonstrating excellent reusability and reducing construction costs.

[0040] like Figures 1 to 7 As shown, the main expansion hole 21 in this embodiment is a conical hole.

[0041] Specifically, when the plug is not in operation, the expansion head 3 does not enter the main expansion hole 21. At this time, the elastic plug 2 is in its natural state, and its outer diameter is smaller than the inner diameter of the pipe, which makes it easier to put the plug into the pipe.

[0042] When the baffle 1 and the expansion head 3 are brought closer together by the linkage component 4, the expansion head 3 begins to enter the main expansion hole 21 through the through hole 23. Since the main expansion hole 21 is a conical hole, the contact area between the expansion head 3 and the inner wall of the main expansion hole 21 gradually increases during the process of the expansion head 3 entering, and the squeezing force on the inner wall of the main expansion hole 21 also gradually increases. As the expansion head 3 continues to go deeper, the elastic sealing block 2 is gradually squeezed and expands elastically in all directions until it fits tightly against the inner wall of the pipe, thus achieving sealing.

[0043] When it is necessary to release the blockage, the baffle 1 and the expansion head 3 are moved away from each other by the linkage component 4, and the expansion head 3 is withdrawn from the main expansion hole 21. Due to the loss of the compression of the expansion head 3, the elastic sealing block 2 gradually returns to its initial state, its outer diameter becomes smaller, and it can be removed from the pipe.

[0044] Preferably, the conical main expansion hole 21 allows the expansion head 3 to compress the elastic sealing block 2 gradually when it enters. Compared with the straight cylindrical hole, this design allows the elastic sealing block 2 to expand more evenly in all directions, avoiding damage to the elastic sealing block 2 caused by local stress concentration, and ensuring the stability and reliability of the sealing effect.

[0045] Furthermore, during the expansion process, the elastic sealing block 2 fits more tightly against the inner wall of the pipe, better adapting to the unevenness of the inner wall and improving the sealing performance.

[0046] Furthermore, due to the progressive extrusion, the force required to push the expansion head 3 into the main expansion hole 21 by operating the linkage component 4 is relatively small and stable. The operator does not need to apply a large force at once to expand the elastic sealing block 2 to the appropriate degree, which reduces the difficulty of operation and improves the safety of operation.

[0047] For pipes of different diameters, the tapered main expansion hole 21 allows the expansion head 3 to adapt to different expansion requirements within a certain range. In pipes with smaller diameters, the expansion head 3 can enter the main expansion hole 21 shallowly enough to allow the elastic plugging block 2 to expand to a suitable extent. In pipes with larger diameters, the expansion head 3 can penetrate deeper into the main expansion hole 21, allowing the elastic plugging block 2 to expand even more, thus better adapting to pipes of different diameters and expanding the applicability of the plugging device.

[0048] When installing the plug, the expansion head 3 can more easily enter the tapered main expansion hole 21 because the opening of the tapered hole is relatively large, which plays a certain guiding role. When disassembling, as the contact area between the expansion head 3 and the inner wall of the main expansion hole 21 gradually decreases, the required pull-out force is also relatively small, which facilitates the quick disassembly of the plug.

[0049] like Figures 1 to 7 As shown, in this embodiment, the end of the main expansion hole 21 that communicates with the clearance hole 22 is round, and the end of the main expansion hole 21 that communicates with the through hole 23 is elliptical.

[0050] Specifically, when the expansion head 3 enters the main expansion hole 21 through the through hole 23, since the end of the main expansion hole 21 that communicates with the through hole 23 is elliptical, the expansion head 3 initially contacts an elliptical space. The elliptical shape has a larger dimension in the long axis direction than a circle. This allows the expansion head 3 to exert greater initial pressure on the elastic sealing block 2 in the long axis direction when it enters, causing the elastic sealing block 2 to preferentially deform and expand to a certain extent in this direction.

[0051] As the expansion head 3 continues to penetrate deeper into the main expansion hole 21 and approaches the end that communicates with the avoidance hole 22 (which is circular), the compression range of the expansion head 3 on the elastic sealing block 2 gradually expands and becomes more uniform. The circular space allows the expansion head 3 to exert relatively consistent compression on the elastic sealing block 2 in the circumferential direction, thereby causing the elastic sealing block 2 to expand evenly in all directions until it fits tightly against the inner wall of the pipe, thus achieving the sealing function.

[0052] When the blockage needs to be released, the expansion head 3 exits from the main expansion hole 21. Since the end communicating with the clearance hole 22 is circular, the contact between the expansion head 3 and the elastic sealing block 2 is relatively uniform. The elastic sealing block 2 is subject to relatively consistent constraints in the circumferential direction, which facilitates its uniform contraction.

[0053] When the expansion head 3 approaches the elliptical end that communicates with the through hole 23, the elastic sealing block 2 has relatively small contraction resistance in the long axis direction, and can return to its initial state relatively smoothly, making it convenient to remove the sealing device from the pipe.

[0054] The elliptical to circular design of the main expansion hole 21 enables the elastic sealing block 2 to transition from non-uniform expansion to uniform expansion. First, a large initial compression is performed in a specific direction, which can quickly make the elastic sealing block 2 contact and fit with the inner wall of the pipe in some key parts. Then, uniform circumferential expansion is performed, which ensures that the entire elastic sealing block 2 fits tightly with the inner wall of the pipe, improving the tightness and reliability of the sealing.

[0055] For situations where there may be local unevenness or slight protrusions on the inner wall of some pipes, the initial non-uniform expansion of the elliptical end can better adapt to these irregularities, allowing the elastic sealing block 2 to first fill larger gaps, and then further improve the sealing effect through the uniform expansion of the circular end, thereby enhancing the adaptability of the sealing device to different pipe conditions.

[0056] Preferably, the elliptical opening provides a larger entry space for the expansion head 3 to enter the main expansion hole 21. When the expansion head 3 begins to enter, it reduces the initial contact area and friction with the elastic sealing block 2, reduces the resistance to pushing the expansion head 3 into the main expansion hole 21, making the operation easier. It also reduces wear between the expansion head 3 and the elastic sealing block 2, and extends the service life of the plugger.

[0057] When the expansion head 3 is withdrawn, the elliptical end design makes it easier for the elastic sealing block 2 to contract in the long axis direction, reducing the difficulty of pulling out the expansion head 3 and further reducing wear between components.

[0058] The special shape design of the main expansion hole 21 allows for better coordination with the clearance hole 22 and the through hole 23. The elliptical end connects to the through hole 23, which facilitates the smooth entry of the expansion head 3 into the main expansion hole 21 from below; the circular end connects to the clearance hole 22, which can better coordinate the deformation of each part of the elastic sealing block 2 during the expansion process, making the entire sealing structure work more smoothly.

[0059] like Figures 1 to 7 As shown, the inner wall of the main expansion hole 21 in this embodiment is a straight surface. When the expansion head 3 enters the main expansion hole 21, since the inner wall of the main expansion hole 21 is a straight surface, the contact between the expansion head 3 and the inner wall is gradually advanced along the straight direction. The extrusion force of the expansion head 3 on the elastic sealing block 2 is transmitted relatively evenly in the axial direction, so that the elastic sealing block 2 can expand evenly in all directions along the straight inner wall. This uniform extrusion force transmission makes the deformation degree of each part of the elastic sealing block 2 relatively consistent, thereby achieving overall expansion to fit the inner wall of the pipe.

[0060] When the expansion head 3 exits the main expansion hole 21, the compressive force on the elastic sealing block 2 gradually decreases. Due to the constraint of the straight inner wall, the elastic sealing block 2 can shrink more evenly in the opposite direction to the expansion and return to the initial state.

[0061] The inner wall of a straight surface is relatively easy to process during manufacturing, and the production process is relatively simple, which can reduce production costs and improve production efficiency. For large-scale production, this simple structural design is more conducive to ensuring the stability of product quality.

[0062] Furthermore, the straight surface ensures that the elastic sealing block 2 is subjected to uniform force during expansion and contraction, which reduces local stress concentration. This helps to improve the service life of the elastic sealing block 2 and avoid damage caused by excessive local deformation. At the same time, uniform expansion and contraction can also ensure the stability of the sealing effect, so that the sealing device can still maintain good sealing performance after multiple uses.

[0063] Furthermore, when the expansion head 3 moves in the main expansion hole 21 on the straight inner wall, its movement trajectory is relatively regular and the friction is relatively small, which makes the operation smoother, reduces the requirements on the expansion head 3 drive device, and reduces energy loss.

[0064] In other embodiments, the inner wall of the main expansion hole 21 is curved. When the expansion head 3 enters, the inner wall of the curved surface will generate different directions and magnitudes of reaction force on the expansion head 3 according to the shape of the curve. For example, when the curved surface is an inwardly concave curve, it will generate a large lateral extrusion force on the elastic sealing block 2 in the initial stage of the expansion head 3, causing the elastic sealing block 2 to expand to both sides more quickly. As the expansion head 3 continues to go deeper, the change of the curved surface will guide the elastic sealing block 2 to undergo more complex deformation, so that it can better adapt to the shape of the inner wall of the pipe.

[0065] When the expansion head 3 is withdrawn, the curved surface guides the elastic sealing block 2 to contract in a specific way. The shape of the curved surface can help the elastic sealing block 2 to return to its initial state in an orderly manner, avoiding the situation of poor local contraction.

[0066] The curved surface design allows the elastic sealing block 2 to better adapt to the inner walls of pipes with different shapes. For some pipes with a certain curvature or irregular shape of inner wall, the curved surface can guide the elastic sealing block 2 to deform in a targeted manner, thereby achieving a tighter fit and improving the sealing effect.

[0067] By rationally designing the shape of the curved surface, the distribution of the compressive force of the expansion head 3 on the elastic sealing block 2 can be optimized. In some critical parts, such as pipe joints or areas prone to leakage, the curved surface can generate greater expansion force for the elastic sealing block 2, thereby enhancing the sealing performance.

[0068] The curved surface can play a certain buffering role during expansion and contraction. When the expansion head 3 enters or exits, the curved surface can gradually change the stress condition of the elastic sealing block 2, reduce the impact force, and reduce the risk of damage to the elastic sealing block 2 and the expansion head 3.

[0069] like Figures 1 to 7As shown, in this embodiment, an auxiliary expansion hole 24 is also provided between the main expansion hole 21 and the through hole 23. The inner diameter of the auxiliary expansion hole 24 is larger than the inner diameter of the main expansion hole 21 and smaller than the inner diameter of the through hole 23. The expansion head 3 enters the elastic sealing block 2 through the through hole 23, first through the auxiliary expansion hole 24, and then enters the main expansion hole 21.

[0070] When the expansion head 3 enters the elastic sealing block 2 through the through hole 23, it will first reach the auxiliary expansion hole 24. Since the inner diameter of the auxiliary expansion hole 24 is larger than that of the main expansion hole 21 and smaller than that of the through hole 23, the elastic sealing block 2 will begin to expand to a certain extent when the expansion head 3 enters the auxiliary expansion hole 24. This is because the gap between the outer diameter of the expansion head 3 and the inner diameter of the auxiliary expansion hole 24 is relatively small. The expansion head 3 applies a certain radial pressure to the elastic sealing block 2, causing the elastic sealing block 2 to begin to expand outward.

[0071] Next, the expansion head 3 enters the main expansion hole 21. The main expansion hole 21 has a smaller inner diameter. The expansion head 3 further squeezes the elastic sealing block 2, causing it to continue to expand and reach the final sealing state. During this process, the initial expansion of the auxiliary expansion hole 24 plays a transitional role, allowing the elastic sealing block 2 to adapt more smoothly to the change from the larger inner diameter through hole 23 to the smaller inner diameter main expansion hole 21.

[0072] When the expansion head 3 retracts, it first exits from the main expansion hole 21 to the auxiliary expansion hole 24. Due to the larger inner diameter of the auxiliary expansion hole 24, the constraint on the elastic sealing block 2 is reduced, and it begins to contract to a certain extent. Then, the expansion head 3 retracts from the auxiliary expansion hole 24 to the through hole 23, and the elastic sealing block 2 contracts further until it returns to its initial state. This sequence makes the contraction process of the elastic sealing block 2 relatively smooth.

[0073] The auxiliary expansion hole 24 allows the expansion process of the elastic sealing block 2 to be divided into two stages: first, it expands initially in the auxiliary expansion hole 24, and then it expands further in the main expansion hole 21. This avoids the uneven expansion caused by the sudden increase in expansion amplitude when the elastic sealing block 2 expands directly from the through hole 23 to the main expansion hole 21. Uniform expansion allows the elastic sealing block 2 to better fit the inner wall of the pipe, improving the sealing performance and reliability of the plug.

[0074] Through gradual expansion, the elastic sealing block 2 can better adapt to changes in the shape and size of the pipeline. Especially for some pipelines with irregular inner walls, the transition effect of the auxiliary expansion hole 24 can make the elastic sealing block 2 fit more tightly against the inner wall of the pipeline, reducing the possibility of leakage.

[0075] Without the auxiliary expansion hole 24, the expansion head 3 would directly enter the main expansion hole 21 from the through hole 23, and the elastic sealing block 2 would be subjected to a large stress impact, which could easily lead to local stress concentration, thereby causing damage or deformation to the elastic sealing block 2. The presence of the auxiliary expansion hole 24 makes the expansion process smoother, reduces stress concentration, and extends the service life of the elastic sealing block 2.

[0076] During expansion and contraction, a smooth transition can reduce friction and wear between the elastic sealing block 2 and the expansion head 3 as well as the inner wall of the pipe. This is because during the auxiliary expansion hole 24 stage, the deformation of the elastic sealing block 2 is relatively small, and the contact with surrounding components is gentler, reducing the risk of wear caused by severe friction.

[0077] like Figures 1 to 7 As shown, the depth of the main expansion hole 21 in this embodiment is greater than the depth of the auxiliary expansion hole 24 or the through hole 23.

[0078] When the expansion head 3 passes through the through hole 23 and the auxiliary expansion hole 24 and enters the main expansion hole 21, due to the large depth of the main expansion hole 21, the expansion head 3 will have a long stroke in the main expansion hole 21 to apply radial pressure to the elastic sealing block 2. As the expansion head 3 gradually penetrates into the main expansion hole 21, the elastic sealing block 2 starts from the end near the auxiliary expansion hole 24 and gradually expands along the depth direction of the main expansion hole 21. This gradual expansion process allows the elastic sealing block 2 to expand outward evenly over a large range, thereby making better contact with the surrounding structure (such as the inner wall of the pipe).

[0079] When the expansion head 3 withdraws from the main expansion hole 21, it gradually withdraws from the depth of the main expansion hole 21. As the expansion head 3 withdraws, the radial pressure on the elastic sealing block 2 gradually decreases, thereby gradually contracting along the depth direction of the main expansion hole 21. Because the main expansion hole 21 is deep, the contraction process is relatively slow and smooth, avoiding the situation where the elastic sealing block 2 will contract violently or deform due to sudden loss of restraint.

[0080] Preferably, the main expansion hole 21 has a large depth, which allows the elastic sealing block 2 to contact the surrounding structure over a larger axial length when it expands. Taking pipe sealing as an example, a larger contact area can increase the reliability of the seal.

[0081] The longer main expansion hole 21 allows the pressure of the expansion head 3 on the elastic sealing block 2 to be evenly distributed over a larger range. This helps the elastic sealing block 2 to expand evenly as a whole, avoiding situations where the local pressure is too high or too low. The uniform pressure distribution can ensure that the elastic sealing block 2 fits more tightly with the surrounding structure, further improving the sealing effect.

[0082] Because the main expansion hole 21 is deep, the expansion and contraction process is relatively slow and smooth. The stress change experienced by the elastic sealing block 2 during this process is relatively mild, which helps to reduce the risk of excessive deformation or damage to the elastic sealing block 2 and extend its service life.

[0083] When the elastic sealing block 2 expands, the greater depth can provide better support and constraint, making the elastic sealing block 2 more stably fixed in the corresponding position.

[0084] Preferably, a larger main expansion hole 21 depth can provide a certain amount of space for expansion heads 3 of different sizes. In practical applications, it may be necessary to select expansion heads 3 of different sizes according to specific working conditions and requirements. A large main expansion hole 21 depth can ensure that expansion heads 3 of different sizes can work normally in it, thus improving the versatility and flexibility of the sealing system.

[0085] like Figures 1 to 7 As shown, the expansion head 3 in this embodiment includes a guide section 31 and an expansion section 32. The outer diameter of the guide section 31 is smaller than the outer diameter of the expansion section 32 and smaller than the inner diameter of the through hole 23.

[0086] When the expansion head 3 begins to be inserted into the through hole 23 of the elastic sealing block 2, the guide section 31 enters first. Since the outer diameter of the guide section 31 is smaller than the inner diameter of the through hole 23, it can easily pass through the through hole 23, thus guiding the expansion head 3 to enter accurately. In this process, the guide section 31 provides the correct path and direction for the subsequent expansion section 32 to enter, ensuring that the expansion head 3 can smoothly enter the interior of the elastic sealing block 2 along the through hole 23.

[0087] After the guide section 31 completely passes through the through hole 23 and enters the internal space such as the main expansion hole 21, the expansion section 32 begins to enter the through hole 23. Since the outer diameter of the expansion section 32 is larger than that of the guide section 31, it will generate radial pressure on the through hole 23 and the surrounding elastic sealing block 2. This pressure will cause the elastic sealing block 2 to undergo elastic deformation and expand outward, thereby achieving the functions of sealing or fixing the surrounding structure (such as the inner wall of the pipe).

[0088] When the blockage needs to be released, the expansion head 3 is pulled out in the reverse direction. The expansion section 32 first exits from the elastic sealing block 2. As the expansion section 32 exits, the radial pressure on the elastic sealing block 2 gradually decreases and begins to shrink and return to its original shape. Finally, the guide section 31 is pulled out from the through hole 23. Due to its small outer diameter, the pulling process is relatively smooth and will not cause excessive pulling or damage to the elastic sealing block 2.

[0089] The smaller outer diameter of the guide section 31 allows the expansion head 3 to be easily aligned and inserted into the through hole 23 without requiring much effort to align precisely.

[0090] Furthermore, during the insertion process, the gap between the guide section 31 and the through hole 23 is relatively large, which reduces the friction and wear between the two. This not only extends the service life of the expansion head 3 and the elastic sealing block 2, but also ensures the smoothness of each insertion operation and avoids problems such as difficulty in insertion or decreased sealing performance caused by wear.

[0091] Furthermore, the larger outer diameter of the expansion section 32 can provide sufficient radial pressure after entering the elastic sealing block 2, so that the elastic sealing block 2 expands outward evenly. This uniform expansion can ensure that the elastic sealing block 2 is in full contact with the surrounding structure, forming a good sealing or fixing effect.

[0092] Because the expansion section 32 allows the elastic sealing block 2 to expand fully, it increases the contact area and contact pressure between the elastic sealing block 2 and the surrounding structure, thereby significantly improving the sealing performance.

[0093] like Figures 1 to 7 As shown, the cross-sectional shape of the guide segment 31 in this embodiment is arc-shaped.

[0094] When the expansion head 3 is inserted into the through hole 23 of the elastic sealing block 2, the guide section 31 first contacts the entrance of the through hole 23. Since the cross-section of the guide section 31 is arc-shaped, its smooth surface can form a smooth transition with the entrance of the through hole 23. Under the action of the insertion force, the arc-shaped surface will guide the expansion head 3 to naturally enter the through hole 23. This is because the arc-shaped surface will decompose the insertion force into the pushing force along the axis of the through hole and the corrective force that makes the expansion head automatically align with the center of the through hole, so that the expansion head 3 can enter the accurate position more smoothly.

[0095] As the guide section 31 enters the through hole 23, the contact between the arc-shaped cross-section and the inner wall of the through hole 23 gradually increases, rather than suddenly making large-area contact as with some sharp-edged shapes. This gradual contact method makes the frictional resistance experienced by the expansion head 3 more evenly distributed and the resistance value relatively small during its advancement. As the guide section 31 continues to penetrate deeper, its arc-shaped surface continuously and gently compresses and guides the surrounding elastic material (elastic sealing block 2), causing the elastic material to gradually deform, preparing for the subsequent entry of the expansion section 32.

[0096] Preferably, the arc-shaped guide section 31 has an automatic centering function. When it approaches the through hole 23, even if there is a certain deviation in the initial position, the arc-shaped surface can automatically adjust the position of the expansion head 3 by force when it comes into contact with the edge of the through hole 23, so that its center gradually aligns with the center of the through hole 23, which greatly improves the success rate and efficiency of insertion.

[0097] Furthermore, the smooth, curved surface reduces the jamming and stuck phenomena during insertion. Compared with shapes with sharp edges and corners, the curved guide section 31 can slide more easily when encountering small obstacles or uneven surfaces in the through hole 23, reducing the difficulty of operation for operators and improving work efficiency.

[0098] The arc-shaped guide section 31 exerts a relatively gentle pressure on the elastic sealing block 2 during insertion, avoiding damage such as cuts and tears caused by sharp edges to the elastic material. This helps maintain the integrity and elasticity of the elastic sealing block 2 and extends its service life.

[0099] like Figures 1 to 7 As shown, the expansion section 32 in this embodiment is cylindrical.

[0100] Specifically, after the guide section 31 of the expansion head 3 guides it smoothly into the through hole 23 of the elastic sealing block 2, the expansion section 32 follows. Since the expansion section 32 is cylindrical and its outer surface is evenly distributed in the circumferential direction, when pressure is applied to the elastic sealing block 2 to make it expand, the cylindrical expansion section 32 can uniformly squeeze the elastic material of the inner wall of the through hole 23. This uniform squeezing makes the deformation degree of the elastic sealing block 2 in the circumferential direction basically consistent, so that the elastic sealing block 2 can expand outward evenly and fully contact the surrounding sealing surface.

[0101] When an axial force is applied to the expansion section 32, it will evenly transmit the force to the inner wall of the elastic sealing block 2, forming a stable and continuous sealing pressure. This stable pressure distribution helps to ensure the sealing effect between the elastic sealing block 2 and the sealing surface, preventing media leakage. Moreover, due to the symmetry of the cylindrical structure, the sealing performance in different directions is relatively consistent, which can effectively cope with the pressure and external force in various directions, so that the cylindrical expansion section 32 forms a stable support structure in the elastic sealing block 2.

[0102] Preferably, the cylindrical geometry has good symmetry, and when subjected to external forces, the force is uniform in each part. This makes the expansion section 32 less prone to deformation or damage during operation, thus ensuring the stability of the entire sealing structure.

[0103] The cylindrical shape makes it easier to position and install the expansion section 32 when it is inserted into the through hole 23 of the elastic sealing block 2. The operator can more intuitively align the expansion section 32 with the through hole. In addition, the cylindrical structure fits more smoothly with the inner wall of the through hole during the insertion process, reducing the difficulties and errors in the installation process.

[0104] like Figures 1 to 7As shown, the linkage component 4 in this embodiment includes a linkage rod 41 disposed on the top of the expansion head 3 and a linkage hole 42 disposed on the baffle 1. The linkage hole 42 and the linkage rod 41 are connected by a thread.

[0105] Specifically, the linkage rod 41 and the linkage hole 42 in the linkage assembly 4 are connected by a thread, which utilizes the working principle of thread transmission. When the user rotates the baffle 1, the linkage hole 42 will rotate with the baffle 1. Since the linkage rod 41 is fixed on the top of the expansion head 3 and is threadedly engaged with the linkage hole 42, according to the characteristics of thread transmission, the rotating linkage hole 42 will convert the circular motion into the linear motion of the linkage rod 41. Specifically, when the linkage hole 42 rotates clockwise or counterclockwise, the linkage rod 41 will move linearly along the helical direction of the thread, thereby causing the baffle 1 and the expansion head 3 to move closer or further apart. In this embodiment, the user can make the baffle 1 and the expansion head 3 move closer together by rotating the baffle 1, thereby realizing the compression and expansion of the elastic sealing block 2.

[0106] The force applied by rotating baffle 1 is transmitted and converted through the threaded connection between linkage hole 42 and linkage rod 41. The circumferential torque applied by the user to baffle 1 is converted into an axial force acting on linkage rod 41 through the threaded pair. This axial force pushes expansion head 3 to move towards elastic sealing block 2, so that the expansion section 32 of expansion head 3 enters the through hole 23 of elastic sealing block 2, and exerts a squeezing effect on elastic sealing block 2, causing it to elastically deform and expand outward, thereby achieving the sealing function.

[0107] Users can move the baffle 1 and the expansion head 3 relative to each other by rotating the baffle 1. The operation is simple and intuitive, and does not require complicated tools or additional power equipment. This operation method reduces the professional skills required of the operator, and even ordinary users can easily master it.

[0108] The threaded connection has good self-locking properties and a precise transmission ratio. Users can precisely control the movement distance of the expansion head 3 by controlling the angle and number of turns of the rotating baffle 1, thereby achieving precise adjustment of the compression degree of the elastic sealing block 2. This helps to adjust the sealing force according to different sealing requirements and working conditions, ensuring the reliability of the sealing effect.

[0109] By using threaded transmission to bring the baffle 1 and the expansion head 3 closer together, a stable and continuous squeezing force can be provided to the elastic sealing block 2. This stable squeezing can ensure that the elastic sealing block 2 expands evenly and makes full contact with the sealing surface to form a reliable seal.

[0110] Due to the reversibility of the threaded connection, the user can rotate the baffle 1 in the opposite direction to move the baffle 1 and the expansion head 3 away from each other, thereby relieving the compression on the elastic sealing block 2. When resealing is required, the baffle 1 can be rotated again to restore the sealing function. This reusable feature improves the service life and economy of the sealing device.

[0111] Furthermore, the linkage component 4 employs a threaded connection, resulting in a relatively simple structure that eliminates the need for additional large transmission mechanisms or complex connecting parts. This compact design makes the entire sealing device smaller in size and space-saving. Due to its compact structure, the linkage component 4 can be easily integrated with other components to form a complete sealing system. This helps improve the overall performance and reliability of the equipment, while also facilitating installation, maintenance, and repair.

[0112] like Figures 1 to 7 As shown, the linkage component 4 in this embodiment also includes a mating head 43 located at the free end of the linkage rod 41, which can be operated with tools such as wrenches.

[0113] Preferably, when it is necessary to operate the linkage component 4 to move the baffle 1 and the expansion head 3 closer or further apart, since the linkage rod 41 is provided with a mating head 43 at its free end, and the mating head 43 can be mated with tools such as wrenches, the user can put a suitable wrench or other tool on the mating head 43 and apply external force to the tool (such as turning the wrench) to transmit the external force to the mating head 43, thereby driving the linkage rod 41 to rotate. Since the linkage rod 41 and the linkage hole 42 are threadedly connected, the rotation of the linkage rod 41 will be converted into linear motion of the linkage rod 41 along the axial direction according to the principle of thread transmission, thereby causing the expansion head 3 to move relative to the baffle 1, realizing the squeezing or loosening action of the elastic sealing block 2.

[0114] Tools such as wrenches can utilize the lever principle to increase the torque applied to the mating head 43 during operation. Compared to directly turning the linkage rod 41 or the baffle 1 by hand, using tools can produce a greater rotational effect with less force. Especially when a greater force is needed to squeeze the elastic sealing block 2 to achieve a good seal, it can significantly reduce the labor intensity of the operator and improve the operating efficiency.

[0115] Furthermore, tools such as wrenches can more precisely control the angle and number of rotations. In some applications where a high degree of sealing is required, precise rotation control helps to accurately adjust the movement distance of the expansion head 3, thereby precisely controlling the expansion degree of the elastic sealing block 2, ensuring that the ideal sealing effect is achieved, and avoiding the impact on sealing performance due to excessive or insufficient compression.

[0116] Preferably, the mating heads 43 of different specifications and shapes can be adapted to various types of wrenches and other tools. In this way, operators can select the appropriate tools according to the actual situation in different working scenarios and conditions. Moreover, even in some locations with limited space or inconvenient operation, the operation of the linkage component 4 can be completed by selecting appropriate tools (such as bent wrenches), which enhances the practicality of the entire device in different environments.

[0117] Directly operating by hand may damage the linkage rod 41 due to uneven force or friction. However, by using the head 43 and tools, direct contact between the hand and the linkage rod 41 can be avoided, reducing wear and damage to the linkage rod 41, extending the service life of the linkage assembly 4, and ensuring the reliability and stability of the device.

[0118] like Figures 1 to 7 As shown, the elastic sealing block 2 in this embodiment is cylindrical. Because the cylindrical structure has uniform symmetry, when subjected to axial compression, the elastic sealing block can expand relatively evenly in all directions, thereby tightly fitting the hole or inner wall of the pipe that needs to be sealed, and achieving the function of sealing.

[0119] When a cylindrical elastic sealing block expands, its circumferential surface can make uniform contact with the hole or the inner wall of the pipe. Compared with other irregular shapes, it can avoid the situation of local incomplete sealing, forming a continuous and complete sealing interface, effectively preventing the leakage of gas, liquid and other media, thus providing a good sealing effect.

[0120] The cylindrical structure has good symmetry, and the stress distribution inside is relatively uniform when subjected to axial compression. This means that the pressure on each part of the elastic sealing block is more consistent, and it is not easy for local stress concentration to occur. Therefore, the elastic sealing block is more stable during deformation and is not easily damaged by excessive local stress, thus extending its service life. In addition, the uniform stress distribution also allows the elastic sealing block to expand more regularly in all directions when it expands, ensuring the consistency and stability of the sealing effect.

[0121] Cylindrical elastic sealing blocks are widely applicable to various circular sealing scenarios. Whether in water supply and drainage systems, ventilation systems, gas systems, or other industrial pipelines, this shape of elastic sealing block can be used, demonstrating strong versatility and adaptability.

[0122] like Figures 1 to 7 As shown, in this embodiment, the outer diameter of the baffle 1 is larger than the outer diameter of the elastic sealing block 2.

[0123] When the linkage component 4 drives the expansion head 3 to approach the baffle 1 and compress the elastic sealing block 2, the baffle 1 provides a stable support surface for the elastic sealing block 2 because its outer diameter is larger than that of the elastic sealing block 2. Under axial pressure, the elastic sealing block 2 expands outwards, and the larger outer diameter of the baffle 1 limits its excessive expansion, concentrating the expansion of the elastic sealing block 2 primarily in the area requiring sealing, such as inside pipes or holes, thus achieving a better sealing effect. Simultaneously, the baffle 1 also evenly transmits the pressure from the linkage component 4 to the elastic sealing block 2, ensuring relatively uniform force distribution across all parts of the elastic sealing block 2.

[0124] Furthermore, the larger outer diameter of baffle 1 provides a larger support area, making the entire sealing device more stable during operation. When pressure is applied through the linkage component 4, baffle 1 is less likely to shake or shift, ensuring the accuracy and safety of the operation.

[0125] like Figures 1 to 7 As shown, the baffle 1 in this embodiment is disc-shaped. A disc is a very stable geometric shape with high structural strength and stability. During the sealing process, the disc-shaped baffle 1 can withstand the pressure from the linkage component 4 and the elastic sealing block 2 without easily deforming. This ensures the reliability of the entire sealing device during operation and avoids affecting the sealing effect due to baffle deformation.

[0126] The disc-shaped baffle 1 is relatively simple to manufacture and easy to process and form. It can be efficiently produced using common machining methods such as turning and stamping.

[0127] In terms of installation, the disc shape has good versatility and interchangeability, and it can be easily installed with other components (such as elastic sealing block 2, expansion head 3, etc.), reducing installation difficulty and cost.

[0128] For most circular pipes or holes requiring sealing, the disc-shaped baffle 1 has a natural fit. Its circular shape can align and fit well with the inner wall of the pipe or hole, allowing the elastic sealing block 2 to better fill the sealing gap when it expands, thus improving the applicability of the device under different operating conditions.

[0129] Preferably, in other embodiments, the main expansion hole 21 may also adopt a structure such as a conical hole or a straight cylindrical hole.

[0130] Preferably, when the expansion head 3 enters the main expansion hole 21 (conical hole type), since the diameter of the conical hole gradually changes, as the expansion head 3 moves from the end with the smaller diameter to the end with the larger diameter, it will gradually squeeze the inner wall of the elastic sealing block 2. As the expansion head 3 continues to go deeper, the squeezing force on the elastic sealing block 2 gradually increases, thereby causing it to expand uniformly outward along the radial direction, thus achieving the sealing of the sealing area (such as a pipeline).

[0131] The conical hole design allows the expansion of the elastic sealing block 2 to be gradual. When the expansion head 3 first enters, the extrusion pressure is small, and the elastic sealing block 2 expands slightly. As it goes deeper, the extrusion pressure increases, and the degree of expansion also increases accordingly. This gradual expansion method can better adapt to different sealing requirements and sealing environments, and avoid damage to the elastic sealing block 2 or poor sealing effect due to excessive instantaneous extrusion pressure.

[0132] The conical hole has a certain self-centering effect on the expansion head 3. When the expansion head 3 enters the conical hole, it will automatically adjust its position so that its axis coincides with the axis of the conical hole as much as possible, thereby ensuring that the elastic sealing block 2 can expand evenly and improve the reliability of the seal.

[0133] Preferably, when the expansion head 3 enters the main expansion hole 21 (straight cylinder hole type), the expansion head 3 contacts the inner wall of the straight cylinder hole and applies uniform radial pressure to the elastic sealing block 2. Since the diameter of the straight cylinder hole remains constant along its entire length, the elastic sealing block 2 will expand uniformly in the entire circumferential direction after being subjected to pressure, thereby achieving the sealing of the sealing area.

[0134] The machining of straight cylindrical holes is relatively easy, with low machining costs and high production efficiency.

[0135] The straight cylindrical hole has relatively low requirements for the size and shape of the expansion head 3. As long as the outer diameter of the expansion head 3 can match the inner diameter of the straight cylindrical hole, a good sealing effect can be achieved. This makes the main expansion hole 21 of the straight cylindrical hole type have good versatility under expansion heads 3 of different specifications.

[0136] You can choose the appropriate design based on your actual needs.

[0137] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A temporary pipe plug, characterized in that: The device comprises a baffle (1), an elastic sealing block (2) and an expansion head (3) arranged in sequence, the elastic sealing block (2) is internally provided with a main expansion hole (21), the inner diameter of the main expansion hole (21) is smaller than the outer diameter of the expansion head (3), a linkage assembly (4) capable of relatively approaching or moving away the baffle (1) and the expansion head (3) is arranged between the baffle (1) and the expansion head (3), the top of the elastic sealing block (2) is provided with an avoiding hole (22) for the linkage assembly (4) to pass through, the bottom of the elastic sealing block (2) is provided with a through hole (23) for the expansion head (3) to enter the main expansion hole (21), the avoiding hole (22) and the through hole (23) are communicated with the main expansion hole (21) respectively, when the baffle (1) is relatively approached to the expansion head (3) through the linkage assembly (4), the expansion head (3) can enter the main expansion hole (21) through the through hole (23) to force the inner wall of the main expansion hole (21) to make the elastic sealing block (2) expand elastically.

2. The temporary pipe plug of claim 1, wherein: The main expansion hole (21) is in the shape of a tapered hole.

3. The temporary pipe plug of claim 2, wherein: The end of the main expansion hole (21) communicated with the avoiding hole (22) is in the shape of a circle, and the end of the main expansion hole (21) communicated with the through hole (23) is in the shape of an ellipse.

4. The temporary pipe plug of claim 2, wherein: The inner wall of the main expansion hole (21) is in the shape of a straight surface or a curved surface.

5. The temporary pipe plug of claim 1, wherein: An auxiliary expansion hole (24) is further arranged between the main expansion hole (21) and the through hole (23), the inner diameter of the auxiliary expansion hole (24) is larger than the inner diameter of the main expansion hole (21) and smaller than the inner diameter of the through hole (23).

6. The temporary pipe plug of claim 5, wherein: The depth of the main expansion hole (21) is larger than the depth of the auxiliary expansion hole (24) or the through hole (23).

7. A temporary pipe plug according to any one of claims 1 to 6, wherein: The expansion head (3) comprises a guide section (31) and an expansion section (32), the outer diameter of the guide section (31) is smaller than the outer diameter of the expansion section (32) and the inner diameter of the through hole (23).

8. The temporary pipe plug of claim 7, wherein: The cross-sectional shape of the guide section (31) is in the shape of an arc.

9. The temporary pipe plug of claim 1, wherein: The linkage assembly (4) comprises a linkage rod (41) arranged at the top of the expansion head (3) and a linkage hole (42) arranged on the baffle (1), the linkage hole (42) and the linkage rod (41) are threadedly connected.

10. The temporary pipe plug of claim 9, wherein: The linkage assembly (4) further comprises a matching head (43) arranged at the free end of the linkage rod (41).

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