Seismic-resistant pipeline sealing device

Abstract

The present invention relates to the technical field of pipeline plugging, and in particular to an anti-seismic pipeline plugging device, comprising a screw and a seal, and also comprising an inner frame and an outer frame, with a push piece sleeved on the screw, the inner frame and the outer frame being respectively arranged on the inner and outer sides of the push piece, a cavity for accommodating the push piece being formed between the outer frame and the inner frame, and the width of one end of the cavity being greater than the width of the other end, and the push piece pushing the outer frame outward and the inner frame inward when moving within the cavity, the seal being respectively arranged on the outer side of the outer frame and the inner side of the inner frame. The anti-seismic pipeline plugging device obtained by the present invention adopts an inner frame and an outer frame to support the seal, so as to improve the pressure-bearing and anti-seismic capabilities of the seal during use, thereby achieving better sealing performance and a longer service life.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline plugging, in particular to an anti-seismic pipeline plugging device. Background Art

[0002] In the prior art, there is inevitably a gap between cable wells or between cables and pipes at cable outlets, which causes water leakage, silt leakage, or the entry and exit of small animals, posing a safety hazard to cable operation, so the gap needs to be sealed.

[0003] There are generally two ways to seal this gap in the industry. One is to fill it with cement, clay or other curing agents; the other is to use a pipe plugger to seal it.

[0004] The sealing is carried out in the form of filling, which cannot be opened again later. In addition, during actual use, the cables and the like will vibrate to a certain extent, so gaps will appear in the sealing, causing water leakage, and its waterproof performance is poor.

[0005] Instead, a pipe plug is used for sealing. In actual use, the existing pipe plugs will experience fatigue and cause a decrease in sealing performance. For example, Chinese utility model patent: CN202111431185.8, a cable pipe plug, uses two sealing covers to squeeze the rubber part, and the outer wall and inner wall of the rubber part are deformed outward and inward respectively to achieve sealing between the cable and the cable pipe. However, during long-term use, the deformation of the rubber part will fatigue, resulting in a decrease in the sealing effect. In particular, the cable is heavy and the cable itself will have a certain degree of jitter, which will seriously affect the service life and waterproof sealing performance of the pipe plug. Summary of the Invention

[0006] In order to solve the above technical deficiencies, the present invention provides a seismic-resistant pipeline sealing device, which maintains good sealing and waterproof performance during long-term use and can effectively reduce the impact of internal vibration on its sealing performance.

[0007] The present invention discloses an anti-seismic pipe sealing device, comprising a screw and a sealing member, and also comprising an inner frame and an outer frame, a pushing piece being sleeved on the screw, and the pushing piece being connected to the screw by a thread, the number of the inner frame and the outer frame being at least 2 respectively, the outer frame forming a ring structure after splicing, and the inner frame forming a ring structure after splicing; the inner frame and the outer frame are respectively arranged on the inner and outer sides of the pushing piece, and a cavity for accommodating the pushing piece is formed between the outer frame and the inner frame, each pushing piece corresponds to a cavity, and the width of one end of each cavity is greater than the width of the other end, the pushing piece is displaced in the cavity under the action of the screw, thereby pushing the outer frame outward and the inner frame inward, thereby generating deformation, the sealing member is respectively arranged on the outer side of the outer frame and the inner side of the inner frame; the anti-seismic pipe sealing device has an opening and closing structure.

[0008] The opening and closing structure shown can be divided into two situations. In one situation, the seismic pipe sealing device is opened and closed by rotating one of the screws or shafts as the rotating axis; in the other situation, the seismic pipe sealing device is divided into at least two independent parts, which can be spliced ​​and disassembled.

[0009] The width of one end of the cavity is greater than the width of the other end, which means that the width of the cavity in the axial direction is greater at one end than at the other end.

[0010] The number of push pieces is at least 2, and the outer frame, inner frame, push piece and seal can rotate around one of the screws to realize the opening and closing of the pipeline sealing device, so that cables and the like can be placed inside the pipeline sealing device.

[0011] The number of screws is at least two, and the push piece is in a semi-circular ring structure. If there are two screws, a connecting shaft is also required, which connects the push piece, the inner frame, and the outer frame, and enables the inner frame, the outer frame, and the push piece to rotate about the connecting shaft, so that the pipeline plugging device can be opened to allow the insertion of a cable, etc. Preferably, there are at least three screws, one of which serves as the connecting shaft, enabling the push piece, the inner frame, and the outer frame to rotate about the screw, and the screw cooperates with the other screws to better drive the push piece to move axially on the screw.

[0012] As an optimization, a number of hollow structures are evenly spaced on the same circumference of the inner skeleton, and the inner skeleton between adjacent hollow structures is bent outward to form a bending portion. A number of hollow structures are evenly spaced on the same circumference of the outer skeleton, and the outer skeleton between adjacent hollow structures is bent inward to form a bending portion. The bending portion of the outer skeleton fits in the hollow structure of the inner skeleton, and the bending portion of the inner skeleton fits in the hollow structure of the outer skeleton. A cross is formed between the inner skeleton and the outer skeleton, and the outer skeleton and the bending portion on the inner skeleton cooperate to form a cavity for accommodating the push piece.

[0013] As an optimization, a sealing protrusion is provided on the sealing member at the position where the width of the cavity accommodating the push piece is the largest, and the sealing protrusion is an annular structure.

[0014] As an optimization, the seal is annular in structure, one part of the seal is broken along the axial direction, one end of the seal forms a concave cavity inward, the screw, inner skeleton, outer skeleton and the connector at at least one end are inserted into the concave cavity, and the seal covers the inner skeleton and the outer skeleton.

[0015] As an optimization, the two side walls at the disconnection point of the seal both have a corrugated structure, and the corrugated structures of the two side walls cooperate with each other.

[0016] As an optimization, one end of the sealing protrusion at the broken part of the seal is indented into the side wall of the broken part, and the other end protrudes from the side wall of the broken part. When the broken part of the seal is docked, the two ends of the sealing protrusion are docked at the side of the broken part.

[0017] As an optimization, a push piece is set at one or more axial positions of the screw, and the push piece at the same axial position forms a ring. The push pieces are all connected to the screw through threads, and bending parts are provided on the inner frame and the outer frame corresponding to the push piece, and a cavity for accommodating the push piece is formed, and a sealing protrusion is provided on the seal at the position with the maximum width of the cavity for accommodating the push piece.

[0018] As an optimization, two connectors are provided on the screw at the open end of the concave cavity of the seal, wherein the connectors are in a semi-annular structure, and the two connectors form an annular structure.

[0019] As an optimization, raised points are arranged at intervals on the inner and outer sides of the pushing piece, and the pushing piece contacts the inner frame and the outer frame through the raised points to reduce the contact area between the pushing piece and the inner frame and the outer frame, thereby reducing the friction between the pushing piece and the inner frame and the outer frame, so that the rotation of the screw can more easily drive the pushing piece to move.

[0020] Working principle: During the rotation of the screw, the screw drives the push piece to displace axially in the cavity. The push piece moves from the wider end of the cavity to the smaller end, thereby pushing the outer frame outward and the inner frame inward, causing the inner frame to deform inward and the outer frame to deform outward. Finally, the seal moves inward and outward to achieve sealing of cables and pipes.

[0021] The seismic-resistant pipe sealing device obtained by the present invention adopts an inner frame and an outer frame to support the sealing component, so as to improve the pressure-bearing and seismic-resistant capabilities of the sealing component during use, thereby improving the sealing performance and extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural stereogram of the present invention;

[0023] Figure 2 This is a structural front view of the present invention;

[0024] Figure 3 It is a left side view of the structure of the present invention;

[0025] Figure 4 is an axial cross-sectional view of the present invention;

[0026] Figure 5 This is a three-dimensional diagram of the internal structure of the present invention without showing the sealing member;

[0027] Figure 6 This is a schematic diagram of the internal structure of the present invention without showing the sealing member;

[0028] Figure 7 This is a schematic diagram of the structure of the present invention without showing the sealing member and the partial inner frame and outer frame;

[0029] Figure 8 Schematic diagram of the connection structure between the screw and the push piece of the present invention;

[0030] Figure 9 A structural perspective view of the sealing member of the present invention;

[0031] Figure 10 It is a front view of the sealing member of the present invention;

[0032] Figure 11 A three-dimensional diagram of a half-section state of the sealing member of the present invention;

[0033] Figure 12 A front view of a half-section state of the sealing member of the present invention;

[0034] Figure 13 A structural stereogram of the inner skeleton of the present invention;

[0035] Figure 14 It is a structural stereogram of the exoskeleton of the present invention. DETAILED DESCRIPTION

[0036] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0037] Example 1:

[0038] like Figures 1-14 As shown, the present invention discloses an anti-seismic pipe sealing device, including a screw 2 and a seal 1, and also including an inner skeleton 5 and an outer skeleton 6. A push piece 7 is sleeved on the screw 2, and the push piece 7 is connected to the screw 2 by a thread. The number of the push pieces 7 is at least 2, and the number of the inner skeleton 5 and the outer skeleton 6 is at least 2. The outer skeleton 6 is spliced ​​to form a ring structure, and the inner skeleton 5 is spliced ​​to form a ring structure. The inner skeleton 5 and the outer skeleton 6 are respectively arranged on the inner and outer sides of the push piece 7, and a cavity for accommodating the push piece 7 is formed between the outer skeleton 6 and the inner skeleton 5, and the width of one end of the cavity is greater than the width of the other end. When the push piece 7 moves in the cavity, it pushes the outer skeleton 6 outward and pushes the inner skeleton 5 inward, and the seal 1 is respectively arranged on the outside of the outer skeleton 6 and the inside of the inner skeleton 5; the anti-seismic pipe sealing device has an opening and closing structure.

[0039] In this embodiment, the opening and closing structure of the anti-seismic pipeline plugging device is to realize opening and closing by rotating one of the screw rods 2 as a rotation axis.

[0040] The inner frame 5 and outer frame 6 are connected by the screw 2 to form an integral structure. A push piece 7 is also connected to the screw 2. The number of the inner frame 5 and the outer frame 6 is four, because the entire device needs to be opened around one of the screws 2 to facilitate the insertion of cables or pipes, that is, to facilitate the device to be wrapped around the cables or pipes. The ends of the outer frame 6 and the inner frame 5 are connected to the screw 2. The connection can be a rotational connection, that is, the ends of the outer frame 6 and the inner frame 5 need to be bent, and a through hole is provided in the bending area, and the screw 2 is rotationally connected to the through hole. A retaining spring can be provided on the outer screw 2 of the bending area, and a retaining spring can also be provided on the inner screw 2 of the bending area to limit axial displacement. A cavity is formed between the inner frame 5 and the outer frame 6 to accommodate the push piece 7, and the width of one end of the cavity is greater than the width of the other end, that is, the cavity has a V-shaped structure. Each push piece 7 needs to correspond to an independent cavity so that each push piece 7 contacts and squeezes the inner frame 5 and the outer frame 6 when moving on the screw 2. In the natural state, that is, when the inner frame 5 and the outer frame 6 are not squeezed outward, the push piece 7 is located at the end with the larger width of the cavity. When in use, when it is sleeved on the cable or pipe and is in the hole, the screw 2 is rotated. Since the screw 2 and the push piece 7 are threadedly connected, the push piece 7 will move axially on the screw 2. At this time, the push piece 7 gradually moves from the end with the larger gap to the end with the smaller gap. Since the width of the push piece 7 is determined, the push piece 7 will squeeze the inner frame 5 inward and the outer frame 6 outward. In this process, the inner seal 1 is squeezed inward and the outer seal 1 is squeezed outward, so that the device can seal the gap between the cable and the cable pipe or through hole. Moreover, the interior of the seal 1 is always supported by the inner frame 5 and the outer frame 6, providing great support capacity, and can maintain good sealing performance even in the rubber fatigue state after long-term use. When the cable or the like vibrates slightly, the seal 1 will transmit the vibration to the inner frame 5 and the outer frame 6, which can absorb the vibration and undergo slight expansion and contraction changes to ensure that the seal 1 and the cable always remain sealed and have high stability.

[0041] The number of screws 2 is five, and the push piece 7 is a semi-circular ring structure, with the ends of the screws 2 and the push piece 7 being connected by threads. If the number of screws is two, a connecting shaft is also required, which connects the push piece 7, the inner frame 5, and the outer frame 6, and enables the inner frame 5, the outer frame 6, and the push piece 7 to rotate around the connecting shaft, so that the pipeline sealing device can be opened to allow the insertion of cables, etc.

[0042] In this embodiment, the number of the screw rods 2 is 5, and the push piece 7 is in a semi-circular ring structure, wherein one screw rod 2 is connected to the end of the push piece 7 by a thread, two are arranged at the end of the device when it is unfolded, and the other two are respectively arranged in the middle of the two parts after the device is unfolded. The push piece 7 and the inner frame 5 and the outer frame 6 are unfolded around the screw rod 2 for the cable or pipe to be placed. The main function of the above-mentioned screw rod 2 is to connect the inner frame 5, the outer frame 6, and the push piece 7. The screw rod 2 serves as a rotating shaft, and the device unfolds around the screw rod 2, that is, forming two semi-circular structures, which are convenient for being connected to the cable. In this embodiment, in addition to the function of driving the push piece 7 to move when rotating, the screw rod 2 also has the function of connecting the various components, and the functions do not interfere with each other. This form increases the force application point of the screw rod 2 on the push piece 7, thereby making the force applied to the push piece 7 during the rotation of the screw rod 2 more stable, and the push piece 7 has higher stability in supporting the inner frame 5 and the outer frame 6. The lengths of the screw 2, the inner frame 5 and the outer frame 6 can be selected according to actual needs. The pipe sealing device is not affected by the length and is suitable for sealing cables in long holes, and of course, is also suitable for sealing cables in shorter through holes.

[0043] like Figure 13 、 Figure 14 As shown, the inner frame 5 is evenly spaced on the same circumference with a plurality of hollow structures 8, and the inner frame 5 between adjacent hollow structures 8 is bent outward to form a bent portion 9. The outer frame 6 is evenly spaced on the same circumference with a plurality of hollow structures 8, and the inner frame 5 between adjacent hollow structures 8 is bent inward to form a bent portion 9. The bent portion 9 of the outer frame 6 fits within the hollow structure 8 of the inner frame 5, and the bent portion 9 of the inner frame 5 fits within the hollow structure 8 of the outer frame 6. The inner frame 5 and the outer frame 6 form an intersection, and the outer frame 6 and the bent portion 9 on the inner frame 5 cooperate to form a cavity for accommodating the push piece 7. Holes or grooves are provided on the inner frame 5 and the outer frame 6 at positions corresponding to the screw 2 for the screw 2 to pass through, and when the inner frame 5 and the outer frame 6 are squeezed by the push piece 7 and displaced, they will not interfere with the screw 2. Arc bends can be set in the areas outside the bending parts 9 and the hollow structure 8 on the inner frame 5 and the outer frame 6. The formed arc bends can enhance their deformation ability and thus increase the deformation amount when the push piece 7 squeezes the inner frame 5 and the outer frame 6 to cause them to deform.

[0044] Under normal circumstances, the inner frame 5 can be provided with an outward bending portion 9, and the outer frame 6 can be provided with an inward bending portion 9, so that a cavity with one end larger than the other end can be formed between the bending portions 9 of the inner frame 5 and the outer frame 6. In this case, during the movement of the push piece 7, the maximum distance that the inner frame 5 is stretched inward and the outer frame 6 is stretched outward is the width of the push piece 7. In this embodiment, hollow structures 8 are provided at intervals on the corresponding circumferences of the inner frame 5 and the outer frame 6, and the hollow structures 8 are staggered with each other, and the hollow structures 8 are bent to form bending portions 9, which can effectively increase the amplitude of the bending. By passing the bending portion 9 through the corresponding hollow structure 8, the bending amplitude of the bending portions 9 on the inner frame 5 and the outer frame 6 can be doubled while the gap between the inner frame 5 and the outer frame 6 remains unchanged. Therefore, during the movement of the push piece 7, the distance that the inner frame 5 is stretched inward and the outer frame 6 is stretched out can be doubled, thereby greatly improving the gap size that can be blocked by the pipeline sealing device, improving the scope of application, and the sealing performance is also improved accordingly. At the same time, since the inner frame 5 and the outer frame 6 are both arc-shaped structures, there is a hollow structure 8 between the adjacent bent parts 9 on the inner frame 5 and the outer frame 6. When the seal 1 is vibrated during use, the bent parts 9 on the inner frame 5 and the outer frame 6 are more likely to absorb vibration, that is, they have better elasticity and stronger shock resistance, which can improve the service life and sealing performance of the pipeline sealing device.

[0045] A sealing protrusion 4 is provided on the sealing member 1 at the maximum width of the cavity accommodating the push piece 7. The sealing protrusion 4 is an annular structure. In this embodiment, the maximum width of the cavity accommodating the push piece 7 is the area where the inner and outer frames 5 and 6 experience the greatest internal and external deformation during the movement of the push piece 7. Therefore, providing the sealing protrusion 4 in this area allows for better compression, enabling the sealing protrusion 4 to seal against cables, pipes, etc., with greater pressure and excellent sealing performance.

[0046] like Figure 9 、 Figure 10 、 Figure 11 、 Figure 12As shown, the seal 1 is annular in structure, one part of the seal 1 is axially disconnected, and one end of the seal 1 forms a concave cavity 11 inwardly. The screw 2, the inner skeleton 5, the outer skeleton 6 and the connector at at least one end are inserted into the concave cavity 11, and the seal 1 covers the inner skeleton 5 and the outer skeleton 6 inside. The seal 1 of the annular structure is axially disconnected at one part, so that the pipeline sealing device can be opened, and the seal 1 at the disconnection point can be sealed inside and outside to improve the sealing effect. One end of the seal 1 forms a concave cavity 11, and other components are inserted into the concave cavity 11. Then, during the use of the pipeline plug, the outer wall and inner wall of the seal 1 of the pipeline plug are sealed with the cable and the pipeline, and the annular gap can be completely blocked. The entire gap is blocked by the seal 1, which greatly improves the waterproof performance. Moreover, the screw 2 and the like do not pass through the seal 1, so compared with the existing pipeline plug, its sealing and waterproof performance is greatly improved.

[0047] like Figure 10 、 Figure 11 As shown, both sidewalls of the seal 1 at the break have a corrugated structure 12, and the corrugated structures 12 of the two sidewalls cooperate with each other. The corrugated structure 12 at the break of the seal 1 provides a more thorough axial seal when squeezed by the inner frame 5 and the outer frame 6, achieving a better sealing effect and preventing gaps from forming and leaking.

[0048] One end of the sealing protrusion 4 at the break in the seal 1 is recessed into the sidewall of the break, while the other end protrudes beyond the sidewall. When the break in the seal 1 is butted, the two ends of the sealing protrusion 4 butt against the sides of the break. The break in the sealing protrusion 4 is offset from the break in the seal 1 to prevent leakage caused by overlapping deformation of the two breakpoints, further improving sealing reliability.

[0049] Push pieces 7 are set at three axial positions of the screw 2. The push pieces 7 at the same axial position form a ring. The push pieces 7 are all connected to the screw 2 through threads. Bending portions 9 are set on the inner skeleton 5 and the outer skeleton 6 corresponding to the push pieces 7, and a cavity for accommodating the push pieces 7 is formed. A sealing protrusion 4 is set on the seal 1 at the position with the maximum width of the cavity for accommodating the push pieces 7.

[0050] The number of sealing protrusions 4 on the pipe sealing device can be set according to actual needs and the length of the pipe sealing device to improve its sealing and waterproof performance. In order to ensure that each sealing protrusion 4 can be stably supported and squeezed to ensure sealing, a corresponding push piece 7 is set on the screw 2 corresponding to the sealing protrusion 4, and a bending portion 9 and a cavity formed between the bending portions 9 must be set on the inner frame 5 and the outer frame 6 corresponding to the push piece 7. Push pieces 7 at multiple axial positions are connected to the screw 2. When the screw 2 rotates, the push piece 7 moves the same distance on the screw 2, so the push piece 7 keeps the same squeeze on the inner frame 5 and the outer frame 6, and finally achieves basically consistent sealing performance of each sealing protrusion 4, and the sealing effect is more stable and reliable.

[0051] Two connectors 3 are provided on the screw 2 at the open end of the concave cavity 11 of the seal 1. The connectors 3 are semi-annular in structure, and the two connectors 3 form an annular structure. The connectors 3 can connect the ends of the screw 2, the inner frame 5, and the outer frame 6 into one. The connector 3 can be semi-annular in structure, and a through hole can be provided on the connector 3. The screw 2 and the through hole on the connector 3 are rotatably connected. The two are not connected by threads. The end of the screw 2 can be raised outward to form a step, and an internal hexagon socket is provided inside. In this way, the connector 3 can be clamped. The other end of the screw 2 is clamped to the ends of the inner frame 5 and the outer frame 6 by a retaining spring.

[0052] A cover plate 10 is provided at the unopened end of the seal 1 to prevent damage to the rubber at the end during use. The opening is the opening of the cavity 11. The cross-section of the cover plate 10 is a U-shaped structure, which is directly snapped onto the end of the seal 1 or glued.

[0053] Protrusions 13 are spaced apart on both sides of the push piece 7. The push piece 7 contacts the inner frame 5 and the outer frame 6 via the protrusions 13 to reduce the contact area between the push piece 7 and the inner frame 5 and the outer frame 6, thereby reducing the friction between the push piece 7 and the inner frame 5 and the outer frame 6, so that the rotation of the screw 2 can more easily drive the push piece 7 to move. The protrusions 13 on the push piece 7 are evenly spaced, so that the force exerted by the push piece 7 on the inner frame 5 and the outer frame 6 is uniform and stable.

[0054] The push piece 7 needs to have a certain strength and hardness. During use, the push piece 7 can support the inner frame 5 and the outer frame 6 to ensure the sealing and service life of the device.

[0055] The inner frame 5 and the outer frame 6 have good strength and toughness, and their materials are not specifically limited, and can be steel or other polymer materials. The material of the sealing member 1 can be rubber or other materials with sealing function.

[0056] The semi-annular structure involved in this embodiment refers to two parts that can basically form a circle after being spliced ​​together. The central angle of the circle is not necessarily 180° and can be slightly less than 180°. For example, after the connector 3 is spliced, the thickness of the seal 1 at the disconnection point needs to be left to ensure that the seal 1 forms a circular ring structure after closing.

[0057] Example 2:

[0058] The present invention discloses an earthquake-resistant pipe sealing device, which differs from Example 1 in that the number of inner skeletons 5 and outer skeletons 6 can be 2 pieces. Of course, other different numbers of inner skeletons 5 and outer skeletons 6 can also be selected according to actual needs, such as 3 pieces, 5 pieces or others.

[0059] Example 3:

[0060] The present invention discloses an earthquake-resistant pipe sealing device, which differs from Example 1 in that: the number of screws 2 can be selected as 2. If two screws 2 are used, a connecting shaft can be set at the rotation point of the inner skeleton 5 and the outer skeleton 6, which is used to connect the inner skeleton 5, the outer skeleton 6 and the push piece 7 to enable them to open and close. The two screws 2 are respectively set on both sides to drive the push piece 7 to move; of course, different numbers of screws 2 can be selected according to the inner diameter size of the device, such as 6, 7, 9 or even more.

[0061] Example 4:

[0062] The present invention discloses an anti-seismic pipeline plugging device, which differs from Example 1 in that: according to actual needs, push pieces 7 are set at different axial positions on the screw 2, such as only setting the push piece 7 at one axial position. Then, a bending portion 9 is set at one of the axial positions of the inner skeleton 5 and the outer skeleton 6, and a cavity is formed between the bending portions 9. The push piece 7 is set in the cavity. When the screw 2 drives the push piece 7 to move, the inner skeleton 5 is driven to deform inward and the outer skeleton 6 is driven to deform outward; a sealing protrusion 4 is set on the sealing member 1 at the corresponding position of the cavity. Of course, according to actual needs, 2, 4, 5 or even more push pieces 7 can be set at different positions of the screw 2, a corresponding number of cavities are formed between the inner skeleton 5 and the outer skeleton 6, and corresponding sealing protrusions 4 are set at the corresponding positions of the cavities.

[0063] Example 5:

[0064] The present invention discloses an anti-seismic pipe plugging device, which differs from Example 1 in that: the anti-seismic pipe plugging device is divided into two parts, and the two parts are respectively composed of an inner skeleton 5, an outer skeleton 6, a screw 2 and a seal 1. The matching form of the inner skeleton 5, the outer skeleton 6, the screw 2 and the seal 1 is similar to that of Example 1, and the above two parts form a tubular structure after matching. The circumferential ends of each part can have the same structure as the disconnection point of the seal 1 in Example 1 to improve the sealing effect of the connection after matching. Of course, in other embodiments, the anti-seismic pipe plugging device can also be divided into three or more parts, and the parts can form a tubular structure after being connected.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0066] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to the interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0067] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0068] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simplified modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A seismic-resistant pipeline plugging device, comprising a screw and a seal, characterized in that: It also includes an inner frame and an outer frame, a pushing piece is sleeved on the screw, and the pushing piece is connected to the screw by a thread, the number of the pushing pieces is at least 2, and the number of the inner frame and the outer frame are at least 2 respectively. The outer frame forms an annular structure after splicing, and the inner frame forms an annular structure after splicing; the inner frame and the outer frame are respectively arranged on the inner and outer sides of the pushing piece, and a cavity for accommodating the pushing piece is formed between the outer frame and the inner frame, each pushing piece corresponds to a cavity, and the width of one end of each cavity is greater than the width of the other end. The pushing piece is displaced in the cavity under the action of the screw, thereby pushing the exoskeleton outward and the inner frame inward, and the sealing members are respectively arranged on the outer side of the exoskeleton and the inner side of the inner frame; The seismic-resistant pipe device has an open-close structure; there are at least two screws, and the push piece has a semi-circular structure, and the ends of the screw and the push piece are connected by threads; a number of hollow structures are evenly spaced on the same circumference of the inner skeleton, and the inner skeleton between adjacent hollow structures is bent outward to form a bending portion, and a number of hollow structures are evenly spaced on the same circumference of the outer skeleton, and the outer skeleton between adjacent hollow structures is bent inward to form a bending portion, the bending portion of the outer skeleton fits in the hollow structure of the inner skeleton, and the bending portion of the inner skeleton fits in the hollow structure of the outer skeleton, forming a cross between the inner skeleton and the outer skeleton, and the outer skeleton and the bending portion on the inner skeleton cooperate to form a cavity for accommodating the push piece.

2. The seismic-resistant pipeline plugging device according to claim 1, characterized in that: A sealing protrusion is provided on the sealing member at the position where the width of the cavity accommodating the push piece is the largest, and the sealing protrusion is in an annular structure.

3. The seismic-resistant pipeline plugging device according to claim 2, characterized in that: The seal is annular in structure, one part of the seal is broken in the axial direction, one end of the seal forms a concave cavity inward, the screw, inner frame, outer frame and the connector at least at one end are inserted into the concave cavity, and the seal covers the inner frame and outer frame.

4. The seismic-resistant pipeline plugging device according to claim 3, characterized in that: The two side walls at the break of the sealing member both have a corrugated structure, and the corrugated structures of the two side walls cooperate with each other.

5. The seismic-resistant pipeline plugging device according to claim 3 or 4, characterized in that: One end of the sealing protrusion at the broken part of the seal is indented into the side wall of the broken part, and the other end protrudes from the side wall of the broken part. When the broken part of the seal is butt-jointed, the two ends of the sealing protrusion butt-join at the side of the broken part.

6. The seismic-resistant pipeline plugging device according to claim 3, characterized in that: Pushing pieces are set at one or more axial positions of the screw, and the pushing pieces at the same axial position form a ring. The pushing pieces are all connected to the screw through threads. Bending parts are set on the inner frame and the outer frame corresponding to the pushing pieces, and a cavity for accommodating the pushing pieces is formed.

7. The seismic-resistant pipeline plugging device according to claim 3, characterized in that: Two connectors are arranged on the screw at the open end of the concave cavity of the sealing component. The connectors are in a semi-annular structure, and the two connectors form an annular structure.

8. The seismic-resistant pipeline plugging device according to claim 1 is characterized in that: Bumps are arranged at intervals on both sides of the pushing piece, and the pushing piece contacts the inner frame and the outer frame via the bumps, so as to reduce the contact area between the pushing piece and the inner frame and the outer frame.

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