A waterproof expansion joint for buildings

Abstract

The present invention relates to the technical field of building construction, and particularly relates to a waterproof expansion joint for buildings, which comprises a waterstop belt and two bases. The two bases fix and press the waterstop belt on the buildings on both sides of the expansion joint; a cover plate is jointly arranged on the two bases, and both sides of the cover plate are respectively connected to the two bases through elastic members; a rotating cylinder is vertically arranged on the cover plate, and the rotating cylinder and the cover plate form a stop fit; a first rotating ring is movably sleeved on the rotating cylinder, a second rotating ring is threadedly sleeved on the rotating cylinder, the first rotating ring is arranged close to the cover plate, and a plurality of elastic pieces are connected between the first rotating ring and the second rotating ring; two rotating arms are symmetrically arranged on the first rotating ring, and a fixed convex is arranged on each rotating arm; a limiting strip is arranged on each base, the inner side wall of the limiting strip can form a stop fit with the rotating arm, and the outer side wall of the limiting strip can form a stop fit with the fixed convex. Thus, after the position of the cover plate is determined, rotating the rotating cylinder can lock the position of the cover plate.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a waterproof expansion joint for buildings. Background Art

[0002] An expansion joint refers to a structural joint provided at an appropriate position along the direction of the construction joint of a building to prevent cracks or damage to the structure caused by thermal expansion and contraction of the building due to climate temperature changes.

[0003] In related technologies, for example, Chinese Patent CN220666640U discloses a roofing waterproof expansion structure device. The roofing waterproof expansion structure device includes a group of bases located in the expansion joint between two floor slabs. A cover plate is horizontally installed at the top of the expansion joint. Two ends of the cover plate are respectively connected to the upper end surfaces of the two bases. A horizontally arranged sliding rod is connected below the cover plate. Ball heads are provided at both ends of the sliding rod. The two ball heads at both ends slide in the sliding grooves of the two bases respectively. The movement of the sliding rod in the sliding groove can drive the movement of the cover plate, facilitating the installation of the cover plate.

[0004] However, the above roofing waterproof expansion structure device also has some problems in the actual installation process: Firstly, the installation of the sliding rod is inconvenient. When installing the sliding rod, it is necessary to enter from the end of the sliding groove and adjust the position. Not only is the operating space limited, but also it is easy to get stuck, consuming time and effort. Secondly, the fixing process between the sliding rod and the cover plate is relatively complex. When connecting the sliding rod and the cover plate, the relative positions between the two need to be adjusted multiple times, which is troublesome to operate and affects the installation efficiency. Summary of the Invention

[0005] Based on this, it is necessary to provide a waterproof expansion joint for buildings in view of the problems of troublesome operation and low efficiency existing in the installation process of the current building expansion joint structure.

[0006] The above object is achieved by the following technical solutions:

[0007] A waterproof expansion joint for buildings, the waterproof expansion joint for buildings comprising two bases respectively fixedly arranged on buildings on both sides of the expansion joint; a waterstop belt is jointly clamped between the two bases and the buildings on both sides of the expansion joint; a cover plate is jointly arranged on the two bases, the plate surface of the cover plate is perpendicular to the depth direction of the expansion joint, and both sides of the cover plate are respectively connected to the two bases through elastic members; a rotating cylinder is vertically arranged on the cover plate, the rotating cylinder and the cover plate form a stop fit and can rotate around its own axis; a first rotating ring is movably sleeved on the rotating cylinder; a second rotating ring is threadedly sleeved on the rotating cylinder, the second rotating ring can rotate synchronously with the rotating cylinder during use, the second rotating ring is arranged farther away from the cover plate than the first rotating ring, and a plurality of elastic pieces are circumferentially connected between the first rotating ring and the second rotating ring; two rotating arms are symmetrically arranged on the first rotating ring, the rotating arms extend along the radial direction of the first rotating ring, and a fixed convex is arranged on each rotating arm; a limiting strip is arranged on each base, the limiting strip extends along the length direction of the expansion joint, and the inner side wall of the limiting strip can form a stop fit with the rotating arm and the fixed convex, and the outer side wall of the limiting strip can form a stop fit with the fixed convex; the distance between the two limiting strips is less than the distance between the outer ends of the two rotating arms.

[0008] Further, the number of the limiting strips is multiple, and the multiple limiting strips are arranged at intervals along the width direction of the expansion joint; from inside to outside, the thickness of the limiting strips on the same base along the depth direction of the expansion joint increases in sequence; the distance between the two outermost limiting strips on the two bases is less than the distance between the outer ends of the two rotating arms.

[0009] Further, the waterproof expansion joint for buildings further comprises a water pumping assembly configured to pump out the water accumulated on the waterstop belt.

[0010] Further, both ends of the rotating cylinder are open; the water pumping assembly comprises a sealing plug, a conduit and a plurality of elastic valves, the sealing plug plugs the end of the rotating cylinder away from the waterstop belt; the conduit is inserted into the rotating cylinder and can rotate relative to the first rotating ring and can also slide synchronously with the first rotating ring along the axis direction of the rotating cylinder; the plurality of elastic valves are all arranged on the inner peripheral wall of the conduit and are arranged circumferentially and have a closed state and an open state, and when in the closed state, the plurality of elastic valves divide the inside of the conduit into two non-communicating chambers along the axial direction.

[0011] Further, a sliding groove is provided on the circumferential side wall of the rotating cylinder, and the sliding groove extends along the axial direction of the rotating cylinder; an annular groove is coaxially provided on the inner peripheral wall of the first rotating ring; a guiding protrusion is provided on the outer peripheral wall of the conduit, the guiding protrusion extends along the radial direction of the conduit, and is simultaneously slidably inserted into the sliding groove and the annular groove.

[0012] Further, there are a plurality of the guiding protrusions, and they are arranged circumferentially; the number of the sliding grooves is equal to the number of the guiding protrusions, and they are correspondingly arranged.

[0013] Further, the elastic valve is made of rubber material.

[0014] Further, the sealing plug is threadedly inserted on the rotating cylinder.

[0015] Further, the elastic member is an elastic rubber strip, and two ends of the elastic rubber strip are respectively fixedly arranged on the base and the cover plate.

[0016] Further, the elastic sheet is made of stainless steel material.

[0017] The beneficial effects of the present invention are as follows:

[0018] During the installation process of the waterproof expansion joint for buildings provided by the present invention, first, the water stop belt is fixedly pressed on the buildings on both sides of the expansion joint through two bases, then the cover plate is placed on the two bases simultaneously, then the cover plate is moved to a proper position, and then the rotating cylinder is rotated; during the rotation of the rotating cylinder, the rotating arm first forms a stop fit with the inner side wall of the limiting strip, then the fixing protrusion forms a stop fit with the inner side wall of the limiting strip, and then the fixing protrusion forms a stop fit with the outer side wall of the limiting strip; then the rotation of the rotating cylinder is stopped. At this time, under the elastic action, the elastic sheet has both a tendency to drive the first rotating ring and the second rotating ring to move away from each other and a tendency to drive the first rotating ring and the second rotating ring to rotate in the opposite direction. Thus, on the one hand, the connection firmness between the fixing protrusion and the outer side wall of the limiting strip can be improved, and on the other hand, due to the threaded fit between the second rotating ring and the rotating cylinder, there is a tendency to drive the cover plate to closely adhere to the base. While quickly fixing the cover plate, it is beneficial to improve the connection strength between the cover plate and the base; then one of the elastic members is connected between one side of the cover plate and one of the bases, and then the other elastic member is connected between the other side of the cover plate and the other base to complete the installation.

[0019] Further, by providing a plurality of limiting strips, and the thickness of the limiting strips on the same base increases successively along the depth direction of the expansion joint, it is possible to adjust the stop fit between the fixing protrusion and different limiting strips according to different usage situations and requirements, and further adjust the connection strength between the fixing protrusion and the outer side wall of the limiting strip and between the cover plate and the base.

[0020] Furthermore, by setting up a pumping component, during use, the water accumulated on the water stop belt can be pumped out, avoiding the impact on the service life of the water stop belt caused by long-term water accumulation on it. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the waterproof expansion joint for buildings provided by the embodiment of the present invention;

[0022] Figure 2 Front view structure schematic diagram of the waterproof expansion joint for buildings provided by the embodiment of the present invention;

[0023] Figure 3 is Figure 2 Partial enlarged structure schematic diagram at A in

[0024] Figure 4 is Figure 2 Cross-sectional view taken along the line B-B in

[0025] Figure 5 is Figure 4 Partial enlarged structure schematic diagram at C in

[0026] Figure 6 Top view structure schematic diagram of the waterproof expansion joint for buildings provided by the embodiment of the present invention;

[0027] Figure 7 is Figure 6 Cross-sectional view taken along the line D-D in

[0028] Figure 8 is Figure 7 Partial enlarged structure schematic diagram at E in

[0029] Figure 9 Schematic diagram of the three-dimensional structure of the waterproof expansion joint for buildings provided by the embodiment of the present invention with the cover removed;

[0030] Figure 10 Working principle of the waterproof expansion joint for buildings provided by the embodiment of the present invention Figure 1 ;

[0031] Figure 11 Working principle of the waterproof expansion joint for buildings provided by the embodiment of the present invention Figure 2 ;

[0032] Figure 12 Working principle of the waterproof expansion joint for buildings provided by the embodiment of the present invention Figure 3 ;

[0033] Figure 13 Exploded view of the rotating cylinder, first rotating ring, second rotating ring, elastic piece and pumping component of the waterproof expansion joint for buildings provided by the embodiment of the present invention.

[0034] in:

[0035] 1. Base; 101. Second clamping part; 2. Building; 3. Water stop; 4. Cover plate; 401. First clamping part; 5. Elastic rubber strip; 6. Rotating cylinder; 601. Slide groove; 602. First ring platform; 603. Second ring platform; 604. Fourth ring platform; 605. Fifth ring platform; 7. First rotating ring; 701. Ring groove; 8. Second rotating ring; 9. Spring piece; 10. Rotating arm; 11. Fixing protrusion; 12. Limiting strip; 13. Pumping assembly; 1301. Sealing plug; 1302. Conduit; 13021. Guide protrusion; 13022. Third ring platform; 1303. Elastic valve; 13031. Support arc piece; 14. Expansion bolt. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0037] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 a limitation to the present invention.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] like Figures 1 to 13As shown in the figure, the waterproof expansion joint for buildings provided by the embodiment of the present invention is arranged to include two bases 1, and the two bases 1 are respectively fixedly arranged on the buildings 2 on both sides of the expansion joint; a waterstop 3 is jointly clamped between the two bases 1 and the buildings 2 on both sides of the expansion joint; a cover plate 4 is jointly arranged on the two bases 1, the plate surface of the cover plate 4 is perpendicular to the depth direction of the expansion joint, and both sides of the cover plate 4 are respectively connected to the two bases 1 through elastic members; a rotating cylinder 6 is vertically arranged on the cover plate 4, the rotating cylinder 6 and the cover plate 4 form a stop fit and can rotate around its own axis; a first rotating ring 7 is movably sleeved on the rotating cylinder 6; a second rotating ring 8 is threadedly sleeved on the rotating cylinder 6, and the second rotating ring 8 can rotate synchronously with the rotating cylinder 6 during use. The second rotating ring 8 is arranged farther away from the cover plate 4 than the first rotating ring 7, and a plurality of elastic pieces 9 are connected between the first rotating ring 7 and the second rotating ring 8; two rotating arms 10 are symmetrically arranged on the first rotating ring 7, the rotating arms 10 extend along the radial direction of the first rotating ring 7, and a fixing convex 11 is arranged on each rotating arm 10; a limiting strip 12 is arranged on each base 1, the limiting strip 12 extends along the length direction of the expansion joint, the inner side wall of the limiting strip 12 can form a stop fit with the rotating arms 10 and the fixing convex 11, and the outer side wall of the limiting strip 12 can form a stop fit with the fixing convex 11; the distance between the two limiting strips 12 is smaller than the distance between the outer ends of the two rotating arms 10.

[0040] Specifically in this embodiment, taking the example that the two buildings 2 are arranged at intervals in the horizontal direction, the expansion joint is formed between the two buildings 2; the waterstop 3 is arranged on the tops of the two buildings 2 at the same time during installation, and the part of the waterstop 3 located at the top of the expansion joint is U-shaped and is inserted into the interior of the expansion joint in a suspended manner to ensure that the waterstop effect can be achieved; the base 1 is fixed to the top of the building 2 through an expansion bolt 14 during installation; the cover plate 4 is horizontally arranged on the tops of the two bases 1 during installation, and both sides of the cover plate 4 along the width direction of the expansion joint are respectively connected to the two bases 1 through elastic members to ensure that when the building 2 expands and contracts due to climate temperature changes, cracks or damages of the building 2 can be avoided through the elastic deformation of the elastic members.

[0041] To facilitate the installation of the rotating cylinder 6, an installation hole is arranged on the top plate surface of the cover plate 4. The rotating cylinder 6 is vertically arranged during installation, and the top end is inserted into the cover plate 4 through the installation hole, and the bottom end is arranged in a suspended manner and is located below the cover plate 4; to facilitate the stop fit between the rotating cylinder 6 and the cover plate 4, a sinking groove is arranged at the installation hole, and a first ring platform 602 is fixedly sleeved on the outer peripheral wall of the top of the rotating cylinder 6. The first ring platform 602 is inserted into the sinking groove during installation.

[0042] When the first rotating ring 7 is installed, its inner peripheral wall contacts the outer peripheral wall surface of the rotating cylinder 6, so that the first rotating ring 7 and the rotating cylinder 6 are coaxially arranged, ensuring that the first rotating ring 7 has a definite position, and enabling the first rotating ring 7 to rotate relative to the rotating cylinder 6 and also move axially relative to the rotating cylinder 6, realizing a movable connection; for facilitating the formation of a threaded fit between the second rotating ring 8 and the rotating cylinder 6, an internal thread is provided on the inner peripheral wall of the second rotating ring 8, and an external thread is provided on the outer peripheral wall at the bottom of the rotating cylinder 6; in order to enable the second rotating ring 8 to rotate synchronously with the rotating cylinder 6, it is set that initially, the second rotating ring 8 is located at the top limit position of the external thread.

[0043] Optionally, to improve the stability of the second rotating ring 8 when it is located at the top limit position of the external thread, a second ring platform 603 is fixedly sleeved on the rotating cylinder 6, and the second ring platform 603 is located at the top of the external thread; the second rotating ring 8 is initially located at the top limit position of the external thread and forms a frictional abutment with the second ring platform 603.

[0044] The number of the elastic pieces 9 can be set to six. The six elastic pieces 9 are evenly arranged in the circumferential direction and are all vertically arranged initially. The tops of the six elastic pieces 9 are fixedly arranged on the bottom end surface of the first rotating ring 7 during installation, and the bottoms are fixedly arranged on the top end surface of the second rotating ring 8, ensuring that it can both support the first rotating ring 7 and drive the first rotating ring 7 to move when undergoing elastic deformation; the rotating arm 10 is arranged on the outer peripheral wall of the first rotating ring 7 and extends in the radial direction. The rotating arm 10 initially extends along the length direction of the expansion joint; the fixed convex 11 is arranged at the top of the rotating arm 10 and is arranged close to the outer end of the rotating arm 10; the limiting strip 12 is arranged at the bottom of the base 1 and is arranged close to the rotating cylinder 6.

[0045] During the use process, first place the waterstop 3 on the tops of the buildings 2 on both sides of the expansion joint, ensuring that the part of the waterstop 3 located at the top of the expansion joint is U-shaped and is inserted into the expansion joint internally in a suspended manner to ensure its waterstop effect; subsequently, use the expansion bolts 14 to fix the two bases 1 on the buildings 2 on both sides of the expansion joint respectively, realizing the fixed pressing of the waterstop 3; then place the cover plate 4 horizontally on the tops of the two bases 1, and then move the cover plate 4 to adjust the cover plate 4 to a proper position.

[0046] When the position of the cover plate 4 is determined, rotate the rotating cylinder 6 in the direction of tightening the second rotating ring 8. The rotating cylinder 6 synchronously drives the second rotating ring 8 to rotate, and the second rotating ring 8 drives the first rotating ring 7 to rotate through the six evenly arranged elastic pieces 9.

[0047] As Figure 10As shown, when the first rotating ring 7 rotates to a position where the rotating arm 10 forms a stop fit with the inner wall of the limiting strip 12, the rotating arm 10 is inclined. As the rotating cylinder 6 continues to rotate, the first rotating ring 7 stops rotating because the rotating arm 10 is blocked by the inner wall of the limiting strip 12, while the second rotating ring 8 continues to rotate, causing the elastic piece 9 to twist and drive the first rotating ring 7 closer to the second rotating ring 8. When the first rotating ring 7 moves to a position where the rotating arm 10 disengages from the stop fit with the inner wall of the limiting strip 12, the fixed convex 11 forms a stop fit with the inner wall of the limiting strip 12. As the rotating cylinder 6 continues to rotate, the first rotating ring 7 stops rotating because the fixed convex 11 is blocked by the inner wall of the limiting strip 12, while the second rotating ring 8 continues to rotate, and the elastic piece 9 continues to twist and drive the first rotating ring 7 closer to the second rotating ring 8.

[0048] When the first rotating ring 7 moves to a position where the fixed convex 11 disengages from the stop fit with the inner wall of the limiting strip 12, as the rotating cylinder 6 continues to rotate, the first rotating ring 7 resumes synchronous rotation and drives the rotating arm 10 to rotate until the fixed convex 11 is located below the limiting strip 12. The elastic piece 9 is released, driving the first rotating ring 7 to rotate in the reverse direction and move away from the second rotating ring 8, as Figure 11 shown. Subsequently, the fixed convex 11 forms a stop fit with the outer wall of the limiting strip 12. At this time, the rotating arm 10 is inclined and intersects with the previous inclination direction. Then, the rotation of the rotating cylinder 6 is stopped. At this time, under the elastic action, the elastic piece 9 has a tendency to drive the first rotating ring 7 and the second rotating ring 8 to move away from each other, and also has a tendency to drive the first rotating ring 7 and the second rotating ring 8 to rotate in the reverse direction. This tendency, on the one hand, causes the fixed convex 11 and the limiting strip 12 to be clamped tightly, thereby improving the connection firmness between the fixed convex 11 and the limiting strip 12. On the other hand, through the threaded fit between the second rotating ring 8 and the rotating cylinder 6, the cover plate 4 can be tightly attached to the base 1, thus achieving rapid fixation of the cover plate 4 while facilitating the improvement of the connection stability between the cover plate 4 and the base 1.

[0049] Finally, connect one elastic member between one side of the cover plate 4 and one of the bases 1, and then connect the other elastic member between the other side of the cover plate 4 and the other base 1.

[0050] When the waterproof expansion joint for buildings needs to be disassembled, rotate the rotating cylinder 6 in the direction of tightening the second rotating ring 8. At this time, since the fixed convex 11 is blocked by the outer side wall of the limiting strip 12, the first rotating ring 7 stops rotating, while the second rotating ring 8 continues to rotate. As the rotating cylinder 6 rotates, the elastic piece 9 is twisted and drives the first rotating ring 7 to approach the second rotating ring 8. When the first rotating ring 7 moves until the fixed convex 11 disengages from the outer side wall of the limiting strip 12, under the action of the elastic piece 9, the first rotating ring 7 continues to rotate, causing the rotating arm 10 to rotate to extend along the length direction of the expansion joint. It rotates a total of 180 degrees and returns to the initial state. At this time, the cover plate 4 and all its components can be removed from the base 1.

[0051] In some embodiments, there are multiple limiting strips 12, and the multiple limiting strips 12 are arranged at intervals along the width direction of the expansion joint. From the inside to the outside, the thickness of the limiting strips 12 on the same base 1 along the depth direction of the expansion joint increases in sequence. The distance between the two outermost limiting strips 12 on the two bases 1 is less than the distance between the outer ends of the two rotating arms 10, ensuring that the fixed convex 11 can rotate to form a stop fit with the side walls of different limiting strips 12 when the rotating cylinder 6 rotates.

[0052] Specifically in this embodiment, the limiting strips 12 on the same base 1 are arranged parallel to each other and are equally spaced along the width direction of the expansion joint. In this way, the waterproof expansion joint for buildings can flexibly adapt to the climate temperature changes in different regions.

[0053] Specifically, taking Xinjiang region with a large range of climate temperature changes as an example, when the waterproof expansion joint for buildings is applied to this area, due to the large temperature difference between day and night and significant seasonal temperature changes in this area, a greater degree of adjustment function of the expansion joint is required. In actual application, when the climate temperature change in the application area is greater, the rotating cylinder 6 can be adjusted to make the fixed convex 11 cooperate with the outermost limiting strip 12, thereby making the elastic deformation degree of the elastic piece 9 greater. Under the elastic action, the tendency of the elastic piece 9 to drive the first rotating ring 7 and the second rotating ring 8 to move away from each other and the tendency of reverse rotation will increase accordingly. This increasing tendency has important effects: on the one hand, it can significantly enhance the connection firmness between the fixed convex 11 and the outer side wall of the limiting strip 12, so that it still maintains a stable connection during the expansion and contraction of the building 2 caused by frequent temperature changes; on the other hand, through the threaded fit between the second rotating ring 8 and the rotating cylinder 6, there will be a greater tendency to drive the cover plate 4 to closely fit the base 1, thereby effectively improving the waterproof performance and structural stability of the expansion joint in a large temperature difference environment.

[0054] Similarly, when the building waterproof expansion joint is applied to the Central Plains region where the climate temperature change is relatively small, the situation is different; the climate in the Central Plains region is relatively mild, and the temperature fluctuation is relatively gentle. In this environment, if the waterproof expansion joint has been in a high-load adjustment state, it will not only cause excessive material loss, but also may affect its service life; therefore, when the climate temperature change in the application area is smaller, the rotation cylinder 6 can be adjusted so that the fixed convex 11 cooperates with the more inner limiting strip 12, and then the elastic deformation degree of the elastic piece 9 becomes smaller. Under the elastic action, the tendency of the elastic piece 9 to drive the first rotating ring 7 and the second rotating ring 8 to move away from each other and the tendency of reverse rotation will be correspondingly reduced. This smaller tendency can not only ensure that there is sufficient connection firmness between the fixed convex 11 and the outer wall of the limiting strip 12, maintain the connection strength between the cover plate 4 and the base 1 to cope with the temperature change within the normal range, but also avoid the building waterproof expansion joint being in an unnecessary high-load state for a long time, thereby effectively extending its service life and realizing the rational use of resources and the maximization of economic benefits.

[0055] In some other embodiments, during the actual use of the building waterproof expansion joint, although the water stop belt 3 undertakes the key responsibility of preventing water penetration, in the complex natural environment and long-term use process, a certain amount of water will inevitably accumulate on the water stop belt 3. The existence of the accumulated water may cause many problems. For example, the accumulated water may cause continuous soaking and erosion of the water stop belt 3, accelerate the aging and damage of the material of the water stop belt 3, and then reduce its waterproof performance; the accumulated water may also expand due to freezing when the temperature changes, generating additional stress on the surrounding building structure and threatening the structural stability. To solve this problem, the building waterproof expansion joint is further provided with a pumping assembly 13, and the pumping assembly 13 is configured to be able to pump out the water accumulated on the water stop belt 3. In this way, during actual use, the water accumulated on the water stop belt 3 can be pumped out by the pumping assembly 13 to ensure the service life of the water stop belt 3.

[0056] Furthermore, both ends of the rotation cylinder 6 are open; the pumping assembly 13 is provided to include a sealing plug 1301, a conduit 1302, and a plurality of elastic valves 1303. The sealing plug 1301 plugs the end of the rotation cylinder 6 far from the water stop belt 3; the conduit 1302 is inserted into the rotation cylinder 6, and can not only rotate relative to the first rotating ring 7, but also slide synchronously with the first rotating ring 7 along the axial direction of the rotation cylinder 6; a plurality of elastic valves 1303 are all arranged on the inner peripheral wall of the conduit 1302, and are arranged circumferentially, and have a closed state and an open state. When in the closed state, the plurality of elastic valves 1303 divide the interior of the conduit 1302 into two non-communicating chambers along the axial direction.

[0057] Specifically in this embodiment, the sealing plug 1301 can be plugged at the top of the rotating cylinder 6 in an interference fit manner to ensure that rainwater cannot enter the water stop 3 through the rotating cylinder 6 in case of rain, and to avoid accelerating the accumulation rate of water on the water stop 3 due to the open structure of the rotating cylinder 6; the conduit 1302 is coaxially inserted into the rotating cylinder 6 during installation; to facilitate the realization that the conduit 1302 can rotate relative to the first rotating ring 7 and can also slide synchronously with the first rotating ring 7 along the axial direction of the rotating cylinder 6, it is arranged that a sliding groove 601 is provided on the circumferential side wall of the rotating cylinder 6, and the sliding groove 601 extends along the axial direction of the rotating cylinder 6; a ring groove 701 is coaxially provided on the inner peripheral wall of the first rotating ring 7; a guiding protrusion 13021 is provided on the outer peripheral wall of the conduit 1302, and the guiding protrusion 13021 extends along the radial direction of the conduit 1302 and is simultaneously slidably inserted into both the sliding groove 601 and the ring groove 701. On the one hand, it ensures that when the rotating cylinder 6 rotates, the rotating cylinder 6 can drive the conduit 1302 to rotate synchronously under the cooperation of the guiding protrusion 13021 and the sliding groove 601, and the conduit 1302 can rotate relative to the first rotating ring 7 under the cooperation of the guiding protrusion 13021 and the ring groove 701; on the other hand, it ensures that when the first rotating ring 7 moves axially, the conduit 1302 can synchronously follow the first rotating ring 7 to move axially under the cooperation of the guiding protrusion 13021 and the ring groove 701, and the conduit 1302 can move axially relative to the rotating cylinder 6 under the cooperation of the guiding protrusion 13021 and the sliding groove 601; when the multiple elastic valves 1303 are in the closed state, they form a hemispherical structure with the opening facing downward.

[0058] Initially, inside the rotating cylinder 6, there is a certain level of water below the elastic valves 1303; the multiple elastic valves 1303 are in the closed state.

[0059] When water needs to be drained, the sealing plug 1301 is opened. During the process of the first rotating ring 7 moving downward, the first rotating ring 7 synchronously drives the conduit 1302 and the elastic valves 1303 to move downward through the plug-in fit between the guiding protrusion 13021 and the ring groove 701. The volume of the chamber between the elastic valves 1303 and the water surface in the rotating cylinder 6 decreases, causing the air to be compressed and the pressure to increase; as the elastic valves 1303 move, when the pressure difference on both sides of the multiple elastic valves 1303 reaches a certain degree, the multiple elastic valves 1303 switch from the closed state to the open state under the action of the pressure difference; due to the hysteresis of the closing of the multiple elastic valves 1303 under the elastic action, when the elastic valves 1303 move below the water surface in the rotating cylinder 6, the multiple elastic valves 1303 switch from the open state to the closed state, so as to be able to hold a part of the water.

[0060] During the upward movement of the first rotating ring 7, the first rotating ring 7 synchronously drives the catheter 1302 and the elastic valve 1303 to move upward through the insertion fit between the guiding convex 13021 and the annular groove 701. Multiple elastic valves 1303 synchronously drive the received water to move upward, and then the water can be sucked out through a water-absorbing member such as a sponge.

[0061] Further, for facilitating the insertion of the guiding convex 13021 into the annular groove 701, the first rotating ring 7 is axially divided into two split rings, the annular groove 701 is formed between the two split rings, and the two split rings can be fixedly connected together by bolts.

[0062] For facilitating the installation of multiple elastic valves 1303, as Figure 8 shown, the catheter 1302 is axially divided into two sub-catheters, the two sub-catheters form a threaded fit, third annular platforms 13022 are provided on the inner peripheral wall of the bottom of the upper sub-catheter and the inner peripheral wall of the top of the lower sub-catheter, a supporting arc piece 13031 is provided at the bottom of the elastic valve 1303, the supporting arc piece 13031 is a sector ring structure, and is clamped between the two third annular platforms 13022 during installation. After the installation of the elastic valves 1303 is completed, all the supporting arc pieces 13031 form an annular structure.

[0063] For facilitating the installation of the catheter 1302 and multiple elastic valves 1303, the rotating cylinder 6 is axially divided into two split cylinders at the position where the sliding groove 601 is located, both of the two split cylinders have a part of the sliding groove 601, the first annular platform 602 is provided on the upper split cylinder, and the external thread is provided on the lower split cylinder; for facilitating the connection of the two split cylinders, a fourth annular platform 604 is fixedly sleeved on the outer peripheral wall of the bottom of the upper split cylinder, a fifth annular platform 605 is fixedly sleeved on the outer peripheral wall of the top of the lower split cylinder, and the fourth annular platform 604 and the fifth annular platform 605 are fixedly connected by bolts during installation.

[0064] For facilitating the installation of the first rotating ring 7, the second annular platform 603 is radially divided into two semi-circular structures.

[0065] During the assembly process, first, the first rotating ring 7 is sleeved on the rotating cylinder 6, then the second rotating ring 8 is threadedly sleeved on the lower split cylinder of the rotating cylinder 6, and then the second rotating ring 8 is rotated so that the second rotating ring 8 rotates and moves upward until it reaches the top limit position of the external thread; during the rotation of the second rotating ring 8, the second rotating ring 8 synchronously drives the first rotating ring 7 to rotate and move upward through the elastic piece 9; then the two semi-circular structures are spliced into a complete second annular platform 603 and fixedly sleeved at the top limit position of the external thread.

[0066] Next, multiple elastic valves 1303 are arranged circumferentially and placed on the top of the branch pipe below the catheter 1302 in a manner such that the supporting arc piece 13031 is placed on the top of the third ring platform 13022 on the branch pipe below the catheter 1302, and then the branch pipe above the catheter 1302 is threadedly engaged with the branch pipe below the catheter 1302, so that the two third ring platforms 13022 can clamp the supporting arc piece 13031 to fix the multiple elastic valves 1303.

[0067] Then, the guide tube 1302 is inserted from top to bottom into the sub-drum at the bottom of the rotating drum 6 in a manner that the guide protrusion 13021 and the slide groove 601 are aligned, and then the two sub-rings of the first rotating ring 7 are fixed together by bolts so that the guide protrusion 13021 is inserted into the ring groove 701 at the same time; then, the sub-drum at the top of the rotating drum 6 is inserted from top to bottom on the cover plate 4; then, the two sub-drums of the rotating drum 6 are connected together by bolts, thereby realizing the assembly of the cover plate 4 and all the components thereon.

[0068] In a further embodiment, there are multiple guide protrusions 13021, which are arranged along the circumferential direction; the number of the slide grooves 601 is equal to the number of the guide protrusions 13021, and are arranged correspondingly.

[0069] Specifically in this embodiment, the number of guide protrusions 13021 can be two, and they are symmetrically arranged; the number of slide grooves 601 is correspondingly two, and they are symmetrically arranged. In this way, when the rotating cylinder 6 drives the conduit 1302 to rotate and the conduit 1302 moves axially with the first rotating ring 7, the two guide protrusions 13021 cooperate with the two slide grooves 601 respectively, so that the conduit 1302 is subjected to more uniform force, avoiding jamming or damage caused by uneven force, thereby ensuring the stability and smoothness of the operation of the pumping assembly 13.

[0070] In other embodiments, the elastic valve 1303 is made of a rubber material.

[0071] Specifically, the rubber material has good elasticity and flexibility, which enables the elastic valve 1303 to flexibly switch between a closed state and an open state when subjected to changes in water pressure; at the same time, the rubber material also has a certain degree of corrosion resistance, and can maintain good performance in an environment of long-term contact with water, effectively extending the service life of the elastic valve 1303 and ensuring the long-term stable operation of the pumping component 13.

[0072] In other embodiments, the sealing plug 1301 is threadedly inserted into the rotating cylinder 6 .

[0073] Specifically, compared with the interference fit plugging method, the threaded inserted sealing plug 1301 has higher sealing performance and convenience; through threaded connection, the sealing plug 1301 can closely fit with the end of the rotating cylinder 6, effectively preventing external moisture such as rainwater from entering the waterstop 3 area through the rotating cylinder 6, and further improving the waterproof performance of the waterproof expansion joint.

[0074] In addition, the threaded insertion method makes the sealing plug 1301 easier to disassemble and install when it needs to be opened for pumping operation. The operator only needs to rotate the sealing plug 1301 to easily achieve the opening and closing operations, improving the convenience of maintenance and use, and reducing the operation time and labor costs.

[0075] In some other embodiments, the elastic member is provided as an elastic rubber strip 5, and both ends of the elastic rubber strip 5 are fixedly provided on the base 1 and the cover plate 4 respectively.

[0076] Specifically in this embodiment, for the convenience of installing the elastic rubber strip 5, as Figure 2 shown, on both sides of the cover plate 4 along the width direction of the expansion joint, there are provided U-shaped first clamping portions 401, and on the outer top of the base 1, there is provided a U-shaped second clamping portion 101. When installing the elastic rubber strip 5, both sides are respectively inserted into the first clamping portion 401 and the second clamping portion 101 on the same side.

[0077] In some other embodiments, the elastic sheet 9 is made of stainless steel material.

[0078] Specifically, the stainless steel material has many characteristics suitable for making the elastic sheet 9. First of all, stainless steel has relatively high strength and hardness, which enables the made elastic sheet 9 to withstand large external forces without being easily deformed or damaged; during the actual operation of the building waterproof expansion joint, the elastic sheet 9 needs to frequently experience the acting forces brought by the expansion and contraction of the building 2 caused by temperature changes. With its high strength, the stainless steel elastic sheet 9 can maintain its structural integrity during long-term repeated stress, ensuring that the elastic sheet 9 stably performs its functions of connecting the first rotating ring 7 and the second rotating ring 8 and providing elastic restoring force.

[0079] Secondly, stainless steel has excellent corrosion resistance; in the building environment, the elastic sheet 9 may come into contact with rainwater, moisture and various corrosive media; the stainless steel material can effectively resist the erosion of these external factors, avoiding problems such as rust and corrosion of the elastic sheet 9, thus greatly prolonging the service life of the elastic sheet 9, reducing the frequency of maintenance and replacement, and lowering the overall use cost; for example, in areas with high humidity or buildings exposed to the outdoors for a long time, the stainless steel elastic sheet 9 can always maintain good performance and will not affect the normal operation of the waterproof expansion joint due to corrosion.

[0080] Furthermore, the elastic stability of the stainless steel material is relatively good; during the operation of the elastic sheet 9, it needs to continuously undergo elastic deformation and return to its original state. The elastic stability of the stainless steel ensures that during the long-term cyclic deformation process of the elastic sheet 9, its elastic coefficient always remains within a relatively stable range. This means that the elastic sheet 9 can continuously provide a stable and reliable elastic force for the first rotating ring 7 and the second rotating ring 8. On the one hand, it can maintain the stable connection firmness between the fixed convex 11 and the outer sidewall of the limiting strip 12. On the other hand, it ensures that through the threaded fit between the second rotating ring 8 and the rotating cylinder 6, the cover plate 4 is continuously driven to closely fit the base 1, ensuring that the building waterproof expansion joint can operate efficiently and stably under various environmental conditions.

[0081] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0082] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A waterproof expansion joint for construction, characterized in that: The waterproof expansion joint for construction comprises two bases, which are respectively fixedly arranged on the buildings on both sides of the expansion joint; a water stop strip is commonly clamped between the two bases and the buildings on both sides of the expansion joint; a cover plate is commonly arranged on the two bases, the plate surface of the cover plate is perpendicular to the depth direction of the expansion joint, and the two sides of the cover plate are respectively connected to the two bases through elastic members; a rotating cylinder is vertically arranged on the cover plate, the rotating cylinder and the cover plate form a stop fit, and can rotate around its own axis; a first rotating ring is movably sleeved on the rotating cylinder; a second rotating ring is threadedly sleeved on the rotating cylinder, and the second rotating ring can synchronously move with the rotating cylinder when in use Rotation, the second rotating ring is arranged farther away from the cover plate than the first rotating ring, and a plurality of elastic sheets are connected circumferentially between the first rotating ring and the second rotating ring; two rotating arms are symmetrically arranged on the first rotating ring, and the rotating arms extend along the radial direction of the first rotating ring, and each of the rotating arms is provided with a fixing protrusion; a limiting strip is arranged on each of the bases, and the limiting strip extends along the length direction of the expansion joint, and the inner side wall of the limiting strip can form a stop fit with the rotating arm and the fixing protrusion, and the outer side wall of the limiting strip can form a stop fit with the fixing protrusion; the distance between the two limiting strips is smaller than the distance between the outer ends of the two rotating arms.

2. The waterproof expansion joint for construction according to claim 1, characterized in that: There are multiple limit strips, and the multiple limit strips are arranged at intervals along the width direction of the expansion joint; from inside to outside, the thickness of the limit strips on the same base along the depth direction of the expansion joint increases successively; the distance between the two outermost limit strips on the two bases is smaller than the distance between the outer ends of the two rotating arms.

3. The waterproof expansion joint for construction according to claim 1, characterized in that: The waterproof expansion joint for construction also includes a pumping assembly, which is configured to pump out water accumulated on the water stop strip.

4. The waterproof expansion joint for construction according to claim 3, characterized in that: Both ends of the rotating cylinder are open; the pumping assembly includes a sealing plug, a catheter and a plurality of elastic valves, and the sealing plug seals the end of the rotating cylinder away from the water stop belt; the catheter is inserted in the rotating cylinder, and can rotate relative to the first rotating ring, and can slide synchronously with the first rotating ring along the axial direction of the rotating cylinder; the plurality of elastic valves are all arranged on the inner circumferential wall of the catheter, and are arranged along the circumferential direction, and have a closed state and an open state. When in the closed state, the plurality of elastic valves separate the inside of the catheter into two non-connected chambers along the axial direction.

5. The waterproof expansion joint for construction according to claim 4, characterized in that: A slide groove is arranged on the circumferential side wall of the rotating cylinder, and the slide groove extends along the axial direction of the rotating cylinder; an annular groove is coaxially arranged on the inner circumferential wall of the first rotating ring; a guide protrusion is arranged on the outer circumferential wall of the conduit, and the guide protrusion extends along the radial direction of the conduit and is slidably inserted in the slide groove and the annular groove at the same time.

6. The waterproof expansion joint for construction according to claim 5, characterized in that: There are multiple guide protrusions, which are arranged along the circumferential direction; the number of the slide grooves is equal to the number of the guide protrusions, and are arranged correspondingly.

7. The waterproof expansion joint for construction according to claim 4, characterized in that: The elastic valve is made of rubber material.

8. The waterproof expansion joint for construction according to claim 4, characterized in that: The sealing plug is threadably inserted on the rotating cylinder.

9. The waterproof expansion joint for construction according to claim 1, characterized in that: The elastic member is an elastic rubber strip, and two ends of the elastic rubber strip are respectively fixedly arranged on the base and the cover plate.

10. The waterproof expansion joint for construction according to claim 1, characterized in that: The spring piece is made of stainless steel.

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