A stress monitoring device for steel sheet pile cofferdams in large-scale sluice pump projects along the river
By using heat insulation pads and heat dissipation tanks in the stress monitoring device of steel sheet pile pile cofferdam, the problem of stress monitoring after welding is solved, and more accurate and reliable stress monitoring is achieved.
Patent Information
- Application Number
- CN202411887337.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-04-04
AI Technical Summary
The residual temperature of the steel bars after welding is transferred to the self-vibration steel strings in the vibrating string stress gauge, which may change its elasticity and affect the accuracy of stress monitoring.
A stress monitoring device including a vibrating stress gauge and a heat insulation pad is designed. Through the threaded connection of the butt screw and the butt screw sleeve, the heat insulation pad and the heat dissipation groove are used to cool and heat dissipate, and the heat transfer speed is slowed down.
It effectively reduces the impact of residual temperature after welding on vibrating stress meter, and improves the accuracy and reliability of stress monitoring.
Smart Images
Figure CN119754351A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of stress monitoring, and in particular relates to a steel sheet pile cofferdam stress monitoring device for a large-scale sluice pump project near a river. Background Art
[0002] In the process of monitoring stress of steel sheet pile cofferdam, usually a vibrating wire stress gauge is installed on the steel bar in the steel sheet pile to monitor the stress of the steel bar. In the process of installing the vibrating wire stress gauge, the two ends of the vibrating wire stress gauge are welded to the steel bar to keep the steel bar vibrating wire stress gauge, the steel bar rod and the stressed steel bar on the same axis. However, heat will be generated in the welding process. During the welding process, the temperature rise of the sensor part shall not exceed the specified temperature, and water cooling is required while welding. However, after the welding is completed and the water cooling is stopped, the welding point still maintains a high temperature. When directly docking, the residual heat is transmitted to the self-vibrating steel string in the vibrating wire stress gauge, which may change the elasticity of the self-vibrating steel string in the vibrating wire stress gauge, and will have an adverse effect on the stress monitoring gauge. Summary of the invention
[0003] In view of this, the present invention aims to propose a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along the river, so as to solve the technical problem that after the welding is completed and the water spraying is stopped, the welding point still maintains a relatively high temperature. When directly docking, the residual heat is transmitted to the self-vibrating steel string in the vibrating wire stress gauge, which may change the elasticity of the self-vibrating steel string in the vibrating wire stress gauge and have an adverse effect on the stress monitoring gauge.
[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:
[0005] As a technical solution, a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along the river is proposed, comprising a vibrating-wire stress gauge and connecting sleeves respectively arranged at both ends thereof, a thermal insulation pad being arranged in each connecting sleeve, and the connecting sleeve and the butt screw being connected via a butt screw sleeve, the end of the steel bar being fixedly connected to the butt screw, and the end of the butt screw being able to abut against the thermal insulation pad, and the thermal insulation pad being able to continuously cool the end of the steel bar and the butt screw.
[0006] Furthermore, the thermal insulation pad is a water-absorbing material, and the cooling liquid medium can be absorbed in the thermal insulation pad.
[0007] Furthermore, the butt screw sleeve is slidably sleeved on the surface of the vibrating-wire stress gauge and the connecting sleeve, the butt screw is inserted into the connecting sleeve, and the external thread of the butt screw is threadably connected to the butt screw sleeve, and a welding slot is opened at the end of each butt screw, which is used to be sleeved on the end of the steel bar.
[0008] Furthermore, the docking screw comprises a docking section and a threaded connection section which are integrally arranged along the axial direction, the docking section is inserted into the interior of the connecting sleeve, and the surface of the threaded connection section has an external thread.
[0009] Furthermore, the surface of the butt screw has a lap surface, and when the butt screw is threadedly connected with the two butt screw sleeves, the lap surface is overlapped on the end of the connecting sleeve.
[0010] Furthermore, a plurality of heat dissipation grooves are provided on the outer surface of the bottom end of the docking screw along the circumferential direction, and a plurality of heat dissipation holes docking with the heat dissipation grooves are provided on the surface of the docking screw sleeve.
[0011] Furthermore, the heat dissipation grooves are provided on the surfaces of the overlapping surfaces and the butting sections.
[0012] Furthermore, the heat dissipation hole is communicated with the heat dissipation groove at a position where the heat dissipation groove is opened on the overlapping surface.
[0013] Furthermore, a plurality of snap-in blocks are fixedly connected to the end of the connecting sleeve, the number of the snap-in blocks is less than the number of the heat dissipation slots, the snap-in blocks are snapped into the heat dissipation slots at the overlapping surfaces, and there is a gap between the snap-in blocks and the inner wall of the heat dissipation slots at the overlapping surfaces.
[0014] Furthermore, the vibrating-wire stress gauge includes a tube body, a partition and a branch pipe, the two ends of the tube body are respectively fixedly connected to two connecting sleeves, two butt screw sleeves are sleeved on the surface of the tube body, a vibrating wire is coaxially arranged in the tube body, and a partition is respectively arranged at the two ends of the vibrating wire, each partition is fixedly connected in the tube body, the branch pipe is fixedly connected to the surface of the tube body, and a signal transmission component is installed inside the branch pipe.
[0015] Furthermore, the signal transmission component includes a coil, a wire connector, a current line and an iron core; the coil and the iron core are fixed inside the branch pipe, a wire connector is installed at the end of the coil, and the coil is connected to the current line through the wire connector.
[0016] Compared with the prior art, the stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river described in the present invention has the following beneficial effects:
[0017] (1) The present invention discloses a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river. The butt screw sleeve and the threaded shell of the welded butt screw are detachable. When welding, the butt screw and the butt screw sleeve are first disconnected, and the welding slot of the butt screw is separately set on the end of the steel bar for welding. During the welding process, the butt screw is kept separated from the vibrating-wire stress gauge to avoid the influence of the temperature during the welding process on the vibrating-wire stress gauge. During the threaded connection process, the end of the butt screw is partially isolated from the inner wall of the butt screw sleeve by the insulation pad, which is beneficial to reducing the contact area between the butt screw and the butt screw sleeve, and is beneficial to heat-insulating the residual heat transferred from the welding point, thereby slowing down the heat transfer rate.
[0018] (2) A stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river described in the present invention. After the docking screw and the docking screw sleeve are docked, the docking screw sleeve and the docking screw are connected through the heat dissipation groove and the heat dissipation hole to connect with the external air, which is conducive to diffusing the heat inside the docking screw sleeve to the outside, which is conducive to further cooling.
[0019] (3) The present invention relates to a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river. During the docking process between the docking screw sleeve and the docking screw rod, the docking screw rod will squeeze the thermal insulation pad to squeeze out water. The squeezed water will be diffused under the drainage of the heat dissipation groove, contact the docking screw rod, absorb heat, and be discharged through the heat dissipation hole, thereby achieving rapid heat absorption and heat dissipation at the docking point between the docking screw rod and the docking screw sleeve. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:
[0021] Figure 1 It is a structural cross-sectional view of a front view of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle;
[0023] Figure 3 for Figure 1 Enlarged view of part B;
[0024] Figure 4 A structural cross-sectional view of a butt-jointed screw sleeve of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0025] Figure 5 for Figure 4 Enlarged view of part C in the middle;
[0026] Figure 6 This is a structural schematic diagram of a docking screw of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0027] Figure 7 It is a first structural schematic diagram of a butt-jointed screw sleeve of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0028] Figure 8 A second structural schematic diagram of a butt-jointed screw sleeve of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0029] Fig. 9 This is a schematic diagram of the overall structure of a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river according to an embodiment of the present invention;
[0030] Fig.10 This is a structural schematic diagram of a pipe body and a connecting sleeve of a steel sheet pile cofferdam stress monitoring device for a large-scale riverside sluice pump project according to an embodiment of the present invention.
[0031] Description of reference numerals:
[0032] 1-connecting sleeve; 2-docking screw sleeve; 3-docking screw; 301-docking section; 302-threaded connection section; 303-lap surface; 4-heat dissipation groove; 5-heat dissipation hole; 6-thermal insulation pad; 7-clamping block; 8-tube body; 9-partition; 10-vibrating wire; 11-branch pipe; 12-coil; 13-wire connector; 14-current line; 15-iron core; 16-steel bar; 17-welding slot. DETAILED DESCRIPTION
[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.
[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.
[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.
[0036] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.
[0037] like Figures 1 to 10 As shown, in one embodiment, a stress monitoring device for a steel sheet pile cofferdam of a large-scale sluice pump project along a river comprises a vibrating-wire stress gauge and two connecting sleeves 1, wherein the two connecting sleeves 1 are fixedly connected to the two ends of the vibrating-wire stress gauge, and a heat insulating pad 6 is arranged inside the connecting sleeve 1; two butt screw sleeves 2 are respectively slidably sleeved on the surfaces of the vibrating-wire stress gauge and the connecting sleeve 1; two butt screws 3 are respectively inserted into the two connecting sleeves 1, and the external threads of the two butt screws 3 are threadedly connected to the butt screw sleeves 2; two welding slots 17, wherein the two welding slots 17 are respectively opened at the ends of the two butt screws 3, and the two welding slots 17 are used to be sleeved on the ends of the steel bars 16.
[0038] It should be understood that, by the detachable assembly of the threaded shell of the butt screw sleeve 2 and the welded butt screw 3, during welding, the butt screw 3 and the butt screw sleeve 2 are first disconnected, and the welding slot 17 of the butt screw 3 is separately sleeved on the end of the steel bar 16 for welding. During the welding process, the butt screw 3 is kept separated from the vibrating wire strain gauge to avoid the influence of the temperature during the welding process on the vibrating wire strain gauge.
[0039] Then, after welding is completed, the connecting sleeves 1 at both ends of the vibrating-string strain gauge are sleeved on the ends of the two docking screws 3, and then the two docking screw sleeves 2 are screwed so that the internal threads of the two docking screw sleeves 2 are respectively connected to the external threads of the two docking screws 3. During the threaded connection process, the ends of the docking screws 3 will be partially isolated by the insulation pad 6 and the inner wall of the docking screw sleeve 2, which is beneficial to reduce the contact area between the docking screw 3 and the docking screw sleeve 2, and is beneficial to insulate the residual heat transferred from the welding point, slowing down the heat transfer speed, and during the heat conduction process, the outer surface of the docking screw sleeve 2 will directly contact the air to further dissipate the heat. The formed insulation layer can reduce heat transfer, which is beneficial to reduce the influence of residual heat on the vibrating-string strain gauge during docking after welding.
[0040] like Figure 6 As shown, in one embodiment, the docking screw 3 includes a docking section 301 and a threaded connection section 302, the docking section 301 is inserted into the interior of the connecting sleeve 1, and the surface of the threaded connection section 302 has an external thread. It should be understood that the docking section 301 is provided for docking with the connecting sleeve 1, and the threaded connection section 302 is provided for threaded connection with the docking screw sleeve 2.
[0041] like Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, the surfaces of the two docking screws 3 have a lap surface 303, and when the docking screws 3 are threadedly connected to the two docking screw sleeves 2, the lap surface 303 is lapped on the end of the connecting sleeve 1. It should be understood that during the process of the docking screws 3 being threadedly connected to the docking screw sleeves 2, the lap surface 303 will limit the relative position of the connecting sleeve 1 and the docking screws 3 to avoid excessive extrusion of the isolation pad and damage to the thermal insulation pad 6.
[0042] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, a plurality of heat dissipation grooves 4 are provided in an annular array on the outer surface of the bottom end of the docking screw 3, and a plurality of heat dissipation holes 5 are provided on the surface of the docking nut 2 to be docked with the heat dissipation grooves 4. It should be understood that after the docking screw 3 is docked with the docking nut 2, the docking nut 2 and the docking screw 3 are connected through the heat dissipation grooves 4 and the heat dissipation holes 5, and then connected with the external air, which is conducive to diffusing the heat inside the docking nut 2 to the outside, and is conducive to further cooling.
[0043] like Figure 1 and Figure 2As shown, in one embodiment, the heat insulation pad 6 is a water-absorbing material, and the heat insulation pad 6 is wetted with water before docking. It should be understood that in the process of docking the docking screw sleeve 2 and the docking screw 3, the docking screw 3 will squeeze the heat insulation pad 6 to squeeze out water, and the squeezed water will be diffused under the drainage of the heat dissipation groove 4, contact with the docking screw 3, absorb heat, and be discharged through the heat dissipation hole 5, so as to achieve rapid heat absorption and heat dissipation at the docking point of the docking screw 3 and the docking screw sleeve 2.
[0044] like Figure 6 As shown, in one embodiment, the heat dissipation grooves 4 are provided on the surfaces of the overlapping surface 303 and the butting section 301 .
[0045] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in one embodiment, the heat dissipation hole 5 is connected to the heat dissipation groove 4 at the position where the overlap surface 303 is opened.
[0046] like Figure 4 , Figure 5 and Fig.10 As shown, in one embodiment, a plurality of clamping blocks 7 are fixedly connected to the end of the connection sleeve 1, the number of the clamping blocks 7 is less than the number of the heat dissipation slots 4, the clamping blocks 7 are clamped in the heat dissipation slots 4 at the overlap surface 303, and there is a gap between the clamping blocks 7 and the inner wall of the heat dissipation slots 4 at the overlap surface 303. It should be understood that the clamping blocks 7 are provided to clamp and limit the connection between the docking screw 3 and the connection sleeve 1, and after the clamping, a gap is left between the heat dissipation slot 4 and the clamping blocks 7 to avoid blocking the heat dissipation holes 5 and the heat dissipation slots 4.
[0047] like Figure 1 , Figure 2 , Figure 3 , Fig. 9 and Fig.10 As shown, in one embodiment, the vibrating-wire stress gauge includes a tube body 8, the two ends of the tube body 8 are respectively fixedly connected to two connecting sleeves 1, and two butt screw sleeves 2 are sleeved on the surface of the tube body 8; two partitions 9 are fixedly connected in the tube body 8, and a vibrating wire 10 is fixedly connected between the two partitions 9; a branch pipe 11 is fixedly connected to the surface of the tube body 8, and a signal transmission component is installed inside. During measurement, when the stress of the steel bar 16 changes, the tube body 8 of the vibrating-wire stress gauge senses the stress and deforms, thereby driving the distance between the two partitions 9 to change, the tightness of the vibrating wire 10 will change accordingly, and the natural frequency of the vibrating wire 10 will change. According to the change in the frequency of the vibrating wire 10, the strain and stress can be indirectly measured.
[0048] like Figure 1 , Figure 2 , Figure 3 , Fig. 9 and Fig.10 As shown, in one embodiment, the signal transmission component includes a coil 12, a wire connector 13, a current line 14 and an iron core 15; the coil 12 and the iron core 15 are fixed inside the branch pipe 11, and the wire connector 13 is installed at the end of the coil 12, and the coil 12 is connected to the current line 14 through the wire connector 13. It should be understood that when a pulse current passes through the coil 12, the iron core 15 in the coil 12 will generate attraction on the vibrating string 10 to tighten the vibrating string 10. When the pulse current disappears, the vibrating string 10 is loosened and vibrates, and the generated induced current is output from the current line 14; the metal patch attached to the steel bar 16 is deformed as the steel bar 16 is stressed, and the distance between the supports of the vibrating string 10 changes, that is, the length of the vibrating string 10 changes, thereby changing the natural frequency of the vibrating string 10, and indirectly measuring the strain and stress of the steel bar 16 by measuring the induced current frequency.
[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A stress monitoring device for steel sheet pile cofferdams in a large-scale sluice pump project near a river, characterized in that: The invention comprises a vibrating-wire (10) type stress gauge and connecting sleeves (1) respectively arranged at both ends thereof, wherein a heat insulating pad (6) is arranged in each connecting sleeve (1), and the connecting sleeve (1) and the butt screw (3) are connected via a butt screw sleeve (2), the end of a steel bar (16) is fixedly connected to the butt screw (3), and the end of the butt screw (3) can abut against the heat insulating pad (6), and the heat insulating pad (6) can continuously cool the end of the steel bar (16) and the butt screw (3).
2. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 1 is characterized by: The heat insulating pad (6) is a water-absorbing material, and the heat insulating pad (6) can absorb the cooling liquid medium.
3. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 1 is characterized by: The butt screw sleeve (2) is slidably sleeved on the surface of the vibrating wire (10) type stress gauge and the connecting sleeve (1), the butt screw rod (3) is inserted into the connecting sleeve (1), and the external thread of the butt screw rod (3) is threadedly connected with the butt screw sleeve (2), and a welding slot (17) is provided at the end of each butt screw rod (3), and the welding slot (17) is used to be sleeved on the end of the steel bar (16).
4. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along a river according to claim 1 is characterized by: The docking screw (3) comprises a docking section (301) and a threaded connection section (302) which are integrally arranged along the axial direction. The docking section (301) is inserted into the interior of the connecting sleeve (1), and the surface of the threaded connection section (302) has external threads.
5. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 1 is characterized by: The surface of the butt screw (3) has a lap surface (303). When the butt screw (3) and the two butt screw sleeves (2) are threadedly connected, the lap surface (303) is lapped on the end of the connecting sleeve (1).
6. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 1 is characterized by: A plurality of heat dissipation grooves (4) are provided on the outer surface of the bottom end of the docking screw (3) along the circumferential direction, and a plurality of heat dissipation holes (5) docking with the heat dissipation grooves (4) are provided on the surface of the docking screw sleeve (2); the heat dissipation grooves (4) are provided on the surfaces of the overlapping surface (303) and the docking section (301).
7. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 6 is characterized by: The heat dissipation hole (5) is connected to the heat dissipation groove (4) at a position where the heat dissipation groove (4) is opened on the overlapping surface (303).
8. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along a river according to claim 6 is characterized by: A plurality of clamping blocks (7) are fixedly connected to the end of the connecting sleeve (1), the number of the clamping blocks (7) being less than the number of the heat dissipation slots (4), the clamping blocks (7) being clamped in the heat dissipation slots (4) at the overlapping surface (303), and a gap being provided between the clamping blocks (7) and the inner wall of the heat dissipation slot (4) at the overlapping surface (303).
9. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along a river according to claim 1, characterized in that: The vibrating wire (10) type stress gauge comprises a tube body (8), a partition (9) and a branch pipe (11), wherein the two ends of the tube body (8) are respectively fixedly connected to two connecting sleeves (1), two butt screw sleeves (2) are sleeved on the surface of the tube body (8), a vibrating wire (10) is coaxially arranged in the tube body (8), and a partition (9) is respectively arranged at the two ends of the vibrating wire (10), each partition (9) is fixedly connected in the tube body (8), the branch pipe (11) is fixedly connected to the surface of the tube body (8), and a signal transmission component is installed inside the branch pipe (11).
10. The stress monitoring device for steel sheet pile cofferdam of a large-scale sluice pump project along the river according to claim 9, characterized in that: The signal transmission component comprises a coil (12), a wire connector (13), a current line (14) and an iron core (15); the coil (12) and the iron core (15) are fixed inside a branch pipe (11), a wire connector (13) is installed at the end of the coil (12), and the coil (12) is connected to the current line (14) via the wire connector (13).