Prestressed steel strand tensioning device
By introducing protective side plates and straightening guide components into the prestressed tensioning device, the safety hazards and instability problems during construction were solved, the safety and stability of the construction process were achieved, and the construction efficiency was improved.
Patent Information
- Application Number
- CN202520174632.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-26
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-01-26
AI Technical Summary
Existing prestressed tensioning equipment has safety hazards and instability during construction, especially due to the lack of protective structures and straightening and guiding functions, which leads to the risk of injury to construction workers and instability in the tensioning process.
A prestressed steel strand tensioning device was designed. By setting protective side plates and straightening guide components on both sides of the jack, straightening and guiding are achieved by using constraint guide sleeves and guide ribs. The position and angle of the constraint guide sleeves are adjusted by adjusting studs and locking nuts to ensure the stability and safety of the jack.
It effectively eliminated potential safety hazards during construction, ensured the stability and safety of the tensioning process, and improved the flexibility and efficiency of construction.
Smart Images
Figure CN223824616U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of prestressed steel strand tensioning auxiliary components, specifically to a prestressed steel strand tensioning device. Background Technology
[0002] Prestressing is the process of applying prestress to the steel strands in a tension module of an engineering structure before it bears external loads. This improves the bending resistance and stiffness of the structure, delays the onset of cracks, and increases its durability. Currently, commonly used prestressing tensioning equipment consists primarily of an electric hydraulic pump, tensioning jacks, and related accessories. During tensioning, the electric hydraulic pump supplies oil to the tensioning jacks. The jack piston drives the anchor, causing the steel strands to elongate and apply prestress to the beam. The load on the steel strands is calculated using the pressure reading on the pump, and the elongation of the steel strands is calculated by measuring the piston stroke of the jacks with a steel ruler.
[0003] However, in actual construction operations, although construction workers are required to stand on both sides of the jack to carry out construction operations, the lack of protective structures on both sides of the jack still poses a safety hazard. If the steel strand breaks, there is still a possibility of injuring workers. At the same time, due to the lack of a straightening and guiding function for the jack, the jack is usually directly inserted at an angle into the foundation surface for use, which leads to instability during the tensioning process. Utility Model Content
[0004] The purpose of this utility model is to provide a prestressed steel strand tensioning device to solve the above-mentioned problems. By allowing the rear periphery of the jack body to pass through the inner circumference of the constraint guide sleeve with a gap fit, the constraint guide sleeve can be used to straighten and guide the tensioning process of the jack body. At the same time, since multiple axially arranged guide ribs are evenly distributed and fixed on the inner circumference of the constraint guide sleeve, and the outer surface of the guide ribs are all arc surfaces, the actual contact area with the jack body can be reduced by allowing the guide ribs to directly contact the periphery of the jack body, thereby ensuring that the extension movement of the jack body will not be interfered with. See the following description for details.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] This utility model provides a prestressed steel strand tensioning device, including a base plate, a jack body and a steel strand body. The base plate is arranged horizontally along the longitudinal direction. An opening for passing objects is opened at the front of the bottom of the base plate, and the front of the jack body, which is inclined downward, passes through the opening for passing objects. At the same time, the steel strand body passes through the jack body coaxially. Protective side plates are fixedly connected to both sides of the top surface of the base plate along the longitudinal direction, and both sides of the jack body are completely covered by the protective side plates.
[0007] A straightening and guiding component is assembled between the rear parts of the protective side plates on both sides to straighten and guide the jack body during tensioning.
[0008] Preferably, the rear end face of the passage opening is a ramp-shaped support surface, and the lower end of the jack body is supported by the support surface.
[0009] Preferably, a hydraulic pipeline for connecting an external oil pump is installed on the rear end face of the jack body at a position next to the steel strand body.
[0010] Preferably, counterweights for increasing the weight are installed on both sides of the top front of the base plate.
[0011] Preferably, the straightening guide assembly includes a constraint guide sleeve, adjusting studs, and guide grooves. The inner circumference of the constraint guide sleeve is fitted around the telescopic portion at the rear of the jack body in a coaxial clearance fit. Both sides of the constraint guide sleeve are fixedly installed with adjusting studs arranged laterally via connecting sleeves. The rear of the protective side plates on both sides are vertically provided with guide grooves. The guide grooves are all through grooves in the horizontal direction. The adjusting studs slide through the guide grooves on the corresponding sides. The portion of the adjusting studs on both sides between the connecting sleeve and the inner side of the guide groove is coaxially fixed with a limiting collar. The limiting collar is in close contact with the inner surface of the corresponding protective side plate. At the same time, the portion of the adjusting studs on both sides extending outward from the corresponding guide groove is coaxially engaged with a locking nut.
[0012] Preferably, the outer ends of the adjusting studs on both sides, which are far apart from each other, are coaxially fitted with handles for easy gripping.
[0013] Preferably, the portion of the adjusting stud between the locking nut and the outer side of the guide groove is coaxially slidably fitted with an anti-loosening washer, and the outer diameter of the anti-loosening washer is larger than the longitudinal groove width of the guide groove.
[0014] Preferably, the guide grooves are all waist-shaped long grooves with open tops and vertical openings, and the outer diameters of the limiting collar and the locking nut are both greater than the longitudinal groove width of the guide groove.
[0015] Preferably, the inner circumference of the constraint guide sleeve is fixed with multiple guide ribs arranged axially, and the outer surface of the guide ribs is a circular arc surface.
[0016] Using the aforementioned prestressed steel strand tensioning device, specifically in the construction and use of the steel strand body, since the passage opening is provided at the front of the bottom of the base plate, and the rear end of the passage opening is a sloping support surface, the jack body can be smoothly positioned at the tensioning construction position by tilting it through the passage opening and having its lower end supported by the support surface. Simultaneously, the protective side plates, vertically fixed to both sides of the base plate, are respectively installed around the jack body on both sides, isolating and protecting the jack body from danger, ensuring that construction personnel standing on either side of the jack body will not encounter any hazards during construction, thus eliminating construction safety risks. Furthermore, since the straightening guide assembly is combined between the rear parts of the protective side plates on both sides, the rear periphery of the jack body passes through the inner circumference of the constraint guide sleeve with a clearance fit, allowing the constraint guide sleeve to be used for tensioning the jack body. The process involves straightening and guiding the jack. Simultaneously, multiple axially arranged guide ribs are evenly distributed and fixed on the inner circumference of the constraint guide sleeve, and the outer surfaces of these guide ribs are all arc-shaped. By allowing the guide ribs to directly contact the outer periphery of the jack body, the actual contact area with the jack body is reduced, ensuring that the extension movement of the jack body is not interfered with, thus avoiding affecting the smooth completion of the tensioning operation of the steel strand. Furthermore, the vertical position of the constraint guide sleeve can be adjusted by sliding the adjusting stud vertically along the guide groove and tightening the locking nut. Simultaneously, the pitch angle of the constraint guide sleeve can be adjusted by rotating the constraint guide sleeve with the adjusting stud and tightening the locking nut. The adjustment of the position and pitch angle of the constraint guide sleeve is simple and easy to implement, facilitating the adjustment of the constraint guide sleeve to allow the rear of the jack body to pass through axially according to actual usage needs, thus improving the flexibility of the straightening and guiding assembly.
[0017] The beneficial effects are as follows: 1. The present invention has an opening for passing objects at the front of the bottom of the base plate, and the rear end of the opening is a sloping support surface. By allowing the jack body to pass through the opening at an angle and the lower end of the jack body to be supported by the support surface, the jack body can be smoothly set in the tensioning construction position. At the same time, by setting the protective side plates that are vertically fixed on both sides of the base plate on the outer periphery of the jack body, the two sides of the jack body can be isolated and protected, ensuring that the construction personnel will not be in danger when standing on the two sides of the jack body to carry out construction, thus eliminating construction safety hazards.
[0018] 2. A straightening and guiding component is assembled between the rear of the protective side plates on both sides. By allowing the rear periphery of the jack body to pass through the inner circumference of the constraint guide sleeve with a gap fit, the constraint guide sleeve can be used to straighten and guide the tensioning process of the jack body. At the same time, since multiple axially arranged guide ribs are evenly distributed and fixed on the inner circumference of the constraint guide sleeve, and the outer surface of the guide ribs are all arc surfaces, the actual contact area with the jack body can be reduced by allowing the guide ribs to directly contact the periphery of the jack body. This ensures that the extension movement of the jack body will not be interfered with, thus avoiding affecting the smooth completion of the tensioning operation of the steel strand body.
[0019] 3. The vertical position and height of the constraint guide sleeve can be adjusted by adjusting the stud to slide vertically along the guide groove and tightening the lock nut. At the same time, the pitch angle of the constraint guide sleeve can be adjusted by adjusting the stud to rotate the constraint guide sleeve and tightening the lock nut. The adjustment of the position and height and pitch angle of the constraint guide sleeve is simple and easy to implement. This makes it easy to adjust the constraint guide sleeve to allow the rear of the jack body to pass through axially according to actual use needs, thus improving the flexibility of the straightening guide assembly. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is an overall isometric schematic diagram of this utility model. Figure 1 ;
[0022] Figure 2 This is an overall isometric schematic diagram of this utility model. Figure 2 ;
[0023] Figure 3 This is a utility model Figure 1 Cross-section diagram Figure 1 ;
[0024] Figure 4 This is a utility model Figure 1 Cross-section diagram Figure 2 ;
[0025] Figure 5 This is a utility model Figure 1 A frontal view diagram;
[0026] Figure 6 This is a utility model Figure 1Rear view diagram;
[0027] Figure 7 This is a utility model Figure 1 A left-view diagram;
[0028] Figure 8 This is a utility model Figure 1 A top-down view.
[0029] The annotations in the attached figures are explained as follows:
[0030] 1. Protective side plate; 2. Straightening guide assembly; 201. Guide groove; 202. Anti-loosening washer; 203. Handle; 204. Adjusting stud; 205. Locking nut; 206. Limiting collar; 207. Restraining guide sleeve; 208. Connecting sleeve; 209. Guide rib; 3. Counterweight block; 4. Base plate; 401. Passage opening; 402. Support surface; 5. Jack body; 501. Hydraulic pipeline; 6. Steel strand body. Detailed Implementation
[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0032] See Figures 1-8 As shown, this utility model provides a prestressed steel strand tensioning device, including a base plate 4, a jack body 5, and a steel strand body 6. The base plate 4 is arranged horizontally along the longitudinal direction. An opening 401 is opened at the front of the bottom of the base plate 4, and the front of the jack body 5, which is inclined downward, passes through the opening 401. At the same time, the steel strand body 6 coaxially passes through the jack body 5. Protective side plates 1 are vertically extended and fixed to both sides of the top surface of the base plate 4 along the longitudinal direction. Both sides of the jack body 5 are completely covered by the protective side plates 1. The purpose of this arrangement is that, firstly, by allowing the jack body 5 to pass through the opening 401 at an incline and with its lower end supported by the support surface 402, the jack body 5 can be smoothly placed in the tensioning construction position. At the same time, by the protective side plates 1 vertically fixed to both sides of the base plate 4, the two sides of the jack body 5 can be isolated and protected, ensuring that the construction personnel will not be in danger when working on both sides of the jack body 5.
[0033] See Figures 1-4As shown, a straightening and guiding assembly 2 is assembled between the rear parts of the protective side plates 1 on both sides. This assembly is used to straighten and guide the jack body 5 during tensioning. Specifically, the straightening and guiding assembly 2 includes a constraint guide sleeve 207, adjusting studs 204, and a guide groove 201. The inner circumference of the constraint guide sleeve 207 is fitted coaxially with a clearance fit around the telescopic portion at the rear of the jack body 5. Adjusting studs 204, arranged laterally, are fixedly installed on both sides of the constraint guide sleeve 207 via connecting sleeves 208. Guide grooves 201 are vertically formed at the rear of the protective side plates 1 on both sides. These guide grooves 201 are through grooves in the horizontal direction, and the adjusting studs 204 slide through the corresponding side guide grooves 201. Limiting rings 2 are coaxially fixed to the portions of the adjusting studs 204 between the corresponding connecting sleeves 208 and the guide grooves 201 on both sides. 06, and the limiting collars 206 are all in close contact with the inner surface of the corresponding protective side plate 1. At the same time, the adjusting studs 204 on both sides are coaxially engaged with locking nuts 205 on the parts that extend out of the corresponding guide grooves 201. The purpose of this setting is that, firstly, by allowing the rear periphery of the jack body 5 to pass through the inner periphery of the constraint guide sleeve 207 with a clearance fit, the constraint guide sleeve 207 can be used to straighten and guide the tensioning process of the jack body 5. At the same time, by adjusting the studs 204 vertically sliding along the guide groove 201 and tightening the locking nuts 205, the vertical position height of the constraint guide sleeve 207 can be adjusted. By adjusting the studs 204 to drive the constraint guide sleeve 207 to rotate and by tightening the locking nuts 205, the pitch angle of the constraint guide sleeve 207 can be adjusted. The adjustment of the position height and pitch angle of the constraint guide sleeve 207 is simple and easy to implement.
[0034] See Figures 1-8 As shown, the base plate 4, jack body 5, and straightening guide assembly 2 have been optimized as follows: Specifically, the rear end face of the passage opening 401 of the base plate 4 and jack body 5 is a ramp-shaped support surface 402, and the lower end of the jack body 5 is supported by the support surface 402, so as to provide good and stable support for the lower end of the jack body 5. Optionally, a hydraulic pipeline 501 is installed on the rear end face of the jack body 5 next to the steel strand body 6, so as to allow the jack body 5 to be smoothly connected to an external oil pump. Furthermore, counterweights 3 are installed on both sides of the front top of the base plate 4 to increase its own weight, thereby increasing the overall weight of the base plate 4 and improving its stability during use.
[0035] See Figures 1-8As shown, specifically in the centering guide assembly 2, the outer ends of the adjusting studs 204 on both sides, which are far apart from each other, are coaxially fitted with handles 203 for easy gripping. This allows the adjusting studs 204 to slide vertically and rotate circumferentially along the guide groove 201 by applying force through the handles 203. Optionally, anti-loosening washers 202 are coaxially slidably fitted on the portion of the adjusting studs 204 between the corresponding locking nut 205 and the outer side of the guide groove 201. The outer diameter of the anti-loosening washers 202 is larger than the longitudinal groove width of the guide groove 201. This arrangement facilitates the improvement of stability after locking by pressing the anti-loosening washers 202 with the locking nut 205. All guide grooves 201 are long, waist-shaped grooves with open tops and vertical openings. The outer diameters of the limiting collar 206 and the locking nut 205 are larger than the longitudinal width of the guide groove 201. This design allows the adjusting stud 204 to have a sufficiently wide vertical height adjustment range. It also facilitates the smooth assembly and disassembly of the guide groove 201 by allowing the adjusting stud 204 to slide in and out of the top of the guide groove 201. Multiple axially arranged guide ribs 209 are evenly distributed and fixed on the inner circumference of the constraint guide sleeve 207. The outer surfaces of the guide ribs 209 are all arc-shaped. This design reduces the actual contact area with the jack body 5 by allowing the guide ribs 209 to directly contact the outer periphery of the jack body 5, thus ensuring that they do not interfere with the extension movement of the jack body 5 and avoid affecting the smooth completion of the tensioning operation of the steel strand body 6.
[0036] Using the above structure, specifically in the construction and use of the steel strand body 6, since an opening 401 for passing objects is opened at the front of the bottom of the base plate 4, and the rear end of the opening 401 is a sloping support surface 402, the jack body 5 can be smoothly positioned at the tensioning construction position by tilting it through the opening 401 and having its lower end supported by the support surface 402. Simultaneously, the protective side plates 1, vertically fixed to both sides of the base plate 4, are respectively installed on the outer periphery of the jack body 5 on both sides, providing isolation and protection for the jack body 5 on both sides, ensuring that construction personnel will not be in danger while working on both sides of the jack body 5, thus eliminating construction safety hazards. Furthermore, since a straightening guide component 2 is combined between the rear parts of the protective side plates 1 on both sides, the rear periphery of the jack body 5 passes through the inner periphery of the constraint guide sleeve 207 with a gap fit, the constraint guide sleeve 207 can be used to straighten and guide the jack body 5 during tensioning. Multiple axially arranged guide ribs 209 are evenly distributed and fixed on the inner circumference of the constraint guide sleeve 207, and the outer surface of the guide ribs 209 is an arc surface. By allowing the guide ribs 209 to directly contact the outer periphery of the jack body 5, the actual contact area with the jack body 5 can be reduced, thereby ensuring that it will not interfere with the extension movement of the jack body 5 and avoid affecting the smooth completion of the tensioning operation of the steel strand body 6. The vertical position height of the constraint guide sleeve 207 can be adjusted by adjusting the stud 204 to slide vertically along the guide groove 201 and tightening the locking nut 205. At the same time, the pitch angle of the constraint guide sleeve 207 can be adjusted by adjusting the stud 204 to rotate the constraint guide sleeve 207 and tightening the locking nut 205. The adjustment of the position height and pitch angle of the constraint guide sleeve 207 is simple and easy to implement, and it is convenient to adjust the constraint guide sleeve 207 to allow the rear of the jack body 5 to pass through axially according to actual use needs, thus improving the flexibility of the use of the straightening guide assembly 2.
[0037] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A prestressed steel strand tensioning device, comprising a base plate (4), a jack body (5), and a steel strand body (6), characterized in that: The base plate (4) is laid flat along the longitudinal direction. An opening (401) is opened at the front of the bottom of the base plate (4). The front of the jack body (5) is inclined downward and passes through the opening (401). At the same time, the steel strand body (6) passes through the jack body (5) coaxially. Both sides of the top surface of the base plate (4) are vertically extended and fixed with protective side plates (1). Both sides of the jack body (5) are completely covered by the protective side plates (1). A straightening and guiding component (2) is provided between the rear parts of the protective side plates (1) on both sides, which is used to straighten and guide the jack body (5) during the tensioning process.
2. The prestressed steel strand tensioning device according to claim 1, characterized in that: The rear end face of the passage opening (401) is a ramp-shaped support surface (402), and the lower end of the jack body (5) is supported by the support surface (402).
3. The prestressed steel strand tensioning device according to claim 1, characterized in that: The rear end face of the jack body (5) is equipped with a hydraulic pipeline (501) for connecting to an external oil pump device at a position next to the steel strand body (6).
4. The prestressed steel strand tensioning device according to claim 1, characterized in that: The top front sides of the base plate (4) are equipped with counterweights (3) to increase its own weight.
5. A prestressed steel strand tensioning device according to any one of claims 1-4, characterized in that: The straightening guide assembly (2) includes a constraint guide sleeve (207), an adjusting stud (204), and a guide groove (201). The inner circumference of the constraint guide sleeve (207) is fitted around the telescopic portion at the rear of the jack body (5) with a coaxial clearance fit. The adjusting stud (204) is fixedly installed on both sides of the constraint guide sleeve (207) via a connecting sleeve (208). Guide grooves (201) are vertically opened at the rear of the protective side plates (1) on both sides. These guide grooves (201) are all through grooves in the transverse direction. The adjusting studs (204) all slide through the guide grooves (201) on the corresponding side. The portion of the adjusting studs (204) on both sides between the inner side of the connecting sleeve (208) and the guide groove (201) is coaxially fixed with a limiting collar (206), and the limiting collar (206) is in close contact with the inner surface of the corresponding protective side plate (1). At the same time, the portion of the adjusting studs (204) on both sides that extends outward from the outer side of the corresponding guide groove (201) is coaxially engaged with a locking nut (205).
6. The prestressed steel strand tensioning device according to claim 5, characterized in that: The outer ends of the adjusting studs (204) on both sides, which are far apart from each other, are coaxially fitted with handles (203) for easy gripping.
7. The prestressed steel strand tensioning device according to claim 6, characterized in that: The adjusting stud (204) is coaxially slidably fitted with anti-loosening washers (202) on the portion between the locking nut (205) and the outer side of the guide groove (201), and the outer diameter of the anti-loosening washers (202) is greater than the longitudinal groove width of the guide groove (201).
8. The prestressed steel strand tensioning device according to claim 7, characterized in that: The guide grooves (201) are all waist-shaped long grooves with open tops and vertical openings, and the outer diameters of the limiting collar (206) and the locking nut (205) are both greater than the longitudinal groove width of the guide grooves (201).
9. A prestressed steel strand tensioning device according to claim 6, 7 or 8, characterized in that: The inner circumference of the constraint guide sleeve (207) is fixed with multiple guide ribs (209) arranged along the axial direction, and the outer surface of the guide ribs (209) is a circular arc surface.