Counter-pull type prestress detector for water conservancy project

Abstract

The utility model relates to the technical field of prestress detection, in particular to a counter-pull type prestress detector for hydraulic engineering, which comprises a detection table, a lower clamping group and a detection host arranged on the detection table, a display screen and a signal line arranged on the detection host, a support column arranged on the detection table, and a top plate arranged on the support column. An oil cylinder and a first guide hole are formed in the top plate, a prestressed tendon body is clamped on the lower clamping group, a guide rod is connected in the first guide hole in a sliding mode, a movable plate is arranged on the guide rod, an upper clamping group is arranged on the movable plate, a tension sensor is arranged between the lower clamping group and the upper clamping group, and a guide sliding block and a reinforcing rib plate are arranged on the movable plate; the guide sliding block is in sliding connection with the supporting column. The vertical lifting guide stability of the moving plate is integrally improved, then the detection stability of the tensioning prestress of the prestressed tendon is guaranteed, and the structural strength between the moving plate and the telescopic rod of the oil cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prestress detection, in particular to a reverse-pull type prestress detection instrument used in water conservancy projects. Background Art

[0002] Prestressed tendons are a type of structural tendons used in water conservancy projects, mainly used to strengthen and stabilize the structure of buildings.

[0003] During installation, prestressed tendons are generally anchored in the concrete structure. In this way, when the concrete structure is subjected to external loads, the prestressed tendons are tensioned and can offset part of the load, thereby improving the bearing capacity and stability of the structure.

[0004] Before anchoring the prestressed tendons in the concrete structure, it is necessary to test the prestress of the prestressed tendons to ensure that the purchased prestressed tendons can meet the prestressing effect used in the water conservancy project. Therefore, it is necessary to use a reverse-tension prestressing detector for prestressed tendons in water conservancy projects.

[0005] At present, the reverse-pull prestress detector for prestressed tendons in existing water conservancy projects has a low upward and downward guiding stability of the movable plate, which is prone to shaking, thereby affecting the detection stability of the tensioning prestress of the prestressed tendons. In addition, the structural strength between the movable plate and the telescopic rod of the cylinder is low.

[0006] The above problems are widespread and urgently need to be improved. Utility Model Content

[0007] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose a reverse-pull prestress detector for water conservancy projects.

[0008] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A reverse-pull prestressed steel detector for water conservancy projects is designed, comprising a detection platform, a lower clamping group and a detection host are arranged on the detection platform, a display screen and a signal line are arranged on the detection host, a support column is arranged on the support column, a top plate is arranged on the top plate, a cylinder and a first guide hole are arranged on the top plate, a prestressed steel bar body is clamped on the lower clamping group, a guide rod is slidably connected in the first guide hole, a movable plate is arranged on the guide rod, an upper clamping group is arranged on the movable plate, a tension sensor is arranged between the lower clamping group and the upper clamping group, a guide slider and a reinforcement rib are arranged on the movable plate, and the guide slider is slidably connected with the support column.

[0010] Furthermore, the detection host is electrically connected to the tension sensor through a signal line, and the tension sensor is provided with a lower pull rod and an upper pull rod, respectively. The lower pull rod is fixed to the lower clamping group, and the upper pull rod is fixed to the upper clamping group.

[0011] Furthermore, a wire passing hole is provided on the support column, and the signal line is passed through the wire passing hole, and the wire passing hole is provided to be inclined toward the detection host.

[0012] Furthermore, a telescopic rod is slidably connected to the oil cylinder, the telescopic rod is fixedly arranged on the movable plate, and the number of the reinforcing ribs is four and they are arranged in a circle and are arranged between the telescopic rod and the movable plate.

[0013] Furthermore, the guide rod and the first guide hole form a group, which is four groups symmetrically arranged in total, and the top-view cross-section of the guide rod and the first guide hole is a square structure.

[0014] Furthermore, a second guide hole is provided on the guide sliding block, and the guide sliding block is slidably connected with the support column through the second guide hole.

[0015] Furthermore, guide balls are rotatably arranged in the guide sliding block, two guide balls are symmetrically arranged and in rolling contact with the outer wall of the support column, and the guide balls are made of hard alloy steel.

[0016] The utility model proposes a reverse tension prestressing detector for water conservancy projects, which has the following beneficial effects:

[0017] 1. The utility model realizes a double guiding effect by arranging four groups of vertical sliding guide structures between the top plate and the movable plate, and arranging a sliding guide structure between the movable plate and the supporting column, thereby improving the upward and downward lifting guiding stability of the movable plate as a whole, avoiding shaking, and thus ensuring the detection stability of the tensioning prestress of the prestressed tendons.

[0018] 2. The utility model improves the structural strength between the moving plate and the telescopic rod of the oil cylinder as a whole by symmetrically arranging four triangular reinforcing rib structures between the moving plate and the telescopic rod of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a vertical cross-sectional view of the overall structure of the utility model;

[0020] Figure 2 For the utility model Figure 1 A partial enlarged view of the middle part;

[0021] Figure 3 For the utility model Figure 1 View from point B in the middle;

[0022] Figure 4For the utility model Figure 1 A partial enlarged view of point C in the middle;

[0023] Figure 5 For the utility model Figure 4 Schematic diagram of the top view distribution of the middle reinforcement rib.

[0024] In the figure: 1 detection table; 10 lower clamping group; 11 detection host; 12 display screen; 13 signal line; 2 tension sensor; 21 lower pull rod; 22 upper pull rod; 3 support column; 30 wire hole; 4 moving plate; 41 upper clamping group; 42 prestressed tendon body; 43 guide rod; 5 top plate; 51 first guide hole; 6 oil cylinder; 61 telescopic rod; 62 reinforcement rib plate; 7 guide slider; 71 second guide hole; 8 guide ball. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0026] Reference Figure 1-5 A reverse pull prestressed testing instrument for water conservancy projects, comprising a testing platform 1, the testing platform 1 is provided with a lower clamping group 10 and a testing host 11, the testing host 11 is provided with a display screen 12 and a signal line 13, the testing platform 1 is provided with a support column 3, the support column 3 is provided with a top plate 5, the top plate 5 is provided with an oil cylinder 6 and a first guide hole 51, the lower clamping group 10 clamps a prestressed tendon body 42, the first guide hole 51 is slidably connected with a guide The guide rod 43 is provided with a movable plate 4, an upper clamping group 41 is provided on the movable plate 4, a tension sensor 2 is provided between the lower clamping group 10 and the upper clamping group 41, a guide sliding block 7 and a reinforcing rib 62 are provided on the movable plate 4, the guide sliding block 7 is slidably connected with the support column 3, the lower clamping group 10 and the upper clamping group 41 are respectively composed of clamping cylinders with matching arc-shaped clamping plates, which can stably clamp the prestressed tendon body 42 and will not slide during detection.

[0027] The oil cylinder 6 has strong pulling force and is stable.

[0028] The detection host 11 is electrically connected to the tension sensor 2 through the signal line 13. The tension sensor 2 is respectively provided with a lower pull rod 21 and an upper pull rod 22. The lower pull rod 21 is fixed to the lower clamping group 10, and the upper pull rod 22 is fixed to the upper clamping group 41. The detection host 11, the signal line 13, and the tension sensor 2 are a group, which is the existing technology and can realize the detection of the reverse tension prestress of the prestressed tendon body 42. Some existing structures are not drawn and marked, and there is no need to repeat them.

[0029] The support column 3 is provided with a wire hole 30 , and the signal line 13 is passed through the wire hole 30 . The wire hole 30 is inclined toward the detection host 11 . The signal line 13 itself is a stainless steel bellows, which can be extended and deformed with the movement of the tension sensor 2 without affecting the transmission of the tension signal.

[0030] A telescopic rod 61 is slidably connected to the oil cylinder 6, and the telescopic rod 61 is fixed to the movable plate 4. There are four reinforcing ribs 62 arranged in a circle and arranged between the telescopic rod 61 and the movable plate 4. The reinforcing ribs 62 are made of alloy tungsten steel, which has high strength and does not deform, thereby improving the structural strength between the movable plate 4 and the telescopic rod 61 of the oil cylinder 6.

[0031] The guide rod 43 and the first guide hole 51 form a group, which are four symmetrically arranged groups in total. The top-view cross-section of the guide rod 43 and the first guide hole 51 is a square structure, which further improves the sliding stability of the guide rod 43 in the first guide hole 51.

[0032] The guide slider 7 is provided with a second guide hole 71 , and the guide slider 7 is slidably connected with the support column 3 through the second guide hole 71 , so as to achieve the effect of guiding the movable plate 4 vertically on the side.

[0033] A guide ball 8 is rotatably arranged inside the guide sliding block 7. The guide ball 8 is symmetrically arranged in two and is in rolling contact with the outer wall of the support column 3. The guide ball 8 is made of carbide steel, has high strength and does not deform. Due to the rolling contact, the smoothness of the vertical sliding of the guide sliding block 7 is further improved.

[0034] Working method: During the inspection, the sample of the prestressed tendon body 42 is first placed vertically, and stably clamped by the lower clamping group 10 and the upper clamping group 41. Then, the oil cylinder 6 is started, and the telescopic rod 61 of the oil cylinder 6 will slowly retract upward, thereby driving the movable plate 4 to move upward in the opposite direction, driving the upper clamping group 41 to move upward, and pulling the tension sensor 2 upward in the opposite direction through the upper pull rod 22. Since the lower pull rod 21 and the lower clamping group 10 are fixed on the inspection platform 1, the pulled tension sensor 2 will transmit the tension signal to the inspection host 11 in real time through the signal line 13, and the tension value will be displayed on the display screen 12 in real time. If the tension value displayed on the display screen 12 meets the tension value used by the prestressed tendon body 42 in the water conservancy project, then the current prestressed tendon body 42 sample meets the requirements for the use of prestressing in the water conservancy project.

[0035] When the movable plate 4 moves upward, it will drive the guide rod 43 to slide along the first guide hole 51. At the same time, it will also drive the guide sliding block 7 to slide along the support column 3 through the second guide hole 71, thereby achieving a double guiding effect. The overall upward and downward lifting guiding stability of the movable plate 4 is improved to avoid shaking, thereby ensuring the detection stability of the tensioning prestress of the prestressed tendon body 42.

[0036] In addition, by symmetrically arranging four triangular reinforcing ribs 62 between the moving plate 4 and the telescopic rod 61 of the oil cylinder 6, the structural strength between the moving plate 4 and the telescopic rod 61 of the oil cylinder 6 is improved as a whole.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reverse tension prestressing detector for water conservancy projects, comprising a detection platform (1), characterized in that: The detection platform (1) is provided with a lower clamping group (10) and a detection host (11), the detection host (11) is provided with a display screen (12) and a signal line (13), the detection platform (1) is provided with a support column (3), the support column (3) is provided with a top plate (5), the top plate (5) is provided with an oil cylinder (6) and a first guide hole (51), the lower clamping group (10) clamps a prestressed tendon body (42), a guide rod (43) is slidably connected in the first guide hole (51), a movable plate (4) is provided on the guide rod (43), an upper clamping group (41) is provided on the movable plate (4), a tension sensor (2) is provided between the lower clamping group (10) and the upper clamping group (41), a guide slider (7) and a reinforcement rib (62) are provided on the movable plate (4), and the guide slider (7) is slidably connected with the support column (3).

2. The reverse tension prestressing detector for water conservancy projects according to claim 1, characterized in that: The detection host (11) is electrically connected to the tension sensor (2) via a signal line (13); the tension sensor (2) is provided with a lower pull rod (21) and an upper pull rod (22), respectively; the lower pull rod (21) is fixedly arranged with the lower clamping group (10), and the upper pull rod (22) is fixedly arranged with the upper clamping group (41).

3. The reverse tension prestress detector for water conservancy projects according to claim 1, characterized in that: The support column (3) is provided with a wire hole (30), the signal line (13) is passed through the wire hole (30), and the wire hole (30) is inclined toward the detection host (11).

4. The reverse tension prestressing detector for water conservancy projects according to claim 1, characterized in that: A telescopic rod (61) is slidably connected to the oil cylinder (6), the telescopic rod (61) is fixedly arranged on the movable plate (4), and the number of the reinforcing ribs (62) is four and arranged in a circle and arranged between the telescopic rod (61) and the movable plate (4).

5. The reverse tension prestress detector for water conservancy projects according to claim 1, characterized in that: The guide rod (43) and the first guide hole (51) form a group, which is four groups symmetrically arranged in total. The top view cross-section of the guide rod (43) and the first guide hole (51) is a square structure.

6. The reverse tension prestress detector for water conservancy projects according to claim 1, characterized in that: The guide sliding block (7) is provided with a second guide hole (71), and the guide sliding block (7) is slidably connected to the support column (3) through the second guide hole (71).

7. The reverse tension prestress detector for water conservancy projects according to claim 1, characterized in that: A guide ball (8) is rotatably arranged inside the guide sliding block (7). Two guide balls (8) are symmetrically arranged and in rolling contact with the outer wall of the support column (3). The guide balls (8) are made of hard alloy steel.

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