Improved sleeve detection ruler

Abstract

The utility model belongs to the technical field of constructional engineering detection equipment, and particularly relates to an improved sleeve detection ruler which comprises a U-shaped frame body, a main ruler and a vernier scale, the two ends of the U-shaped frame body are connected with clamping plates, and the clamping plates are provided with arc-shaped clamping grooves for clamping reinforcing steel bars; the two ends of the main ruler are connected with the U-shaped frame body, a pointer I is fixedly connected to the main ruler, and the pointer I is aligned with the zero scale of the main ruler. According to the utility model, the clamping plate is provided with the arc-shaped clamping groove for clamping a reinforcing steel bar, so that the U-shaped frame body is prevented from shaking in the measurement process, the pointer I additionally arranged on the main scale can point to a measurement starting point in a close range, and the vernier scale can be close to the sleeve, so that a measurement terminal point can be accurately positioned, and the accuracy of a measurement result is improved. The device is simple in structure and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering detection equipment, and specifically relates to an improved sleeve detection ruler. Background Art

[0002] There are four main ways to connect steel bars: binding lap joint, mechanical connection, sleeve grouting connection and welding. In mechanical connection, sleeves are often used to connect two steel bars. It can be seen that sleeves play a vital role. The way to connect steel bars with sleeves is to saw the steel bars flat, thread them, and then use sleeves to connect the two steel bars. According to Article 6.3.1 of the "Technical Code for Mechanical Connection of Steel Bars" (JGJ107-2016): The installation of straight thread joints shall comply with: When installing the joints, the pipe wrench can be used to tighten them, and the steel wire heads should be in the center of the sleeve and tightened against each other. After the joint is installed, the tightening torque should be checked with a torque wrench, and the minimum tightening torque should meet the regulations.

[0003] Torque wrenches are commonly used for inspection at construction sites, and simple vernier calipers are used (the structure of simple vernier calipers is as follows Figure 6 As shown in the figure, it includes a main scale 2 and a vernier scale 3) to measure the length of the thread head of the steel bar exposed from the sleeve, so as to determine whether the joint (tightening position) is in the center of the sleeve. However, when using a simple vernier caliper, it cannot be relatively fixed on the steel bar and needs to be held by the measurer. The simple vernier caliper is easy to shake, and due to the existence of the sleeve, the simple vernier caliper cannot fit the steel bar for measurement, and the zero scale positioning problem is prone to occur, resulting in inaccurate measurement results. Utility Model Content

[0004] The utility model aims to provide an improved sleeve detection ruler to solve the problems of easy shaking and inaccurate measurement when a simple vernier caliper is used on a construction site.

[0005] In order to achieve the above-mentioned purpose, the scheme of the utility model is: an improved sleeve detection ruler, including a U-shaped frame, a main scale and a vernier scale, both ends of the U-shaped frame are connected with a clamping plate, and the clamping plate is provided with an arc-shaped clamping groove for the steel bar to be clamped; both ends of the main scale are connected to the U-shaped frame, and a pointer I is fixedly connected to the main scale, and the pointer I is aligned with the zero scale of the main scale.

[0006] The working principle and beneficial effects of this solution are as follows: in this solution, the steel bar is clamped into the arc-shaped clamping groove on the clamping plate, so that the detection ruler is relatively fixed on the steel bar to avoid shaking of the detection ruler during the measurement process; secondly, this solution adds a pointer I on the main scale, and the pointer I points to the measurement starting point at a close distance, while the vernier scale is close to the sleeve, which can accurately locate the measurement end point, so that the detection ruler is accurately positioned during measurement, thereby improving the accuracy of the measurement result.

[0007] Moreover, in the present solution, after the steel bars are butt-jointed, the two clamping plates are clamped on the two steel bars and marks are made on the clamping positions. After the sleeve is connected to the steel bars, it is observed whether the two clamping plates are clamped at the corresponding marks to check whether the steel bar joint is tight.

[0008] Optionally, both ends of the main ruler are vertically slidably connected to the U-shaped frame.

[0009] In this solution, when the detection ruler is engaged on the steel bar, the main ruler can slide vertically relative to the U-shaped frame, so that the vernier ruler will not be hindered by the sleeve when sliding on the main ruler.

[0010] Optionally, both ends of the main ruler are fixedly connected with a sliding sleeve, and the inner peripheral wall of the sliding sleeve is in contact with the outer peripheral wall of the U-shaped frame.

[0011] In this solution, the sliding connection between the main ruler and the U-shaped frame is achieved by sleeves being mounted on the U-shaped frame. The structure is simple and no structural damage is caused to the U-shaped frame and / or the main ruler.

[0012] Optionally, a pointer II is fixedly connected to the vernier ruler, and a side of pointer II close to pointer I or a side of pointer II away from pointer I is aligned with the zero scale of the vernier ruler.

[0013] In this solution, a pointer II is added to the vernier scale so that the zero scale and positioning of the vernier scale can be accurate when measuring the length of the steel wire head.

[0014] Optionally, the clamping plate is detachably connected to the U-shaped frame.

[0015] In this solution, the clamping plate is detachably connected to the U-shaped frame, so that the clamping plate with an arc-shaped clamping groove of corresponding size can be replaced according to the specifications of the steel bars, thereby expanding the application range of the detection ruler.

[0016] Optionally, a threaded connection pipe is fixedly connected to the clamping plate, and a threaded section that is threadably matched with the threaded connection pipe is provided at the end of the U-shaped frame.

[0017] In this solution, the detachable connection between the clamping plate and the U-shaped frame is achieved by threaded connection, which has a simple structure and is easy to operate.

[0018] Optionally, the U-shaped frame is fixedly connected with an indicator plate, the number of the indicator plates is the same as the number of the snap plates, and the indicator plates are aligned with the corresponding snap plates, the snap plates are located on one side of the U-shaped frame, and the indicator plates are located on the other side of the U-shaped frame; a centering mark line is provided on the U-shaped frame, and the centering mark line coincides with the mid-perpendicular line of the distance between the two snap plates.

[0019] In this solution, after the steel bars are butt-jointed, the centering mark is aligned with the butt joint gap of the steel bars, and then the steel bars are marked with the indicator sheet. After the sleeve connects the steel bars, one clamping plate is clamped at the mark of one steel bar, and the other clamping plate is observed to be clamped at the mark of the other steel bar, so as to check whether the steel bar joint is tight. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the improved sleeve detection ruler in the first embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the improved sleeve detection ruler after being separated in the first embodiment of the utility model;

[0022] Figure 3 for Figure 2 A right side view of the snap plate on the right side;

[0023] Figure 4 This is a schematic diagram of the structure of the improved sleeve detection ruler in the second embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the improved sleeve detection ruler in the third embodiment of the utility model;

[0025] Figure 6 It is a structural diagram of a simple vernier caliper. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The markings in the drawings of the specification include: U-shaped frame 1, threaded section 101, main scale 2, vernier scale 3, clamping plate 4, arc-shaped slot 401, threaded connecting pipe 5, sliding sleeve 6, pointer I 7, steel bar 8, sleeve 9, pointer II 10, indicator sheet 11, centering mark line 12.

[0028] Embodiment 1

[0029] This embodiment is basically Figure 1 and Figure 2 As shown: the improved sleeve detection ruler comprises a U-shaped frame 1, a main scale 2 and a vernier scale 3. Both ends of the U-shaped frame 1 are detachably connected with a clamping plate 4. Specifically, a threaded connecting pipe 5 is welded on the clamping plate 4. The end of the U-shaped frame 1 is provided with a threaded section 101 that is threadably matched with the threaded connecting pipe 5. Figure 3As shown, the clamping plate 4 is provided with an arc-shaped clamping groove 401 for the steel bar 8 to be clamped. The two ends of the main ruler 2 are connected to the U-shaped frame 1. In this embodiment, the two ends of the main ruler 2 are vertically slidably connected to the U-shaped frame 1. Specifically, the two ends of the main ruler 2 are welded with a sliding sleeve 6, and the inner peripheral wall of the sliding sleeve 6 is in contact with the outer peripheral wall of the U-shaped frame 1. In another embodiment, the two ends of the main ruler 2 are directly welded to the U-shaped frame 1. A pointer Ⅰ7 is welded on the main ruler 2, and the pointer Ⅰ7 is aligned with the zero scale of the main ruler 2.

[0030] The use process of the detection ruler in this embodiment is as follows: after the two steel bars 8 are butt-jointed, one clamping plate 4 is clamped on one steel bar 8, and the other clamping plate 4 is clamped on the other steel bar 8 (the steel bar 8 is sunk into the arc-shaped clamping groove 401 of the clamping plate 4), and the butt joint gap of the steel bars 8 is made to be located in the center of the U-shaped frame 1 as much as possible; then, a marking pen is used to mark the clamping point between the steel bar 8 and the clamping plate 4.

[0031] Then, the sleeve 9 connects the steel bars 8, and the user engages a snap plate 4 at the mark of one steel bar 8, and observes whether the other snap plate 4 engages at the mark of another steel bar 8. If it engages at the mark, it means that the joint of the steel bar 8 in the sleeve 9 is tight; if it does not engage at the mark, it means that the joint of the steel bar 8 in the sleeve 9 is not tight, and the steel bar 8 needs to be tightened further.

[0032] After the joint of the steel bar 8 is tightened, there are multiple measurement methods. This embodiment lists the following two measurement methods:

[0033] The first measurement method: measure the length of the thread head of a single steel bar 8 protruding from the sleeve 9. For the convenience of description, the part of a single steel bar 8 protruding from the sleeve 9 is recorded as section C, and the length is recorded as c. Specifically, move the U-shaped frame 1 along the axial direction of the steel bar 8 until the pointer I7 on the main scale 2 points to the starting point of the thread head of the steel bar 8 (i.e., the left end point of section C), and then slide the vernier scale 3 so that the zero scale of the vernier scale 3 is aligned with the left end of the sleeve 9. The user can read the data c. The thread head length of the steel bar 8 and the length of the sleeve 9 are both known (pre-measured data). For the convenience of description, the length of the sleeve 9 is recorded as a, and the thread head length of the steel bar 8 is recorded as b. If c = b-(a / 2), it means that the joint of the steel bar 8 is located in the center of the sleeve 9; if c≠b-(a / 2), it means that the joint of the steel bar 8 is not centered.

[0034] The second measurement method: measure the sum of the portion of the thread head of a single steel bar 8 exposed from the sleeve 9 and the length of the sleeve 9. For the convenience of description, the portion of the single steel bar 8 exposed from the sleeve 9 is recorded together with the sleeve 9 as the D segment, and the length is recorded as d. Specifically, move the U-shaped frame 1 until the pointer I7 on the main scale 2 points to the starting point of the thread head of the steel bar 8 (i.e., the left end point of the D segment), and then slide the vernier scale 3 so that the zero scale of the vernier scale 3 is aligned with the right end of the sleeve 9. The user reads the data d. The thread head length of the steel bar 8 and the length of the sleeve 9 are both known. For the convenience of description, the thread head length of the steel bar 8 is recorded as a, and the thread head length of the steel bar 8 is recorded as b. If d=b+(a / 2), it means that the joint of the steel bar 8 is located in the center of the sleeve 9; if d≠b+(a / 2), it means that the joint of the steel bar 8 is not centered (if d>b+(a / 2), it means that the joint of the steel bar 8 is biased to the left, and if d<b+(a / 2), it means that the joint of the steel bar 8 is biased to the right).

[0035] In addition, when the specification of the steel bar 8 to be tested changes, the threaded connecting tube 5 can be rotated to remove the clamping plate 4 and replace it with a clamping plate 4 with an arc-shaped clamping groove 401 of suitable size, thereby increasing the applicability of the detection ruler. In addition, in this embodiment, the main scale 2 can slide along the U-shaped frame 1, and the sliding direction is the radial direction of the sleeve 9. Therefore, when the vernier scale 3 is blocked by the sleeve 9 during the process of sliding left and right along the main scale 2, the main scale 2 can be slid away from the sleeve 9. After the vernier scale 3 slides past, the main scale 2 can be released and reset, without removing the U-shaped frame 1 from the steel bar 8 and then sliding the vernier scale 3.

[0036] In summary, in this embodiment, the clamping plate 4 is clamped on the steel bar 8, so that the position of the U-shaped frame 1 relative to the steel bar 8 is fixed, compared with a simple vernier caliper (structure such as Figure 6 As for the main scale 2 and the vernier scale 3 in this embodiment, they are not easy to shake, thereby improving the accuracy of the measurement result; and, the pointer I7 can point to the measurement starting point at a close distance, so that the main scale 2 is accurately positioned during measurement, thereby improving the accuracy of the measurement result.

[0037] Embodiment 2

[0038] The difference between this embodiment and the first embodiment is that: Figure 4 As shown, a pointer II 10 is welded on the vernier scale 3, and the side of the pointer II 10 close to the pointer I 7 or the side of the pointer II 10 away from the pointer I 7 is aligned with the zero scale of the vernier scale 3. In this embodiment, the side of the pointer II 10 close to the pointer I 7 is aligned with the zero scale of the vernier scale 3. The thickness of the pointer II 10 is known, and for the convenience of description, the thickness of the pointer II 10 is recorded as e.

[0039] In this embodiment, when the first measurement method is adopted, the right side of the pointer II 10 is against the left end of the sleeve 9, and the right end detection position of the C section can be quickly located to improve the measurement efficiency. If c = b-(a / 2)-e, it means that the joint of the steel bar 8 is located in the center of the sleeve 9; if c≠b-(a / 2)-e, it means that the joint of the steel bar 8 is not centered. When the second measurement method is adopted, the pointer II 10 is against the right end of the sleeve 9, so as to quickly locate it. There is no need for the user to observe and align the zero scale of the vernier 3 with the measuring point of the sleeve 9. The detection efficiency is higher and does not affect the judgment formula of d. Moreover, since the pointer II 10 is added to the vernier 3, the pointer II 10 can point to the measurement end point at a close distance. For example, when measuring the length of the thread head of the steel bar 8, the pointer II 10 can point to the joint gap of the steel bar 8 at a close distance.

[0040] Embodiment 3

[0041] The difference between this embodiment and the second embodiment is that: Figure 5 As shown, the U-shaped frame 1 is welded with an indicator sheet 11, the number of the indicator sheet 11 is the same as the number of the clamping plates 4, and the indicator sheet 11 is aligned with the corresponding clamping plates 4, the clamping plates 4 are located on one side of the U-shaped frame 1, and the indicator sheet 11 is located on the other side of the U-shaped frame 1. A centering mark 12 is provided on the frame, and the centering mark 12 coincides with the mid-perpendicular line of the distance between the two clamping plates 4.

[0042] In this embodiment, after the steel bars 8 are butt-jointed, the U-shaped frame 1 is placed close to the steel bars 8, and the centering mark 12 on the U-shaped frame 1 is aligned with the butt joint gap of the steel bars 8, and then a marking pen is used to mark the steel bars 8 corresponding to the indicator sheet 11, thereby ensuring that the butt joint gap of the steel bars 8 is located in the center of the U-shaped frame 1.

[0043] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the utility model. The specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. Improved sleeve detection ruler, characterized by: It includes a U-shaped frame, a main scale and a vernier scale. Both ends of the U-shaped frame are connected with a clamping plate, and the clamping plate is provided with an arc-shaped clamping groove for the steel bar to be clamped in; both ends of the main scale are connected to the U-shaped frame, and a pointer I is fixedly connected to the main scale, and the pointer I is aligned with the zero scale of the main scale.

2. The improved sleeve detection ruler according to claim 1, characterized in that: Both ends of the main ruler are vertically slidably connected to the U-shaped frame.

3. The improved sleeve detection ruler according to claim 2, characterized in that: Both ends of the main ruler are fixedly connected with a sliding sleeve, and the inner peripheral wall of the sliding sleeve is in contact with the outer peripheral wall of the U-shaped frame.

4. The improved sleeve detection ruler according to claim 1 or 2, characterized in that: The vernier ruler is fixedly connected with a pointer II, and a side of the pointer II close to the pointer I or a side of the pointer II away from the pointer I is aligned with the zero scale of the vernier ruler.

5. The improved sleeve detection ruler according to claim 1, characterized in that: The clamping plate is detachably connected to the U-shaped frame.

6. The improved sleeve detection ruler according to claim 5, characterized in that: A threaded connection pipe is fixedly connected to the clamping plate, and a threaded section that is threadably matched with the threaded connection pipe is provided at the end of the U-shaped frame.

7. The improved sleeve detection ruler according to claim 1, characterized in that: The U-shaped frame is fixedly connected with an indicator sheet, the number of the indicator sheets is the same as the number of the clamping plates, and the indicator sheets are aligned with the corresponding clamping plates, the clamping plates are located on one side of the U-shaped frame, and the indicator sheets are located on the other side of the U-shaped frame; a centering mark line is provided on the U-shaped frame, and the centering mark line coincides with the mid-perpendicular line of the distance between the two clamping plates.

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