Centering device for measuring central point of screw

Abstract

The utility model discloses a centering device for measuring a central point of a screw rod, which comprises a prism connector used for connecting a total station and a support frame used for connecting the screw rod to be measured, and the prism connector is fixedly connected with a handle and a scale screw rod; the center of the top of the supporting frame is provided with a through hole for a scale screw to penetrate through and is fixedly connected with a fixing nut, the thread of the fixing nut is matched with the thread of the scale screw, the bottom of the supporting frame is provided with an opening, and when the supporting frame is placed at the top of a to-be-measured screw, the scale screw is fixed to the opening. The center line of the through hole, the center line of the fixing nut and the center line of the to-be-measured screw are located on the same plumb line. According to the utility model, the measuring time can be greatly saved, the working efficiency is improved, the cost is saved, the personnel safety risk is reduced, and the measuring accuracy is improved.

Description

Technical Field

[0001] The utility model relates to a bolt pre-embedded accuracy detection device, in particular to a screw rod center point measurement and centering device. Background Art

[0002] According to the relevant standards for quality acceptance, bolt embedding accuracy is an important indicator of later installation and an important indicator of project quality. At present, when measuring the center of bolt embedding accuracy, two people are required to cooperate with each other. After measuring the center of the hole with a tape measure, the prism is placed at the center for measurement. The labor cost is high, the operation is extremely inconvenient, and the measurement result has a large error. For the measurement of high-precision positioning bolts, it cannot meet the construction requirements. Utility Model Content

[0003] The technical problem to be solved by the utility model is that, in view of the problems of inaccurate center positioning, large measurement error, and large number of personnel required in the existing bolt pre-embedded precision detection process, the utility model provides a screw center point measurement and centering device which can improve work efficiency and save construction costs.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A screw center point measurement and centering device comprises a prism connector for connecting a total station and a support frame for connecting a screw to be measured, wherein:

[0006] The prism connector is fixedly connected to the handle and the ruler screw;

[0007] A through hole is provided at the center of the top of the support frame for the ruler screw to pass through, and is fixedly connected to a fixing nut, the thread of the fixing nut matches the thread of the ruler screw, and the bottom of the support frame is arranged to be an open opening. When the support frame is placed on the top of the screw to be measured, the center lines of the through hole and the fixing nut are on the same plumb line as the center line of the screw to be measured.

[0008] The utility model utilizes the fixed nut, the through hole and the center line of the screw to be measured on the support frame to be on the same plumb line, so that after the scale screw and the fixed nut are threadedly connected, the total station prism and the screw to be measured are simply, conveniently and directly aligned, so that one person can complete the center measurement operation of the bolt pre-embedded accuracy alone, and the measurement accuracy is high, the speed is fast, the work efficiency is high, and the construction cost is reduced.

[0009] Preferably, the support frame is in the shape of a truncated cone, so as to conveniently and quickly center the screw to be tested.

[0010] Preferably, the support frame is a truncated cone-shaped support frame with an angle of 63° between the inclined plane and the horizontal plane, and the scale screw is engraved with a scale indicating the diameter of the screw to be measured. After calculation, the truncated cone-shaped support frame with this angle can make the vertical height change value of the scale screw equal to the diameter change value of the screw to be measured. In this way, the utility model can set the diameter of the screw to be measured by rotating the handle before measurement, thereby replacing the prism rod to assist in measuring the height of the screw.

[0011] Preferably, the handle is an annular structure, so that the scale screw can be rotated conveniently by rotating the handle.

[0012] Preferably, the ruler screw is a standard component with a length of 5 cm.

[0013] Preferably, the scale is vertically arranged on the scale screw.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model utilizes a truncated cone support frame and a prism level bubble to conveniently and quickly perform centering and leveling of the total station prism, thereby facilitating accurate measurement of the center point position of the bolt to be measured, and ensuring that the measurement accuracy meets the specifications and design requirements.

[0016] 2. The utility model is mainly used to solve the installation accuracy detection of high-precision embedded bolts in engineering construction, and effectively solve the problems of low measurement accuracy and low efficiency caused by personnel centering errors and small working space.

[0017] 3. The utility model can set the diameter of the screw to be measured by adjusting the position of the ruler screw by rotating the handle according to the size of the screw to be measured before measurement, and then use the ruler screw to replace the prism rod to assist in measuring the screw elevation.

[0018] 4. The utility model is used to detect whether the accuracy of the embedded screw meets the design and specification requirements. The device of the utility model can be used by one person to complete the centering work alone, which greatly saves measurement time, improves work efficiency, saves costs, reduces personnel safety risks, and improves measurement accuracy.

[0019] 5. When the utility model is used, after the prism rod is leveled by the level bubble, it can ensure that the center of the total station prism and the center of the scale screw are on the same plumb line, which greatly reduces the measurement error and improves the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a front view of the screw center point measurement and centering device of the utility model.

[0022] Figure 2 The utility model is a top view of the screw center point measurement and centering device. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0024] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0025] 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; 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 according to specific circumstances.

[0026] See also Figure 1 - Figure 2 An embodiment of the screw center point measurement and centering device of the utility model comprises a prism connector 1 for connecting to a total station and a support frame 3 for connecting to a screw 2 to be measured.

[0027] The prism connector 1 is welded with a handle 4 and a scale screw 5, and a scale 6 indicating the diameter of the screw to be measured is vertically arranged on the scale screw 5. The handle 4 is an annular structure, and the scale screw 5 can be driven to move up and down by rotating the handle 4. The scale screw 5 is preferably a standard component with a length of 5 cm, one end of which is connected to the middle of the handle 4 and the other end is a conical structure.

[0028] The support frame 3 is in the shape of a truncated cone, and a through hole 32 is provided at the center of the top thereof for the ruler screw 5 to pass through, and a fixing nut 7 is welded thereto. The thread of the fixing nut 7 matches the thread of the ruler screw 5, and is used for threaded connection with the ruler screw 5, and serves as a supporting structure for the rotation and lifting of the ruler screw 5. The bottom of the support frame 3 is set as an open mouth 31, and when the support frame 3 is sleeved on the top of the screw 2 to be measured, the center line of the through hole 32 and the fixing nut 7 is on the same plumb line as the center line of the screw 2 to be measured.

[0029] The support frame 3 of the present invention preferably adopts a truncated cone-shaped support frame with an angle of 63° between the inclined surface and the horizontal plane, because after calculation, the truncated cone-shaped support frame with this angle can make the vertical height change value of the scale screw 5 equal to the diameter change value of the screw 2 to be measured. In this way, the utility model can indicate the diameter of the screw to be measured by arranging a scale 6 on the scale screw 5.

[0030] When the utility model is used, the prism connector 1 is first connected to the total station prism to form a whole, so that they are easy to move together during the measurement process; then the support frame 3 is put on the top of the screw rod 2 to be measured, and the center line of the through hole 32 and the fixing nut 7 is in the same straight line with the center line of the screw rod 2 to be measured, so as to realize the forced centering of the screw rod 2 to be measured; thereafter, the scale screw rod 5 is threadedly connected with the fixing nut 7, and the prism rod is leveled by the level bubble, so that the center of the total station prism and the center of the screw rod center point measurement and centering device of the utility model can be ensured to be on the same plumb line, and then the total station prism can be used to collect data on the hole center of the screw rod to be measured.

[0031] When the utility model is used, the handle 4 can also be rotated according to the diameter of the screw 2 to be measured until the scale screw 5 reaches the set screw diameter to be measured. After that, the scale screw 5 of the utility model can replace the prism rod to assist in measuring the screw elevation (the total station prism uses the prism rod to measure the screw elevation, which is an inherent function of the total station prism).

[0032] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. A screw center point measurement and centering device, comprising a prism connector for connecting a total station and a support frame for connecting a screw to be measured, characterized in that: The prism connector is fixedly connected to the handle and the scale screw; A through hole is provided at the center of the top of the support frame for the ruler screw to pass through, and is fixedly connected to a fixing nut, the thread of the fixing nut matches the thread of the ruler screw, and the bottom of the support frame is arranged to be an open opening. When the support frame is placed on the top of the screw to be measured, the center lines of the through hole and the fixing nut are on the same plumb line as the center line of the screw to be measured.

2. The screw center point measurement and centering device according to claim 1, characterized in that: The support frame is in the shape of a truncated cone.

3. The screw center point measurement and centering device according to claim 2, characterized in that: The support frame is a truncated cone-shaped support frame with an angle of 63° between the inclined surface and the horizontal plane, and the scale screw is engraved with a scale indicating the diameter of the screw to be measured.

4. The screw center point measurement and centering device according to claim 1, characterized in that: The handle is a ring structure.

5. The screw center point measurement and centering device according to claim 3, characterized in that: The scale is vertically arranged on the scale screw.

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