Circle center measuring device

Abstract

The utility model provides a circle center measuring device. The circle center measuring device comprises a main ruler and an auxiliary ruler which are vertically arranged, wherein the main ruler and the auxiliary ruler are connected through a connecting piece, and the connecting piece is connected with the main ruler in a sliding mode in the length direction of the main ruler. According to the utility model, the main ruler is erected on the circle to be measured, the length of the position where the main ruler is located is measured through the main ruler, the midpoint position, namely the midpoint C, of the chord is determined based on the chord length obtained by the main ruler, and the auxiliary ruler slides to the midpoint position, namely the midpoint C, of the chord based on the determined midpoint position. And measuring the diameter length DE at the midpoint position of the chord through the auxiliary ruler, and determining the midpoint position of the diameter of the auxiliary ruler, namely the midpoint position of the diameter at the midpoint position of the chord, namely a circle center O based on the diameter length measured by the auxiliary ruler, so as to determine the circle center positions of the circular tube, the blind plate and the cover plate.

Description

Technical Field

[0001] The utility model relates to the technical field of civil construction, and particularly relates to a center measurement device. Background Art

[0002] At present, in civil construction, during the construction process, for some round pipes, blind plates, and circular covers, it is necessary to find the center of the circle for high-precision installation; when measuring, auxiliary tools need to be borrowed. However, when different people measure, there are large errors. For example, when measuring, the center of the circle cannot be accurately found, and the accuracy rate is not high. Moreover, when measuring, workers need to find auxiliary tools on-site or calculate to determine, and the work efficiency is low. Summary of the Invention

[0003] In view of this, the utility model provides a center measurement device, aiming to solve the problem that the center of the circle cannot be accurately found when finding the center of the circle of existing round pipes and circular covers, resulting in low accuracy.

[0004] The utility model provides a center measurement device, which includes a main scale and a secondary scale arranged vertically; wherein, the main scale and the secondary scale are connected by a connecting piece, and the connecting piece is connected with the main scale in a slidable manner along the length direction of the main scale, for adjusting the position of the secondary scale on the main scale, so as to place the main scale at any chord position of the circle to be measured, measure the chord length of the chord through the main scale, slide the secondary scale to the midpoint position of the chord, so as to place the secondary scale on the circle to be measured, obtain the diameter of the circle to be measured at the midpoint position of the chord, and determine the midpoint of the diameter, so as to determine the center position of the circle to be measured.

[0005] Further, for the above center measurement device, the connecting piece is also connected with the secondary scale in a slidable manner along the length direction of the secondary scale, for adjusting the position of the secondary scale, so that the secondary scale can be placed on the circle to be measured, for measuring the diameter of the circle to be measured at the midpoint position of the chord where the main scale is located.

[0006] Further, for the above center measurement device, a secondary sliding groove is provided on the secondary scale, for guiding the sliding of the connecting piece along the secondary scale.

[0007] Further, for the above center measurement device, the secondary scale and the connecting piece are also connected in a rotatable manner, for adjusting the angle between the main scale and the secondary scale, so that the secondary scale can be stacked on the main scale when not in use, and when measuring the diameter of the circle to be measured at the midpoint position of the chord, the secondary scale can be rotated to a position perpendicular to the main scale.

[0008] Further, in the above-mentioned center measurement device, a clamping groove is also provided on the main scale for clamping the secondary scale, so that when the secondary scale is stacked on the main scale, the secondary scale can be clamped at the clamping groove.

[0009] Further, in the above-mentioned center measurement device, a main sliding groove is provided on the main scale for guiding the sliding of the connecting member along the main scale.

[0010] Further, in the above-mentioned center measurement device, a main scale is provided on the main scale, and / or a secondary scale is provided on the secondary scale.

[0011] Further, in the above-mentioned center measurement device, the connecting member includes a screw and a screw cap provided on the screw.

[0012] Further, in the above-mentioned center measurement device, an angle display disk is further provided on the connecting member for displaying the angle between the secondary scale and the main scale.

[0013] Further, in the above-mentioned center measurement device, the main scale is a stainless steel scale, and / or the secondary scale is a stainless steel scale.

[0014] The center measurement device provided by the present utility model is mounted on the circle to be measured through the main scale, so as to measure the length at its position through the main scale, that is, the length of chord AB. Then, based on the chord length obtained by the main scale, the midpoint position of the chord, that is, midpoint C, is determined. And based on the determined midpoint position, the secondary scale is slid to the midpoint position of the chord, that is, midpoint C. Based on the perpendicular arrangement of the main scale and the secondary scale, the diameter length at the midpoint position of the chord, that is, the length of DE, is measured through the secondary scale. And based on the diameter length measured by the secondary scale, the midpoint position of the diameter where the secondary scale is located, that is, the midpoint position of the diameter at the midpoint position of the chord, is determined, which is the center O, so as to determine the center positions of the circular tube, the blind plate, and the cover plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the center measurement device in the use state provided by the embodiment of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the center measurement device in the folded state provided by the embodiment of the present utility model;

[0018] Figure 3 is a schematic diagram of the principle of the center measurement device provided by the embodiment of the present utility model. Detailed implementation manners

[0019] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] Refer to Figures 1 to 2 , which shows a preferred structure of the center - point measuring device provided by the embodiment of the present invention. As shown in the figure, the device includes: a main scale 1 and a sub - scale 2; wherein, the main scale 1 and the sub - scale 2 are arranged perpendicular to each other, and they are connected by a connecting member 3. The connecting member 3 is connected to the main scale 1 in a slidable manner along the length direction of the main scale 1, for adjusting the position of the sub - scale 2 on the main scale 1, so as to place the main scale 1 at any chord position of the circle to be measured, measure the chord length of this chord by the main scale 1, slide the sub - scale 2 to the mid - point position of this chord, so as to place the sub - scale 2 on the circle to be measured, obtain the diameter of the circle to be measured at the mid - point position of this chord, and determine the mid - point of this diameter, so as to determine the center position of the circle to be measured.

[0021] Specifically, as Figure 3 shown, when determining the center of a circle, first, take any chord AB on the circle, measure the chord AB to obtain the mid - point C. Then, draw a perpendicular line DE perpendicular to the chord AB through point C, and the perpendicular line DE intersects the circle at points D and E. Finally, measure the length of DE, and obtain the mid - point O of DE, which is the center of the circle. In this embodiment, the main scale 1 and the sub - scale 2 are respectively used as the measuring scales for the chord and the diameter at the mid - point position of this chord. Place the main scale 1 on the circle to be measured, so as to measure the length at its position by the main scale 1, that is, the length of the chord at its position, namely the length of the chord AB. Furthermore, based on the chord length obtained by the main scale 1, determine the mid - point position of this chord, that is, the mid - point C, and based on the determined mid - point position, slide the sub - scale 2 to the mid - point position of the chord, that is, the mid - point C. Based on the perpendicular arrangement of the main scale 1 and the sub - scale 2, according to Figure 3According to the principle shown, the diameter length at the midpoint of the chord, i.e., the length of DE, is measured by the secondary scale 2, and based on the diameter length measured by the secondary scale 2, the midpoint position of the diameter where the secondary scale 2 is located, i.e., the midpoint position of the diameter at the midpoint of the chord, is determined as the center O of the circle. For the convenience of determining the position of the center of the circle, main scales are provided on the main scale 1, and secondary scales are provided on the secondary scale 2 to determine the length of the corresponding position, so as to realize the position of the center of the circle to be measured. Among them, the main scale 1 can be a stainless steel ruler, and the secondary scale 2 can also be a stainless steel ruler. Of course, the main scale 1 and the secondary scale 2 can also be made of other materials, and no limitation is made on them in this embodiment. Among them, the main scale 1 is made of stainless steel, with a thickness of 50 mm, a total length of 600 mm, and a scale length of 500 mm; the secondary scale 2 is made of stainless steel, with a thickness of 30 mm, a total length of 750 mm, and a scale length of 500 mm.

[0022] Continue to refer to Figure 2 , a main sliding groove 11 is provided on the main scale 1 for guiding the sliding of the connecting member 3 along the main scale 1. Specifically, a main sliding groove 11 is provided on the main scale 1 along its length direction and penetrating through its thickness. The connecting member 3 can pass through the main sliding groove 11, and the connecting member 3 can slide along the main sliding groove 11 to drive the secondary scale 2 installed on the connecting member 3 to slide with the connecting member 3, so that the secondary scale 2 can slide with the connecting member 3 to the middle position of the chord where the main scale 1 is located.

[0023] Continue to refer to Figure 2 , the connecting member 3 is also connected to the secondary scale 2 in a slidable manner along the length direction of the secondary scale 2 for adjusting the position of the secondary scale 2 so that the secondary scale 2 can be erected on the circle to be measured for measuring the diameter at the midpoint position of the chord where the circle to be measured is located on the main scale 1. Specifically, the connecting member 3 is also connected to the secondary scale 2 in a slidable manner along the length direction of the secondary scale 2, which can realize the position of the connecting member 3 on the secondary scale 2, so that the secondary scale 2 can be adjusted according to the actual situation to enable it to be completely supported on the circle to be measured and realize the determination of the center position.

[0024] Continue to refer to Figure 2 , a secondary sliding groove 21 is provided on the secondary scale 2 for guiding the sliding of the connecting member 3 along the secondary scale 2. Specifically, a secondary sliding groove 21 is provided on the secondary scale 2 along its length direction and penetrating through its thickness. The connecting member 3 can pass through the main sliding groove 21, and the connecting member 3 can slide along the secondary sliding groove 21 to drive the secondary scale 2 installed on the connecting member 3 to slide with the connecting member 3, so that the secondary scale 2 can slide with the connecting member 3 to the middle position of the chord where the main scale 1 is located.

[0025] In this embodiment, the secondary scale 2 is also connected to the connecting member 1 in a rotatable manner, which is used to adjust the angle between the primary scale 1 and the secondary scale 2, so that the secondary scale 2 can be stacked on the primary scale 1 when not in use, and when measuring the diameter at the midpoint position of the chord of the circle to be measured, the secondary scale 2 can be rotated to a position perpendicular to the primary scale 1. Specifically, the secondary scale 2 is also connected to the connecting member 1 in a rotatable manner. The angle between the secondary scale 2 and the primary scale 1 can be adjusted by rotating the secondary scale 2, so that the secondary scale 2 can be rotated to a position perpendicular to the primary scale 1. The diameter at the middle position of the chord where the primary scale 1 is located can be measured through the secondary scale 2, and the middle position of the diameter at the middle position of the chord where the primary scale 1 is located is determined, which is the center of the circle. Of course, the angle between the secondary scale 2 and the primary scale 1 can also be adjusted by rotating the secondary scale 2, so that the angle between the secondary scale 2 and the primary scale 1 can be rotated to 0°, that is, the two are stacked and arranged, which is convenient for the storage of the device. In this embodiment, a clamping groove 12 is also provided on the primary scale 1 for clamping the secondary scale 2, so that when the secondary scale 2 is stacked on the primary scale 1, the secondary scale 2 can be clamped at the clamping groove. Among them, the middle position of the primary scale 1 has a clamping groove 12, and the secondary scale 2 is arranged at the clamping groove 12, so that the primary scale 1 can rotate 360° at the clamping groove 12. In particular, the secondary scale 2 can be rotated into the clamping groove 12, that is, stacked and embedded in the clamping groove 12 in the primary scale 1.

[0026] In this embodiment, an angle display disc (not shown in the figure) may also be provided on the connecting member 3 for displaying the angle between the secondary scale 2 and the primary scale 1, so as to ensure that the angle between the secondary scale 2 and the primary scale 1 can be 90°, so as to ensure the accuracy of the measurement.

[0027] In this embodiment, the connecting member 3 includes a screw 31 and a screw cap (not shown in the figure) provided on the screw 31. Specifically, the screw 31 is threadedly connected to the screw cap, and can pass through the main chute 11 of the primary scale 1 and the secondary chute 21 of the secondary scale 2. The screw 31 can slide in the main chute 11 of the primary scale 1 and the secondary chute 21 of the secondary scale 2 to realize the position adjustment in two directions.

[0028] To sum up, the center measurement device provided in this embodiment is erected on the circle to be measured through the primary scale 1, so as to measure the length at its position through the primary scale 1, that is, the length of the chord AB. Then, based on the chord length obtained by the primary scale 1, the midpoint position of the chord, that is, the midpoint C, is determined. And based on the determined midpoint position, the secondary scale 2 is slid to the midpoint position of the chord, that is, the midpoint C. Based on the perpendicular arrangement of the primary scale 1 and the secondary scale 2, the diameter length at the midpoint position of the chord, that is, the length of DE, is measured through the secondary scale 2. And based on the diameter length measured by the secondary scale 2, the midpoint position of the diameter where the secondary scale 2 is located, that is, the midpoint position of the diameter at the midpoint position of the chord, is determined, which is the center of the circle O, so as to determine the center positions of the circular pipe, the blind plate, and the cover plate.

[0029] It should be noted that in the description of the present utility model, the terms indicating the direction or positional relationship such as "upper", "lower", "left", "right", "inner", "outer", etc. are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0030] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Obviously, those skilled in the art can make various modifications and variations to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A circle center measuring device, characterized in that: include: The main scale and the secondary scale are arranged vertically; wherein, The main ruler and the secondary ruler are connected by a connecting piece, and the connecting piece is slidably connected to the main ruler along the length direction of the main ruler, and is used to adjust the position of the secondary ruler on the main ruler, so that the main ruler is placed at any chord position of the circle to be measured, the chord length of the chord is measured by the main ruler, and the secondary ruler is slid to the midpoint position of the chord, so that the secondary ruler is set on the circle to be measured, the diameter of the circle to be measured at the midpoint position of the chord is obtained, and the midpoint of the diameter is determined, so as to determine the center position of the circle to be measured.

2. The circle center measuring device according to claim 1, characterized in that: The connecting member is also slidably connected to the secondary ruler along the length direction of the secondary ruler, and is used to adjust the position of the secondary ruler so that the secondary ruler can be set on the circle to be measured to measure the diameter of the circle to be measured at the midpoint of the chord where the main ruler is located.

3. The circle center measuring device according to claim 2, characterized in that: The secondary ruler is provided with a secondary sliding groove for guiding the sliding of the connecting member along the secondary ruler.

4. The circle center measuring device according to claim 2, characterized in that: The secondary scale is also rotatably connected to the connecting piece, so as to adjust the angle between the main scale and the secondary scale, so that the secondary scale can be stacked on the main scale when not in use, and when measuring the diameter of the circle to be measured at the midpoint of the chord, the secondary scale can be rotated to a position perpendicular to the main scale.

5. The circle center measuring device according to claim 4, characterized in that: The main ruler is also provided with a fixing groove for fixing the auxiliary ruler, so that when the auxiliary ruler is stacked on the main ruler, the auxiliary ruler can be fixed in the fixing groove.

6. The circle center measuring device according to any one of claims 1 to 5, characterized in that: The main scale is provided with a main sliding groove for guiding the sliding of the connecting member along the main scale.

7. The circle center measuring device according to any one of claims 1 to 5, characterized in that: The main scale is provided with a main scale, and / or the secondary scale is provided with a secondary scale.

8. The circle center measuring device according to any one of claims 1 to 5, characterized in that: The connecting piece comprises a screw and a screw nut arranged on the screw.

9. The circle center measuring device according to any one of claims 1 to 5, characterized in that: The connecting member is also provided with an angle display plate for displaying the angle between the secondary ruler and the main ruler.

10. The circle center measuring device according to any one of claims 1 to 5, characterized in that: The main ruler is a stainless steel ruler, and / or the secondary ruler is a stainless steel ruler.

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