A central projection type pipeline intersecting line marking device

Abstract

The application relates to a central projection type pipeline intersecting line marking device which effectively solves the problems of poor universality, inconvenience in use and unsuitability for large-diameter pipelines of the intersecting line marking equipment; the technical solution comprises a head and a supporting rod, the head comprises a hollow shell, a light-transmitting cover is fixed to the right end of the shell, the light-transmitting cover is made of reversible color-changing material, a first point light source is arranged in the shell, a horizontal mounting rod is arranged on the concave side of the light-transmitting cover and is provided with a parallel light beam projection unit, the parallel light beam projection unit can project parallel light beams on the light-transmitting cover, and the color or light transmittance of the light-transmitting cover in the projection area of the parallel light beams will change; the application uses the equal-ratio amplification principle of the central projection of the first point light source to simulate the equal-ratio amplification projection of the intersecting line on the target pipeline for display and identification, the purpose of representing the intersecting line of the large-diameter pipeline by the small device is achieved, the stability is good, the device is convenient to use, and the intersecting line can be completely displayed.

Description

TECHNICAL FIELD

[0001] The application relates to the field of water conservancy pipeline construction, and particularly relates to a center projection type pipeline intersecting line marking device. BACKGROUND

[0002] In water conservancy projects, large-diameter water conveying pipelines are often used, and some pipelines need to be intersected and welded, and the pipelines need to be cut along the intersecting line before welding, so the intersecting line needs to be marked first.

[0003] The application patent with the application number 201811274772.9 surrounds the target pipeline by a plurality of axially movable round rods to intersect the target pipeline, and the shape of the intersecting line is reflected by the positions of the round rods. This device has a complex structure, fixed size, and can only simulate a single size of pipeline, and has no universality at all, and is completely unrealistic for large-diameter pipelines, so it is almost not used in construction.

[0004] The most common device at present is to use the parallel projection principle, for example, the application patent with the application number 201910184538.5, the utility model patent with the application number 201620624590.X, and the application patent with the application number 201610343919.X, which use a laser line to simulate the generatrix of the intersecting pipeline, simulate the intersecting pipeline by rotating the laser line around a virtual axis, mark the light points of the laser line on the target pipeline at a plurality of positions, and connect all the marked points with a smooth curve after one rotation to obtain the intersecting line. Although the distance between the laser line and the rotation center can be adjusted to adjust the diameter of the simulated pipeline, the point taking process is tedious, and due to the nature of the parallel projection image being the same size as the real object, for large-diameter pipelines, in order to make the laser emitting device have a large-diameter rotating path, a very long mounting arm is needed, and in order to ensure stability during rotation, the mounting arm must have sufficient rigidity, which requires increasing the cross-sectional size of the mounting arm, which increases the volume of the device and makes it very inconvenient to rotate.

[0005] The utility model patent with the application number CN202222179429.4 rotates the mounting arm at high speed on the basis of the above-mentioned parallel projection type device, so that the light points of the laser line on the outer wall of the target pipeline rotate at high speed to form a continuous light ring, which intuitively shows the complete intersecting line, but the high-speed rotation of the mounting arm puts higher requirements on the rigidity of the mounting arm and the stability during rotation, especially for large-diameter pipelines, which is extremely difficult to implement.

[0006] The utility model discloses a parallel light beam projection principle is utilized, and a cylindrical parallel light beam is formed through the light shield plate, and the light beam is irradiated on the target pipe and forms the complete intersection line light circle, but needs to make and replace different light shield plate according to the size of pipe, and the use is troublesome and the cost is high, in addition, since parallel projection does not have the amplification function, the size of light shield plate must be consistent with the pipe, so it is also not applicable to the large diameter pipe. SUMMARY

[0007] The present application provides a kind of central projection type pipe intersection line marking device, to solve the problem of intersection line marking equipment poor universality, troublesome, not applicable to large diameter pipe.

[0008] Its technical solutions include head and support rod, head is fixed on the upper end of support rod, head includes a hollow shell, the shell is a stretch body and the stretch axis is along front-back direction, the right end of shell is fixed with a light transmission cover, the light transmission cover is reversible color-changing material, the light transmission cover is a half-cylinder along the axis and is cut, and the axis of light transmission cover is parallel to the stretch axis of shell, the convex surface of light transmission cover is to left, a first point light source is arranged in the shell, and the first point light source is at the same height with the axis of light transmission cover, the concave surface side of light transmission cover is installed with a parallel light beam projection unit through a horizontal mounting rod, the parallel light beam projection unit can project parallel light beam on the light transmission cover, and the color or transmittance of the area of light transmission cover projected by parallel light beam will change;The parallel light beam projection unit includes a second point light source fixed on the right end of mounting rod, a light shield cylinder is screwed on the mounting rod, the second point light source is located in the light shield cylinder and is located on the axis of light shield cylinder, and the right end of light shield cylinder is opened, a concave mirror is arranged on the right side of light shield cylinder, the second point light source is located at the focal point of concave mirror, the axis of light shield cylinder is coincided with the axis of concave mirror, and the light cone projected by the second point light source through the right end port of light shield cylinder is irradiated on the concave mirror and is reflected by the concave mirror into parallel light beam and is irradiated on the light shield cover.

[0009] The light transmission cover is reversible photochromic material, the light intensity of the second point light source is greater than that of the first point light source, and the light of the second point light source reflected to the light transmission cover by the concave mirror can make the irradiated area of the light transmission cover obviously reduce the transmittance.

[0010] The light transmission cover is reversible thermochromic material, and the second point light source is a heating light source, and the light of the second point light source reflected to the light transmission cover by the concave mirror can make the irradiated area of the light transmission cover obviously change color.

[0011] The mounting rod is composed of a first rod segment on the left and a second rod segment on the right, and the two segments are hingedly connected through a vertical bolt, the first rod segment is fixed on the light-transmitting cover, and the second rod segment can rotate around the hinging axis after the bolt is loosened; the housing is internally provided with a horizontal screw rod in the front-back direction, and a moving block is threadedly mounted on the screw rod, and the first point light source is fixed on the moving block.

[0012] The housing is internally fixed with a sliding rod in the front-back direction, the sliding rod passes through the moving block, and the moving block can move along the sliding rod.

[0013] The mirror surface of the concave mirror is provided with two vertical coating lines intersecting at the center, the coating lines are not reflective, and the coating lines can display a cross cursor in the area of the light-transmitting cover when the parallel light beam is irradiated on the light-transmitting cover; the lower portion of the first point light source is fixed with a laser line light source, the projection point of the laser line light source on the light-transmitting cover is in the same height as the axis of the light-transmitting cover, and is left-right aligned with the first point light source.

[0014] The second rod segment is a telescopic rod with adjustable length.

[0015] The right end of the mounting rod is fixed with a horizontal connecting rod, the concave mirror is arranged on the connecting rod and is fixed by a nut, and the concave mirror has multiple sizes for replacement; the cross section of the connecting rod is a non-circular cross section.

[0016] The supporting rod is a multi-stage telescopic cylinder or a multi-stage electric telescopic rod, and the upper end of the supporting rod is fixed to the outer wall of the housing.

[0017] The present application uses the equal-ratio magnification principle of the central projection of the first point light source to project and display the simulated intersecting lines on the target pipeline, so that the intersecting lines of the large-diameter pipeline can be displayed completely. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front view of the present application.

[0019] Figure 2 It is the front view of the head of the present application.

[0020] Figure 3 It is the front view of the present application in use.

[0021] Figure 4 It is Figure 2 The enlarged view of the A position.

[0022] Figure 5 It is Figure 2 The enlarged view of the B position.

[0023] Figure 6 It is Figure 2A magnified view of position C in the middle.

[0024] Figure 7 This is a top view of the invention during use. Figure 1 The pipes in the diagram intersect perpendicularly.

[0025] Figure 8 for Figure 7 A magnified view of position D in the middle.

[0026] Figure 9 This is a top view of the invention during use. Figure 2 The pipes in the diagram do not intersect perpendicularly.

[0027] Figure 10 This is the left view of a concave mirror. Detailed Implementation

[0028] The present application comprises a head 2 and a support rod 1, the head 2 is fixed on the upper end of the support rod 1, the head 2 can project a light spot of the required intersection line on the pipeline to be marked, the head 2 comprises a hollow shell 3, the shell 3 is a stretch body and the stretch axis is along the front and back direction, the right end of the shell 3 is fixed with a light transmission cover 4, the light transmission cover 4 is a reversible color changing material, the light transmission cover 4 is a half cylinder which is cut along the axis, the axis of the light transmission cover 4 is parallel to the stretch axis of the shell 3, the convex surface of the light transmission cover 4 is towards left, a first point light source 5 is arranged in the shell 3, the first point light source 5 is at the same height with the axis of the light transmission cover 4, the light of the first point light source 5 can be projected on the outer wall of the pipeline to be marked through the light transmission cover 4, the concave surface side of the light transmission cover 4 is installed with a parallel light beam projection unit through a horizontal mounting rod 6, the parallel light beam projection unit can project a parallel light beam on the light transmission cover 4, the edge of the light spot of the parallel light beam on the light transmission cover 4 is the intersection line, the color or the light transmission of the area of the light transmission cover 4 which is projected by the parallel light beam will change; so that the projection of the light of the first point light source 5 on the pipeline to be marked through the light transmission cover 4 has obvious color difference or brightness difference with the boundary of the intersection line, so that the intersection line is marked, and the projection on the pipeline is the similar enlargement of the light spot shape on the light transmission cover 4; the parallel light beam projection unit comprises a second point light source 7 which is fixed on the right end of the mounting rod 6, the mounting rod 6 is screwed with a light shielding cylinder 8, the second point light source 7 is located in the light shielding cylinder 8 and on the axis of the light shielding cylinder 8, and the right end of the light shielding cylinder 8 is opened, the light of the second point light source 7 is emitted in a cone shape through the right end of the light shielding cylinder 8, the closer the second point light source 7 is to the right end of the light shielding cylinder 8, the larger the area which can be irradiated by the light cone of the second point light source 7, a concave mirror 9 is arranged on the right side of the light shielding cylinder 8, the second point light source 7 is located at the focal point of the concave mirror 9, the axis of the light shielding cylinder 8 coincides with the axis of the concave mirror 9, since the concave mirror 9 has the property that the light emitted from the focal point is reflected by the concave mirror 9 and is parallel to the main optical axis, the light cone projected by the second point light source 7 through the right end of the light shielding cylinder 8 is irradiated on the concave mirror 9, is reflected by the concave mirror 9 into a parallel light beam and is irradiated on the light shielding cover, so that the color or the light transmission of the area of the light transmission cover 4 irradiated by the parallel light beam changes.

[0029] The light transmission cover 4 is reversible photochromic material, such as silver halide lens which is the common photochromic lens material, has the characteristics that the stronger the irradiation light intensity is, the deeper the color is, and the lower the light transmission is, the light intensity of the second point light source 7 is greater than that of the first point light source 5, the light of the second point light source 7 reflected by the concave mirror 9 on the light transmission cover 4 will cause the irradiated area of the light transmission cover 4 to have obvious light transmission reduction, so that the light domain of the pipeline surface projected by the first point light source 5 through the light transmission cover 4 has obvious dark light spot, and the boundary of the light spot is the intersection line.

[0030] The light-transmitting cover 4 is a reversible thermochromic material, such as the thermochromic glass disclosed in the utility model patent with the application number 201620793355.5, which changes color with temperature changes. The second point light source 7 is a heat-emitting light source. The light from the second point light source 7 reflected by the concave mirror 9 onto the light-transmitting cover 4 will cause the irradiated area of the light-transmitting cover 4 to change color significantly, so that the light domain projected by the first point light source 5 onto the surface of the pipeline through the light-transmitting cover 4 has a significant chromatic aberration spot, and the boundary of the light spot is the intersection line.

[0031] The reversible photochromic material and the reversible thermochromic material both belong to existing mature materials, and have a large range of choices. In specific implementation, they can be selected according to requirements.

[0032] The mounting rod 6 is composed of a first rod segment 10 on the left and a second rod segment 11 on the right. The two segments are hingedly connected by a vertical bolt 12. The first rod segment 10 is fixed to the light-transmitting cover 4. After loosening the bolt 12, the second rod segment 11 can rotate around the hinge axis, so as to adjust the angle between the axis of the parallel light beam reflected by the concave mirror 9 and the axis of the light-transmitting cover 4, and simulate the intersection line when two pipelines intersect non-perpendicularly. A horizontal lead screw 13 in the front-rear direction is arranged in the housing 3. A moving block 14 is threadedly mounted on the lead screw 13. The first point light source 5 is fixed to the moving block 14. Rotating the lead screw 13 can drive the moving block 14 and the first point light source 5 to move forward and backward, so as to align the first point light source 5 with the center of the simulated intersection line.

[0033] A sliding rod 15 in the front-rear direction is fixed in the housing 3. The sliding rod 15 passes through the moving block 14. The moving block 14 can move along the sliding rod 15. The sliding rod 15 can prevent the moving block 14 from rotating with the lead screw 13.

[0034] Two coating lines 16 intersecting at the center of the mirror surface of the concave mirror 9 are arranged on the mirror surface. The coating lines 16 do not reflect light. When the parallel light beam is irradiated on the area of the light-transmitting cover 4, the coating lines 16 will display a crosshair. The intersection point of the crosshair is the center of the intersection line area. A laser line light source 17 is fixed below the first point light source 5. The projection point of the laser line light source 17 on the light-transmitting cover 4 is at the same height as the axis of the light-transmitting cover 4, and is aligned with the first point light source 5 left and right. When the projection point of the laser line light source 17 is projected on the crosshair, it indicates that the first point light source 5 is aligned with the center of the intersection line of the parallel light beam and the light-transmitting cover 4.

[0035] The second rod segment 11 is a telescopic rod with adjustable length, so as to adjust the distance between the parallel light beam projection unit and the light-transmitting cover 4. The farther the distance, the smaller the area of the light projected by the first point light source 5 through the light-transmitting cover 4, which is blocked by the concave mirror 9. This avoids the interference of the boundary of the color-changing area of the concave mirror 9 and the light-transmitting cover 4 with the projection of the first point light source 5, so as to display a complete intersection line on the target pipeline.

[0036] The right end of the mounting rod 6 is fixed with a horizontal connecting rod 18, the concave mirror 9 is arranged on the connecting rod 18 and is fixed by a nut, the concave mirror 9 has various sizes for replacement, and the concave mirror 9 with a size close to the diameter of the parallel light beam can be selected; the cross section of the connecting rod 18 is a non-circular cross section, so that the rotation of the concave mirror 9 can be avoided.

[0037] The support rod 1 is a multi-stage telescopic cylinder or a multi-stage electric telescopic rod, the upper end of the support rod 1 is fixed to the outer wall of the shell 3, so that the height of the head 2 can be adjusted, and the first point light source 5 is consistent with the axis height of the target pipe.

[0038] In use, first, the placement position of the device is determined: the ratio between the horizontal distance between the first point light source 5 and the axis of the target pipe and the horizontal distance between the first point light source 5 and the axis of the light transmission cover 4 is equal to the ratio between the diameter of the target pipe and the diameter of the light transmission cover 4, then the first point light source 5 is adjusted to the same height as the axis of the target pipe by the support rod 1, and the light transmission cover 4 is parallel to the axis of the target pipe, the horizontal laser range finders can be installed at the left and right ends of the light transmission cover 4, whether the light transmission cover 4 is parallel to the pipe outer wall can be determined by measuring whether the distances between the two ends of the light transmission cover 4 and the pipe outer wall are equal, and the distance between the first point light source 5 and the axis of the target pipe can also be calculated according to the readings of the laser range finders, and details are not described herein.

[0039] After the position of the device is determined, the distance between the second point light source 7 and the right end of the light shielding cylinder 8 is adjusted by screwing the light shielding cylinder 8, so that the diameter of the parallel light beam is adjusted, the closer the distance, the larger the diameter of the parallel light beam, and the diameter value of the parallel light beam corresponding to the position can be marked at the corresponding position of the second rod section 11, so as to facilitate adjustment, and the diameter of the parallel light beam is required to be: the ratio between the diameter of another pipe intersected by the target pipe and the diameter of the parallel light beam is equal to the ratio between the diameter of the target pipe and the diameter of the light transmission cover 4.

[0040] The above adjustment is equivalent to that the intersection of the parallel light beam and the light transmission cover 4 is enlarged to the position of another pipe and the target pipe in a similar ratio according to the center projection principle of the first point light source 5, the parallel light beam corresponds to another pipe intersected by the target pipe, the light transmission cover 4 corresponds to the target pipe, and the intersection line of the parallel light beam and the light transmission cover 4 corresponds to the intersection line of another pipe and the target pipe.

[0041] Since the transmittance or color of the light transmission cover 4 in the area irradiated by the parallel light beam changes, corresponding dark light spots or light spots of different colors will also occur in the intersection line area on the outer wall of the target pipe, the edge of the light spot is the intersection line of another pipe and the target pipe, so that the intersection line is identified.

[0042] When another pipeline intersects with the target pipeline non-perpendicularly, the corresponding angle between the parallel light beam and the light-transmitting cover 4 is adjusted by rotating the second rod segment 11 around the left end hinge bolt 12, and the position of the first point light source 5 is adjusted by the lead screw 13, so that the first point light source 5 is aligned with the center of the irradiation area of the parallel light beam.

[0043] In the area where the first point light source 5 performs center projection or the area where the second point light source 7 reflects light, some rod members, such as the connecting rod 18, block a part of the light of the first point light source 5, and the break points of the intersecting lines on the target pipeline are caused, but this does not affect the display and identification of the intersecting lines.

[0044] The present application simulates the target pipeline by the light-transmitting cover 4 and simulates another pipeline intersecting with the target pipeline by the parallel light beam, so that the intersecting lines between another pipeline and the target pipeline are simulated by the intersecting lines between the parallel light beam and the light-transmitting cover 4, and then the simulated intersecting lines are projected on the target pipeline by the equal-ratio magnification principle of the center projection of the first point light source 5 and the change of the light-transmitting property in the intersecting line area of the light-transmitting cover 4, so that the display and identification are realized, the purpose of representing the intersecting lines of large-diameter pipelines by small devices is achieved, the long rod is not rotated, the stability is good, the use is convenient, the intersecting lines can be completely displayed, the pipelines do not need to be marked point by point and then connected, and the position is directly judged.

Claims

1. A central projection type pipe intersection line marking device, characterized in that, The device includes a head (2) and a support rod (1). The head (2) is fixed to the upper end of the support rod (1). The head (2) includes a hollow shell (3). The shell (3) is a tensile body with its tensile axis along the front-back direction. A light-transmitting cover (4) is fixed to the right end of the shell (3). The light-transmitting cover (4) is made of a reversible color-changing material. The light-transmitting cover (4) is a semi-cylindrical shape cut along the axis, and the axis of the light-transmitting cover (4) is parallel to the tensile axis of the shell (3). The convex surface of the light-transmitting cover (4) faces left. A first point light source (5) is provided inside the shell (3). The first point light source (5) is at the same height as the axis of the light-transmitting cover (4). A parallel beam projection unit is installed on the concave side of the light-transmitting cover (4) via a horizontal mounting rod (6). The parallel beam projection unit can project light onto the light-transmitting cover (4). The color or light transmittance of the light-transmitting cover (4) in the area where the parallel beam is projected will change. The parallel beam projection unit includes a second point light source (7) fixed to the right end of the mounting rod (6). A light-shielding tube (8) is screwed onto the mounting rod (6). The second point light source (7) is located inside the light-shielding tube (8) and on the axis of the light-shielding tube (8). The right end of the light-shielding tube (8) is open. A concave mirror (9) is provided on the right side of the light-shielding tube (8). The second point light source (7) is located at the focal point of the concave mirror (9). The axis of the light-shielding tube (8) coincides with the axis of the concave mirror (9). The light cone projected by the second point light source (7) through the right port of the light-shielding tube (8) illuminates the concave mirror (9) and is reflected by the concave mirror (9) into a parallel beam that illuminates the light-shielding cover.

2. The central projection type pipe intersection marking device according to claim 1, characterized in that, The light-transmitting cover (4) is a reversible photochromic material. The light intensity of the second point light source (7) is greater than that of the first point light source (5). The light from the second point light source (7) is reflected onto the light-transmitting cover (4) by the concave mirror (9), which will cause a significant reduction in the light transmittance of the irradiated area of ​​the light-transmitting cover (4).

3. The central projection type pipe intersection marking device according to claim 1, characterized in that, The light-transmitting cover (4) is a reversible thermochromic material, and the second point light source (7) is a heat source. The light from the second point light source (7) is reflected onto the light-transmitting cover (4) by the concave mirror (9), which will cause a significant color change in the irradiated area of ​​the light-transmitting cover (4).

4. A central projection type pipe intersection marking device according to claim 1, characterized in that, The mounting rod (6) consists of a first rod segment (10) on the left and a second rod segment (11) on the right. The two segments are hinged together by a vertical bolt (12). The first rod segment (10) is fixed on the light-transmitting cover (4). After loosening the bolt (12), the second rod segment (110) can rotate around the hinge axis. The housing (3) is provided with a horizontal lead screw (13) in the front-back direction. A moving block (14) is threaded on the lead screw (13). The first point light source (5) is fixed on the moving block (14).

5. A central projection type pipe intersection marking device according to claim 4, characterized in that, The housing (3) has a sliding rod (15) fixed in the front-to-back direction. The sliding rod (15) passes through the moving block (14), and the moving block (14) can move along the sliding rod (15).

6. A central projection type pipe intersection marking device according to claim 1, characterized in that, The concave mirror (9) has two perpendicularly intersecting coating lines (16) on its surface. The coating lines (16) are non-reflective and will display a crosshair in the area where the parallel beam of light illuminates the light-transmitting cover (4). A laser line light source (17) is fixed below the first point light source (5). The projection point of the laser line light source (17) on the light-transmitting cover (4) is at the same height as the axis of the light-transmitting cover (4) and is aligned with the first point light source (5) to the left and right.

7. A central projection type pipe intersection marking device according to claim 4, characterized in that, The second rod segment (11) is a telescopic rod with adjustable length.

8. A central projection type pipe intersection marking device according to claim 1, characterized in that, The right end of the mounting rod (6) is fixed with a horizontal connecting rod (18). The concave mirror (9) is inserted through the connecting rod (18) and tightened by a nut. The concave mirror (9) has various sizes for replacement. The cross section of the connecting rod (18) is a non-circular cross section.

9. A central projection type pipe intersection marking device according to claim 1, characterized in that, The support rod (1) is a multi-stage telescopic cylinder or a multi-stage electric telescopic rod, and the upper end of the support rod (1) is fixed to the outer wall of the housing (3).

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