Cable combustion binding wire spacing ruler

Abstract

The invention relates to the technical field of spacing rulers, and discloses a cable combustion binding wire spacing ruler. The caliper comprises a caliper body and a sliding frame slidably arranged on the caliper body in a sleeving mode, the caliper body comprises a short ruler frame and a detachable straight steel ruler fixedly arranged on the ruler frame, and therefore the straight steel ruler can be independently taken out and can be conveniently and independently submitted for inspection during calibration; the sliding frame and the caliper body are respectively provided with a handle which enables the spacing ruler to be operated more conveniently, and a tension spring which enables the spacing ruler to return to zero automatically is further arranged between the sliding frame and the caliper frame. According to the invention, the caliper body and the carriage part thereof are improved, so that the whole caliper body is shorter and smaller while normal spacing detection is ensured, and the tension spring capable of enabling the spacing ruler to automatically return to zero and the grip capable of enabling the spacing ruler to be easier to control are added. A distance measuring tool which is specially used for measuring the distance between cables in bunched combustion and heat release tests and is portable and easy to operate is formed.

Description

Technical Field

[0001] The invention relates to the technical field of spacing rulers, in particular to a cable burning binding wire spacing ruler. Background Art

[0002] In the wire and cable industry, bundle combustion and heat release tests are standards for inspecting the combustion performance of cables. They evaluate the combustion characteristics of cables (especially power or communication cables) when laid in bundles, including flame spread rate, combustion range, smoke generation, etc., simulating the scene of concentrated combustion of multiple cables in a real fire. The wire binding spacing is an important factor affecting the combustion results.

[0003] Bundled combustion and heat release tests are important indicators of flame-retardant cables and are relatively frequent test items. The determination of the binding wire spacing directly affects the combustion results (the binding wire spacing is related to the cable outer diameter, and the bundled spacing is 0.5 times the outer diameter (D) but not more than 20mm. The heat release spacing is the outer diameter D but not more than 20mm). Therefore, when conducting bundled combustion and heat release tests, it is necessary to frequently use a vernier caliper to measure and determine the spacing of the bundled burning binding wires (during the test, the sample cable is generally tied to a steel ladder, and then the spacing between the cables is measured using a vernier caliper). However, the existing vernier caliper is not compact enough, and is not easy to carry or operate, which makes it inconvenient to carry and perform measurements during the wire binding process. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a cable burning binding wire spacing ruler.

[0005] The present invention is implemented by the following technical solution: a caliper body and a slide slidably mounted on the caliper body, the caliper body including a short ruler frame and a detachable steel ruler fixedly mounted on the ruler frame, so that the steel ruler can be taken out separately, which is convenient for separate inspection during calibration; both the slide and the caliper body are provided with handles that make the spacing ruler more convenient to operate, and a tension spring is also provided between the slide and the ruler frame to allow the spacing ruler to automatically return to zero.

[0006] As a further improvement of the above solution, a locking device is also provided on the slide, which includes a push bar slidably set on the slide and with its bottom in contact with the top of the ruler frame, and a screw threadedly installed on the slide for tightening the push bar.

[0007] As a further improvement of the above solution, two elastic plates for limiting the steel ruler are provided on the ruler frame.

[0008] As a further improvement of the above solution, a left measuring end is provided on the ruler frame, and a right measuring end parallel to the left measuring end is provided on the slide.

[0009] As a further improvement to the above solution, a hand rope is fixedly connected to the ruler frame for easy holding and preventing the spacing ruler from falling.

[0010] As a further improvement to the above scheme, correction frames are provided on both the left and right measuring ends, which can be automatically retracted and extended according to the separation and combination of the two. In this way, when the spacing ruler measures the spacing between two cables, the correction frame can be used to calibrate whether the spacing ruler and the two cables are perpendicular to each other, thereby ensuring the accuracy of the spacing measurement.

[0011] As a further improvement of the above solution, an articulated frame is hingedly provided on the left and right measuring ends for controlling the retraction and extension of the correction frame and for buffering the zeroing of the spacing ruler. The bottom end of the correction frame is provided with an arc-shaped protrusion that can cooperate with the articulated frame.

[0012] As a further improvement of the above-mentioned scheme, the articulated frame includes a main connecting bar rotatably mounted on the left measuring end and longitudinally slidingly connected to the right measuring end, and an auxiliary connecting bar rotatably mounted on the main connecting bar and longitudinally slidingly connected to the left measuring end. The main connecting bar and the auxiliary connecting bar are fixedly embedded with a first magnet, and the bottom ends of the two correction frames are fixedly embedded with a second magnet that can be adsorbed and cooperated with the two first magnets.

[0013] As a further improvement of the above solution, a third magnet is fixedly embedded on the left measuring end and the right measuring end, and an iron block affected by the magnetic force and cooperating with the third magnet is fixedly embedded on the bottom ends of the two correction frames.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention improves the main scale body of an existing vernier caliper into a caliper body consisting of a short scale frame and a detachable steel ruler. A tension spring that automatically resets the distance scale to zero and a handle that makes the distance scale easier to manipulate are provided on the slide and the caliper body. This creates a spacing measurement tool specifically for measuring cable spacing in bundled combustion and heat release tests. Compared to existing vernier calipers, the present invention is not only lightweight, compact, and easy to carry, but also convenient and easy to operate. By arranging correction frames on the left and right measuring ends of the spacing ruler that can be automatically retracted and extended according to the measurement and zeroing of the spacing ruler, and providing an articulated frame for controlling the automatic retraction and extension of the two correction frames, and a first magnet and a second magnet cooperating with the articulated frame, when the spacing ruler measures the distance between two cables, the correction frames can be used to check whether the spacing ruler and the two cables are perpendicular, thereby avoiding the deviation of the spacing ruler during measurement and affecting the measurement accuracy. At the same time, the automatic retraction of the two correction frames also does not affect the compactness, portability and ease of use of the spacing ruler. In addition, the correction frames cooperate with the articulated frame to cushion the collision between the ruler frame and the slide when the spacing ruler is zeroed, thereby avoiding the accuracy of the spacing ruler being affected by violent collision. By arranging a third magnet on the left measuring end and the right measuring end, and arranging an iron block that can cooperate with the third magnet on the correction frame, the iron block on the correction frame can be adsorbed by the third magnet after the correction frame is rotated 90 degrees and unfolded, thereby ensuring the stability of the correction frame after it is unfolded and avoiding shaking of the correction frame during measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a first front view of the cable burning wire binding distance ruler of the present invention; Figure 2 This is a second front view of the cable burning wire binding spacing ruler of the present invention; Figure 3 This is a rear view of the cable burning wire binding spacing ruler of the present invention; Figure 4 This is a disassembled display diagram of the ruler frame, slide frame, articulated frame and correction frame of the cable burning wire binding spacing ruler of the present invention; Figure 5 The diagram shows the disassembly of the ruler frame and the elastic plate of the cable burning wire binding spacing ruler of the present invention; Figure 6 This is a diagram showing the carriage of the cable burning wire binding spacing ruler of the present invention; Figure 7 A partial cross-sectional view of a carriage of the cable burning wire binding spacing ruler of the present invention; Figure 8 This is a front view and a partial enlarged view of the cable burning wire spacing ruler of the present invention; Figure 9 A side cross-sectional view showing the left measuring end, right measuring end, articulated frame, and correction frame of the cable burning wire binding spacing ruler of the present invention; Figure 10 This is a side view, sectional, and disassembled display of the left measuring end, right measuring end, articulated frame, and correction frame of the cable burning wire binding spacing ruler of the present invention.

[0016] Description of main symbols: 1. Ruler frame; 101. Left measuring end; 2. Steel ruler; 3. Elastic plate; 4. Slide; 401. Right measuring end; 5. Tension spring; 6. Twist screw; 7. Abutment bar; 8. Handle; 9. Articulated frame; 901. Main connecting bar; 902. Auxiliary connecting bar; 903. Slide groove; 904. Slider; 905. First magnet; 906. Third magnet; 10. Correction frame; 1001. Arc-shaped protrusion; 1002. Second magnet; 1003. Iron block. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Please combine Figures 1 to 10The cable burning binding wire spacing ruler includes: a caliper body and a slide 4 slidably mounted on the caliper body. The caliper body includes a short ruler frame 1 and a detachable steel ruler 2 fixedly mounted on the ruler frame 1, so that the steel ruler 2 can be taken out separately, which is convenient for separate inspection during calibration. The material of the entire spacing ruler is 304 stainless steel that is not affected by magnetism. Both the slide 4 and the caliper body are provided with a handle 8 that makes the operation of the spacing ruler more convenient. A tension spring 5 is also provided between the slide 4 and the ruler frame 1 to allow the spacing ruler to automatically return to zero. Both the slide 4 and the ruler frame 1 are provided with an intermediate groove and a zeroing spring screw hole passing through the intermediate groove. The internal thread of the zeroing spring screw hole is installed with a bolt for limiting the tension spring 5.

[0019] Through the above technical solution, the main scale body of the existing vernier caliper is improved into a caliper body consisting of a short scale frame 1 and a detachable steel ruler 2, and a tension spring 5 that allows the spacing ruler to automatically return to zero and a handle 8 that makes the spacing ruler easier to operate are provided on the slide 4 and the caliper body. In this way, a spacing measurement tool specially used for measuring the spacing between cables in bundled combustion and heat release tests is formed. Compared with the existing vernier caliper, the spacing measurement tool is not only lightweight, compact and easy to carry, but also convenient and easy to use.

[0020] The slide 4 is also provided with a locking device, which includes a push bar 7 that is slidably arranged on the slide 4 and whose bottom contacts the top of the ruler frame 1, and a screw 6 that is threadedly installed on the slide 4 and is used to tighten the push bar 7.

[0021] Two tension plates 3 for limiting the steel ruler 2 are provided on the ruler frame 1. The tension plates 3 are fixedly connected to the ruler frame 1 through tension bolts, thereby pressing the steel ruler 2 against the ruler frame 1. In addition, handle screw holes are provided on the slide 4 and the tension plate 3 near one end of the hand rope, and the bottom ends of the two handles 8 are threadedly connected to the two handle screw holes respectively.

[0022] A left measuring end 101 is provided on the ruler frame 1, and a right measuring end 401 is provided on the slide 4 in parallel with the left measuring end 101. The lengths of the two measuring ends are lengthened compared to the inner measuring claws of the vernier caliper, so as to facilitate the measurement of the spacing of cables with large outer diameters.

[0023] A hand rope is fixedly connected to the ruler frame 1 for convenient holding and preventing the spacing ruler from falling. A hand ring groove is provided on the ruler frame 1, and the hand rope is tied to the hand ring groove.

[0024] The left measuring end 101 and the right measuring end 401 are both provided with a calibration frame 10 that can be automatically retracted and extended according to the separation and combination of the two. In this way, when the spacing ruler is measuring the spacing between two cables, the calibration frame 10 can be used to check whether the spacing ruler and the two cables are perpendicular to each other, thereby ensuring the accuracy of the spacing measurement. In addition, the frame body of the calibration frame 10 is a frame structure, which can minimize its weight while ensuring its own structural stability. The left measuring end 101 and the right measuring end 401 are both provided with a storage slot for accommodating the calibration frame 10. The left measuring end 101 and the right measuring end 401 are hingedly provided with a device for controlling the retraction and expansion of the calibration frame 10. The articulated frame 9 is placed and can buffer the zeroing of the spacing ruler. The bottom end of the correction frame 10 is provided with an arc-shaped protrusion 1001 that can cooperate with the articulated frame 9. The articulated frame 9 includes a main connecting bar 901 rotatably mounted on the left measuring end 101 and longitudinally slidingly connected to the right measuring end 401, and an auxiliary connecting bar 902 rotatably mounted on the main connecting bar 901 and longitudinally slidingly connected to the left measuring end 101. The main connecting bar 901 and the auxiliary connecting bar 902 are both fixedly embedded with a first magnet 905. The bottom ends of the two correction frames 10 are both fixedly embedded with a second magnet 1002 that can be adsorbed and matched with the two first magnets 905. A slide groove 903 is provided on the side where the left measuring end 101 and the right measuring end 401 are close to each other, and a slider 904 is provided on the side where the main connecting bar 901 and the auxiliary connecting bar 902 are away from each other. The two sliders 904 extend into the corresponding slide groove 903 respectively and are slidably connected thereto.

[0025] Through the above technical solution, when the spacing ruler measures the spacing between two cables, the correction frame 10 can be used to check whether the spacing ruler is perpendicular to the two cables, thereby avoiding the spacing ruler from being offset during measurement and affecting the measurement accuracy. At the same time, the automatic retraction and extension characteristics of the two correction frames 10 also ensure that they do not affect the compactness, portability and ease of use of the spacing ruler. Moreover, the correction frame 10 cooperates with the articulated frame 9 to cushion the collision between the ruler frame 1 and the slide 4 when the spacing ruler is reset to zero, thereby avoiding the spacing ruler from being affected by the accuracy due to violent collision.

[0026] A third magnet 906 is fixedly embedded on the left measuring end 101 and the right measuring end 401, and an iron block 1003 that is affected by magnetic force and cooperates with the third magnet 906 is fixedly embedded at the bottom end of the two correction frames 10. The iron block 1003 can also be made of other magnetic materials or magnets that are affected by magnetic force, but considering that the exposed magnet may absorb magnetic impurities, it is generally not the first choice.

[0027] Through the above technical solution, after the calibration frame 10 is rotated 90 degrees and unfolded, the iron block 1003 thereon can be attracted by the third magnet 906, thereby ensuring the stability of the calibration frame 10 after unfolding and preventing the calibration frame 10 from shaking during measurement.

[0028] The implementation principle of a cable burning binding wire spacing ruler in the embodiment of the present application is: When conducting the bundled combustion and heat release tests, first tie the cables to a steel ladder (for the heat release test, a section of the tested sample is used to directly calibrate the spacing, but a vernier caliper is still required for cables with an outer diameter exceeding 20mm); When testing the cable spacing, hold the two handles 8 with your hands, then place the measuring end of the spacing ruler between the two cables and start to tighten the handles 8. At this time, the slide 4 drives the right measuring end 401 to move and stretches the tension spring 5 until the left measuring end 101 and the right measuring end 401 respectively touch the two cables. At this time, the distance mark on the slide 4 corresponds to the value of the steel ruler 2, which is the spacing between the two cables. After the detection is completed and the grip 8 is released, the slide 4 will be pulled back to zero by the tension spring 5. When it is necessary to lock the detection value of the current spacing ruler, the screw 6 can be turned. The screw 6 is pressed against the ruler frame 1 through the abutment bar 7, thereby realizing the limiting work of the ruler frame 1 and the slide 4, so that the spacing ruler can be kept in the current state; At the same time, when the slide 4 drives the right measuring end 401 to separate from the left measuring end 101 on the ruler frame 1, it will also synchronously pull the main connecting bar 901, so that one end of the main connecting bar 901 and the auxiliary connecting bar 902 move upward and change from a vertical state to an inclined state. When the articulated frame 9 is tilted, it will pull the second magnet 1002 on the correction frame 10 through the first magnet 905. At this time, the correction frame 10, which has lost its restriction, unfolds from the vertical state to the parallel state, and cooperates with the left measuring end 101 and the right measuring end 401 to abut against the cable, thereby preventing the spacing ruler from being deflected when measuring the distance between two cables, thereby affecting the measurement accuracy. When the spacing ruler is reset to zero, the articulated frame 9 is reset and presses down the arc-shaped protrusions 1001 on the two correction frames 10. At this time, not only can the two correction frames 10 be reset and stored, but the resistance generated by the articulated frame 9 when driving the correction frames 10 to be stored will also have a buffering effect on the reset of the spacing ruler, avoiding the slide 4 from violently colliding with the ruler frame 1 under the rebound of the tension spring 5 and affecting the spacing ruler (violent collision can easily cause mechanical damage and loosening of the connecting parts, which will affect the measurement accuracy of the spacing ruler).

[0029] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A cable burning wire binding distance ruler, comprising a caliper body and a slide (4) slidably mounted on the caliper body, characterized in that: The caliper body comprises a short ruler frame (1) and a detachable steel ruler (2) fixedly arranged on the ruler frame (1), so that the steel ruler (2) can be taken out separately, and is convenient for separate inspection during calibration; The slide (4) and the caliper body are both provided with a grip (8) for making the operation of the spacing ruler more convenient. A tension spring (5) is also provided between the slide (4) and the ruler frame (1) for automatically returning the spacing ruler to zero.

2. The cable burning binding wire spacing ruler according to claim 1, characterized in that: The slide (4) is also provided with a locking device, which includes a push bar (7) slidably provided on the slide (4) and with its bottom in contact with the top of the ruler frame (1), and a screw (6) threadedly mounted on the slide (4) for tightening the push bar (7).

3. The cable burning binding wire spacing ruler according to claim 1, characterized in that: Two elastic plates (3) for limiting the steel ruler (2) are provided on the ruler frame (1).

4. The cable burning binding wire spacing ruler according to claim 1, characterized in that: The ruler frame (1) is provided with a left measuring end (101), and the slide frame (4) is provided with a right measuring end (401) parallel to the left measuring end (101).

5. The cable burning binding wire spacing ruler according to claim 1, characterized in that: A hand rope is fixedly connected to the ruler frame (1) for convenient holding and preventing the spacing ruler from falling.

6. The cable burning binding wire spacing ruler according to claim 4, characterized in that: The left measuring end (101) and the right measuring end (401) are both provided with a correction frame (10) that can be automatically retracted and extended according to the separation and combination of the two. In this way, when the spacing ruler is measuring the distance between two cables, the correction frame (10) can be used to check whether the spacing ruler and the two cables are perpendicular, thereby ensuring the accuracy of the spacing measurement.

7. The cable burning binding wire spacing ruler according to claim 6, characterized in that: The left measuring end (101) and the right measuring end (401) are hingedly provided with an articulated frame (9) for controlling the retraction and extension of the correction frame (10) and for buffering the zeroing of the spacing ruler. The bottom end of the correction frame (10) is provided with an arc-shaped protrusion (1001) that can cooperate with the articulated frame (9).

8. The cable burning binding wire spacing ruler according to claim 7, characterized in that: The articulated frame (9) comprises a main connecting bar (901) rotatably mounted on the left measuring end (101) and longitudinally slidably connected to the right measuring end (401), and an auxiliary connecting bar (902) rotatably mounted on the main connecting bar (901) and longitudinally slidably connected to the left measuring end (101), wherein first magnets (905) are fixedly embedded in the main connecting bar (901) and the auxiliary connecting bar (902), and second magnets (1002) capable of adsorbing and cooperating with the two first magnets (905) are fixedly embedded in the bottom ends of the two correction frames (10).

9. The cable burning binding wire spacing ruler according to claim 7, characterized in that: A third magnet (906) is fixedly embedded on both the left measuring end (101) and the right measuring end (401), and an iron block (1003) that is affected by magnetic force and cooperates with the third magnet (906) is fixedly embedded on the bottom ends of the two correction frames (10), so that when the correction frames (10) are in the unfolded state, the third magnet (906) can be attracted to the iron block (1003) to ensure the stability of the correction frames (10) in the unfolded state.

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