Automatic sample shearing device and binding system for bunched combustion experiment

Abstract

The utility model provides an automatic sample shearing device for bunched combustion experiment, which comprises a pay-off part, a shearing part and a control device, the pay-off part comprises a sample disc, a pay-off wheel and a wire outlet wheel, the sample disc is provided with a sample shaft which is used for placing a shaft sample or a disc sample, and the pay-off wheel is used for placing the shaft sample or the disc sample. The rotating speed of the pay-off wheel is controlled by the control device according to the loose state of the tensioner; the shearing part comprises a wire inlet wheel set, a knife rest assembly and a wire outlet wheel set, the knife rest is arranged between the wire inlet wheel set and the wire outlet wheel set, a guide pipe is arranged on the side, close to the knife rest assembly, of the wire inlet wheel set, and the guide pipe is used for guiding a cable to approach a knife edge; the control device determines the cable shearing position based on the transmission speed of the cable and controls the tool rest assembly to act for shearing, and the cable outlet wheel set conveys the sheared cable to a preset position. According to the utility model, manual shearing is changed into automatic shearing, so that the length consistency of samples is ensured, the time is saved, and the testing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of testing technology, and in particular to an automatic sample cutting device and binding system for bundled combustion experiments. Background Technology

[0002] Flame-retardant cables have become an important market choice due to their superior safety. Wire and cable manufacturers have actively researched and produced flame-retardant wire and cable products, achieving significant economic and social benefits. To assess the quality of flame-retardant cables, my country has established standards for flame-retardant cable combustion test methods, such as GB / T 18380.32~18380.36 "Cables and Optical Cables - Flame Propagation Test under Flame Conditions—Vertically Installed Bundled Cables and Wires," which is equivalent to IEC 60332 and primarily evaluates flame-retardant cables based on flame propagation. Standards such as GB / T 31248 "Test Methods for Flame Propagation, Heat Release and Smoke Production Characteristics of Cables or Optical Cables under Harvest Conditions" and EN 50399 assess the flame propagation, calorific value, and smoke production performance of burning cables. Bundled combustion tests (GB / T 18380 series, IEC 60332 series) and heat release tests (GB / T 31248, EN 50399) both involve sample cutting and bundling. Both domestic and international markets are paying close attention to this type of combustion performance, and the testing requirements are quite high. Currently, sample preparation is done manually by cutting and binding the samples. The number of samples required for each test varies depending on the diameter of the specimen; the smaller the diameter, the more samples are needed. Therefore, this experiment requires a significant amount of manpower, and the length deviation caused by manual sampling inevitably reduces the accuracy of the test. Utility Model Content

[0003] This invention provides an automatic sample shearing device for bundled combustion experiments, comprising: a feeding section, a shearing section, and a control device. The feeding section includes a sample tray, a feeding wheel, and a delivery wheel. The sample tray has a sample shaft for holding bundled or trayed samples. The rotation speed of the feeding wheel is controlled by the control device according to the relaxation state of the tensioner. The tensioner is located in front of the feeding wheel, and the feeding wheel is axially parallel to the delivery wheel, with the feeding wheel positioned diagonally above the delivery wheel. The shearing section includes an infeed wheel assembly, a cutter assembly, and a delivery wheel assembly. The cutter assembly is located between the infeed wheel assembly and the delivery wheel assembly. A guide tube is provided on the side of the infeed wheel assembly near the cutter assembly to guide the cable close to the cutting edge. The cable on the sample tray enters the infeed wheel assembly via the feeding wheel and the delivery wheel. The control device determines the cable shearing position based on the cable's transmission speed and controls the cutter assembly to perform the shearing. The delivery wheel assembly transports the sheared cable to a predetermined position.

[0004] Preferably, a guide component is provided on one side of the sample tray, which guides the cable rotating out of the sample tray to the feed reel.

[0005] Preferably, the infeed roller assembly includes at least two sets of vertically opposite rollers, with the distance between the upper roller and the opposite lower roller being adjustable; the outfeed roller assembly includes at least two sets of vertically opposite rollers, with the distance between the upper roller and the opposite lower roller being adjustable.

[0006] Preferably, the shearing section includes a housing that accommodates the infeed wheel assembly, the cutter head assembly, and the outfeed wheel assembly.

[0007] Preferably, a straightener is provided on the side of the infeed reel assembly near the outfeed reel.

[0008] Preferably, the straightener consists of multiple rollers arranged in an alternating vertical direction, with the upper rollers having the same axial direction and the lower rollers having the same axial direction.

[0009] Preferably, the tool holder assembly includes different types of blades, and the control device is configured with the corresponding type of blade according to the sample category.

[0010] This utility model also provides a sample binding system for bundled combustion experiments. The sample binding system includes the aforementioned automatic sample cutting device and binding device. The binding device receives the cables pushed out by the cable delivery wheel group and is triggered by the control device to perform the binding action according to the set number of cables.

[0011] Preferably, the binding device is controlled by a control device to perform binding actions according to the set number of twisted coils and / or binding spacing.

[0012] This invention provides an automatic sample cutting device for bundled combustion experiments. It can automatically cut coiled or spooled cables into predetermined lengths according to predefined requirements, improving upon manual cutting by replacing it with automatic cutting. This ensures consistent sample lengths, saves time, and increases testing efficiency. Furthermore, this invention utilizes a binding device to automatically bundle the cables, significantly improving binding efficiency. During the cable release process, it automatically removes the torque caused by cable entanglement in the coiled or spooled cables. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0014] Figure 1This is a three-dimensional structural diagram of the automatic sample shearing device for bundle combustion experiments provided by this utility model;

[0015] Figure 2 This is a front view schematic diagram of the wire feeding part in the automatic sample shearing device provided by this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of one specific embodiment of the wire-laying part;

[0017] Figure 4 This is a front view schematic diagram of the shearing part in the automatic sample shearing device provided by this utility model;

[0018] Figure 5 This is a three-dimensional structural diagram of one specific embodiment of the sheared portion;

[0019] Figure 6 This is a three-dimensional structural diagram of a binding device used in conjunction with the automatic sample shearing device.

[0020] Figure label:

[0021] The wire feeding section includes: first base 10, sample tray 11, sample shaft 111, wire feeding reel 12, wire exit reel 13, tensioner 14, and guide component 15.

[0022] Shearing section: Infeed wheel assembly 21, cutter holder assembly 22, Outfeed wheel assembly 23, guide tube 24, housing 25, second base 26, support platform 27, straightener 28

[0023] Control section: Human-computer interaction interface 30 Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0025] This invention aims to enable efficient and accurate cutting and bundling of samples in bundled combustion and heat release tests, ensuring accurate sample cutting length and consistent bundling while improving work efficiency and reducing unnecessary waste of human resources.

[0026] This invention provides an automatic sample shearing device for bundled combustion experiments, such as... Figure 1As shown, it includes: a wire feeding section, a shearing section, and a control device (including a human-machine interface 30). The wire feeding section includes a sample tray 11, a wire feeding reel 12, and a wire output reel 13. The sample tray 11 has a sample shaft 111 for placing shaft-formed or tray-formed samples. The rotation speed of the wire feeding reel 12 is controlled by the control device according to the relaxation state of the tensioner. The tensioner 14 is located in front of the wire feeding reel 12. The wire feeding reel 12 is axially parallel to the wire output reel 13, and the wire feeding reel 12 is located diagonally above the wire output reel 13. The shearing section includes... The system includes an infeed reel assembly 21, a cutter assembly 22, and an outfeed reel assembly 23. The cutter assembly 22 is disposed between the infeed reel assembly 21 and the outfeed reel assembly 23. A guide tube 24 is provided on the side of the infeed reel assembly 21 near the cutter assembly. The guide tube 24 is used to guide the cable close to the cutter edge. The cable on the sample tray enters the infeed reel assembly 21 via the pay-off reel 12 and the outfeed reel 13. The control device determines the cable cutting position based on the cable transmission speed and controls the cutter assembly to perform cutting. The outfeed reel assembly 23 conveys the cut cable to a predetermined position.

[0027] This invention improves upon the existing manual wire feeding method by automatically feeding the wire according to the transmission speed, tensioner relaxation state, and sample tray rotation speed set by the user on the human-machine interface of the control device. This achieves the technical effect of saving manpower, greatly saving time, and improving testing efficiency.

[0028] The rotational speed of the feed roller and the rotational speed of the sample tray have a relatively fixed correspondence, ensuring that the cable released from the sample tray is promptly delivered to the output roller via the feed roller. The feed roller is driven by a belt and has two rim grooves. The first rim groove is used to wind and convey the cable released from the sample tray, and the second rim groove is used to wind the belt. Therefore, the rotational speed of the sample tray matches the conveying speed of the belt. The output roller rotates following the feed roller, thereby guiding the cable to the feed roller assembly. Therefore, the output roller does not require a drive device. The sample tray does not require a drive device and can be rotated solely by the rotation of the feed roller, thus achieving automatic cable feeding.

[0029] Preferably, such as Figure 2As shown, a guide component 15 is provided on one side of the sample tray, which guides the cable from the sample tray 11 to the feed reel 12. The guide component 15 can be a horizontal bar fixed to one side of the sample tray, and the horizontal bar is a smooth cylinder. The cable from the sample tray passes through the guide component 15 and winds around the feed reel 12. The guide component 15 can position the cable from the feed reel so that it winds smoothly towards the feed reel. In one specific embodiment, the guide component 15 includes two parallel round rods, the two ends of which are respectively fixed to two vertical columns. The cable from the tray sample or the shaft sample extends to the feed reel through the gap between the two round rods. This arrangement can effectively limit the cable from the sample tray.

[0030] The sample tray 11 is mounted on the base 10 and is rotatable relative to the base. The sample tray has a retaining wall to prevent the tray-shaped or shaft-shaped sample from falling out of the tray. In one specific embodiment, the sample shaft 111 includes a first vertical rod and multiple second vertical rods located at the center of the sample tray. The multiple second vertical rods are evenly arranged along a circumference centered on the center of the sample tray and with a predetermined length as the radius. This embodiment is mainly for fixing the tray-shaped sample to ensure smooth rotation of the sample.

[0031] The faster the feed roller 12 rotates, the tighter the tensioner 14 becomes, and the faster the feed speed of the sample tray 11. This ensures that the feed speed of the sample tray is not affected by the cable weight, thus guaranteeing the accuracy of the shearing length. Furthermore, after the sample passes through the feed roller and the output roller, the torque generated by the sample coiling is relieved, which straightens the sample to a certain extent and ensures smooth automatic shearing in the subsequent process.

[0032] As one specific implementation method, such as Figure 3 As shown, the sample tray is mounted on the first base 10, and the wire inlet wheel 12 and wire outlet wheel 13 are mounted on the columns on the first base 10. The sample tray 11, the wire inlet wheel 12, the wire outlet wheel 13, and the first base 10 constitute the wire feeding section. The wire feeding section and the shearing section are set up relatively independently. This arrangement makes the automatic sample shearing device for bundle combustion experiments more flexible, and the two parts have good synergy due to the overall control performance of the control device.

[0033] As one specific implementation method, such as Figure 4 As shown, the feed roller assembly 21 includes at least two sets of vertically opposite rollers, with the distance between the upper roller and the opposite lower roller being adjustable; the output roller assembly 23 includes at least two sets of vertically opposite rollers, with the distance between the upper roller and the opposite lower roller being adjustable. Through this adjustable distance, the feed roller assembly can accommodate cables of various sizes.

[0034] The cable output from the output wheel enters between the upper and lower rollers of the input wheel assembly 21 and is conveyed to the knife gate of the knife holder assembly 22. In order to realize the cutting action of the knife gate, the cable needs to be supported on both sides of the knife gate. In order to avoid the lower rollers of the input wheel assembly and the output wheel assembly bearing too much downward pressure and the cable bending and deformation caused by the cutting operation, the present invention provides a conduit 24 on the side of the input wheel assembly near the knife gate. The cable output from the input wheel assembly 21 directly enters the conduit 24 and is guided by the conduit to be output to the knife gate. The conduit provides stable support for the cable during the cutting.

[0035] For safety reasons, the feed wheel assembly, cutter post assembly, and output wheel assembly are housed within a housing, specifically the housing 25. The housing 25 is mounted on a second base 26. The housing can have an upward-flipping or downward-flipping cover, which remains closed during cutting operation or when the machine is off. The cover can be opened for inspection, monitoring, or maintenance. An output port is located on the side of the housing near the output wheel assembly, through which the cut cable is output to the support platform 27. An input port is located on the side of the housing near the feed wheel assembly, through which the cable output from the cable feeding section enters the feed wheel assembly.

[0036] Preferably, the blade holder assembly includes different types of blades, and the control device configures the corresponding type of blade according to the sample type, so that the blades of the cutting part can be adapted to various types of cables, ensuring that the automatic sample cutting device has a wide range of applications.

[0037] To accommodate various strength requirements of optical cable samples, different types of switches can be selected for the switch assembly based on the sample type: for high-strength samples, switches made of high-strength steel are used; for aramid-reinforced samples with good flexibility, switches with serrated edges are customized using the principle of special aramid scissors; and ordinary switches are used for ordinary copper cables.

[0038] As one specific implementation method, such as Figure 4 , 5 As shown, a straightener 28 is provided on the side of the infeed reel assembly 21 near the outfeed reel 13, or on the outer side of the housing with the infeed port. The cable output from the outfeed reel is straightened by the straightener 28 and then enters the infeed reel assembly inside the housing through the infeed port. Preferably, as shown... Figure 5As shown, the straightener consists of multiple rollers arranged in a staggered vertical direction, with the upper rollers and lower rollers having their axes aligned on the same horizontal plane. The straightener 28 ensures the cable is straight before cutting, facilitating its entry into the conduit, and also ensures the cable is straight after cutting, facilitating subsequent bundling. To ensure the cable stably enters the feed roller assembly from the feed section, a limiting component 29 is provided in front of the straightener 28 to limit the cable's movement.

[0039] To facilitate user setup, a display screen 30 with a human-machine interface is installed on the outside of the enclosure. Through this human-machine interface, users can set the transmission speed of the cables, the number of cables in each bundle, and their length.

[0040] The support platform 27 is connected to the cutting section, and the support platform is equipped with a belt for conveying the cut cable to a predetermined position for bundling.

[0041] This utility model also provides a sample binding system for bundled combustion experiments. The sample binding system includes the aforementioned automatic sample cutting device and binding device, such as... Figure 6 As shown, the bundling device receives the cables pushed out by the cable delivery wheel assembly, and the control device triggers the bundling action according to the set number of cables. The bundling device can be set at a predetermined position on the support platform. The cut cables can be conveyed to the predetermined position by a belt on the support platform and an additional guide component. When the cumulative number of cut cables reaches a predetermined quantity, the control device triggers the bundling device to perform the bundling action.

[0042] In the human-machine interface, the user can set the bundling speed, number of twists and bundling spacing. The control device controls the bundling device to perform bundling actions according to the set bundling speed, number of twists and bundling spacing. Generally, the bundling time is 30 seconds per cable bundle.

[0043] Cable bundles formed by bundling cables are generally used in heat release experiments. Therefore, the automatic sample cutting device and bundling system for bundled combustion experiments proposed in this invention are generally used in laboratory, testing and measurement scenarios.

[0044] As a specific example, a cable sample with a diameter of 3mm and a conductor diameter of 1.5mm is bundled together. The required sample quantity and technical effects for the bundled Class A test and heat release test are as follows:

[0045]

[0046] As can be seen from the table above, the automatic bundling system proposed in this invention is suitable for bundling needs in various experiments, greatly improves work efficiency, and has beneficial technical effects.

[0047] In this invention, the automatic sample cutting device for bundled combustion experiments uses a belt and transmission rollers to drive the cable and rotate the sample shaft. The cable length is determined by the transmission speed to cut the cable, thus achieving automatic cable feeding and automatic cutting.

[0048] The automatic sample cutting device for bundled combustion experiments provided by this utility model can automatically cut coiled or spooled cables into cable segments of predetermined lengths according to predetermined requirements, and can automatically bundle the cables using a binding device; during the cable release process, it automatically removes the torque caused by the cable winding of the coiled or spooled cables.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sample automatic cutting device for a bundled combustion experiment, characterized by comprising: The application relates to a sample automatic shearing device and a bundling device. The sample automatic shearing device comprises a sample disc, a pay-off wheel and a take-off wheel, the sample disc is provided with a sample shaft for placing a shaft sample or a disc sample, the rotating speed of the pay-off wheel is controlled by a control device according to the relaxation state of a tensioner, the tensioner is arranged in front of the pay-off wheel, the pay-off wheel is axially parallel to the take-off wheel, and the pay-off wheel is arranged obliquely above the take-off wheel; the shearing part comprises an incoming wheel set, a cutter holder assembly and a take-off wheel set, the cutter holder is arranged between the incoming wheel set and the take-off wheel set, a guide pipe is arranged on the side of the incoming wheel set close to the cutter holder assembly, and the guide pipe is used for guiding a cable to approach a cutter. The cable on the sample disc enters the incoming wheel set via the pay-off wheel and the take-off wheel, the control device determines the cable shearing position based on the transmission speed of the cable, and controls the cutter holder assembly to act to shear, and the take-off wheel set transmits the sheared cable to a predetermined position.

2. The sample automatic cutting apparatus according to claim 1, characterized by A guide part is arranged on one side of the sample disc, and the guide part guides the cable turned out of the sample disc to the pay-off wheel.

3. The sample automatic cutting apparatus according to claim 1, wherein The incoming wheel set comprises at least two groups of upper and lower opposite rollers, the spacing between the upper roller and the opposite lower roller is adjustable, the take-off wheel set comprises at least two groups of upper and lower opposite rollers, and the spacing between the upper roller and the opposite lower roller is adjustable.

4. The sample automatic cutting apparatus according to claim 1 or 3, characterized by The shearing part comprises a box body, and the box body accommodates the incoming wheel set, the cutter holder assembly and the take-off wheel set.

5. The sample automatic cutting apparatus according to claim 1, wherein A straightener is arranged on the side of the incoming wheel set close to the take-off wheel.

6. The sample automatic cutting apparatus according to claim 5, wherein The straightener is composed of a plurality of rollers arranged axially staggered upwards and downwards, the upper rollers are axially arranged in the same horizontal plane, and the lower rollers are axially arranged in the same horizontal plane.

7. The sample automatic cutting apparatus according to claim 1, wherein The cutter holder assembly comprises different types of gate cutters, and the control device configures the gate cutters of the corresponding type according to the sample category.

8. The sample automatic cutting apparatus according to claim 1, wherein The control device controls the action of the cutter holder assembly according to the set transmission speed, the shearing number and the shearing length.

9. A sample binding system for bundled combustion experiments, characterized by, The sample bundling system comprises the sample automatic shearing device and the bundling device, the bundling device receives the cable pushed out by the take-off wheel set, and the control device triggers the bundling action according to the set cable number.

10. The specimen binding system of claim 9, wherein, The bundling device performs the bundling action through the number of twisted loops and the bundling spacing set by the control device.

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