A feeding device for a cone crusher

Abstract

This utility model discloses a feeding device for a cone crusher, relating to the field of mineral processing equipment technology. To solve the problem that existing cone crusher feeding devices cannot quickly correct worn feed sleeves without disassembling the feed box or stopping the machine, this cone crusher feeding device includes: a support beam; a feed box placed on the support beam; and a feed sleeve located in the feed box for guiding the material in the feed box to the center of the boom cap. This configuration allows for rapid correction of worn feed sleeves without disassembling the feed box or stopping the machine, ensuring that ore always falls evenly into the center of the boom cap, significantly shortening adjustment time and improving operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mineral processing equipment technology, and more specifically, to a feeding device for a cone crusher. Background Technology

[0002] As a key crushing equipment in the vanadium-titanium magnetite beneficiation process, the stability of the cone crusher's feeding device directly affects crushing efficiency and production costs. Existing cone crusher feeding devices typically adopt a fixed cylindrical feed box structure. The ore is guided to the center of the crusher boom cap through a feed sleeve fixed at the bottom of the box. The rotation of the boom cap evenly distributes the material into the crushing chamber to achieve uniform and full feeding.

[0003] However, in actual production operations, it was found that the feed sleeve is prone to wear and deformation due to long-term impact from the ore flow. If its relative position is not adjusted in time, the ore drop point will deviate from the center of the boom cap, causing feed skew and material distribution imbalance, resulting in significant fluctuations in the crusher's working pressure and power, and causing segregation of lumps and powders within the crushing chamber. Prolonged lump and powder separation causes excessive compression of the liner plates in the coarse particle concentration area, while the fine particle concentration area is repeatedly subjected to dry-firing, leading to significant localized wear of the liner plates. Adjusting the position of the feed sleeve can solve these problems; however, the existing feed box and support beam are fixed by bolts. Adjustment requires first removing the feed box cover and cleaning the accumulated ore inside the feed box, and then manually moving the feed sleeve. Each adjustment necessitates a system shutdown, making the process cumbersome and time-consuming.

[0004] Therefore, how to solve the problem that the existing cone crusher feeding device cannot quickly correct the worn feed sleeve without disassembling the box or stopping the machine is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a feeding device for a cone crusher that can quickly correct the worn feed sleeve without disassembling the box or stopping the machine, so that the ore always falls evenly into the center of the boom cap, significantly shortening the adjustment time and improving the operating efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A feeding device for a cone crusher, comprising:

[0008] Support beam;

[0009] The feed hopper is placed on the supporting crossbeam;

[0010] The lower sleeve, located in the feed box, is used to guide the material in the feed box to the center of the boom cap.

[0011] In some embodiments, the bottom plate of the feed box has a through hole, and the ore lowering sleeve passes through the through hole and overlaps the bottom plate so that the ore lowering sleeve is suspended in the feed box.

[0012] In some embodiments, the downhole sleeve includes a sleeve body and an overlapping portion extending outward along the outer periphery of the sleeve body.

[0013] In some embodiments, the sleeve body is a cylindrical structure.

[0014] In some embodiments, the feed box is a rectangular box.

[0015] In some embodiments, the feed box is provided with a guiding structure, which is a conical structure, used to guide the material entering the feed box to the through hole.

[0016] In some embodiments, the material guiding structure includes a material guiding plate, one end of which is connected to the inner wall of the feeding box, and the other end extends toward the bottom plate and connects to the bottom plate. A material stacking space is provided between the material guiding plate and the edge of the through hole.

[0017] In some embodiments, a feed inlet is provided on one side of the feed box, and guide plates are provided on the inner walls of the other three sides.

[0018] In some embodiments, a secondary ore outlet is provided on the side of the bottom plate near the feed inlet, and the secondary ore outlet is provided with a secondary sluice chute.

[0019] In some embodiments, the supporting beam is an I-beam.

[0020] The feeding device for a cone crusher provided by this utility model includes a support beam, a feed box, and a discharge sleeve. Specifically, the feed box is placed on the support beam, and the discharge sleeve is located on the feed box to guide the material in the feed box to the center of the boom cap. The feed box rests on the support beam solely by its own weight, without any bolts or welding connections to the support beam. When the discharge sleeve is worn and deformed by the impact of the ore flow, the feed box and discharge sleeve can be lifted as a whole at once. The concentricity of the discharge sleeve outlet and the boom cap can be quickly calibrated by translation, ensuring that the ore always falls evenly into the center of the boom cap. Compared with existing technologies, this eliminates the cumbersome steps of stopping the machine, removing the cover, and cleaning the material. It allows for rapid correction of the worn discharge sleeve without disassembling the feed box or stopping the machine, significantly shortening the adjustment time and improving operating efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of 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 only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the feeding device of the cone crusher provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the feed box of the feeding device for the cone crusher provided by this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the feed sleeve of the cone crusher provided by this utility model.

[0025] Figure label:

[0026] 1-Supporting crossbeam;

[0027] 2-Feed box, 21-Through hole, 22-Feed inlet, 23-Secondary funnel outlet;

[0028] 3-Lowering sleeve, 31-Sleeve body, 32-Overlap joint;

[0029] 4-Arm cap;

[0030] 5-Guide plate;

[0031] 6-Secondary chute;

[0032] 7- Upper boom;

[0033] 8-Upper frame assembly. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] It should be noted that the directional terms such as "front," "back," "left," and "right" used below are defined based on the accompanying drawings in the instruction manual.

[0037] The core of this utility model is to provide a feeding device for a cone crusher, which can quickly correct the worn feed sleeve 3 without disassembling the box or stopping the machine, so that the ore always falls evenly into the center of the boom cap 4, significantly shortening the adjustment time and improving the operating efficiency.

[0038] After the ore enters the feed box 2 of the feeding device, it is fed to the center of the boom cap 4 of the upper frame assembly 8 through the lower ore sleeve 3. The boom cap 4 is stably supported by the upper boom 7. The ore is then evenly distributed into the crushing chamber through the boom cap 4, realizing the operation of the cone crusher with uniformly filled feed.

[0039] Please refer to Figure 1 A feeding device for a cone crusher includes a support beam 1, a feed box 2, and a feed sleeve 3.

[0040] Specifically, the feed box 2 is placed on the support beam 1, and the ore lowering sleeve 3 is located on the feed box 2 to guide the material in the feed box 2 to the center of the boom cap 4. The feed box 2 rests on the support beam 1 solely by its own weight, without any bolts or welding connections to the support beam 1. When the ore lowering sleeve 3 is worn and deformed by the impact of the ore flow, the feed box 2 and the ore lowering sleeve 3 can be lifted as a whole at once. The concentricity of the outlet of the ore lowering sleeve 3 and the boom cap 4 can be quickly calibrated by translation, ensuring that the ore always falls evenly into the center of the boom cap 4. Compared with existing technologies, this eliminates the cumbersome steps of stopping the machine, removing the cover, and cleaning the material. It allows for rapid correction of the worn ore lowering sleeve 3 without disassembling the feed box or stopping the machine, significantly shortening the adjustment time and improving operational efficiency.

[0041] It should be noted that changing the installation method of the feed box 2 to a movable type allows it to move back and forth and left and right on the supporting beam 1 via hoisting, significantly improving adjustment efficiency. When the ore sleeve 3 needs to be corrected due to wear, there is no need to stop the machine or disassemble the equipment; simply adjusting the position of the feed box 2 via hoisting ensures that the ore falls precisely into the center of the boom cap 4. This design greatly reduces adjustment time and maintenance costs, improving equipment operating efficiency. The movable installation method allows the feed box 2 to move on the supporting beam 1, enhancing the flexibility and adaptability of the equipment. Whether during equipment installation, commissioning, or daily operation, this design can quickly adapt to different working conditions, ensuring that the equipment is always in optimal operating condition. The movable installation method, combined with the lifting ring design, makes the movement and adjustment of the feed box 2 simple and quick. Compared with the traditional fixed installation, there is no need for complex bolt disassembly or equipment disassembly, significantly reducing downtime. At the same time, the lifting ring design allows for "one-hook and go," reducing the labor intensity of maintenance personnel and improving operational safety. By quickly adjusting the position of the feed box 2, the deviation in ore drop point caused by wear of the ore lowering sleeve 3 can be corrected in a timely manner, avoiding local impact on the boom cap 4 and liner plate due to uneven load, thereby extending the service life of vulnerable parts and reducing equipment operating costs.

[0042] The feeding device of the cone crusher configured in the above manner can be quickly and accurately adjusted after the wear of the lower sleeve 3, ensuring that the ore always falls evenly and stably into the center of the boom cap 4, thereby realizing the efficient "uniformly filled feeding" operation mode of the cone crusher, significantly reducing equipment operating costs, reducing frequent downtime maintenance due to wear, and ensuring crushing effect and production continuity, providing stable and reliable equipment support for mine production.

[0043] Please refer to Figure 2 The bottom plate of the feed box 2 has a through hole 21, and the ore lowering sleeve 3 passes through the through hole 21 and overlaps the bottom plate so that the ore lowering sleeve 3 is suspended in the feed box 2.

[0044] It should be noted that the ore lowering sleeve 3 is suspended from the through hole 21 of the bottom plate of the feed box 2 via an overlapping joint, forming a stable suspension structure. This allows the sleeve to better withstand the impact force of falling ore during operation, while avoiding stress concentration problems caused by fixed connections (such as welding or bolting), thus extending the service life of the sleeve and the bottom plate. Because the ore lowering sleeve 3 is installed via an overlapping joint, its position can be adjusted without disassembly or cutting. When the ore lowering sleeve 3 needs correction due to wear or misalignment, correction can be completed simply by moving the feed box 2, without stopping the machine for cleaning or disassembling the equipment, greatly improving the operating efficiency of the equipment. The suspended structure makes the replacement and maintenance of the ore lowering sleeve 3 more convenient. When the ore lowering sleeve 3 needs to be replaced, it can be quickly disassembled and replaced simply by loosening the overlapping part 32, reducing maintenance time and labor intensity. The ore lowering sleeve 3 fits tightly with the bottom plate through the overlapping part 32, forming a natural sealing structure. This design effectively prevents ore leakage from the gap between the ore lowering sleeve 3 and the bottom plate, reducing ore waste and the risk of equipment failure.

[0045] Among them, the through hole 21 is an elliptical hole, which provides a larger horizontal adjustment range for the lower sleeve 3. Compared with a circular hole, the elliptical hole allows for a greater range of translational adjustment of the lower sleeve 3 along its major axis, thereby enabling more precise correction of the concentricity between the outlet of the lower sleeve 3 and the boom cap 4. The elliptical hole not only provides adjustment space along its major axis but also allows for a certain degree of fine-tuning along its minor axis. This design allows the lower sleeve 3 to be flexibly adjusted in both forward / backward and left / right directions, ensuring that the ore always falls precisely into the center of the boom cap 4, adapting to adjustment needs under different working conditions.

[0046] Please refer to Figure 3 The ore lowering sleeve 3 includes a sleeve body 31 and an overlapping portion 32 extending outward along the outer periphery of the sleeve body 31.

[0047] Understandably, the overlapping part 32 extends outward along the outer periphery of the sleeve body 31, forming a stable support surface, so that the ore lowering sleeve 3 can be firmly overlapped on the through hole 21 of the bottom plate of the feed box 2. This structural design ensures that the ore lowering sleeve 3 will not loosen or fall off due to ore impact or vibration when suspended, thus improving the operational stability of the entire feeding device.

[0048] The material of the ore lowering sleeve 3 is ZGMn13 (high manganese steel). ZGMn13 high manganese steel is a typical wear-resistant steel with excellent impact resistance and wear resistance. Under high-stress impact conditions, high manganese steel can significantly improve its surface hardness through work hardening, thereby effectively resisting the impact wear of ore. This material is particularly suitable for use in mining equipment, capable of withstanding the high impact force when ore falls. Using ZGMn13 high manganese steel significantly extends the service life of the ore lowering sleeve 3. Compared to ordinary steel, the wear resistance life of high manganese steel can be increased by 3-5 times, reducing frequent replacements due to wear and lowering equipment maintenance costs. The 60mm wall thickness of the sleeve body 31 ensures that the sleeve can withstand greater impact forces without deformation or breakage during long-term use. The thick-walled structure not only improves the impact resistance of the sleeve but also extends its service life. Based on the high manganese steel material, the thick-walled structure can better disperse the impact force when ore falls, reducing local stress concentration, thereby further extending the service life of the sleeve. The high strength and toughness of high-manganese steel enable it to effectively resist the impact of falling ore and reduce sleeve deformation. The 60mm thick overlap 32 and sleeve body 31 further enhance the stability of the overall structure, ensuring that the equipment maintains good working condition during long-term operation.

[0049] Furthermore, the sleeve body 31 has a cylindrical structure.

[0050] It should be noted that the cylindrical sleeve body 31 ensures that the ore flows along the central axis during its descent, preventing ore deviation caused by the irregular shape of the sleeve. This allows the ore to fall evenly into the center of the boom cap 4, ensuring uniform feeding of the crusher and thus improving crushing efficiency and product quality. The cylindrical sleeve has a simple manufacturing process and low processing cost. Its symmetry makes it easier to control processing precision during production, reducing manufacturing errors caused by complex shapes. The cylindrical sleeve is easy to install, requiring no complex alignment. During installation, simply insert the sleeve into the through hole 21 in the bottom plate of the feed box 2, ensuring the overlap 32 fits tightly with the bottom plate, significantly shortening installation time.

[0051] In the above embodiment, the feed box 2 is a rectangular box.

[0052] Understandably, the rectangular box's regular geometric shape facilitates gripping and operation by lifting equipment. During installation, maintenance, or repositioning, the rectangular box can be easily lifted using lifting rings or lugs, eliminating the need for complex positioning devices and significantly improving lifting efficiency. The rectangular box design allows the feed box 2 to move flexibly on the supporting beam 1. Through simple translation, the feed box 2 can be adjusted forward, backward, left, and right on the beam, quickly correcting the outlet position of the ore lowering sleeve 3 and ensuring the ore falls precisely into the center of the boom cap 4. The feed box 2's top cover is bolted to the box body. This design not only ensures a secure connection but also greatly facilitates maintenance. When it's necessary to enter the box for maintenance or component replacement, simply loosening the bolts allows for easy opening of the top cover, eliminating the need for complex disassembly tools or procedures. This quick disassembly and installation design significantly shortens maintenance time, reduces maintenance costs, and improves equipment availability and operating efficiency.

[0053] Based on the above embodiment, the feed box 2 is provided with a material guiding structure, which is a conical structure, used to guide the material entering the feed box 2 to the through hole 21.

[0054] It should be noted that the conical guide structure efficiently guides the material entering the feed box 2 to the through hole 21 in the bottom plate, ensuring that the ore always flows along the predetermined path, avoiding material accumulation or deviation within the box, significantly improving material flow efficiency, and ensuring that the ore can enter the lower ore sleeve 3 quickly and evenly. Under the action of the conical guide structure, the material gradually converges to the through hole 21 in the bottom plate, avoiding flow obstruction caused by local accumulation, thereby improving the operational stability of the equipment. The conical guide structure ensures that the material is evenly distributed around the through hole 21, allowing the ore to fall precisely into the center of the lower ore sleeve 3. This uniform material distribution method helps to achieve "uniformly filled feeding" of the crusher, improving crushing efficiency and product quality, and reducing uneven crushing caused by off-center loading.

[0055] In the above embodiment, the material guiding structure includes a material guiding plate 5. One end of the material guiding plate 5 is connected to the inner wall of the feed box 2, and the other end extends towards the bottom plate and connects to the bottom plate. A material storage space is provided between the material guiding plate 5 and the edge of the through hole 21. The material storage space between the material guiding plate 5 and the edge of the through hole 21 of the bottom plate is used to temporarily store and buffer materials, ensuring that the materials can enter the lower sleeve 3 efficiently and uniformly.

[0056] Understandably, the inclined design of the guide plate 5 effectively guides the material to flow quickly towards the through hole 21 of the bottom plate, reducing the material's residence time in the feed box 2 and thus significantly improving the discharge speed. By optimizing the slope and shape of the guide plate 5, more material can converge at the through hole 21 of the bottom plate in a short time, increasing the discharge volume per unit time and improving the overall operating efficiency of the equipment. The storage space between the guide plate 5 and the edge of the through hole 21 acts as a buffer, reducing the direct impact of material on the bottom plate and the discharge sleeve 3, and extending the service life of the equipment. The storage space can temporarily store some material, ensuring a continuous and stable supply to the through hole 21 even in cases of uneven material supply, reducing the risk of equipment downtime due to material supply interruptions.

[0057] In some embodiments, an integral conical guide plate 5 is provided inside the feed box 2, with its top connected to the feed inlet 22 of the feed box 2 and its bottom extending to the through hole 21 of the bottom plate. The conical guide plate 5 is a square pyramid shape, made of wear-resistant steel (such as high manganese steel), and its surface can be hardened to improve wear resistance. The guide plate 5 is fixed to the inner wall of the feed box 2 by welding to ensure its firmness and stability. The conical guide plate 5 can evenly guide the material entering from the feed inlet 22 to the through hole 21 of the bottom plate, ensuring smooth material flow and reducing accumulation. The integral conical guide plate 5 has a simple design, low manufacturing and installation costs, and is easy to maintain.

[0058] In some embodiments, multiple independent guide plates 5 are provided in the feed box 2. These guide plates 5 are radially distributed around the through hole 21 and together guide the material to the through hole 21. Adjacent guide plates 5 are sealed together and are made of high-strength wear-resistant steel with a hardened surface.

[0059] In a preferred embodiment, the feed box 2 has a feed inlet 22 on one side and guide plates 5 on the inner walls of the other three sides.

[0060] It should be noted that guide plates 5 are installed on the inner walls of three sides of the feed box 2, which can guide the material to the through hole 21 of the bottom plate from multiple directions. This all-round material guiding design ensures that the material can be quickly and evenly distributed after entering the feed box 2, avoiding uneven distribution caused by material accumulation or deviation. Specifically, each guide plate 5 has a trapezoidal structure, and adjacent guide plates 5 are sealed together. No guide plate 5 is installed on the inner wall of the side near the feed inlet 22.

[0061] In the above case, a secondary ore outlet 23 is provided on the side of the bottom plate near the feed inlet 22, and the secondary ore outlet 23 is provided with a secondary sluice 6.

[0062] Understandably, the auxiliary chute 23 and auxiliary chute 6 effectively collect the small amount of fine material falling from the auxiliary chute of the feed conveyor belt, ensuring that this material smoothly enters the crushing chamber. This design avoids the accumulation or loss of fine material in the feed box 2, significantly improving material utilization and reducing waste. The auxiliary chute 6 provides an independent flow channel for fine material, preventing its accumulation in the feed box 2 and reducing the risk of blockage caused by material accumulation. This design ensures smooth material flow and improves the operational stability of the equipment. The auxiliary chute 6 evenly guides the collected fine material into the crushing chamber, further optimizing the material distribution.

[0063] In the above embodiment, the supporting beam 1 is an I-beam.

[0064] It should be noted that I-beams possess high strength and excellent bending resistance, effectively bearing the weight of the feed box 2 and its internal materials. This ensures the stability and reliability of the supporting beam 1 under high-load conditions, reducing deformation or damage caused by heavy loads. The cross-sectional shape of the I-beam gives it excellent bending and torsional resistance when subjected to vertical loads. This design effectively disperses stress, reduces local stress concentration, further improves the structural stability of the supporting beam 1, and extends its service life. While ensuring high strength, I-beams significantly reduce the equipment's weight compared to other solid steel materials. This not only reduces installation and transportation costs but also decreases the load-bearing requirements of the foundation structure, improving the overall flexibility of the equipment.

[0065] The ore is conveyed to the feeding device via the main and auxiliary feed conveyors. Then, through the feed sleeve 3 installed on the bottom plate of the feed box 2 inside the feeding device, the ore is precisely guided to the center of the boom cap 4. From here, the ore is evenly distributed into the crushing chamber, ensuring that the cone crusher operates smoothly in the efficient and stable "uniformly filled feeding" mode.

[0066] In summary, the feeding device for the cone crusher provided by this utility model, with its rapid and precise adjustment capability and simple and efficient installation method, provides a strong guarantee for the efficient operation of the cone crusher. It ensures that the ore enters the crushing chamber uniformly and stably, achieving the ideal "uniformly filled feeding" effect, thereby significantly improving crushing efficiency and product quality. At the same time, its optimized design greatly reduces the wear and replacement frequency of spare parts, effectively lowering equipment operating costs, ensuring long-term stable operation of the equipment, providing a reliable guarantee for mine production, and strongly supporting the achievement of production goals.

[0067] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0069] The feeding device for a cone crusher provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A feeding device for a cone crusher, characterized in that, include: Support beam (1); The feed box (2) is placed on the supporting beam (1); The ore lowering sleeve (3) is located in the feed box (2) and is used to guide the material in the feed box (2) to the center of the boom cap (4).

2. The feeding device for the cone crusher according to claim 1, characterized in that, The bottom plate of the feed box (2) has a through hole (21), and the ore lowering sleeve (3) passes through the through hole (21) and overlaps the bottom plate so that the ore lowering sleeve (3) is suspended in the feed box (2).

3. The feeding device for the cone crusher according to claim 2, characterized in that, The ore lowering sleeve (3) includes a sleeve body (31) and an overlapping portion (32) extending outward along the outer periphery of the sleeve body (31).

4. The feeding device for the cone crusher according to claim 3, characterized in that, The sleeve body (31) has a cylindrical structure.

5. The feeding device for a cone crusher according to any one of claims 2-4, characterized in that, The feed box (2) is a rectangular box.

6. The feeding device for the cone crusher according to claim 5, characterized in that, The feed box (2) is provided with a material guiding structure, which is a conical structure used to guide the material entering the feed box (2) to the through hole (21).

7. The feeding device for a cone crusher according to claim 6, characterized in that, The material guiding structure includes a material guiding plate (5), one end of which is connected to the inner wall of the feeding box (2), and the other end extends toward the bottom plate and is connected to the bottom plate. A material stacking space is provided between the material guiding plate (5) and the edge of the through hole (21).

8. The feeding device for the cone crusher according to claim 7, characterized in that, The feed box (2) has a feed inlet (22) on one side, and the inner walls of the other three sides are provided with the guide plate (5).

9. The feeding device for a cone crusher according to claim 8, characterized in that, The bottom plate is provided with a secondary ore outlet (23) on the side near the feed inlet (22), and the secondary ore outlet (23) is provided with a secondary sluice chute (6).

10. The feeding device for a cone crusher according to claim 1, characterized in that, The supporting beam (1) is an I-beam.

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