Single-gate four-rod blanking structure of double-roller machine

Abstract

The double-roller machine single-gate four-rod discharging structure comprises a rack and a feeding cylinder which is arranged on the rack and located above two rolling cylinders, a left movable discharging guide gate plate hinged to the rack and a right lower discharging guide gate plate fixedly connected to the rack are arranged in the feeding cylinder, and the left movable discharging guide gate plate and the right lower discharging guide gate plate are hinged to the rack. The left movable discharging guide gate plate is hinged to one end of a left first connecting rod, the other end of the left first connecting rod is hinged to one end of a left second connecting rod and one end of a left telescopic rod, and the other end of the left second connecting rod and the other end of the left telescopic rod are hinged to the rack. One end of the movable discharging guide flashboard, one end of the left first connecting rod, one end of the left second connecting rod and the rack are connected into a four-connecting-rod structure, and a dynamic feeding port is formed between the left movable discharging guide flashboard and the right lower discharging guide flashboard. The sand making machine has the advantage that the feeding speed can be adjusted, and the problem that the size of a feeding port of an existing sand making machine is not changed, and the requirement for adjusting the feeding speed cannot be met is solved.

Description

Technical Field

[0001] The invention relates to the technical field of roller sand making machines, in particular to a single-gate four-rod material discharge structure of a roller machine. Background Art

[0002] A roller sand making machine usually includes a fixed roller and a movable roller. The material is fed from above the two rollers, and is continuously brought between the rollers by the squeezing roller, and discharged from the bottom of the machine with an ideal particle size. The stone is crushed into sand by the relative movement of the two rollers. In the Chinese patent literature, patent number CN202021220681X was authorized and announced on April 13, 2021. The application includes a vertical frame, a first rolling roller, a second rolling roller and a drive motor. A rolling channel is formed between the first rolling roller and the second rolling roller. The first rolling roller is rotatably connected to the frame, and the drive motor is connected to the frame. The drive motor is used to drive the first rolling roller to rotate. The frame is provided with a number of supporting feet, and the supporting feet include a bottom plate, a lifting plate, a top plate and a column arranged in sequence from bottom to top, and a positioning ring is provided on the bottom plate. The shortcoming of the roller sand making machine in the prior art is that the size of the feed port remains unchanged, so that the feed speed cannot be adjusted as needed. Summary of the invention

[0003] The present invention aims to provide a single-gate four-rod feeding structure of a double-roller machine with adjustable feeding speed, which solves the problem that the feeding port size of the existing sand making machine is unchanged and cannot meet the need of feeding speed adjustment.

[0004] The above technical problems are solved by the following technical solutions: a single-gate four-bar unloading structure of a double-roller machine, comprising a frame and a feed cylinder arranged on the frame above two rolling cylinders, wherein a left movable unloading guide gate plate hinged to the frame and a right lower unloading guide gate plate fixed to the frame are arranged in the feed cylinder, the left movable unloading guide gate plate is hinged to one end of the left first connecting rod, the other end of the left first connecting rod is hinged to one end of the left second connecting rod and one end of the left telescopic rod, the other end of the left second connecting rod and the other end of the left telescopic rod are both hinged to the frame, the movable unloading guide gate plate, the left first connecting rod, one end of the left second connecting rod and the frame are connected to form a four-bar structure, and a dynamic feed port is formed between the left movable unloading guide gate plate and the right lower unloading guide gate plate. When in use, the left telescopic rod drives the left material unloading guide gate to swing, so that the dynamic feed port changes its opening and closing size, and the unloading speed is controlled to avoid the roller machine running idle without material and the feed barrel being blocked and out of material. If there is no material, the feed barrel is easily damaged when the material is fed again, and the jamming of the feed can also be avoided. The existing feeds are all of fixed size and cannot solve the above problems.

[0005] Preferably, a right loading and unloading guide gate and a left loading and unloading guide gate are provided in the feeding barrel, the right loading and unloading guide gate is located above the right loading and unloading guide gate, the lower end of the right loading and unloading guide gate is lower than the lower end of the right loading and unloading guide gate, the lower end of the right loading and unloading guide gate exceeds the right loading and unloading guide gate to the left, the left loading and unloading guide gate is located above the left movable loading and unloading guide gate, the lower end of the left movable loading and unloading guide gate is lower than the lower end of the left movable loading and unloading guide gate, the lower end of the left movable loading and unloading guide gate exceeds the left movable loading and unloading guide gate to the right, and a static feeding port is formed between the right loading and unloading guide gate and the left loading and unloading guide gate, so that it can save effort when driving the left movable loading and unloading guide gate to swing.

[0006] As preferred, it also includes a left support plate whose upper end is fixed to the feed barrel and located below the left feed guide gate plate, and a right support plate whose upper end is fixed to the feed barrel and located below the right feed guide gate plate. The left feed guide gate plate and the feed barrel can move relative to each other. A left guide rod which is penetrated by the left support plate is fixed to the lower surface of the left feed guide gate plate. A left shock-absorbing spring which drives the left feed guide gate plate to reset is sleeved on the left guide rod. A left sound-proof sponge is arranged between the left support plate and the left feed guide gate plate. The left feed guide gate plate is in a In the free state, the left sound insulation sponge is connected with the left material guide gate and the left support plate; the right material guide gate and the feeding tube can move relatively, the lower surface of the right material guide gate is fixed with a right guide rod penetrating the right support plate, the right guide rod is sleeved with a right damping spring for driving the right material guide gate to reset, a right sound insulation sponge is arranged between the right support plate and the right material guide gate, and the right sound insulation sponge is connected with the right material guide gate and the right support plate when the right material guide gate is in the free state. It can reduce the damage to the left and right material guide gates during feeding and reduce the noise during feeding.

[0007] Preferably, it also includes a water tank, a left push-type nozzle and a right push-type nozzle, the water inlet pipe of the left push-type nozzle extends into the water tank, the left push-type nozzle is fixed together with the left guide rod, the upper end of the left support plate is provided with two left water baffles distributed along the front-to-back direction, the left support plate and the two left water baffles form a left water supply trough, and the nozzle of the left push-type nozzle is located in the left water supply trough; the water inlet pipe of the right push-type nozzle extends into the water tank, the right push-type nozzle is fixed together with the right guide rod, the upper end of the right support plate is provided with two right water baffles distributed along the front-to-back direction, the right support plate and the two right water baffles form a right water supply trough, and the nozzle of the right push-type nozzle is located in the right water supply trough. It can spray water on the material stones entering the roller mill at the same time when feeding. The water is brought to the roller by the stones to cool the roller, avoiding the roller from softening due to long-term action. Softening is easy to wear and shorten the service life. The water is output through the sound insulation sponge, which can improve the sound insulation effect of the sound insulation sponge.

[0008] Preferably, the frame is hinged with the left movable material unloading guide gate through the left first front-to-back hinge shaft, the left movable material unloading guide gate is hinged with the left first connecting rod through the left second front-to-back hinge shaft, the left first connecting rod is hinged with the left second connecting rod and the left telescopic rod through the left third front-to-back hinge shaft, the left second connecting rod is hinged with the frame through the left fourth front-to-back hinge shaft, and the left telescopic rod is hinged with the frame through the left fifth front-to-back hinge shaft. The movable material unloading guide gate is not easy to shake when swinging, which can improve the accuracy of controlling unloading.

[0009] Preferably, the left telescopic rod is an electric cylinder, an oil cylinder or a pneumatic cylinder.

[0010] Preferably, the hinge point between the left first connecting rod and the left movable material unloading guide gate is located above the hinge point between the left movable material unloading guide gate and the frame. The lever arm driven by the left telescopic rod can be designed to be long, thereby reducing the force driving the left movable material unloading guide gate.

[0011] Preferably, the frame is provided with a left longitudinal beam, the right side of the left longitudinal beam is provided with a right connecting ear of the left longitudinal beam, the left side is provided with a left connecting ear of the left longitudinal beam, the left movable material unloading guide gate is hinged on the right connecting ear of the left longitudinal beam, and the left second connecting rod is hinged on the left connecting ear of the left longitudinal beam; the frame is provided with a right longitudinal beam, the left side of the right longitudinal beam is provided with a left connecting ear of the right longitudinal beam, the lower end of the right lower material unloading guide gate is connected to the left connecting ear of the right longitudinal beam, and the upper end of the right lower material unloading guide gate is supported on the upper surface of the right longitudinal beam through a supporting column. This can avoid damage to the parts where the left movable material unloading guide gate and the right lower material unloading guide gate are connected to the frame.

[0012] Preferably, the left second connecting rod is a bent rod structure bent toward the left longitudinal beam, so as to avoid interference between the longitudinal beam and the left second connecting rod in a compact structure.

[0013] Preferably, the left longitudinal beam comprises a left longitudinal flat tube, a left upper longitudinal strip fixed on the upper surface of the left longitudinal flat tube, and a left lower longitudinal strip fixed on the lower surface of the left longitudinal flat tube, and the left connecting ear of the left longitudinal rod is connected to the left longitudinal flat tube, the left upper longitudinal strip, and the left lower longitudinal strip at the same time; the right longitudinal beam comprises a right longitudinal flat tube, a right upper longitudinal strip fixed on the upper surface of the right longitudinal flat tube, and a right lower longitudinal strip fixed on the lower surface of the right longitudinal flat tube, and the left connecting ear of the right longitudinal rod is connected to the right longitudinal flat tube, the right upper longitudinal strip, and the right lower longitudinal strip at the same time. The connecting ear can play a role in strengthening the strength of the longitudinal beam, and can improve the strength of the longitudinal beam while reducing the weight.

[0014] The beneficial effect of the present invention is that the size of the feed opening can be adjusted, so that the feed speed can be changed by changing the size of the feed opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention; Figure 2 It is a partial schematic diagram of the present invention; Figure 3 It is a partial schematic diagram of the second embodiment of the present invention.

[0016] In the figure: frame 1, rolling cylinder 2, feeding cylinder 3, left longitudinal beam 4, right connecting ear of left longitudinal beam 5, left connecting ear of left longitudinal beam 6, left longitudinal flat tube 7, upper left longitudinal strip 8, lower left longitudinal strip 9, right longitudinal beam 10, left connecting ear of right longitudinal beam 11, right longitudinal flat tube 12, upper right longitudinal strip 13, lower right longitudinal strip 14, left first front-to-back hinge shaft 15, left dynamic unloading guide gate 16, left second front-to-back hinge shaft 17, left first connecting rod 18, left third front-to-back hinge shaft 19, left second connecting rod 20, left telescopic rod 21, left fourth front-to-back hinge shaft 22, left fifth front-to-back hinge shaft 23, lower right unloading guide gate 24, supporting column 25, dynamic feed Feed port 26, right feed guide gate 27, left feed guide gate 28, static feed port 29, left support plate 30, right support plate 31, left baffle plate slant plate 32, left guide rod 33, left shock absorbing spring 34, left sound insulation sponge 35, water storage tank 36, left push-type sprinkler 37, right push-type sprinkler 38, water inlet pipe 39 of left push-type sprinkler, left water baffle 40, left water supply trough 41, nozzle 42 of left push-type sprinkler, right baffle plate slant plate 43, right guide rod 44, right shock absorbing spring 45, right sound insulation sponge 46, water inlet pipe 47 of right push-type sprinkler, right water baffle 48, right water supply trough 49, nozzle 50 of right push-type sprinkler. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1, see Figure 1 and Figure 2A single gate four-rod unloading structure for a roller mill includes a frame 1 and a feeding cylinder 3 arranged on the frame and located above two rolling cylinders 2. The frame is provided with a left longitudinal beam 4, and a right connecting ear 5 of a left longitudinal beam portion is provided on the right side of the left longitudinal beam, and a left connecting ear 6 of a left longitudinal beam portion is provided on the left side. The left longitudinal beam includes a left longitudinal flat tube 7, a left upper longitudinal strip 8 fixed on the upper surface of the left longitudinal flat tube, and a left lower longitudinal strip 9 fixed on the lower surface of the left longitudinal flat tube. The left connecting ear of the left longitudinal rod portion is simultaneously connected to the left longitudinal flat tube, the left upper longitudinal strip, and the left lower longitudinal strip. The frame is provided with a right longitudinal beam 10, and a left connecting ear 11 of a right longitudinal beam portion is provided on the left side of the right longitudinal beam. The right longitudinal beam includes a right longitudinal flat tube 12, a right upper longitudinal strip 13 fixed on the upper surface of the right longitudinal flat tube, and a right lower longitudinal strip 14 fixed on the lower surface of the right longitudinal flat tube, and the left connecting ear of the right longitudinal rod portion is simultaneously connected to the right longitudinal flat tube, the right upper longitudinal strip, and the right lower longitudinal strip. A left movable material unloading guide gate 16 is provided in the feeding barrel, which is hinged to the right connecting ear of the left longitudinal beam through the left first front-to-back hinge shaft 15. The left movable material unloading guide gate is hinged to one end of the left first connecting rod 18 through the left second front-to-back hinge shaft 17, and the other end of the left first connecting rod is hinged to one end of the left second connecting rod 20 and one end of the left telescopic rod 21 through the left third front-to-back hinge shaft 19, and the other end of the left second connecting rod is hinged to the left connecting ear of the left longitudinal beam through the left fourth front-to-back hinge shaft 22. The other end of the left telescopic rod is hinged to the frame through the left fifth front-to-back hinge shaft 23. The movable material unloading guide gate, the left first connecting rod, one end of the left second connecting rod and the frame are connected to form a four-bar structure. A right lower material unloading guide gate 24 is provided in the unloading barrel, and the lower end is fixed to the left connecting ear of the right longitudinal beam. The upper end of the right lower material unloading guide gate is supported on the upper surface of the right longitudinal beam through a support column 25. A dynamic feed port is formed between the left movable material discharge guide gate and the right lower material discharge guide gate. The left telescopic rod is an electric cylinder, an oil cylinder or an air cylinder. The hinge point between the left first connecting rod and the left movable material discharge guide gate is located above the hinge point between the left movable material discharge guide gate and the frame. The upper end of the right lower material discharge guide gate is supported on the upper surface of the right longitudinal beam through a supporting column. The left second connecting rod is a curved rod structure bent toward the left longitudinal beam. A dynamic feed port 26 is formed between the left movable material discharge guide gate and the right lower material discharge guide gate. A right material loading and unloading guide gate 27 and a left material unloading guide gate 28 are arranged in the feeding cylinder. The right material loading and unloading guide gate is located above the right material unloading guide gate, the lower end of the right material unloading guide gate is lower than the lower end of the right material loading and unloading guide gate, and the lower end of the right material unloading guide gate is beyond the right material loading and unloading guide gate to the left. The left material unloading guide gate is located above the left movable material unloading guide gate, the lower end of the left movable material unloading guide gate is lower than the lower end of the left material unloading guide gate, and the lower end of the left movable material unloading guide gate is beyond the left material unloading guide gate to the right. A static feeding port 29 is formed between the right material loading and unloading guide gate and the left material unloading guide gate.

[0019] When in use, the left telescopic rod drives the left movable material discharge guide gate to swing to achieve the change of the size of the dynamic feed opening and adjust the material discharge speed.

[0020] Embodiment 2 is different from Embodiment 1 in that: See also Figure 3 , and also includes a left support plate 30 whose upper end is fixed with the feed barrel and located below the left feed guide gate, and a right support plate 31 whose upper end is fixed with the feed barrel and located below the right feed guide gate. The left feed guide gate and the feed barrel can move relative to each other, and the feed barrel is fixedly and sealedly connected with a left baffle inclined plate 32 that blocks the gap between the upper end of the left feed guide gate and the feed barrel. A left guide rod 33 that penetrates the left support plate is fixedly connected to the lower surface of the left feed guide gate, and a left shock-absorbing spring 34 that drives the left feed guide gate to reset is sleeved on the left guide rod. A left sound insulation sponge 35 is arranged between the left support plate and the left feed guide gate. When the left feed guide gate is in a free state, the left sound insulation sponge is connected to both the left feed guide gate and the left support plate. It also includes a water tank 36, a left push-type nozzle 37 and a right push-type nozzle 38. The water inlet pipe 39 of the left push-type nozzle extends into the water tank. The left push-type nozzle is fixed together with the left guide rod. The upper end of the left support plate is provided with two left water baffles 40 distributed in the front-back direction. The left support plate and the two left water baffles form a left water supply trough 41. The nozzle 42 of the left push-type nozzle is located in the left water supply trough. The right loading and unloading guide gate plate and the feed barrel can move relative to each other. The feed barrel is fixedly and sealedly connected with a right baffle inclined plate 43 that blocks the gap between the upper end of the right loading and unloading guide gate plate and the feed barrel. The lower surface of the right loading and unloading guide gate plate is fixedly connected with a right guide rod 44 that penetrates the right support plate. The right guide rod is sleeved with a right damping spring 45 that drives the right loading and unloading guide gate plate to reset. A right sound insulation sponge 46 is provided between the right support plate and the right loading and unloading guide gate plate. When the right loading and unloading guide gate is in a free state, the right sound insulation sponge is connected to the right loading and unloading guide gate and the right support plate. The water inlet pipe 47 of the right push-type nozzle extends into the water tank, the right push-type nozzle is fixed together with the right guide rod, and the upper end of the right support plate is provided with two right water baffles 48 distributed in the front-to-back direction. The right support plate and the two right water baffles form a right water supply trough 49, and the nozzle 50 of the right push-type nozzle is located in the right water supply trough.

[0021] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single gate four-rod unloading structure for a roller mill, comprising a frame and a feeding cylinder arranged on the frame and located above two rolling cylinders, characterized in that: The feed barrel is provided with a left movable material discharge guide gate plate hinged to the frame and a right lower material discharge guide gate plate fixed to the frame. The left movable material discharge guide gate plate is hinged to one end of the left first connecting rod, the other end of the left first connecting rod is hinged to one end of the left second connecting rod and one end of the left telescopic rod, the other end of the left second connecting rod and the other end of the left telescopic rod are hinged to the frame, the movable material discharge guide gate plate, the left first connecting rod, one end of the left second connecting rod and the frame are connected to form a four-bar structure, and a dynamic feed port is formed between the left movable material discharge guide gate plate and the right lower material discharge guide gate plate.

2. The single gate four-rod unloading structure of the roller mill according to claim 1 is characterized in that: A right upper and lower material guide gate and a left lower material guide gate are provided in the feed barrel, the right upper and lower material guide gate is located above the right lower material guide gate, the lower end of the right lower material guide gate is lower than the lower end of the right upper and lower material guide gate, and the lower end of the right lower material guide gate exceeds the right upper and lower material guide gate to the left, the left lower material guide gate is located above the left movable material guide gate, the lower end of the left movable material guide gate is lower than the lower end of the left lower material guide gate, and the lower end of the left movable material guide gate exceeds the left lower material guide gate to the right, and a static feed port is formed between the right upper and lower material guide gate and the left lower material guide gate.

3. The single gate four-rod material unloading structure of the roller mill according to claim 2 is characterized in that: The left material guide gate is fixed to the feeding cylinder at its upper end and is located below the left material lowering guide gate, and the right material lowering guide gate is fixed to the feeding cylinder at its upper end and is located below the right material lowering guide gate. The left material lowering guide gate and the feeding cylinder can move relative to each other. A left guide rod which is passed through the left support plate is fixed to the lower surface of the left material lowering guide gate. A left damping spring which drives the left material lowering guide gate to reset is sleeved on the left guide rod. A left sound insulation sponge is arranged between the left support plate and the left material lowering guide gate. The left material lowering guide gate is in a free state. When in the free state, the left sound insulation sponge is connected with the left material loading guide gate and the left supporting plate; the right material loading guide gate and the feeding barrel can move relative to each other, the lower surface of the right material loading guide gate is fixedly connected with a right guide rod penetrated by the right supporting plate, the right guide rod is provided with a right shock-absorbing spring for driving the right material loading guide gate to reset, a right sound insulation sponge is arranged between the right supporting plate and the right material loading guide gate, and the right sound insulation sponge is connected with the right material loading guide gate and the right supporting plate when the right material loading guide gate is in the free state.

4. The single gate four-rod unloading structure of the roller mill according to claim 3 is characterized in that: It also includes a water tank, a left push-type nozzle and a right push-type nozzle, the water inlet pipe of the left push-type nozzle extends into the water tank, the left push-type nozzle is fixed together with the left guide rod, the upper end of the left support plate is provided with two left water baffles distributed along the front-to-back direction, the left support plate and the two left water baffles form a left water supply trough, and the nozzle of the left push-type nozzle is located in the left water supply trough; the water inlet pipe of the right push-type nozzle extends into the water tank, the right push-type nozzle is fixed together with the right guide rod, the upper end of the right support plate is provided with two right water baffles distributed along the front-to-back direction, the right support plate and the two right water baffles form a right water supply trough, and the nozzle of the right push-type nozzle is located in the right water supply trough.

5. The single gate four-rod unloading structure of the roller mill according to claim 1, 2, 3 or 4, characterized in that: The frame is hinged to the left movable material unloading guide gate through the left first front-to-back hinge shaft, the left movable material unloading guide gate is hinged to the left first connecting rod through the left second front-to-back hinge shaft, the left first connecting rod is hinged to the left second connecting rod and the left telescopic rod through the left third front-to-back hinge shaft, the left second connecting rod is hinged to the frame through the left fourth front-to-back hinge shaft, and the left telescopic rod is hinged to the frame through the left fifth front-to-back hinge shaft.

6. The single gate four-rod unloading structure of the roller mill according to claim 1, 2, 3 or 4, characterized in that: The left telescopic rod is an electric cylinder, an oil cylinder or a gas cylinder.

7. The single gate four-rod material unloading structure of the roller mill according to claim 1, 2, 3 or 4, characterized in that: The hinge point between the left first connecting rod and the left movable material unloading guide gate is located above the hinge point between the left movable material unloading guide gate and the frame.

8. The single gate four-rod unloading structure of the roller mill according to claim 1, 2, 3 or 4, characterized in that: The frame is provided with a left longitudinal beam, a right connecting ear of the left longitudinal beam is provided on the right side of the left longitudinal beam, and a left connecting ear of the left longitudinal beam is provided on the left side, the left movable unloading guide gate is hinged on the right connecting ear of the left longitudinal beam, and the left second connecting rod is hinged on the left connecting ear of the left longitudinal beam; the frame is provided with a right longitudinal beam, a left connecting ear of the right longitudinal beam is provided on the left side of the right longitudinal beam, the lower end of the right lower unloading guide gate is connected to the left connecting ear of the right longitudinal beam, and the upper end of the right lower unloading guide gate is supported on the upper surface of the right longitudinal beam through a supporting column.

9. The single gate four-rod material unloading structure of the roller mill according to claim 8 is characterized in that: The left second connecting rod is a bent rod structure bent toward the left longitudinal beam.

10. The single gate four-rod material unloading structure of the roller mill according to claim 8, characterized in that: The left longitudinal beam includes a left longitudinal flat tube, an upper left longitudinal strip fixed on the upper surface of the left longitudinal flat tube, and a lower left longitudinal strip fixed on the lower surface of the left longitudinal flat tube, and the left connecting ear of the left longitudinal rod portion is simultaneously connected to the left longitudinal flat tube, the upper left longitudinal strip, and the lower left longitudinal strip; the right longitudinal beam includes a right longitudinal flat tube, an upper right longitudinal strip fixed on the upper surface of the right longitudinal flat tube, and a lower right longitudinal strip fixed on the lower surface of the right longitudinal flat tube, and the left connecting ear of the right longitudinal rod portion is simultaneously connected to the right longitudinal flat tube, the upper right longitudinal strip, and the lower right longitudinal strip.

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