Single gate feeding device for double roller mill

Abstract

The application discloses a single-gate discharging device of a pair of roller machines, which comprises a static feeding port above two rolling cylinders and a feeding cylinder butted on the upper end of the feeding port, a left discharging guide gate and a movable discharging guide gate are arranged in the feeding cylinder, the left discharging guide gate, the movable discharging guide gate and the front and back sidewalls of the feeding cylinder enclose a dynamic feeding port which is wide at the upper end and narrow at the lower end, the middle part of the movable discharging guide gate is hinged with the front and back walls of the feeding cylinder, one end of the movable discharging guide gate is connected with one end of a driving rod, the other end of the driving rod is connected with a driving rod translation structure which drives the driving rod to translate along the extension direction of the driving rod, and the driving rod translation structure is hinged with the feeding cylinder. The single-gate discharging device of the pair of roller machines can adjust the feeding speed, and solves the problem that the size of the feeding port of the existing sand making machine cannot be adjusted to meet the need of feeding speed adjustment.

Description

Technical Field

[0001] This invention relates to the field of roller sand making machine technology, and in particular to a single gate feeding device for a double roller sand making machine. Background Technology

[0002] Roller sand making machines typically include fixed rollers and movable rollers. Material is fed in from above the two rollers, continuously drawn into the space between them by the compression rollers, and discharged from the bottom of the machine at an ideal particle size. The relative movement of the two rollers crushes stones into sand. Chinese patent document CN202021220681X, authorized and announced on April 13, 2021, entitled "A Double Roller Sand Making Machine," includes a frame, a first pressing roller, a second pressing roller, and a drive motor. A pressing channel is formed between the first and second pressing rollers. The first pressing roller is rotatably connected to the frame, and the drive motor is connected to the frame to drive the first pressing roller to rotate. The frame has several support legs, each including a base plate, a lifting plate, a top plate, and a column arranged sequentially from bottom to top. The base plate has a positioning ring. A shortcoming of existing roller sand making machines is that the size of the feed inlet remains constant, thus preventing adjustment of the feed speed as needed. Summary of the Invention

[0003] The present invention aims to provide a single-gate feeding device for a double-roll mill with adjustable feeding speed, which solves the problem that the existing sand making machine cannot meet the need for feeding speed adjustment due to the fixed size of the feed inlet.

[0004] The above technical problems are solved by the following technical solution: A single gate feeding device for a roller mill, comprising a static feed inlet located above two rolling cylinders, characterized in that it further comprises a feed cylinder connected to the upper end of the feed inlet, wherein a left feeding guide gate and a moving feeding guide gate are provided inside the feed cylinder, the left feeding guide gate, the moving feeding guide gate and the front and rear side walls of the feed cylinder enclose a dynamic feed inlet that is wide at the top and narrow at the bottom, the middle part of the moving feeding guide gate is hinged to the front and rear walls of the feed cylinder, one end of the moving feeding guide gate is connected to one end of a drive rod, and the other end of the drive rod is connected to a drive rod translation structure that drives the drive rod to translate along the extension direction of the drive rod, the drive rod translation structure being hinged to the feed cylinder. In use, the guide gate is driven by a drive rod to swing around the central hinge point as needed, thereby changing the size of the dynamic feed inlet and thus altering the feeding speed. This prevents the roller mill from running dry without material and avoids blockages in the feed cylinder. Without material, the feed cylinder is easily damaged when material is fed again, and this also prevents jamming during feeding. Existing feed inlets are all of constant size, which cannot solve the above problems.

[0005] Preferably, the feed cylinder is equipped with a right fixed feed guide gate, which is located above the movable feed guide gate. The lower end of the movable feed guide gate is lower than the lower end of the right fixed feed guide gate, and the lower end of the movable feed guide gate extends to the left beyond the right fixed feed guide gate. This makes adjusting the movable feed guide gate easier.

[0006] Preferably, the upper surface of the right fixed-feed guide gate is provided with several right deceleration strips distributed in the vertical direction, and the right deceleration strips extend in the front-back direction. Similarly, the upper surface of the left feed guide gate is provided with several left deceleration strips distributed in the vertical direction, and the left deceleration strips extend in the front-back direction. This can slow down the feeding speed, reduce the impact on the roller mill's pressing cylinder, and extend the roller mill's lifespan. Current feeding methods prioritize smooth flow, neglecting the fact that smooth flow leads to faster feeding speeds, which in turn result in greater impact forces and damage to the equipment. They assume that since the pressing rollers are made of iron, this is irrelevant.

[0007] Preferably, the portion of the moving feed guide gate that forms the dynamic feed inlet is provided with a thickened plate. This can extend the service life of the moving feed guide gate.

[0008] Preferably, the system also includes two vertically distributed level gauges located within the feed hopper to detect the height of the stones inside. When the material in the feed hopper accumulates to a level detected by the upper level gauge, the dynamic feed inlet is enlarged to accelerate feeding. When the material accumulates to a level undetectable by the lower level gauge, the dynamic feed inlet is reduced to decrease feeding, but not decrease the overall feed rate. This ensures that the material level remains within the set range, preventing the material from directly impacting the guide gate upon entering the feed hopper.

[0009] Preferably, the front and rear ends of the middle section of the moving feed guide gate are each hinged to the front and rear walls of the feed cylinder via a first forward-backward hinge. The moving feed guide gate is connected to one end of the drive rod via a second forward-backward hinge, and the translational structure of the drive rod is hinged to the feed cylinder via a third forward-backward hinge. This design prevents the moving feed guide gate from wobbling during operation, thus improving the accuracy of feed control.

[0010] Preferably, the drive rod translation structure includes a gearbox connected to the drive rod for driving the translation and a drive motor for driving the gearbox. The gearbox is hinged to the feed mechanism, and the drive motor is fixed to the housing of the gearbox. This design is simple in structure and convenient in layout.

[0011] Preferably, the drive rod is connected to the upper end of the movable feeding guide gate. The drive rod can be designed with a long lever arm, thereby reducing the force required to open and close the movable feeding guide gate, allowing even a low-power motor to drive it.

[0012] Preferably, the system further includes a support plate located below the left feeding guide gate and fixed at its upper end to the feed cylinder, and a feed chute located at the upper end of the feed cylinder. The opening direction line of the feed chute intersects with the left feeding guide gate. The left feeding guide gate is disconnected from the feed cylinder but can move relative to it. The lower end of the support plate is fixed to the feed cylinder via an inclined support frame. A guide rod passing through the support plate is fixed to the lower surface of the left feeding guide gate. A shock-absorbing spring for driving the left feeding guide gate to reset is sleeved on the guide rod. Sound-insulating foam is provided between the support plate and the left feeding guide gate. When the left feeding guide gate is in a free state, the thickness of the sound-insulating foam is equal to the distance between the left feeding guide gate and the support plate. This design minimizes damage to the left feeding guide gate during feeding and reduces the amount of noise transmitted during feeding.

[0013] Preferably, the system also includes a water storage tank located outside the feed cylinder. A receiving cavity is formed between the left side wall of the feed cylinder, the support plate, and the inclined support frame. A press-type nozzle is installed within this cavity, and its inlet pipe leads into the water storage tank. The press-type nozzle is fixed to the guide rod. Two baffles distributed along the front-to-back direction are located at the upper end of the support plate, forming a water supply trough between the support plate and the two baffles. The nozzle of the press-type nozzle is located within this water supply trough. This allows for simultaneous water spraying onto the material entering the roller mill during feeding. The water is carried by the stone to the rollers, cooling them and preventing softening due to prolonged exposure to high pressure. Softening leads to wear and shortens the roller's lifespan. The water is also output through sound-absorbing sponge, enhancing its sound insulation effect.

[0014] The beneficial effect of this invention is that the size of the feed inlet can be adjusted, thereby changing the feeding speed by changing the size of the feed inlet. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present invention;

[0016] Figure 2 A diagram illustrating the removal of the feed cylinder and the feeding process;

[0017] Figure 3 This is a schematic diagram of Embodiment 2 of the present invention;

[0018] Figure 4 for Figure 3 A magnified view of a portion of point A.

[0019] In the diagram: 1. Compactor cylinder; 2. Static feed inlet; 3. Machine casing; 4. Feed cylinder; 5. Left feed guide gate; 6. Moving feed guide gate; 7. Dynamic feed inlet; 8. First front-to-back hinge shaft; 9. Second front-to-back hinge shaft; 10. Drive rod; 11. Drive rod translation structure; 12. Third front-to-back hinge shaft; 13. Gearbox; 14. Drive motor; 15. Right fixed feed guide gate; 16. Right deceleration bar; 17. Left deceleration bar; 18. Thickened plate; 19. Material level gauge; 20. Support plate; 21. Feed trough; 22. Inclined support frame; 23. Guide rod; 24. Shock-absorbing spring; 25. Sound insulation sponge; 26. Water storage tank; 27. Receiving cavity; 28. Press-type nozzle; 33. Water inlet pipe of press-type nozzle; 29. ​​Water baffle; 30. Water supply trough; 31. Nozzle of press-type nozzle; 32. Obstruction inclined plate. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, see Figure 1 and Figure 2A single-gate feeding device for a roller mill includes a static feed inlet 2 located above two grinding cylinders 1. The grinding cylinders are located inside a housing 3. The static feed inlet is located at the upper end of the housing. It also includes a feed cylinder 4 connected to the upper end of the feed inlet. The feed cylinder contains a left-feeding guide gate 5 and a moving feed guide gate 6. The left-feeding guide gate, the moving feed guide gate, and the front and rear side walls of the feed cylinder form a dynamic feed inlet 7 that is wider at the top and narrower at the bottom. The front and rear ends of the middle section of the moving feed guide gate are each hinged to the front and rear walls of the feed cylinder via a first front-rear hinge shaft 8. The upper end of the moving feed guide gate is connected to one end of a drive rod 10 via a second front-rear hinge shaft 9. The other end of the drive rod is connected to a drive rod translation structure 11 that drives the drive rod to translate along its extension direction. The drive rod translation structure is hinged to the feed cylinder via a third front-rear hinge shaft 12. The drive rod translation structure includes a gearbox 13 connected to the drive rod for driving the translation and a drive motor 14 driving the gearbox. The gearbox is hinged to the feed cylinder via a third hinge shaft running forward and backward. The drive motor is fixed to the housing of the gearbox. A right fixed-discharge guide gate 15 is provided inside the feed cylinder. The right fixed-discharge guide gate is located above the moving discharge guide gate, with the lower end of the moving discharge guide gate lower than the lower end of the right fixed-discharge guide gate, and the lower end of the moving discharge guide gate extending to the left beyond the right fixed-discharge guide gate. The upper surface of the right fixed-discharge guide gate has several right deceleration bars 16 distributed in the vertical direction, extending in the forward and backward direction. The upper surface of the left discharge guide gate has several left deceleration bars 17 distributed in the vertical direction, extending in the forward and backward direction. A thickened plate 18 is provided at the part of the moving discharge guide gate that forms the dynamic feed inlet. Two level gauges 19, distributed in the vertical direction, are installed inside the feed cylinder to detect the height to which the stones have filled. When the material in the feed hopper accumulates to a level detected by the upper level gauge, the dynamic feed inlet widens to accelerate feeding. When the material in the feed hopper accumulates to a level undetectable by the lower level gauge, the dynamic feed inlet narrows to lower the feed level, but does not reduce the feed rate. This ensures that the material level remains within the set range, preventing the material from directly impacting the guide gate when entering the feed hopper.

[0022] In use, the guide gate is driven by a drive rod to swing around the central hinge point as needed, thereby changing the size of the dynamic feed inlet and thus altering the feeding speed. This prevents the roller mill from running dry without material and avoids blockages in the feed cylinder. Without material, the feed cylinder is easily damaged when material is fed again, and this also prevents jamming during feeding. Existing feed inlets are all of constant size, which cannot solve the above problems.

[0023] Example 2 differs from Example 1 in that:

[0024] See Figure 3 and Figure 4It also includes a support plate 20 located below the left lower guide gate and fixed together with the upper end of the feed cylinder, and a feed trough 21 located at the upper end of the feed cylinder. The opening direction line of the feed trough intersects with the left lower guide gate. The left lower guide gate is disconnected from the feed cylinder and can move relative to it. The feed cylinder is fixedly and sealed with a blocking inclined plate 32 that blocks the gap between the upper end of the left lower guide gate and the feed cylinder. The lower end of the support plate is fixed together with the feed cylinder by an inclined support frame 22. A guide rod 23 is fixedly connected to the lower surface of the left lower guide gate and passes through the support plate. A shock-absorbing spring 24 is sleeved on the guide rod to drive the left lower guide gate to reset. A sound-insulating sponge 25 is provided between the support plate and the left lower guide gate. When the left lower guide gate is in a free state, the thickness of the sound-insulating sponge is equal to the distance between the left lower guide gate and the support plate. It also includes a water storage tank 26 located outside the feed cylinder. A receiving cavity 27 is formed between the left side wall of the feed cylinder, the support plate, and the inclined support frame. A press-type nozzle 28 is installed in the receiving cavity. The water inlet pipe 33 of the press-type nozzle enters the water storage tank. The press-type nozzle is fixed together with the guide rod. Two baffle plates 29 distributed in the front-back direction are provided at the upper end of the support plate. A water supply trough 30 is formed between the support plate and the two baffle plates. The nozzle 31 of the press-type nozzle is located in the water supply trough. This allows water to be sprayed onto the material entering the roller mill simultaneously during feeding. The water is carried by the stone to the roller, which cools the roller and prevents it from softening due to long-term use. Softening leads to wear and shortens the service life of the roller.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0026] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A single gate roll mill machine outfeed device comprising a static feed inlet located above two roll cylinders, characterized in that, The feeding cylinder is arranged on the upper end of the feeding port, and the left discharging guide flap and the movable discharging guide flap are arranged in the feeding cylinder.

2. The pair of roll machine single gate gate blanking device according to claim 1, characterized in that, The right fixed discharging guide flap is arranged in the feeding cylinder, the right fixed discharging guide flap is arranged above the movable discharging guide flap, the lower end of the movable discharging guide flap is lower than the lower end of the right fixed discharging guide flap, and the lower end of the movable discharging guide flap protrudes to the left beyond the right fixed discharging guide flap.

3. The pair of roll machine single gate gate blanking device according to claim 2, characterized in that, The upper surface of the right fixed discharging guide flap is provided with a plurality of right deceleration strips distributed in the up-down direction, the right deceleration strips extend in the front-rear direction, the upper surface of the left discharging guide flap is provided with a plurality of left deceleration strips distributed in the up-down direction, and the left deceleration strips extend in the front-rear direction.

4. The pair of roll machine single gate unloading device according to claim 1 or 2 or 3, characterized in that, The part, at which the movable discharging guide flap constitutes the dynamic feeding port, is provided with a thickened plate.

5. The pair of roll machine single gate door discharging device according to claim 1 or 2 or 3, characterized in that, Two level meters for detecting the height of stones filled in the feeding cylinder are arranged in the feeding cylinder and distributed in the up-down direction.

6. The pair of roll machine single gate door discharging device according to claim 1 or 2 or 3, characterized in that, The front-rear ends of the middle part of the movable discharging guide flap are respectively connected to the front-rear walls of the feeding cylinder through front-rear first hinge shafts, the movable discharging guide flap is connected to one end of the driving rod through a front-rear second hinge shaft, and the driving rod translation structure is connected to the feeding cylinder through a front-rear third hinge shaft.

7. The pair of roll machine single gate door discharging device according to claim 1 or 2 or 3, characterized in that, The driving rod translation structure comprises a gear box for driving the driving rod to translate and a driving motor for driving the gear box, which are connected together with the driving rod, the gear box is hinged with the feeding cylinder, and the driving motor is fixed with the shell of the gear box.

8. The pair of roll machine single gate door discharging device according to claim 1 or 2 or 3, characterized in that, The driving rod is connected to the upper end of the movable blanking guide gate.

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