A mill access door

Abstract

The application discloses a maintenance door for a mineral grinding machine and relates to the field of mineral grinding machines, which comprises a mineral grinding machine pipeline and a reinforcing plate welded on the outer wall of the mineral grinding machine pipeline, the inside of the reinforcing plate is provided with a maintenance door, the outer wall of the maintenance door is fixedly connected with two U-shaped fixed plates, and the grooves of the two U-shaped fixed plates are both rotatably connected with supporting rods. The outer wall of the maintenance door is fixedly connected with two U-shaped fixed plates, the inner walls of the two U-shaped fixed plates are both rotatably connected with first supporting rods through fixing rods, one end of the two first supporting rods is rotatably connected with a second supporting rod through a bolt, and the two second supporting rods are fixedly connected with a cross rod. Maintenance personnel can move to the cross rod by treading the maintenance door, move to the bottom of the mineral grinding machine cylinder through the cross rod, and thus the maintenance of the mineral grinding machine cylinder by the maintenance personnel is facilitated. After the maintenance, the maintenance personnel can also move out through the cross rod, and thus the maintenance process of the maintenance personnel is reduced.

Description

Technical Field

[0001] This invention relates to the field of mining mills, and in particular to a maintenance door for mining mills. Background Technology

[0002] A ore mill is a mining device used to grind ore. Raw materials are fed into a hollow cylinder (with end caps at both ends) through a hollow shaft for grinding. The cylinder contains grinding media of various diameters (steel balls, steel rods, or gravel, etc.). Its advantages include ease of operation and convenient slurry flow and distribution. After prolonged use, the internal piping of the ore mill requires inspection and maintenance.

[0003] The applicant found through a search that a Chinese patent discloses "a pressure pipe with an inspection door", with the publication number "CN1174045A". This patent mainly uses a drive shaft to drive the drive gear to rotate through a rotating handle. The locking rod on the rack slides between the guide protrusion and the guide plate. The locking rod enters the locking hole and the fixing groove to lock the sealing plate, thereby improving the stability of the sealing plate in the pipe, improving the sealing and stability. In conjunction with the bolts on the flange ring, it further improves the installation stability and strength.

[0004] Although the device in the aforementioned patent can lock the sealing disc and improve installation stability and strength, in reality, pressure pipelines come in various sizes. When it is a large pressure pipeline, after the maintenance personnel enter through the door, there is no foothold, making it difficult for them to move to the bottom of the inner wall of the pipeline. Furthermore, after the maintenance is completed, it is not easy for them to move out through the maintenance port of the discharge pipeline, which increases the difficulty of the maintenance process for maintenance personnel. Summary of the Invention

[0005] The purpose of this invention is to provide an inspection door for a mining mill, in order to solve the problem mentioned in the background art that, in the actual situation where pressure pipelines have different sizes, when it is a large pressure pipeline, after opening the inspection door, the personnel have no foothold, making it difficult for them to move to the bottom of the inner wall of the pipeline, and after the inspection is completed, it is difficult for them to move out of the pipeline inspection port, which increases the difficulty of the maintenance process for the maintenance personnel.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a maintenance door for a mining mill, comprising a mining mill pipeline and a reinforcing plate welded to the outer wall of the mining mill pipeline. The reinforcing plate contains a maintenance door. Two U-shaped fixing plates are fixedly connected to the outer wall of the maintenance door. Support rods are rotatably connected to the grooves of both U-shaped fixing plates. First support rods are rotatably connected to the walls of both support rods. Second support rods are provided at the ends of both first support rods away from the U-shaped fixing plates. Two crossbars are fixedly connected to the opposite sides of the two second support rods. Fixing elements for controlling the angle between the first and second support rods are provided on the outer walls of both second support rods. Two sets of fixing plates are fixedly connected to the top surface of the maintenance door. Bolts are inserted into the opposite sides of each set of fixing plates. Openings adapted to the bolts are provided on the outer walls of both first support rods.

[0007] Preferably, one end of each of the two second support rods is inserted with a bolt three, and the second support rod is rotatably connected to the first support rod through the bolt three.

[0008] Preferably, each of the two second support rods has a groove at one end, the width of which is greater than the width of the first support rod. The outer wall of the first support rod has a second opening, and the outer wall of the second support rod has a third opening of the same size as the second opening. The top surface of the inspection door is fixedly connected to two sets of fixing plates, and each set of fixing plates is connected to a detachable bolt. The size of the bolt is adapted to the size of the second opening. The outer wall of the second support rod has a fourth opening adapted to the first opening. The width of the second support rod is greater than the width of the U-shaped fixing plate.

[0009] Preferably, the fixing member includes a U-shaped insert plate, which is inserted into the outer wall of the second support rod. One end of the U-shaped insert plate extends through the outer wall of the groove into the inner side of the groove. The upper wall of the U-shaped insert plate in the groove is close to the bottom edge of the first support rod. A screw is rotatably connected to the outer wall of the second support rod, and the screw is threadedly connected to the second support rod.

[0010] Preferably, a connecting plate is fixedly connected to one end of the inspection door, and a rotating rod is fixedly connected to the end of the connecting plate away from the inspection door. The rod wall of the rotating rod is provided with a drive box for driving the rotating rod to rotate.

[0011] Preferably, the drive box includes a drive box housing, a worm gear is rotatably connected inside the drive box housing, a worm wheel is fixedly connected to the rod wall of the worm gear, the worm wheel meshes with the worm gear, and a drive device is fixedly connected to one end of the worm gear.

[0012] Preferably, the driving device includes a driving rod, one end of which passes through the wall of the drive housing and is fixedly connected to one end of the worm gear, and a turntable is fixedly connected to the end of the driving rod away from the worm gear.

[0013] Preferably, two symmetrical sliding grooves are formed on the lower part of the inner wall of the reinforcing plate, and sliders are slidably connected inside the two sliding grooves. The two sliders are rotatably connected to one end of the rotating rod. A slot is formed on the lower part of the inner wall of the reinforcing plate, and the width of the slot is adapted to the width of the connecting plate. An opening larger than the area of ​​the inspection door is formed on the outer wall of the mill pipe. The size of the opening is smaller than the inner cavity size of the reinforcing plate, and the size of the inspection door is smaller than the inner cavity size of the reinforcing plate. A sealing rubber plate for sealing is fixedly connected to the bottom edge of the inspection door.

[0014] Preferably, the outer wall of the reinforcing plate is provided with a detachable fastener, the fastener including a fastening rod, and the outer wall of both crossbars is provided with a set of threaded openings. Two sets of fastening bolts are inserted into the outer wall of the fastening rod, and one end of the fastening bolt is threadedly connected to the corresponding threaded opening.

[0015] The technical effects and advantages of this invention are as follows:

[0016] 1. This invention features two U-shaped fixing plates fixedly connected to the outer wall of the maintenance door. The inner walls of the two U-shaped fixing plates are rotatably connected to a first support rod via a fixing rod. One end of each of the two first support rods is rotatably connected to a second support rod via bolts. A crossbar is fixedly connected between the two second support rods. Maintenance personnel can move to the crossbar by stepping on the maintenance door, and then move to the bottom of the mill cylinder via the crossbar, facilitating maintenance of the mill cylinder. After maintenance, the personnel can move back out via the crossbar, reducing the maintenance process for maintenance personnel.

[0017] 2. The present invention sets up two sets of fixing plates, and each set of fixing plates is provided with a bolt. One end of the bolt is inserted into the fixing plate to fix the first support rod. Then, the angle between the first support rod and the second support rod is fixed by a limiting device to prevent the second support rod from shaking and causing danger when people step on the crossbar.

[0018] 3. After the maintenance is completed, the second and third openings are fixed on the second fixing plate, and then the fourth opening is fixed on the second fixing plate. The two second support rods are fixed on the surface of the maintenance door. Then, one end of the fastening bolt on the fastening rod is inserted into the threaded hole for fixing. By tightening the fastening bolt, the sealing plate at the bottom of the maintenance door can be tightly attached to the reinforcing plate, thereby enhancing the sealing performance of the maintenance door. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the inspection door of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the maintenance door when it is closed according to the present invention.

[0021] Figure 3 for Figure 1 Enlarged structural diagram at point A.

[0022] Figure 4 This is a schematic diagram of the pipeline section of the mining mill according to the present invention.

[0023] Figure 5 for Figure 2 Schematic diagram of the side view cross-section structure.

[0024] Figure 6 This is a schematic diagram of the left-side cross-sectional structure of the drive box of the present invention.

[0025] In the diagram: 1. Inspection door; 2. U-shaped fixing plate; 21. Support rod; 3. First support rod; 31. Through-hole two; 32. Through-hole one; 4. Bolt three; 5. Second support rod; 51. Through-hole three; 52. Through-hole four; 53. Crossbar; 531. Threaded opening; 54. Groove; 6. Fixing plate one; 61. Bolt one; 7. Fixing component; 71. U-shaped insert plate; 72. Screw; 8. Fixing plate two; 81. Bolt two; 9. Connecting plate; 10. Rotating rod; 101. Worm gear; 11. Drive box; 111. Drive rod; 112. Turntable; 113. Drive box housing; 114. Worm; 12. Sealing rubber plate; 13. Mining mill pipeline; 131. Opening; 14. Reinforcing plate; 141. Slide groove; 142. Groove opening; 15. Fastening rod; 151. Fastening bolt; 16. Sliding block. Detailed Implementation

[0026] 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.

[0027] This invention provides, for example Figure 1-6The inspection door for a mining mill shown includes a reinforcing plate 14 welded to the outer wall of the mining mill pipeline 13. An inspection door 1 is provided inside the reinforcing plate 14. Two U-shaped fixing plates 2 are fixedly connected to the outer wall of the inspection door 1. Support rods 21 are rotatably connected to the inner side of each of the two U-shaped fixing plates 2. First support rods 3 are rotatably connected to the walls of each of the two support rods 21. Second support rods 5 are rotatably connected to the ends of each of the two first support rods 3 away from the U-shaped fixing plates 2. Two crossbars 53 are fixedly connected to the opposite sides of the two second support rods 5. Fixing members 7 for controlling the angle between the first support rods 3 and the second support rods 5 are provided on the outer wall of each of the two second support rods 5. Two sets of fixing plates 6 are fixedly connected to the top surface of the inspection door 1. Bolts 61 are inserted into the opposite sides of each set of fixing plates 6. Through openings 32 adapted to bolts 61 are opened on the outer wall of each of the two first support rods 3. Bolts 4 are inserted into one end of each of the two second support rods 5. The second support rods 5 are rotatably connected to the first support rods 3 through bolts 34.

[0028] The position of the first support rod 3 can be fixed by inserting bolt 61 into the through-hole 32 to prevent the first support rod 3 from shaking and flipping. Then, the angle between the first support rod 3 and the second support rod 5 can be fixed by the fastener 7 to prevent the second support rod 5 from shaking when a person steps on the crossbar 53, thereby preventing the person from falling when moving down.

[0029] like Figure 1 As shown, each of the two second support rods 5 has a groove 54 at one end. The width of the groove 54 is greater than the width of the first support rod 3. The outer wall of the first support rod 3 has a through-hole 31. The outer wall of the second support rod 5 has a through-hole 31 of the same size as the through-hole 31. The top surface of the inspection door 1 is fixedly connected to two sets of fixing plates 2 8. Each set of fixing plates 2 8 is connected to a detachable bolt 2 81. The size of the bolt 2 81 is adapted to the size of the through-hole 31. The outer wall of the second support rod 5 has a through-hole 4 52 adapted to the through-hole 1 32. The width of the second support rod 5 is greater than the width of the U-shaped fixing plate 2.

[0030] By creating a groove 54 at the end of the second support rod 5, and the groove 54 being wider than the U-shaped fixing plate 2, when the first support rod 3 is flipped, the first support rod 3 and the U-shaped fixing plate 2 can be retracted into the groove 54. Then, they are inserted into the through opening 31 and through opening 51 by bolt 2 81, and through opening 4 52 is fixed to the fixing plate 6 by bolt 1 61, which makes it convenient to store the first support rod 3 and the second support rod 5 after maintenance.

[0031] like Figure 1 As shown, a connecting plate 9 is fixedly connected to one end of the inspection door 1, and a rotating rod 10 is fixedly connected to the other end of the connecting plate 9 away from the inspection door 1. The rod wall of the rotating rod 10 is provided with a drive box 11 for driving the rotating rod 10 to rotate.

[0032] like Figure 2As shown, the outer wall of the reinforcing plate 14 is provided with detachable fasteners, including fastening rods 15. The outer walls of the two crossbars 53 are each provided with a set of threaded openings 531. Two sets of fastening bolts 151 are inserted into the outer wall of the fastening rods 15, and one end of the fastening bolts 151 is threadedly connected to the corresponding threaded openings 531.

[0033] Tightening the fastening bolt 151 can move the threaded port 531, which in turn moves the crossbar 53, which in turn moves the inspection door 1, thus making the inspection door 1 fit tightly against the reinforcing plate 14 and increasing the sealing of the mill pipeline 13.

[0034] like Figure 3 As shown, the fastener 7 includes a U-shaped insert plate 71, which is inserted into the outer wall of the second support rod 5. One end of the U-shaped insert plate 71 extends through the outer wall of the groove 54 and into the inner side of the groove 54. The upper wall of the U-shaped insert plate 71 in the groove 54 is close to the bottom edge of the first support rod 3. The outer wall of the second support rod 5 is rotatably connected to a screw 72, and the rod wall of the screw 72 is threadedly connected to the second support rod 5.

[0035] By turning the screw 72, the U-shaped insert plate 71 is moved. When the door is opened, the U-shaped insert plate 71 moves to the bottom of the first support rod 3 and limits the first support rod 3, so that the angle between the first support rod 3 and the second support rod 5 is fixed, preventing the second support rod 5 from shaking when maintenance personnel step on the crossbar 53.

[0036] like Figure 1 and Figure 6 As shown, the drive box 11 includes a drive box housing 113. A worm gear 114 is rotatably connected inside the drive box housing 113. A worm wheel 101 is fixedly connected to the rod wall of the rotating rod 10. The worm wheel 101 meshes with the worm gear 114. A drive device is fixedly connected to one end of the worm gear 114. The drive device includes a drive rod 111. One end of the drive rod 111 passes through the housing wall of the drive box housing 113 and is fixedly connected to one end of the worm gear 114. A turntable 112 is fixedly connected to the end of the drive rod 111 away from the worm gear 114.

[0037] The turntable 112 drives the drive rod 111 to rotate, which in turn drives the worm gear 114 to rotate, which in turn drives the worm wheel 101 to rotate, which in turn drives the rotating rod 10 to rotate, which in turn drives the connecting plate 9 to rotate, which in turn drives the inspection door 1 to flip, thereby opening and closing the inspection door 1.

[0038] like Figure 1 and Figure 5As shown, two symmetrical grooves 141 are opened on the lower part of the inner wall of the reinforcing plate 14. Slider 16 is slidably connected inside the two grooves 141. The two sliders 16 are rotatably connected to one end of the rotating rod 10. A slot 142 is opened on the lower part of the inner wall of the reinforcing plate 14. The width of the slot 142 is adapted to the width of the connecting plate 9. An opening 131 larger than the side length of the inspection door 1 is opened on the outer wall of the mill pipe 13. The size of the opening 131 is smaller than the inner cavity size of the reinforcing plate 14. The size of the inspection door 1 is smaller than the inner cavity size of the reinforcing plate 14. A sealing rubber plate 12 adapted to the opening 131 is fixedly connected to the bottom edge of the inspection door 1.

[0039] By making the size of the inspection door 1 smaller than the size of the inner cavity of the reinforcing plate 14, the inspection door 1 is prevented from flipping out, which would reduce the sealing of the mill pipeline 13. The drive rod 111 is moved by pushing the turntable 112, which in turn moves the drive box 11, which in turn moves the rotating rod 10, which in turn moves the slider 16 in the slide groove 141, thereby moving the inspection door 1. When opening, the slider 16 is pushed to one side of the slide groove 141, so that the inspection door 1 is closer to the opening 131, thereby allowing the inspection door 1 to flip at a larger angle, making it easier for maintenance personnel to enter and exit.

[0040] Working principle of the invention: In use, firstly, remove the fastening bolt 151 and the fastening rod 15, then push the turntable 112 to make the drive rod 111 drive the drive box 11 to move. The drive box 11 drives the rotating rod 10 to move. The rotating rod 10 drives the slider 16 to move inside the slide groove 141, so that the slider 16 moves to one end of the slide groove 141. Then, by rotating the turntable 112, the drive rod 111 is rotated. The drive rod 111 drives the worm gear 114 to rotate. The worm gear 114 drives the worm wheel 101 to rotate. The worm wheel 101 drives the rotating rod 10 to rotate. The rotating rod 10 drives the connecting plate 9 to rotate. The rotation of the connecting plate 9 causes the inspection door 1 to flip.

[0041] After flipping the inspection door 1 to a certain angle, take out bolt 2 81 and bolt 1 61, flip the two first support rods 3 and the second support rod 5 until the second support rod 5 is placed at the top of the inspection door 1. Then fix the first support rod 3 and the second support rod 5. First, insert bolt 1 61 through the fixing plate 1 6 into the through hole 2 31, and then tighten it. Then turn screw 72. The rotation of screw 72 will drive the U-shaped insert plate 71 to move until the U-shaped insert plate 71 is inserted into the groove 54, so that the U-shaped insert plate 71 is close to the bottom end of the first support rod 3. Then fix the angle between the second support rod 5 and the first support rod 3. After the angle is fixed, turn the turntable 112 to rotate the inspection door 1 to a flat angle. Then the maintenance personnel can move the inspection door 1 to the crossbar 53 by stepping on it, and then move the bottom of the grinding mill cylinder down for maintenance.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A maintenance door for a mining mill, comprising a reinforcing plate (14) welded to the outer wall of the mining mill pipeline (13), characterized in that: The inside of the reinforcing plate (14) is provided with an inspection door (1). The outer wall of the inspection door (1) is fixedly connected with two U-shaped fixing plates (2). The inner side of each of the two U-shaped fixing plates (2) is rotatably connected with a support rod (21). The rod wall of each of the two support rods (21) is rotatably connected with a first support rod (3). The end of each of the two first support rods (3) away from the U-shaped fixing plate (2) is rotatably connected with a second support rod (5). The opposite side of each of the two second support rods (5) is fixedly connected with two crossbars (53). The outer wall of each of the two second support rods (5) is provided with a fixing member (7) for controlling the angle between the first support rod (3) and the second support rod (5). The top surface of the inspection door (1) is fixedly connected with two sets of fixing plates (6). The opposite side of each set of fixing plates (6) is inserted with a bolt (61). The outer wall of each of the two first support rods (3) is provided with a through-hole (32) that matches the bolt (61). One end of each of the two second support rods (5) is provided with a groove (54), the width of the groove (54) is greater than the width of the first support rod (3), the outer wall of the first support rod (3) is provided with a second opening (31), the outer wall of the second support rod (5) is provided with a third opening (51) of the same size as the second opening (31), the top surface of the inspection door (1) is fixedly connected with two sets of fixing plates (8), each set of fixing plates (8) is connected with a detachable bolt (81), the size of the bolt (81) is adapted to the size of the second opening (31), the outer wall of the second support rod (5) is provided with a fourth opening (52) adapted to the first opening (32), and the width of the second support rod (5) is greater than the width of the U-shaped fixing plate (2).

2. The maintenance door for a mining mill according to claim 1, characterized in that: Each of the two second support rods (5) has a bolt three (4) inserted into one end, and the second support rod (5) is rotatably connected to the first support rod (3) through the bolt three (4).

3. The maintenance door for a mining mill according to claim 1, characterized in that: The fastener (7) includes a U-shaped insert (71), which is inserted into the outer wall of the second support rod (5). One end of the U-shaped insert (71) extends through the outer wall of the groove (54) into the inner side of the groove (54). The upper wall of the part of the U-shaped insert (71) in the groove (54) is close to the bottom edge of the first support rod (3). The outer wall of the second support rod (5) is rotatably connected to a screw (72), and the rod wall of the screw (72) is threadedly connected to the second support rod (5).

4. The maintenance door for a mining mill according to claim 1, characterized in that: One end of the inspection door (1) is fixedly connected to a connecting plate (9), and the end of the connecting plate (9) away from the inspection door (1) is fixedly connected to a rotating rod (10). The rod wall of the rotating rod (10) is provided with a drive box (11) for driving the rotating rod (10) to rotate.

5. The maintenance door for a mining mill according to claim 4, characterized in that: The drive box (11) includes a drive box housing (113), a worm gear (114) is rotatably connected inside the drive box housing (113), a worm wheel (101) is fixedly connected to the rod wall of the rotating rod (10), the worm wheel (101) meshes with the worm gear (114), and a drive device is fixedly connected to one end of the worm gear (114).

6. The maintenance door for a mining mill according to claim 5, characterized in that: The driving device includes a driving rod (111), one end of which passes through the wall of the drive housing (113) and is fixedly connected to one end of the worm gear (114). A turntable (112) is fixedly connected to the end of the driving rod (111) away from the worm gear (114).

7. The maintenance door for a mining mill according to claim 1, characterized in that: Two symmetrical grooves (141) are provided on the lower part of the inner wall of the reinforcing plate (14). Slider (16) is slidably connected inside the two grooves (141). The two sliders (16) are rotatably connected to one end of the rotating rod (10). A slot (142) is provided on the lower part of the inner wall of the reinforcing plate (14). The width of the slot (142) is adapted to the width of the connecting plate (9). An opening (131) larger than the side length of the inspection door (1) is provided on the outer wall of the mill pipe (13). The size of the opening (131) is smaller than the inner cavity size of the reinforcing plate (14). The size of the inspection door (1) is smaller than the inner cavity size of the reinforcing plate (14). A sealing rubber plate (12) adapted to the opening (131) is fixedly connected to the bottom edge of the inspection door (1).

8. The maintenance door for a mining mill according to claim 1, characterized in that: The outer wall of the reinforcing plate (14) is provided with detachable fasteners, the fasteners include fastening rods (15), the outer walls of the two crossbars (53) are provided with a set of threaded openings (531), the outer walls of the fastening rods (15) are inserted with two sets of fastening bolts (151), one end of the fastening bolts (151) is threadedly connected to the corresponding threaded openings (531).

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