A double-disc inner floating disc of stainless steel with immersion liquid

Abstract

The present application belongs to the technical field of inner floating disc, and particularly relates to a liquid-immersed stainless steel brazing double-disc inner floating disc, which comprises a floating disc part, the floating disc part is arranged above the oil liquid surface to prevent the volatilization of the oil liquid; four groups of guide parts are arranged, the guide parts can prevent the floating disc part from overturning and ensure the smooth sliding of the floating disc part; the retrofit base is provided with a lower fixing disc which is fixed to the bottom of an oil drum. The control air pump inflates and pressurizes the inside of the split sliding shell through the air holes in the middle part of the middle hollow rod, inflates and expands the inflation gasket at the side of the split sliding shell, and the middle part starts to expand outward, which is equivalent to increasing the outer diameter of the split sliding shell until the outer surface of the inflation gasket is pressed against the inner wall of the oil drum. The inflation gasket can also be shrunk into the inside of the split sliding shell through the way of pressure reduction, so that the split sliding shell of the device can be adapted to different oil drums, and the problem of serious wear of the edge part of the floating disc is solved.

Description

Technical Field

[0001] This invention belongs to the field of internal floating disc technology, specifically a liquid-immersed stainless steel brazed double-disc internal floating disc. Background Technology

[0002] The self-floating assembled internal floating roof is a floating top cover that floats on the surface of the oil tank and rises and falls with the oil. Using this type of internal floating roof to cover the liquid surface is currently recognized as the most ideal, economical, and simple method to reduce oil evaporation loss. Statistics show that after six months, the economic value of the reduced oil and gas evaporation due to the internal floating roof structure is equivalent to the internal floating roof installation and purchase cost, meaning that the cost of the internal floating roof can be recovered within six months.

[0003] The following problems may occur during the use of existing internal floating roofs:

[0004] 1. As the internal floating roof slides inside the oil drum, a gap will inevitably be generated between it and the inner wall of the oil drum. Furthermore, the longer it is used, the more severe the wear on the edge of the floating roof will be, which will further reduce the actual oil blocking effect of the floating roof.

[0005] 2. If the internal floating roof is too tightly fitted to the inner wall of the oil drum, it will affect the sliding effect of the internal floating roof. In severe cases, it may cause the internal floating roof to get stuck on the inner wall of the oil drum and become unable to move.

[0006] 3. During use, the sensitivity of the internal float will decrease, making it unable to sensitively synchronize with changes in the oil level and adjust its actual position. Summary of the Invention

[0007] To address the problem that the internal floating roof cannot be adapted to the actual size of the oil drum, the technical solution adopted in this invention is: an immersion-type stainless steel brazed double-disc internal floating roof, including a floating roof component, which is positioned above the oil surface to prevent the oil from evaporating; and a guide component, which consists of four sets and can prevent the floating roof component from tipping over, ensuring that the floating roof component slides smoothly.

[0008] The modified base has a lower fixing plate, which is fixed to the bottom of the oil drum; a shaft connector is located at the shaft center on the upper surface of the modified base, and the top of the shaft connector is fixed inside the floating plate component; and four sets of rotating joints are used to restrict the sliding movement of the floating plate component.

[0009] Further, the floating roof component includes: a split sliding shell, the split sliding shell having a cutting groove in its middle and being disposed on the upper surface of the oil; four sets of anti-liquid gaskets, the outer surfaces of which are fixedly connected to the outer surface of the split sliding shell through through-holes; and an inflatable gasket, the outer surface of which is slidably connected to the inner wall of the split sliding shell, and the middle portion of the outer surface of the inflatable gasket extending to the outside of the split sliding shell through the cutting groove, the middle portion of the outer surface of the inflatable gasket pressing against the inner wall of the oil tank. The interior is filled with inert gas; there are two built-in clamps, the inner walls of which are pressed against the outer surface of the inflatable gasket, and the outer surface of the built-in clamps away from the inflatable gasket is slidably connected to the inner cavity of the split sliding shell through a slot; there is a spring inner cylinder, the two ends of which are fixedly connected to the outer surfaces of the upper and lower built-in clamps respectively, and the inner cavity of the spring inner cylinder has evenly spaced through-holes with ventilation function; and there is a floating chassis, which is located at the bottom of the split sliding shell and is located inside the oil.

[0010] Furthermore, the floating chassis includes: an inflatable ring tube, the upper surface of which is fixedly connected to the axial center of the lower surface of the split sliding shell via a fixing tube; four pressure-sensitive washers, the outer surface of which is fixedly connected to the bottom of the inner cavity of the split sliding shell; and spring washers, the top end of which is fixedly connected to the lower surface of the pressure-sensitive washers, and the bottom end of which is fixedly connected to the upper surface of the inflatable ring tube.

[0011] Furthermore, the rotating joint includes: a modified roller shaft, with a developing strip fixedly connected to the left side of the outer surface of the modified roller shaft, and the modified roller shaft can receive the extrusion pressure through the developing strip; an internal connecting plate, with storage shells slidably connected to both the upper and lower sides of the internal connecting plate via connecting springs, the top end of the storage shell away from the modified roller shaft being fixedly connected to the lower surface of the split shell, and the bottom end of the storage shell away from the modified roller shaft being fixedly connected to the upper surface of the lower fixed plate; a segmented push plate, the right end of the segmented push plate being fixedly connected to one end of the inner cavity of the modified roller shaft, and the left end of the segmented push plate being fixedly connected to a receiving connecting pipe; and a sliding rotating sleeve, the inner wall of which is rotatably connected to the end of the segmented push plate away from the modified roller shaft via the receiving connecting pipe, and the outer surface of the sliding rotating sleeve pressing against the inner wall of the oil drum.

[0012] Further, the guiding component includes: a central hollow rod, wherein a through-jet nozzle is uniformly provided in the middle of the inner cavity of the central hollow rod, and the through-jet nozzle extends to the outside of the central hollow rod; both ends of the central hollow rod extend to the outside of the split sliding shell through the through-jet nozzle; the upper and lower sides of the outer surface of the central hollow rod are fixedly connected to the inner wall of the anti-liquid gasket; a limiting top rod, the top of the limiting top rod is fixedly connected to the top of the inner wall of the oil drum, and the inner wall of the limiting top rod is slidably connected to the upper part of the outer surface of the central hollow rod; a bottom guide tube, the outer surface of the bottom guide tube is slidably connected to the lower part of the inner wall of the central hollow rod; and four control air pumps, the outer surface of the control air pumps is fixedly connected to the inner cavity of the lower fixed plate, and the bottom end of the bottom guide tube is fixedly connected to the output port at the top of the control air pumps.

[0013] Further, the axial connecting component includes: a compression cylinder, the bottom end of which is fixedly connected to the axial center of the upper surface of the lower fixed plate, and the top end of which is fixedly connected to the axial center of the bottom of the inner cavity of the split sliding shell; a filling plate, the outer surface of which is fixedly connected to the axial center of the inner wall of the split sliding shell, and the inner wall of which is fixedly connected to the top end of the compression cylinder; and a thrust inner cylinder, the outer surface of which is fixedly connected to the inner wall of the filling plate, a spring slide rod fixedly connected to the bottom end of the output shaft of the thrust inner cylinder, a filling concave plate fixedly connected to the bottom end of the spring slide rod, and the outer surface of the filling concave plate slidably connected to the bottom of the inner wall of the filling plate. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a cross-sectional view of the floating roof component of the present invention;

[0017] Figure 4 This is a schematic diagram of the modified base of the present invention;

[0018] Figure 5 This is a cross-sectional view of the rotating joint of the present invention;

[0019] Figure 6 This is a schematic diagram of the structure of the guiding component of the present invention;

[0020] Figure 7 This is a cross-sectional view of the floating chassis of the present invention;

[0021] Figure 8 This is a cross-sectional view of the axial connector of the present invention.

[0022] In the diagram: 1. Floating disc component; 11. Split sliding shell; 12. Liquid-proof gasket; 13. Internal clamping plate; 14. Spring inner cylinder; 15. Inflatable gasket; 5. Floating chassis; 51. Inflatable ring tube; 52. Fixing tube; 53. Spring washer; 54. Pressure-sensitive washer; 2. Modified base; 21. Lower fixing plate; 22. Rotating joint; 221. Modified roller; 222. Internal connecting plate; 223. Storage sliding shell; 224. Imaging strip; 225. Segmented push plate; 226. Sliding rotating sleeve; 4. Guide component; 41. Center hollow rod; 42. Limiting top rod; 43. Bottom guide tube; 44. Control air pump; 3. Shaft connector; 31. Compression long cylinder; 32. Filling plate; 33. Thrust inner cylinder; 34. Spring slide rod; 35. Filling concave plate. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

[0024] Example 1, please refer to Figures 1-6 The present invention provides a technical solution: an immersion stainless steel brazed double-disc internal floating disk, including a floating disk component 1, which is disposed above the oil surface to prevent the oil from evaporating; and a guide component 4, which consists of four sets and can prevent the floating disk component 1 from overturning and ensure that the floating disk component 1 slides smoothly.

[0025] The modified base 2 has a lower fixing plate 21, which is fixed to the bottom of the oil drum; a shaft connector 3, which is located at the shaft center on the upper surface of the modified base 2, and the top of the shaft connector 3 is fixed inside the floating plate component 1; and four sets of rotating joints 22, which are used to restrict the sliding movement of the floating plate component 1.

[0026] The floating roof component 1 includes: a split sliding shell 11, wherein a cutting groove is formed in the middle of the split sliding shell 11, and the split sliding shell 11 is disposed on the upper surface of the oil; four sets of anti-liquid gaskets 12, the outer surface of which is fixedly connected to the outer surface of the split sliding shell 11 through a through-hole; and an inflatable gasket 15, the outer surface of which is slidably connected to the inner wall of the split sliding shell 11, and the middle part of the outer surface of the inflatable gasket 15 extends to the outside of the split sliding shell 11 through the cutting groove. The middle part of the outer surface of the inflatable gasket 15 is pressed against the inner wall of the oil tank. The interior is filled with inert gas; there are two built-in clamping plates 13, the inner walls of which are pressed against the outer surface of the inflatable gasket 15, and the outer surface of the built-in clamping plates 13 away from the inflatable gasket 15 is slidably connected to the inner cavity of the split sliding shell 11 through a slot; there is a spring inner cylinder 14, the two ends of which are fixedly connected to the outer surfaces of the upper and lower built-in clamping plates 13 respectively, and the inner cavity of the spring inner cylinder 14 is evenly provided with ventilation openings; there is a floating chassis 5, which is set at the bottom of the split sliding shell 11 and is located inside the oil.

[0027] The rotating joint 22 includes a modified roller 221, to which a developing strip 224 is fixedly connected on the left side of the outer surface of the modified roller 221, and the modified roller 221 can feedback the pressure it receives through the developing strip 224; and an internal connecting plate 222, to which storage shells 223 are slidably connected on both the upper and lower sides via connecting springs. The top end of the storage shell 223 away from the modified roller 221 is fixedly connected to the lower surface of the split shell 11, and the bottom end of the storage shell 223... 23. The end of the modified roller shaft 221 away from the modified roller shaft 221 is fixedly connected to the upper surface of the lower fixed plate 21; the segmented push plate 225, the right end of the segmented push plate 225 is fixedly connected to one end of the inner cavity of the modified roller shaft 221, and the left end of the segmented push plate 225 is fixedly connected to a receiving pipe; the sliding rotating sleeve 226, the inner wall of the sliding rotating sleeve 226 is rotatably connected to the end of the segmented push plate 225 away from the modified roller shaft 221 through the receiving pipe, and the outer surface of the sliding rotating sleeve 226 is pressed against the inner wall of the oil drum.

[0028] The guiding component 4 includes: a central hollow rod 41, with through-jet ports evenly distributed in the middle of the inner cavity of the central hollow rod 41, extending to the outside of the central hollow rod 41; both ends of the central hollow rod 41 extending to the outside of the split sliding shell 11 through the through-jet ports; and the upper and lower sides of the outer surface of the central hollow rod 41 being fixedly connected to the inner wall of the anti-liquid gasket 12; a limiting top rod 42, the top of which is fixedly connected to the top of the inner wall of the oil drum, and the inner wall of which is slidably connected to the upper part of the outer surface of the central hollow rod 41; a bottom guide tube 43, the outer surface of which is slidably connected to the lower part of the inner wall of the central hollow rod 41; and four control air pumps 44, the outer surface of which is fixedly connected to the inner cavity of the lower fixed plate 21, and the bottom end of the bottom guide tube 43 being fixedly connected to the output port at the top of the control air pumps 44.

[0029] Before using the device, it needs to be installed inside the oil drum. The lower fixed plate 21 is fixed at the axis at the bottom of the oil drum. Since the outer diameter of the lower fixed plate 21 is the same as the diameter of the inner wall of the oil drum, and the actual outer diameter of the split sliding shell 11 is smaller than the actual outer diameter of the lower fixed plate 21, the lower fixed plate 21 is fixed at the bottom of the oil drum. The oil is filled with oil through the gap between the outer surface of the split sliding shell 11 and the oil drum, so that the oil level reaches the lower surface of the floating plate component 1.

[0030] The bottom guide tube 43, the middle hollow rod 41, and the limiting top rod 42 together form a connected three-section pipe body. The part of the middle hollow rod 41 with the through air hole is always located inside the split sliding shell 11. The anti-liquid gasket 12 prevents external oil from entering the interior of the split sliding shell 11. After the control air pump 44 pressurizes the interior of the split sliding shell 11 through the air hole in the middle hollow rod 41, the air-filled gasket 15 on the side of the split sliding shell 11 inflates and expands. The middle part begins to expand outward, effectively increasing the outer diameter of the split sliding shell 11 until the outer surface of the air-filled gasket 15 is pressed against the inner wall of the oil drum. At this time, the oil inside the oil drum is sealed by the device.

[0031] After the internal pressure of the split sliding shell 11 increases, the squeezing force between the built-in clamping plates 13 on the upper and lower sides and the inner wall of the split sliding shell 11 will further increase, thereby clamping and limiting the air gasket 15 to prevent the air gasket 15 from sliding out of the split sliding shell 11. The spring inner cylinder 14 is stretched, but the air pressure can still be used to inflate the air gasket 15 through the opening of the spring inner cylinder 14.

[0032] When oil is discharged from the bottom of the oil drum for use or when the amount of oil added is increased, the splitting sliding shell 11 needs to slide along the inner wall of the oil drum in sync with the change in oil level. At this time, under the traction of the shaft connector 3, the splitting sliding shell 11 slides up and down as a whole. Before the splitting sliding shell 11 slides, the control air pump 44 first depressurizes the inside of the splitting sliding shell 11, so that the air-filled gasket 15 retracts inside the splitting sliding shell 11, preventing the air-filled gasket 15 from sliding with the inside of the oil drum while being squeezed, which would cause wear on the device. When the splitting sliding shell 11 slides, the central hollow rod 41 can slide along the limiting top rod 42 and the bottom guide tube 43 to prevent the splitting sliding shell 11 from tipping over relative to the inner wall of the oil drum.

[0033] During the upward and downward sliding of the splitting slide shell 11, the lower surface of the splitting slide shell 11 will be pulled by the rotating plate composed of the built-in connecting plate 222 and the storage slide shell 223 to move the modified roller shaft 221 in the horizontal direction. During this process, the built-in connecting plate 222 will automatically retract into the interior of the storage slide shell 223 or slide out from the interior of the storage slide shell 223 according to the deflection angle, to prevent the combined rotating plate from being too long and jamming the splitting slide shell 11, thus preventing it from moving.

[0034] The segmented push plate 225 has an elastic component inside, which can push the sliding sleeve 226 towards the inner wall of the oil drum, so that the sliding sleeve 226 always fits against the inner wall of the oil drum. When the split sliding shell 11 is pressed down, the segmented push plate 225 is squeezed against the inner wall of the oil drum. At this time, the pressure on the modified roller shaft 221 increases. When the split sliding shell 11 is lifted up, the modified roller shaft 221 moves away from the inner wall of the oil drum, and the pressure on the modified roller shaft 221 decreases. According to the reading fed back by the display strip 224, the position of the split sliding shell 11 is adjusted to prevent the split sliding shell 11 from being pulled too far or too close to the lower fixed plate 21, which would cause damage to the shaft connecting part 3.

[0035] Example 2, please refer to Figures 1-8 The present invention provides a technical solution: Based on Embodiment 1, the floating chassis 5 includes an inflatable ring tube 51, the upper surface of which is fixedly connected to the axis of the lower surface of the split sliding shell 11 via a fixing tube 52; four pressure-sensitive washers 54, the outer surface of which is fixedly connected to the bottom of the inner cavity of the split sliding shell 11; and four spring washers 53, the top end of which is fixedly connected to the lower surface of the pressure-sensitive washers 54, and the bottom end of which is fixedly connected to the upper surface of the inflatable ring tube 51.

[0036] The axial connector 3 includes: a compression cylinder 31, the bottom end of which is fixedly connected to the axial center of the upper surface of the lower fixed plate 21, and the top end of which is fixedly connected to the axial center of the bottom of the inner cavity of the split sliding shell 11; a filling plate 32, the outer surface of which is fixedly connected to the axial center of the inner wall of the split sliding shell 11, and the inner wall of which is fixedly connected to the top end of the compression cylinder 31; and a thrust inner cylinder 33, the outer surface of which is fixedly connected to the inner wall of the filling plate 32, a spring slide rod 34 fixedly connected to the bottom end of the output shaft of the thrust inner cylinder 33, a filling concave plate 35 fixedly connected to the bottom end of the spring slide rod 34, and the outer surface of the filling concave plate 35 slidably connected to the bottom of the inner wall of the filling plate 32.

[0037] The split sliding shell 11 can determine the position of the oil level through the floating base 5 at the bottom. When the air ring tube 51 is immersed in the oil, the air ring tube 51 will rise relative to the oil due to the buoyancy of the oil. This will pull the fixed tube 52 and the spring washer 53 upward and push and squeeze the pressure-sensing washer 54. When the pressure-sensing washer 54 is triggered by the upward squeezing force, it means that the split sliding shell 11 has moved to the position of blocking the oil level. That is, the split sliding shell 11 has completed the synchronous movement of the oil level.

[0038] The thrust inner cylinder 33 connects to the interior of the compression cylinder 31 by pressurizing or depressurizing the filling concave plate 35, causing the compression cylinder 31 to be stretched or compressed, thereby pulling the top split sliding shell 11 to slide along the vertical direction.

[0039] Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art and related fields based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention, unless otherwise specified or limited, shall be implemented according to conventional means in the art.

Claims

1. A liquid-immersed stainless steel brazed double-disc internal floating disc, comprising, Floating disc component (1), which is positioned above the oil surface to prevent the oil from evaporating; The number of the guide components (4) is four, and the guide components (4) can prevent the floating disk component (1) from overturning and ensure that the floating disk component (1) slides smoothly. Its features are, include: Modified base (2), the modified base (2) has a lower fixing plate (21), and the lower fixing plate (21) is fixed to the bottom of the oil drum; A shaft connector (3) is provided at the shaft center on the upper surface of the modified base (2), and the top of the shaft connector (3) is fixed inside the floating plate component (1). Rotary joints (22), the number of which is four, and the rotational joints (22) are used to restrict the sliding movement of the floating disk component (1); The floating roof component (1) includes, The split sliding shell (11) has a cutting groove in the middle and is disposed on the upper surface of the oil. Liquid-proof gasket (12), the number of liquid-proof gaskets (12) is four sets, and the outer surface of the liquid-proof gasket (12) is fixedly connected to the outer surface of the split sliding shell (11) through the through hole; An inflatable gasket (15) is provided. The outer surface of the inflatable gasket (15) is slidably connected to the inner wall of the split sliding shell (11), and the middle part of the outer surface of the inflatable gasket (15) extends to the outside of the split sliding shell (11) through a cutting groove. The middle part of the outer surface of the inflatable gasket (15) is pressed against the inner wall of the oil drum. Built-in clamps (13), the number of built-in clamps (13) is two pieces, the inner wall of the built-in clamps (13) and the outer surface of the air gasket (15) are pressed against each other, and the side of the outer surface of the built-in clamps (13) away from the air gasket (15) is slidably connected to the inner cavity of the split sliding shell (11) through a slot. Spring inner cylinder (14), the two ends of the spring inner cylinder (14) are fixedly connected to the outer surfaces of the upper and lower built-in clamps (13) respectively, and the inner cavity of the spring inner cylinder (14) is uniformly opened with through-holes with ventilation function. The floating chassis (5) is located at the bottom of the split sliding shell (11) and inside the oil.

2. The immersion-type stainless steel brazed double-disc internal floating disk according to claim 1, characterized in that: The floating chassis (5) includes, An inflatable ring tube (51) is fixedly connected to the axis of the lower surface of the split sliding shell (11) via a fixing tube (52). Pressure-sensitive washer (54), the number of pressure-sensitive washer (54) is four, and the outer surface of the pressure-sensitive washer (54) is fixedly connected to the bottom of the inner cavity of the split sliding shell (11); A spring washer (53) is fixedly connected at its top end to the lower surface of a pressure-sensitive washer (54) and at its bottom end to the upper surface of an inflation ring tube (51).

3. The immersion-type stainless steel brazed double-disc internal floating disk according to claim 2, characterized in that: The rotating joint (22) includes, A modified roller (221) is fixedly connected to a developing strip (224) on the left side of its outer surface, and the modified roller (221) can receive feedback of the extrusion pressure through the developing strip (224); The built-in connecting plate (222) has a storage slide shell (223) slidably connected to both the upper and lower sides of the built-in connecting plate (222) by a connecting spring. The upper end of the storage slide shell (223) away from the modified roller shaft (221) is fixedly connected to the lower surface of the split slide shell (11), and the lower end of the storage slide shell (223) away from the modified roller shaft (221) is fixedly connected to the upper surface of the lower fixed plate (21). The segmented push plate (225) is fixedly connected to one end of the inner cavity of the modified roller shaft (221) at its right end, and a receiving pipe is fixedly connected to the left end of the segmented push plate (225). The inner wall of the sliding rotating sleeve (226) is rotatably connected to the end of the segmented push plate (225) away from the modified roller shaft (221) through the receiving connecting pipe, and the outer surface of the sliding rotating sleeve (226) is pressed against the inner wall of the oil drum.

4. The immersion-type stainless steel brazed double-disc internal floating disk according to claim 1, characterized in that: The guide component (4) includes, A hollow rod (41) with a through-jet nozzle evenly provided in the middle of its inner cavity, and the through-jet nozzle extending to the outside of the hollow rod (41). Both ends of the hollow rod (41) extend to the outside of the split sliding shell (11) through the through-jet nozzle. The upper and lower sides of the outer surface of the hollow rod (41) are fixedly connected to the inner wall of the anti-liquid gasket (12). The limiting top rod (42) is fixedly connected to the top of the inner wall of the oil drum, and the inner wall of the limiting top rod (42) is slidably connected to the upper part of the outer surface of the middle hollow rod (41). Bottom guide tube (43), the outer surface of which is slidably connected to the lower part of the inner wall of the middle hollow rod (41); The number of control air pumps (44) is four. The outer surface of the control air pump (44) is fixedly connected to the inner cavity of the lower fixed plate (21). The bottom end of the bottom guide tube (43) is fixedly connected to the output port at the top of the control air pump (44).

5. The immersion-type stainless steel brazed double-disc internal floating disk according to claim 1, characterized in that: The axial connector (3) includes, The compression cylinder (31) is fixedly connected at the bottom end to the axis of the upper surface of the lower fixed plate (21), and the top end of the compression cylinder (31) is fixedly connected to the axis of the bottom of the inner cavity of the split sliding shell (11). A filling plate (32) is fixedly connected to the axis of the inner wall of the split sliding shell (11) on its outer surface and the top of the compression cylinder (31) on its inner wall. The inner thrust cylinder (33) has its outer surface fixedly connected to the inner wall of the filling plate (32). A spring slide rod (34) is fixedly connected to the bottom end of the output shaft of the inner thrust cylinder (33). A filling concave plate (35) is fixedly connected to the bottom end of the spring slide rod (34). The outer surface of the filling concave plate (35) is slidably connected to the bottom of the inner wall of the filling plate (32).

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