A grain bin manhole system

Abstract

The application discloses a granary manhole system and relates to the technical field of grain storage engineering. Specifically comprising a platform panel arranged at the upper portion of a granary, a through opening arranged at the side of the platform panel, a ladder one arranged in the through opening and extending downward, a ladder two arranged on the side wall of the granary above the platform panel and extending upward to a manhole cover, a grating plate arranged below the manhole cover, an opening arranged on the grating plate and corresponding to the position of the ladder two, and an inner sealing layer arranged below the grating plate. A sampler is arranged on the platform panel. The system has the functions of explosion relief, rescue and sampling, is high in safety, and can greatly improve the operation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grain storage engineering, in particular to a grain bin manhole system. BACKGROUND

[0002] Grain storage is related to the national economy and people's livelihood, so ensuring the safety of grain storage and reducing grain storage loss is the primary task of grain storage work. At present, many large warehouses and supporting facilities for grain storage have been established in China, and a scientific grain storage system has also been gradually formed. However, since the grain storage process is a dynamic process, it is easily affected by external environment, such as ventilation, light, temperature, humidity, oxygen content, etc. If not timely discovered and handled, it can easily lead to grain mildew, heating, condensation and other loss accidents, so it is necessary to regularly enter the warehouse to inspect the grain in the warehouse. In addition, the grain bin has good sealing performance, and a large amount of dust will be generated during the process of entering and exiting the grain, which can easily cause dust explosion, so explosion relief is also crucial to the safety of grain storage.

[0003] The grain storage warehouse type in China mainly includes shallow round silos, vertical silos and large flat warehouses, all of which belong to large grain storage types, and the amount of grain in the warehouse is large and the grain layer is thick. The top of the shallow round silo and the vertical silo is designed with a manhole, and the operating personnel generally enter the warehouse through the manhole. In addition, the current warehouse type rarely sets a unified safety operation platform, and a few enterprises set a temporary operation platform at the manhole position. In addition, the natural ventilation in the grain bin is poor, and the dust is large, which can easily cause the accumulation of toxic, harmful, flammable and explosive substances. In order to ensure the safety of the personnel entering the warehouse, it is crucial to establish a unified manhole system with operation platform, sampling, escape and explosion relief for the safety of grain storage. SUMMARY

[0004] Therefore, the present application aims at the deficiencies of the prior art, and provides a grain bin manhole system, which has explosion relief, rescue and sampling functions, is high in safety, and can greatly improve the operation efficiency and the safety and stability of storage.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A grain bin manhole system, comprising a platform panel arranged at the upper part of the grain bin, a through opening is arranged at the side edge of the platform panel, a ladder one extending downward is arranged in the through opening, a ladder two extending upward is arranged on the side wall of the grain bin above the platform panel, the ladder two extends upward to a manhole cover, a grating plate is arranged below the manhole cover, and an inner sealing layer is arranged below the grating plate; a sampler is arranged on the platform panel.

[0007] Further, a telescopic arm is arranged on the sampler in a matched mode, a soft tube is connected to the sampling inlet of the sampler, a stainless steel tube is arranged at the bottom of the telescopic arm, and the upper end of the stainless steel tube is communicated with the soft tube.

[0008] Further, the platform panel is located above the grain loading line.

[0009] Further, a stainless steel platform railing is arranged around the platform panel.

[0010] Further, a safety cage is arranged on one side of the ladder.

[0011] Further, an observation hole is arranged in the center of the manhole cover plate, and a handle is arranged on the side edge of the manhole cover plate, the manhole cover plate is a sandwich color steel plate, and the bottom end surface of the manhole cover plate is connected to the warehouse wall through a traction cable.

[0012] Further, the manhole cover plate is connected to the warehouse wall through a mounting piece one and a mounting piece two, the mounting piece one is fixed to the upper end surface of the manhole cover plate and extends to the side surface of the manhole cover plate, and the mounting piece two is a ladder type structure, the bottom is fixedly connected to the warehouse wall through an explosion-proof bolt, and the upper part extends to the side surface of the manhole cover plate and is fixedly connected to the mounting piece one.

[0013] Further, the sealing layer comprises a sealing groove, a sealing film and a rubber strip, the sealing groove is a double-layer structure comprising an arc-shaped groove one and an arc-shaped groove two, an elastic clamping piece is arranged on the upper end surface of the sealing groove, and clamping teeth are arranged on the inner side of the elastic clamping piece.

[0014] The present application has the following advantages:

[0015] 1. The present application discloses a grain warehouse manhole system, a platform panel is arranged above the grain loading line of the grain warehouse, a sampler is arranged on the platform panel, a ladder two is fixed to the side wall of the grain warehouse above the platform panel and extends to a manhole cover plate, a through hole is arranged on the side edge of the platform panel, a ladder one extending downward is fixed to the side wall of the grain warehouse below the through hole, and the ladder one, the ladder two and the platform panel can meet the sampling operation in the warehouse, and when there is a fire in the warehouse, the system can also be used for escape or fire fighting.

[0016] 2. The sampler is arranged on the platform panel, which is convenient for the operation personnel to enter the warehouse for sampling. In addition, a telescopic arm can be arranged on the sampler according to the need, the telescopic arm can adopt an electric remote control telescopic rod commonly used in the market or a curved arm telescopic arm, a stainless steel sampling pipe is fixed to the lower end of the telescopic arm, and the upper end of the stainless steel sampling pipe is connected to a sampling pipe of the sampler, so that the sampling depth is controlled by controlling the telescopic arm to extend to a depth below the grain surface, and the operation efficiency is increased.

[0017] 3. In this application, the manhole cover is fixed to the silo wall via mounting component one and mounting component two. Mounting component one is fixed to the upper surface of the manhole cover and extends to the side wall. Mounting component two has a stepped structure, with its bottom installed on the silo wall via explosion-proof bolts. The upper end of mounting component two extends to the side wall of the manhole cover and is fixedly connected to the lower part of the mounting component. The fixed connection can be a locking connection, i.e., a lock and a buckle are installed on mounting component one and mounting component two respectively, facilitating the opening and closing of the manhole cover. When the explosion pressure reaches 10-20 kPa, the manhole cover is compressed, generating an outward force that deforms the gasket on the explosion-proof bolt of mounting component two. The manhole cover opens under the impact of the explosion, achieving the function of explosion venting. The traction cable can prevent the manhole cover from flying around and injuring people during an explosion inside the silo.

[0018] 4. A sealing layer is installed below the manhole cover to further ensure the airtightness of the chamber. This sealing layer specifically uses a double-layer sealing groove to seal the sealing membrane. For ease of sealing, elastic clips are installed on the upper surface of the sealing groove, with clamping teeth on the inner side of the elastic clips. During sealing, the upper edge of the sealing membrane is first inserted into the elastic clips for fixation, and then the adhesive strip and sealing membrane are pressed into the sealing groove to achieve a seal. The operation is simple, and the sealing effect is excellent. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the manhole cover plate of the present invention;

[0020] Figure 2 This is a schematic diagram of the manhole structure of the present invention;

[0021] Figure 3 This is a schematic diagram of the planar structure of the platform panel inside the warehouse;

[0022] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of section aa;

[0023] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure of the middle section (bb);

[0024] Figure 6 for Figure 5 Enlarged view at the top;

[0025] Figure 7 for Figure 6 Enlarged view of number A;

[0026] Figure 8 This is a schematic diagram of the telescopic arm in Example 2;

[0027] Figure 9 This is a schematic diagram of the planar structure of the platform panel inside the warehouse in Example 2;

[0028] Figure 10This is a schematic diagram of the inner sealing layer in Example 3.

[0029] In the diagram: 1-Platform panel, 2-Opening, 3-Ladder 1, 4-Ladder 2, 5-Manhole cover, 6-Grate plate, 7-Inner sealing layer, 8-Sampler, 9-Telescopic arm, 10-Hose, 11-Stainless steel pipe, 12-Stainless steel platform railing, 13-Safety guard, 14-Observation port, 15-Traction cable, 16-Handle, 17-Cylinder 1, 18-Piston rod 1, 19-Piston rod 2, 20-Oil hole 1, 21-Oil passage, 22-Oil hole 2, 23-Limiting part, 24-Oil hole 3, 25-Support part, 26-Slide rail, 27-Installation component 1, 28-Installation component 2, 29-Explosion-proof bolt, 30-Rainwater plate, 31-Outer sealing layer, 32-Sealing groove, 33-Sealing membrane, 34-Rubber strip, 35-Elastic clamping piece, 36-Clamping tooth, 37-Slide rail. Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0031] like Figures 1-7 As shown, a grain silo manhole system includes a platform panel 1 installed on the upper part of the grain silo, located above the loading line. An opening 2 is provided on the side of the platform panel 1. Below the opening 2, a downward-extending ladder 3 is fixed to the side wall of the grain silo, extending below the loading line and, if necessary, directly to the bottom of the silo. Above the platform panel 1, a second ladder 4 is fixed to the side wall of the grain silo, extending upward to a manhole cover 5 above the manhole. In this application, the platform panel is made of steel grating with a load-bearing capacity of not less than 2.5 KN / m. 2 The ladders 1 and 2 on the platform panel are staggered, with their openings located on the side. This ensures the strength of the platform panel 1 and provides a resting platform, reducing the risk of workers falling.

[0032] The fixing of ladder 3 and ladder 4 in this application is achieved by first installing embedded parts on the inner wall of the grain silo, and then fixing both sides of ladder 3 and ladder 4 to the embedded parts. The sides of ladder 3 and ladder 4 are made of steel pipe with a diameter of 65mm, and the middle step is made of steel pipe with a diameter of 32mm, which is convenient for installation and has high strength. Moreover, the top of ladder 3 and the bottom of ladder 4 are welded and fixed to the platform panel 1, which has strong stability.

[0033] A sampler 8 is installed on the platform panel 1 to facilitate sampling operations for workers. Stainless steel platform railings 12 are installed around the platform panel 1; a safety cage 13 is installed on the outside of the ladder 3 to protect the safety of workers.

[0034] The manhole cover plate 5 is installed at the manhole and plays a sealing protection role. The installation piece one 27 and the installation piece two 28 are used to fix the manhole cover plate 5 and the warehouse wall. The specific structure is that the installation piece one 27 is fixed on the upper end surface of the manhole cover plate 5 and extends to the side wall along the upper end surface of the manhole cover plate. The installation piece two 28 is a stepped structure. The bottom of the installation piece two 28 is installed on the warehouse wall through the explosion-proof bolt 29. The upper end of the installation piece two 28 extends to the side wall of the manhole cover plate 5 and is fixedly connected with the lower part of the installation piece one 27. The connection mode can adopt detachable bolt connection or lock buckle connection. In the embodiment, the lock buckle connection is adopted, which facilitates opening of the manhole cover plate 5.

[0035] The handle 16 is fixed on the side edge of the upper surface of the manhole cover plate 5, which facilitates opening or closing of the manhole cover plate 5. The bottom end surface of the manhole cover plate 5 is connected with the inner wall of the warehouse through the traction cable 15.

[0036] In addition, in order to ensure the waterproofness of the manhole cover plate, the rainwater plate 30 is fixed on the outer periphery of the manhole cover plate 5. The outer edge of the rainwater plate 30 is folded inward and is just clamped on the outer wall of the manhole, which can further play a sealing and waterproof role.

[0037] The manhole cover plate 5 of the application has a pressure relief effect. When the explosion pressure reaches 10-20 Kpa, the manhole cover plate 5 is pressed to generate an outward force, the gasket on the explosion-proof bolt 29 on the installation piece two 28 is deformed, the manhole cover plate 5 is opened under the explosion impact, the pressure relief effect is realized, and the traction cable 15 can prevent the manhole cover plate 5 from flying randomly and injuring people when the warehouse explodes.

[0038] The grid plate 6 is arranged below the manhole cover plate 5. The grid plate 6 is used for grain condition detection and can also be used as a temporary storage rack. In addition, the grid plate 6 can buffer space to avoid personnel directly facing the warehouse bottom from the warehouse top manhole. Furthermore, when the manhole is opened for ventilation, the operation personnel can be prevented from falling into the warehouse, thereby improving the operation safety.

[0039] The grid plate 6 is connected to the inner wall of the warehouse through a hinge. An inner sealing layer 7 is arranged below the grid plate 6 and is used for sealing the grain surface.

[0040] In addition, in order to increase the sealing property of the manhole system, the sealing paste is used to seal the junction between the finished surface of the warehouse top roof and the outer wall of the manhole to form an outer sealing layer 31.

[0041] When entering the warehouse for operation, the manhole cover plate 5, the grid plate 6 and the sealing layer 7 need to be opened, the ladder two 4 is used to enter the platform panel 1, and sampling operation or warehouse safety monitoring is performed on the platform panel. In addition, the ladder one 3 in the through hole 2 arranged on the side edge of the platform panel 1 can be used to go down to the grain loading surface. The manhole system is convenient for operation personnel to enter and exit the warehouse for operation and fire escape and has high safety. Embodiment 2

[0042] The difference between embodiment 2 and embodiment 1 is that the sampler 8 in this application adopts Chengdu Zhongcun Grain JQYS1600W electric grain depot sampler, and the telescopic arm 9 is arranged on the sampler 8, and the sampler 8 is connected with the hose 10, wherein the length of the hose is 25 m, the bottom end of the hose 10 is connected with the stainless steel pipe 11, the length of the pipe is 1.2 m, and the stainless steel pipe 11 is fixed at the bottom end of the telescopic arm 9.

[0043] The telescopic arm 9 can adopt the commonly used curved arm telescopic arm, electric remote control telescopic rod on the market, or can also adopt a hydraulic telescopic rod, which is controlled to be displaced downward to a certain height, and then the sampler 8 is opened to perform sampling operation, which can reduce the working strength of the operator, and compared with the large sampling machine, the structure saves cost, occupies small area and has higher practicability.

[0044] The telescopic arm 9 of the embodiment is a multi-stage hydraulic telescopic rod, as shown in Figure 8 , which comprises a cylinder one 17, a piston rod one 18 arranged in the cylinder one 17, a limiting part 23 arranged at the bottom end of the cylinder one 17 for limiting the piston rod one 18, a piston rod two 19 arranged in the hollow middle part of the piston rod one 18, an oil hole one 20 arranged at the front side of the cylinder one 17, an oil channel 21 arranged at the side of the piston rod one 18, an oil hole two 22 arranged at the lower end side of the cylinder one 17 and communicated with the oil channel 21, and the oil hole two 22 is just communicated with the oil channel 21 when the piston rod one 18 moves to the lowermost position; the inner cavity of the cylinder one 17 and the inner cavity of the piston rod one 18 are connected through an oil hole three 24. The inner wall of the piston rod one 18 and the inner wall of the piston rod two 19 are both provided with sealing rings to prevent oil leakage, and the stainless steel pipe 11 is fixed at the bottom end of the piston rod two 19.

[0045] The working principle is that the hydraulic oil enters the inside of the cylinder one 17 through the oil hole one 20, pushes the piston rod one 18 to move downward to realize elongation, and the hydraulic oil inside the cylinder one 17 and the piston rod one 18 is discharged through the oil hole two 22; continue to inject oil, when the piston rod one 18 moves to the lowermost end, the hydraulic oil enters the inner cavity of the piston rod one 18 through the oil hole three 24, pushes the piston rod two 19 to move downward, the hydraulic oil in the inner cavity of the piston rod one 18 flows out through the oil channel 21 and the oil hole two 22, and the stainless steel pipe 11 fixed at the bottom end of the piston rod two 19 enters the grain to sample as the telescopic arm is elongated.

[0046] The supporting part 25 is arranged outside the cylinder one 17, the slide 26 is symmetrically arranged on the two sides of the supporting part, the parallel slide rail 37 is fixed outside the platform panel 1, as shown in Figure 9 , and the slide 26 is correspondingly installed on the slide rail 27, so that the telescopic arm 9 can be moved as needed, which is more practical and labor-saving.

[0047] When sampling is carried out on the platform panel 1, the telescopic arm is moved to the sampling site on the slide rail 27 as required (while moving the sampler 8), and then the telescopic arm 9 is operated to extend to the specified depth, the sampler 8 is opened to carry out the sampling operation, which is simple and practical. Example 3

[0048] Example 3 differs from Example 2 in that the inner sealing layer 7 is a sealing film sealing layer, the cross-sectional structure of which is shown in Figure 10 Fig. 3, and includes a sealing groove 32, a sealing film 33 and a rubber strip 34. The sealing groove 32 is fixed on the wall of the bin by expansion screws and has a double-layer structure including an arc-shaped groove one and an arc-shaped groove two. An elastic clamping piece 35 is arranged on the upper end surface of the sealing groove 32. The elastic clamping piece 35 is made of plastic and has an opening on the right side, so it has a certain deformation performance. A clamping tooth 36 is arranged inside the elastic clamping piece 35. Therefore, when carrying out the sealing operation, the upper edge of the sealing film 33 can be clamped into the elastic clamping piece 35 for fixation, and then the rubber strip 34 and the sealing film 33 are pressed into the sealing groove 32 to realize sealing. The operation is excellent and the sealing effect is excellent.

[0049] Finally, it should be pointed out that the above examples are only used to illustrate the technical solutions of the present application and not to limit it. Other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A manhole system for grain storage, characterized in that: The system includes a platform panel (1) located on the upper part of the grain silo, an opening (2) on the side of the platform panel (1), a downward-extending ladder (3) inside the opening (2), a second ladder (4) on the side wall of the grain silo above the platform panel (1), the second ladder (4) extending upward to a manhole cover (5), a grid plate (6) below the manhole cover (5), and an inner sealing layer (7) below the grid plate (6); a sampler (8) is provided on the platform panel (1). The manhole cover (5) is connected to the warehouse wall via mounting part one (27) and mounting part two (28). Mounting part one (27) is fixed to the upper end face of the manhole cover (5) and extends to the side of the manhole cover (5). Mounting part two (28) is a stepped structure. Its bottom is fixedly connected to the warehouse wall by explosion-proof bolts (29), and its upper part extends to the side of the manhole cover (5) and is fixedly connected to mounting part one (27). The manhole cover (5) has an observation port (14) in the center and a handle (16) on the side. The manhole cover (5) is a sandwich color steel plate. The bottom end of the manhole cover (5) is connected to the warehouse wall by a traction cable (15). The inner sealing layer (7) includes a sealing groove (32), a sealing membrane (33) and an adhesive strip (34). The sealing groove (32) is a double-layer structure, including an arc groove one and an arc groove two. An elastic clip (35) is provided on the upper end face of the sealing groove (32), and a clip tooth (36) is provided on the inner side of the elastic clip (35).

2. The grain storage manhole system according to claim 1, characterized in that: The sampler (8) is equipped with a telescopic arm (9), the sampler (8) inlet is connected to a hose (10), the bottom of the telescopic arm (9) is provided with a stainless steel pipe (11), and the upper end of the stainless steel pipe (11) is connected to the hose (10).

3. A grain storage manhole system according to claim 1, characterized in that: The platform panel (1) is located above the grain loading line.

4. A grain storage manhole system according to claim 1, characterized in that: Stainless steel platform railings (12) are provided around the platform panel (1).

5. A grain storage manhole system according to claim 1, characterized in that: A safety cage (13) is installed on the outside of the ladder (3).

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