Soft connection device for lime kiln coal powder weighing, discharging and conveying

Abstract

The utility model discloses a lime kiln coal powder weighing and discharging conveying flexible connecting device, include: integrative connecting pipe body, the inner wall of connecting pipe body is smooth continuous surface, and its inner diameter gradually reduces from the middle to both ends, forms a kind of dead angle free streamline passage, two respectively set in the locking clamp of connecting pipe body connecting end outside, and a protective structure covered in the outside of connecting pipe body. The utility model discloses by adopting integrative flexible connecting piece cooperation clamp connection, improves the comprehensive performance of equipment: the unique high flexibility of soft connecting piece can ensure that the weighing sensor's measurement accuracy is not interfered with rigid stress, its smooth, dead angle free inner wall fundamentally eliminates material residue, avoids the accumulated material and pollution problem caused by bolt, gap and wrinkle in traditional flange connecting place, and clamp connection mode saves the complicated hole and bolt fastening procedure, realizes quick installation and disassembly, reduces maintenance cost and time.

Description

Technical Field

[0001] This utility model relates to the technical field of coal powder weighing and feeding equipment, specifically to a flexible connection device for weighing, feeding and conveying coal powder in a lime kiln. Background Technology

[0002] The double-chamber lime kiln is one of the most advanced lime production equipment currently available, widely used in the production of industrial and building lime. It mainly consists of two vertical kiln chambers that mirror each other. During production, pulverized coal and combustion air are supplied to one side of the kiln chamber to create a high-temperature environment, causing the limestone inside to decompose at high temperatures; this is called the calcination chamber. The other side of the kiln chamber is filled with materials at room temperature, while the high-temperature flue gas generated in the combustion chamber is introduced from the bottom and discharged from the top, achieving the effect of preheating the materials; this side of the kiln chamber is called the regenerator chamber.

[0003] The pulverized coal weighing and conveying system mainly includes: pulverized coal silo, feeder, weighing machine, weighing and feeding sensor, screw conveyor pump, and pulverized coal Roots blower conveying pipeline; the main process is as follows: pulverized coal in the silo enters the weighing machine via the feeder. When the weighing machine feeds the coal, it is measured by the weighing sensor. At the same time, the pulverized coal enters the screw conveyor pump below through the flange-fixed rubber joint, and finally is blown into the rotary kiln burner for combustion through the Roots blower pipeline.

[0004] The existing technology has the following problems and disadvantages: 1. The weighing machine feeding port and the screw conveyor pump are connected by a flange-fixed rubber flexible connection. Although this rubber joint flexible connection has a certain degree of elasticity and can alleviate the vibration and impact between the equipment, this flexible connection is flange-fixed and forms a rigid connection with the coal powder weighing machine feeding port, which affects the coal powder weighing accuracy to a certain extent.

[0005] 2. This connection method has many contact surfaces with pulverized coal, and dead corners such as flanges can easily cause pulverized coal to accumulate and material to remain, thus affecting the accuracy of pulverized coal weighing. Utility Model Content

[0006] To address the aforementioned problems in the existing technology, the purpose of this utility model is to provide a flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln, comprising: A connecting tube body is integrally molded from a flexible material. The two ends of the connecting tube body are straight cylindrical connecting ends. The inner wall of the connecting tube body is a smooth continuous curved surface. Its inner diameter gradually decreases from the middle to both ends, forming a streamlined channel without dead angles. Two locking clamps, each sleeved on the outside of the connecting end of the connecting pipe body, are used to press and fix the connecting end to the external equipment interface; And a protective structure covering the outside of the connecting pipe body; The protective structure includes a first semi-annular cover and a second semi-annular cover. The two sides of the first semi-annular cover and the second semi-annular cover are detachably connected to each other through a quick-locking mechanism, thereby forming an annular cover that completely encloses the connecting tube.

[0007] As a preferred embodiment, the quick-lock mechanism includes a tenon disposed on the mating edge of the first semi-annular cover and a mortise disposed on the mating edge of the second semi-annular cover. The tenon can be slidably inserted or pulled out along the length direction of the mortise to achieve the connection and separation of the two.

[0008] As a preferred embodiment, the quick-lock mechanism is further provided with a limiting device, which includes a limiting bead 9 disposed in the tenon and a limiting recess 0 disposed on the mortise 42. The upper end of the limiting bead is connected to the top inner wall of the mortise 42 by a spring, and the limiting bead protrudes from the splicing surface under the action of the spring.

[0009] As a preferred embodiment, the inner walls of the first semi-annular cover and the second semi-annular cover are provided with a buffer pad layer that matches the shape of the outer surface of the connecting pipe, and a buffer cavity is formed between the protective structure and the connecting pipe.

[0010] As a preferred embodiment, the locking clamp is a quick clamp, comprising a clamp band and a locking bolt.

[0011] As a preferred embodiment, the inner ring of the locking clamp is fixed with a sealing gasket, which is pressed between the outer wall of the connecting pipe end and the external equipment interface when the clamp is locked.

[0012] As a preferred embodiment, the inner wall of the connecting tube is a smooth, continuous curved surface, and its inner diameter gradually decreases from the middle to both ends, forming a streamlined channel without dead angles.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention significantly improves the overall performance of the equipment by using an integrally molded flexible connector in conjunction with a clamp connection, replacing the traditional flange connection structure. The unique high flexibility of the flexible connector can effectively compensate for displacement and vibration between devices, ensuring that the weighing accuracy of the load cell is not affected by rigid stress. Its smooth, dead-angle-free inner wall fundamentally eliminates material residue, avoiding the material accumulation and contamination problems caused by bolts, gaps, and wrinkles at traditional flange connections. The clamp connection method eliminates the cumbersome hole alignment and bolt tightening process, enabling rapid installation and disassembly, and reducing maintenance costs and time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the specific structure of the present utility model. Figure 2 This is a schematic diagram of the locking clamp structure of this utility model; Figure 3 This is a schematic diagram of the protective structure and the buffer pad layer of this utility model. Figure 4 This is a schematic diagram of the specific structure of the quick-lock mechanism of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to specific embodiments.

[0016] A flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln includes: A connecting tube 1 is integrally molded from a flexible material. Both ends of the connecting tube 1 are straight cylindrical connecting ends. The inner wall of the connecting tube 1 is a smooth continuous curved surface, and its inner diameter gradually decreases from the middle to both ends, forming a streamlined channel without dead angles. Two locking clamps 2 are respectively fitted on the outside of the connecting end of the connecting pipe body 1 to press and fix the connecting end to the external equipment interface; And a protective structure 3 covering the outside of the connecting pipe body 1; The protective structure 3 includes a first semi-annular cover 31 and a second semi-annular cover 32. The two sides of the first semi-annular cover 31 and the second semi-annular cover 32 are detachably connected to each other through a quick-locking mechanism 4, thereby forming an annular cover that completely encloses the connecting tube 1.

[0017] In use, the straight cylindrical connecting sections at both ends of the connecting pipe body 1 are fitted onto the interface of the external equipment, and then the locking clamps 2 are used to firmly press and fix the connecting ends onto the interface of the external equipment, ensuring a tight and leak-free connection. Meanwhile, the smooth, continuous curved surface design of the inner wall of the connecting pipe body 1 allows for smooth passage of pulverized coal during feeding, reducing material accumulation and blockage caused by uneven inner walls or dead corners, effectively improving material feeding efficiency and ensuring the stability and smoothness of the entire equipment operation. Furthermore, this smooth, continuous curved inner wall design makes cleaning and maintenance easier; a simple rinse is sufficient to remove residual pulverized coal, reducing maintenance costs and time.

[0018] The protective structure 3 covering the outside of the connecting pipe body 1 has a first semi-annular cover 31 and a second semi-annular cover 32 that can be quickly and easily disassembled and installed through a quick-locking mechanism 4. When it is necessary to inspect or maintain the connecting pipe body 1, simply open the quick-locking mechanism 4 to separate the first semi-annular cover 31 and the second semi-annular cover 32 to operate on the connecting pipe body 1. After the operation is completed, they can be reassembled and locked to provide reliable protection for the connecting pipe body 1 and prevent it from being corroded and damaged by the external environment.

[0019] As a preferred embodiment, the quick-lock mechanism 4 includes a tenon 41 disposed on the mating edge of the first semi-annular cover 31 and a mortise 42 disposed on the mating edge of the second semi-annular cover 32. The tenon 41 can slide into or out along the length of the mortise 42 to achieve the connection and separation of the two. This kind of mating method between the tenon 41 and the mortise 42 not only ensures a stable connection and can withstand a certain amount of external impact without being easily separated, but also makes the operation very convenient. The operator does not need to use complicated tools. They only need to gently push or pull the first semi-annular cover 31 to make the tenon 41 slide along the mortise 42 to quickly complete the inspection and maintenance of the connecting pipe 1, which greatly improves the work efficiency and effectively prevents external dust, moisture and other impurities from entering the interior of the connecting pipe 1, further ensuring the normal operation of the connecting pipe 1 and the entire equipment.

[0020] In a preferred embodiment, the quick-lock mechanism 4 is further provided with a limiting device, which includes a limiting bead 9 disposed within the tenon 41 and a corresponding limiting recess 10 disposed on the mortise 42. The upper end of the limiting bead 9 is connected to the inner top wall of the mortise 42 via a spring. Under the action of the spring, the limiting bead 9 protrudes from the splicing surface. When the tenon 41 slides to the predetermined position where it fully engages with the mortise 42, the limiting bead 9 falls precisely into the corresponding limiting recess 10, producing a crisp "click" sound, providing the operator with clear feedback that the connection is in place. This design ensures that the quick-lock mechanism 4 will not loosen due to accidental vibration or external force in the connected state, further enhancing the stability and reliability of the connection. At the same time, the elasticity of the spring allows the limiting bead 9 to smoothly disengage from the limiting recess 10 when subjected to appropriate external force, facilitating unlocking operations for the operator without causing any damage to the connecting tube 1. When it is necessary to separate the first semi-annular cover 31 and the second semi-annular cover, only a pulling force along the sliding direction of the tenon (i.e. the opening direction) needs to be applied. When the applied external force is greater than the preload of the spring, the limiting ball 9 can be pressed back and dislodged from the limiting recess 10, so that the two protective shells can slide and separate in opposite directions.

[0021] Preferably, the edge of the limiting recess 10 is made with a smooth chamfer. This facilitates the smooth sliding of the limiting ball 9 into the recess for positioning when closed, and also makes it easier for the limiting ball 9 to disengage. It should be noted that the depth and chamfer of the opening of the limiting recess 10 are configured such that a directional tensile force much greater than the working vibration load is required to make the elastic ball 9 disengage from the recess.

[0022] In a preferred embodiment, the inner walls of the first semi-annular cover 31 and the second semi-annular cover 32 are provided with a buffer pad layer 11 that is adapted to the shape of the outer surface of the connecting pipe 1, and a buffer cavity 12 is formed between the protective structure and the connecting pipe 1.

[0023] In a preferred embodiment, the locking clamp 2 is a quick clamp, including a clamp strap 21 and a locking bolt 22. After the straight cylindrical connecting sections at both ends of the connecting pipe 1 are fitted onto the interface of the external equipment, the clamp strap 21 is wrapped around the connection between the straight cylindrical connecting section and the interface of the external equipment. The clamp strap 21 is tightly locked by the locking bolt 22, thereby ensuring a tight and stable connection between the protective structure 3 and the interface of the external equipment. This effectively prevents gaps caused by loosening, avoids external impurities from entering and damaging the connecting pipe 1, and can also better withstand various external forces that may occur during operation, ensuring the reliability and stability of the entire device.

[0024] In a preferred embodiment, a sealing gasket 23 is fixed to the inner ring of the locking clamp 2. When the clamp is tightened, the sealing gasket 23 is pressed between the outer wall of the connecting end of the connecting pipe 1 and the external equipment interface. The sealing gasket 23 is made of highly elastic, wear-resistant rubber material, possessing excellent sealing performance. It effectively prevents external moisture, dust, and other impurities from entering the connection between the connecting pipe 1 and the external equipment interface, further enhancing the overall protection level of the device. Simultaneously, the surface of the sealing gasket 23 undergoes special treatment, resulting in a low coefficient of friction. This prevents excessive wear on the connecting pipe 1 and the external equipment interface during clamp tightening, ensuring the long-term stability and reliability of the connection.

[0025] The contents not described in detail in this specification are existing technologies known to those skilled in the art, and their specifications and models can be selected according to actual conditions.

[0026] 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 embodiments 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 flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln, characterized in that, include: A connecting tube (1) is integrally molded from a flexible material. The two ends of the connecting tube (1) are straight cylindrical connecting ends. The inner wall of the connecting tube (1) is a smooth continuous curved surface. Its inner diameter gradually decreases from the middle to both ends, forming a streamlined channel without dead angles. Two locking clamps (2) are respectively fitted outside the connecting end of the connecting pipe body (1) to press and fix the connecting end to the external equipment interface. And a protective structure (3) covering the outside of the connecting tube (1); The protective structure (3) includes a first semi-annular cover (31) and a second semi-annular cover (32). The two sides of the first semi-annular cover (31) and the second semi-annular cover (32) are detachably connected to each other by a quick-locking mechanism (4) to form an annular cover that completely covers the connecting tube (1).

2. The flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln according to claim 1, characterized in that, The quick-lock mechanism (4) includes a tenon (41) disposed on the mating edge of the first semi-annular cover (31) and a mortise (42) disposed on the mating edge of the second semi-annular cover (32). The tenon (41) can slide into or out along the length direction of the mortise (42) to achieve the connection and separation of the two.

3. The flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln according to claim 2, characterized in that, The quick-lock mechanism (4) is also provided with a limiting device, which includes a limiting bead (9) set in the tenon (41) and a limiting recess (10) set on the mortise (42) respectively. The upper end of the limiting bead (9) is connected to the top inner wall of the mortise (42) by a spring. The limiting bead (9) protrudes from the splicing surface under the action of the spring.

4. The flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln according to claim 1, characterized in that, The inner walls of the first semi-annular cover (31) and the second semi-annular cover (32) are provided with a buffer pad layer (11) that is adapted to the shape of the outer surface of the connecting pipe (1), and a buffer cavity (12) is formed between the protective structure and the connecting pipe (1).

5. The flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln according to claim 1, characterized in that, The locking clamp (2) is a quick clamp, including a clamp band (21) and a locking bolt (22).

6. The flexible connection device for weighing, feeding, and conveying pulverized coal in a lime kiln according to claim 5, characterized in that, The inner ring of the locking clamp (2) is fixed with a sealing gasket (23), which is squeezed between the outer wall of the connecting end of the connecting pipe (1) and the external equipment interface when the clamp is locked.

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