Limestone feeding device

Abstract

The utility model discloses a limestone feeding device in the technical field of lime production equipment, the limestone feeding device comprises a rack and a discharging pipe fixed to the rack, a material distribution pipe is coaxially fixed to the discharging pipe, a rubber plate is rotatably connected to the bottom of the material distribution pipe, a motor is fixedly arranged on the rack, and the rubber plate is rotatably connected to the bottom of the material distribution pipe. The movable end of the motor is provided with a cam and a knocking disc which alternately abut against the bottom of the rubber plate, the knocking disc is located under the middle of the rubber plate, and the radius of the knocking disc is smaller than the distance between the longest end of the cam and the movable end of the motor and larger than the distance between the shortest end of the cam and the movable end of the motor; the discharging pipe is provided with an exhaust passage for exhausting towards the rubber plate, and further comprises a tail gas pipe communicated with the exhaust passage. According to the scheme, limestone powder adhered to the rubber plate is dried by using tail gas discharged by the rotary kiln, and the motor drives the cam to rotate quickly, so that the rubber plate swings up and down quickly to knock continuously, and the dried limestone powder is vibrated off to realize cleaning.

Description

TECHNICAL FIELD

[0001] The utility model relates to lime production equipment field, concretely relates to a limestone feeding device. BACKGROUND

[0002] Lime is a kind of air hardening inorganic cementing material with calcium oxide (CaO) as main component, it is by limestone, dolomite, chalk, shell etc. Calcium carbonate content high natural rock, it is decomposed by 900~1100 ℃ high temperature calcination.In this process, calcium carbonate (CaCO3) is decomposed into calcium oxide and carbon dioxide (CO2), and carbon dioxide escapes in the form of gas, leaving lime with calcium oxide as main component.

[0003] In lime production, limestone feeding device is one of the key equipment of calcination process, and its core function is to uniformly and continuously convey the crushed limestone raw material into lime kiln (such as rotary kiln, shaft kiln, etc.), to ensure the stability and efficiency of calcination process, and rotary kiln is a kind of heating limestone equipment, limestone (CaCO3) decomposition needs high temperature, and the internal temperature is usually between 1450°C ~ 1600°C, and the tail gas temperature reaches 300°C.

[0004] Referring to prior art CN221955103U, a limestone feeding device, including the feeding pipe, dust hood and cloth pipe, the cloth pipe lower surface is fixedly connected with the cloth pipe, the cloth pipe lower surface is rotatably connected with the rotating plate, the rotating plate upper surface is provided with the groove, the groove is fixedly installed with the rubber plate, the rubber plate outer surface is provided with the rubber strip, the cloth pipe outer surface is rotatably connected with the electric push rod, and the electric push rod tail end is rotatably connected with the rotating plate outer side. Limestone falls into the cloth pipe from the feeding pipe, and contacts the rubber strip on the surface of the rubber plate, and the rubber plate and the rubber strip play a buffering role for limestone, but it is found in actual application that limestone is wet (such as air moisture absorbed in the transportation process or storage process), and some limestone powder is easy to adhere to the inner wall of the rubber plate, which will cause material accumulation blockage if not cleaned for a long time. UTILITY MODEL CONTENTS

[0005] The utility model intends to provide a limestone feeding device to solve the problem that limestone powder is easy to adhere to the rubber plate in prior art, causing material accumulation blockage.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a kind of limestone feeding device, including frame and fixed blanking tube with frame, the blanking tube is coaxially fixed with distributing pipe, the bottom of the distributing pipe is rotatably connected with rubber plate, the frame is fixedly provided with motor, the movable end of the motor is provided with cam and knocking disc that alternately abuts with the bottom of rubber plate, the knocking disc is located just below the middle of rubber plate, the radius of the knocking disc is less than the distance between the longest end of cam and the movable end of motor, and greater than the distance between the shortest end of cam and the movable end of motor;The blanking tube is provided with exhaust passage towards the exhaust of rubber plate, and further comprising tail gas pipe communicated with exhaust passage.

[0008] The working principle and beneficial effects of the utility model are as follows:

[0009] The frame is installed at the feed inlet of the rotary pit, the rubber plate is supported by the cam, the limestone falls into the rubber plate from the blanking tube for buffering, and then falls into the rotary pit from the feed inlet, and the rubber plate plays a buffering role on the limestone.

[0010] When it is necessary to clean the limestone powder adhered to the rubber plate, stop feeding, introduce the tail gas discharged from the rotary pit into the exhaust passage by using the tail gas pipe, on the one hand, the tail gas blows towards the rubber plate to increase the surface temperature of the rubber plate and dry the adhered limestone powder to reduce the viscosity, on the other hand, the tail gas blows towards the distributing pipe and the blanking tube to increase the temperature inside them, so that when feeding is resumed after the rubber plate is cleaned, the internal temperature is increased to preheat and dry the limestone to reduce the moisture and the adhesion of the limestone powder. After the limestone powder adhered to the rubber plate is dried, the motor drives the cam and the knocking disc to rotate rapidly, the longest end of the cam is separated from the rubber plate, the rubber plate is rapidly swung downward to hit the knocking disc, and the above process is repeated to knock off the dried limestone powder.

[0011] The present scheme uses the tail gas discharged from the rotary pit to dry the limestone powder adhered to the rubber plate, and the cam is driven to rotate rapidly by the motor to realize the rapid up-and-down swinging of the rubber plate and the continuous knocking to shake off and clean the dried limestone powder.

[0012] In some embodiments, the tail gas pipe is provided with an exhaust fan. The exhaust fan pressurizes the tail gas to blow it out of the exhaust passage, improving the drying efficiency.

[0013] In some embodiments, the distributing pipe is provided with a baffle located directly above the exhaust passage. When the tail gas blows towards the rubber plate, the baffle blocks the rapid upward escape of the tail gas to improve the drying rate.

[0014] In some embodiments, the tail gas pipe is provided with a flow valve. The flow valve is closed during normal feeding and opened when cleaning is needed.

[0015] In some embodiments, the rubber plates are symmetrically arranged along the cloth pipe axis. The rubber plates on both sides play a better buffering effect.

[0016] In some embodiments, a spring is fixed between the rubber plate and the cloth pipe. When the rubber plate is lifted up by the cam, the spring is stretched, and when the cam is disengaged from the rubber plate, the spring returns, causing the rubber plate to quickly rotate towards the knocking disc, thereby increasing the knocking force between the rubber plate and the knocking disc and improving the impact cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Figure 1 is a schematic diagram of the internal structure of a limestone feeding device according to an embodiment of the present application.

[0018] Figure 2 Figure 2 is a schematic diagram of the structure of a rubber plate during cleaning. Figure 1 Figure 3 is a schematic diagram of the internal structure of a limestone feeding device according to another embodiment of the present application.

[0019] Figure 3 Figure 4 is a schematic diagram of the internal structure of a limestone feeding device according to another embodiment of the present application. DETAILED DESCRIPTION

[0020] The following will be further described in detail through specific embodiments:

[0021] The reference signs in the drawings of the specification include: rotary kiln 1, exhaust port 2, tail gas pipe 3, cam 4, feeding pipe 5, exhaust passage 6, rubber plate 7, motor 8, knocking disc 9, baffle 10, rack 11, cloth pipe 12.

[0022] In the following statements, the orientation words such as "left", "right", "up", "down" are based on the orientation of the drawings. If the corresponding structure is changed in the same direction based on the orientation, the relative position remains unchanged, which does not affect the implementation of the scheme.

[0023] Embodiment 1: A limestone feeding device, as shown in Figure 1 Figure 1, including a rack 11, a rotary kiln 1 and a feeding pipe 5 fixed to the rack 11, the rack 11 and the top of the rotary kiln 1 are fixedly connected, and the rotary kiln 1 includes an exhaust port 2. The cloth pipe 12 is coaxially fixed to the feeding pipe 5, and the bottom of the cloth pipe 12 is symmetrically rotatably connected to the rubber plate 7. The rubber plate 7 is produced by Shandong Hengtai Mining Co., Ltd., and the model is P43 high-temperature-resistant high-strength wear-resistant rubber plate 7.

[0024] The rack 11 is fixedly provided with a motor 8, the movable end of the motor 8 is fixedly sleeved with a cam 4 and a knocking disc 9 which alternately abut against the bottom of the rubber plate 7, the knocking disc 9 is located directly below the middle part of the rubber plate 7, the radius of the knocking disc 9 is smaller than the distance between the longest end of the cam 4 and the movable end of the motor 8, and is larger than the distance between the shortest end of the cam 4 and the movable end of the motor 8; the inside of the discharging pipe 5 is provided with an annular exhaust passage 6 which exhausts toward the rubber plate 7, and further comprises a tail gas pipe 3 which is fixedly connected with the exhaust passage 6 and in communication, the tail gas pipe 3 and the exhaust port 2 are fixedly connected and in communication.

[0025] The rack 11 is installed at the feeding port of the rotary kiln, the cam 4 supports the rubber plate 7, the limestone falls from the discharging pipe 5 to the rubber plate 7 for buffering, and then falls into the rotary kiln through the feeding port, the rubber plate 7 buffers the limestone.

[0026] As shown in Figure 2 When it is necessary to clean the limestone powder adhered to the rubber plate 7, the feeding is stopped, the tail gas discharged from the rotary kiln is introduced into the exhaust passage 6 through the tail gas pipe 3, on the one hand, the tail gas blows toward the rubber plate 7 quickly, increases the surface temperature of the rubber plate 7, and dries the adhered limestone powder, reduces the viscosity, on the other hand, blows toward the cloth pipe 12 and the discharging pipe 5, increases the temperature inside, so that when the feeding is started again after the cleaning of the rubber plate 7 is completed, the internal temperature is increased to preheat and dry the limestone, so as to reduce the moisture and the adhesion of the limestone powder as much as possible. After the limestone powder adhered to the rubber plate 7 is dried, the motor 8 drives the cam 4 and the knocking disc 9 to rotate quickly, the longest end of the cam 4 is separated from the rubber plate 7, the radius of the knocking disc 9 is smaller than the distance between the longest end of the cam 4 and the movable end of the motor 8, and is larger than the distance between the shortest end of the cam 4 and the movable end of the motor 8, so that the rubber plate 7 is quickly swung downward and hits the knocking disc 9, the above process is repeated for several times, and the dried limestone powder is knocked off.

[0027] The scheme uses the tail gas discharged from the rotary kiln to dry the limestone powder adhered to the rubber plate 7, and drives the cam 4 to rotate quickly through the motor 8, so as to realize the quick up-and-down swinging of the rubber plate 7 and the continuous knocking of the dried limestone powder to realize the cleaning.

[0028] Embodiment 2: The difference from embodiment 1 is that Figure 3As shown, the connecting mode of the knocking disc 9 is changed, that is, the knocking disc 9 is fixed with the top of the rotary kiln 1, and a center hole is arranged in the middle of the knocking disc 9, the diameter of the center hole is larger than the size of the movable end of the motor 8, that is, the center hole provides space for the movable end of the motor 8 to rotate, so that the knocking disc 9 remains stationary. The distance between the top of the knocking disc 9 and the movable end of the motor 8 is smaller than the distance between the longest end of the cam 4 and the movable end of the motor 8, and is larger than the distance between the shortest end of the cam 4 and the movable end of the motor 8, when the longest end of the cam 4 is away from the rubber plate 7, the rubber plate 7 is quickly swung by the downward gravity and hits the knocking disc 9. The cloth pipe 12 is fixedly provided with the baffle 10 located above the exhaust passage 6.

[0029] The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be ordered according to the description and the drawings, the specific connecting mode of each part adopts the conventional means such as bolts, rivets and welding in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connecting mode in the prior art, which will not be described in detail herein.

Claims

1. A limestone feeding device, comprising a frame and a feeding pipe fixed to the frame, wherein a feeding pipe is coaxially fixed to the feeding pipe, and a rubber plate is rotatably connected to the bottom of the feeding pipe, characterized in that: The frame is fixedly equipped with a motor. The movable end of the motor is provided with a cam and a striking plate that alternately abut against the bottom of the rubber plate. The striking plate is located directly below the middle of the rubber plate. The radius of the striking plate is smaller than the distance between the longest end of the cam and the movable end of the motor, and larger than the distance between the shortest end of the cam and the movable end of the motor. The feed pipe is provided with an exhaust duct that exhausts towards the rubber plate, and also includes a tailpipe that communicates with the exhaust duct.

2. The limestone feeding device according to claim 1, characterized in that: The exhaust pipe is equipped with a fan.

3. The limestone feeding device according to claim 2, characterized in that: The fabric tube is equipped with a baffle located directly above the exhaust duct.

4. The limestone feeding device according to any one of claims 1 to 3, characterized in that: The exhaust pipe is equipped with a flow valve.

5. The limestone feeding device according to claim 4, characterized in that: The rubber sheet is symmetrically arranged along the axis of the fabric tube.

6. The limestone feeding device according to claim 5, characterized in that: A spring is fixed between the rubber sheet and the fabric tube.

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