CN104555486B - A kind of intelligent spiral impeller propulsion type feeding equipment - Google Patents

Abstract

The invention provides an intelligent spiral impeller propulsion type feeding equipment, which is used in the feeding structure and includes a cylinder body, several impeller shafts and a driving device. The cylinder is in the shape of a cone, an ellipse or a square with openings at both ends. Several impeller shafts are distributed along the inner wall of the cylinder. Each impeller shaft includes a rotating shaft and several impellers. The impellers on two adjacent impeller shafts are staggered and installed on the on the axis of rotation. The driving device includes a hydraulic motor and a hydraulic control system, and each impeller shaft is provided with a hydraulic motor. The hydraulic system is connected with the hydraulic motor to form a hydraulic circuit. The hydraulic system provides power for the hydraulic motor and controls the speed and steering of the impeller shaft. At the same time, the hydraulic control system monitors the pressure and flow of the entire hydraulic circuit. The invention sets the impeller shaft on the inner wall of the cylinder to assist the flow speed of the material and prevent the clogging of the coal material. It is suitable for various types of materials and realizes remote control through the cooperation of the hydraulic control system and the hydraulic motor.

Description

An intelligent screw impeller propulsion feeding equipment

technical field

The technical field of feeding equipment design of the present invention, in particular relates to an intelligent spiral impeller propulsion type feeding equipment.

Background technique

In recent years, the price of coal market has changed significantly. The coal fired by thermal power plants, cement, and iron and steel enterprises deviates far from the designed coal type. Boilers frequently experience unstable combustion, coal failure, large temperature fluctuations, and boiler reheaters after overdraft of coal fired. And the overheating phenomenon of superheater is serious, the economy drops sharply, the fire is forced to cease fire after cooling, the load is reduced, and the amount of cooling water is increased accordingly. In order to maintain the safe operation of the boiler, a large amount of fuel oil is invested to maintain the operation. When the situation is urgent, the boiler fire extinguishing phenomenon will occur. Most of these problems are caused by the blockage of the raw coal bunker feeding system. When the blockage is serious, the normal operation and safe production of the equipment will be affected. Repair the clogged part.

The operation personnel of the enterprise are under great psychological pressure for the coal blocking situation every day. Most of the time, the main value and the secondary value are concerned about the operation status of the coal bunker system, and are equipped with coal hopper maintenance personnel. Deal with it in time to maintain the normal operation of the boiler.

The shape of the silo structure is basically the same, the upper part is square or round, and the lower part is square cone, conical or hyperbolic. The upper port is large and the lower port is small. The upper port feeds the material and the lower port discharges the material. The material falls from top to bottom by its own weight. The falling material flows in the conical container, so the more it flows downward, the smaller the area is, which will squeeze the material itself, and the increase of the friction coefficient is often the main cause of blockage. In addition, the moisture content, thickness, temperature change of the material, the length of time the material is stored in the silo, and the friction coefficient of the silo wall are the basic reasons for blockage.

At present, enterprises mostly use air cannons, rapping machines, hydraulic dredging machines, rotary scrapers, and ultrasonic equipment to control coal sticking in coal falling pipes. The phenomenon of coal sticking in the coal falling pipe cannot be completely controlled.

Contents of the invention

The present invention is an intelligent spiral impeller propulsion type feeding equipment, which comprises:

The cylinder is in the shape of a cylinder with two ends open, the upper port of the cylinder is fed, and the lower port of the cylinder is discharged;

A number of impeller shafts are distributed along the inner wall of the cylinder, the upper and lower ends of the impeller shafts are respectively connected with the upper and lower ends of the cylinder, the impeller shafts include a rotating shaft and several impellers, and the several impellers disposed on said axis of rotation;

The driving device is connected with the impeller shaft and is used to provide power for the impeller shaft and drive the impeller shaft to rotate.

In some embodiments, the impellers on the two adjacent impeller shafts are installed in a staggered manner.

In some embodiments, the impellers on the two adjacent impeller shafts can bite into each other's rotating shafts.

In some embodiments, the blades of the impeller have a helix angle.

In some embodiments, the connection between the impeller shaft and the barrel is sealed.

In some embodiments, the impeller is manufactured by a high-chromium wear-resistant alloy precision casting process. .

In some embodiments, the barrel is a hollow inverted cone.

In some embodiments, the driving device adopts a hydraulic device, and the hydraulic device includes a hydraulic motor and a hydraulic control system connected thereto; each of the impeller shafts is provided with the hydraulic motor, and the hydraulic motor drives The impeller shaft rotates and the hydraulic control system powers the hydraulic motor.

In some embodiments, the hydraulic control system is connected with the hydraulic motor to form a hydraulic circuit. The hydraulic control system provides power for the hydraulic motor and controls its speed and steering. At the same time, the hydraulic control system controls the entire hydraulic The pressure and flow of the circuit are monitored.

Compared with the prior art, the present invention has the following advantages and positive effects due to the adoption of the above technical solutions:

(1) By setting the impeller shaft on the inner wall of the cylinder, under the action of the rotation of the impeller shaft, the coal material is pushed downward to assist the flow speed of the coal material, prevent the coal material from clogging, and the coal material with high water content can also pass through smoothly. It is suitable for various types of materials;

(2) Through the design of the position and structure of the impeller on the impeller shaft, the coal material is prevented from sticking to the impeller shaft, and it can be cleaned by itself;

(3) Through the combined use of the hydraulic control system and the hydraulic motor, remote control can be realized, and the speed and direction of rotation of the impeller shaft can be controlled to control the coal feeding speed, and the entire hydraulic control system can also be monitored to achieve Unattended intelligent automatic control.

Description of drawings

The above and other features and advantages of the present invention can be more clearly understood through the following detailed description in conjunction with the accompanying drawings, wherein:

Fig. 1 is the schematic diagram of the application installation structure of the present invention;

Fig. 2 is a structural representation of the present invention;

Fig. 3 is a schematic structural view of two adjacent impeller shafts;

Figure 4 is a power schematic diagram of the hydraulic control system.

Symbol Description:

1-Intelligent screw impeller propulsion feeding equipment

2-coal bunker

3- Coal feeder

11-Cylinder

12-axis of rotation

13-Impeller

14-Hydraulic motor

41-Motor pump set

42-oil tank

43-throttle valve group

44-Reversing valve

45-Relief valve

46-pressure gauge

detailed description

The invention will be described in more detail hereinafter with reference to the accompanying drawings showing embodiments of the invention. However, this invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In these drawings, the size and relative sizes of layers and regions may be exaggerated for clarity.

Referring to Figures 1-3, the present invention provides an intelligent spiral impeller propulsive feeding device, which can remotely control the circulation of propelled materials and prevent the clogging of materials entering the feeder from the silo. The following is used in thermal power plants Take the coal bunker as an example for detailed description. As shown in Figure 1, the upper end of the intelligent spiral impeller propulsion feeding equipment 1 provided by the present invention is connected with the coal bunker 2, and its lower end is connected with the coal feeder. After feeding equipment 1, it enters the coal feeder for combustion and power generation.

In this embodiment, as shown in FIG. 2 , the intelligent screw impeller propulsive feeding equipment includes a cylinder body 11 , an impeller shaft, and a driving device. Specifically, the cylinder body 11 is in the shape of a conical barrel, and its inner diameter gradually decreases from top to bottom. The cylinder body 11 is provided with openings up and down. The upper opening of the cylinder body 11 communicates with the coal bunker 2, and the lower opening of the cylinder body 11 Connected with coal feeder 3. A number of impeller shafts are evenly distributed along the inner wall of the cylinder 11, and the upper and lower ends of the impeller shafts are respectively connected to the top and bottom of the cylinder 11, and the connection between the impeller shaft and the cylinder 11 is sealed to prevent coal leakage; in this embodiment There are 20-80 impeller shafts evenly distributed on the inner wall of the middle cylinder 11. Of course, the number of impeller shafts can be set according to the specific conditions such as the size of the equipment, and there is no limitation here.

Wherein, each impeller shaft includes a rotating shaft 12 on which 8-30 impellers 13 are uniformly installed, and the specific number of impellers is not limited here. The upper end of the rotating shaft 12 protrudes from the cylinder body 11, and each rotating shaft is connected with a driving device for driving the impeller shaft to rotate. Each impeller 13 is made up of three blades, and the shape of each blade has a certain helix angle, so that the impeller 13 can constantly scrape the surface of the lump of coal during the rotation process, so that the lump of coal becomes smaller gradually. Momentum for movement. In this embodiment, the impeller 13 is manufactured by a high-chromium wear-resistant alloy precision casting process, which ensures mechanical strength and long-term service life in harsh environments. Of course, the shape of the impeller 13 and the design number of the blades are not limited here, and can be designed according to specific requirements.

Referring to Fig. 3, A and B in the figure represent two adjacent impeller shafts respectively. The impellers on the two impeller shafts of A and B are staggered and installed up and down, and the blades of the impeller 13 of the two impeller shafts of A and B can bite each other to rotate The root of the shaft 12, thereby preventing the impeller shaft from being stuck together by coal to form a coal pillar, thereby affecting the working state of the impeller shaft.

In this embodiment, the driving device adopts a hydraulic device, which includes a hydraulic control system and a hydraulic motor 14. The hydraulic control system is connected with the hydraulic motor 14 to form a hydraulic circuit. On the one hand, the hydraulic control system provides power for the hydraulic motor 14 and The speed and steering are controlled, and the other hydraulic control system also monitors the pressure and flow of the entire hydraulic circuit.

Referring to FIG. 4 , it is a power schematic diagram of the entire hydraulic control system, which includes a power part, a reversing control part, a reversing control part, a flow monitoring part, and a pressure monitoring part. The power part includes a motor pump unit 41 and an oil tank 42. The motor pump unit 41, the oil tank 42 and the hydraulic motor 14 form a hydraulic circuit, which is used to provide power to drive the hydraulic motor 14 to work, thereby driving the impeller shaft to rotate, and can control the hydraulic motor 14. The working speed is adjusted so that the speed of the impeller shaft can be adjusted steplessly within the range of 0-60 rpm; in the specific implementation process, all the hydraulic motors 14 can be divided into 3-6 groups, and each group consists of a Driven by the motor pump group 41, only one group of hydraulic motors can be operated at working hours, and multiple groups of hydraulic motors can also be operated at the same time, and multiple groups can be selected according to the site conditions, so that the entire equipment has great mobility during operation; of course, the hydraulic motor 14 The grouping situation can be specifically designed according to needs, which is not limited here.

In this embodiment, the reversing control part, the flow monitoring part and the pressure monitoring part are all arranged on the hydraulic circuit between the power part and the hydraulic motor. Among them, the reversing control part is used to control the steering of the hydraulic motor 14, so that the forward and reverse rotation of the impeller shaft can be adjusted according to the needs, which can be realized by installing a reversing valve 44 on the working circuit; the flow monitoring part is used for detection and control The working flow rate of the entire hydraulic control system can be realized by installing the throttle valve group 43; the pressure monitoring part is used to detect and control the working pressure of the entire hydraulic control system, and a pressure gauge 46 is installed on the hydraulic circuit to measure the pressure in the specific application , and then the pressure on the hydraulic circuit is controlled by installing the relief valve 45, and the torque of the impeller shaft can also be adjusted by adjusting the increase or decrease of the pressure of the entire hydraulic control system.

Of course, the driving device of the present invention is not limited to using a hydraulic device to drive the rotation of the impeller shaft, but can also be driven by mechanical means, such as using gears to drive the rotation of the impeller shaft, etc., which is not limited here.

The intelligent spiral impeller propulsive feeding equipment provided by the present invention, by setting the impeller shaft on the inner wall of the cylinder, under the rotation of the impeller shaft, the coal material is pushed to move downward, which assists the flow rate of the coal material, prevents the coal material from clogging, and has a large water content Coal material can also pass through smoothly, which is suitable for various types of materials; through the design of the position and structure of the impeller on the impeller shaft, the coal material is prevented from sticking to the impeller shaft, and it can be cleaned by itself; in addition, through the hydraulic control system Used in conjunction with a hydraulic motor, remote control can be realized, and the speed and direction of rotation of the impeller shaft can be controlled to control the coal feeding speed. It can also monitor the entire hydraulic control system to achieve unattended intelligent automatic control. Of course, the present invention is not only applicable to coal bunkers of power plants, but also can be applied to other feeding mechanisms, and has a wide range of applications.

To sum up, the present invention provides an intelligent screw impeller propulsive feeding device, which is used in the feeding structure, including a cylinder, several impeller shafts, and a driving device. The cylinder is in the shape of a cone with two ends open, and several impeller shafts are distributed along the inner wall of the cylinder. Each impeller shaft includes a rotating shaft and several impellers. The impellers on two adjacent impeller shafts are staggered and installed on the rotating shaft. The driving device includes a hydraulic motor and a hydraulic control system, and each impeller shaft is provided with a hydraulic motor. The hydraulic system is connected with the hydraulic motor to form a hydraulic circuit. The hydraulic system provides power for the hydraulic motor and controls the speed and steering of the impeller shaft. At the same time, the hydraulic control system monitors the pressure and flow of the entire hydraulic circuit. The invention sets the impeller shaft on the inner wall of the cylinder to assist the flow speed of the material and prevent the clogging of the coal material. It is suitable for various types of materials and realizes remote control through the cooperation of the hydraulic control system and the hydraulic motor.

Those skilled in the art will appreciate that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention. Although embodiments of the present invention have been described, it should be understood that the present invention should not be limited to these embodiments, and that changes and modifications may be made by those skilled in the art within the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. A kind of intelligent spiral impeller propulsion type feeding equipment, it is characterized in that, this intelligent spiral impeller propulsion type feeding equipment comprises: The cylinder is in the shape of a cylinder with two ends open, the cylinder is a hollow inverted cone, the upper port of the cylinder is fed, and the lower port of the cylinder is discharged; Several impeller shafts are distributed along the inner wall of the cylinder, the upper and lower ends of the impeller shafts are respectively connected with the upper and lower ends of the cylinder, the impeller shafts include a rotating shaft and several impellers, the Several impellers are coaxially arranged on the rotating shaft, and the several impellers are arranged at intervals along the length direction of the rotating shaft; the impellers on two adjacent impeller shafts are staggered, and the two adjacent impeller shafts The upper impellers can bite into each other's rotating shaft; The driving device is connected with the impeller shaft and is used to provide power for the impeller shaft and drive the impeller shaft to rotate. 2. The intelligent screw impeller propelling feeding device according to claim 1, characterized in that, the blades of the impeller have a helix angle. 3. The intelligent spiral impeller propelling feeding equipment according to claim 1, characterized in that the connection between the impeller shaft and the cylinder is sealed. 4. The intelligent spiral impeller propulsion feeding equipment according to claim 1, characterized in that, the impeller is manufactured by a high-chromium wear-resistant alloy precision casting process. 5. The intelligent spiral impeller propulsion type feeding equipment according to claim 1, wherein the driving device adopts a hydraulic device, and the hydraulic device includes a hydraulic motor and a hydraulic control system connected thereto; each of the The hydraulic motors are arranged on the impeller shafts, the hydraulic motors drive the impeller shafts to rotate, and the hydraulic control system provides power for the hydraulic motors. 6. The intelligent spiral impeller propulsion feeding equipment according to claim 5, characterized in that, the hydraulic control system is connected with the hydraulic motor to form a hydraulic circuit, and the hydraulic control system provides power for the hydraulic motor and Its speed and steering are controlled, and at the same time, the hydraulic control system monitors the pressure and flow of the entire hydraulic circuit.