Anti-blocking pulverized coal metering hopper for electrode paste

Abstract

The anti-blocking pulverized coal metering hopper for the electrode paste comprises a metering tank, a plate valve assembly and a pulse injection mechanism, the metering tank is in a funnel shape, a discharging opening is formed in the bottom of the metering tank, the discharging opening is fixedly connected with the plate valve assembly so as to control discharging of pulverized coal, and the pulse injection mechanism is fixedly connected with the side wall of the metering tank; the pulse blowing mechanism comprises an L-shaped blowing pipe, a plug, a pulse electromagnetic valve, a gas storage tank and a PLC, one end of the L-shaped blowing pipe extends into the metering tank, a pipe opening in the end of the L-shaped blowing pipe faces downwards, the pipe opening of the L-shaped blowing pipe is fixedly connected with the plug, a plurality of exhaust ports are formed in the side wall of the L-shaped blowing pipe so as to horizontally blow gas, and the gas storage tank is connected with the PLC. The other end of the L-shaped blowing pipe is arranged outside the metering tank and communicated with an air outlet of the pulse electromagnetic valve, an air inlet of the pulse electromagnetic valve is connected with an air outlet of the air storage tank through a pipeline, and the pulse electromagnetic valve is further electrically connected with the PLC. The pulse injection mechanism is provided with an L-shaped injection pipe, blocked pulverized coal is scattered through pulse injection, and the pulverized coal can fall off smoothly.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal powder weighing technical field especially, relates to a kind of electrode paste is prevented to block coal powder measuring hopper. BACKGROUND

[0002] Electrode paste is coal powder, pitch etc. binder knead according to certain proportion, and is prepared after calcination. Coal powder is weighed when discharging, needs to use measuring hopper. Because the particle of coal powder is very small, there is very strong friction between coal powder, and the discharge port of hopper is relatively small, and it is easy to block at discharge port. The means commonly used in prior art is to set vibration motor on the side wall of hopper, and the blocked coal powder is shaken off by vibration. However, when blocking is more serious, with the vibration, coal powder becomes more and more solid, leading to more difficult to fall, and blocking is more serious. SUMMARY

[0003] Therefore, it is necessary to provide an electrode paste preventing coal powder measuring hopper from blocking.

[0004] A kind of electrode paste is prevented to block coal powder measuring hopper, including measuring tank, plate valve assembly, pulse blowing mechanism, the measuring tank is funnel-shaped, the bottom of measuring tank is equipped with discharge port, discharge port is fixedly connected with plate valve assembly, to control the discharging of coal powder, pulse blowing mechanism is fixedly connected with the side wall of measuring tank;The pulse blowing mechanism includes L-shaped blowing pipe, plug, pulse solenoid valve, gas storage tank, PLC controller, one end of L-shaped blowing pipe extends into measuring tank and the pipe opening of end portion faces downward, the pipe opening of L-shaped blowing pipe is fixedly connected with plug, the side wall of L-shaped blowing pipe is equipped with several exhaust ports, to horizontally jet, the other end of L-shaped blowing pipe is outside measuring tank and is communicated with the gas outlet of pulse solenoid valve, the gas inlet of pulse solenoid valve is connected with the gas outlet of gas storage tank by pipeline, pulse solenoid valve is also electrically connected with PLC controller.

[0005] Preferably, the plate valve assembly includes shell, valve body, drive cylinder, cylinder solenoid valve, the shell is fixedly connected with the discharge port of measuring tank by flange, valve body is located in shell and is slidably connected with shell, one end of valve body is fixedly connected with the telescopic rod of drive cylinder, the cylinder body of drive cylinder is fixedly connected with shell, the gas inlet and gas outlet of drive cylinder are connected with cylinder solenoid valve, to control the flow direction of airflow, the cylinder solenoid valve is also electrically connected with PLC controller.

[0006] Preferably, the electrode paste preventing coal powder measuring hopper also includes blowing air inlet pipe, cylinder air inlet pipe, gas circuit pipeline, tee, the blowing air inlet pipe is connected with the gas inlet of gas storage tank, the cylinder air inlet pipe is connected with the gas inlet of cylinder solenoid valve, air inlet pipe, cylinder air inlet pipe, gas circuit pipeline are connected by tee.

[0007] Preferably, the L-shaped blowing pipe is fixedly connected with the pulse electromagnetic valve through a flange, so as to facilitate disassembly.

[0008] Preferably, the vertical part of the L-shaped blowing pipe is located on the central axis of the metering tank, so as to uniformly spray air, and the nozzle at the bottom of the L-shaped blowing pipe is 5-10 cm away from the plate valve.

[0009] Beneficial effects: the pulse blowing mechanism of the utility model is provided with an L-shaped blowing pipe, and the clogged coal powder is scattered by pulse air blowing, the friction between the coal powders is reduced, the coal powder can be smoothly dropped, thereby preventing the coal powder from blocking the discharge port of the metering tank, and the coal powder is not made to be compact during the scattering process, so that the anti-blocking effect is better. The exhaust port of the L-shaped blowing pipe is in the horizontal direction, and it is difficult for the coal powder to enter the L-shaped blowing pipe due to gravity. Even if the coal powder accumulates into the blowing pipe for a long time, the coal powder can be quickly cleaned out after the plug is pulled out, and the L-shaped blowing pipe is not blocked. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a preferable angle structure diagram of the electrode paste anti-blocking coal powder metering hopper.

[0011] Figure 2 It is another preferable angle structure diagram of the electrode paste anti-blocking coal powder metering hopper.

[0012] Figure 3 It is a sectional view of the electrode paste anti-blocking coal powder metering hopper.

[0013] Figure 4 It is a partial structure diagram. Figure 3

[0014] In the figure: the electrode paste anti-blocking coal powder metering hopper 10, the metering tank 20, the plate valve assembly 30, the shell 301, the valve body 302, the driving cylinder 303, the cylinder electromagnetic valve 304, the pulse blowing mechanism 40, the L-shaped blowing pipe 401, the exhaust port 4011, the plug 402, the pulse electromagnetic valve 403, the gas storage tank 404, the blowing air inlet pipe 50, the cylinder air inlet pipe 60, the air path pipeline 70, the three-way pipe 80. DETAILED DESCRIPTION

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0016] Please refer to Figures 1 to 4 ​The application relates to an anti-blocking coal powder metering hopper for electrode paste, which comprises a metering tank 20, a plate valve assembly 30 and a pulse blowing mechanism 40, wherein the metering tank 20 is funnel-shaped, the bottom of the metering tank 20 is provided with a discharge port, the discharge port is fixedly connected with the plate valve assembly 30 to control the discharging of the coal powder, and the pulse blowing mechanism 40 is fixedly connected with the side wall of the metering tank 20; the pulse blowing mechanism 40 comprises an L-shaped blowing pipe 401, a plug 402, a pulse electromagnetic valve 403, a gas storage tank 404 and a PLC controller, one end of the L-shaped blowing pipe 401 extends into the metering tank 20 and the pipe opening at the end is downward, the pipe opening of the L-shaped blowing pipe 401 is fixedly connected with the plug 402, the side wall of the L-shaped blowing pipe 401 is provided with a plurality of exhaust ports 4011 to horizontally blow air, the other end of the L-shaped blowing pipe 401 is outside the metering tank 20 and is communicated with the air outlet of the pulse electromagnetic valve 403, the air inlet of the pulse electromagnetic valve 403 is connected with the air outlet of the gas storage tank 404 through a pipeline, and the pulse electromagnetic valve 403 is electrically connected with the PLC controller.

[0017] The metering tank 20 is used for containing the coal powder and feeding the coal powder in a certain amount, so that the coal powder is mixed with other raw materials in a certain proportion to prepare the electrode paste. The metering tank 20 is a commonly used device in the industry and will not be described in detail. The plate valve assembly 30 controls the discharging of the coal powder, and the plate valve assembly 30 is controlled to be opened or closed by the PLC controller. The pulse blowing mechanism 40 blows the coal powder. Under normal circumstances, the coal powder can be naturally discharged, but when the coal powder is blocked, the pressure of the metering tank 20 no longer changes, at this time, the PLC controller controls the pulse electromagnetic valve 403 to pulse blow air to blow away the coal powder. Compared with continuous blowing, the pulse blowing mode firstly significantly reduces the air consumption. Secondly, the pulse form is more conducive to the falling of the coal powder. The pipe opening of the L-shaped blowing pipe 401 and the plug 402 can be detachably connected. For example, the pipe wall of the L-shaped blowing pipe 401 is provided with internal threads, and the plug 402 is provided with external threads, so that the L-shaped blowing pipe 401 is threadedly connected with the plug 402. In this way, the plug 402 cannot be blown away by high-pressure gas. Of course, the L-shaped blowing pipe 401 and the plug 402 can also be interference-fitted. For example, the plug 402 is used to plug the pipe opening of the L-shaped blowing pipe 401. The blowing port of the L-shaped blowing pipe is in the horizontal direction, and the coal powder does not easily block the pipe opening under the action of gravity when it is not working. When blowing, the coal powder in the pipe is also blown out of the pipe under the action of pressure, and the pipe will not be blocked in a short period of time. When the coal powder is accumulated in the pipe for a long time, the L-shaped blowing pipe 401 is detached, and the plug 402 is pulled out, so that the coal powder can be discharged. Or, the L-shaped blowing pipe 401 is not directly detached, but the plug 402 is pulled out after the metering tank 20 is emptied, and the coal powder in the pipe is discharged by pulse blowing. If the plug 402 is not installed, the airflow of the L-shaped blowing pipe 401 will be discharged from the pipe opening, the pressure of the pipe wall is small, and the airflow discharged from the exhaust port 4011 is difficult to blow away the blocked coal powder.

[0018] In a preferred embodiment, the plate valve assembly 30 comprises a housing 301, a valve body 302, a driving cylinder 303, a cylinder solenoid valve 304, the housing 301 is fixedly connected with the discharge port of the metering tank 20 through a flange, the valve body 302 is located in the housing 301 and is in sliding connection with the housing 301, one end of the valve body 302 is fixedly connected with the telescopic rod of the driving cylinder 303, the cylinder body of the driving cylinder 303 is fixedly connected with the housing 301, the gas inlet and outlet of the driving cylinder 303 are connected with the cylinder solenoid valve 304 to control the flow direction of the gas flow, and the cylinder solenoid valve 304 is further electrically connected with the PLC controller.

[0019] Specifically, the cylinder solenoid valve 304 has two, one controls the extension of the driving cylinder 303, and the other controls the contraction of the driving cylinder 303. When discharging is needed, the PLC controller controls one of the cylinder solenoid valves 304 to be opened and the other to be closed, so that the driving cylinder 303 is contracted, the plate valve is pulled to be contracted, the discharge port of the metering tank 20 is opened, and the pulverized coal is discharged. After a predetermined amount of pulverized coal is discharged, the other cylinder solenoid valve 304 is controlled to be closed and the other is controlled to be opened, so that the driving cylinder 303 is elongated, the plate valve is pushed to be elongated, and the discharge port of the metering tank 20 is closed.

[0020] In a preferred embodiment, the electrode paste anti-blocking pulverized coal metering hopper 10 further comprises a blowing gas inlet pipe 50, a cylinder gas inlet pipe 60, a gas path pipeline 70, and a three-way pipe 80, the blowing gas inlet pipe 50 is connected with the gas inlet of the gas storage tank 404, the cylinder gas inlet pipe 60 is connected with the gas inlet of the cylinder solenoid valve 304, and the blowing gas inlet pipe, the cylinder gas inlet pipe 60 and the gas path pipeline 70 are connected through the three-way pipe 80.

[0021] The driving cylinder 303 and the pulse blowing mechanism 40 adopt the same gas path pipeline 70, the gas path pipeline 70 is divided into two branches through the three-way pipe 80, and the two branches are respectively used for supplying gas to the pulse blowing mechanism 40 and the driving cylinder 303.

[0022] In a preferred embodiment, the L-shaped blowing pipe 401 is fixedly connected with the pulse solenoid valve 403 through a flange, so as to facilitate disassembly. In this way, it is more convenient to replace or maintain the L-shaped blowing pipe 401.

[0023] In a preferred embodiment, the vertical part of the L-shaped blowing pipe 401 is located on the central axis of the metering tank 20 to uniformly blow air, and the distance between the bottom of the L-shaped blowing pipe 401 and the plate valve is 5-10 cm. The amount of air blown by the L-shaped blowing pipe 401 is limited, and the number of exhaust ports 4011 should not be too large, otherwise the air pressure will be insufficient. That is, the height of the L-shaped blowing pipe 401 is limited, if the distance from the plate valve is too small, the coal powder at the far position of the discharge port in the metering tank 20 cannot be blown, and the blockage cannot be eliminated. Similarly, if the distance between the pipe opening and the plate valve is far, the coal powder blown out of the pipe opening cannot reach, and the blockage problem cannot be eliminated. Therefore, the distance between the bottom of the L-shaped blowing pipe 401 and the plate valve is preferably 5-10 cm.

[0024] The above only discloses the preferred embodiments of the present application, of course, cannot limit the scope of the present application, those skilled in the art can understand that all or part of the above-mentioned embodiments can be implemented, and equivalent changes made according to the claims of the present application still belong to the scope of the present application.

Claims

1. A clogging-preventing coal powder measuring hopper for electrode paste, characterized by: The device comprises a measuring tank, a plate valve assembly, a pulse blowing mechanism, the measuring tank is funnel-shaped, the bottom of the measuring tank is provided with a discharge port, the discharge port is fixedly connected with the plate valve assembly to control the discharge of the pulverized coal, and the pulse blowing mechanism is fixedly connected with the side wall of the measuring tank.

2. The anti-clogging coal powder measuring hopper for electrode paste according to claim 1, characterized by: The plate valve assembly comprises a shell, a valve body, a driving cylinder and a cylinder electromagnetic valve, the shell is fixedly connected with the discharge port of the measuring tank through a flange, the valve body is located in the shell and is in sliding connection with the shell, one end of the valve body is fixedly connected with the telescopic rod of the driving cylinder, the cylinder body of the driving cylinder is fixedly connected with the shell, the inlet and outlet of the driving cylinder are connected with the cylinder electromagnetic valve to control the flow direction of the airflow, and the cylinder electromagnetic valve is also electrically connected with the PLC controller.

3. The anti-clogging coal powder measuring hopper for electrode paste according to claim 2, characterized by: The electrode paste anti-blocking pulverized coal measuring hopper also comprises a blowing inlet pipe, a cylinder inlet pipe, an air path pipeline and a tee joint pipe, the blowing inlet pipe is connected with the inlet of the gas storage tank, the cylinder inlet pipe is connected with the inlet of the cylinder electromagnetic valve, and the blowing inlet pipe, the cylinder inlet pipe and the air path pipeline are connected through the tee joint pipe.

4. The anti-clogging coal powder measuring hopper for electrode paste according to claim 1, wherein: The L-shaped blowing pipe and the pulse electromagnetic valve are fixedly connected through a flange, so as to be convenient for disassembly.

5. The anti-clogging coal powder measuring hopper for electrode paste according to claim 1, wherein: The vertical part of the L-shaped blowing pipe is located on the central axis of the measuring tank, so as to uniformly blow air, and the distance between the pipe opening at the bottom of the L-shaped blowing pipe and the plate valve is 5-10 cm.

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