Ash hopper level gage

Abstract

The utility model discloses an ash bucket level gage which comprises an ash bucket, a high-position detection pipe is installed on the upper portion of the side wall of the ash bucket, a low-position detection pipe is installed on the lower portion of the side wall of the ash bucket, and air outlets of the high-position detection pipe and the low-position detection pipe penetrate through the ash bucket and penetrate into the ash bucket. An air inlet of the high-position detection pipe and an air inlet of the low-position detection pipe are connected with an air source through the air supply pipeline, a first electromagnetic valve is installed on the air supply pipeline connected with the high-position detection pipe, and a second electromagnetic valve is installed on the air supply pipeline connected with the low-position detection pipe. A compressed air source is used for supplying air into the low-position detection pipe or the high-position detection pipe, in a normal state, negative pressure exists in the detection pipe, after the detection pipe is covered with ash, the pressure in the detection pipe is gradually increased, the height of the ash can be calculated through the pressure transmitter, and the height of the ash can be calculated through mutual cooperation of the low-position detection pipe and the high-position detection pipe. And switching detection of the position of the ash material can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of ash level detection, and more specifically, it is an ash hopper level gauge. Background Art

[0002] The ash hopper of an electrostatic precipitator is the ash storage equipment at the lower part of the electrostatic precipitator. Above the ash hopper is an electrostatic precipitator or a bag filter. The ash material coming down from the dust collector falls into the ash hopper and is then transported to the ash silo for storage by the conveying equipment connected to the lower part of the ash hopper.

[0003] Level detection equipment is installed in the ash hopper. There are mainly two types of existing level gauges. One is a switch-type level gauge that can detect the ash material at a certain height in the ash hopper, and the other is a continuous-type level gauge that can detect the height of the ash material in the ash hopper in real time. However, both have the problem of insufficient detection stability. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to provide an ash hopper level gauge with high stability and convenient installation and use.

[0005] To solve the above technical problem, the utility model provides the following technical solution: An ash hopper level gauge includes an ash hopper. A high-level detection pipe is installed on the upper part of the side wall of the ash hopper, and a low-level detection pipe is installed on the lower part of the side wall of the ash hopper. The air outlets of the high-level detection pipe and the low-level detection pipe both penetrate through the ash hopper and extend into the ash hopper. The air inlets of the high-level detection pipe and the low-level detection pipe are respectively connected to a gas source through a gas supply pipeline. A first solenoid valve is installed on the gas supply pipeline connected to the high-level detection pipe, and a second solenoid valve is installed on the gas supply pipeline connected to the low-level detection pipe. Pressure transmitters are fluid-conducted on both the high-level detection pipe and the low-level detection pipe.

[0006] For the above ash hopper level gauge, the high-level detection pipe and the low-level detection pipe have the same structure. The low-level detection pipe includes an outer sleeve pipe and a special conduit. One end of the outer sleeve pipe penetrates through the ash hopper and is inserted into the ash hopper, and the other end of the outer sleeve pipe is a closed end. One end of the special conduit is inserted into the outer sleeve pipe from the closed end of the outer sleeve pipe, and the other end of the special conduit is fluid-conducted with the gas supply pipeline.

[0007] For the above ash hopper level gauge, the end of the outer sleeve pipe inserted into the ash hopper has an inclined surface, and the inclined surface is arranged towards the bottom of the ash hopper.

[0008] For the above ash hopper level gauge, the included angle A between the inclined surface and the axis of the outer sleeve pipe is 30 degrees.

[0009] For the above ash hopper level gauge, the end face of the air outlet of the special conduit is perpendicular to its axis, the end of the special conduit is located inside the outer sleeve, and the end of the special conduit extends to the inclined plane position.

[0010] For the above ash hopper level gauge, a ash hopper isolation valve is installed on the special conduit. One end of the outer sleeve outside the ash hopper is fixedly connected to one end of the ash hopper isolation valve. A connecting pipe is fixedly connected to the other end of the ash hopper isolation valve. The end of the special conduit is connected to the connecting pipe and is in fluid communication. A three-way valve is connected to the end of the connecting pipe. Another interface of the three-way valve is connected to a check valve, and the air supply pipeline is connected to the check valve.

[0011] For the above ash hopper level gauge, it further includes a main air pipe. One end of the main air pipe is connected to a gas source, and a three-way joint is connected to the other end of the main air pipe. The two air supply pipelines are respectively connected to the other two interfaces of the three-way joint, and the pressure transmitter is in fluid communication with the main air pipe.

[0012] For the above ash hopper level gauge, a manual isolation valve, an oil-water separator, and a flow regulating valve are sequentially arranged on the main air pipe along the air flow direction of the gas source. The pressure transmitter is connected to the main air pipe between the flow regulating valve and the three-way joint.

[0013] For the above ash hopper level gauge, it further includes a third solenoid valve and a purge pipeline. The air inlet of the third solenoid valve is in fluid communication with the gas source, the air outlet of the third solenoid valve is in fluid communication with one end of the purge pipeline, and the other end of the purge pipeline is in fluid communication with both the low-level detection pipe and the high-level detection pipe.

[0014] For the above ash hopper level gauge, the first solenoid valve, the second solenoid valve, and the pressure transmitter are respectively in communication connection with a controller.

[0015] The technical solution of the present utility model has achieved the following beneficial technical effects:

[0016] 1. When the ash hopper is in normal operation, the inside is in negative pressure. By introducing compressed air into the low-level detection pipe or the high-level detection pipe, under normal conditions, the inside of the detection pipe is in negative pressure. When the ash covers the detection pipe, the pressure inside the detection pipe gradually increases, and the height of the ash can be calculated through the pressure transmitter.

[0017] 2. Through the mutual cooperation of the low-level detection pipe and the high-level detection pipe, the switching detection of the ash position can be realized, thereby improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Structural schematic diagram of the present utility model;

[0019] Figure 2 Schematic diagram of the structure of the low-level detection tube of the utility model.

[0020] The reference numerals in the figure are represented as: 1-hopper; 2-low-level detection tube; 201-outer sleeve; 202-hopper isolation valve; 203-connecting pipe; 204-three-way valve; 205-check valve; 206-special conduit; 207-inclined plane; 3-high-level detection tube; 4-pressure transmitter; 5-flow regulating valve; 6-oil-water separator; 7-manual isolation valve; 8-first solenoid valve; 9-second solenoid valve; 10-air supply pipeline; 11-third solenoid valve; 12-purging pipeline; 13-controller; 14-main air pipe. Specific implementation manner

[0021] A hopper level gauge in this embodiment is as Figure 1 shown, including a hopper 1, a high-level detection tube 3 is installed on the upper part of the side wall of the hopper 1, a low-level detection tube 2 is installed on the lower part of the side wall of the hopper 1, the air outlets of the high-level detection tube 3 and the low-level detection tube 2 both penetrate through the hopper 1 and penetrate into the hopper 1, the air inlets of the high-level detection tube 3 and the low-level detection tube 2 are respectively connected to a gas source through the air supply pipeline 10, a first solenoid valve 8 is installed on the air supply pipeline 10 connected to the high-level detection tube 3, a second solenoid valve 9 is installed on the air supply pipeline 10 connected to the low-level detection tube 2, pressure transmitters 4 are fluidly connected to both the high-level detection tube 3 and the low-level detection tube 2. Specifically, one pressure transmitter 4 is installed on the air supply pipeline 10 between the low-level detection tube 2 and the second solenoid valve 9, and the other pressure transmitter 4 is installed on the air supply pipeline 10 between the high-level detection tube 3 and the first solenoid valve 8. The first solenoid valve 8, the second solenoid valve 9 and the pressure transmitter 4 are respectively communicatively connected to the controller 13; by setting the high-level detection tube 3 and the low-level detection tube 2, cooperating with the gas source and the pressure transmitter 4, the material level in the hopper 1 is calculated by monitoring the pressure change in the detection tube. The controller 13 can be a device such as an industrial control computer or a single-chip microcomputer in the prior art that can be programmed for automatic operation.

[0022] As Figure 1-2 shown, the high-level detection tube 3 and the low-level detection tube 2 have the same structure. The low-level detection tube 2 includes an outer sleeve 201 and a special conduit 206. One end of the outer sleeve 201 penetrates through the hopper 1 and is inserted into the hopper 1, the other end of the outer sleeve 201 is a closed end, one end of the special conduit 206 is inserted into the outer sleeve 201 from the closed end of the outer sleeve 201, and the other end of the special conduit 206 is fluidly connected to the air supply pipeline 10. By setting the outer sleeve 201, the function of protecting the internal special conduit 206 can be achieved.

[0023] As Figure 2As shown, the end face of the air outlet of the special conduit 206 is perpendicular to its axis. The end of the special conduit 206 is located inside the outer sleeve 201, and the end of the special conduit 206 extends to the position of the inclined plane 207. One end of the outer sleeve 201 is inserted into the inclined plane 207 at the end of the hopper 1, and the inclined plane 207 is arranged towards the bottom of the hopper 1; the included angle A between the inclined plane 207 and the axis of the outer sleeve 201 is 30 degrees. By setting the inclined plane 207, on the one hand, it can prevent dust from falling into the special conduit 206 when it falls, and on the other hand, when the ash material covers the outer sleeve 201, a small cavity can be formed below the inclined plane 207 to prevent the ash material from directly entering the special conduit 206 and causing blockage, which is beneficial for the air pressure to continue to diffuse outward, thereby improving the accuracy of detection.

[0024] As Figure 2 As shown, a hopper isolation valve 202 is installed on the special conduit 206. One end of the outer sleeve 201 outside the hopper 1 is fixedly connected to one end of the hopper isolation valve 202. A connecting pipe 203 is fixedly connected to the other end of the hopper isolation valve 202. The end of the special conduit 206 is connected to the connecting pipe 203 and is in fluid communication. A three-way valve 204 is connected to the end of the connecting pipe 203. Another interface of the three-way valve 204 is connected to a one-way valve 205, and the air supply pipeline 10 is connected to the one-way valve 205. By setting the one-way valve 205, the one-way valve 205 adopts a double-disc combined one-way valve, which can effectively prevent the dust in the hopper from flowing back; by setting the three-way valve 204, when blockage occurs or maintenance and cleaning are required, by switching the three-way valve 204, the detection pipe can be cleaned with hard objects such as iron wires.

[0025] As Figure 1 As shown, the hopper level gauge further includes a main air pipe 14. One end of the main air pipe 14 is connected to a gas source, and a three-way joint is connected to the other end of the main air pipe 14. The two air supply pipelines 10 are respectively connected to the other two interfaces of the three-way joint. The pressure transmitter 4 is in fluid communication with the main air pipe 14. A manual isolation valve 7, an oil-water separator 6, and a flow regulating valve 5 are sequentially arranged on the main air pipe 14 along the gas source flow direction. The pressure transmitter 4 is connected to the main air pipe 14 between the flow regulating valve 5 and the three-way joint.

[0026] As Figure 1 As shown, the hopper level gauge further includes a third solenoid valve 11 and a purging pipeline 12. The air inlet of the third solenoid valve 11 is in fluid communication with the gas source, the air outlet of the third solenoid valve 11 is in fluid communication with one end of the purging pipeline 12, and the other end of the purging pipeline 12 is in fluid communication with the low-level detection pipe 2 and the high-level detection pipe 3 respectively.

[0027] Working principle: In the initial state, the first solenoid valve 8 is closed, the second solenoid valve 9 is open, the manual isolation valve 7 is open, the hopper isolation valve 202 is open, and the air source passes through the manual isolation valve 7, the oil-water separator 6, the flow regulating valve 5, and the second solenoid valve 9 in sequence, and then enters the check valve 205, the three-way valve 204, and the hopper isolation valve 202 of the low-level detection tube 2, and finally enters the special conduit 206 and then enters the hopper 1. Under normal conditions, the hopper 1 is in a negative pressure state. After being regulated by the flow regulating valve 5, the flow rate of the compressed air conditioner is reduced, and the pipeline behind the flow regulating valve 5 is in a negative pressure state. When the ash level rises and covers the air outlet of the low-level detection tube 2, the internal pressure of the low-level detection tube 2 gradually increases and becomes positive pressure. The pressure transmitter 4 monitors the pressure in the pipeline in real time. After the pressure increases, the controller 13 obtains the pressure data and controls the second solenoid valve 9 to close and the first solenoid valve 8 to open, and the air source enters the high-level detection tube 3, so as to realize the detection of high-level ash and monitor whether the material level is within the safe range.

[0028] When the ash level continues to rise and covers the high-level detection tube 3, at this time the ash level is too high, and the controller can be externally connected to an alarm to give an alarm; the controller 13 controls the first solenoid valve 8 to close and the second solenoid valve 9 to open at regular intervals, such as every 1 hour, for the high-low level detection point switching. When the pressure in the low-level detection tube 2 is negative pressure, it switches to low-level detection, that is, maintains the current state where the first solenoid valve 8 is closed and the second solenoid valve 9 is open. When the pressure in the low-level detection tube 2 is still positive pressure, then control the first solenoid valve 8 to open and the second solenoid valve 9 to close, and continue the high-level detection.

[0029] At regular intervals, the controller 13 controls the third solenoid valve 11 to open, and the compressed air source directly enters the low-level detection tube 2 and the high-level detection tube 3 for large-flow purging to prevent blockage. While the third solenoid valve 11 is open, the first solenoid valve 8 and the second solenoid valve 9 are closed to prevent damage to the pressure transmitter 4 due to excessive pressure and avoid false alarms.

[0030] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the claims of this patent application.

Claims

1. An ash hopper level meter, comprising an ash hopper (1), characterized in that: A high-position detection tube (3) is installed on the upper part of the side wall of the ash hopper (1), and a low-position detection tube (2) is installed on the lower part of the side wall of the ash hopper (1). The air outlets of the high-position detection tube (3) and the low-position detection tube (2) both pass through the ash hopper (1) and penetrate into the ash hopper (1). The air inlets of the high-position detection tube (3) and the low-position detection tube (2) are respectively connected to the air source through an air supply pipeline (10). A first solenoid valve (8) is installed on the air supply pipeline (10) connected to the high-position detection tube (3), and a second solenoid valve (9) is installed on the air supply pipeline (10) connected to the low-position detection tube (2). The high-position detection tube (3) and the low-position detection tube (2) are both fluid-conducting with a pressure transmitter (4).

2. The ash hopper level meter according to claim 1, characterized in that: The high-position detection tube (3) and the low-position detection tube (2) have the same structure. The low-position detection tube (2) comprises an outer sleeve (201) and a dedicated conduit (206). One end of the outer sleeve (201) passes through the ash hopper (1) and is inserted into the ash hopper (1). The other end of the outer sleeve (201) is a closed end. One end of the dedicated conduit (206) is inserted into the outer sleeve (201) from the closed end of the outer sleeve (201). The other end of the dedicated conduit (206) is fluidically connected to the air supply pipeline (10).

3. The ash hopper level meter according to claim 2, characterized in that: The outer sleeve (201) is inserted into an inclined surface (207) at one end of the ash hopper (1), and the inclined surface (207) is arranged toward the bottom of the ash hopper (1).

4. The ash hopper level meter according to claim 3, characterized in that: The included angle A between the inclined surface (207) and the axis of the outer sleeve (201) is 30 degrees.

5. The ash hopper level meter according to claim 4, characterized in that: The air outlet end face of the dedicated conduit (206) is perpendicular to its axis, the end of the dedicated conduit (206) is located inside the outer sleeve (201), and the end of the dedicated conduit (206) extends to the position of the inclined surface (207).

6. The ash hopper level meter according to claim 2, characterized in that: An ash hopper isolation valve (202) is installed on the dedicated conduit (206); one end of the outer casing (201) located outside the ash hopper (1) is fixedly connected to one end of the ash hopper isolation valve (202); a connecting pipe (203) is fixedly connected to the other end of the ash hopper isolation valve (202); an end of the dedicated conduit (206) is connected to the connecting pipe (203) and fluidly communicated; a three-way valve (204) is connected to the end of the connecting pipe (203); another interface of the three-way valve (204) is connected to a one-way valve (205); and the air supply pipeline (10) is connected to the one-way valve (205).

7. The ash hopper level meter according to claim 1, characterized in that: It also comprises a main air pipe (14), one end of which is connected to an air source, the other end of which is connected to a three-way joint, the two air supply pipelines (10) are respectively connected to the other two interfaces of the three-way joint, and the pressure transmitter (4) is fluidically connected to the main air pipe (14).

8. The ash hopper level meter according to claim 7, characterized in that: A manual isolation valve (7), an oil-water separator (6) and a flow regulating valve (5) are sequentially arranged on the main air pipe (14) along the flow direction of the air source, and the pressure transmitter (4) is connected to the main air pipe (14) between the flow regulating valve (5) and the three-way joint.

9. The ash hopper level meter according to claim 1, characterized in that: It also includes a third solenoid valve (11) and a purge pipeline (12), wherein the air inlet of the third solenoid valve (11) is in fluid communication with the air source, the air outlet of the third solenoid valve (11) is in fluid communication with one end of the purge pipeline (12), and the other end of the purge pipeline (12) is respectively in fluid communication with the low-position detection tube (2) and the high-position detection tube (3).

10. The ash hopper level meter according to claim 1, characterized in that: The first solenoid valve (8), the second solenoid valve (9) and the pressure transmitter (4) are respectively connected to a controller (13) for communication.

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