Level gage and dust remover

Abstract

The utility model discloses a level gage and a dust remover, and solves the technical problem that when a level gage is used for detecting the level at present, powder is easy to block a detection hole, so that the detection of the level has an error. The utility model provides a level gage. The level gage comprises a shell, a piston assembly and a back flushing assembly. The shell comprises a first pipe and a second pipe which are connected, the inner diameter of the first pipe is larger than that of the second pipe, the second pipe is connected to the negative pressure bin, and a limiting switch is arranged in the first pipe. The piston assembly is located in the first pipe and comprises a piston sleeve capable of reciprocating in the axial direction of the shell and tightly attached to the inner wall of the first pipe, and the limiting switch is arranged on the side, away from the negative pressure bin, of the piston sleeve. The reverse blowing assembly comprises an air source control piece and an air blowing pipe which are connected, the air blowing pipe is provided with an air blowing hole located in the second pipe, and the limiting switch is electrically connected with the air source control piece; when the material level of the negative pressure bin rises and the piston sleeve moves to the position of the limiting switch, the air source control piece is controlled to be started to blow air into the second pipe, powder is blown back into the material bin, blocking is avoided, and the accuracy of detection data is improved.

Description

Technical Field

[0001] This application belongs to the technical field of dust removal devices, and particularly relates to a level gauge and a dust collector. Background Art

[0002] With the enlargement of equipment and the increasingly strict requirements for environmental quality, dust removal equipment has become an essential equipment for metallurgy and fine ore processing, and remarkable results have been achieved. The ash hopper arranged at the bottom of the dust collector is used to store the dust captured by the dust collector. After the level gauge detects that the dust is stored to a certain amount, equipment such as pneumatic conveying or scraper conveyor starts to convey the dust to downstream equipment.

[0003] A level gauge refers to an instrument that can detect the change in the height of solid materials in a container in real time. Commonly used level gauges include heavy hammer type level gauges, nuclear radiation type level gauges, rotary vane type level gauges, and ultrasonic level gauges. The heavy hammer type level gauge is prone to the phenomena of hammer jamming and hammer burying. The nuclear radiation type level gauge has a high price, pollution, and is affected by dust. Due to reasons such as the direct contact between the detection element and the material, the rotary vane type level gauge has problems such as poor use stability and short service life. The ultrasonic level gauge is greatly interfered by flue gas dust.

[0004] In the prior art, powder materials are in a silo, and the silo is generally a negative pressure bin. Due to the hygroscopicity of the powder, when the powder material in the silo has dropped to a safe height, the powder material is likely to block the detection hole (the detection head of the rotary vane type level gauge is stuck), and at this time, the level gauge gives a false alarm, resulting in an untrue level. Summary of the Invention

[0005] To solve the technical problem that during the detection of the level of a negative pressure bin by using a level gauge at present, the powder is likely to block the detection hole, resulting in an error in the detected level, this application provides a level gauge and a dust collector.

[0006] In the first aspect of this application, a level gauge is provided, which includes a housing, a piston assembly, and a backflush assembly;

[0007] The housing includes a first pipe and a second pipe connected to each other. The inner diameter of the first pipe is larger than that of the second pipe. The second pipe is detachably connected to the negative pressure bin, and a limit switch is arranged in the first pipe;

[0008] The piston assembly is located in the first pipe and includes a piston sleeve that can reciprocate axially along the housing and closely adheres to the inner wall of the first pipe. The limit switch is arranged on the side of the piston sleeve away from the negative pressure bin;

[0009] The backflush assembly is at least partially located in the second pipe and includes a gas source and a blow pipe connected through a gas source control member. The blow pipe is provided with blow holes located in the second pipe, and the limit switch is electrically connected to the gas source control member.

[0010] In some embodiments, the blowpipe includes a main pipe and a plurality of auxiliary pipes connected to the main pipe, and the plurality of auxiliary pipes are arranged at intervals.

[0011] In some embodiments, the extending direction of the auxiliary pipe is parallel to the axial direction of the housing.

[0012] In some embodiments, the orifice of the auxiliary pipe is close to the negative pressure chamber.

[0013] In some embodiments, the piston assembly includes a spring extending along the axial direction of the housing, which is located in the first pipe and is connected to the inner wall of the first pipe and the piston sleeve.

[0014] In some embodiments, an adjusting assembly is further included. The adjusting assembly is arranged on the side of the first pipe far from the negative pressure chamber. The adjusting assembly includes an adjusting housing, an adjusting piece and a control handle connected to the adjusting piece. The control handle extends out of the adjusting housing. The adjusting piece is threadedly connected to the adjusting housing. The adjusting piece can reciprocate along the axial direction of the housing. One end of the spring abuts against the adjusting piece, and the other end is connected to the piston sleeve.

[0015] In some embodiments, the piston sleeve is connected with a guiding member, and the guiding member is arranged on the side of the piston sleeve far from the negative pressure chamber.

[0016] In some embodiments, the piston sleeve is connected with a sealing ring, and the sealing ring is arranged on the side of the piston sleeve close to the negative pressure chamber.

[0017] In some embodiments, the first pipe and the second pipe are threadedly connected.

[0018] In the second aspect of the present application, a dust collector is provided, which includes a dust collector body and the material level meter;

[0019] The dust collector body is provided with a hopper at the bottom;

[0020] The material level meter is detachably connected to the hopper.

[0021] According to the material level meter provided by the embodiments of the present application, it includes a housing, a piston assembly and a backwashing assembly; the housing includes a first pipe and a second pipe connected to each other. The inner diameter of the first pipe is larger than that of the second pipe. The second pipe is detachably connected to the negative pressure chamber. A limit switch is arranged in the first pipe; the piston assembly is located in the first pipe and includes a piston sleeve that can reciprocate along the axial direction of the housing and closely adheres to the inner wall of the first pipe. The limit switch is arranged on the side of the piston sleeve far from the negative pressure chamber; the backwashing assembly includes a gas source control member and a blowpipe connected to each other. The blowpipe is provided with a blowhole located in the second pipe. The limit switch is electrically connected to the gas source control member;

[0022] Compared with the prior art, when the level gauge of the present application is connected to the negative pressure bin, since the piston sleeve is located in the first pipe and closely adheres to the inner wall of the first pipe, and the inner diameter of the first pipe is larger than that of the second pipe, due to the negative pressure effect of the negative pressure bin, the piston sleeve can be adsorbed on the shoulders of the first pipe and the second pipe. When the material level in the negative pressure bin rises and the negative pressure decreases, the adsorption effect on the piston sleeve is reduced, and the piston sleeve moves in the opposite direction. Since the limit switch is arranged on the side of the piston sleeve away from the negative pressure bin, when the piston sleeve moves to the limit switch and touches the limit switch, the limit switch is electrically connected to the air source control component to control the start of the air source control component. Since the air source control component is connected to the air source and the blow pipe, and the blow pipe is provided with air holes located in the second pipe to blow air into the second pipe to blow the powder back into the bin, it is avoided that when the powder material in the bin has dropped to a safe height, the powder material blocks the detection hole, and the accuracy of the detection data of the level gauge is increased. Description of the Drawings

[0023] Figure 1 Shows a schematic structural view of the level gauge in the embodiment of the present application.

[0024] Figure 2 Shows a schematic structural view of the piston sleeve abutting / away from the limit switch in the embodiment of the present application.

[0025] Description of the Reference Numerals:

[0026] 100, housing;

[0027] 110, first pipe; 120, second pipe;

[0028] 111, adjustment assembly; 112, spring; 113, limit switch;

[0029] 200, piston assembly;

[0030] 210, piston sleeve; 220, guide member; 230, sealing ring;

[0031] 300, backflush assembly;

[0032] 310, air source control component; 320, blow pipe. Detailed Description of the Embodiment

[0033] In order to enable those skilled in the art in the technical field to which the present application belongs to more clearly understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0034] In the first aspect embodiment of the present application, a level gauge is provided to improve the accuracy of level detection.

[0035] Please refer to Figure 1 , the level gauge provided by the embodiment of the present application includes a housing 100, a piston assembly 200 and a backflush assembly 300;

[0036] The housing 100 includes a first pipe 110 and a second pipe 120 connected to each other. The inner diameter of the first pipe 110 is larger than that of the second pipe 120. The second pipe 120 is detachably connected to the negative pressure chamber. A limit switch 113 is provided in the first pipe 110. In some embodiments, the outer diameters of the first pipe 110 and the second pipe 120 are equal, and the inner diameter of the second pipe 120 is smaller than that of the first pipe 110. In some embodiments, the second pipe 120 is provided with a connecting portion and is detachably connected to the negative pressure chamber. In some embodiments, the second pipe 120 is bolted to the negative pressure chamber;

[0037] Please refer to Figure 2 , the piston assembly 200 is located in the first pipe 110 and includes a piston sleeve 210 that can reciprocate axially along the housing 100 and closely adheres to the inner wall of the first pipe 110. The limit switch 113 is provided on the side of the piston sleeve 210 away from the negative pressure chamber so that the piston sleeve 210 can touch the limit switch 113 when it moves. In some embodiments, the limit switch 113 is located at the top of the inner wall of the first pipe 110. In some embodiments, the limit switch 113 is located on the left side of the piston sleeve 210. In some embodiments, the limit switch 113 is far from the second pipe 120. In some embodiments, the piston sleeve 210 is a disc and has a diameter consistent with the inner diameter of the first pipe 110;

[0038] The backflush assembly 300 includes a gas source and a blow pipe 320 connected through a gas source control member 310. The blow pipe 320 is provided with blow holes located in the second pipe 120. The limit switch 113 is electrically connected to the gas source control member 310; In some embodiments, at least part of the backflush assembly 300 is located in the second pipe 120. In some embodiments, part of the blow pipe 320 is located in the second pipe 120, and the gas source and the gas source control member 310 are located outside the second pipe 120.

[0039] In some embodiments, the blow pipe 320 includes a main pipe and a plurality of sub-pipes connected to the main pipe. The plurality of sub-pipes are arranged at intervals to blow air evenly. In some embodiments, the plurality of sub-pipes are arranged at intervals in the radial direction of the housing 100. In some embodiments, the plurality of sub-pipes are arranged at equal intervals in the radial direction of the housing 100; In some embodiments, there are three sub-pipes. In some embodiments, each sub-pipe is provided with a plurality of nozzles. In some embodiments, each sub-pipe is provided with three nozzles.

[0040] In some embodiments, the extending direction of the auxiliary pipe is parallel to the axial direction of the housing 100, so that the blowing direction is consistent with the axial direction of the housing 100, increasing the blowing effect. In some embodiments, the auxiliary pipe is parallel to the axial direction of the housing 100. In some embodiments, the auxiliary pipe is perpendicular to the radial direction of the housing 100.

[0041] In some embodiments, the pipe orifice of the auxiliary pipe is close to the negative pressure chamber, further increasing the effect of blowing the powdery material. In some embodiments, the pipe orifice of the auxiliary pipe is far from the first pipe 110. In some embodiments, the pipe orifice of the auxiliary pipe is far from the piston sleeve 210.

[0042] In some embodiments, the piston assembly 200 includes a spring 112 extending along the axial direction of the housing 100, located inside the first pipe 110, and connected to the pipe wall of the first pipe 110 and the piston sleeve 210 to assist the movement of the piston sleeve 210. In some embodiments, the spring 112 is perpendicular to the radial direction of the housing 100.

[0043] In some embodiments, an adjusting assembly 111 is further included. The adjusting assembly 111 is arranged on the side of the first pipe 110 far from the negative pressure chamber. The adjusting assembly 111 includes an adjusting housing, an adjusting piece, and a control handle connected to the adjusting piece. The adjusting piece is threadedly connected to the adjusting housing, and the control handle extends out of the adjusting housing. The adjusting piece can reciprocally move along the axial direction of the housing 100. One end of the spring 112 abuts against the adjusting piece, and the other end is connected to the piston sleeve 210 to adjust the stiffness of the spring 112 to adapt to different negative pressure states. In some embodiments, the adjusting assembly 111 is arranged at the end of the first pipe 110. In some embodiments, the adjusting housing of the adjusting assembly 111 is sleeved outside the adjusting piece and is threadedly connected to the adjusting piece. The bottom of the adjusting piece abuts against the spring 112, and the top is connected to the control handle. The rotation of the control handle drives the adjusting piece to reciprocally move along the axial direction of the adjusting housing to adjust the expansion and contraction of the abutting spring 112.

[0044] In some embodiments, the piston sleeve 210 is connected with a guiding member 220. The guiding member 220 is arranged on the side of the piston sleeve 210 far from the negative pressure chamber to guide the piston sleeve 210. In some embodiments, the guiding member 220 is a disc, and the guiding member 220 is connected to the spring 112. In some embodiments, the diameter of the guiding member 220 is the same as the inner diameter of the first pipe 110.

[0045] In some embodiments, the piston sleeve 210 is connected with a sealing ring 230. The sealing ring 230 is arranged on the side of the piston sleeve 210 close to the negative pressure chamber to prevent dust from entering the first pipe 110 and increase the accuracy of the detection data of the level gauge. In some embodiments, one end of the piston sleeve 210 is connected to the guiding member 220, and the other end is connected to the sealing ring 230. In some embodiments, the sealing ring 230 is far from the spring 112.

[0046] In some embodiments, the first pipe 110 and the second pipe 120 are threadedly connected to increase the connection stability.

[0047] In a second aspect embodiment of the present application, a dust collector is provided to increase the accuracy of material level detection.

[0048] The dust collector provided by the embodiments of the present application includes a dust collector body and a material level gauge; in some embodiments, the bottom of the dust collector body is provided with a hopper; in some embodiments, the material level gauge is detachably connected to the hopper.

[0049] The following will detail the process of the material level gauge and the dust collector of the present application:

[0050] During use, the second pipe 120 is bolted to the dust collector hopper. Since the piston sleeve 210 is located inside the first pipe 110 and is in close contact with the inner wall of the first pipe 110, and the inner diameter of the first pipe 110 is larger than that of the second pipe 120, due to the negative pressure in the negative pressure chamber, the piston sleeve 210 can be adsorbed on the shoulder between the first pipe 110 and the second pipe 120. When the material level in the negative pressure chamber rises and the negative pressure decreases, the adsorption effect on the piston sleeve 210 is reduced, and the piston sleeve 210 moves in the opposite direction. Since the limit switch 113 is provided on the side of the piston sleeve 210 away from the negative pressure chamber, when the piston sleeve 210 moves to the limit switch 113 and touches the limit switch 113, the limit switch 113 is electrically connected to the air source control member 310 to control the start of the air source control member 310. Since the air source control member 310 is connected to the air source and the blow pipe 320, and the blow pipe 320 is provided with blow holes located inside the second pipe 120 to blow air into the second pipe 120 to blow the powder back into the silo.

[0051] The material level gauge and the dust collector of the present application have at least the following advantages:

[0052] (1) When the material level gauge of the present application is connected to the negative pressure chamber, since the piston sleeve is located inside the first pipe and is in close contact with the inner wall of the first pipe, and the inner diameter of the first pipe is larger than that of the second pipe, due to the negative pressure in the negative pressure chamber, the piston sleeve can be adsorbed on the shoulder between the first pipe and the second pipe. When the material level in the negative pressure chamber rises and the negative pressure decreases, the adsorption effect on the piston sleeve is reduced, and the piston sleeve moves in the opposite direction. Since the limit switch is provided on the side of the piston sleeve away from the negative pressure chamber, when the piston sleeve moves to the limit switch and touches the limit switch, the limit switch is electrically connected to the air source control member to control the start of the air source control member. Since the air source control member is connected to the air source and the blow pipe, and the blow pipe is provided with blow holes located inside the second pipe to blow air into the second pipe to blow the powder back into the silo, it can prevent the powder from blocking the detection hole when the powder material in the silo has dropped to a safe height, thereby increasing the accuracy of the detection data of the material level gauge.

[0053] (2) The piston sleeve of the present application is connected with a sealing ring, and the sealing ring is provided on the side of the piston sleeve close to the negative pressure chamber to prevent dust from entering the first pipe, thereby increasing the accuracy of the detection data of the material level gauge.

[0054] (3) The adjustment component of the present application is disposed on the side of the first tube away from the negative pressure chamber. The adjustment component includes an adjustment housing, an adjustment piece, and a control handle connected to the adjustment piece. The adjustment piece is threadedly connected to the adjustment housing. The control handle extends out of the adjustment housing. The adjustment piece can reciprocate along the axial direction of the housing. One end of the spring abuts against the adjustment piece, and the other end is connected to the piston sleeve to adjust the stiffness of the spring to adapt to different negative pressure states.

[0055] In the present application, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0056] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0057] In the present application, unless otherwise clearly defined and limited, the terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0058] In addition, in the present application, descriptions such as "first", "second", etc. are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first", "second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise clearly specifically defined.

[0059] Although embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the claims and their equivalents.

Claims

1. A material level meter for monitoring the material level in a negative pressure bin, characterized in that: include: The housing comprises a first tube and a second tube connected to each other, the inner diameter of the first tube is larger than the inner diameter of the second tube, the second tube is detachably connected to the negative pressure chamber, and a limit switch is arranged in the first tube; A piston assembly is located in the first tube, comprising a piston sleeve that can reciprocate along the axial direction of the shell and is in close contact with the inner wall of the first tube, and the limit switch is arranged on a side of the piston sleeve away from the negative pressure chamber; The back-blowing assembly comprises an air source and an air blowing pipe which are connected through an air source control component. The air blowing pipe is provided with an air blowing hole located in the second tube. The limit switch is electrically connected to the air source control component.

2. The material level meter according to claim 1, characterized in that: The air blowing pipe comprises a main pipe and a plurality of sub-pipes connected to the main pipe, and the plurality of sub-pipes are arranged at intervals.

3. The material level meter according to claim 2, characterized in that: The extension direction of the sub-tube is parallel to the axial direction of the housing.

4. The material level meter according to claim 2, characterized in that: The pipe opening of the auxiliary pipe is close to the negative pressure chamber.

5. The material level meter according to any one of claims 1 to 4, characterized in that: The piston assembly includes a spring extending axially along the housing, located in the first tube, and connected to the wall of the first tube and the piston sleeve.

6. The material level meter according to claim 5, characterized in that: It also includes an adjustment component, which is arranged in the first tube on a side away from the negative pressure chamber. The adjustment component includes an adjustment shell, an adjustment plate and a control handle connected to the adjustment plate. The adjustment plate is threadedly connected to the adjustment shell, and the control handle extends out of the adjustment shell. The adjustment plate can move back and forth along the axial direction of the shell. One end of the spring abuts against the adjustment plate, and the other end is connected to the piston sleeve.

7. The material level meter according to any one of claims 1 to 4, characterized in that: The piston sleeve is connected with a guide member, and the guide member is arranged on a side of the piston sleeve away from the negative pressure chamber.

8. The material level meter according to any one of claims 1 to 4, characterized in that: The piston sleeve is connected with a sealing ring, and the sealing ring is arranged on a side of the piston sleeve close to the negative pressure chamber.

9. The material level meter according to any one of claims 1 to 4, characterized in that: The first pipe and the second pipe are threadedly connected.

10. A dust collector, characterized in that: It includes a dust collector body, and a dust hopper is provided at the bottom; The material level meter according to any one of claims 1 to 9 is detachably connected to the ash hopper.

Images