A new type of steel plate shot blasting machine shot dust discharging device

Abstract

The utility model discloses the technical field of shot -blasting machine especially a new -type steel plate shot -blasting machine shot -blasting device of grey, including the upper cylinder and lower cylinder of mutual connection, the upper cylinder is connected with the shot -blasting machine shot -blasting grey pipe, and the lower cylinder is connected with shot -blasting grey box, and the bottom inner edge of upper cylinder is equipped with the limit ring in the circumference, and the upper part of lower cylinder is equipped with the rotating shaft seat near the limit ring, and the rotating shaft seat is built -in rotating shaft, and is installed with the balance pole on this rotating shaft, and is set up with the axle hole of the sleeve of rotating shaft on the balance pole, and the balance pole rotates with rotating shaft as fulcrum, one end of balance pole is equipped with the valve plate, and the valve plate is located in the lower cylinder, and the other end of balance pole is equipped with the counterweight, and the valve plate covers in the limit ring under the action of counterweight. In the utility model, when shot -blasting grey reaches certain weight, opens, and the valve plate resets rapidly after shot -blasting grey discharges, guarantees the negative pressure time in shot -blasting machine, and prevents shot -blasting grey from spilling over and influences environmental protection.

Description

Technical Field

[0001] This invention relates to the field of shot blasting machine technology, and in particular to a novel shot blasting machine dust discharge device for steel plates. Background Technology

[0002] Shot blasting is a pre-treatment process for steel plates. Steel shot is fired at a speed of 90 m / s onto the upper and lower surfaces of the steel plate to remove iron oxide. The steel shot is made of low-carbon cast shot (390), with a diameter of 1.2 mm and a hardness of 46-52 HRC. The shot blasting machine contains 18 tons of shot, which is circulated using spiral and elevator equipment. The resulting shot dust is separated layer by layer by a dust removal device. Negative pressure inside the shot blasting machine is maintained to prevent dust from overflowing during operation.

[0003] Conventional shot blasting ash removal devices use rubber valve plates. The soft texture makes it difficult to maintain a stable negative pressure inside the shot blasting machine, causing shot ash to overflow and affecting the environment. Rubber materials are also prone to wear and damage, causing shot ash to fall continuously and rub excessively against the cylinder, shortening the cylinder's service life. Therefore, it is very necessary to design and manufacture a counterweight adjustable ash removal device. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the negative pressure inside the shot blasting machine cannot be maintained for a long time when discharging shot ash in the existing technology, and to propose a new type of shot ash discharge device for steel plate shot blasting machines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel shot blasting machine shot ash discharge device includes an upper cylinder and a lower cylinder connected to each other. The upper cylinder is connected to the shot ash pipe of the shot blasting machine, and the lower cylinder is connected to the shot ash box. A limiting ring is provided circumferentially on the bottom inner edge of the upper cylinder, and a rotating shaft seat is provided on the upper part of the lower cylinder near the limiting ring.

[0007] The rotating shaft seat has a built-in rotating shaft with a balance bar installed on it. The balance bar has a shaft hole that fits into the rotating shaft. The balance bar is perpendicular to the rotating shaft and rotates around the rotating shaft as a fulcrum.

[0008] A valve plate is provided at one end of the balance bar, which is located in the lower cylinder. A counterweight is provided at the other end of the balance bar, and the valve plate covers the limiting ring under the action of the counterweight.

[0009] As a further preferred option, the counterweight includes a threaded rod and a threaded cylinder, with locking nuts provided on the threaded rod at both ends of the threaded cylinder. The threaded cylinder can be positioned at any position on the threaded rod to change the lever arm length.

[0010] As a further preferred option, a flexible material is provided around the edge of the valve plate, and the flexible material is attached to the lower surface of the limiting ring.

[0011] As a further preferred option, the flexible material is felt.

[0012] As a further preferred option, the upper part of the limiting ring is provided with an annular constriction structure, the upper edge of which is connected to the inner wall of the upper cylinder, and the lower edge is connected to the inner edge of the limiting ring.

[0013] This invention features a simple structure. Compared to traditional shot blasting ash discharge devices, after adjusting the counterweight, once the shot blasting ash reaches a certain weight, the valve plate tilts to discharge the ash when the weight of the valve plate and the shot blasting ash exceeds the counterweight. After tilting, when the weight is less than the counterweight, the valve plate resets and seals the ash inlet. This not only ensures the stability and durability of the negative pressure inside the shot blasting machine but also reduces the frequency of shot blasting ash scouring the cylinder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] This utility model discloses a novel shot blasting machine shot ash discharge device, comprising an upper cylinder 1 and a lower cylinder 2 connected to each other. The upper cylinder 1 is connected to the shot ash pipe of the shot blasting machine, and the lower cylinder 2 is connected to the shot ash box. A limiting ring 3 is provided circumferentially on the bottom inner edge of the upper cylinder 1, and a rotating shaft seat 4 is provided on the upper part of the lower cylinder 2 near the limiting ring 3.

[0017] The rotating shaft seat 4 has a built-in rotating shaft 5, on which a balance bar 6 is installed. The balance bar 6 has a shaft hole that fits into the rotating shaft 5. The balance bar 6 is perpendicular to the rotating shaft 5 and rotates around the rotating shaft 5 as a fulcrum.

[0018] One end of the balance bar 6 is provided with a valve plate 7, which is located in the lower cylinder 2. The other end of the balance bar 6 is provided with a counterweight 8, forming a structure with the rotating shaft 5 as the fulcrum. The balance bar 6 realizes the structure of the two lever arms. Under the action of the counterweight, the valve plate 7 covers the limiting ring 3.

[0019] Initially, the weight of counterweight 8, considering the combined lever arm length on this side, is slightly greater than that of valve plate 7. Therefore, in this state, valve plate 7 is closed to limiting ring 3, maintaining a certain force on limiting ring 3. When the shot blasting machine is working, shot dust begins to appear and diffuse inside the equipment, gradually entering the shot dust pipe of the shot blasting machine and reaching valve plate 7. At this time, because limiting ring 3 occupies a ring area around valve plate 7, shot dust is concentrated in the central area of ​​valve plate 7. As valve plate 7 accumulates a certain amount of weight... After the amount of shot ash is added, the weight of the valve plate 7 gradually becomes greater than that of the counterweight 8 side, causing the valve plate 7 to tilt. The area of ​​the valve plate 7 in contact with the limiting ring 3 in the circumference opens. As the valve plate 7 initially tilts, the accumulated shot ash rolls to the edge of the tilted valve plate 7, increasing the lever arm of the balance bar 6 on the side of the valve plate 7 and increasing the weight, thus achieving a sudden and significant tilt of the valve plate 7 and realizing the tilting action. After tilting, the weight on the side of the valve plate 7 disappears, and it immediately resets. The valve plate 7 then re-closes onto the limiting ring 3, waiting for the next round of tilting work.

[0020] Furthermore, the counterweight 8 includes a threaded rod 81 and a threaded cylinder 82. Locking nuts 83 are also provided on the threaded rod 81 at both ends of the threaded cylinder 82. The position of the threaded cylinder 82 can be adjusted on the threaded rod 81 to change the lever arm length, realize different gravity thresholds on the side of the valve plate 7, adjust the weight required for tilting the valve plate 7, and adjust the tilting frequency of the valve plate 7.

[0021] To improve the sealing between the valve plate 7 and the limiting ring 3, thus ensuring a good negative pressure environment inside the equipment, a flexible material is provided around the edge of the valve plate 7, which fits against the lower surface of the limiting ring 3. The flexible material can be rubber, but is preferably a more durable felt material.

[0022] Since the contact surface of the limiting ring 3 in the circumferential area of ​​the valve plate 7 is large, shot dust may accumulate above the limiting ring 3. Therefore, a guide structure is provided on the upper part of the limiting ring 3 to prevent shot dust from accumulating on the limiting ring 3, so that the shot dust can fall effectively. An annular closing structure 8 is provided on the upper part of the limiting ring 3. The upper edge of the annular closing structure 8 is connected to the inner wall of the upper cylinder 1, and the lower edge is connected to the inner ring edge of the limiting ring 3.

[0023] The lower cylinder 2 flows into the shot ash box through a hose. The shot ash adopts a centralized discharge mode, which reduces the wear on the lower cylinder 2 and the hose.

[0024] The valve plate 7 of this utility model tilts quickly, and the opening and resetting are completed in a short time. This can ensure that the negative pressure working conditions inside the equipment are maintained for a long period of time, and also avoid the continuous falling of shot dust, which would cause wear on the pipeline.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A novel shot blasting machine dust discharge device, characterized in that: It includes an upper cylinder (1) and a lower cylinder (2) that are connected to each other. The upper cylinder (1) is connected to the shot ash pipe of the shot blasting machine, and the lower cylinder (2) is connected to the shot ash box. A limiting ring (3) is provided around the bottom inner edge of the upper cylinder (1), and a rotating shaft seat (4) is provided at the upper part of the lower cylinder (2) near the limiting ring (3). The rotating shaft seat (4) has a built-in rotating shaft (5), on which a balance bar (6) is installed. The balance bar (6) has a shaft hole that fits onto the rotating shaft (5). The balance bar (6) is perpendicular to the rotating shaft (5), and the balance bar (6) rotates around the rotating shaft (5) as a fulcrum. One end of the balance bar (6) is provided with a valve plate (7), which is located in the lower cylinder (2). The other end of the balance bar (6) is provided with a counterweight (8), and the valve plate (7) covers the limiting ring (3) under the action of the counterweight.

2. The novel shot blasting machine dust discharge device according to claim 1, characterized in that: The counterweight (8) includes a threaded rod (81) and a threaded cylinder (82). Locking nuts (83) are also provided on the threaded rod (81) at both ends of the threaded cylinder (82). The threaded cylinder (82) can be positioned at any position on the threaded rod (81) to change the lever arm length.

3. The novel shot blasting machine dust discharge device according to claim 1, characterized in that: The valve plate (7) has a flexible material around its edge, and the flexible material is attached to the lower surface of the limiting ring (3).

4. A novel shot blasting machine dust discharge device according to claim 3, characterized in that: The flexible material is felt.

5. A novel shot blasting machine dust discharge device according to claim 1, characterized in that: The upper part of the limiting ring (3) is provided with an annular closing structure. The upper edge of the annular closing structure is connected to the inner wall of the upper cylinder (1), and the lower edge is connected to the inner ring edge of the limiting ring (3).

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