Dust remover of shot blasting machine

Abstract

The invention discloses a shot blasting machine dust remover, and relates to the technical field of shot blasting dust removal, the shot blasting machine dust remover comprises a first chamber, one side of the first chamber is provided with an air inlet connected with an exhaust port of a shot blasting machine, the other side, opposite to the air inlet, of the first chamber is provided with a plurality of outlets, and the top in the first chamber is provided with a bracket facing the outlets; pull rods are rotatably connected to the lower edge of the bracket at intervals in the length direction of the bracket, connecting rods rotatably connected with the pull rods on the bracket are arranged below the bracket, the connecting rods are parallel to the bracket above the connecting rods, and the connecting rods enable the pull rods to act synchronously. According to the dust remover of the shot blasting machine, the structures such as the pull rod and the protruding part which are connected through the connecting rod are arranged, the handle is simply swung back and forth, and the filter cylinder can move back and forth, so that the dust remover is convenient to mount and dismount, and the filter cylinder can be moved out from the side edge without occupying the height space.

Description

Technical Field

[0001] This invention relates to the field of shot blasting dust removal technology, specifically a dust collector for shot blasting machines. Background Technology

[0002] When shot blasting a workpiece, the steel shot directly impacts the surface, generating a large amount of dust-laden gas, including debris and other impurities that detach from the workpiece surface. This dust-laden gas cannot be directly discharged and must be treated before being released.

[0003] Currently, most dust collectors used in shot blasting machines are cartridge-type structures, which rely on the cartridges to filter dust-laden gas, thereby achieving gas purification. However, the cartridges are prone to clogging after long-term use, leading to reduced dust removal efficiency, thus requiring regular cleaning or replacement. Based on the different arrangement of the cartridges, existing shot blasting machine cartridge dust collectors can be mainly divided into two categories: direct-insertion type and non-direct-insertion type. Direct-insertion type cartridges have their axis arranged vertically upwards, resulting in a more compact overall structure and smaller footprint compared to non-direct-insertion type cartridges, but they are taller. In comparison, disassembling direct-insertion type cartridges is more complex during replacement, usually requiring upward or horizontal extraction. Since upward lifting requires significant installation space, horizontal extraction is currently the most common method. However, in this method, the cartridges are arranged side-by-side, requiring individual removal, with the inner cartridges being particularly difficult to remove, making the operation inconvenient. Therefore, we propose a new dust collector for shot blasting machines. Summary of the Invention

[0004] The purpose of this invention is to provide a dust collector for shot blasting machines to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dust collector for a shot blasting machine, comprising a first chamber, an air inlet connected to the exhaust port of the shot blasting machine on one side of the first chamber, and several outlets on the other side of the first chamber opposite to the air inlet. A bracket facing the outlet is provided at the top of the first chamber, and two adjacent brackets form a mounting for a filter cartridge. A pull rod is rotatably connected to the lower edge of the bracket along its length. A connecting rod is provided below the bracket and rotatably connected to the pull rod on the bracket. The connecting rod is parallel to the bracket above it, and the connecting rod synchronizes the movement of each pull rod. The bottom of the pull rod located on the outlet side of the bracket extends downward to form a handle, and a protrusion is provided at the top of the pull rod. An external force is applied to the handle, causing the protrusion on the pull rod to continuously push up the end of the filter cartridge. The position of the filter cartridge changes as the protrusion rotates with the pull rod, pushing or pushing the filter cartridge along the length of the bracket. An air outlet is provided on the first chamber, and the air outlet communicates with the space above the filter cartridge inside the first chamber.

[0006] Preferably, the protrusion consists of two push rods. The push rods are rotatably connected to the pull rod at the rotatable connection between the pull rod and the bracket. An elastic element is provided between the push rods or the pull rod, and a limiting block is provided at the top of the pull rod to limit the maximum angle of rotation between the two push rods. When an external force is applied to the pull rod by the handle, the push rod on the side with the same direction of force pushes up the filter cylinder. As the pull rod continues to move, the other push rod disengages from the filter cylinder and moves to the position between the two push rods under the action of the elastic element and contacts the filter cylinder again, moving in the opposite direction with the pull rod.

[0007] Preferably, the rotating connection surface between the push rod and the pull rod is provided with a resistance surface with a bidirectional friction coefficient. The resistance surface applies pressure to the push rod when the single push rod does not support the filter cylinder due to the action of the limiting block.

[0008] Preferably, the upper end of the push rod is a downward-curving arc shape, and the distance to the center of the rotation axis between the push rod and the pull rod increases as the arc surface extends outward.

[0009] Preferably, the top side wall of the pull rod has a groove adapted to the top rod, the groove is less than 0.mm deep, and the edge is chamfered into a bevel, and a shoulder is provided at the top of the bevel transition, and a layer of bristles is provided on the side wall of the top rod.

[0010] Preferably, the top sidewall of the pull rod is provided with a guide groove extending toward the handle end, and the upper sidewall of the top rod is inclined downward or outward in the same direction.

[0011] Preferably, a second chamber is provided on one side of the first chamber, and the air inlet is located on the side wall of the second chamber that is relatively far away from the first chamber. A channel is provided between the first chamber and the second chamber, and the horizontal height of the channel is lower than that of the air inlet.

[0012] Preferably, a baffle plate facing the air inlet is provided at the upper edge of the channel in the second chamber. The baffle plate blocks and collides the particles in the dust-laden gas, causing them to fall into the collector below.

[0013] Compared with the prior art, the beneficial effects of the present invention are: This invention, by setting up a connecting rod and a protruding part, allows the filter cartridge to move back and forth simply by shaking the handle, thus facilitating installation and disassembly and allowing the filter cartridge to be moved out from the side without occupying height space. The protrusion on the pull rod of the present invention is provided as two top rods and restrained by elastic elements, so that when the filter cartridge is pushed to move, it will not produce a vertical falling sensation and impact, thereby avoiding the generation of dust during operation, which would affect the health of the operator and the external workshop environment. The two push rods of this invention cooperate with the resistance surface, enabling the filter cartridge to move forward in both directions, thereby improving the efficiency of moving the filter cartridge when shaking the handle; The invention incorporates a second chamber and a baffle plate, which can effectively divert larger diameter dust particles in advance, thereby avoiding impact on the filter cartridge and extending its service life. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 for Figure 2 A front view of the cross section; Figure 4 This is a schematic diagram showing the structure of the filter cartridge. Figure 5 A schematic diagram of the overall structure of the tie rod, connecting rod, and protrusion; Figure 6 This is a schematic diagram showing the movement of the protruding part; Figure 7 This is a schematic diagram showing the structure between the push rod and the tie rod. Figure 8 This is a schematic diagram showing the rotational rise angle of a straight push rod; Figure 9 This is a schematic diagram of the rotational ascent angle of the curved push rod.

[0015] In the diagram: 1-First chamber 1; 2-Air inlet; 3-Outlet; 4-Bracket; 5-Pull rod; 6-Connecting rod; 7-Handle; 8-Protrusion; 9-Air outlet; 10-Resistance surface; 11-Second chamber; 12-Channel; 13-Slide plate; 14-Cover plate; 15-Venturi tube; 16-Break plate; 51-Limiting block; 52-Groove; 53-Outlet groove; 81-Push rod; 82-Elastic element. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This invention provides a technical solution: a dust collector for a shot blasting machine, comprising a first chamber 1, the first chamber 1 being frame-shaped with an inverted conical discharge port at its bottom, the discharge port being connected to a particle collection device, the upper half of the first chamber 1 containing several filter cartridges arranged longitudinally and transversely, a venturi tube 15, a sliding plate 13, and a cover plate 14 above the filter cartridges, the cover plate 14 having circular holes corresponding to the filter cartridges, the cover plate 14 dividing the first chamber 1 into upper and lower parts, the upper part being a cleaned airflow channel and communicating with an air outlet 9 to exhaust air outwards, the first chamber 1 also having a pipe opening communicating with an air storage structure, the air storage structure being pulsed once every few seconds by a pulser, the pulsed airflow passing through the venturi tube 15 causing the filter cartridges to vibrate and shake off the dust on the surface of the filter cartridges.

[0018] An outlet 3 is opened on one side wall along the width direction of the first chamber 1, and an observation window is installed. Inside the first chamber 1, facing the outlet 3, a bracket 4 is located between adjacent filter cartridges. The ends of the filter cartridges are connected to a sliding plate 13. The sliding plate 13 can slide along the extension direction of the bracket 4 and rest on the bracket 4. The filter cartridges form a row on the bracket 4, and each row can be individually pulled out from the bracket 4 for easy disassembly without lifting. The cross-sections of two adjacent brackets 4 constituting the filter cartridge mounting are L-shaped, holding the sliding plate 13. A connecting plate extends downward from the bottom of the bracket 4. A pull rod 5 is included, but is not limited to, a shaft connected to the connecting plate, or a ball joint or... The pull rods 5 are evenly spaced on the connecting plate and connected at their lower ends by a connecting rod 6 using a shaft connection or hinge connection, so that the pull rods 5 under the same bracket 4 can move synchronously. The pull rod 5 at the end of the bracket 4 located on the outlet 3 side extends downward to form a handle 7, and the pull rod 5 extending out of the handle 7 is preferably the outermost one, so that the operator can better access and operate it. A protrusion 8 is provided at the upper end of the pull rod 5. When the pull rod 5 swings around the axis, the protrusion 8 pushes the slide plate 13 inward or outward (here, the outlet 3 side is the outer side, and the opposite side is the inner side).

[0019] Specifically, with Figure 5 Taking the perspective of pushing out the filter cartridge as an example, we will explain the above process. Figure 5 From the perspective of pushing the skateboard 13 to the right, that is, the operator first pushes the handle 7 to the left. It should be noted that the protrusion 8 in the initial state has three states, distinguished by the axis of the connection between the pull rod 5 and the connecting plate under the bracket 4: located to the left of the axis, on the axis, and to the right of the axis. Figure 5When the filter cartridge is directly above the axis and on the left side, push the handle 7 directly. The protrusion 8 will lift the slide plate 13 and push it to the right at the same time. During the pushing process, the protrusion 8 will not cross the axis. After lifting, quickly pull the handle 7 in the opposite direction. The protrusion 8 will move quickly to the left and descend, while the slide plate 13 will fall directly. Repeat this process. The small range of movement of the slide plate 13 forms a continuous outward movement, so that the filter cartridges can be taken out one by one. The second and third methods are similar. In this case, the handle 7 needs to be pulled outward first (the inner end of the bracket 4 limits the filter cartridge to prevent it from moving inward) until the protrusion 8 is on the left side of the axis. Then, operate according to the first method. The process of installing the filter cartridge inward is similar to the process of removing the filter cartridge, only in the opposite direction. As a preferred solution, at least two protrusions 8 should be covered under one slide plate 13 at the same time.

[0020] See Figure 6 , Figure 7 During the operation of the handle 7, the protrusion 8 mentioned above needs to be quickly lowered during the return stroke. This drop will cause the filter cartridge to vibrate, which will raise dust. Since the outlet 3 is open during operation, the dust will overflow and affect the operator or the external workshop environment. To avoid abruptness and vibration during the drop, the protrusion 8 is set as two push rods 81. The two push rods 81 are located on both sides with the axis connecting the pull rod 5 and the bracket 4 as the boundary. An elastic element 82 is set between the two push rods 81 or between the push rod 81 and the pull rod 5. A limiting block 51 is set on the pull rod 5. The included angle between the projections of the two limiting blocks 51 on the side of the pull rod 5 is greater than the included angle between the two pull rods 5 in the natural state.

[0021] In one specific embodiment, one end of the push rod 81 extends upward to form a support portion, and the other end is provided with a rotatable mounting structure, such as a ring, and a convex ring is provided on the side surface of the pull rod 5 for adaptation. A connecting portion for connecting the end of the elastic element 82 (linear spring) is provided on one side of the support portion of the push rod 81. The two connecting portions face each other and are respectively connected to the two ends of the spring. The end of the support portion of the push rod 81 is arc-shaped.

[0022] Specifically, with Figure 6 Taking the perspective of [the filter element] as an example for analysis, in the initial state, the sliding plate 13 on the filter cartridge presses down the two push rods 81, causing the elastic element 82 to be in a stretched or torsional state, depending on whether a linear spring or a torsion spring is used, or other alternatives. That is, it is in an elastic stretched or compressed state rather than a natural state. Figure 6 As shown in Figure B1, pulling lever 5 to the right keeps push rod 81 stationary within a small range. As rotation continues, Figure 6The right-side push rod 81 of B1 contacts the limiting block 51, causing it to rotate counterclockwise. At this time, the right-side push rod 81 in B1 is mainly under force, while the other push rod 81 rotates clockwise under the action of the elastic element 82. The right-side push rod 81 in B1 continues to rotate, lifting and moving the slide plate 13 to the upper left. In this state, the left-side push rod 81 in B1 may or may not be in contact with the lower surface of the slide plate 13, but it is not under force. Then, the pull rod 5 is rotated in the opposite direction, thus achieving... Figure 6 In state B2, both push rods 81 re-contact the lower surface of the slide plate 13 and are subjected to force, because the limit block 51 is in... Figure 6 When the middle pull rod 5 rotates clockwise, it does not actually form a limit, so it returns to state B1. However, because the two pull rods 5 move apart, that is, during the clockwise rotation of the pull rod 5 (the clockwise rotation does not exceed the left top rod 81 in B2 contacting the limit block 51 to avoid pushing the slide plate 13 back), the slide plate 13 is in a stationary state, thus continuously moving to the left during the reciprocating process. The reverse movement is the opposite of the above process. Unlike the overall design of the protrusion 8, one or both of the two top rods 81 are always under force, and when moving downward, there is an elastic element 82 to buffer the process, avoiding rapid falling and impact, which can effectively prevent dust from being raised due to vibration.

[0023] Furthermore, a limiting mechanism is provided under the bracket 4 to limit the maximum rotation angle of the pull rod 5 in one direction. For example, a pin and a fixed hole are used to cooperate so that the angle can be deliberately controlled when the pull rod 5 does not need to be pushed.

[0024] See Figure 6 At the axial connection between the push rod 81 and the pull rod 5, when the two rotate, a resistance surface 10 is provided on the relatively contacting sliding surface. The resistance surface 10 has different friction coefficients in both directions. That is, when the two rotate relative to each other, the friction coefficients are different in a clockwise and counterclockwise state (or a stationary state) and in the completely opposite state. The push rod 81, which is supported by the sliding plate 13 independently without the limit block 51, forms a limit. The resistance is smaller when moving in the opposite direction.

[0025] Specifically, still based on Figure 6 The states shown are described below. In the initial state, it is still... Figure 6In state B1, when the pull rod 5 is rotated counterclockwise, the motion of the two push rods 81 in B1 is consistent with the aforementioned state. In state B2, the right push rod 81 is supported by the limit block 51 and pushes the slide plate 13 to the left. The left push rod 81 returns to the right under the action of the elastic element 82. When the pull rod 5 in B2 rotates clockwise, since neither push rod 81 is supported by the limit block 51, it should have been in state B1, i.e., the two push rods 81 would move apart under the gravity of the slide plate 13 and the filter cartridge. However, in state B2, when the pull rod 5 rotates clockwise, the resistance surface 10 of the left push rod 81 generates a large frictional resistance (the pull rod 5 is relatively to both push rods 81). (For clockwise rotation), this results in a greater normal pressure on the static friction between the left push rod 81 and the slide plate 13. The right push rod 81 slides relative to the slide plate 13, and while the slide plate 13 moves downward under gravity, it also moves to the left under the support of the left push rod 81. Unlike the state without the resistance surface 10, the left and right positions of the slide plate 13 do not change during the return stroke. With the resistance surface 10, the slide plate 13 can also be pushed during the return stroke, making the movement efficiency of the filter cartridge higher. Similarly, during the return stroke, the left push rod 81 in B2 is limited to the slide plate 13 falling to the lowest position when it just contacts the limit block 51, and then it repeats. The reverse movement process of the filter cartridge is the same, only the operation and direction are reversed.

[0026] Furthermore, a limiting mechanism is provided under the bracket 4 to limit the maximum rotation angle of the pull rod 5 in one direction. For example, a pin and a fixed hole are used to cooperate so that the angle can be deliberately controlled when the pull rod 5 does not need to be pushed.

[0027] The resistance surface 10 can be a partial contact surface or a complete contact surface.

[0028] See Figure 6 , Figure 8 and Figure 9 The straight rod type push rod 81 causes the filter cartridge to rise to a greater height during its rotation. Since the filter cartridge's primary effective forward direction is left to right, the smaller the difference in positional change between the upper and lower sides, the better. Figure 8 As shown, when the push rod 81 rotates counterclockwise, its height increases with each unit angle α of rotation. The effective contact surface between the upper end of the push rod 81 and the sliding plate 13 is set in an arc shape. During rotation, the vertical height caused by the lifting action decreases. From the axis of rotation outwards, the actual straight-line distance from the surface of the push rod 81 to the axis increases, thus preventing reverse concavity that could affect the sliding of the end of the push rod 81. Figure 9 The height difference before and after the rotation is less than Figure 8 The height difference before and after the rotation is shown.

[0029] See Figure 7The pull rod 5 contacts and slides relative to the top rod 81 on the side wall. When not in use, it is in a close-fitting state. The whole is located outside the filter cartridge, i.e., inside the first chamber 1, in a dusty gas environment. Therefore, dust is prone to adhere, especially at the corner formed by the side wall of the top rod 81 and the surface of the pull rod 5. This accumulated dust can easily enter the gap when the two rotate relative to each other, resulting in uneven rotation. The groove 52 allows the top rod 81 to move inward a little distance along the axis of rotation, and the bristles can cover it, so that dust will not accumulate at the corner formed with the pull rod 5. After rotation, the top rod 81 slides out along the inclined surface, and the shoulder compresses and breaks the bristles to eject the dust in the bristles. After the top rod 81 leaves the groove 52, the bristles clean the edge dust.

[0030] See Figure 7 The guide groove 53 is used to create a lateral shoulder effect, that is, when the top rod 81 rotates, the bristles can vibrate. Another point is to facilitate the dust on the edge of the groove 52 to fall downward, avoiding the accumulation at the lowest point of the ring due to the restriction of the edge of the groove 52. Also, when the bristles brush, dust will enter the inner edge of the groove 52. Without the guide groove 53, it would accumulate at the bottom. The upper side wall of the top rod 81 is inclined outward along the axis of rotation or downward in the left and right directions to avoid the formation of horizontal or locally concave areas, which would then accumulate dust.

[0031] See Figure 2 and Figure 3 When only the first chamber 1 is provided, it is difficult to screen out larger particles in the dust-laden airflow. Larger particles are prone to causing premature clogging of the filter cartridge, and larger particles hitting the surface of the filter cartridge will also affect the service life of the filter cartridge. Therefore, a second chamber 11 is provided on one side of the first chamber 1, and the air inlet 2 is located on the side of the second chamber 11 away from the first chamber 1. A channel 12 is opened between the first chamber 1 and the second chamber 11, and the airflow is introduced through the channel 12. The highest point of the edge of the channel 12 is lower than the lowest point of the edge of the air inlet 2 so that the airflow can change direction. The airflow first hits the inner wall of the second chamber 11, and then enters the first chamber 1, which can screen out some larger dust particles.

[0032] To improve the flow diversion effect, an inclined baffle plate 16 is provided at the upper edge of the channel 12 in the second chamber 11. This not only increases the airflow impact surface, but also causes the airflow to flow to the right, using the other side for impact, further improving the screening of large-diameter particles and achieving the purpose of protecting the filter cartridge.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust collector for a shot blasting machine, comprising a first chamber (1), wherein one side of the first chamber (1) is provided with an air inlet (2) connected to the exhaust port of the shot blasting machine, characterized in that: The first chamber (1) has several outlets (3) on the opposite side of the air inlet (2). The top of the first chamber (1) is provided with a bracket (4) facing the outlet (3). Two adjacent brackets (4) form the mounting of the filter cartridge. The lower edge of the bracket (4) is rotatably connected to the pull rod (5) at intervals along its length. The lower part of the bracket (4) is provided with a connecting rod (6) rotatably connected to the pull rod (5) on the bracket (4). The connecting rod (6) is parallel to the bracket (4) above it. The connecting rod (6) makes the pull rod (5) move synchronously. The bottom of the pull rod (5) located on the outlet (3) side of the bracket (4) extends downward to form a handle (7). The top of the pull rod (5) is provided with a protrusion (8). When an external force is applied to the handle (7), the protrusion (8) on the pull rod (5) continuously pushes up the end of the filter cartridge. When the protrusion (8) rotates with the pull rod (5), the position of the filter cartridge changes, pushing or pushing the filter cartridge out along the length of the bracket (4). An air outlet (9) is provided on the first chamber (1), and the air outlet (9) is connected to the space above the filter cartridge in the first chamber (1).

2. The dust collector for a shot blasting machine according to claim 1, characterized in that: The protrusion (8) is composed of two push rods (81). The push rod (81) is rotatably connected to the pull rod (5) at the rotatable connection between the pull rod (5) and the bracket (4). An elastic element (82) is provided between the push rod (81) and the push rod (81) or the pull rod (5). A limiting block (51) is provided at the top of the pull rod (5) to limit the maximum angle of rotation between the two push rods (81). When an external force is applied to the pull rod (5) by the handle (7), the push rod (81) on the side with the same direction of force application lifts the filter cylinder. As the pull rod (5) continues to move, the other push rod (81) disengages from the filter cylinder and moves to the position between the two push rods (81) under the action of the elastic element (82) and contacts the filter cylinder again. As the pull rod (5) moves in the opposite direction.

3. A dust collector for a shot blasting machine according to claim 2, characterized in that: The rotating connection surface between the push rod (81) and the pull rod (5) is provided with a resistance surface (10) with a bidirectional friction coefficient. The resistance surface (10) applies pressure to the push rod (81) when the single push rod (81) does not support the filter cartridge due to the action of the limit block (51).

4. A dust collector for a shot blasting machine according to claim 2, characterized in that: The upper end of the push rod (81) is a downward curved arc, and the distance to the center of the rotation axis between the push rod (81) and the pull rod (5) increases as the arc surface extends outward.

5. A dust collector for a shot blasting machine according to claim 2, characterized in that: The top side wall of the pull rod (5) is provided with a groove (52) that is compatible with the top rod (81). The depth of the groove (52) is less than 0.1 mm, and the edge is chamfered into a bevel. A shoulder is provided at the top of the bevel transition. A layer of bristles is provided on the side wall of the top rod (81).

6. A dust collector for a shot blasting machine according to claim 4, characterized in that: The top sidewall of the pull rod (5) is also provided with a guide groove (53) extending toward the handle (7), and the upper sidewall of the top rod (81) is inclined downward or outward in the same direction.

7. A dust collector for a shot blasting machine according to claim 1, characterized in that: A second chamber (11) is provided on one side of the first chamber (1). An air inlet (2) is provided on the side wall of the second chamber (11) that is relatively far away from the first chamber (1). A channel (12) is provided between the first chamber (1) and the second chamber (11). The horizontal height of the channel (12) is lower than that of the air inlet (2).

8. A dust collector for a shot blasting machine according to claim 7, characterized in that: In the second chamber (11), a baffle (13) is provided at the upper edge of the channel (12) facing the air inlet (2). The baffle (13) shields and collides the particles in the dust-laden gas, causing them to fall into the collector below.

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