Steel plate shot blasting shot embedding prevention device and shot blasting machine

Abstract

The invention discloses a steel plate shot blasting anti-shot-embedding device and a shot blasting machine, and the steel plate shot blasting anti-shot-embedding device comprises a protection plate which is located below a roller way surface of a roller way formed by roller shafts and is vertically arranged; the slewing bearing is located on the lower portion of the protection plate and used for supporting the protection plate through a rotating shaft, so that the protection plate has the freedom degree of rotating around the axis of the rotating shaft, and the axis of the rotating shaft is parallel to the axis of the roller shaft; the free constraint is arranged at the slewing bearing and applies a first torque to the guard plate; and the adjusting constraint is arranged at the slewing bearing and applies second torque to the protection plate, the second torque and the first torque are equal in size and opposite in direction, and the adjusting constraint provides hard limiting so as to adjust the gap between the upper end of the protection plate and the steel plate to be cleaned. The steel plate shot blasting shot embedding prevention device is relatively good in reliability.

Description

Technical Field

[0001] The invention relates to a shot-embedding prevention device for preventing shot materials from being embedded between a steel plate and a roller in a steel plate shot blasting process, and also relates to a shot blasting machine equipped with the shot-embedding prevention device. Background Art

[0002] When the steel plate is shot blasted in the shot blasting room, it moves roughly horizontally, and the lower surface of the steel plate is shot blasted at a predetermined position in the shot blasting room. The component that supports the steel plate in the shot blasting room is a roller conveyor, which usually includes a set of roller shafts. The working shaft section of the roller shaft is generally a cylinder, so a wedge-shaped space is formed between the lower surface of the steel plate placed on the roller conveyor and the roller shaft. In the shot blasting area, the wedge-shaped space corresponding to the front side of the running direction of the steel plate is easy to be sandwiched by the part such as the projectile that flies into the wedge-shaped space due to the movement of the roller shaft and the steel plate. The sandwiched projectile is gradually squeezed as the roller shaft rotates. It should be known that the projectiles used for shot blasting are generally of relatively high hardness. In addition, some of the projectiles in the shot material will be damaged, which can easily scratch the lower surface of the steel plate and damage the roller shaft.

[0003] In view of this, in order to adapt to the steel plate shot blasting process, a shot-preventing device for preventing shot embedding is usually arranged at the shot blasting position of the shot blasting room. A common shot-preventing device includes a bracket located below the roller shaft and a guard plate installed on the bracket and extending upward with a small gap or slight engagement with the steel plate. The small gap is mainly used to avoid direct contact between the guard plate and the steel plate while also preventing the steel shot from passing through the gap. Therefore, the gap is usually less than or equal to the diameter of the complete projectile.

[0004] From the above description, it can be known that the guard plate currently installed in the shot blasting room and located below the roller support surface has the basic function of preventing the projectiles, such as steel shots, from being embedded in the wedge-shaped space between the roller and the area to be cleaned; in addition, the guard plate can also absorb the impact energy and sound of the steel shots, and can effectively reduce noise pollution. However, during the long-term operation of the equipment, the guard plate will be affected by the impact of the steel shots, which will cause wear or damage, resulting in an increase in the gap between the guard plate and the steel plate to be cleaned, increasing the probability of shot embedding and affecting work efficiency. Therefore, when designing the function of shot blasting equipment, it is required that the workpiece meets the shot blasting quality when the equipment is running, and the guard plate needs to be adjusted in time.

[0005] In some implementations, the guard plate has an elongated hole in the vertical direction and is fixed to the bracket by bolts. The upward extension of the guard plate is adjusted according to the working conditions and the wear of the guard plate, so as to ensure the quality of shot blasting and avoid the projectile being embedded in the wedge-shaped space due to the excessive gap. The elongated hole has a natural defect in that due to the existence of the elongated hole, there is a lack of surface constraint in the up and down directions, and the guard plate can only maintain the adjusted posture by the friction force generated by the pre-tightening force of the bolts. Vibration will be generated during the shot blasting process. Even if the bolts are not loose, the guard plate may creep downward due to the vibration, and the gap will gradually increase. At the same time, it should be known that the problem of bolt loosening prevention under vibration conditions has always been a conventional problem in the mechanical field. Once the bolts are loose, the friction force will be less than the gravity of the guard plate, and the protection of the guard plate will be completely ineffective.

[0006] There is another implementation that does not require a guard plate. In this implementation, the roller shaft adopts a toothed roller shaft. Due to the existence of the tooth groove, even if a projectile enters the wedge-shaped space, it will intervene in the tooth groove, and will not cause the projectile to be sandwiched between the steel plate to be cleaned and the roller shaft. When the roller shaft continues to rotate and the tooth groove embedded with the projectile cannot restrict the projectile, the projectile will fall from the tooth groove to the bottom of the shot blasting chamber. This implementation structure is simple, but due to the presence of teeth, it may cause bites to the steel plate. It should be known that the conveying of the steel plate by the roller shaft relies on friction. In the early stage of contact between the steel plate and the roller shaft, sliding friction will be generated, which is the main reason for the bite of the steel plate. In addition, since different roller shafts cannot achieve exactly the same angular position at the same time, the support height of the steel plate when it is conveyed on the roller conveyor will deviate, which will cause the steel plate to float up and down on the roller conveyor. While generating the impact force, it will also cause only a few roller shafts to be in the state of supporting the steel plate at a certain moment, thereby increasing the burden on the roller shaft bearing and making it easier to cause the steel plate to be bitten. Summary of the invention

[0007] In view of this, an object of the present invention is to provide a steel plate shot blasting and anti-ball embedding device with relatively good reliability. The present invention also provides a shot blasting machine equipped with the steel plate shot blasting and anti-ball embedding device.

[0008] According to a first aspect of an embodiment of the present invention, a steel plate shot blasting and anti-shot embedding device is provided, which is used to prevent the projectiles from embedding between the steel plate to be cleaned and the roller shaft, and the steel plate shot blasting and anti-shot embedding device comprises: The guard plate is located below the roller surface of the roller table composed of roller shafts and is arranged vertically; A slewing bearing, located at the lower part of the guard plate, is used to support the guard plate through a rotating shaft so that the guard plate has the freedom to rotate around the axis of the rotating shaft, and the axis of the rotating shaft is parallel to the axis of the roller shaft; A free constraint is arranged at the slewing bearing and applies a first torque to the guard plate; The adjustment constraint is arranged at the slewing bearing and applies a second torque to the guard plate. The second torque is equal to the first torque in magnitude and opposite in direction. The adjustment constraint provides a hard limit to adjust the gap between the upper end of the guard plate and the steel plate to be cleaned.

[0009] Optionally, the free constraint is: The first free constraint is a torsion spring mounted on the rotating shaft, one torsion arm of the torsion spring cooperates with the guard plate, and the other torsion arm cooperates with the seat of the slewing support; or The second free constraint is a catenary weight, the corresponding rotating shaft is fixedly connected to the guard plate, the catenary of the catenary weight is wound around the rotating shaft and suspends the weight; or The third free constraint includes a cantilever fixedly connected to the lower part of the guard plate, and a counterweight block arranged on the cantilever.

[0010] Optionally, if it is a first free constraint, a torsion spring is provided at each axial end of the rotating shaft and / or is provided in the middle of the rotating shaft; If it is the second free constraint, the catenary weight is provided at each axial end of the rotating shaft and / or is provided in the middle of the rotating shaft; If it is the third freedom constraint, the cantilever is provided with one at each axial end of the rotating shaft and / or one in the middle of the rotating shaft.

[0011] Optionally, in the third free constraint, there are multiple counterweight blocks, and the counterweight blocks are counterweight blocks with perforations, which are sequentially inserted into the corresponding cantilevers. A locking device is provided at the end of the cantilever for adjusting the number of counterweight blocks and locking them after adjustment.

[0012] Optionally, if it is a third freedom constraint, the cantilever and the adjustment constraint are separated on opposite sides of the rotation axis.

[0013] Optionally, the slewing bearing comprises: The bearing seat is fixedly mounted on the shot blasting chamber body at the lower part of the guard plate; The bearing pair is formed by the rotating shaft and the bearing, wherein one of the bearing or the rotating shaft is mounted on the bearing seat, and the other is mounted on the guard plate.

[0014] Optionally, the adjustment constraint comprises a support having a bolt hole facing the guard plate; A bolt is provided, which passes through the bolt hole and is held against the guard plate.

[0015] Optionally, the bolt hole is a threaded hole or a plain hole. If it is a threaded hole, an adjustment thread pair is formed between the threaded hole and the bolt, and a locking nut is provided to lock the bolt after it is adjusted into place; If it is a smooth hole, the two end faces of the bolt corresponding to the support with the smooth hole are each equipped with a nut, one of the nuts is a positioning nut and the other nut is a locking nut.

[0016] Optionally, a limit plate is provided, the limit plate is located on one side of the guard plate, the side being the side where the adjustment constraint is located, and the adjustment constraint is based on the limit plate; The limiting plate is a bent plate, and correspondingly has a vertical plate and a flat plate connected to the upper end of the vertical plate.

[0017] According to a second aspect of an embodiment of the present invention, a shot blasting machine is provided, comprising the steel plate shot blasting anti-shot embedding device described in the first aspect of the embodiment of the present invention.

[0018] In an embodiment of the present invention, the provided steel plate anti-shot embedding device includes a guard plate, which is installed in the shot blasting room through a slewing bearing and is located below the roller surface, wherein the guard plate is vertically arranged, and the slewing bearing is located at the lower part of the guard plate, and the slewing bearing enables the guard plate to have the freedom to rotate around the axis of the rotating shaft provided by the slewing bearing. The gap between the upper end of the guard plate and the steel plate to be cleaned can be adjusted by adjusting the angle between the guard plate and the horizontal plane. Furthermore, a pair of constraints are provided to form a limit on one side of the guard plate and a limit on the other side, wherein the limit on the other side is provided by an adjustment constraint, and the adjustment constraint is a hard limit, that is, after the adjustment is completed, the hard limit is statically determined. One side limit is provided by a free constraint. In other words, the limiting force it provides is relatively small and there is room for movement. When the limiting force on the other side is relatively large, the free constraint will be retracted, which is conducive to adjustment. Since the hard limit is not easy to loosen, the free constraint will only cause position change when the hard limit changes, so the state stability of the adjusted guard plate is relatively good. Therefore, the steel plate shot blasting and anti-ball embedding device based on the embodiment of the present invention has relatively good reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the installation state of the steel plate shot blasting anti-shot embedding device in the shot blasting machine in one embodiment.

[0020] Figure 2 This is a schematic diagram of the steel plate being shot blasted on the roller table.

[0021] Figure 3 Schematic diagram of the structure of a steel plate shot blasting and anti-shot embedding device in one embodiment.

[0022] Figure 4 for Figure 3 Enlarged view of part I.

[0023] Figure 5 Schematic diagram of the limit plate structure in one embodiment.

[0024] In the figure: 1. Steel plate shot blasting anti-shot embedding device, 2. Roller, 3. Chamber wall, 4. Steel plate, 5. Shot blasting machine, 6. Wedge-shaped space.

[0025] 11. Counterweight block, 12. Counterweight arm, 13. Bearing seat, 14. Rotating shaft, 15. Bearing, 16. Guard plate, 17. Limit plate, 18. Adjustment assembly.

[0026] 171. Gap, 172. Vertical board, 173. Flat board.

[0027] 181. Adjusting seat, 182. Locking nut, 183. Bolt. DETAILED DESCRIPTION

[0028] In order to facilitate the overall description of the steel plate shot blasting and anti-ball embedding device 1 based on the embodiment of the present invention, the steel plate shot blasting cleaning process is briefly described below, and the contents that have been clearly described in the background technology part will not be repeated here.

[0029] The steel plate shot blasting process is usually completed in the shot blasting room. Since the steel plate to be cleaned (for the convenience of description, the steel plate to be cleaned will be referred to as the steel plate 4 below) is generally heavy, the steel plate 4 is generally transported by rollers. The roller is generally composed of a group of rollers 2, which are arranged in the direction of feeding and discharging in the shot blasting room. Since the steel plate 2 has a relatively large rigidity, there is often a relatively large distance between adjacent rollers 2, so that during the transportation of the steel plate 4, most of the lower surface of the steel plate 4 will be exposed. Therefore, the nozzle of the shot blaster 5 can be set below the roller, and the projectiles are ejected upward at a predetermined position to clean the lower surface of the steel plate 4. In this process, the projectiles will naturally fall after hitting the lower surface of the steel plate 4. This is also the reason why the steel plate 2 is not shot blasted from above. Shot blasting the upper surface of the steel plate 2 from above will result in a large amount of projectiles on the upper surface of the steel plate 2, which is not conducive to the recycling of projectiles.

[0030] like Figure 2 As shown, during shot blasting, the projectile flow will generally be ejected in a certain cone shape. If the target direction of the steel plate 4 is the front, then part of the projectile will fly upward and forward, and part of the projectile will fly upward and backward. Figure 2 There are two wedge-shaped spaces 6 corresponding to the area where the shot blaster 5 is located. The wedge-shaped space 6 located on the rear side will be in a gradually opening state due to the movement of the steel plate 4 and the roller 2, and will not cause the projectiles to be embedded therein. The wedge-shaped space 6 located on the front side will be in a gradually shrinking state due to the movement of the steel plate 4 and the roller 2, and it is easy to clamp the projectiles, transport them forward, and gradually clamp them.

[0031] It should be understood that the above-mentioned gradual opening and closing do not refer to the volume change of the wedge-shaped space 6 itself, but the state of spitting or swallowing generated based on the form of movement.

[0032] The same as the prior art is that the prevention of shot embedding is mainly to protect the wedge-shaped space 6 located at the rear of the shot blasting area. As for the guard plate 16, it can be selected with the same configuration as in the prior art, including material, shape, etc. Therefore, unless otherwise specified, the material and shape of the guard plate 16 in the prior art can be selected.

[0033] The presence of the guard plate 16 should not have a relatively large impact on the shot blasting itself, such as Figure 2 As shown, it is obvious that the guard plate 16 cannot block the path of the shot flow of the shot blaster 5. Therefore, the guard plate 16 is mostly set vertically. Even if there is a certain angle with the vertical plane, the angle is usually not greater than 7.5°. It can be confirmed that the guard plate 16 has a definite upper and lower part.

[0034] It should be known that if the lower portion of the guard plate 16 is mounted on a predetermined frame using, for example, a rotating shaft 14, the guard plate 16 will have the freedom to rotate, and based on the change in the rotation angle, the distance between its upper end and the steel plate 2 will change.

[0035] Furthermore, in an embodiment of the present invention, a steel plate shot blasting and anti-ball embedding device 1 is provided to adjust the gap between the upper end of the guard plate 16 and the steel plate 2 by means of the change in the angle of the guard plate 16, and the adjustment angle range is not greater than 15°. In a more preferred implementation, the overall angle adjustment range is not greater than 7.5°. It should be understood that the change in the gap between the upper end of the guard plate 16 and the steel plate 2 caused by the wear and deformation of the guard plate 16 will not be too large. Based on the aforementioned angle change of, for example, 7.5°, it should be sufficient to meet the adjustment of the guard plate 16. If it still cannot meet the desired adjustment, the guard plate 16 can be scrapped.

[0036] From the positional relationship, the guard plate 16 is located below the roller surface. The so-called roller surface refers to the equivalent supporting surface of the roller shaft 2 included in the roller, such as the steel plate 4. In principle, it is coplanar with the lower surface of the steel plate 4, or it is a tangent plane tangent to the generatrix on the roller shaft 2.

[0037] The guard plate 16 is located below the roller surface and is not in direct contact with the steel plate 4 as much as possible. If the guard plate 16 is made of a material with a certain elasticity, such as a rubber plate, contact can be made and the contact force can be 0, that is, the guard plate 16 is not subjected to the positive pressure of the steel plate 4. Based on the aforementioned positional relationship, the guard plate 16 can only be located below the roller surface, and the aforementioned contact will not cause it to extend upward from the roller surface.

[0038] Regarding the fit between the guard plate 16 and the steel plate 4, leaving a gap is preferred, and contact fit is the second choice. Regarding the example of leaving a gap, the size of the gap is positively correlated with the diameter of the projectile in the selected shot material. The diameter of the projectile used in steel plate shot blasting varies according to different shot blasting purposes, generally 0.8~5mm. The gap left does not necessarily need to be smaller than the projectile diameter, but less than or equal to 1.2D, where D is the projectile diameter. The aforementioned gap is only used to indicate disengagement. In other words, it should be as small as possible while satisfying the condition of disengagement. For example, for a projectile with a diameter of 1mm, the gap left can be 0.3~1.2mm. A gap that is too small is difficult to adjust quickly. Therefore, the gap can be slightly larger within the available range, and a larger value within the available range can be selected to facilitate quick adjustment.

[0039] As mentioned above, the installation method of the guard plate 16 is based on giving it the freedom of rotation. The axis corresponding to the freedom of rotation is a horizontal axis. Correspondingly, a slewing bearing is provided in the shot blasting chamber corresponding to the lower part of the guard plate 16. The axis of the rotating shaft 14 provided by the slewing bearing is a horizontal axis, which is obviously also parallel to the axis of the roller 2.

[0040] Under the condition of no constraint, the guard plate 16 is free to rotate around the axis of the rotating shaft 14. It should be known that in the field of mechanics, constraint refers to an object that limits the displacement of a non-free body. Constraint force refers to the reaction force generated by the constraint on the non-free body.

[0041] At the same time, it should be known that, as common sense in the field of mechanics, the magnitude of the restraining force provided by the constraint is uncertain, and the direction is always opposite to the displacement direction that the constraint can hinder. Other characteristics of the constraint are common sense in the field of mechanics and will not be elaborated here.

[0042] Based on the definition of constraint, it can be seen that the constraint does not necessarily come into contact with the constrained object in real time, and the magnitude of the constraint force is uncertain. It is only determined by the reaction force of the constrained object when the limiting effect occurs.

[0043] The guard plate 16 is installed below the roller surface through the rotating shaft 14, and a predetermined adjustment range is limited by a pair of constraints. In order to facilitate adjustment, one of the pair of constraints is called a free constraint, and the other is called an adjustment constraint. The adjustment constraint is used to adjust the rotation angle of the guard plate 16. If the main part of the guard plate 16 is in a vertical state as the initial position, and it is assumed that the rotation angle of the guard plate 16 in the initial state is 0°, then the adjustment constraint is adjusted according to the description above so that the range of motion of the guard plate 16 can be [-3.75°, 3.75°].

[0044] Furthermore, the free constraint is expressed in terms of positional relationship as being arranged at the slewing bearing, and applying the first torque to the guard plate 16; the so-called being located at the slewing bearing does not mean being attached to the slewing bearing, but may also be attached to the frame part of the shot blasting machine, as long as it can provide the required first torque. It can be easily determined by technicians in this field based on this, and it will not be repeated here.

[0045] Similarly, the adjustment constraint is also arranged at the slewing bearing, and is used to apply a second torque to the guard plate 16, and the second torque is equal in magnitude and opposite in direction to the first torque, that is, the guard plate 16 is placed in a balanced state by the two constraints. In other words, both constraints are in a state of real-time action with the guard plate 16, although the first torque or the second torque may be inconsistent during operation, it should be understood that, based on the concept of the present invention, the said equal magnitude and opposite in direction are only used to refer to the balanced state after adjustment, and have nothing to do with the fluctuation in the working state.

[0046] Furthermore, the floating constraint is based on the definition of "floating" in the mechanical field, which is a passive constraint. The adjustment constraint provides a hard limit, which is an active constraint. When the adjustment constraint is adjusted, the floating constraint will be passively displaced to establish a new balance. In other words, the existence of the floating constraint will not cause the guard plate 16 to become unstable in the working state.

[0047] Correspondingly, the adjustment constraint provides a hard limit, and the rotation angle of the guard plate 16 is changed by adjusting the adjustment constraint, so that the gap between the upper end of the guard plate 16 and the steel plate to be cleaned can be adjusted.

[0048] like Figure 4 The bolt 183 used for adjustment shown in the figure will not cause the sudden failure of the constraint provided by the bolt 183 even if the pre-tightening force between the bolt 183 and the locking nut 182 is weakened, so the reliability is relatively good. At the same time, it should be known that although the floating constraint is a passive constraint, the change in the first torque provided by it is relatively small. In other words, the change in the pre-tightening force corresponding to the bolt 183 is also small. Although the bolt 183 may be loosened due to vibration, it only causes a slight change in the angle of the guard plate 16, rather than a sudden failure of the adjustment constraint.

[0049] Regarding free constraints, several free constraints that are easier to implement are provided below. Technical personnel in this field can select other similar free constraints on this basis. For the convenience of distinction, these free constraints are described one by one according to the ordinal number.

[0050] The first free constraint is a torsion spring mounted on the rotating shaft 14. The torsion spring generally has two torsion arms. Although the torsion arms can be long or short, and the lengths of the torsion arms on the same torsion spring can also be different, one of them must be matched with the movable part, and the other must be matched with the relatively static part. The matching can be a combination or a joint. Among them, one torsion arm of the torsion spring matches with the guard plate 16, generally by supporting the guard plate 16 to provide a joint matching, and the other torsion arm matches with the seat of the slewing bearing, such as Figure 4 In the bearing seat 13 shown in FIG. 1 , under this condition, the force provided by the torsion spring provides a first torque, and has a floating space due to the change in the compression amount of the torsion spring itself. When the adjustment constraint is adjusted, the torsion spring is compressed or rebounded, thereby completing the adjustment. During the adjustment process, the compression or rebound of the torsion spring is in a passive change state, which is conducive to the adjustment of the corresponding adjustment constraint and timely establishes a new balance during the adjustment process.

[0051] The second free constraint is a catenary weight, and the corresponding rotating shaft 14 is fixedly connected to the guard plate 16. The catenary of the catenary weight is wound around the rotating shaft 14 and suspends the weight. Different from the first free constraint, when the catenary is in a naturally suspended state, the first torque provided is fixed and unchanged. Accordingly, in the first free constraint, the first torque will change with the change of the compression amount of the torsion spring.

[0052] The third free constraint includes a cantilever fixedly connected to the lower part of the guard plate 16, such as Figure 3 The counterweight arm 12 shown in the figure, and then, for example, the counterweight block 11 on the counterweight arm 12. The third free constraint is mainly achieved by means of the length of the cantilever and the gravity of the counterweight block 11 to achieve the setting of the first torque. Obviously, the angle between the cantilever and the horizontal plane will affect the length of the stress arm corresponding to the cantilever. This is common knowledge in the mechanical field and will not be repeated here. However, it should also be known that because the adjustment range corresponding to the guard plate 16 itself is very small, for example, less than or equal to 7.5°, under this condition, under the condition that the counterweight block 11 remains unchanged, the force arm corresponding to the counterweight arm 12 is in a state of little change.

[0053] Regarding the location and number of the components capable of providing the first torque in the specific configuration of the free constraint, for example, for the first free constraint, a torsion spring is provided at each axial end of the rotating shaft 14 and / or is provided in the middle of the rotating shaft 14. In other words, if only one torsion spring is provided, it is centrally disposed on the rotating shaft 14; if two are provided, one is provided at each axial end of the rotating shaft 14; if three are provided, one is provided on the left, middle, and right, respectively, to provide relatively balanced torque.

[0054] Similarly, if it is the second free constraint, a catenary weight is provided at each axial end of the rotating shaft 14 and / or is provided in the middle of the rotating shaft 14 .

[0055] If it is the third freedom constraint, the cantilever is provided with one at each axial end of the rotating shaft 14 and / or one in the middle of the rotating shaft 14 .

[0056] Correspondingly, regarding the rotating shaft 14, a half-shaft or through-shaft configuration can be adopted according to the aforementioned free constraint configuration. For example, in the first free constraint, two torsion springs are provided, and it is obviously not necessary to adopt a through-shaft. Instead, it is only necessary to provide a "half-shaft" at each of the lower ends of the guard plate 16 (the axial direction of the rotating shaft 14).

[0057] The through-axle is relatively stronger overall, but it also occupies a relatively larger space.

[0058] exist Figure 1 and Figure 4 The illustrated structure is an implementation of the third freedom constraint. As can be seen in the figure, there are multiple counterweight blocks 11, and the counterweight blocks 11 are counterweight blocks 11 with perforations, which are sequentially inserted into the corresponding counterweight arms 12. A locking device is provided at the end of the counterweight arm 12 for adjusting the number of counterweight blocks 11 and locking them after adjustment.

[0059] For example, the counterweight arm 12 is a round rod, and the cantilevered end thereof is a threaded head. After a given number of counterweight blocks 11 are mounted on the counterweight arm 12, a nut is used to cooperate with the threaded head to lock the counterweight arm 12.

[0060] In order to reduce or avoid interference, if it is a third freedom constraint, the cantilever and the adjustment constraint are separated on opposite sides of the rotation axis. Figure 3 In the illustrated structure, the counterweight arm 12 used as a cantilever is located on the left side of the rotating shaft 14, and the adjustment component 18 used as an adjustment constraint is located on the right side of the rotating shaft 14, so that the counterweight arm 12 will not interfere with the adjustment component 18 whether in assembly or adjustment.

[0061] As for the slewing support, there are two bearing seats 13, and the two bearing seats 13 are respectively provided at both ends of the rotating shaft 14. Whether a through shaft is used or not, it does not affect the selection of the position of the bearing seat 13.

[0062] The bearing seat 13 can be installed on the frame at the bottom of the shot blasting room, and can also be installed on the wall 3 of the shot blasting room.

[0063] Due to the selectivity of the elements, a bearing pair is used for overall description, and the bearing pair is formed by the rotating shaft 14 and the bearing 15 , wherein one of the bearing 15 or the rotating shaft 14 is installed on the bearing seat 13 , and the other is installed on the guard plate 16 .

[0064] In some embodiments, see Figure 4 The adjustment constraint includes a support, such as the adjustment seat 181 shown in the figure, see further Figure 5The adjusting seat 181 is a plate structure, and a bolt hole 184 is opened in the adjusting seat 181. Figure 4 As can be seen in FIG. 1 , the bolt hole 184 is opened toward the guard plate 16 .

[0065] A bolt 183 is provided, and the bolt 183 passes through the bolt hole 184 and is supported on the guard plate 16 . The rotation angle of the guard plate 16 is adjusted by adjusting the bolt 183 .

[0066] Furthermore, the bolt hole 184 is a threaded hole or a smooth hole. If it is a threaded hole, an adjustment thread pair is formed between the threaded hole and the bolt 183, and a locking nut 182 is provided to lock the bolt 183 after it is adjusted into place.

[0067] If it is a light hole, the bolt 183 is adapted with a nut corresponding to the two end faces of the support with the light hole, one nut is a positioning nut, and the other nut is a locking nut 182. When the adjustment seat 181 is a plate support, the two end faces correspond to two opposite plate surfaces of the plate support.

[0068] In a more preferred embodiment, a limit plate 17 is provided, and the limit plate 17 is located on one side of the guard plate 16, which is the side where the adjustment constraint is located. Further, the adjustment constraint is based on the limit plate 17. Figure 5 The structure shown is quite clear and will not be described in detail here.

[0069] exist Figure 5 In the illustrated structure, the limiting plate 17 is a bent plate, and correspondingly has a vertical plate 172 and a flat plate 173 connected to the upper end of the vertical plate 172, and has relatively good rigidity.

[0070] Both ends of the limiting plate 17 can be welded to the chamber wall 3 .

Claims

1. A steel plate shot blasting anti-shot embedding device, used to prevent the projectile from embedding between the steel plate to be cleaned and the roller shaft, characterized in that: The steel plate shot blasting and anti-shot embedding device comprises: The guard plate is located below the roller surface of the roller table composed of roller shafts and is arranged vertically; A slewing bearing, located at the lower part of the guard plate, is used to support the guard plate through a rotating shaft so that the guard plate has the freedom to rotate around the axis of the rotating shaft, and the axis of the rotating shaft is parallel to the axis of the roller shaft; A free constraint is arranged at the slewing bearing and applies a first torque to the guard plate; The adjustment constraint is arranged at the slewing bearing and applies a second torque to the guard plate. The second torque is equal to the first torque in magnitude and opposite in direction. The adjustment constraint provides a hard limit to adjust the gap between the upper end of the guard plate and the steel plate to be cleaned.

2. The steel plate shot blasting anti-shot embedding device according to claim 1, characterized in that: The freedom constraints are: The first free constraint is a torsion spring mounted on the rotating shaft, one torsion arm of the torsion spring cooperates with the guard plate, and the other torsion arm cooperates with the seat of the slewing support; or The second free constraint is a catenary weight, the corresponding rotating shaft is fixedly connected to the guard plate, the catenary of the catenary weight is wound around the rotating shaft and suspends the weight; or The third free constraint includes a cantilever fixedly connected to the lower part of the guard plate, and a counterweight block arranged on the cantilever.

3. The steel plate shot blasting anti-shot embedding device according to claim 2, characterized in that: If it is the first free constraint, a torsion spring is provided at each axial end of the rotating shaft and / or is provided in the middle of the rotating shaft; If it is the second free constraint, the catenary weight is provided at each axial end of the rotating shaft and / or is provided in the middle of the rotating shaft; If it is the third freedom constraint, the cantilever is provided with one at each axial end of the rotating shaft and / or one in the middle of the rotating shaft.

4. The steel plate shot blasting anti-shot embedding device according to claim 2 or 3, characterized in that: In the third free constraint, there are multiple counterweight blocks, and the counterweight blocks are counterweight blocks with perforations, which are sequentially inserted into the corresponding cantilevers. A locking device is provided at the end of the cantilever for adjusting the number of counterweight blocks and locking them after adjustment.

5. The steel plate shot blasting anti-shot embedding device according to claim 3, characterized in that: In the case of the third freedom constraint, the cantilever and the adjustment constraint are located on opposite sides of the rotation axis.

6. The steel plate shot blasting and anti-shot embedding device according to claim 1, characterized in that: The slewing bearing comprises: The bearing seat is fixedly mounted on the shot blasting chamber body at the lower part of the guard plate; The bearing pair is formed by the rotating shaft and the bearing, wherein one of the bearing or the rotating shaft is mounted on the bearing seat, and the other is mounted on the guard plate.

7. The steel plate shot blasting anti-shot embedding device according to claim 1, characterized in that: The adjustment constraint includes a support having a bolt hole facing the guard plate; A bolt is provided, which passes through the bolt hole and is held against the guard plate.

8. The steel plate shot blasting and anti-shot embedding device according to claim 7, characterized in that: The bolt hole is a threaded hole or a plain hole. If it is a threaded hole, an adjustment thread pair is formed between the threaded hole and the bolt, and a locking nut is provided to lock the bolt after it is adjusted into place; If it is a smooth hole, the two end faces of the bolt corresponding to the support with the smooth hole are each equipped with a nut, one of the nuts is a positioning nut and the other is a locking nut.

9. The steel plate shot blasting anti-shot embedding device according to claim 1, characterized in that: A limit plate is provided, the limit plate is located on one side of the guard plate, the side being the side where the adjustment constraint is located, and the adjustment constraint takes the limit plate as a base; The limiting plate is a bent plate, and correspondingly has a vertical plate and a flat plate connected to the upper end of the vertical plate.

10. A shot blasting machine, characterized in that: The invention comprises the steel plate shot blasting and anti-ball embedding device as described in any one of claims 1 to 9.

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