Explosion-proof lifting hook type shot blasting machine

Abstract

The invention discloses an explosion-proof lifting hook type shot blasting machine and relates to the technical field of shot blasting machines, the explosion-proof lifting hook type shot blasting machine comprises a shot blasting chamber, an opening part is formed in the top of the shot blasting chamber, cover plates are arranged on the outer surface of the top of the shot blasting chamber and located on the two sides of the opening part, the two cover plates are rotationally opened and closed, and the side walls of the two cover plates abut against each other in the closed state; the end, located outside the shot blasting chamber, of the cover plate is connected with a first guide plate, the cover plate is provided with second guide plates located in the center of the top of the shot blasting chamber, the lifting appliance is provided with a guide ring, a containing opening is formed between the two second guide plates, and the containing opening is used for allowing the lifting appliance to pass through. Through the matching of the two guide plates and the guide ring, the cover plate is opened or automatically closed in the lifting appliance moving process, and compared with a sliding cover plate or an automatic part, the mode is small in occupied space, meanwhile, friction is not generated on the closed surface of the cover plate, a good closed state can be always kept, and steel shots are more effectively prevented from flying out.

Description

Technical Field

[0001] The invention relates to the technical field of shot blasting machines, in particular to an explosion-proof hook-type shot blasting machine. Background Art

[0002] Shot blasting machine refers to casting equipment that uses high-speed projectiles thrown by shot blasting machines to clean or strengthen the surface of castings. Through shot blasting cleaning, not only can rust, oxide scale, molding sand, etc. on the surface of the workpiece be removed, but also the internal stress of the workpiece can be reduced and the fatigue strength of the workpiece can be improved.

[0003] The hook-type shot blasting machine mainly refers to the workpiece being transported to the center of the shot blasting room by the hanger on the top of the shot blasting machine. During the entire shot blasting process, the workpiece is on the hanger and is moved out of the shot blasting room with the hanger after the shot blasting is completed. Therefore, there is an opening at the top of the shot blasting room of the hook-type shot blasting machine for the hanger to pass through. Because of the existence of the opening, the steel shot is easy to fly out during shot blasting, so a sealing structure is set at the opening. The most common sealing method is shown in Figure 1, that is, a brush, two sealing strips in an inverted herringbone shape and a fixed type are set in sequence from top to bottom at the opening. The shielding plate can isolate most of the flying steel shots, but the above three cannot form a complete seal, so some steel shots will fly out, and the hanger moves at the end of shot blasting, and the steel shots retained in the brush generate kinetic energy because the hanger pushes the brush, and then may fly out from the mouth. In addition, in the prior art, there is also a component that can seal the mouth by arranging a movable mechanism on the top of the shot blasting machine, and the movable mechanism is used to drive the component to seal the mouth. The component seals the mouth when the hanger reaches the predetermined position of the shot blasting chamber, or when the hanger moves. In the embodiment, the seal moves with the hanger, such as the content disclosed in the publication number CN118081637A. This method can have better sealing performance. However, this method requires electric or pneumatic components to be arranged on the top of the shot blasting machine, and also requires multi-structure coordination, which occupies a large amount of space. It is necessary to fully consider the installation space and also because the shot blasting machine will generate noise and vibration, which has a great impact on the life of the electric or pneumatic components. In the linkage top sealing device of the hook shot blasting machine disclosed in the publication number CN101862993B, a movable cover plate that moves with the push of the hanger is arranged on the top of the shot blasting machine. It does not require electric or pneumatic components, and the structure is also simple. It also has a better sealing effect than the conventional sealing method. However, the device also has a notch position, that is, the overlapping area of ​​the position guide groove and the mouth, as shown in the shaded area in Figure 2, and the static friction between the movable cover plate and the upper surface of the mouth when sliding will produce a gap after long-term use. When there is a gap, the steel shot splashed during the shot blasting process may enter the gap, resulting in a jam. The above-mentioned methods all have defects. For this reason, we propose an explosion-proof hook type shot blasting machine. Summary of the invention

[0004] The object of the present invention is to provide an explosion-proof hook-type shot blasting machine to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an explosion-proof hook-type shot blasting machine, comprising a shot blasting chamber, a mouth portion is provided at the top of the shot blasting chamber, the mouth portion is used for a hanger to enter the shot blasting chamber from the shot blasting chamber, the top outer surface of the shot blasting chamber is located on both sides of the mouth portion and covers are provided, the two covers are rotated to open and close, and the side walls of the two covers are in contact with each other in a closed state, a first guide plate is connected to the end of the cover plate located outside the shot blasting chamber, and a second guide plate is provided at the center of the top of the shot blasting chamber, a guide ring is provided on the hanger, the guide ring contacts the first guide plate, the cover plate and the second guide plate in sequence on the path of the hanger entering the shot blasting chamber, contacts the inner wall of the first guide plate when contacting the first guide plate and gradually lifts it, and makes the cover plate gradually move down and close when passing through the second guide plate, and an accommodating opening is provided between the two second guide plates, and the accommodating opening is used for the hanger to pass through.

[0006] Preferably, the mouth is provided with a brush, a sealing gasket and a shielding plate in sequence from top to bottom along the extension direction of the sling.

[0007] Preferably, a spherical body is fixedly mounted on the hanger, and a cylindrical limiter is slidably arranged on the surface of the spherical body. When the hanger reaches a predetermined position in the shot blasting chamber, the limiter is located directly above the two second guide plates to limit the opening of the cover plate. In the direction in which the mouth extends outward, the minimum horizontal gap between the guide ring and the inner wall of the second guide plate is greater than the minimum horizontal gap between the bottom wall of the limiter and the outer wall of the second guide plate.

[0008] Preferably, in the shot blasting state, the axial projection of the guide ring in the extension direction of the sling covers the projection of the accommodating opening in the same direction.

[0009] Preferably, a protective plate is rotatably connected to the lower side of the cover plate. When the cover plate is lifted, the side of the protective plate close to the mouth contacts the outer wall of the top of the shot blasting chamber to form an isolation, thereby blocking the flying steel shots and pushing the steel shots on the top toward the mouth when the cover plate is closed.

[0010] Preferably, when the cover is in a closed state, a side of the protective plate close to the mouth is flush with an edge of the mouth.

[0011] Preferably, when the guide ring and the cover plate are in contact, the two are in line contact.

[0012] Preferably, the first guide plate and / or the second guide plate is detachably fixed to the cover plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention uses the cooperation of two guide plates and a guide ring to open or automatically close the cover plate during the movement of the sling. Compared with a sliding cover plate or an automated component, this method occupies less space and at the same time, the closed surface of the cover plate does not generate friction, and can always maintain a good closed state, more effectively preventing the steel shot from flying out.

[0015] The limiter provided in the present invention can play a certain limiting role after the cover is closed, preventing the vibration of the cover from generating noise or damage;

[0016] The present invention provides a protective plate at the bottom of the cover plate, which can prevent the steel shots from splashing due to the brush and can also collect the steel shots, thus achieving two purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] FIG1 is a schematic diagram of the overall structure of the mouth structure of an existing shot blasting machine;

[0018] FIG2 is a schematic diagram of the covering structure of the movable cover;

[0019] FIG3 is a schematic diagram of the overall top view of the structure of the present invention;

[0020] FIG4 is an enlarged schematic diagram of the structure of area B in FIG3 ;

[0021] FIG5 is a schematic cross-sectional view of the section AA in FIG3 ;

[0022] FIG6 is an enlarged schematic diagram of the structure of area C in FIG5 ;

[0023] FIG7 is a schematic diagram of the cover plate and the guide ring in contact and open state;

[0024] FIG8 is an enlarged schematic diagram of the structure of region D in FIG7 ;

[0025] FIG. 9 is a schematic diagram of a cross-sectional state of the second guide plate.

[0026] In the figure: 1-shot blasting chamber; 2-cover plate; 3-first guide plate; 4-second guide plate; 5-guide ring; 6-accommodating port; 7-brush; 8-sealing gasket; 9-shielding plate; 10-spherical body; 11-limiter; 12-protective plate; 101-mouth. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Please refer to Figures 3, 4, 5, 6, 7 and 9. The present invention provides a technical solution: an explosion-proof hook-type shot blasting machine, comprising a shot blasting chamber 1 consisting of a square relatively closed cavity, a closable door is arranged on the front side, and a shot blasting motor and a shot blasting launcher are arranged on the adjacent side, a mouth 101 is opened on the top wall of the shot blasting chamber 1, extending from the front side to the opposite side thereof, a track is arranged above the shot blasting chamber 1, a sling is arranged on the track, the sling mounts the workpiece and sends the workpiece from the mouth 101 to the central position in the shot blasting chamber 1, and then the sling rotates to drive the workpiece to rotate for shot blasting;

[0029] The cover plate 2 is arranged in the same direction as the mouth 101, and the two cover plates 2 completely cover the mouth 101 in the closed state. The cover plate 2 is arranged in a door shape, and one side thereof is rotatably mounted on the top outer surface of the shot blasting chamber 1 by means of an axis or hinge. The stability is improved by setting multiple connection points. The lateral width of a single cover plate 2 is slightly larger than half the width of the mouth 101, and it only needs to be able to close and cover the mouth 101;

[0030] The first guide plate 3 is fixed to the end of the cover plate 2 in the opening direction of the mouth 101 (i.e., the opposite end in the Y direction), and the two first guide plates 3 are also fitted together when the two cover plates 2 are closed. The second guide plate 4 is divided into two parts, i.e., a part that is the same or similar to the first guide plate 3, i.e., a section close to the first guide plate 3 with the AA section as the boundary is the first part, which can be the same as the first guide plate 3, but symmetrically arranged with the first guide plate 3 on the same cover plate 2, i.e., the cross section of the first guide plate 3 along the positive direction of the Y axis is a descending and continuous curve, while the first section of the second guide plate 4 is the opposite, and the cross section along the positive direction of the Y axis is an ascending and continuous curve, and, for example, as shown in FIG. 9 , it can also be a straight oblique line, or a parabola-like line, but because it needs to contact and slide with the guide ring 5, it is preferably in the state of FIG. 9 or a straight oblique line, and the second section of the second guide plate 4 only needs to avoid the guide ring 5, The guide ring 5 is an annular body centered on the axis of the hanger rod. The guide ring 5 is fixed on the hanger, and its initial horizontal position is higher than the lower surface of the cover plate 2 in the closed state. The edges of the opposite sides of the two first guide plates 3 are away from a corner of the second guide plate 4 to set an avoidance surface, which can be an inclined surface or an arc surface. The guide ring 5 first contacts the first guide plate 3 on the moving path of the hanger. Under the action of the inner surface of the first guide plate 3, the cover plate 2 is lifted and rotated to be in an open state. Under the guidance of the first guide plate 3, the lower surface of the lifted cover plate 2 contacts and slides with the guide ring, and the cover plate 2 is in the open state shown in Figure 7, which is convenient for the movement of the hanger. When the hanger moves to the central position (the central area of ​​the shot blasting room 1 when viewed from above), that is, the area where the second guide plate 4 is located, under the cooperation of the first section of the second guide plate 4 and the guide ring 5, the cover plate 2 drops again and fits the upper surface of the shot blasting room 1, thereby being in a closed state.

[0031] As shown in FIG4 , when the sling reaches the predetermined position of the shot blasting chamber 1 (i.e., the predetermined position for shot blasting), in order to completely close the cover plate 2, the second guide plate 4 is required to avoid the sling, so an accommodating opening 6 is opened, and the minimum diameter of the accommodating opening 6 is larger than the maximum diameter of the sling rod, and a gap is left between the two to facilitate the rotation of the sling. The cover plate 2 can be opened by setting a reasonable counterweight, and only a very small part of the flying steel shots are not enough to break it open.

[0032] Referring to Figure 5, on the basis of implementing the cover plate 2, the existing conventional settings can also be retained, that is, the brush 7, the sealing gasket 8 and the baffle plate 9 are retained. The brush 7, the sealing gasket 8 and the baffle plate 9 are used to perform a sealing once, and the kinetic energy of the flying steel shot is reduced, while the cover plate 2 is completely sealed. The brush 7, the sealing gasket 8 and the baffle plate 9 not only seal, but also reduce a certain amount of noise. If the steel shot directly impacts the cover plate 2, it will cause a lot of noise and produce impact vibration.

[0033] Referring to FIG. 5 and FIG. 6 , in order to improve the stability of the cover plate 2 during the shot blasting process, a limiter 11 is provided on the hanger for restriction. The limiter 11 is a cylindrical body, and its upper end is slidably connected with the spherical body 10 integrally provided on the hanger, that is, it can swing on the spherical body 10 around the center of the spherical body 10. When the cover plate 2 is closed, the horizontal height of the bottom edge of the limiter 11 is lower than the horizontal height of the upper edge of the second guide plate 4, so that the second guide plate 4 can be restricted by the limiter 11, thereby restricting the cover plate 2;

[0034] Specifically, when the hanger advances along the Y direction into the shot blasting chamber 1, when it reaches and contacts the second guide plate 4, the cover plate 2 drops with the movement of the hanger, and before the cover plate 2 is close to the closed state, a part of the lower edge area of ​​the limiter 11 contacts the second guide plate 4 and can be shaken to avoid it, and further, a buffer ring is provided on the bottom wall of the limiter 11, and the buffer ring can be squeezed when it contacts the second guide plate 4, thereby preventing the limiter 11 from being unable to pass. At this time, because part of the edge of the limiter 11 is located on the second guide plate 4, the limiter 11 is in an inclined state, and then as the hanger moves, the two second guide plates 4 are closed, and the advancing direction of the limiter 11 The bottom wall on the side contacts the upper edge of the second guide plate 4 again, and when passing through again, as shown in Figure 6, the limiter 11 is located directly above the second guide plate 4, and the axis of the limiter 11 is in a vertical state, pressing the second guide plate 4 downward, and the minimum horizontal gap between the guide ring 5 and the inner wall of the second guide plate 4 is larger than the minimum horizontal gap between the bottom wall of the limiter 11 and the outer wall of the second guide plate 4. This is to facilitate the limiter 11 to move and tilt first when the sling moves. The setting of the limiter 11's shaking is relative to directly setting the buffer ring. The action of the limiter 11 can avoid the positive extrusion of the buffer ring and the second guide plate 4 as much as possible, thereby increasing the practical life of the buffer ring.

[0035] Referring to Figures 3 and 4, the shot blasting state is the working state, and the hanger is located in the center of the shot blasting room 1. In this state, from the top view of the shot blasting machine, the edge of the accommodating opening 6 is completely accommodated by the guide ring 5, which can be simply understood as the guide ring 5 is larger than the accommodating opening 6, so as to block it and prevent the steel shot from flying out due to the accommodating opening 6.

[0036] Referring to Fig. 7 and Fig. 8, when setting the conventional brush 7, sealing pad 8 and shielding plate 9 structure, because when the sling moves, it will continuously contact and squeeze the brush 7, and then the steel shot in the brush 7 will generate kinetic energy, that is, it will be ejected. The kinetic energy of the steel shot in the ejection process is relatively small, and it will be blocked by the guide ring 5, the cover plate 2 and the second guide plate 4. However, the steel shot will enter the area below the cover plate 2, and then hinder the subsequent closing of the cover plate 2. Therefore, only the protective plate 12 is set to form a block. The length of the protective plate 12 along the Y axis is the same as that of the cover plate 2. During the rising process of the cover plate 2, the protective plate 12 will automatically contact the upper surface of the shot blasting chamber 1 on one side under the action of gravity (when setting the brush structure, the L-shaped plate is usually set higher than the top wall of the shot blasting chamber 1. At this time, the protective plate 12 contacts the top wall of this part of the structure, as shown in Fig. 7);

[0037] Furthermore, in order to better collect steel shots, all steel shots need to be pushed into the mouth 101. Therefore, the lateral edge of the protective plate 12 is flush with the edge of the mouth 101 when the cover plate 2 is in a horizontal state, so that steel shots will not be retained in the space below the cover plate 2.

[0038] Referring to Figure 8, the edge of the upper surface of the guide ring 5 is a bevel. When the cover plate 2 contacts the guide ring 5, the oblique line of the bevel in the cross-sectional state is parallel to and in contact with the cross-sectional line of the lower surface of the cover plate 2, so as not to form point contact. The friction of point contact is likely to concentrate pressure and cause scratches.

[0039] The lower surfaces of the first guide plate 3 and the second guide plate 4 will contact and slide with the guide ring 5, and because they need to be lifted or lowered, the lower surfaces of the first guide plate 3 and the second guide plate 4 will rub back and forth. Compared with the parallel friction of the cover plate 2, the friction of the curved surface is more serious, especially when the lifting action occurs. Therefore, the detachable setting is convenient for replacement.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof hook-type shot blasting machine, comprising a shot blasting chamber (1), wherein a mouth (101) is provided at the top of the shot blasting chamber (1), and the mouth (101) is used for a lifting device to enter the shot blasting chamber (1) from outside the shot blasting chamber (1), and characterized in that: The top outer surface of the shot blasting chamber (1) is provided with cover plates (2) on both sides of the mouth (101), the two cover plates (2) are rotated to open and close, and the side walls of the two cover plates (2) are in contact with each other in the closed state, one end of the cover plate (2) located outside the shot blasting chamber (1) is connected to a first guide plate (3), and the cover plate (2) is provided with a second guide plate (4) at the center of the top of the shot blasting chamber (1), and a guide ring (5) is provided on the hanger, and the guide ring (5) contacts the first guide plate (3), the cover plate (2) and the second guide plate (4) in sequence on the path of the hanger entering the shot blasting chamber (1), contacts the inner wall of the first guide plate (3) and gradually lifts it when contacting the first guide plate (3), and gradually moves the cover plate (2) downward and closes when passing through the second guide plate (4), and an accommodating opening (6) is provided between the two second guide plates (4), and the accommodating opening (6) is used for the hanger to pass through.

2. The explosion-proof hook-type shot blasting machine according to claim 1, characterized in that: The mouth (101) is provided with a brush (7), a sealing gasket (8) and a shielding plate (9) in order from top to bottom along the extension direction of the sling.

3. An explosion-proof hook-type shot blasting machine according to claim 1 or 2, characterized in that: A spherical body (10) is fixedly sleeved on the sling, and a cylindrical limiter (11) is slidably arranged on the surface of the spherical body (10). When the sling reaches a predetermined position in the shot blasting chamber (1), the limiter (11) is located directly above the two second guide plates (4) to limit the opening of the cover plate (2). In the direction in which the mouth (101) extends outward, the minimum horizontal gap between the guide ring (5) and the inner wall of the second guide plate (4) is greater than the minimum horizontal gap between the bottom wall of the limiter (11) and the outer wall of the second guide plate (4). A buffer ring is arranged at the bottom of the limiter (11).

4. An explosion-proof hook-type shot blasting machine according to claim 1 or 2, characterized in that: In the shot blasting state, the axial projection of the guide ring (5) in the extension direction of the sling covers the projection of the receiving opening (6) in the same direction.

5. The explosion-proof hook-type shot blasting machine according to claim 2, characterized in that: The lower side of the cover plate (2) is rotatably connected to a protective plate (12); when the cover plate (2) is lifted, the side of the protective plate (12) close to the mouth (101) contacts the top outer wall of the shot blasting chamber (1) to form an isolation barrier, thereby blocking the flying steel shots, and when the cover plate (2) is closed, the steel shots on the top are pushed toward the mouth (101).

6. The explosion-proof hook-type shot blasting machine according to claim 5, characterized in that: When the cover plate (2) is in a closed state, a side of the protective plate (12) close to the mouth (101) is flush with the edge of the mouth (101).

7. An explosion-proof hook-type shot blasting machine according to claim 1 or 2, characterized in that: When the guide ring (5) and the cover plate (2) are in contact, the two are in line contact.

8. The explosion-proof hook-type shot blasting machine according to claim 1, characterized in that: The first guide plate (3) and / or the second guide plate (4) are detachably fixed to the cover plate (2).

Images