A sealing structure of a hook type shot blasting machine

Abstract

The present application relates to the technical field of shot blasting machines, and discloses a sealing structure of a hook-type shot blasting machine, which is used to solve the problems of excessively thick sealing rubber hindering the movement of the hook and severe wear at the contact point between the hook and the sealing rubber. By changing the sealing rubber fixedly installed in the guide groove of the top plate to an openable and closable type driven by a cylinder, sliding contact between the sealing rubber and the hook structure is avoided, and the thicker sealing rubber is prevented from hindering the movement of the hook structure. By arranging an annular sealing rubber on a transmission wheel, and providing a connecting shaft sleeve, a driving ring, a torsion spring and a steel wire rope, the sealing rubber is driven to rotate through the cooperation of the steel wire rope and the torsion spring, and the contact position of the sealing rubber with the hook structure is changed, so that the sealing rubber wears evenly. By providing intermittent threads and tension springs on the fixed rod and the transmission wheel, the edge wear is compensated when the sealing rubber is driven to rotate by the transmission wheel, thereby extending the service life of the sealing rubber.

Description

Technical Field

[0001] The present application relates to the technical field of shot blasting machines, and in particular to a sealing structure of a hook-type shot blasting machine. Background Art

[0002] A shot blasting machine is a foundry device that uses high-speed projectiles to clean or strengthen the surface of castings. It can simultaneously perform sand removal, core removal, and cleaning operations on castings. In some regions, it is also colloquially referred to as a sandblaster or sandblaster. A hook-type shot blasting machine is a type of shot blasting machine. It is primarily suitable for surface treatment of various medium and large castings, forgings, weldments, and heat-treated parts, including fragile and irregularly shaped workpieces.

[0003] The existing hook-type shot blasting machine is carried out by moving the hook in the guide groove of the top plate during loading and unloading. In order to prevent the shot blasting from flying out of the guide groove, the existing guide groove is provided with a sealing rubber and a brush to seal the guide groove. However, since the hook needs to squeeze the sealing rubber and the brush when moving, the thickness of the sealing rubber and the brush needs to be within a certain range. If the sealing rubber is too thick and has a high hardness, it will easily hinder the movement of the hook. If the sealing rubber is too thin and has a low hardness, it will not be able to prevent the shot blasting from flying out. In addition, during operation, the hook drives the workpiece to rotate. The long-term rotation of the hook will cause serious wear at the contact point between the hook and the sealing rubber, and shot blasting will still occur. Summary of the Invention

[0004] This application proposes a sealing structure for a hook-type shot blasting machine, which has the advantages of preventing the sealing rubber from affecting the movement of the hook and extending the service life of the sealing rubber. It is used to solve the problem that the excessively thick sealing rubber hinders the movement of the hook and the contact between the hook and the sealing rubber is severely worn.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a sealing structure of a hook-type shot blasting machine, comprising a shot blasting chamber, a sealing structure and a hook structure, wherein a top plate with a guide groove is fixedly installed on the top of the shot blasting chamber, and the sealing structure is arranged at the upper end of the guide groove, and the sealing structure comprises: a vertical plate, a flap bracket, a cylinder, a sealing plate and a sealing rubber, the vertical plate is fixedly installed on both sides of the guide groove, a hinge is fixedly installed at the middle position of the outer wall of the vertical plate; one side of the flap bracket is fixedly installed on the hinge, and a connecting ear is fixedly installed at the middle position of the top end of the outer wall of the flap bracket; one end of the cylinder is movably connected to the connecting ear, and the other end of the cylinder is movably connected to a mounting block, and the mounting block is fixedly installed on both sides of the top end of the top plate; the sealing plate is fixedly installed on the inner side of the flap bracket, and the sealing plate is bent in an "L" shape; the sealing rubber is arranged on the lower end surface of the sealing plate, and one side of the sealing rubber extends out of the sealing plate, and the extended sealing rubber is used to seal the guide groove.

[0006] Furthermore, the sealing rubber is set to be annular, and a support plate is fixedly provided at the bottom end of the upper wall of the sealing plate, and a slide groove is formed between the support plate and the upper plate of the sealing plate. Fixed rods are fixedly installed at both ends of the inner wall of the sealing plate, and the fixed rods are provided with: a transmission wheel, a connecting shaft sleeve, a driving ring and a torsion spring. The transmission wheel movable sleeve is arranged at the top end of the side wall of the fixed rod, and a sealing rubber is provided on the outer movable sleeve of the transmission wheel on the same sealing plate. One side of the sealing rubber is slidably installed in the slide groove; the connecting shaft sleeve, the driving ring and the torsion spring are sequentially arranged between the transmission wheel and the sealing plate. , and the movably sleeve is arranged on the outside of the fixed rod; one end of the connecting shaft sleeve is fixedly mounted on the side wall of the transmission wheel, and the other end of the connecting shaft sleeve is movably sleeved in the driving ring, and the side wall annular array of the connecting shaft sleeve in the driving ring is provided with ratchets, and the inner wall of the driving ring is movably provided with a pawl used in conjunction with the ratchets, one end of the torsion spring is fixedly mounted on the end face of the driving ring, and the other end of the torsion spring is fixedly mounted on the inner wall of the sealing plate; the side wall of the driving ring is fixedly connected to a steel wire rope, and one end of the steel wire rope passes through the flap bracket and is fixedly connected to the upper end face of the top plate.

[0007] Furthermore, the connecting shaft sleeve and the transmission wheel on the same sealing plate rotate in the same direction, while the connecting shaft sleeve and the transmission wheel on different sealing plates rotate in opposite directions.

[0008] Furthermore, when the sealing structure is opened, the rotation direction of the drive ring is opposite to the tilt direction of the ratchet teeth, and when the sealing structure is closed, the rotation direction of the drive ring is the same as the tilt direction of the ratchet teeth.

[0009] Furthermore, when the sealing structure is in a closed state, the torsion spring has a large torsional force.

[0010] Furthermore, an annular mounting groove is provided on the opposite surfaces of the transmission wheels on both sides, and the mounting groove is provided with:

[0011] A limiting ring, the limiting ring being fixedly mounted on the top end of the side wall of the fixing rod;

[0012] A tension spring, one end of which is fixedly connected to the bottom end of the mounting groove, and the other end of which is fixedly connected to the limiting ring;

[0013] The side wall of the fixing rod in contact with the transmission wheel is provided with an external thread, and the contact point between the transmission wheel and the fixing rod is provided with an internal thread. Both the external thread and the internal thread are intermittent, and the angles of the fixing rod and the transmission wheel with and without threads are the same.

[0014] Furthermore, the tension spring is always in a tensioned state, and the maximum tension of the tension spring is less than the squeezing force between the sealing rubbers on both sides when the sealing structure is closed.

[0015] Furthermore, each time the sealing structure is opened, the angle at which the transmission wheel rotates on the fixing rod is the same as the angle occupied by a section of the external thread.

[0016] This application has the following beneficial effects:

[0017] When the cam is in the air, the cam is pressed against the airtight container and the airtight seal is broken, so that the cam is pressed against the airtight container and the airtight seal is broken.

[0018] 2. The present application provides a sealing structure of a hook-type shot blasting machine, in which the sealing rubber is changed into a ring shape, fixed rods are fixedly installed at both ends of the sealing plate, a transmission wheel is movably sleeved on the fixed rod, the sealing rubber is sleeved on the transmission wheel, a connecting shaft sleeve, a driving ring and a torsion spring are sleeved on the fixed rod, the connecting shaft sleeve is fixedly connected to the transmission wheel, and both ends of the torsion spring are fixedly connected to the sealing plate and the driving ring, one end of the driving ring is sleeved on the outside of the connecting shaft sleeve, a ratchet is provided on the outside of the connecting shaft sleeve, a pawl is provided on the inside of the driving ring, a steel wire rope is fixedly connected to the outer wall of the driving ring, and the other end of the steel wire rope is fixedly connected to the top plate. In the process of opening the guide groove, the cylinder pulls the flap bracket, the sealing plate and the connecting ring The connecting piece moves to both sides. During the movement, the distance between the two end points of the wire rope decreases, and the wire rope loses its restrictive effect on the drive ring. Under the action of the torsion spring, the drive ring rotates, and the pawl of the drive ring pushes the ratchet, so that the ratchet drives the connecting sleeve, the transmission wheel and the sealing rubber to rotate, thereby changing the position of the sealing rubber. When the flap brackets, sealing plates and sealing rubber on both sides are closed, the position where the sealing rubber contacts the hook structure changes. When the hook structure rotates and wears the sealing rubber, the wear position of the sealing rubber changes, and it changes with each operation, so that the entire edge of the sealing rubber will be evenly worn, thereby increasing the service life of the sealing rubber.

[0019] 3. The sealing structure of a hook-type shot blasting machine provided in the present application is characterized in that an installation groove is opened in the transmission wheel, and a limiting ring in the installation groove is installed on the top of the side wall of the fixing rod. The limiting ring and the installation groove are connected by a tension spring. The contact point between the fixing rod and the transmission wheel is provided with an external thread, and the external thread is intermittent. The contact point between the transmission wheel and the external thread is provided with an intermittent internal thread matching the external thread. When opened, the driving ring drives the connecting shaft sleeve, the transmission wheel and the sealing rubber to rotate. At this time, the rotating transmission wheel and the external thread of the fixing rod generate thrust, thereby pushing the transmission wheel to move toward the guide groove. When closed, the sealing rubbers on both sides squeeze each other, and the squeezing force offsets the pulling force of the tension spring, thereby pushing the transmission wheel to move in the direction away from the guide groove, thereby resetting. When the sealing rubber is worn, the squeezing force of the two sealing rubbers becomes smaller, and the squeezing force offsets the pulling force of the tension spring and cannot push the transmission wheel to reset, thereby compensating for the worn sealing rubber, thereby extending the service life of the sealing rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments disclosed herein and, together with the description, serve to explain the principles disclosed herein.

[0021] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the installation of the sealing structure and hook structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the sealing structure in the first embodiment of the present invention when sealing;

[0025] Figure 4 This is a structural schematic diagram of the sealing structure in the first embodiment of the present invention when sealing from another perspective;

[0026] Figure 5 This is a schematic diagram of the sealing structure in the second embodiment of the present invention when sealing;

[0027] Figure 6 This is a schematic diagram of the internal structure of the sealing structure when sealing in the second embodiment of the present invention;

[0028] Figure 7 For the present invention Figure 6 A magnified view of the local structure at center A;

[0029] Figure 8 For the present invention Figure 7 Cross-sectional view at the middle BB;

[0030] Figure 9 For the present invention Figure 7 Cross-sectional view at CC;

[0031] Figure 10 Schematic diagram of the structure of the drive ring in the present invention;

[0032] Figure 11 This is a schematic structural diagram of the sealing structure when it is opened in the second embodiment of the present invention.

[0033] In the figure: 1. Shot blasting chamber; 2. Top plate; 201. Support rod; 3. Closed door; 4. Guide groove; 5. Sealing structure; 501. Vertical plate; 6. Hook structure; 7. Hinge; 8. Flap bracket; 801. Connecting ear; 9. Sealing plate; 901. Support plate; 10. Mounting block; 11. Cylinder; 12. Sealing rubber; 1201. Transmission groove; 13. Fixing rod; 1301. Limiting ring; 1302. External thread; 14. Transmission wheel; 1401. Mounting groove; 15. Connecting sleeve; 1501. Ratchet; 16. Drive ring; 1601. Pawl; 17. Torsion spring; 18. Wire rope; 19. Tension spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] Example 1

[0036] See also Figure 1 and Figure 2 A sealing structure of a hook-type shot blasting machine includes a shot blasting chamber 1, a closed door 3, a sealing structure 5 and a hook structure 6. A closed door 3 for closing the shot blasting chamber 1 is movably installed on one side of the shot blasting chamber 1, and a top plate 2 is fixedly installed on the top of the shot blasting chamber 1. A plurality of support rods 201 for strengthening the structural strength are fixedly installed on the outer walls of the shot blasting chamber 1 and the top plate 2. A guide groove 4 for moving the hook structure 6 is opened on the top of the top plate 2, and a sealing structure 5 for closing is provided on the upper side of the guide groove 4. A sliding track is fixedly provided above the top plate 2, and a hook structure 6 is slidably installed inside the sliding track. The hook structure 6 passes through the guide groove 4 and the sealing structure 5, and the bottom end of the hook structure 6 is in the shot blasting chamber 1.

[0037] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4The sealing structure 5 includes a vertical plate 501, a flap bracket 8, a sealing plate 9, a cylinder 11 and a sealing rubber 12. The vertical plates 501 are fixedly installed on both sides of the guide groove 4, and one side of the hinge 7 is fixedly installed at the middle position of the outer wall of the vertical plate 501. The flap bracket 8 is fixedly installed on the other side of the hinge 7. A connecting ear 801 is fixedly installed at the middle position of the top of the outer wall of the flap bracket 8. The cylinder 11 is movably connected to the connecting ear 801. The other end of the cylinder 11 is movably connected to the mounting block 10. The mounting block 10 is fixedly installed on the top of the top plate 2, and the two mounting blocks 10 are respectively located on both sides of the guide groove 4. A sealing plate 9 is fixedly installed on the inner side wall of the flap bracket 8. The sealing plate 9 is bent in an "L" shape. A sealing rubber 12 for sealing is provided on the lower end surface of the sealing plates 9 on both sides. One side of the sealing rubber 12 extends out of the sealing plate 9, and the sealing rubbers 12 extending out of the sealing plate 9 on both sides can contact each other.

[0038] The working principle of the first embodiment of the present invention is as follows:

[0039] See also Figure 1 、 Figure 2 、 Figure 3 and Figure 4 Before placing the workpiece into the shot blasting chamber 1, the cylinder 11 is driven, and the cylinder 11 pulls the flap bracket 8, sealing plate 9 and sealing rubber 12 on both sides of the guide groove 4 to move, thereby opening the sealing structure 5. At this time, the hook structure 6 slides to the middle position of the guide groove 4 through the sliding track, and the workpiece on the hook structure 6 is transported to the shot blasting chamber 1. At this time, the cylinder 11 pushes the flap bracket 8, sealing plate 9 and sealing rubber 12 on both sides to move toward each other, thereby closing the sealing structure 5; after the work is completed, in the process of moving the workpiece out of the shot blasting chamber 1, the cylinder 11 is first used to pull the flap bracket 8, sealing plate 9 and sealing rubber 12 on both sides of the guide groove 4 to move, thereby opening the sealing structure 5, and then the hook structure 6 slides out of the shot blasting chamber 1 through the sliding track, thereby taking out the workpiece. During this process, the hook structure 6 will not contact the sealing rubber 12, and the sealing rubber 12 will not be worn by the hook structure 6. In addition, the sealing rubber 12 can be made thicker. The thicker the sealing rubber 12, the better the sealing effect and the longer the service life. It can prevent the shot blasting from flying out of the guide groove 4. Even if the sealing rubber 12 is too thick and the hardness is too high, the sealing rubber 12 will not hinder the movement of the hook structure 6.

[0040] Example 2

[0041] The second embodiment is a further improvement on the basis of the first embodiment.

[0042] The difference from the first embodiment is that, please refer to Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 10, the sealing rubber 12 is set to be annular, and an annular transmission groove 1201 is opened in the middle position of the inner wall of the sealing rubber 12. Fixed rods 13 are fixedly installed at both ends of the inner wall of the sealing plate 9. The top movable sleeve of the side wall of the fixed rod 13 is provided with a transmission wheel 14. The outer movable sleeve of the transmission wheel 14 on the same sealing plate 9 is provided with a sealing rubber 12. The transmission wheel 14 is in the transmission groove 1201 of the sealing rubber 12. A support plate 901 is fixed at the bottom end of the upper wall of the sealing plate 9. A slide groove is formed between the support plate 901 and the upper plate of the sealing plate 9. One side of the sealing rubber 12 is slidably installed in the slide groove. A connecting sleeve 15, a drive ring 16 and a torsion spring 17 are sequentially provided between the transmission wheel 14 and the sealing plate 9. The connecting sleeve 15, the drive ring 16 and the torsion spring 17 are movably sleeved. On the outside of the fixed rod 13, one end of the connecting sleeve 15 is fixedly mounted on the side wall of the transmission wheel 14, and the other end of the connecting sleeve 15 is movably sleeved in the driving ring 16. The side wall annular array of the connecting sleeve 15 in the driving ring 16 is provided with a ratchet 1501, and the inner wall of the driving ring 16 is movably provided with a pawl 1601 used in conjunction with the ratchet 1501. One end of the torsion spring 17 is fixedly mounted on the end face of the driving ring 16, and the other end of the torsion spring 17 is fixedly mounted on the inner wall of the sealing plate 9. The torsion spring 17 is used to drive the driving ring 16 to rotate. The side wall of the driving ring 16 is fixedly connected with a steel wire rope 18. One end of the steel wire rope 18 passes through the flap bracket 8 and is fixedly connected to the upper end face of the top plate 2. The steel wire rope 18 is used to pull the driving ring 16 to rotate, so that the driving ring 16 is reset.

[0043] The connecting sleeve 15 and the transmission wheel 14 on the same sealing plate 9 rotate in the same direction, while the connecting sleeves 15 and the transmission wheel 14 on different sealing plates 9 rotate in opposite directions. This ensures that the sealing rubbers 12 on the same side can rotate in the same direction, and the sealing rubbers 12 on both sides rotate in opposite directions, so that the sealing rubbers 12 on both sides are in the same state after rotation.

[0044] When the sealing structure 5 is opened, the rotation direction of the drive ring 16 is opposite to the inclination direction of the ratchet 1501, and the pawl 1601 of the drive ring 16 pushes the ratchet 1501 and the connecting sleeve 15 to rotate; when the sealing structure 5 is closed, the rotation direction of the drive ring 16 is the same as the inclination direction of the ratchet 1501, and the pawl 1601 of the drive ring 16 slides over the ratchet 1501 of the connecting sleeve 15, and the connecting sleeve 15 does not rotate.

[0045] When the sealing structure 5 is closed, the torsion spring 17 exerts a large torsional force. This torsional force powers the rotation of the drive ring 16. When the sealing structure 5 is opened, the distance between the two ends of the wire rope 18 decreases, and the wire rope 18 loses its restraining effect on the drive ring 16, allowing the torsional force of the torsion spring 17 to drive the drive ring 16 to rotate.

[0046] The working principle of the second embodiment of the present invention is as follows:

[0047] See also Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 10 and Figure 11 Under normal circumstances, the sealing structure 5 is in a closed state. When in use, the cylinder 11 pulls the flap bracket 8, the sealing plate 9 and the sealing rubber 12 to move to both sides, thereby opening the sealing structure 5. In the process of opening the sealing structure 5, the sealing plate 9 moving to both sides drives the fixing rod 13, the transmission wheel 14, the connecting shaft sleeve 15, the driving ring 16 and the torsion spring 17 to move, thereby reducing the distance between the two ends of the wire rope 18, and the wire rope 18 loses the restrictive effect of the driving ring 16. At this time, under the action of the torque force of the torsion spring 17, the torsion spring 17 twists the driving ring 16, causing the driving ring 16 to rotate. The direction of rotation of the driving ring 16 is opposite to the inclination direction of the ratchet 1501, and the ratchet 1601 inside the driving ring 16 pushes the ratchet 1501 and the connecting shaft sleeve 15 to rotate in the same direction. The connecting sleeve 15 drives the transmission wheel 14 to rotate, and the transmission wheel 14 drives the sealing rubber 12 to rotate, so that the position of the sealing rubber 12 changes to a certain extent. After the hook structure 6 puts the workpiece into the shot blasting chamber 1 and closes the sealing structure 5, the contact position of the hook structure 6 and the sealing rubber 12 changes. During operation, the rotating hook structure 6 rubs against the new position of the sealing rubber 12. Each opening and closing of the sealing structure 5 changes the position of the sealing rubber 12 to a certain extent, thereby changing the friction position of the hook structure 6 and the sealing rubber 12, so that the edge of the sealing rubber 12 can participate in the process of wear with the hook structure 6, so that the entire edge of the sealing rubber 12 will be evenly worn, thereby increasing the service life of the sealing rubber 12.

[0048] Example 3

[0049] The third embodiment is a further improvement on the basis of the second embodiment.

[0050] The difference from the second embodiment is that please refer to Figure 5 、 Figure 6 、 Figure 7 and Figure 9, annular mounting grooves 1401 are provided on the opposite surfaces of the transmission wheels 14 on both sides, and the mounting grooves 1401 are located on the outside of the fixed rod 13. A limiting ring 1301 is fixedly installed on the top of the side wall of the fixed rod 13, and the limiting ring 1301 is in the mounting groove 1401. A tension spring 19 is provided in the mounting groove 1401, and one end of the tension spring 19 is fixedly connected to the bottom end of the mounting groove 1401, and the other end of the tension spring 19 is fixedly connected to the limiting ring 1301. The side wall of the fixed rod 13 in contact with the transmission wheel 14 is provided with an external thread 1302, and the contact point between the transmission wheel 14 and the fixed rod 13 is provided with an internal thread. Both the external thread 1302 and the internal thread are intermittent, and the angles of the threads on the fixed rod 13 and the transmission wheel 14 are the same as those on the non-threaded ones.

[0051] When the sealing structure 5 is closed twice, the external thread 1302 of the fixing rod 13 and the internal thread of the transmission wheel 14 are offset once, allowing the transmission wheel 14 to move axially along the fixing rod 13. When the sealing rubbers 12 on both sides squeeze each other and no compensation is required, the sealing rubbers 12 can push the transmission wheel 14 to return to its original position.

[0052] When the drive ring 16 drives the connecting sleeve 15 and the transmission wheel 14 to rotate, the transmission wheels 14 on both sides move toward each other. As the transmission wheels 14 rotate around the fixed rod 13, the internal threads of the transmission wheel 14 and the external threads 1302 of the fixed rod 13 are squeezed against each other, causing the transmission wheel 14 to move toward the top of the fixed rod 13. In turn, the transmission wheel 14 drives the sealing rubber 12 to move, compensating for wear on the side of the sealing rubber 12.

[0053] The tension spring 19 is always in a tensioned state, and the maximum tension of the tension spring 19 is less than the squeezing force between the sealing rubbers 12 on both sides when the sealing structure 5 is closed. When the sealing structure 5 is closed, the sealing rubbers 12 on both sides squeeze each other. When the squeezing force between the sealing rubbers 12 is greater than the tension of the tension spring 19, the squeezing force of the sealing rubbers 12 pushes the transmission wheel 14 and the connecting sleeve 15 to reset (i.e., the external thread 1302 of the fixing rod 13 and the internal thread of the transmission wheel 14 are in a staggered state, and the transmission wheel 14 can move axially in the fixing rod 13). The sealing rubber 12 does not need to compensate for wear. When the side of the sealing rubber 12 is severely worn, the squeezing force of the sealing rubbers 12 on both sides is reduced, and the squeezing force of the sealing rubber 12 cannot offset the tension of the tension spring 19. The transmission wheel 14 will not be pushed back, thereby compensating for the sealing rubber 12, so that the sealing rubber 12 can continue to seal.

[0054] Each time the sealing structure 5 is opened, the angle at which the transmission wheel 14 rotates on the fixing rod 13 is the same as the angle occupied by a section of the external thread 1302. The transmission wheel 14 is ensured to rotate twice, at which time the internal thread of the transmission wheel 14 and the external thread 1302 of the fixing rod 13 are in a staggered state.

[0055] The working principle of the second embodiment of the present invention is as follows:

[0056] See also Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 11 In the process of using the cylinder 11 to open the sealing structure 5, due to the reduction in the distance between the two ends of the wire rope 18, the wire rope 18 loses the limiting effect of the drive ring 16. At this time, under the action of the torque of the torsion spring 17, the torsion spring 17 twists the drive ring 16, causing the drive ring 16 to rotate. The direction of rotation of the drive ring 16 is opposite to the inclination direction of the ratchet 1501. The ratchet 1601 inside the drive ring 16 pushes the ratchet 1501 and the connecting sleeve 15 to rotate in the same direction. The connecting sleeve 15 drives the transmission wheel 14 to rotate, and the rotating transmission wheel 14 drives the internal thread to rotate. The internal thread of the transmission wheel 14 cooperates with the external thread 1302 of the fixed rod 13, so that the transmission wheels 14 on both sides drive the sealing rubber 12 to move toward each other, thereby compensating for the wear on the edge of the sealing rubber 12; if the degree of wear on the edge of the sealing rubber 12 is small and no compensation is required, the sealing rubbers 12 on both sides of the sealing structure 5 in the closed state squeeze each other, and the squeezing force of the sealing rubber 12 on both sides is greater than the extrusion force of the tension spring 19 on the transmission The pulling force of the driving wheel 14 and the squeezing force of the sealing rubbers 12 on both sides will push the sealing rubber 12 and the driving wheel 14 to move in opposite directions, and every two times the driving wheel 14 is opened, there will be one time when the internal thread of the driving wheel 14 and the external thread 1302 of the fixing rod 13 are in a staggered state. When in the staggered state, the squeezing force of the sealing rubber 12 will push the driving wheel 14 and the sealing rubber 12 to reset, canceling the wear compensation; if the wear degree of the edge of the sealing rubber 12 is large and compensation is required, when the sealing structure 5 is closed, the distance moved by the cylinder 11 is fixed, and the squeezing force between the sealing rubbers 12 on both sides will become smaller, and the squeezing force of the sealing rubbers 12 on both sides cannot offset the pulling force of the tension spring 19 on the driving wheel 14, and the driving wheel 14 will not be pushed by the squeezing force between the sealing rubbers 12, so that the compensation will not be cancelled. The wear of the edge of the sealing rubber 12 is compensated by this repeated compensation method, thereby extending the service life of the sealing rubber 12.

Claims

1. A sealing structure of a hook-type shot blasting machine, comprising a shot blasting chamber (1), a sealing structure (5) and a hook structure (6), wherein a top plate (2) having a guide groove (4) is fixedly mounted on the top of the shot blasting chamber (1), and the sealing structure (5) is arranged at the upper end of the guide groove (4), characterized in that: The sealing structure (5) comprises: A vertical plate (501), the vertical plate (501) is fixedly mounted on both sides of the guide groove (4), and a hinge (7) is fixedly mounted at the middle position of the outer side wall of the vertical plate (501); A flap bracket (8), one side of the flap bracket (8) is fixedly mounted on the hinge (7), and a connecting ear (801) is fixedly mounted at the middle position of the top end of the outer wall of the flap bracket (8); A cylinder (11), one end of the cylinder (11) is movably connected to the connecting ear (801), and the other end of the cylinder (11) is movably connected to a mounting block (10), and the mounting block (10) is fixedly mounted on both sides of the top of the top plate (2); A sealing plate (9), wherein the sealing plate (9) is fixedly mounted on the inner side of the flap bracket (8), and the sealing plate (9) is in a bent "L" shape; A sealing rubber (12), the sealing rubber (12) being arranged on the lower end surface of the sealing plate (9), one side of the sealing rubber (12) extending out of the sealing plate (9), the extended sealing rubber (12) being used to seal the guide groove (4); The sealing rubber (12) is provided in an annular shape. A support plate (901) is fixedly provided at the bottom end of the upper wall of the sealing plate (9). A slide groove is formed between the support plate (901) and the upper plate of the sealing plate (9). Fixed rods (13) are fixedly installed at both ends of the inner wall of the sealing plate (9). The fixed rods (13) are provided with: A transmission wheel (14), the transmission wheel (14) is movably sleeved on the top end of the side wall of the fixed rod (13), and a sealing rubber (12) is movably sleeved on the outer side of the transmission wheel (14) on the same sealing plate (9), and one side of the sealing rubber (12) is slidably installed in the slide groove; A connecting sleeve (15), a driving ring (16) and a torsion spring (17), wherein the connecting sleeve (15), the driving ring (16) and the torsion spring (17) are sequentially arranged between the transmission wheel (14) and the sealing plate (9), and the movable sleeve is arranged outside the fixed rod (13); One end of the connecting sleeve (15) is fixedly mounted on the side wall of the transmission wheel (14), and the other end of the connecting sleeve (15) is movably mounted in the driving ring (16). The side wall annular array of the connecting sleeve (15) in the driving ring (16) is provided with ratchet teeth (1501), and the inner wall of the driving ring (16) is movably provided with a pawl (1601) used in conjunction with the ratchet teeth (1501). One end of the torsion spring (17) is fixedly mounted on the end surface of the driving ring (16), and the other end of the torsion spring (17) is fixedly mounted on the inner wall of the sealing plate (9); A steel wire rope (18) is fixedly connected to the side wall of the driving ring (16), and one end of the steel wire rope (18) passes through the flap bracket (8) and is fixedly connected to the upper end surface of the top plate (2).

2. The sealing structure of a hook-type shot blasting machine according to claim 1, characterized in that: The connecting sleeve (15) and the transmission wheel (14) on the same sealing plate (9) rotate in the same direction, while the connecting sleeve (15) and the transmission wheel (14) on different sealing plates (9) rotate in opposite directions.

3. The sealing structure of a hook-type shot blasting machine according to claim 1, characterized in that: When the sealing structure (5) is opened, the rotation direction of the drive ring (16) is opposite to the tilt direction of the ratchet (1501); when the sealing structure (5) is closed, the rotation direction of the drive ring (16) is the same as the tilt direction of the ratchet (1501).

4. The sealing structure of a hook-type shot blasting machine according to claim 1, characterized in that: When the sealing structure (5) is in a closed state, the torsion spring (17) has a large torsional force.

5. The sealing structure of a hook-type shot blasting machine according to claim 1, characterized in that: Annular mounting grooves (1401) are provided on the opposite surfaces of the transmission wheels (14) on both sides, and the mounting grooves (1401) are provided with: A limiting ring (1301), wherein the limiting ring (1301) is fixedly mounted on the top end of the side wall of the fixing rod (13); A tension spring (19), one end of the tension spring (19) is fixedly connected to the bottom end of the mounting groove (1401), and the other end of the tension spring (19) is fixedly connected to the limiting ring (1301); The side wall of the fixing rod (13) in contact with the transmission wheel (14) is provided with an external thread (1302), and the contact portion between the transmission wheel (14) and the fixing rod (13) is provided with an internal thread, the external thread (1302) and the internal thread are both intermittent, and the angles of the fixing rod (13) and the transmission wheel (14) where the threads are present are the same as the angles where the threads are not present.

6. The sealing structure of a hook-type shot blasting machine according to claim 5, characterized in that: The tension spring (19) is always in a tensioned state, and the maximum tension of the tension spring (19) is less than the squeezing force between the sealing rubbers (12) on both sides when the sealing structure (5) is closed.

7. The sealing structure of a hook-type shot blasting machine according to claim 5, characterized in that: Each time the sealing structure (5) is opened, the angle at which the transmission wheel (14) rotates on the fixing rod (13) is the same as the angle occupied by a section of the external thread (1302).

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