Chain wheel protective cover for spiral conveying

Abstract

The utility model discloses a chain wheel protective cover for spiral conveying, which comprises a surrounding cover, a chain wheel, a chain wheel, a chain wheel, a chain wheel, a chain wheel and a chain wheel, at least corresponding to the outer port, the surrounding cover is provided with a flanging or a lug plate which is folded towards the inside of the port; mounting holes are formed in the turned-over edges or the lug plates; the outer sealing plate is mounted on the enclosure cover through an outer connecting hole aligned with the corresponding mounting hole; if the inner port is correspondingly provided with a flange or a lug plate, an inner sealing plate is correspondingly arranged, the inner sealing plate is mounted on the enclosure cover through an inner connecting hole aligned with the corresponding mounting hole, and a via hole aligned with the chain wheel is formed in the inner sealing plate. According to the chain wheel protective cover, the appearance is relatively attractive, and the assembly precision is easy to guarantee.

Description

Technical Field

[0001] The utility model relates to a sprocket protective cover of a sprocket transmission part of a screw conveying mechanism. Background Art

[0002] In the field of shot blasting machinery, a device for recovering shot is often provided at the bottom of the shot blasting room, which is generally a bucket structure. A screw conveyor is provided at the bucket outlet (located at the lower end) to transport the shot to a predetermined location, such as a shot elevator.

[0003] The screw conveyor can be installed with a power machine in a direct connection manner, such as the screw conveyor shaft is directly connected to the motor or electric reduction integrated machine through a coupling; and in some implementations, the screw conveyor is connected to the power machine using a transmission mechanism with an intermediate flexible part, because the flexible part has a certain buffering performance and has relatively good adaptability to changes in flow. In the field of shot blasting machine technology, the transmission mechanism with an intermediate flexible part used to drive the screw conveyor is generally a chain transmission mechanism. Although the chain drive mechanism is installed outside the shot blasting room and there is no need to consider the damage to it caused by the dirty environment in the shot blasting room, due to its relatively fast running speed, it is necessary to consider the occurrence of injuries that may be caused by this type of chain drive mechanism. Therefore, it is necessary to configure a protective cover for the chain drive mechanism. For the convenience of description, the sprocket guard equipped with the screw conveyor in the shot blasting machine is referred to as the sprocket guard in the following text.

[0004] Sprocket guards generally adopt a welded structure. One of the inherent defects of the welded structure is that even if reliable positioning is adopted between the two parts connected by welding before welding, the two parts will be displaced due to the contact caused by welding, so it is difficult to control the assembly accuracy of the assembly formed by welding. At the same time, welding is easy to cause slight deformation of the parts, which may not be easy to detect visually, but for example, when the sprocket guard is assembled in the body by bolts, the deformation caused by welding may cause the position of the pre-opened bolt holes to be misaligned, thereby affecting the subsequent assembly. Therefore, the sprocket guard with a welded structure often opens the assembly hole after the sprocket guard is formed. At this time, since the various parts that make up the sprocket guard are welded in place, the operating space for opening the hole is relatively small, which affects the efficiency of opening the hole, and even makes it extremely difficult to open the hole in some positions.

[0005] In addition, welding is prone to produce welds, which will affect the overall aesthetics of the equipment. Even if the sprocket guard is covered with paint after it is formed as a whole, the corresponding paint layer is generally thin and can only cover relatively minor defects on the sprocket guard, but cannot cover the welds. Utility Model Content

[0006] The utility model aims to provide a sprocket protective cover for spiral conveying which has a relatively beautiful appearance and can easily ensure assembly accuracy.

[0007] In an embodiment of the present invention, a sprocket protective cover for a spiral conveyor is provided, the sprocket protective cover comprising:

[0008] The enclosure is a cover body surrounding the circumference of the corresponding chain transmission mechanism, and has an inner port for the sprocket shaft to intervene and an outer port opposite to the inner port; the enclosure has at least a flange or ear plate folded inwardly corresponding to the outer port; and a mounting hole is opened on the flange or ear plate;

[0009] An outer sealing plate is mounted on the enclosure through an outer connection hole aligned with the corresponding mounting hole;

[0010] If the inner port is provided with a flange or ear plate, an inner sealing plate is provided accordingly. The inner sealing plate is installed on the enclosure through an inner connecting hole aligned with the corresponding mounting hole, and the inner sealing plate is provided with a through hole aligned with the sprocket.

[0011] Optionally, the outer sealing plate is a mesh plate or an end plate;

[0012] When the outer sealing plate is an end plate, a window or observation hole is opened at the location of the sprocket, and the window is formed by installing a transparent window on a predetermined bottom hole.

[0013] Optionally, the observation holes are arc holes in a ring array or a porous plate portion formed in an area greater than or equal to the diameter of the sprocket;

[0014] The array axis of the circular array of arc-shaped holes is the sprocket axis;

[0015] The width of the arc hole is greater than or equal to 0.5 cm and less than or equal to 1.5 cm.

[0016] Optionally, the inner sealing plate is an assembly plate, which includes a rectangular inner sealing plate body and a left sealing plate and a right sealing plate respectively located at two ends of the inner sealing plate body;

[0017] The left sealing plate and the main body of the inner sealing plate are aligned at the left joint seam, and the right sealing plate and the main body of the inner sealing plate are aligned at the right joint seam;

[0018] The left joint seam passes through the corresponding left sprocket shaft axis and is perpendicular to the center line connecting the two sprocket shafts; the right joint seam passes through the corresponding right sprocket shaft axis and is perpendicular to the center line connecting the two sprocket shafts.

[0019] Optionally, both the left sealing plate and the right sealing plate are connected to the enclosure by at least three connecting members.

[0020] Optionally, the enclosure has a main body formed of a straight plate and wrapping parts located at both ends of the main body;

[0021] The wrapping portion is an arc-shaped plate or a semi-polygonal prism plate.

[0022] Optionally, the semi-polygonal prism plate comprises 5 to 10 edges, and 4 to 9 side faces are determined.

[0023] Optionally, the side surfaces included in the same half-polygonal prism plate have the same width.

[0024] Optionally, a bracket for mounting the enclosure is further included, the bracket comprising a first bracket located at the first end of the enclosure and a second bracket located at the second end of the enclosure.

[0025] Optionally, the enclosure is tilted so that the first end constitutes the lower end and the second end constitutes the upper end;

[0026] The first bracket supports the enclosure from the lower side, the second bracket is located on the upper side of the upper end of the enclosure, and a third bracket is provided, which is located on the upper end of the flat plate offset on the upper side.

[0027] In an embodiment of the utility model, the provided spiral conveyor sprocket protective cover is connected via mounting holes opened on the enclosure and connecting holes opened on the inner and outer sealing plates. The connection via the holes may be riveted or screwed. Both connection methods easily ensure that the assembly formed by the enclosure and the inner and outer sealing plates has good assembly accuracy. Compared with welding, both riveted and screwed connections have a relatively regular appearance and are relatively aesthetically pleasing. Moreover, both riveted and screwed connections will not produce relatively large connection deformation, which is conducive to ensuring the assembly formed by the enclosure and the inner and outer sealing plates, that is, the dimensional accuracy of the sprocket protective cover as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main structure of the enclosure in one embodiment.

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the enclosure in one embodiment.

[0030] Figure 3 It is a schematic diagram of the main structure of the inner sealing plate body in one embodiment.

[0031] Figure 4 It is a schematic diagram of the left and right sealing plate structures of the inner sealing plate.

[0032] Figure 5 This is a schematic diagram of the three-dimensional structure of the inner side of the sprocket protective cover (bracket omitted) for spiral conveying in one embodiment.

[0033] Figure 6 This is a schematic diagram of the outer three-dimensional structure of a sprocket protective cover (bracket omitted) for spiral conveying in one embodiment.

[0034] Figure 7 This is a schematic diagram of the installation status of the spiral conveyor sprocket protective cover (oblique) in one embodiment.

[0035] Figure 8 It is a schematic diagram of the top view of the spiral conveyor sprocket protective cover in one embodiment.

[0036] Fig. 9 Schematic diagram of the first bracket structure in one embodiment.

[0037] Fig.10 Schematic diagram of the third bracket structure in one embodiment.

[0038] Fig.11 Schematic diagram of the second bracket structure in one embodiment.

[0039] In the figure: 1. bending head, 2. main body, 3. flange, 4. mounting hole, 5. second fixing hole, 6. third fixing hole, 7. third fixing hole, 8. left half hole, 9. inner sealing plate main body, 10. first connecting hole, 11. left sealing plate, 12. left sealing plate half hole, 13. second connecting hole, 14. right sealing plate half hole, 15. third connecting hole, 16. right sealing plate, 17. inner sealing plate, 18. sprocket hole, 19. observation hole, 20. outer sealing plate, 21. first bracket, 22. second bracket, 23. third bracket, 24. bolt, 25. nut, 26. seat hole, 27. seat plate, 28. column, 29. first elongated hole, 30. second elongated hole, 31. third elongated hole, 32. fourth elongated hole, 33. fifth elongated hole. DETAILED DESCRIPTION

[0040] As for the sprocket guard, it should be known that its basic layout determines that one side of the sprocket guard faces the user and the other side faces the machine body. Although in some applications, the sprocket guard may face the user on both sides, the sprocket shaft often intervenes in the sprocket guard from one side. In other words, the intervention side can be called the inner side, and the opposite side is the outer side. In order to avoid the occurrence of injuries, the sprocket guard is provided with a sealing plate or a guard plate at least on the outer tight side (generally the upper chain side) to prevent workers from directly contacting the sprocket or the transmission chain.

[0041] Since the sprocket guard has the characteristic of extending in the direction of the sprocket centerline, it has the typical feature of having two ends.

[0042] The sprocket protection cover for the screw conveyor is generally a sheet metal part as a whole, so for some components, such as the enclosure, it can be made by, for example, a steel plate bending device, and then the enclosure is formed by, for example, welding at the joint. The welding part can be selected, for example, at a certain place of the bending head 1, and the number of welds is small and short. In other words, although the welding structure is also used in the embodiment of the utility model, it has little impact on the overall visual effect.

[0043] The enclosure can also be called an enclosure shell, which is used to surround the transmission chain at the periphery of the transmission chain, that is, its basic form must be similar to the chain ring of the transmission chain (without considering the deflection of the transmission chain), and it extends outwards a certain distance relative to the transmission chain to avoid interference with the transmission chain. Obviously, this certain distance belongs to the content of conventional design and will not be repeated here.

[0044] The enclosure can be understood as a cylindrical enclosure as a whole, but has a certain width, which is related to the axial extension distance of the sprocket on the sprocket, and the installation position of the enclosure at the inner end needs to be considered. Since the design basis is clear and belongs to general knowledge in this field, it will not be elaborated here.

[0045] Based on the aforementioned reference system, the enclosure is a cylindrical enclosure having an inner port and an outer port, wherein the inner port is a port where the sprocket shaft is introduced, and the outer port is opposite to the inner port.

[0046] In order to install the inner sealing plate 17 and the outer sealing plate 20 on the enclosure, the enclosure has at least a flange 3 or an ear plate folded inwardly corresponding to the outer port; accordingly, a mounting hole 4 is opened on the flange 3 or the ear plate.

[0047] The flange 3 not only serves as a mounting base for the inner sealing plate 17 or the outer sealing plate 20, but also can strengthen the enclosure.

[0048] The ear plate is a relatively concise structure, and the manufacturing process is simpler than the flange 3. The flange 3 is easy to wrinkle due to its wide range and the curved surface located at the bending head 1. However, the existing process is sufficient to avoid the occurrence of such defects, but it is relatively complicated compared to the ear plate.

[0049] The ear plates and the mounting holes 4 only need to correspond one to one. If a group arrangement of two mounting holes 4 is adopted, two mounting holes 4 can be set on one ear plate.

[0050] The inner sealing plate 17 is optional. If the side where the inner opening of the enclosure is located is accessible to workers or can be touched during normal use, it is preferably equipped with an inner sealing plate 17.

[0051] Different from the outer sealing plate 20, the inner sealing plate 17 has a slot for the sprocket to pass through or at least for the sprocket shaft to pass through. Figure 5 The sprocket hole 18 is shown.

[0052] For example, the sprocket hole 18 is mainly used for the intervention of the sprocket shaft. At the same time, in some implementations, the sprocket can be installed first, and then the sprocket guard can be installed. At this time, the outer sealing plate 20 of the sprocket guard can be removed first, and then the drive chain can be installed. After the drive chain is installed, the outer sealing plate 20 can be installed.

[0053] The inner sealing plate 17 and the outer sealing plate 20 are respectively provided with connecting holes for aligning and connecting with the mounting holes 4 on the flange 3, for example. The connecting parts are assembled by screws or rivets.

[0054] When screw connection is adopted, the mounting hole 4 is a threaded hole.

[0055] When riveting is adopted, the connection hole and the mounting hole 4 are both smooth holes.

[0056] In order to facilitate observation of the operation of the transmission chain, the outer sealing plate 20 is a mesh plate or an end plate, wherein the mesh plate is a sealing plate with mesh holes, and the end plate is used to represent a sealing plate without mesh holes, that is, a solid plate. Although the mesh plate has many holes, it still has a good shielding effect to prevent people from directly contacting the chain transmission mechanism.

[0057] The end plate has a visual shielding effect. Therefore, when the outer sealing plate 20 is an end plate, a window or observation hole 19 is opened at the location of the sprocket. The window is formed by installing a transparent window on a predetermined bottom hole.

[0058] exist Figure 6 and Figure 7 In the illustrated structure, the observation holes 19 are arc holes in a circular array. The observation holes 19 can also be a porous plate portion formed in an area greater than or equal to the sprocket diameter. The porous plate portion can be partially formed on the outer sealing plate 20 using a punching process.

[0059] For the observation holes 19 with arc-shaped hole structure, the array mode can be seen in Figure 6 In the structure described above, the observation holes 19 can be distributed on a plurality of rings, which are concentric. The concentricity is the array axis, which is the sprocket axis.

[0060] Regarding the width of the arc-shaped hole, ie the radial dimension, the width is greater than or equal to 0.5 cm and less than or equal to 1.5 cm to prevent workers from inserting their fingers through the observation hole 19.

[0061] As mentioned above, the necessity of setting the inner sealing plate 17 depends on whether the inside needs to be protected, that is, whether workers will contact the chain drive mechanism from the inside during normal production activities. Under this condition, there must be operating space on the inside. In other words, under this condition, if the inner sealing plate 17 can be removed, the sprocket guard can be installed when the chain drive mechanism has been formed.

[0062] Furthermore, at this time, the inner sealing plate 17 is an assembly plate, that is, it is assembled from multiple plates, so the inner sealing plate 17 can be removed during installation or maintenance. Figure 3 and Figure 4 As shown, the assembly plate includes a rectangular inner sealing plate body 9 and a left sealing plate 11 and a right sealing plate 16 located at two ends of the inner sealing plate body 9, that is, a three-component assembly structure is formed.

[0063] Among them, the left sealing plate 11 and the inner sealing plate body 9 are aligned at the left joint seam, and the right sealing plate 16 and the inner sealing plate body 9 are aligned at the right joint seam; the left joint seam and the right joint seam are real seams and are also used as position features here.

[0064] The left joint seam passes through the corresponding left sprocket shaft axis and is perpendicular to the centerline of the two sprocket shafts; the right joint seam passes through the corresponding right sprocket shaft axis and is perpendicular to the centerline of the two sprocket shafts. It can be seen that in this structure, the sprocket hole 18 is divided into two parts. Figure 3 and Figure 4 This is clearly shown in the text, so I won’t go into details here.

[0065] Since the sprocket hole 18 is divided into two parts, the inner sealing plate 17 can still be installed under the condition that the chain transmission mechanism is formed, thereby improving maintainability.

[0066] from Figure 5 As can be seen in the figure, both the left sealing plate 17 and the right sealing plate 20 are connected to the enclosure by at least three connecting members, thereby forming a reliable connection structure.

[0067] Referring to the structure of the chain ring in the chain transmission mechanism, the chain ring includes a chain edge and a wrapping portion, and the enclosure has a main body 2 formed of a straight plate and wrapping portions located at both ends of the main body 2. Just as the chain edge has a tight edge and a loose edge, the main body 2 has two pieces, thereby forming a Figure 1 The ring structure shown in .

[0068] The wrapping part can be an arc plate or a semi-polygonal plate. The arc plate is easy to make and is compatible with the chain ring wrapping part, so the size can be smaller. The semi-polygonal plate has a straight side, so that other components, such as a bracket, can be installed.

[0069] Furthermore, the number of edges included in the semi-polygonal prism plate is 5 to 10, and 4 to 9 side surfaces are determined, such as Figure 2 The bending head 1 shown in FIG. 1 has six edges and defines five side surfaces.

[0070] Regarding the bending process, continuous bending is often used, so the width of the side surfaces contained in the same semi-polygonal prism plate is the same, which has better processability.

[0071] exist Figure 7 and Figure 8 In the embodiment, the sprocket guard also includes a bracket for mounting the enclosure, and the bracket includes a first bracket 21 located at the first end of the enclosure and a second bracket 22 located at the second end of the enclosure. As mentioned above, the enclosure has two ends, and the first end and the second end are obviously opposite ends, that is, the sprocket guard is mounted from both ends, and the reliability is relatively good.

[0072] Regarding the chain transmission mechanism, the sprocket centerline is mostly arranged horizontally to avoid the chain ring part on the sprocket at the lower end being disengaged from the sprocket when the chain transmission mechanism is inclined.

[0073] However, in some applications, tilting is an inevitable choice. In this case, the enclosure is tilted so that the first end constitutes the lower end and the second end constitutes the upper end.

[0074] The first bracket 21 supports the enclosure from the lower side, the second bracket 22 is located on the upper side of the enclosure upper end, and a third bracket 23 is provided. The third bracket 23 is located on the upper end of the flat plate offset on the upper side to improve the reliability of the sprocket protective cover.

Claims

1. A sprocket protective cover for spiral conveyor, characterized in that: include: The enclosure is a cover body surrounding the circumference of the corresponding chain transmission mechanism, and has an inner port for the sprocket shaft to intervene and an outer port opposite to the inner port; the enclosure has at least a flange or ear plate folded inwardly corresponding to the outer port; and a mounting hole is opened on the flange or ear plate; An outer sealing plate is mounted on the enclosure through an outer connection hole aligned with the corresponding mounting hole; If the inner port is provided with a flange or ear plate, an inner sealing plate is provided accordingly. The inner sealing plate is installed on the enclosure through an inner connecting hole aligned with the corresponding mounting hole, and the inner sealing plate is provided with a through hole aligned with the sprocket.

2. The sprocket protective cover for screw conveyor according to claim 1, characterized in that: The outer sealing plate is a mesh plate or an end plate; When the outer sealing plate is an end plate, a window or observation hole is opened at the location of the sprocket, and the window is formed by installing a transparent window on a predetermined bottom hole.

3. The sprocket protective cover for spiral conveying according to claim 2, characterized in that: The observation holes are arc holes in a circular array or a porous plate portion formed in an area greater than or equal to the diameter of the sprocket; The array axis of the circular array of arc-shaped holes is the sprocket axis; The width of the arc hole is greater than or equal to 0.5 cm and less than or equal to 1.5 cm.

4. The sprocket protective cover for screw conveyor according to claim 1, characterized in that: The inner sealing plate is an assembly plate, which includes a rectangular inner sealing plate body and a left sealing plate and a right sealing plate respectively located at two ends of the inner sealing plate body; The left sealing plate and the main body of the inner sealing plate are aligned at the left joint seam, and the right sealing plate and the main body of the inner sealing plate are aligned at the right joint seam; The left joint seam passes through the corresponding left sprocket shaft axis and is perpendicular to the center line connecting the two sprocket shafts; the right joint seam passes through the corresponding right sprocket shaft axis and is perpendicular to the center line connecting the two sprocket shafts.

5. The sprocket protective cover for screw conveyor according to claim 4, characterized in that: The left sealing plate and the right sealing plate are both connected to the enclosure by at least three connecting pieces.

6. The sprocket protective cover for screw conveyor according to claim 1, characterized in that: The enclosure comprises a main body formed of a straight plate and wrapping parts located at both ends of the main body; The wrapping portion is an arc-shaped plate or a semi-polygonal prism plate.

7. The sprocket protective cover for screw conveyor according to claim 6, characterized in that: The semi-polygonal prism plate includes 5 to 10 edges and 4 to 9 side faces.

8. The sprocket protective cover for screw conveyor according to claim 7, characterized in that: The widths of the sides contained in the same half-polygonal prism plate are the same.

9. The sprocket protective cover for screw conveyor according to claim 6, characterized in that: Also included is a bracket for mounting the enclosure, the bracket comprising a first bracket located at the first end of the enclosure and a second bracket located at the second end of the enclosure.

10. The sprocket protective cover for screw conveyor according to claim 9, characterized in that: The enclosure is tilted so that the first end constitutes the lower end and the second end constitutes the upper end; The first bracket supports the enclosure from the lower side, the second bracket is located on the upper side of the upper end of the enclosure, and a third bracket is provided, which is located on the upper end of the flat plate offset on the upper side.

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