Composite spiral mesh belt conveying equipment
By using a self-supporting main drive and an independent return mechanism, the problems of high friction and oil accumulation on the guide rail in spiral mesh belt drives are solved, achieving low power consumption and low failure rate in food conveying.
Patent Information
- Application Number
- CN202410595838.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-11-14
AI Technical Summary
Existing spiral belt drives in food conveying machinery suffer from problems such as high friction, difficulty in cleaning oil and dirt accumulation on guide rails, frequent mechanical failures, and reduced production efficiency and food hygiene and safety.
It adopts a self-supporting main drive mechanism, an auxiliary conveyor belt mechanism, and an auxiliary return belt mechanism. Through friction drive and an independent return belt mechanism, it eliminates the traditional inner support track of the drum, reduces frictional resistance, prevents belt deviation and contamination, and achieves low-power transmission.
It effectively reduces frictional resistance, minimizes mechanical failures, improves production efficiency and food hygiene and safety, and simplifies cleaning challenges.
Smart Images
Figure CN120942822A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of food conveying equipment technology, specifically a composite spiral mesh belt conveyor. Background Technology
[0002] Currently, spiral belt drives are commonly used in food conveying machinery, especially in quick-freezing and steaming / baking machines. Spiral belt drive refers to the conveyor belt moving along a spiral trajectory to transport goods. The most common spiral belt drive system primarily uses a drum drive with a belt tensioning device as a secondary component. The conveyor belt is spirally distributed along the axial direction and wound around the drum surface. A geared motor drives the drum to rotate, and the conveyor belt moves spirally along the drum and guide rails through friction. The auxiliary tensioning device applies tension to the outer edge of the conveyor belt and compression to its interior. However, under actual operating conditions, when the conveyor belt spirals around the drum, significant frictional forces are generated between the drum and the belt. This frictional force increases the belt stress. Simultaneously, problems such as overload, speed mismatch between the tensioning motor and the drum motor, icing of the spiral track, or severe oil accumulation on the track can lead to excessive deformation of the drum, causing serious mechanical failures such as belt misalignment, belt stacking, belt overturning, and even belt tearing, significantly impacting production efficiency. Secondly, spiral guide rails used to support spiral conveyor belts typically have two or more spiral supports, especially for steamed, baked, and quick-frozen fried foods. Oil and dirt will accumulate on the guide rails, making them difficult to clean. The contact between the guide rails and the mesh belt generates a great deal of friction, resulting in increased operating power and affecting food hygiene and safety. Summary of the Invention
[0003] The purpose of this invention is to propose a composite spiral mesh belt conveyor to address the following issues in the prior art: Under actual working conditions, when the conveyor belt moves spirally around the drum, a very large frictional force is generated between the drum and the belt. This frictional force forces an increase in belt stress. Simultaneously, due to problems such as overloaded cargo transport, speed matching issues between the tensioning motor and the drum motor, icing of the spiral track, or severe oil accumulation on the track, excessive deformation can occur in certain areas of the drum. This can lead to serious mechanical failures such as belt misalignment, belt stacking, belt overturning, and even belt tearing, significantly impacting production efficiency. Secondly, the spiral support used for spiral conveyor belts typically has two or more inner and outer guide rails. Especially for steamed, baked, and frozen fried foods, the inner guide rails accumulate oil and dirt, making cleaning difficult. The contact between the guide rails and the mesh belt generates extremely high frictional forces, increasing operating power and affecting food hygiene and safety. The technical solution adopted to solve this technical problem is: a composite spiral mesh belt conveyor, characterized in that it consists of a self-supporting main drive mechanism, an auxiliary conveying mesh belt mechanism, and an auxiliary return mechanism; the self-supporting main drive mechanism is supported on a support frame by a central shaft of a central drum through a central bearing, and the central shaft connected to the power drives the central drum to rotate. The central drum is cylindrical, and friction strips are assembled on the outermost ring of the central drum. A first guide rail is set at the bottom of the central drum and supported on the support frame. Its spiral diameter is larger than the outermost diameter of the central drum, and it spirally winds around the bottom of the first turn of the forward transmission of the spiral conveyor belt with the pitch of the self-supporting spiral conveyor belt as a reference, which is used to support and guide the self-supporting spiral conveyor belt. A second guide rail is set on the support frame outside the self-supporting spiral conveyor belt, and spirally winds around the outside of the self-supporting spiral conveyor belt with the spiral path of the self-supporting spiral conveyor belt. The inner side of the self-supporting spiral mesh belt is connected to several inner horseshoes through a through shaft. Several support limit seats are continuously or intermittently arranged on the several inner horseshoes. The outer side of the self-supporting spiral mesh belt is connected to the outer horseshoes through a through shaft. The friction strips and the inner side of the self-supporting spiral mesh belt are connected to the outer horseshoes through a through shaft. The auxiliary conveyor belt mechanism is set at the top discharge end of the self-supporting spiral conveyor belt. The auxiliary drive shaft is set on the bearing seats on both sides of the discharge end support frame. The auxiliary drive motor drives the auxiliary drive shaft to rotate. The auxiliary drive shaft is equipped with an outer gear that meshes with the outer horseshoe. The auxiliary drive shaft is also equipped with inner support free rollers to form inner idlers of the self-supporting spiral conveyor belt. The auxiliary return mechanism is fixed to the support frame by a free wheel positioning drum set at the bottom of the central drum and coinciding with its axis. The free wheel positioning drum is embedded in the inner ring of the bottom free wheel for rotation center positioning. Several support rollers are set on the support frame below the bottom free wheel to support the rotation of the bottom free wheel. The free wheel drive mechanism connected to the power is set on the support frame. The rollers on the free wheel drive mechanism are radially equipped with pre-tensioning devices so that the outer ring of the rollers on the free wheel drive mechanism is close to the inner ring of the bottom free wheel. Through friction drive, the bottom free wheel is driven to rotate in the opposite direction to the central drum. The friction drive of the outer ring of the bottom free wheel drives the inner auxiliary self-supporting spiral conveyor belt of the self-supporting spiral conveyor belt to return to the inlet.The bottom free wheel has a C-shaped groove cross-section. The inner and outer diameters of the C-shaped groove on the bottom free wheel's outer ring are equal to the outer diameter of the outermost ring of the central drum. The bottom free wheel rotates in the opposite direction to the central drum, with the central drum as its axis. The central drum is formed by an outer drum plate surrounding it to form a cylinder, and friction strips are assembled onto the outer drum plate to form the outermost ring of the central drum.
[0004] The beneficial effects of this invention compared to the prior art are as follows: Firstly, the self-supporting spiral conveyor belt is axially wound around the outside of the central drum in a self-supporting form. The main spiral drive is achieved through frictional contact between the conveyor belt's inner shaft and the friction strips of the central drum. The self-supporting spiral conveyor belt internally defines the spiral trajectory of the entire spiral drive, preventing localized belt overturning. It eliminates the need for the support rails on the inner side of the traditional drum spiral conveyor belt, reducing frictional resistance between the spiral conveyor belt and the rails. Simultaneously, it eliminates the accumulation of various contaminants on the internal guide rails caused by the conveyed materials. This aims to achieve a spiral conveyor belt drive with minimal frictional driving force, thereby reducing power consumption and component wear, while also solving the problem of food safety and hygiene issues caused by internal support contamination in traditional spiral drums. Secondly, the auxiliary conveyor belt mechanism uses a single outer meshing to drive the outer side of the conveyor belt for tensioning, causing the inner side of the self-supporting spiral conveyor belt to be tensioned against the friction strips on the central drum with a certain tension force, preventing excessive tension from damaging the central drum. Third, the auxiliary return conveyor uses an independent friction drive mechanism to perform return conveying in the opposite direction to the drum, eliminating the force on the drum when the spiral conveyor returns the material. This independent return conveyor mechanism, which does not rely on the central drum, can achieve diversified arrangement of the inlet and outlet ends. Attached Figure Description
[0005] Figure 1 This is an isometric schematic diagram of the present invention; Figure 2 This is a partial isometric schematic diagram of the present invention; Figure 3 This is a schematic diagram of the self-supporting spiral conveyor belt in this invention; Figure 4 This is a schematic diagram of the auxiliary conveyor belt mechanism in this invention; Figure 5 This is an isometric schematic diagram of the auxiliary retraction mechanism in this invention; Figure 6 This is a schematic cross-sectional view of the auxiliary rewind mechanism in this invention; Detailed Implementation
[0006] Example 1: Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A composite spiral conveyor belt device, characterized in that it comprises a self-supporting main drive mechanism, an auxiliary conveyor belt mechanism, and an auxiliary return mechanism; the self-supporting main drive mechanism is supported on a support frame 101 by a central shaft 111 of a central drum 103 via a central bearing 107, and the central shaft 111, connected to the power source, drives the central drum 103 to rotate. The central drum 103 is cylindrical, with friction strips 106 mounted on its outermost ring. A first guide rail 108 is located at the bottom of the central drum 103 and supported on the support frame 101. Its spiral diameter is larger than the outermost diameter of the central drum 103, and it spirally winds around the bottom of the first turn of the spiral conveyor belt 102 with the pitch as the reference, serving as support and guidance. The self-supporting spiral conveyor belt 102 has a second guide rail 112 mounted on the support frame 101 of the outer side 110 of the self-supporting spiral conveyor belt. The guide rail 112 spirally winds around the outer side 110 of the self-supporting spiral conveyor belt 102, supporting the outer side 110. The inner side 109 of the self-supporting spiral mesh belt is connected to several inner horseshoes 114 via a through shaft 115. Several support limiting seats 113 are continuously or intermittently arranged on the inner horseshoes 114. The outer side 110 of the self-supporting spiral mesh belt is connected to outer horseshoes 116 via a through shaft 115. Friction strips 106 contact the through shaft 115 of the inner side 109 of the self-supporting spiral mesh belt for frictional drive. An auxiliary conveyor mesh belt mechanism 104 is located at the top discharge end of the self-supporting spiral conveyor belt 102, and an auxiliary drive shaft... 203 is mounted on the bearing seats 202 on both sides of the discharge end support frame 101. The auxiliary drive motor 201 drives the auxiliary drive shaft 203 to rotate. The auxiliary drive shaft 203 is equipped with an outer gear 204 that meshes with the outer horseshoe 116. The auxiliary drive shaft 203 is also equipped with inner side support free rollers 205 to form a self-supporting spiral mesh belt inner side 109 idler. The auxiliary return mechanism is fixed to the support frame 101 by a free wheel positioning drum 304 located at the bottom of the central drum 103 and coinciding with its axis. The free wheel positioning drum 304 is embedded in the inner ring of the bottom free wheel 301 for rotation center positioning. Several support rollers 303 are set on the support frame 101 below the bottom free wheel 301 to support the bottom free wheel 301. A rotating, power-connected freewheel drive mechanism 302 is mounted on a support frame 101. The rollers on the freewheel drive mechanism 302 are radially pre-tensioned, causing the outer ring of the rollers to adhere tightly to the inner ring of the bottom freewheel 301. Friction drives the bottom freewheel 301 to rotate in the opposite direction to the central drum 103. Friction drives the outer ring of the bottom freewheel 301 to assist the self-supporting spiral conveyor belt 102 in returning to the feed inlet via the inner side 109 of the self-supporting spiral mesh belt. The outer ring of the bottom freewheel 301 has a C-shaped groove cross-section. The inner and outer diameters of the C-shaped groove on the outer ring of the bottom freewheel 301 are equal to the outermost diameter of the central drum 103. The bottom freewheel 301 rotates in the opposite direction to the central drum 103 with the central drum 103 as its axis.The central drum 103 is formed into a cylinder by the outer drum plate 105, and the friction strip 106 is assembled on the outer drum plate 105 to form the outermost ring of the central drum 103.
[0007] The working mechanism of the above-mentioned composite spiral mesh belt conveyor is as follows: When the central shaft 111 connected to the power source rotates, it drives the central drum 103 to rotate. The friction strips 106 on the central drum 103 rotate and drive the through shaft 115 of the inner side 109 of the self-supporting spiral mesh belt through friction, thereby driving the entire self-supporting spiral conveyor belt 102 to convey materials. When the self-supporting spiral conveyor belt 102 near the feed end is conveyed to the lower end of the central drum 103 for friction driving, the self-supporting spiral conveyor belt 102 is supported and guided by the first guide rail 108 to complete the self-supporting spiral conveyor belt. The spiral conveyor belt 102, with a pitch of 102, is spirally wound around the conveyor belt in the first turn of forward transmission. After the first turn of forward transmission is completed, the second, third, and so on, up to the top turn, are supported by the first turn of the self-supporting spiral conveyor belt 102 supporting the second turn, the second turn supporting the third turn, and so on. Throughout the entire transmission process, the next turn supports the previous turn. Simultaneously, during the transmission of the self-supporting spiral conveyor belt 102, the outer side 110 is supported by the second guide rail 112. When… When the self-supporting spiral conveyor belt 102 is driven by friction, to prevent the belt from piling up or the through shaft 115 from not contacting the friction strip 106, an auxiliary conveying belt mechanism 104 is used to tighten the outer side 110 of the self-supporting spiral conveyor belt 102, so that the through shaft 115 on the inner side 109 of the self-supporting spiral belt contacts the friction strip 106 and there is a certain pressure, thereby completing the forward main drive of the self-supporting spiral conveyor belt 102 through friction. When the self-supporting spiral conveyor belt 102 returns to the auxiliary return mechanism The freewheel drive mechanism 302 connected to the power source drives the bottom freewheel 301 to rotate in the opposite direction to the central drum 103 through friction drive. During the entire return process, the support limit seat 113 on the self-supporting spiral conveyor belt 102 is supported by the bottom edge of the C-shaped groove on the outer ring of the bottom freewheel 301. The friction drive of the outer ring of the bottom freewheel 301 supports the inner side 109 of the self-supporting spiral mesh belt, and at the same time, with the support of the bottom edge of the C-shaped groove on the outer ring of the bottom freewheel 301, the self-supporting spiral conveyor belt 102 returns to the feed port to complete the entire composite spiral mesh belt transmission.
Claims
1. A composite spiral mesh belt conveyor, characterized in that: It consists of a self-supporting main drive mechanism, an auxiliary conveyor belt mechanism, and an auxiliary return belt mechanism. The self-supporting main drive mechanism is supported on the support frame (101) by the central shaft (111) of the central drum (103) through the central bearing (107). The central shaft (111) connected to the power drives the central drum (103) to rotate. The central drum (103) is a cylinder. Friction strips (106) are assembled on the outermost ring of the central drum (103). The first guide rail (108) is set at the bottom of the central drum (103) and supported on the support frame (101). Its spiral diameter is larger than the outermost diameter of the central drum (103). Based on the pitch of the self-supporting spiral conveyor belt (102), the spiral is wound around the bottom of the first turn of the spiral conveyor forward drive for support and guidance. A self-supporting spiral conveyor belt (102) is provided, and a second guide rail (112) is set on the support frame (101) on the outer side (110) of the self-supporting spiral conveyor belt. The self-supporting spiral conveyor belt (102) spirally winds around the outer side (110) of the self-supporting spiral conveyor belt (102) to support the outer side (110). The inner side (109) of the self-supporting spiral mesh belt is connected to several inner horseshoes (114) through a through shaft (115). Several support limiting seats (113) are continuously or intermittently arranged on the several inner horseshoes (114). The outer side (110) of the self-supporting spiral mesh belt is connected to the outer horseshoes (116) through a through shaft (115). The friction strip (106) contacts the through shaft (115) on the inner side (109) of the self-supporting spiral mesh belt for friction drive. The auxiliary drive shaft (203) is set on the top discharge end of the self-supporting spiral conveyor belt (102). The auxiliary drive shaft (203) is set on the bearing seats (202) on both sides of the discharge end support frame (101). The auxiliary drive motor (201) drives the auxiliary drive shaft (203) to rotate. The auxiliary drive shaft (203) is equipped with an outer gear (204) that meshes with the outer horseshoe (116). The auxiliary drive shaft (203) is also equipped with a free roller (205) supporting the inner side of the mesh belt to form the inner (109) idler of the self-supporting spiral mesh belt. The auxiliary return mechanism is fixed to the support frame (101) by a free wheel positioning drum (304) set at the bottom of the central drum (103) and whose axis coincides with its axis. The free wheel positioning drum (304) is embedded in the support frame (101). The inner ring of the bottom free wheel (301) is positioned at the rotation center. Several support rollers (303) are set on the support frame (101) below the bottom free wheel (301) to support the rotation of the bottom free wheel (301). The free wheel drive mechanism (302) connected to the power is set on the support frame (101). The rollers on the free wheel drive mechanism (302) are radially equipped with pre-tensioning devices so that the outer ring of the rollers on the free wheel drive mechanism (302) is close to the inner ring of the bottom free wheel (301). Through friction drive, the bottom free wheel (301) and the central drum (103) are rotated in opposite directions. The friction drive of the outer ring of the bottom free wheel (301) assists the self-supporting spiral conveyor belt (102) to return to the feed port through the inner side (109) of the self-supporting spiral mesh belt.
2. The composite spiral mesh belt conveyor according to claim 1, characterized in that... The outer ring of the bottom free wheel (301) has a C-shaped groove cross section.
3. The composite spiral mesh belt conveyor according to claim 2, characterized in that... The inner and outer diameters of the C-shaped groove on the outer ring of the bottom free wheel (301) are equal to the outermost outer diameter of the central drum (103). The bottom free wheel (301) rotates in the opposite direction to the central drum (103) with the central drum (103) as the axis.
4. A composite spiral mesh belt conveyor according to claim 1 or 2, characterized in that... The central drum (103) is surrounded by an outer drum plate (105) to form a cylinder, and friction strips (106) are assembled on the outer drum plate (105) to form the outermost ring of the central drum (103).
5. The composite spiral mesh belt conveyor according to claim 3, characterized in that... The central drum (103) is surrounded by an outer drum plate (105) to form a cylinder, and friction strips (106) are assembled on the outer drum plate (105) to form the outermost ring of the central drum (103).