Energy-saving self-closing vacuum adsorption conveying belt

Abstract

The present application relates to the field of conveying belt, in particular to a kind of energy-saving self-closing vacuum adsorption conveying belt, including the conveying belt body with multiple vacuum adsorption holes, a valve flap flap is arranged in each vacuum adsorption hole, one end of valve flap flap is set as the dome portion of circular arc that can pass through vacuum adsorption hole, the other end is set as the base portion of circular ring that can close vacuum adsorption hole, the base portion of each valve flap flap is radially connected at least three elastic strips, the other end of elastic strip is fixed on conveying belt body, and elastic strip has the pre-stress of pulling valve flap flap to close vacuum adsorption hole.The embodiment of the present application closes the air flow channel of vacuum adsorption hole by valve flap flap, and makes valve flap flap be opened by the weight of material, so that conveying belt body only forms air flow channel in the area covered by material, reduces air leakage, provides a more stable, reliable negative pressure environment for the material to be adsorbed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of conveying belt, in particular to an energy-saving self-closing vacuum suction conveying belt. BACKGROUND

[0002] Vacuum suction conveyors are widely used in electronic, packaging, logistics sorting and other automated production lines. Such devices usually adopt a conveying belt with a large number of through suction holes. When the material is placed on the conveying belt and covers the suction holes, the negative pressure in the vacuum chamber generates suction force through the suction holes, firmly fixing the material on the conveying belt and moving with it.

[0003] However, the conventional vacuum suction conveyor has an inherent technical defect: when there is no material on the conveying belt or the material does not completely cover the area below all suction holes (i.e. invalid area), a large number of uncovered suction holes will become a direct communication channel with the outside atmosphere, resulting in continuous and large-scale air leakage, and further causing energy loss, noise and unstable suction force. SUMMARY

[0004] The purpose of the present application is to provide an energy-saving self-closing vacuum suction conveying belt, which aims to solve the technical problems of energy loss, noise and unstable suction force caused by the continuous opening of suction holes in the invalid area of the existing vacuum suction conveyor.

[0005] To solve the above technical problems, the present application specifically provides the following technical solutions:

[0006] An energy-saving self-closing vacuum suction conveying belt, comprising:

[0007] a conveying belt body having a plurality of vacuum suction holes;

[0008] a plurality of valve flaps arranged in each of the vacuum suction holes, one end of the valve flap being arranged as a dome-shaped arch capable of passing through the vacuum suction hole, and the other end being arranged as a circular base capable of closing the vacuum suction hole to restrict airflow;

[0009]

[0009] an elastic strip, the base of each valve flap being connected to at least three elastic strips in a radial manner, the other end of the elastic strip being fixed to the conveying belt body, and the elastic strip having a pre-stress to pull the valve flap to close the vacuum suction hole.

[0010] Further, the vacuum suction holes are evenly distributed and arranged, and adjacent vacuum suction holes are arranged at each corner of a planar regular polygon, and the end of the elastic strip inside the same planar regular polygon points to the center of the planar regular polygon and is fixed to the conveying belt body by the same adhesive, so that the elastic strip forms a pre-tensioned mesh belt with the adhesive and the vacuum suction holes as nodes.

[0011] Further, the conveying belt body is installed on a power device of a belt conveyor with a vacuum box, when the conveying belt body is tensioned by the power device, the elastic strip is stretched by the tensioning force, the resultant force of the pre-tension of all the elastic strips connected to each valve flap and the tensioning force is parallel to the axis of the vacuum suction hole and points to the center of the vacuum suction hole.

[0012] Further, the outer edge of one side of the base part towards the conveying belt body is provided with an annular sealing lip, the hardness of the annular sealing lip is less than the hardness of the base part, and when the base part seals the vacuum suction hole, the annular sealing lip elastically deforms to seal the gap between the base part and the conveying belt body.

[0013] Further, the vacuum suction holes are evenly distributed and arranged, and adjacent vacuum suction holes are arranged at each corner of a planar regular polygon, and the end of the elastic strip inside the same planar regular polygon points to the center of the planar regular polygon and is fixed to the conveying belt body by the same adhesive, so that the elastic strip forms a pre-tensioned mesh belt with the adhesive and the vacuum suction holes as nodes;

[0014] Wherein, the pull ring is made of shape memory alloy, and the pull ring generates radial deformation when heated to tension or relax the elastic strip to change the required force to open the valve flap.

[0015] Further, each of the pull rings is sleeved on an adhesive, the adhesive is fixed to the conveying belt body by hot pressing vulcanization, and an outer ring of the adhesive is provided with an annular groove for embedding the pull ring.

[0016] Further, a heating element is installed inside each of the adhesives, and the heating element is used to heat the pull ring to make it radially deform.

[0017] Further, the heating element is a circular ring shape, and the heating element is arranged inside the annular groove, the pull ring is sleeved on the outside of the heating element, and an annular gap is arranged between the pull ring and the heating element for radial deformation of the pull ring.

[0018] Further, the conveying belt body is connected with a cover layer, the elastic strips and the valve flap are arranged between the conveying belt body and the cover layer, the adhesive member is fixed with the conveying belt body and the cover layer by means of hot-pressing vulcanization, and a plurality of air-permeable holes are arranged on the cover layer.

[0019] The heating element comprises two electrodes, and two conductive tracks arranged in parallel along the length direction of the cover layer are arranged on the cover layer, a positive electrode of the two electrodes is connected with one of the conductive tracks, and a negative electrode is connected with the other conductive track.

[0020] Further, the conveying belt body is installed on a power device of a belt conveyor provided with a vacuum box and an electric brush, the electric brush is fixed in the vacuum box, and the electric brush is in sliding friction connection with the conductive tracks to supply power to the conductive tracks.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The embodiment of the application seals the vacuum suction holes of the conveying belt body by means of the valve flap, and enables the valve flap to be opened by the weight of the material, so that the conveying belt body only forms a vacuum suction force in the area covered by the material, thereby reducing air leakage and providing a more stable and reliable negative pressure environment for the suctioned material. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only exemplary, and for those skilled in the art, other drawings can also be obtained from the provided drawings without creative labor.

[0024] Figure 1 is a perspective view of the first embodiment of the application;

[0025] Figure 2 is a top view of the self-sealing belt of the first embodiment of the application;

[0026] Figure 3 is a sectional view of the A-A direction of Figure 2 ;

[0027] Figure 4 is a perspective view of the valve layer of the first embodiment of the application;

[0028] Figure 5 is a perspective view of the valve unit of the first embodiment of the application;

[0029] Figure 6Fig. 2 is a top view of the second embodiment of the present application, wherein the self-closing belt is in a transparent state;

[0030] Figure 7 Fig. 3 is a sectional view along the direction of B-B of Fig. 2; Figure 6

[0031] Figure 8 Fig. 4 is a bottom view of the valve unit of the second embodiment of the present application;

[0032] Figure 9 Fig. 5 is a sectional view along the direction of C-C of Fig. 4; Figure 8

[0033] The reference numerals in the figures represent the following respectively:

[0034] 1 - belt body; 11 - vacuum suction hole; 2 - pre-tensioned mesh belt; 21 - mesh; 22 - elastic strip; 23 - adhesive; 231 - annular groove; 24 - heating element; 241 - electrode; 25 - pull ring; 3 - valve flap; 31 - base; 32 - dome; 33 - annular sealing lip; 4 - cover layer; 41 - air hole; 42 - conductive track; 5 - power device; 6 - vacuum box; 7 - brush. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0036] (First embodiment, refer to Figures 1 to 5 )

[0037] The present embodiment provides an energy-saving self-closing vacuum suction conveying belt, which comprises a belt body 1, a valve flap 3 and an elastic strip 22.

[0038] The belt body 1 has a plurality of vacuum suction holes 11, and each vacuum suction hole 11 is provided with a valve flap 3. One end of the valve flap 3 is provided as a dome-shaped top 32 capable of passing through the vacuum suction hole 11, and the other end is provided as a circular base 31 capable of closing the vacuum suction hole 11 to limit the airflow. The base 31 of each valve flap 3 is connected to at least three elastic strips 22 in a radial manner, and the other end of the elastic strip 22 is fixed to the belt body 1. The elastic strip 22 has a pre-stress to pull the valve flap 3 to close the vacuum suction hole 11.

[0039] The working principle of the present embodiment is as follows:

[0040] ​​When there is no material, the prestress of the elastic strip 22 always pulls the base 31 of the valve flap 3 tightly, so as to tightly close the vacuum suction hole 11 and prevent air leakage, thereby saving energy and reducing noise.

[0041] When the material is placed on the conveying belt, the weight of the material presses on the dome 32 passing through the vacuum suction hole 11. When the combined force of the mechanical pressure and the negative pressure suction force is greater than the prestress of the elastic strip 22, the valve flap 3 is pushed open, the vacuum suction hole 11 is opened, and the material is adsorbed.

[0042] After the material is taken away, the valve flap 3 immediately rebounds and resets under the action of the prestress, resealing the hole.

[0043] Further, in order to efficiently and stably fix a large number of elastic strips 22 on the conveying belt body 1 and ensure uniform prestress, the vacuum suction holes 11 of the embodiment are uniformly distributed, and adjacent vacuum suction holes 11 are distributed on each corner of a planar regular polygon. The end of the elastic strip 22 inside the same planar regular polygon points to the center of the planar regular polygon and is fixed to the conveying belt body 1 through the same adhesive 23, so that the elastic strip 22 forms a pre-tensioned mesh belt 2 with the adhesive 23 and the vacuum suction hole 11 as nodes.

[0044] This technical means integrates the scattered elastic strips 22 into a whole pre-tensioned mesh belt 2. The mesh 21 of the pre-tensioned mesh belt 2 is used for ventilation, and the pre-tensioned mesh belt 2 is connected to the conveying belt body 1 through the adhesive 23. When the adhesive 23 is fixed by hot pressing and vulcanization, the prestress can be applied to the whole pre-tensioned mesh belt 2, thereby simplifying the manufacturing process.

[0045] Further, since the conveying belt body 1 is installed on the power device 5 of the belt conveyor with a vacuum box 6, the conveying belt will bear a large tension force when it runs on the power device 5, which will stretch the pre-tensioned mesh belt 2, thereby interfering with the original prestress and causing the valve flap 3 to deviate or not seal tightly during dynamic operation.

[0046] In order to solve this problem, the prestress of each elastic strip 22 in the transverse direction is greater than that in the longitudinal direction before being tensioned, and the combined force of the prestress and the tension of all the elastic strips 22 connected to each valve flap 3 is parallel to the axis of the vacuum suction hole 11 and points to the center of the vacuum suction hole 11 after being tensioned.

[0047] This design ensures that the tension force of the conveying belt body 1 during operation cooperates with the original prestress of the elastic strip 22, enhances the tendency of the valve flap 3 to close in the center, and ensures the sealing stability and reliability of the valve flap 3 under dynamic operating conditions.

[0048] Furthermore, both the base 31 of the valve valve 3 and the conveyor belt 1 are relatively hard surfaces. When the two are attached, minor surface unevenness or impurities may cause poor sealing and slight air leakage.

[0049] To improve the airtightness of the seal, an annular sealing lip 33 is provided on the outer edge of the side of the base 31 facing the conveyor belt 1 in this embodiment. The hardness of the annular sealing lip 33 is less than that of the base 31. When the base 31 closes the vacuum adsorption hole 11, the annular sealing lip 33 elastically deforms to seal the gap between the base 31 and the conveyor belt 1.

[0050] This design achieves a higher level of airtightness and further enhances energy efficiency by adding a soft annular sealing lip 33 that elastically deforms when the valve is closed, filling any tiny gaps that may exist between the two hard surfaces.

[0051] (Second embodiment, see reference) Figures 6 to 9 )

[0052] Furthermore, the prestress in the first embodiment is fixed during manufacturing, which limits its applicability: if the prestress is set too high (for heavy objects), the weight of light objects (such as cardboard boxes) is insufficient to push open the valve; if the prestress is set too low (for light objects), the vacuum adsorption force provided by the corresponding negative pressure source must also be designed to be small enough, otherwise the valve flap 3 will always be open, making it difficult to adsorb heavy objects.

[0053] To resolve this technical contradiction and enable the conveyor belt to adapt to materials of different weights, in this embodiment, the vacuum adsorption holes 11 are evenly distributed, and adjacent vacuum adsorption holes 11 are distributed at each corner of a planar regular polygon. The ends of the elastic strips 22 located inside the same planar regular polygon point to the center of the planar regular polygon and are fixed to the conveyor belt body 1 by the same tension ring 25. Thus, the elastic strips 22 form a pre-tensioned mesh belt 2 with the tension ring 25 and the vacuum adsorption holes 11 as nodes.

[0054] The tension ring 25 is made of shape memory alloy. When heated, the tension ring 25 undergoes radial deformation to tension or relax the elastic strip 22, thereby changing the force required to open the valve flap 3.

[0055] The effect of this design is that the diameter of the tension ring 25 can be actively changed by controlling the temperature of the tension ring 25.

[0056] At low temperatures, the pull ring 25 has a large diameter, and the elastic strip 22 exerts a smaller force on the valve disc valve 3. The valve disc valve 3 has high opening sensitivity and is suitable for lightweight materials.

[0057] At high temperatures, the diameter of the pull ring 25 is small after it contracts, which increases the force exerted on the valve valve 3 by tightening the elastic strip 22. This reduces the opening sensitivity of the valve valve 3, making it suitable for bearing heavy objects.

[0058] Furthermore, in order to reliably install the aforementioned tension ring 25 on the conveyor belt body 1, it is necessary to ensure that it is firmly fixed while also providing space for its radial deformation.

[0059] In this embodiment, each tension ring 25 is fitted onto an adhesive component 23, which is fixed to the conveyor belt body 1 by hot-press vulcanization. The outer ring of the adhesive component 23 is provided with an annular groove 231 for the tension ring 25 to be embedded therein.

[0060] This design utilizes the adhesive 23 as a mounting base and provides precise positioning for the pull ring 25 through the annular groove 231, ensuring that it can still be firmly fixed on the preset node of the conveyor belt 1 when it is deformed by heat, thus ensuring the stability of the adjustment function.

[0061] Furthermore, in order to heat the pull ring 25 efficiently, in this embodiment, a heating element 24 is installed inside each adhesive piece 23. The heating element 24 is used to heat the pull ring 25 to cause it to deform radially.

[0062] This design integrates the heating element 24 directly into the adhesive part 23, achieving on-site heating. Its advantages include high heat transfer efficiency and fast response speed, which can quickly heat the pull ring 25, thereby achieving rapid adjustment of the opening sensitivity of the valve valve 3.

[0063] Furthermore, the assembly relationship between the heating element 24 and the pull ring 25 must be precisely designed. If the two are too tightly fitted, the pull ring 25 will not have room to contract when heated, resulting in the failure of the adjustment function.

[0064] To solve this assembly problem, in this embodiment, the heating element 24 is annular in shape, and both the heating element 24 and the pull ring 25 are disposed inside the annular groove 231. The pull ring 25 is fitted on the outside of the heating element 24, and an annular gap is provided between the pull ring 25 and the heating element 24 to allow the pull ring 25 to deform radially.

[0065] The advantages of this design are: the heating element 24 is located on the inner side, which can uniformly heat the outer pull ring 25, while the annular gap ensures that the pull ring 25 has enough physical space to contract radially inward when it is activated by heat, thereby smoothly stretching the elastic strip 22 and enabling the function of adaptively adjusting the opening sensitivity of the valve flap 3 to be realized.

[0066] Furthermore, since the pre-tensioned mesh belt 2, valve valve 3, adhesive component 23, heating element 24 and tension ring 25 are all located on the bottom surface of the conveyor belt body 1, two serious engineering problems arise: First, these precision components are prone to wear due to friction with the rollers of the power unit 5 during operation; second, how to obtain power for the large number of heating elements 24 distributed throughout the moving conveyor belt.

[0067] To address the wear issue, in this embodiment, a cover layer 4 is connected to the conveyor belt body 1. A pre-tensioned mesh belt 2 and a valve flap 3 are disposed between the conveyor belt body 1 and the cover layer 4. An adhesive 23 is fixed to the conveyor belt body 1 and the cover layer 4 by hot-press vulcanization. Several ventilation holes 41 are provided on the cover layer 4.

[0068] To solve the power supply problem, in this embodiment, the heating element 24 includes two electrodes 241, and the cover layer 4 is provided with two conductive rails 42 arranged parallel to each other along its own length direction. The positive electrode of the two electrodes 241 is connected to one conductive rail 42, and the negative electrode is connected to the other conductive rail 42.

[0069] This design utilizes a wear-resistant cover layer 4 as a new bottom surface to withstand friction and protect precision components. At the same time, it connects all electrodes 241 through two conductive rails 42 that run the entire length of the conveyor belt, establishing a unified positive and negative power supply bus on the moving conveyor belt body 1.

[0070] Furthermore, in this embodiment, the conveyor belt 1 is mounted on the power unit 5 of the belt conveyor equipped with a vacuum box 6 and brushes 7. The brushes 7 are fixed inside the vacuum box 6, and the positive and negative poles of the brushes 7 are respectively slidably and friably connected to two conductive rails 42.

[0071] This design maintains a continuous sliding friction connection between the fixed brush 7 and the moving conductive rail 42, allowing current to be stably transmitted to the moving conveyor belt 1, ultimately powering all the heating elements 24.

[0072] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered as falling within the scope of protection of the embodiments of the present invention.

Claims

1. An energy-saving self-sealing vacuum adsorption conveyor belt, characterized in that, include: The conveyor belt (1) has multiple vacuum adsorption holes (11); Several valve valves (3) are disposed in each of the vacuum adsorption holes (11). One end of the valve valve (3) is configured as an arc-shaped dome (32) that can pass through the vacuum adsorption hole (11), and the other end is configured as an annular base (31) that can close the vacuum adsorption hole (11) to restrict airflow. The dome (32) is higher than the upper surface of the conveyor belt (1). Elastic strips (22), at least three elastic strips (22) are radially connected to the base (31) of each valve valve (3), the other end of the elastic strips (22) is fixed to the conveyor belt (1), and the elastic strips (22) have prestress to pull the valve valve (3) to close the vacuum adsorption hole (11); The vacuum adsorption holes (11) are evenly distributed, and adjacent vacuum adsorption holes (11) are distributed at each corner of a planar regular polygon. The ends of the elastic strips (22) located inside the same planar regular polygon point to the center of the planar regular polygon and are fixed to the conveyor belt body (1) by the same tension ring (25). Thus, the elastic strips (22) form a pre-tensioned mesh belt (2) with the tension ring (25) and the vacuum adsorption holes (11) as nodes. The tension ring (25) is made of shape memory alloy. When heated, the tension ring (25) undergoes radial deformation to tension or relax the elastic strip (22) to change the force required to open the valve valve (3).

2. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 1, characterized in that, The conveyor belt (1) is mounted on the power unit (5) of the belt conveyor equipped with a vacuum box (6). When the conveyor belt (1) is tensioned by the power unit (5), the elastic strip (22) is stretched by the tension force. The resultant force of the prestress of all the elastic strips (22) connecting each valve valve (3) and the tension force is parallel to the axis of the vacuum adsorption hole (11) and points to the center of the vacuum adsorption hole (11).

3. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 1, characterized in that, An annular sealing lip (33) is provided on the outer edge of the side of the base (31) facing the conveyor belt (1). The hardness of the annular sealing lip (33) is less than that of the base (31). When the base (31) closes the vacuum adsorption hole (11), the annular sealing lip (33) elastically deforms to seal the gap between the base (31) and the conveyor belt (1).

4. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 1, characterized in that, Each of the pull rings (25) is fitted onto an adhesive piece (23), which is fixed to the conveyor belt body (1) by hot-press vulcanization. The outer ring of the adhesive piece (23) is provided with an annular groove (231) for the pull ring (25) to be embedded therein.

5. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 4, characterized in that, Each of the adhesive elements (23) has a heating element (24) installed inside, which is used to heat the pull ring (25) to cause it to deform radially.

6. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 5, characterized in that, The heating element (24) is in the shape of a ring and is disposed inside the annular groove (231). The pull ring (25) is fitted on the outside of the heating element (24) and an annular gap is provided between the pull ring (25) and the heating element (24) to allow the pull ring (25) to deform radially.

7. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 6, characterized in that, The conveyor belt (1) is connected to a cover layer (4), the elastic strip (22) and the valve valve (3) are disposed between the conveyor belt (1) and the cover layer (4), the adhesive (23) is fixed to the conveyor belt (1) and the cover layer (4) by hot pressing vulcanization, and the cover layer (4) is provided with a plurality of vent holes (41). The heating element (24) includes two electrodes (241), and the cover layer (4) is provided with two conductive rails (42) arranged parallel to each other along its own length direction. The positive electrode of the two electrodes (241) is connected to one of the conductive rails (42), and the negative electrode is connected to the other conductive rail (42).

8. The energy-saving self-sealing vacuum adsorption conveyor belt according to claim 7, characterized in that, The conveyor belt (1) is mounted on the power unit (5) of the belt conveyor equipped with a vacuum box (6) and a brush (7). The brush (7) is fixed inside the vacuum box (6) and is slidably frictionally connected to the conductive rail (42) to supply power to the conductive rail (42).

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