Three-dimensional sealing structure of belt conveyor

Abstract

This invention discloses a three-dimensional sealing structure for a belt conveyor, comprising an arc-shaped skirt, a guide trough, a belt, and an adjusting and pressing device. The arc-shaped skirt is a naturally formed, non-force-bent arc-shaped plate. A gap is formed between the side plate of the guide trough and the side edge of the belt. The arc-shaped skirt is disposed on the outer surface of the side plate, with its lower edge naturally extending into the gap between the side plate and the belt and contacting the surface of the belt for a movable seal. The upper edge of the arc-shaped skirt abuts against the outer surface of the side plate. The adjusting and pressing device is installed on the side plate and is used to adjust the distance between the middle section of the arc-shaped skirt and the side plate, so that the middle section of the arc-shaped skirt remains in a stored-force state. This invention has advantages such as being pre-designed and formed in the factory, convenient on-site installation, simple adjustment, good sealing control, beneficial sealing compensation, and good wear compensation.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor sealing technology, and in particular to a three-dimensional sealing structure for belt conveyors. Background Technology

[0002] In belt conveyor systems for bulk materials, the feed chute, primarily designed to control dust dispersion, encloses the space above the belt. Since the belt is in motion while the feed chute is stationary, and considering factors such as belt movement fluctuations and inconsistencies in various reference standards, a sufficiently large gap must be maintained between the belt and the feed chute. Furthermore, the shape and dimensions of the gap will change in three-dimensional space due to variations in the belt's movement over different time periods, changes in its position, and changes in the amount and state of the material.

[0003] As a linear, large-scale sealing component, the skirt plate can dynamically, stably, persistently, and effectively eliminate groove gaps throughout the entire length of the feed channel. The sealing requirements of this large-scale sealing component differ from those of other small-scale sealing components in the following ways: due to its large size, it exhibits significant three-dimensional characteristics; due to the need to adapt to belt movement, the seal has dynamic properties; and due to the need to adapt to changes in various factors, it must possess effective multi-compensation and composite compensation capabilities.

[0004] Traditional skirting boards are generally available in two basic types based on their cross-sectional shape: I-type (straight skirting board) and Y-type (straight skirting board with auxiliary sealing strip). However, both I-type and Y-type skirting boards have disadvantages such as inconvenient installation, inconvenient adjustment, poor sealing control, poor sealing compensation, poor wear compensation, and short service life. Summary of the Invention

[0005] The purpose of this invention is to provide a three-dimensional sealing structure for belt conveyors, which solves the problems existing in the prior art and has the advantages of convenient installation, simple adjustment, good sealing control, beneficial sealing compensation, and good wear compensation.

[0006] To achieve the above objectives, the solution of the present invention is:

[0007] A three-dimensional sealing structure for a belt conveyor includes an arc-shaped skirt, a guide trough, a belt, and an adjusting and pressing device. The arc-shaped skirt is a naturally formed, non-force-bent arc-shaped plate. The side plate of the guide trough forms a gap with the side edge of the belt. The arc-shaped skirt is disposed on the outer side of the side plate, with its lower edge naturally extending into the gap between the side plate and the belt and contacting the surface of the belt for a movable seal, and the upper edge of the arc-shaped skirt abuts against the outer side of the side plate. The adjusting and pressing device is installed on the side plate and is used to adjust the distance between the middle section of the arc-shaped skirt and the side plate so that the middle section of the arc-shaped skirt remains in a stored state.

[0008] The curved skirt panel has a built-in or external first water hole along its length, and the first water hole is connected to the outer side of the curved skirt panel.

[0009] Preferably, the first water hole is a built-in water hole, and the diameter or equivalent diameter of the first water hole does not exceed 70% of the thickness of the arc-shaped skirt plate.

[0010] Preferably, the peripheral surface of the first water hole is connected to the outer surface of the arc-shaped skirt panel through a second water hole disposed perpendicular to the arc-shaped skirt panel. Alternatively, the peripheral surface of the first water hole is connected to the outer surface of the arc-shaped skirt panel through an inclined third water hole.

[0011] Alternatively, a water pipe can be installed on the outer side of the curved skirt panel, with the first water hole inside the water pipe and a hole facing the outer side of the curved skirt panel cut out on the surface of the water pipe.

[0012] The adjusting and pressing device is a direct-pressure adjusting and pressing device, a cantilever direct-pressure adjusting and pressing device, a pressure bar cantilever adjusting and pressing device, or a pressure bar simply supported adjusting and pressing device.

[0013] After adopting the above technical solution, the present invention has the following technical effects:

[0014] This invention, due to the three-dimensional structural features of its curved skirt, offers superior performance compared to traditional I-type and Y-type skirts. It boasts excellent spatial adaptability and ease of installation, allowing for direct factory molding according to design and rapid on-site installation with minimal adjustments and high precision. Adjustments to the seal tightness are easily made by adjusting the adjusting clamping device of the curved skirt, providing intuitive and definitive control over contact force adjustment and ensuring a constant seal tightness after adjustment. The curved skirt offers wide-range and multi-dimensional composite compensation, adaptively compensating for sealing in three dimensions. Furthermore, in the initial installation position, the curved skirt's surface contacts the belt in a curved manner, providing potential sealing and compensation. Moreover, the curved skirt has a wide range of applications, exhibiting good adaptability in trough belt conveyors, flat belt conveyors, and guide troughs at various angles, while also offering both manufacturing and overall economic advantages. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a specific embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the first connection method between the first water hole and the outer side of the arc-shaped skirt plate of the present invention;

[0017] Figure 3This is a schematic diagram of a second connection method between the first water hole and the outer side of the arc-shaped skirt plate in this invention;

[0018] Figure 4 This is a schematic diagram of the first embodiment of the adjusting clamping device of the present invention;

[0019] Figure 5 This is a schematic diagram of a second embodiment of the adjusting clamping device of the present invention;

[0020] Figure 6 This is a schematic diagram of a third embodiment of the adjusting clamping device of the present invention;

[0021] Figure 7 This is a schematic diagram of a fourth embodiment of the adjusting clamping device of the present invention;

[0022] Figure 8 This is a schematic diagram of the installation of the arc-shaped skirt panel of the present invention;

[0023] Figure 9 Installation diagram of a traditional straight skirt panel Figure 1 ;

[0024] Figure 10 Installation diagram of a traditional straight skirt panel Figure 2 ;

[0025] Figure 11 This is a schematic diagram illustrating the tension adjustment of the curved skirt panel of the present invention;

[0026] Figure 12 This is a schematic diagram illustrating the composite compensation properties of the arc-shaped skirt panel of the present invention;

[0027] Figure 13 This is a schematic diagram illustrating the potential sealing performance of curved and straight skirt panels.

[0028] Figure 14 This is a schematic diagram showing the installation of the curved skirt between the trough-shaped strip and the right-angle guide trough.

[0029] Figure 15 This is a schematic diagram showing the installation of the curved skirt between the trough-shaped belt and the negative angle guide trough.

[0030] Figure 16 This is a schematic diagram showing the installation of the curved skirt between the flat belt and the right-angle guide chute.

[0031] Figure 17 This is a schematic diagram showing the installation of the curved skirt between the flat belt and the negative angle guide groove.

[0032] Explanation of icon numbers:

[0033] 1----Curved skirt panel; 11---First water hole; 12---Second water hole; 13---Third water hole;

[0034] 2---- Feed chute; 21--- Side plate;

[0035] 3----Belt;

[0036] 4----Adjusting clamping device; 4a---Direct pressure adjusting clamping device; 4b---Cantilever direct pressure adjusting clamping device; 4c---Pressure bar type cantilever adjusting clamping device; 4d---Pressure bar type simply supported adjusting clamping device;

[0037] 5----Straight skirt board. Detailed Implementation

[0038] To further explain the technical solution of the present invention, the present invention will be described in detail below through specific embodiments.

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of protection of the invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of the embodiments of the present invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, or the orientation or positional relationship in which those skilled in the art are usually understood. It is only for the purpose of simplifying the description of the embodiments of the present invention, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present invention.

[0043] Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for mutual communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The following disclosure provides many different embodiments or examples for implementing different structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0047] Furthermore, this invention provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0048] refer to Figures 1 to 7 As shown, the present invention discloses a three-dimensional sealing structure for a belt conveyor, including an arc-shaped skirt 1, a guide trough 2, a belt 3, and an adjusting and pressing device 4;

[0049] The curved skirt panel 1 is a naturally formed, non-stressed curved panel.

[0050] The side plate 21 of the guide trough 2 forms a gap with the side of the belt 3; the arc-shaped skirt 1 is set on the outer side of the side plate 21, and its lower edge naturally extends into the gap between the side plate 21 and the belt 3 and contacts the surface of the belt 3 to provide a movable seal, and the upper edge of the arc-shaped skirt 1 abuts against the outer side of the side plate 21.

[0051] The adjusting clamping device 4 is installed on the side plate 21 and is used to adjust the distance between the middle section of the arc-shaped skirt 1 and the side plate 21 so that the middle section of the arc-shaped skirt 1 remains in a stored state.

[0052] The following illustrates specific embodiments of the present invention.

[0053] The aforementioned curved skirt 1 is provided with an internal or external first water hole 11 along its length direction. The first water hole 11 is connected to the outer surface of the curved skirt 1. The first water hole 11 can be a circular cross-section hole or other cross-sectional shapes. By designing the first water hole 11, water can flow through the length direction of the curved skirt 1 and flow out from the outer surface of the curved skirt 1. Then, under the action of gravity, it flows to the lower edge of the curved skirt 1, that is, to the contact position between the curved skirt 1 and the belt 3. The water can play a role in lubrication and cooling (the friction of the belt will generate heat) at this point. On the other hand, the surface tension of the water can fill the small gap between the curved skirt 1 and the belt 3 after wear, thus helping to achieve a sealing effect.

[0054] Furthermore, the aforementioned first water hole 11 is an internal water hole, meaning that the first water hole 11 is hollowed out and formed inside the arc-shaped skirt plate 1, and the diameter or equivalent diameter of the first water hole 11 does not exceed 70% of the thickness of the arc-shaped skirt plate 1. See also... Figure 2 and Figure 3 There are two ways to connect the built-in first water hole 11 to the outer side of the arc-shaped skirt plate 1: In Figure 2 In the first communication method shown, the peripheral surface of the first water hole 11 is connected to the outer surface of the arc-shaped skirt 1 through a second water hole 12 disposed perpendicular to the arc-shaped skirt 1; Figure 3 In the second connection method shown, the peripheral surface of the first water hole 11 is connected to the outer surface of the arc-shaped skirt 1 through the inclined third water hole 15.

[0055] Alternatively, an external first water hole 11 can be formed by installing a water pipe on the outer side of the curved skirt panel 1, and a hole facing the outer side of the curved skirt panel 1 can be cut out on the surface of the water pipe to allow water to flow out. In comparison, the method of embedding the first water hole 11 inside the curved skirt panel 1 is less expensive and easier to install.

[0056] The aforementioned adjusting and clamping device 4 is a prior art device used for installing straight skirt panels, and can be directly applied to the installation of curved skirt panels 1. See also Figures 4 to 7 Different types of adjusting clamping devices 4 are shown respectively: Figure 4 In this context, the aforementioned adjusting clamping device 4 is a direct-pressure adjusting clamping device 4a; Figure 5 In the above-mentioned adjusting clamping device 4, it is a cantilever direct pressure adjusting clamping device 4b; Figure 6 In the above-mentioned adjusting and pressing device 4, the pressing bar type cantilever adjusting and pressing device 4c is used; Figure 7 In the above-mentioned adjusting and pressing device 4, it is a pressure bar type simply supported adjusting and pressing device 4d.

[0057] The technical effects of this invention are explained as follows:

[0058] (1) Analyzing the structures of the curved skirt 1 and the traditional straight skirt (the main seal of the Y-shaped skirt is the same as that of the straight skirt), it is easy to see that, without considering the thickness of the plates: the curved skirt 1 is a three-dimensional structure, requiring a three-dimensional scale for characterization; the straight skirt is a two-dimensional structure, requiring only a two-dimensional scale for characterization. The superior performance of the curved skirt 1 compared to the straight skirt is due to its three-dimensional structural characteristics.

[0059] (2) Excellent technical performance

[0060] The excellent overall sealing performance of the curved skirt plate 1 is achieved through various specific technical performances, which are reflected in position adaptability and ease of installation, adjustable sealing degree, composite compensation, initial position sealing, lubrication and friction reduction, and micro-liquid sealing.

[0061] 2.1 Spatial adaptability and ease of installation

[0062] The sealing space between the side plate 21 of the feed chute 2 and the surface of the belt 3 is the installation space for the skirt. The plane of the side plate 21 serves as the mounting support and fixing surface for the skirt. The seal between the skirt and the side plate 21 is naturally achieved as the skirt is supported and secured. Therefore, the contact points (lines and surfaces) between the skirt and the surface of the belt 3 are the key areas requiring sealing. Whether the skirt is suited to this spatial position directly affects the installation operation. See also Figure 8 The curved skirt 1 adopts a curved structure, which can naturally adapt to the space between the side plate 21 and the belt 3, and directly insert into the gap between the guide groove 2 and the belt 3, without... Figure 9 and Figure 10The straight skirt plate shown is inserted into the gap between the guide groove 2 and the belt 3, which requires bending of the skirt plate to generate friction force f. The installation is convenient, easy and labor-saving. This installation can ensure positioning and certainty, and lay a good foundation for subsequent adjustment of the sealing degree (tightness). Moreover, according to different working conditions, the arc-shaped skirt plate 1 with the corresponding size requirements can be directly formed in the factory according to the design. Only slight adjustments are needed on site. The curvature of the arc-shaped skirt plate 1 is easier to control. Compared with the traditional skirt plate installation method, it can achieve higher adjustment accuracy without relying on the experience of the operator, and can eliminate the influence of the harsh on-site environment.

[0063] 2.2 Simple and reliable adjustment of sealing tightness

[0064] During the initial installation and use of the skirt panel, the tightness of the seal needs to be adjusted, which means adjusting the contact force between the skirt panel and the belt sealing points (lines and surfaces): if the contact force is too small, the seal is too loose and cannot seal static or dynamic gaps, causing dust to escape (too loose seal, powder leakage); if the contact force is too large, the seal is too tight and puts excessive pressure on the belt surface, causing excessive pressure friction between the skirt panel and the belt surface, which causes the friction pair to heat up and smoke (too tight seal, smoke).

[0065] See Figure 11 The curved skirt 1 can change the radius R of the arc curve by adjusting the clamping force F acting on the outer side of the skirt, and change the contact force F1 at the sealing contact point (line, surface): when the clamping force F of the skirt increases, the radius R of the arc curve increases and the contact force F1 increases; when the clamping force F of the skirt decreases, the radius R of the arc curve decreases and the contact force F1 decreases. The adjustment of the curved skirt 1 can be easily and simply achieved by adjusting the clamping device 4. The magnitude of the contact force F1 is intuitive and definite, and the tightness of the seal is constant after the adjustment.

[0066] 2.3 Large-scale and multi-dimensional composite compensation

[0067] The compensation performance of seals in terms of wear, deformation, vibration, and fluctuation compensation of the sealed object is an important indicator of sealing performance. Rubber seals utilize the elasticity of the material to achieve compensation. In a planar-to-planar supported and fixed structure, a straight skirt cannot directly achieve elasticity; it must be artificially bent during installation. This method of indirectly achieving elasticity in a planar structure requires highly experienced personnel, is often random and rough, and the results are difficult to control, with a small compensation range and large abrupt changes. Two-dimensional compensation is acceptable, but three-dimensional compensation is inadequate. For comparison, see [link to relevant documentation]. Figure 12The curved skirt 1 is located in the curved-plane support and fixed structure, which can directly obtain elasticity, is easy to control, has a large compensation range, and the changes in spatial and mechanical quantities are relatively smooth. In addition, since it is a three-dimensional structure, the curved skirt 1 has contact points (lines, surfaces) a, b, and c with the guide trough 2 and belt 3, which can adaptively compensate in three dimensions.

[0068] 2.4 The initial position has potential sealing properties

[0069] The initial position of the skirt panel refers to its free-installation position before it is fixed in place. Whether the skirt panel has potential sealing performance in this position is one of the technical performance indicators of the skirt panel. The initial positions of the curved skirt panel 1 and the straight skirt panel 5 are as follows: Figure 13 As shown, the dotted line represents the curved skirt 1, which contacts the belt 3 at point d. This is a curved surface contact of the skirt, providing potential sealing and compensation. The solid line represents the straight skirt 5, which contacts the belt 3 at point e. This is an end face contact of the skirt, resulting in poor sealing and no compensation.

[0070] 2.5 Excellent lubrication and friction reduction properties, and enhanced micro-liquid sealing performance.

[0071] See Figure 2 and Figure 3 The curved skirt plate 1 has a first water hole 11 along its length, and a second water hole 12 or a third water hole 13 connected to the first water hole 11. When water supply is available and the skirt plate needs to be in a "wet" state, water can be supplied to the outer surface of the curved skirt plate 1, allowing a small or trace amount of water to flow through the second water hole 12 and distributed to the contact point (line or surface) between the curved skirt plate 1 and the belt 3. The water supply does not need to be large; the empirical standard is that the water marks on the belt 3 dry and disappear within 5 to 10 meters after leaving the feed chute with the belt. Water has both a lubricating and sealing effect on the relative motion sealing surfaces between the plates and strips: the lubricating effect of water greatly reduces the coefficient of friction between the plates and strips, thereby significantly reducing friction, reducing wear on the friction pairs, and increasing the life of the skirt plate; the sealing effect of water is manifested in the flexible filling of possible dynamic micro gaps by a small amount of water, producing a micro-liquid water film, which effectively isolates the inside and outside of the sealing area. The water film also has a capturing effect on fine dust, thus enhancing the sealing performance.

[0072] When water supply is unavailable, or in situations where water is inconvenient to use, or when the bulk material has high moisture content, water may not flow through the first water hole 11, allowing the skirt panel to be in a "dry" state. When the skirt panel is used wet, the tightness of the seal can be adjusted more loosely. When the skirt panel is used dry, the tightness of the seal must be adjusted more strictly.

[0073] 2.6 Applicable scope and manufacturing economy of curved skirt panels

[0074] The curved skirt panel 1 has a wide range of applications. Figure 14 and Figure 15 In the trough belt conveyor shown, and in Figure 16 and Figure 17 This applies equally to all flat belt conveyors shown. For the right-angle guide chute ( Figures 4 to 8 etc.), right-angle guide trough ( Figure 14 and Figure 16 ), negative angle guide groove ( Figure 15 and Figure 17 Not only are they applicable, but they also possess superior technical performance compared to Type I and Type Y skirts under comparable conditions; in the case of flat belt conveyors and negative angle guide chutes, the use of small-scale radius arc skirts can further improve technical performance.

[0075] The manufacturability of the curved skirt board 1 is much better than that of the Y-shaped skirt board, and basically the same as that of the straight skirt board 5. It has the advantages of simple manufacturing process, fewer manufacturing control variables, easy quality control, and high yield. The economy of the curved skirt board 1 is reflected in manufacturing economy and overall economy: the manufacturing economy of the curved skirt board 1 is better than that of the Y-shaped skirt board, and basically the same as that of the straight skirt board 5. However, considering that its various technical performance indicators, including lifespan, are far superior to those of the I-type and Y-type skirt boards, the overall economy of the curved skirt board 1 is much higher than that of the I-type and Y-type skirt boards.

[0076] The above embodiments and figures are not intended to limit the product form and style of the present invention. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of the present invention.

Claims

1. A three-dimensional sealing structure for a belt conveyor, characterized in that: Includes curved skirting board, guide trough, belt and adjusting clamping device; The curved skirt is a naturally formed, non-force-bent curved plate; the curved skirt has a built-in or external first water hole along its length, and the first water hole is connected to the outer side of the curved skirt. The side plate of the guide trough forms a gap with the side edge of the belt; the arc-shaped skirt is disposed on the outer side of the side plate, and its lower edge naturally extends into the gap between the side plate and the belt and contacts the surface of the belt to provide a movable seal, and the upper edge of the arc-shaped skirt abuts against the outer side of the side plate. The adjusting and pressing device is installed on the side plate and is used to adjust the distance between the middle section of the arc-shaped skirt and the side plate so that the middle section of the arc-shaped skirt remains in a stored state; the adjusting and pressing device is a direct pressure adjusting and pressing device, a cantilever direct pressure adjusting and pressing device, a pressure bar cantilever adjusting and pressing device, or a pressure bar simply supported adjusting and pressing device.

2. The three-dimensional sealing structure of the belt conveyor as described in claim 1, characterized in that: The first water hole is a built-in water hole, and the diameter or equivalent diameter of the first water hole does not exceed 70% of the thickness of the arc-shaped skirt plate.

3. The three-dimensional sealing structure of the belt conveyor as described in claim 2, characterized in that: The peripheral surface of the first water hole is connected to the outer side of the arc-shaped skirt through a second water hole located perpendicular to the arc-shaped skirt.

4. The three-dimensional sealing structure of the belt conveyor as described in claim 2, characterized in that: The periphery of the first water hole is connected to the outer side of the arc-shaped skirt through an inclined third water hole.

5. The three-dimensional sealing structure of the belt conveyor as described in claim 1, characterized in that: A water pipe is installed on the outer side of the arc-shaped skirt panel. The water pipe has the first water hole inside and a hole facing the outer side of the arc-shaped skirt panel is hollowed out on the surface of the water pipe.

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