Circulating type material crushing equipment

Abstract

The utility model relates to the field of material crushing equipment, in particular to circulating type material crushing equipment, which comprises a feeding device, a crushing device and a screening device which are sequentially communicated according to a material conveying direction, the feeding device is used for quantitatively conveying materials to be crushed to the crushing device, and the screening device is used for screening the materials to be crushed. The crushing device is used for crushing the materials to be crushed, the screening device is used for screening powder capable of being screened and unscreened materials and conveying the unscreened materials to the feeding device again, and the feeding device, the crushing device and the screening device are sequentially arranged from top to bottom. The circulating type material crushing equipment can solve the problems that a crushing device in the prior art is not uniform in feeding, not thorough in material screening and low in crushing efficiency.

Description

Technical Field

[0001] The utility model relates to the field of material crushing equipment, in particular to a circulating material crushing equipment. Background Art

[0002] In the process of producing ceramic dielectric materials, some specific powders need to be refined, and then various powders are mixed in proportion according to the formula for further use. At present, micronized powder processing technology is widely used in many industrial fields.

[0003] For example, the Chinese utility model patent with application number 201620121402.1 discloses an improved recyclable particle crushing equipment, in which the material enters the crushing chamber through the feed buffer belt, and then the crushed particles that meet the mesh requirements and the incompletely crushed large particles are separated by the filter device, and the large particles are recycled to the crushing chamber by the vacuum feeder. However, it can be seen from the drawings of the above patent that the feed buffer belt of the patent is a funnel-shaped structure that is wide at the top and narrow at the bottom. The material will fall directly from the feed buffer belt into the crushing chamber, which will cause the material to accumulate in the crushing chamber and affect the crushing efficiency of the crushing equipment; at the same time, its filter device separates the sieveable powder from the large particles that cannot be sieved through a screen inclined at a certain angle, and a large opening is left between the screen and the collection chamber, resulting in incomplete separation of the sieveable particles from the large particles that cannot be sieved, and the powder may also fall into the large particle collector below, which has the risk of mixing, and then the vacuum feeder will transport the completely crushed powder to the crushing chamber again, further affecting the crushing efficiency of the crushing equipment.

[0004] In the process of micro powder processing, accurate and stable feeding of materials and screening of powders are crucial to ensure product quality and production efficiency. Existing circulating crushing equipment has problems such as uneven feeding, incomplete screening and the risk of mixing, which leads to low production efficiency. Therefore, a novel micro powder processing equipment is needed to solve the problems existing in the existing technology.

[0005] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Utility Model Content

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a circulating material crushing equipment, so as to solve the problems of uneven feeding and incomplete material screening of the crushing device in the prior art.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A circulating material crushing equipment comprises: a feeding device, a crushing device and a screening device which are sequentially connected in the material conveying direction, wherein the feeding device is used to quantitatively convey the material to be crushed to the crushing device, the crushing device is used to crush the material to be crushed, and the screening device is used to sieve the siftable powder and the unsifted material and convey the unsifted material to the feeding device again, wherein

[0009] The feeding device comprises a storage bin and a conveying mechanism arranged in sequence along the material conveying direction, the discharge port of the storage bin is connected to the feed port of the conveying mechanism, the storage bin is used to collect the material to be crushed and quantitatively transfer the material to be crushed to the conveying mechanism; the discharge port of the conveying mechanism is connected to the crushing device, and is used to transport the material to be crushed from the storage bin to the crushing device.

[0010] The screening device comprises a screen mechanism for separating the screening device into an upper screen layer and a lower screen layer, the discharge port of the crushing device is connected with a feed port of the screening device located above the upper screen layer, the screen mechanism is used to filter the sieveable powder to the lower screen layer, the upper screen layer is also provided with an upper screen material discharge port, the upper screen material discharge port is connected with a feed port of the storage bin, and is used to transport the unscreened material to the storage bin again,

[0011] The storage bin, the conveying mechanism, the crushing device and the screening device are arranged in sequence from top to bottom.

[0012] Furthermore, the screen mechanism includes: a screen, and a ball-supporting plate arranged at intervals below the screen, the screen and the ball-supporting plate divide the interior of the screening device into an upper screen layer located above the screen, an intermediate layer located between the screen and the ball-supporting plate, and a lower screen layer located below the ball-supporting plate; the intermediate layer is provided with a plurality of annular movable retaining rings and a rollable supporting ball arranged in the retaining ring, and the retaining ring is used to limit the range of movement of the supporting ball to prevent the supporting ball from rolling to the edge of the intermediate layer.

[0013] Furthermore, the under-sieve layer of the screening device is provided with an under-sieve material discharge port, and the under-sieve material discharge port is used to transport the powder material of the under-sieve layer to an external material containing device.

[0014] Furthermore, the screening device also includes a vibration motor arranged at the bottom of the under-screen layer.

[0015] Furthermore, the vibration motor is provided with a vibration-damping spring for buffering vibration, and the vibration-damping spring is connected to the bottom of the lower layer of the screen.

[0016] Furthermore, the circulating material pulverizing equipment further comprises a vacuum feeding device for conveying the material to be pulverized to the feeding device and conveying the unscreened material to the feeding device again.

[0017] A feeding transfer bin is provided between the screen-surface material discharge port and the feed port of the vacuum feeding device. The feeding transfer bin has a transfer bin feeding port, a transfer bin feeding port and a transfer bin discharge port which are interconnected. The transfer bin feeding port is connected to the screen-surface material discharge port, and the transfer bin discharge port is connected to the feed port of the vacuum feeding device. The transfer bin feeding port is used for manually feeding the material to be crushed.

[0018] The discharge port of the vacuum feeding device is communicated with the feed port of the storage bin.

[0019] Furthermore, the vacuum feeding device includes: a vacuum device main unit and a feed tank, the vacuum device main unit is connected to the feed tank through an air pipe, the feed port of the feed tank is connected to the discharge port of the transfer bin through a conveying pipe, the discharge port of the feed tank is connected to the feed port of the storage bin, and a first opening and closing valve is provided at the discharge port of the feed tank, and the first opening and closing valve is used to control the loading and unloading of the feed tank together with the vacuum device main unit.

[0020] Furthermore, a weighing sensor is provided at the bottom of the storage bin, and the weighing sensor is used to monitor the weight of the material to be crushed in the storage bin;

[0021] A second opening and closing valve electrically connected to the weighing sensor is also provided at the discharge port of the storage bin, and the weighing sensor is used to adjust the opening and closing degree of the second opening and closing valve according to the weight of the storage bin.

[0022] Furthermore, the conveying mechanism includes a vibrator and a vibrating guide rail connected above the vibrator, the feed port of the vibrating guide rail is connected to the discharge port of the storage bin, the discharge port of the vibrating guide rail is connected to the crushing device, and the vibrator is used to control the vibration of the vibrating guide rail so that the material to be crushed on the vibrating guide rail is evenly conveyed to the crushing device.

[0023] Furthermore, a dust cover is provided above the vibration guide rail.

[0024] Furthermore, the crushing device is any one of a jaw crusher, a hammer crusher, an impact crusher, a cone crusher and a roller crusher.

[0025] Furthermore, depending on the material, the screening device may be any one of a fixed screen, a cylindrical screen and a vibrating screen.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. The material to be crushed can be evenly and slowly transported to the crushing device through the conveying mechanism between the storage bin and the crushing device, which can prevent the material from directly entering the crushing device from the storage bin, resulting in material accumulation in the crushing device;

[0028] 2. The screening device is divided into an upper screen layer and a lower screen layer through a screen mechanism, which can completely separate siftable powder and unsifted materials, avoiding the risk of mixing materials and improving the crushing efficiency of the circulating material crushing equipment;

[0029] 3. The storage bin, conveying mechanism, crushing device and screening device are arranged in sequence from top to bottom, so that the material can fall gradually from top to bottom along the storage bin, conveying mechanism, crushing device and screening device by its own gravity, thereby eliminating the need to set up independent transport devices (such as conveyor belts) between the devices as in the case of parallel arrangement of the devices, and also reducing the manufacturing cost of the circulating material crushing equipment.

[0030] 4. Through the coordination of vacuum feeding device, feeding device, crushing device and screening device, the dust-free and automated circulating material crushing equipment can be realized. On the one hand, after the material is crushed, the unscreened material is automatically transported back to the crushing device through the vacuum feeding device and the feeding device for cyclic crushing, until the crushed material can pass through the screening mechanism to enter the next process. The whole process does not require manual screening and manual handling, which effectively improves production efficiency. On the other hand, the use of vacuum feeders greatly reduces the dust raised by materials during transportation, and also reduces the volatilization and waste of micro powders, which reduces production costs while realizing dust-free material transportation.

[0031] Furthermore, according to the implementation method of the utility model, the feeding device can be flexibly adjusted and controlled according to different powder materials and process requirements. Therefore, it can be applied to micro powder feeding processing in various industrial production processes and has a wide range of application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 It is an overall schematic diagram of the micro powder feeding system processing device in the embodiment of the utility model.

[0034] Figure 2 It is a schematic diagram of a vacuum feeding device in an embodiment of the utility model.

[0035] Figure 3 for Figure 2 A local enlarged schematic diagram of point P in the middle.

[0036] Figure 4 It is a schematic diagram of the delivery device in the embodiment of the utility model.

[0037] Figure 5 It is a schematic diagram of a crushing device in an embodiment of the utility model.

[0038] Figure 6 It is a schematic diagram of a screening device in an embodiment of the present utility model.

[0039] Figure 7 for Figure 6 Schematic diagram of the internal structure section of the screening device.

[0040] Description of reference numerals:

[0041] 1-working platform, 101-first column;

[0042] 2- vacuum feeding device, 21- discharge port of vacuum feeding device, 22- feed port of vacuum feeding device, 201- vacuum device main unit, 202- feeding transfer bin, 2021- feeding port of transfer bin, 2022- feeding port of transfer bin, 2023- discharge port of transfer bin, 203- air pipe, 204- feeding pipe, 205- feeding tank, 206- discharge port of feeding tank, 207- feeding port of feeding tank;

[0043] 3-feeding device, 31-feeding port of feeding device, 32-discharging port of feeding device, 33-conveying mechanism, 301-feeding port of storage bin, 302-storage bin, 307-discharging port of storage bin, 308-feeding port of vibration guide rail, 303-vibration guide rail, 304-vibrator, 305-discharging port of vibration guide rail;

[0044] 4-crushing device, 401-feeding port of the crushing device, 402-crusher, 403-discharging port of the crushing device, 404-second column;

[0045] 5-screening device, 501-feeding port of the screening device, 502-discharging port for upper screen material, 503-discharging port for lower screen material, 504-upper screen layer, 505-middle layer, 506-lower screen layer, 507-chassis, 508-vibration motor, 509-damping spring;

[0046] 6-screen mechanism, 601-screen, 602-ball supporting, 603-retaining ring, 604-ball supporting plate. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0048] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, connection can be used for both fixing and circuit connection.

[0049] In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention.

[0050] It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments of the present utility model. In addition, in the following embodiments, the description of each embodiment has its own emphasis. For parts not described in detail in one embodiment, please refer to the relevant description of other embodiments.

[0051] See also Figures 1 to 7, a specific embodiment of the utility model provides a circulating material crushing equipment, including: a working platform 1, a vacuum feeding device 2, a feeding device 3, a crushing device 4 and a screening device 5. Among them, the vacuum feeding device 2, the feeding device 3, the crushing device 4 and the screening device 5 are connected in sequence according to the material conveying direction. Specifically, the discharge port 21 of the vacuum feeding device (that is, the discharge port 206 of the feeding tank described later) is connected to the feed port 31 of the feeding device (that is, the feed port 301 of the storage bin described later); the discharge port 32 of the feeding device (that is, the discharge port 305 of the vibration guide rail described later) is connected to the feed port 401 of the crushing device; the discharge port 403 of the crushing device is connected to the feed port 501 of the screening device; the discharge port 502 of the screened material of the screening device 5 is connected to the feed port 22 of the vacuum feeding device; the discharge port 503 of the screened material of the screening device 5 is connected to the external material holding device (not shown). The vacuum feeding device 2 is used to convey the material to be crushed to the feeding device 3, the feeding device 3 is used to quantitatively convey the material to be crushed to the crushing device 4, the crushing device 4 is used to crush the material to be crushed, the screening device 5 is used to screen the siftable powder and the unscreened material and convey the unscreened material to the vacuum feeding device 2 again through the screen material discharge port 502 for re-crushing, and convey the siftable powder to the external material holding device. The utility model conveys the unscreened material back to the crushing device for cyclic crushing through the screening device 5 and the vacuum feeding device 2, which can effectively improve the production efficiency.

[0052] In addition, the working platform 1 is a steel structure platform for carrying the feeding device 3. Four first steel columns 101 of the same size are provided at the four corners of the bottom to support the working platform 1 to ensure the stability of the platform. The working platform 1 needs to be kept horizontal and slightly higher than the feed port 401 of the crushing device, so that the materials to be crushed from the feeding device 3 can fall freely to the crushing device 4. In addition, the crushing device 4 is supported by four second steel columns 404 below the feeding device 3, and the screening device 5 is provided below the crushing device 4. Therefore, there is no need to set up a separate transmission mechanism, and the materials can fall freely to each working area by gravity, so that the automatic transmission of materials can be realized.

[0053] Reference Figures 1 to 3 and Figure 6 to Figure 7In a specific embodiment, a feeding transfer bin 202 is provided between the screen-surface material discharge port 502 and the feed port 22 of the vacuum feeding device. The feeding transfer bin 202 is used to store the materials to be crushed that are first added to the circulating material crushing equipment and the unscreened materials after crushing. The feeding transfer bin 202 has a transfer bin feeding port 2021, a transfer bin feeding port 2022 and a transfer bin discharge port 2023 that are interconnected. The transfer bin feeding port 2021 is connected to the screen-surface material discharge port 502, and the transfer bin discharge port 2023 is connected to the feed port 22 of the vacuum feeding device. The transfer bin feeding port 2021 is used for the operator to manually feed the materials to be crushed. Therefore, the feeding transfer bin 202 can realize the re-transportation of unscreened materials and the addition of new materials to be crushed. Preferably, the transfer bin feeding port 2021 is a hinged opening, which is opened when feeding and closed when loading, to prevent dust from leaking out of the transfer bin feeding port 2021 when the equipment is started.

[0054] Reference Figures 1 to 4 In a specific embodiment, the vacuum feeding device 2 includes: a vacuum device main unit 201 and a feed tank 205, the vacuum device main unit 201 is connected to the feed tank 205 through an air pipe 203, the feed port 207 of the feed tank is connected to the transfer bin outlet 2023 through a conveying pipe 204, the feed tank outlet 206 is connected to the feed port 31 of the feeding device, and a first opening and closing valve (not shown) is provided at the feed port 206 of the feed tank. The opening and closing of the first opening and closing valve can be linked to the vacuum pump state of the vacuum device main unit 201 to realize the loading and unloading of materials in the feed tank 205 of the vacuum feeding device 2. Specifically, the loading and unloading process of the feed tank 205 is as follows: the vacuum device main unit 201 controls the first opening and closing valve to close, and the vacuum pump in the vacuum device main unit 201 extracts the air in the feed tank 205 through the air pipe 203, so that a pressure difference is formed between the feeding transfer bin 202 and the feed tank 205, thereby realizing the transportation of materials from the feeding pipe 204 from bottom to top. The vacuum device main unit 201 is provided with a control module for adjusting the vacuuming time and pressure relief time of the vacuum feeding device 201, as well as the opening and closing of the first opening and closing valve; the vacuum feeding main unit 201 controls the first opening and closing valve to open, so that the material falls from the feed tank 205 into the feeding device 3 to realize unloading.

[0055] Reference Figures 1 to 5In a specific embodiment, the feeding device 4 includes a storage bin 302 and a conveying mechanism 33 arranged in sequence along the material conveying direction, the feeding port 301 of the storage bin (i.e., the feeding port 31 of the feeding device) is connected to the discharge port 206 of the feeding tank, and the discharge port 307 of the storage bin is connected to the feeding port of the conveying mechanism 33 (i.e., the feeding port 308 of the vibrating guide rail described later). The storage bin 302 is used to receive the material to be crushed from the vacuum feeding device 2 and quantitatively transmit the material to be crushed to the conveying mechanism 33; the discharge end of the conveying mechanism 33 (i.e., the discharge port 305 of the vibrating guide rail described later) is connected to the crushing device 4, and is used to convey the material to be crushed from the storage bin 302 to the crushing device 4. Therefore, the material to be crushed is quantitatively, evenly, and slowly conveyed to the crushing device 4 by the feeding device 4, which can prevent the material from directly entering the crushing device from the storage bin, resulting in material accumulation in the crushing device.

[0056] Reference Figure 4 In a specific embodiment, the storage bin 302 is composed of two inverted trapezoidal stainless steel bins, and the inner wall is provided with a coating; the side walls of the two stainless steel bins are all supported by aluminum alloy bin brackets on the working platform 1 and are located above the conveying mechanism 33, and weighing sensors (not shown) are respectively provided at the bottom of the four corners of the bin bracket (i.e., the bottom of the storage bin 302). A second opening and closing valve (not shown) electrically connected to the weighing sensor is also provided at the discharge port 307 of the storage bin, which can be linked with the weighing sensor for control; the weighing sensor is used to adjust the opening and closing degree of the second opening and closing valve according to the weight of the material to be crushed in the storage bin 302, so as to control the amount of material from the storage bin 302 falling on the vibrating guide rail 303, so as to realize the quantitative delivery of the material to be crushed from the storage bin 302 to the conveying mechanism 33, avoid the material falling on the vibrating guide rail in varying amounts, prevent material jamming, and improve the crushing efficiency. In addition, by configuring the storage bin 302 as two inverted trapezoidal stainless steel bins, the storage capacity of the storage bin can be increased; the inverted trapezoidal slope can also ensure the stable flow of materials without material accumulation.

[0057] Preferably, the inner wall coating of the storage bin 302 is polytetrafluoroethylene to prevent metal impurities from mixing in.

[0058] Preferably, the weighing sensor is a column type weighing sensor.

[0059] Continue to refer to Figures 1 to 5In a preferred embodiment, the conveying mechanism 33 is a vibrating conveying mechanism, including a vibrating guide rail 303 and a vibrator 304 placed at the bottom of the front end of the vibrating guide rail 303, the feed port 308 of the vibrating guide rail is connected to the second opening and closing valve at the discharge port 307 of the storage bin, the discharge port 305 of the vibrating guide rail is connected to the feed port 401 of the crushing device, and the conveying plane of the vibrating guide rail 303 is parallel to the working platform 1, so that the discharge port 305 of the vibrating guide rail is located above the feed port 401 of the crushing device, and the material is prevented from sliding into the crushing device 4 by itself when the vibrator 304 is not started. The vibrator 304 is used to control the vibration of the vibrating guide rail 303 so that the material to be crushed on the vibrating guide rail 303 is evenly conveyed to the crushing device 4. Specifically, the vibration frequency of the vibration guide rail 303 can be controlled by the vibrator 304 to adapt to materials with different characteristics. The vibration guide rail 303 is used to evenly transport the materials to the crushing device 4. The vibration guide rail 303 is vibrated by the vibrator 304 to disperse the materials on the vibration guide rail 303 to prevent material accumulation.

[0060] Preferably, a layer of soft silicone gasket (not shown) is used to separate the storage bin 302 and the vibration guide rail 304 at their intersection to prevent vibration from being transmitted to the storage bin 302 and causing resonance, thereby affecting the stability of the storage bin.

[0061] Preferably, the discharge port 305 of the vibrating guide rail adopts a rounded folded surface and extends into the crushing device 4, so as to achieve smooth transportation of materials.

[0062] Preferably, a dust cover is provided above the vibration guide rail 303, and the dust cover may be a transparent acrylic plate, thereby preventing dust pollution and monitoring the conveying status of the material.

[0063] In a specific embodiment, the crushing device includes a crusher 402, and the crusher 402 can be any one of a jaw crusher, a hammer crusher, an impact crusher, a cone crusher, and a roller crusher. The present invention is not limited to this, as long as the function of material crushing can be achieved.

[0064] Continue to refer to Figure 1 and Figures 5 to 7 In a specific embodiment, the screening device 5 includes a screen mechanism 6 which divides the screening device 5 into an upper screen layer 504 and a lower screen layer 506. The discharge port 403 of the crushing device is connected with the feed port 501 of the screening device located above the upper screen layer 504. The screen mechanism 6 is used to filter the sieveable powder to the lower screen layer 506. The upper screen material discharge port 502 is arranged on the side wall of the upper screen layer 504. The upper screen material discharge port 502 is connected with the transfer bin feed port 2022 of the feeding transfer bin 202, and is used to transport the unscreened material to the feed bin 205 of the vacuum feeding device 2 again. The entire process does not require manual screening and manual handling, which effectively improves production efficiency.

[0065] In a specific embodiment, the screening device 5 is a vibrating screen, and a vibration motor 508 is provided at the bottom (i.e., the bottom of the lower screen layer 506), and the screening device 5 is vibrated at a certain frequency by the vibration motor 508, so that the screening of the material can be accelerated. Alternatively, the screening device 5 can be other types of screening devices such as a fixed screen and a cylindrical screen, and the utility model is not limited thereto, as long as the screening function can be achieved.

[0066] Preferably, a vibration damping spring 509 for buffering vibration is provided on the vibration motor 508, and the vibration damping spring 509 is connected to the bottom of the lower screen layer 506. By providing the vibration damping spring 509, the vibration amplitude transmitted from the vibration motor 508 to the screening device can be reduced, and the noise generated during the vibration process of the screening device can be reduced.

[0067] See also Figure 7 In a specific embodiment, the screen mechanism 6 includes a screen 601 and a ball support plate 604 arranged at intervals below the screen 601. The screen 601 and the ball support plate 604 divide the interior of the screening device 5 into an upper screen layer 504 located above the screen 601, an intermediate layer 505 between the screen 601 and the ball support plate 604, and a lower screen layer 506 located below the ball support plate 604. Among them, the intermediate layer 505 is provided with a plurality of movable annular retaining rings 603 and a rollable support ball 602 arranged in the ring of the retaining ring 603. Therefore, during the vibration of the screening device 6, the support ball 602 of the intermediate layer 505 can be driven to continuously roll therein, and the support ball 602 can continuously contact and collide with the lower bottom surface of the screen 601 above the intermediate layer 505, thereby ejecting the powder that may be stuck in the mesh of the screen, preventing the mesh of the screen 601 from being blocked, resulting in reduced screening efficiency. In addition, by placing the ball 602 in the retaining ring 603, the range of movement of the ball 602 is controlled, and the ball 602 can be prevented from rolling to the edge of the middle layer. At the same time, the retaining ring 603 and the ball 602 of the middle layer 505 can also continuously push the siftable powder sieved by the screen 601 to the middle layer 505, so that the siftable powder can fall from the holes on the ball support plate to the under-sieve layer 506, and the powder can be collected to the external material holding device through the under-sieve material discharge port.

[0068] Preferably, the screen 601 can be replaced with screens of different mesh sizes to meet the requirements of powders with different particle sizes.

[0069] Preferably, the retaining ring 603 is a silicone ring, and the supporting ball 602 is a silicone ring. Selecting a softer silicone material can prevent the retaining ring 603 and the supporting ball 602 from scratching the screen and the supporting ball plate during movement and rolling.

[0070] In a specific embodiment, the bottom of the sieve layer 506 is a conical stainless steel bottom plate 507 with a relatively smooth surface. The powder falling from the sieve falls into the bottom plate and then slides to the edge of the bottom plate 507, so that the powder will not be deposited on the bottom plate 507, thereby improving the collection efficiency of the powder and thus improving the discharge rate.

[0071] Preferably, the storage bin 302, the conveying mechanism 33, the crushing device 4 and the screening device 5 are arranged in order from top to bottom. Thus, it is ensured that the material can gradually fall along the storage bin, the conveying mechanism, the crushing device and the screening device by its own gravity, so that there is no need to separately arrange independent transport devices (such as conveyor belts) between the devices as in the case of parallel arrangement of the devices, and the manufacturing cost of the circulating material crushing equipment can also be reduced.

[0072] The above is a detailed introduction to the scheme of the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model. Any equivalent structure or equivalent process transformation made by using the content of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

[0073] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that the particular features, structures, or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the application embodiments described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0074] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0075] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

Claims

1. A circulating material crushing equipment, characterized in that: include: A feeding device, a crushing device and a screening device are connected in sequence according to the material conveying direction, wherein the feeding device is used to quantitatively convey the material to be crushed to the crushing device, the crushing device is used to crush the material to be crushed, and the screening device is used to screen the siftable powder and the unsifted material and convey the unsifted material to the feeding device again, wherein The feeding device comprises a storage bin and a conveying mechanism arranged in sequence along the material conveying direction, the discharge port of the storage bin is connected to the feed port of the conveying mechanism, the storage bin is used to collect the material to be crushed and quantitatively transfer the material to be crushed to the conveying mechanism; the discharge port of the conveying mechanism is connected to the crushing device, and is used to transport the material to be crushed from the storage bin to the crushing device. The screening device comprises a screen mechanism for separating the screening device into an upper screen layer and a lower screen layer, the discharge port of the crushing device is connected with a feed port of the screening device located above the upper screen layer, the screen mechanism is used to filter the sieveable powder to the lower screen layer, the upper screen layer is also provided with an upper screen material discharge port, the upper screen material discharge port is connected with a feed port of the storage bin, and is used to transport the unscreened material to the storage bin again, The storage bin, the conveying mechanism, the crushing device and the screening device are arranged in sequence from top to bottom.

2. The circulating material crushing equipment according to claim 1 is characterized in that: The screen mechanism includes: a screen, and a ball-supporting plate arranged at intervals below the screen, wherein the screen and the ball-supporting plate divide the interior of the screening device into an upper screen layer located above the screen, an intermediate layer located between the screen and the ball-supporting plate, and a lower screen layer located below the ball-supporting plate; the intermediate layer is provided with a plurality of annular movable retaining rings and a rollable retaining ball arranged in the retaining ring, and the retaining ring is used to limit the range of movement of the retaining ball to prevent the retaining ball from rolling to the edge of the intermediate layer.

3. The circulating material crushing equipment according to claim 1 is characterized in that: The under-sieve layer of the screening device is provided with an under-sieve material discharge port, and the under-sieve material discharge port is used to transport the powder material of the under-sieve layer to an external material containing device.

4. The circulating material crushing equipment according to any one of claims 1 to 3, characterized in that: The screening device also includes a vibration motor arranged at the bottom of the lower screen layer.

5. The circulating material crushing equipment according to claim 1 is characterized in that: The circulating material pulverizing equipment further comprises a vacuum feeding device for conveying the material to be pulverized to the feeding device and conveying the unscreened material to the feeding device again. A feeding transfer bin is provided between the screen-surface material discharge port and the feed port of the vacuum feeding device. The feeding transfer bin has a transfer bin feeding port, a transfer bin feeding port and a transfer bin discharge port which are interconnected. The transfer bin feeding port is connected to the screen-surface material discharge port, and the transfer bin discharge port is connected to the feed port of the vacuum feeding device. The transfer bin feeding port is used for manually feeding the material to be crushed. The discharge port of the vacuum feeding device is communicated with the feed port of the storage bin.

6. The circulating material crushing equipment according to claim 5, characterized in that: The vacuum feeding device comprises: A vacuum device main unit and a feed tank, wherein the vacuum device main unit is connected to the feed tank through an air pipe, the feed port of the feed tank is connected to the discharge port of the transfer bin through a conveying pipe, the discharge port of the feed tank is connected to the feed port of the storage bin, and a first opening and closing valve is provided at the discharge port of the feed tank, and the first opening and closing valve is used to control the loading and unloading of the feed tank together with the vacuum device main unit.

7. The circulating material crushing equipment according to claim 1 is characterized in that: A weighing sensor is provided at the bottom of the storage bin, and the weighing sensor is used to monitor the weight of the material to be crushed in the storage bin; A second opening and closing valve electrically connected to the weighing sensor is also provided at the discharge port of the storage bin, and the weighing sensor is used to adjust the opening and closing degree of the second opening and closing valve according to the weight of the storage bin.

8. The circulating material crushing equipment according to claim 7 is characterized in that: The conveying mechanism includes a vibrator and a vibrating guide rail connected above the vibrator, the feed port of the vibrating guide rail is connected to the discharge port of the storage bin, the discharge port of the vibrating guide rail is connected to the crushing device, and the vibrator is used to control the vibration of the vibrating guide rail so that the material to be crushed on the vibrating guide rail is evenly conveyed to the crushing device.

9. The circulating material crushing equipment according to claim 8, characterized in that: A dust cover is provided above the vibration guide rail.

10. The circulating material crushing equipment according to claim 1, characterized in that: The crushing device is a crusher, and the crusher is one of a jaw crusher, a hammer crusher, an impact crusher, a cone crusher and a roller crusher.

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