Door cover assembly and ultra-low temperature freezing crusher

Abstract

The present disclosure provides a door cover assembly and an ultra-low temperature freezing pulverizer. The door cover assembly includes an inner cover and an outer cover. The outer cover is rotatably arranged on the outer shell of the ultra-low temperature freezing pulverizer and can be detachably sealed in the pulverizing chamber of the ultra-low temperature freezing pulverizer. A first discharge port is formed in the middle of the outer cover, and a second discharge port is formed at a position of the inner cover corresponding to the outer cover, and the first discharge port is connected to the pulverizing chamber through the second discharge port. The inner cover is clamped on the clamping table on the side of the outer cover facing the pulverizing chamber through the second discharge port; the orthographic projection area of ​​the inner cover is greater than or equal to the orthographic projection area of ​​the crushing moving knife of the ultra-low temperature freezing pulverizer, so that the inner cover completely blocks the crushing moving knife of the pulverizer. The door cover assembly, because the inner cover completely blocks the crushing moving knife of the pulverizer, reduces the gap between the inner cover and the crushing moving knife, prevents the heavy and substandard coarse particles from being thrown out, ensures the consistency of the particle size of the final pulverized material, improves the quality of the product during pulverization, and simplifies the installation difficulty of the inner cover.

Description

Technical Field

[0001] The present disclosure relates to the technical field of ultra-low temperature freezing pulverizers, and in particular to a door cover assembly and an ultra-low temperature freezing pulverizer. Background Art

[0002] The ultra-low temperature freezing pulverizer uses liquid nitrogen as a cold source. The material to be pulverized is cooled and embrittled at low temperature. The embrittled material enters the pulverizing chamber, and the knife disc in the pulverizing chamber rotates at a high speed, so that the material to be pulverized interacts with the blade to pulverize the material.

[0003] However, during the material crushing process, due to the unreasonable design of the door cover of the crushing chamber, when the door cover assembly is closed, the inner cover does not completely cover the crushing moving knife in the crushing chamber, causing the crushing moving knife to be at least partially exposed from the inner cover, resulting in a large gap (greater than 5mm) between the crushing moving knife and the inner cover. For details, please refer to Figure 4 When the crushing blade rotates, the materials to be crushed in the crushing chamber are subjected to the centrifugal effect of the rotation, which makes the coarse particles that are heavier and do not meet the standards more likely to be thrown out from the gap between the crushing blade and the inner cover, resulting in the presence of products with particle sizes that do not meet the process requirements in the final crushed materials, that is, there is a problem of uneven particle sizes, which reduces the quality of the product. In addition, the traditional inner cover is fixed by a threaded detachable method, which is difficult to install. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a door cover assembly and an ultra-low temperature freezing crusher that can reduce the gap between the crushing movable blade and the inner cover to prevent the coarse particles to be crushed from being thrown out from the gap between the crushing movable blade and the inner cover, thereby improving product quality and simplifying the difficulty of installing the inner cover.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A door cover assembly comprises an inner cover and an outer cover, wherein the outer cover is rotatably arranged on the outer shell of an ultra-low temperature freezing pulverizer and is detachably sealed in a pulverizing chamber of the ultra-low temperature freezing pulverizer, a first discharge port is formed in the middle of the outer cover, a second discharge port is formed at a position of the inner cover corresponding to the outer cover, and the first discharge port is communicated with the pulverizing chamber through the second discharge port,

[0007] The inner cover is clamped on the clamping platform on the side of the outer cover facing the crushing chamber through the second discharge port; the orthographic projection area of ​​the inner cover is greater than or equal to the orthographic projection area of ​​the crushing movable knife of the ultra-low temperature freezing crusher, so that the inner cover completely covers the crushing movable knife.

[0008] In one of the embodiments, a preset micro gap is formed between the outer periphery of the inner cover and the inner wall of the pulverizing chamber, and the preset micro gap is less than 5 mm.

[0009] In one of the embodiments, a multi-step boss is formed on a side of the inner cover facing the crushing movable blade.

[0010] In one embodiment, the multi-step boss is a three-step boss, a first boss of the three-step boss is arranged around the periphery of the second discharge port, and an inner side wall of the first boss is flush with an inner side wall of the second discharge port.

[0011] In one embodiment, the three-step boss includes the first boss, the second boss and the third boss connected in sequence, the height of the first boss is 2cm to 9cm, the height of the second boss is 2cm to 5cm; the height of the third boss is 1cm to 3cm.

[0012] In one embodiment, a first preset chamfer, a second preset chamfer and a third preset chamfer are formed at the peripheries of the first convex platform, the second convex platform and the third convex platform facing the pulverizing chamber, respectively.

[0013] In one embodiment, a plurality of positioning posts are formed on a side of the inner cover facing the outer cover, and a plurality of positioning holes are correspondingly formed on a side of the outer cover facing the inner cover, and each of the positioning posts is arranged in one-to-one correspondence with each of the positioning holes.

[0014] In one embodiment, a plurality of positioning posts are evenly distributed on a surface of the inner cover facing the outer cover.

[0015] In one embodiment, the positioning column and the inner cover are an integrally formed structure.

[0016] An ultra-low temperature freezing pulverizer comprises the door cover assembly described in any one of the above items.

[0017] A pulverizing device, including the door cover assembly and the ultra-low temperature freezing pulverizer according to any of the above embodiments, has at least the following advantages compared with the prior art:

[0018] 1) The inner cover is clamped on the clamping table on the side of the outer cover facing the crushing chamber through the second discharge port, which is convenient for the operator to disassemble and install the inner cover. At the same time, when used in conjunction with the outer cover, the inner cover can be well fixed to the end of the crushing moving knife. Compared with the traditional inner cover fixed in a detachable manner using threads, the difficulty of installing the inner cover is simplified.

[0019] 2) Since the orthographic projection area of ​​the inner cover is greater than or equal to the orthographic projection area of ​​the crushing movable knife of the ultra-low temperature freezing pulverizer, the inner cover completely covers the crushing movable knife. In this way, the gap between the inner cover and the crushing movable knife is reduced, and the coarse particles that are heavy and substandard are effectively blocked from being thrown out, thereby ensuring the consistency of the particle size of the final crushed material and the quality of the product during crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of an ultra-low temperature freezing pulverizer according to an embodiment of the present disclosure;

[0022] Figure 2 for Figure 1 A cross-sectional view of the ultra-low temperature freezing pulverizer in one direction shown;

[0023] Figure 3 for Figure 2 A schematic structural diagram of the inner cover of the door cover assembly shown;

[0024] Figure 4 It is a schematic diagram of the structure of the crushing moving blade and inner cover of a traditional ultra-low temperature freezing pulverizer;

[0025] Figure 5 The diagram is a structural diagram of the crushing moving blade and inner cover of the improved ultra-low temperature freezing pulverizer.

[0026] Figure numerals: 1. Ultra-low temperature freezing crusher; 10. Door cover assembly; 100. Inner cover; 110. Second discharge port; 120. Three-step boss; 121. First boss platform; 122. Second boss platform; 123. Third boss platform; 130. Positioning column; 200. Outer cover; 210. First discharge port; 220. Positioning hole; 20. Crushing moving knife; 30. Crushing chamber. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0031] like Figure 1 As shown, the present disclosure provides an ultra-low temperature freezing pulverizer 1, including a door cover assembly 10, an outer shell, a crushing movable blade 20 and a motor, wherein a crushing chamber 30 is formed in the outer shell; the crushing movable blade 20 is rotatably arranged in the crushing chamber 30; the door cover assembly 10 includes an inner cover 100 and an outer cover 200, and the outer cover 200 is rotatably arranged in the outer shell of the pulverizer; the crushing movable blade 20 includes a plurality of cutter discs.

[0032] During operation, first, the inner cover 100 is clamped on the clamping platform of the outer cover 200, and the multiple positioning columns 130 on the inner cover 100 are inserted into the multiple positioning holes 220 on the outer cover 200, and then the outer cover 200 arranged on the outer shell of the pulverizer is rotated to removably seal the pulverizing chamber 30 of the ultra-low temperature freezing pulverizer 1; then, liquid nitrogen is introduced to cool and embrittle the material to be pulverized, and the embrittled material to be pulverized is transported to the pulverizing chamber 30 formed in the outer shell, and the motor is started. The motor drives the multiple knife discs in the pulverizing chamber 30 to rotate at a high speed, and the material to be pulverized and the crushing moving knife 20 repeatedly impact, collide, shear and rub. During the material pulverizing process, the door cover assembly 10 plays a sealing effect, effectively preventing the material from being thrown out during pulverization; finally, the material to be pulverized is cut into the particle size of the required product to obtain a high-quality pulverized product.

[0033] like Figure 1 , Figure 2 and Figure 5As shown, a door cover assembly 10 of an embodiment includes an inner cover 100 and an outer cover 200, wherein the outer cover 200 is rotatably arranged on the outer shell of the ultra-low temperature freezing pulverizer 1, and is detachably sealed in the pulverizing chamber 30 of the ultra-low temperature freezing pulverizer 1, a first discharge port 210 is formed in the middle of the outer cover 200, a second discharge port 110 is formed at a position of the inner cover 100 corresponding to the outer cover 200, and the first discharge port 210 is connected with the pulverizing chamber 30 through the second discharge port 110, and the inner cover 100 is clamped on a clamping table on a side of the outer cover 200 facing the pulverizing chamber 30 through the second discharge port 110; the orthographic projection area of ​​the inner cover 100 is greater than or equal to the orthographic projection area of ​​the crushing movable knife 20 of the ultra-low temperature freezing pulverizer 1, so that the inner cover 100 completely blocks the crushing movable knife 20.

[0034] It can be understood that, since the outer cover 200 is rotatably arranged on the outer shell of the ultra-low temperature freezing pulverizer 1 and can be detachably sealed in the pulverizing chamber 30 of the ultra-low temperature freezing pulverizer 1, the operator can disassemble and assemble the outer cover 200 to realize the opening and sealing of the pulverizing chamber 30; and since the first discharge port 210 formed in the middle of the outer cover 200, the second discharge port 110 formed by the inner cover 100 and the pulverizing chamber 30 are connected, it is realized that the material after pulverization in the pulverizing chamber 30 can be discharged in sequence through the connected second discharge port 110 and the first discharge port 210; the inner cover 100 is clamped to the side of the outer cover 200 facing the pulverizing chamber 30 through the second discharge port 110. The clamping table does not need to be tightened by thread, which makes it convenient for the operator to disassemble and assemble the inner cover 100. At the same time, when used in conjunction with the outer cover 200, the inner cover 100 can be well fixed to the end of the crushing movable knife 20, simplifying the installation difficulty of the inner cover 100. Because the positive projection area of ​​the inner cover 100 is greater than or equal to the positive projection area of ​​the crushing movable knife 20 of the ultra-low temperature freezing crusher 1, the inner cover 100 completely blocks the crushing movable knife 20. In this way, the gap between the inner cover 100 and the crushing movable knife 20 is reduced, effectively preventing the heavy and substandard coarse particles from being thrown out, ensuring the consistency of the particle size of the final crushed material, and ensuring the quality of the product during crushing.

[0035] In one embodiment, a preset micro gap is formed between the outer periphery of the inner cover 100 and the inner wall of the crushing chamber 30, and the preset micro gap is less than 5 mm. It can be understood that in practical applications, when the preset micro gap is usually less than 5 mm, it is convenient for the operator to disassemble and assemble the inner cover 100 while ensuring that the inner cover 100 completely covers the crushing movable knife 20, and effectively avoids the problem that the edge of the inner cover 100 abuts against the inner wall of the crushing chamber 30 and causes difficulty in disassembly.

[0036] In one of the embodiments, a multi-step boss is formed on one side of the inner cover 100 facing the crushing movable blade 20, and the multi-step boss can fix the inner cover 100 and the end of the crushing movable blade 20; at the same time, the additional boss can ensure that a certain gap is left between the inner cover 100 and the crushing movable blade 20, so that on the one hand, it is convenient for the operator to disassemble and assemble the inner cover 100; on the other hand, it prevents the crushing movable blade 20 from damaging the inner cover 100 when it rotates.

[0037] like Figure 2 and Figure 3 As shown, in one embodiment, the multi-step boss is a three-step boss 120, and the first boss 121 of the three-step boss 120 is arranged around the periphery of the second discharge port 110, and the inner side wall of the first boss 121 is flush with the inner side wall of the second discharge port 110. It can be understood that the first boss 121 of the three-step boss 120 is used to fix the end of the crushing movable knife 20 during installation; because the inner side wall of the first boss 121 is flush with the inner side wall of the second discharge port 110, it is effectively avoided that the inner side wall of the first boss 121 is not flush with the inner side wall of the second discharge port 110 to cause a depression and block the discharge, ensuring that the crushed material can be discharged from the second discharge port 110 more comprehensively and smoothly, and reducing the phenomenon of material adhering to the inner wall of the first boss 121.

[0038] In one embodiment, the three-step boss 120 includes the first boss 121, the second boss 122 and the third boss 123 connected in sequence, the height of the first boss 121 is 2cm to 9cm, the height of the second boss 122 is 2cm to 5cm; the height of the third boss 123 is 1cm to 3cm.

[0039] It can be understood that although the additional three-step boss 120 is convenient for the operator to disassemble and assemble, and is beneficial to protecting the inner cover 100. However, if the height of the three-step boss 120 is set unreasonably, it is easy to cause the gap between the inner cover 100 and the crushing movable knife 20 after installation to become larger, and there is still a phenomenon that heavy and substandard coarse particles are thrown out from the gap. Therefore, in the present disclosure, by setting the height of the first boss 121 to 2cm~9cm; the height of the second boss 122 to 2cm~5cm, and the height of the third boss 123 to 1cm~3cm, it is ensured that the gap between the inner cover 100 and the crushing movable knife 20 after installation will not be too large, while facilitating the operator to disassemble and assemble, it also more comprehensively prevents the phenomenon that heavy and substandard coarse particles are thrown out.

[0040] In one embodiment, the first convex platform 121, the second convex platform 122 and the third convex platform 123 are respectively formed with a first preset chamfer, a second preset chamfer and a third preset chamfer at the periphery of the side facing the crushing chamber 30. The added first preset chamfer, the second preset chamfer and the third preset chamfer, on the one hand, effectively prevent the operator's hands from being easily scratched when the inner cover 100 is connected to the outer cover 200, and on the other hand, reduce the wear of the inner cover 100 and the crushing movable knife 20 during installation, thereby affecting the service life of the inner cover 100 and the crushing movable knife 20.

[0041] like Figure 1 As shown, in one embodiment, a plurality of positioning posts 130 are formed on one side of the inner cover 100 facing the outer cover 200, and a plurality of positioning holes 220 are correspondingly formed on one side of the outer cover 200 facing the inner cover 100, and each of the positioning posts 130 is arranged in a one-to-one correspondence with each of the positioning holes 220. It can be understood that the plurality of positioning posts 130 on the inner cover 100 and the plurality of positioning holes 220 on the outer cover 200 are adapted to each other, and when the material is crushed, the plurality of positioning posts 130 on the inner cover 100 are plugged into the plurality of positioning holes 220 on the outer cover 200 in a one-to-one correspondence, so as to ensure the fastening of the outer cover 200 and the inner cover 100, and reduce the loosening of the inner cover 100 and the outer cover 200 during operation.

[0042] In one embodiment, a plurality of positioning posts 130 are evenly distributed on a surface of the inner cover 100 facing the outer cover 200. It can be understood that the plurality of positioning posts 130 are evenly spaced around the circumference of the surface of the inner cover 100 facing the outer cover 200 and the plurality of positioning posts 130 are plugged into the plurality of positioning holes 220 on the outer cover 200 corresponding to each other, which effectively avoids the problem of the outer cover 200 and the inner cover 100 being loosened due to uneven force when the grinder is working. Specifically, the plurality of positioning posts 130 may be four.

[0043] In one embodiment, the positioning post 130 and the inner cover 100 are integrally formed to improve the firmness of the connection between the positioning post 130 and the inner cover 100 , thereby increasing the service life of the inner cover 100 .

[0044] Compared with the prior art, the present invention has at least the following advantages:

[0045] 1) The inner cover 100 is clamped on the clamping table of the side of the outer cover 200 facing the crushing chamber 30 through the second discharge port 110, which is convenient for the operator to disassemble and assemble the inner cover 100. At the same time, with the use of the outer cover 200, the inner cover 100 can be well fixed to the end of the crushing movable knife 20. Compared with the traditional inner cover 100 fixed in a detachable manner using threads, the installation difficulty of the inner cover 100 is simplified.

[0046] 2) Since the orthographic projection area of ​​the inner cover 100 is greater than or equal to the orthographic projection area of ​​the crushing movable blade 20 of the ultra-low temperature freezing pulverizer 1, the inner cover 100 completely covers the crushing movable blade 20. In this way, the gap between the inner cover 100 and the crushing movable blade 20 is reduced, and the coarse particles that are heavy and substandard are effectively blocked from being thrown out, thereby ensuring the consistency of the particle size of the final crushed material and the quality of the product during crushing.

[0047] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A door cover assembly, comprising an inner cover and an outer cover, wherein the outer cover is rotatably arranged on the outer shell of an ultra-low temperature freezing pulverizer and can be detachably sealed in the pulverizing chamber of the ultra-low temperature freezing pulverizer, a first discharge port is formed in the middle of the outer cover, a second discharge port is formed at a position of the inner cover corresponding to the outer cover, and the first discharge port is communicated with the pulverizing chamber through the second discharge port, characterized in that: The inner cover is clamped on the clamping platform on the side of the outer cover facing the crushing chamber through the second discharge port; the orthographic projection area of ​​the inner cover is greater than or equal to the orthographic projection area of ​​the crushing movable knife of the ultra-low temperature freezing crusher, so that the inner cover completely covers the crushing movable knife.

2. The door cover assembly according to claim 1, characterized in that: A preset micro gap is formed between the outer periphery of the inner cover and the inner wall of the pulverizing chamber, and the preset micro gap is less than 5 mm.

3. The door cover assembly according to claim 2, characterized in that: A multi-step boss is formed on a side of the inner cover facing the crushing movable knife.

4. The door cover assembly according to claim 3, characterized in that: The multi-step boss is a three-step boss, a first boss of the three-step boss is arranged around the periphery of the second discharge port, and an inner side wall of the first boss is flush with an inner side wall of the second discharge port.

5. The door cover assembly according to claim 4, characterized in that: The three-step boss includes the first boss, the second boss and the third boss connected in sequence, the height of the first boss is 2cm to 9cm, the height of the second boss is 2cm to 5cm; the height of the third boss is 1cm to 3cm.

6. The door cover assembly according to claim 5, characterized in that: A first preset chamfer, a second preset chamfer and a third preset chamfer are respectively formed at the peripheries of the first convex platform, the second convex platform and the third convex platform facing the pulverizing chamber.

7. The door cover assembly according to claim 1, characterized in that: A plurality of positioning posts are formed on a side of the inner cover facing the outer cover, and a plurality of positioning holes are correspondingly formed on a side of the outer cover facing the inner cover, and each of the positioning posts is arranged in one-to-one correspondence with each of the positioning holes.

8. The door cover assembly according to claim 7, characterized in that: A plurality of positioning posts are evenly distributed on a surface of the inner cover facing the outer cover.

9. The door cover assembly according to claim 8, characterized in that: The positioning column and the inner cover are an integrally formed structure.

10. An ultra-low temperature freezing pulverizer, characterized in that: A door cover assembly comprising any one of claims 1 to 9.

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