Discharge port structure of large mining mill

Abstract

A discharge port structure of a large mining mill comprises a mill with a discharge pipe, the discharge end of the discharge pipe is connected with a discharge flared pipe through a fastener, and an inner cavity of the discharge flared pipe is connected with a discharge port lining plate through a fastener; wherein the discharge port lining plate is provided with an outer connecting ring, an inner flow-isolating ring and a flow-isolating plate fixed between the outer connecting ring and the inner flow-isolating ring, and the outer connecting ring is attached to the inner wall of the discharge flared tube; a first drainage cavity communicated with the discharging pipe is formed in the inner side of the inner flow-resistant ring, and a second drainage cavity communicated with the discharging pipe is formed between the outer connecting ring and the inner flow-resistant ring. According to the discharge port structure of the large mining mill, the discharge port lining plate is arranged at the discharge port, so that materials can be buffered and blocked, and the impact of the materials on external equipment can be effectively reduced; in addition, the lengths of the discharge port and the blind plate of the drum screen are indirectly shortened, and the occupied space is small.

Description

Technical Field

[0001] The invention relates to the technical field of mills, in particular to a discharge port structure of a large-scale mining mill. Background Art

[0002] With the continuous development of industrialization, energy is increasingly scarce. In order to effectively improve the utilization rate of energy, the specifications of mining mills are gradually developing towards large-scale. However, the discharge particle size of large mills is relatively large. When the material is discharged from the mill, it has a greater impact on the related parts connected to the discharge port, resulting in a shortened service life. The material discharged from the conventional discharge port has a faster flow rate, which has a greater impact on the drum screen and vibrating screen of the next process, greatly shortening the service life.

[0003] At present, there are the following problems when using conventional discharge ports: 1. At present, the conventional discharge port has a steep discharge slope, and the material passes through at a high speed, which has a great impact on the drum screen and vibrating screen in the next process. If the discharge port slope is changed, the layout space of the equipment will be increased, resulting in a significant increase in costs; 2. At present, there is no barrier device at the conventional discharge port. During the discharge process, some materials splash onto the drum screen and vibrating screen of the next process, which increases the impact force exponentially and even causes abnormal damage to related equipment; 3. At present, the conventional discharge port has a fast discharge speed, which has a great impact on the downstream drum screen and vibrating screen. In order to increase the life of the drum screen, the conventional practice is to increase the length of the drum screen blind plate, which in turn increases the size of the drum screen, and the corresponding layout space will also increase, affecting the product and construction costs. Summary of the invention

[0004] The purpose of the present invention is to propose a discharge port structure for a large-scale mining mill. A discharge port liner is arranged at the discharge port to buffer and block the material, and can effectively reduce the impact of the material on external equipment; in addition, it also indirectly shortens the length of the discharge port and the cylindrical screen blind plate, and occupies less space.

[0005] The technical solution adopted by the present invention is: a large-scale mining mill discharge port structure, comprising a mill with a discharge pipe, the discharge end of the discharge pipe is connected to a discharge bell pipe through a fastener, and the inner cavity of the discharge bell pipe is connected to a material port liner through a fastener; The discharge port lining plate comprises an outer connecting ring, an inner baffle ring and a flow partition plate fixed therebetween, and the outer connecting ring fits the inner wall of the discharge bell pipe; A first drainage cavity connected to the discharge pipe is formed on the inner side of the inner baffle ring, and a second drainage cavity connected to the discharge pipe is formed between the outer connecting ring and the inner baffle ring; the inner baffle ring and the flow partition plate buffer and guide the materials passing through the first drainage cavity and the second drainage cavity.

[0006] As a preferred solution, the outer connecting ring is in a conical ring shape, and the inner diameter of one end thereof close to the discharge pipe is smaller than the inner diameter of the other end.

[0007] As a preferred solution, the inner flow-blocking ring is in a conical ring shape, and the inner diameter of one end thereof close to the discharge pipe is smaller than the inner diameter of the other end.

[0008] As a preferred solution, the difference in inner diameters between the outer connecting ring and the inner flow-blocking ring at an end close to the discharge pipe is greater than the difference in inner diameters between the ends away from the discharge pipe.

[0009] As a preferred embodiment, one end of the inner flow-blocking ring extends to the inner cavity of the discharge pipe.

[0010] As a preferred solution, the discharge port lining is provided with bolt holes which sequentially penetrate the outer connecting ring, the flow partition plate and the inner flow blocking ring, and the fasteners pass through the bolt holes to be connected with the discharge bell pipe.

[0011] As a preferred solution, the discharge port liner is formed by splicing a plurality of liner plates, and each liner plate has at least one flow partition.

[0012] As a preferred solution, the flow partition is in the shape of a plate and is located on the axial section of the outer connecting ring.

[0013] As a preferred solution, the inner wall of the discharge pipe is provided with an inner lining layer connected to the discharge port lining plate, and the inner wall of the inner lining layer is fixed with a spiral protrusion.

[0014] As a preferred solution, the flow partition is spiral-shaped, dividing the second drainage cavity into spiral cavities.

[0015] The beneficial effects of the present invention are: Based on the defects of the prior art, a large-scale mining mill discharge port structure is provided. Compared with the existing discharge port structure: 1. The discharge port lining can buffer and block the material, effectively reduce the impact of the material on the equipment and increase the service life of the equipment.

[0016] 2. When the material passes through the first discharge cavity and the second discharge cavity, the internal baffle ring and the flow partition plate change the discharge trajectory, reduce the impact force, and increase the discharge stability.

[0017] 3. The discharge port lining is set inside the discharge bell pipe and can be disassembled together with the discharge bell pipe, or it can be replaced and maintained separately.

[0018] 4. It does not take up space while ensuring the buffering effect. There is no need to change the slope of the discharge port or increase the length of the blind plate of the drum screen, and the cost of use is low.

[0019] 5. The discharge port lining adopts a spliced ​​structure. The weight of a single lining is small, which is convenient for installation in the discharge bell pipe. At the same time, the damaged single lining can be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A cross-sectional schematic diagram of the present invention at one angle; Figure 2 A cross-sectional schematic diagram of another angle of the present invention as a whole; Figure 3 A schematic diagram of a discharge port lining plate of the present invention at one angle; Figure 4 A schematic diagram of another angle of the discharge port lining plate of the present invention; Figure 5 A schematic diagram of a single liner of the present invention; Figure 6 is a schematic diagram of a spiral flow partition of the present invention; Figure 7 Schematic diagram of the inner lining layer of the present invention.

[0022] Figure numerals: 1. discharge port lining, 101. external connecting ring, 102. internal baffle ring, 103. flow divider, 2. discharge bell pipe, 3. fastener, 4. discharge pipe, 5. first discharge cavity, 6. second discharge cavity, 7. inner lining layer, 701. spiral protrusion. DETAILED DESCRIPTION

[0023] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0024] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this document shall have the usual meanings understood by people with ordinary skills in the field to which the invention belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of the present invention do not express quantity restrictions, but indicate the existence of at least one; the words "first", "second" and "third" used in this document shall not be regarded as restrictions on the order of components, but are only used to distinguish different components; words such as "include" or "comprise" and the like indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.

[0025] In order to more clearly describe the specific structural composition of the discharge port structure of a large mining mill, combined with the attached Figure 1-7 Describe this embodiment: like Figure 1 or Figure 2 As shown, a discharge port structure of a large-scale mining mill includes a mill with a discharge pipe 4, the discharge end of the discharge pipe 4 is connected to a discharge bell pipe 2 via a fastener, and the inner cavity of the discharge bell pipe 2 is connected to a discharge port liner 1 providing buffering and diversion effects when the material passes through via a fastener 3; the discharge port liner 1 can buffer and block large pieces of material, can effectively reduce the impact of large pieces of material on equipment such as drum screens, extend the service life of equipment such as drum screens, shorten the maintenance time of the mill, and improve the mill operation rate.

[0026] The discharge port lining plate 1 comprises an outer connecting ring 101, an inner baffle ring 102 and a flow partition 103 fixed therebetween. The outer connecting ring 101 fits the inner wall of the discharge bell tube 2. The inner side of the inner baffle ring 102 forms a first discharge cavity 5 connected to the discharge pipe 4. The outer connecting ring 101 and the inner baffle ring 102 form a second discharge cavity 6 connected to the discharge pipe 4. The inner baffle ring 102 and the flow partition 103 buffer and guide the materials passing through the first discharge cavity 5 and the second discharge cavity 6. When the materials are discharged through the discharge bell tube 2, they are divided into the first discharge cavity 5 and the second discharge cavity 6. The discharge trajectory is changed by the inner baffle ring 102 and the flow partition 103, and the impact of the materials on the subsequent drum screen and other equipment is reduced, thereby increasing the discharge stability.

[0027] The size and specific dimensions of the discharge cavity of the discharge port liner can be designed according to the actual discharge needs on site to adapt to various process requirements.

[0028] In the above embodiment, the outer connecting ring 101 is in the shape of a cone ring, and the inner diameter of one end close to the discharge pipe 4 is smaller than the inner diameter of the other end; the inner flow resistance ring 102 is in the shape of a cone ring, and the inner diameter of one end close to the discharge pipe 4 is smaller than the inner diameter of the other end. The large diameter of the outlet end is conducive to the smooth discharge of materials. The inner flow resistance ring 102 is in the shape of a cone ring, and the actual taper ratio can be 1:1 to 1:4.

[0029] The outer connecting ring 101 fits the inner wall of the discharge bell pipe 2 to prevent the material from directly contacting the discharge bell pipe 2. The discharge bell pipe 2 provides an installation carrier, and the discharge port lining plate 1 is set to be impact-resistant or a low-cost structure. The discharge port lining plate 1 is mainly replaced and maintained in the later stage.

[0030] In the above embodiment, the difference in inner diameters of the outer connection ring 101 and the inner baffle ring 102 close to the discharge pipe 4 is greater than the difference in inner diameters of the two ends away from the discharge pipe 4. That is, the inlet end of the second discharge chamber 6 is wider than the outlet end, so that the chamber of the second discharge chamber 6 is variable, thereby further improving the effect of buffering and blocking materials, optimizing the stability of discharge, and the size and angle of the inner baffle ring 102 can also be adjusted according to actual conditions to adapt to various process requirements.

[0031] During specific configuration, one end of the inner flow blocking ring 102 may be extended to the inner cavity of the discharge pipe 4 .

[0032] In the above embodiment, the discharge port lining plate 1 is provided with bolt holes which sequentially penetrate the outer connection ring 101, the flow partition 103 and the inner flow blocking ring 102, and the fastener 3 passes through the bolt hole to be connected with the discharge bell pipe 2. The fastener 3 can be a bolt and nut assembly, and the fastener passes through the flow partition 103. On the one hand, the fastener can be hidden and not contact with the material, and on the other hand, it is more stable during installation.

[0033] like Figure 3 or Figure 4 As shown, in order to facilitate the processing and installation of the discharge port lining plate, multiple lining plates are spliced ​​into a discharge port lining plate 1. A single lining plate is as shown in FIG. Figure 5 As shown, the lining plate 1 is divided at equal angles along the center line of the discharge port, and each lining plate has at least one flow partition 103.

[0034] For details, see Figure 4 The flow partition 103 is in the shape of a plate and is located on the axial section of the outer connecting ring 101. The flow partition 103 has the function of connecting the outer connecting ring 101 and the inner flow blocking ring 102, and at the same time divides the second discharge cavity 6 into a plurality of chambers, which are straight chambers, to guide the disorderly moving materials and alleviate the impact force.

[0035] See also Figure 6 ,and Figure 4The difference from the embodiment is that the flow partition 103 can also be spiral-shaped, dividing the second discharge chamber 6 into spiral chambers, which has a better buffering effect on the material passing through the second discharge chamber 6 and can increase a certain discharge speed.

[0036] Specifically, the discharge pipe 4 is rotatably connected to the discharge port of the mill.

[0037] like Figure 1 , Figure 2 As shown, in order to avoid excessive impact of materials and improve durability, an inner lining layer 7 connected to the discharge port lining plate 1 is provided on the inner wall of the discharge pipe 4. The material enters the discharge port lining plate 1 through the inner lining layer 7, which plays a role in protecting the discharge pipe 4, reducing the impact on the discharge pipe 4 itself, and facilitating replacement and maintenance.

[0038] like Figure 7 As shown, a spiral protrusion 701 can be fixed on the inner wall of the lining layer 7. After the material enters the inner cavity of the lining layer 7, it contacts the spiral protrusion 701, driving the lining layer 7 and the discharge pipe 4 to rotate relative to the discharge port of the mill. The pitch and number of the spiral protrusions 701 are designed according to the process requirements, and the discharge speed is adjusted. This can better adapt to the spiral cavity structure of the second discharge cavity 6, and at the same time improve the discharge speed, buffer the material and extend the service life of the equipment.

[0039] The parts not described in detail in this embodiment are prior art.

[0040] It should be noted that although the present invention is described by the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope of protection of the appended claims of the present invention and their equivalents.

Claims

1. A large-scale mining mill discharge port structure, comprising a mill having a discharge pipe (4), characterized in that: The discharge end of the discharge pipe (4) is connected to a discharge bell pipe (2) via a fastener, and the inner cavity of the discharge bell pipe (2) is connected to a discharge port lining plate (1) via a fastener; The discharge port lining plate (1) comprises an outer connecting ring (101), an inner flow blocking ring (102), and a flow dividing plate (103) fixed therebetween, and the outer connecting ring (101) fits against the inner wall of the discharge bell pipe (2); A first drainage cavity (5) connected to the discharge pipe (4) is formed on the inner side of the inner baffle ring (102), and a second drainage cavity (6) connected to the discharge pipe (4) is formed between the outer connection ring (101) and the inner baffle ring (102); the inner baffle ring (102) and the flow partition (103) buffer the material passing through the first drainage cavity (5) and the second drainage cavity (6).

2. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The outer connecting ring (101) is in the shape of a cone, and the inner diameter of one end thereof close to the discharge pipe (4) is smaller than the inner diameter of the other end.

3. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The inner flow-blocking ring (102) is in the shape of a cone, and the inner diameter of one end thereof close to the discharge pipe (4) is smaller than the inner diameter of the other end.

4. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The difference in inner diameters between the outer connecting ring (101) and the inner flow blocking ring (102) at the end close to the discharge pipe (4) is greater than the difference in inner diameters between the ends away from the discharge pipe (4).

5. The large-scale mining mill discharge port structure according to claim 1 is characterized in that: One end of the inner flow-blocking ring (102) extends to the inner cavity of the discharge pipe (4).

6. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The discharge port lining plate (1) is provided with bolt holes which sequentially penetrate the outer connection ring (101), the flow partition plate (103) and the inner flow blocking ring (102), and the fasteners pass through the bolt holes to be connected to the discharge bell pipe (2).

7. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The discharge port lining plate (1) is formed by splicing a plurality of lining plates, and each lining plate has at least one flow partition plate (103).

8. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The flow partition (103) is in the shape of a plate and is located on the axial section of the outer connecting ring (101).

9. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The inner wall of the discharge pipe (4) is provided with an inner lining layer (7) connected to the discharge port lining plate (1), and a spiral protrusion (701) is fixed to the inner wall of the inner lining layer (7).

10. A large-scale mining mill discharge port structure according to claim 1, characterized in that: The flow partition (103) is spiral-shaped and divides the second drainage cavity (6) into spiral cavities.

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