Polygonal secondary crushing device of muddy water heading machine

Abstract

The utility model discloses a polygonal secondary crushing device of a muddy water heading machine, which comprises a shell and a cutterhead, a driving shaft connected with the cutterhead is arranged in the shell, the cutterhead comprises a cutterhead panel arranged at the front end of the shell, the polygonal secondary crushing device further comprises a primary crushing mechanism and a secondary crushing mechanism which are arranged in the shell, and the primary crushing mechanism comprises a large end and a small end. The small end of the primary crushing mechanism is fixedly connected to the back face of the cutterhead panel and is coaxially arranged with the cutterhead panel, a soil bin is arranged in the front end of the shell, a first crushing space is formed between the inner side face of the soil bin and the outer side face of the primary crushing mechanism, and the large end of the primary crushing mechanism is fixedly connected with the secondary crushing mechanism. A polygonal columnar hole with a certain width is formed in the rear end of the soil bin, the number of the edges of the polygonal columnar hole is the same as that of the edges of the polygonal columnar hole, and a second crushing space is formed between the inner side face of the polygonal columnar hole and the outer side face of the secondary crushing mechanism. When the device is used, the structure is simple, the manufacturing cost is low, and meanwhile, the effect of crushing large-particle pebbles and gravels is excellent.

Description

Technical Field

[0001] The utility model relates to the technical field of roadheader equipment, in particular to a polygonal secondary crushing device for a slurry shield tunneling machine. Background Art

[0002] At present, for the secondary crushing device of a roadheader, one uses an eccentric cutter head to rotate and crush stones, and the other uses a cutter head on an eccentric shaft to perform eccentric rotation to crush stones. These two types of roadheaders are either too complex in structure, difficult to process, and too high in manufacturing cost, or they do not have a secondary crushing function, or the effect of the secondary crushing function is not good.

[0003] Therefore, it is necessary to provide a polygonal secondary crushing device for a slurry shield tunneling machine to solve the above technical problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a polygonal secondary crushing device for a slurry shield tunneling machine aiming at the deficiencies of the existing technology, which not only has a simple structure and a relatively low manufacturing cost, but also has an excellent crushing effect.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A polygonal secondary crushing device for a slurry shield tunneling machine includes a housing and a cutter head. A drive shaft connecting the cutter head is arranged inside the housing. The cutter head includes a cutter head panel arranged at the front end of the housing. It also includes a primary crushing mechanism and a secondary crushing mechanism arranged inside the housing. The primary crushing mechanism is in the shape of a regular polygonal cone, including a large end and a small end. The small end of the primary crushing mechanism is fixedly connected to the back of the cutter head panel and is coaxially arranged with the cutter head panel. There is a soil bin inside the front end of the housing, and the inner wall of the soil bin is in the shape of a regular polygonal horn. A first crushing space is formed between the inner side surface of the soil bin and the outer side surface of the primary crushing mechanism. The large end of the primary crushing mechanism is connected and fixed to the secondary crushing mechanism. The secondary crushing mechanism is in the shape of a regular polygonal panel. The end surface of the large end of the primary crushing mechanism coincides with the end surface of the secondary crushing mechanism. There is a polygonal columnar hole with the same number of sides as the soil bin and a certain width at the rear end of the soil bin. A second crushing space is formed between the inner side surface of the polygonal columnar hole and the outer side surface of the secondary crushing mechanism.

[0007] Preferably, the first crushing space is a plurality of spaces that are sequentially distributed along the circumferential direction of the primary crushing mechanism and are interconnected. The drive shaft drives the primary crushing mechanism to rotate, and the plurality of spaces gradually become smaller or larger in sequence along the rotation direction of the primary crushing mechanism.

[0008] Preferably, the second crushing space is a plurality of spaces that are sequentially distributed along the circumferential direction of the secondary crushing mechanism and are interconnected. The drive shaft drives the secondary crushing mechanism to rotate, and the plurality of spaces gradually become smaller or larger in sequence along the rotation direction of the secondary crushing mechanism.

[0009] Preferably, a plurality of grid plates are further arranged in the housing. The grid plates are located on the right side of the rear end of the polygonal columnar holes. The plurality of grid plates are radially arranged in a radial pattern inside the housing and are fixedly welded to the inner wall of the housing. Grid slots are provided between adjacent grid plates, and the number of grid slots is an integer multiple of the number of sides of the polygonal columnar holes.

[0010] Preferably, a partition plate is arranged inside the rear end of the housing. A muddy water chamber is provided between the partition plate and the grid plates. A sludge discharge pipe penetrating the partition plate is arranged in the muddy water chamber.

[0011] Preferably, a sludge scraping and stirring wing is arranged at the rear end of the secondary crushing mechanism. The sludge scraping and stirring wing has an L-shaped structure and includes a long side and a short side. One end of the short side is fixedly connected to the secondary crushing mechanism, and the long side extends into the muddy water chamber through the grid slot. The width of the grid slot is greater than the width of the sludge scraping and stirring wing.

[0012] Preferably, the number of sides of the secondary crushing mechanism is an even number and is proportional to the diameter of the housing. The number of sides of the secondary crushing mechanism is not less than 6. The number of sides of the polygonal columnar holes must be two more than the number of sides of the secondary crushing mechanism.

[0013] Preferably, the width of the polygonal columnar holes is greater than the width of the secondary crushing mechanism, and the diameter of the circumscribed circle of the secondary crushing mechanism is smaller than the diameter of the inscribed circle of the polygonal columnar holes.

[0014] Preferably, the flared opening of the soil bin is arranged towards the small end of the primary crushing mechanism, and the inclination angle of the inner wall of the soil bin is 20°.

[0015] Preferably, the cutter head panel is provided with slag inlet openings.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] A first crushing space is formed between the primary crushing mechanism and the soil bin. Large-sized pebbles and gravel are fed into the first crushing space. The primary crushing mechanism rotates, causing the space area of each space in the first crushing space to continuously change, successively from large to small or from small to large, to achieve the first crushing of the pebbles and gravel, forming small-sized pebbles and gravel. Then, the small-sized pebbles and gravel are fed into the second crushing space formed between the secondary crushing mechanism and the polygonal columnar holes. The secondary crushing mechanism rotates, causing the space area of each space in the second crushing space to successively change from large to small or from small to large, to achieve the second crushing of the pebbles and gravel. The goal of secondary crushing is effectively achieved through a simple structure, the crushing is more thorough, and the slag discharge efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the cutter head connecting the drive shaft;

[0020] Figure 3 is Figure 2 the top view of;

[0021] Figure 4 It is a schematic structural diagram of the front end of the housing;

[0022] Figure 5 It is a schematic structural diagram of the rear end of the housing;

[0023] Figure 6 It is the front view of the housing;

[0024] Figure 7 It is the sectional view of the present utility model;

[0025] Among them, 1 - housing, 2 - cutter head, 3 - drive shaft, 4 - cutter head panel, 5 - slag inlet, 6 - primary crushing mechanism, 7 - secondary crushing mechanism, 8 - soil bin, 9 - first crushing space, 10 - polygonal columnar hole, 11 - second crushing space, 12 - grid plate, 13 - partition plate, 14 - mud water bin, 15 - mud discharge pipe, 16 - mud scraping and stirring wing Specific embodiments

[0026] The following further clarifies the present utility model in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. After reading the present utility model, various equivalent forms of modification by those skilled in the art fall within the scope defined by the appended claims of this application.

[0027] In the present utility model, unless otherwise clearly specified and defined, terms such as "installation", "setting", "connection", "fixed connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] In the present utility model, terms such as "upper", "lower", "bottom", "top", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only relationship terms determined for the convenience of describing the structural relationship of each component or element of the present utility model, and do not specifically refer to any component or element in the present utility model, and should not be construed as a limitation to the present utility model.

[0029] Such as Figures 1 to 7As shown in the figure, a polygonal secondary crushing device for a slurry shield tunneling machine includes a housing 1 and a cutter head 2. A drive shaft 3 connecting the cutter head is arranged inside the housing. The cutter head includes a cutter head panel 4 provided at the front end of the housing. The cutter head panel is provided with a slag inlet 5. It also includes a primary crushing mechanism 6 and a secondary crushing mechanism 7 installed inside the housing. The primary crushing mechanism is a regular polygonal cone, including a large end and a small end. The small end of the primary crushing mechanism is fixedly connected to the back of the cutter head panel and is coaxially arranged with the cutter head panel. Inside the front end of the housing, there is a soil bin 8. The inner wall of the soil bin is in the shape of a regular polygonal trumpet, and the trumpet mouth of the soil bin faces the small end of the primary crushing mechanism. The inclination angle of the inner wall of the soil bin is 20°. A first crushing space 9 is formed between the inner side of the soil bin and the outer side of the primary crushing mechanism. The first crushing space is a plurality of spaces that are sequentially distributed along the circumference of the primary crushing mechanism and are interconnected. The drive shaft drives the primary crushing mechanism to rotate. Along the rotation direction of the primary crushing mechanism, the plurality of spaces gradually become smaller or larger in sequence. The large end of the primary crushing mechanism is connected and fixed to the secondary crushing mechanism. The secondary crushing mechanism is in the shape of a regular polygonal panel. The end face of the large end of the primary crushing mechanism coincides with the end face of the secondary crushing mechanism. At the rear end of the soil bin, there is a polygonal columnar hole 10 with the same number of sides as the soil bin and a certain width. The number of sides of the secondary crushing mechanism is even and is proportional to the diameter of the housing. The number of sides of the polygonal columnar hole must be two more than the number of sides of the secondary crushing mechanism. In this embodiment, the number of sides of the secondary crushing mechanism is eight, and the number of sides of the polygonal columnar hole is ten. A second crushing space 11 is formed between the inner side of the polygonal columnar hole and the outer side of the secondary crushing mechanism. The width of the polygonal columnar hole is greater than the width of the secondary crushing mechanism. The diameter of the circumcircle of the secondary crushing mechanism is smaller than the diameter of the incircle of the polygonal columnar hole. The second crushing space is a plurality of spaces that are sequentially distributed along the circumference of the secondary crushing mechanism and are interconnected. The drive shaft drives the secondary crushing mechanism to rotate. Along the rotation direction of the secondary crushing mechanism, the plurality of spaces gradually become smaller or larger in sequence. Forty grid plates 12 are also installed inside the housing. The grid plates are located on the right side of the rear end of the polygonal columnar hole. The forty grid plates are radially arranged in a radial pattern inside the housing and are welded and fixed to the inner wall of the housing. There are grid notches between adjacent grid plates. The number of grid notches is an integer multiple of the number of sides of the polygonal columnar hole. Inside the rear end of the housing, a partition plate 13 is installed. A slurry chamber 14 is provided between the partition plate and the grid plates. A sludge discharge pipe 15 passing through the partition plate is provided inside the slurry chamber. A sludge scraping and stirring wing 16 is installed at the rear end of the secondary crushing mechanism. The sludge scraping and stirring wing is in an L-shaped structure, including a long side and a short side. One end of the short side is welded and fixed to the secondary crushing mechanism. The long side passes through the grid notch and extends into the slurry chamber. The width of the grid notch is greater than the width of the sludge scraping and stirring wing.

[0030] Principle and usage method of a polygonal secondary crushing device for a slurry shield tunneling machine: When the tunneling machine is working, large-sized pebbles and gravel enter the first crushing space through the slag inlet on the cutter head panel. The drive shaft drives the entire cutter head to rotate. When the primary crushing mechanism rotates, the spaces in the first crushing space change in sequence from large to small or from small to large along the rotation direction of the primary crushing mechanism. During the change process of each space, the large-sized pebbles and gravel are crushed for the first time. The pebbles and gravel after the first crushing are sent to the second crushing space. The spaces in the second crushing space change in sequence from large to small or from small to large along the rotation direction of the secondary crushing mechanism, and the pebbles and gravel are crushed for the second time until the crushed pebbles and gravel are rolled into even smaller sizes that can enter the slurry sump through the grid notch. Under the action of high-pressure water, they are stirred by the mud scraping and stirring blades in the slurry sump and then discharged through the mud discharge pipe.

[0031] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A polygonal secondary crushing device for a muddy water tunnel boring machine, comprising a housing (1) and a cutter disc (2), wherein a drive shaft (3) connected to the cutter disc is arranged in the housing, and the cutter disc comprises a cutter disc panel (4) arranged at the front end of the housing, characterized in that: The housing also includes a primary crushing mechanism (6) and a secondary crushing mechanism (7) disposed inside the housing. The primary crushing mechanism is in the shape of a regular polygonal cone and includes a large end and a small end. The small end of the primary crushing mechanism is fixedly connected to the back of the cutter head panel and is coaxially arranged with the cutter head panel. A soil bin (8) is disposed inside the front end of the housing. The inner wall of the soil bin is in the shape of a regular polygonal trumpet. A first crushing space (9) is formed between the inner side surface of the soil bin and the outer side surface of the primary crushing mechanism. The large end of the primary crushing mechanism is connected and fixed to the secondary crushing mechanism. The secondary crushing mechanism is in the shape of a regular polygonal panel. The large end of the primary crushing mechanism is fixed to the secondary crushing mechanism. The end face of the soil bin coincides with the end face of the secondary crushing mechanism, a polygonal columnar hole (10) having the same number of sides and a certain width as the end face of the soil bin is provided at the rear end, a second crushing space (11) is formed between the inner side of the polygonal columnar hole and the outer side of the secondary crushing mechanism, the first crushing space is a plurality of spaces distributed in sequence along the circumference of the primary crushing mechanism and connected to each other, the driving shaft drives the primary crushing mechanism to rotate, and the plurality of spaces change from large to small or from small to large in sequence along the rotation direction of the primary crushing mechanism, the second crushing space is a plurality of spaces distributed in sequence along the circumference of the secondary crushing mechanism and connected to each other The driving shaft drives the secondary crushing mechanism to rotate, and the multiple spaces change from large to small or from small to large in the direction of rotation of the secondary crushing mechanism. The shell is also provided with multiple grid plates (12), the grid plates are located on the right side of the rear end of the polygonal columnar hole, and the multiple grid plates are radially arranged inside the shell and welded to the inner wall of the shell. There are grid slots between adjacent grid plates, and the number of grid slots is an integer multiple of the number of sides of the polygonal columnar hole. A partition plate (13) is provided inside the rear end of the shell, and a mud and water bin is provided between the partition plate and the grid plate. There is a through-partitioning bin in the mud and water bin. The rear end of the secondary crushing mechanism is provided with a scraper stirring wing (16), the scraper stirring wing is L-shaped, including a long side and a short side, one end of the short side is fixedly connected to the secondary crushing mechanism, and the long side extends through the grille slot to the mud and water bin (14), the width of the grille slot is greater than the width of the scraper stirring wing, the number of sides of the secondary crushing mechanism is an even number and is proportional to the diameter of the shell, the number of sides of the secondary crushing mechanism is not less than 6, the number of sides of the polygonal columnar hole must be two more than the number of sides of the secondary crushing mechanism, and the cutter head panel is provided with a slag inlet (5).

2. According to the polygonal secondary crushing device of the muddy water tunnel boring machine according to claim 1, it is characterized in that: The width of the polygonal columnar hole is greater than the width of the secondary crushing mechanism, and the diameter of the circumscribed circle of the secondary crushing mechanism is smaller than the diameter of the inscribed circle of the polygonal columnar hole.

3. According to the polygonal secondary crushing device of a muddy water tunnel boring machine according to claim 1, it is characterized in that: The bell mouth of the soil bin is arranged toward the small end of the primary crushing mechanism, and the inclination angle of the inner wall of the soil bin is 20°.

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