CN114151098B - Auxiliary slag raking equipment of tunnel boring machine for rapidly cleaning slag stones at edges of tunnel - Google Patents

Abstract

The invention belongs to the technical field of tunnel construction, and specifically relates to a tunnel boring machine auxiliary rake equipment for quickly cleaning tunnel edge debris. The invention has a bucket-like structure, including side baffles, rear baffles, bottom shoveling plates, a bottom shoveling upper slope and a bottom shoveling downward slope; a plurality of upper slopes are rollingly connected to the front upward slope of the bottom plate. Slope rollers, a number of inclined downslope rollers are rollingly connected to the downslope surface of the bottom plate; the left and right sides of the tunnel boring machine are detachably connected with auxiliary raking equipment. As the tunnel boring machine moves the slag bucket, Pushing forward, the slag enters the upper slope of the bottom plate and moves along the upper slope of the bottom plate under the action of the uphill roller, and then slides along the rolling direction of the downhill roller to tunnel excavation under the action of the downhill roller. on the scraping board of the machine. The invention rakes the debris at the two legs of the tunnel to the vicinity of the star wheel of the slag shoveling plate of the tunnel boring machine, so that the debris at the two legs of the tunnel can be cleaned simultaneously in real time during the shoveling of the tunnel boring machine.

Description

A kind of tunnel boring machine auxiliary rake equipment for quickly cleaning the debris at the foot of the tunnel

Technical field

The invention belongs to the technical field of tunnel construction, and specifically relates to a tunnel boring machine auxiliary rake equipment for quickly cleaning tunnel edge debris.

Background technique

In recent years, with the large-scale construction of infrastructure projects in our country, more and more tunnels are under construction in our country. Tunnel construction has the characteristics of high construction cost and long construction period. The main reasons for this situation are: low rock breaking efficiency and slag discharge speed. Slow, slow support speed, loose connection between various processes, etc. Among them, the slag discharge efficiency has an important impact on the efficiency of tunnel construction. At present, the proportion of mechanical excavation in tunnel construction is getting higher and higher. Mechanical excavation usually uses tunnel boring machines, and its slag discharge system includes slag scraping boards, slag scrapers and transport belts. This type of tunnel boring machine mainly introduces the technology of coal mine tunnel boring machines, which has become mature in the field of coal mine tunnel boring. However, the rock mass characteristics of tunnel boring are often different from those of coal mine tunnel boring. The strata where coal mines are mined are coal-bearing strata, and the rock mass is relatively hard. During the tunnel excavation process, the rock mass is broken and formed into blocks. The shovel plate at the bottom of the tunnel boring machine can usually clean up the debris from the tunneling head in time. The strength of the rock mass in tunnel projects varies greatly. For weak rock masses, small fragments will be formed after breaking. The tunnel sections of each project are different, and the slag scraping board of the tunnel boring machine often cannot be completely removed due to its own size. The debris at both ends of the tunnel requires manual cleaning, which is labor-intensive and time-consuming, seriously restricting tunnel excavation efficiency.

Contents of the invention

The invention aims to solve the problem that the existing tunnel boring machine shovel board cannot clean the debris at the two legs of the tunnel, resulting in the need for manual cleaning, which is labor-intensive and time-consuming and seriously restricts the tunnel excavation efficiency. It provides a tunnel that can quickly clean the debris at the tunnel edges. Tunnel boring machine auxiliary rake equipment.

The present invention adopts the following technical solution to realize: a tunnel boring machine auxiliary rake equipment for quickly cleaning tunnel edge debris, which is a bucket-shaped structure. The auxiliary rake equipment includes side baffles, rear baffles, Bottom shovel plate, bottom shovel upper slope and bottom shovel downward slope;

The upper slope surface of the bottom plate and the lower slope surface of the bottom plate are three-dimensional curved surfaces. The upper slope surface of the bottom plate, the lower slope surface of the bottom plate, the bottom shovel plate and the rear baffle are connected in sequence from front to back. The side baffles It is located on the left side of the rear baffle, the bottom shovel plate, the upper slope of the bottom plate and the lower slope of the bottom plate; there are a number of uphill rollers rolling on the upper slope in front of the bottom plate, and rolling on the lower slope of the bottom plate. Connected with a number of inclined downhill surface rollers;

The left and right sides of the tunnel boring machine are detachably connected with auxiliary slag rake equipment. As the slag bucket of the tunnel boring machine advances forward, the slag enters the bottom plate and is shoveled up the slope under the action of the upslope rollers. It moves along the upslope of the bottom plate and then enters the downslope of the bottom plate. Under the action of the downhill roller, the slag slides to the slag plate of the tunnel boring machine along the rolling direction of the downhill roller, and is placed on the tunnel boring machine. It is transported to the slag discharge equipment under the movement of the star wheel of the tunnel boring machine.

Further, the curved surface equation of the upper slope surface of the bottom plate is: , where H is the height of the highest point on the slope above the bottom plate, L3 is the length of the auxiliary rake equipment, L1 is the horizontal distance between the highest point of the slope and the front edge of the auxiliary rake equipment, h1 is the length of the front edge of the auxiliary rake equipment. high.

Further, the curved surface equation of the downward slope surface of the bottom plate is: , where H is the height of the highest point on the slope below the bottom plate, L3 is the length of the auxiliary rake equipment, L2 is the horizontal distance between the highest point on the slope and the end of the slope below the bottom plate, and L1 is the distance between the highest point on the slope and the auxiliary raking equipment. The horizontal distance from the front edge of the slag rake equipment, h2 is the height of the end of the lower slope of the bottom plate.

Further, the upslope roller is 5 mm higher than the surface of the upslope in front of the bottom plate, and the axis of the upslope roller is parallel to the front edge of the auxiliary slag rake equipment.

Further, the downslope roller is 5 mm higher than the surface of the downslope surface of the bottom plate, and the angle between the axis of the downslope roller and the front edge of the auxiliary rake equipment is 25 degrees.

Further, a rear baffle bolt hole is provided on the rear baffle away from the side baffle, and the rear baffle bolt hole is connected to the bottom plate of the tunnel boring machine's slag scraping plate through bolts.

Further, a rear baffle bolt hole is provided on the side of the bottom shovel plate away from the side baffle, and the rear baffle bolt hole is connected to the back baffle of the tunnel boring machine's slag shovel plate through bolts.

Furthermore, this application has multiple specifications, and the lengths of different specifications are different.

The beneficial effects of the present invention compared with the prior art:

1. The present invention has a simple structure, low processing difficulty, low cost, easy installation, strong adaptability to tunnel boring machines, and is convenient for rapid processing and promotion;

2. When the invention is used, it is installed on the slag shoveling plate of the tunnel boring machine, and cleverly utilizes the forward thrust of the tunnel boring machine to transport the slag first to the curved surface of the upper slope of the bottom plate, and on the upper slope. With the help of the rollers, it moves to the rear of the equipment, and then enters the curved surface of the downhill slope of the bottom plate to shovel slag, and uses the downslope rollers to transfer the slag to the tunnel boring machine shovel plate star wheel for slag discharge under the action of its own weight. At the same time, the debris at both feet of the tunnel can be cleaned in real time and simultaneously to achieve real-time full cleaning of debris in the entire tunnel excavation section;

3. The present invention is installed on both sides of the tunnel boring machine's shoveling plate through bolted connections, and the present invention has a variety of length specifications and can be quickly replaced during use to adapt to different tunnel sections;

It can be seen that in the present invention, by installing this equipment on both sides of the tunnel boring machine, the debris on both sides of the tunnel is raked to the vicinity of the star wheel of the shoveling plate of the tunnel boring machine, and the debris is transferred to the slag discharge system through the star wheel, and the tunnel During the shoveling process of the tunnel boring machine, the debris on both sides of the tunnel can be cleaned simultaneously in real time; the installation process is simple and easy to use. By widening the shovel plate at the bottom of the tunnel boring machine, it can be accurately and timely adjusted according to the width of the tunnel and the width of the shovel plate of the tunnel boring machine. Shoveling slag thus solves the problem that the tunnel boring machine shovel plate is too small to clean the debris at both ends of the tunnel, and can quickly and easily clean the tunnel slag, which can greatly shorten the tunnel construction period under the conditions of tight schedule and limited operating space. Improve construction time, improve construction efficiency, and save construction funds.

Description of drawings

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

Figure 2 is a cross-sectional view of the curved surface of the upper slope of the bottom plate and the lower slope of the bottom plate in the xy plane;

Figure 3 is a schematic diagram of the curved surface of the upper slope of the bottom plate and the lower slope of the bottom plate in the xyz coordinate system;

Figure 4 shows the walking trajectory of the debris;

In the picture: 1-side baffle, 2-rear baffle, 3-bottom shoveling plate, 4-bottom shoveling upslope, 5-bottom shoveling downslope, 6-rear baffle bolt hole, 7-bottom plate Bolt holes, 8-uphill roller, 9-downhill roller.

Detailed ways

The implementation of the present invention is described below with specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to coordinate with the content disclosed in the specification for the understanding and reading of those familiar with this technology, and are not used to limit the implementation of the present invention. Restrictive conditions, so they have no technical substantive significance. Any structural modifications, changes in proportions, or adjustments in size should still fall within the scope of the present invention as long as they do not affect the effects that the present invention can produce and the purposes that can be achieved. Within the scope of the technical content disclosed. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for convenience of description and are not used to limit the scope of this specification. The scope of the invention that can be implemented, and changes or adjustments in their relative relationships, as long as there is no substantial change in the technical content, shall also be regarded as the scope of the invention that can be implemented.

Referring to Figures 1 to 4, the present invention provides a technical solution: a tunnel boring machine auxiliary rake device for quickly cleaning tunnel edge debris. It has a bucket-shaped structure. The auxiliary rake device includes side blocks connected as one body. Plate 1, rear baffle 2, bottom shovel plate 3, bottom shovel upper slope 4 and bottom shovel downslope 5;

The upper slope surface 4 of the bottom plate and the lower slope 5 of the bottom plate are three-dimensional curved surfaces. The upper slope 4 and the lower slope 5 of the bottom plate, the bottom shovel plate 3 and the rear baffle 2 are sequentially from front to back. Connected to the rear, the side baffle 1 is provided on the left side of the rear baffle 2, the bottom shovel plate 3, the bottom shovel upper slope 4 and the bottom shovel downslope 5; there are several upper slopes 4 rollingly connected to the bottom front. The slope roller 8 is rollingly connected to a number of inclined downward slope rollers 9 arranged on the lower slope surface 5 of the bottom plate;

The left and right sides of the tunnel boring machine are detachably connected with auxiliary slag rake equipment. As the slag bucket of the tunnel boring machine advances, the slag enters the upper slope 4 of the bottom plate and then moves on the upper slope roller 8. Under the influence of the action, the slag moves along the upper slope 4 of the bottom plate and then enters the lower slope 5 of the bottom plate. Under the action of the downhill roller 9, the slag slides along the rolling direction of the downhill roller 9 to the slag shovel of the tunnel boring machine. on the board and transported to the slag discharge equipment under the motion of the star wheel of the tunnel boring machine.

The curved surface equation of the upper slope surface 4 of the bottom plate is: , where H is the height of the highest point of the upper slope surface 4 of the bottom plate (that is, H is the height of the connection between the upper slope 4 of the bottom plate and the lower slope 5 of the bottom plate), L3 is the length of the auxiliary rake equipment, L1 is the horizontal distance between the highest point of the slope and the front edge of the auxiliary rake equipment, h1 is the height of the front edge of the auxiliary rake equipment, that is, the height of the front end of the slope 4 on the bottom plate for scraping.

The curved surface equation of the bottom plate slag shoveling downhill surface 5 is: , where H is the height of the highest point of the bottom slag shoveling lower slope 5 (that is, H is the height of the connection between the bottom slag shoveling upper slope 4 and the bottom slag shoveling lower slope 5), L3 is the length of the auxiliary raking equipment, L2 is the horizontal distance between the highest point of the slope and the end of the lower slope 5 of the bottom plate, L1 is the horizontal distance between the highest point of the slope and the front edge of the auxiliary rake equipment, h2 is the height of the end of the lower slope 5 of the bottom plate.

The force monitoring during the shoveling process of the tunnel boring machine shows that the maximum thrust of the large debris on the shovel plate depends on the slope of the shovel plate. Based on the force fitting of the large debris in the movement of the shovel plate, it is necessary to make the large debris can To successfully enter the slag shoveling device, the horizontal component of the force between the slag and the shovel plate must be less than the maximum thrust. According to this, based on the equation of fitting thrust, reducing the size of the slag rake equipment requires reducing the friction between the slag and the bottom plate. For this reason, on the basis of considering the small friction resistance, the multiple points between the slag and the roller during the movement of the slag are Starting from the mechanical characteristics of the hinge and considering the three-dimensional dimensions, the equation of the slope surface of the shovel plate is obtained through analysis and fitting: , based on the smooth coupling of surfaces, the equation of the downslope surface is obtained .

Normally, the values of L1, L2, L3, h1, h2 and H are based on the size of the tunnel boring machine bucket. The value of h1 is the thickness of the front plate of the shovel plate. The value of h2 is the thickness of the steel plate at the end of the shovel plate. H is usually Take 20cm, L1 takes 30cm, L2 takes 40cm, and L3 is the length of the slag shoveling auxiliary equipment that needs to be widened.

The upslope roller 8 is 5mm higher than the surface of the upslope 4 in front of the base plate, and the axis of the upslope roller 8 is parallel to the front edge of the auxiliary raking equipment.

The downslope roller 9 is 5mm higher than the surface of the bottom slag scraping downslope 5, and the angle between the axis of the downslope roller 9 and the front edge of the auxiliary slag rake equipment is 25 degrees.

The rear baffle 2 is provided with a rear baffle bolt hole 6 at a position away from the side baffle 1. The rear baffle bolt hole 6 is connected to the bottom plate of the tunnel boring machine's slag scraping plate through bolts.

A rear baffle bolt hole 7 is provided on the side of the bottom shovel plate 3 away from the side baffle 1, and the rear baffle bolt hole 7 is connected with the back baffle of the tunnel boring machine's slag shovel board through bolts.

The side baffle 1 of the present application is a flat plate with two straight sides and one curved edge, the rear baffle 2 is a rectangular plate, and the bottom shovel plate 3 is a flat plate.

The upslope surface 4 in front of the base plate of this application is first high and then low from front to back. The debris that needs to be cleaned is from the upslope surface 4 in front of the base plate and the downslope surface 5 of the bottom plate, and the rollers 8 on the upslope surface and the downslope surface It slides along the slope to the top of the slope under the sliding action of the surface roller 9, and slides along the roller to the edge of the shovel due to the effect of its own weight.

This application has a variety of specifications, and the lengths of different specifications are different, so as to adapt to different tunnel sections.

Working principle of the invention:

During the slag shoveling work, when the tunnel boring machine's slag shoveling bucket moves forward, the slag moves along the front upslope 4 of the bottom plate to the top of the slope under the rolling action of the upslope rollers 8, and then moves on the rear slope rollers. Under the auxiliary action of 9, it slides along the rolling direction of the rear slope roller 9 to the part where the application is connected to the slag shoveling plate of the tunnel boring machine, and then is transported to the slag discharge equipment under the stirring of the star wheel.

The above embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (7)

1. Auxiliary slag raking equipment of tunnel boring machine for rapidly cleaning slag stones at edges of tunnels is characterized in that: the auxiliary slag raking equipment is of a bucket-shaped structure and comprises a side baffle (1), a rear baffle (2), a bottom shovel plate (3), a bottom shovel slag upper slope (4) and a bottom shovel slag lower slope (5) which are connected into a whole;

the bottom plate shovel slag upper slope (4) and the bottom plate shovel slag lower slope (5) are three-dimensional curved surfaces, the bottom plate shovel slag upper slope (4), the bottom plate shovel slag lower slope (5), the bottom shovel plate (3) and the rear baffle (2) are sequentially connected from front to back, and the side baffle (1) is arranged on the left side of the rear baffle (2), the bottom shovel plate (3), the bottom plate shovel slag upper slope (4) and the bottom plate shovel slag lower slope (5); a plurality of upper slope surface rollers (8) are connected on the front upper slope surface (4) of the bottom plate in a rolling way, and a plurality of obliquely arranged lower slope surface rollers (9) are connected on the slag shoveling lower slope surface (5) of the bottom plate in a rolling way;

the left side and the right side of the tunnel boring machine are all detachably connected with auxiliary slag raking equipment, slag stones enter the bottom plate slag shoveling upper slope (4) and then move along the bottom plate slag shoveling upper slope (4) under the action of the upper slope roller (8) along with the forward pushing of the slag shoveling hopper of the tunnel boring machine, then enter the bottom plate slag shoveling lower slope (5), slide onto a slag shoveling plate of the tunnel boring machine along the rolling direction of the lower slope roller (9) under the action of the lower slope roller (9), and are conveyed to slag discharging equipment under the stirring of star wheels of the tunnel boring machine.

2. The auxiliary slag raking device for a tunnel boring machine for rapidly cleaning the side slag stones of a tunnel according to claim 1, wherein: the curved surface equation of the slope surface (4) on the bottom plate shovel slag isWherein H is the height of the highest point of the slope (4) on the bottom plate shovel slag, L3 is the length of the auxiliary slag raking equipment, L1 is the horizontal distance from the highest point of the slope to the front edge of the auxiliary slag raking equipment, and H1 is the height of the front edge of the auxiliary slag raking equipment.

3. The auxiliary slag raking device for a tunnel boring machine for rapidly cleaning the side slag stones of a tunnel according to claim 2, wherein: the curved surface equation of the bottom plate shovel slag slope (5) isWherein H is the height of the highest point of the bottom plate slag shoveling slope surface (5), L3 is the length of the auxiliary slag raking equipment, L2 is the horizontal distance between the highest point of the slope surface and the tail end of the bottom plate slag shoveling slope surface (5), L1 is the horizontal distance between the highest point of the slope surface and the front edge of the auxiliary slag raking equipment, and H2 is the height of the tail end of the bottom plate slag shoveling slope surface (5).

4. A tunnel boring machine auxiliary slag raking device for rapidly cleaning tunnel side slag stones according to any one of claims 1-3, wherein: the upper slope surface roller (8) is 5mm higher than the surface of the upper slope surface (4) in front of the bottom plate, and the axis of the upper slope surface roller (8) is parallel to the front edge of the auxiliary slag raking equipment.

5. The auxiliary slag raking device for the tunnel boring machine for rapidly cleaning the side slag stones of the tunnel according to claim 4, wherein: the downward slope surface roller (9) is 5mm higher than the surface of the bottom plate slag shoveling downward slope surface (5), and the included angle between the axis of the downward slope surface roller (9) and the front edge of the auxiliary slag raking equipment is 25 degrees.

6. The auxiliary slag raking device for the tunnel boring machine for rapidly cleaning the side slag stones of the tunnel according to claim 5, wherein: the rear baffle (2) is provided with a rear baffle bolt hole (6) far away from the side baffle (1), and the rear baffle bolt hole (6) is connected with a bottom plate of a slag shoveling plate of the tunnel boring machine through bolts.

7. The auxiliary slag raking device for the tunnel boring machine for rapidly cleaning the side slag stones of the tunnel according to claim 6, wherein: and a rear baffle bolt hole (7) is formed in one side, far away from the side baffle (1), of the bottom shovel plate (3), and the rear baffle bolt hole (7) is connected with a rear baffle of a slag shovel plate of the tunnel boring machine through a bolt.