Pea gravel discharging device for TBM construction hydraulic reclamation

Abstract

The utility model discloses a pea gravel blanking device for TBM (Tunnel Boring Machine) construction hydraulic reclamation, which relates to the field of constructional engineering material transportation and comprises a stock bin, a conical hopper is arranged at a discharge port at the lower end of the stock bin, a valve for controlling the opening degree of a blanking channel is arranged at a discharge port at the lower end of the conical hopper, and a conveying belt is arranged below the valve. The tail end of the conveying belt is connected with a conveying pipe, the tail end of the conveying pipe extends to the position over the pea gravel tank, and a material detector used for monitoring the pea gravel falling condition of a discharging opening of the conical hopper is arranged between the valve and the conveying belt. A plurality of hobs arranged in an array mode are arranged in the material conveying pipe, a filter plate is arranged below the hobs, and a crushing chamber with the variable height is formed between the hobs and the filter plate. The material detector is arranged to be matched with the hob and the filter plate, so that grading treatment of the pea gravels is achieved, the problem of blockage of the discharge port is solved, it is ensured that the particle size of the pea gravels is within a proper range, and the hydraulic reclamation construction requirement is met.

Description

Technical Field

[0001] The utility model relates to the field of construction engineering material transportation, in particular to a pea gravel feeding device for TBM construction filling. Background Art

[0002] The traditional method of vertical transportation of pea gravel during TBM construction relies on a gantry crane. This traditional method involves lifting the pea gravel tank from underground to the surface for loading and then lifting it back underground.

[0003] According to the relevant construction process requirements, the pea gravel filled between the tunnel and the segment gap needs to meet a suitable particle size range. However, at present, the existing pea gravel feeding device generally does not screen and control the grading of pea gravel. In addition, in the pea gravel transportation method different from the traditional gantry crane, the blockage problem has not been well solved, and the problem is usually solved by manual dredging, which wastes labor resources and is time-consuming and labor-intensive. Therefore, we propose a pea gravel feeding device for TBM construction. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned prior art, the utility model provides a pea gravel feeding device for TBM construction filling.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pea gravel feeding device for TBM construction filling, comprising a silo, a conical hopper is installed at the lower end discharge port of the silo, a valve for controlling the opening size of the feeding channel is arranged at the lower end discharge port of the conical hopper, a conveyor belt is arranged below the valve, a feeding pipe is connected to the end of the conveyor belt, the end of the feeding pipe extends to just above the pea gravel tank, a material detector for monitoring the falling of pea gravel at the discharge port of the conical hopper is arranged between the valve and the conveyor belt; a plurality of rollers arranged in an array are arranged inside the feeding pipe, a filter plate is arranged below the roller, and a height-variable crushing chamber is formed between the roller and the filter plate.

[0006] Preferably, a vibrator is installed on the outer side wall of the silo.

[0007] Preferably, the four corners of the lower end of the filter plate are rotatably connected to support rods, and the other ends of the support rods are rotatably connected to the inner wall of the feed pipe, and the four support rods form a parallelogram structure.

[0008] Preferably, a flexible plate is installed at one end of the filter plate close to the conical hopper, and the flexible plate is made of flexible material.

[0009] Preferably, the flexible plate is provided with a protruding portion protruding upward, and the protruding portion is made of a hard material.

[0010] Preferably, an electric cylinder is installed at the lower end of the material delivery pipe, and the piston rod of the electric cylinder penetrates the lower wall of the material delivery pipe and is fixedly connected to the raised portion.

[0011] Preferably, the valve consists of two valve plates; the two valve plates are fixedly connected with a driving gear and a driven gear through a short shaft, and one end of the short shaft is movably connected to the outer wall of the conical hopper, the driving gear and the driven gear are meshingly connected, and the outer wall of the conical hopper is also fixedly installed with a mounting seat, and an electric telescopic rod is rotatably installed on the mounting seat, and the piston rod of the electric telescopic rod is rotatably connected to one of the valve plates.

[0012] Preferably, a connecting shaft passes through two adjacent front and rear support rods, a third sprocket is fixedly sleeved on the connecting shaft, and a synchronous chain is sleeved between the two third sprockets; a second sprocket is also fixedly sleeved on one of the connecting shafts, a first sprocket is also fixedly sleeved on the short shaft to which the driving gear is fixedly sleeved, and a transmission chain is sleeved between the first sprocket and the second sprocket.

[0013] Compared with the prior art, the utility model provides a pea gravel feeding device for TBM construction, which has the following beneficial effects:

[0014] (1) The pea gravel is crushed by setting a roller cutter, and the pea gravel that meets the requirements of the filling construction process passes through the filter holes on the filter plate, thereby achieving particle size classification of the pea gravel, ensuring that the particle size of the pea gravel entering the pea gravel tank is within a suitable range, meeting the filling construction requirements.

[0015] (2) A material detector is set up to monitor whether the conical hopper outlet is blocked. When blockage occurs, the height of the crushing chamber between the filter plate and the roller is reduced to meet the crushing needs of the larger bean gravel that arrives at the crushing chamber. When no blockage occurs, the crushing chamber between the filter plate and the roller shares part of the grading work, thereby improving the screening efficiency of the bean gravel.

[0016] (3) The raised portion is provided to guide part of the pea gravel to contact the upper area of ​​the roller cutter, thereby increasing the contact area between the roller cutter and the pea gravel and improving the crushing efficiency of the roller cutter.

[0017] (4) The opening change of the conical hopper discharge port and the height change of the crushing chamber are driven by the same power source, which saves manufacturing costs and improves practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of the entire pea gravel feeding device in the embodiment;

[0020] Figure 2 It is a schematic diagram of the assembly of the conical hopper in the embodiment;

[0021] Figure 3 This is a schematic diagram of the assembly of the material detector in the embodiment;

[0022] Figure 4 It is a partial cross-sectional schematic diagram of the material delivery pipe in the embodiment;

[0023] Figure 5 It is a schematic diagram of the assembly of the filter plate in the embodiment;

[0024] Figure 6 It is a schematic diagram of the assembly of the protrusion in the embodiment.

[0025] In the figure: 1. silo; 2. conical hopper; 3. valve plate; 31. driving gear; 311. first sprocket; 312. second sprocket; 313. transmission chain; 32. driven gear; 33. electric telescopic rod; 34. mounting seat; 4. conveyor belt; 5. feed pipe; 51. upper lining plate; 52. arc-shaped recessed area; 6. pea gravel tank; 7. material detector; 8. hob; 9. filter plate; 91. support rod; 92. third sprocket; 93. synchronous chain; 10. flexible plate; 11. raised part; 12. electric cylinder. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, rather than all the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the utility model.

[0027] This embodiment provides a pea gravel feeding device for TBM construction. Figures 1 to 6As shown, it includes a silo 1 erected at a high position, the interior of the silo 1 is filled with unscreened pea gravel, a conical hopper 2 is installed at the lower end discharge port of the silo 1, and a valve for controlling the opening size of the discharge channel is provided at the lower end discharge port of the conical hopper 2. In this embodiment, the valve is composed of two valve plates 3, and the two valve plates 3 are rotated away from each other so that the opening of the discharge port is increased, a conveyor belt 4 is arranged below the valve, and a feed pipe 5 is connected to the end of the conveyor belt 4, and the end of the feed pipe 5 extends to the top of the pea gravel tank 6. The pea gravel tank 6 is arranged at a low position, and the pea gravel stored in the silo 1 passes through the conveyor belt 4 and the feed pipe 5 in turn, and finally falls into the pea gravel tank 6, and then the pea gravel tank 6 is hoisted back to the well by the gantry crane device. The material discharge speed is controlled by adjusting the opening of the discharge port of the conical hopper 2. If the opening of the discharge port is too large, the material discharge speed is fast, which may easily cause blockage of the discharge port. Therefore, a material detector 7 is arranged between the valve and the conveyor belt 4 to monitor the falling of bean gravel at the discharge port of the conical hopper 2. The material detector 7 is fixedly mounted on the support frame of the silo 1. If the material detector 7 does not detect the falling of bean gravel within a certain time period (the period is set to ten seconds in this embodiment), it is determined that the discharge port of the conical hopper 2 is blocked. At this time, the two valve plates 3 are driven by external force to move away synchronously, so that the valve opening of the conical hopper 2 is increased until the bean gravel blockage problem is solved.

[0028] On the basis of the above scheme, a vibrator (not shown in the figure) is installed on the outer wall of the silo 1. When the material detector 7 fails to detect the passage of pea gravel for more than ten seconds, it indicates that the pea gravel is blocked. The vibrator is started to accelerate the dredging efficiency of the blocked part under the action of vibration. It should be noted that the material detector 7 and the vibrator are both currently known devices. Since they are not the focus of the technical solution to be protected by this application, they will not be described in detail.

[0029] In addition, in practical applications, the bean gravel filled into the gap between the tunnel and the pipe segment needs to meet a suitable particle size range. If the particle size of the bean gravel is large, it will not only affect the quality of the subsequent filling construction, but also easily lead to blockage of the discharge port of the conical hopper 2. Therefore, we arrange a number of rollers 8 arranged in an array inside the conveying pipe 5. In this embodiment, there are four rollers 8, and a filter plate 9 is arranged below the rollers 8. A crushing chamber is formed between the rollers 8 and the filter plate 9. The bean gravel that meets the requirements of the filling construction process passes through the filter holes on the filter plate 9 and finally falls into the bean gravel tank 6, while the bean gravel that does not meet the requirements of the filling construction process will gather in the crushing chamber, be repeatedly crushed by the rollers 8 to reduce the particle size, and finally pass through the filter holes on the filter plate 9.

[0030] Since the number of filter holes on the filter plate 9 is limited and the filter holes may be blocked, the efficiency of bean gravel particle size screening is reduced. Therefore, we set the filter plate 9 as a movable structure, so that a height-variable crushing chamber is formed between the roller cutter 8 and the filter plate 9. When the discharge port of the conical hopper 2 is at a normal opening, the height value of the crushing chamber is slightly larger than the particle size value of the bean gravel that meets the requirements of the blowing and filling construction process, which can guide some of the bean gravel that meets the requirements of the blowing and filling construction process to pass through the crushing chamber, sharing part of the screening task; when the discharge port of the conical hopper 2 is at a larger opening, that is, the discharge port of the conical hopper 2 is blocked, the filter plate 9 moves toward the direction close to the roller cutter 8, so that the height value of the crushing chamber is smaller than the particle size value of the bean gravel that meets the requirements of the blowing and filling construction process, so that the bean gravel in the crushing chamber is fully in contact with the roller cutter 8, which is convenient for fully crushing the subsequent bean gravel, ensuring that the particle size of the bean gravel finally entering the bean gravel tank 6 is within a suitable range.

[0031] Specifically, the four corners of the lower end of the filter plate 9 are rotatably connected to support rods 91, and the other ends of the support rods 91 are rotatably connected to the inner wall of the feed pipe 5. The four support rods 91 form a parallelogram structure. When the discharge port of the conical hopper 2 is blocked, the four support rods 91 rotate synchronously toward the direction close to the roller cutter 8, so that the distance between the filter plate 9 and the roller cutter 8 is reduced, thereby achieving the purpose of lowering the height of the crushing chamber.

[0032] On the basis of the above scheme, in order to prevent the pea gravel that has not been crushed and screened from passing through the gap between the filter plate 9 and the inner lower wall of the roller cutter 8, a flexible plate 10 is installed at one end of the filter plate 9 close to the conical hopper 2 in this embodiment. The flexible plate 10 is made of flexible material, and the other end of the flexible plate 10 is fixedly connected to the inner lower wall of the feed pipe 5. The pea gravel that has not been crushed and screened is guided to the filter plate 9 through the flexible plate 10. At the same time, since the flexible plate 10 has a certain degree of elasticity and toughness, it also meets the requirement of the filter plate 9 to move within a certain range.

[0033] Under the guidance of the flexible plate 10, the pea gravel will directly enter the crushing chamber, which will cause the upper area of ​​the roller cutter 8 to be idle, reducing the crushing efficiency of the pea gravel. Therefore, we set an upward protrusion 11 on the flexible plate 10. The protrusion 11 is made of hard material. The protrusion 11 gives the pea gravel an upward movement direction, so that the pea gravel contacts the upper area of ​​the roller cutter 8, increasing the utilization rate of the roller cutter 8 and improving the crushing efficiency of the pea gravel. In order to increase the probability of the pea gravel contacting the upper area of ​​the roller cutter 8, an upper lining plate 51 is installed on the upper wall of the conveying pipe 5. The end surface of the upper lining plate 51 close to the roller cutter 8 is provided with an arc-shaped concave area 52 that matches the shape of the roller cutter 8.

[0034] On the basis of the above scheme, in order to further adjust the contact area between the bean gravel and the roller cutter 8, an electric cylinder 12 is installed at the lower end of the feed pipe 5. The piston rod of the electric cylinder 12 passes through the lower wall of the feed pipe 5 and is fixedly connected to the protrusion 11. The height of the protrusion 11 can be flexibly adjusted by retracting the piston rod of the electric cylinder 12. For example, periodic retraction and expansion are performed within a certain period of time, so that the bean gravel is in contact with all parts of the roller cutter 8, thereby improving the utilization rate of the roller cutter 8.

[0035] In addition, in the utility model, the gear structure is used to realize the two valve plates 3 moving away from each other. Specifically, the two valve plates 3 are respectively fixedly connected with a driving gear 31 and a driven gear 32 through a short shaft, and one end of the short shaft is movably connected to the outer wall of the conical hopper 2, and the driving gear 31 and the driven gear 32 are meshed and connected. The outer wall of the conical hopper 2 is also fixedly installed with a mounting seat 34, and an electric telescopic rod 33 is rotatably installed on the mounting seat 34. The piston rod of the electric telescopic rod 33 is rotatably connected to one of the valve plates 3, and the contraction of the piston rod of the electric telescopic rod 33 drives the valve plate 3 connected thereto to rotate in a direction away from the conical hopper 2, and the other valve plate 3 is synchronously rotated away from each other under the mutually meshing gear structure, thereby realizing the enlargement operation of the discharge port of the conical hopper 2.

[0036] In order to save manufacturing costs, this embodiment utilizes the rotation of the driving gear 31 to synchronously drive the rotation of the support rod 91. Specifically, a connecting shaft passes through the two adjacent support rods 91, and a third sprocket 92 is fixedly sleeved on the connecting shaft, and a synchronous chain belt 93 is sleeved between the two third sprockets 92; a second sprocket 312 is also fixedly sleeved on one of the connecting shafts, and a first sprocket 311 is also fixedly sleeved on the short shaft on which the driving gear 31 is fixedly sleeved, and a transmission chain belt 313 is sleeved between the first sprocket 311 and the second sprocket 312. When the driving gear 31 rotates, the driving gear 31 drives the first sprocket 311 to rotate through the short shaft connected thereto, the first sprocket 311 drives the second sprocket 312 to rotate through the transmission chain belt 313, and the second sprocket 312 drives the connecting shaft connected thereto to rotate, finally realizing the synchronous rotation of the four support rods 91; when the opening of the conical hopper 2 is in a normal state, the height of the crushing chamber formed between the filter plate 9 and the roller 8 is slightly larger than the bean gravel particle size that meets the construction requirements; when the opening of the conical hopper 2 is in a maximum state, the height of the crushing chamber formed between the filter plate 9 and the roller 8 is smaller than the bean gravel particle size that meets the construction requirements.

[0037] In the description of the present invention, the terms "first", "second", "another", and "yet another" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0039] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pea gravel feeding device for TBM construction, comprising a silo (1), a conical hopper (2) is installed at the lower end discharge port of the silo (1), a valve for controlling the opening size of the feeding channel is arranged at the lower end discharge port of the conical hopper (2), a conveyor belt (4) is arranged below the valve, a feeding pipe (5) is arranged at the end of the conveyor belt (4), and the end of the feeding pipe (5) extends to the top of the pea gravel tank (6), characterized in that: A material detector (7) for monitoring the falling of pea gravel at the discharge port of the conical hopper (2) is arranged between the valve and the conveyor belt (4); a plurality of rollers (8) arranged in an array are arranged inside the conveying pipe (5), a filter plate (9) is arranged below the rollers (8), and a crushing chamber with variable height is formed between the rollers (8) and the filter plate (9).

2. A pea gravel feeding device for TBM construction filling according to claim 1, characterized in that: A vibrator is installed on the outer side wall of the silo (1).

3. The pea gravel feeding device for TBM construction according to claim 1, characterized in that: The four corners of the lower end of the filter plate (9) are rotatably connected to support rods (91), and the other end of the support rod (91) is rotatably connected to the inner wall of the feed pipe (5), so that the four support rods (91) form a parallelogram structure.

4. A pea gravel feeding device for TBM construction filling according to claim 3, characterized in that: A flexible plate (10) is installed at one end of the filter plate (9) close to the conical hopper (2), and the flexible plate (10) is made of flexible material.

5. The pea gravel feeding device for TBM construction according to claim 4, characterized in that: The flexible plate (10) is provided with a protruding portion (11) protruding upwards, and the protruding portion (11) is made of a hard material.

6. The pea gravel feeding device for TBM construction according to claim 5, characterized in that: An electric cylinder (12) is installed at the lower end of the material delivery pipe (5), and a piston rod of the electric cylinder (12) penetrates the lower wall of the material delivery pipe (5) and is fixedly connected to the raised portion (11).

7. The pea gravel feeding device for TBM construction filling according to claim 3 is characterized by: The valve is composed of two valve plates (3); the two valve plates (3) are respectively fixedly connected with a driving gear (31) and a driven gear (32) through a short shaft, and one end of the short shaft is movably connected to the outer wall of the conical hopper (2), the driving gear (31) and the driven gear (32) are meshed and connected, and a mounting seat (34) is also fixedly installed on the outer wall of the conical hopper (2), and an electric telescopic rod (33) is rotatably installed on the mounting seat (34), and a piston rod of the electric telescopic rod (33) is rotatably connected to one of the valve plates (3).

8. The pea gravel feeding device for TBM construction according to claim 7, characterized in that: A connecting shaft passes through two front and rear adjacent supporting rods (91); a third sprocket (92) is fixedly sleeved on the connecting shaft; a synchronous chain belt (93) is sleeved between the two third sprockets (92); a second sprocket (312) is also fixedly sleeved on one of the connecting shafts; a first sprocket (311) is also fixedly sleeved on the short shaft fixedly sleeved with the driving gear (31); a transmission chain belt (313) is sleeved between the first sprocket (311) and the second sprocket (312).

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