Multifunctional roadway / tunnel excavation construction equipment

Abstract

The application discloses a kind of multifunctional lane / tunnel excavation construction equipment, comprising: lane / tunnel excavation equipment, transfer belt conveyor and telescopic belt conveyor, transfer belt conveyor tail end and scraper conveyor head unloading end are mutually overlapped, and with lane / tunnel excavation equipment movable connection with detachable connection mode, lane / tunnel excavation equipment and transfer belt conveyor are provided with drilling device, drilling device includes jib component and drilling mechanism, jib rear end with its front end can swing in two dimensions of up and down and left and right, respectively movable installation on lane / tunnel excavation equipment and transfer belt conveyor, its front end is movably connected with drilling mechanism.The present application eliminates the existing complete equipment, single equipment function is not complete, function distribution is not reasonable and cannot be connected and split between each other etc., greatly improves construction efficiency and construction speed, reduces labor intensity, especially suitable for small span lane / tunnel mechanized excavation construction.

Description

Technical Field

[0001] This invention relates to the field of tunneling equipment technology, and in particular to a multifunctional tunnel / roadway excavation equipment. Background Technology

[0002] In coal mine systems, roadways (hereinafter referred to as rock roadways) and railway, highway, and hydropower systems (hereinafter referred to as rock tunnels) are constructed by excavation in rock mass. Drilling and blasting rock has always been the most commonly used rock breaking method. Other rock breaking methods include full-face mechanical rolling and scraping rock breaking by TBMs (Tunnel Boring Machines, including open-face and shield types), and partial-face cutting rock breaking by high-power cantilever horizontal axis hard rock tunnel boring machines.

[0003] In terms of adaptability to factors such as changes in pitch angle and advance direction of roadways and tunnels (hereinafter referred to as roadways / tunnels) located in rock masses, size of roadway / tunnel cross-section and length, rock hardness, and changes in surrounding rock stability, drill-and-blast rock breaking is significantly superior to TBM. In addition, TBM is large in size and complex in structure, and its cost is relatively much higher. Its installation and removal cycle is long, and its rock breaking energy consumption per unit volume and the cost per meter of project are significantly higher. Therefore, even though TBM has been around for many years, it still cannot completely replace the traditional drill-and-blast rock breaking method.

[0004] The cantilevered horizontal axis high-power hard rock tunnel boring machine (TBM), which has been on the market for over 20 years, has not been widely adopted in tunnel / street excavation construction due to several issues. These issues include high noise levels from the cutting teeth when cutting hard rock, extremely high dust concentrations that seriously endanger the occupational health of construction workers, and high costs per meter of project (mainly due to high wear and tear of the cutting teeth, equipment maintenance and depreciation costs, and financial expenses). Moreover, if the rock hardness exceeds the Protodyakonov hardness coefficient of 7, the construction speed will be significantly reduced. In particular, when the Protodyakonov hardness coefficient exceeds 9, it is almost impossible to use a hard rock TBM for rock breaking. A few cities have resorted to using high-power cantilevered horizontal axis hard rock TBMs for subway tunnel construction due to limitations that prevent the use of conventional drilling and blasting rock methods or the availability of TBMs, but the results have been far from ideal.

[0005] It is entirely foreseeable that drilling and blasting rock will remain an irreplaceable rock-breaking method for tunnel / roadway excavation for the present and for a considerable period of time to come. However, the span of most coal mine rock roadways is less than 6.0m. Because the roadway span is less than the width required for two pieces of equipment to pass each other, it does not have the engineering conditions for using two or even three or more different types of construction equipment to alternately operate at the working face, as is the case with general railway tunnel excavation. Therefore, many coal mines currently face at least two prominent problems in rock roadway excavation: First, the level of mechanization is low. Some operations still have to be completed manually by operating outrigger-type rock drilling rigs and single-unit pneumatic rock bolt drilling rigs, resulting in high labor intensity and low efficiency. Second, the construction speed is low. Even after long-term development, the monthly advance per head is mostly below 80m, rarely exceeding 80m, and even less often reaching 100m or more. However, with continuous high-intensity mining, shallow coal resources are rapidly decreasing, and in recent years, more and more deep resources have been mined. As a result, deep coal resources have high gas content, and it is necessary to carry out pre-mining gas drainage in rock tunnels excavated in the adjacent rock strata to significantly reduce the gas content of the coal seam and create the necessary conditions for subsequent safe mining. However, the current monthly advance rate of rock tunnel excavation is difficult to meet the needs of normal mine production.

[0006] In conclusion, it is essential to develop multifunctional tunnel / tunnel excavation equipment with two or more functions based on the drill-and-blast method. Furthermore, it is crucial to develop complementary construction equipment that is positioned behind the excavation equipment and functionally compatible with the equipment at the front. This will create a highly efficient set of construction equipment, significantly improving the mechanization, construction speed, and operational efficiency of small-span tunnel / tunnel excavation while reducing the labor intensity of construction workers. Summary of the Invention

[0007] In view of this, the present invention provides a multi-functional tunnel / tunnel excavation construction equipment based on the drill-and-blast method. This equipment is a new type of complete set of construction equipment composed of multiple construction devices, in order to solve the problems of existing complete sets of construction equipment being incomplete in function, having unreasonable matching relationships between different devices, being unsuitable for engineering conditions of small-span tunnel / tunnel construction, and having prominent problems such as low degree of construction mechanization, heavy labor of operators, low work efficiency and construction speed.

[0008] To solve the above-mentioned technical problems, the technical solution of the present invention is: a multifunctional tunnel / tunnel excavation construction equipment, comprising: a tunnel / tunnel excavation device, a transfer belt conveyor, and a retractable belt conveyor; the tunnel / tunnel excavation device includes a chassis, the chassis including a frame and tracked walking parts installed on both sides of the frame, and a scraper conveyor and a rock cutting loading mechanism are installed on the chassis; the transfer belt conveyor is used to transfer and unload the rock cuttings unloaded by the scraper conveyor onto the retractable belt conveyor; the retractable belt conveyor includes a tail section equipped with a reversing roller. The assembly includes a tail section connected to the tail assembly, with tracks on both sides of the tail section, hereinafter referred to as tail tracks. The unloading end of the transfer belt conveyor is mounted above the head travel section equipped with rigid wheels, allowing it to move in both vertical and horizontal dimensions. The rigid wheels of the head travel section straddle the tail tracks. The tail end of the transfer belt conveyor is positioned below the unloading end of the scraper conveyor, overlapping with it, and is detachably connected to the tunnel / tunnel excavation system. The equipment is connected in a movable manner. Based on this movable connection, the tail end of the transfer belt conveyor can rotate relative to the tunnel / tunnel excavation equipment in both vertical and horizontal dimensions. The tail end of the transfer belt conveyor is equipped with a tail traveling section with rigid wheels. If the movable connection is disengaged, the rigid wheels of the tail traveling section straddle the tail track or straddle a track laid on the tunnel / tunnel floor. Both the tunnel / tunnel excavation equipment and the transfer belt conveyor are equipped with drilling devices. The drilling devices include a boom assembly and a drilling mechanism. The boom assembly includes a boom... The boom is a telescopic boom with a built-in telescopic cylinder. The rear end of the boom is movably installed on the left and right sides of the tunnel / tunnel excavation equipment and the transfer belt conveyor, respectively, with its front end able to swing in both vertical and horizontal dimensions. Its front end is movably connected to the drilling mechanism. The drilling device installed on the tunnel / tunnel excavation equipment is used to create blasting rock boreholes in the working face rock mass in front of the chassis and / or to implement anchor bolt support for the surrounding rock of the tunnel / tunnel. The drilling device installed on the transfer belt conveyor is used to implement anchor bolt support for the surrounding rock of the tunnel / tunnel.

[0009] The head travel section and / or the tail travel section are provided with a hydraulic drive motor or electric motor that is rigidly connected to their wheels. The hydraulic drive motor provided in the head travel section is referred to as the head motor, and the hydraulic drive motor provided in the tail travel section is referred to as the tail motor.

[0010] The tail section is equipped with a brake that is connected to its wheels. A hydraulic control circuit is provided between the brake and the hydraulic oil input and return ports of the tail motor. When the oil pressure from the hydraulic oil input port of the tail motor is transmitted to the brake and the pressure reaches a predetermined value, the brake automatically releases its braking function. Conversely, when the oil pressure from the hydraulic oil input port of the tail motor disappears or falls below the predetermined value, the brake automatically restores its braking function.

[0011] The drilling mechanism includes a power head, a slide block, a drilling frame, and a propulsion mechanism. The power head is fixedly connected to or integrally formed with the slide block. The slide block is slidably mounted on the drilling frame. The propulsion mechanism is disposed between the slide block and the drilling frame, driving the slide block to slide relative to the drilling frame. This is denoted as Scheme A; or

[0012] The drilling mechanism includes a power head, a slide block, a drilling frame, a propulsion mechanism, and a drilling carriage. The power head is fixedly connected to or integrally formed with the slide block. The slide block is slidably mounted on the drilling frame. The propulsion mechanism is disposed between the slide block and the drilling frame, driving the slide block to slide relative to the drilling frame. The drilling frame is slidably mounted on the drilling carriage. A drilling frame drive cylinder is disposed between the drilling frame and the drilling carriage, referred to as Scheme B.

[0013] The power head of the drilling device installed on the tunnel / tunnel excavation equipment is a rock drilling rig, and the power head of the drilling device installed on the transfer belt conveyor is either a rock drilling rig or a hydraulic motor.

[0014] The rear end of the boom is hinged to the transition connection seat via a cross-hinged joint. The transition connection seat is connected to or integrally set with the transfer belt conveyor and the tunnel / tunnel excavation equipment, respectively. Two boom swing cylinders are set between the rear part of the boom and the transition connection seat. The rear end of the boom swing cylinder is hinged to the transition connection seat via a cross-hinged joint, and its front end is hinged to the support boom.

[0015] The front end of the boom is connected to the rock drilling mechanism via connector I, connector II, rotary cylinder I, and rotary cylinder II;

[0016] The front end of the boom is connected to the mounting end of the rotary cylinder I, the output end of the rotary cylinder I and the mounting end of the rotary cylinder II are respectively connected to the connecting piece I, and the output end of the rotary cylinder II is connected to the connecting piece II;

[0017] When the drilling mechanism adopts scheme A, the drilling frame is rotatably mounted on the connecting member II, and a drilling frame swing cylinder is provided between the drilling frame and the connecting member II; when the drilling mechanism adopts scheme B, the drilling slide is rotatably mounted on the connecting member II, and a drilling slide swing cylinder is provided between the drilling slide and the connecting member II.

[0018] The rear end of the boom is hinged to the transition connection seat via a cross-hinged joint. The transition connection seat is fixedly connected to or integrally set with the transfer belt conveyor and the tunnel / tunnel excavation equipment, respectively. Two boom swing cylinders are provided between the rear part of the boom and the transition connection seat. The rear end of the boom swing cylinder is hinged to the transition connection seat via a cross-hinged joint, and its front end is hinged to the boom.

[0019] The front end of the boom is connected to the drilling mechanism via connector III, connector IV, and rotary cylinder III;

[0020] The front end of the boom is hinged to one side of the connector III via a cross joint. Two swing cylinders of the connector III are provided between its front part and one side of the connector III. The rear end of the swing cylinder of the connector III is hinged to the boom, and its front end is hinged to one side of the connector III via a cross joint. The mounting end of the rotary cylinder III is connected to the other side of the connector III, and the output end of the rotary cylinder III is connected to the connector IV.

[0021] When the drilling mechanism adopts scheme A, the drilling frame is rotatably mounted on the connecting member IV, and a drilling frame swing cylinder is provided between the drilling frame and the connecting member IV; when the drilling mechanism adopts scheme B, the drilling slide is rotatably mounted on the connecting member IV, and a drilling slide swing cylinder is provided between the drilling slide and the connecting member IV.

[0022] The chassis is provided with a boom sliding mechanism that can slide back and forth on both the left and right sides. The boom sliding mechanism includes a boom slide rail and a boom slide seat. The boom slide rail is arranged longitudinally on the chassis. The boom slide seat is slidably installed on the boom slide rail. A sliding power device is provided between the chassis and the boom slide seat. The transition connecting seat is connected to or integrally formed with the boom slide seat.

[0023] The boom slide is further provided with a lifting seat that is slidably connected thereto. A lifting power device is provided between the lifting seat and the boom slide. The transition connecting seat is fixedly connected to or integrally formed with the lifting slide.

[0024] The chassis is further provided with a connecting mechanism at the rear. The connecting mechanism includes a support arm and a rotating assembly. One end of the support arm is connected to the chassis. The rotating assembly is rotatably mounted above the other end of the support arm. The rotating assembly includes two lugs. The upper end of each lug is provided with a pin hole with an opening. Both sides of the tail end of the conveyor belt are provided with hook pins, which are hooked to the pin holes.

[0025] The chassis is equipped with a lifting mechanism at the rear. This lifting mechanism is used to lift the tail end of the conveyor belt during the connection and disconnection operations between the tail end of the conveyor belt and the tunnel / excavation equipment. The lifting mechanism includes a lifting arm and a worm gear slewing bearing driven by a hydraulic motor. The mounting end of the worm gear slewing bearing is connected to the chassis. The lifting arm is a telescopic sleeve type lifting arm with a built-in telescopic cylinder. One end of its outer sleeve is hinged to the output end of the worm gear slewing bearing. A lifting arm lifting cylinder is provided between the output end of the worm gear slewing bearing and the outer sleeve of the telescopic sleeve type lifting arm.

[0026] By adopting the above technical solution, the present invention has achieved the following beneficial technical effects:

[0027] First, considering the narrow and unchangeable working environment of small-span tunnels / tunnels, which makes it impossible to use multiple construction equipment in rotation at the working face, this invention creatively treats both the tunnel / tunnel excavation equipment and the transfer belt conveyor (commonly known as the secondary conveyor, as opposed to the scraper conveyor configured on the tunnel / tunnel excavation equipment) connected to it and attached to the unloading end of its scraper conveyor as functional equipment units of a complete set of construction equipment. Based on this, according to the basic production procedures, work content, and sequence of tunnel / tunnel excavation, the functional positioning and allocation, mechanical structure, and interconnection of the tunnel / tunnel excavation equipment and its supporting secondary conveyor are optimized. The design is comprehensively planned as follows: drilling devices are installed on both the tunnel / excavation equipment and the secondary transport equipment. The drilling devices on the tunnel / excavation equipment are used to create blasting boreholes in the working face rock mass in front of the chassis and / or to implement anchor bolt support for the surrounding rock of the tunnel / excavation. The drilling devices on the secondary transport equipment are used to implement supplementary anchor bolt / anchor cable support for the surrounding rock of the tunnel / excavation. The front and rear equipment adopt a connection method that can be easily connected and disassembled. On this basis, it creates a system that minimizes the space occupied by the equipment on site. The secondary transport equipment is not hindered in terms of time except for the time spent transporting rock debris from the tunnel / excavation equipment in front (which only accounts for about 10% of the total working time), and can move independently on the track as an anchor bolt / anchor cable support equipment.

[0028] Second, the substantial technological upgrades and performance improvements for the second transport vehicle are as follows:

[0029] ① The tail end of the secondary conveyor is connected to the tunnel / tunnel excavation equipment in a quick-disassembly connection method. The secondary conveyor can be quickly connected to the tunnel / tunnel excavation equipment to transfer the rock debris unloaded by the tunnel / tunnel excavation equipment to the tail load section of the telescopic belt conveyor. After the rock debris is transferred, the connection between the secondary conveyor and the tunnel / tunnel excavation equipment can be quickly disconnected. This allows the secondary conveyor to perform additional rock bolt / anchor cable support work on the tunnel / tunnel surrounding rock in parallel operation without being affected by the drilling of blasting rock holes or the implementation of rock bolt support on the tunnel / tunnel surrounding rock by the tunnel / tunnel excavation equipment in front.

[0030] ② A tail section was added to the tail end of the secondary conveyor. After disconnecting from the tunnel / roadway excavation equipment in front, the rigid wheels of the tail section straddle the tail rails on both sides of the load-bearing section of the telescopic belt conveyor, or straddle the rails laid on the roadway floor. Furthermore, a travel drive motor was installed in the head section and / or tail section of the secondary conveyor, giving it the power to move autonomously. This significantly improves the flexibility and efficiency of its bolt / cable support operations and expands its operational coverage. A brake was also installed in the tail section, hydraulically interlocked with the tail motor, giving the secondary conveyor an automatic braking function. When disconnected from the tunnel / roadway excavation equipment in front, the brake effectively prevents it from slipping uncontrollably on the slope due to downward force.

[0031] Third, a special lifting mechanism has been added to the tunnel / tunnel excavation equipment. This lifting mechanism can be used to lift the tail end of the transfer belt conveyor, which can greatly improve the speed of connecting and disconnecting the unloading end of the secondary conveyor and the tunnel / tunnel excavation equipment.

[0032] Fourth, drilling devices are installed on both sides of the chassis of the tunnel / tunnel excavation equipment. This enables it to not only perform rock cuttings loading and transportation functions, but also to create boreholes for blasting rock and even provide anchor bolt support for the surrounding rock of the tunnel / tunnel. Thus, it becomes a multi-functional tunnel / tunnel excavation equipment. Furthermore, a boom sliding mechanism and lifting seat that can slide forward and backward are installed on its chassis, which can further increase the range of forward and backward movement of the boom and the drilling mechanism. It also gives the rear end of the boom a lifting function. This solves the problem of blind spots in the drilling operation caused by installing the drilling devices on both sides of the equipment chassis and setting the rock cuttings loading mechanism at the front of the equipment chassis, as well as the problem of the drilling devices touching the working face rock wall when the rock cuttings loading mechanism is loading the foremost rock cuttings. It also makes it easier for the drilling devices to create boreholes for blasting rock and perform anchor bolt support operations over a larger area without moving the entire equipment.

[0033] In summary, on the one hand, compared with the existing technology that uses two or more single-function construction devices to work at the working face in rotation, the multi-functional tunnel / tunnel excavation equipment of this invention not only significantly improves the construction speed by saving the time of alternating between different functional devices, but also allows for the efficient loading and transportation of rock debris, the creation of blasting boreholes in the working face rock mass, and the anchoring of the surrounding rock of the tunnel / tunnel, which are originally not feasible due to limited space. Operations such as rock bolt support can be mechanized. Furthermore, while retaining the essential rock debris transfer function of the secondary conveyor system, this invention incorporates a series of profound and substantial technical modifications and performance and functional enhancements. These include a quick-connect and detachable connection method between the secondary conveyor and the preceding tunnel / tunnel excavation equipment, and the installation of a walking unit with driving force at its tail end, which serves as the carrier for a drilling device. This allows the secondary conveyor system to perform supplementary rock bolt / cable support for the tunnel / tunnel surrounding rock in parallel operations from the rear, without being hindered by the preceding tunnel / tunnel excavation equipment. These technical measures will significantly improve the mechanization level, construction speed, and operational efficiency of small-span tunnel / tunnel excavation based on the drill-and-blast method, while reducing labor intensity. Furthermore, this invention also features a systematic and substantial technical transformation and performance enhancement of the two existing supporting construction equipment for tunnel / roadway excavation—the secondary transporter and the muck loader—adding new functions to both and making the combination of the two equipment more reasonable, achieving synergistic technical effects. Both have significant characteristics such as small space occupation, flexible and efficient operation, and minimal mutual interference, making them particularly suitable complete sets of equipment for small-span tunnel / roadway excavation construction. Therefore, it will significantly promote the technological progress of small-span tunnel / roadway excavation construction. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a multifunctional tunnel / tunnel excavation construction equipment embodiment of the present invention, showing the tunnel / tunnel excavation equipment and the transfer belt conveyor in a disengaged state;

[0035] Figure 2 yes Figure 1 The diagram shows the structural schematic of the tunnel / excavation equipment in the embodiment shown.

[0036] Figure 3 yes Figure 1 The schematic diagram of the transfer belt conveyor and the retractable belt conveyor in the embodiment shown;

[0037] Figure 4 yes Figure 1 The schematic diagram shown in the embodiment depicts the tunnel / excavation equipment and the transfer belt conveyor in a connected state.

[0038] Figure 5 yes Figure 2 Schematic diagram of the loading and unloading mechanism for slag;

[0039] Figure 6 yes Figure 2 Schematic diagram of the mid-arm sliding mechanism;

[0040] Figure 7 yes Figure 3 A schematic diagram of the drilling device (equipped with a rotary hydraulic cylinder);

[0041] Figure 8 yes Figure 7 Structural diagram of the boom assembly;

[0042] Figure 9 yes Figure 7 Schematic diagram of the drilling mechanism;

[0043] Figure 10 yes Figure 2 A schematic diagram of the drilling device (equipped with two rotary hydraulic cylinders);

[0044] Figure 11 yes Figure 1 Reference hydraulic interlock schematic diagram between the tail motor and brake of the tail section of the No. 2 transport aircraft;

[0045] In the picture:

[0046] 1. Tunnel / roadway excavation equipment;

[0047] 11. Chassis;

[0048] 12. Load the shovel plate;

[0049] 13. Boom sliding mechanism; 131. Boom base; 132. Sliding power device; 133. Boom slide rail; 134. Boom slide block; 135. Lifting seat;

[0050] 14a. Drilling apparatus; 14b. Drilling apparatus;

[0051] 141. Boom assembly; 1411. Transition connector; 1412. Boom swing cylinder; 1413. Boom; 1414. Connector III swing cylinder; 1415. Connector III; 1416. Slewing cylinder III; 1417. Slewing cylinder I; 1418. Connector I; 1419. Slewing cylinder II; 1420. Connector II;

[0052] 142. Drilling mechanism; 1421. Slide; 1422. Power head; 1423. Drilling frame; 1424. Drilling slide; 1425. Propulsion mechanism; 1426. Drilling frame drive cylinder; 1427. Drilling slide swing cylinder; 1428. Connecting part IV;

[0053] a, b, c, and d are all cross-shaped hinge joints;

[0054] 15. Rock cuttings loading mechanism; 151. First loading arm; 152. Second loading arm; 153. Bucket; 154. Rotating body; 155. Rotary power unit of loading mechanism;

[0055] 16. Lifting mechanism; 161. Lifting boom; 162. Worm gear-worm slewing bearing; 163. Lifting boom lifting cylinder;

[0056] 17. Scraper conveyor;

[0057] 18. Hook-on mechanism; 181. Support arm; 182. Rotary assembly; 182a. Hook lug; 182b. Pin hole;

[0058] 2. Transfer belt conveyor;

[0059] 21. Head travel section; 22. Tail travel section; 23. Mounting pin; 24. Mounting base;

[0060] 3. Retractable belt conveyor. Detailed Implementation

[0061] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of the present invention, but it is not intended to limit the scope of protection of the appended claims.

[0062] like Figure 1 As shown, a multi-functional tunnel / tunnel excavation construction equipment includes a tunnel / tunnel excavation device 1, a transfer belt conveyor 2 (commonly known as "secondary transport"), and a retractable belt transporter 3.

[0063] like Figure 1 and Figure 2 As shown, the tunnel / tunnel excavation equipment 1 includes a chassis 11, which includes a frame and tracked walking parts installed on the left and right sides of the frame. The chassis 11 is equipped with a loading shovel 12, a drilling device 14b, a rock cutting mechanism 15, a scraper conveyor 17, and a lifting mechanism 16. The drilling device 14a is located on both sides of the chassis 11. In this embodiment, the drilling device 14a is installed on the chassis 11 via a boom sliding mechanism 13. The boom sliding mechanism 13 is used to eliminate the problem of blind spots in the operation of the drilling device 14b due to the installation of the drilling device 14b on both sides of the equipment chassis 11 and the rock cutting mechanism 15 at the front of the chassis. It also eliminates the problem of the drilling device 14b touching the working face rock wall when the rock cutting mechanism 15 is loading the foremost rock cutting. Furthermore, it can increase the forward and backward movement range of the drilling device 14b, so that the drilling device 14b can conveniently create boreholes for blasting rock and carry out anchor bolt support operations within a larger range.

[0064] The rock cuttings loading mechanism 15 cooperates with the loading shovel 12 to load the rock cuttings onto the scraper conveyor 7. The scraper conveyor 7 is located in the center of the frame and is used to transfer the rock cuttings to the transfer belt conveyor 2 behind the chassis 11.

[0065] like Figure 1 and Figure 3 As shown, the transfer belt conveyor 2 is used to transfer the rock debris unloaded from the scraper conveyor 17 to the telescopic belt conveyor 3. The drilling device 14b installed on the tunnel / tunnel excavation equipment 1 is used to create blasting rock boreholes in the working face rock mass in front of the chassis 11 and / or to implement anchor bolt support for the surrounding rock of the tunnel / tunnel. The drilling device 14a installed on the transfer belt conveyor 2 uses the transfer belt conveyor 2 as a carrier to implement additional anchor bolt / anchor cable support for the surrounding rock of the tunnel / tunnel.

[0066] like Figure 1 and Figure 3 As shown, the retractable belt conveyor 3 includes a tail assembly with a reversing roller and a tail load-bearing section connected to the tail assembly. Tracks, hereinafter referred to as tail tracks, are provided on both sides of the tail load-bearing section. The head unloading end of the transfer belt conveyor 2 is mounted above the head traveling section 21, which is equipped with rigid wheels, and is movable in both vertical and horizontal dimensions. The rigid wheels of the head traveling section straddle the tail tracks.

[0067] like Figure 4 As shown, the tail end of the transfer belt conveyor 2 is positioned below the unloading end of the scraper conveyor 17, overlapping with it, and is movably connected to the tunnel / tunnel excavation equipment 1. Based on this movable connection, the tail end of the transfer belt conveyor 2 can rotate relative to the tunnel / tunnel excavation equipment 1 in both vertical and horizontal dimensions. The tail end of the transfer belt conveyor 2 is equipped with a tail travel section 22 with rigid wheels. If the movable connection is disengaged, the rigid wheels of the tail travel section 22 straddle the tail track or a track (not shown) laid on the tunnel / tunnel floor. From an inventive perspective, both the head travel section 21 and / or the tail travel section 22 can be equipped with a hydraulic drive motor or electric motor that is drively connected to their rigid wheels. The hydraulic drive motor in the head travel section 21 is referred to as the head motor, and the hydraulic drive motor in the tail travel section 22 is referred to as the tail motor.

[0068] The tail section 22 is equipped with a brake that is connected to its wheel drive. Figure 11The diagram shows a left brake and a left tail motor located on the left side of the tail section, and a right brake and a right tail motor located on the right side of the tail section. A hydraulic control circuit is provided between the brake and the hydraulic oil input and return ports of the tail motors. When oil pressure from the tail motor's hydraulic oil input port is transmitted to the brake and reaches a predetermined value, the brake automatically releases its braking function. Conversely, when the oil pressure from the tail motor's hydraulic oil input port disappears or falls below the predetermined value, the brake automatically resumes its braking function. Figure 11 In the middle, Port A and Port B are two hydraulic connection ports between the two tail motors on the left and right sides of the tail travel section and the hydraulic valves that control the forward and backward movement of the tail travel section.

[0069] Combination Figure 2 and Figure 4 The chassis 11 is provided with a mounting mechanism 18 at the rear. The mounting mechanism 18 includes a support arm 181 and a rotating component 182. One end of the support arm 181 is connected to the chassis 11. The rotating component 182 is rotatably mounted above the other end of the support arm 181. The rotating component 182 includes two lugs 182a. The upper end of the lugs 182a is provided with a pin hole 182b. The pin hole 182b is provided with an opening. The two sides of the tail end of the conveyor belt 2 are provided with mounting pins 23, which are mounted on the pin holes 182b.

[0070] Combination Figure 2 and Figure 4 A lifting mechanism 16 is provided at the rear of the chassis 11. The lifting mechanism 16 is used to lift the tail end of the transfer belt conveyor 2 during the connection and disconnection operations between the tail end of the transfer belt conveyor 2 and the tunnel / tunnel excavation equipment 1. The lifting mechanism 16 includes a lifting arm 161 and a worm gear slewing bearing 162 driven by a hydraulic motor. The mounting end of the worm gear slewing bearing 162 is connected to the chassis 11. The lifting arm 161 is a telescopic sleeve type lifting arm with a built-in telescopic cylinder. One end of its outer sleeve is hinged to the output end of the worm gear slewing bearing 162. A lifting arm lifting cylinder 163 is provided between the output end of the worm gear slewing bearing 162 and the outer sleeve of the telescopic sleeve type lifting arm.

[0071] In this embodiment, the tail end of the transfer belt conveyor 2 is connected to the tunnel / tunnel excavation equipment 1 in front of it in a convenient and detachable manner. The transfer belt conveyor 2 can be quickly connected to the tunnel / tunnel excavation equipment 1 to transfer the rock debris unloaded by the tunnel / tunnel excavation equipment 1 to the tail load section of the telescopic belt conveyor 3 behind it. After the rock debris is transferred, the connection between the transfer belt conveyor 2 and the tunnel / tunnel excavation equipment 1 can be quickly disconnected. This allows the transfer belt conveyor 2 to efficiently provide additional rock bolt / anchor cable support to the tunnel / tunnel surrounding rock without being affected by the drilling of blasting rocks or the implementation of rock bolt support for the tunnel / tunnel surrounding rock caused by the tunnel / tunnel excavation equipment 1 in front of it.

[0072] The specific structure of some of the main components mentioned above is described in detail below.

[0073] Figure 5 The specific structure of the rock debris loading mechanism 15 is shown, combined with Figure 2 The rock slag loading mechanism 15 includes a rotating body 154, a first loading arm 151, a second loading arm 152, and a bucket 153 that are hinged in sequence. The rear end of the first loading arm 151 is hinged to the rotating body 154. The rotating body 154 is rotatably mounted on the chassis 11. A loading mechanism rotation power device 155 is provided between the rotating body 154 and the chassis 11.

[0074] Figure 6 The specific structure of the boom sliding mechanism 13 is shown, combined with Figure 2 A boom sliding mechanism 13, which can slide back and forth, is provided on the chassis 11. The boom sliding mechanism 13 includes a boom slide rail 133 and a boom slide seat 134. The boom slide rail 133 is longitudinally arranged on the boom base 131, and the boom base 131 is fixed to the chassis 11. The boom slide seat 134 is slidably or rollingly mounted on the boom slide rail 133. A sliding power device 132 is provided between the boom base 131 and the boom slide seat 134. The sliding power device 132 is preferably a telescopic cylinder, but it can also be other linear power devices. The rear end of the boom 1413 is movably mounted on the lifting seat 135 with its front end swinging in both vertical and horizontal dimensions. The lifting seat 135 is slidably mounted on the boom slide seat 134. A lifting power device (not shown in the figure) is provided between the lifting seat 135 and the boom slide seat 134. The lifting power device is preferably a telescopic cylinder, but it can also be other linear power devices. From the inventive concept, the boom base 131 can be regarded as part of the chassis 11.

[0075] In this example, the sliding power device 132, which is disposed between the chassis 11 and the boom slide 134, generally refers to the power device that drives the boom slide to move relative to the slide rail. It includes both the boom slide being slidably mounted on the slide rail and moving relative to the slide rail, and the boom slide rolling on the slide rail and moving relative to the slide rail.

[0076] Of course, if the lifting seat 135 is not set, the rear end of the boom 1413 is mounted on the boom slide 134 in a way that its front end can swing in both vertical and horizontal dimensions (that is, the transition connecting seat 1411 is fixedly connected to the boom slide 134). The advantage is that the structure is simplified, but the flexibility of the drilling device 14b is reduced and the adaptability to the working environment will be worse.

[0077] First, the drilling device 14a installed on the transfer belt conveyor 2 is described.

[0078] like Figure 3 and Figure 7 As shown, the drilling device 14a includes a boom assembly 141 and a drilling mechanism 142 connected together. The boom assembly 141 includes a boom 1413 and hydraulic cylinders, connectors, etc., connected to the boom 1413. The boom 1413 is a telescopic boom with a built-in telescopic hydraulic cylinder. In this embodiment, the rear end of the boom 1413 is movably mounted on the transfer belt conveyor 2 with its front end swinging in both vertical and horizontal dimensions. The front end of the boom 1413 is movably connected to the drilling mechanism 142.

[0079] Figure 8 The specific structure of boom component 141 is shown, combined with Figure 3 , Figure 7 and Figure 9 The rear end of the boom 1413 is hinged to the transition connecting seat 1411 via a cross-hinged joint. The transition connecting seat 1411 is fixedly connected to or integrally set with the mounting seat 24 on the transfer belt conveyor 2. Two boom swing cylinders 1412 are provided between the rear of the boom 1413 and the transition connecting seat 1411. The rear end of the boom swing cylinder 1412 is hinged to the transition connecting seat 1411 via a cross-hinged joint, and its front end is hinged to the boom 1413. By extending and retracting the two boom swing cylinders 1412, the boom 1413 can be driven to swing its front end in both vertical and horizontal dimensions.

[0080] The front end of the boom 1413 is connected to the drilling carriage 1424 via connector III 1415, connector IV 1428, and rotary cylinder III 1416 (as shown in the figure, it is arranged longitudinally).

[0081] The front end of boom 1413 is hinged to one side of connector III 1415 via a cross joint c. Two swing cylinders 1414 of connector III are installed between one side of connector III 1415 and the front of boom 1413. The rear end of connector III swing cylinder 1414 is hinged to boom 1413, and its front end is hinged to one side of connector III 1415 via a cross joint d. By extending and retracting the two swing cylinders 1414, connector III 1415 can be driven to swing in both vertical and horizontal dimensions. The mounting end of rotary cylinder III 1416 is connected to the other side of connector III 1415, and its output end is connected to connector IV 1428. By rotating rotary cylinder III 1416, drilling mechanism 142 can be driven to swing around the rotation center of rotary cylinder III 1416. The drilling slide 1424 is rotatably mounted on the connector IV 1428 (the connector IV 1428 is optimized to be a pin with an inner hole, and the drilling slide 1424 is provided with a pin hole that rotatably engages with the pin with the inner hole). A drilling slide swing cylinder 1427 is provided between the connector IV 1428 and the drilling slide 1424. The pitch angle of the drilling mechanism 142 can be adjusted by extending and retracting the drilling slide swing cylinder 1427.

[0082] like Figure 9 As shown, the drilling mechanism 142 includes a power head 1422, a slide 1421, a drilling frame 1423, and a propulsion mechanism 1425. The power head 1422 is fixedly connected to or integrally formed with the slide 1421, and the slide 1421 is slidably mounted on the drilling frame 1423. The propulsion mechanism 1425 preferably adopts a hydraulic cylinder-wire rope speed-multiplying mechanism or a hydraulic cylinder-chain speed-multiplying mechanism. The propulsion mechanism 1425 is disposed between the slide 1421 and the drilling frame 1423 and is used to drive the slide 1421 to slide relative to the drilling frame 1423. With the speed-multiplying mechanism, the drilling depth can reach twice the hydraulic cylinder stroke, achieving a larger drilling depth with a smaller hydraulic cylinder stroke (length). The drilling mechanism 142 includes a drilling slide 1424, which is movably connected to the front end of the boom 1413. A drilling frame 1423 is slidably mounted on the drilling slide 1424. A drilling frame drive cylinder 1426 is provided between the drilling frame 1423 and the drilling slide 1424. The drilling frame drive cylinder 1426 can drive the drilling frame 1423 to slide forward relative to the drilling slide 1424, causing its front end to abut against the working face rock wall or surrounding rock wall, thereby increasing the stability of the drilling mechanism 142 during drilling operations. Alternatively, the drilling mechanism 142 can be configured without the drilling slide 1424, allowing the drilling frame 1423 to be directly movably connected to the front end of the boom 1413. This simplifies the structure of the drilling mechanism 142, but the stability of the drilling mechanism 142 during rock drilling operations is inferior to the aforementioned structure.

[0083] For ease of description, the drilling mechanism 142 without the drilling slide 1424 is referred to as Scheme A, and the drilling mechanism 142 with the drilling slide 1424 is referred to as Scheme B. When the drilling mechanism 142 adopts Scheme A, the drilling frame 1423 is rotatably mounted on the connector IV 1428, and a drilling frame swing cylinder is provided between the drilling frame 1423 and the connector IV 1428; when the drilling mechanism 142 adopts Scheme B, the drilling slide 1424 is rotatably mounted on the connector IV 1428, and a drilling slide swing cylinder 1427 is provided between the drilling slide 1424 and the connector IV 1428.

[0084] The following describes the drilling device 14b installed on the roadway / tunnel excavation equipment 1.

[0085] like Figure 2 and Figure 10 As shown, the drilling device 14b is installed on the tunnel / tunnel excavation equipment 1, and its structure and principle are roughly the same as those of the drilling device 14a installed on the transfer belt conveyor 2. The main difference is that the connection between the front end of the boom and the drilling mechanism is different.

[0086] like Figure 10 As shown, in this embodiment, the front end of the boom 1413 is connected to the drilling carriage 1424 via connector I 1418, connector II 1420, rotary cylinder I 1417 (shown in the figure as longitudinally arranged), and rotary cylinder II 1419 (shown in the figure as vertically arranged).

[0087] Specifically, the front end of boom 1413 is connected to the mounting end of rotary cylinder I 1417, the output end of rotary cylinder I 1417 and the mounting end of rotary cylinder II 1419 are respectively connected to connector I 1418, and the output end of rotary cylinder II 1419 is connected to connector II 1420.

[0088] When the drilling mechanism 142 adopts the aforementioned scheme B, the drilling slide 1424 is rotatably mounted on the connector II 1420, and a drilling slide swing cylinder 1427 is provided between the drilling slide 1424 and the connector II 1420. By rotating the rotary cylinder I 1417, the rotary cylinder II 1419 and the drilling mechanism 142 connected to the rotary cylinder II 1419 are driven to swing around the rotation center of the rotary cylinder I 1417; by rotating the rotary cylinder II 1419, the drilling mechanism 142 is driven to swing around the rotation center of the rotary cylinder II 1419; by extending and retracting the drilling slide swing cylinder 1427, the pitch angle of the drilling mechanism 142 can be adjusted.

[0089] When the drilling mechanism 142 adopts scheme A, the drilling frame 1423 is rotatably mounted on the connector II 1420, and a drilling frame swing cylinder is provided between the drilling frame 1423 and the connector II 1420.

[0090] In this embodiment, the drilling device 14b installed on the tunnel / excavation equipment 1 is structurally similar to the drilling device 14a installed on the transfer belt conveyor 2. When the drilling device 14a (with a rotary cylinder installed between the boom front end and the drilling mechanism) is used, it can only be used to create drill-and-blast boreholes (the center line of the drilling mechanism 142 is parallel to the axis of the rotary cylinder III 1416), or only to implement anchor bolt support for the surrounding rock of the tunnel / excavation (the center line of the drilling mechanism 142 is perpendicular to the axis of the rotary cylinder III 1416), and cannot be used for both creating drill-and-blast boreholes and implementing anchor bolt support for the surrounding rock of the tunnel / excavation. When the drilling device 14b (with two rotary cylinders installed between the boom front end and the drilling mechanism) is used, it can be used for both creating drill-and-blast boreholes and implementing anchor bolt support for the surrounding rock of the tunnel / excavation.

[0091] Combination Figure 2 , Figure 6 and Figure 10 The rear end of the boom 1413 of the drilling device 14b is movably mounted on the lifting seat 135 of the boom sliding mechanism 13, with its front end swinging in both vertical and horizontal dimensions. The longitudinally movable front end of the boom 1413 is movably connected to the drilling mechanism 142. In this way, the boom 1413 can move with the longitudinal movement of the boom sliding mechanism's boom slide 134 and rise and fall with the rise and fall of the lifting seat 135. This not only solves the problem of blind spots in the drilling device caused by placing the drilling device on both sides of the equipment chassis and the rock cutting mechanism at the front of the chassis, but also the problem of the drilling device touching the working face rock wall when the rock cutting mechanism is loading the foremost rock cutting. Furthermore, it can increase the forward and backward movement range of the drilling device 14b, so that the drilling device can more conveniently create blasting rock boreholes and carry out anchor bolt support operations over a larger area.

[0092] Of course, without the boom sliding mechanism 13, the rear end of the boom 1413 can be directly and movably connected to the chassis 11.

[0093] The power head 1422 configured in the drilling device 14b of the tunnel / excavation equipment 1 is a rock drilling machine, and the power head 1422 configured in the drilling device 14a of the transfer belt conveyor 2 is either a rock drilling machine or a hydraulic motor.

[0094] In summary, this invention, based on the technical concept of systems engineering, creates a complete set of multifunctional tunnel / cartridge excavation equipment. It solves the prominent problems commonly found in current small-span tunnel / cartridge excavation construction, such as incomplete equipment functionality, unsuitability for the engineering conditions of small-span tunnel / cartridge construction, unreasonable functional allocation among supporting equipment, and inconvenient connection and disassembly between them. These problems result in low mechanization, heavy workload for workers, and low work efficiency and construction speed. This invention can significantly improve the mechanization level, construction speed, and work efficiency of small-span tunnel / cartridge excavation based on the drill-and-blast method, while reducing labor intensity, and will undoubtedly significantly promote the advancement of small-span tunnel / cartridge excavation technology.

[0095] The above description is an example of a preferred embodiment of the present invention. All parts not described in detail are known technologies in the art. The scope of protection of the present invention is determined by the content of the claims. Any equivalent transformations based on the technical teachings of the present invention are within the scope of protection of the present invention.

Claims

1. A multi-functional tunnel / roadway excavation construction equipment, comprising: Tunnel / road excavation equipment, transfer belt conveyors and retractable belt conveyors; The tunnel / excavation equipment includes a chassis, which comprises a frame and tracked traveling parts mounted on both sides of the frame. A scraper conveyor and a rock cutting loading mechanism are mounted on the chassis. The transfer belt conveyor is used to transfer and unload the rock cuttings unloaded by the scraper conveyor onto the retractable belt conveyor. The retractable belt conveyor includes a tail assembly with a reversing roller and a tail load-bearing section connected to the tail assembly. Tracks are provided on both sides of the tail load-bearing section, hereinafter referred to as tail tracks. The unloading end of the transfer belt conveyor is mounted above the head traveling part equipped with rigid wheels in a manner that allows it to move in both vertical and horizontal dimensions. The rigid wheels of the head traveling part straddle the tail tracks. The tail end of the transfer belt conveyor is positioned below the unloading end of the scraper conveyor head in a manner that overlaps with it, and is movably connected to the tunnel / tunnel excavation equipment in a detachable manner. Based on this movable connection, the tail end of the transfer belt conveyor can rotate relative to the tunnel / tunnel excavation equipment in both vertical and horizontal dimensions. The tail end of the transfer belt conveyor is provided with a tail traveling section equipped with rigid wheels. If the movable connection is disengaged, the rigid wheels of the tail traveling section straddle the tail track or straddle the track laid on the tunnel / tunnel floor. Both the tunnel / tunnel excavation equipment and the transfer belt conveyor are equipped with drilling devices. The drilling device includes a boom component and a drilling mechanism. The boom component includes a boom, which is a telescopic boom with a built-in telescopic cylinder. The rear end of the boom is movably installed on the left and right sides of the tunnel / tunnel excavation equipment and the transfer belt conveyor, respectively, with its front end swinging in both vertical and horizontal dimensions. Its front end is movably connected to the drilling mechanism. The drilling device installed on the tunnel / tunnel excavation equipment is used to create blasting rock boreholes in the working face rock mass in front of the chassis and / or to implement anchor bolt support for the surrounding rock of the tunnel / tunnel. The drilling device installed on the transfer belt conveyor is used to implement anchor bolt support for the surrounding rock of the tunnel / tunnel.

2. The multi-functional lane / tunnel excavating construction equipment according to claim 1, wherein, The head travel section and / or the tail travel section are provided with a hydraulic drive motor or electric motor that is rigidly connected to its wheels. The hydraulic drive motor provided in the head travel section is referred to as the head motor, and the hydraulic drive motor provided in the tail travel section is referred to as the tail motor.

3. The multi-functional lane / tunnel excavating construction equipment according to claim 2, wherein, The tail section is equipped with a brake that is connected to its wheels. A hydraulic control circuit is provided between the brake and the hydraulic oil input and return ports of the tail motor. When the oil pressure from the hydraulic oil input port of the tail motor is transmitted to the brake and the pressure reaches a predetermined value, the brake automatically releases its braking function. Conversely, when the oil pressure from the hydraulic oil input port of the tail motor disappears or falls below the predetermined value, the brake automatically restores its braking function.

4. The multi-functional lane / tunnel excavating construction equipment according to claim 1, wherein, The drilling mechanism includes a power head, a slide block, a drilling frame, and a propulsion mechanism. The power head is fixedly connected to or integrally formed with the slide block. The slide block is slidably mounted on the drilling frame. The propulsion mechanism is disposed between the slide block and the drilling frame, driving the slide block to slide relative to the drilling frame. This is denoted as Scheme A; or The drilling mechanism includes a power head, a slide block, a drilling frame, a propulsion mechanism, and a drilling carriage. The power head is fixedly connected to or integrally formed with the slide block. The slide block is slidably mounted on the drilling frame. The propulsion mechanism is disposed between the slide block and the drilling frame, driving the slide block to slide relative to the drilling frame. The drilling frame is slidably mounted on the drilling carriage. A drilling frame drive cylinder is disposed between the drilling frame and the drilling carriage, referred to as Scheme B. The power head of the drilling device installed on the tunnel / tunnel excavation equipment is a rock drilling rig, and the power head of the drilling device installed on the transfer belt conveyor is either a rock drilling rig or a hydraulic motor.

5. The multi-functional lane / tunnel excavating construction equipment according to claim 4, wherein, The rear end of the boom is hinged to the transition connection seat via a cross-hinged joint. The transition connection seat is connected to or integrally set with the transfer belt conveyor and the tunnel / tunnel excavation equipment, respectively. Two boom swing cylinders are set between the rear part of the boom and the transition connection seat. The rear end of the boom swing cylinder is hinged to the transition connection seat via a cross-hinged joint, and its front end is hinged to the support boom. The front end of the boom is connected to the rock drilling mechanism via connector I, connector II, rotary cylinder I, and rotary cylinder II; The front end of the boom is connected to the mounting end of the rotary cylinder I, the output end of the rotary cylinder I and the mounting end of the rotary cylinder II are respectively connected to the connecting piece I, and the output end of the rotary cylinder II is connected to the connecting piece II; When the drilling mechanism adopts scheme A, the drilling frame is rotatably mounted on the connecting member II, and a drilling frame swing cylinder is provided between the drilling frame and the connecting member II; when the drilling mechanism adopts scheme B, the drilling slide is rotatably mounted on the connecting member II, and a drilling slide swing cylinder is provided between the drilling slide and the connecting member II.

6. The multi-functional lane / tunnel excavating construction equipment according to claim 4, wherein, The rear end of the boom is hinged to the transition connection seat via a cross-hinged joint. The transition connection seat is fixedly connected to or integrally set with the transfer belt conveyor and the tunnel / tunnel excavation equipment, respectively. Two boom swing cylinders are provided between the rear part of the boom and the transition connection seat. The rear end of the boom swing cylinder is hinged to the transition connection seat via a cross-hinged joint, and its front end is hinged to the boom. The front end of the boom is connected to the drilling mechanism via connector III, connector IV, and rotary cylinder III; The front end of the boom is hinged to one side of the connector III via a cross joint. Two swing cylinders of the connector III are provided between its front part and one side of the connector III. The rear end of the swing cylinder of the connector III is hinged to the boom, and its front end is hinged to one side of the connector III via a cross joint. The mounting end of the rotary cylinder III is connected to the other side of the connector III, and the output end of the rotary cylinder III is connected to the connector IV. When the drilling mechanism adopts scheme A, the drilling frame is rotatably mounted on the connecting member IV, and a drilling frame swing cylinder is provided between the drilling frame and the connecting member IV; when the drilling mechanism adopts scheme B, the drilling slide is rotatably mounted on the connecting member IV, and a drilling slide swing cylinder is provided between the drilling slide and the connecting member IV.

7. Multifunctional roadway / tunnel excavation construction equipment according to claim 5 or 6, characterized in that, The chassis is provided with a boom sliding mechanism that can slide back and forth on the left and right sides. The boom sliding mechanism includes a boom slide rail and a boom slide seat. The boom slide rail is arranged longitudinally on the chassis. The boom slide seat is slidably installed or rolled on the boom slide rail. A sliding power device is provided between the chassis and the boom slide seat. The transition connecting seat is connected to or integrally formed with the boom slide seat.

8. Drift / tunnel driving construction equipment according to claim 7, characterised in that, The boom slide is also provided with a lifting seat that is slidably connected thereto. A lifting power device is provided between the lifting seat and the boom slide. The transition connecting seat is fixedly connected to or integrally formed with the lifting slide.

9. The mine / tunnel driving construction equipment according to claim 1, wherein, The chassis is also provided with a connecting mechanism at the rear. The connecting mechanism includes a support arm and a rotating assembly. One end of the support arm is connected to the chassis. The rotating assembly is rotatably mounted above the other end of the support arm. The rotating assembly includes two lugs. The upper end of the lugs is provided with a pin hole with an opening. The tail end of the conveyor belt is provided with two hook pins on both sides, and the hook pins are hooked to the pin holes.

10. The mine / tunnel driving construction equipment according to claim 1, wherein, A lifting mechanism is also provided at the rear of the chassis. The lifting mechanism is used to lift the tail end of the transfer belt conveyor during the connection and disconnection operations between the tail end of the transfer belt conveyor and the tunnel / excavation equipment. The lifting mechanism includes a lifting arm and a worm gear slewing bearing driven by a hydraulic motor. The mounting end of the worm gear slewing bearing is connected to the chassis. The lifting arm is a telescopic sleeve type lifting arm with a built-in telescopic cylinder. One end of its outer sleeve is hinged to the output end of the worm gear slewing bearing. A lifting arm lifting cylinder is provided between the output end of the worm gear slewing bearing and the outer sleeve of the telescopic sleeve type lifting arm.

Images