A variable diameter rotary drilling device for small-diameter trenchless equipment

Abstract

The present invention discloses a variable diameter rotary excavation device for small-caliber trenchless equipment, which belongs to the field of trenchless technology and solves the problem of excavating underground pipelines of different diameters. The device of the present invention includes a support mechanism, a variable diameter rotary excavation mechanism and a slag output mechanism; the variable diameter rotary excavation mechanism and the support shell are positioned on the same axis by the support mechanism, and the support mechanism can be adjusted according to the different diameters of the excavation surface; the purpose of diameter change is achieved by controlling the opening and closing angle of the cutter bar through the telescopic control of the horizontal driving rod, and at the same time, the cutter head performs a circular motion around the driving rod to rotary excavate the soil, and the slag is finally discharged by the slag output mechanism. The present invention has a simple structure and a small driving torque, and can be applied to the excavation of pipelines of different diameters, greatly reducing the equipment cost of the construction unit.

Description

Technical Field

[0001] The invention relates to the technical field of trenchless technology, and in particular to a variable diameter rotary drilling device for small-caliber trenchless equipment. Background Art

[0002] Small-diameter trenchless equipment is widely used in municipal pipeline projects such as water supply and drainage, gas, etc. Different types of trenchless equipment have their own advantages and disadvantages, but most trenchless equipment only excavates a certain diameter. In order to achieve the excavation of pipes of different diameters, multiple sets of equipment of different diameters must be used, which increases the construction cost and limits its scope of use; the most technically sophisticated trenchless equipment at home and abroad include shield machines and pipe jacking machines, etc. Different types of trenchless equipment are divided into small, medium and large according to the diameter size, but all have the above problems.

[0003] At present, there are two ways to realize the excavation of different pipelines. One is to expand the excavation on the basis of a small-diameter pipeline. This operation is extremely cumbersome, time-consuming and costly. The other is that the cutter head itself has the ability to change diameter, such as a modular variable diameter expansion TBM cutter head with application number 201910540619.4. Although the above cutter head can achieve diameter change, its structure is complex, the required driving torque is large, and the scope of use is relatively limited. Therefore, designing a variable diameter rotary drilling device for small-diameter trenchless equipment can greatly reduce the equipment cost and construction cost of the construction unit, and has good application prospects. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a variable diameter rotary drilling device for small-diameter trenchless equipment, which solves the problem of using the same trenchless device to realize the excavation and laying of underground pipelines of different diameters, thereby greatly reducing the equipment cost and construction cost of the construction unit.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a variable diameter rotary drilling device for small-diameter trenchless equipment, comprising: a supporting mechanism, a variable diameter rotary drilling mechanism and a slag output mechanism; wherein:

[0006] Furthermore, the support mechanism includes: a support positioning tube, a support adjustment ring, a support arm, a support connecting rod, and a support shell; it is characterized in that the support mechanism is composed of three groups of parallel support rod systems that are evenly distributed along the axial direction of the support positioning tube at an interval of 120°; the outer wall of the support positioning tube and the inner ring of the support adjustment ring are provided with threads, wherein the threads of the two inner rings of the support adjustment rings have opposite rotation directions, and the two are connected by threaded matching; the two ends of the support arm are respectively connected to a pair of support adjustment rings through a pair of support connecting rods; the support arm is adjusted according to the diameter of the support shell through the support positioning tube, so that the axial center line of the support positioning tube and the support shell are always on the same straight line; the support shell is replaced in accordance with the required excavation surface diameter.

[0007] Furthermore, the variable diameter rotary drilling mechanism includes: a cutter head, a cutter head connecting shaft, a horizontal drive rod, a cutter bar, a planetary frame, a drive box, a hydraulic cylinder, a cutter bar support frame, a drive rod, a universal coupling, a planetary gear, a gear box, and a hydraulic motor; the drive rod is installed inside the support positioning tube, and the bottom end is connected to the drive box through a bearing; the horizontal drive rod is installed inside the drive rod through a keyway on the outer wall, and the bottom end is connected to the drive box through a bearing; the drive box is fixed to the bottom end of the support positioning tube; the cutter head is connected to the universal coupling through the cutter head connecting shaft, and the universal The other end of the coupling is connected to the planetary gear; the planetary gear is connected to the planetary carrier fixed on the driving rod and meshes with the gear ring inside the gear box; the planetary carrier can evenly install three planetary gears; the gear box is fixed to the top of the supporting positioning tube and is provided with a gear ring inside; the cutter head connecting shaft is connected to the inside of the cutter rod through a bearing, the top of the cutter rod is connected to the horizontal driving rod through a cutter rod support frame, and the bottom end is connected to the driving rod; the cutter head, cutter head connecting shaft, cutter rod, cutter rod support frame, and universal coupling are evenly installed along the axial direction of the driving rod at intervals of 120°.

[0008] Furthermore, the soil output mechanism comprises: a soil scraping wheel, a soil transport pipe, an adjustment positioning buckle, a soil transport spiral shaft, a soil transport hydraulic motor, a chain, a vertical spiral steering shaft, a horizontal spiral steering shaft, a horizontal soil transport steering pipe, and a vertical soil transport steering pipe; it is characterized in that: the soil transport pipe is connected to the support positioning pipe by adjusting the positioning buckle; both ends of the soil transport spiral shaft are installed inside the soil transport pipe through bearings, the top end is connected to the soil scraping wheel through a gear, and the bottom end is connected to the sprocket; the soil transport hydraulic motor is fixed on the soil transport pipe and connected to the sprocket at the bottom end of the soil transport spiral shaft through a chain; the front end of the soil transport pipe is installed as a soil pile plate at a certain angle, and is provided with a leakage groove, and the rear end is provided with a through hole, which is connected to the vertical soil transport steering pipe, and the vertical soil transport steering pipe is connected to the horizontal soil transport steering pipe, and the vertical soil transport steering pipe and the horizontal soil transport steering pipe are respectively installed with a vertical spiral steering shaft and a horizontal spiral steering shaft; the tail end of the horizontal soil transport steering pipe is provided with a soil outlet, and the soil is finally discharged from it.

[0009] Furthermore, the support connecting rod can change the position of the support adjustment ring to meet the needs of support shells of different calibers.

[0010] Furthermore, the hydraulic cylinder controls the extension and retraction of the horizontal driving rod, and the knife bar support frame connected to the front end of the horizontal driving rod adjusts the opening and closing angle of the knife bar to achieve the purpose of diameter change.

[0011] Furthermore, the variable diameter rotary drilling mechanism can achieve adjustment of different excavation surfaces by replacing different sized cutter bars and cutter head connecting shafts.

[0012] Furthermore, the cutter head performs a circular motion around the driving rod through a hydraulic motor, and the cutter head rotates along with the rotation of the planetary carrier, thereby achieving the effect of rotary excavation of the soil.

[0013] Furthermore, the adjustment positioning buckle can adjust the soil delivery pipe to the bottom of the support shell according to the different diameters of the support shell.

[0014] The present invention adopts the design of a variable diameter rotary drilling mechanism to simulate manual excavation to carry out regional excavation work on the excavation surface, which greatly reduces the driving force. At the same time, it is suitable for excavation of pipelines of different diameters, which can greatly reduce the equipment cost and construction cost of the construction unit and has a good application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention, the drawings required for describing the embodiments are briefly introduced below. Obviously, the described embodiments are only a part of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 It is a schematic diagram of the support mechanism of the present invention.

[0018] Figure 3 It is a schematic diagram of the variable diameter rotary drilling mechanism of the present invention.

[0019] Figure 4 It is a schematic diagram of the muck output mechanism of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, for ordinary technicians in this field, all other embodiments obtained without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 As shown, a variable diameter rotary drilling device for trenchless equipment described in this embodiment includes: a support mechanism 1, a variable diameter rotary drilling mechanism 2 and a slag output mechanism 3; wherein:

[0022] like Figure 2As shown, the support mechanism 1 described in this embodiment includes: a support positioning tube 101, a support adjustment ring 102, a support arm 103, a support connecting rod 104, and a support shell 105; it is characterized in that the support mechanism 1 is composed of three groups of parallel support rod systems that are evenly distributed along the axial direction of the support positioning tube 101 at an interval of 120°; the outer wall of the support positioning tube 101 and the inner ring of the support adjustment ring 102 are provided with threads, wherein the inner ring threads of the two support adjustment rings 102 have opposite rotation directions, and the two are connected by threaded matching; the two ends of the support arm 103 are respectively connected to a pair of support adjustment rings 102 through a pair of support connecting rods 104; the support arm 103 is adjusted according to the diameter of the support shell 105 through the support positioning tube 101, so that the axial center lines of the support positioning tube 101 and the support shell 105 are always on the same straight line; the support shell 105 is replaced in accordance with the different diameters of the required excavation surface.

[0023] like Figure 3 As shown, the variable diameter rotary drilling mechanism 2 described in this embodiment includes: a cutter head 201, a cutter head connecting shaft 202, a horizontal drive rod 203, a cutter bar 204, a planetary frame 205, a drive box 206, a hydraulic cylinder 207, a cutter bar support frame 208, a drive rod 209, a universal coupling 210, a planetary gear 211, a gear box 212, and a hydraulic motor 213; it is characterized in that: the drive rod 209 is installed inside the support positioning tube 101, and the bottom end is connected to the drive box 206 through a bearing; the horizontal drive rod 203 is installed inside the drive rod 209 through a keyway on the outer wall, and the bottom end is connected to the drive box 206 through a bearing; the drive box 206 is fixed to the bottom end of the support positioning tube 101; the cutter head 201 is connected to the universal coupling 206 through the cutter head connecting shaft 202 10 is connected, and the other end of the universal coupling 210 is connected to the planetary gear 211; the planetary gear 211 is connected to the planetary carrier 205 fixed on the driving rod 209, and meshes with the internal gear ring of the gear box 212; the planetary carrier 205 can evenly install three planetary gears 211; the gear box 212 is fixed to the top of the supporting positioning tube 101, and is provided with a gear ring inside; the cutter head connecting shaft 202 is connected to the inside of the cutter rod 204 through a bearing, and the top of the cutter rod 204 is connected to the horizontal driving rod 203 through the cutter rod support frame 208, and the bottom end is connected to the driving rod 209; the cutter head 201, the cutter head connecting shaft 202, the cutter rod 204, the cutter rod support frame 208, and the universal coupling 210 are composed of a whole and are evenly installed along the axial direction of the driving rod 209 at an interval of 120°.

[0024] like Figure 4As shown, the soil output mechanism 3 described in this embodiment includes: a soil scraping wheel 301, a soil delivery pipe 302, an adjustment positioning buckle 303, a soil delivery spiral shaft 304, a soil delivery hydraulic motor 305, a chain 306, a vertical spiral steering shaft 307, a horizontal spiral steering shaft 308, a horizontal soil delivery steering pipe 309, and a vertical soil delivery steering pipe 310; it is characterized in that: the soil delivery pipe 302 is connected to the support positioning pipe 101 through the adjustment positioning buckle 303; the two ends of the soil delivery spiral shaft 304 are installed in the soil delivery pipe 302 through bearings, the top end is connected to the soil scraping wheel 301 through a gear, and the bottom end is connected to the sprocket. The soil transport hydraulic motor 305 is fixed on the soil transport pipe 302 and connected to the sprocket at the bottom end of the soil transport spiral shaft 304 through a chain 306; the front end of the soil transport pipe 302 is installed as a soil pile plate at a certain angle and is provided with a leakage groove, and the rear end is provided with a through hole, which is connected to the vertical soil transport steering pipe 310, and the vertical soil transport steering pipe 310 is connected to the horizontal soil transport steering pipe 309, and the vertical soil transport steering pipe 310 and the horizontal soil transport steering pipe 309 are respectively installed with a vertical spiral steering shaft 307 and a horizontal spiral steering shaft 308; the tail end of the horizontal soil transport steering pipe 309 is provided with a soil discharge port, and the slag is finally discharged from it.

[0025] The support link 104 described in this embodiment can change the position of the support adjustment ring 102 to meet the needs of support shells 105 with different calibers.

[0026] The hydraulic cylinder 207 described in this embodiment controls the telescopic adjustment of the horizontal driving rod 203 to adjust the opening and closing angle of the knife rod 204 to achieve the purpose of diameter change.

[0027] The variable diameter rotary drilling mechanism 2 described in this embodiment can achieve adjustment of different excavation surfaces by replacing the cutter rods 204 and the cutter head connecting shaft 202 of different sizes.

[0028] The cutter head 201 described in this embodiment makes a circular motion around the driving rod 209 through the hydraulic motor 213, and the cutter head 201 rotates with the rotation of the planet carrier 205, so as to achieve the effect of rotary excavation of the soil.

[0029] The adjustable positioning buckle 303 described in this embodiment can adjust the soil transport pipe 302 to the optimal position according to the different diameters of the support shell 105.

[0030] The present invention adopts the design of a variable diameter rotary drilling mechanism to simulate manual excavation to carry out regional excavation work on the excavation surface, which greatly reduces the driving force. At the same time, it is suitable for the excavation and laying of pipelines of different diameters, which can greatly reduce the equipment cost and construction cost of the construction unit and has a good application prospect.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A variable diameter rotary drilling device for small-caliber trenchless equipment, characterized in that: include: A support mechanism (1), a variable diameter rotary drilling mechanism (2) and a slag output mechanism (3); wherein: the support mechanism (1) comprises: a support positioning tube (101), a support adjustment ring (102), a support arm (103), a support connecting rod (104), and a support shell (105); the support mechanism (1) is composed of three groups of parallel support rod systems that are evenly distributed at intervals of 120 degrees along the axial direction of the support positioning tube (101); the outer wall of the support positioning tube (101) and the inner ring of the support adjustment ring (102) are provided with threads, and two of the support adjustment rings are provided with threads. The inner thread of the integral ring (102) has opposite rotation directions, and the two are connected by threaded matching; the two ends of the support arm (103) are respectively connected to a pair of support adjustment rings (102) through a pair of support connecting rods (104); the support arm (103) is adjusted according to the diameter of the support shell (105) through the support positioning tube (101), so that the axis of the support positioning tube (101) and the support shell (105) are always on the same straight line; the support shell (105) is replaced in accordance with the different diameters of the required excavation surface; The variable diameter rotary drilling mechanism (2) comprises: a cutter head (201), a cutter head connecting shaft (202), a horizontal driving rod (203), a cutter bar (204), a planetary frame (205), a driving box (206), a hydraulic cylinder (207), a cutter bar support frame (208), a driving rod (209), a universal coupling (210), a planetary gear (211), a gear box (212), and a hydraulic motor (213); the driving rod (209) is installed inside the supporting positioning tube (101), and the bottom end is connected to the driving box (206) through a bearing; the horizontal driving rod (203) is installed inside the driving rod (209) through a keyway on the outer wall, and the bottom end is connected to the driving box (206) through a bearing; the driving box (206) is fixed to the bottom end of the supporting positioning tube (101); the cutter head (201) is connected to the universal coupling (210) through the cutter head connecting shaft (202). The other end of the universal coupling (210) is connected to the planetary gear (211); the planetary gear (211) is connected to the planetary carrier (205) fixed on the driving rod (209), and meshes with the internal gear ring of the gear box (212); the planetary carrier (205) can evenly install three planetary gears (211); the gear box (212) is fixed to the top of the supporting positioning tube (101), and is provided with a gear ring inside; the cutter head connecting shaft (202) is connected to the inside of the cutter rod (204) through a bearing, the top of the cutter rod (204) is connected to the horizontal driving rod (203) through the cutter rod support frame (208), and the bottom end is connected to the driving rod (209); the cutter head (201), the cutter head connecting shaft (202), the cutter rod (204), the cutter rod support frame (208), and the universal coupling (210) are evenly installed along the axial direction of the driving rod (209) at intervals of 120°; The soil output mechanism (3) comprises: a soil scraping wheel (301), a soil transport pipe (302), an adjustment positioning buckle (303), a soil transport spiral shaft (304), a soil transport hydraulic motor (305), a chain (306), a vertical spiral steering shaft (307), a horizontal spiral steering shaft (308), a horizontal soil transport steering pipe (309), and a vertical soil transport steering pipe (310); the soil transport pipe (302) is connected to the support positioning pipe (101) through the adjustment positioning buckle (303); both ends of the soil transport spiral shaft (304) are installed in the soil transport pipe (302) through bearings, the top end is connected to the soil scraping wheel (301) through a gear, and the bottom end is connected to the sprocket; The soil transport hydraulic motor (305) is fixed on the soil transport pipe (302) and connected to the sprocket at the bottom end of the soil transport spiral shaft (304) through a chain (306); the front end of the soil transport pipe (302) is installed with a soil pile plate at a certain angle and is provided with a leakage groove, and the rear end is provided with a through hole, which is connected to the vertical soil transport steering pipe (310), and the vertical soil transport steering pipe (310) is connected to the horizontal soil transport steering pipe (309), and the vertical soil transport steering pipe (310) and the horizontal soil transport steering pipe (309) are respectively installed with a vertical spiral steering shaft (307) and a horizontal spiral steering shaft (308); the tail end of the horizontal soil transport steering pipe (309) is provided with a soil discharge port, and the slag is finally discharged from it.

Images