A device for dredging the bottom of the hole of a hob bit

Abstract

The present invention discloses a device for dredging the bottom of a hole of a hob bit, which relates to a commercially available hob bit and includes a base assembly, a dredging assembly and a pin shaft. The dredging assembly is rotatably connected to the base assembly through the pin shaft, and the base assembly is welded to the bit bottom plate. When the bit rotates, the base assembly and the dredging assembly rotate along with it. When the dredging assembly encounters unevenness at the bottom of the hole, due to its pin connection with the base assembly, it can automatically adjust its height according to the unevenness at the bottom of the hole, and the sediment at the bottom of the hole will be scraped up and carried away by the flowing mud, achieving the purpose of dredging. The device for dredging the bottom of a hole of a hob bit according to the present invention plays a role in cleaning the sediment on the working surface at the bottom of the hole, making the working surface clean, avoiding the secondary repeated rock breaking of the hob, which is beneficial to improving the drilling efficiency and also beneficial to improving the utilization rate of the hob.

Description

Technical Field

[0001] The present invention relates to the field of drilling construction equipment, and particularly to a device for dredging the bottom of a hob bit hole. Background Art

[0002] In the construction by the drilling method, the rock blocks broken by the hob need to be carried to the ground by flowing mud. Affected by the viscosity of the mud, the flow velocity of the mud, and the lithology of the rock blocks, in actual drilling construction, it is very difficult for the rock blocks broken by the hob to be carried away by the mud, and some rock blocks will sink to the bottom working surface of the hole. This causes the hob to need to break the rock again, resulting in low rock-breaking efficiency and accelerated damage to the hob. Some rock blocks sink to the bottom of the hole and cannot be discharged, making the dredging work at the bottom of the hole very difficult.

[0003] Therefore, it is very necessary to improve the device for dredging the bottom of a hob bit hole. Summary of the Invention

[0004] The main purpose of the present invention is to overcome the deficiencies of the prior art and provide a device for dredging the bottom of a hob bit hole with a simple structure and convenient use.

[0005] To achieve the above object, the present invention provides a device for dredging the bottom of a hob bit hole, which relates to a commercially available hob bit and includes: a base assembly, a dredging assembly, and a pin shaft. The base assembly is arranged on the bottom plate of the bit and is located behind the hob, and the dredging assembly is rotatably connected to the base assembly;

[0006] The dredging assembly includes a pull rod and a scraper. The scraper is arranged at the bottom of the pull rod and contacts the bottom working surface of the hole.

[0007] Further, a limiting plate is arranged at the bottom of the base assembly to prevent the dredging assembly from rotating towards the position corresponding to the hob.

[0008] Further, the dredging assembly further includes a bottom slide plate. One end of the long side of the bottom slide plate is connected to the end of the scraper, and the other end of the long side is connected to the lower end of the pull rod. A triangular structure is formed among the bottom slide plate, the scraper, and the pull rod.

[0009] Further, the pull rod is U-shaped.

[0010] Further, the base assembly includes a bottom plate, a base ear plate, a baffle plate, and a reinforcing plate. The bottom plate is installed at the bottom of the bit bottom plate, the base ear plate is installed at the bottom of the bottom plate, the baffle plate is connected to one side of the base ear plate, and the reinforcing plate is arranged between the limiting plate and the baffle plate.

[0011] Further, a dredging ear plate is provided at the top of the pull rod. A hole slot for the pin shaft to pass through is provided on the dredging ear plate. The pin shaft passes through the hole slot to rotatably connect the dredging ear plate to the base ear plate.

[0012] The beneficial effects of the present invention are reflected in that: the dredging component is rotatably connected to the base component through a pin shaft, and the base component is welded to the drill bit bottom plate. When the drill bit rotates, the base component and the dredging component rotate along with it. When the dredging component encounters unevenness at the bottom of the hole

[0013] Normally, due to its pin shaft connection with the base component, it can automatically adjust its height according to the unevenness at the bottom of the hole. The sediment at the bottom of the hole will be scraped up and carried away by the flowing mud, achieving the purpose of dredging, playing a role in cleaning the sediment on the working surface at the bottom of the hole, making

[0014] the working surface clean, avoiding the secondary repeated rock breaking of the hob, which is beneficial to improving the drilling efficiency and also beneficial to improving the utilization rate of the hob. At the same time, the limit plate prevents the collision between the dredging component and the hob, making the device safer during operation. Description of the Drawings

[0015] Figure 1 Schematic diagram of the installation position of the bottom-hole dredging device for this hob drill bit;

[0016] 0 Figure 2 Schematic diagram of the structure of the bottom-hole dredging device for this hob drill bit;

[0017] Figure 3 Schematic sectional view of the bottom-hole dredging device for this hob drill bit;

[0018] Figure 4 Schematic diagram of the structure of the base component of the bottom-hole dredging device for this hob drill bit;

[0019] Figure 5 Schematic sectional view of the base component of the bottom-hole dredging device for this hob drill bit;

[0020] Figure 6 Schematic sectional view of the dredging component of the bottom-hole dredging device for this hob drill bit;

[0021] 5 Figure 7 Schematic diagram of the structure of the dredging component of the bottom-hole dredging device for this hob drill bit;

[0022] Description of the reference numerals: 1. Base component; 2. Dredging component; 3. Pin shaft; 11. Bottom plate; 12. Base ear plate;

[0023] 13. Baffle; 14. Limit plate; 15. Reinforcing plate; 21. Dredging ear plate; 22. Pull rod; 23. Scraper; 24. Bottom slide plate. Detailed Embodiments

[0024] The following will clearly and completely explain the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention.

[0025] It is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] 5 It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc.,

[0027] The directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the "first", "second", etc.

[0029] The descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" means more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] See also Figures 1 to 7 .

[0031] The present invention relates to a commercially available roller cutter drill bit, comprising: a base assembly 1, a dredging assembly 2 and a pin 3, wherein the base assembly 1 is arranged on a drill bit bottom plate 11 and is located at the rear side of the roller cutter, and the dredging assembly 2 is rotatably connected to the base assembly 1;

[0032] The dredging component 2 includes a pull rod 22 and a scraper 23. The scraper 23 is arranged at the bottom of the pull rod 22 and contacts the working surface of the hole bottom. With this design, as the drill bit rotates, the dredging component 2 also rotates. When the scraper 23 encounters unevenness at the hole bottom, due to its rotational connection with the base component, it can automatically adjust its height according to the height of the hole bottom, and the sediment at the hole bottom will be scraped up and carried away by the flowing mud, achieving the purpose of dredging.

[0033] In one embodiment, a limiting plate 14 is arranged at the bottom of the base component 1 to prevent the dredging component 2 from rotating towards the position corresponding to the hob.

[0034] In one embodiment, the dredging component 2 further includes a bottom slide plate 24. One end of the long side of the bottom slide plate 24 is connected to the end of the scraper 23, and the other end of the long side is connected to the lower end of the pull rod 22. A triangular structure is formed among the bottom slide plate 24, the scraper 23, and the pull rod 22. With this design, the scraper 23 is not easily damaged by large pieces of sediment during operation, enhancing the durability of the device.

[0035] In one embodiment, the pull rod 22 is U-shaped.

[0036] In one embodiment, the base component 1 includes a bottom plate 11, base ear plates 12, a baffle 13, and a reinforcing plate 15. The bottom plate 11 is installed at the bottom of the drill bit bottom plate 11, the base ear plates 12 are installed at the bottom of the bottom plate 11, the baffle 13 is connected to one side of the base ear plates 12, and the reinforcing plate 15 is arranged between the limiting plate 14 and the baffle 13. With this design, the baffle 13, the reinforcing plate 15, and the limiting plate 14 form a stable limiting structure to prevent the dredging device 2 from colliding with the hob in front.

[0037] In one embodiment, a dredging ear plate 21 is arranged at the top of the pull rod 22. A hole groove for the pin shaft 3 to pass through is formed on the dredging ear plate 21, and the pin shaft passes through the hole groove to rotatably connect the dredging ear plate to the base ear plate.

[0038] In one embodiment, the scraper 23 is provided with a groove corresponding to the pull rod 22. The scraper 23 is arranged at the lower end of the pull rod 22 while both sides of the pull rod 22 are embedded in the grooves on the scraper 23.

[0039] In one embodiment, both the lengths of the scraper 23 and the bottom slide plate 24 are longer than that of the pull rod 22. With this design, the stirring range of the scraper 23 and the bottom slide plate 24 is larger, the dredging range is larger, and the effect is better.

[0040] It should be understood that the examples and embodiments described herein are for illustrative purposes only and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes based on it. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A device for dredging the bottom of a hole of a hob bit, related to a hob bit, comprising: A base assembly (1), a dredging assembly (2) and a pin shaft (3), wherein the base assembly (1) is arranged on the drill bit base plate and located at the rear side of the hob, and the dredging assembly (2) is rotatably connected to the base assembly (1); The dredging assembly (2) includes a pull rod (22) and a scraper (23), the scraper (23) is arranged at the bottom of the pull rod (22) and contacts the working surface; A limiting plate (14) is arranged at the bottom of the base assembly (1) to prevent the dredging assembly (2) from rotating towards the position corresponding to the hob; The dredging assembly (2) further includes a bottom slide plate (24), one end of the long side of the bottom slide plate (24) is connected to the end of the scraper (23), and the other end of the long side is connected to the lower end of the pull rod (22). A triangular structure is formed among the bottom slide plate (24), the scraper (23) and the pull rod (22); The base assembly (1) includes a base plate (11), a base ear plate (12), a baffle plate (13) and a reinforcing plate (15). The base plate (11) is installed at the bottom of the drill bit base plate, the base ear plate (12) is installed at the bottom of the base plate (11), the baffle plate (13) is connected to one side of the base ear plate (12), and the reinforcing plate (15) is arranged between the limiting plate (14) and the baffle plate (13); A dredging ear plate (21) is arranged at the top of the pull rod (22), and a hole slot for the pin shaft (3) to pass through is formed on the dredging ear plate (21). The pin shaft (3) passes through the hole slot to rotatably connect the dredging ear plate (21) to the base ear plate (12).

2. The device for dredging the bottom of the hob drill hole according to claim 1, characterized in that, The pull rod (22) is U-shaped.

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