Built-in floating cavity type squeezing and expanding reamer

Abstract

The utility model relates to the technical field of a reamer, in particular to a built-in floating cavity type squeezing and expanding reamer, which is characterized in that a layer of inner cone cover is additionally arranged in a front cone cover and a rear cone cover to form a floating cavity, so that the space capable of being filled by slurry is reduced, and the weight of the reamer during use is reduced; comprising a mandrel; the device further comprises a reaming mechanism and an inner supporting mechanism, the reaming mechanism is installed on the mandrel and facilitates reaming, and the inner supporting mechanism is installed on the reaming mechanism and facilitates reduction of slurry entering amount.

Description

Technical Field

[0001] The utility model relates to the technical field of reamer, in particular to a built-in floating cavity type extrusion reamer. Background Art

[0002] Trenchless technology refers to a technology and method for detecting, inspecting, repairing and laying various underground public facilities without excavating the surface. A product used in the actual construction process is called a hole reamer. The hole reamer is a device that contacts and breaks the rock during the construction process of hole reaming and crossing.

[0003] Existing hole expanders, such as a plate-type hole squeezing and hole expander disclosed in the utility model patent with application number 202120267111.4, have a main structure including a core shaft, two parallel supporting disc plates welded on the core shaft, a straight cylinder welded on the outer circumference of the supporting disc plate, a front cone welded at the right end of the core shaft and the straight cylinder near the power input end, a front knife tooth plate welded on the outer surface of the front cone and the core shaft, the outer end face of the front knife tooth plate and the outer circumferential wall of the straight cylinder are on the same straight line, the front knife teeth are welded on the inclined tooth surface of the front knife tooth plate, a rear cone is welded on the left end of the straight cylinder and the core shaft, and the rear knife teeth are welded on the rear cone; when in use, a reinforcing rib plate is welded between the supporting disc plate and the core shaft to improve the bearing capacity of the supporting disc plate, and several front knife teeth are evenly spaced on the tooth surface of the front knife tooth plate to ensure the stability of cutting and expanding the hole during forward movement.

[0004] However, when the existing squeeze-expanding reamer is in use, a large amount of mud will be filled in the front and rear cone cavities, thereby increasing the weight of the reamer and increasing the resistance when the reamer is pulled. Utility Model Content

[0005] To solve the above technical problems, the utility model provides a built-in floating cavity type extrusion reamer which forms a floating cavity by adding an inner cone cover inside the front and rear cone covers, thereby reducing the space that can be filled with mud and reducing the weight of the reamer when in use.

[0006] The utility model provides a built-in floating cavity type extrusion expander, comprising a core shaft; further comprising a reaming mechanism and an internal support mechanism, wherein the reaming mechanism is mounted on the core shaft and facilitates reaming, and the internal support mechanism is mounted on the reaming mechanism and facilitates reducing the amount of mud entering; the device pulls the reaming mechanism to move in the hole through the core shaft, and the reaming mechanism expands the diameter of the opening when moving in the hole, and a floating cavity is formed inside the reaming mechanism by providing the internal support mechanism, thereby reducing the space that can be filled with mud and reducing the weight of the reamer when in use.

[0007] Preferably, the reaming mechanism includes a front baffle, a rear baffle and a straight cylinder, the front baffle is installed on the core shaft, the rear baffle is installed on the core shaft and the front baffle and the rear baffle are parallel, and the straight cylinder is installed on the front baffle and the rear baffle; by setting the front baffle and the rear baffle, it is convenient to support the straight cylinder and facilitate the core shaft to drive the straight cylinder to reaming.

[0008] Preferably, the reaming mechanism further includes a front cone and a rear cone, the front cone is mounted on the front baffle, and the rear cone is mounted on the rear baffle; by providing the front cone and the rear cone, the resistance encountered during reaming of the straight cylinder is reduced, thereby increasing the reaming rate.

[0009] Preferably, the internal support mechanism includes a front inner cone cover and a rear inner cone cover, the front inner cone cover is mounted on the front baffle and located inside the front cone, forming a mud-filled space between the front cone and the rear cone, and the rear inner cone cover is mounted on the rear baffle and located inside the rear cone, forming a mud-filled space between the rear cone and the rear cone; by setting the front inner cone cover and the rear inner cone cover, floating cavities are respectively formed between the front inner cone cover and the front baffle, and between the rear inner cone cover and the rear baffle, thereby reducing the space that can be filled with mud and reducing the weight of the reamer when in use.

[0010] Compared with the prior art, the beneficial effects of the present invention are: the equipment pulls the reaming mechanism to move in the hole through the core shaft, and the reaming mechanism expands the hole diameter when moving in the hole. By setting an internal support mechanism, a floating cavity is formed inside the reaming mechanism, reducing the space that can be filled with mud and reducing the weight of the reamer when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0013] Markings in the accompanying drawings: 01, core shaft; 02, expansion mechanism; 21, front partition; 22, rear partition; 23 straight cylinder; 24, front cone; 25, rear cone; 03, internal support mechanism; 31, front inner cone cover; 32, rear inner cone cover. DETAILED DESCRIPTION

[0014] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0015] Example 1

[0016] The utility model is a built-in floating chamber extrusion expander, comprising a core shaft 01; further comprising a reaming mechanism 02 and an inner support mechanism 03, the reaming mechanism 02 being mounted on the core shaft 01 and facilitating reaming, the inner support mechanism 03 being mounted on the reaming mechanism 02 and facilitating reducing the amount of mud entering; the reaming mechanism 02 comprising a front baffle 21, a rear baffle 22 and a straight cylinder 23, the front baffle 21 being mounted on the core shaft 01, the rear baffle 22 being mounted on the core shaft 01 and the front baffle 21 and the rear baffle 22 being parallel, the straight cylinder 23 being mounted on the front baffle 21 and the rear baffle 22 On the partition 21 and the rear partition 22; the reaming mechanism 02 also includes a front cone 24 and a rear cone 25, the front cone 24 is installed on the front partition 21, and the rear cone 25 is installed on the rear partition 22; when it is working, first, the equipment pulls the core shaft 01 to move in the hole, and the front partition 21 and the rear partition 22 are arranged to facilitate the support of the straight cylinder 23, so that the core shaft 01 can drive the straight cylinder 23 to reaming. By setting the front cone 24 and the rear cone 25, the resistance encountered by the straight cylinder 23 during reaming is reduced, and the reaming rate is increased.

[0017] Example 2

[0018] like Figures 1 to 2 As shown, the utility model is a built-in floating chamber extrusion expander, based on Example 1; the inner support mechanism 03 includes a front inner cone cover 31 and a rear inner cone cover 32, the front inner cone cover 31 is installed on the front partition 21 and is located inside the front cone 24, forming a mud filling space between the front cone 24, and the rear inner cone cover 32 is installed on the rear partition 22 and is located inside the rear cone 25, forming a mud filling space between the rear cone 25; when it is working, first, the device pulls the core shaft 01 in When the reamer moves in the hole, the front baffle 21 and the rear baffle 22 are provided to support the straight cylinder 23, so that the core shaft 01 can drive the straight cylinder 23 to expand the hole. The front cone 24 and the rear cone 25 are provided to reduce the resistance encountered by the straight cylinder 23 during expansion and increase the expansion rate. The front inner cone cover 31 and the rear inner cone cover 32 are provided to form floating cavities between the front inner cone cover 31 and the front baffle 21, and between the rear inner cone cover 32 and the rear baffle 22, thereby reducing the space that can be filled with mud and reducing the weight of the reamer when in use.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A built-in floating cavity extrusion expander, comprising a core shaft (01); characterized in that: The invention also comprises a hole-expanding mechanism (02) and an inner supporting mechanism (03). The hole-expanding mechanism (02) is mounted on the core shaft (01) and facilitates hole expansion. The inner supporting mechanism (03) is mounted on the hole-expanding mechanism (02) and facilitates reducing the amount of mud entering.

2. The internal floating cavity extrusion reamer according to claim 1, characterized in that: The hole expansion mechanism (02) comprises a front baffle (21), a rear baffle (22) and a straight cylinder (23), wherein the front baffle (21) is mounted on the core shaft (01), the rear baffle (22) is mounted on the core shaft (01) and the front baffle (21) and the rear baffle (22) are parallel, and the straight cylinder (23) is mounted on the front baffle (21) and the rear baffle (22).

3. The internal floating cavity extrusion reamer according to claim 2, characterized in that: The hole expanding mechanism (02) further comprises a front cone (24) and a rear cone (25), wherein the front cone (24) is mounted on the front partition (21), and the rear cone (25) is mounted on the rear partition (22).

4. The internal floating cavity extrusion reamer according to claim 3, characterized in that: The inner support mechanism (03) includes a front inner cone cover (31) and a rear inner cone cover (32). The front inner cone cover (31) is installed on the front partition (21) and is located inside the front cone (24), forming a mud-filled space between the front inner cone cover (31) and the front cone (24). The rear inner cone cover (32) is installed on the rear partition (22) and is located inside the rear cone (25), forming a mud-filled space between the rear inner cone cover (32) and the rear cone (25).

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