A hob structure for well inversion with enhanced sealing function

Abstract

The utility model discloses a hob structure for a reverse well with a strengthened sealing function, wherein a first sealing cover is provided at a connection between one end of a hob shell and one end of a core shaft, a second sealing cover is provided at a connection between the other end of the hob shell and the other end of the core shaft, a first sealing structure is provided at a connection between the first sealing cover and the hob shell, a second sealing structure is provided at a connection between the second sealing cover and the hob shell, a first sealing mechanism is further provided at a connection between the first sealing cover and the hob shell, the first sealing mechanism is located below the first sealing structure, a second sealing mechanism is further provided at a connection between the second sealing cover and the hob shell, the second sealing mechanism is located below the second sealing structure, and the problem that it is difficult to fully seal the interior of the existing hob during use is solved.

Description

Technical Field

[0001] The utility model belongs to the field of well-turning roller cutters, and relates to a well-turning roller cutter structure with a strengthened sealing function. Background Art

[0002] With the development of coal mines, metal mines, water conservancy and hydropower engineering fields, the application of reverse shaft engineering construction technology is becoming more and more extensive. The application of this technology has completely solved the problems of the previous blasting construction having a great impact on the surrounding environment and low construction safety; the key to realizing this technology lies in the coordinated use of the reverse shaft drilling rig and its matching roller cutter, so the service life of the reverse shaft roller cutter plays a vital role in construction efficiency and construction cost; among them, the sealing of the roller cutter is one of the key factors affecting the service life of the roller cutter. During construction, due to the failure of the roller cutter seal, external pollutants (such as water, rock slag, debris, etc.) enter the roller cutter to destroy the normal operation of the supporting bearing, resulting in eccentric wear of the roller cutter and abnormal wear of the alloy teeth, which slows down the construction progress and ultimately affects the construction progress; and causes early damage to the roller cutter, which shortens the service life, increases the speed of the construction party to replace the roller cutter, and increases the construction cost. Therefore, in order to solve the above-mentioned technical problems, the technical solution of the present application is set. Utility Model Content

[0003] The purpose of the utility model is to provide a hob structure for a well reverser with enhanced sealing function, thereby solving the above-mentioned technical problems.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A roller cutter structure for reverse wells with enhanced sealing function comprises a horizontally arranged core shaft, two ends of the core shaft are respectively provided with through holes connected to a cutter seat, a support bearing is connected to the core shaft, an outer wall of the support bearing is connected to a roller cutter housing, a plurality of combined gold teeth are connected to the outer wall of the roller cutter housing, and the plurality of combined gold teeth are arranged at equal intervals along the roller cutter housing. A first sealing cover is provided at the connection between one end of the roller cutter housing and one end of the core shaft, and a second sealing cover is provided at the connection between the other end of the roller cutter housing and the other end of the core shaft. It is characterized in that a first sealing structure is provided at the connection between the first sealing cover and the roller cutter housing, a second sealing structure is provided at the connection between the second sealing cover and the roller cutter housing, a first sealing mechanism is also provided at the connection between the first sealing cover and the roller cutter housing, and the first sealing mechanism is located below the first sealing structure, a second sealing mechanism is also provided at the connection between the second sealing cover and the roller cutter housing, and the second sealing mechanism is located below the second sealing structure.

[0006] The working principle of the utility model is as follows: through the first sealing structure and the second sealing structure, the first sealing mechanism and the second sealing mechanism, the sealing performance at the two ends of the roller is enhanced, and the service life of the entire roller structure is improved; through the first sealing strip and the second sealing strip, a sealing barrier is respectively arranged on the outside of the two ends of the roller, so as to enhance the sealing performance at the two ends of the roller, and prevent the roller from being damaged due to early sealing failure; the first sealing ring and the first annular sealing ring, the second sealing ring and the second annular sealing ring are aimed at blocking and buffering the external pollutants at the two ends of the roller from entering the interior of the roller, and solves the problem that it is difficult to fully seal the interior during the use of the existing roller.

[0007] Furthermore: the first sealing structure includes a first annular groove, the first annular groove is located on the inner wall of the roller housing, a first sealing strip is provided between the first annular groove and the first sealing cover, and the first sealing strip has a self-lubricating function.

[0008] Furthermore, the second sealing structure includes a second annular groove, which is also located on the inner wall of the hob housing. A second sealing strip is provided between the second annular groove and the second sealing cover, and the second sealing strip also has a self-lubricating function.

[0009] Furthermore: the first sealing mechanism includes at least two groups of first sealing components, the first sealing components are both located between the first sealing cover and the roller cutter housing, and the two groups of first sealing components are arranged side by side and abut against each other.

[0010] Further: the first sealing assembly includes a first sealing ring and a first annular sealing ring, the inner wall of the first sealing ring abuts against the first sealing cover, the outer wall of the first annular sealing ring abuts against the hob housing, and the outer wall of the first sealing ring abuts against the inner wall of the first annular sealing ring.

[0011] Furthermore: the second sealing mechanism comprises at least two groups of second sealing components, the second sealing components are both located between the second sealing cover and the roller cutter housing, and the two groups of second sealing components are arranged side by side and abut against each other.

[0012] Further: the second sealing assembly includes a second sealing ring and a second annular sealing ring, the inner wall of the second sealing ring abuts against the second sealing cover, the outer wall of the second annular sealing ring abuts against the hob housing, and the outer wall of the second sealing ring abuts against the inner wall of the second annular sealing ring.

[0013] Furthermore: a third annular sealing ring is provided at the connection between the first sealing cover and the core shaft, a fourth annular sealing ring is provided at the connection between the support bearing and the core shaft, and a fifth annular sealing ring is provided at the connection between the second sealing cover and the support bearing.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0015] 1. A hob structure for a well with enhanced sealing function, wherein a first sealing strip and a second sealing strip are provided to form a sealing barrier outside the two ends of the hob, respectively, thereby enhancing the sealing performance at the two ends of the hob and preventing the hob from being damaged due to early sealing failure;

[0016] 2. In the present invention, the first sealing ring and the first annular sealing ring, and the second sealing ring and the second annular sealing ring are provided to prevent and buffer the external pollutants at both ends of the hob from entering the interior of the hob. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present utility model and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work, including:

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Markings in the figure: 1-core shaft, 2-through hole, 3-support bearing, 4-hob housing, 5-alloy teeth, 6-first sealing cover, 7-second sealing cover, 8-first annular groove, 9-first sealing strip, 10-second annular groove, 11-second sealing strip, 12-first sealing ring, 13-first annular sealing ring, 14-second sealing ring, 15-second annular sealing ring, 16-third annular sealing ring, 17-fourth annular sealing ring, 18-fifth annular sealing ring. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model, that is, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0022] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] Embodiment 1

[0025] The utility model discloses a hob structure for well inversion with enhanced sealing function, such as Figure 1 As shown, it includes a horizontally arranged core shaft 1, and both ends of the core shaft 1 are respectively provided with through holes 2 connected to the cutter seat, a support bearing 3 is connected to the core shaft 1, and a hob housing 4 is connected to the outer wall of the support bearing 3, and a plurality of combined gold teeth 5 are connected to the outer wall of the hob housing 4, and the plurality of combined gold teeth 5 are arranged at equal intervals along the hob housing 4, and a first sealing cover 6 is provided at the connection between one end of the hob housing 4 and one end of the core shaft 1, and a second sealing cover 7 is provided at the connection between the other end of the hob housing 4 and the other end of the core shaft 1, which is characterized in that: a first sealing structure is provided at the connection between the first sealing cover 6 and the hob housing 4, a second sealing structure is provided at the connection between the second sealing cover 7 and the hob housing 4, a first sealing mechanism is also provided at the connection between the first sealing cover 6 and the hob housing 4, and the first sealing mechanism is located below the first sealing structure, and a second sealing mechanism is also provided at the connection between the second sealing cover 7 and the hob housing 4, and the second sealing mechanism is located below the second sealing structure.

[0026] The first sealing structure comprises a first annular groove 8 , which is located on the inner wall of the hob housing 4 , and a first sealing strip 9 is provided between the first annular groove 8 and the first sealing cover 6 , wherein the first sealing strip 9 has a self-lubricating function.

[0027] The second sealing structure comprises a second annular groove 10 , which is also located on the inner wall of the hob housing 4 . A second sealing strip 11 is provided between the second annular groove 10 and the second sealing cover 7 , and the second sealing strip 11 also has a self-lubricating function.

[0028] The first sealing mechanism comprises at least two groups of first sealing components, both of which are located between the first sealing cover 6 and the hob housing 4, and the two groups of first sealing components are arranged side by side and abut against each other.

[0029] The first sealing assembly includes a first sealing ring 12 and a first annular sealing ring 13 . The inner wall of the first sealing ring 12 abuts against the first sealing cover 6 , the outer wall of the first annular sealing ring 13 abuts against the hob housing 4 , and the outer wall of the first sealing ring 12 abuts against the inner wall of the first annular sealing ring 13 .

[0030] The second sealing mechanism comprises at least two groups of second sealing components, both of which are located between the second sealing cover 7 and the hob housing 4, and the two groups of second sealing components are arranged side by side and abut against each other.

[0031] The second sealing assembly includes a second sealing ring 14 and a second annular sealing ring 15 . The inner wall of the second sealing ring 14 abuts against the second sealing cover 7 , the outer wall of the second annular sealing ring 15 abuts against the hob housing 4 , and the outer wall of the second sealing ring 14 abuts against the inner wall of the second annular sealing ring 15 .

[0032] The specific implementation method of this embodiment is: when the roller cutter is in use, the two ends of the core shaft are fixed on the cutter seat of the reverse well cutter disc by bolt connection. According to the different diameters of the cutter disc, the number of roller cutters installed on each cutter disc is different; the reverse well cutter disc is driven by the drilling rig to revolve, so that the roller cutters installed on the cutter disc are brought into contact with the rock formation and rubbed, and the roller cutters realize the rotation of the roller cutter housing through the internal support bearing device, thereby achieving the purpose of construction drilling.

[0033] By setting the first sealing strip and the second sealing strip, a sealing barrier is set outside the two ends of the hob respectively, thereby strengthening the sealing performance of the two ends of the hob and preventing the hob from being damaged due to early sealing failure.

[0034] The first sealing ring and the first annular sealing ring, and the second sealing ring and the second annular sealing ring are used to block and buffer external pollutants at both ends of the hob from entering the inside of the hob.

[0035] Preferably, a stepped structure is formed at one end of the roller by the first sealing structure and the first sealing mechanism, so as to strengthen the sealing at one end of the roller, and a stepped structure is also formed at the other end of the roller by the second sealing structure and the second sealing mechanism, so as to strengthen the sealing at the other end of the roller.

[0036] The sealing performance at both ends of the hob is enhanced by the first sealing structure and the second sealing structure, the first sealing mechanism and the second sealing mechanism, thereby increasing the service life of the entire hob structure.

[0037] Embodiment 2

[0038] The utility model discloses a hob structure for well inversion with enhanced sealing function, such as Figure 1As shown, a third annular sealing ring 16 is provided at the connection between the first sealing cover 6 and the core shaft 1 , a fourth annular sealing ring 17 is provided at the connection between the support bearing 3 and the core shaft 1 , and a fifth annular sealing ring 18 is provided at the connection between the second sealing cover 7 and the support bearing 3 .

[0039] The specific implementation method of this embodiment is: the third annular sealing ring is used to prevent contaminants from entering the interior of the support bearing through the connection between the first sealing cover and the core shaft, the fourth annular sealing ring is used to prevent contaminants from entering the interior of the support bearing through the connection between the support bearing and the core shaft, and the fifth annular sealing ring is used to prevent contaminants from entering the interior of the support bearing through the connection between the second sealing cover and the support bearing.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A hob cutter structure for a reverse well with enhanced sealing function, comprising a horizontally arranged core shaft (1), two ends of the core shaft (1) are respectively provided with through holes (2) connected to a cutter seat, a support bearing (3) is connected to the core shaft (1), an outer wall of the support bearing (3) is connected to a hob cutter housing (4), a plurality of combined gold teeth (5) are connected to the outer wall of the hob cutter housing (4), the plurality of combined gold teeth (5) are arranged at equal intervals along the hob cutter housing (4), a first sealing cover (6) is provided at the connection between one end of the hob cutter housing (4) and one end of the core shaft (1), and a second sealing cover (7) is provided at the connection between the other end of the hob cutter housing (4) and the other end of the core shaft (1), wherein: A first sealing structure is provided at the connection between the first sealing cover (6) and the hob housing (4), a second sealing structure is provided at the connection between the second sealing cover (7) and the hob housing (4), a first sealing mechanism is further provided at the connection between the first sealing cover (6) and the hob housing (4), the first sealing mechanism is located below the first sealing structure, a second sealing mechanism is further provided at the connection between the second sealing cover (7) and the hob housing (4), the second sealing mechanism is located below the second sealing structure; The first sealing structure comprises a first annular groove (8), the first annular groove (8) being located on the inner wall of the hob housing (4), a first sealing strip (9) being provided between the first annular groove (8) and the first sealing cover (6), and the first sealing strip (9) having a self-lubricating function; The second sealing structure includes a second annular groove (10), which is also located on the inner wall of the hob housing (4). A second sealing strip (11) is provided between the second annular groove (10) and the second sealing cover (7), and the second sealing strip (11) also has a self-lubricating function. The first sealing mechanism comprises at least two groups of first sealing assemblies, both of which are located between the first sealing cover (6) and the hob housing (4), and the two groups of first sealing assemblies are arranged side by side and abut against each other; The second sealing mechanism comprises at least two groups of second sealing assemblies, both of which are located between the second sealing cover (7) and the hob housing (4), and the two groups of second sealing assemblies are arranged side by side and abut against each other; A third annular sealing ring (16) is provided at the connection between the first sealing cover (6) and the core shaft (1), a fourth annular sealing ring (17) is provided at the connection between the support bearing (3) and the core shaft (1), and a fifth annular sealing ring (18) is provided at the connection between the second sealing cover (7) and the support bearing (3).

2. The roller cutter structure for a well turndown with enhanced sealing function according to claim 1, characterized in that: The first sealing assembly comprises a first sealing ring (12) and a first annular sealing ring (13); the inner wall of the first sealing ring (12) abuts against the first sealing cover (6); the outer wall of the first annular sealing ring (13) abuts against the hob housing (4); and the outer wall of the first sealing ring (12) abuts against the inner wall of the first annular sealing ring (13).

3. The roller cutter structure for a well turndown with enhanced sealing function according to claim 1, characterized in that: The second sealing assembly comprises a second sealing ring (14) and a second annular sealing ring (15); the inner wall of the second sealing ring (14) abuts against the second sealing cover (7); the outer wall of the second annular sealing ring (15) abuts against the hob housing (4); and the outer wall of the second sealing ring (14) abuts against the inner wall of the second annular sealing ring (15).

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