A three-telescopic column for mining

Abstract

The utility model belongs to the technical field of telescopic columns for mining, and particularly relates to a three-telescopic column for mining; a primary hydraulic cylinder, a secondary hydraulic cylinder, a tertiary hydraulic cylinder and a live column, characterized in that: the three-stage hydraulic cylinder is slidably provided with a live column, the secondary hydraulic cylinder is slidably provided with a tertiary hydraulic cylinder, and the primary hydraulic cylinder is slidably provided with a secondary hydraulic cylinder; wherein dustproof components and adsorption components are provided between the connections of the primary hydraulic cylinder, the secondary hydraulic cylinder, the tertiary hydraulic cylinder and the live column. A dustproof component is provided to prevent dust from entering through gaps, and an adsorption component is provided to adsorb residual dust on the cylinder body. When dust enters the inner wall of the cavity, the dust will cause scratches when the surface of the cylinder body rubs against the inner wall of the cavity of the upper cylinder body when the cylinder body is repeatedly extended and retracted, thereby preventing dust from entering and increasing the service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of telescopic columns for mining, in particular to a three-telescopic column for mining. Background Art

[0002] In the mining process, hydraulic supports are key support equipment. At present, the columns of hydraulic supports are double telescopic columns, but when faced with complex geological conditions such as changes in ore layer thickness or the need to cross faults, the telescopic range and adaptability of double telescopic columns are limited. The solution of the prior art corresponding to this technical scheme: At present, in order to solve the above problems, some mines have begun to try to use three telescopic columns to improve the telescopic ratio and adaptability of the support. When the traditional three-telescopic rod column works under high pressure, the ore and rock dust that falls during the mining process will enter the gap, accumulate in the gap, and rub against the inner wall of the cylinder body and seals such as sealing rings as the hydraulic column expands and contracts, scratching the inner wall of the cylinder body or damaging its internal seals, reducing the service life of the hydraulic column.

[0003] China's public patent number CN208486901 U mining hydraulic support three telescopic columns, including a first-level hydraulic cylinder, a second-level hydraulic cylinder, a third-level hydraulic cylinder and a live column, wherein the third-level hydraulic cylinder sleeve is arranged on the live column, the second-level hydraulic cylinder sleeve is arranged on the third-level hydraulic cylinder, the first-level hydraulic cylinder sleeve is arranged on the second-level hydraulic cylinder, the first-level hydraulic cylinder is provided with a first piston, the second-level hydraulic cylinder is provided with a second piston, the third-level hydraulic cylinder is provided with a third piston, and the live column is provided with a fourth piston, characterized in that: a booster auxiliary chamber is provided on the live column, and the lower chamber of the first-level hydraulic cylinder is connected with the lower chamber of the second-level hydraulic cylinder The lower chamber of the secondary hydraulic cylinder is connected with the lower chamber of the tertiary hydraulic cylinder and the booster auxiliary chamber on the plunger through an isobaric tube, the lower chamber of the tertiary hydraulic cylinder is connected with the booster auxiliary chamber on the plunger, the primary hydraulic cylinder is provided with an emulsion inlet A, the emulsion inlet A is connected with the lower chamber of the primary hydraulic cylinder, the secondary hydraulic cylinder is provided with an emulsion inlet B, the emulsion inlet B is connected with the upper chamber of the secondary hydraulic cylinder, the tertiary hydraulic cylinder is provided with an emulsion inlet C, the emulsion inlet C is connected with the upper chamber of the tertiary hydraulic cylinder through the inner chamber of the plunger. However, dust generated by the ore and rock between the hydraulic cylinders of the device easily enters the upper chamber, causing loss between the hydraulic cylinders. Utility Model Content

[0004] The utility model aims to solve the above-mentioned technical problems and provide a three-telescopic column for mining, so as to reduce the dust generated by the ore rock from entering the interior of the telescopic column.

[0005] In view of this, the utility model provides a three-telescopic column for mining, including a first-level hydraulic cylinder, a second-level hydraulic cylinder, a third-level hydraulic cylinder and a live column, characterized in that: the third-level hydraulic cylinder is slidably provided with a live column, the second-level hydraulic cylinder is slidably provided with a third-level hydraulic cylinder, and the first-level hydraulic cylinder is slidably provided with a second-level hydraulic cylinder; wherein, a dustproof component and an adsorption component are provided between the connection between the upper-level cylinder body and the lower-level cylinder body of the first-level hydraulic cylinder, the second-level hydraulic cylinder, the third-level hydraulic cylinder and the live column.

[0006] In this technical solution, a three-stage hydraulic cylinder is added to the double telescopic column to increase the telescopic amount of the entire telescopic column. The hydraulic oil enters the first cavity along the hydraulic oil inlet, and the secondary cylinder body in the first cavity begins to extend outward. A dust-proof component is set between the connections to prevent dust from entering through the gaps, and an adsorption component is set to adsorb the residual dust on the cylinder body. Dust enters the inner wall of the cavity. When the cylinder body repeatedly expands and contracts, the dust will cause scratches when the surface of the cylinder body and the inner wall of the cavity of the upper cylinder body rub against each other, so dust is prevented from entering and the service life is increased.

[0007] In the above technical solution, further, the dust-proof component is arranged in the annular cover plate, and the three annular cover plates are respectively fixed at the top openings of the cylinder bodies of the first-stage hydraulic cylinder, the second-stage hydraulic cylinder and the third-stage hydraulic cylinder, including an oil scraper plate and a first oil pushing device, and the oil scraper plate is arranged below the first oil pushing device.

[0008] In the above technical solution, further, the first oil pushing device includes a connecting block, the connecting block is arranged on the inner wall of the annular cover plate, the connecting block is connected to the first spring, and the other end of the first spring is connected to the first shrink ring.

[0009] In the above technical solution, further, the outer wall of the shrink ring is provided with an arcuate groove with a semicircular cross-section, the arcuate groove is connected to the first spring, and the first shrink ring is connected to the second spring at both ends.

[0010] In this technical solution, when the cylinder body is retracted into the cavity of the upper cylinder body, the scraper scrapes off the lubricating oil on the upper surface of the cylinder body and accumulates it on the surface of the first shrink ring. When the cylinder body is extended into the cavity of the upper cylinder body, the first shrink ring, in cooperation with the first spring and the second spring, pushes the lubricating oil previously accumulated on the surface of the first shrink ring to the surface of the cylinder body. This prevents the lubricating oil from carrying dust into the cavity. When the cylinder body is repeatedly operated, the lubricating oil can also be reused to form an oil film on the surface of the cylinder body for protection.

[0011] In the above technical scheme, further, the adsorption assembly includes an annular shell, and the three outer walls of the annular shell are respectively arranged on the inner walls of the cavities of the first-stage hydraulic cylinder, the second-stage hydraulic cylinder and the third-stage hydraulic cylinder. A dust suction ring is arranged on the inner wall of the annular shell, and a second oil pushing device is arranged at the bottom of the dust suction ring. The second oil pushing device has the same structure as the first oil pushing device.

[0012] In the above technical solution, further, the second oil pushing device pushes the lubricating oil to the cylinder surface and the inner wall of the upper cylinder cavity for lubrication, and the first oil pushing device pushes the lubricating oil to the cylinder surface for dust prevention.

[0013] In the above technical solution, further, a plastic ring with a circular arc cross section is arranged on the top of the dust suction ring away from the circular ring shell, and an oil scraper is arranged on the bottom of the plastic ring.

[0014] In this technical solution, when the cylinder body extends out of the cavity of the upper cylinder body, the bottom of the dust suction ring scrapes off the lubricating oil on the upper surface of the cylinder body and in the cavity of the upper cylinder body, and accumulates it on the surface of the second shrink ring. When the cylinder body retracts into the cavity of the upper cylinder body, the plastic ring on the top of the dust suction ring generates static electricity by rubbing against the surface of the cylinder body, and electrostatically adsorbs the dust on the surface of the cylinder body. The second shrink ring, with the cooperation of the third spring and the fourth spring, pushes the lubricating oil previously accumulated on the surface of the second shrink ring to the surface of the cylinder body. There will still be residual dust attached to the surface of the cylinder body through the dustproof component to prevent dust from entering the cavity. The dust suction ring adsorbs the residual dust. When the cylinder body operates repeatedly, friction loss is prevented between the surface of the cylinder body and the inner wall of the cavity of the upper cylinder body. The surface of the cylinder body in the cavity is lubricated and smeared by the second oil pushing device.

[0015] The beneficial effects of the utility model are:

[0016] 1. By setting up dust-proof components, the lubricating oil can be prevented from carrying dust into the cavity. The lubricating oil can also be reused when the cylinder body is repeatedly operated to form an oil film on the surface of the cylinder body for protection.

[0017] 2. By setting up an adsorption component, residual dust will still adhere to the surface of the cylinder body through the dustproof component to prevent dust from entering the cavity. The dust suction ring adsorbs the residual dust. When the cylinder body operates repeatedly, friction loss between the cylinder body surface and the inner wall of the cavity of the upper cylinder body is avoided. The cylinder body surface in the cavity is lubricated by the second oil pushing device. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the connection structure of the utility model;

[0021] Figure 4 It is a cross-sectional view of the dustproof component of the utility model;

[0022] Figure 5It is a cross-sectional view of the dust collection component disc of the utility model;

[0023] Figure 6 This is a structural schematic diagram of the oil pushing device of the utility model;

[0024] The symbols in the figure are:

[0025] 1. First-stage hydraulic cylinder; 2. Second-stage hydraulic cylinder; 3. Third-stage hydraulic cylinder; 4. Piston; 5. Hydraulic oil inlet; 6. Emergency pressure relief port; 7. First cavity; 8. Second cavity; 9. Third cavity; 10. Pressurization auxiliary cavity; 11. Dustproof component; 12. Adsorption component; 13. Ring cover; 14. First shrink ring; 15. Second spring; 16. First spring; 17. Oil scraper; 18. Ring shell; 19. Dust suction ring; 20. Second shrink ring; 21. Fourth spring; 22. Third spring; 23. Connecting block; 24. Arc groove; 25. Plastic ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0027] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0029] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0030] It should be noted that, in the present application, the terms "comprise", "include" or any other variant 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, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0031] Embodiment 1:

[0032] This embodiment provides a three-telescopic column for mining, such as Figure 1The first-stage hydraulic cylinder 1, the second-stage hydraulic cylinder 2, the third-stage hydraulic cylinder 3 and the plunger 4 are characterized in that: the third-stage hydraulic cylinder 3 is provided with the plunger 4 in a sliding manner, the second-stage hydraulic cylinder 2 is provided with the third-stage hydraulic cylinder 3 in a sliding manner, and the first-stage hydraulic cylinder 1 is provided with the second-stage hydraulic cylinder 2 in a sliding manner; wherein, the first-stage hydraulic cylinder 1, the second-stage hydraulic cylinder 2, the third-stage hydraulic cylinder 3 and the plunger 4, a dustproof component 11 and an adsorption component 12 are provided between the connection between the upper-stage cylinder body and the lower-stage cylinder body. For the double telescopic column, the third-stage hydraulic cylinder 3 is added to increase the telescopic amount of the entire telescopic column, the hydraulic oil enters the first cavity 7 along the hydraulic oil inlet, and the second-stage cylinder body in the first cavity 7 begins to extend outward, the dustproof component 11 is provided between the connections to prevent dust from entering from the gap, and the adsorption component 12 is provided to adsorb the residual dust on the cylinder body. When the dust enters the inner wall of the cavity, the dust will produce scratches when the cylinder body surface and the inner wall of the cavity of the upper-stage cylinder body rub against each other when the cylinder body is repeatedly extended and retracted, so as to prevent dust from entering and increase the service life.

[0033] like Figure 4 The dustproof component 11 shown is arranged in the annular cover plate 13, and the three annular cover plates 13 are respectively fixedly arranged at the top openings of the cylinder bodies of the first-stage hydraulic cylinder 1, the second-stage hydraulic cylinder 2 and the third-stage hydraulic cylinder 3, and include an oil scraper 17 and a first oil pushing device, and the oil scraper 17 is arranged below the first oil pushing device.

[0034] like Figure 6 The first oil pushing device shown includes a connecting block 23, which is arranged on the inner wall of the annular cover plate 13, and the connecting block 23 is connected to the first spring 16, and the other end of the first spring 16 is connected to the first shrink ring 14. The outer wall of the shrink ring is provided with an arc groove 24 with a semicircular cross section, and the arc groove 24 is connected to the first spring 16, and the first shrink ring 14 is connected to the second spring 15 at both ends.

[0035] When the cylinder body is retracted into the cavity of the upper cylinder body, the scraper plate 17 scrapes off the lubricating oil on the upper surface of the cylinder body and accumulates it on the surface of the first shrink ring 14. When the cylinder body is extended into the cavity of the upper cylinder body, the first shrink ring 14 pushes the lubricating oil previously accumulated on the surface of the first shrink ring 14 to the surface of the cylinder body with the cooperation of the first spring 16 and the second spring 15. This prevents the lubricating oil from carrying dust into the cavity. When the cylinder body is repeatedly operated, the lubricating oil can also be reused to form an oil film on the surface of the cylinder body for protection.

[0036] like Figure 5The adsorption assembly 12 includes a circular outer shell 18, the outer walls of the three circular outer shells 18 are respectively arranged on the inner walls of the cavities of the first-stage hydraulic cylinder 1, the second-stage hydraulic cylinder 2 and the third-stage hydraulic cylinder 3, the inner wall of the circular outer shell 18 is provided with a dust suction ring 19, and the bottom of the dust suction ring 19 is provided with a second oil pushing device, and the second oil pushing device and the first oil pushing device have the same structure. The second oil pushing device pushes the lubricating oil to the surface of the cylinder body and the inner wall of the cavity of the upper-stage cylinder body for lubrication, and the first oil pushing device pushes the lubricating oil to the surface of the cylinder body for dust prevention.

[0037] like Figure 6 As shown, a plastic ring 25 with a circular arc cross section is arranged on the top of the dust suction ring 19 away from the circular shell 18 , and an oil scraper is arranged at the bottom of the plastic ring 25 .

[0038] When the cylinder body extends out of the cavity of the upper cylinder body, the bottom of the dust suction ring 19 scrapes off the lubricating oil on the upper surface of the cylinder body and in the cavity of the upper cylinder body, and accumulates it on the surface of the second shrink ring 20. When the cylinder body retracts into the cavity of the upper cylinder body, the plastic ring 25 on the top of the dust suction ring 19 generates static electricity by rubbing against the surface of the cylinder body, and electrostatically adsorbs the dust on the surface of the cylinder body. The second shrink ring 20, with the cooperation of the third spring 22 and the fourth spring 21, pushes the lubricating oil previously accumulated on the surface of the second shrink ring 20 to the surface of the cylinder body. There will still be residual dust attached to the surface of the cylinder body through the dustproof component 11, to prevent dust from entering the cavity. The dust suction ring 19 adsorbs the residual dust. When the cylinder body repeatedly operates, friction loss is prevented between the surface of the cylinder body and the inner wall of the cavity of the upper cylinder body, and the surface of the cylinder body in the cavity is lubricated and smeared through the second oil pushing device.

[0039] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A three-telescopic column for mining, comprising a primary hydraulic cylinder (1), a secondary hydraulic cylinder (2), a tertiary hydraulic cylinder (3) and a plunger (4), characterized in that: The three-stage hydraulic cylinder (3) is slidably provided with a piston (4), the two-stage hydraulic cylinder (2) is slidably provided with a three-stage hydraulic cylinder (3), and the first-stage hydraulic cylinder (1) is slidably provided with a two-stage hydraulic cylinder (2); Wherein, a dustproof component (11) and an adsorption component (12) are arranged between the connection between the upper cylinder body and the lower cylinder body of the first-stage hydraulic cylinder (1), the second-stage hydraulic cylinder (2), the third-stage hydraulic cylinder (3) and the piston (4).

2. A three-telescopic column for mining according to claim 1, characterized in that: The dustproof component (11) is arranged in the annular cover plate (13), and the three annular cover plates (13) are respectively fixedly arranged at the top openings of the cylinder bodies of the first-stage hydraulic cylinder (1), the second-stage hydraulic cylinder (2) and the third-stage hydraulic cylinder (3), and include an oil scraper (17) and a first oil pushing device, and the oil scraper (17) is arranged at the bottom of the first oil pushing device.

3. A three-telescopic column for mining according to claim 2, characterized in that: The first oil pushing device comprises a connecting block (23), the connecting block (23) is arranged on the inner wall of the annular cover plate (13), the connecting block (23) is connected to a first spring (16), and the other end of the first spring (16) is connected to a first shrink ring (14).

4. A three-telescopic column for mining according to claim 3, characterized in that: The outer wall of the shrink ring is provided with an arc-shaped groove (24) with a semicircular cross-section, the arc-shaped groove (24) is connected to the first spring (16), and the first and second ends of the first shrink ring (14) are connected to the second spring (15).

5. The three-telescopic column for mining according to claim 1 is characterized in that: The adsorption assembly (12) comprises an annular outer shell (18), the outer walls of the three annular outer shells (18) are respectively arranged on the inner walls of the cavities of the first-stage hydraulic cylinder (1), the second-stage hydraulic cylinder (2) and the third-stage hydraulic cylinder (3), the inner wall of the annular outer shell (18) is provided with a dust suction ring (19), and the bottom of the dust suction ring (19) is provided with a second oil pushing device, and the second oil pushing device has the same structure as the first oil pushing device.

6. A three-telescopic column for mining according to claim 5, characterized in that: The second oil pushing device pushes the lubricating oil onto the surface of the cylinder body and the inner wall of the upper cylinder cavity for lubrication, and the first oil pushing device pushes the lubricating oil onto the surface of the cylinder body for dust prevention.

7. A three-telescopic column for mining according to claim 5, characterized in that: A plastic circular ring (25) with a circular arc cross section is arranged on the top of the dust suction ring (19) away from the circular ring shell (18), and an oil scraper (17) is arranged on the bottom of the plastic circular ring (25).

Images