A core drill feed cylinder

Abstract

The utility model belongs to the prospecting engineering equipment technical field, concretely is a kind of rock core drilling machine feed oil cylinder, including oil cylinder body and the upper end cover of being arranged in the oil cylinder body front end, it is characterized in that, the front end of the upper end cover is provided with first flange plate, the front end of the first flange plate is bolted with second flange plate, and first oil seal is arranged between the first flange plate and second flange plate, and the front end of the second flange plate is provided with first dust cover, the utility model greatly alleviates the phenomenon of oil leakage of feed oil cylinder, solves the technical problem of serious oil leakage phenomenon of feed oil cylinder in prior art.

Description

Technical Field

[0001] This utility model relates to the field of mineral exploration equipment technology; specifically, it relates to a feed cylinder for a core drilling rig. Background Technology

[0002] Core drilling rigs are ultra-deep borehole exploration equipment, characterized by deep drilling, long feed stroke, short auxiliary time, high drilling efficiency, light weight, convenient operation, strong disassembly capability, reasonable structure, and easy relocation. These rigs feature short transmission routes, high transmission efficiency, large capacity, high reliability, and a high degree of standardization. They are the preferred equipment for deep exploration and can also meet the development needs of deep water wells, and shallow to medium-depth oil and gas formations. For example, the XY-3000 core drilling rig is one such example.

[0003] When performing coalfield geological drilling, this drilling rig can be equipped with φ89mm wireline drill rods. During operation, severe oil leakage was found in the feed cylinder. Replacing all oil seals and accessories provided short-term relief, but the leakage recurred after a few days. Analysis revealed two main causes: (1) When the drilling rig is in a high-speed position for drilling operations, if the hydraulic cylinder is raised to its highest position, the rotary head will drive the vertical shaft (i.e., the active drill rod) to rotate. At this time, the vertical shaft swings significantly, causing the two feed cylinders to swing as well. This swinging will cause wear on the seals, which may eventually lead to oil leakage on the upper cover plate of the hydraulic cylinder.

[0004] (2) During the core retrieval process, the wire rope pulled by the small winch will carry mud dripping onto the upper chuck and the piston rod area of ​​the hydraulic cylinder. Solid particles contained in this mud (such as hard quartz and feldspar particles in rock powder) may slide onto the dust cover and sealing oil seal. With the repeated movement of the hydraulic cylinder, these particles will accelerate the wear of the dust cover and sealing oil seal, causing them to be damaged and eventually leading to oil leakage.

[0005] In view of this, this application provides a feed cylinder for a core drilling rig. Utility Model Content

[0006] In view of this, the present invention provides a feed cylinder for a core drilling rig, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0007] To achieve the aforementioned objective, this utility model provides a core drilling rig feed cylinder, comprising a cylinder body and an upper end cover disposed at the front end of the cylinder body. The upper end cover is characterized in that a first flange is disposed at the front end, a second flange is bolted to the front end of the first flange, a first oil seal is disposed between the first flange and the second flange, and a first dust cover is disposed at the front end of the second flange.

[0008] Preferably, the upper end cover is provided with a second dust cover and a second oil seal at its front and rear ends, respectively.

[0009] Preferably, the front end of the second flange is provided with a pre-tightening cavity, and the front end of the pre-tightening cavity is provided with a pressure ring.

[0010] Preferably, the maximum diameter of the pre-tightening cavity is adapted to the maximum diameter of the outer rings of the first dust cover, the second dust cover, the first oil seal, and the second oil seal, and the minimum diameter of the pre-tightening cavity is smaller than the minimum diameter of the inner rings of the first dust cover, the second dust cover, the first oil seal, and the second oil seal.

[0011] Preferably, the front end of the second flange is provided with a ring body, the inner cavity of the ring body is a pre-tightening cavity, and the pressure ring is sleeved outside the front end of the ring body.

[0012] Preferably, a pre-tightening elastic element is provided between the pressure ring and the upper end cover, and the pre-tightening elastic element provides pressure to the pressure ring towards the upper end cover.

[0013] Preferably, the preload elastic element includes a screw, a spring, and a preload nut. One end of the screw is fixed to the surface of the second flange, and the other end of the screw passes through the pressure ring and is connected to the preload nut. The spring is sleeved on the outside of the screw and is located between the pressure ring and the preload nut.

[0014] Compared with the prior art, the present invention has at least the following beneficial effects: The feed cylinder of the core drilling rig described in this application can effectively reduce oil leakage in the feed cylinder of the core drilling rig.

[0015] The feed cylinder of the core drilling rig described in this application can effectively reduce the damage to the smoke cylinder rod and sealing components caused by solid particles in the drilling mud.

[0016] The feed cylinder of the core drilling rig described in this application effectively reduces the use of hydraulic oil, reduces the need to replace oil seal components, and saves costs.

[0017] The feed cylinder of the core drilling rig described in this application effectively reduces the drilling auxiliary time for replacing sealing components, and can indirectly improve construction efficiency.

[0018] The feed cylinder of the core drilling rig described in this application can effectively avoid in-hole accidents such as stuck drill or drill sticking caused during drilling or when replacing sealing components. Attached Figure Description

[0019] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings: Figure 1This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle; Figure 4 This utility model Figure 3 Enlarged view of section B in the middle.

[0020] Reference numerals in the attached drawings: 1-Cylinder body; 2-Upper end cover; 3-First flange; 4-Second flange; 5-First oil seal; 6-First dust cover; 7-Second dust cover; 8-Second oil seal; 9-Preload chamber; 10-Pressure ring; 11-Ring body; 12-Screw; 13-Spring; 14-Preload nut; 15-Oil inlet; 16-Piston rod; 17-Piston; 18-Piston back cap. Detailed Implementation

[0021] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown, this embodiment provides a core drilling rig feed cylinder, including a cylinder body 1 and an upper end cover 2 disposed at the front end of the cylinder body 1. A first flange 3 is disposed at the front end of the upper end cover 2, and a second flange 4 is bolted to the front end of the first flange 3. A first oil seal 5 is disposed between the first flange 3 and the second flange 4, and a first dust cover 6 is disposed at the front end of the second flange 4.

[0023] Specifically, the feed cylinder of the core drilling rig also includes a piston rod 16. The front end of the piston rod 16 passes sequentially through the upper end cover 2, the first flange 3, and the second flange 4, and the first dust cover 6 and the first oil seal 5 are both fitted onto the outside of the piston rod 16. A piston 17 is provided at the rear end of the piston rod 16, and a piston back cap 18 is provided at the rear end of the piston 17, which is fitted onto the piston rod 16. Two oil inlets 15 are provided on one side of the cylinder body 1. The front and rear ends of the upper end cover 2 are respectively provided with a second dust cover 7 and a second oil seal 8. The first flange 3 can be fixed to the frame of the core drilling rig.

[0024] In this embodiment, the cooperation of the first oil seal 5 and the first dust cover 6 can greatly alleviate oil leakage in the feed cylinder of the core drilling rig. When the feed cylinder is working, the first oil seal 5 and the first dust cover 6 provide the first line of protection, effectively reducing wear on the second dust cover 7 and the second oil seal 8. Furthermore, the easy disassembly and assembly of the first flange 3 and the second flange 4 makes replacing the first dust cover 6 and the first oil seal 5 convenient, thus alleviating the inconvenience of directly replacing the second dust cover 7 and the second oil seal 8 on the feed cylinder in the prior art.

[0025] The implementation steps are as follows: (1) After the oil leak occurs on the upper cover 2 of the oil cylinder, first raise the oil cylinder to the top, remove the cap nuts and hexagonal nuts on the upper ends of the two oil cylinders, remove the upper chuck and pressure beam, remove the upper cap, the second dust cover 7 and the second oil seal 8, and take out the piston 17 and piston rod 16.

[0026] (2) Check whether the piston 17 and piston rod 16 are intact, clean them with diesel, replace all oil seals and sealing components on the piston 17 and piston rod 16, and then reinstall them into the cylinder body 1.

[0027] (3) Check whether the cap and sealing components of the oil cylinder are intact and clean them with diesel.

[0028] (4) Weld a custom-made first flange 3 to the upper end of the cap and install the first oil seal 5 of the corresponding specification.

[0029] (5) Find a second flange 4 of the same specifications and corresponding bolts. A step is machined on the inner edge of the second flange 4, and a first dust cover 6 of the corresponding specifications is installed.

[0030] (6) Install the second flange 4 onto the first flange 3 and the top cap, and put it back into the cylinder body 1, and tighten all bolts.

[0031] (7) Reinstall the upper chuck and pressure beam back into the feed cylinder, and tighten the cap nut and hexagonal nut.

[0032] (8) Start the drilling rig and begin drilling. After observing for several days, no more oil leakage occurred. like Figures 2 to 4 As shown, in Embodiment 2, a pre-tightening cavity 9 is provided at the front end of the second flange 4, and a pressure ring 10 is provided at the front end of the pre-tightening cavity 9. The pre-tightening cavity 9 can hold the discarded first dust cover 6, first oil seal 5, second dust cover 7 and second oil seal 8, thereby pre-treating the solid particles in the mud brought back from the surface of the piston rod 16 and reducing the impact of the solid particles in the mud on the feed cylinder.

[0033] The maximum diameter of the pre-tightening cavity 9 is adapted to the maximum diameter of the outer ring of the first dust cover 6, the second dust cover 7, the first oil seal 5, and the second oil seal 8, and the minimum diameter of the pre-tightening cavity 9 is smaller than the minimum diameter of the inner ring of the first dust cover 6, the second dust cover 7, the first oil seal 5, and the second oil seal 8.

[0034] Since the outer and inner ring sizes of the first dust cover 6, the second dust cover 7, the first oil seal 5, and the second oil seal 8 are different, the above arrangement ensures that the first dust cover 6, the second dust cover 7, the first oil seal 5, and the second oil seal 8 can all be effectively confined within the pre-tightening cavity 9.

[0035] In a relatively specific embodiment, the front end of the second flange 4 is provided with a ring body 11, the inner cavity of the ring body 11 is a pre-tightening cavity 9, and a pressure ring 10 is sleeved on the outside of the front end of the ring body 11. A pre-tightening elastic element is provided between the pressure ring 10 and the upper end cover 2, and the pre-tightening elastic element provides pressure to the pressure ring 10 on the side of the upper end cover 2.

[0036] Specifically, the pre-tightening elastic element includes a screw 12, a spring 13, and a pre-tightening nut 14. One end of the screw 12 is fixed to the surface of the second flange 4, and the other end of the screw 12 passes through the pressure ring 10 and is connected to the pre-tightening nut 14. The spring 13 is sleeved on the outside of the screw 12 and is located between the pressure ring 10 and the pre-tightening nut 14.

[0037] By rotating the preload nut 14, the pressure of the preload nut 14 on the spring 13 can be adjusted, thereby adjusting the pressure of the spring 13 on the pressure plate. This allows adjustment of the pressure of the pressure plate on the discarded first dust cover 6, second dust cover 7, first oil seal 5, and second oil seal 8 within the preload chamber 9. Adjusting the pressure controls the deformation of the discarded first dust cover 6, second dust cover 7, first oil seal 5, and second oil seal 8, ensuring they fit better against the surface of the piston rod 16 and improving the pretreatment effect on solid particles in the mud.

[0038] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A feed cylinder for a core drilling rig, comprising a cylinder body (1) and an upper end cap (2) disposed at the front end of the cylinder body (1), characterized in that, The upper end cover (2) is provided with a first flange (3) at the front end, and a second flange (4) is bolted to the front end of the first flange (3). A first oil seal (5) is provided between the first flange (3) and the second flange (4), and a first dust cover (6) is provided at the front end of the second flange (4).

2. The feed cylinder for a core drilling rig as described in claim 1, characterized in that, The upper end cover (2) is provided with a second dust cover (7) and a second oil seal (8) at its front and rear ends respectively.

3. The feed cylinder for a core drilling rig as described in claim 1, characterized in that, The front end of the second flange (4) is provided with a pre-tightening cavity (9), and the front end of the pre-tightening cavity (9) is provided with a pressure ring (10).

4. The feed cylinder for a core drilling rig as described in claim 3, characterized in that, The maximum diameter of the pre-tightening cavity (9) is adapted to the maximum diameter of the outer ring of the first dust cover (6), the second dust cover (7), the first oil seal (5), and the second oil seal (8), and the minimum diameter of the pre-tightening cavity (9) is smaller than the minimum diameter of the inner ring of the first dust cover (6), the second dust cover (7), the first oil seal (5), and the second oil seal (8).

5. The feed cylinder for a core drilling rig as described in claim 3, characterized in that, The front end of the second flange (4) is provided with a ring body (11), the inner cavity of the ring body (11) is a pre-tightening cavity (9), and the pressure ring (10) is sleeved on the outside of the front end of the ring body (11).

6. The feed cylinder for a core drilling rig as described in claim 5, characterized in that, A pre-tightening elastic element is provided between the pressure ring (10) and the upper end cover (2), and the pre-tightening elastic element provides pressure to the pressure ring (10) on the side of the upper end cover (2).

7. The feed cylinder for a core drilling rig as described in claim 6, characterized in that, The pre-tightening elastic element includes a screw (12), a spring (13) and a pre-tightening nut (14). One end of the screw (12) is fixed to the surface of the second flange (4), and the other end of the screw (12) passes through the pressure ring (10) and is connected to the pre-tightening nut (14). The spring (13) is sleeved on the outside of the screw (12) and is located between the pressure ring (10) and the pre-tightening nut (14).

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