Hydraulic support before fracturing

Abstract

The utility model discloses a hydraulic support used before fracturing, which comprises a support plate, a hydraulic support, a hydraulic support and a hydraulic support, and is characterized in that the support plate directly contacts with the inner wall of a mine pit; the hydraulic assembly comprises an oil storage tank, a hydraulic support body and an extension rod, the oil storage tank is used for storing oil, the oil storage tank and the hydraulic support body are connected through an oil conveying assembly, and the extension rod used for driving the supporting plate to move is arranged in the hydraulic support body; fixing springs are compressed through hydraulic pressure, the fixing springs can stretch along with expansion of a mine pit in the fracturing working process, and therefore a supporting plate is attached to the inner wall of the mine pit all the time, the stability of equipment in the using process is improved, meanwhile, the phenomenon of backflow of oil liquid in the supporting process can be avoided through a one-way valve, and the service life of the equipment is prolonged. And the stability of the device during use is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coal mine, especially relates to hydraulic support before fracturing. BACKGROUND

[0002] In the coal mine construction process, need to increase the gas permeability of coal gas layer, thereby make gas flow from the coal seam, and hydraulic fracturing technology is one of the most effective methods of increasing coal seam permeability at present, and needs to use hydraulic support to support the mine pit before fracturing, improve the stability of the mine pit, but the general hydraulic support has some shortcomings when using, for example:

[0003] The general hydraulic support cannot effectively adhere to the inner wall of the mine pit when using along with the fracturing work, thereby being not conducive to the use of equipment. UTILITY MODEL CONTENTS

[0004] The utility model discloses hydraulic support before fracturing, to solve the problem that the hydraulic support cannot adhere to the inner wall of the mine pit when using along with the fracturing work in the background art, thereby improving the supporting effect of equipment.

[0005] To solve the above technical problems, the utility model is realized through the following technical schemes:

[0006] The utility model discloses hydraulic support before fracturing, including:

[0007] Supporting plate, it directly and the inner wall of mine pit contact and support;

[0008] Hydraulic assembly, the hydraulic assembly includes oil storage tank, hydraulic support body and extension rod, and the oil storage tank is used to store oil, and the oil storage tank hydraulic support body is connected through the oil transfer assembly, and the inside of the hydraulic support body is provided with the extension rod for moving the supporting plate.

[0009] Further, it further includes fixed frame, the outside of fixed frame isophase and is provided with 4 hydraulic support bodies and extension rods, the extension rod is connected through self -adaptation adjustment mechanism between the supporting plate, and the oil storage tank is located in the inside of fixed frame.

[0010] Further, the supporting plate is provided with 4, and the outside of supporting plate isophase and is provided with annular limit ring.

[0011] Further, the fixed frame and the oil storage tank are connected through connecting rod.

[0012] Further, the oil delivery assembly is arranged between the oil storage tank and the fixed frame in cross with the connecting rod, the oil delivery assembly comprises an oil pump and a one-way valve, the oil inlet end of the oil pump is connected with the oil storage tank, the oil outlet end of the oil pump is connected with the hydraulic support body, and the oil outlet end of the oil pump is internally provided with the one-way valve.

[0013] Further, the self-adaptive adjusting mechanism comprises a fixed spring and a connecting frame, the fixed spring is arranged in the extension rod, the end of the extension rod away from the hydraulic support body is penetrated by the connecting frame, and the connecting frame and the support plate are fixed by bolts.

[0014] Compared with the prior art, the oil delivery assembly is arranged between the oil storage tank and the fixed frame in cross with the connecting rod, the oil delivery assembly comprises an oil pump and a one-way valve, the oil inlet end of the oil pump is connected with the oil storage tank, the oil outlet end of the oil pump is connected with the hydraulic support body, and the oil outlet end of the oil pump is internally provided with the one-way valve.

[0015] The oil delivery assembly is arranged between the oil storage tank and the fixed frame in cross with the connecting rod, the oil delivery assembly comprises an oil pump and a one-way valve, the oil inlet end of the oil pump is connected with the oil storage tank, the oil outlet end of the oil pump is connected with the hydraulic support body, and the oil outlet end of the oil pump is internally provided with the one-way valve.

[0016] Based on the above beneficial effects, the fixed spring is compressed by using hydraulic pressure, so that during the fracturing operation, as the mine pit expands, the fixed spring is stretched, so that the support plate is always attached to the inner wall of the mine pit, thereby improving the stability of the device during use, and the one-way valve can prevent the oil from flowing back during support, thereby improving the stability of the device during use. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is an overall three-dimensional schematic view of the present application;

[0019] Figure 2 It is an overall front view schematic view of the present application;

[0020] Figure 3 It is an internal schematic view of the fixed frame of the present application;

[0021] Figure 4 It is an internal schematic view of the extension rod of the present application.

[0022] In the drawings, the component list represented by each reference sign is as follows:

[0023] 10, support plate; 11, limiting ring;

[0024] 20, fixed frame; 21, hydraulic support body; 22, extension rod; 23, fixed spring; 24, connecting frame;

[0025] 30, oil tank; 31, connecting rod; 32, oil pump; 33, one-way valve. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the utility model, therefore the utility model is not limited by the specific embodiments disclosed below.

[0028] In order to make the purposes, technical solutions and advantages of the utility model more clear, the embodiments of the utility model will be described in further detail below with reference to the drawings.

[0029] Please refer to Figures 1-4 The embodiment is a hydraulic support before fracturing, which comprises:

[0030] The support plate 10 is directly in contact with the inner wall of the mine for support;

[0031] The hydraulic assembly comprises an oil tank 30, a hydraulic support body 21 and an extension rod 22, the oil tank 30 is used for storing oil, the oil tank 30 and the hydraulic support body 21 are connected through an oil conveying assembly, and the extension rod 22 for driving the support plate 10 to move is arranged in the hydraulic support body 21.

[0032] The fixed frame 20 is further provided, four hydraulic support bodies 21 and extension rods 22 are arranged at equal angles on the outer side of the fixed frame 20, the extension rod 22 and the support plate 10 are connected through an adaptive adjustment mechanism, and the oil tank 30 is located in the interior of the fixed frame 20.

[0033] When the device is in use, the oil in the oil tank 30 is injected into the interior of the hydraulic support body 21, so as to push the extension rod 22 and the support plate 10 to move outward, the hydraulic support is used to support the inner wall of the coal mine, and the phenomenon of local mine collapse during fracturing is avoided.

[0034] The support plate 10 is provided with four support plates 10, and the outer side of the support plate 10 is provided with a ring-shaped limiting ring 11 at equal intervals.

[0035] The limiting ring 11 can improve the friction between the support plate 10 and the mine pit, thereby avoiding movement of the limiting ring 11 during support, and improving the stability of the device during use.

[0036] The fixed frame 20 and the oil storage tank 30 are connected through the connecting rod 31.

[0037] The oil storage tank 30 is connected with the fixed frame 20 through the connecting rod 31, thereby improving the stability of the oil storage tank 30 during use, and avoiding damage to the oil storage tank 30 during use due to protection of the oil storage tank 30 by the fixed frame 20.

[0038] Working principle: when the device is in use, the oil in the oil storage tank 30 is input into the hydraulic support body 21 through the oil feeding assembly, thereby pushing the extension rod 22 and the support plate 10 to move outward, playing a supporting effect, and during support, the limiting ring 11 can improve the friction between the support plate 10 and the mine pit, thereby avoiding sliding of the device during use, and further improving the stability of the device during use.

[0039] Please refer to Figures 1-4 The oil feeding assembly and the connecting rod 31 are cross arranged between the oil storage tank 30 and the fixed frame 20, the oil feeding assembly includes an oil pump 32 and a one-way valve 33, the oil inlet end of the oil pump 32 is connected with the oil storage tank 30, the oil outlet end of the oil pump 32 is connected with the hydraulic support body 21, and the oil outlet end of the oil pump 32 is internally provided with the one-way valve 33.

[0040] The oil in the oil storage tank 30 is input into the hydraulic support body 21 through the oil pump 32, and during normal use of the device for support, the one-way valve 33 can prevent the oil in the hydraulic support body 21 from flowing back into the oil storage tank 30, thereby improving the stability of the device during use.

[0041] The self-adaptive adjusting mechanism includes a fixed spring 23 and a connecting frame 24, the inside of the extension rod 22 is provided with the fixed spring 23, one end of the extension rod 22 away from the hydraulic support body 21 is penetrated by the connecting frame 24, and the connecting frame 24 and the support plate 10 are fixed by bolts.

[0042] When the extension rod 22 moves outward, the fixed spring 23 is extruded, and the connecting frame 24 is pushed to move outward for support, when the device is fractured, the mine pit will have a tendency to expand due to increased pressure, at this time the fixed spring 23 pushes the connecting frame 24 and the support plate 10 to move outward, so that the support plate 10 can still effectively support.

[0043] Working principle, oil pump 32 can input the oil in the oil tank 30 to the inside of hydraulic support body 21, thereby carrying out normal support work, and one-way valve 33 improves the stability of support, avoids the phenomenon that oil appears backflow;

[0044] And the fixed spring 23 can fine-tune the position of the connecting frame 24, so that the equipment in the fracturing, support plate 10 will always and mine pit wall together, improve the stability of the equipment in use.

[0045] In the description of the present application, it should be pointed out that, unless otherwise explicitly provided and limited, the terms "set", "install", "connect", "connect" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] Finally, it should be pointed out that: the above is only the preferred embodiment of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical scheme recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic support before fracturing, characterized in that, include: The support plate (10) is in direct contact with the inner wall of the mine pit for support; The hydraulic assembly includes an oil storage tank (30), a hydraulic support body (21), and an extension rod (22). The oil storage tank (30) is used to store oil. The oil storage tank (30) and the hydraulic support body (21) are connected by an oil delivery assembly. The hydraulic support body (21) is provided with an extension rod (22) inside for moving the support plate (10).

2. The hydraulic support before fracturing according to claim 1, characterized in that, It also includes a fixed frame (20), on which four hydraulic support bodies (21) and extension rods (22) are provided at equal angles on the outside of the fixed frame (20). The extension rods (22) are connected to the support plate (10) through an adaptive adjustment mechanism. The oil storage tank (30) is located inside the fixed frame (20).

3. The hydraulic support before fracturing according to claim 1, characterized in that, The support plate (10) is provided in four parts, and the outer side of the support plate (10) is provided with a ring-shaped limiting ring (11) at equal intervals.

4. The hydraulic support before fracturing according to claim 2, characterized in that, The fixed frame (20) and the oil storage tank (30) are connected by a connecting rod (31).

5. The hydraulic support before fracturing according to claim 4, characterized in that, The oil delivery assembly and the connecting rod (31) are arranged crosswise between the oil storage tank (30) and the fixed frame (20). The oil delivery assembly includes an oil pump (32) and a one-way valve (33). The oil inlet end of the oil pump (32) is connected to the oil storage tank (30), and the oil outlet end of the oil pump (32) is connected to the hydraulic support body (21). The one-way valve (33) is provided inside the oil outlet end of the oil pump (32).

6. The hydraulic support before fracturing according to claim 5, characterized in that, The adaptive adjustment mechanism includes a fixed spring (23) and a connecting frame (24). The fixed spring (23) is provided inside the extension rod (22). The end of the extension rod (22) away from the hydraulic support body (21) is penetrated by the connecting frame (24). The connecting frame (24) and the support plate (10) are fixed together by bolts.

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