Quick connecting device of coal mine hydraulic device

Abstract

The utility model provides a quick connecting device of a coal mine hydraulic device. The quick connecting device comprises a base; a socket; a base connector; the base connector comprises an embedding part; a projection; performing C-shaped chamfering; the tail end of the stand column is placed in the column nest; the stand column comprises a mounting hole; coaxially arranged stand column connectors are arranged in the mounting holes. The stand column connector comprises a baffle and a connecting part arranged on the base connector, and the connecting part comprises a containing cavity; a first spring; a lug support; a connecting hook; the connecting hook comprises a mounting part; a guide part; and a hook part. The elastic hook assemblies arranged in an annular array are arranged between the base and the stand column connector, the C-shaped chamfer guide structure at the end of the stand column and the annular baffle of the base are matched, the wedge-shaped self-locking effect during axial propelling is achieved, and the whole connecting process is easy to operate, rapid and convenient. The technical defects that in the prior art, the assembling efficiency is low and the locking reliability is poor when a base and a stand column are connected in coal mine hydraulic equipment are overcome.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic supports, and in particular to a quick connection device for a coal mine hydraulic system. Background Technology

[0002] Hydraulic supports in coal mines are the core support equipment for fully mechanized coal mining faces. They integrate load-bearing structural components, actuators, control components, auxiliary devices, and hydraulic systems. By controlling the extension and retraction of the columns and jacks through hydraulic power, the supports can be raised, lowered, moved, and used for support. This adapts to changes in roof pressure, prevents roof collapse accidents, ensures the safety of personnel and equipment, and improves coal mining efficiency.

[0003] In existing technologies, before a coal mine hydraulic support is put into use, the coal mine hydraulic device needs to be assembled and debugged to ensure its reliability. However, underground coal mines pose risks of gas and dust explosions and have confined spaces. Traditional bolt-tightening connection methods have hidden dangers such as connection failure and operational safety risks. Vibration or impact can cause bolts to loosen, leading to support collapse. Furthermore, manually tightening bolts requires prolonged exposure to dangerous areas, necessitates tightening tools, and has low assembly efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the technical defects of low assembly efficiency and poor locking reliability in the connection between the base and column of the existing coal mine hydraulic equipment.

[0005] To achieve the above objectives, this application proposes a quick-connect device for a coal mine hydraulic system, comprising:

[0006] A base, a recess connected to the bottom surface of the base; a base connector installed in the recess; the base connector includes: an embedded part that is embedded in the recess; a protruding part that is slidably connected to the embedded part and protrudes from the recess; and a C-shaped chamfer provided at the end of the protruding part;

[0007] A column is inserted into the column socket at its end. The column includes: a mounting hole provided at the end of the column; a column connector arranged coaxially in the mounting hole; the column connector includes: a baffle arranged in a ring shape at the end of the column connector and protruding from the side wall surface.

[0008] The connecting portion disposed on the base connector includes: a receiving cavity disposed between the embedded portion and the protruding portion; a first spring arranged in a circumferential array in the receiving cavity to connect the end face of the embedded portion and the end face of the mounting hole; an ear-type support arranged in a circumferential array on the side wall of the protruding portion; and a connecting hook hinged to the ear-type support.

[0009] The connecting hook includes: a mounting portion hinged to the lug support; a guide portion disposed at the bottom of the mounting portion and overlapping the C-shaped chamfer; and a hook portion disposed at the top of the mounting portion and protruding from the end face of the protrusion.

[0010] The self-locking quick-connect device for coal mine hydraulic supports proposed in this application achieves a wedge-shaped self-locking effect during axial advancement by setting an elastic hook assembly in a ring array between the base and the column connector, in conjunction with the C-shaped chamfered guide structure at the end of the column and the annular baffle on the base: during initial connection, the hook part elastically opens to form a pre-position; as advancement continues, the C-shaped chamfered inclined surface drives the hook part to generate lever movement, ultimately locking the mechanical baffle. The entire connection process is simple, quick, and convenient. This solves the technical defects of low assembly efficiency and poor locking reliability in the connection between the base and column in existing coal mine hydraulic equipment.

[0011] Furthermore, in order to facilitate the positioning and installation of the embedded part and the protruding part, the top surface of the embedded part is provided with a first positioning hole distributed along the axial direction; the bottom surface of the protruding part is provided with a first positioning pin that cooperates with the first positioning hole.

[0012] Furthermore, to facilitate the installation of the first locating pin and the first locating hole, the end of the first locating pin is tapered.

[0013] Furthermore, to prevent interference between the first positioning pin and the first positioning hole, the depth of the first positioning hole is greater than the length of the first positioning pin.

[0014] Furthermore, the first positioning pin is always embedded in the first positioning hole.

[0015] Furthermore, to facilitate the positioning and installation of the column connector and the base connector, a second positioning hole is provided at the bottom of the mounting hole, arranged coaxially; and a second positioning pin is provided at the end of the column connector to cooperate with the second positioning hole.

[0016] Furthermore, to prevent interference between the second locating pin and the second locating hole, the depth of the second locating hole is greater than the length of the second locating pin.

[0017] Furthermore, to enhance the wear resistance of the column connector and the base connector, the surfaces of the first positioning hole, the first positioning pin, the second positioning hole, and the second positioning pin are all coated with a wear-resistant coating.

[0018] Furthermore, in order to facilitate the automatic reset of the hook and achieve automatic unlocking, a second spring is provided between the connecting hook and the ear-type support.

[0019] Furthermore, in order to achieve automatic reset between the hook and the protrusion and the embedded part, the first spring and the second spring are always in a compressed state.

[0020] The beneficial effects of this application are as follows:

[0021] 1. The self-locking quick-connect device for coal mine hydraulic supports proposed in this application achieves a wedge-shaped self-locking effect during axial advancement by setting an elastic hook assembly in a ring array between the base and the column connector, in conjunction with the C-shaped chamfered guide structure at the end of the column and the annular baffle on the base: during initial connection, the hook part elastically opens to form a pre-position; as advancement continues, the C-shaped chamfered slope drives the hook part to generate lever movement, ultimately engaging the mechanically clamping baffle. The entire connection process is simple, quick, and convenient. It solves the technical defects of low assembly efficiency and poor locking reliability in the connection between the base and column in existing coal mine hydraulic equipment.

[0022] 2. This application reduces the positioning difficulty of each component during installation by setting a first positioning hole, a first positioning pin, a second positioning hole, and a second positioning pin.

[0023] 3. When there is axial displacement between the embedded part and the protruding part of this application, the operator can sense a sudden increase in propulsion resistance, forming a clear tactile feedback to determine whether the locking between the base and the column has been achieved, thus solving the technical problem of fast and reliable connection of hydraulic equipment in the narrow space of underground coal mines.

[0024] 4. The first and second springs provided in this application can achieve automatic unlocking through the automatic reset between the hook and the protrusion and the embedded part. They can automatically unlock when the column and the base are disassembled, which is convenient and quick. At the same time, when facing impact and vibration, the energy is distributed to the first and second springs to avoid hook failure.

[0025] 5. The receiving cavity of this application is located between the protrusion and the embedded part, blocking the path of coal dust intrusion and ensuring the stability of the relative sliding of the protrusion and the embedded part, thereby improving the reliability of locking in the complex environment of underground coal mines. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural schematic diagram of a quick-connect device for a coal mine hydraulic system, which hides a portion of the base in an embodiment of this application.

[0028] Figure 2 This is a cross-sectional view of a quick-connect device for a coal mine hydraulic system according to an embodiment of this application;

[0029] Figure 3 for Figure 2 Enlarged view of point a in the middle;

[0030] Figure 4 This is a schematic diagram of the installation of the connecting hook in an embodiment of this application.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Base; 11. Column socket; 12. Base connector; 121. Embedded part; 122. Protrusion; 123. First positioning hole; 124. First positioning pin; 13. C-shaped chamfer;

[0033] 2. Column; 21. Mounting hole; 22. Column connector; 221. Baffle; 23. Second positioning hole; 24. Second positioning pin;

[0034] 3. Connecting part; 31. Receiving cavity; 32. First spring; 33. Ear support; 34. Connecting hook; 341. Mounting part; 342. Guide part; 343. Hook part; 35. Second spring. Detailed Implementation

[0035] The following will be combined with the appendix Figures 1-4 The embodiments of the technical solutions of this application are described in detail below. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0036] Example 1

[0037] like Figures 1-4 This illustration shows a quick connection device for a coal mine hydraulic system. In order to achieve quick self-locking connection, this device achieves tool-free quick self-locking by matching the geometric structure of the base connector 12 and the column connector 22.

[0038] A quick-connect device for a coal mine hydraulic system includes:

[0039] A base 1, a recess 11 connected to the bottom surface of the base 1; a base connector 12 installed in the recess 11; the base connector 12 includes: an embedded part 121 embedded in the recess 11; a protruding part 122 slidably connected to the embedded part 121 and protruding out of the recess 11; and a C-shaped chamfer 13 provided at the end of the protruding part 122;

[0040] The column 2 is inserted into the column socket 11 at its end. The column 2 includes: a mounting hole 21 provided at the end of the column 2; a column connector 22 arranged coaxially in the mounting hole 21; the column connector 22 includes: a baffle 221 arranged in a ring shape at the end of the column connector 22 and protruding from the side wall surface.

[0041] The connecting portion 3 is provided on the base connector 12, and the connecting portion 3 includes: a receiving cavity 31 provided between the embedded portion 121 and the protrusion 122; a first spring 32 arranged in a surrounding array in the receiving cavity 31 to connect the end face of the embedded portion 121 and the end face of the mounting hole 21; an ear-type support 33 arranged in a surrounding array on the side wall of the protrusion 122; and a connecting hook 34 hinged to the ear-type support 33.

[0042] The connecting hook 34 includes: a mounting portion 341 hinged to the lug support 33; a guide portion 342 disposed at the bottom of the mounting portion 341 and overlapping the C-shaped chamfer 13; and a hook portion 343 disposed at the top of the mounting portion 341 and protruding from the end face of the protrusion 122.

[0043] Specifically, a base connector 12 is installed in the recess 11 on the bottom surface of the base 1. When the end of the column 2 is inserted into the recess 11 of the base 1, the C-shaped chamfer 13 at the end of the protrusion 122 first contacts the guide portion 342 of the connecting hook 34. The beveled design of the C-shaped chamfer 13 makes the initial contact point located outside the hinge axis of the connecting hook 34, thereby generating a lever effect with the mounting portion 341 as the fulcrum: as the column 2 is axially advanced, the bevel gradually decomposes the vertical thrust into a radial component, driving the hook portion 343 to elastically open outward around the ear-type support 33. During this process, the first spring 32 in the receiving cavity 31 is compressed, storing elastic potential energy, while providing a continuous axial preload to the protrusion 122, ensuring that the C-shaped chamfer 13 and the connecting hook 34 always maintain contact pressure.

[0044] When advanced to the critical position, the wedge-shaped surface of the C-shaped chamfer 13 completely fits against the curved surface of the hook portion 343. At this point, the normal reaction force of the wedge-shaped surface is amplified by the leverage ratio, driving the hook portion 343 to contract inward, ultimately engaging the annular baffle 221 at the end of the column connector 22. The annular structure of the baffle 221 and the array distribution of multiple connecting hooks 34 form a multi-point mechanical clamping, distributing the axial load to multiple contact points and improving the structural load-bearing capacity.

[0045] Example 2

[0046] like Figures 1-4 This invention illustrates a quick connection device for a coal mine hydraulic system. In order to achieve a dual positioning structure, especially in the face of the docking problem under complex working conditions in coal mines, this device adopts a dual positioning mechanism of axial and radial.

[0047] The top surface of the embedded part 121 is provided with a first positioning hole 123 distributed along the axial direction; the bottom surface of the protruding part 122 is provided with a first positioning pin 124 that cooperates with the first positioning hole 123.

[0048] The end of the first locating pin 124 is tapered.

[0049] The depth of the first positioning hole 123 is greater than the length of the first positioning pin 124.

[0050] The first positioning pin 124 is always embedded in the first positioning hole 123.

[0051] The bottom of the mounting hole 21 is provided with a second positioning hole 23 arranged coaxially; the end of the column connector 22 is provided with a second positioning pin 24 that cooperates with the second positioning hole 23.

[0052] The depth of the second positioning hole 23 is greater than the length of the second positioning pin 24.

[0053] The top surface of the insert portion 121 of the base connector 12 is provided with first positioning holes 123 distributed axially, and the bottom surface of the protrusion 122 is correspondingly provided with a conical first positioning pin 124. The conical design enables the positioning pin to have an automatic centering function during insertion. Even if there is an axial deviation in the initial docking, the conical surface can still achieve precise positioning through slight sliding. The depth of the first positioning hole 123 is greater than the length of the positioning pin, ensuring that the positioning pin is always embedded in the hole under vibration conditions, avoiding positioning failure caused by complete disengagement.

[0054] The second positioning pin 24 at the end of the column connector 22 and the second positioning hole 23 at the bottom of the mounting hole 21 constitute a two-stage positioning system. The second positioning pin 24 adopts a cylindrical design, and the clearance tolerance between it and the second positioning hole 23 is controlled within 0.05mm to ensure the coaxiality of the column 2 and the base 1. When the downhole equipment vibrates due to geological movement, the radial floating compensation function of the first spring 32 can absorb part of the offset, and the elastic deformation of the spring maintains the engagement state between the connecting hook 34 and the baffle 221.

[0055] The synergistic effect of the dual positioning structure is reflected in the following aspects: axial positioning achieves rapid coarse positioning through tapered pin-hole fit, radial positioning ensures high-precision centering through cylindrical pin-hole fit, and the spring system provides dynamic compensation.

[0056] Example 3

[0057] like Figures 1-4This illustration depicts a quick-connect device for a coal mine hydraulic system. To achieve automatic reset and buffering mechanisms, the first spring 32 within the receiving cavity 31 is always compressed, providing a continuous axial reset force to the protrusion 122. A second spring 35 is provided between the connecting hook portion 343 and the lug support 33, and both the first spring 32 and the second spring 35 are always compressed.

[0058] When the column 2 is subjected to tension, the preload of the first spring 32 can offset part of the tensile stress, preventing the connecting hook 34 from failing due to excessive tension. At the same time, the stiffness design of the first spring 32 must meet two conditions: it must ensure sufficient restoring force to maintain the self-locking state, and it must avoid excessive stiffness that would lead to an increase in operating torque.

[0059] The second spring 35, connecting the hook 34 and the lug support 33, provides radial restoring force. During disassembly, when the column 2 is pulled outward, the first spring 32 pushes the protrusion 122 back, and the contact point between the C-shaped chamfer 13 and the hook 343 gradually moves to the inside of the hinge axis, generating a reverse lever effect that drives the hook 343 to open. At the same time, the elastic potential energy of the second spring 35 is released, accelerating the hook 343 to disengage from the baffle 221, achieving single-step unlocking.

[0060] Meanwhile, the dual-spring system also has an energy absorption function. During the operation of the hydraulic support, the column 2 is frequently subjected to pressure fluctuations from the top plate, and fatigue damage is likely to occur at the connection points. The series arrangement of the first spring 32 and the second spring 35 can form a two-stage buffer system, dispersing the impact energy to the two elastic elements.

[0061] Example 4

[0062] like Figures 1-4 This illustration shows a quick-connect device for a coal mine hydraulic system. In order to achieve wear-resistant and anti-loosening design, that is, to cope with the challenges of dust erosion and frequent insertion and removal in underground coal mines, the surfaces of the first positioning hole 123, the first positioning pin 124, the second positioning hole 23 and the second positioning pin 24 are all coated with a tungsten carbide wear-resistant coating. This coating can reduce the wear of the positioning components.

[0063] The anti-loosening mechanism of the connecting hook 34 is achieved by the combined effect of spring preload and wedge-shaped force amplification. The axial preload of the first spring 32 is transmitted to the C-shaped chamfer 13 through the protrusion 122, ensuring that the hook part 343 always maintains positive pressure on the baffle 221. At the same time, the wedge-shaped design of the C-shaped chamfer 13 makes the hook part 343 more engaging with the greater the axial load, forming a self-compensating effect.

[0064] Example 5

[0065] like Figures 1-4This illustration depicts a quick-connect device for a coal mine hydraulic system. To achieve dust prevention and operational feedback functions, a receiving cavity 31 is positioned between the protrusion 122 and the embedded portion 121, blocking the path of coal dust intrusion. The axial preload of the first spring 32 further compresses the sealing gap, making it difficult for dust particles to accumulate on the connection surface. When the column 2 is advanced to the locked position, the axial gap between the end face of the hook portion 343 of the connecting hook 34 and the baffle 221 is eliminated, triggering operational feedback: the operator can perceive a sudden increase in pushing resistance, forming a clear tactile feedback.

[0066] This feedback mechanism allows downhole workers to confirm the connection status without visual inspection. It also improves safety compared to traditional connection methods in dusty environments with visibility below 0.5 meters.

[0067] The connection operation involves the following stages:

[0068] 1. Pre-connection stage: The base connector and the column connector make initial contact, and the hook part of the connecting hook naturally opens under the action of elastic force, forming a pre-positioned state of the annular surrounding baffle;

[0069] 2. Axial Advancement Stage: As the column connector continues to advance axially, the C-shaped chamfered surface contacts the hook portion, creating a wedge effect;

[0070] 3. Self-locking formation stage: During the sliding process of the hook part along the inclined plane, lever motion is generated with the mounting part as the fulcrum, and its free end retracts towards the axis and finally gets stuck in the annular groove of the baffle.

[0071] 4. Final locking: When the designed stroke is reached, the hook and the baffle form an engagement angle of more than 120°, achieving mechanical self-locking.

[0072] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0073] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quick connect device for a coal mine hydraulic device, characterised in that, The utility model relates to a base (1) is connected the column socket (11) of bottom surface of base (1), the base connector (12) of installation in column socket (11), the base connector (12) includes: the embedding part (121) of embedding in column socket (11), the convex part (122) of sliding connection with embedding part (121) and convex column socket (11), C-shaped chamfer (13) is arranged at the end of convex part (122), the column (2) of end putting into column socket (11), the column (2) includes: the mounting hole (21) of setting at the end of column (2), the coaxial arrangement of setting in mounting hole (21) is connected with the column (22), the column connector (22) includes: the baffle (221) of annular arrangement at the end of column connector (22) and convex side wall surface, the connecting part (3) of setting on base connector (12), the connecting part (3) includes: the accommodation cavity (31) of setting between embedding part (121) and convex part (122), the first spring (32) of connecting the end face of embedding part (121) and the end face of mounting hole (21) is arranged in the surrounding array of accommodation cavity (31), the ear support (33) of surrounding array distribution on the side wall of convex part (122), the connecting hook (34) of hinging with ear support (33), the connecting hook (34) includes: the mounting part (341) of hinging with ear support (33), the guide part (342) of setting at the bottom of mounting part (341) and the lap joint of C-shaped chamfer (13), the hook part (343) of setting at the top of mounting part (341) and protruding the end face of convex part (122). The top surface of embedding part (121) is provided with an axially distributed first positioning hole (123); the bottom surface of convex part (122) is provided with a first positioning pin (124) matched with the first positioning hole (123). The end of first positioning pin (124) is tapered. The hole depth of first positioning hole (123) is greater than the length of first positioning pin (124). First positioning pin (124) is always embedded in first positioning hole (123). The bottom of mounting hole (21) is provided with a coaxially arranged second positioning hole (23); the end of column connector (22) is provided with a second positioning pin (24) matched with the second positioning hole (23).

2. A quick connect device for a coal mine hydraulic device according to claim 1, characterised in that, The hole depth of second positioning hole (23) is greater than the length of second positioning pin (24).

3. A quick connect device for a coal mine hydraulic device according to claim 2, characterised in that, The surfaces of first positioning hole (123), first positioning pin (124), second positioning hole (23) and second positioning pin (24) are coated with a wear-resistant coating.

4. The quick connect device for coal mine hydraulic devices of claim 2, wherein, A second spring (35) is arranged between connecting hook part (343) and ear support (33).

5. A quick connect device for a coal mine hydraulic device according to claim 4, characterised in that, First spring (32) and second spring (35) are always in a compressed state.

6. The quick connect device for coal mine hydraulic devices of claim 2, wherein, ​ 7. A quick connect device for a coal mine hydraulic device according to claim 6, characterised in that, ​ 8. The quick connect device for a coal mine hydraulic device of claim 6, wherein, ​ 9. The quick connect device for coal mine hydraulic devices of claim 1, wherein, ​ 10. A quick connect device for a coal mine hydraulic device according to claim 9, characterised in that, ​

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