Follow-up coal caving device and top coal caving hydraulic support

Abstract

The invention provides a follow-up coal caving device and a top coal caving hydraulic support. The follow-up coal caving device comprises a caving shield, and the top face of the caving shield is a plane; the tail beam is located on one side of the shield beam in the first direction, one end of the tail beam is hinged to the shield beam, and the rotating axial direction of the tail beam is the second direction; the driving jack is connected with the tail beam, and the driving jack can drive the tail beam to rotate relative to the shield beam; the follow-up telescopic rod comprises an outer cylinder and an inner rod, the inner rod is arranged in the outer cylinder in a sliding mode in the length direction of the follow-up telescopic rod, the outer cylinder is hinged to the shield beam, the inner rod is hinged to the tail beam, and the rotating axial direction of the outer cylinder and the rotating axial direction of the inner rod are the second direction; and the stroke measuring device is used for monitoring the rotating position of the tail beam relative to the shield beam. Therefore, the follow-up coal caving device has the advantage that the rotation position of the tail beam can be conveniently monitored and controlled.

Description

Technical Field

[0001] The invention relates to the technical field of mining, and in particular to a follow-up coal caving device and a hydraulic support for top coal caving. Background Art

[0002] The coal discharge mechanism is generally composed of a tail beam and a plug plate. The tail beam is hinged to the rear of the shield beam, and the size of the coal discharge port is controlled by controlling the swing angle of the tail beam. To realize the intelligent coal discharge process, it is necessary to accurately control the size of the coal discharge port, install a stroke sensor in the tail beam jack, and realize the precise control of the posture of the coal discharge mechanism through the stroke of the tail beam jack. Since it is necessary to reserve installation space for the stroke sensor connector in the jack, the fixed section of the jack of the same specification will increase by about 100mm, which increases the minimum length of the jack when it is retracted, affects the swing amount of the tail beam, and greatly affects the opening of the coal discharge port. In addition, the jack with the stroke sensor installed should have an installation process hole at the rear of the cylinder body, and the cylinder body is generally a double-ear structure. The double ears are generally located at the edge of the bar, the thickness of the ear plate is uneven, the strength cannot be guaranteed, and the reliability is not high. In addition, the tail beam structure determines that the tail beam jack is generally arranged in a narrow space, which is not convenient for the partitioned arrangement of cables and liquid pipes; large pieces of coal and gangue scattered on the conveyor under the tail beam also pose a safety hazard to the cables. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiments of the present invention provide a follow-up coal caving device and a hydraulic support for top coal caving.

[0004] The follow-up coal placing device according to the embodiment of the present invention comprises:

[0005] A shielding beam, wherein the top surface of the shielding beam is a plane;

[0006] a tail beam, the tail beam being located at one side of the shield beam in the first direction, one end of the tail beam being hinged to the shield beam, the rotation axis of the tail beam being in the second direction, any two of the first direction, the second direction and the up-down direction being perpendicular to each other, and an insert plate being provided at one end of the tail beam facing away from the shield beam in the first direction;

[0007] A driving jack, wherein the driving jack is connected to the tail beam, and the driving jack can drive the tail beam to rotate relative to the shield beam;

[0008] A follow-up telescopic rod, the telescopic rod comprising an outer cylinder and an inner rod, the inner rod being slidably arranged in the outer cylinder along the length direction of the follow-up telescopic rod, the outer cylinder being hinged to the shield beam, the inner rod being hinged to the tail beam, and the rotation axis of the outer cylinder and the inner rod being the second direction;

[0009] A stroke measuring device is used to monitor the rotational position of the tail beam relative to the shield beam.

[0010] Therefore, the follow-up coal placing device according to the embodiment of the present invention has the advantage of being convenient for monitoring and controlling the rotation position of the tail beam.

[0011] In some embodiments, the stroke measuring device includes a stroke sensor, which is disposed in the follower telescopic rod and is used to monitor the telescopic dimension of the inner rod relative to the outer cylinder.

[0012] In some embodiments, the first end of the outer cylinder is hinged to the shield beam, and the travel sensor is disposed in the outer cylinder and adjacent to the first end of the outer cylinder.

[0013] In some embodiments, the inner rod is provided with an inner rod hole at the first end portion facing the outer cylinder, and a portion of the stroke sensor extends into the inner rod hole, or the inner rod is a solid rod, and the stroke sensor is connected to one end of the inner rod facing the first end portion of the outer cylinder through a connecting member;

[0014] The first end of the outer cylinder is provided with a plug, the plug and the outer cylinder define a mounting cavity, the outer side of the outer cylinder is provided with a mounting shell, the cavity of the mounting shell, the mounting cavity and the cavity of the outer cylinder accommodating the inner rod are sequentially connected;

[0015] The stroke measuring device comprises a cable connector, a cable connector socket, a stroke sensor socket and the stroke sensor which are connected in sequence. The cable connector socket, the stroke sensor socket and the stroke sensor are located in the installation cavity, and a part of the cable connector is arranged in the installation shell.

[0016] In some embodiments, there are two follow-up telescopic rods, which are spaced apart in the second direction, and each follow-up telescopic rod cooperates with one of the stroke measuring devices.

[0017] In some embodiments, there are two driving jacks, and the two driving jacks are located between the two follower telescopic rods in the second direction. The fixed part of the driving jack is hinged to the shield beam, and the telescopic part of the driving jack is hinged to the tail beam.

[0018] In some embodiments, the hinge between the follower telescopic rod and the shield beam is located above the hinge between the fixed part of the driving jack and the shield beam, and the hinge between the follower telescopic rod and the tail beam is located between the hinge between the tail beam and the shield beam and the hinge between the driving jack and the shield beam.

[0019] In some embodiments, the first end of the outer cylinder is hinged to the shield beam through two connecting ears, and the plug and the stroke sensor are located between the two connecting ears.

[0020] In some embodiments, when no coal is placed at the rear of the hydraulic support, the top surface of the tail beam and the top surface of the shield beam are at the same horizontal plane;

[0021] When coal is placed at the rear of the hydraulic support, the telescopic part of the driving jack is contracted so that the tail beam rotates downward, and the travel sensor monitors the extension dimension of the inner rod relative to the outer cylinder as L1. After the value of L1 reaches a preset value, the telescopic part of the driving jack stops contracting so as to control the downward rotation position of the tail beam;

[0022] When an arch is formed during the falling process of the top coal, the telescopic part of the driving jack extends outward to allow the tail beam to rotate upward. The stroke sensor monitors the telescopic dimension of the inner rod relative to the outer cylinder as L2. After the value of L2 reaches a preset value, the telescopic part of the driving jack stops extending outward to control the upward rotation position of the tail beam.

[0023] The present invention also provides a top coal caving hydraulic support, comprising the above-mentioned follow-up coal caving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of a follow-up coal placing device according to an embodiment of the present invention.

[0025] Figure 2 2. It is a bottom view of a follow-up coal placing device according to an embodiment of the present invention.

[0026] Figure 3 Schematic diagram of a tail beam according to an embodiment of the present invention.

[0027] Figure numerals: 1. shield beam, 2. tail beam, 3. plug plate, 4. follow-up telescopic rod, 5. driving jack, 41. stroke sensor, 42. stroke sensor socket, 43. cable connector, 44. cable connector socket, 45. plug, 46. installation cavity, 47. connecting ear, 48. outer cylinder, 49. inner rod. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] The following describes the follow-up coal placing device according to the embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 3As shown, the follow-up coal placing device according to the embodiment of the present invention includes a shield beam 1, a tail beam 2, a driving jack 5, a follow-up telescopic rod 4 and a stroke measuring device.

[0030] The top surface of the shielding beam 1 is a plane. The tail beam 2 is located on one side of the shielding beam 1 in the first direction, one end of the tail beam 2 is hinged to the shielding beam 1, the rotation axis of the tail beam 2 is the second direction, any two of the first direction, the second direction and the up and down directions are perpendicular to each other, and a plug plate 3 is provided at one end of the tail beam 2 facing away from the shielding beam 1 in the first direction. The driving jack 5 is connected to the tail beam 2, and the driving jack 5 can drive the tail beam 2 to rotate relative to the shielding beam 1. For example, the first direction is the left-right direction, the second direction is the front-back direction, the left end of the tail beam 2 is hinged to the shielding beam 1, the right end of the tail beam 2 is provided with a plug plate 3, and the rotation axis of the tail beam 2 is the front-back direction.

[0031] The telescopic rod includes an outer cylinder 48 and an inner rod 49. The inner rod 49 is slidably arranged in the outer cylinder 48 along the length direction of the follower telescopic rod 4. The outer cylinder 48 is hinged to the shield beam 1, and the inner rod 49 is hinged to the tail beam 2. The rotation axis of the outer cylinder 48 and the inner rod 49 is the second direction. Therefore, when the driving jack 5 is extended and retracted to drive the tail beam 2 to rotate relative to the shield beam 1, the inner rod 49 can be extended and retracted in the outer cylinder 48, so that the tail beam 2 can be more stable when rotating. For example, the rotation axis of the outer cylinder 48 and the inner rod 49 is the front-back direction.

[0032] The stroke measuring device is used to monitor the rotational position of the tail beam 2 relative to the shield beam 1, so that the rotational position of the tail beam 2 relative to the shield beam 1 can be monitored by the stroke measuring device, so as to control the rotational position of the tail beam 2.

[0033] like Figure 3 As shown, in some embodiments, the stroke measuring device includes a stroke sensor 41, which is disposed in the follow-up telescopic rod 4, and the stroke sensor 41 is used to monitor the extension and contraction size of the inner rod 49 relative to the outer cylinder 48. Specifically, the first end of the outer cylinder 48 is hinged to the shield beam 1, and the stroke sensor 41 is disposed in the outer cylinder 48 and adjacent to the first end of the outer cylinder 48. The stroke sensor 41 is a device for measuring the linear displacement or movement distance of an object, and the stroke sensor 41 can monitor the movement distance of the inner rod 49, thereby monitoring the extension and contraction size of the inner rod 49 relative to the outer cylinder 48, so as to determine the rotation position (rotation angle) of the tail beam 2 according to the extension and contraction size of the inner rod 49 relative to the outer cylinder 48.

[0034] In some embodiments, an inner rod hole is opened at the first end of the inner rod 49 toward the outer cylinder 48, and the opening of the inner rod hole faces the first end of the outer cylinder 48. The stroke sensor 41 is a magnetic telescopic sensor. The inner rod 49 and the outer cylinder 48 are metal rods. A portion of the stroke sensor 41 extends into the inner rod hole. When the inner rod 49 moves telescopically, the stroke sensor 41 senses the change in the signal so as to measure the moving distance of the inner rod 49.

[0035] In some embodiments, the inner rod 49 is a solid rod, and the stroke sensor 41 is a pull rope sensor, which is connected to one end of the inner rod 49 toward the first end of the outer cylinder 48 through a connecting member (pull rope). When the inner rod 49 moves in a telescopic manner, the stroke sensor 41 senses the change in the length of the connecting member (pull rope) to measure the moving distance of the inner rod 49.

[0036] like Figure 3 As shown, in some embodiments, a plug 45 is provided at the first end of the outer cylinder 48, and the plug 45 and the outer cylinder 48 define a mounting cavity 46. A mounting shell is provided on the outside of the outer cylinder 48, and the cavity of the mounting shell, the mounting cavity 46 and the cavity of the outer cylinder 48 accommodating the inner rod 49 are connected in sequence.

[0037] The stroke measuring device includes a cable connector 43, a cable connector socket 44, a stroke sensor socket 42 and a stroke sensor 41 which are connected in sequence. The cable connector socket 44, the stroke sensor socket 42 and the stroke sensor 41 are located in the installation cavity 46, so that the stroke sensor 41 (the probe) can be directed toward the inner rod 49 in the length direction of the follow-up telescopic rod 4. A part of the cable connector 43 is arranged in the installation shell so that the cable connector 43, the cable connector socket 44, the stroke sensor socket 42 and the stroke sensor 41 of the stroke measuring device can be electrically connected, so as to facilitate the power supply for the stroke sensor 41 and facilitate the travel sensor 41 to transmit data to the outside.

[0038] In some embodiments, the first end of the outer cylinder 48 is hinged to the shield beam 1 through two connecting ears 47, and the plug 45 and the travel sensor 41 are located between the two connecting ears 47. The two connecting ears 47 can make the connection between the outer cylinder 48 and the shield beam 1 stable.

[0039] like Figure 2 As shown, in some embodiments, there are two follower telescopic rods 4, which are spaced apart in the second direction, and each follower telescopic rod 4 is matched with a stroke measuring device. Thus, the stability of the tail beam 2 can be improved, and the monitoring accuracy of the stroke measuring device can be improved.

[0040] like Figure 2 As shown, in some embodiments, there are two driving jacks 5, and the two driving jacks 5 are located between the two follower telescopic rods 4 in the second direction. The fixed part of the driving jack 5 is hinged to the shielding beam 1, and the telescopic part of the driving jack 5 is hinged to the tail beam 2, so that the telescopic part of the driving jack 5 can drive the tail beam 2 to rotate.

[0041] like Figure 1As shown, in some embodiments, the hinge of the follow-up telescopic rod 4 and the shielding beam 1 is located above the hinge of the fixed part of the driving jack 5 and the shielding beam 1, and the hinge of the follow-up telescopic rod 4 and the tail beam 2 is located between the hinge of the tail beam 2 and the shielding beam 1 and the hinge of the driving jack 5 and the shielding beam 1. In other words, the driving jack 5 is located on the inner side of the follow-up telescopic rod 4, so that the space occupied by the equipment can be reduced. In turn, the safety space of the cable is large, the cable can be effectively protected, and the cable and liquid pipe can be arranged in zones.

[0042] In some embodiments, when no coal is placed at the rear of the hydraulic support, the telescopic part of the driving jack 5 is extended to a certain length, and the top surface of the tail beam 2 is at the same horizontal plane as the top surface of the shielding beam 1. At this moment, the stroke sensor 41 monitors the telescopic dimension of the inner rod 49 relative to the outer cylinder 48 as L0.

[0043] Entering the coal placing process, when placing coal at the rear of the hydraulic support, the telescopic part of the jack 5 is driven to contract so that the tail beam 2 rotates downward, and the travel sensor 41 monitors the extension dimension of the inner rod 49 relative to the outer cylinder 48 as L1. After the value of L1 reaches a preset value, the telescopic part of the jack 5 is driven to stop contracting so as to control the downward rotation position of the tail beam 2;

[0044] When the top coal is blocked during the process of falling, the telescopic part of the driving jack 5 is extended outward so that the tail beam 2 can rotate upward. The travel sensor 41 monitors the extension of the inner rod 49 relative to the outer cylinder 48 as L2. After the value of L2 reaches the preset value, the telescopic part of the driving jack 5 stops extending outward to control the position of the tail beam 2 rotating upward, so as to disturb the arch formed by the top coal. When the top coal is completely fallen and the gangue collapses, the coal placing process is completed, the telescopic part of the driving jack 5 is retracted, the tail beam 2 and the shield beam 1 are in a straight line again, and the travel sensor 41 monitors the extension of the inner rod 49 relative to the outer cylinder 48 to return to L0.

[0045] The present invention also proposes a top coal caving hydraulic support, and the top coal caving hydraulic support according to an embodiment of the present invention includes a follow-up coal caving device according to an embodiment of the present invention. Specifically, the follow-up coal caving device is arranged at the rear of the top coal caving hydraulic support, so that coal can be caved at the rear of the top coal caving hydraulic support.

[0046] The follow-up coal discharge device according to the embodiment of the present invention uses the driving jack 5 to provide power, and the follow-up telescopic rod 4 moves with the tail beam 2. The follow-up telescopic rod 4 cooperates with the stroke measuring device to measure the rotation position of the tail beam 2. In addition, the follow-up telescopic rod 4 does not enter liquid, does not bear force, and has a small specification, which realizes the separation of coal discharge port control and measurement, and does not affect each other, and is organically unified, so that the detection of the opening and closing degree of the coal discharge port does not interfere with the action of the driving jack 5 of the original tail beam 2 at all, and can realize accurate and intelligent control of the coal discharge mechanism without affecting the reliability and adaptability of the coal discharge mechanism.

[0047] Therefore, the follow-up coal caving device according to the embodiment of the present invention has the advantage of conveniently monitoring and controlling the rotation position of the tail beam 2. The top coal caving hydraulic support according to the embodiment of the present invention has the advantage of conveniently monitoring and controlling the rotation position of the tail beam 2.

[0048] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0049] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A follow-up coal placing device, characterized in that: include: A shielding beam, wherein the top surface of the shielding beam is a plane; a tail beam, the tail beam being located at one side of the shield beam in the first direction, one end of the tail beam being hinged to the shield beam, the rotation axis of the tail beam being in the second direction, any two of the first direction, the second direction and the up-down direction being perpendicular to each other, and an insert plate being provided at one end of the tail beam facing away from the shield beam in the first direction; A driving jack, wherein the driving jack is connected to the tail beam, and the driving jack can drive the tail beam to rotate relative to the shield beam; A follow-up telescopic rod, the telescopic rod comprising an outer cylinder and an inner rod, the inner rod being slidably arranged in the outer cylinder along the length direction of the follow-up telescopic rod, the outer cylinder being hinged to the shield beam, the inner rod being hinged to the tail beam, and the rotation axis of the outer cylinder and the inner rod being the second direction; A stroke measuring device is used to monitor the rotational position of the tail beam relative to the shield beam.

2. The follow-up coal placing device according to claim 1 is characterized in that: The stroke measuring device comprises a stroke sensor, which is arranged in the follow-up telescopic rod and is used to monitor the telescopic dimension of the inner rod relative to the outer cylinder.

3. The follow-up coal placing device according to claim 2 is characterized in that: The first end of the outer cylinder is hinged to the shield beam, and the stroke sensor is arranged in the outer cylinder and adjacent to the first end of the outer cylinder.

4. The follow-up coal placing device according to claim 3 is characterized in that: The inner rod is provided with an inner rod hole at the first end portion facing the outer cylinder, and a portion of the stroke sensor extends into the inner rod hole, or the inner rod is a solid rod, and the stroke sensor is connected to one end of the inner rod facing the first end portion of the outer cylinder through a connecting member; The first end of the outer cylinder is provided with a plug, the plug and the outer cylinder define a mounting cavity, the outer side of the outer cylinder is provided with a mounting shell, the cavity of the mounting shell, the mounting cavity and the cavity of the outer cylinder accommodating the inner rod are sequentially connected; The stroke measuring device comprises a cable connector, a cable connector socket, a stroke sensor socket and the stroke sensor which are connected in sequence. The cable connector socket, the stroke sensor socket and the stroke sensor are located in the installation cavity, and a part of the cable connector is arranged in the installation shell.

5. The follow-up coal placing device according to claim 4 is characterized in that: There are two follow-up telescopic rods, which are spaced apart in the second direction, and each follow-up telescopic rod cooperates with one stroke measuring device.

6. The follow-up coal placing device according to claim 5, characterized in that: There are two driving jacks, and the two driving jacks are located between the two follower telescopic rods in the second direction. The fixed part of the driving jack is hinged to the shield beam, and the telescopic part of the driving jack is hinged to the tail beam.

7. The follow-up coal placing device according to claim 6, characterized in that: The hinge between the follow-up telescopic rod and the shielding beam is located above the hinge between the fixing part of the driving jack and the shielding beam, and the hinge between the follow-up telescopic rod and the tail beam is located between the hinge between the tail beam and the shielding beam and the hinge between the driving jack and the shielding beam.

8. The follow-up coal placing device according to claim 6, characterized in that: The first end of the outer cylinder is hinged to the shield beam through two connecting ears, and the plug and the stroke sensor are located between the two connecting ears.

9. The follow-up coal placing device according to claim 6, characterized in that: When no coal is placed at the rear of the hydraulic support, the top surface of the tail beam and the top surface of the shield beam are at the same level; When coal is placed at the rear of the hydraulic support, the telescopic part of the driving jack is contracted so that the tail beam rotates downward, and the travel sensor monitors the extension dimension of the inner rod relative to the outer cylinder as L1. After the value of L1 reaches a preset value, the telescopic part of the driving jack stops contracting so as to control the downward rotation position of the tail beam; When an arch is formed during the falling process of the top coal, the telescopic part of the driving jack extends outward to allow the tail beam to rotate upward. The stroke sensor monitors the telescopic dimension of the inner rod relative to the outer cylinder as L2. After the value of L2 reaches a preset value, the telescopic part of the driving jack stops extending outward to control the upward rotation position of the tail beam.

10. A hydraulic support for top coal caving, characterized in that: It comprises the follow-up coal placing device as described in any one of claims 1-9.

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