Mining hydraulic support limiting pushing mechanism

Abstract

The invention provides a mining hydraulic support limiting pushing mechanism, and belongs to the field of hydraulic supports, the mining hydraulic support limiting pushing mechanism comprises a hydraulic support base, a rotating seat is arranged in the middle of the top of the hydraulic support base, a rotating shaft is rotatably connected in the rotating seat, and a pushing jack is fixedly connected outside the rotating shaft; a transverse plate is fixedly connected between the inner walls of the front side and the rear side of the hydraulic support base, and side plates are fixedly connected to the front side and the rear side between the bottom of the transverse plate and the top of the hydraulic support base correspondingly. The detection assembly comprises detection rings arranged on the left side and the right side of the outer side of the pushing jack in a sleeving mode, and the left side and the right side are distributed in a diagonal mode. Through the arranged detection assembly, real-time detection can be carried out according to the actual deflection of the advancing jack and two external parts which are most easily interfered to obtain whether the advancing jack reaches the deflection limit or not, so that an operator can conveniently know the situation at the first time, and the intelligent degree of the limiting advancing mechanism is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic supports, and specifically to a limit pushing mechanism for mine hydraulic supports. Background Technique

[0002] The pushing mechanism of the hydraulic support is installed in the middle block of the support base, and mainly includes a support base, a pushing rod, a connecting head and a pushing jack. One end of the pushing jack is connected to the base, and the other end is connected to the rear part of the pushing rod; the front part of the pushing rod is connected to the conveyor through the connecting head, and the pushing rod makes forward and backward stretching and retracting movements driven by the pushing jack, so that the conveyor and the shearer in the fully-mechanized coal mining face are advanced and the support moves forward.

[0003] In the existing actual work underground, when the conveyor and the shearer are advancing, they will inevitably slide up and down along the working face. Especially when the working face has a certain inclination angle, this phenomenon is particularly serious. At this time, it is required that the connection point between the pushing rod and the connecting head has a large movement range in the left and right directions to adapt to the up and down sliding of the conveyor; at the same time, due to the coal accumulation and undulation of the working face, space needs to be reserved for the up and down movement of the pushing rod, and the upward movement of the rear part of the pushing rod needs to be limited to avoid interference between the pushing jack and the base. However, the conventional limit mechanism can only limit passively. Through fixed structures such as plates or rods, the connecting shaft of the rotating pushing jack is passively limited and blocked, which makes it impossible for the operator to obtain the information whether the pushing jack is limited in the first time. Secondly, in some cases, there are sundries near the pushing jack, resulting in the further compression of its rotation space, and at this time, the fixed structure cannot adapt to this type of scenario to complete the reliable limit of the pushing jack.

[0004] Therefore, we propose a limit pushing mechanism for mine hydraulic supports to solve the problems encountered above. Summary of the Invention

[0005] Aiming at the deficiencies of the existing technology, the present invention provides a limit pushing mechanism for mine hydraulic supports to solve the problems raised in the above background technique.

[0006] The object of the present invention can be achieved by the following technical solutions: including a hydraulic support base, a swivel base is arranged at the middle of the top of the hydraulic support base, a rotating shaft is rotatably connected in the swivel base, a pushing jack is fixedly connected to the outside of the rotating shaft, a cross plate is fixedly connected between the front and rear inner walls of the hydraulic support base, and side plates are respectively fixedly connected between the bottom of the cross plate and the top of the hydraulic support base at the front and rear sides;

[0007] Detection component, the detection component includes detection rings sleeved on the left and right sides outside the pushing jack, and they are distributed diagonally left and right. The other side of the detection ring is fixedly connected with a semi-ring. The semi-ring and the inner ring of the detection ring form a circular cavity in combination. The pushing jack is partially located in the circular cavity. The detection ring is provided with a first square groove and a second square groove. The second square groove is located outside the first square groove and is communicated with the first square groove. A pressure-sensitive sheet is placed in the first square groove. An inner baffle is arranged on the pressure-sensitive sheet. Elastic sheets are fixedly connected to the left and right sides of the inner baffle. The same movable block is fixedly connected between the tops of the two elastic sheets. An outer baffle is fixedly connected in the second square groove;

[0008] Limiting component, the limiting component includes a connecting shaft rotatably connected to one of the side plates. Gears are fixedly connected to the outer ends of both the connecting shaft and the rotating shaft. The gears mesh with each other. A slot is opened at one end of the connecting shaft. An electromagnet is fixedly connected to the adjacent side of the other side plate. A limiting ring is also fixedly connected to this side of the side plate and outside the electromagnet. A sleeve is fixedly connected to the limiting ring. A sliding rod is slidably connected in the sleeve. A plug post is fixedly connected to one end of the sliding rod. A fixing ring is fixedly connected to the other end of the sliding rod. A magnet block is fixedly connected in the fixing ring. A spring is also sleeved on the outer side of the sliding rod. The two ends of the spring are respectively abutted against the fixing ring and the inner wall of the sleeve.

[0009] Preferably, through grooves are opened on both the inner baffle and the outer baffle. The cross-sectional dimension of the through groove on the outer baffle is adapted to the outer contour dimension of the movable block.

[0010] Preferably, the cross-sectional dimension of the second square groove is larger than that of the first square groove, and the cross-sectional dimension of the second square groove is adapted to the outer cross-sectional dimension of the outer baffle.

[0011] Preferably, the detection ring near the push rod of the pushing jack is located above the adjacent semi-ring.

[0012] Preferably, a plurality of sawtooth grooves are circularly opened on the inner wall of the slot, and the outer contour of the plug post is adapted to the inner cross-section of the slot.

[0013] Preferably, the end of the electromagnet close to the magnet block has the same magnetic pole as the end of the magnet block after the electromagnet is energized.

[0014] Preferably, a positioning groove is opened on the side plate close to the electromagnet, and the dimension of the positioning groove is consistent with that of the mounting base of the electromagnet.

[0015] Compared with the prior art, the beneficial effects of the present invention:

[0016] 1. Through the provided detection component, real-time detection can be carried out based on the actual deflection of the pushing jack and the two most easily interfered parts externally to obtain whether the pushing jack reaches the deflection limit, thus facilitating the operator to understand the situation in the first time and improving the intelligence level of the limit pushing mechanism.

[0017] 2. Through the provided limit component, when limit is needed, the movement of the pushing jack can be actively interfered by inserting the plug post into the slot, which is convenient for limiting the upper and lower deflectable angles of the pushing jack according to the real-time underground environment. The limit design is flexible enough, and the limit method for the pushing jack is reliable in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For the convenience of those skilled in the art to understand, the present invention will be further described below in conjunction with the drawings.

[0019] Figure 1 is the three-dimensional structure schematic diagram of the present invention;

[0020] Figure 2 is one of the partial enlarged structure schematic diagrams of the present invention;

[0021] Figure 3 is one of the partial enlarged structure schematic diagrams of the present invention;

[0022] Figure 4 is Figure 3 the enlarged structure schematic diagram at A in

[0023] Figure 5 is Figure 3 the enlarged structure schematic diagram at B in

[0024] In the figure: 1. Hydraulic support base; 2. Swivel base; 3. Rotating shaft; 4. Pushing jack; 5. Cross plate; 6. Side plate; 7. Detection ring; 8. Half ring; 9. First square groove; 10. Second square groove; 11. Pressure-sensitive sheet; 12. Inner retaining piece; 13. Elastic sheet; 14. Movable block; 15. Outer baffle; 16. Connecting shaft; 17. Gear; 18. Slot; 19. Electromagnet; 20. Limit ring; 21. Sleeve; 22. Slide bar; 23. Plug post; 24. Fixed ring; 25. Magnet block; 26. Spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to Figures 1 - 5As shown in the figure, a limit pushing mechanism for a mining hydraulic support includes a hydraulic support base 1. In the middle of the top of the hydraulic support base 1, a swivel base 2 is provided. A rotating shaft 3 is rotatably connected inside the swivel base 2. A pushing jack 4 is fixedly connected to the outside of the rotating shaft 3. A cross plate 5 is fixedly connected between the inner walls on the front and rear sides of the hydraulic support base 1. On the front and rear sides respectively between the bottom of the cross plate 5 and the top of the hydraulic support base 1, side plates 6 are fixedly connected. The swivel base 2 and the rotating shaft 3 are used for installing the pushing jack 4, and the side plates 6 are used for installing the limit component structure, which is convenient for installation and design;

[0027] A detection component. The detection component includes detection rings 7 sleeved on the left and right sides outside the pushing jack 4 and distributed diagonally. On the other side of the detection ring 7, a half ring 8 is fixedly connected. The half ring 8 and the inner ring of the detection ring 7 form a circular cavity in combination. Part of the pushing jack 4 is located in the circular cavity. A first square groove 9 and a second square groove 10 are formed in the detection ring 7. The second square groove 10 is located outside the first square groove 9 and is connected to the first square groove 9. A pressure-sensitive sheet 11 is placed in the first square groove 9. An inner retaining piece 12 is provided on the pressure-sensitive sheet 11. Elastic pieces 13 are fixedly connected to the left and right sides of the inner retaining piece 12. The same movable block 14 is fixedly connected between the tops of the two elastic pieces 13. An outer baffle 15 is fixedly connected in the second square groove 10;

[0028] It should be noted that the half ring 8 is used to cooperate with the detection ring 7 to install this structure outside the pushing jack 4. The first square groove 9 is used to accommodate the pressure-sensitive sheet 11 and the inner retaining piece 12. The second square groove 10 is used to install the outer baffle 15. A pressure column is provided at the bottom of the movable block 14. The pressure-sensitive sheet 11 is electrically connected to the external structure. The pressure-sensitive sheet 11 can change its own resistance by deforming itself under the extrusion of the pressure column, so as to know the magnitude of the pressure applied to it by the current pressure column. This is an existing mature technology. By judging the pressure change, it can be determined whether the up and down offset range of the pushing jack 4 at this time reaches the limit. The elastic pieces 13 can facilitate the reset of the movable block 14 after being pressed. The outer baffle 15 is used to enclose this part of the structure to prevent it from detaching from the groove. Through the set detection component, the actual deflection of the pushing jack 4 and the two most easily interfered parts outside can be detected in real time to obtain whether the pushing jack 4 reaches the deflection limit, so as to facilitate the operator to understand the situation in the first time and improve the intelligent degree of this limit pushing mechanism.

[0029] The limit assembly includes a connecting shaft 16 rotatably connected to one of the side plates 6, a gear 17 is fixedly connected to the outer end of the connecting shaft 16 and the outside of the rotating shaft 3, and the gears 17 are meshed with each other. A slot 18 is opened at one end of the connecting shaft 16, and an electromagnet 19 is fixedly connected to the adjacent side on the other side plate 6. A limit ring 20 is also fixedly connected to this side of the side plate 6 and located outside the electromagnet 19. A sleeve 21 is fixedly connected to the outside of the limit ring 20, and a slide rod 22 is slidably connected inside the sleeve 21. A plug post 23 is fixedly connected to one end of the slide rod 22, and a fixed ring 24 is fixedly connected to the other end of the slide rod 22. A magnet block 25 is fixedly connected inside the fixed ring 24. A spring 26 is also sleeved on the outside of the slide rod 22, and the two ends of the spring 26 are respectively abutted against the inner walls of the fixing ring 24 and the sleeve 21.

[0030] It should be noted that the meshing of the gear 17 is used to reduce the impact of the limit assembly on the installation of the push jack 4. The electromagnet 19 can be energized when necessary to cooperate with the magnet block 25, so that it drives the plug 23 to be pushed out through the slide bar 22 and inserted into the slot 18, thereby locking the connecting shaft 16, making it unable to drive the gear 17 to rotate, thereby achieving the locking of the rotating shaft 3, so that the push jack 4 can no longer deviate up and down, and the sleeve 21 is used to limit structures such as the slide bar 22 and the spring 26. One end of the sleeve 21 is provided with an opening for the sliding of the slide bar 22. Through the set limit assembly, when limiting is required, the plug 23 can be inserted into the slot 18 to actively interfere with the movement of the push jack 4, so as to limit the up and down deflectable angles of the push jack 4 according to the real-time environment of the mine. The limiting design is flexible enough, and the limiting method of the push jack 4 is reliable under different environments.

[0031] In this embodiment, both the inner baffle plate 12 and the outer baffle plate 15 are provided with through grooves, wherein the cross-sectional dimensions of the through groove on the outer baffle plate 15 are adapted to the outer contour dimensions of the movable block 14. The through groove can facilitate the passage of the movable block 14 and can limit it to prevent it from escaping from the first square groove 9, thereby ensuring the stability of the structural position after installation.

[0032] In this embodiment, the cross-sectional dimension of the second square groove 10 is larger than the cross-sectional dimension of the first square groove 9, and the cross-sectional dimension of the second square groove 10 is compatible with the outer cross-sectional dimension of the outer baffle plate 15. The second square groove 10 is used to install the outer baffle plate 15, and the structure in the first square groove 9 is closed by the outer baffle plate 15 to facilitate assembly.

[0033] In this embodiment, the detection ring 7 near the push rod on the push jack 4 is located above the adjacent half ring 8, and the detection rings 7 at both ends are located one above the half ring 8 and one below the adjacent half ring 8. This makes it convenient to detect the two areas that are most likely to be interfered when the push jack 4 is deflected, and the detection effect is better.

[0034] In this embodiment, a number of serrated grooves are circularly formed on the inner wall of the slot 18. The outer contour of the plug post 23 is adapted to the inner cross-section of the slot 18. By providing a number of serrated grooves, it is convenient for the plug post 23 to be inserted into the slot 18 when the slot 18 is rotated to different angles, facilitating the locking and limiting of the rotating shaft 3.

[0035] In this embodiment, after the electromagnet 19 is energized, the end close to the magnet block 25 has the same magnetic pole as this end of the magnet block 25. By setting the same magnetic poles, it is convenient for the electromagnet 19 to generate mutual repulsion with the magnet block 25 after being energized, causing the magnet block 25 to move under force and pushing out the plug post 23, facilitating the low-cost control of the movement of the plug post 23.

[0036] In this embodiment, a positioning groove is formed on the side plate 6 close to the electromagnet 19. The size of the positioning groove is consistent with that of the mounting base of the electromagnet 19. The positioning groove is used to mount the electromagnet 19, facilitating the structural assembly.

[0037] When the present invention is specifically used, during the operation of the push jack 4, the mechanism is connected to an external power supply in advance. When any movable block 14 outside the push jack 4 is pressed and moves, the sliding column below it contacts and presses the pressure-sensitive sheet 11, changing the electrical signal passing through the pressure-sensitive sheet 11. The external structure displays the pressure value of the current movable block 14. When the pressure value exceeds the set range, the controller controls the power supply to the electromagnet 19 by controlling the on-off of the circuit. After the electromagnet 19 is powered on, it pushes the magnet block 25 away through the mutual repulsion force with the magnet block 25. When the magnet block 25 moves, it pushes the plug post 23 to move through the fixing ring 24 and the sliding rod 22, causing the plug post 23 to be inserted into the slot 18, restricting the connecting shaft 16 from rotating by the plug post 23, and further preventing the push jack 4 from rotating through the rotating shaft 3 by the engagement of the gear 17, thereby completing the limiting of the push jack 4.

[0038] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A limit displacement mechanism for a mining hydraulic support, characterized in that: include A hydraulic support base (1), wherein a swivel seat (2) is arranged in the middle of the top of the hydraulic support base (1), a swivel shaft (3) is rotatably connected inside the swivel seat (2), a push jack (4) is fixedly connected outside the swivel shaft (3), a transverse plate (5) is fixedly connected between the front and rear inner walls of the hydraulic support base (1), and side plates (6) are fixedly connected between the bottom of the transverse plate (5) and the top of the hydraulic support base (1) on the front and rear sides respectively; A detection component, the detection component comprises a detection ring (7) sleeved on the left and right sides of the outer side of the push jack (4), and the left and right sides are diagonally distributed, a half ring (8) is fixedly connected to the other side of the detection ring (7), the half ring (8) and the inner ring of the detection ring (7) are combined to form a circular cavity, the push jack (4) is partially located in the circular cavity, a first square groove (9) and a second square groove (10) are opened on the detection ring (7), the second square groove (10) is located outside the first square groove (9) and is connected to the first square groove (9), a pressure-sensitive sheet (11) is placed in the first square groove (9), an inner baffle (12) is arranged on the pressure-sensitive sheet (11), and spring sheets (13) are fixedly connected to the left and right sides of the inner baffle (12), the top ends of the two spring sheets (13) are fixedly connected to the same movable block (14), and the second square groove (10) is fixedly connected to the outer baffle (15); A limit assembly, the limit assembly comprising a connecting shaft (16) rotatably connected to one of the side plates (6), a gear (17) fixedly connected to the outer end of the connecting shaft (16) and the outside of the rotating shaft (3), the gears (17) meshing with each other, a slot (18) being provided at one end of the connecting shaft (16), an electromagnet (19) being fixedly connected to the adjacent side of the other side plate (6), and a limit ring (20) being fixedly connected to the side of the side plate (6) and located outside the electromagnet (19), The limiting ring (20) is fixedly connected to the outside of a sleeve (21), and a slide rod (22) is slidably connected to the inside of the sleeve (21). One end of the slide rod (22) is fixedly connected to a plug post (23), and the other end of the slide rod (22) is fixedly connected to a fixing ring (24). A magnet block (25) is fixedly connected to the inside of the fixing ring (24). A spring (26) is also sleeved on the outside of the slide rod (22), and the two ends of the spring (26) are respectively in contact with the fixing ring (24) and the inner wall of the sleeve (21).

2. A limit displacement mechanism for a mining hydraulic support according to claim 1, characterized in that: The inner baffle (12) and the outer baffle (15) are both provided with through grooves, wherein the cross-sectional dimensions of the through groove on the outer baffle (15) are adapted to the outer contour dimensions of the movable block (14).

3. A limit displacement mechanism for a mining hydraulic support according to claim 2, characterized in that: The cross-sectional dimensions of the second square groove (10) are greater than the cross-sectional dimensions of the first square groove (9), and the cross-sectional dimensions of the second square groove (10) are compatible with the outer cross-sectional dimensions of the outer baffle (15).

4. A limit displacement mechanism for a mining hydraulic support according to claim 3, characterized in that: The detection ring (7) close to the push rod on the push jack (4) is located above the adjacent half ring (8).

5. A limit displacement mechanism for a mining hydraulic support according to claim 4, characterized in that: The inner wall of the slot (18) is provided with a plurality of sawtooth grooves in a circular shape, and the outer contour of the plug post (23) is adapted to the inner cross section of the slot (18).

6. A limit displacement mechanism for a mining hydraulic support according to claim 5, characterized in that: When the electromagnet (19) is energized, the end close to the magnet block (25) has the same magnetic pole as that of the magnet block (25).

7. A limit displacement mechanism for a mining hydraulic support according to claim 6, characterized in that: A positioning groove is provided on the side plate (6) close to the electromagnet (19), and the size of the positioning groove is consistent with the size of the mounting base of the electromagnet (19).

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