Combined hydraulic coal plough feedback device

Abstract

The utility model relates to the technical field of hydraulic coal ploughs, in particular to a combined feedback device of a hydraulic coal plough. Comprising a hydraulic push rod, a stroke rod fixing support, a first lower arc frame, a stroke rod guiding support, a second lower arc frame, an opening groove, a stainless steel stroke rod, a connecting body, a first fixing bolt, a second fixing bolt, a buckle assembly, a limiting assembly and a fixing assembly. Through the combined design of the first lower arc frame / the second lower arc frame and the fixing bolts, a traditional integral support is deconstructed into an upper half body and a lower half body with the hydraulic push rod as the center, a push rod connector does not need to be disassembled during installation, the installation time is shortened, and the stroke rod guide support adopts the open groove design; the stroke rod can be self-adaptively separated through the opening structure, structural damage caused by rigid contact is avoided, the reusability of the two supports of the feedback device of the hydraulic coal plough is improved, and the stainless steel stroke rod which is not easy to repair can be effectively protected.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic coal plowing technology, and in particular to a combined hydraulic coal plowing feedback device. Background Technology

[0002] The hydraulic coal plow is a coal unloading device installed on the conveyor belt above the raw coal bunker. Its function is to use the hydraulic plow to press down on the conveyor belt as it carries coal, causing a portion of the belt to change from a U-shaped curved surface to a flat surface, and unloading the coal onto the raw coal bunker. Simultaneously, the pressure is controlled to prevent damage to the conveyor belt. The hydraulic plow feedback device is crucial for controlling the plow's downward stroke. Currently, this device mainly consists of five components: a cast iron stroke rod fixing bracket, a cast iron stroke rod guide bracket, a stainless steel stroke rod, a lifting limit switch, and a limit switch bracket. The cast iron bracket and cast iron stroke rod guide bracket may break or the stainless steel stroke rod may deform if they extend or retract without proper alignment.

[0003] While existing cast iron supports possess high compressive strength, their bending modulus is insufficient, making them prone to brittle fracture under eccentric loads. Traditional supports are integral designs, requiring complete removal of the hydraulic push rod joints during installation. In practice, space constraints often lead to installation misalignment, causing radial interference between the stroke rod and the support. The stainless steel stroke rod has a hard contact fit with the inner wall of the support, directly bearing bending stress when the support deforms, resulting in irreversible plastic deformation of the stroke rod. Specifically, when the support is not properly aligned, even a small offset of the hydraulic push rod is amplified to the end of the stroke rod through leverage. Under the combined effect of the brittle characteristics of the cast iron support and the rigid constraint of the stainless steel stroke rod, a vicious cycle of "eccentric load-deformation-fracture" is formed. During repeated pressing of the coal plow, the lateral force generated by the deflection angle causes fatigue cracks at the root of the cast iron guide support. Simultaneously, the stainless steel stroke rod undergoes S-shaped deformation due to continuous bending, which may lead to support fracture, causing the stroke rod to detach. This can result in limit switch failure, overpressure of the coal plow, and severe tearing of the coal conveyor belt.

[0004] Therefore, to address the aforementioned issues, a combined hydraulic plow feedback device is proposed. Through the combined design of the first and second lower arc frames and fixing bolts, the traditional integral support is deconstructed into two halves centered on the hydraulic push rod. During installation, there is no need to disassemble the push rod joint, shortening the installation time. The stroke rod guide bracket adopts an open slot design. When the support has an angle, the stroke rod can self-disengage through the open structure, avoiding structural damage caused by rigid contact. This improves the reusability of the two supports of the hydraulic plow feedback device and effectively protects the stainless steel stroke rod, which is difficult to repair. Utility Model Content

[0005] In order to overcome the problems that occur when the cast iron support and cast iron stroke rod guide support are not aligned during the operation of the traditional hydraulic coal plow feedback device, the stainless steel stroke rod will deform when it is extended or retracted.

[0006] The technical solution of this utility model is as follows: a combined hydraulic coal plow feedback device, comprising a hydraulic push rod, a stroke rod fixing bracket, a first lower arc frame, a stroke rod guide bracket, a second lower arc frame, an opening slot, a stainless steel stroke rod, a connecting body, a first fixing bolt, a second fixing bolt, a buckle assembly, a limiting assembly, and a fixing assembly. The stroke rod fixing bracket is provided on the outer side of the hydraulic push rod, the first lower arc frame is provided below the stroke rod fixing bracket, the stroke rod guide bracket is provided on the outer side of the hydraulic push rod, the second lower arc frame is provided below the stroke rod guide bracket, an opening slot is provided above the stroke rod guide bracket, a stainless steel stroke rod is provided on the inner side of the stroke rod fixing bracket, a connecting body is provided at one end of the hydraulic push rod, the first fixing bolt is provided on the inner side of the stroke rod fixing bracket, and the second fixing bolt is provided on the inner side of the stroke rod guide bracket.

[0007] Preferably, the stroke rod fixing bracket and the first lower arc frame are disassembled and assembled using a first fixing bolt and nut structure, and the stroke rod guide bracket and the second lower arc frame are disassembled and assembled using a second fixing bolt and nut structure. This divides the stroke rod fixing bracket and the first lower arc frame into upper and lower parts centered on the hydraulic push rod. Similarly, the stroke rod guide bracket and the second lower arc frame are also divided into upper and lower parts centered on the hydraulic push rod, and are assembled and installed using the first fixing bolt and the second fixing bolt respectively. When assembling with the hydraulic push rod, it is not necessary to remove the front and rear joints of the push rod. The upper opening groove of the stroke rod guide bracket serves as a guide channel for the stroke rod. Through the opening structure of the opening groove, even if the stroke rod bracket and the guide bracket are not aligned at the center of the opening, the stroke rod can detach from the opening groove structure, avoiding deformation of the stroke rod bracket, the stroke rod guide bracket, and the stroke rod. This improves the reusability of the two brackets of the hydraulic coal plow feedback device, effectively protects the stainless steel stroke rod that is difficult to repair, and improves the convenience and efficiency of inspection and maintenance because each bracket can be divided into two parts, reducing the workload of personnel.

[0008] Preferably, the snap-fit ​​assembly includes a rotating shaft and a snap-fit ​​block. The rotating shaft is provided inside the opening slot, and the snap-fit ​​block is provided outside the rotating shaft. The snap-fit ​​block and the rotating shaft are rotatably connected.

[0009] Preferably, the buckle assembly also includes a fixing hole and a fixing pin, with the fixing hole provided on the inner side of the buckle block and the fixing pin provided on the inner side of the opening slot.

[0010] Preferably, the limit assembly includes a limit switch bracket and a lifting limit switch. A limit switch bracket is provided on one side of the travel rod guide bracket, and a lifting limit switch is provided on one side of the limit switch bracket. Two sets of lifting limit switches are provided.

[0011] Preferably, the fixing component includes a first fixing plate, a first fixing threaded rod, and a first ball bearing. The first fixing plate is provided on one side of the stroke rod guide bracket, and the first fixing threaded tube is provided on the inner side of the first fixing plate. The first fixing threaded rod and the first fixing plate are threadedly connected, and the first ball bearing is provided at one end of the first fixing threaded rod.

[0012] Preferably, the fixing assembly also includes a second fixing plate and a second fixing threaded rod. The second fixing plate is provided on one side of the second lower arc frame. There are two sets of the second fixing plates, which are symmetrically arranged. The second fixing threaded rod is provided on the inner side of the second fixing plate, and the second fixing threaded rod and the second fixing plate are threadedly connected.

[0013] Preferably, the fixing component also includes a second ball, and one end of the second fixing threaded rod is provided with the second ball.

[0014] The beneficial effects of this utility model are:

[0015] The stroke rod fixing bracket and the first lower arc frame are disassembled and assembled using the first fixing bolt and nut structure. The stroke rod guide bracket and the second lower arc frame are disassembled and assembled using the second fixing bolt and nut structure. This divides the stroke rod fixing bracket and the first lower arc frame into upper and lower parts centered on the hydraulic push rod. Similarly, the stroke rod guide bracket and the second lower arc frame are also divided into upper and lower parts centered on the hydraulic push rod. They are then assembled and installed using the first fixing bolt and the second fixing bolt, respectively. When assembling with the hydraulic push rod, it is not necessary to remove the front and rear joints of the push rod. The upper opening groove of the stroke rod guide bracket serves as a guide channel for the stroke rod. Through the opening structure of the opening groove, even if the stroke rod bracket and the guide bracket are not aligned at the center of the opening, the stroke rod can detach from the opening groove structure, avoiding deformation of the stroke rod bracket, the stroke rod guide bracket, and the stroke rod. This improves the reusability of the two brackets of the hydraulic plow feedback device and effectively protects the stainless steel stroke rod, which is difficult to repair. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the combined hydraulic coal plow feedback device of this utility model.

[0017] Figure 2 The diagram shown is a partial structural schematic of the combined hydraulic coal plow feedback device of this utility model.

[0018] Figure 3The diagram shown is a partial structural schematic of the combined hydraulic coal plow feedback device of this utility model.

[0019] Figure 4 The diagram shown is a side view of the combined hydraulic coal plow feedback device of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Hydraulic push rod; 2. Stroke rod fixing bracket; 3. First lower arc frame; 4. Stroke rod guide bracket; 5. Second lower arc frame; 6. Opening slot; 7. Stainless steel stroke rod; 8. Connecting body; 9. First fixing bolt; 10. Second fixing bolt; 201. Rotating shaft; 202. Buckle block; 203. Fixing hole; 204. Fixing pin; 301. Limit switch bracket; 302. Lifting limit switch; 401. First fixing plate; 402. First fixing threaded rod; 403. First ball bearing; 404. Second fixing plate; 405. Second fixing threaded rod; 406. Second ball bearing. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figure 1 and Figure 2 This utility model provides an embodiment: a combined hydraulic coal plow feedback device, including a hydraulic push rod 1, a stroke rod fixing bracket 2, a first lower arc frame 3, a stroke rod guide bracket 4, a second lower arc frame 5, an opening slot 6, a stainless steel stroke rod 7, a connecting body 8, a first fixing bolt 9, a second fixing bolt 10, a buckle assembly, a limiting assembly, and a fixing assembly. The stroke rod fixing bracket 2 is provided on the outer side of the hydraulic push rod 1, the first lower arc frame 3 is provided below the stroke rod fixing bracket 2, the stroke rod guide bracket 4 is provided on the outer side of the hydraulic push rod 1, the second lower arc frame 5 is provided below the stroke rod guide bracket 4, the opening slot 6 is provided above the stroke rod guide bracket 4, the stainless steel stroke rod 7 is provided on the inner side of the stroke rod fixing bracket 2, the connecting body 8 is provided at one end of the hydraulic push rod 1, the first fixing bolt 9 is provided on the inner side of the stroke rod fixing bracket 2, and the second fixing bolt 10 is provided on the inner side of the stroke rod guide bracket 4.

[0023] Please see Figure 3 and Figure 4In this embodiment, the snap-fit ​​assembly includes a rotating shaft 201 and a snap-fit ​​block 202. The rotating shaft 201 is provided on the inner side of the opening slot 6, and the snap-fit ​​block 202 is provided on the outer side of the rotating shaft 201. The snap-fit ​​block 202 and the rotating shaft 201 are rotatably connected. The snap-fit ​​assembly also includes a fixing hole 203 and a fixing pin 204. The fixing hole 203 is provided on the inner side of the snap-fit ​​block 202, and the fixing pin 204 is provided on the inner side of the opening slot 6. In use, rotating the snap-fit ​​block 202 is used to open and close the opening structure of the opening slot 6. The snap-fit ​​block 202 is fixed by inserting the fixing pin 204 and passing through the fixing hole 203.

[0024] The limiting assembly includes a limit switch bracket 301 and a lifting limit switch 302. A limit switch bracket 301 is provided on one side of the travel rod guide bracket 4, and a lifting limit switch 302 is provided on one side of the limit switch bracket 301. Two sets of lifting limit switches 302 are provided. The fixing assembly includes a first fixing plate 401, a first fixing threaded rod 402, and a first ball bearing 403. A first fixing plate 401 is provided on one side of the travel rod guide bracket 4. A first fixing threaded tube is provided on the inner side of the first fixing plate 401. The first fixing threaded rod 402 is threadedly connected to the first fixing plate 401. A first ball bearing 403 is provided at one end of the first fixing threaded rod 402. The fixing assembly also includes a second fixing plate 404 and a second fixing threaded rod 402. 5. A second fixing plate 404 is provided on one side of the second lower arc frame 5. Two sets of second fixing plates 404 are provided, and the two sets of second fixing plates 404 are symmetrically arranged. A second fixing threaded rod 405 is provided on the inner side of the second fixing plate 404. The second fixing threaded rod 405 and the second fixing plate 404 are threadedly connected. The fixing assembly also includes a second ball 406. A second ball 406 is provided at one end of the second fixing threaded rod 405. In use, the first fixing threaded rod 402 is rotated to make the first fixing threaded rod 402 move linearly. The two sets of second fixing threaded rods 405 are rotated to make the second fixing threaded rods 405 move linearly, so that the first ball 403 and the second ball 406 are in close contact with the surface of the hydraulic push rod 1, thereby fixing the position of the hydraulic push rod 1.

[0025] During operation, the combined hydraulic coal plow feedback device of this utility model is based on a hydraulic push rod 1 as its core, with a stroke rod fixing bracket 2 and a stroke rod guide bracket 4 mounted on its outer side. The bottom of the stroke rod fixing bracket 2 is connected to the first lower arc frame 3 by a first fixing bolt 9, and the bottom of the stroke rod guide bracket 4 is connected to the second lower arc frame 5 by a second fixing bolt 10, forming an upper and lower split structure with the hydraulic push rod 1 as the central axis. During installation, there is no need to disassemble the front and rear joints of the hydraulic push rod 1; simply snap the upper arc frame part onto the outside of the push rod, and then secure it with the first fixing bolt. Assembly is completed by tightening the second fixing bolt 10 with the nut; the top of the stroke rod guide bracket 4 has an opening slot 6 as a guide channel for the stainless steel stroke rod 7; when the bracket is off-angled due to installation error, the opening structure of the opening slot 6 allows the stainless steel stroke rod 7 to self-adaptively disengage, avoiding structural deformation or breakage caused by traditional hard contact. At the same time, the buckling assembly rotates the buckling block 202 through the rotating shaft 201, and the fixing pin 204 passes through the fixing hole 203 of the buckling block 202 to achieve the closing and locking of the opening slot 6, ensuring the stable guidance of the stroke rod under normal working conditions;

[0026] The guide bracket 4 of the stroke rod is fixed with a limit switch bracket 301 on its side, on which two sets of lifting limit switches 302 are installed, corresponding to the two extreme positions of the coal plow being pressed down and raised to the position respectively. When the stainless steel stroke rod 7 reaches the limit switch as the hydraulic push rod 1 extends and retracts, a trigger signal is fed back to the control system, which automatically stops the hydraulic push rod 1 to prevent overpressure damage to the coal conveyor belt. The latching block 202 of the latching assembly is connected to the side wall of the opening slot 6 through the rotating shaft 201. When maintenance or adjustment is required, the latching block 202 can be rotated by pulling out the fixing pin 204 to open the opening slot 6, which facilitates quick disassembly of the stainless steel stroke rod 7. In the closed state, the fixing pin 204 passes through the fixing hole 203 of the latching block 202 to lock the opening slot 6 into a closed channel, ensuring accurate guidance of the stroke rod in the standard alignment state and preventing accidental dislodgement during operation.

[0027] To accommodate the diameter differences of hydraulic push rods 1 of different specifications, the side of the stroke rod guide bracket 4 is provided with a first fixing plate 401, on which a first fixing threaded rod 402 is threadedly connected, and a first ball bearing 403 is installed at the end of the first fixing threaded rod 402; the side of the second lower arc frame 5 is provided with two sets of symmetrical second fixing plates 404, on which a second fixing threaded rod 405 is threadedly connected, and a second ball bearing 406 is installed at the end of the second fixing threaded rod 405; by rotating the first fixing threaded rod 402 and the second fixing threaded rod 405, the first ball bearing 403 and the second ball bearing 406 can be driven to move linearly until they are in close contact with the surface of the hydraulic push rod 1, forming multi-point elastic support; this design not only eliminates the stress concentration caused by traditional rigid fixing, but also reduces frictional resistance through the ball structure, allowing the hydraulic push rod 1 to adaptively adjust at a small deflection angle, while suppressing operating vibration and extending the service life of the bracket and the stroke rod.

[0028] Through the above steps, the stroke rod fixing bracket 2 and the first lower arc frame 3 are disassembled and assembled using the first fixing bolt 9 and nut structure, and the stroke rod guide bracket 4 and the second lower arc frame 5 are disassembled and assembled using the second fixing bolt 10 and nut structure. Thus, the stroke rod fixing bracket 2 and the first lower arc frame 3 are divided into upper and lower parts centered on the hydraulic push rod 1. Similarly, the stroke rod guide bracket 4 and the second lower arc frame 5 are also divided into upper and lower parts centered on the hydraulic push rod 1, and are respectively assembled and installed using the first fixing bolt 9 and the second fixing bolt 10. When assembling with the hydraulic push rod 1, it is not necessary to remove the front and rear joints of the push rod. The upper opening groove 6 of the stroke rod guide bracket 4 serves as the stroke rod guide channel. Utilizing the opening structure of the opening groove 6, even if the stroke rod bracket and the guide bracket are not aligned at the center of the opening, the stroke rod can detach from the opening structure of the opening groove 6, avoiding deformation of the stroke rod bracket, the stroke rod guide bracket 4, and the stroke rod. This improves the reusability of the two brackets of the hydraulic plow feedback device and effectively protects the stainless steel stroke rod 7, which is difficult to repair.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A combined hydraulic coal plow feedback device, comprising a hydraulic push rod (1), a stroke rod fixing bracket (2), a stroke rod guide bracket (4), and a stainless steel stroke rod (7); characterized in that: It also includes a first lower arc frame (3), a second lower arc frame (5), an opening slot (6), a connecting body (8), a first fixing bolt (9), a second fixing bolt (10), a buckle assembly, a limit assembly, and a fixing assembly. A stroke rod fixing bracket (2) is provided on the outside of the hydraulic push rod (1). A first lower arc frame (3) is provided below the stroke rod fixing bracket (2). A stroke rod guide bracket (4) is provided on the outside of the hydraulic push rod (1). A second lower arc frame (5) is provided below the stroke rod guide bracket (4). An opening slot (6) is provided above the stroke rod guide bracket (4). A stainless steel stroke rod (7) is provided on the inside of the stroke rod fixing bracket (2). A connecting body (8) is provided at one end of the hydraulic push rod (1). A first fixing bolt (9) is provided on the inside of the stroke rod fixing bracket (2). A second fixing bolt (10) is provided on the inside of the stroke rod guide bracket (4).

2. The combined hydraulic coal plow feedback device according to claim 1, characterized in that: The snap-fit ​​assembly includes a rotating shaft (201) and a snap-fit ​​block (202). The rotating shaft (201) is provided on the inner side of the opening slot (6), and the snap-fit ​​block (202) is provided on the outer side of the rotating shaft (201). The snap-fit ​​block (202) and the rotating shaft (201) are rotatably connected.

3. The combined hydraulic coal plow feedback device according to claim 2, characterized in that: The buckle assembly also includes a fixing hole (203) and a fixing pin (204). The fixing hole (203) is provided on the inner side of the buckle block (202), and the fixing pin (204) is provided on the inner side of the opening groove (6).

4. The combined hydraulic coal plow feedback device according to claim 1, characterized in that: The limit assembly includes a limit switch bracket (301) and a lifting limit switch (302). The limit switch bracket (301) is provided on one side of the travel rod guide bracket (4), and the lifting limit switch (302) is provided on one side of the limit switch bracket (301). There are two sets of lifting limit switches (302).

5. The combined hydraulic coal plow feedback device according to claim 1, characterized in that: The fixing assembly includes a first fixing plate (401), a first fixing threaded rod (402), and a first ball (403). The first fixing plate (401) is provided on one side of the stroke rod guide bracket (4), and a first fixing threaded tube is provided on the inner side of the first fixing plate (401). The first fixing threaded rod (402) and the first fixing plate (401) are threaded together, and a first ball (403) is provided at one end of the first fixing threaded rod (402).

6. The combined hydraulic coal plow feedback device according to claim 5, characterized in that: The fixing assembly also includes a second fixing plate (404) and a second fixing threaded rod (405). The second fixing plate (404) is provided on one side of the second lower arc frame (5). There are two sets of the second fixing plates (404), and the two sets of second fixing plates (404) are symmetrically arranged. The second fixing threaded rod (405) is provided on the inner side of the second fixing plate (404), and the second fixing threaded rod (405) and the second fixing plate (404) are threadedly connected.

7. The combined hydraulic coal plow feedback device according to claim 6, characterized in that: The fixing component also includes a second ball (406), and one end of the second fixing threaded rod (405) is provided with the second ball (406).

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