Port belt conveyor tension hydraulic adjusting device

Abstract

The utility model relates to and discloses a port belt conveyor tension hydraulic adjusting device which comprises a rectangular roller frame, a tensioning oil cylinder and a tension belt storage roller, the tension belt storage roller is installed in an inner frame of the rectangular roller frame in a sliding mode through a tensioning winch, and the rectangular roller frame and the tensioning winch are respectively and fixedly connected with two telescopic rods and a double-barrel cylinder body. Two guide cylinders are fixedly installed on the two sides of the rectangular roller frame, and guide rods are connected into first cylindrical hydraulic cavities in the two guide cylinders in a telescopic mode through two second pistons correspondingly. According to the port belt conveyor tension hydraulic adjusting device, under the series of transmission effects of first cylindrical hydraulic cavities in two guide cylinders, two high-pressure hoses, a hydraulic box and two second cylindrical hydraulic cavities in a double-cylinder cylinder body and the synchronous transmission effect of an end plate, a first transmission roller, a second transmission roller, two guide rods and two telescopic rods, the tension of the port belt conveyor can be adjusted; the tensioning device is used for synchronously linking stretching and retracting of a piston rod in the tensioning oil cylinder and moving of the tension belt storage roller.

Description

Technical Field

[0001] The utility model relates to the technical field of retractable belt conveyors, and particularly relates to a hydraulic tension adjusting device for a port belt conveyor. Background Technique

[0002] In coastal ports, belt conveyors have the advantages of strong conveying capacity, long conveying distance, simple structure and easy maintenance, and can be conveniently programmed and automated. Therefore, they are widely used. Among them, retractable belt conveyors can freely control the length of the belt conveyor, flexibly expand and contract, and can be applied to the material conveying needs under different occasions and space limitations; as is well known, if the tension of the belt in the retractable belt conveyor is too small at the separation point of the driving drum, the belt may slip on the driving drum. In addition, when the belt is too loose, the belts may contact each other in the storage device, causing the belt to deviate. Therefore, after each expansion and contraction of the belt in the retractable belt conveyor, the tension of the belt needs to be adjusted in time.

[0003] At present, the belts of retractable conveyors of models such as DSJ-800 and ZYJ-500 are dragged by a tightening winch instead of manual tensioning, and a pre-tightening program used in cooperation with a tightening oil cylinder needs to be set to realize arbitrary adjustment of the tightening force. When the tail of the machine moves, the conveying belt becomes loose and the tightening force decreases. At this time, the tightening winch in the tightening device can automatically work according to the pre-tightening program to tighten the conveying belt in time, so as to ensure the normal operation of the retractable conveyor. This article aims to propose a hydraulic adjusting device that does not require a pre-tightening program. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problem that the belts of retractable conveyors of models such as DSJ-800 and ZYJ-500 are dragged by a tightening winch instead of manual tensioning, and a pre-tightening program used in cooperation with a tightening oil cylinder needs to be set in the prior art, and a hydraulic tension adjusting device for a port belt conveyor is proposed.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A hydraulic tension adjusting device for a port belt conveyor includes a rectangular roller frame, end plates, a tightening oil cylinder and a tension storage belt roller. The tightening oil cylinder is vertically installed between the end of the rectangular roller frame and the end plates. The tension storage belt roller is slidably installed in the inner frame of the rectangular roller frame through a tightening winch. Two telescopic rods and a double-cylinder body are respectively fixedly connected to the rectangular roller frame and the tightening winch. The first ends of the two telescopic rods are respectively hermetically and telescopically installed in two cylindrical hydraulic cavities II in the double-cylinder body through two pistons.

[0007] On both sides of the rectangular roller frame, two guide cylinders are fixedly installed. In the cylindrical hydraulic chambers I of the two guide cylinders, two guide rods are telescopically connected through two pistons II respectively. The ends of the two guide rods are fixedly connected to the end plate, and hydraulic oil that communicates with each other is filled in the two cylindrical hydraulic chambers II and the two cylindrical hydraulic chambers I.

[0008] Preferably, the first end of the double-cylinder body is fixedly connected to a hydraulic box. The inner cavity of the hydraulic box communicates with the two cylindrical hydraulic chambers II. The hydraulic box communicates with the two cylindrical hydraulic chambers I through two high-pressure hoses respectively. The two ends of the high-pressure hose are fixedly connected to the hydraulic box and the guide cylinder respectively.

[0009] Preferably, the first end of the rectangular roller frame is rotatably installed with a driving roller III and a driving roller IV that are parallel to each other. Above and below the end plate, a driving roller I and a driving roller II that are parallel to each other are rotatably connected. And the driving roller I, the driving roller II, the driving roller III, and the driving roller IV are arranged in a rectangular shape in the same vertical plane. A tape loop is wound around the peripheries of the driving roller I, the driving roller II, the driving roller III, and the driving roller IV. The tension storage roller is press-fitted on the outer side of the tape loop.

[0010] Preferably, a conveying machine frame is fixedly connected below the rectangular roller frame. Two symmetrically arranged guide grooves are provided in the inner frame of the rectangular roller frame. Two pulleys are rotatably installed on both side end faces of the tension winch. The four pulleys are respectively installed in the two guide grooves in a rolling manner. The tension storage roller is rotatably installed on one side of the tension winch.

[0011] Preferably, a pressure regulating cylinder is fixedly communicated with one side of the hydraulic box. A piston I is slidably installed in the pressure regulating cylinder. One side of the piston I is rotatably connected to a pressure regulating screw rod. The pressure regulating screw rod is threadedly connected to the pressure regulating cylinder.

[0012] Preferably, a cross bar is fixedly connected to the end of the rectangular roller frame. The cross bar is fixedly connected to the base in the tensioning oil cylinder. The end of the piston rod in the tensioning oil cylinder is fixedly connected to the end plate.

[0013] Compared with the prior art, the utility model provides a tension hydraulic regulating device for a port belt conveyor, which has the following beneficial effects:

[0014] The tension hydraulic adjustment device for the port belt conveyor synchronizes the telescoping of the piston rod in the tensioning oil cylinder and the movement of the tension storage belt roller through a series of transmission actions of the two cylindrical hydraulic chambers I in the two guide cylinders, the two high-pressure hoses, the hydraulic box, and the two cylindrical hydraulic chambers II in the double-cylinder body, as well as the synchronous transmission actions of the end plate, the first driving roller, the second driving roller, the two guide rods, and the two telescopic rods. It can automatically tighten and loosen the tape loop without the need to additionally set a pre-tightening procedure for the pre-tightened tape loop, and always maintain the pre-tension of the tape loop. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. is a schematic structural diagram of a tension hydraulic adjustment device for a port belt conveyor proposed by the present utility model;

[0016] Figure 2 FIG. is a front view sectional view of a tension hydraulic adjustment device for a port belt conveyor proposed by the present utility model;

[0017] Figure 3 FIG. is a top view sectional view of a tension hydraulic adjustment device for a port belt conveyor proposed by the present utility model;

[0018] Figure 4 FIG. is a schematic connection structure diagram of the hydraulic box and the pressure regulating cylinder in a tension hydraulic adjustment device for a port belt conveyor proposed by the present utility model.

[0019] In the figure: 1, conveying frame; 2, rectangular roller frame; 3, guide cylinder; 4, guide rod; 5, end plate; 6, first driving roller; 7, second driving roller; 8, tape loop; 9, high-pressure hose; 10, hydraulic box; 11, third driving roller; 12, fourth driving roller; 13, pressure regulating screw; 14, pressure regulating cylinder; 15, tensioning oil cylinder; 16, guide groove; 17, tension storage belt roller; 18, telescopic rod; 19, tensioning winch; 20, double-cylinder body; 21, first piston; 22, second piston; 23, first cylindrical hydraulic chamber; 24, second cylindrical hydraulic chamber; 25, pulley; 26, cross bar; 27, third piston. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] Referring to the attached Figures 1-4 , a hydraulic tension adjusting device for a port belt conveyor, comprising a conveying frame 1. Above the conveying frame 1, a rectangular roller frame 2 is fixedly installed. At the head end of the rectangular roller frame 2, a driving roller three 11 and a driving roller four 12 which are parallel to each other are rotatably connected. In the inner frame of the rectangular roller frame 2, two symmetrically arranged guide grooves 16 are provided. A tension winch 19 is slidably installed between the two guide grooves 16 in the rectangular roller frame 2 through four pulleys 25. The inner sides of the four pulleys 25 are respectively rotatably installed on the two end faces of the tension winch 19, and the outer sides of the four pulleys 25 are respectively rollingly installed in the two guide grooves 16. On one side of the tension winch 19, a tension storage belt roller 17 which is parallel to each other is rotatably installed. The tension storage belt roller 17, the driving roller three 11, and the driving roller four 12 are arranged in parallel.

[0023] In this embodiment, two symmetrically arranged guide cylinders 3 are fixedly installed on the outer side of the rectangular roller frame 2. A cylindrical hydraulic chamber one 23 is provided in each of the two guide cylinders 3. A guide rod 4 is telescopically installed in each of the two guide cylinders 3. A piston two 22 is fixedly installed at the head end of the guide rod 4. The two piston two 22 are respectively hermetically and telescopically installed in the two cylindrical hydraulic chambers one 23. A end plate 5 is fixedly installed at the end of the two guide rods 4. Above and below the end plate 5, a driving roller one 6 and a driving roller two 7 which are parallel to each other are provided. The driving roller one 6 and the driving roller two 7 are also arranged in parallel with the driving roller three 11, and the driving roller one 6, the driving roller two 7, the driving roller three 11, and the driving roller four 12 are arranged in a rectangular shape in the same vertical plane.

[0024] In this embodiment, a cross bar 26 is fixedly connected to the end of the rectangular roller frame 2. The cross bar 26 and the end plate 5 are parallel to each other, and a tensioning oil cylinder 15 is vertically connected between the cross bar 26 and the end plate 5. The base in the tensioning oil cylinder 15 is fixedly connected to the cross bar 26, and the end of the piston rod in the tensioning oil cylinder 15 is fixedly connected to the end plate 5. As is well known, the piston rod in the tensioning oil cylinder 15 can reciprocate along the base of the tensioning oil cylinder 15, and by using the reciprocating movement of the piston rod in the tensioning oil cylinder 15 and the synchronous transmission of the end plate 5, the two guide rods 4 are driven to make a linear reciprocating movement along the two guide cylinders 3, so as to achieve the purpose of changing the length of the rectangle formed by the driving roller one 6, the driving roller two 7, the driving roller three 11, and the driving roller four 12.

[0025] In this embodiment, a tape loop 8 is wound around the peripheries of the first driving roller 6, the second driving roller 7, the third driving roller 11, and the fourth driving roller 12. The tension storage roller 17 is press-fitted on the outer side of the tape loop 8. As Figure 2 , the excess part of the tape loop 8 is bent inward and stored by the tension storage roller 17. Secondly, in this embodiment, the tension storage roller 17 bends the tape loop 8 into four mutually parallel upper and lower surfaces, that is, the tape loop 8 is always kept in a taut state, and the distance that the guide rod 4 extends outward is the same as the distance that the tension storage roller 17 retracts accordingly.

[0026] In this embodiment, a hydraulic box 10 is fixedly installed at the head end of the rectangular roller frame 2. A double-cylinder body 20 and two telescopic rods 18 are vertically connected between the hydraulic box 10 and the tension winch 19. The double-cylinder body 20 is fixedly connected to the hydraulic box 10. Two mutually parallel cylindrical hydraulic cavities II 24 are provided in the double-cylinder body 20. The ends of the two telescopic rods 18 are fixedly connected to the tension winch 19. The heads of the two telescopic rods 18 are respectively telescopically connected into the two cylindrical hydraulic cavities II 24 in the double-cylinder body 20. Pistons III 27 are fixedly connected to the heads of the two telescopic rods 18. The pistons III 27 are in sealed sliding connection with the inner cavities of the cylindrical hydraulic cavities II 24. The inner cavity of the hydraulic box 10 communicates with the two cylindrical hydraulic cavities II 24.

[0027] It should be added that the cylindrical hydraulic cavity I 23, the cylindrical hydraulic cavity II 24, and the tensioning oil cylinder 15 are parallel to each other, and the inner diameters of the cylindrical hydraulic cavity I 23 and the cylindrical hydraulic cavity II 24 are the same. The two cylindrical hydraulic cavities I 23 and the inner cavity of the hydraulic box 10 are connected to each other through two high-pressure hoses 9, that is, the two ends of the high-pressure hoses 9 are respectively fixedly connected to the head end of the guide cylinder 3 and the hydraulic box 10, that is, the two cylindrical hydraulic cavities I 23 and the two cylindrical hydraulic cavities II 24 are respectively fixedly connected to the hydraulic box 10 through the two high-pressure hoses 9, and hydraulic oil that communicates with each other is filled in the two cylindrical hydraulic cavities I 23, the two cylindrical hydraulic cavities II 24, the two high-pressure hoses 9, and the hydraulic box 10;

[0028] Further supplemented, when the two guide rods 4 push the two second pistons 22 to retract along the two cylindrical hydraulic chambers 23 in the two guide cylinders 3 and compress the hydraulic oil in the two cylindrical hydraulic chambers 23, the hydraulic oil in the two cylindrical hydraulic chambers 23 will sequentially pass through the two high-pressure hoses 9 and the hydraulic box 10 and be delivered into the two cylindrical hydraulic chambers 24 in the double-cylinder body 20. Moreover, the inner diameters of the cylindrical hydraulic chamber 23 and the cylindrical hydraulic chamber 24 are the same. Thus, the hydraulic oil entering the two cylindrical hydraulic chambers 24 can push the two third pistons 27 and the two telescopic rods 18 to extend outwards, which is used to push the tension winch 19 and the tension belt storage roller 17 to squeeze the outer side of the tape loop 8 along the two guide grooves 16 in the rectangular roller frame 2, achieving the purpose of automatically adjusting the tension of the tape loop 8 and preventing the tape loop 8 from loosening due to the contraction of the two guide rods 4 and the end plate 5.

[0029] In this embodiment, a pressure regulating cylinder 14 is fixedly communicated with one side of the hydraulic box 10. A first piston 21 is slidably installed in the pressure regulating cylinder 14 in a sealed manner. One side of the first piston 21 is rotatably connected with a pressure regulating screw 13. The pressure regulating screw 13 is threadedly connected with the pressure regulating cylinder 14. By turning the pressure regulating screw 13, the first piston 21 can be pushed to move along the inner cavity of the pressure regulating cylinder 14, thereby changing the pressure of the hydraulic oil in the hydraulic box 10.

[0030] In this utility model, by utilizing the reciprocating motion of the piston rod of the tensioning oil cylinder 15 and the synchronous transmission of the end plate 5, the two guide rods 4 are driven to make linear reciprocating movements along the cylindrical hydraulic chambers 23 of the two guide cylinders 3, achieving the purpose of changing the length of the tape loop 8. It can be applied to the material conveying requirements under different occasions and space limitations. Generally, under normal temperature and pressure, the bulk modulus of elasticity of pure hydraulic oil is 1.4 - 2.0 GPa, that is, the hydraulic oil has a certain compressibility. However, under the high-damping extrusion action of the outer tape loop 8, the hydraulic oil in the cylindrical hydraulic chamber 23 and the cylindrical hydraulic chamber 24 can effectively offset a part of the elastic deformation of the hydraulic oil, and always keep the hydraulic oil in the cylindrical hydraulic chamber 23 and the cylindrical hydraulic chamber 24 in a high-pressure state, mainly used to reduce the influence of the elastic deformation of the hydraulic oil on the expansion and contraction of the tape loop 8. By turning the pressure regulating screw 13, the first piston 21 can be pushed to move along the inner cavity of the pressure regulating cylinder 14, thereby changing the pressure of the hydraulic oil in the hydraulic box 10;

[0031] Such as Figure 3, when the above two guide rods 4 drive the second piston 22 to move rightward along the two first cylindrical hydraulic chambers 23, and when increasing the length of the tape loop 8, the cavity filled with hydraulic oil in the first cylindrical hydraulic chamber 23 increases, generating negative pressure, and the hydraulic oil in the two second cylindrical hydraulic chambers 24 in the double-cylinder body 20 is extracted by the two high-pressure hoses 9 and the hydraulic box 10. The hydraulic oil in the second cylindrical hydraulic chamber 24 decreases, which is used to negatively attract the two third pistons 27 and the telescopic rod 18, thereby driving the four pulleys 25 on both sides of the tension winch 19 to move leftward along the two guide grooves 16 in the rectangular roller frame 2. The tape loop 8 that is always in a tension state will also push the tension storage roller 17 and the tension winch 19 to move leftward, and the moving tension winch 19 drives the tension storage roller 17 to move leftward, automatically loosening the tape loop 8 stored by the tension storage roller 17. That is, the distance that the tape loop 8 extends to the right is the same as the distance that the tension storage roller 17 moves to the left, always maintaining the tension of the tension storage roller 17 on the tape loop 8;

[0032] Similarly, when the two guide rods 4 drive the second piston 22 to move leftward along the two first cylindrical hydraulic chambers 23, and when reducing the length of the tape loop 8, the cavity filled with hydraulic oil in the first cylindrical hydraulic chamber 23 decreases, generating high pressure, and the hydraulic oil is filled into the two second cylindrical hydraulic chambers 24 in the double-cylinder body 20 by the two high-pressure hoses 9 and the hydraulic box 10. The hydraulic oil in the second cylindrical hydraulic chamber 24 increases, which is used to push the two third pistons 27 and the telescopic rod 18 to move rightward, thereby driving the four pulleys 25 on both sides of the tension winch 19 to move rightward along the two guide grooves 16 in the rectangular roller frame 2, and the tension storage roller 17 on the right side of the tension winch 19 pushes the outer side of the tape loop 8 to move rightward and store it inward. That is, the distance that the right end of the tape loop 8 retracts is the same as the distance that the tension storage roller 17 moves to the right, always maintaining the tension of the tape loop 8;

[0033] As can be seen from the above, when the tape loop 8 expands and contracts through a series of output transmissions of the tensioning oil cylinder 15, the end plate 5, the first driving roller 6, and the second driving roller 7, and then through the hydraulic synchronous transmission of the two first cylindrical hydraulic chambers 23, the two high-pressure hoses 9, the hydraulic box 10, and the two second cylindrical hydraulic chambers 24, as well as the synchronous transmission of the two guide rods 4 and the two telescopic rods 18, it is used to automatically loosen and tighten the tape loop 8, with a fast response. There is no need to additionally set a pre-tightening program for pre-tightening the tape loop 8, and the tape loop 8 is always maintained at a stable tension.

[0034] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A hydraulic tension adjustment device for a port belt conveyor, comprising a rectangular roller frame (2), an end plate (5), a tensioning oil cylinder (15) and a tension storage roller (17), wherein the tensioning oil cylinder (15) is vertically installed between the end of the rectangular roller frame (2) and the end plate (5), and the tension storage roller (17) is slidably installed in the inner frame of the rectangular roller frame (2) through a tensioning winch (19), characterized in that: The rectangular roller frame (2) and the tensioning winch (19) are respectively fixedly connected with two telescopic rods (18) and a double-tube cylinder (20), and the head ends of the two telescopic rods (18) are respectively installed in two cylindrical hydraulic chambers (24) in the double-tube cylinder (20) through two pistons (27) in a sealed telescopic manner; Two guide cylinders (3) are fixedly installed on both sides of the rectangular roller frame (2), and the cylindrical hydraulic chambers (23) in the two guide cylinders (3) are telescopically connected to guide rods (4) through two pistons (22), respectively, and the ends of the two guide rods (4) are fixedly connected to the end plate (5), and the two cylindrical hydraulic chambers (24) and the two cylindrical hydraulic chambers (23) are filled with hydraulic oil that is interconnected.

2. A hydraulic tension adjustment device for a port belt conveyor according to claim 1, characterized in that: The head end of the double-tube cylinder (20) is fixedly connected to a hydraulic box (10), the inner cavity of the hydraulic box (10) and the two cylindrical hydraulic chambers (24) are interconnected, the hydraulic box (10) is respectively interconnected with the two cylindrical hydraulic chambers (23) through two high-pressure hoses (9), and the two ends of the high-pressure hose (9) are respectively fixedly connected to the hydraulic box (10) and the guide tube (3).

3. A hydraulic tension adjustment device for a port belt conveyor according to claim 1, characterized in that: The front end of the rectangular roller frame (2) is rotatably mounted with a transmission roller three (11) and a transmission roller four (12) which are parallel to each other, and the upper and lower sides of the end plate (5) are rotatably connected with a transmission roller one (6) and a transmission roller two (7) which are parallel to each other, and the transmission roller one (6), the transmission roller two (7), the transmission roller three (11), and the transmission roller four (12) are arranged in a rectangular shape on the same vertical plane, and a belt ring (8) is wound around the outer periphery of the transmission roller one (6), the transmission roller two (7), the transmission roller three (11), and the transmission roller four (12), and the tension storage roller (17) is extruded and mounted on the outer side of the belt ring (8).

4. A hydraulic tension adjustment device for a port belt conveyor according to claim 1, characterized in that: A conveyor frame (1) is fixedly connected to the lower part of the rectangular roller frame (2); two mutually symmetrical guide grooves (16) are arranged in the inner frame of the rectangular roller frame (2); two pulleys (25) are rotatably mounted on both side end surfaces of the tensioning winch (19); the four pulleys (25) are respectively rotatably mounted in the two guide grooves (16); and the tension storage roller (17) is rotatably mounted on one side of the tensioning winch (19).

5. The hydraulic tension adjustment device for a port belt conveyor according to claim 2, characterized in that: One side of the hydraulic box (10) is fixedly connected to a pressure regulating cylinder (14), a piston (21) is slidably installed in the pressure regulating cylinder (14), one side of the piston (21) is rotatably connected to a pressure regulating screw (13), and the pressure regulating screw (13) and the pressure regulating cylinder (14) are threadedly connected.

6. The hydraulic tension adjustment device for a port belt conveyor according to claim 1, characterized in that: The end of the rectangular roller frame (2) is fixedly connected to a cross bar (26), the cross bar (26) is fixedly connected to a base in the tensioning cylinder (15), and the end of the piston rod in the tensioning cylinder (15) is fixedly connected to the end plate (5).

Images