Synchronous adjusting device for screen box of vibrating screen

Abstract

The utility model aims to provide a synchronous adjusting device for a screen box of a vibrating screen, and belongs to the technical field of material vibrating screening equipment. The main hydraulic oil cylinder and the auxiliary hydraulic oil cylinder are arranged on the two sides of a screen box, a three-way main cylinder oil supply port is formed in a cylinder body I of the main hydraulic oil cylinder, one path of the main cylinder oil supply port provides high-pressure oil for a piston rod I, and the other path of the main cylinder oil supply port provides high-pressure oil for the auxiliary hydraulic oil cylinder through an oil supply pipeline; an oil return opening I of the main hydraulic oil cylinder is communicated with the hydraulic oil tank through an oil return pipeline, and an oil return opening II is communicated with an oil return opening III through an oil return pipeline. The three-way main cylinder oil supply port, the oil return port I and the oil return port II are formed in the cylinder body I of the main hydraulic oil cylinder, the oil return port I and the oil return port II are communicated with each other, and the main hydraulic oil cylinder and the auxiliary hydraulic oil cylinder are connected in series, so that synchronous lifting of the two hydraulic oil cylinders is accurately realized; the technical problem that in the prior art, due to the fact that two hydraulic cylinders are not synchronous, mud drifts is fundamentally solved.

Description

Technical Field

[0001] The utility model relates to the technical field of material vibration screening equipment, in particular to a synchronous adjustment device for a vibration screen box. Background Art

[0002] The screening efficiency of the vibrating screen is related to many factors, one of which is the inclination angle of the screen box. The inclination angle mentioned above refers to the angle between the horizontal plane and the screen. This angle affects the projection shape and size of the mesh on the horizontal plane, and also affects the running speed of the granular material on the screen. When the inclination angle of the screen box is too large, the material will pass through quickly, and the screening quality and accuracy are difficult to guarantee. When the inclination angle of the screen box is too small, the gravity of the material is insufficient and the forward movement is slow, which will cause the material to accumulate on the screen. In order to adapt to different muds and different slurry feeding conditions, the vibrating screen needs to adjust the inclination angle of the screen box during the screening process.

[0003] Chinese patent CN218833803U discloses a vibrating screen box angle adjustment device, which uses a forward and reverse motor to drive a hydraulic pump to inject or suck out hydraulic oil into the left hydraulic cylinder and the right hydraulic cylinder at the same time. In order to facilitate the arrangement of the oil inlet pipeline and the oil return pipeline, a hydraulic station with a forward and reverse motor and a hydraulic pump is arranged in the middle position of the left hydraulic cylinder and the right hydraulic cylinder. In other words, the above device uses the hydraulic station to inject or suck out hydraulic oil into the left hydraulic cylinder and the right hydraulic cylinder respectively through the hydraulic pipeline, that is, the left hydraulic cylinder and the right hydraulic cylinder are arranged in parallel. Through the above arrangement, compared with the traditional method that mostly uses manual adjustment, it improves and optimizes the adjustment method of the vibrating screen box angle (the traditional method is time-consuming and labor-intensive, and the angle error of the left and right sides of the vibrating screen is large), the adjustment error is reduced, and the technical problems of large adjustment error and easy damage to the spring structure when adjusting the angle of the vibrating screen box in the prior art are solved. However, the above device also has the following problems: 1. Since the left hydraulic cylinder and the right hydraulic cylinder are arranged in parallel, there are many installation joints, which leads to many leakage points and inconvenient on-site use and maintenance; 2. The parallel arrangement makes it difficult to ensure the synchronization of the two cylinders during operation, which causes the screen to be uneven and the mud to flow unevenly, affecting the screening efficiency; 3. In addition to the forward and reverse motors and hydraulic pumps, the hydraulic station should also include components such as hydraulic oil tanks, which are large in size and high in cost. Utility Model Content

[0004] The utility model aims to provide a synchronous adjustment device for a vibrating screen box, which connects the main hydraulic cylinder and the auxiliary hydraulic cylinder in series by providing a three-way main cylinder oil supply port and mutually connected oil return port I and oil return port II in the cylinder body I of the main hydraulic cylinder, thereby accurately realizing the synchronous lifting and lowering of the two hydraulic cylinders, and always keeping the screen flat during the adjustment process, fundamentally solving the technical problem of mud deviation caused by the lack of synchronization between the two hydraulic cylinders in the prior art, improving the screening efficiency, and reducing the number of leakage points. It is convenient to use and maintain on site, safe and reliable, simple in structure, and low in cost.

[0005] To achieve the above purpose, the utility model adopts the following technical solution: a vibrating screen box synchronous adjustment device, comprising two hydraulic cylinders arranged on both sides of the screen box, one of which is a main hydraulic cylinder and the other is a secondary hydraulic cylinder;

[0006] A three-way main cylinder oil supply port is provided inside the cylinder body I of the main hydraulic oil cylinder. One way of the main cylinder oil supply port provides high-pressure oil to the piston rod I, and the other way of the main cylinder oil supply port provides high-pressure oil to the auxiliary hydraulic oil cylinder through the oil supply pipeline;

[0007] The main hydraulic cylinder has a cylinder body I with an oil return port I and an oil return port II that are interconnected, and the auxiliary hydraulic cylinder has an oil return port III on its cylinder body II.

[0008] The oil return port I of the main hydraulic cylinder is connected to the hydraulic oil tank through an oil return pipeline, and the oil return port II is connected to the oil return port III through an oil return pipeline.

[0009] As an improvement of the utility model, the hydraulic oil tank is installed on the balance beam on the same side as the main hydraulic oil cylinder, and a hand pump is installed on the top of the hydraulic oil tank.

[0010] As an improvement of the utility model, the hydraulic oil tank is installed near the main hydraulic oil cylinder.

[0011] As an improvement of the utility model, a pipeline groove is provided below the guide plate at the front end of the screen box, and the oil supply pipeline and the oil return pipeline between the main hydraulic cylinder and the auxiliary hydraulic cylinder are both installed in the pipeline groove.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a synchronous adjustment device for a vibrating screen box, which connects the main hydraulic cylinder and the auxiliary hydraulic cylinder in series by providing a three-way main cylinder oil supply port and mutually connected oil return port I and oil return port II in the cylinder body I of the main hydraulic cylinder, thereby accurately realizing the synchronous lifting and lowering of the two hydraulic cylinders, and always keeping the screen flush during the adjustment process, fundamentally solving the technical problem of mud deviation caused by the lack of synchronization between the two hydraulic cylinders in the prior art, and improving the screening efficiency; by providing a built-in three-way and mutually connected oil return port I and oil return port II in the cylinder body I of the main hydraulic cylinder, the main hydraulic cylinder and the auxiliary hydraulic cylinder are conveniently connected in series, the number of joints is reduced, and thus the number of leakage points is reduced, the on-site use and maintenance are convenient, safe and reliable, the structure is simple, and the cost is low.

[0013] Furthermore, the hydraulic oil tank is installed on the balance beam on the same side as the main hydraulic cylinder, and a hand pump is installed on the top of the hydraulic oil tank. Through the above design, compared with the hydraulic station containing forward and reverse motors and hydraulic pumps, the volume is smaller, the cost is lower, the operation is convenient, and the equipment performance is safe and reliable; at the same time, the hydraulic oil tank is installed on the balance beam on the same side as the main hydraulic cylinder, which greatly reduces the length of the oil supply pipeline and the oil return pipeline, further saving the production cost.

[0014] Furthermore, a pipeline groove is provided below the guide plate at the front end of the screen box, and the oil supply pipeline and the oil return pipeline between the main hydraulic cylinder and the auxiliary hydraulic cylinder are installed in the pipeline groove. Through the above design, the layout of the oil supply pipeline and the oil return pipeline is standardized, which improves the industrial aesthetics of the entire device; through the setting of the pipeline groove, the oil supply pipeline and the oil return pipeline are protected, which can effectively prevent the external environment from damaging the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the local structure of the utility model when it is installed on a vibrating screen;

[0016] Figure 2 It is a partial structural schematic diagram of the main hydraulic cylinder of the utility model;

[0017] Figure 3 It is a partial structural schematic diagram of the auxiliary hydraulic cylinder of the utility model.

[0018] In the figure, 1. hand pump; 2. balance beam; 3. screen box; 4. hydraulic oil tank; 5. oil supply pipeline; 6. oil return pipeline; 7. base; 8. main hydraulic cylinder; 81. piston rod Ⅰ; 82. cylinder body Ⅰ; 83. annular oil return passage Ⅰ; ​​84. return oil port Ⅰ; 85. oil supply port Ⅰ; 86. oil supply port Ⅱ; 87. oil supply port Ⅲ; 88. oil return port Ⅱ; 89. connecting port Ⅰ; 9. pipeline groove; 10. auxiliary hydraulic cylinder; 101. piston rod Ⅱ; 102. cylinder body Ⅱ; 103. annular oil return passage Ⅱ; 104. return oil port Ⅲ; 105. oil supply port Ⅳ; 106. connecting port Ⅱ. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0020] It should be noted that the directional terms such as up, down, left, right, front, and back in the embodiments of the present invention are merely relative concepts or are based on the normal use status of the product and should not be considered as restrictive.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a synchronous adjustment device for a vibrating screen box includes a hydraulic oil tank 4, a hand pump 1 and two hydraulic cylinders arranged on both sides of the screen box 3, wherein one hydraulic cylinder is a main hydraulic cylinder 8 and the other is an auxiliary hydraulic cylinder 10. The hydraulic oil tank 4 is installed on the balance beam 2 on the same side as the main hydraulic cylinder 8, and a hand pump 1 is installed on the top of the hydraulic oil tank 4. Preferably, the hydraulic oil tank 4 is installed near the main hydraulic cylinder 8. A three-way main cylinder oil supply port is provided inside the cylinder body Ⅰ82 of the main hydraulic cylinder 8. The main cylinder oil supply port provides high-pressure oil to the piston rod Ⅰ81 on one way, and provides high-pressure oil to the auxiliary hydraulic cylinder 10 through the oil supply pipeline 5 on the other way. Figure 2 In the figure, the three-way master cylinder oil supply port is composed of the oil supply port I85, the oil supply port II86 and the oil supply port III87 which are interconnected, wherein the oil supply port I85 is connected to the hydraulic oil tank 4 via the oil supply pipeline 5 via the hand pump 1, that is, the hand pump 1 provides high-pressure oil to the oil supply port I85 via the oil supply pipeline 5, and the oil supply port II86 is connected to the oil supply port IV105 of the auxiliary hydraulic cylinder 10 via the oil supply pipeline 5, that is, the oil supply port II86 provides high-pressure oil to the auxiliary hydraulic cylinder 10 via the oil supply pipeline 5.

[0022] The cylinder body Ⅰ82 of the main hydraulic oil cylinder 8 is provided with an oil return port Ⅰ84 and an oil return port Ⅱ88 which are connected to each other, wherein the oil return port Ⅰ84 and the oil return port Ⅱ88 are connected through the annular oil return passage Ⅰ83 in the cylinder body Ⅰ82, and the hydraulic oil in the rod chamber of the main hydraulic oil cylinder 8 is connected to the annular oil return passage Ⅰ83 through the connecting port Ⅰ89. The cylinder body Ⅱ102 of the auxiliary hydraulic oil cylinder 10 is provided with an oil return port Ⅲ104, and the hydraulic oil in the rod chamber of the auxiliary hydraulic oil cylinder 10 is connected to the annular oil return passage Ⅱ103 through the connecting port Ⅱ106. The oil return port Ⅰ84 of the main hydraulic oil cylinder 8 is connected to the hydraulic oil tank 4 through the oil return line 6, and the oil return port Ⅱ88 is connected to the oil return port Ⅲ104 through the oil return line 6.

[0023] The rod ends (upper ends in the figure) of the main hydraulic cylinder 8 and the auxiliary hydraulic cylinder 10 are hinged on the balance beam 2, and the rodless ends (lower ends in the figure) are hinged on the base 7 of the vibrating screen. When the screen box angle needs to be adjusted, since the base 7 is fixed, the balance beam 2 drives the entire screen box 3 to move up and down under the joint action of the main hydraulic cylinder 8 and the auxiliary hydraulic cylinder 10, so that the screen box 3 is adjusted to the required angle.

[0024] Preferably, a pipeline groove 9 is provided below the guide plate at the front end of the screen box 3, and the oil supply pipeline 5 and the oil return pipeline 6 between the main hydraulic cylinder 8 and the auxiliary hydraulic cylinder 10 are installed in the pipeline groove 9. The pipeline groove 9 is a rectangular steel pipe or a steel plate bent into a C-shaped, rectangular, wavy shape composed of two triangles or other regular or irregular shapes. The pipeline groove 9 is preferably made of a steel plate bent into a C-shaped bending part or a rectangular steel pipe.

[0025] It should be noted that the oil supply pipeline 5 and the oil return pipeline 6 preferably use hydraulic hoses, and other high-pressure pipelines may also be used, and this embodiment does not impose specific restrictions on them.

[0026] The working principle of the utility model is that when the angle of the vibrating screen box needs to be adjusted, the hand pump 1 is operated, and the hydraulic oil enters the oil supply port Ⅰ85 of the main hydraulic cylinder 8 through the oil supply pipeline 5, and at the same time provides high-pressure oil to the piston rod Ⅰ81 and the auxiliary hydraulic cylinder. The hydraulic oil in the rod cavity of the auxiliary hydraulic cylinder 10 is returned to the hydraulic oil tank 4 through the connecting port Ⅱ106, the annular oil return channel Ⅱ103, the oil return port Ⅲ104, the oil return port Ⅱ88, the annular oil return channel Ⅰ83 and the oil return port Ⅰ84 under the action of the piston rod Ⅱ101. The above mechanism ensures the synchronous lifting and lowering of the main hydraulic cylinder 8 and the auxiliary hydraulic cylinder 10.

[0027] In summary, this embodiment connects the main hydraulic cylinder 8 and the auxiliary hydraulic cylinder 10 in series by providing a three-way main cylinder oil supply port and mutually connected oil return port I84 and oil return port II85 in the cylinder body 82 of the main hydraulic cylinder 8, thereby accurately realizing the synchronous lifting and lowering of the two hydraulic cylinders, and always keeping the screen flush during the adjustment process, fundamentally solving the technical problem of mud deviation caused by the lack of synchronization between the two hydraulic cylinders in the prior art, improving the screening efficiency, and reducing the number of leakage points. It is easy to use and maintain on site, safe and reliable, simple in structure, and low in cost.

[0028] The above is a detailed introduction to a vibration screen box synchronous adjustment device provided by the utility model. Specific examples are used in this article to illustrate the technical principles and implementation methods of the utility model. The above embodiments are only used to help understand the method of the utility model and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A synchronous adjustment device for a vibrating screen box, comprising two hydraulic cylinders arranged on both sides of the screen box, characterized in that: One of the hydraulic cylinders is the main hydraulic cylinder, and the other is the auxiliary hydraulic cylinder; A three-way main cylinder oil supply port is provided inside the cylinder body I of the main hydraulic oil cylinder. One way of the main cylinder oil supply port provides high-pressure oil to the piston rod I, and the other way of the main cylinder oil supply port provides high-pressure oil to the auxiliary hydraulic oil cylinder through the oil supply pipeline; The main hydraulic cylinder has a cylinder body I with an oil return port I and an oil return port II that are interconnected, and the auxiliary hydraulic cylinder has an oil return port III on its cylinder body II. The oil return port I of the main hydraulic cylinder is connected to the hydraulic oil tank through an oil return pipeline, and the oil return port II is connected to the oil return port III through an oil return pipeline.

2. A vibrating screen box synchronous adjustment device according to claim 1, characterized in that: The hydraulic oil tank is installed on the balance beam on the same side as the main hydraulic oil cylinder, and a hand pump is installed on the top of the hydraulic oil tank.

3. A vibrating screen box synchronous adjustment device according to claim 2, characterized in that: The hydraulic oil tank is installed near the main hydraulic cylinder.

4. A vibrating screen box synchronous adjustment device according to claim 1, 2 or 3, characterized in that: A pipeline groove is provided below the guide plate at the front end of the screen box, and the oil supply pipeline and the oil return pipeline between the main hydraulic cylinder and the auxiliary hydraulic cylinder are both installed in the pipeline groove.

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