Pressure balancing device with multiple balancing cylinders

Abstract

A multi-balance-cylinder pressure balancing device comprises a balance cylinder support connected with an external press body, a plurality of balance cylinders installed on the balance cylinder support, and support arm connectors connected with piston rods of the balance cylinders through movable connectors. The balance cylinder support arm is connected with an external press sliding block, is in threaded fit with the support arm connector and is fastened together with the support arm connector through a locking nut, the plurality of air pockets are used for supplying steam to the balance cylinder, the main pipeline is used for connecting the air pockets together, one end of the balance cylinder connecting pipeline is connected with the main pipeline, and the other end of the balance cylinder connecting pipeline is connected with the balance cylinder. Synchronous movement of the multiple balance air cylinders and balanced stress of the sliding blocks are achieved, balanced operation of the press sliding blocks is guaranteed, gaps between the press sliding block guide rails are uniform, stability and precision of the sliding blocks are improved, operation is safe, and the service life of equipment is long. The device can be widely applied to the sliding block balancing device of the screw press.

Description

Technical Field

[0001] The present invention relates to a multi-balanced cylinder pressure equalization device, which can be widely applied to the slider balance device of a screw press. Background Art

[0002] With the increasing large-scale of screw presses, the weight of the press slider is getting heavier and the volume of the used balance cylinders is getting larger. In order to reduce the front and rear installation space of the balance cylinders, generally, multiple balance cylinders with relatively small cylinder diameters are used to solve this problem.

[0003] When multiple balance cylinders are used in a screw press, pressure equalization is crucial. The main function of the balance cylinders is to balance the weights of components such as the slider and the upper die, avoid impacts and wear between the moving components of the main drive during the operation of the press, and improve the running accuracy of the slider. In the existing multiple balance cylinder devices, it is impossible to ensure that the pressure in each balance cylinder is the same. The pressures of multiple balance cylinders are uneven, the forces on the slider are uneven, the operation is unstable, the slider is eccentrically loaded during operation, resulting in the inclination or jamming of the slider, endangering the press slider and the body guide rail, damaging the equipment, shortening the service life of the press, and directly affecting the operation safety of the press. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-balanced cylinder pressure equalization device that can achieve the synchronous movement of multiple balance cylinders, the balanced force on the slider, ensure the balanced operation of the press slider, the uniform gap between the press slider and the guide rail, improve the smoothness and accuracy of the slider, ensure safe operation, and have a long service life of the equipment.

[0005] To achieve the above purpose, the multi-balanced cylinder pressure equalization device of the present invention includes a balance cylinder bracket connected to the external press body, several balance cylinders installed on the balance cylinder bracket, a support arm joint connected to the piston rod of the balance cylinder through a movable joint, a balance cylinder support arm that is both connected to the external press slider and thread-mated with the support arm joint and fastened together by a locking nut, several air bags for supplying steam to the balance cylinders, a main pipeline connecting the air bags together, and a balance cylinder connecting pipeline with one end connected to the main pipeline and the other end connected to the balance cylinder.

[0006] In the multi-balanced cylinder pressure equalization device of the present invention, each air bag is connected through the main pipeline, and each balance cylinder is connected to the main pipeline through the balance cylinder connecting pipeline. In this way, each balance cylinder is communicated with the main pipeline, ensuring that the pressure in each balance cylinder is the same and ensuring the synchronous movement of the four balance cylinders.

[0007] In the multi-balanced cylinder pressure equalization device of the present invention, the number of the balance cylinders is 4.

[0008] The multi-balanced cylinder pressure equalization device of the present invention has 2 air receivers.

[0009] The multi-balanced cylinder pressure equalization device of the present invention uses four balanced cylinders to assist in guiding the movement track of the slider. When the equipment is working, a two-point guiding balance mechanism is adopted in the front and rear directions of the slider, achieving the purpose of uniform gap and high precision between the slider and the guide rail. Under the action of the four balanced cylinders, the slider ensures the parallelism between the bottom surface of the slider and the workbench surface and the perpendicularity requirement of the slider movement track to the workbench surface when there is a gap between the slider and the guide rail.

[0010] When the screw press slider moves downward, due to the existence of the weights of the slider and the die, the inertia during downward movement is very large. At any position within the slider stroke, the balanced cylinder generates an upward supporting force to balance the weights and movement inertia of the slider and the upper die, ensuring the smooth movement of the slider. When the screw press slider returns, the lifting force of the balanced cylinder is used to assist in driving the slider to quickly return to the upper limit position of the stroke.

[0011] For the multi-balanced cylinder pressure equalization device of the present invention, each air receiver is connected by a main pipeline, and each balanced cylinder is connected to the main pipeline through a balanced cylinder connection pipeline. In this way, each balanced cylinder is connected to the main pipeline, ensuring that the pressure in each balanced cylinder is the same and ensuring the synchronous movement of the four balanced cylinders. Therefore, the synchronous movement of multiple balanced cylinders is achieved.

[0012] The multi-balanced cylinder pressure equalization device of the present invention adopts a synchronous working structure of multiple balanced cylinders, with the slider being evenly stressed, ensuring the balanced operation of the press slider, uniform gap between the press slider and the guide rail, improving the smoothness and precision of the slider, eliminating the problem of slider jamming caused by eccentric loading of the equipment, ensuring safe operation, and having a long service life of the equipment.

[0013] The multi-balanced cylinder pressure equalization device of the present invention has the function of balancing the slider at any position within the slider stroke. The balance force has small fluctuations, balancing the weights of the slider and the upper die, avoiding the shaking of the press caused by the above weights, reducing the impact and wear of the stressed parts, and preventing accidents caused by the falling of the slider when the brake fails or the machine parts break, being safe and reliable.

[0014] In summary, the multi-balanced cylinder pressure equalization device of the present invention realizes the synchronous movement of multiple balanced cylinders, with the slider being evenly stressed, ensuring the balanced operation of the press slider, uniform gap between the press slider and the guide rail, improving the smoothness and precision of the slider, ensuring safe operation, and having a long service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following further describes the present invention in conjunction with the accompanying drawings and its embodiments.

[0016] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 the A-A sectional view in Figure 3 is a three-dimensional structural diagram of the present invention. Specific embodiments

[0017] In Figures 1 to 3 the multi-balanced cylinder pressure equalizing device of the present invention includes a balance cylinder bracket 1 connected to the body of an external press, several balance cylinders 2 installed on the balance cylinder bracket, an arm joint 5 connected to the piston rod 4 of the balance cylinder through a movable joint 3, a balance cylinder arm 7 that is both connected to the slider of the external press and threadedly engaged with the arm joint and fastened together by a locking nut 6, several air bags 8 for supplying steam to the balance cylinders, a main pipe 9 connecting the air bags together, and a balance cylinder connecting pipe 10 with one end connected to the main pipe and the other end connected to the balance cylinder.

[0018] In the multi-balanced cylinder pressure equalizing device of the present invention, each air bag is connected through the main pipe, and each balance cylinder is connected to the main pipe through the balance cylinder connecting pipe. In this way, each balance cylinder is in communication with the main pipe, ensuring that the pressure in each balance cylinder is the same and ensuring the synchronous movement of the four balance cylinders.

[0019] In the multi-balanced cylinder pressure equalizing device of the present invention, the number of the balance cylinders 2 is 4.

[0020] In the multi-balanced cylinder pressure equalizing device of the present invention, the number of the air bags 8 is 2.

[0021] In summary, only the preferred embodiments of the present invention have been described above. It should be noted that the present invention is not limited to the above specific embodiments, and the equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art, without departing from the scope of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A multi-balanced cylinder pressure equalization device, characterized in that, It includes a balance cylinder bracket connected to the external press body, several balance cylinders installed on the balance cylinder bracket, a support arm joint connected to the balance cylinder piston rod through a movable joint, a balance cylinder support arm that is both connected to the external press slider and thread - mated with the support arm joint and fastened together by a locking nut, several air bags for supplying steam to the balance cylinders, a main pipeline connecting the air bags together, and a balance cylinder connecting pipeline with one end connected to the main pipeline and the other end connected to the balance cylinder.

2. The multi-balanced cylinder pressure equalizing device according to claim 1, wherein Each air bag is connected through the main pipeline, and each balance cylinder is connected to the main pipeline through the balance cylinder connecting pipeline. In this way, each balance cylinder is in communication with the main pipeline, ensuring that the pressure in each balance cylinder is the same and ensuring the synchronous movement of the four balance cylinders.

3. The multi-balanced cylinder pressure equalization device according to claim 1, characterized in that, The number of the balance cylinders is 4.

4. The multi-balanced cylinder pressure equalizing device according to claim 1, characterized in that, The number of the air bags is 2.

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