CN111776977A - Synchronous oil cylinder - Google Patents

Abstract

The invention relates to the technical field of hydraulic systems, in particular to a synchronous oil cylinder; the adopted technical scheme is as follows: a synchronous oil cylinder comprises a cylinder body, wherein a first oil chamber and a second oil chamber which are the same in size are arranged in the cylinder body, a first piston is matched in the first oil chamber, a second piston is matched in the second oil chamber, and the first piston and the second piston are fixedly connected. When the hydraulic lifting device is used, the first piston and the second piston are driven to synchronously act by hydraulic oil, so that the quantity of the hydraulic oil output from the first oil cavity and the second oil cavity can be ensured to be the same, and the action synchronism of the two lifting hydraulic cylinders of the die carrier can be ensured; meanwhile, the telescopic control of the die carrier jacking hydraulic cylinder can be realized only by controlling the flow direction of hydraulic oil through the reversing valve, so that the hydraulic control device has the characteristics of simple structure, high synchronism, simplicity in control and high reliability.

Description

a synchronous cylinder

technical field

The invention relates to the technical field of hydraulic systems, in particular to a synchronous oil cylinder.

Background technique

With the rapid development of the construction industry, the height of the building is also rising. For high-rise buildings, the climbing platform formwork system or the top formwork system is mostly used. The climbing or top mold of the existing climbing mold adopts hydraulic cylinder to lift the mold base to move up. However, the climbing or top mold mold base system platform that is lifted by a single hydraulic cylinder has the problems of insufficient effective bearing capacity and poor stability, and cannot be used. Meet the requirements of the installation of the placing machine and the stacking of construction materials.

In order to solve the problems of insufficient effective bearing capacity and poor stability of the formwork lifted by a single hydraulic cylinder, the applicant proposes a formwork system with two hydraulic cylinders lifted simultaneously. However, the double hydraulic cylinder jacking mold base has extremely high requirements on the synchronization of the cylinder movements. If the synchronization is poor, the model will tilt and damage the mold base, climbing guide rails, buildings, etc., and even cause serious safety accidents such as mold base collapse. . If the diverter valve (synchronization valve) is used with low synchronization accuracy, it is difficult to ensure the synchronization of the two hydraulic cylinders; if the servo valve and electro-hydraulic proportional valve are used for closed-loop control, although higher synchronization accuracy can be obtained, the control system is complex and the cost is high. , Low reliability.

SUMMARY OF THE INVENTION

Aiming at the above technical problems of low reliability and poor synchronicity of the synchronous control of the existing hydraulic cylinders, the present invention provides a synchronous oil cylinder, which can be used to control the lifting hydraulic cylinders of the mold base, so as to ensure the synchronization of the movements of the lifting hydraulic cylinders of the mold base. It has the characteristics of high synchronization, simple control and high reliability.

The present invention is achieved through the following technical solutions:

A synchronizing oil cylinder includes a cylinder body, the cylinder body is provided with a first oil cavity and a second oil cavity of the same size, a first piston is fitted in the first oil cavity, and a second oil cavity is fitted in the second oil cavity. A second piston is fitted, and the first piston and the second piston are fixedly connected.

In the present invention, a first oil chamber and a second oil chamber with the same size are arranged in the same cylinder, and the first piston and the second piston in the same cylinder are fixedly connected; when in use, the oil inlet pipeline is connected with the first oil chamber and the second oil chamber. The oil inlet end of the oil chamber is connected, the oil outlet end of the first oil chamber is connected with the oil inlet end of one lifting hydraulic cylinder of the mold base, and the oil outlet end of the second oil chamber is connected with the oil inlet of another lifting hydraulic cylinder of the mold frame end.

The hydraulic control module supplies oil to the first oil chamber and the second oil chamber at the same time, and the hydraulic oil drives the first piston and the second piston to act synchronously, which can ensure the output of hydraulic oil from the first oil chamber and the second oil chamber. In order to ensure the synchronization of the movements of the two lifting hydraulic cylinders of the mold base, it has the characteristics of high synchronization and can prevent the potential safety hazards caused by inconsistent movements of the two lifting hydraulic cylinders of the mold base.

As for the telescopic control of the hydraulic cylinder of the mold base, it can be realized only by controlling the flow direction of the hydraulic oil through the reversing valve, so the control is simple. And the synchronous action of the two jacking hydraulic cylinders of the mold base is realized by the present invention, only an element is added to the existing hydraulic jacking system, and the control is also controlled by the original reversing valve, so the reliability is high and can ensure Building construction safety.

Preferably, the first piston and the second piston are arranged concentrically to ensure that the forces of the first piston and the second piston are balanced, to prevent the first piston and/or the second piston from being deflected during the movement, so as to ensure that the first oil The same amount of hydraulic oil output from the cavity and the second oil cavity can also prevent the first piston and/or the second piston from being stuck in the cylinder.

Further, the end of the first piston away from the second piston is provided with a first piston rod, and the first piston rod is slidably connected to the end of the cylinder where the first oil cavity is provided; the second piston is provided with a second piston One end of the second piston rod is fixedly connected with the first piston, and the other end of the second piston rod is slidably connected with the other end of the cylinder. In order to provide radial support force to the first piston rod and the second piston rod through the cylinder body, the force balance of the first piston and the second piston is further ensured, and then the synchronization and reliability of the synchronizing oil cylinder are ensured.

As a specific embodiment of the oil inlet of the oil cylinder, the cylinder body is further provided with an oil inlet portion, and the oil inlet portion is provided with an oil inlet port, and the oil inlet port is connected to the oil inlet of the first oil chamber and the second oil chamber. end connection. In order to supply oil to the first oil chamber and the second oil chamber through a single oil inlet, the pipeline connection of the synchronous oil cylinder is simplified.

Further, the oil inlet part is also provided with an oil inlet series interface, and the oil inlet series interface is connected with the oil inlet port. Compared with supplying oil to each synchronous cylinder through several pipelines, it can not only simplify the layout of hydraulic pipelines, but also ensure the synchronism of the climbing of each formwork.

Further, the oil inlet part is provided with a series connection cavity, the oil inlet series interface and the oil inlet port are both arranged on the side wall of the series connection cavity, and the oil inlet ends of the first oil cavity and the second oil cavity are connected with each other through the damping channel. The tandem chamber communicates. When the hydraulic oil enters the series connection cavity, since the damping channel has a certain damping, most of the hydraulic oil entering the series connection chamber of the previous synchronous oil cylinder enters the series connection cavity of the next synchronous oil cylinder directly through the oil inlet series interface. Until the inlet ends of all the synchronizing cylinders connected in series are filled with hydraulic oil, this ensures that all the mold bases in the mold system with multiple mold bases can climb synchronously.

In order to facilitate the processing of the series connection cavity, a side wall of the series connection cavity is screwed with a first sealing screw, one end of the first sealing screw is located in the series connection cavity, and the other end of the first sealing screw is located outside the side wall of the oil inlet. That is, when processing the series connection cavity, a blind hole is directly processed on the side wall of the oil inlet, and then the sealing thread is processed at the end of the blind hole, and then the first sealing screw is connected with the sealing thread to form the series connection chamber.

As a specific embodiment in which the series connection chamber communicates with the oil inlet ends of the first oil chamber and the second oil chamber, the oil inlet portion is further provided with a connection chamber, and the connection chamber is used to communicate the first oil chamber and the second oil chamber The oil inlet end of the connecting cavity is communicated with the series connecting cavity through the damping channel.

Similarly, in order to facilitate the processing of the connecting cavity, a second sealing screw is screwed on one side wall of the connecting cavity, one end of the second sealing screw is located in the connecting cavity, and the other end of the second sealing screw is located outside the side wall of the oil inlet part. .

Preferably, the oil inlet part is further provided with an adjustment nut, and the adjustment nut is used to adjust the damping size of the damping channel to meet the synchronism requirements of the synchronous oil cylinder systems with different serial numbers.

Beneficial effects of the present invention:

1. The present invention supplies oil to the first oil chamber and the second oil chamber simultaneously through the hydraulic control module, and the hydraulic oil drives the first piston and the second piston to act synchronously, which can ensure the output from the first oil chamber and the second oil chamber. The amount of hydraulic oil is the same to ensure the synchronization of the movements of the two lifting hydraulic cylinders of the mold base.

2. For the telescopic control of the hydraulic cylinder of the die set, it is only necessary to control the flow direction of the hydraulic oil through the reversing valve, so the control is simple.

3. The synchronous action of the two jacking hydraulic cylinders of the mold base is realized by the present invention, only an element is added to the existing hydraulic jacking system, and the control is also controlled by the original reversing valve, so the reliability is high and it can be Ensure building construction safety.

4. The oil inlet series interface is connected with the oil inlet, and the oil inlet ends of multiple synchronous oil cylinders are connected in series through the oil inlet series interface, which can meet the synchronous lifting requirements of multiple mold bases in the entire mold base system; Several pipelines supply oil to each synchronous cylinder, which not only simplifies the layout of hydraulic pipelines, but also ensures the synchronism of the climbing of each formwork.

5. The oil inlet ends of the first oil chamber and the second oil chamber are connected to the series connection chamber through the damping channel, and the hydraulic oil enters the series connection chamber. Since the damping channel has a certain damping, the hydraulic pressure entering the series connection chamber of the previous synchronous oil cylinder Most of the hydraulic oil directly enters the serial cavity of the next synchronous cylinder through the oil inlet serial port, thus ensuring that all mold bases in a mold system with multiple mold bases can climb synchronously.

6. Adjust the damping size of the damping channel by adjusting the nut to meet the synchronism requirements of the synchronous oil cylinder system with different serial numbers.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the embodiments of the present invention, and constitute a part of the present application, and do not constitute limitations to the embodiments of the present invention. In the attached image:

Fig. 1 is the front view of the present invention;

Fig. 2 is the A-A plane sectional view of Fig. 1;

Figure 3 is a rear view of the present invention.

The marks in the attached drawings and the corresponding parts names:

1-cylinder, 2-first oil chamber, 3-second oil chamber, 4-first piston, 5-second piston, 6-first piston rod, 7-second piston rod, 8-oil inlet , 9- oil inlet, 10- oil inlet series interface, 11- series chamber, 12- damping channel, 13- first sealing screw, 14- connecting chamber, 15- second sealing screw, 16- adjusting nut, 17- The first oil outlet, 18 - the second oil outlet, 19 - the oil outlet.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and the accompanying drawings. as a limitation of the present invention.

Example 1

A synchronous oil cylinder includes a cylinder block 1, wherein a first oil chamber 2 and a second oil chamber 3 of the same size are provided in the cylinder block 1, and a first piston 4 is fitted in the first oil chamber 2, so the A second piston 5 is fitted in the second oil chamber 3 , and the first piston 4 and the second piston 5 are fixedly connected.

Preferably, the first piston 4 and the second piston 5 are arranged concentrically to ensure that the first piston 4 and the second piston 5 are force-balanced and prevent the first piston 4 and/or the second piston 5 from deflecting during movement , so as to ensure the same amount of hydraulic oil output from the first oil chamber 2 and the second oil chamber 3 , and also to prevent the first piston 4 and/or the second piston 5 from being stuck in the cylinder body 1 .

Further, the end of the first piston 4 away from the second piston 5 is provided with a first piston rod 6, and the first piston rod 6 is slidably connected to the end of the cylinder 1 where the first oil chamber 2 is provided; The piston 5 is provided with a second piston rod 7 , one end of the second piston rod 7 is fixedly connected with the first piston 4 , and the other end of the second piston rod 7 is slidably connected with the other end of the cylinder 1 . In order to provide radial support force to the first piston rod 6 and the second piston rod 7 through the cylinder block 1, the force balance of the first piston 4 and the second piston 5 is further ensured, thereby ensuring the synchronization and reliability of the synchronizing oil cylinder.

As a specific embodiment of the oil inlet of the oil cylinder, the cylinder block 1 is further provided with an oil inlet portion 8, and the oil inlet portion 8 is provided with an oil inlet port 9, and the oil inlet port 9 is connected with the first oil chamber 2 and the second oil chamber 2. The oil inlet ends of the two oil chambers 3 communicate with each other. In order to supply oil to the first oil chamber 2 and the second oil chamber 3 through a single oil inlet 9, the pipeline connection of the synchronous oil cylinder is simplified.

In order to facilitate the connection of the oil outlet end of the oil cylinder and ensure sufficient strength of the cylinder block 1, the cylinder block 1 is also provided with an oil outlet portion 19, and the oil outlet portion 19 is provided with a first oil outlet 17 and a second oil outlet. The oil port 18 , the first oil outlet 17 communicates with the first oil chamber 2 , and the second oil outlet 18 communicates with the second oil chamber 3 .

In the present invention, a first oil chamber 2 and a second oil chamber 3 of the same size are arranged in the same cylinder block 1, and the first piston 4 and the second piston 5 in the same cylinder are fixedly connected; The oil chamber 2 is connected with the oil inlet end of the second oil chamber 3, the oil outlet end of the first oil chamber 2 is connected with the oil inlet end of a lifting hydraulic cylinder of the mold base, and the oil outlet end of the second oil chamber 3 is connected with the oil inlet end of the mold frame. The other lifts the oil inlet end of the hydraulic cylinder.

The first oil chamber 2 and the second oil chamber 3 are simultaneously supplied with oil through the hydraulic control module (including hydraulic pump, filter, pressure regulating valve, and reversing valve), and the first piston 4 and the second piston 5 are driven by hydraulic oil to synchronize It can ensure the same amount of hydraulic oil output from the first oil chamber 2 and the second oil chamber 3, so as to ensure the synchronization of the movements of the two lifting hydraulic cylinders of the mold base. It has the characteristics of high synchronization and can prevent the The safety hazard caused by the inconsistent movements of the two lifting hydraulic cylinders of the frame.

As for the telescopic control of the hydraulic cylinder of the mold base, it can be realized only by controlling the flow direction of the hydraulic oil through the reversing valve, so the control is simple. And the synchronous action of the two jacking hydraulic cylinders of the mold base is realized by the present invention, only one element is added to the existing hydraulic jacking system, and the control is also controlled by the original reversing valve, so the reliability is high and can ensure Building construction safety.

Example 2

Based on Embodiment 1, the oil inlet part 8 is further provided with an oil inlet series port 10, the oil inlet series port 10 is communicated with the oil inlet port 9, and the oil inlet ends of a plurality of synchronous oil cylinders are connected in series through the oil inlet series port 10 Together, it can meet the synchronous lifting requirements of multiple mold bases in the entire mold base system; compared with supplying oil to each synchronous cylinder through several pipelines, it not only simplifies the layout of hydraulic pipelines, but also ensures that each mold base can climb up. synchronicity.

Further, the oil inlet part 8 is provided with a series connection cavity 11, the oil inlet series connection port 10 and the oil inlet port 9 are both arranged on the side wall of the series connection cavity 11, and the oil inlet of the first oil cavity and the second oil cavity is The ends communicate with the tandem chamber 11 through the damping channel 12 . When the hydraulic oil enters the series connection chamber 11, since the damping channel 12 has a certain damping, most of the hydraulic oil entering the series connection chamber 11 of the previous synchronizing cylinder directly enters the next synchronizing cylinder through the oil inlet series interface 10. The tandem cavity 11 is filled with hydraulic oil until the oil inlet ends of all the synchronizing oil cylinders connected in series, thereby ensuring that all the die sets in the die system with multiple die sets can climb synchronously.

In order to facilitate the processing of the series connection cavity 11, a side wall of the series connection cavity 11 is screwed with a first sealing screw 13, one end of the first sealing screw 13 is located in the series connection cavity 11, and the other end of the first sealing screw 13 is located in the oil inlet. part 8 outside the side wall. That is, when processing the series connection cavity 11 , a blind hole is directly processed on the side wall of the oil inlet, and then the sealing thread is processed at the end of the blind hole, and then the first sealing screw 13 is connected with the sealing thread to form the series connection chamber 11 .

As a specific embodiment in which the series connection chamber 11 communicates with the oil inlet ends of the first oil chamber and the second oil chamber, the oil inlet portion 8 is further provided with a connection chamber 14, and the connection chamber 14 is used to communicate the first oil chamber and the second oil chamber. At the oil inlet end of the second oil chamber, the connection chamber 14 communicates with the series connection chamber 11 through the damping passage 12 .

Similarly, in order to facilitate the processing of the connection cavity 14, a side wall of the connection cavity 14 is screwed with a second sealing screw 15, one end of the second sealing screw 15 is located in the connection cavity 14, and the other end of the second sealing screw 15 is located in the connection cavity 14. The oil inlet part 8 is outside the side wall.

Preferably, the oil inlet portion 8 is further provided with an adjusting nut 16, and the adjusting nut 16 is used to adjust the damping size of the damping passage 12 to meet the synchronism requirements of the synchronizing oil cylinder systems with different serial numbers.

It can be understood that, in a formwork system with multiple formwork, the climbing of a single formwork is performed by a single synchronous cylinder; and for the case where multiple formwork is required to be climbed synchronously, all the formwork climbing cylinders that need to be synchronously climbed are put into the system. The oil ends are connected in series through the oil inlet series connection interface 10 (the oil outlet end is directly connected to the reversing valve), and then the adjusting nut 16 is adjusted so that the damping of all the damping passages 12 on the synchronizing oil cylinders connected in series is along the inlet. The direction of hydraulic oil flow at the oil end decreases sequentially.

The specific embodiments described above further describe the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A synchronous oil cylinder, comprising a cylinder body (1), characterized in that, a first oil chamber (2) and a second oil chamber (3) of the same size are provided in the cylinder body (1), A first piston (4) is fitted in an oil chamber (2), a second piston (5) is fitted in the second oil chamber (3), the first piston (4) and the second piston ( 5) Fixed connection. 2 . The synchronizing oil cylinder according to claim 1 , wherein the first piston ( 4 ) and the second piston ( 5 ) are arranged concentrically. 3 . 3. The synchronizing oil cylinder according to claim 2, characterized in that, a first piston rod (6) is provided at the end of the first piston (4) away from the second piston (5), and the first piston rod ( 6) slidingly connected with the end of the cylinder block (1) where the first oil chamber (2) is arranged; The second piston (5) is provided with a second piston rod (7), one end of the second piston rod (7) is fixedly connected with the first piston (4), and the other end of the second piston rod (7) is connected with the first piston (4). The other end of the cylinder block (1) is slidably connected. 4. The synchronous oil cylinder according to claim 1, characterized in that, the cylinder body is further provided with an oil inlet (8), and an oil inlet (9) is arranged in the oil inlet (8), and the The oil inlet (9) is communicated with the oil inlet ends of the first oil chamber (2) and the second oil chamber (3). 5. The synchronous oil cylinder according to claim 4, characterized in that, the oil inlet (8) is further provided with an oil inlet series port (10), and the oil inlet series port (10) is connected to an oil inlet port (9). ) is connected. 6. The synchronous oil cylinder according to claim 5, characterized in that, the oil inlet portion (8) is provided with a series connection cavity (11), and the oil inlet series port (10) and the oil inlet port (9) are both provided with On the side wall of the series connection chamber (11), the oil inlet ends of the first oil chamber (2) and the second oil chamber (3) communicate with the series connection chamber (11) through a damping channel (12). 7. The synchronizing oil cylinder according to claim 6, characterized in that a first sealing screw (13) is screwed on a side wall of the series connection chamber (11), and one end of the first sealing screw (13) is located in the series connection chamber In (11), the other end of the first sealing screw (13) is located outside the side wall of the oil inlet (8). 8. The synchronizing oil cylinder according to claim 6, characterized in that, the oil inlet (8) is further provided with a connecting cavity (14), and the connecting cavity (14) is used to communicate with the first oil cavity (2) and the oil inlet end of the second oil chamber (3), the connection chamber (14) communicates with the series connection chamber (11) through the damping passage (12). 9 . The synchronizing oil cylinder according to claim 7 , wherein a second sealing screw ( 15 ) is screwed on a side wall of the connecting cavity ( 14 ), and one end of the second sealing screw ( 15 ) is located in the connecting cavity. 10 . In (14), the other end of the second sealing screw (15) is located outside the side wall of the oil inlet (8). 10. The synchronizing oil cylinder according to claim 6, characterized in that, the oil inlet portion (8) is further provided with an adjusting nut (16), and the adjusting nut (16) is used to adjust the damping of the damping passage (12). size.

Images