Series synchronous double-cylinder control system

Abstract

The series synchronous double-cylinder control system comprises a valve body, a first oil way, a second oil way, a third oil way and a fourth oil way are formed in the valve body, the two ends of the first oil way are communicated with a port A formed in the valve body, a first two-position two-way electromagnetic normally-closed valve and a main cylinder lower cavity port respectively, and the other end of the first oil way is communicated with a second two-position two-way electromagnetic normally-closed valve. The second oil way is communicated with the first two-position two-way electromagnetic normally-closed valve, the two-position two-way electromagnetic normally-open valve and an auxiliary cylinder lower cavity opening formed in the valve body, and the third oil way is communicated with a port B formed in the valve body and an auxiliary cylinder upper cavity opening. A third oil way, a second two-position two-way electromagnetic normally-closed valve, a two-position two-way electromagnetic normally-open valve and a main cylinder upper cavity opening formed in a valve body are communicated with the fourth oil way, the valve body is communicated with a synchronous double-cylinder assembly, the principle is simple, the structure is compact, operation is easy, and a worker can conveniently switch and adjust the parallel-bar synchronous control oil way and the horizontal-bar independent control oil way according to the situation.

Description

Technical Field

[0001] The utility model belongs to the technical field of series synchronous double-cylinder control and relates to a series synchronous double-cylinder control system. Background Art

[0002] The structure of the series synchronous cylinder is simple and the synchronization accuracy is high. However, after a long period of use, the synchronization accuracy will gradually deteriorate due to the leakage of hydraulic oil in the closed chamber; or some working conditions require the synchronization of two cylinders, and any one of the cylinders needs to work alone. In this case, the simple series synchronization circuit system cannot meet this working condition.

[0003] Therefore, in order to overcome the above shortcomings, we need a hydraulic system with simple principle, compact structure, easy processing and production, stable performance and beautiful appearance, which can not only enable the two cylinders to work synchronously, but also enable any one of the cylinders to work alone. Therefore, it is necessary to design a series synchronous two-cylinder control system to solve the above problems. Utility Model Content

[0004] In view of the above problems, in order to overcome the defects of the prior art, the utility model proposes a series synchronous double-cylinder control system. The purpose of the utility model is: simple principle, compact structure, easy operation, and convenient for staff to switch and adjust the double-bar synchronous control and single-bar separate control oil circuit according to the situation.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: the utility model includes a valve body, in which a first oil circuit, a second oil circuit, a third oil circuit and a fourth oil circuit are opened, and the two ends of the first oil circuit are respectively connected to the A port opened on the valve body, the first two-position two-way electromagnetic normally closed valve and the lower cavity port of the main cylinder, the second oil circuit is connected to the first two-position two-way electromagnetic normally closed valve, the two-position two-way electromagnetic normally open valve and the lower cavity port of the auxiliary cylinder opened on the valve body, the third oil circuit is connected to the B port opened on the valve body and the upper cavity port of the auxiliary cylinder, the fourth oil circuit is connected to the third oil circuit, the second two-position two-way electromagnetic normally closed valve, the two-position two-way electromagnetic normally open valve and the upper cavity port of the main cylinder opened on the valve body, and the valve body is connected to a synchronous dual-cylinder assembly.

[0006] Preferably, the synchronous dual-cylinder assembly includes a master cylinder and a slave cylinder, the oil inlet end of the master cylinder is connected to the lower cavity port of the master cylinder, the oil outlet end of the master cylinder is connected to the upper cavity port of the master cylinder, the oil inlet end of the slave cylinder is connected to the lower cavity port of the slave cylinder, and the oil outlet end of the slave cylinder is connected to the upper cavity port of the slave cylinder.

[0007] Preferably, the first two-position two-way electromagnetic normally closed valve, the second two-position two-way electromagnetic normally closed valve and the two-position two-way electromagnetic normally open valve are all threadedly connected to the valve body.

[0008] Compared with the prior art, the utility model has the following beneficial effects:

[0009] The utility model forms a structure for synchronous control of dual cylinders and switching between independent operation of a single cylinder through the mutual cooperation of the valve body, the first oil circuit, the second oil circuit, the third oil circuit, the fourth oil circuit, the first two-position two-way electromagnetic normally closed valve, the second two-position two-way electromagnetic normally closed valve, and the two-position two-way electromagnetic normally open valve, which is convenient for switching the cylinders according to the situation, has a simple principle, is easy to operate, and has a compact overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the front cross-sectional view of the structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the series synchronous double-cylinder control circuit of the utility model.

[0012] Figure markings: 1-valve body, 11-first oil circuit, 12-second oil circuit, 13-third oil circuit, 14-fourth oil circuit, 15-A port, 16-lower cavity port of master cylinder, 17-lower cavity port of slave cylinder, 18-upper cavity port of slave cylinder, 19-upper cavity port of master cylinder, 20-first two-position two-way solenoid normally closed valve, 21-two-position two-way solenoid normally open valve, 22-second two-position two-way solenoid normally closed valve, 23-master cylinder, 24-slave cylinder, 25-three-position four-way solenoid reversing valve, 26-overflow valve, 34-B port. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] The following is combined with Figure 1-2 The specific implementation modes of the present utility model are further described in detail.

[0015] In this embodiment, by Figure 1-2As shown, the utility model includes a valve body 1, in which a first oil circuit 11, a second oil circuit 12, a third oil circuit 13 and a fourth oil circuit 14 are provided, and two ends of the first oil circuit 11 are respectively connected to an A port 15, a first two-position two-way electromagnetic normally closed valve 20 and a lower cavity port 16 of a main cylinder provided on the valve body 1, the second oil circuit 12 is connected to a first two-position two-way electromagnetic normally closed valve 20, a two-position two-way electromagnetic normally open valve 21 and a lower cavity port 17 of a secondary cylinder provided on the valve body 1, the third oil circuit 13 is connected to a B port 34 provided on the valve body 1 and an upper cavity port 18 of the secondary cylinder, and the fourth oil circuit 14 is connected in series to the third oil circuit 13, a second two-position two-way electromagnetic normally closed valve 22, a two-position two-way electromagnetic normally open valve 21 and The upper cavity port 19 of the master cylinder is opened on the valve body 1, and the valve body 1 is connected to the synchronous double-cylinder assembly. The flow direction of the oil circuit in the valve body 1 and the working state of the synchronous double-cylinder assembly are controlled by controlling the switch of the first two-position two-way electromagnetic normally closed valve 20, the second two-position two-way electromagnetic normally closed valve 22 and a two-position two-way electromagnetic normally open valve 21. The first two-position two-way electromagnetic normally closed valve 20, the second two-position two-way electromagnetic normally closed valve 22 and the two-position two-way electromagnetic normally open valve 21 are all connected to the external industrial control computer through wires, and the two-position two-way electromagnetic normally open valve 21 adopts the model DHF08-227, and the first two-position two-way electromagnetic normally closed valve 20 and the second two-position two-way electromagnetic normally closed valve 22 adopt the model DHF08-228.

[0016] In this embodiment, by Figure 1-2 As shown, the synchronous dual-cylinder assembly includes a main cylinder 23 and a secondary cylinder 24, the main cylinder oil inlet end 27 is connected to the lower cavity port 16 of the main cylinder 23, the main cylinder oil outlet end 28 is connected to the upper cavity port 19 of the main cylinder 23, the secondary cylinder oil inlet end 29 is connected to the lower cavity port 17 of the secondary cylinder 24, and the secondary cylinder oil outlet end 30 is connected to the upper cavity port 18 of the secondary cylinder 24.

[0017] In this embodiment, by Figure 1-2 As shown, the first two-position two-way electromagnetic normally closed valve 20 , the second two-position two-way electromagnetic normally closed valve 22 and the two-position two-way electromagnetic normally open valve 21 are all threadedly connected to the valve body 1 .

[0018] Working principle: First, the oil inlet and outlet of port A 15 and port B 34 are controlled externally;

[0019] 1. When the master cylinder 23 and the slave cylinder 24 need to work synchronously, the A port 15 enters the oil, the B port 34 returns the oil (or vice versa), the first two-position two-way electromagnetic normally closed valve 20, the second two-position two-way electromagnetic normally closed valve 22 and the two-position two-way electromagnetic normally open valve 21 do not work. At this time, the hydraulic oil provided by the oil pump enters from the lower cavity port 16 of the master cylinder, and then flows out from the upper cavity port 19 of the master cylinder, enters the lower cavity port 17 of the slave cylinder 24 through the two-position two-way electromagnetic normally open valve 21, and the hydraulic oil in the upper cavity port 18 of the slave cylinder 24 enters the oil tank through the B port 34, forming a synchronous circuit.

[0020] 2. When the master cylinder 23 needs to work alone, oil enters from port A 15 and returns from port B 34 (or vice versa), the two-position two-way electromagnetic normally open valve 21 is powered on and closed, the second two-position two-way electromagnetic normally closed valve 22 is powered on and opened, and the first two-position two-way electromagnetic normally closed valve 20 is in a non-powered closed state. At this time, the hydraulic oil provided by the oil pump enters from the lower cavity port 16 of the master cylinder, then flows out from the upper cavity port 19 of the master cylinder, enters port B 34 through the second two-position two-way electromagnetic normally closed valve 22, and then returns to the oil tank. At this time, the auxiliary cylinder 24 will not move.

[0021] 3. When the auxiliary cylinder 24 needs to work alone, the oil enters from the A port 15 and returns from the B port 34 (or vice versa), the first two-position two-way electromagnetic normally closed valve 20 is powered on and opened, the two-position two-way electromagnetic normally open valve 21 is powered on and closed, and the second two-position two-way electromagnetic normally closed valve 22 is in a non-powered closed state. At this time, the hydraulic oil provided by the oil pump enters the lower cavity port 17 of the auxiliary cylinder through the first two-position two-way electromagnetic normally closed valve 20, and then flows out from the upper cavity port 18 of the auxiliary cylinder and returns to the oil tank through the B port 34. At this time, the main cylinder 23 will not move;

[0022] The above embodiment also includes a three-position four-way solenoid reversing valve connecting port A and port B, and the three-position four-way solenoid reversing valve is used to control the oil inlet and outlet of port A and port B. A first one-way valve is provided between port A and port B and the three-position four-way solenoid reversing valve. The inlet of the three-position four-way solenoid valve is connected to the hydraulic pump and the overflow valve through a second one-way valve. The hydraulic pump is connected to the motor, and the three-position four-way solenoid reversing valve is used to control the inlet and outlet oil circuits of port A and port B. Then, an oil circulation is formed through the hydraulic pump and the motor, and then the oil is sent to the three-position four-way solenoid reversing valve for circulation. During this period, the overflow valve protects the oil circuit, and automatically opens to control the oil flow if the oil flow is too large.

[0023] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A series synchronous double-cylinder control system, comprising a valve body, characterized in that: The valve body is provided with a first oil circuit, a second oil circuit, a third oil circuit and a fourth oil circuit, two ends of the first oil circuit are respectively connected to port A provided on the valve body, a first two-position two-way electromagnetic normally closed valve and a lower cavity port of the main cylinder, the second oil circuit is connected to the first two-position two-way electromagnetic normally closed valve, a two-position two-way electromagnetic normally open valve and a lower cavity port of the auxiliary cylinder provided on the valve body, the third oil circuit is connected to port B provided on the valve body and an upper cavity port of the auxiliary cylinder, the fourth oil circuit is connected to the third oil circuit, a second two-position two-way electromagnetic normally closed valve, a two-position two-way electromagnetic normally open valve and an upper cavity port of the main cylinder provided on the valve body, and the valve body is connected to a synchronous dual-cylinder assembly.

2. A series synchronous twin-cylinder control system according to claim 1, characterized in that: The synchronous dual-cylinder assembly includes a master cylinder and a slave cylinder, the oil inlet end of the master cylinder is connected to the lower cavity port of the master cylinder, the oil outlet end of the master cylinder is connected to the upper cavity port of the master cylinder, the oil inlet end of the slave cylinder is connected to the lower cavity port of the slave cylinder, and the oil outlet end of the slave cylinder is connected to the upper cavity port of the slave cylinder.

3. A series synchronous twin-cylinder control system according to claim 1, characterized in that: The first two-position two-way electromagnetic normally closed valve, the second two-position two-way electromagnetic normally closed valve and the two-position two-way electromagnetic normally open valve are all threadedly connected to the valve body.

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