Synchronous safety system of double-lifting-point plunger type cylinder

Abstract

The utility model discloses a double-lifting-point plunger type cylinder synchronous safety system which comprises an oil tank, a hydraulic pump motor set, a pressure regulating valve assembly, a control valve assembly, an oil filter set and a plunger type cylinder set. The hydraulic pump motor set comprises two hydraulic pump motors, oil suction ports of the hydraulic pump motors are connected with the oil tank, oil outlets of the hydraulic pump motors are connected with the pressure regulating valve assembly, and the pressure regulating valve assembly is connected with the control valve assembly. The control valve assembly is provided with an electromagnetic directional valve connected with the pressure regulating valve assembly through an oil inlet pipeline, a speed regulating valve group, an oil outlet interface and an oil return pipeline connected with an oil tank, the speed regulating valve group is divided into two paths, one path is a proportional speed regulating valve group, and the other path is a common speed regulating valve group; the problem that equipment operation is affected by unstable opening and closing pressure of the oil cylinder is solved, the oil cylinder gliding locking problem is solved, and the safety problem of rapid door closing of the equipment under the emergency working condition is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of a plunger cylinder pressure regulating control structure, in particular to a double-hanging-point plunger cylinder synchronous safety system. Background Art

[0002] The synchronization of equipment in water conservancy projects (such as double-lifting-point double-piston cylinders) is one of the key issues affecting the safe operation of equipment. In actual operation, there are always various asynchrony and instability problems with the equipment, which puts higher requirements on the design of the equipment system. Water conservancy projects are inevitably related to people's livelihood, so there are also special requirements for the timeliness and speed of the equipment's response under emergency conditions.

[0003] The existing synchronous design uses multiple throttle valves + multiple hydraulic check valves + electromagnetic ball valves and other valve components, which are complex in structure and require a large space, increasing the manufacturing cost (see attached Figure 2 );

[0004] Or use double speed regulating valve group + electromagnetic reversing valve + double one-way throttle valve, which has a complex structure and increases the design space, and the manufacturing cost is high (see attached Figure 3 ). Therefore, it needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a double-hanging-point plunger-cylinder synchronous safety system is provided.

[0006] The technical solution adopted by the utility model to solve the technical problem is: a double-hanging point plunger cylinder synchronous safety system, including an oil tank, a hydraulic pump motor group, a pressure regulating valve assembly, a control valve assembly, an oil filter group, and a plunger cylinder group;

[0007] The hydraulic pump motor group includes two hydraulic pump motors, the oil suction port of the hydraulic pump motor is connected to the oil tank through a low-pressure ball valve and a shock-absorbing joint assembly, the oil outlet of the hydraulic pump motor is connected to the pressure regulating valve assembly through a one-way valve and a high-pressure hose assembly, and the pressure regulating valve assembly is connected to the control valve assembly;

[0008] The low-pressure ball valve + shock-absorbing joint assembly is divided into two parts, which effectively reduces the vibration and noise generated by the operation of the equipment. The one-in-one-standby structure ensures the reliability of the system operation. The one-way valve + high-pressure hose assembly controls the flow direction of the oil, and the soft connection in the pipeline plays a role in reducing vibration. The one-in-one-standby structure ensures the reliability of the system operation.

[0009] The control valve assembly is provided with an electromagnetic reversing valve, a speed regulating valve group, an oil outlet interface, and an oil return pipeline connected to the oil tank through an oil inlet pipeline. The speed regulating valve group is divided into two paths, one is a proportional speed regulating valve group, and the other is a common speed regulating valve group. The proportional speed regulating valve group and the common speed regulating valve group are respectively connected to the plunger cylinder group through a hydraulically controlled one-way valve and from their respective corresponding oil outlet interfaces. A first pressure measuring joint is also installed at the oil outlet interface.

[0010] The above-mentioned pressure measuring joints are respectively arranged at two different oil ports and can be connected to external pressure gauges and relays, etc., to monitor the operating pressure of the equipment in real time and keep the equipment pressure within a certain range to ensure the safe operation of the system.

[0011] Furthermore, the oil filter group described in the utility model includes a high-pressure oil filter and an oil return filter. The high-pressure oil filter is arranged in the oil inlet pipeline, and the oil return filter is arranged in the oil return pipeline, which provides double protection for the cleanliness of the system oil, extends the service life of the valve parts, and ensures the stable operation of the equipment.

[0012] Furthermore, the pressure regulating valve assembly described in the utility model is also provided with a secondary pressure electromagnetic overflow valve and a second side pressure joint, which saves the installation space distance of the equipment.

[0013] The pressure measuring joint is connected to the external pressure transmitter and pressure gauge to monitor the equipment operating pressure in real time and keep the equipment pressure within a certain range to ensure the safe operation of the system;

[0014] The two-stage pressure electromagnetic relief valve realizes the different pressure value requirements when the system is opened and closed by reversing the reversing valves YV1 and YV2. Using different pressure controls when opening and closing the door can ensure the stability of equipment operation.

[0015] Furthermore, the plunger cylinder group of the utility model includes two independent plunger cylinders, and the two plunger cylinders are connected by a pipeline with a double ball valve, and the double ball valve is connected to the oil ports of the two plunger cylinder pipelines. Under normal working conditions, it is normally closed. In emergency closing conditions, the double ball valve is opened to achieve rapid door closing, and one valve is connected to achieve rapid oil return of the two cylinders at the same time. One-step operation achieves rapid response under emergency conditions and completes safety measures.

[0016] The beneficial effects of the utility model are as follows: the utility model overcomes the defects in the prior art and has the following advantages:

[0017] 1. Two speed regulating valve groups are set in the system to track the operation of the equipment in real time and control the inlet and outlet oil flow to achieve synchronous and safe operation of the equipment. The use of one proportional speed regulating valve group and one ordinary speed regulating valve control group can not only enable the two cylinders to achieve precise deviation correction and synchronization function, but also save production costs;

[0018] 2. The pressure regulating valve group with two-stage pressure is used to make the operation of the equipment more stable and reliable when opening and closing the door. The double hydraulic control one-way valve is used to form a hydraulic lock device, and the locking of the stroke in place prevents the oil cylinder from sliding down. The high-pressure oil filter and the return oil filter are set in the pipeline to double ensure the cleanliness of the oil, so that the valves in the system can work normally, extend the service life of the valves, and ensure the stable operation of the equipment;

[0019] 3. A double ball valve is connected between the two cylinder pipelines. One valve is connected and operated in one step. It is used as a safety measure for rapid oil return of the two cylinders under emergency conditions to achieve rapid door closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is an existing synchronous design structure diagram in the background technology;

[0023] Figure 3 It is another existing synchronous design structure diagram in the background technology.

[0024] Numbers in the figure: 1. Oil tank, 2. Hydraulic pump motor unit, 3. Pressure regulating valve assembly, 4. Control valve assembly, 5. Solenoid reversing valve, 6. Speed ​​regulating valve group, 7. Hydraulic control one-way valve, 8. First pressure measuring joint, 9. High-pressure oil filter, 10. Return oil filter, 11. Secondary pressure solenoid overflow valve, 12. Second side pressure joint, 13. Plunger cylinder, 14. Double ball valve. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0026] like Figure 1A double-hanging-point plunger-cylinder synchronous safety system shown in the figure comprises an oil tank 1, a hydraulic pump motor group 2, a pressure regulating valve assembly 3, a control valve assembly 4, an oil filter group, and a plunger cylinder group; the hydraulic pump motor group 2 comprises a two-way hydraulic pump motor, the oil suction port of the hydraulic pump motor is connected to the oil tank 1 through a low-pressure ball valve and a shock-absorbing joint assembly, the oil outlet of the hydraulic pump motor is connected to the pressure regulating valve assembly 3 through a one-way valve and a high-pressure hose assembly, and the pressure regulating valve assembly 3 is connected to the control valve assembly 4; the control valve assembly 4 is provided with an electromagnetic reversing valve 5 connected to the pressure regulating valve assembly 3 through an oil inlet pipeline, a speed regulating valve group 6, an oil outlet interface, and an oil return pipeline connected to the oil tank 1, the speed regulating valve group 6 is divided into two routes, one is a proportional speed regulating valve group, and the other is a common speed regulating valve group, the proportional speed regulating valve group and the common speed regulating valve group are respectively connected to the plunger cylinder group through a hydraulically controlled one-way valve 7 and from their respective corresponding oil outlet interfaces, and a first pressure measuring joint 8 is also installed at the oil outlet interface.

[0027] Among them, the oil filter group includes a high-pressure oil filter 9 and an oil return filter 10. The high-pressure oil filter 9 is arranged in the oil inlet pipeline, and the oil return filter 10 is arranged in the oil return pipeline, which provides double protection for the cleanliness of the system oil, extends the service life of the valve parts, and ensures the stable operation of the equipment.

[0028] The pressure regulating valve assembly 3 is also provided with a secondary pressure electromagnetic relief valve 11 and a second side pressure joint 12, which saves the installation space distance of the equipment.

[0029] The plunger cylinder group includes two independent plunger cylinders 13, and the two plunger cylinders 13 are connected by a pipeline with a double ball valve 14. The double ball valve connects the oil ports of the two plunger cylinder pipelines. Under normal working conditions, it is normally closed. In emergency closing conditions, the double ball valve is opened to achieve rapid door closing. One valve is connected to achieve rapid oil return of the two cylinders at the same time. One-step operation achieves rapid response under emergency conditions and completes safety measures.

[0030] The inlet and outlet oil circuits between the control valve group and the plunger cylinder are both operated with a single pipeline. Considering its bidirectionality, hydraulically controlled one-way valves are installed at the two oil ports to connect them with each other, controlling the oil flow direction to lock and prevent the cylinder from sliding down. The control port is supplied with pressure through the reversal of the electromagnetic reversing valve, and the two hydraulically controlled one-way valve channels are opened to realize the closing action of the cylinder. The proportional speed control valve group can output the corresponding flow rate for pressure compensation according to the electrical signal value and control the flow rate of the two oils respectively according to the ordinary speed control valve group to achieve the purpose of dual-cylinder synchronization. The primary and secondary are clearly distinguished, reducing the fluctuation of valve data in the same control form, making the operation more stable and saving production costs.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A double-hanging-point plunger cylinder synchronous safety system, characterized in that: It comprises an oil tank (1), a hydraulic pump motor assembly (2), a pressure regulating valve assembly (3), a control valve assembly (4), an oil filter assembly, and a plunger cylinder assembly; The hydraulic pump motor assembly (2) comprises two hydraulic pump motors, the oil suction port of the hydraulic pump motor is connected to the oil tank (1) via a low-pressure ball valve and a shock-absorbing joint assembly, the oil outlet of the hydraulic pump motor is connected to the pressure regulating valve assembly (3) via a one-way valve and a high-pressure hose assembly, and the pressure regulating valve assembly (3) is connected to the control valve assembly (4); The control valve assembly (4) is provided with an electromagnetic reversing valve (5) connected to the pressure regulating valve assembly (3) through an oil inlet pipeline, a speed regulating valve group (6), an oil outlet interface, and an oil return pipeline connected to the oil tank (1). The speed regulating valve group (6) is divided into two paths, one is a proportional speed regulating valve group, and the other is a common speed regulating valve group. The proportional speed regulating valve group and the common speed regulating valve group are respectively connected to the plunger cylinder group through a hydraulically controlled one-way valve (7) and from their respective corresponding oil outlet interfaces. A first pressure measuring joint (8) is also installed at the oil outlet interface.

2. A double-hanging-point plunger-cylinder synchronous safety system as claimed in claim 1, characterized in that: The oil filter group comprises a high-pressure oil filter (9) and an oil return filter (10), wherein the high-pressure oil filter (9) is arranged in the oil inlet pipeline, and the oil return filter (10) is arranged in the oil return pipeline.

3. A double-hanging-point plunger-cylinder synchronous safety system as claimed in claim 1, characterized in that: The pressure regulating valve assembly (3) is also provided with a secondary pressure electromagnetic overflow valve (11) and a second side pressure joint (12).

4. A double-hanging-point plunger-cylinder synchronous safety system as claimed in claim 1, characterized in that: The plunger cylinder group comprises two independent plunger cylinders (13), and the two plunger cylinders (13) are connected via a pipeline with a double ball valve (14).

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