Integrated mini hydraulic system of slurry valve

Abstract

An integrated mini hydraulic system of a slurry valve comprises the slurry valve (3) driven and controlled by a control valve assembly (1) and a driving assembly (2), and is technically characterized in that the slurry valve (3) comprises a hydraulically-driven valve seat (32) and a valve clack (31) with an arc-shaped or planar matching surface matched with the valve seat (32), and one-way or two-way hydraulic cavities (33) are formed in the two sides of the valve seat (32) respectively; the control valve assembly (1) comprises a valve body (12), an energy accumulator (13), an electromagnetic directional valve (14) and a hydraulic control one-way valve (15) or a hydraulic balance valve (16), wherein the valve body (12) is provided with a forward energy charging connector (121) and a reverse energy charging connector (123). The device has the advantages of being compact in structure, convenient to operate, stable in operation and the like, can be placed on a slurry valve body, and facilitates connection of a hydraulic pipeline and connection of an electric control circuit.

Description

Technical Field

[0001] The utility model relates to a fluid working system, in particular to an integrated mini hydraulic system for a slurry valve controlled by hydraulic force, which is mainly used for processing ore pulp, controlling chemical slurry, regulating sewage slurry, managing pulp, etc. Background Art

[0002] The slurry valve plays a crucial role in the slurry conveying pipelines in many fields such as mines, metallurgy, and chemical industry. It is the core equipment for the control of the entire pipe network; it can effectively handle high-viscosity and corrosive slurry, ensure that the slurry does not leak during use, and achieve precise control of the slurry flow direction.

[0003] The existing slurry valves are generally controlled manually or electrically. However, with the continuous improvement of the industrial automation level, more stringent requirements are imposed on the performance and control accuracy of the slurry valves. At present, in the field of long-distance solid-liquid two-phase medium fluid pipeline transportation, the slurry valve, as a key supporting facility for pipeline transportation, usually has the characteristics of large diameter and high pressure, and the slurry valve often needs to be switched on and off under pressure. Due to the presence of high-pressure slurry medium, the sealing specific pressure between the valve seat sealing ring and the valve flap will become very large. Therefore, when switching the hydraulic-controlled slurry valve, it is necessary to first release the pre-tightening pressure between the valve seat and the valve flap. The conventional hydraulic control of the slurry valve uses a hydraulic station to jointly control multiple pipeline slurry valves, which results in a very complex layout of the on-site hydraulic pipelines and is also difficult to install. In addition, due to the existence of long-distance oil pipelines, multiple joint controls will also cause slow hydraulic response, and the judgment of maintenance faults will become complex. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an integrated mini hydraulic system to fundamentally solve the above problems and realize the structure of independently controlling a slurry valve. It has the advantages of compact structure, convenient operation, stable operation, etc., and can be placed on the slurry valve body to facilitate the connection of hydraulic pipelines and electric control circuits.

[0005] To achieve the above object, the present utility model provides the following technical solutions: The integrated one-piece mini hydraulic system of the slurry valve includes a slurry valve driven and controlled by a control valve assembly and a driving assembly. The technical key points are as follows: The slurry valve includes a valve seat driven by hydraulic pressure and a valve flap whose mating surface with the valve seat is arc-shaped or flat. Hydraulic chambers are respectively provided on both sides of the valve seat in a one-way or two-way manner; The control valve assembly includes a valve body provided with a hydraulic charging interface (forward charging interface) and a hydraulic pressure relief port (reverse charging interface), an accumulator, an electromagnetic directional control valve, and a pilot-operated check valve or a hydraulic balance valve. The control valve assembly can be connected to the hydraulic chamber through the hydraulic charging interface (forward charging interface) and a hydraulic pipeline to form a one-way hydraulic control; Or a two-way hydraulic control is formed by connecting to both sides of the hydraulic chamber through the forward charging interface, the reverse charging interface, and a hydraulic pipeline.

[0006] Further, the driving assembly includes an oil tank and a motor pump unit. The motor pump unit is installed horizontally on the side, and the control valve assembly is located above the motor pump unit.

[0007] Further, the control valve assembly further includes a pressure sensor, a pressure gauge, and a relief valve for limiting the system safety pressure.

[0008] Further, the electromagnetic directional control valve is used to control the extension and retraction (clamping and loosening) of the valve seat.

[0009] Further, the pilot-operated check valve is used to control the valve seat to stop at any position without leakage after clamping the valve flap. The hydraulic balance valve can compensate the pressure of the slurry valve cylinder at any time.

[0010] Further, when the pipeline network vibrates greatly, the hydraulic balance valve compensates the pressure of the slurry valve cylinder at any time to ensure the stable balance of the cylinder pressure, thereby ensuring reliable valve sealing.

[0011] The beneficial effects of the present utility model: In terms of the overall technical solution, the present utility model controls the flow of hydraulic oil, guides the hydraulic oil to the hydraulic chamber to drive the cooperation between the valve seat and the valve flap, and realizes the opening and closing of the slurry valve.

[0012] In terms of the specific structure, the control valve assembly and the driving assembly adopt an integrated one-piece design, which reduces the layout of on-site hydraulic pipelines, has a light weight, a moderate size, and can be directly suspended on the slurry valve body.

[0013] With the fuel tank placed on the side, the utility model can achieve the independent control of on-site slurry valves. Each slurry valve includes a slurry valve body and a hydraulic station, and is directly operated through the on-site control button box, avoiding the complex layout of on-site hydraulic pipelines caused by using one hydraulic station to jointly control multiple pipeline slurry valves. By adopting a mini hydraulic system, the situation of slow hydraulic response is reduced, providing a sealing pre-tightening force for the slurry valve, with earthquake resistance, shock resistance, anti-loosening, anti-leakage, fast response speed, voltage stabilization and energy saving, and being applicable to the requirements of different diameters and different pressure grades.

[0014] By adopting hydraulic control, the operation of the slurry valve is controlled through the cooperation of the control valve assembly and the driving assembly, which can achieve remote control and automatic control, improving production efficiency and management level. It can also be connected to the factory centralized control through the centralized DCS.

[0015] In summary, the utility model has the advantages of compact structure, convenient operation, stable operation, etc. Brief Description of the Drawings

[0016] Figure 1 It is a schematic principle diagram of the utility model adopting ordinary single (double)-direction hydraulic control.

[0017] Figure 2 It is a front view structural schematic diagram of the utility model adopting ordinary single (double)-direction hydraulic control.

[0018] Figure 3 It is a side view structural schematic diagram of the utility model adopting ordinary single (double)-direction hydraulic control.

[0019] Figure 4 It is a schematic principle diagram of the utility model adopting single (double)-direction hydraulic control with a hydraulic balance valve.

[0020] Figure 5 It is a front view structural schematic diagram of the utility model adopting single (double)-direction hydraulic control with a hydraulic balance valve.

[0021] Figure 6 It is a side view structural schematic diagram of the utility model adopting single (double)-direction hydraulic control with a hydraulic balance valve.

[0022] Figure 7 It is an isometric side view structural schematic diagram of the utility model adopting single (double)-direction hydraulic control with a hydraulic balance valve. Detailed Description of the Embodiment

[0023] The following combines Figures 1 - 7 , and details the specific content of the utility model through specific embodiments.

[0024] Embodiment 1 The integrated mini hydraulic system of the slurry valve includes a slurry valve 3 driven and controlled by a control valve assembly 1 and a driving assembly 2.

[0025] Among them, the slurry valve 3 includes a valve seat 32 driven by hydraulic pressure, and a valve flap 31 with an arc-shaped or flat mating surface that mates with the valve seat 32. One-way or two-way hydraulic chambers 33 are respectively provided on both sides of the valve seat 32.

[0026] The control valve assembly 1 includes a valve body 12 provided with a forward energy charging interface 121 and a reverse energy charging interface 123, an accumulator 13, an electromagnetic directional control valve 14, and a pilot-operated check valve 15 or a hydraulic balance valve 16. The control valve assembly 1 is connected to the hydraulic chamber 33 through the forward energy charging interface 121 and a hydraulic pipeline 122. The valve seat 32 of the slurry valve 3 is connected through the hydraulic pipeline 122. By charging and compensating pressure with hydraulic oil, the valve seat 32 is pushed to act, providing a pre-tightening force for the sealing of the slurry valve 3. The control valve assembly 1 can also be connected to the other side of the hydraulic chamber 33 through the reverse hydraulic energy charging interface 123 and the hydraulic pipeline 122. By charging and compensating pressure with hydraulic oil, the valve seat 32 is pushed in the reverse direction to quickly release the valve seat 32 and the valve flap 31. According to the type of the slurry valve 3, the valve flap 31 can be a valve ball, a valve plate, or various types of valve flaps.

[0027] Port B is the forward energy charging interface 121, which provides hydraulic energy charging to increase the pre-tightening force; Port A is the reverse energy charging interface 123, which is connected to the hydraulic pipeline to relieve pressure. The reverse energy charging interface 123 is connected to the hydraulic pipe to assist in loosening the pre-tightening force. According to the working conditions, Port A can be connected to the hydraulic pipe to assist in reversing the release of the valve seat 32, which is two-way control; it can also be blocked by a hydraulic plug, and the valve seat 32 is released by means of the pressure of the solid-liquid fluid, which is one-way control. The one-way or two-way hydraulic control can be determined according to the specifications of the valve and the characteristics of the medium. The accumulator 13 is a diaphragm-type accumulator with a compact structure, and the charging pressure is designed according to the system pressure; the diaphragm-type accumulator is a common hydraulic energy storage device, which is mainly composed of a metal shell and an internal elastic diaphragm, and uses the elastic deformation of the diaphragm to store and release energy. When the system pressure rises, the hydraulic oil enters the accumulator 13, and the diaphragm is compressed to store energy; when the system pressure drops, the diaphragm expands to release the stored energy. A protective cover 131 is also provided outside the control valve assembly 1.

[0028] The drive assembly 2 includes an oil tank 21 and a motor pump unit 22. The motor pump unit 22 is horizontally installed on the side. The motor is a small-power motor selected according to the slurry valve 3, and the oil pump is of a gear pump structure. The control valve assembly 1 is located above the motor pump unit 22, and the valve body 12 is of an L-shaped structure to ensure the overall compact structure. The volume of the oil tank 21 is small, and the oil tank is installed on the side. A liquid level gauge (not marked in the figure) is provided on the side of the oil tank.

[0029] The control valve assembly 1 also includes a pressure sensor 11, a pressure gauge 111, and a relief valve 17 located on the upper part of the valve body 12. The relief valve 17 is inserted below the L-shaped side of the valve body 12, and the pressure of the slurry valve 3 can be controlled at any time through the relief valve 17 to keep its pressure balanced. The pressure sensor 11 can monitor the system pressure remotely and in real time, and is used to monitor the pressure state of the hydraulic system circuit and realize the linkage between signal and electrical control.

[0030] The electromagnetic reversing valve 14 is used to control the clamping and loosening of the valve seat 32 .

[0031] A hydraulically controlled one-way valve 15 is arranged on the upper part of the valve body 12 to lock and maintain pressure, and ensure that the oil cylinder stops at any position without leakage after clamping the valve disc 31. An electromagnetic reversing valve 14 is arranged above the hydraulically controlled one-way valve 15, and the electromagnetic reversing valve 14 can control the forward and reverse charging of the oil cylinder, clamping and loosening, charging and depressurizing the oil cylinder, and then controlling the contraction of the valve seat 32.

[0032] Working principle: When the preload force between the valve seat 32 and the valve disc 31 needs to be tightened, the motor pump group 22 starts, the electromagnetic reversing valve 14 changes direction, and provides hydraulic oil to push the valve seat 32 to the right, thereby increasing the preload force. When the pressure reaches the set value, the pressure sensor feedbacks a signal, the electromagnetic reversing valve 14 changes direction to the center, and the relief valve 17 determines whether to start according to the set pressure at this time. At the same time, the hydraulically controlled one-way valve 15 locks the pressure to ensure pressure balance; when the valve seat 32 and the valve disc 31 need to be loosened, the electromagnetic reversing valve 14 changes direction, the hydraulic oil is depressurized, the preload force between the valve seat 32 and the valve disc 31 is released, the pressure is reduced to the set value, the pressure sensor feedbacks a signal, and the pressure relief is completed.

[0033] Example 2 In this example, the hydraulically controlled one-way valve 15 is replaced by a hydraulic balancing valve 16. The hydraulic balancing valve 16 is a superimposed overflow valve on the basis of the hydraulically controlled one-way valve. It can be used in conditions where the on-site pipeline vibration is relatively large, the pressure fluctuation is relatively strong, and the slurry valve flange and the pipeline flange have expansion and contraction vibrations. The hydraulic balancing valve 16 ensures the set pressure of the slurry valve cylinder by means of pressure relief, and can compensate for the pressure of the slurry valve cylinder at any time to ensure that the cylinder pressure is maintained in a stable state.

[0034] Explanation of the reference numerals: 1 control valve assembly, 11 pressure sensor, 111 pressure gauge, 12 valve body, 121 forward charging interface, 122 hydraulic pipeline, 123 reverse charging interface, 13 accumulator, 131 protective cover, 14 electromagnetic reversing valve, 15 hydraulically controlled one-way valve, 16 hydraulic balance valve, 17 overflow valve; 2 drive assembly, 21 oil tank, 22 motor pump group; 3 slurry valve, 31 valve disc, 32 valve seat, 33 hydraulic chamber.

Claims

1. An integrated mini hydraulic system for a slurry valve, comprising a slurry valve (3) driven and controlled by a control valve assembly (1) and a drive assembly (2), characterized in that: The slurry valve (3) comprises a valve seat (32) driven by hydraulic pressure, a valve flap (31) whose mating surface with the valve seat (32) is an arc or a plane, and one-way or two-way hydraulic chambers (33) are respectively arranged on both sides of the valve seat (32); The control valve assembly (1) comprises a valve body (12) provided with a forward charging interface (121) and a reverse charging interface (123), an accumulator (13), an electromagnetic reversing valve (14), and a hydraulically controlled one-way valve (15) or a hydraulic balancing valve (16). The control valve assembly (1) is connected to a hydraulic chamber (33) via the forward charging interface (121) and a hydraulic pipeline (122) to form a one-way hydraulic control. Alternatively, a forward charging interface (121), a reverse charging interface (123) and a hydraulic pipeline (122) are connected to both sides of the hydraulic chamber (33) to form a bidirectional hydraulic control.

2. The integrated mini hydraulic system of the slurry valve according to claim 1, characterized in that: The driving assembly (2) comprises an oil tank (21) and a motor pump assembly (22). The motor pump assembly (22) is installed horizontally on its side, and the control valve assembly (1) is located above the motor pump assembly (22).

3. The integrated mini hydraulic system of the slurry valve according to claim 1, characterized in that: The control valve assembly (1) also includes a pressure sensor (11), a pressure gauge (111), and a relief valve (17) for limiting the safety pressure of the system.

4. The integrated mini hydraulic system of the slurry valve according to claim 1, 2 or 3, characterized in that: The electromagnetic reversing valve (14) is used to control the clamping and loosening of the valve seat (32).

5. The integrated mini hydraulic system of the slurry valve according to claim 4, characterized in that: The hydraulically controlled one-way valve (15) is used to control the valve seat (32) to clamp the valve disc and stop at any position without leakage.

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