Proportional control prefill valve device

Abstract

The invention discloses a proportional control prefill valve device which comprises an oil tank, an oil inlet unit, a prefill valve, a proportional valve control unit, a displacement sensing unit and an oil drainage and return unit, the prefill valve is connected with the oil tank through the oil inlet unit, the proportional valve control unit is connected with the prefill valve and used for controlling the prefill valve to work, and the displacement sensing unit is arranged in the middle of the prefill valve and used for controlling the prefill valve to work. The oil discharging and returning unit is arranged on the side, corresponding to the oil inlet unit, of the prefill valve and used for discharging hydraulic oil in the prefill valve. The device is simple in overall structure, the opening and closing states and the specific position of the prefill valve can be displayed in real time, the idle stroke advancing and retreating speed of the extruder can be remarkably increased, impact and noise of the extruder are reduced, the maintenance cost of the extruder is reduced, the production efficiency is improved, and the working environment of operators is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid filling valves, and particularly relates to a proportional control liquid filling valve device. Background Art

[0002] In metal extrusion forming, in order to increase the advancing and retracting speeds of the empty stroke of the extruder, large-diameter liquid filling valves are widely used to achieve rapid and large-flow liquid filling and drainage of the main cylinder of the hydraulic press. When the main cylinder needs to work under high pressure, the liquid filling valve can separate the oil tank from the main cylinder. Subsequently, to improve the efficiency of the extruder equipment and shorten the non-extrusion time, the opening and closing speed of the liquid filling valve becomes a key factor. At the same time, increasing the opening and closing speeds of the liquid filling valve brings large impact and high noise, which becomes a new problem. Especially during the use of large and heavy extruders, this problem is particularly prominent.

[0003] In the prior art, the opening of the liquid filling valve relies on the self-priming of the plunger, and the closing relies on the spring. During long-term use, the spring is prone to fatigue or being stuck during the reciprocating process, both of which can cause equipment failures. Since the spring is inside the equipment, disassembly and maintenance are relatively difficult. This switching method has great uncertainty, and it is difficult to judge and handle failures, which reduces the production efficiency of the extruder equipment to a certain extent. Summary of the Invention

[0004] To at least partially solve the technical problems existing in the above prior art, the present invention provides a proportional control liquid filling valve device.

[0005] The proportional control liquid filling valve device of the present invention includes an oil tank, an oil inlet unit, a liquid filling valve, a proportional valve control unit, a displacement sensing unit, and an oil discharge and return unit. The liquid filling valve is connected to the oil tank through the oil inlet unit. The proportional valve control unit is connected to the liquid filling valve for controlling the operation of the liquid filling valve. The displacement sensing unit is arranged in the middle of the liquid filling valve for detecting the working state and position of the liquid filling valve. The oil discharge and return unit is arranged on one side of the liquid filling valve corresponding to the oil inlet unit for discharging the hydraulic oil in the liquid filling valve, wherein:

[0006] The liquid filling valve includes an oil filling valve body, a hydraulic push valve body, an oil supply flange, a push rod, a sealing plug, a sealing gasket, a sealing push table and a sealing end cover. The oil filling valve body and the hydraulic push valve body are integrally formed. The oil supply flange is arranged on the oil filling valve body. The sealing gasket is fixed between the oil filling valve body and the hydraulic push valve body. The push rod is arranged inside the oil filling valve body and the hydraulic push valve body and is slidably connected with the sealing gasket. The sealing plug is arranged at one end of the push rod for controlling the opening and closing of the oil filling valve body. The sealing push table is arranged at the other end of the push rod for sliding inside the hydraulic push valve body to drive the push rod to slide. The sealing end cover is arranged at the end of the hydraulic push valve body. A first cavity is formed between the hydraulic push valve body, the sealing gasket and the sealing push table. A second cavity is formed between the hydraulic push valve body, the sealing push table and the sealing end cover.

[0007] Further, in the above-mentioned proportional control liquid filling valve device, the oil inlet unit includes a signal - sending butterfly valve, a shock absorber hose and a fastening assembly. The input end of the signal - sending butterfly valve is fixedly connected with the oil tank outlet pipe through the fastening assembly. One end of the shock absorber hose is fixedly connected with the output end of the signal - sending butterfly valve through the fastening assembly. The other end of the shock absorber hose is connected with the oil supply flange through the fastening assembly. The oil supply flange is internally communicated with the oil filling valve body.

[0008] Further, in the above - mentioned proportional control liquid filling valve device, the proportional valve control unit adopts a three - position four - way proportional valve. An oil inlet, a first oil outlet, a second oil outlet and an oil return port are arranged on the proportional valve control unit. The oil inlet of the proportional valve control unit is connected with the oil tank.

[0009] Further, in the above - mentioned proportional control liquid filling valve device, a first hydraulic pipeline is arranged on the hydraulic push valve body. One end of the first hydraulic pipeline is communicated with the first cavity, and the other end of the first hydraulic pipeline is connected with the first oil outlet.

[0010] Further, in the above - mentioned proportional control liquid filling valve device, a second hydraulic pipeline is arranged on the sealing end cover. One end of the second hydraulic pipeline is communicated with the second cavity, and the other end of the second hydraulic pipeline is connected with the second oil outlet.

[0011] Further, in the above - mentioned proportional control liquid filling valve device, the oil draining and oil returning unit includes an oil draining pipeline, an oil returning pipeline, a three - way connector and a ball valve. One end of the oil draining pipeline is internally communicated with the oil filling valve body. The oil returning pipeline is connected with the oil return port. The oil draining pipeline, the oil returning pipeline and the ball valve are respectively connected with the three - way connector.

[0012] Further, in the above-mentioned proportional control liquid filling valve device, the displacement sensing unit includes a display unit and a detection unit. The display unit is connected to the detection unit for displaying the result of the detection unit. The display unit is fixed to the sealing end cover, and the detection unit is arranged inside the push rod for detecting the position of the push rod.

[0013] Further, in the above-mentioned proportional control liquid filling valve device, the inner wall diameter of the oil filling end of the oil filling valve body is smaller than the diameter of the sealing plug.

[0014] Further, in the above-mentioned proportional control liquid filling valve device, the sealing plug and the push rod are integrally connected.

[0015] The proportional control liquid filling valve device of the present invention has the following advantages and beneficial effects:

[0016] The overall structure of the present invention is simple. Through the setting of the displacement sensing unit, the opening and closing states and specific positions of the liquid filling valve can be displayed in real time. By the cooperation of the proportional valve and the hydraulic push valve body, the opening and closing of the liquid filling valve can be controlled, which can significantly improve the forward and backward speeds of the empty stroke of the extruder, reduce the impact and noise of the extruder, lower the maintenance cost of the extruder, improve production efficiency, and improve the working environment of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. In the drawings:

[0018] Figure 1 is a schematic diagram of the overall structure of the proportional control liquid filling valve device of the present invention;

[0019] Figure 2 is a schematic diagram of the structure of the liquid filling valve of the proportional control liquid filling valve device of the present invention;

[0020] Figure 3 is a schematic diagram of the connection of the proportional valve control unit of the proportional control liquid filling valve device of the present invention;

[0021] Figure 4 is a schematic diagram of the structure of the displacement sensing unit of the proportional control liquid filling valve device of the present invention.

[0022] Description of the reference numerals:

[0023] 100: Extruder;

[0024] 1: Fuel tank;

[0025] 2: Inlet oil unit, 21: Signal - sending butterfly valve, 22: Shock - absorbing hose, 23: Fastening assembly;

[0026] 3: Filling valve, 31: Filling valve body;

[0027] 32: Hydraulic - pushing valve body, 321: First cavity, 322: Second cavity, 323: First hydraulic pipeline;

[0028] 33: Oil - supply flange, 34: Pushing pull rod, 35: Sealing plug, 36: Sealing gasket, 37: Sealing push - table;

[0029] 38: Sealing end - cover, 381: Second hydraulic pipeline;

[0030] 4: Proportional - valve control unit, 41: Inlet - oil port, 42: First outlet - oil port, 43: Second outlet - oil port, 44: Return - oil port;

[0031] 5: Displacement - sensing unit, 51: Display unit, 52: Detection unit;

[0032] 6: Oil - draining and return - oil unit, 61: Oil - draining pipeline, 62: Return - oil pipeline, 63: Three - way connector, 64: Ball valve. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0034] As Figures 1 to 4 shown, the proportional - control filling - valve device of the present invention includes a fuel tank 1, an inlet - oil unit 2, a filling valve 3, a proportional - valve control unit 4, a displacement - sensing unit 5 and an oil - draining and return - oil unit 6. The filling valve 3 is connected to the fuel tank 1 through the inlet - oil unit 2. The proportional - valve control unit 4 is connected to the filling valve 3 to control the operation of the filling valve 3. The displacement - sensing unit 5 is arranged in the middle of the filling valve 3 to detect the working state and position of the filling valve 3. The oil - draining and return - oil unit 6 is arranged on the side of the filling valve 3 corresponding to the inlet - oil unit 2 to drain the hydraulic oil in the filling valve 3. Among them:

[0035] The liquid filling valve 3 includes an oil filling valve body 31, a hydraulic push valve body 32, an oil supply flange 33, a push pull rod 34, a sealing plug 35, a sealing gasket 36, a sealing push table 37 and a sealing end cover 38. The oil filling valve body 31 and the hydraulic push valve body 32 are integrally formed. The oil supply flange 33 is arranged on the oil filling valve body 31. The sealing gasket 36 is fixed between the oil filling valve body 31 and the hydraulic push valve body 32. The push pull rod 34 is arranged inside the oil filling valve body 31 and the hydraulic push valve body 32 and is slidably connected with the sealing gasket 36. The sealing plug 35 is arranged at one end of the push pull rod 34 and is used to control the opening and closing of the oil filling valve body 31. The sealing push table 37 is arranged at the other end of the push pull rod 34 and is used to slide inside the hydraulic push valve body 32 to drive the push pull rod 34 to slide. The sealing end cover 38 is arranged at the end of the hydraulic push valve body 32. A first cavity 321 is formed between the hydraulic push valve body 32, the sealing gasket 36 and the sealing push table 37. A second cavity 322 is formed between the hydraulic push valve body 32, the sealing push table 37 and the sealing end cover 38.

[0036] Further, in the above-mentioned proportional control liquid filling valve device, the oil inlet unit 2 includes a signal - sending butterfly valve 21, a shock absorber hose 22 and a fastening assembly 23. The input end of the signal - sending butterfly valve 21 is fixedly connected with the oil outlet pipe of the fuel tank 1 through the fastening assembly 23. One end of the shock absorber hose 22 is fixedly connected with the output end of the signal - sending butterfly valve 21 through the fastening assembly 23. The other end of the shock absorber hose 22 is connected with the oil supply flange 33 through the fastening assembly 23. The oil supply flange 33 is internally connected with the oil filling valve body 31 and is used to supply oil to the oil filling valve body 31.

[0037] Further, in the above - mentioned proportional control liquid filling valve device, the proportional valve control unit 4 adopts a three - position four - way proportional valve. An oil inlet 41, a first oil outlet 42, a second oil outlet 43 and an oil return port 44 are arranged on the proportional valve control unit 4. The oil inlet 41 of the proportional valve control unit 4 is connected with the fuel tank 1.

[0038] Further, in the above - mentioned proportional control liquid filling valve device, a first hydraulic pipeline 323 is arranged on the hydraulic push valve body 32. One end of the first hydraulic pipeline 323 is communicated with the first cavity 321, and the other end of the first hydraulic pipeline 323 is connected with the first oil outlet 42. Thus, when the first oil outlet 42 discharges oil, the first cavity 321 is filled with oil, and the sealing push table 37 is pushed to squeeze the space of the second cavity 322.

[0039] Further, in the above - mentioned proportional control liquid filling valve device, a second hydraulic pipeline 381 is arranged on the sealing end cover 38. One end of the second hydraulic pipeline 381 is communicated with the second cavity 322, and the other end of the second hydraulic pipeline 381 is connected with the second oil outlet 43. Thus, when the second oil outlet 43 discharges oil, the second cavity 322 is filled with oil, and the sealing push table 37 is pushed to squeeze the space of the first cavity 321.

[0040] Further, in the above proportional control liquid filling valve device, the oil draining and oil returning unit 6 includes an oil draining pipeline 61, an oil returning pipeline 62, a tee joint 63 and a ball valve 64. One end of the oil draining pipeline 61 is communicated with the inside of the oil filling valve body 31, the oil returning pipeline 62 is connected to the oil returning port 44, and the oil draining pipeline 61, the oil returning pipeline 62 and the ball valve 64 are respectively connected to the tee joint 63, so as to drain the hydraulic oil in the oil filling valve body 31 and the hydraulic push valve body 32 by controlling the ball valve 64.

[0041] Further, in the above proportional control liquid filling valve device, the displacement sensing unit 5 includes a display unit 51 and a detection unit 52. The display unit 51 is connected to the detection unit 52 for displaying the result of the detection unit 52. The display unit 51 is fixed to the sealing end cover 38, and the detection unit 52 is arranged in the push rod 34 for detecting the position of the push rod 34.

[0042] Further, in the above proportional control liquid filling valve device, the inner diameter of the oil filling end inner wall of the oil filling valve body 31 is smaller than the diameter of the sealing plug 35, so that the hydraulic oil in the oil filling valve body 31 can be filled and opened and closed by controlling the sealing plug 35.

[0043] Further, in the above proportional control liquid filling valve device, the sealing plug 35 and the push rod 34 are integrally connected, thus effectively avoiding the leakage of hydraulic oil.

[0044] Specifically, when the extruder 100 is working normally, the signal - sending butterfly valve 21 is in an open state all the time, and the hydraulic oil in the oil tank 1 flows into the oil filling valve body 31 and fills the oil filling valve body 31.

[0045] When the main cylinder of the extruder 100 needs to be filled with liquid, the proportional valve control unit 4 receives a signal to control the second oil outlet 43 to discharge oil. The second oil outlet 43 enters the second cavity 322 through the second hydraulic pipeline 381, and pushes the sealing push - table 37 to move towards the first cavity 321. At the same time, the sealing plug 35 is driven to move by the push rod 34, so that the sealing plug 35 is separated from the oil filling valve body 31, and thus the hydraulic oil inside the oil filling valve body 31 quickly fills the main cylinder of the extruder 100.

[0046] When the extruder 100 needs to be pressurized, the proportional valve control unit 4 receives a signal to control the first oil outlet 42 to discharge oil. The first oil outlet 42 enters the first cavity 321 through the first hydraulic pipeline 323, and pushes the sealing push - table 37 to move towards the second cavity 322. At the same time, the sealing plug 35 is driven to move by the push rod 34, so that the sealing plug 35 fits with the oil filling valve body 31, thus forming a seal with the inside of the oil filling valve body 31 and preventing the hydraulic oil from filling the main cylinder of the extruder 100.

[0047] When maintenance is required, first, the proportional valve control unit 4 is used to control the hydraulic oil to enter the first cavity 321, and the signal - sending butterfly valve 21 is closed. At this time, the ball valve 64 is opened to drain the hydraulic oil in the oil - filling valve body 31 completely and then carry out maintenance.

[0048] In summary, compared with the prior art, the proportional - control liquid - filling valve device of the present invention has the following advantages and beneficial effects:

[0049] The overall structure of the present invention is simple. Through the setting of the displacement sensing unit, the opening and closing states and specific positions of the liquid - filling valve can be displayed in real time. Through the cooperation of the proportional valve and the hydraulic - pushing valve body, the opening and closing of the liquid - filling valve can be controlled, which can significantly improve the forward and backward speeds of the empty stroke of the extruder, reduce the impact and noise of the extruder, lower the maintenance cost of the extruder, improve production efficiency, and improve the working environment of the operators.

[0050] It should be noted that in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood according to specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. In addition, in this article, "front", "rear", "left", "right", "upper" and "lower" are all referenced based on the placement state shown in the drawings.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A proportional control filling valve device, characterized in that: The proportional control filling valve device comprises an oil tank, an oil inlet unit, a filling valve, a proportional valve control unit, a displacement sensing unit and an oil discharge and return unit. The filling valve is connected to the oil tank through the oil inlet unit. The proportional valve control unit is connected to the filling valve for controlling the operation of the filling valve. The displacement sensing unit is arranged in the middle of the filling valve for detecting the working state and position of the filling valve. The oil discharge and return unit is arranged on the side of the filling valve corresponding to the oil inlet unit for discharging the hydraulic oil in the filling valve, wherein: The filling valve includes an oil filling valve body, a hydraulic push valve body, an oil supply flange, a push rod, a sealing plug, a sealing gasket, a sealing push platform and a sealing end cover. The oil filling valve body and the hydraulic push valve body are integrally formed, the oil supply flange is arranged on the oil filling valve body, the sealing gasket is fixed between the oil filling valve body and the hydraulic push valve body, the push rod is arranged inside the oil filling valve body and the hydraulic push valve body and is slidably connected with the sealing gasket, the sealing plug is arranged at one end of the push rod for controlling the opening and closing of the oil filling valve body, the sealing push platform is arranged at the other end of the push rod for sliding in the hydraulic push valve body to drive the push rod to slide, the sealing end cover is arranged at the end of the hydraulic push valve body, the hydraulic push valve body, the sealing gasket and the sealing push platform form a first cavity, and the hydraulic push valve body, the sealing push platform and the sealing end cover form a second cavity.

2. The proportional control filling valve device according to claim 1, characterized in that: The oil inlet unit includes a signal-transmitting butterfly valve, a shock absorber throat and a fastening assembly. The input end of the signal-transmitting butterfly valve is fixedly connected to the oil outlet pipe of the oil tank through the fastening assembly. One end of the shock absorber throat is fixedly connected to the output end of the signal-transmitting butterfly valve through the fastening assembly. The other end of the shock absorber throat is connected to the oil supply flange through the fastening assembly. The oil supply flange is connected to the interior of the oil filling valve body.

3. The proportional control filling valve device according to claim 1, characterized in that: The proportional valve control unit adopts a three-position four-way proportional valve. The proportional valve control unit is provided with an oil inlet, a first oil outlet, a second oil outlet and an oil return port. The oil inlet of the proportional valve control unit is connected to the oil tank.

4. The proportional control filling valve device according to claim 3, characterized in that: The hydraulic push valve body is provided with a first hydraulic pipeline, one end of the first hydraulic pipeline is communicated with the first cavity, and the other end of the first hydraulic pipeline is connected with the first oil outlet.

5. The proportional control filling valve device according to claim 3, characterized in that: The sealing end cover is provided with a second hydraulic pipeline, one end of the second hydraulic pipeline is communicated with the second cavity, and the other end of the second hydraulic pipeline is connected with the second oil outlet.

6. The proportional control filling valve device according to claim 3, characterized in that: The oil drain and return unit includes an oil drain pipe, an oil return pipe, a three-way connector and a ball valve. One end of the oil drain pipe is connected to the interior of the oil filling valve body, and the oil return pipe is connected to the oil return port. The oil drain pipe, the oil return pipe and the ball valve are respectively connected to the three-way connector.

7. The proportional control filling valve device according to claim 1, characterized in that: The displacement sensing unit includes a display unit and a detection unit. The display unit is connected to the detection unit and is used to display the detection unit result. The display unit is fixed to the sealing end cover. The detection unit is arranged in the push rod and is used to detect the position of the push rod.

8. The proportional control filling valve device according to claim 1, characterized in that: The inner wall diameter of the oil filling end of the oil filling valve body is smaller than the diameter of the sealing plug.

9. The proportional control filling valve device according to claim 1, characterized in that: The sealing plug is integrally connected to the push rod.

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