Upper oil cylinder protection hydraulic oil circuit and magnetic material pressing machine
By setting up a cartridge valve and an electromagnetic reversing valve in the hydraulic oil circuit of the cylinder on the magnetic press, the problem of the upper cylinder requiring continuous hydraulic pressure when the pin is contracted is solved, reducing energy loss and improving efficiency, achieving the The hydraulic support of the oil pump when it is not operating extends the service life of the system.
Patent Information
- Application Number
- CN202420605394.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-03-27
AI Technical Summary
During the production of magnetic materials, the upper oil cylinder in the prior art requires continuous hydraulic pressure when the pin is maintained in contraction, resulting in continuous operation of the oil pump, resulting in energy loss and inefficiency.
A hydraulic oil circuit for upper oil cylinder protection is designed. By setting up a cartridge valve between the oil return oil circuit and the rod cavity of the oil cylinder on the magnetic press, the hydraulic pressure is controlled by using an electromagnetic reversing valve and a hydraulically controlled check valve to ensure that The pinch rod can still maintain a contraction action when the oil pump is not operating, and the stability and accuracy of the system are improved through the filter and the liquid filling valve.
It realizes the hydraulic pressure of the upper oil cylinder while the oil pump is not operating, reduces energy loss, improves the energy utilization efficiency of the oil circuit, and extends the service life of the system through the design of filters and liquid filling valves.
Smart Images
Figure CN222351048U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of magnetic material production, in particular to an upper oil cylinder protection hydraulic oil circuit and a magnetic material press. Background Art
[0002] In the production process of magnetic materials, a press is required to press the raw materials into shape. During the pressing process, an upper cylinder is usually provided on the upper die, and a lower cylinder is provided on the lower die. The upper cylinder then drives the upper die to press against the lower die, and the lower cylinder provides power to support the lower die. In the prior art, when the push rod of the upper cylinder maintains a contraction action, in order to prevent the push rod from falling naturally under the action of gravity, it is necessary to maintain the hydraulic pressure of the rod chamber of the upper cylinder, resulting in the oil pump needing to operate continuously to ensure that the upper cylinder maintains a contraction action. Utility Model Content
[0003] The utility model aims to provide an upper cylinder protection hydraulic oil circuit and a magnetic material press, which can maintain the hydraulic pressure of the rod chamber of the upper cylinder when the oil pump is not operating, so that the push rod maintains the contraction action, and can reduce the energy loss of the oil circuit.
[0004] In the first aspect, the utility model provides an upper cylinder protection hydraulic oil circuit, comprising: an oil tank, an oil pump, an oil inlet oil circuit and an oil return oil circuit; the oil tank is connected to the oil pump through a pipeline, the oil inlet oil circuit is connected to the oil pump, and the oil inlet oil circuit is provided with a first electromagnetic reversing valve, and the first electromagnetic reversing valve is connected to the rod chamber and the rodless chamber of the upper cylinder of the magnetic material press; one end of the return oil circuit is connected to the rod chamber of the upper cylinder of the magnetic material press, and the other end is connected to the oil tank; a first cartridge valve is provided between the return oil circuit and the oil tank, and the first cartridge valve is used to connect or cut off the rod chamber of the upper cylinder of the magnetic material press and the return oil circuit.
[0005] The upper oil cylinder protection hydraulic oil circuit provided by the utility model is provided with a first cartridge valve between the return oil circuit and the rod chamber of the upper oil cylinder of the magnetic material press. The first cartridge valve can cut off the rod chamber of the upper oil cylinder of the magnetic material press and the return oil circuit, so that the rod chamber of the upper oil cylinder of the magnetic material press can keep the hydraulic support push rod contracted, which has the advantages of reducing energy loss and improving the energy utilization efficiency of the oil circuit.
[0006] Furthermore, the oil return circuit is provided with a hydraulically controlled one-way valve and a second electromagnetic reversing valve, the hydraulically controlled one-way valve is used to receive the hydraulic oil output by the cartridge valve and deliver it to the second electromagnetic reversing valve, and the second electromagnetic reversing valve is connected to the oil tank through a pipeline.
[0007] By adopting the above technical solution, the second electromagnetic reversing valve is used to control whether the hydraulically controlled one-way valve is opened, thereby opening the oil return circuit.
[0008] Furthermore, the second electromagnetic reversing valve is also connected to a filling valve.
[0009] By adopting the above technical solution, a filling valve is provided to further lock the upper cylinder. When the first cartridge valve leaks, the filling valve plays a second protective role, reducing the natural falling of the push rod under the action of gravity.
[0010] Furthermore, a counterbalance valve is provided between the first electromagnetic reversing valve and the rod chamber of the oil cylinder on the magnetic material press, and one end of the counterbalance valve is connected to the first electromagnetic reversing valve, and the other end is connected to the first cartridge valve.
[0011] Furthermore, a second cartridge valve and a proportional servo valve are provided in sequence between the oil tank and the rodless chamber of the oil cylinder on the magnetic material press.
[0012] Furthermore, a filter is provided between the second cartridge valve and the rodless chamber of the oil cylinder of the magnetic material press.
[0013] By adopting the above technical solution, the hydraulic oil will carry debris and other sundries after multiple cycles of use, and the proportional servo valve is a relatively precise valve body. Therefore, a filter is provided between the second cartridge valve and the rodless chamber to filter out debris and other sundries, which on the one hand ensures the control accuracy of the proportional servo valve and on the other hand improves its service life.
[0014] Furthermore, a third cartridge valve is provided between the first electromagnetic reversing valve and the rodless chamber of the oil cylinder of the magnetic material press.
[0015] Furthermore, the oil inlet circuit is provided with a check valve, and the check valve is arranged between the first electromagnetic reversing valve and the oil pump.
[0016] By adopting the above technical solution and providing a check valve, the occurrence of hydraulic oil flowing back into the oil tank can be reduced.
[0017] Furthermore, an overflow valve is provided between the check valve and the oil tank.
[0018] By adopting the above technical solution, the hydraulic pressure of the entire upper cylinder oil circuit is controlled by setting an overflow valve. When the hydraulic pressure exceeds the preset value, part of the hydraulic pressure can flow to the oil tank through the overflow valve, which helps to maintain stable operation of the oil circuit.
[0019] In a second aspect, the utility model provides a magnetic material press, comprising any of the above-mentioned upper cylinder protection hydraulic oil circuits.
[0020] From the above, it can be seen that the upper cylinder protection hydraulic oil circuit provided by the utility model is provided with a first cartridge valve between the return oil circuit and the rod chamber of the upper cylinder of the magnetic material press. The first cartridge valve can cut off the rod chamber of the upper cylinder of the magnetic material press and the return oil circuit, so that the rod chamber of the upper cylinder of the magnetic material press can keep the hydraulic support push rod contracted, which has the advantages of reducing energy loss and improving the energy utilization efficiency of the oil circuit.
[0021] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 The utility model is a schematic diagram of an oil circuit of an upper cylinder protection hydraulic oil circuit according to an embodiment of the present invention.
[0023] Figure 2 The utility model is a schematic diagram of an oil circuit of another embodiment of an upper cylinder protection hydraulic oil circuit.
[0024] In the attached drawings: 100, oil tank; 200, oil pump; 300, oil inlet circuit; 310, first solenoid reversing valve; 320, counterbalance valve; 330, check valve; 340, overflow valve; 400, oil return circuit; 410, hydraulically controlled one-way valve; 420, second solenoid reversing valve; 500, first cartridge valve; 610, filter; 620, second cartridge valve; 630, proportional servo valve; 640, third cartridge valve. DETAILED DESCRIPTION
[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0026] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.
[0027] The utility model discloses an upper cylinder protection hydraulic oil circuit which is mainly used in the upper cylinder of a magnetic material press. The upper cylinder protection hydraulic oil circuit of the utility model can maintain the hydraulic pressure of the rod chamber of the upper cylinder when the oil pump is not operating, so that the push rod maintains the contraction action, which can reduce the energy loss of the oil circuit.
[0028] Reference Figure 1 In one embodiment, the upper cylinder protection hydraulic oil circuit includes an oil tank 100, an oil pump 200, an oil inlet oil circuit 300 and an oil return oil circuit 400; the oil tank 100 is connected to the oil pump 200 through a pipeline, the oil inlet oil circuit 300 is connected to the oil pump 200, and the oil inlet oil circuit 300 is provided with a first electromagnetic reversing valve 310, and the first electromagnetic reversing valve 310 is connected to the rod cavity and the rodless cavity of the upper cylinder of the magnetic material press; one end of the return oil circuit 400 is connected to the rod cavity of the upper cylinder of the magnetic material press, and the other end is connected to the oil tank 100; a first cartridge valve 500 is provided between the return oil circuit 400 and the oil tank 100, and the first cartridge valve 500 is used to conduct or cut off the rod cavity of the upper cylinder of the magnetic material press and the return oil circuit 400.
[0029] Specifically, the A3 port in the accompanying drawings is used to connect to the rod chamber of the oil cylinder on the magnetic material press, the B3 port is used to connect to the rodless chamber of the oil cylinder on the magnetic material press, the SG port is used to connect the filling valve, the PGA port, PSA port, PG port, PG3 port, and PS port are used to connect to a pressure gauge to measure the oil pressure, the P port is the oil inlet port, and the T port is the oil return port.
[0030] From the above, it can be seen that the upper cylinder protection hydraulic oil circuit provided by the utility model is provided with a first cartridge valve between the return oil circuit and the rod chamber of the upper cylinder of the magnetic material press. The first cartridge valve can cut off the rod chamber of the upper cylinder of the magnetic material press and the return oil circuit, so that the rod chamber of the upper cylinder of the magnetic material press can keep the hydraulic support push rod contracted, which has the advantages of reducing energy loss and improving the energy utilization efficiency of the oil circuit.
[0031] In one embodiment, the return oil circuit 400 is provided with a hydraulically controlled one-way valve 410 and a second solenoid reversing valve 420. The hydraulically controlled one-way valve 410 is used to receive the hydraulic oil output by the first cartridge valve 500 and transport it to the second solenoid reversing valve 420. The second solenoid reversing valve 420 is connected to the oil tank 100 through a pipeline.
[0032] By adopting the above technical solution, the second electromagnetic reversing valve 420 is used to control whether the hydraulically controlled one-way valve is opened, thereby opening the oil return circuit 400.
[0033] In one embodiment, the second electromagnetic reversing valve 420 is also connected to a filling valve.
[0034] By adopting the above technical solution, a filling valve is provided to further lock the upper cylinder. When the first cartridge valve 500 leaks, the filling valve plays a second protection role to reduce the natural falling of the push rod under the action of gravity.
[0035] In one embodiment, a counterbalance valve 320 is provided between the first electromagnetic reversing valve 310 and the rod chamber of the oil cylinder of the magnetic material press, and one end of the counterbalance valve 320 is connected to the first electromagnetic reversing valve 310 , and the other end is connected to the first cartridge valve 500 .
[0036] In one embodiment, a second cartridge valve 620 and a proportional servo valve 630 are sequentially provided between the oil tank 100 and the rodless chamber of the oil cylinder of the magnetic material press.
[0037] Reference Figure 2 In one embodiment, a filter 610 is provided between the second cartridge valve 620 and the rodless chamber of the upper cylinder of the magnetic material press.
[0038] By adopting the above technical solution, the hydraulic oil will carry debris and other sundries after multiple cycles of use, and the proportional servo valve 630 is a relatively precise valve body. Therefore, a filter 610 is provided between the second cartridge valve 620 and the rodless chamber to filter out debris and other sundries, which ensures the control accuracy of the proportional servo valve 630 on the one hand and improves its service life on the other.
[0039] In one embodiment, a third cartridge valve 640 is provided between the first electromagnetic reversing valve 310 and the rodless chamber of the upper cylinder of the magnetic material press.
[0040] In one embodiment, the oil inlet circuit 300 is provided with a check valve 330 , and the check valve 330 is arranged between the first electromagnetic reversing valve 310 and the oil pump 200 .
[0041] By adopting the above technical solution, the check valve 330 is provided to reduce the occurrence of hydraulic oil flowing back to the oil tank 100 .
[0042] In one embodiment, a relief valve 340 is provided between the check valve 330 and the oil tank 100 .
[0043] By adopting the above technical solution, the hydraulic pressure of the entire upper cylinder oil circuit is controlled by setting the overflow valve 340. When the hydraulic pressure exceeds the preset value, part of the hydraulic pressure can flow to the oil tank through the overflow valve 340, which helps to maintain the stable operation of the oil circuit.
[0044] Specifically, when the push rod retracts, the hydraulic oil in the oil tank 100 is pumped by the oil pump 200 in sequence through the one-way valve 330, the first solenoid reversing valve 310, the counter-valve 320 and the first cartridge valve 500, and finally enters the rod chamber, at which time the second solenoid reversing valve 420 is in a closed state; the hydraulic oil in the rodless chamber flows back to the oil tank 100 through the filter 610, the second cartridge valve 620 and the proportional servo valve 630 in sequence.
[0045] When the ejector rod needs to be kept retracted, the first cartridge valve 500 disconnects the connection between the rod chamber and the oil return passage 400 .
[0046] When the push rod needs to be extended, the hydraulic pressure in the oil tank 100 is pumped by the oil pump 200 in sequence through the one-way valve 330, the first solenoid reversing valve 310 and the third cartridge valve 640, and finally enters the rodless chamber; the hydraulic oil in the rod chamber flows back to the oil tank 100 through the first cartridge valve 500, the hydraulically controlled one-way valve 410, and the second solenoid reversing valve 420 in sequence.
[0047] The utility model also provides a magnetic material press, comprising the upper oil cylinder protection hydraulic oil circuit of any one of the above embodiments.
[0048] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0049] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.
Claims
1. An upper cylinder protection hydraulic oil circuit, characterized in that: include: An oil tank (100), an oil pump (200), an oil inlet circuit (300) and an oil return circuit (400); the oil tank (100) is connected to the oil pump (200) via a pipeline, the oil inlet circuit (300) is connected to the oil pump (200), the oil inlet circuit (300) is provided with a first electromagnetic reversing valve (310), the first electromagnetic reversing valve (310) is connected to the rod chamber and the rodless chamber of the oil cylinder on the magnetic material press; one end of the oil return circuit (400) is connected to the rod chamber of the oil cylinder on the magnetic material press, and the other end is connected to the oil tank (100); a first cartridge valve (500) is provided between the oil return circuit (400) and the oil tank (100), the first cartridge valve (500) is used to conduct or cut off the rod chamber of the oil cylinder on the magnetic material press and the oil return circuit (400).
2. The upper cylinder protection hydraulic oil circuit according to claim 1 is characterized in that: The oil return circuit (400) is provided with a hydraulically controlled one-way valve (410) and a second electromagnetic reversing valve (420). The hydraulically controlled one-way valve (410) is used to receive the hydraulic oil output by the first cartridge valve (500) and deliver it to the second electromagnetic reversing valve (420). The second electromagnetic reversing valve (420) is connected to the oil tank (100) via a pipeline.
3. The upper cylinder protection hydraulic oil circuit according to claim 2 is characterized in that: The second electromagnetic reversing valve (420) is also connected to a liquid filling valve.
4. The upper cylinder protection hydraulic oil circuit according to claim 1, characterized in that: A counterbalance valve (320) is provided between the first electromagnetic reversing valve (310) and the rod chamber of the oil cylinder on the magnetic material press; one end of the counterbalance valve (320) is connected to the first electromagnetic reversing valve (310), and the other end is connected to the first cartridge valve (500).
5. The upper cylinder protection hydraulic oil circuit according to claim 1, characterized in that: A second cartridge valve (620) and a proportional servo valve (630) are provided in sequence between the oil tank (100) and the rodless chamber of the oil cylinder on the magnetic material press.
6. The upper cylinder protection hydraulic oil circuit according to claim 5, characterized in that: A filter (610) is provided between the second cartridge valve (620) and the rodless chamber of the upper oil cylinder of the magnetic material press.
7. The upper cylinder protection hydraulic oil circuit according to claim 1, characterized in that: A third cartridge valve (640) is provided between the first electromagnetic reversing valve (310) and the rodless chamber of the upper oil cylinder of the magnetic material press.
8. The upper cylinder protection hydraulic oil circuit according to claim 1, characterized in that: The oil inlet circuit (300) is provided with a check valve (330), and the check valve (330) is arranged between the first electromagnetic reversing valve (310) and the oil pump (200).
9. The upper cylinder protection hydraulic oil circuit according to claim 8, characterized in that: A relief valve (340) is provided between the check valve (330) and the oil tank (100).
10. A magnetic material press, characterized in that: The invention comprises the upper cylinder protection hydraulic oil circuit as described in any one of claims 1 to 9.