Electro-hydraulic composite pressure cylinder with pressure relief function

Abstract

The utility model discloses an electro-hydraulic composite pressure cylinder with a pressure relief function. The electro-hydraulic composite pressure cylinder comprises a base body, a pre-pressing cylinder, a pressure cylinder, a liquid storage container and a pressure relief device assembled on the base body. A control channel, a pressurizing channel used for communicating the pre-pressing cylinder and the pressurizing cylinder, a first liquid flow channel communicating with the pressurizing channel and a second liquid flow channel separated from the first liquid flow channel are formed in the base body. The liquid storage container is respectively communicated with the first liquid flow channel and the second liquid flow channel by virtue of a control channel; a piston rod of the pressurizing cylinder can stretch into the pre-pressing cylinder from the pressurizing channel, communication between the pressurizing channel and the first liquid flow channel is closed in the process that the piston rod of the pressurizing cylinder stretches into the pre-pressing cylinder, and communication between the control channel and the second liquid flow channel can be opened or closed through the pressure relief device. The electro-hydraulic composite pressure cylinder can quickly reduce system pressure and increase liquid passing paths, so that the liquid return resistance of the system is reduced, and the speed of the electro-hydraulic composite pressure cylinder is increased.

Description

Technical Field

[0001] This utility model relates to a booster cylinder, and more particularly to an electro-hydraulic composite booster cylinder with pressure relief function that can be applied to mold closing applications, but is not limited thereto. Background Technology

[0002] As is well known, pulp forming machines involve processes such as wet blank forming, hot pressing and shaping of wet blanks to form dry blanks, and trimming of dry blanks to form initial products.

[0003] In the process of wet blank forming and wet blank hot pressing, the use of a pressure cylinder is indispensable. The pressure cylinder serves as the power source for mold opening and closing, providing pressure and holding effect for the formed workpiece.

[0004] However, existing booster cylinders have drawbacks such as high system return oil resistance and slow depressurization speed after boosting, which affect the speed of the booster cylinder.

[0005] Therefore, it is necessary to provide an electro-hydraulic composite booster cylinder with pressure relief function to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of this invention is to provide an electro-hydraulic composite booster cylinder with pressure relief function, which can quickly reduce system pressure, increase the fluid passage, thereby reducing system return resistance and improving the speed of the electro-hydraulic composite booster cylinder of this invention.

[0007] To achieve the above objectives, the electro-hydraulic composite booster cylinder with pressure relief function of this utility model includes a base, a pre-pressurization cylinder, a booster cylinder, a liquid storage container, and a pressure relief device mounted on the base. The base has a control channel, a booster channel connecting the pre-pressurization cylinder and the booster cylinder, a first liquid flow channel connected to the booster channel, and a second liquid flow channel arranged separately from the first liquid flow channel. The liquid storage container is connected to the first and second liquid flow channels via the control channel. The piston rod of the booster cylinder can extend into the pre-pressurization cylinder from the booster channel. During the extension of the piston rod into the pre-pressurization cylinder, the connection between the booster channel and the first liquid flow channel is closed. The pressure relief device can open or close the connection between the control channel and the second liquid flow channel.

[0008] Compared with the prior art, the electro-hydraulic composite booster cylinder of this utility model can quickly reduce the system pressure and increase the liquid flow path by adding a pressure relief device, a first liquid flow channel, a second liquid flow channel and a control channel between the liquid storage container and the pre-pressurization cylinder. That is, the liquid medium in the pre-pressurization cylinder can flow back to the liquid storage container in two ways. One way is from the second liquid flow channel and the control channel to the liquid storage container, and the other way is from the booster channel, the first liquid flow channel and the control channel to the liquid storage container. This reduces the system return resistance and improves the speed of the electro-hydraulic composite booster cylinder of this utility model.

[0009] Preferably, the pressure relief device is a two-position two-way solenoid valve.

[0010] Preferably, the pressure relief device is a telescopic actuator, the output end of which extends into the control channel from the end of the control channel away from the liquid storage container in a cooperative manner, and the output end of the telescopic actuator closes the connection between the control channel and the second liquid flow channel during the process of moving closer to the liquid storage container.

[0011] Preferably, the telescopic actuator is arranged opposite to the liquid storage container with the base as the center, and the liquid storage container is also fixedly connected to the base.

[0012] Preferably, the telescopic actuator is a pneumatic cylinder, a hydraulic cylinder, or an electric push rod.

[0013] Preferably, the substrate is clamped between the cylinder bodies of the booster cylinder and the pre-pressurization cylinder, and the liquid storage container is arranged side by side with the cylinder body of the booster cylinder or the cylinder body of the pre-pressurization cylinder.

[0014] Preferably, both the first fluid flow channel and the second fluid flow channel extend along a first direction, which intersects the sliding direction of the piston rod of the booster cylinder.

[0015] Preferably, the control channel extends along the sliding direction of the piston rod of the booster cylinder.

[0016] Preferably, both the first and second liquid flow channels are perpendicular to the control channel.

[0017] Preferably, the liquid storage container is a liquid storage cylinder. Attached Figure Description

[0018] Figure 1 This is a plan view of the electro-hydraulic composite booster cylinder of this utility model when the piston rod of the booster cylinder opens to connect the booster channel and the first liquid flow channel, and when the pressure relief device opens to connect the second liquid flow channel and the control channel.

[0019] Figure 2 Is Figure 1A plan view of the hidden liquid flow medium.

[0020] Figure 3 This is a plan view of the electro-hydraulic composite booster cylinder of this utility model when the piston rod of the booster cylinder closes the connection between the booster channel and the first liquid flow channel, and the pressure relief device closes the connection between the second liquid flow channel and the control channel.

[0021] Figure 4 Is Figure 3 A plan view of the hidden liquid flow medium. Detailed Implementation

[0022] The preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

[0023] Please see Figures 1 to 4 The electro-hydraulic composite booster cylinder 100 of this utility model includes a base 10, a pre-pressurization cylinder 20, a booster cylinder 30, a liquid storage container 40, and a pressure relief device 50 mounted on the base 10. The base 10 provides support for the pressure relief device 50 and a mounting location. The base 10 contains a control channel 11, a booster channel 12 connecting the pre-pressurization cylinder 20 and the booster cylinder 30, a first liquid flow channel 13 connected to the booster channel 12, and a second liquid flow channel 14 arranged separately from the first liquid flow channel 13. Optionally, in… Figures 1 to 4 In this example, the first liquid flow channel 13 and the second liquid flow channel 14 both extend along a first direction (as shown by arrow B), which intersects with the sliding direction of the piston rod 31 of the booster cylinder 30. The control channel 11 extends along the sliding direction of the piston rod 31 of the booster cylinder 30 (as shown by double arrow A), such that the first liquid flow channel 13 and the second liquid flow channel 14 are each perpendicular to the control channel 11, thereby making the arrangement of the control channel 11, the booster channel 12, the first liquid flow channel 13, and the second liquid flow channel 14 on the base 10 more reasonable and compact. Obviously, according to actual needs, the relationship between the control channel 11, the booster channel 12, the first liquid flow channel 13, and the second liquid flow channel 14 can be other than that, so it is not considered as such. Figures 1 to 4 The above is the limit.

[0024] Meanwhile, the liquid storage container 40 is connected to the first liquid flow channel 13 and the second liquid flow channel 14 via the control channel 11 to meet the flow requirements of the liquid medium 200 between the liquid storage container 40 and the pre-compression cylinder 20. The piston rod 31 of the booster cylinder 30 can extend into the pre-compression cylinder 20 from the booster channel 12. During the process of extending into the pre-compression cylinder 20, the piston rod 31 of the booster cylinder 30 closes the connection between the booster channel 12 and the first liquid flow channel 13 to meet the need for the piston rod 31 of the booster cylinder 30 to boost the pressure of the pre-compression cylinder 20.

[0025] The pressure relief device 50 can open or close the connection between the control channel 11 and the second liquid flow channel 14. When the piston rod 31 of the booster cylinder 30 pressurizes the pre-pressurization cylinder 20, the pressure relief device 50 closes the connection between the control channel 11 and the second liquid flow channel 14, as shown in the diagram. Figure 3 As shown; conversely, when the piston rod 31 of the booster cylinder 30 releases to boost the pressure of the pre-pressurization cylinder 20, the pressure relief device 50 opens the connection between the control channel 11 and the second liquid flow channel 14, as shown in the diagram. Figure 1 As shown.

[0026] Therefore, during the pressurization process, the pressure relief device 50 closes the connection between the control channel 11 and the second liquid flow channel 14, and the piston rod 31 of the pressurization cylinder 30 slides into the pressurization channel 12 in the direction of extending into the pre-pressurization cylinder 20. This closes the connection between the pressurization channel 12 and the first liquid flow channel 13, thereby achieving the purpose of pressurizing the piston rod 22 of the pre-pressurization cylinder 20. (See the attached diagram for details.) Figure 3 As shown.

[0027] Conversely, during the depressurization process, the depressurization device 50 opens the connection between the control channel 11 and the second liquid flow channel 14, allowing the liquid medium 200 in the pre-compression cylinder 20 to flow back into the storage container 40 sequentially along the second liquid flow channel 14 and the control channel 11; the piston rod 31 of the booster cylinder 30 slides away from the pre-compression cylinder 20, thereby opening the connection between the booster channel 12 and the first liquid flow channel 13, thus allowing the liquid medium 200 in the pre-compression cylinder 20 to flow back into the storage container 40 sequentially along the booster channel 12, the first liquid flow channel 13, and the control channel 11, as shown in the diagram. Figure 1 As shown. More specifically, as follows:

[0028] like Figures 1 to 4 As shown, as an example, the base 10 is clamped between the cylinder body 32 of the booster cylinder 30 and the cylinder body 21 of the pre-compression cylinder 20, such that the cylinder body 32 of the booster cylinder 30 is arranged opposite to the cylinder body 21 of the pre-compression cylinder 20 with the base 10 as the center, for example, but not limited to Figures 1 to 4 The vertical arrangement shown connects the cylinder body 32 of the booster cylinder 30, the base 10, and the cylinder body 21 of the pre-pressurization cylinder 20 in series. Furthermore, the liquid storage container 40 is arranged side-by-side with the cylinder body 32 of the booster cylinder 30 to ensure a more compact arrangement. Obviously, depending on actual needs, the liquid storage container 40 can also be arranged side-by-side with the cylinder body 21 of the pre-pressurization cylinder 20; therefore, it is not necessary to... Figures 1 to 4 The description is limited to the examples shown. Furthermore, the liquid storage container 40 is arranged relative to the telescopic actuator described below, with the base 10 as its center, for example, but not limited to... Figures 1 to 4The liquid storage container 40 is arranged vertically relative to the base 10, and the base 10 provides support for the liquid storage container 40.

[0029] like Figures 1 to 4 As shown, as an example, the pressure relief device 50 is a telescopic actuator, that is, the reference numeral 50 in the attached diagram also indicates a telescopic actuator. The output end 51 of the telescopic actuator 50 extends into the control channel 11 from the end of the control channel 11 away from the liquid storage container 40 in a cooperative manner. During the process of moving closer to the liquid storage container 40, the output end 51 of the telescopic actuator 50 closes the connection between the control channel 11 and the second liquid flow channel 14. The state is shown in the figure. Figure 3 and Figure 4 As shown, in this state, the liquid medium 200 in the pre-compression cylinder 20 is blocked from flowing back into the control channel 11 via the second liquid flow channel 14 and the control channel 11, ensuring the reliability of pressurizing the pre-compression cylinder 20. Specifically, in Figures 1 to 4 In the example shown, the telescopic actuator 50 is a cylinder. Obviously, depending on the actual needs, the telescopic actuator 50 can also be a hydraulic cylinder, an electric push rod, or a two-position two-way solenoid valve. Therefore, it is not considered as such. Figures 1 to 4 The above is the limit.

[0030] For example Figures 1 to 4 As shown, as an example, the liquid storage container 40 is a liquid storage cylinder to simplify its structure. Obviously, depending on actual needs, the liquid storage container 40 can also have other structures, so it is not considered... Figures 1 to 4 The above is the limit.

[0031] Compared with the prior art, the electro-hydraulic composite booster cylinder 100 of this utility model can quickly reduce the system pressure and increase the liquid flow path by adding a pressure relief device 50, a first liquid flow channel 13, a second liquid flow channel 14 and a control channel 11 between the liquid storage container 40 and the pre-pressure cylinder 20. That is, the liquid medium 200 in the pre-pressure cylinder 20 can flow back to the liquid storage container 40 in two ways. One way is from the second liquid flow channel 14 and the control channel 11 to the liquid storage container 40, and the other way is from the booster channel 12, the first liquid flow channel 14 and the control channel 11 to the liquid storage container 40, thereby reducing the system return liquid resistance and increasing the speed of the electro-hydraulic composite booster cylinder 100 of this utility model.

[0032] The above-disclosed examples are merely preferred embodiments of the present utility model, intended to facilitate understanding and implementation by those skilled in the art. They should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application are still within the scope of the present utility model.

Claims

1. An electro-hydraulic composite booster cylinder with pressure relief function, comprising a base, a pre-pressurization cylinder, a booster cylinder, and a liquid storage container, characterized in that, The electro-hydraulic composite booster cylinder also includes a pressure relief device mounted on the base. The base has a control channel, a booster channel for connecting the pre-pressurization cylinder and the booster cylinder, a first liquid flow channel connected to the booster channel, and a second liquid flow channel arranged separately from the first liquid flow channel. The liquid storage container is connected to the first liquid flow channel and the second liquid flow channel respectively via the control channel. The piston rod of the booster cylinder can extend into the pre-pressurization cylinder from the booster channel. During the process of the piston rod of the booster cylinder extending into the pre-pressurization cylinder, the connection between the booster channel and the first liquid flow channel is closed. The pressure relief device can open or close the connection between the control channel and the second liquid flow channel.

2. The electro-hydraulic composite booster cylinder according to claim 1, characterized in that, The pressure relief device is a two-position two-way solenoid valve.

3. The electro-hydraulic composite booster cylinder according to claim 1, characterized in that, The pressure relief device is a telescopic actuator. The output end of the telescopic actuator extends into the control channel from the end of the control channel away from the liquid storage container. When the output end of the telescopic actuator moves closer to the liquid storage container, it closes the connection between the control channel and the second liquid flow channel.

4. The electro-hydraulic composite booster cylinder according to claim 3, characterized in that, The telescopic actuator is arranged opposite to the liquid storage container with the base as the center, and the liquid storage container is also fixedly connected to the base.

5. The electro-hydraulic composite booster cylinder according to claim 3, characterized in that, The telescopic actuator is a pneumatic cylinder, a hydraulic cylinder, or an electric push rod.

6. The electro-hydraulic composite booster cylinder according to claim 1, characterized in that, The substrate is clamped between the cylinder bodies of the booster cylinder and the pre-pressurization cylinder, and the liquid storage container is arranged side by side with the cylinder body of the booster cylinder or the cylinder body of the pre-pressurization cylinder.

7. The electro-hydraulic composite booster cylinder according to claim 1, characterized in that, The first liquid flow channel and the second liquid flow channel are both arranged to extend along a first direction, which intersects with the sliding direction of the piston rod of the booster cylinder.

8. The electro-hydraulic composite booster cylinder according to claim 1 or 7, characterized in that, The control channel extends along the sliding direction of the piston rod of the booster cylinder.

9. The electro-hydraulic composite booster cylinder according to claim 7, characterized in that, Both the first and second liquid flow channels are perpendicular to the control channel.

10. The electro-hydraulic composite booster cylinder according to claim 1, characterized in that, The liquid storage container is a liquid storage cylinder.

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