80MPa single-stage hydraulic supporting device

Abstract

The utility model relates to a 80MPa single-stage hydraulic supporting device which comprises a quick connector, a reversing handle, a reversing valve block with a hydraulic lock, a cylinder head, an outer oil cylinder, a left working head, a piston rod, an inner oil pipe, an inner plug and a right working head, the quick connector is connected with an external hydraulic source to provide power, and the reversing handle switches the telescopic action of the device. And when the oil supply pressure exceeds 10 MPa, the pressure conversion valve body acts and is converted into one-way high-pressure oil supply jacking and retraction, the manual pressure release valve is operated after the reversing handle is rotated, the passage states are switched in sequence, and resetting of the pressure conversion valve body and retraction of the piston rod are achieved. The device can resist pressure up to 80 MPa, has efficient extension and stable pressure bearing performance, and is widely applied to various operation scenes needing high-strength hydraulic support.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support devices, and in particular to an 80MPa single-stage hydraulic support device. Background Technology

[0002] Single-stage hydraulic support devices are used in disaster relief and rescue operations to move obstacles, support confined spaces to create rescue channels, and maintain the stability of objects. They are widely used in disaster relief and rescue operations for natural disasters such as earthquakes and mudslides, as well as non-natural disasters such as fires and explosions, and in search and rescue missions for buildings and structures.

[0003] The existing single-stage hydraulic support device has an excessively long support time and the support force cannot meet the needs of increasingly heavy load support scenarios, affecting the efficiency and quality of support and rescue operations. Utility Model Content

[0004] This utility model mainly addresses the problems of insufficient pressure resistance, slow cylinder extension speed, and inability to flexibly adapt to different working conditions in existing hydraulic support devices, and provides an 80MPa single-stage hydraulic support device.

[0005] The objective of this utility model is mainly achieved through the following solution:

[0006] An 80MPa single-stage hydraulic support device includes: a quick connector for connecting to an external hydraulic power source as a power input interface; a reversing handle, one end connected to the quick connector and the other end connected to a reversing valve block with a hydraulic lock, for switching the extension or retraction of the hydraulic support; a reversing valve block with a hydraulic lock, the internal oil passage of which is connected to a cylinder head via an oil pipe to control the oil supply path to the cylinder; a cylinder head, internally equipped with an oil passage connected to an outer cylinder and piston rod, for distributing hydraulic oil; and an outer cylinder, which accommodates the piston rod and provides it with extension and retraction space. The system includes a left and right working head, located on either side of the piston rod's extension and retraction direction for support operations; a piston rod that can move left and right within the outer cylinder to achieve support; an inner oil pipe and an inner plug for assisting in the construction and sealing of the internal oil circuit of the cylinder; a pressure switching valve body located in the oil supply circuit, which switches the oil supply mode when the oil supply pressure exceeds a set value, causing the piston rod to enter a one-way pressure-bearing state; and a manual pressure relief valve located in the small-section end circuit of the piston rod, used to release the high pressure in the pressure switching valve body when the piston retracts.

[0007] Preferably, the pressure switching valve body includes a pressure adjusting spring for adjusting the switching pressure.

[0008] Preferably, the set pressure of the pressure switching valve body is 10 MPa.

[0009] Preferably, the manual pressure relief valve has three sections, which control the on / off state of three passages respectively, so as to realize pressure relief and switching of oil supply direction.

[0010] Preferably, during the piston rod extension phase, the lowermost passage of the manual pressure relief valve remains open, while the uppermost and middle passages are closed.

[0011] Preferably, when the manual pressure relief valve is moved to the middle position, the valve core of the manual pressure relief valve makes the uppermost passage open, the middle passage closed, and the lowermost passage open. At this time, the high pressure zone in the pressure conversion valve body is connected to the right return oil pipeline to achieve pressure relief and reset.

[0012] Preferably, when the manual pressure relief valve is moved to the uppermost position, the valve core of the manual pressure relief valve closes the uppermost passage, opens the middle passage, and keeps the lowermost passage closed, so that the oil supply from below flows to the small cross-section end of the piston rod and avoids the pressure switching valve body from operating.

[0013] Therefore, compared with the prior art, the present invention has the following advantages:

[0014] (1) This utility model adopts a structural design with higher pressure resistance, which can withstand pressure up to 80MPa, and can adapt to more stringent support conditions, greatly improving the stability and working capacity of the rescue support.

[0015] (2) This utility model significantly improves the extension speed of the oil cylinder under the premise of the same oil supply flow by using the differential oil supply principle, effectively shortens the preparation time for operation and improves work efficiency;

[0016] (3) This utility model enables the device to flexibly switch the oil supply mode according to the working conditions by setting the pressure conversion valve body and the manual pressure relief valve. It can switch freely between low pressure differential oil supply for rapid extension and high pressure unidirectional oil supply for stable support, and can smoothly reset when the piston rod retracts, ensuring the stable operation and repeated use of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the oil circuit in this utility model where the set pressure is not reached during expansion;

[0019] Figure 3 This is a schematic diagram of the oil circuit in this utility model that reaches the set pressure during expansion;

[0020] Figure 4 This is a schematic diagram of the oil circuit in this utility model where the manual pressure relief is in the lower position during retraction;

[0021] Figure 5 This is a schematic diagram of the oil circuit in this utility model where manual pressure relief is in the neutral position during retraction;

[0022] Figure 6 This is a schematic diagram of the oil circuit in this utility model where the manual pressure relief is in the upper position during retraction.

[0023] Diagram description: 1-Quick connector, 2-Reversing handle, 3-Reversing valve block with hydraulic lock, 4-Cylinder head, 5-Outer cylinder, 6-Left working head, 7-Piston rod, 8-Inner oil pipe, 9-Inner plug, 10-Right working head. Detailed Implementation

[0024] The technical solution of this utility model will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0025] In this invention, unless otherwise specified, all parts and percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the field. Unless otherwise specified, the methods in the following embodiments are conventional methods in the field. Unless otherwise specified, the components or equipment in the following embodiments are general standard parts or components known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0026] like Figure 1 As shown, this utility model provides a technical solution: an 80MPa single-stage hydraulic support device, comprising:

[0027] Quick connector 1 is used to connect to an external hydraulic power source as a power input interface;

[0028] The reversing handle 2 is connected to the quick connector 1 at one end and to the reversing valve block 3 with a hydraulic lock at the other end, and is used to switch the extension or retraction of the hydraulic support.

[0029] The reversing valve block 3 with hydraulic lock has an internal oil passage hole connected to the cylinder head 4 via an oil pipe to control the oil supply path to the cylinder.

[0030] The cylinder head 4 has an internal oil passage that connects to the outer cylinder 5 and piston rod 7, and is used to distribute hydraulic oil.

[0031] The outer hydraulic cylinder 5 accommodates the piston rod 7 and provides it with space for extension and retraction;

[0032] The left working head 6 and the right working head 10 are respectively located on both sides of the piston rod 7 in the extension and retraction direction, and are used to achieve support operation;

[0033] Piston rod 7 can move left and right within outer cylinder 5 to achieve support action;

[0034] The inner oil pipe 8 and the inner plug 9 are used to assist in the construction and sealing of the internal oil passage of the oil cylinder;

[0035] It also includes a pressure switching valve body, which is installed in the oil supply circuit. The lower end of the pressure switching valve body is equipped with a pressure adjusting spring, which is used to adjust the oil circuit switching according to the oil supply pressure. When the oil supply pressure exceeds the set value, the oil supply mode is switched, so that the piston rod 7 enters a one-way pressure state. When the oil supply pressure is lower than the set pressure, hydraulic oil is simultaneously introduced into both sides of the piston rod 7 to enter a differential operation state. In this embodiment, the set pressure of the pressure switching valve body is 10MPa.

[0036] It also includes a manual pressure relief valve, which is installed in the small-section end circuit of the piston rod 7, and is used to release the high pressure in the pressure conversion valve body when the piston retracts.

[0037] Specifically, the manual pressure relief valve has three sections, each controlling the on / off state of three passages to achieve pressure relief and switching of oil supply direction. When the piston rod 7 is extended, the lowest passage of the manual pressure relief valve remains open, while the highest and middle passages are closed. When the manual pressure relief valve moves to the middle position, the valve core opens the highest passage, closes the middle passage, and keeps the lowest passage open. At this time, the high-pressure area in the pressure conversion valve body is connected to the right return oil line to achieve pressure relief and reset. When the manual pressure relief valve moves to the highest position, the valve core closes the highest passage, opens the middle passage, and keeps the lowest passage closed. The lower oil supply flows to the small section end of the piston rod 7 and prevents the pressure conversion valve body from operating.

[0038] This utility model provides an 80MPa single-stage hydraulic support device. When the piston needs to extend, the right-side oil supply circuit passes through the oil passage inside the cylinder head 4 to the right and left ends of the piston rod 7. The left-side return port is connected to the pressure conversion valve body through a one-way valve. The lower end of the pressure conversion valve body is a pressure adjustment spring, which can adjust the conversion pressure. When the pressure on the pressure conversion valve body is lower than 10MPa, the pressure conversion valve body does not move. The oil supply circuit passes through the annular groove on the pressure conversion valve body to the small-section end of the piston rod 7. At this time, hydraulic oil is supplied to both sides of the piston rod 7, and the piston rod enters a differential operation state. At this time, the extension speed of the piston rod is significantly faster than that of unilateral oil supply. The one-way valve passage is blocked by the lower part of the pressure conversion valve body and is in an open state, so it cannot perform unidirectional passage. When the piston rod 7 extends and is subjected to an external load, causing the internal hydraulic pressure to rise to 10MPa, the pressure acting on the annular groove at the upper part of the pressure conversion valve body pushes the lower spring to compress, causing the pressure conversion valve body to move downward. Figure 3As shown; the small section end of piston rod 7 is connected to the one-way valve, the original oil supply passage to the small section end of piston rod 7 is closed, the piston rod becomes one-way bearing hydraulic pressure and enters a high-pressure state to perform jacking operation.

[0039] When piston retraction is required, rotating the reversing handle 2 switches the oil supply and return states below, such as... Figure 4 As shown, a manual pressure relief valve is also connected in series in the small-section end circuit of piston rod 7. The manual pressure relief valve has three sections, which control the on / off state of three passages respectively. This manual pressure relief valve does not operate during the piston extension stage. The lowermost passage remains open during the piston extension stage, while the uppermost and middle passages are closed. Since the pressure conversion valve body is in the extended state under high pressure at this time, the one-way valve passage is open. At this time, the lower oil supply cannot supply oil to the small-section end of piston rod 7 through the one-way valve, and the piston rod cannot retract. Therefore, it is necessary to manually operate the manual pressure relief valve to move it upward. When it moves to the middle position, as... Figure 5 As shown, the special structural design of the manual pressure relief valve core ensures that the uppermost passage is open, the middle passage is closed, and the lowermost passage remains open. At this point, the lower oil supply cannot enter the small section end of the piston rod 7. However, the high-pressure zone within the pressure conversion valve body is connected to the right-side return oil line, allowing the high pressure within the pressure conversion valve body to be released and become low pressure. The pressure conversion valve body will then reset under the action of the lower spring, preparing for the next piston extension operation. When the manual pressure relief valve is operated further, moving it to the uppermost position, as... Figure 6 As shown, the uppermost passage is closed, the middle passage is open, and the lowermost passage remains closed. At this time, the oil supply flows to the small cross-section end of the piston rod 7. At the same time, the closed state of the lowermost passage also prevents pressure from being applied to the pressure conversion valve body, thus preventing the pressure conversion valve body from operating.

[0040] It should be understood that this embodiment is for illustrative purposes only and is not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A single-stage hydraulic support device with a pressure of 80MPa, characterized in that, include: Quick connector (1) is used to connect an external power hydraulic source as a power input interface; The reversing handle (2) is connected at one end to the quick connector (1) and at the other end to the reversing valve block (3) with a hydraulic lock, and is used to switch the extension or retraction of the hydraulic support. The reversing valve block (3) with hydraulic lock has an internal oil passage hole connected to the cylinder head (4) via an oil pipe to control the oil supply path to the cylinder; The cylinder head (4) has an internal oil passage that connects to the outer cylinder (5) and piston rod (7) for distributing hydraulic oil. The outer cylinder (5) accommodates the piston rod (7) and provides it with space for extension and retraction; The left working head (6) and the right working head (10) are respectively located on both sides of the piston rod (7) in the extension and retraction direction to achieve support operation; The piston rod (7) can move left and right within the outer cylinder (5) to achieve the supporting action; The inner oil pipe (8) and the inner plug (9) are used to assist in the construction and sealing of the internal oil passage of the oil cylinder; It also includes a pressure switching valve body, which is installed in the oil supply circuit. When the oil supply pressure exceeds the set value, the oil supply mode is switched so that the piston rod (7) enters a one-way pressure state. And a manual pressure relief valve, which is installed in the small section end circuit of the piston rod (7), is used to release the high pressure in the pressure conversion valve body when the piston retracts.

2. The 80MPa single-stage hydraulic support device according to claim 1, characterized in that, The pressure switching valve body includes a pressure adjusting spring for adjusting the switching pressure.

3. The 80MPa single-stage hydraulic support device according to claim 1, characterized in that, The set pressure of the pressure conversion valve body is 10 MPa.

4. The 80MPa single-stage hydraulic support device according to claim 1, characterized in that, The manual pressure relief valve has three sections, which control the on / off state of three passages respectively, so as to realize pressure relief and switching of oil supply direction.

5. The 80MPa single-stage hydraulic support device according to claim 4, characterized in that, During the extension phase of the piston rod (7), the lowermost passage of the manual pressure relief valve remains open, while the uppermost and middle passages are closed.

6. The 80MPa single-stage hydraulic support device according to claim 5, characterized in that, When the manual pressure relief valve is moved to the middle position, the valve core of the manual pressure relief valve opens the uppermost passage, closes the middle passage, and keeps the lowermost passage open. At this time, the high-pressure zone in the pressure conversion valve body is connected to the right return oil pipeline to achieve pressure relief and reset.

7. The 80MPa single-stage hydraulic support device according to claim 6, characterized in that, When the manual pressure relief valve is moved to the top position, the valve core of the manual pressure relief valve closes the top passage, opens the middle passage, and keeps the bottom passage closed. The oil supply from below flows to the small section end of the piston rod (7) and avoids the pressure switching valve body from operating.

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