Self-locking valve, lifting system and vehicle

Abstract

The utility model discloses a self-locking valve, a lifting system and a vehicle, the self-locking valve comprises a valve shell, a valve rod, a valve rod, a valve rod, a valve rod and a valve rod, the valve shell is provided with an inlet and an outlet, and an oil cavity is formed between the inlet and the outlet; the valve element is installed in the valve shell, the oil cavity surrounds the valve element, the valve element can move between a self-locking position and a circulation position, the valve element is provided with a valve element flow channel, the valve element flow channel is communicated with the outlet, when the valve element is located at the circulation position, the valve element flow channel is communicated with the oil cavity, and when the valve element is located at the circulation position, the valve element flow channel is communicated with the oil cavity. When the valve element is located at the self-locking position, the valve element runner and the oil cavity are closed. The self-locking valve has the advantages that the safety of the structure is improved, the safety of operators is protected, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a self-locking valve, a lifting system and a vehicle. Background Art

[0002] With the rapid development of hydraulic technology, lifting systems have been widely used in various fields. The lifting cylinder plays a very important role in the lifting system, which has brought great convenience to people. However, while bringing convenience, hydraulic components are greatly affected by temperature, and the working environment is complex. Hydraulic components are not easy to repair. Therefore, during operation, repair and maintenance, hydraulic oil pipe leakage and other reasons often cause serious consequences, and even endanger people’s lives and property safety.

[0003] In the lifting system of the related art, if the lifting cylinder of the lifting system breaks due to wear and other reasons, the cab or cargo box will flip back quickly. At this time, the operators below are unprepared and have no time to evacuate to a safe position, resulting in a major accident and serious safety hazards. Although safety support devices are used for protection, there is still no effective and reliable way to solve the problem of hydraulic cylinder failure and loss of control due to hydraulic oil pipe leakage due to factors such as the non-standard work process of the operators and the working environment. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a self-locking valve, which has the advantages of improving the safety of the structure and protecting the safety of operators.

[0005] A second aspect of the utility model provides a lifting system with a self-locking valve.

[0006] A third aspect of the utility model provides a vehicle with a lifting system.

[0007] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a self-locking valve is proposed, comprising: a valve housing, the valve housing is configured with an inlet and an outlet, and an oil chamber is formed between the inlet and the outlet; a valve core, the valve core is installed in the valve housing, the oil chamber surrounds the valve core, the valve core is movable between a self-locking position and a flow position, the valve core is configured with a valve core flow channel, the valve core flow channel is connected to the outlet, the valve core flow channel is connected to the oil chamber when the valve core is in the flow position, and the valve core flow channel and the oil chamber are closed when the valve core is in the self-locking position.

[0008] According to the self-locking valve of the embodiment of the utility model, the self-locking function of the lifting cylinder can be realized through the valve core. When the upward pressure on the valve core is greater than the downward pressure, the valve core will move upward, and the oil passes through the self-locking valve structure at a stable flow rate. The valve core inside the self-locking valve is in a balanced state, and the oil can circulate normally. When the pressure in the self-locking valve is greatly relieved, the downward pressure on the valve core is greater than its upward pressure, and the valve core loses its original pressure balance. Affected by the gravity of the cab itself, the compression speed of the lifting cylinder gradually increases, and the valve core moves downward to the lowest end of the self-locking valve. The valve core blocks the inlet of the valve shell, so that the lifting cylinder is in the self-locking position and will not continue to move downward. By adjusting the flow of oil in the self-locking valve and the range of motion of the valve core, the position of the fixed lifting cylinder can be adjusted, and the cab can still be safely and reliably fixed in the lifting position, thereby improving the safety of the structure. In addition, by improving the stability of the fixing of the lifting cylinder and the cab, the lifting cylinder can be locked when a failure occurs in the lifting cylinder, effectively protecting the personal safety of the operator.

[0009] Therefore, the self-locking valve according to the embodiment of the utility model has the advantages of improving the safety of the structure and protecting the safety of operators.

[0010] According to some specific embodiments of the present invention, the self-locking valve further includes: an elastic member, which is installed in the valve housing, and two ends of the elastic member are respectively stopped at the valve housing and the valve core to apply elastic force to the valve core.

[0011] According to some specific embodiments of the present utility model, a limiting column is constructed at one end of the valve core facing the inlet, and the elastic member is sleeved on the limiting column.

[0012] According to some specific embodiments of the present utility model, the valve housing includes: a first valve housing, the oil chamber is formed in the first valve housing, the valve core is installed in the first valve housing, and the inlet is formed in the first valve housing; a second valve housing, the second valve housing is closed at one end of the first valve housing and is threadedly connected to the first valve housing, and the outlet is formed in the second valve housing.

[0013] According to some specific embodiments of the present utility model, the first valve housing is constructed with an inner housing wall and an outer housing wall, the oil chamber is formed between the inner housing wall and the outer housing wall, the valve core is installed in the inner housing wall, and the inner housing wall connects the inlet and the oil chamber, and the outlet and the oil chamber.

[0014] According to some specific embodiments of the present utility model, the inner shell wall is configured with a guide hole connected to the oil chamber on the outer peripheral side of the elastic member, and the oil chamber flows into the inner shell wall through the guide hole to push the valve core to move.

[0015] According to some specific embodiments of the present utility model, the valve core flow channel includes: a radial valve core flow channel, which radially penetrates the valve core, and when the valve core moves to the flow position, the radial valve core flow channel is connected to the oil chamber; an axial valve core flow channel, and the two ends of the axial valve core flow channel are respectively connected to the outlet and the radial valve core flow channel.

[0016] According to some specific embodiments of the present utility model, there are multiple axial valve core flow channels and multiple radial valve core flow channels, and the radial valve core flow channels are connected to the axial valve core flow channels on both radial sides of the valve core.

[0017] According to an embodiment of the second aspect of the utility model, a lifting system is proposed, comprising: a lifting cylinder, wherein the lifting cylinder is provided with an oil inlet; a self-locking valve according to the above embodiment of the utility model, wherein the self-locking valve is connected to the oil inlet of the lifting cylinder; and an oil pump, wherein the self-locking valve is connected to the oil pump via the lifting cylinder.

[0018] The lifting system according to the embodiment of the utility model has the advantages of improving the safety of the structure and protecting the safety of the operators by utilizing the self-locking valve according to the embodiment of the utility model.

[0019] According to an embodiment of the third aspect of the utility model, a vehicle is provided, comprising a lifting system according to the above embodiment of the utility model.

[0020] The vehicle according to the embodiment of the utility model has the advantages of improving the safety of the structure and protecting the safety of the operators by utilizing the lifting system according to the embodiment of the utility model.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 It is a structural schematic diagram of a self-locking valve according to an embodiment of the utility model;

[0024] Figure 2 It is a structural schematic diagram of a lifting system according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] Self-locking valve 1, valve housing 100, valve core 200, elastic member 300, first valve housing 110, second valve housing 120,

[0027] Inner shell wall 111, outer shell wall 112, inlet 101, outlet 102, oil chamber 103, guide hole 104, limit column 201,

[0028] Valve core flow channel 210, radial valve core flow channel 211, axial valve core flow channel 212,

[0029] Lifting system 10, lifting cylinder 11, oil pump 12. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0033] In the description of the present invention, "multiple" means two or more, and "several" means one or more.

[0034] The self-locking valve 1 according to an embodiment of the present utility model is described below with reference to the accompanying drawings.

[0035] like Figure 1 and Figure 2 As shown, the self-locking valve 1 according to the embodiment of the utility model includes a valve housing 100 and a valve core 200 .

[0036] The valve housing 100 is configured with an inlet 101 and an outlet 102, and an oil chamber 103 is formed between the inlet 101 and the outlet 102. The valve core 200 is installed in the valve housing 100, and the oil chamber 103 surrounds the valve core 200. The valve core 200 is movable between a self-locking position and a flow position. The valve core 200 is configured with a valve core flow channel, and the valve core flow channel is connected to the outlet 102. When the valve core 200 is in the flow position, the valve core flow channel is connected to the oil chamber 103. When the valve core 200 is in the self-locking position, the valve core flow channel 210 and the oil chamber 103 are closed.

[0037] For example, the oil enters the oil chamber 103 through the inlet 102 of the valve housing 100, and then flows into the valve core 200 from the outer peripheral side of the valve housing 100 to better control the pressure on the valve core 200. The pressure P1 generated by the lower part of the valve housing 100 on the valve core 200, and the pressure P2 generated by the upper part of the valve housing 100 on the valve core 200, when the lifting cylinder is pressed, when P1 is greater than P2, the valve core 200 moves in the outlet direction, the valve core is connected to the inlet 101, the valve core flow channel 210 and the outlet 102 in the flow position, the oil passes through the self-locking valve 1 at a stable flow rate, the valve core 200 is in a state of pressure balance, the lifting cylinder 11 performs a normal lifting movement, and the valve core 200 is in the flow position. When P1 is less than P2, the valve core 200 loses pressure balance. Affected by the gravity of the cab itself, the valve core 200 loses pressure balance. Affected by the gravity of the cab or the cargo box itself, the compression speed of the lifting cylinder 11 gradually increases. At this time, the pressure on the upper part of the valve shell 100 is greater than the pressure on the lower part of the valve shell 100. The valve core 200 moves toward the inlet direction, and the valve core 200 blocks the inlet 101. At this time, the lifting cylinder 11 is in a pressure-maintaining state, the cab or the cargo box will not continue to fall back, and the valve core 200 is in a self-locking position.

[0038] According to the self-locking valve 1 of the embodiment of the utility model, the self-locking function of the lifting cylinder 11 can be realized through the valve core 200. When the upward pressure on the valve core 200 is greater than the downward pressure, the valve core 200 will move upward, connecting the inlet 101, the valve core channel 210 and the outlet 102. The oil passes through the self-locking valve 1 structure at a stable flow rate. The valve core 200 inside the self-locking valve 1 is in a balanced state, and the oil can circulate normally. When the pressure in the self-locking valve 1 is greatly relieved, the pressure at the outlet of the valve core 200 is greater than the pressure at its inlet, and the valve core 200 loses its original pressure balance. Affected by the gravity of the cab or cargo box, the compression speed of the lifting cylinder 11 gradually increases, and the valve core 200 moves downward to the lowest end of the self-locking valve 1. The valve core 200 blocks the inlet 101 of the valve housing 100, so that the lifting cylinder 11 is in the self-locking position. The pressure at the outlet will not continue to be transmitted to the pipeline at the inlet, but will be blocked by the valve core 200, so that the lifting cylinder will not lose force, but will remain in a safe position without flipping. By adjusting the flow of oil in the self-locking valve 1 and the range of motion of the valve core 200, the position of the fixed lifting cylinder can be adjusted, and the cab or cargo box can still be safely and reliably fixed in the lifting position, thereby improving the safety of the structure.

[0039] Furthermore, since the oil cavity surrounds the valve core 200, the oil flowing in from the inlet does not directly exert pressure on the valve core, but first reaches the oil cavity 103 and then flows inward from the oil cavity 103 into the inner peripheral side of the valve core 200. When a sudden pressure change occurs, the valve core 200 can withstand a greater pressure.

[0040] Therefore, the self-locking valve 1 according to the embodiment of the utility model has the advantages of improving the safety of the structure and protecting the safety of the operators.

[0041] In some specific embodiments of the present invention, Figure 1 As shown, the self-locking valve 1 also includes an elastic member 300. The elastic member 300 is installed in the valve housing 100, and the two ends of the elastic member 300 are respectively stopped at the valve housing 100 and the valve core 200 to apply elastic force to the valve core 200. By applying appropriate elastic force through the elastic member 300, the position of the valve core 200 can be stably controlled. When the lifting cylinder 11 is working normally, the elastic force applied to the valve core 200 by the elastic member 300 can keep the valve core 200 in the desired position, ensuring the stability and working effect of the valve core 200. If the lifting cylinder is leaking due to a fault, the pressure at the lower part of the valve housing 100 is greater than the pressure at the upper part of the valve housing 100, and the valve core 200 will compress the elastic member 300 downward, effectively closing the inlet 101 of the valve housing 100, ensuring that the self-locking valve 1 is in the self-locking position, so that the lifting cylinder 11 is in a fixed position, improving the safety and reliability of the overall structure.

[0042] In some specific embodiments of the present invention, Figure 1 As shown, a limiting column 201 is constructed at one end of the valve core 200 facing the inlet 101, and the elastic member 300 is sleeved on the limiting column 201. The limiting column 201 can provide additional support for the valve core 200, enhance the stability of the valve core 200 structure, resist the influence of external pressure or vibration, maintain the correct position of the valve core 200, and improve the stability and safety of the self-locking valve 1. By sleeved the elastic member 300 on the limiting column 201, the elastic force can be applied to the valve core 200 more stably, and the position of the valve core 200 in the flow position or the self-locking position can be kept stable. With the support of the limiting column 201, the elastic member 300 can more accurately adjust the elastic force of the valve core 200, and achieve more precise control of the self-locking valve 1.

[0043] In some specific embodiments of the present invention, Figure 1 As shown, the valve housing 100 includes a first valve housing 110 and a second valve housing 120. An oil chamber 103 is formed in the first valve housing 110, a valve core 200 is installed in the first valve housing 110, an inlet 101 is formed in the first valve housing 110. The second valve housing 120 is closed at one end of the first valve housing 110 and is threadedly connected to the first valve housing 110, and an outlet 102 is formed in the second valve housing 120.

[0044] The oil chamber 103 formed in the first valve housing 110 can effectively isolate the direct contact between the valve core 200 and the oil, ensuring that the oil is effectively controlled and regulated inside the valve housing 100. At the same time, the formation of the oil chamber 103 helps prevent external impurities or media from entering the valve core 200, maintaining the normal operation of the self-locking valve 1. And the threaded connection provides a strong connection strength, so that the first valve housing 110 and the second valve housing 120 can be firmly connected together. Under the pressure borne by the self-locking valve 1 during operation, the threaded connection can effectively process the internal structure and keep the structure of the self-locking valve 1 intact, ensuring that the self-locking valve 1 can operate normally. At the same time, the threaded connection has a relatively simple structural design, and the installation and disassembly process is relatively convenient and quick, which is more convenient during maintenance.

[0045] In some specific embodiments of the present invention, Figure 1 As shown, the first valve housing 110 is constructed with an inner housing wall 111 and an outer housing wall 112, an oil chamber 103 is formed between the inner housing wall 111 and the outer housing wall 112, and the valve core 200 is installed in the inner housing wall 111, and the inner housing wall 111 communicates the inlet 101 with the oil chamber 103, and the outlet 102 with the oil chamber 103. By installing the valve core 200 in the inner housing wall 111 and supporting and fixing the inner housing wall 111, the stability and reliability of the valve core 200 are achieved, ensuring the stability and reliability of the valve core 200 when working.

[0046] In some specific embodiments of the present invention, the inner shell wall 111 is configured with a guide hole 104 connected to the oil chamber 103 on the outer peripheral side of the elastic member 300 , and the oil chamber 103 flows into the inner shell wall 11 through the guide hole 104 to push the valve core 200 to move.

[0047] The guide hole 104 is located on the outer peripheral side of the elastic member 300, providing a flow channel for the oil. When the oil enters the inner shell wall 111 through the guide hole 103, the flow rate and pressure of the oil can be adjusted, and the movement of the valve core 200 can be promoted, thereby realizing further control over the opening and closing of the valve housing 100, and preventing the valve core 200 from not moving into place, resulting in the failure of the valve core channel 210 and the outlet 102 to communicate. The flow of oil will exert pressure on the valve core 200, so that the valve core 200 can move up and down in the valve housing 100, thereby realizing the self-locking function of the self-locking valve 1.

[0048] In some specific embodiments of the present invention, Figure 1 As shown, the valve core flow channel 210 includes a radial valve core flow channel 211 and an axial valve core flow channel 212. The radial valve core flow channel 211 penetrates the valve core 200 in the radial direction, and when the valve core 200 moves to the flow position, the radial valve core flow channel 211 is connected to the oil chamber 103. The two ends of the axial valve core flow channel 212 are respectively connected to the outlet and the radial valve core flow channel 211.

[0049] The radial valve core flow channel 211 penetrates the valve core 200 in the radial direction. When the valve core 200 moves to the flow position, the radial valve core flow channel 211 is connected to the oil chamber 103, so that the oil can flow radially inside the valve core 200, which helps to control the inflow and outflow and flow direction of the oil, adjust the pressure and flow of the oil, and realize the up and down movement of the valve core 200. When the lifting cylinder fails, the pressure on the upper part of the valve core 200 is less than the pressure on the lower part, and the valve core 200 moves downward. The oil will flow to the radial valve core channel 211 through the axial valve core channel 212, so that the valve core 200 can be better driven to move downward, and the outlet 102 of the valve housing 100 is blocked. The lifting cylinder is fixed in a fixed position, which improves the reliability of the structure.

[0050] In some specific embodiments of the present invention, Figure 1As shown, there are multiple axial valve core flow channels 212 and radial valve core flow channels 211, and the radial valve core flow channels 211 are connected to the axial valve core flow channels 212 on both radial sides of the valve core 200. By adopting multiple axial valve core flow channels 212 and radial valve core flow channels 211, the number of oil channels inside the valve core 200 can be increased, and the flow efficiency and speed of the oil inside the valve core 200 can be improved. The multi-channel design allows the oil to flow more smoothly inside the valve core, reducing the resistance and pressure loss of the oil, and improving the working efficiency of the self-locking valve 1. At the same time, the multi-channel structure makes the oil inside the valve core 200 more evenly distributed, reduces the instability and eddy current phenomenon when the oil flows, and improves the stability and control accuracy of the self-locking valve 1.

[0051] The lifting system 10 according to an embodiment of the present invention is described below.

[0052] like Figure 2 As shown, the lifting system 10 according to the embodiment of the utility model comprises a lifting cylinder 11, a self-locking valve 1 according to the above embodiment of the utility model and an oil pump 12. The lifting cylinder 11 is provided with an oil inlet. The self-locking valve 1 is connected to the oil inlet of the lifting cylinder 11. The self-locking valve 1 is connected to the oil pump 12 through the lifting cylinder.

[0053] When the lifting system 10 starts working, the oil pump 12 starts working, one end of the two ends of the self-locking valve 1 is connected to the oil pump, and the other end is connected to the lifting cylinder 11, and the oil is transported to the self-locking valve 1 through the lifting cylinder. The self-locking valve 1 is connected to the oil inlet of the lifting cylinder 11. When the lifting cylinder 11 needs to lift, the force of the elastic member 300 and the first valve housing 110 on the valve core 200 is greater than the force of the second valve housing 120 on the valve core 200, and the valve core 200 moves upward, and the pressure in the self-locking valve 1 is in a balanced state. When the lifting cylinder 11 is in a fixed position, due to a malfunction, the force exerted by the first valve housing 110 on the valve core 200 is almost zero. At this time, the force exerted by the elastic member 300 on the valve core 200 is smaller than the force exerted by the second valve housing 120. The valve core 200 loses balance and gradually moves to the lower end of the valve housing 100 to block the inlet 101. At this time, the lifting cylinder 11 is in a pressure-maintaining state and in a fixed position and will not continue to fall back.

[0054] According to the lifting system 10 of the above embodiment of the utility model, by utilizing the self-locking valve 1 according to the embodiment of the utility model, the safety of the structure is improved and the safety of the operators is protected.

[0055] A vehicle according to an embodiment of the present invention is described below.

[0056] The vehicle according to the embodiment of the present utility model comprises the lifting system 10 according to the above embodiment of the present utility model.

[0057] The vehicle according to the above-mentioned embodiment of the utility model has the advantages of improving the safety of the structure and protecting the safety of the operators by utilizing the lifting system according to the embodiment of the utility model.

[0058] Other structures and operations according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A self-locking valve, characterized in that: include: A valve housing, wherein the valve housing is configured with an inlet and an outlet, and an oil chamber is formed between the inlet and the outlet; A valve core, wherein the valve core is installed in the valve housing, the oil chamber surrounds the valve core, the valve core is movable between a self-locking position and a flow position, the valve core is constructed with a valve core flow channel, the valve core flow channel is connected to the outlet, the valve core flow channel is connected to the oil chamber when the valve core is in the flow position, and the valve core flow channel and the oil chamber are closed when the valve core is in the self-locking position.

2. The self-locking valve according to claim 1, characterized in that: Also includes: An elastic member is installed in the valve housing, and two ends of the elastic member are respectively stopped at the valve housing and the valve core to apply elastic force to the valve core.

3. The self-locking valve according to claim 2, characterized in that: A limiting column is configured at one end of the valve core facing the inlet, and the elastic member is sleeved on the limiting column.

4. The self-locking valve according to claim 2, characterized in that: The valve housing comprises: a first valve housing, the oil chamber being formed in the first valve housing, the valve core being installed in the first valve housing, and the inlet being formed in the first valve housing; The second valve housing is sealed at one end of the first valve housing and is threadedly connected to the first valve housing. The outlet is formed in the second valve housing.

5. The self-locking valve according to claim 4, characterized in that: The first valve housing is constructed with an inner housing wall and an outer housing wall, the oil chamber is formed between the inner housing wall and the outer housing wall, the valve core is installed in the inner housing wall, and the inner housing wall communicates the inlet and the oil chamber, and the outlet and the oil chamber.

6. The self-locking valve according to claim 5, characterized in that: The inner shell wall is configured with a guide hole connected to the oil chamber on the outer peripheral side of the elastic member, and the oil chamber flows into the inner shell wall through the guide hole to push the valve core to move.

7. The self-locking valve according to claim 1, characterized in that: The valve core flow channel comprises: A radial valve core flow channel, wherein the radial valve core flow channel penetrates the valve core in a radial direction, and when the valve core moves to the flow position, the radial valve core flow channel is communicated with the oil chamber; An axial valve core flow channel, two ends of which are respectively connected to the outlet and the radial valve core flow channel.

8. The self-locking valve according to claim 7, characterized in that: There are multiple axial valve core flow channels and multiple radial valve core flow channels, and the radial valve core flow channels are connected to the axial valve core flow channels on both radial sides of the valve core.

9. A lifting system, characterized in that: include: A lifting cylinder, wherein the lifting cylinder is provided with an oil inlet; The self-locking valve according to any one of claims 1 to 8, wherein the self-locking valve is connected to the oil inlet of the lifting cylinder; An oil pump, wherein the self-locking valve is connected to the oil pump through the lifting cylinder.

10. A vehicle, characterized in that: include: A lifting system according to claim 9.

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