A hydraulic system with safety measures

Abstract

The present application discloses a hydraulic system with safety measures, including a fuel tank, a fuel cylinder, a drive circuit, an accumulator and an emergency circuit. The fuel cylinder controls the amusement equipment to descend and ascend respectively by extending and contracting; the rod chamber of the fuel cylinder is connected to the fuel tank through the drive circuit and the emergency circuit, and the accumulator is connected to the rodless chamber of the fuel cylinder; the drive circuit is suitable for driving the fuel cylinder to contract, the accumulator is suitable for driving the fuel cylinder to extend, and the emergency circuit is suitable for returning the oil in the rod chamber of the fuel cylinder to the fuel tank during the return stage of the amusement equipment or when the drive circuit fails; the accumulator is suitable for storing energy through the oil in the rodless chamber when the fuel cylinder contracts. Beneficial effects of the present application: Compared with the traditional method, the hydraulic system of the present application has a simple and stable structure; it can meet the requirements of high-precision and high-frequency response control performance. By setting up an emergency circuit, the stability of the amusement equipment in disembarking passengers when fully loaded can be guaranteed.

Description

Technical Field

[0001] The present application relates to the field of hydraulic technology, and in particular to a hydraulic system with safety measures. Background Art

[0002] For some amusement facilities in amusement parks, such as rotating towers and space shuttles, the hydraulic systems of tower-type amusement facilities often need to provide very high speeds, such as 6-8m / s, according to the required working conditions, and the hydraulic systems of the above-mentioned amusement facilities have a high action frequency. If the oil cylinder is directly used to achieve the above speed requirements, the processing technology of the oil cylinder needs to be particularly high. However, even if there is an oil cylinder with a higher processing technology, it often leaks frequently due to the harsh working environment of the amusement facilities; this will lead to the operation safety of the amusement facilities cannot be guaranteed. Summary of the invention

[0003] One of the objects of the present application is to provide a hydraulic system with safety measures that can solve at least one of the defects in the above-mentioned background technology.

[0004] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a hydraulic system with safety measures, including an oil tank, an oil cylinder, a drive circuit, an accumulator and an emergency circuit; the oil cylinder controls the amusement equipment to descend and rise respectively by extending and contracting; the rod chamber of the oil cylinder and the oil tank are connected through the drive circuit and the emergency circuit, and the accumulator is connected to the rodless chamber of the oil cylinder; the drive circuit is suitable for supplying oil to the rod chamber of the oil cylinder, the accumulator is suitable for supplying oil to the rodless chamber of the oil cylinder, and the emergency circuit is suitable for returning the oil in the rod chamber of the oil cylinder to the oil tank during the return stage of the amusement equipment or when the drive circuit fails; the accumulator is suitable for storing energy through the oil in the rodless chamber when the cylinder contracts.

[0005] Preferably, the emergency circuit comprises a speed regulating valve V8 and an electromagnetic ball valve V4 connected in series; the emergency circuit is suitable for controlling the extension speed of the oil cylinder by controlling the opening of the speed regulating valve V8.

[0006] Preferably, the hydraulic system further comprises an oil replenishing branch, wherein the oil replenishing branch is connected to the accumulator, and the oil replenishing branch is suitable for replenishing oil to a set amount according to the remaining oil amount in the accumulator.

[0007] Preferably, the oil replenishment branch includes a pressure sensor and an electromagnetic ball valve V11, the pressure sensor is connected to the accumulator, the input end of the electromagnetic ball valve V11 is connected to the drive circuit, and the output end of the electromagnetic ball valve V11 is connected to the accumulator; the pressure sensor is used to monitor the pressure of the accumulator in real time, and the electromagnetic ball valve V11 conducts the oil replenishment branch according to the monitoring result of the accumulator; wherein, when the accumulator is replenishing oil, the rod chamber of the oil cylinder is driven by the drive circuit to maintain pressure.

[0008] Preferably, the drive circuit includes an oil supply branch, a balancing branch, a pilot branch and a servo reversing valve V7; the pilot branch is used to perform pilot control on the servo reversing valve V7; the inlet of the servo reversing valve V7 is connected to the oil tank through the oil supply branch, and the oil return port of the servo reversing valve V7 is connected to the oil tank; one end of the balancing branch is connected to the rod chamber of the cylinder, and the other end is connected to the servo reversing valve V7; when the cylinder contracts, the servo reversing valve V7 is controlled by the pilot branch, and the oil supply branch is suitable for transporting the oil in the oil tank to the rod chamber of the cylinder through the balancing branch; when the cylinder extends, the servo reversing valve V7 is controlled by the pilot branch, and the balancing branch is suitable for directly returning the oil in the rod chamber of the cylinder from the oil return port of the servo reversing valve V7 to the oil tank.

[0009] Preferably, the oil supply branch includes a first oil pump, a relief valve V1, an electromagnetic ball valve V3 and a check valve V2; the input end of the first oil pump extends to the oil tank, the output end of the first oil pump is connected to the servo reversing valve V7 through the check valve V2, and the output end of the first oil pump is also connected to the oil tank through the relief valve V1 in parallel; one end of the electromagnetic ball valve V3 is connected between the check valve V2 and the servo reversing valve V7, and the other end is connected to the oil tank.

[0010] Preferably, the balancing branch includes a balancing valve V9 and a relief valve V12; the balancing valve V9 is connected to the servo reversing valve V7, and the relief valve V12 is connected in parallel between the rod chamber of the oil cylinder and the servo reversing valve V7.

[0011] Preferably, the pilot branch includes a second oil pump, an electromagnetic reversing valve V6 and a relief valve V13; the output end of the second oil pump is connected to the pilot end of the servo reversing valve V7 through the electromagnetic reversing valve V6, and the input end of the second oil pump extends into the oil tank; the output end of the second oil pump is also connected to the oil tank through the relief valve V13 in parallel.

[0012] Preferably, the balancing valve V9 adopts a pilot control structure; the pilot branch also includes an electromagnetic reversing valve V5, and the output end of the second oil pump is also connected to the pilot end of the balancing valve V9 through the electromagnetic reversing valve V5.

[0013] Preferably, the hydraulic system further comprises a damper, and the damper is arranged directly below the entertainment equipment.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] Compared with the traditional method, the hydraulic system of the present application has a simple and stable structure and can meet the requirements of high-precision and high-frequency response control performance. By setting up an emergency circuit, the smooth disembarkation of the entertainment equipment under full load can be guaranteed. The rodless chamber of the oil cylinder adopts an accumulator for closed oil supply, which can avoid the difficulty of self-priming caused by conventional direct oil suction from the oil tank; at the same time, the accumulator can adaptively replenish oil to compensate for the leakage of the oil cylinder, thereby ensuring the working safety of the oil cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application.

[0017] In the figure: oil tank 1, first oil pump 2, second oil pump 3, adapter 4, oil cylinder 100, entertainment equipment 200, damper 300, accumulator 400. DETAILED DESCRIPTION

[0018] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", 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 present application. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed 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. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0019] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0021] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] The terms "including" and "having" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0024] One of the preferred embodiments of the present application is as follows: Figure 1As shown, a hydraulic system with safety measures includes an oil tank 1, an oil cylinder 100, a drive circuit, an accumulator 400 and an emergency circuit. The oil cylinder 100 is generally installed vertically with the rod cavity facing upward, which can improve the working safety of the oil cylinder 100. The piston rod of the oil cylinder 100 can generally be connected to the entertainment device 200 through a labor-saving mechanism, and then the entertainment device 200 can be pulled up and down by a relatively small driving force. Specifically, the oil cylinder 100 can control the entertainment device 200 to descend and rise respectively by extending and retracting the piston rod.

[0025] The rod chamber of the oil cylinder 100 is connected to the oil tank 1 through a drive circuit and an emergency circuit, and the accumulator 400 is connected to the rodless chamber of the oil cylinder 100. The drive circuit can supply oil to the rod chamber of the oil cylinder 100 to drive the oil cylinder 100 to retract, and the accumulator 400 can supply oil to the rodless chamber of the oil cylinder 100 to drive the oil cylinder 100 to extend. The emergency circuit can return the oil in the rod chamber of the oil cylinder 100 to the oil tank 1 when the entertainment device 200 is in the return stage or the drive circuit fails; the accumulator 400 can store energy through the oil in the rodless chamber when the oil cylinder 100 is retracted.

[0026] It is understandable that there are many labor-saving mechanisms for connecting the piston rod of the oil cylinder 100 with the entertainment device 200, and the most common one is a pulley block. During the operation of the entertainment device 200, it includes a normal rising stage and a return stage; taking the common "space shuttle" entertainment facility as an example, its rising stage is a continuous rising and falling process, wherein the height of the rising process is greater than the height of the falling process, so that the overall height of the entertainment device 200 continues to rise until it reaches the highest position and then returns. The hydraulic system control of the traditional entertainment device 200 in the return stage adopts the same circuit as the descending process in the rising stage, that is, the drive circuit; due to the long duration of the return stage and the large impact, the hose used for oil supply in the hydraulic system may burst. Therefore, the present embodiment is provided with an emergency circuit, through which the control circuits of the rising stage and the return stage of the entertainment device 200 can be distinguished, so that when the entertainment device 200 is in the return stage, the oil in the rod chamber of the oil cylinder 100 flows back to the oil tank 1 through the emergency circuit, which can reduce the impact force on the drive circuit, thereby ensuring the safety of the entire hydraulic system. At the same time, when the drive circuit fails, the entertainment equipment 200 can also return oil through the emergency circuit to achieve the purpose of safe landing; while the entertainment equipment 200 adopts the traditional control method and will not be able to realize the oil return of the rod chamber of the cylinder 100 when the drive circuit fails, thereby causing the entertainment equipment 200 to be unable to land.

[0027] At the same time, in this embodiment, the rodless chamber of the oil cylinder 100 is supplied with oil by the accumulator 400 alone. Since the pressure requirement of the rodless chamber of the oil cylinder 100 is relatively small, the accumulator 400 can be a low-pressure accumulator. Compared with the traditional method of using the oil tank 1 to directly supply oil to the rodless chamber of the oil cylinder 100, on the one hand, the oil circuit structure of the hydraulic system can be simplified, and on the other hand, closed adaptive oil supply can be achieved; that is, the accumulator 400 can continuously supply oil to the rodless chamber of the oil cylinder 100. If the oil cylinder 100 leaks and the pressure of the rodless chamber drops, the accumulator 400 can automatically replenish the oil for the oil cylinder 100, so that the oil cylinder 100 can work stably, thereby ensuring the safe operation of the entertainment device 200.

[0028] In order to cope with the situation of extreme failure, that is, when the entertainment device 200 loses its limit and falls freely, a damper 300 can be installed directly below the entertainment device 200; so that after the entertainment device 200 contacts the damper 300, the damper 300 can convert kinetic energy into heat energy for consumption to achieve buffering of the entertainment device 200, thereby ensuring that the entertainment device 200 can return to the ground safely. There are many specific types of dampers 300, such as spring dampers and gas-liquid dampers, etc. Considering the large impact of the entertainment device 200, the damper 300 preferably adopts a gas-liquid damper.

[0029] In this embodiment, there are many specific structures of the emergency circuit that can realize the above functions. For the sake of easy understanding, one of the structures will be described in detail below. Figure 1 As shown, the emergency circuit includes a speed regulating valve V8 and an electromagnetic ball valve V4 connected in series; when the entertainment device 200 is returning, the emergency circuit can control the extension speed of the cylinder 100 by controlling the opening of the speed regulating valve V8.

[0030] It should be known that the return process of the entertainment device 200 is a process of speed change, that is, the initial return speed is fast, but after the set distance from the ground, the return speed of the entertainment device 200 needs to be reduced until the speed is exactly zero when the entertainment device 200 reaches the ground. The change in the return speed of the entertainment device 200 corresponds to the change in the unit flow rate of the oil return in the rod chamber of the oil cylinder 100.

[0031] The specific structure and working principle of the speed regulating valve V8 are well known to those skilled in the art, so they will not be elaborated in detail here. Generally speaking, the speed regulating valve V8 is a combination valve composed of a differential pressure reducing valve and a throttle valve connected in series. The throttle valve is used to adjust the flow rate, and the differential pressure reducing valve automatically compensates for the influence of load changes, so that the pressure difference before and after the throttle valve is a fixed value, thereby eliminating the influence of load changes on the flow rate. In the return stage of the entertainment device 200, the return speed of the entertainment device 200 is controlled by controlling the opening of the throttle valve first large and then small.

[0032] During the rising stage of the entertainment device 200, in order to ensure the safe operation of the entertainment device 200, it is necessary to ensure that the emergency circuit is in a completely cut-off state. At this time, the opening of the speed control valve V8 can be adjusted to zero. However, based on the working characteristics of the speed control valve V8, its cut-off performance under high pressure is not excellent. Therefore, the electromagnetic ball valve V4 is added to the emergency circuit in this embodiment. The specific structure and working principle of the electromagnetic ball valve V4 are well known to those skilled in the art, so they will not be elaborated in detail here. When the entertainment device 200 is in the rising stage, the electromagnetic ball valve V4 can cut off the emergency circuit to prevent the oil in the rod chamber of the oil cylinder 100 from flowing back from the emergency circuit; when the entertainment device 200 is in the return stage, the electromagnetic ball valve V4 can be connected to the emergency circuit under electromagnetic control, so that the oil in the rod chamber of the oil cylinder 100 flows back to the oil tank 1 along the emergency circuit.

[0033] In this embodiment, it can be seen from the above content that the accumulator 400 can absorb oil and store energy through the oil in the rodless chamber when the oil cylinder 100 contracts. However, considering the leakage compensation of the oil cylinder 100 by the accumulator 400, as the working time increases, the remaining oil in the accumulator 400 will gradually decrease, and when it reaches a certain limit, it may affect the working performance of the accumulator 400. Therefore, in this embodiment, the hydraulic system also includes an oil replenishment branch, which is connected to the accumulator 400, and the oil replenishment branch can replenish oil according to the remaining oil in the accumulator 400 until it reaches a set amount.

[0034] Specifically, there are many specific structures of the oil replenishment branch circuit that can achieve the above functions. For the sake of easy understanding, one of the structures will be used for detailed description below. Figure 1 As shown, the oil replenishment branch includes a pressure sensor and an electromagnetic ball valve V11. The pressure sensor is connected to the accumulator 400 for real-time monitoring of the pressure of the accumulator 400. The input end of the electromagnetic ball valve V11 is connected to the drive circuit, and the output end of the electromagnetic ball valve V11 is connected to the accumulator 400. When the pressure sensor detects that the working pressure of the accumulator 400 is lower than the set threshold, the monitoring result can be fed back to the electromagnetic ball valve V11. At this time, the electromagnetic ball valve V11 can conduct the oil replenishment branch according to the monitoring result of the accumulator 400, and then the drive circuit can transport the oil in the oil tank 1 to the accumulator 400 through the oil replenishment branch for oil replenishment.

[0035] It should be noted that since the accumulator 400 is directly connected to the rodless chamber of the oil cylinder 100, when the accumulator 400 is replenished with oil, part of the oil may flow to the rodless chamber of the oil cylinder 100 to cause the oil cylinder 100 to extend. Therefore, in order to ensure that the replenishment of the accumulator 400 does not affect the oil cylinder 100, when the accumulator 400 is replenished with oil, the rod chamber of the oil cylinder 100 can be pressurized under the drive of the drive circuit, that is, at this time, the pressure of the rod chamber and the rodless chamber of the oil cylinder 100 remain balanced and equal. It should be known that the driving circuit can be used to control the pressure of the rod chamber and the rodless chamber of the oil cylinder 100 to be balanced and equal, which will be described in detail in the subsequent content.

[0036] In order to further ensure the working safety of the oil filling branch, Figure 1 As shown, the oil replenishment branch also includes a relief valve V10, one end of which is connected to the outlet of the electromagnetic ball valve V11, and the other end is connected to the oil tank 1. When the accumulator 400 cannot be replenished with oil, the oil transported by the oil replenishment branch can flow back to the oil tank 1 along the relief valve V10.

[0037] In this embodiment, there are many specific structures of the driving circuit that can realize the above functions. For the sake of easy understanding, one of the structures will be used for detailed description below. Figure 1 As shown, the drive circuit includes an oil supply branch, a balancing branch, a pilot branch and a servo reversing valve V7. The pilot branch is used to perform pilot control on the servo reversing valve V7; the inlet of the servo reversing valve V7 is connected to the oil tank 1 through the oil supply branch, and the oil return port of the servo reversing valve V7 is connected to the oil tank 1; one end of the balancing branch is connected to the rod chamber of the oil cylinder 100, and the other end is connected to the servo reversing valve V7. When the oil cylinder 100 contracts, the oil supply branch can transport the oil in the oil tank 1 to the rod chamber of the oil cylinder 100 through the balancing branch through the control of the servo reversing valve V7 by the pilot branch; when the oil cylinder 100 extends, the balancing branch can directly return the oil in the rod chamber of the oil cylinder 100 from the oil return port of the servo reversing valve V7 to the oil tank 1 through the control of the servo reversing valve V7 by the pilot branch; when the oil cylinder 100 extends, the balancing branch can directly return the oil in the rod chamber of the oil cylinder 100 from the oil return port of the servo reversing valve V7 to the oil tank 1.

[0038] It is understandable that electromagnetic control can also be used for the servo reversing valve V7, but considering that the use environment of the entertainment device 200 is open air and its working environment is relatively harsh, the electromagnetic control method is more easily damaged than the hydraulic pilot control, so the servo reversing valve V7 of this embodiment adopts a pilot control structure. The servo reversing valve V7 can be connected to the oil supply branch through the adapter 4, so that the servo reversing valve V7 can be connected with enough interfaces. When the entertainment device 200 is in the rising stage, the rising speed of the entertainment device 200 is not constant, and different rising speeds correspond to different pressures. Therefore, in order to ensure the stable operation of the oil cylinder 100, this embodiment sets a balancing branch to balance the pressure change of the oil cylinder 100 during the rising stage of the entertainment device 200. At the same time, in the aforementioned content, during the oil replenishment stage of the accumulator 400, the balancing branch can also balance the pressure of the rod chamber and the rodless chamber of the oil cylinder 100. For the convenience of understanding, the following will describe the branch structures of the drive circuit in detail.

[0039] Specifically, Figure 1 As shown, the oil supply branch includes a first oil pump 2, a relief valve V1, an electromagnetic ball valve V3 and a check valve V2. The input end of the first oil pump 2 extends to the oil tank 1, and the output end of the first oil pump 2 is connected to the servo reversing valve V7 through the check valve V2. The output end of the first oil pump 2 is also connected to the oil tank 1 through the parallel relief valve V1; one end of the electromagnetic ball valve V3 is connected between the check valve V2 and the servo reversing valve V7, and the other end is connected to the oil tank 1.

[0040] When the entertainment device 200 is in the ascending stage, if the entertainment device 200 needs to move upward, that is, the oil cylinder 100 needs to shrink; the first oil pump 2 can allow the oil in the oil tank 1 to pass through the one-way valve V2, the servo reversing valve V7 and the balance valve V9 in sequence and enter the rod chamber of the oil cylinder 100, at which time the electromagnetic ball valve V3 is in the cut-off state. If the entertainment device 200 needs to move downward, that is, the oil cylinder 100 needs to extend; the accumulator 400 can supply oil to the rodless chamber of the oil cylinder 100, at which time the electromagnetic ball valve V3 is in the conducting state, and then the oil in the rod chamber of the oil cylinder 100 passes through the balance valve V9, the servo reversing valve V7 and the electromagnetic ball valve V3 in sequence and flows back to the oil tank 1.

[0041] It should be noted that the specific structures and working principles of the overflow valve V1 and the electromagnetic ball valve V3 are well known to those skilled in the art, so they will not be elaborated in detail here. The overflow valve V1 mainly returns the oil delivered by the first oil pump 2 to the oil tank 1 when the drive circuit fails.

[0042] Specifically, Figure 1As shown, the balancing branch includes a balancing valve V9 and a relief valve V12; the balancing valve V9 is connected between the servo reversing valve V7 and the rod chamber of the oil cylinder 100, and the relief valve V12 is connected in parallel to the rod chamber of the oil cylinder 100. When the entertainment device 200 is in the ascending stage, if the entertainment device 200 needs to move upward, the balancing valve V9 can be opened so that the oil passing through the servo reversing valve V7 can flow from the balancing valve V9 to the rod chamber of the oil cylinder 100. If the entertainment device 200 needs to move downward, the balancing valve V9 can be adjusted so that the oil in the rod chamber of the oil cylinder 100 flows back from the balancing valve V9 to the servo reversing valve V7.

[0043] It should be noted that the specific structure and working principle of the balancing valve V9 and the relief valve V12 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here. The function of the relief valve V12 is to return the oil delivered by the balancing valve V9 or the oil in the rod chamber of the oil cylinder 100 directly to the oil tank 1 when a balancing branch fails.

[0044] Specifically, Figure 1 As shown, the pilot branch includes the second oil pump 3, the electromagnetic reversing valve V6 and the relief valve V13. The output end of the second oil pump 3 is connected to the pilot end of the servo reversing valve V7 through the electromagnetic reversing valve V6, and the input end of the second oil pump 3 extends into the oil tank 1; the output end of the second oil pump 3 is also connected to the oil tank 1 through the parallel relief valve V13. When the servo reversing valve V7 needs to be actuated, the electromagnetic reversing valve V6 will be turned on, and then the second oil pump 3 will deliver oil to the pilot end of the servo reversing valve V7 to control the servo reversing valve V7 to switch.

[0045] It should be noted that the specific structure and working principle of the electromagnetic reversing valve V6 and the relief valve V13 are well known to those skilled in the art, so they will not be elaborated in detail here. The function of the relief valve V13 is to return the oil delivered by the second oil pump 3 directly to the oil tank 1 when a failure occurs in the pilot branch.

[0046] It can be understood that the working environment of the balancing valve V9 is basically the same as that of the servo reversing valve V7, so the balancing valve V9 also preferably adopts a pilot control structure. Figure 1 As shown, the pilot branch also includes an electromagnetic reversing valve V5, and the output end of the second oil pump 3 is also connected to the pilot end of the balancing valve V9 through the electromagnetic reversing valve V5. When the balancing valve V9 needs to be actuated, the electromagnetic reversing valve V5 is turned on, and then the second oil pump 3 delivers oil to the pilot end of the balancing valve V9 to control the balancing valve V9 to change position. The specific structure and working principle of the electromagnetic reversing valve V5 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here.

[0047] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A hydraulic system with safety measures, characterized in that: It includes an oil tank, an oil cylinder, a drive circuit, an accumulator and an emergency circuit; the oil cylinder controls the amusement equipment to descend and ascend respectively by extending and contracting; the rod chamber of the oil cylinder is connected to the oil tank through the drive circuit and the emergency circuit, and the accumulator is connected to the rodless chamber of the oil cylinder; The drive circuit is suitable for driving the oil cylinder to retract, the accumulator is suitable for driving the oil cylinder to extend, the emergency circuit is suitable for returning the oil in the rod chamber of the oil cylinder to the oil tank during the return stage of the entertainment equipment or when the drive circuit fails; the accumulator is suitable for storing energy through the oil in the rodless chamber when the oil cylinder retracts; The hydraulic system further comprises an oil replenishment branch, the oil replenishment branch is connected to the accumulator, and the oil replenishment branch is suitable for replenishing oil according to the remaining oil volume of the accumulator until reaching a set volume; The oil replenishment branch includes a pressure sensor and an electromagnetic ball valve V11; the pressure sensor is connected to the accumulator, the input end of the electromagnetic ball valve V11 is connected to the drive circuit, and the output end of the electromagnetic ball valve V11 is connected to the accumulator; The pressure sensor is used to monitor the pressure of the accumulator in real time, and the electromagnetic ball valve V11 conducts the oil replenishment branch according to the monitoring result of the accumulator; Wherein, when the accumulator is replenishing oil, the rod chamber of the oil cylinder is driven by the driving circuit to maintain pressure.

2. The hydraulic system with safety measures according to claim 1, characterized in that: The emergency circuit includes a speed regulating valve V8 and an electromagnetic ball valve V4 connected in series; The emergency circuit is suitable for controlling the extension speed of the oil cylinder by controlling the opening of the speed regulating valve V8.

3. The hydraulic system with safety measures according to claim 1 or 2, characterized in that: The driving circuit includes an oil supply branch, a balancing branch, a pilot branch and a servo reversing valve V7; the pilot branch is used to perform pilot control on the servo reversing valve V7; the inlet of the servo reversing valve V7 is connected to the oil tank through the oil supply branch, and the oil return port of the servo reversing valve V7 is connected to the oil tank; one end of the balancing branch is connected to the rod chamber of the oil cylinder, and the other end is connected to the servo reversing valve V7; When the oil cylinder contracts, the pilot branch controls the servo reversing valve V7, and the oil supply branch is suitable for delivering the oil in the oil tank to the rod chamber of the oil cylinder through the balance branch; When the oil cylinder is extended, the servo reversing valve V7 is controlled by the pilot branch, and the balancing branch is suitable for returning the oil in the rod chamber of the oil cylinder directly to the oil tank from the oil return port of the servo reversing valve V7.

4. The hydraulic system with safety measures according to claim 3, characterized in that: The oil supply branch includes a first oil pump, a relief valve V1, an electromagnetic ball valve V3 and a one-way valve V2; the input end of the first oil pump extends to the oil tank, the output end of the first oil pump is connected to the servo reversing valve V7 through the one-way valve V2, and the output end of the first oil pump is also connected to the oil tank through the parallel relief valve V1; one end of the electromagnetic ball valve V3 is connected between the one-way valve V2 and the servo reversing valve V7, and the other end is connected to the oil tank.

5. The hydraulic system with safety measures according to claim 3, characterized in that: The balancing branch includes a balancing valve V9 and a relief valve V12; the balancing valve V9 is connected to the servo reversing valve V7, and the relief valve V12 is connected in parallel between the rod chamber of the oil cylinder and the servo reversing valve V7.

6. The hydraulic system with safety measures according to claim 5, characterized in that: The pilot branch includes a second oil pump, an electromagnetic reversing valve V6 and a relief valve V13; the output end of the second oil pump is connected to the pilot end of the servo reversing valve V7 through the electromagnetic reversing valve V6, and the input end of the second oil pump extends into the oil tank; the output end of the second oil pump is also connected to the oil tank through the parallel relief valve V13.

7. The hydraulic system with safety measures according to claim 6, characterized in that: The balancing valve V9 adopts a pilot control structure; the pilot branch also includes an electromagnetic reversing valve V5, and the output end of the second oil pump is also connected to the pilot end of the balancing valve V9 through the electromagnetic reversing valve V5.

8. The hydraulic system with safety measures according to claim 1, characterized in that: The hydraulic system further comprises a damper, which is arranged directly below the entertainment device.

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