Manual emergency valve group

Abstract

A manual emergency valve bank is provided with a valve block, an oil inlet, an oil outlet, a plurality of emergency oil ports and an oil port B1 are formed in the valve block, a shuttle valve is arranged in the valve block, a manual reversing valve is installed on the valve block, and the manual reversing valve is provided with an oil port P connected with the oil inlet, an oil port T connected with the oil outlet, an oil port A and an oil port B; an oil port A of the manual reversing valve is connected with an oil port P1 of the shuttle valve and a plurality of emergency oil ports, an oil port B of the manual reversing valve is connected with an oil port B1, an oil port P2 of the shuttle valve and a plurality of emergency oil ports, and an oil port A of the shuttle valve is connected with a plurality of emergency oil ports. Emergency operation can be carried out as long as an emergency hydraulic source exists. Compared with a parallel manual valve of a traditional manual scheme, the number of elements of an operation panel is smaller, and pipelines are simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valve groups, in particular to a manual emergency valve group. Background Art

[0002] The action of the hydraulic actuator of traditional automation equipment is controlled by the solenoid valve, and the control system controls the action of the solenoid valve to operate the hydraulic actuator. The hydraulic actuator can realize different functions according to the different driven objects, such as driving the valve to open / close or keep it in a certain position, driving the hydraulic clutch to engage / disengage, driving the hydraulic brake to brake / disengage, etc. As users' requirements for equipment reliability increase, it is required that the equipment can still be operated in an emergency after an abnormal power failure, and realize basic functions such as emergency closing / opening of valves, emergency shifting of automatic transmissions, or emergency braking of brakes.

[0003] The traditional emergency operation method is to use the emergency power supply to continue to power the electromagnetic reversing valve, manually operate the manual valve connected in parallel with each electromagnetic valve, etc.

[0004] The existing emergency operation methods have the following problems: first, the emergency power supply needs to be charged regularly, and there is still a risk of power failure. Second, the emergency power supply has a service life problem and needs to be replaced regularly, which is costly. Third, each solenoid valve is connected in parallel with a manual valve, which will increase the number of operating panel components and make the pipeline more complicated. Third, if multiple hydraulic actuators need to be shut down simultaneously, multiple operations are required, which is inconvenient.

[0005] Therefore, how to be more reliable, reduce costs, reduce operating panel components, simplify piping, and improve operational portability are technical issues that need to be solved urgently. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides a manual emergency valve group. Compared with the traditional emergency power supply technology, there is no risk of power failure. As long as there is an emergency hydraulic source (manual pump, accumulator, etc.), emergency operation can be performed. Compared with the parallel manual valve of the traditional manual solution, the operation panel has fewer components and the pipeline is simpler. Multiple hydraulic actuators can be controlled by one operation, the number of operations is reduced, and the portability of operation is improved. The integrated valve group structure is adopted to optimize the valve group volume and reduce the number of pipelines.

[0007] In order to achieve the above technical purpose, the technical solution adopted is: a manual emergency valve group, provided with a valve block, on which an oil inlet, an oil outlet, multiple emergency oil ports and a B1 oil port are provided, a shuttle valve is provided in the valve block, and a manual reversing valve is installed on the valve block, the manual reversing valve has a P oil port connected to the oil inlet, a T oil port connected to the oil outlet, an A oil port and a B oil port, the A oil port of the manual reversing valve is respectively connected to the P1 oil port of the shuttle valve and several emergency oil ports, the B oil port of the manual reversing valve is respectively connected to the B1 oil port, the P2 oil port of the shuttle valve and several emergency oil ports, and the A oil port of the shuttle valve is connected to several emergency oil ports.

[0008] Furthermore, a plurality of one-way valves are provided in the valve block, the A oil port and the B oil port of the manual reversing valve are connected to the oil inlets of several one-way valves, the A oil port of the shuttle valve is connected to the oil inlets of several one-way valves, the oil outlet of each one-way valve is connected to an emergency oil port, the oil inlet of the one-way valve connected to the A oil port of the manual reversing valve is located behind the P1 oil port of the shuttle valve, and the oil inlet of the one-way valve connected to the B oil port of the manual reversing valve is located behind the P2 oil port of the shuttle valve.

[0009] Furthermore, the manual reversing valve is detachably mounted on the valve block.

[0010] Furthermore, the manual reversing valve is a two-position manual reversing valve or a three-position manual reversing valve.

[0011] Furthermore, the shuttle valve is detachably mounted on the valve block.

[0012] Furthermore, the one-way valve is detachably mounted on the valve block.

[0013] The beneficial effects of the utility model are:

[0014] 1. High integration, small size, small footprint, easy to arrange in the system;

[0015] 2. Compared with the traditional control system emergency power supply solution, it has higher reliability;

[0016] 3. One operation can drive at least two hydraulic actuators at the same time, reducing the number of operations and facilitating operation;

[0017] 4. By increasing or decreasing the valve body configuration of the valve group, it can be applied to a variety of applications and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the hydraulic principle diagram of the utility model;

[0019] Figure 2 This is a hydraulic principle diagram of adding multiple one-way valves to the utility model;

[0020] Figure 3This is a hydraulic principle diagram of the utility model with three check valves added;

[0021] Figure 4 The default working position of the hydraulic principle diagram provided in Example 1;

[0022] Figure 5 The first working position of the hydraulic principle diagram provided in Example 1;

[0023] Figure 6 The default working position of the hydraulic principle diagram provided in Example 2;

[0024] Figure 7 The first working position of the hydraulic principle diagram provided in Example 2;

[0025] Figure 8 The second working position of the hydraulic principle diagram provided in Example 2;

[0026] In the figure: 1. valve block; 2. manual reversing valve; 3. shuttle valve; 4. first one-way valve; 5. second one-way valve; 6. third one-way valve. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] like Figure 1 As shown, a manual emergency valve group is provided with a valve block 1, on which an oil inlet P, an oil outlet T, a plurality of emergency oil ports A1, A2, A3 and B1 are provided, the emergency oil ports A1, A2, A3 are externally connected to logic valves of actuators, the logic valves can be OR gate shuttle valves or are composed of a plurality of one-way valves, a shuttle valve 3 is provided in the valve block 1, a manual reversing valve 2 is installed on the valve block, the manual reversing valve 2 has a P oil port connected to the oil inlet, a T oil port connected to the oil outlet, an A oil port and a B oil port, the A oil port of the manual reversing valve 2 is respectively connected to the P1 oil port of the shuttle valve and a plurality of emergency oil ports, Figure 1 The middle one is the emergency oil port A1, the B oil port of the manual reversing valve is connected to the B1 oil port, the P2 oil port of the shuttle valve and several emergency oil ports. Figure 1 The middle one is the emergency oil port A2. The A port of the shuttle valve is connected to several emergency oil ports. Figure 1 The middle one is the emergency oil port A3.

[0029] like Figure 2 As shown, a manual emergency valve group, in Figure 1On the basis of the conventional oil pump, a one-way valve is added to the emergency oil port in parallel. The valve block is provided with an oil inlet P, an oil outlet T, multiple emergency oil ports A1, A2, A3, A4, A5 and B1 oil ports. Multiple one-way valves and shuttle valves 3 are provided in the valve block 1. The position of the one-way valve can be adaptively set according to the position of each oil port. The oil outlet of each one-way valve is connected to an emergency oil port, and no logic valve is required to be connected externally. The number of one-way valves and emergency oil ports can be set according to the oil pressure and demand, and the minimum number is three. A manual reversing valve 2 is installed on the valve block. The manual reversing valve 2 has a P oil port connected to the oil inlet, a T oil port connected to the oil outlet, an A oil port and a B oil port. The A oil port of the manual reversing valve 2 is respectively connected to the P1 oil port of the shuttle valve and the oil inlets of several one-way valves, the B oil port of the manual reversing valve is respectively connected to the B1 oil port, the P2 oil port of the shuttle valve and the oil inlets of several one-way valves, and the A oil port of the shuttle valve is connected to the oil inlets of several one-way valves.

[0030] like Figure 3 As shown, taking three one-way valves and three emergency oil ports A1, A2, and A3 as an example, the oil inlet (P oil port) of the manual reversing valve 2 is connected to the oil inlet P of the valve block 1, and the oil return port (T oil port) of the manual reversing valve 2 is connected to the oil outlet T of the valve block 1. The working oil port A of the manual reversing valve 2 is simultaneously connected to the P1 oil port of the shuttle valve 3 and the oil inlet of the first one-way valve 4. The working oil port B of the manual reversing valve 2 is simultaneously connected to the B1 oil port of the valve block 1, the P2 oil port of the shuttle valve 3, and the oil inlet of the third one-way valve 6. The B1 oil port of the valve block 1 is located after the working oil port B of the manual reversing valve 2 and before the P2 oil port of the shuttle valve 3 and the oil inlet of the third one-way valve 6. The P1 oil port of the shuttle valve 3 is located between the working oil port A of the manual reversing valve 2 and the oil inlet of the first non-return valve 4, the P2 oil port of the shuttle valve 3 is located between the working oil port B of the manual reversing valve 2 and the oil inlet of the third non-return valve 6, and the A oil port of the shuttle valve 3 is connected to the oil inlet of the second non-return valve 5. The oil outlet of the first non-return valve 4 is connected to the A1 oil port of the valve block 1. The oil outlet of the second non-return valve 5 is connected to the A2 oil port of the valve block 1, and the oil outlet of the third non-return valve 6 is connected to the A3 oil port of the valve block 1. By changing the position of the manual reversing valve 2, it is possible to achieve simultaneous oil outlets of A1 and A2 or simultaneous oil outlets of A2 and A3. A set of valve groups can simultaneously control two hydraulic actuators each time they are switched, and can be used in a variety of embodiments, such as driving two hydraulic actuators to close / open in an emergency, emergency shifting of an automatic transmission, emergency braking of two brakes, etc.

[0031] Example 1

[0032] Figure 4 and Figure 5The hydraulic principle diagram of the two working positions of the hydraulic system for emergency driving double-acting hydraulic actuator after some configuration changes are made to the embodiment 1. In this embodiment, the manual reversing valve 2 is replaced with a two-position four-way reversing valve, and the four oil ports of the manual reversing valve 2 in the default working position "0" are not connected to each other. In this embodiment, the working oil port A3 is equipped with a plug, and this oil circuit is blocked. The default working position hydraulic principle diagram is shown in Figure 4 , the pressure oil reaches the oil inlet of 1#~4# solenoid valves and the oil inlet of the manual reversing valve 2 of the utility model at the same time. Under normal circumstances, the manual reversing valve 2 of the utility model does not work, and there is no pressure oil output from the oil ports A1, A2, and A3. The 1#~4# hydraulic actuators are controlled by the solenoid valves. During the operation of the hydraulic actuators, the first one-way valve 4 and the second one-way valve 5 of the utility model are blocked from reverse flow, preventing the hydraulic actuator from leaking oil through the shuttle valve 3 of the utility model. When the system is abnormally powered off, the 1#~4# solenoid valves are powered off and return to the center position, and can no longer control the operation of the 1#~4# hydraulic actuators. At this time, if the manual reversing valve 2 is switched to the "1" position, see the schematic diagram. Figure 5 , the P oil port of the manual reversing valve 2 is connected to the working oil port A, and the working oil port B is connected to the T oil port. The pressure oil from the system emergency hydraulic source is divided into two oils from the oil inlet P of the valve block 1 through the P oil port and the working oil port A of the manual reversing valve 2. One pressure oil passes through the first check valve 4 and the A1 oil port of the valve block 1 and enters the piston chamber of one of the hydraulic actuators to drive the hydraulic actuator to act in an emergency. The other pressure oil enters the shuttle valve 3, so that the steel ball inside the shuttle valve 3 blocks the P2 oil port, connects the P1 oil port and the A oil port, and the pressure oil passes through the P1 oil port and the A oil port of the shuttle valve 3, and enters the piston chamber of another hydraulic actuator from the A2 oil port of the valve block 1 to drive the other hydraulic actuator to act in an emergency. After the hydraulic oils in the return oil chambers of the two hydraulic actuators converge, they flow back to the oil tank from the B1 oil port of the valve block 1 through the working oil port B and the T oil port of the manual reversing valve 2. The objects driven by the hydraulic actuator of this embodiment can be valves, machine tools, lifting platforms, etc.

[0033] Example 2

[0034] Figure 6 , Figure 7 and Figure 8 The hydraulic principle diagram of the three working positions of the hydraulic system for emergency driving the single-acting hydraulic actuator after some configuration changes are made to the embodiment 1. In this embodiment, the first one-way valve 4, the second one-way valve 5 and the third one-way valve 6 are replaced with normally open plug-ins, and the B1 oil port of the valve block 1 is sealed with a plug. The default working position hydraulic principle diagram is shown in Figure 6, the pressure oil reaches the P oil port of 1#~4# solenoid valves and the manual reversing valve 2 of the utility model at the same time. Under normal circumstances, the manual reversing valve 2 of the utility model does not work, and there is no pressure oil output from the oil ports A1, A2, and A3, and the 1#~4# hydraulic actuators are controlled by the solenoid valve. The three hydraulic actuators connected to the oil ports A1, A2, and A3 are respectively connected to a logic valve to prevent the normal working pressure oil from smearing with other hydraulic actuators through the shuttle valve 3 of the utility model, and to prevent A1, A2, and A3 from outputting pressure oil and flowing directly back to the oil tank through the A port of the solenoid valve, and failing to build up pressure in the piston chamber of the hydraulic actuator. When the system is abnormally powered off, the 1#~4# solenoid valves are powered off and reset, and can no longer control the action of the 1#~4# hydraulic actuators. At this time, if the manual reversing valve 2 is switched to the "1" position, see the schematic diagram Figure 7 , the P oil port of the manual reversing valve 2 is connected to the working oil port B, the working oil port A is connected to the T oil port, and the pressure oil from the system emergency hydraulic source is divided into two oil paths after passing through the P oil port and the working oil port B of the manual reversing valve 2 from the oil inlet P of the valve block 1. One pressure oil path enters the P2 oil port of one of the hydraulic actuator logic valves through the A3 oil port of the valve block 1, so that the steel ball of the corresponding logic valve blocks the P1 oil port to prevent the pressure oil from flowing back to the oil tank through the solenoid valve corresponding to the hydraulic actuator, and then enters the piston chamber of the hydraulic actuator from the A oil port of the corresponding logic valve to drive the hydraulic actuator to take emergency action. Another line of pressure oil enters shuttle valve 3, causing the steel ball inside shuttle valve 3 to block the P1 oil port, connecting the P2 oil port and the A oil port. The pressure oil passes through the P2 oil port and the A oil port of shuttle valve 3, and enters the P2 oil port of the logic valve of another hydraulic actuator from the A2 oil port of valve block 1, causing the steel ball of the corresponding logic valve to block the P1 oil port, preventing the pressure oil from flowing back to the oil tank through the solenoid valve corresponding to the hydraulic actuator, and then enters the piston chamber of another hydraulic actuator from the A oil port of the corresponding logic valve, driving the emergency action of another hydraulic actuator. If the manual reversing valve 2 is switched to the "2" position, see the schematic diagram Figure 8, the P oil port of the manual reversing valve 2 is connected to the working oil port A, and the working oil port B is connected to the T oil port. The pressure oil from the system emergency hydraulic source is divided into two oil paths after passing through the P oil port of the valve block 1 through the P oil port and the working oil port A of the manual reversing valve 2. One pressure oil path enters the P2 oil port of one of the hydraulic actuator logic valves through the A1 oil port of the valve block 1, so that the steel ball of the corresponding logic valve blocks the P1 oil port to prevent the pressure oil from flowing back to the oil tank through the solenoid valve corresponding to the hydraulic actuator, and then enters the piston chamber of the hydraulic actuator through the A oil port of the corresponding logic valve to drive the hydraulic actuator to take emergency action. Another line of pressure oil enters shuttle valve 3, so that the steel ball inside shuttle valve 3 blocks the upper P2 oil port, connecting the P1 oil port and the A oil port. The pressure oil passes through the P1 oil port and the A oil port of shuttle valve 3, and enters the P2 oil port of the logic valve of another hydraulic actuator from the A2 oil port of valve block 1, so that the steel ball of the corresponding logic valve blocks the P1 oil port, preventing the pressure oil from flowing back to the oil tank through the solenoid valve corresponding to the hydraulic actuator, and then enters the piston chamber of another hydraulic actuator from the A oil port of the corresponding logic valve, driving the emergency action of another hydraulic actuator. The logic valve in the hydraulic actuator in this embodiment can be an OR gate shuttle valve, or it can be composed of two one-way valves in opposite directions. The object driven by the hydraulic actuator in this embodiment can be the hydraulic clutch of an automatic transmission to realize emergency manual shifting. Or it can be the hydraulic clutch, hydraulic brake, etc. of other equipment.

Claims

1. A manual emergency valve group, characterized in that: A valve block is provided, on which an oil inlet, an oil outlet, multiple emergency oil ports and a B1 oil port are provided, a shuttle valve is provided in the valve block, and a manual reversing valve is installed on the valve block, the manual reversing valve has a P oil port connected to the oil inlet, a T oil port connected to the oil outlet, an A oil port and a B oil port, the A oil port of the manual reversing valve is respectively connected to the P1 oil port of the shuttle valve and several emergency oil ports, the B oil port of the manual reversing valve is respectively connected to the B1 oil port, the P2 oil port of the shuttle valve and several emergency oil ports, and the A oil port of the shuttle valve is connected to several emergency oil ports.

2. A manual emergency valve assembly according to claim 1, characterized in that: The valve block is also provided with a plurality of one-way valves. The A oil port and the B oil port of the manual reversing valve are connected to the oil inlets of several one-way valves. The A oil port of the shuttle valve is connected to the oil inlets of several one-way valves. The oil outlet of each one-way valve is connected to an emergency oil port. The oil inlet of the one-way valve connected to the A oil port of the manual reversing valve is located behind the P1 oil port of the shuttle valve, and the oil inlet of the one-way valve connected to the B oil port of the manual reversing valve is located behind the P2 oil port of the shuttle valve.

3. A manual emergency valve assembly according to claim 1 or 2, characterized in that: The manual reversing valve is detachably mounted on the valve block.

4. A manual emergency valve assembly according to claim 1 or 2, characterized in that: The manual reversing valve is a two-position manual reversing valve or a three-position manual reversing valve.

5. A manual emergency valve assembly as claimed in claim 1 or 2, characterized in that: The shuttle valve is detachably mounted on the valve block.

6. A manual emergency valve assembly as claimed in claim 2, characterized in that: The one-way valve is detachably mounted on the valve block.

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