CN210769613U

CN210769613U - Control valve for emergency rescue vehicle

Info

Publication number: CN210769613U
Application number: CN201921656923.7U
Authority: CN
Inventors: 姜洪; 王震山; 王清送; 张夕航; 史浙安; 陈钊汶; 王哲亮; 林俊策; 柯稳
Original assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Current assignee: Shanghai Shengbang Hydraulic Co ltd; Xuzhou Shengbang Machinery Co Ltd; Zhejiang Sunbun Technology Co Ltd; Sunbun Group Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-16
Anticipated expiration: 2029-09-30

Abstract

A control valve for an emergency rescue vehicle. The problem of current rescue car owner valve control troublesome, the function is single is solved. It is united, first work is united, second work is united including advancing oil return, feedback control, advance the oil return and be equipped with main oil inlet, oil return opening and flow divider valve on the antithetical couplet, the main oil inlet be linked together through relief pressure valve and work control valve, main oil inlet link to each other with pressure compensator, first work hydraulic fluid port respectively through first work switching-over valve, the oil-out of pressure compensator links to each other and controls the opening size of flow divider valve with the pressure oil interact of main oil inlet through the spring chamber of feedback oil circuit with the flow divider valve, first switching-over valve have make the main oil inlet pass through the second work switching-over valve with the first position of second work hydraulic fluid port switch on and the second position of disconnection. The utility model discloses simple structure still has, processing is convenient, long service life, leads to oily ability reinforce, loss of pressure advantage such as little.

Description

Control valve for emergency rescue vehicle

Technical Field

The utility model relates to a rescue car hydraulic control system speedily carries out rescue work, concretely relates to rescue car is with control valve speedily carries out rescue work.

Background

Various fire rescue equipment, special protection equipment for firemen, a fire breaking tool and a fire source detector are arranged on the emergency rescue vehicle, and the emergency rescue vehicle is a special service fire vehicle which is responsible for emergency rescue tasks. The emergency rescue vehicle structurally comprises a vehicle chassis, an upper loading compartment body (in which emergency rescue equipment is loaded), a power takeoff and transmission device, a generator (shaft belt type or independent generator set), a winch (hydraulic or electric), a vehicle-mounted crane (generally of a folding arm type and behind a vehicle body), a lifting lighting system and an electrical system. According to different purposes of emergency rescue fire-fighting vehicles, the specific configuration of the vehicle is different, and the vehicle is not always provided with all emergency rescue vehicles such as a truck-mounted crane, a winch, a generator, a lifting lamp and the like. The emergency rescue fire truck is also named as an emergency rescue vehicle, a rescue fire truck, a special emergency rescue vehicle and the like. The emergency rescue fire truck has the functions of hoisting, self-rescue/traction, obstacle removal, power generation, illumination and the like, and can be provided with a large number of various fire-fighting equipment or tools such as breaking, detection, leakage stoppage, protection and the like; the emergency rescue fire truck is widely applied to various fields of fire fighting troops, dealing with various natural disasters, emergencies, rescue and the like. The main valve that has set up rescue car of speedily carrying out rescue work is formula structure as an organic whole usually, and the runner structure in the main valve is complicated, and the casting is difficult, realizes the switching-over inefficiency through manually operation switching-over valve usually during current main valve control moreover, and control is troublesome, and the during operation need control pressure height, causes the product energy consumption height, and spare part damages easily, and product life is short. The difference between the pressure and the flow of the existing hydraulic control system is not large when the existing hydraulic control system acts as a variable pair, a telescopic mechanism, a winch mechanism and the like, so that the valve body machined in a sheet mode is similar in structure, the connection mode of the valve body is also directly connected with a high-pressure oil port of the system for oil transportation, but in the composite action, the valve body directly adopting the same type or the integral type can obviously not meet the system requirements in some systems needing specific flow (less flow) working conditions.

SUMMERY OF THE UTILITY MODEL

For solving the current rescue car owner valve control trouble of speedily carrying out rescue work among the background art, the problem of function singleness, the utility model provides a rescue car is with control valve speedily carrying out rescue work.

The technical scheme of the utility model is that: the utility model provides a rescue car control valve that speedily carries out rescue work, includes the valve body, the valve body including advance back oil antithetical couplet, feedback control antithetical couplet, at least one first work antithetical couplet and at least one second work antithetical couplet, advance back oil antithetical couplet on be equipped with main oil inlet, oil return opening and flow divider, all be equipped with first work hydraulic fluid port, first work switching-over valve, pressure compensator and work control valve in each first work antithetical couplet, feedback control antithetical couplet on be equipped with relief pressure valve, first certain flow valve, first switching-over valve and second switching-over valve, all be equipped with second work hydraulic fluid port, second work switching-over valve in each second work antithetical couplet, main oil inlet be linked together through relief pressure valve and work control valve and make first work switching-over valve switching-over through work control valve, main oil inlet link to each other with pressure compensator, first work respectively through first work switching-over valve, pressure compensator's oil outlet links to each other The opening size of the flow divider valve is controlled by the interaction of force and oil, the second reversing valve is provided with a first position and a second position, the first position receives pressure oil at the oil outlet of the first reversing valve and is connected with a spring cavity of the flow divider valve through a feedback oil path, and the first reversing valve is provided with a first position and a second position, the first position enables the main oil inlet to be communicated with the second working oil port through the second working reversing valve, and the second position enables the main oil inlet to be disconnected.

As an improvement of the utility model, the flow divider valve locate between main oil inlet and the oil return opening, the pressure oil of feedback oil circuit be linked together and with the main oil inlet pressure oil interact control flow divider valve's that gets into flow divider valve control chamber opening size with the spring chamber of flow divider valve.

As a further improvement of the present invention, the oil outlet of each pressure compensator is communicated with the feedback oil path through the check valve and communicated with the spring cavity of the pressure compensator connected with the first working unit through the feedback oil path.

As a further improvement, feedback control ally oneself with and be equipped with the feedback overflow valve, the parallelly connected setting of feedback overflow valve and first constant flow valve, pressure compensator's oil-out passes through the feedback oil circuit and links to each other with first constant flow valve, the oil-out of feedback overflow valve all are linked together with the oil return opening.

As a further improvement, the feedback control unite and be equipped with the second constant flow valve, the pressure oil of first switching-over valve oil-out is linked together through second constant flow valve and oil return opening.

As a further improvement, the oil inlet and return linkage is provided with an electric proportional overflow valve, and the feedback oil circuit is communicated with the oil return port through the electric proportional overflow valve.

As a further improvement, each first work is linked to all set up two work control valves, two the work control valve be a set of and accept the pressure oil of relief pressure valve oil-out respectively and export the first work switching-over valve switching-over of first work switching-over valve control.

As a further improvement of the utility model, the first reversing valve is communicated with the second work reversing valve on the second work union through the throttling hole.

As a further improvement of the utility model, the second work switching-over valve and the second work hydraulic fluid port between be equipped with two-way lock.

As a further improvement, the valve body include the tail antithetical couplet, feedback control antithetical couplet locate between first work antithetical couplet and the second work antithetical couplet, advance the oil return antithetical couplet and locate the outside of first work antithetical couplet, the tail antithetical couplet locate the outside of second work antithetical couplet, the tail antithetical couplet on be equipped with work hydraulic fluid port overflow valve, work hydraulic fluid port overflow valve locate between second work hydraulic fluid port and the oil return port.

The beneficial effects of the utility model are that, the utility model discloses a switching-over of the first work switching-over valve of work control valve control, control convenient and reliable controls, and the pressure oil after reducing pressure valve decompression controls moreover, and is strikeed for spare part for product long service life, the utility model discloses a first switching-over valve and second switching-over valve carry out the fuel feeding to second work switching-over valve to satisfy different actuating mechanism's requirement, make system adaptation scope wider. The utility model discloses simple structure still has, processing is convenient, long service life, leads to oily ability reinforce, loss of pressure advantage such as little.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional structure diagram of the first working unit 4 in fig. 1.

Fig. 3 is a schematic cross-sectional structure diagram of the second working connection 5 in fig. 1.

Fig. 4 is a hydraulic schematic diagram of an embodiment of the present invention.

In the figure, 1, a valve body; 2. An oil inlet and return link; 21. a flow divider valve; 22. an electric proportional relief valve; 3. a feedback control unit; 31. a pressure reducing valve; 32. a first constant flow valve; 33. a first direction changing valve; 34. a second directional control valve; 35. a feedback overflow valve; 36. a second constant flow valve; 37. an orifice; 38. a choke; 4. a first working unit; 41. a first working oil port; 42. a first working direction valve; 43. a pressure compensator; 44. a working control valve; 45. a one-way valve; 46. a safety overflow valve; 5. a second working unit; 51. a second working oil port; 52. a second working direction-changing valve; 53. a bidirectional lock; 6. tail connection; 61. an overflow valve of a working oil port; p, a main oil inlet; t, an oil return port; LS and a feedback oil path.

Detailed Description

The embodiments of the present invention will be further explained with reference to the accompanying drawings:

as shown in fig. 1 and fig. 2-4, a control valve for an emergency rescue vehicle comprises a valve body 1, wherein the valve body 1 comprises an oil inlet and return link 2, a feedback control link 3, at least one first working link 4 and at least one second working link 5, the oil inlet and return link 2 is provided with a main oil inlet P, an oil return port T and a diverter valve 21, each first working link 4 is provided with a first working oil port 41, a first working reversing valve 42, a pressure compensator 43 and a working control valve 44, the feedback control link 3 is provided with a pressure reducing valve 31, a first constant flow valve 32, a first reversing valve 33 and a second reversing valve 34, each second working link 5 is provided with a second working oil port 51 and a second working reversing valve 52, the main oil inlet P is communicated with the working control valve 44 through the pressure reducing valve 31 and the first working reversing valve 42 is reversed through the working control valve 44, the main oil inlet P is respectively connected with a pressure compensator 43 and a first working oil port 41 through a first working reversing valve 42, the oil outlet of the pressure compensator 43 is connected with the spring cavity of the flow divider valve 21 through a feedback oil path LS and is interacted with the pressure oil of the main oil inlet P to control the opening size of the flow divider valve 21, the second reversing valve 34 is provided with a first position and a second disconnected position, the first position and the second disconnected position are used for receiving the pressure oil at the oil outlet of the first reversing valve 33 and are connected with the spring cavity of the flow divider valve 21 through the feedback oil path LS, and the first reversing valve 33 is provided with a first position and a second disconnected position, the first position and the second disconnected position are used for enabling the main oil inlet P to be communicated with the second working oil port 51 through a second working reversing valve 52. The beneficial effects of the utility model are that, the utility model discloses a switching-over of the first work switching-over valve of work control valve control, control convenient and reliable controls, and the pressure oil after reducing pressure valve decompression controls moreover, and is strikeed for spare part for product long service life, the utility model discloses a first switching-over valve and second switching-over valve carry out the fuel feeding to second work switching-over valve to satisfy different actuating mechanism's requirement, make system adaptation scope wider. The utility model discloses simple structure still has, processing is convenient, long service life, leads to oily ability reinforce, loss of pressure advantage such as little. The utility model discloses a valve body, sealing member and other spare parts of low temperature resistant material for the product can work in the operational environment of-40 degrees. The utility model discloses a mode control first work switching-over valve switching-over of low pressure liquid accuse for the product switching-over is simple reliable, and control end pressure is little, is difficult to harm the valve inner part, makes product sealing performance good, long service life. The second working reversing valve can be an electromagnetic direct-drive reversing valve, and can be manually controlled to reverse, and more specifically, the second working reversing valve is a three-position four-way reversing valve. Specific theory, first work switching-over valve and second work switching-over valve are because the flow, the pressure requirement of facing executor and needs are all different, the utility model discloses a different drive system and control mode make the utility model discloses the adaptation scope is wide.

The flow divider 21 is arranged between the main oil inlet P and the oil return port T, and the pressure oil of the feedback oil path LS is communicated with the spring cavity of the flow divider 21 and interacts with the pressure oil entering the main oil inlet of the control cavity of the flow divider 21 to control the opening size of the flow divider 21. The structure can shunt according to the system requirement, and reduces the energy consumption. Specifically, when the first working oil port works, pressure oil passing through the pressure compensator enters the spring cavity of the diverter valve and interacts with pressure oil in the main oil inlet to control the opening size of the diverter valve 21, so that pressure oil in the output system is controlled. At this time, if the second working oil port needs to work, the first reversing valve and the corresponding second working reversing valve need to be reversed, and at this time, the pressure oil of the main oil inlet can flow through the first reversing valve, the throttling hole and the corresponding second working reversing valve to the second working oil port, so that the actuator acts. When the first working oil port does not act, namely, when pressure oil does not exist in the feedback oil path, if the second working oil port needs to work, the first reversing valve, the second reversing valve and the corresponding second working reversing valve need to be reversed, namely, after the first reversing valve and the second reversing valve are reversed, the pressure oil of the main oil inlet flows to the feedback oil path through the first reversing valve and the second reversing valve so as to control the opening of the flow divider valve to establish the pressure of the system, and at the moment, the pressure oil of the main oil inlet can flow to the second working oil port through the first reversing valve, the throttling hole and the corresponding second working reversing valve, so that the actuator acts. More specifically, the first reversing valve and the second reversing valve are both electromagnetic reversing valves, more specifically, the first reversing valve and the second reversing valve are both two-position two-way reversing valves, and more specifically, the normal states of the first reversing valve and the second reversing valve are both cut-off states.

The oil outlet of each pressure compensator 43 is communicated with a feedback oil path LS through a one-way valve 45 and is communicated with the spring cavity of the pressure compensator 43 of the first working unit through the feedback oil path LS. The structure ensures that the oil outlets of the pressure compensators can reliably enter the feedback oil path, and the opening size of each pressure compensator is adjusted through the feedback oil path, so that different work associations can coordinate to act, and the action is reliable. Specifically, the feedback oil path is provided with a throttling port 38. The arrangement of the throttling port enables the pressure in the system to be more stable and the product impact to be small.

The feedback control union 3 is provided with a feedback overflow valve 35, the feedback overflow valve 35 is connected with the first constant flow valve 32 in parallel, the oil outlet of the pressure compensator 43 is connected with the first constant flow valve 32 through a feedback oil path LS, and the oil outlet of the first constant flow valve 32 and the oil outlet of the feedback overflow valve 35 are both communicated with an oil return port T. The pressure in the feedback oil path is ensured to be low due to the arrangement of the feedback overflow valve, and the safety performance is high. Specifically, an electric proportional overflow valve 22 is arranged on the oil inlet and return union 2, and the feedback oil path LS is communicated with the oil return port T through the electric proportional overflow valve 22. The electric proportional overflow valve can set the opening pressure thereof more, so that a client can more need to adjust the safety pressure in the system, and the safety performance of the product is higher. The utility model discloses set up feedback overflow valve and some proportion overflow valve, be the setting of high-low pressure usually, the pressure of opening of an overflow valve is higher than another promptly for product property can stabilize like this, and is safer. The structure ensures that the product can still reliably run when one overflow valve fails, and the safety performance is higher.

Each first working link is provided with a safety overflow valve 46 which is arranged between the working oil port and the oil return port. The pressure of the first working oil port is more stable and safer due to the arrangement of the safety overflow valve, so that the pressure of the working oil port can overflow when exceeding the set value of the safety overflow valve, a high-pressure damage system and parts are avoided, and the safety performance is higher.

And a second constant flow valve 36 is arranged on the feedback control unit 3, and pressure oil at an oil outlet of the first reversing valve 33 is communicated with an oil return port T through the second constant flow valve. The structure ensures that the system can reliably drain oil in the pipeline when not in work, and has high safety performance.

Each first working unit 4 is provided with two working control valves 44, and the two working control valves 44 are a group and respectively receive pressure oil from the oil outlet of the pressure reducing valve 31 and output the pressure oil to the first working reversing valve 42 to control the reversing of the first working reversing valve 42. The structure enables the product to be controlled more conveniently and reliably, the pressure oil after being decompressed by the decompression valve is small in pressure, the product acts reliably and quickly, and parts in the valve body are not easy to lose. Specifically, the working control valve is an electric proportional pressure reducing valve, and the first working reversing valve is a three-position eight-way reversing valve. The first working reversing valve is a hydraulic control reversing valve, and the working reversing valve is a hydraulic control reversing valve with a manual control function. The electric proportional pressure reducing valve can accurately supply oil to the first working reversing valve according to the current, and a valve rod of the first working reversing valve is opened, so that oil feeding of a product is accurately controlled.

The first switching valve 33 is connected via an orifice 37 to a second service switching valve 52 of the second service connection 5. The arrangement of the throttling hole can reduce the pressure oil quantity entering the second working oil port, and meanwhile, the impact of the system is balanced, so that the second working oil port can obtain proper flow, and the actuator can reliably act.

A bidirectional lock 53 is arranged between the second working reversing valve 52 and the second working oil port 51. The two-way lock enables the safety performance of the actuator to be higher.

Valve body 1 include the tail and ally oneself with 6, feedback control ally oneself with 3 locate between first work antithetical couplet 4 and the second work antithetical couplet 5, advance back oil antithetical couplet 2 and locate the outside of first work antithetical couplet 4, tail antithetical couplet 6 locate the outside of second work antithetical couplet 5, tail ally oneself with 6 on be equipped with work hydraulic fluid port overflow valve 61, work hydraulic fluid port overflow valve 61 locate between second work hydraulic fluid port 51 and the oil return port T. The structure enables the product to be convenient to process and convenient to splice and assemble. More specifically say, in order to make product simple structure, processing is convenient, the utility model provides a feedback control allies oneself with and adopts two slice formula structure concatenations to form.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but 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 thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The skilled person should understand that: although the present invention has been described in accordance with the above embodiments, the inventive concept is not limited to this embodiment, and any modification of the inventive concept will be included in the scope of the patent claims.

Claims

1. The control valve for the emergency rescue vehicle comprises a valve body (1) and is characterized in that the valve body (1) comprises an oil inlet and return connection (2), a feedback control connection (3), at least one first working connection (4) and at least one second working connection (5), wherein a main oil inlet (P), an oil return port (T) and a flow dividing valve (21) are arranged on the oil inlet and return connection (2), a first working oil port (41), a first working reversing valve (42), a pressure compensator (43) and a working control valve (44) are arranged on each first working connection (4), a pressure reducing valve (31), a first constant flow valve (32), a first reversing valve (33) and a second reversing valve (34) are arranged on the feedback control connection (3), a second working reversing valve (51) and a second working reversing valve (52) are arranged on each second working connection (5), and the main oil inlet (P) is communicated with the working control valve (44) through the pressure reducing valve (31) and communicated with the working control valve (44) through the working oil port (52) The first working reversing valve (42) is reversed by the control valve (44), the main oil inlet (P) is respectively connected with the pressure compensator (43) and the first working oil port (41) through the first working reversing valve (42), the oil outlet of the pressure compensator (43) is connected with the spring cavity of the flow dividing valve (21) through a feedback oil path (LS) and is interacted with the pressure oil of the main oil inlet (P) to control the opening size of the flow dividing valve (21), the second reversing valve (34) is provided with a first position and a second disconnected position, the first position receives pressure oil at the oil outlet of the first reversing valve (33) and is connected with the spring cavity of the flow dividing valve (21) through a feedback oil path (LS), the first reversing valve (33) is provided with a first position and a second position, wherein the first position enables the main oil inlet (P) to be communicated with the second working oil port (51) through the second working reversing valve (52) and the second position is disconnected.

2. The control valve for the emergency rescue vehicle according to claim 1, wherein the flow divider valve (21) is arranged between the main oil inlet (P) and the oil return port (T), and the pressure oil of the feedback oil path (LS) is communicated with the spring cavity of the flow divider valve (21) and interacts with the pressure oil of the main oil inlet entering the control cavity of the flow divider valve (21) to control the opening size of the flow divider valve (21).

3. A control valve for an emergency rescue vehicle according to claim 1, characterized in that the oil outlet of each pressure compensator (43) is communicated with the feedback oil path (LS) through a one-way valve (45) and is communicated with the spring chamber of the pressure compensator (43) of the first working unit through the feedback oil path (LS).

4. The control valve for the emergency rescue vehicle according to claim 1, wherein a feedback overflow valve (35) is arranged on the feedback control unit (3), the feedback overflow valve (35) is connected in parallel with the first constant flow valve (32), an oil outlet of the pressure compensator (43) is connected with the first constant flow valve (32) through a feedback oil path (LS), and both the oil outlet of the first constant flow valve (32) and the oil outlet of the feedback overflow valve (35) are communicated with an oil return port (T).

5. The control valve for the emergency rescue vehicle according to claim 1, characterized in that the feedback control unit (3) is provided with a second constant flow valve (36), and the pressure oil at the oil outlet of the first reversing valve (33) is communicated with the oil return port (T) through the second constant flow valve (36).

6. The control valve for the emergency rescue vehicle according to claim 1, wherein the oil inlet and return union (2) is provided with an electric proportional overflow valve (22), and the feedback oil path (LS) is communicated with the oil return port (T) through the electric proportional overflow valve (22).

7. The control valve for the emergency rescue vehicle according to claim 1, wherein each first working link (4) is provided with two working control valves (44), and the two working control valves (44) are in a group and respectively receive pressure oil at an oil outlet of the pressure reducing valve (31) and output the pressure oil to the first working reversing valve (42) to control the reversing of the first working reversing valve (42).

8. A control valve for an emergency rescue vehicle according to claim 1, characterized in that the first direction valve (33) is connected to the second working direction valve (52) of the second working connection (5) via a throttle bore (37).

9. The control valve for an emergency rescue vehicle according to claim 1, wherein a bidirectional lock (53) is arranged between the second working reversing valve (52) and the second working oil port (51).

10. The control valve for the emergency rescue vehicle according to claim 1, wherein the valve body (1) comprises a tail coupler (6), the feedback control coupler (3) is arranged between a first working coupler (4) and a second working coupler (5), the oil inlet and return coupler (2) is arranged outside the first working coupler (4), the tail coupler (6) is arranged outside the second working coupler (5), the tail coupler (6) is provided with a working oil port overflow valve (61), and the working oil port overflow valve (61) is arranged between a second working oil port (51) and an oil return port (T).