CN204152871U - A kind of truck crane multi-way valve - Google Patents

A kind of truck crane multi-way valve Download PDF

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Publication number
CN204152871U
CN204152871U CN201420518278.3U CN201420518278U CN204152871U CN 204152871 U CN204152871 U CN 204152871U CN 201420518278 U CN201420518278 U CN 201420518278U CN 204152871 U CN204152871 U CN 204152871U
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China
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valve
oil
elevator
connection
directional control
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CN201420518278.3U
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竺浩君
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NINGBO BOLEV HYDRAULICS CO Ltd
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NINGBO BOLEV HYDRAULICS CO Ltd
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Abstract

The utility model discloses a kind of truck crane multi-way valve, it is characterized in that: revolution connection uses independently the first oil sources, Fill valve is provided with respectively and between oil return runner at the working hole of slewing directional control valve, the valve rod of described slewing directional control valve has two meta unloading channels, when described slewing directional control valve is positioned at meta, one of them meta unloading channel of described two meta unloading channels makes O chamber communicate with oil return runner, and another meta unloading channel makes W chamber communicate with oil return runner.The utility model utilizes separately an independent oil sources to carry out fuel feeding to revolution connection, eliminate other work connection to the impact of revolution connection, by the size of the area of passage of meta unloading channel, slow down the speed of revolution braking suddenly, meanwhile, because braking suddenly, the space of the instantaneous appearance of another active side, repairing can be carried out by repairing one-way valve from oil return runner, thus make the utility model have good revolution cushioning effect.

Description

A kind of truck crane multi-way valve
Technical field
The utility model relates to a kind of multi-way valve, particularly a kind of truck crane multi-way valve.
Background technique
For the little tonnage truck crane of existing 8 ~ 12 tons of specifications, the multi-way valve of usual employing throttle grverning, each valve block will arrange the oil return runner that can be born high pressure, simultaneously, oil return runner needs are caused to bear higher working pressure, make to need to thicken oil return runner wall thickness, cause multi-way valve overall volume huge.
In addition; the truck crane of little tonnage specification is inner all without corresponding buffer protection device at revolution work connection; when when rotary table high speed rotating; if braked suddenly; turntable can be subject to a very large inertia impact load, causes the damage of each structural member of hoist, driving component, especially carries in movement process at hoist band; unexpected braking is entail dangers to life even, causes the safety problems such as material damage.For this reason, some enterprise adopts the mode of external trimmer valve to carry out buffer protection, but adopts in this way, and multi-way valve volume is increased, and form structure becomes complicated.
In addition, the multi-way valve that existing little tonnage truck crane adopts, its general only employing 2 independent oil sources, utilize two hydraulic-pressure pumps as the power resources of crane hydraulic system.Therefore, usually the revolution work connection in multi-way valve, flexible work connection and luffing work are allied the communists with an oil sources, because revolution work is combined with an oil sources, when crane loading weight does combinative movement, revolution action will be subject to the interference of other motions, reduce the stability of revolution action, have impact on the performance that speed regulates.
Model utility content
The technical problems to be solved in the utility model is the present situation for prior art, and provide a kind of volume little, stability is high, and Safety performance is good, has the truck crane multi-way valve of internal damping protective function.
The utility model solves the problems of the technologies described above adopted technological scheme: a kind of truck crane multi-way valve, comprise multiple work connection such as revolution connection and elevator connection, described revolution connection comprises rotary valve body, described rotary valve body is provided with slewing directional control valve, it is characterized in that: described multi-way valve has multiple independent oil sources, and share an oil return runner, described revolution connection uses independently the first oil sources, revolution relief valve is provided with between the filler opening and oil return runner of described slewing directional control valve, the first repairing one-way valve is provided with between first working hole and oil return runner of described slewing directional control valve, the second repairing one-way valve is provided with between second working hole and oil return runner of described slewing directional control valve, in addition, described rotary valve body has the O chamber communicated with the first working hole of described slewing directional control valve and the W chamber communicated with the second working hole of described slewing directional control valve, the valve rod of described slewing directional control valve has two meta unloading channels, when described slewing directional control valve is positioned at meta, one of them meta unloading channel of described two meta unloading channels makes O chamber communicate with oil return runner, another meta unloading channel makes W chamber communicate with oil return runner.
As improvement, a meta unloading channel is provided with the skewed slot being inclined to described O chamber wherein, and another meta unloading channel is provided with another skewed slot being inclined to described W chamber.
Improve again, described multiple work connection also comprises flexible connection and luffing connection, describedly flexiblely comprise flexible selector valve, described luffing connection comprises luffing selector valve, described flexible and luffing is allied the communists and is used the second oil sources, described elevator connection comprises elevator valve body, described elevator valve body is provided with elevator selector valve, described elevator connection uses independently the 3rd oil sources, the filler opening of described second oil sources is through described flexible selector valve, communicate with described oil return runner after luffing selector valve and elevator selector valve, described flexible selector valve, luffing selector valve and the conducting of elevator selector valve three meta, other working position of described elevator selector valve cuts off mutually with described oil return runner, the filler opening of described second oil sources is connected with an one-way valve after luffing selector valve through described flexible selector valve, this one-way valve communicates with the filler opening of described 3rd oil sources.
Improve again, described elevator valve body is provided with two of communicating with the filler opening of described second oil sources and carrys out oil pocket, described elevator valve body has two oil back chambers communicated with described oil return runner, described elevator selector valve valve rod has to come with one of them that oil pocket communicates carry out hydraulic fluid port and come that oil pocket communicates with another another carry out hydraulic fluid port, another return opening described elevator selector valve valve rod having the return opening communicated with one of them oil back chamber and communicates with another oil back chamber, described elevator selector valve stem internal be provided be communicated with described one of them carry out the pressure releasing passages of hydraulic fluid port and one of them return opening, also be provided with at described elevator selector valve stem internal and be communicated with described another and carry out another pressure releasing passages of hydraulic fluid port and another return opening.
Compared with prior art, the utility model has the advantage of: utilize separately an independent oil sources to carry out fuel feeding to revolution connection, eliminate other work connection to the impact of revolution connection, simultaneously, the same oil return runner that each work is allied the communists, oil return runner only bears lower return pressure, make multi-way valve can adopt cast structure form, significantly reduce the physical dimension of wall thickness and multi-way valve, in addition, can be debugged by test of many times, determine the size of the area of passage of meta unloading channel, when swirl gear forward or reverse stops suddenly, meta unloading channel in slewing directional control valve can relief portion partial pressure, ensure suitable instantaneous pressure, there is the ability slowing down the speed that revolution is braked suddenly, the capability of fast response of highly sensitive revolution relief valve, also can to prune spike pressure, simultaneously, because of braking suddenly, the space of the instantaneous appearance of another active side, repairing can be carried out from oil return runner by repairing one-way valve, thus make the utility model have good revolution cushioning effect.
Accompanying drawing explanation
Fig. 1 is hydraulic structure schematic diagram in the utility model embodiment;
Fig. 2 is the structural representation turning round connection in the utility model embodiment;
Fig. 3 is the sectional view at A-A place in Fig. 2;
Fig. 4 is the partial enlarged drawing at C place in Fig. 2;
Fig. 5 is the comparison diagram that elevator joins lifting velocity curve before changing;
Fig. 6 is the hydraulic structure schematic diagram collaborating speed governing in Fig. 1;
Fig. 7 is the structural representation of elevator connection in the utility model embodiment;
Fig. 8 is the structural representation of existing elevator connection;
Fig. 9 is the structural representation after the movement of elevator selector valve valve rod in Fig. 8;
Figure 10 is the partial enlarged drawing at D place in Fig. 7;
Figure 11 is the partial enlarged drawing at E place in Fig. 7;
Figure 12 is the structural representation of one-way valve.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
As shown in Fig. 1 to 12, truck crane multi-way valve in this enforcement, comprise revolution connection 1, elevator connection 5, flexible connection and luffing connection etc., revolution connection 1 comprises rotary valve body 11, slewing directional control valve 12, revolution relief valve 13, first repairing one-way valve 15 and the second repairing one-way valve 14 etc., elevator connection 5 comprises elevator selector valve 52, and luffing connection comprises luffing selector valve 3, flexiblely comprises flexible selector valve 2.
Wherein, the rotary valve body 11 of revolution connection 1 is provided with slewing directional control valve 12, multi-way valve has multiple independent oil sources, and share an oil return runner T, revolution connection 1 uses independently the first oil sources, the oil inlet P 1 of this first oil sources is the filler opening of slewing directional control valve 12, be provided with between the filler opening and oil return runner T of slewing directional control valve 12 and turn round relief valve 13, the first repairing one-way valve 15 is provided with between the first working hole A1 and oil return runner T of slewing directional control valve, the second repairing one-way valve 14 is provided with between the second working hole B1 and oil return runner T of slewing directional control valve, in addition, rotary valve body 11 has the O chamber communicated with the first working hole A1 of slewing directional control valve and the W chamber communicated with the second working hole B1 of slewing directional control valve, slewing directional control valve valve rod 121 has two meta unloading channels 122, when slewing directional control valve 12 is positioned at meta, one of them meta unloading channel 122 of two meta unloading channels 122 makes O chamber and oil return runner T-phase lead to, another meta unloading channel 122 makes W chamber and oil return runner T-phase lead to.When swirl gear rotate forward stop suddenly time, the second working hole B1 of slewing directional control valve there will be a compression shock value, and the active side of the first working hole A1 of slewing directional control valve there will be space, by the first repairing one-way valve 15 from oil return runner T repairing.Otherwise, by the second repairing one-way valve 14 from the repairing of oil return runner.
Skewed slot 123 is when swirl gear forward or reverse stops suddenly herein, meta unloading channel 122 in slewing directional control valve 12 can relief portion partial pressure, ensure suitable instantaneous pressure, there is the ability slowing down the speed that revolution is braked suddenly, meta unloading channel 122 is the expansion of skewed slot 123, skewed slot 123 and return opening throttling when meta are linked up, the size of the area of passage of meta unloading channel 122, determined by test of many times debugging.
In addition, the utility model is opened and can be carried out speed adjustment by the mode of collaborating and shunt to hoisting mechanism, improves lifting-speed.Be specially:
Flexible connection and luffing are allied the communists and are used the second oil sources, the label of the filler opening of the second oil sources is P2, elevator connection 5 comprises elevator valve body 51, elevator valve body 51 is provided with elevator selector valve 52, elevator connection 5 uses independently the 3rd oil sources, the label of the filler opening of the 3rd oil sources is P3, the label of the first actuator port of elevator selector valve is A4, the label of the second actuator port of elevator selector valve is B4, the oil inlet P 2 of the second oil sources is through flexible selector valve 2, logical with oil return runner T-phase after luffing selector valve 3 and elevator selector valve 52, flexible selector valve 2, luffing selector valve 3 and the conducting of elevator selector valve 52 three meta, other working position and the oil return runner T-phase of elevator selector valve 52 are cut off, the oil inlet P 2 of the second oil sources is connected with an one-way valve 4 after luffing selector valve 3 through flexible selector valve 2, this one-way valve 4 communicates with the oil inlet P 3 of the 3rd oil sources.
Hoisting mechanism is collaborated and shunts in speed governing, flexible selector valve 2 and luffing selector valve 3 are all in meta state, when elevator selector valve 52 is in meta state, the oil inlet P 2 of the second oil sources is led to oil return runner T-phase, the hydraulic oil of the second oil sources is back to fuel tank, be in SHUNT state, as shown in thick dashed line in Fig. 1; Along with the opening of elevator selector valve changes, the hydraulic oil that elevator selector valve 52 has cut off the oil inlet P 2 of the second oil sources is back to the oil circuit of fuel tank, make the hydraulic oil of the oil inlet P 2 of the second oil sources can only after one-way valve 4, collaborate with oil inlet P 3 hydraulic oil of the 3rd oil sources, increase the flow of elevator connection 5, for interflow state, as shown in Fig. 6 thick dashed line.
In addition, the pump of existing winch carrys out oily unloading channel, adopt the secondary covering structure of working range 56 ', its speed adjusting performance is poor, as shown in Figure 8.For this reason, the utility model adopts working range plus lap structure 56, improve its speed adjusting performance, be specially: on elevator valve body 51, be provided with two of communicating with the oil inlet P 2 of the second oil sources carry out oil pocket, elevator valve body 51 has two oil back chambers logical with oil return runner T-phase, elevator selector valve valve rod 521 has to come with one of them that oil pocket 53 communicates carry out hydraulic fluid port 522 and come that oil pocket 53 ' communicates with another another carry out hydraulic fluid port 522 ', another return opening 524 ' elevator selector valve valve rod 521 having the return opening 524 communicated with one of them oil back chamber 54 and communicates with another oil back chamber 54 ', be provided with in elevator selector valve valve rod 521 inside and be communicated with the pressure releasing passages 523 that one of them comes hydraulic fluid port 522 and one of them return opening 524, also be provided with in elevator selector valve valve rod 521 inside and be communicated with another pressure releasing passages 523 ' that another comes hydraulic fluid port 522 ' and another return opening 524 '.Elevator selector valve valve rod 521 left and right displacement, can change the covering amount that two any one coming in hydraulic fluid port carry out hydraulic fluid port, realize adjust flux, reach the object of speed governing, improve speed adjusting performance.
The utility model utilizes separately an independent oil sources to carry out fuel feeding to revolution connection 1, eliminates other work connection to the impact of revolution connection 1; Meanwhile, respectively work the same oil return runner T allied the communists, and oil return runner T only bears lower return pressure, makes multi-way valve can adopt cast structure form, significantly reduces the physical dimension of wall thickness and multi-way valve; Meta unloading channel 122 is utilized to realize the meta off-load ability of slewing directional control valve 12, slow down the speed of revolution braking suddenly, utilize the capability of fast response of highly sensitive revolution relief valve 13, to prune spike pressure, when braking because of unexpected, occur space another active side is instantaneous, repairing one-way valve can by carrying out repairing from oil return runner T to it, thus make the utility model have good revolution cushioning effect; In addition, the utility model improves the speed adjusting performance of traditional multi-way valve, has structurally abandoned conventional structure bears covering design at working range, has avoided valve rod when initial position, and P3 to A, B mouth just have larger logical pasta to amass, and speed adjusting performance is poor; The utility model adopts the pressure releasing passages of stem internal to carry out drain charge, and P3 to A, B mouth are plus lap structure, and valve rod is when moving, and displacement is greater than covering amount, and logical pasta is long-pending just progressively to be increased, and speed adjusting performance is greatly improved.

Claims (4)

1. a truck crane multi-way valve, comprise multiple work connection with revolution connection and elevator connection, described revolution connection comprises rotary valve body, described rotary valve body is provided with slewing directional control valve, it is characterized in that: described multi-way valve has multiple independent oil sources, and share an oil return runner, described revolution connection uses independently the first oil sources, revolution relief valve is provided with between the filler opening and oil return runner of described slewing directional control valve, the first repairing one-way valve is provided with between first working hole and oil return runner of described slewing directional control valve, the second repairing one-way valve is provided with between second working hole and oil return runner of described slewing directional control valve, described rotary valve body has the O chamber communicated with the first working hole of described slewing directional control valve and the W chamber communicated with the second working hole of described slewing directional control valve, the valve rod of described slewing directional control valve has two meta unloading channels, when described slewing directional control valve is positioned at meta, one of them meta unloading channel of described two meta unloading channels makes O chamber communicate with oil return runner, another meta unloading channel makes W chamber communicate with oil return runner.
2. truck crane multi-way valve according to claim 1, is characterized in that: a meta unloading channel is provided with the skewed slot being inclined to described O chamber wherein, and another meta unloading channel is provided with another skewed slot being inclined to described W chamber.
3. truck crane multi-way valve according to claim 1 and 2, it is characterized in that: described multiple work connection also comprises flexible connection and luffing connection, describedly flexiblely comprise flexible selector valve, described luffing connection comprises luffing selector valve, described flexible and luffing is allied the communists and is used the second oil sources, described elevator connection comprises elevator valve body, described elevator valve body is provided with elevator selector valve, described elevator connection uses independently the 3rd oil sources, the filler opening of described second oil sources is through described flexible selector valve, communicate with described oil return runner after luffing selector valve and elevator selector valve, described flexible selector valve, luffing selector valve and the conducting of elevator selector valve three meta, other working position of described elevator selector valve cuts off mutually with described oil return runner, the filler opening of described second oil sources is connected with an one-way valve after luffing selector valve through described flexible selector valve, this one-way valve communicates with the filler opening of described 3rd oil sources.
4. truck crane multi-way valve according to claim 3, it is characterized in that: on described elevator valve body, be provided with two of communicating with the filler opening of described second oil sources carry out oil pocket, described elevator valve body has two oil back chambers communicated with described oil return runner, described elevator selector valve valve rod has to come with one of them that oil pocket communicates carry out hydraulic fluid port and come that oil pocket communicates with another another carry out hydraulic fluid port, another return opening described elevator selector valve valve rod having the return opening communicated with one of them oil back chamber and communicates with another oil back chamber, described elevator selector valve stem internal be provided be communicated with described one of them carry out the pressure releasing passages of hydraulic fluid port and one of them return opening, also be provided with at described elevator selector valve stem internal and be communicated with described another and carry out another pressure releasing passages of hydraulic fluid port and another return opening.
CN201420518278.3U 2014-09-11 2014-09-11 A kind of truck crane multi-way valve Active CN204152871U (en)

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CN201420518278.3U CN204152871U (en) 2014-09-11 2014-09-11 A kind of truck crane multi-way valve

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822794A (en) * 2016-05-17 2016-08-03 华南理工大学 Valve
CN108644418A (en) * 2018-05-18 2018-10-12 宁波真格液压科技有限公司 A kind of hydraulic control device for agricultural machinery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105822794A (en) * 2016-05-17 2016-08-03 华南理工大学 Valve
CN108644418A (en) * 2018-05-18 2018-10-12 宁波真格液压科技有限公司 A kind of hydraulic control device for agricultural machinery
CN108644418B (en) * 2018-05-18 2019-12-24 江苏南京白马现代农业高新技术产业园有限公司 Hydraulic control device for agricultural machinery

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