阅读说明：本技术 快换连接器电磁阀 (Quick-change connector electromagnetic valve ) 是由 周良峰 高皓 罗成发 胡勇 玉有恩 陈宗宜 于 2019-11-04 设计创作，主要内容包括：本发明公开了一种快换连接器电磁阀,属工程机械技术领域,该电磁阀阀本体的进油口与第一工作油口之间设有插装阀模块、电磁阀芯和液控单向阀；插装阀模块包括逻辑换向锥阀和电磁换向阀；逻辑换向锥阀的进油口和电磁换向阀的进油口均与阀本体的进油口相连通,逻辑换向锥阀的工作油口与电磁阀芯的进油口相连通,逻辑换向锥阀的弹簧腔与电磁换向阀的工作油口相连通；控制端包括第一控制端和第二控制端；第一控制端与电磁换向阀的电控端相连接；第二控制端与电磁阀芯的电控端相连接。本发明可以解决现有快换连接器电磁阀内阀体与阀芯的配合间隙有泄露以及泄露随着工作时间的增长、密封形式的受损而增大的问题。(The invention discloses a quick-change connector electromagnetic valve, which belongs to the technical field of engineering machinery.A cartridge valve module, an electromagnetic valve core and a hydraulic control one-way valve are arranged between an oil inlet and a first working oil port of an electromagnetic valve body; the cartridge valve module comprises a logic reversing cone valve and an electromagnetic reversing valve; an oil inlet of the logic reversing cone valve and an oil inlet of the electromagnetic reversing valve are communicated with an oil inlet of the valve body, a working oil port of the logic reversing cone valve is communicated with an oil inlet of the electromagnetic valve core, and a spring cavity of the logic reversing cone valve is communicated with a working oil port of the electromagnetic reversing valve; the control end comprises a first control end and a second control end; the first control end is connected with the electric control end of the electromagnetic directional valve; the second control end is connected with the electric control end of the electromagnetic valve core. The invention can solve the problems that the fit clearance between the valve body and the valve core in the electromagnetic valve of the existing quick-change connector leaks and the leakage is increased along with the increase of the working time and the damage of the sealing form.)

1. The utility model provides a quick change connector solenoid valve, includes the valve body that has control end, oil inlet, first work hydraulic fluid port, second work hydraulic fluid port and oil return opening, its characterized in that: a cartridge valve module, an electromagnetic valve core and a hydraulic control one-way valve are sequentially arranged between an oil inlet of the valve body and the first working oil port; the cartridge valve module comprises a logic reversing cone valve and an electromagnetic reversing valve; an oil inlet of the logic reversing cone valve and an oil inlet of the electromagnetic reversing valve are communicated with an oil inlet of the valve body, a working oil port of the logic reversing cone valve is communicated with an oil inlet of the electromagnetic valve core, and a spring cavity of the logic reversing cone valve is communicated with a working oil port of the electromagnetic reversing valve; the control end comprises a first control end and a second control end; the first control end is connected with the electric control end of the electromagnetic directional valve; the second control end is connected with the electric control end of the electromagnetic valve core.

2. The quick-change connector solenoid valve of claim 1, wherein: the first working oil port of the electromagnetic valve core is communicated with the oil inlet of the hydraulic control one-way valve, the oil outlet of the hydraulic control one-way valve is communicated with the first working oil port of the valve body, the second working oil port of the electromagnetic valve core and the hydraulic control port of the hydraulic control one-way valve are both communicated with the second working oil port of the valve body, and the oil return port of the electromagnetic valve core is communicated with the oil return port of the valve body.

3. The quick-change connector solenoid valve according to claim 1 or 2, characterized in that: the hydraulic control one-way valve comprises a valve core, the valve core comprises a sealing conical block which divides the interior of the hydraulic control one-way valve into a spring cavity and a piston containing cavity, a spring seat for containing a spring extends out of one side face of the sealing conical block, an oil outlet of the hydraulic control one-way valve is formed in the spring seat, a plug is sleeved outside the spring seat, and a limiting sleeve for adjusting the flow of a first working oil port of the valve body is arranged on the spring seat between the sealing conical block and the plug; the other side surface of the sealing conical block is connected with a piston positioned in the piston containing cavity; the piston containing cavity comprises a rod cavity and a rodless cavity, and an oil inlet of the hydraulic control one-way valve is formed in the wall body of the rod cavity; and a hydraulic control port of the hydraulic control one-way valve is arranged on the wall body of the rodless cavity.

4. The quick-change connector solenoid valve of claim 3, wherein: and a throttling hole is formed between the working oil port of the logic reversing cone valve and the oil inlet of the electromagnetic valve core.

5. The quick-change connector solenoid valve of claim 4, wherein: the first control end and the second control end of the valve body are respectively and correspondingly connected with the signal output end of the whole vehicle controller; the hydraulic quick-change oil cylinder is characterized in that an oil inlet of the valve body is communicated with an oil outlet of a hydraulic pump, a first working oil port of the valve body is communicated with a rodless cavity of the quick-change oil cylinder, a second working oil port of the valve body is communicated with a rod cavity of the quick-change oil cylinder, and an oil return port of the valve body is connected with an oil tank.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a quick-change connector electromagnetic valve for a quick-change hydraulic system of an excavator accessory.

Background

The quick-change connector electromagnetic valve is a device used for a quick-change hydraulic system of an excavator accessory to control a quick-change oil cylinder to clamp or release. The existing quick-change connector electromagnetic valve comprises a valve body which is cast into a whole and is provided with an electromagnetic valve core and a hydraulic control one-way valve, wherein the valve body is provided with a control end, an oil inlet, a first working oil port, a second working oil port and an oil return port; the electromagnetic valve core and the hydraulic control one-way valve are sequentially arranged between an oil inlet of the valve body and a first working oil port of the valve body, an oil inlet of the electromagnetic valve core is communicated with an oil inlet of the valve body, an oil outlet of the hydraulic control one-way valve is communicated with the first working oil port of the valve body, a second working oil port of the electromagnetic valve core is communicated with a hydraulic control end of the hydraulic control one-way valve and a second working oil port of the valve body, an oil return port of the electromagnetic valve core is communicated with an oil return port of the valve body, and an electric control end of the electromagnetic valve core is communicated. When the quick-change connector electromagnetic valve is used, the quick-change connector electromagnetic valve is installed in a quick-change hydraulic system of the excavator accessory, and when the quick-change connector electromagnetic valve works, the control end of the quick-change connector electromagnetic valve is powered on or powered off to control the quick-change oil cylinder to clamp or release, so that the quick change of the excavator accessory is completed. In practical application, because the solenoid valve core of the existing quick-change connector solenoid valve adopts a slide valve type reversing structure, leakage exists between a valve body and a valve core matching gap, the leakage amount is increased along with the increase of working time and the damage of a sealing form, and the phenomenon of uneven output flow and walking deviation between double pumps of an excavator is caused; the oil output from the hydraulic pump returns to the oil tank due to the leakage, which causes a flow loss of the hydraulic pump and affects operability.

Disclosure of Invention

The invention provides a quick-change connector electromagnetic valve which can solve the problems that a fit clearance between a valve body and a valve core in the existing quick-change connector electromagnetic valve is leaked, and the leakage is increased along with the increase of working time and the damage of a sealing form.

In order to solve the problems, the technical scheme adopted by the invention is as follows: the quick-change connector electromagnetic valve comprises a valve body with a control end, an oil inlet, a first working oil port, a second working oil port and an oil return port, wherein a cartridge valve module, an electromagnetic valve core and a hydraulic control one-way valve are sequentially arranged between the oil inlet and the first working oil port of the valve body; the cartridge valve module comprises a logic reversing cone valve and an electromagnetic reversing valve; an oil inlet of the logic reversing cone valve and an oil inlet of the electromagnetic reversing valve are communicated with an oil inlet of the valve body, a working oil port of the logic reversing cone valve is communicated with an oil inlet of the electromagnetic valve core, and a spring cavity of the logic reversing cone valve is communicated with a working oil port of the electromagnetic reversing valve; the control end comprises a first control end and a second control end; the first control end is connected with the electric control end of the electromagnetic directional valve; the second control end is connected with the electric control end of the electromagnetic valve core.

In the above technical solution, a more specific technical solution may also be: the first working oil port of the electromagnetic valve core is communicated with the oil inlet of the hydraulic control one-way valve, the oil outlet of the hydraulic control one-way valve is communicated with the first working oil port of the valve body, the second working oil port of the electromagnetic valve core and the hydraulic control port of the hydraulic control one-way valve are both communicated with the second working oil port of the valve body, and the oil return port of the electromagnetic valve core is communicated with the oil return port of the valve body.

Further: the hydraulic control one-way valve comprises a valve core, the valve core comprises a sealing conical block which divides the interior of the hydraulic control one-way valve into a spring cavity and a piston containing cavity, a spring seat for containing a spring extends out of one side face of the sealing conical block, an oil outlet of the hydraulic control one-way valve is formed in the spring seat, a plug is sleeved outside the spring seat, and a limiting sleeve for adjusting the flow of a first working oil port of the valve body is arranged on the spring seat between the sealing conical block and the plug; the other side surface of the sealing conical block is connected with a piston positioned in the piston containing cavity; the piston containing cavity comprises a rod cavity and a rodless cavity, and an oil inlet of the hydraulic control one-way valve is formed in the wall body of the rod cavity; and a hydraulic control port of the hydraulic control one-way valve is arranged on the wall body of the rodless cavity.

Further: and a throttling hole is formed between the working oil port of the logic reversing cone valve and the oil inlet of the electromagnetic valve core.

Further: the first control end and the second control end of the valve body are respectively and correspondingly connected with the signal output end of the whole vehicle controller; the hydraulic quick-change oil cylinder is characterized in that an oil inlet of the valve body is communicated with an oil outlet of a hydraulic pump, a first working oil port of the valve body is communicated with a rodless cavity of the quick-change oil cylinder, a second working oil port of the valve body is communicated with a rod cavity of the quick-change oil cylinder, and an oil return port of the valve body is connected with an oil tank.

Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:

1. the cartridge valve module, the electromagnetic valve core and the hydraulic control one-way valve are sequentially arranged between the oil inlet of the valve body and the first working oil port; the cartridge valve module comprises a logic reversing cone valve and an electromagnetic reversing valve; an oil inlet of the logic reversing cone valve and an oil inlet of the electromagnetic reversing valve are communicated with an oil inlet of the valve body, a working oil port of the logic reversing cone valve is communicated with an oil inlet of the electromagnetic valve core, and a spring cavity of the logic reversing cone valve is communicated with a working oil port of the electromagnetic reversing valve; the control end comprises a first control end and a second control end; the first control end is connected with the electric control end of the electromagnetic directional valve; the second control end is connected with the electric control end of the electromagnetic valve core; when the quick-change connector electromagnetic valve is connected in a quick-change hydraulic system of an excavator accessory, in the whole working process, the sealing cone surface of the valve core of the logic reversing cone valve is used for reversing or sealing and closing an oil path, pressure oil enters an oil inlet of the valve body, and the pressure oil firstly enters the cartridge valve module for logic control and then enters the electromagnetic valve core. The sealing form is reliable, the sealing surface is not easy to be damaged when the quick-change connector works for a long time, and therefore the problem of internal leakage of the electromagnetic valve of the quick-change connector is solved.

2. The valve core of the hydraulic control one-way valve comprises a sealing conical block which divides the interior of the hydraulic control one-way valve into a spring cavity and a piston containing cavity, a spring seat for containing a spring extends out of one side face of the sealing conical block, an oil outlet of the hydraulic control one-way valve is formed in the spring seat, a plug is sleeved outside the spring seat, and a limiting sleeve for regulating the flow of a first working oil port of the valve body is arranged on the spring seat between the sealing conical block and the plug; the opening stroke of the hydraulic control one-way valve is limited by machinery, so that the hydraulic control one-way valve has a limiting function and the maximum flow is adjustable; through the spacing size of adjusting the stop collar, can adjust the annular area size of opening of the first working oil port of valve body, and then change the maximum flow that gets into accessory quick change hydro-cylinder, played quick change connector opening speed controllable, improved operating performance's effect.

Drawings

Fig. 1 is a hydraulic schematic diagram of a quick-change connector solenoid valve according to an embodiment of the invention.

Fig. 2 is a schematic structural diagram of a quick-change connector solenoid valve according to an embodiment of the invention.

Fig. 3 is a schematic structural diagram of a pilot operated check valve according to an embodiment of the present invention.

Fig. 4 is a hydraulic schematic diagram of a quick-change hydraulic system of an excavator accessory according to an embodiment of the invention.

Detailed Description

The invention will be further described in detail with reference to the following examples:

the quick-change connector solenoid valve shown in fig. 1 and 2 comprises a valve body 1, wherein a cartridge valve module 11, a solenoid valve core 12 and a hydraulic control one-way valve 13 are integrated in the valve body 1; the hydraulic control one-way valve 13 comprises a valve core 134 as shown in fig. 3, the valve core 134 comprises a sealing conical block 1341 and a spring seat 1342, the sealing conical block 1341 divides the interior of the hydraulic control one-way valve 13 into a spring cavity and a piston accommodating cavity, the spring seat 1342 extends out from one side surface of the sealing conical block 1341, a spring 133 is arranged in the spring seat 1342, an oil outlet 13o of the hydraulic control one-way valve 13 is formed in the spring seat 1342, a plug 132 is sleeved outside the spring seat 1341, and a limit sleeve 131 is arranged on the spring seat 1342 between the sealing conical block 1341 and the plug 132; the other side surface of the sealing conical block 1341 is connected with a piston 135, and the piston 135 is positioned in the piston containing cavity; the piston containing cavity comprises a rod cavity and a rodless cavity, and an oil inlet 13P of the hydraulic control one-way valve 13 is formed in the wall body of the rod cavity; a hydraulic control port 13A of a hydraulic control one-way valve 13 is arranged on the wall body of the rodless cavity; the valve body 1 is provided with a first control end A1, a second control end A2, an oil inlet P, a first working oil port a, a second working oil port b and an oil return port T; a channel between an oil inlet P and a first working oil port a of the valve body 1 is sequentially provided with a cartridge valve module 11, an electromagnetic valve core 12 and a hydraulic control one-way valve 13; the cartridge valve module 12 comprises a logic reversing cone valve 112 and a solenoid reversing valve 111; the first control end A1 of the valve body 1 is connected with the electric control end 111A of the electromagnetic directional valve 111; the second control end A2 of the valve body 1 is connected with the electric control end 12A of the solenoid valve core 12; an oil inlet 112P of the logic reversing cone valve 112 and an oil inlet 111P of the electromagnetic reversing valve 111 are both communicated with an oil inlet P of the valve body 1, a working oil port 112a of the logic reversing cone valve 112 is communicated with an oil inlet 12P of the electromagnetic valve core 12, and a throttling hole 14 is formed between the working oil port 112a of the logic reversing cone valve 112 and the oil inlet 12P of the electromagnetic valve core 12; a spring cavity of the logic reversing cone valve 112 is communicated with a working oil port 111a of the electromagnetic reversing valve 111; the first working oil port 12a of the solenoid spool 12 is communicated with the oil inlet 13P of the hydraulic control one-way valve 13, the oil outlet 13o of the hydraulic control one-way valve 13 is communicated with the first working oil port a of the valve body 1, the second working oil port 12b of the solenoid spool 12 and the hydraulic control port 13A of the hydraulic control one-way valve 13 are both communicated with the second working oil port b of the valve body 1, and the oil return port 12T of the solenoid spool 12 and the oil return port 111T of the solenoid directional valve 111 are both communicated with the oil return port T of the valve body 1.

The electromagnetic valve of the quick-change connector is installed in a quick-change hydraulic system of an excavator accessory as shown in fig. 4, and a first control end A1 and a second control end A2 of a valve body 1 are correspondingly connected with a signal output end of a whole vehicle controller 4 respectively; an oil inlet P of the valve body 1 is communicated with an oil outlet of the hydraulic pump 2, a first working oil port a of the valve body 1 is communicated with a rodless cavity of the quick-change oil cylinder 3, a second working oil port b of the valve body 1 is communicated with a rod cavity of the quick-change oil cylinder 3, and an oil return port T of the valve body 1 is connected with an oil tank 6; and a control end of the vehicle control unit 4 is provided with a control key 5.

When the hydraulic control valve works, the electric control end of the electromagnetic reversing valve is firstly electrified through the key 5, the electromagnetic reversing valve is reversed to a stop position, at the moment, pressure oil is led to a piston cavity of the logic reversing cone valve through an oil inlet of the valve body, the piston is pushed to open the cone valve, and the pressure oil reaches the electromagnetic valve core through the cone valve and the throttling hole; then, the second control end controls the electric control end of the electromagnetic valve core to be powered on or powered off through the key 5, the electromagnetic valve core is reversed, and the quick-change oil cylinder is controlled to be clamped or released, so that the quick change of the excavator accessory is completed; in the process, the limiting size of the limiting sleeve is changed, the opening annular area of the first working oil port of the valve body can be adjusted, the maximum flow entering the quick-change oil cylinder of the accessory is further changed, and if the reversing opening degree of the electromagnetic valve of the quick-change connector is further increased, the valve core of the one-way valve is limited by the limiting sleeve and cannot be opened for a larger stroke, and the designed maximum flow is kept through the flow of the one-way valve; the quick-change connector has the advantages of controllable opening speed and improved operating performance.

After the work is finished, the electromagnetic directional valve is in a power-off state, the electromagnetic directional valve is in a conducting state at the moment, the oil inlet of the valve body is communicated with the logic directional cone valve spring cavity, pressure oil enters the logic directional cone valve spring cavity, the piston is pushed reversely to enable the sealing cone surface of the cone valve core to close the oil path, and then the whole quick-change connector electromagnetic valve is in a closing state.

In the whole working process, the sealing cone of the cone valve core is used for reversing or sealing and closing the oil way, so that the sealing form is reliable, the sealing surface is not easy to damage after long-time working, and the problem of internal leakage of the electromagnetic valve of the quick-change connector is solved.