Control valve and engineering machinery

Abstract

The utility model provides a control valve and engineering machinery, the control valve comprises a valve block, the two ends of the valve block are respectively provided with a magnetic tube, the valve block is internally provided with a valve cavity, the valve cavity is internally provided with a valve core capable of moving in the valve cavity, the valve block is respectively provided with a left cavity, a middle cavity and a right cavity which can be communicated with each other, and the left cavity, the middle cavity and the right cavity are communicated with each other. The left cavity, the middle cavity and the right cavity can be communicated with the valve element, and an overflow valve capable of being communicated with the valve element is further arranged on the valve block. According to the control valve of the structure, the valve element capable of moving left and right is arranged in the valve cavity, the left cavity, the middle cavity and the right cavity which can be communicated with one another are formed in the valve block, the overflow valve is arranged on the valve block, the default state is that the control valve works in the middle position, when an electrical part breaks down, the motor can still rotate forwards, and at the moment, relevant parts can still be cooled; normal operation of equipment is guaranteed, and use of the equipment is not affected. In addition, the motor also has the functions of motor forward rotation, reverse rotation, unloading, overpressure protection and oil supplementation, and the structure is simpler and more compact.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery, in particular to a control valve and engineering machinery. Background Art

[0002] Control valves, as a hydraulic component, are widely used in various engineering machinery. Fan motor control valves are used to control the rotation of fan motors to provide cooling air for related components. However, the fan motor control valves that are currently widely used are usually three-position four-way electromagnetic reversing valves. During use, when the fan motor control valve is in the middle position or the electrical part fails, the control valve stops working. At this time, the fan also stops rotating and cannot further cool the equipment. In addition, there are problems such as the structure is not compact enough, the reversing is not smooth enough, and the function is relatively single.

[0003] In summary, how to provide a control valve with a simple and compact structure, smooth switching, and integrating functions such as unloading, overpressure protection, and oil replenishment, as well as engineering machinery including this control valve, has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a control valve with simple and compact structure, smooth switching, and integrating functions such as unloading, overpressure protection, and oil replenishment, as well as engineering machinery including the control valve.

[0005] The solution of the utility model is implemented as follows: the utility model proposes a control valve, including a valve block, a magnetic tube is respectively provided at both ends of the valve block, a valve cavity is provided in the valve block, a valve core that can move in the valve cavity is provided in the valve cavity, a left cavity, a middle cavity and a right cavity that can be interconnected are respectively opened on the valve block, and the left cavity, the middle cavity and the right cavity can be respectively connected with the valve core, and a relief valve that can be connected with the valve core is also provided on the valve block. The control valve of this structure is provided with a valve core that can move left and right in the valve cavity, a left cavity, a middle cavity and a right cavity that can be interconnected are opened on the valve block, and a relief valve is provided on the valve block. The default state is that the control valve works in the middle position. When the electrical part fails, the motor can still rotate forward. At this time, the related components can still be cooled to ensure the normal operation of the equipment without affecting the use of the equipment. In addition, it also has the functions of motor forward rotation, reverse rotation, unloading, overpressure protection, and oil replenishment, and the structure is also simpler and more compact.

[0006] Another technical solution of the utility model is that on the basis of the above, an oil channel is further provided in the valve block, and the oil channel is communicated with the left cavity, the middle cavity and the right cavity respectively.

[0007] Another technical solution of the utility model is that on the basis of the above, a plurality of plugs are further provided on the valve block, and the plurality of plugs are respectively arranged at one end of the left cavity, the middle cavity and the right cavity away from the valve core.

[0008] Another technical solution of the utility model is that on the basis of the above, the plug includes a first plug, a second plug and a third plug which are arranged in sequence, the first plug is arranged on the left cavity, the second plug is arranged on the middle cavity, and the third plug is arranged on the right cavity.

[0009] Another technical solution of the utility model is that on the basis of the above, the valve block is further provided with a first oil inlet chamber and a second oil inlet chamber, the second oil inlet chamber is arranged on one side of the first oil inlet chamber, and the first oil inlet chamber and the second oil inlet chamber can be connected to each other.

[0010] Another technical solution of the utility model is that on the basis of the above, the valve block is further provided with a first working port and a second working port connected with the valve cavity, and the second working port is arranged on one side of the first working port.

[0011] Another technical solution of the utility model is that on the basis of the above, two ends of the valve core are respectively provided with a first spring cavity and a second spring cavity, and the first spring cavity and the second spring cavity are respectively provided with a first spring and a second spring.

[0012] Another technical solution of the utility model is that on the basis of the above, the two ends of the valve core are respectively provided with a first spring pad and a second spring pad, one end of the first spring is abutted against the first spring pad, and one end of the second spring is abutted against the second spring pad.

[0013] Another technical solution of the utility model is that on the basis of the above, the magnetic tube includes a first magnetic tube and a second magnetic tube, the first magnetic tube and the second magnetic tube are respectively arranged at two ends of the valve block, and the first magnetic tube and the second magnetic tube are also respectively provided with a first coil and a second coil.

[0014] In addition, the utility model also proposes an engineering machine, including a hydraulic system, wherein the hydraulic system includes a fan motor control valve, and the fan motor control valve is the control valve as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] Figure 1 This is a structural schematic diagram of a control valve of the utility model;

[0017] Figure 2 for Figure 1 Schematic cross-sectional view along the AA direction;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure of the oil port and chamber;

[0019] Figure 4 for Figure 1 A cross-sectional schematic diagram along the BB direction;

[0020] Figure 5 The utility model is a working principle diagram of a control valve.

[0021] The corresponding relationship of the reference numerals is:

[0022] 1First magnetic tube 2Valve block 3Valve core

[0023] 4First spring pad 5First spring 6First plug

[0024] 7 overflow valve 8 first spring chamber 9 left chamber

[0025] 10 middle cavity 11 right cavity 12 second spring cavity

[0026] 13 first working port 14 first oil inlet cavity 15 second oil inlet cavity

[0027] 16 Second working port 17 Oil channel 18 Second magnetic tube

[0028] 19 second plug 20 third plug 21 first coil

[0029] 22 second coil 23 second spring 24 second spring pad

[0030] 25 valve chamber 26 fan motor 27 fan motor control valve DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. In addition, those skilled in the art can make corresponding combinations of the features in the embodiments and in different embodiments of the present invention according to the description of this document.

[0032] The utility model embodiments are as follows, see Figures 1 to 5The control valve shown is used to control the forward rotation, reverse rotation and unloading of the fan motor. Its structure specifically includes a valve block 2, and magnetic tubes are respectively provided at the left and right ends of the valve block 2. A hollow valve cavity 25 is provided in the valve block 2, and a valve core 3 that can move left and right in the valve cavity 25 is provided in the valve cavity 25. The valve block 2 is also provided with a left cavity 9, a middle cavity 10 and a right cavity 11 that can be interconnected, and the left cavity 9, the middle cavity 10 and the right cavity 11 can be connected to the valve core 3 respectively. The control valve of this structure is provided with a valve core 3 that can move left and right in the valve cavity 25, and a left cavity 9, a middle cavity 10 and a right cavity 11 that can be interconnected are provided on the valve block 2, and a relief valve 7 is provided on the valve block 2, and the relief valve 7 is preferably a one-way relief valve. The default state is the middle position operation of the control valve. When the electrical part fails, the motor can still rotate forward. At this time, the relevant components can still be cooled to ensure the normal operation of the equipment without affecting the use of the equipment. In addition, it also has motor forward rotation, reverse rotation, unloading, overvoltage protection, and oil replenishment functions, and the structure is simpler and more compact.

[0033] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, a horizontally arranged oil passage 17 is also provided in the valve block 2, and the oil passage 17 is respectively connected to the left chamber 9, the middle chamber 10 and the right chamber 11. More specifically, the left and right ends of the oil passage 17 are respectively connected to the left chamber 9 and the right chamber 11, and the middle part of the oil passage 17 is connected to the middle chamber 10.

[0034] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the valve block 2 is also provided with a plurality of plugs, which are respectively arranged at one end of the left cavity 9, the middle cavity 10 and the right cavity 11, and are respectively used to block the end of the left cavity 9, the middle cavity 10 and the right cavity 11 away from the valve core 3, that is, the lower end shown in the figure.

[0035] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the plug includes a first plug 6, a second plug 19 and a third plug 20 which are arranged in sequence. More specifically, the first plug 6 is arranged on the left cavity 9, the second plug 19 is arranged on the middle cavity 10, and the third plug 20 is arranged on the right cavity 11.

[0036] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the valve block 2 is also provided with a first oil inlet chamber 14 and a second oil inlet chamber 15, which are specifically arranged in the valve chamber 25. The second oil inlet chamber 15 is arranged on one side of the first oil inlet chamber 14, that is, the right side shown in the figure. The first oil inlet chamber 14 and the second oil inlet chamber 15 can be connected to each other.

[0037] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the valve block 2 is also provided with a first working port 13 and a second working port 16 connected to the valve chamber 25, and the second working port 16 is arranged on one side of the first working port 13. The first working port 13 and the second working port 16 are arranged opposite to the first plug 6, the second plug 19 and the third plug 20, that is, they are respectively arranged at the upper end and the lower end of the valve block 2 shown in the figure.

[0038] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the left and right ends of the valve core 3 are respectively provided with a first spring chamber 8 and a second spring chamber 12, in which the first spring chamber 8 and the second spring chamber 12 are respectively provided with a first spring 5 and a second spring 23, and both the first spring 5 and the second spring 23 are return springs.

[0039] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the left and right ends of the valve core 3 are respectively provided with a first spring pad 4 and a second spring pad 24 , one end of the first spring 5 , i.e. the left end shown in the figure, abuts against the right end of the first spring pad 4 , and the right end of the second spring 23 abuts against the left end of the second spring pad 24 .

[0040] Based on the above embodiment, in another embodiment of the utility model, as Figure 2 and Figure 3 As shown, the magnetic tube specifically includes a first magnetic tube 1 and a second magnetic tube 18. The first magnetic tube 1 and the second magnetic tube 18 are respectively arranged at two ends of the valve block 2, and the first magnetic tube 1 and the second magnetic tube 18 are also respectively provided with a first coil 21 and a second coil 22.

[0041] The control valve of the above structure is used to control the fan motor 26. Figure 5 As shown, the control valve is a three-position four-way electromagnetic reversing valve. By setting a valve core 3 that can move left and right in the valve cavity 25, opening a left cavity 9, a middle cavity 10 and a right cavity 11 that can communicate with each other on the valve block 2, and setting a relief valve 7 on the valve block 2, even when the control valve is working in the middle position or the electrical part fails, the motor can still rotate forward. At this time, the relevant components can still be cooled to ensure the normal operation of the equipment without affecting the use of the equipment. In addition, it also has the motor forward, reverse, unloading, overpressure protection, and oil replenishment functions, and the structure is simpler and more compact.

[0042] In addition, the utility model also provides an engineering machine, including a hydraulic system, such as Figure 5As shown, the hydraulic system includes a fan motor control valve 27 , which is specifically a control valve as described above.

[0043] Accordingly, the engineering machinery with this structure has the advantages of higher working efficiency and lower failure rate.

[0044] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A control valve, characterized in that: It includes a valve block, wherein both ends of the valve block are respectively provided with magnetic tubes, a valve cavity is provided in the valve block, a valve core that can move in the valve cavity is provided in the valve cavity, a left cavity, a middle cavity and a right cavity that can be interconnected are respectively opened on the valve block, and the left cavity, the middle cavity and the right cavity can be respectively connected to the valve core, and the valve block is also provided with an overflow valve that can be connected to the valve core.

2. The control valve according to claim 1, characterized in that: The valve block is also provided with an oil passage, which is communicated with the left cavity, the middle cavity and the right cavity respectively.

3. The control valve according to claim 2, characterized in that: The valve block is also provided with a plurality of plugs, which are respectively arranged at one end of the left cavity, the middle cavity and the right cavity away from the valve core.

4. The control valve according to claim 3, characterized in that: The plug includes a first plug, a second plug and a third plug which are arranged in sequence, the first plug is arranged on the left cavity, the second plug is arranged on the middle cavity, and the third plug is arranged on the right cavity.

5. The control valve according to claim 4, characterized in that: The valve block is also provided with a first oil inlet chamber and a second oil inlet chamber, respectively. The second oil inlet chamber is arranged at one side of the first oil inlet chamber, and the first oil inlet chamber and the second oil inlet chamber can be communicated with each other.

6. The control valve according to claim 5, characterized in that The valve block is also provided with a first working port and a second working port communicating with the valve cavity, and the second working port is arranged at one side of the first working port.

7. The control valve according to claim 6, characterized in that: The two ends of the valve core are respectively provided with a first spring cavity and a second spring cavity, and the first spring cavity and the second spring cavity are respectively provided with a first spring and a second spring.

8. The control valve according to claim 7, characterized in that: A first spring pad and a second spring pad are respectively disposed at both ends of the valve core, one end of the first spring abuts against the first spring pad, and one end of the second spring abuts against the second spring pad.

9. The control valve according to claim 8, characterized in that The magnetic tube includes a first magnetic tube and a second magnetic tube. The first magnetic tube and the second magnetic tube are respectively arranged at two ends of the valve block. The first magnetic tube and the second magnetic tube are also respectively provided with a first coil and a second coil.

10. An engineering machine, comprising a hydraulic system, wherein the hydraulic system comprises a fan motor control valve, characterized in that: The fan motor control valve is the control valve according to any one of claims 1 to 9.

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