CN218953680U - Hydraulic system for controlling rapid action of load - Google Patents

Abstract

The utility model discloses a hydraulic system for controlling rapid action of a load, which comprises an oil tank, a first oil pump, a hydraulic valve assembly and a cooling device, wherein the hydraulic valve assembly comprises a valve block, a valve core assembly and a switching valve, the valve block is provided with an oil inlet, an oil outlet, an oil return port, a valve cavity, a first branch, a second branch and a third branch, the oil inlet is sequentially connected with the first oil pump and the oil tank through pipelines, the oil outlet is connected with the load, the oil return port is connected with the oil tank, the oil inlet, the oil outlet and the valve cavity are mutually communicated through the first branch, the oil inlet is communicated with the oil return port through the second branch, an overflow valve is arranged on the second branch, the valve cavity is communicated with the oil return port through the communication port, the valve cavity is controlled to be on-off with the communication port through the valve core assembly, the valve cavity is communicated with the oil return port through the third branch, the on-off of the third branch is controlled through the switching valve, the time required for overcoming the resilience force of an elastic piece is saved, and the cutting efficiency is further improved.

Description

Hydraulic system for controlling rapid action of load

Technical Field

The utility model relates to the technical field of hydraulic systems, in particular to a hydraulic system for controlling rapid action of a load.

Background

The hydraulic system of the existing wire cutting equipment comprises an oil tank, a hydraulic pump, a hydraulic valve and a load, wherein the load is generally a hydraulic cylinder, the hydraulic cylinder specifically comprises a cylinder body, a piston rod and an elastic piece, the output end of the piston rod is connected with a cutting tool, the piston rod can act under the action of hydraulic oil to perform cutting operation, and the piston rod can be quickly reset under the action of resilience force of the elastic piece.

The working principle of the existing hydraulic cylinder is that the resilience force of an elastic piece is generally 3Mpa, when the hydraulic cylinder works, the acting force of hydraulic oil on a piston rod firstly rises from 0Mpa to 3Mpa to overcome the resilience force of the elastic piece, then rises from 3Mpa to 20Mpa to drive the piston rod to act to realize cutting operation, after cutting is completed, the hydraulic pump stops oil supply, so that the acting force of the hydraulic oil on the piston rod is restored to 0Mpa, and at the moment, the piston rod is quickly reset under the action of the elastic piece.

Disclosure of Invention

The utility model aims to provide a hydraulic system for controlling rapid action of a load, wherein the oil pressure in a hydraulic valve is kept to be slightly less than X Mpa when an oil pump is in a standby state, and the pressure of hydraulic oil is directly increased from X Mpa to Y Mpa when the oil pump supplies oil, so that the time for overcoming the resilience force of an elastic piece is saved, and the cutting efficiency is further improved.

The technical aim of the utility model is realized by the following technical scheme: the utility model provides a hydraulic system of control load rapid action, which comprises an oil tank, first oil pump, hydraulic valve assembly and cooling device, hydraulic valve assembly includes the valve piece, case subassembly and diverter valve, the valve piece is equipped with the oil inlet, the oil-out, the oil return opening, the valve pocket, first branch road, second branch road and third branch road, the bore of oil inlet is a millimeter, the oil inlet passes through first oil pump and oil tank in proper order, the oil-out is connected with the load, the oil return opening passes through the pipeline and connects the oil tank, oil inlet, oil-out and valve pocket are through first branch road intercommunication, the oil inlet passes through second branch road and oil return opening intercommunication, be equipped with the overflow valve on the second branch road, the oil inlet sets up the check valve, the valve pocket passes through intercommunication mouth and oil return opening intercommunication, the case subassembly sets up in the valve pocket, the break-make with the intercommunication mouth through case subassembly control, the valve pocket passes through third branch road and oil return opening intercommunication, the diverter valve is fixed to be set up on the valve piece, the break-make through the diverter valve control third branch road, cooling device is used for cooling the hydraulic oil in the oil tank.

Further, the caliber of the oil inlet (311) is a millimeter, wherein 25 is more than or equal to a is more than or equal to 15.

Further, the valve cavity is provided with two groups of valve ports which are arranged in parallel on the valve block, the lower ends of the two valve cavities are provided with two groups of valve ports which are in one-to-one correspondence with the valve cavity, the valve core component is provided with two groups of valve cores which are arranged in the valve cavity, the oil outlets are provided with two groups of valve cores which are arranged in parallel on the valve block, the two oil outlets are mutually communicated with the first branch, the two valve cavities are respectively communicated with the third branch, and the caliber of the oil inlet is b millimeters, wherein the caliber of the oil inlet is 2.5 a is more than or equal to b and is more than or equal to 1.5a.

Further, adjacent ends of the two valve cavities are communicated.

Further, a pressure detector is arranged on the valve block, and the pressure detector stretches into the first branch and is used for detecting the oil pressure in the first branch.

Further, the valve core assembly comprises a valve sleeve, a valve core and an elastic piece, wherein the valve sleeve is fixedly arranged in a valve cavity, a containing cavity which is communicated up and down is arranged in the valve sleeve, a valve port which is communicated with a communication port is arranged at the lower end of the containing cavity, a through hole which is communicated with the valve cavity is formed in the peripheral wall of the valve sleeve, the valve core is accommodated in the containing cavity, the valve core is used for blocking the valve port under the action of the elastic piece, a cavity which is communicated with a third branch is formed in the valve core, and a pressure dividing hole which is communicated with the cavity and the containing cavity is formed in the peripheral wall of the valve core.

Further, a connecting block is fixedly connected to the valve block, the switching valve is connected to the other end of the connecting block opposite to the valve block, the third branch comprises a third branch a arranged on the connecting block and a third branch b arranged on the valve block, one end of the third branch a is communicated with the cavity, the other end of the third branch a is communicated with the third branch b, the third branch b is communicated with the oil return port, and the switching valve is used for controlling the on-off of the third branch a.

Further, the elastic piece is accommodated in the cavity, the first end of the elastic piece is propped against the connecting block, and the second end of the elastic piece is propped against the inner end face of the cavity, so that the valve core has a tendency of moving towards one side of the plugging valve port under the action of the elastic piece.

Further, the hydraulic system further comprises a second oil pump, the oil tank, the second oil pump and the cooling device are connected in series to form a circulating oil way through a pipeline, hydraulic oil in the oil tank is pumped to the cooling device through the oil pump to be cooled, and the cooled hydraulic oil flows back to the oil tank through the pipeline.

Further, the load is an oil cylinder.

In summary, the utility model has the following beneficial effects:

in the hydraulic system, when the oil pump is in a standby state (when the oil pump is stopped), and in the oil return process of hydraulic oil in a load, due to the arrangement of the valve core assembly, when the oil return pressure of the valve core assembly is greater than or equal to the pressure value X Mpa of an elastic piece born by the valve core assembly, the hydraulic oil can sequentially pass through the oil outlet, the first branch, the valve cavity, the valve port, the communication port and the oil return port so as to realize oil return; when the oil return pressure is reduced to be slightly less than the pressure value X Mpa of the elastic piece that the valve core assembly receives, the valve core assembly closes the valve port under the elastic action of the elastic piece, simultaneously because the oil inlet is provided with the check valve, oil pressure in the load keeps slightly less than X Mpa, and then this hydraulic system has the function of pressurize, when the oil pump supplies oil, the hydraulic oil pressure directly rises to Y Mpa from X Mpa, and then has saved the time that overcomes the resilience force of elastic piece (has saved the hydraulic oil pressure and has risen to X Mpa in order to overcome the time that the resilience force of elastic piece from 0 Mpa), and then has promoted cutting off efficiency.

Drawings

Fig. 1 is a schematic view of the overall structure of the present utility model.

FIG. 2 is a schematic structural view of the hydraulic valve assembly of the present utility model.

Fig. 3 is a schematic view of the hydraulic valve assembly of the present utility model from a first perspective.

Fig. 4 is a schematic structural view of the hydraulic valve assembly of the present utility model from a second perspective.

In the figure: 1. an oil tank; 2. a first oil pump; 3. a hydraulic valve assembly; 31. a valve block; 311. an oil inlet; 312. an oil outlet; 313. an oil return port; 314. a valve cavity; 315. a first branch; 316. a second branch; 317. a third branch; 3171. a third branch b; 318. a communication port; 32. a valve core assembly; 321. a valve sleeve; 3211. a valve port; 3212. a through hole; 322. a valve core; 3221. a cavity; 3222. a partial pressure hole; 323. an elastic member; 33. a switching valve; 34. an overflow valve; 35. a one-way valve; 36. a pressure detector; 37. a connecting block; 371. a third branch a; 4. a cooling device; 5. and a second oil pump.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

As shown in fig. 1-4, embodiment one: the hydraulic system for controlling the rapid action of a load comprises an oil tank 1, a first oil pump 2, a hydraulic valve assembly 3 and a cooling device 4, wherein the hydraulic valve assembly 3 comprises a valve block 31, a valve core assembly 32 and a switching valve 33, the valve block 31 is provided with an oil inlet 311, an oil outlet 312, an oil return port 313, a valve cavity 314, a first branch 315, a second branch 316 and a third branch 317, the caliber of the oil inlet (311) is a millimeter, wherein 25 is more than or equal to 15, preferably, the a is equal to 20, the oil inlet 311 is provided with a one-way valve 35, the oil inlet 311 is sequentially connected with the first oil pump 2 and the oil tank 1 through pipelines, hydraulic oil in the oil tank 1 can be pumped to the oil inlet 311 of the valve block 31 through the first oil pump 2, the oil outlet 312 of the valve block 31 is connected with the load, further, the load is an executing element such as an oil cylinder, the oil return port 313 of the valve block 31 is connected with the oil tank 1 through pipelines, the oil inlet 311, the oil outlet 312 and the valve cavity 314 are mutually communicated through a first branch 315, namely the oil inlet 311 is communicated with the oil outlet 312 through the first branch 315, the oil inlet 311 is communicated with the valve cavity 314 through the first branch 315, the oil outlet 312 is also communicated with the valve cavity 314 through the first branch 315, the oil inlet 311 is communicated with the oil return port 313 through a second branch 316, the overflow valve 34 is arranged on the second branch 316, the valve cavity 314 is communicated with the oil return port 313 through a communication port 318, the valve core assembly 32 is arranged in the valve cavity 314, the valve cavity 314 is communicated with the oil return port 313 through the valve core assembly 32, the switching valve 33 is fixedly arranged on the valve block 31, the switching valve 317 is controlled through the switching valve 33, and the cooling device 4 is used for cooling hydraulic oil in the oil tank 1.

The valve core assembly 32 comprises a valve sleeve 321, a valve core 322 and an elastic piece 323, the valve sleeve 321 is fixedly arranged in the valve cavity 314, a cavity communicated up and down is arranged in the valve sleeve 321, a valve port 3211 communicated with the communication port 318 is arranged at the lower end of the cavity, a through hole 3212 communicated with the valve cavity 314 is arranged on the peripheral wall of the valve sleeve 321, the valve core 322 is accommodated in the cavity, the valve core 322 seals the valve port 3211 under the action of the elastic piece 323, a cavity 3221 communicated with the third branch 317 is arranged in the valve core 322, and a partial pressure hole 3222 communicated with the cavity 3221 and the cavity is formed in the peripheral wall of the valve core 322.

The valve block 31 is fixedly connected with a connecting block 37, the switching valve 33 is connected to the other end of the connecting block 37 opposite to the valve block 31, the third branch 317 comprises a third branch a371 arranged on the connecting block 37 and a third branch b3171 arranged on the valve block 31, one end of the third branch a371 is communicated with the cavity 3221, the other end of the third branch a371 is communicated with the third branch b3171, the third branch b3171 is communicated with the oil return port 313, the switching valve 33 is used for controlling on-off of the third branch a371, and through the arrangement of the connecting block 37, oil ways in the valve block 31 are reduced, and further processing of the valve block 31 is facilitated.

Further, the elastic member 323 is accommodated in the cavity 3221, a first end of the elastic member 323 is abutted against the connecting block 37, and a second end of the elastic member 323 is abutted against an inner end surface of the cavity 3221, so that the valve core 322 has a tendency to move towards one side of the plugging valve port 3211 under the action of the elastic member 323.

The working principle of the hydraulic system is as follows: when the oil pump is driven, hydraulic oil in the oil tank 1 is pumped to the oil inlet 311 of the valve block 31, and the hydraulic oil has the following flow direction: 1. part of the hydraulic oil flows to the load through the first branch 315 and the oil outlet 312; 2. when the switching valve 33 is opened, part of the hydraulic oil flows into the valve cavity 314 through the first branch 315 to overcome the elastic force of the elastic member 323 to jack up the valve core assembly 32 and open the valve port 3211, so that the hydraulic oil flowing into the valve cavity 314 flows into the oil return port 313 through the valve port 3211, and part of the hydraulic oil enters the oil return port 313 through the third branch 317; when the switching valve 33 is closed, the upper and lower ends of the valve core assembly 32 quickly form a pressure difference between upper and lower sides, and simultaneously, under the action of the elastic force of the elastic member 323, the valve core assembly 32 quickly resets to close the valve port 3211, and because the valve port 3211 is closed, hydraulic oil entering the first branch 315 completely enters the load through the oil outlet 312, so that the flow rate of the hydraulic oil flowing to the load is quickly increased, and further, the load action can be quickly controlled, so that the action process of the traditional pilot valve is not needed.

The valve block 31 is provided with a pressure detector 36, the pressure detector 36 extends into the first branch 315 to detect the oil pressure in the first branch 315 in real time, when the pressure detector 36 detects that the oil pressure in the first branch 315 is smaller than a set threshold value, the overflow valve 34 is in a closed state, so that the second branch 316 is in a blocking state, that is, the hydraulic oil cannot flow to the oil return port 313 through the second branch 316, when the pressure detector 36 detects that the pressure of the hydraulic oil in the first branch 315 exceeds a set threshold value, the overflow valve 34 is opened, and part of the hydraulic oil flows back to the oil return port 313 through the second branch 316, so that a protection effect can be achieved through the setting.

The hydraulic system further comprises a second oil pump 5, the oil tank 1, the second oil pump 5 and the cooling device 4 are connected in series to form a circulating oil way through a pipeline, hydraulic oil in the oil tank 1 is pumped to the cooling device 4 through the oil pump to be cooled, the cooled hydraulic oil flows back to the oil tank 1 through the pipeline, the hydraulic oil in the oil tank 1 is cooled through the cooling device 4, the cooling device 4 can be water-cooled or air-cooled, the cooling device 4 is in the prior art, and the utility model is not described in detail.

Embodiment two: the valve cavity 314 is provided with two groups of valve ports 3211 which are arranged in parallel on the valve block 31 and are in one-to-one correspondence with the valve cavity 314, the valve core assembly 32 is provided with two groups of valve ports 3211 which are arranged in the valve cavity 314, the oil outlet 312 is provided with two groups of valve ports which are arranged in parallel on the valve block 31, the two oil outlets 312 are communicated with the first branch 315, the two valve cavities 314 are respectively communicated with the third branch 317, the caliber of the oil inlet 311 is b mm, wherein b is more than or equal to 2.5 a and is more than or equal to 1.5a, and preferably b is equal to 35; through the arrangement, the flow rate of hydraulic oil flowing into the hydraulic valve can be increased, so that the hydraulic valve can be suitable for loads needing to act rapidly, and further the hydraulic system can be suitable for loads needing to act rapidly.

The adjacent ends of the two valve chambers 314 are disposed in communication, but, as an equivalent alternative, the two valve chambers 314 may be disposed in a mutually isolated configuration.

In the hydraulic system, when the oil pump is in a standby state (when the oil pump is stopped), the switching valve 33 is opened, and during the oil return process of hydraulic oil in a load, due to the arrangement of the valve core assembly 32, when the oil return pressure of the hydraulic oil is greater than or equal to the pressure value X Mpa of the elastic piece 323 borne by the valve core assembly 32, the hydraulic oil can sequentially pass through the oil outlet 312, the first branch 315, the valve cavity 314, the valve port 3211, the communication port 318 and the oil return port 313 so as to realize oil return; when the return oil pressure is reduced to be slightly less than the pressure value X Mpa of the elastic member 323 received by the valve core assembly 32, the valve core assembly 32 closes the valve port 3211 under the elastic force of the elastic member 323, meanwhile, as the oil inlet 311 is provided with the one-way valve 35, the oil pressure in the load is kept to be slightly less than X Mpa, so that the hydraulic system has the pressure maintaining function, when the oil pump supplies oil, the pressure of hydraulic oil is directly increased from X Mpa to Y Mpa (Y > X), so that the time required for overcoming the resilience force of the elastic member 323 is saved (the time required for increasing the pressure of the hydraulic oil from 0Mpa to X Mpa to overcome the resilience force of the elastic member 323 is saved), and the cutting efficiency is further improved.

The foregoing description is only of the preferred embodiments of the utility model, and all changes and modifications that come within the meaning and range of equivalency of the structures, features and principles of the utility model are therefore intended to be embraced therein.

Claims (10)

1. A hydraulic system for controlling the rapid action of a load, comprising: comprises an oil tank (1), a first oil pump (2), a hydraulic valve assembly (3) and a cooling device (4), wherein the hydraulic valve assembly (3) comprises a valve block (31), a valve core component (32) and a switching valve (33), the valve block (31) is provided with an oil inlet (311), an oil outlet (312), an oil return port (313), a valve cavity (314), a first branch (315), a second branch (316) and a third branch (317), the oil inlet (311) is provided with a one-way valve (35), the oil inlet (311) is sequentially connected with the first oil pump (2) and the oil tank (1) through pipelines, the oil outlet (312) is connected with a load, the oil return port (313) is connected with the oil tank (1) through pipelines, the oil inlet (311), the oil outlet (312) and the valve cavity (314) are mutually communicated through the first branch (315), the oil inlet (311) is communicated with the oil return port (313) through the second branch (316), the valve cavity (314) is communicated with the oil return port (313) through a communication port (318), the valve core component (32) is arranged in the valve cavity (314), the valve cavity (32) is controlled by the component (32) to be communicated with the valve cavity (314), the valve cavity (314) is communicated with the oil return port (313) through the third branch (317), the switching valve (33) is fixedly arranged on the valve block (31), the on-off of the third branch (317) is controlled through the switching valve (33), and the cooling device (4) is used for cooling hydraulic oil in the oil tank (1).

2. A hydraulic system for controlling the rapid action of a load as claimed in claim 1 wherein: the caliber of the oil inlet (311) is a millimeter, wherein a is more than or equal to 25 and more than or equal to 15.

3. A hydraulic system for controlling the rapid action of a load as claimed in claim 2, wherein: the valve cavity (314) is provided with two groups of valve openings (3211) which are arranged in parallel on the valve block (31) and are in one-to-one correspondence with the valve cavity (314), the valve core assembly (32) is provided with two groups of valve openings (3211) which are arranged in the valve cavity (314), the oil outlets (312) are provided with two groups of valve openings which are arranged in parallel on the valve block (31), the two oil outlets (312) are mutually communicated with the first branch (315), the two valve cavities (314) are respectively communicated with the third branch (317), and the caliber of the oil inlet (311) is b millimeters, wherein b is more than or equal to 2.5 a and is more than or equal to 1.5a.

4. A hydraulic system for controlling the rapid action of a load according to claim 3, wherein: adjacent ends of the two valve cavities (314) are communicated.

5. A hydraulic system for controlling the rapid action of a load as claimed in claim 1 wherein: the valve block (31) is provided with a pressure detector (36), and the pressure detector (36) stretches into the first branch (315) to detect the oil pressure in the first branch (315).

6. A hydraulic system for controlling the rapid action of a load as claimed in claim 1 wherein: the valve core assembly (32) comprises a valve sleeve (321), a valve core (322) and an elastic piece (323), the valve sleeve (321) is fixedly arranged in a valve cavity (314), a cavity communicated up and down is arranged in the valve sleeve (321), a valve port (3211) communicated with a communication port (318) is arranged at the lower end of the cavity, a through hole (3212) communicated with the valve cavity (314) is formed in the peripheral wall of the valve sleeve (321), the valve core (322) is accommodated in the cavity, the valve core (322) seals the valve port (3211) under the action of the elastic piece (323), a cavity (3221) communicated with a third branch (317) is formed in the valve core (322), and a communicating cavity (3221) and a partial pressure hole (3222) of the cavity are formed in the peripheral wall of the valve core (322).

7. A hydraulic system for controlling the rapid action of a load as recited in claim 6, wherein: the valve block (31) is fixedly connected with a connecting block (37), the switching valve (33) is connected to the other end of the connecting block (37) relative to the valve block (31), the third branch (317) comprises a third branch a (371) arranged on the connecting block (37) and a third branch b (3171) arranged on the valve block (31), one end of the third branch a (371) is communicated with the cavity (3221), the other end of the third branch a (371) is communicated with the third branch b (3171), the third branch b (3171) is communicated with the oil return opening (313), and the switching valve (33) is used for controlling the on-off of the third branch a (371).

8. A hydraulic system for controlling the rapid action of a load as recited in claim 7 wherein: the elastic piece (323) is accommodated in the cavity (3221), the first end of the elastic piece (323) is propped against the connecting block (37), and the second end of the elastic piece (323) is propped against the inner end surface of the cavity (3221), so that the valve core (322) has a trend of moving towards one side of the plugging valve port (3211) under the action of the elastic piece (323).

9. A hydraulic system for controlling the rapid action of a load according to any one of claims 1 to 8, wherein: the hydraulic system further comprises a second oil pump (5), the oil tank (1), the second oil pump (5) and the cooling device (4) are connected in series to form a circulating oil way through a pipeline, hydraulic oil in the oil tank (1) is pumped to the cooling device (4) through the oil pump to be cooled, and the cooled hydraulic oil flows back to the oil tank (1) through the pipeline.

10. A hydraulic system for controlling the rapid action of a load as claimed in claim 1 wherein: the load is an oil cylinder.

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