CN205036664U - Unloading valve - Google Patents
Unloading valve Download PDFInfo
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- CN205036664U CN205036664U CN201520770054.6U CN201520770054U CN205036664U CN 205036664 U CN205036664 U CN 205036664U CN 201520770054 U CN201520770054 U CN 201520770054U CN 205036664 U CN205036664 U CN 205036664U
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Abstract
The utility model discloses an unloading valve belongs to hydraulic control valve door technical field, has solved the technical problem that current unloading valve can only realize an oil circuit off -load, the utility model discloses an unloading valve, which comprises the following components: a valve body, case and the drive arrangement who is used for driving the case action, the case includes first case and second case, first case includes a main valve core and first guide's case, the second case includes the 2nd main valve core and second guide case, a main valve core is equipped with first guide's valve port, the 2nd main valve core is equipped with second guide valve port, be equipped with in the valve body by the first main valve mouth of a main valve core switching with by the second main valve mouth of the 2nd main valve core switching, first guide's case and the linkage of second guide case set up, drive arrangement first guide's case of drive and the linkage of second guide case, with the open -closed state who switches over first guide's valve port and second guide valve port. The embodiment of the utility model provides a mainly be applied to in the equipment that needs off -load in turn.
Description
[technical field]
The utility model relates to a kind of unloading valve, belongs to hydraulic control valve gate technology field.
[background technique]
Unloading valve is the valve that can make oil hydraulic pump off-load under certain condition.In the prior art, unloading valve is a two position two-way valve normally, can only realize the off-load of an oil circuit, when oil hydraulic pump needing two oil circuit off-loads, needs installation two unloading valves, and now cost increases; In addition, in some product, due to installing space closely and narrow and small and cannot realize installing two unloading valves simultaneously, make troubles to the use of user.
[model utility content]
Problem to be solved in the utility model is just to provide a kind of unloading valve, can realize the alternately off-load of two oil circuit.
For solving the problems of the technologies described above, the utility model adopts following technological scheme:
A kind of unloading valve, comprise valve body, spool and for driving the drive unit of spool action, described spool comprises the first spool and the second spool, described first spool comprises the first main valve plug and the first pilot valve, described second spool comprises the second main valve plug and the second pilot valve, described first main valve plug is provided with the first poppet port, described second main valve plug is provided with the second poppet port, be provided with by the first primary valve of the first main valve plug opening and closing and the second primary valve by the second main valve plug opening and closing in described valve body, first pilot valve and the interlock of the second pilot valve are arranged, described drive unit drives the first pilot valve and the interlock of the second pilot valve, to switch the open and-shut mode of the first poppet port and the second poppet port.
The spool of unloading valve of the present utility model comprises the first spool and the second spool, described first spool comprises the first main valve plug and the first pilot valve, described second spool comprises the second main valve plug and the second pilot valve, described first main valve plug is provided with the first poppet port, described second main valve plug is provided with the second poppet port, be provided with by the first primary valve of the first main valve plug opening and closing and the second primary valve by the second main valve plug opening and closing in valve body, unloading valve of the prior art only includes the first spool and the first primary valve, a corresponding oil circuit of valve port, therefore off-load and the pressurize of an oil circuit can only be realized in prior art by drive unit opening and closing first primary valve, the utility model increases the second spool and the second primary valve on the basis of existing technology, drive unit drives the first pilot valve and the interlock of the second pilot valve, to switch the open and-shut mode of the first poppet port and the second poppet port, when the first poppet port is closed and the second poppet port is opened, can open under the pressure effect of hydraulic oil according to known second primary valve of prior art, the off-load of the filler opening communicated with the second valve port is realized with this, the filler opening pressurize now communicated with the first valve port, when the second poppet port is closed and the first poppet port is opened, can open under the pressure effect of hydraulic oil according to known first primary valve of prior art, the off-load of the filler opening communicated with the first valve port is realized with this, the filler opening pressurize now communicated with the second valve port, compared to existing technologies, the utility model can realize the alternately off-load of two oil circuits with a unloading valve, simplify the design of oil circuit, reduce manufacture cost and energy consumption, Applicable scope is wider.
First specific embodiments: the sidewall of described valve body is provided with the first filler opening, the second filler opening and oil outlet, described oil outlet is between the first filler opening and the second filler opening, described first primary valve is between the first filler opening and oil outlet, and described second primary valve is between the second hydraulic fluid port and oil outlet.Design like this, the first valve port can make hydraulic oil flow to oil outlet from the first filler opening, realizes the off-load of the first filler opening, and the second valve port can make hydraulic oil flow to oil outlet from the second filler opening, realizes the off-load of the second filler opening.
Second specific embodiments: the sidewall of described first main valve plug is provided with the first damping hole communicated with the first filler opening, the aperture of described first damping hole is less than the aperture of the first primary valve, the sidewall of described first main valve plug is provided with the first shaft shoulder face, and described hydraulic oil acts on the first shaft shoulder face to make the first main valve plug motion open the first primary valve.First damping hole available buffer hydraulic oil is to the impact force of the first main valve plug sidewall, the aperture that the aperture of the first poppet port is greater than the first damping hole can make both sides inside and outside the first main valve plug produce pressure drop, pressure is acted on the first shaft shoulder face and drives the first main valve plug motion, make the first main valve plug open the first primary valve.
3rd specific embodiments: the sidewall of described second main valve plug is provided with the second damping hole communicated with the second filler opening, the aperture of described second damping hole is less than the aperture of the second primary valve, the sidewall of described second main valve plug is provided with the second shaft shoulder face, and described hydraulic oil acts on the second shaft shoulder face to make the second main valve plug motion open the second primary valve.Second damping hole available buffer hydraulic oil is to the impact force of the second main valve plug sidewall, the aperture that the aperture of the second poppet port is greater than the second damping hole can make both sides inside and outside the second main valve plug produce pressure drop, pressure is acted on the second shaft shoulder face and drives the second main valve plug motion, make the second main valve plug open the second primary valve.
4th specific embodiments: when described first pilot valve closes the first poppet port, described first pilot valve drives the first main valve plug motion to make the first main valve plug close the first primary valve; When described second pilot valve closes the second poppet port, described second pilot valve drives the second main valve plug motion to make the second main valve plug close the second primary valve.Design like this, when the first poppet port is closed, the first primary valve is also closed, and can realize the pressurize of the first filler opening; When the second poppet port is closed, the second primary valve is also closed, and can realize the pressurize of the second filler opening.
5th specific embodiments: drive unit comprises fixed core core, push rod, dynamic iron core core and Returnning spring, the push rod that one end of described first pilot valve or the second pilot valve extends to form, described fixed core be provided with through hole and communicate with through hole determine iron chamber, described push rod one end is passed through hole and is offseted with push rod, described fixed core moves iron core motion by electromagnetic attracting force, described dynamic iron core drives pushrod movement and drives push rod to move to close the first poppet port and the first primary valve, described reseting spring sleeve is contained on the push rod that is positioned at and determines iron chamber, described Returnning spring drives push rod motion to close the second poppet port and the second primary valve.It is little, lightweight, easy to maintenance that this drive unit has volume, and the switch motion time is shorter, uses convenient.
6th specific embodiments: be connected with connecting rod between described first pilot valve and the second pilot valve, described first pilot valve and connecting rod are threaded connection, and described second pilot valve is connected by straight pin with connecting rod.The split design that first pilot valve is connected by connecting rod with the second pilot valve, is convenient to the assembly and disassembly in later stage.
7th specific embodiments: described valve body is provided with screw plug away from one end of drive unit.Design like this, avoids hydraulic oil to leak to valve body outside.
8th specific embodiments: described first pilot valve or the second pilot valve are provided with breach near one end of screw plug.Because connecting rod is be threaded with the first pilot valve, during assembling, operator rotate the second pilot valve drivening rod synchronous axial system by being installed in breach by tool inserting, make connecting rod and the first pilot valve compact siro spinning technology.
These features of the present utility model and advantage will embodiment below, exposure detailed in accompanying drawing.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the utility model is described further:
Fig. 1 is unloading valve structural representation in the utility model preferred embodiment;
Fig. 2 is the partial enlarged drawing of A in Fig. 1;
Fig. 3 is the partial enlarged drawing of B in Fig. 1;
Fig. 4 is the structural representation of valve body in the utility model preferred embodiment.
[embodiment]
The technological scheme of accompanying drawing to the utility model embodiment below in conjunction with the utility model embodiment is explained and illustrated, but following embodiment is only preferred embodiment of the present utility model, and not all.Based on the embodiment in mode of execution, those skilled in the art under the prerequisite not making creative work obtain other embodiments, all belong to protection domain of the present utility model.
As shown in Figure 1, the unloading valve in the utility model preferred embodiment, comprise driving mechanism, valve body 2, first spool 3 and the second spool 4, driving mechanism is connected with valve body 2, and the first spool 3 and the second spool 4 are inserted on valve body 2.
Driving mechanism comprises nut 11, dynamic iron core 12, coil 13, fixed core 14, push rod 15, concentrating flux sleeve 16, pad 17, back-up ring 18 and Returnning spring 19, the dynamic lower end of iron core 12 and the upper end of push rod 15 offset, fixed core 14 is provided with through hole 140 and determines iron chamber 141, through hole 140 with determine iron chamber 141 and be communicated with, the lower end of push rod 15 is passed through hole 140 and is inserted to and determines in iron chamber 141, pad 17 is arranged between the upper end of valve body 2 and the lower end of fixed core 14, the upper end of valve body 2 and the lower end of concentrating flux sleeve 16 are threaded connection with by pad 17, fixed core 14, dynamic iron core 12 and push rod 15 are fitted in concentrating flux sleeve 16, nut 11 is socketed in the upper end of concentrating flux sleeve 16, coil 13 be positioned at nut 11 below and around the outside being arranged on concentrating flux sleeve 16.
As shown in Figure 2, first spool 3 comprises the first pilot valve 31 and the first main valve plug 32, first main valve plug 32 is provided with the first poppet port 320 and the first cavity 323, first pilot valve 31 is positioned at the first cavity 323, and the lower end of the first pilot valve 31 is through the first poppet port 320, first pilot valve 31 is for opening and closing first poppet port 320, the sidewall of the first main valve plug 32 is provided with the first shaft shoulder face 322 and the first damping hole 321 of annular, first damping hole 321 is between the first shaft shoulder face 322 and the first poppet port 320, the aperture of the first damping hole 321 is less than the aperture of the first poppet port 320.
As shown in Figure 3, second spool 4 comprises the second pilot valve 41 and the second main valve plug 42, second main valve plug 42 is provided with the second poppet port 420 and the second cavity 423, second pilot valve 41 is positioned at the second cavity 423, and the upper end of the second pilot valve 41 is through the second poppet port 420, the lower end of the second pilot valve 41 is provided with breach 413, second pilot valve 41 is for opening and closing second poppet port 420, the sidewall of the second main valve plug 42 is provided with the second shaft shoulder face 422 and the second damping hole 421 of annular, second damping hole 421 is between the second shaft shoulder face 422 and the second poppet port 420, the aperture of the second damping hole 421 is less than the aperture of the second poppet port 420.
First pilot valve 31 and the interlock of the second pilot valve 41 are arranged, described interlock setting refers to that the first pilot valve 31 or the second pilot valve 41 all can drive another pilot valve to move when drive unit drives, as Figure 2-3, connecting rod 5 is connected with between the first pilot valve 31 and the second pilot valve 41, the upper end of connecting rod 5 and the lower end of the first pilot valve 31 are threaded connection, the lower end of the lower end link 5 of connecting rod 5 is provided with axial blind hole, elastic cylindrical pin 51 and the radial direction through hole 50 communicated with axial blind hole, the upper end of the second pilot valve 41 is inserted in axial blind hole, straight pin 51 is inserted in radial direction through hole 50 the second pilot valve 41 and connecting rod 5 to be coupled together.
As shown in Figure 4, valve body 2 has valve pocket 25, on the sidewall of valve body 2, axial distribution has the first filler opening 20, oil outlet 21 and the second filler opening 22, oil outlet 21 is connected with fuel tank, oil outlet 21 is between the first filler opening 20 and the second filler opening 22, in valve pocket 25, be also provided with the first primary valve 23 and the second primary valve 24, first primary valve 23 between the first filler opening 20 and oil outlet 21, the second primary valve 24 is between oil outlet 21 and the second filler opening 22.
As shown in Figure 1, during assembling, first the first spool 3 is assembled in valve pocket 25 from one end of valve body 2, subsequently the connecting rod 5 assembled and the second spool 4 are assembled in valve pocket 25 from the other end of valve body 2, when connecting rod 5 is connected with the lower end of the first pilot valve 31, instrument is needed to put into breach 413, rotate the second pilot valve 41, connecting rod 5 and the second pilot valve 41 synchronous axial system are also tightened by screw thread and the first pilot valve 31, now the first main valve plug 32 is for opening and closing first primary valve 23, second main valve plug 42 is for opening and closing second primary valve 24, then the valve body 2 assembled is connected with concentrating flux sleeve 16, the upper end of the first pilot valve 31 extends to form push rod 311, the upper end of push rod 311 enters through pad 17 to determine in iron chamber 141 and to offset with push rod 15 coaxial cooperation, push rod 311 is positioned at the part of determining iron chamber 141 and is set with Returnning spring 19, the back-up ring 18 of E shape is also provided with in the upper end of push rod 311, Returnning spring 19 is compressed between back-up ring 18 and pad 17, in order to avoid the hydraulic oil in valve pocket 25 leaks to the outside of valve body 2, screw plug 28 is provided with in the lower end of valve body 2, screw plug 28 by hydraulic oil seal in valve pocket 25.
During normality, namely Returnning spring 19 drives push rod 311 to move up, first pilot valve 31 drives the second pilot valve 41 to move upward, now the first pilot valve 31 opens the first poppet port 320, second pilot valve 41 is closed the second poppet port 420, second pilot valve 41 and is driven the second main valve plug 42 to move upward and close the second primary valve 24; First damping hole 321 communicates with the first filler opening 20, the hydraulic oil entered by the first filler opening 20 enters in the first cavity 323 by the first damping hole 321, aperture due to the first poppet port 320 is greater than the aperture of the first damping hole 321, therefore inside and outside the first damping hole 321, both sides mineralization pressure is poor, now pressure acts on the first annular shaft shoulder face 322 and drives the first main valve plug 32 to move upward, first main valve plug 32 opens the first primary valve 23, hydraulic oil flows to oil outlet 21 and enters to fuel tank, makes the first filler opening 20 off-load; Because the second poppet port 420 and the second primary valve 24 are closed all, the hydraulic oil entered by the second filler opening 22 enters in the second cavity 423 through the second damping hole 421, the second main valve plug 42 and the second primary valve 24 to be compressed, thus keep the pressure of the second filler opening 22.
Coil 13 electric after, fixed core 14 generates an electromagnetic field and attracts dynamic iron core 12 to move down, dynamic iron core 12 promotes push rod 15 and moves down, push rod 311 moves down under the thrust of push rod 15, first pilot valve 31 drives the second pilot valve 41 to move downward, now the first pilot valve 31 is closed the first poppet port 320, first pilot valve 31 and is driven the first main valve plug 32 to move downward and close the first primary valve 23, second pilot valve 41 and open the second poppet port 420; Second damping hole 421 communicates with the second filler opening 22, the hydraulic oil entered by the second filler opening 22 enters in the second cavity 423 through the second damping hole 421, aperture due to the second poppet port 420 is greater than the aperture of the second damping hole 421, therefore inside and outside the second damping hole 421, both sides mineralization pressure is poor, now pressure act on annular the second shaft shoulder face 422 on and promote the second main valve plug 42 and move downward, the second main valve plug 42 is made to open the second primary valve 24, hydraulic oil flows to oil outlet 21 and enters fuel tank, makes the second filler opening 22 off-load; The hydraulic oil entered by the first filler opening 20 enters in the first cavity 323 through the first damping hole 321, the first main valve plug 32 and the first primary valve 23 to be compressed, thus keeps the pressure of the first filler opening 20.
In other embodiments of the present utility model, one end of second pilot valve extends to form push rod, push rod is positioned at determines iron chamber, drive unit drives the second pilot valve motion and the motion of the first pilot valve by driving push rod, complete the alternately pressurize of the first filler opening and the second filler opening, off-load, valve body is provided with screw plug near one end of the first spool, and breach is arranged on the first pilot valve one end near screw plug, its principle is identical with the utility model preferred embodiment, and this is no longer going to repeat them.
The above; be only embodiment of the present utility model; but protection domain of the present utility model is not limited thereto, is familiar with this those skilled in the art and should be understood that the content that the utility model includes but not limited to accompanying drawing and describes in embodiment above.Any amendment not departing from function and structure principle of the present utility model all will comprise within the scope of the appended claims.
Claims (9)
1. a unloading valve, comprise valve body, spool and for driving the drive unit of spool action, it is characterized in that: described spool comprises the first spool and the second spool, described first spool comprises the first main valve plug and the first pilot valve, described second spool comprises the second main valve plug and the second pilot valve, described first main valve plug is provided with the first poppet port, described second main valve plug is provided with the second poppet port, be provided with by the first primary valve of the first main valve plug opening and closing and the second primary valve by the second main valve plug opening and closing in described valve body, first pilot valve and the interlock of the second pilot valve are arranged, described drive unit drives the first pilot valve and the interlock of the second pilot valve, to switch the open and-shut mode of the first poppet port and the second poppet port.
2. a kind of unloading valve according to claim 1, it is characterized in that: the sidewall of described valve body is provided with the first filler opening, the second filler opening and oil outlet, described oil outlet is between the first filler opening and the second filler opening, described first primary valve is between the first filler opening and oil outlet, and described second primary valve is between the second hydraulic fluid port and oil outlet.
3. a kind of unloading valve according to claim 2, it is characterized in that: the sidewall of described first main valve plug is provided with the first damping hole communicated with the first filler opening, the aperture of described first damping hole is less than the aperture of the first primary valve, the sidewall of described first main valve plug is provided with the first shaft shoulder face, and described hydraulic oil acts on the first shaft shoulder face to make the first main valve plug motion open the first primary valve.
4. a kind of unloading valve according to claim 3, it is characterized in that: the sidewall of described second main valve plug is provided with the second damping hole communicated with the second filler opening, the aperture of described second damping hole is less than the aperture of the second primary valve, the sidewall of described second main valve plug is provided with the second shaft shoulder face, and described hydraulic oil acts on the second shaft shoulder face to make the second main valve plug motion open the second primary valve.
5. a kind of unloading valve according to claim 4, is characterized in that: when described first pilot valve closes the first poppet port, and described first pilot valve drives the first main valve plug motion to make the first main valve plug close the first primary valve; When described second pilot valve closes the second poppet port, described second pilot valve drives the second main valve plug motion to make the second main valve plug close the second primary valve.
6. a kind of unloading valve according to claim 5, it is characterized in that: drive unit comprises fixed core, push rod, dynamic iron core and Returnning spring, the push rod that one end of described first pilot valve or the second pilot valve extends to form, described fixed core be provided with through hole and communicate with through hole determine iron chamber, described push rod one end is passed through hole and is offseted with push rod, described fixed core moves iron core motion by electromagnetic attracting force, described dynamic iron core drives pushrod movement and drives push rod to move to close the first poppet port and the first primary valve, described reseting spring sleeve is contained in and is positioned on the push rod of cavity, described Returnning spring drives push rod motion to close the second poppet port and the second primary valve.
7. a kind of unloading valve according to claim 1, it is characterized in that: between described first pilot valve and the second pilot valve, be connected with connecting rod, described first pilot valve and connecting rod are threaded connection, and described second pilot valve is connected by straight pin with connecting rod.
8. a kind of unloading valve according to claim 1, is characterized in that: described valve body is provided with screw plug away from one end of drive unit.
9. a kind of unloading valve according to claim 8, is characterized in that: described first pilot valve or the second pilot valve are provided with breach near one end of screw plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520770054.6U CN205036664U (en) | 2015-09-30 | 2015-09-30 | Unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520770054.6U CN205036664U (en) | 2015-09-30 | 2015-09-30 | Unloading valve |
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| CN205036664U true CN205036664U (en) | 2016-02-17 |
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| CN201520770054.6U Active CN205036664U (en) | 2015-09-30 | 2015-09-30 | Unloading valve |
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| CN (1) | CN205036664U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631041A (en) * | 2017-11-08 | 2018-01-26 | 宁波文泽机电技术开发有限公司 | A kind of ratio one-way flow valves of double-direction control |
| CN107725879A (en) * | 2017-10-19 | 2018-02-23 | 宁波文泽机电技术开发有限公司 | A kind of normally closed ratio one-way flow valves |
| CN109863337A (en) * | 2016-11-01 | 2019-06-07 | 丹佛斯有限公司 | Method for the top cover of soft throttle valve body, soft throttle valve and the soft throttle valve of assembling |
| CN110513345A (en) * | 2019-09-04 | 2019-11-29 | 太原理工大学 | A kind of load memory valve |
-
2015
- 2015-09-30 CN CN201520770054.6U patent/CN205036664U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109863337A (en) * | 2016-11-01 | 2019-06-07 | 丹佛斯有限公司 | Method for the top cover of soft throttle valve body, soft throttle valve and the soft throttle valve of assembling |
| US11067191B2 (en) | 2016-11-01 | 2021-07-20 | Danfoss A/S | Top cover for a soft throttling valve body, soft throttling valve and method for assembling a soft throttling valve |
| CN107725879A (en) * | 2017-10-19 | 2018-02-23 | 宁波文泽机电技术开发有限公司 | A kind of normally closed ratio one-way flow valves |
| CN107725879B (en) * | 2017-10-19 | 2019-06-07 | 上海申花电工器材有限公司 | A kind of normally closed ratio one-way flow valves |
| CN107631041A (en) * | 2017-11-08 | 2018-01-26 | 宁波文泽机电技术开发有限公司 | A kind of ratio one-way flow valves of double-direction control |
| CN107631041B (en) * | 2017-11-08 | 2019-05-21 | 江苏华展石油机械有限公司 | A kind of ratio one-way flow valves of double-direction control |
| CN110513345A (en) * | 2019-09-04 | 2019-11-29 | 太原理工大学 | A kind of load memory valve |
| CN110513345B (en) * | 2019-09-04 | 2024-05-17 | 太原理工大学 | Load memory valve |
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Address after: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Huayi Precision Machinery Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG HUAYI PRECISION MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230829 Address after: 311800 Diankou Town Industrial Zone, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanshang Zhidi Technology Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: Zhejiang Huayi Precision Machinery Co.,Ltd. |