CN201786788U - Converging unloading overflow valve - Google Patents
Converging unloading overflow valve Download PDFInfo
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- CN201786788U CN201786788U CN2010202121309U CN201020212130U CN201786788U CN 201786788 U CN201786788 U CN 201786788U CN 2010202121309 U CN2010202121309 U CN 2010202121309U CN 201020212130 U CN201020212130 U CN 201020212130U CN 201786788 U CN201786788 U CN 201786788U
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- valve
- demand
- overflow
- spring
- selector
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Abstract
A converging unloading overflow valve comprises a pilot overflow valve, a selector valve, a demand valve, a first one-way valve, a second one-way valve and a valve body with an internal oil circuit, and is characterized in that the pilot overflow valve, the selector valve, the demand valve, the first one-way valve and the second one-way valve are combined onto the valve body with the internal oil circuit to form the converging unloading overflow valve serving multiple purposes. The converging unloading overflow valve has the advantages that a one-way valve in a bulldozer double-pump system, a converging one-way valve, the selector valve, the overflow valve and the demand valve are integrated, pipeline connection and leak points of discrete components are reduced, pressure loss is greatly reduced, optimal combination and control of pressure adjusting function, double-pump converging function, no-load unloading function and the like of a hydraulic system in a bulldozer working device are realized, and unnecessary power consumption is avoided as the selector valve selects pressure of the working device to carry out load feedback pressure regulation.
Description
Technical field
The utility model relates to the engineering machinery hydraulic valve, particularly relates to the interflow unloading overflow valve that is used for bulldozer hydraulic pressure.
Background technique
At present, the double pump hydraulic system has been widely used in equipment (perching knife, the loosen the soil) hydraulic system of high-power bulldozer.The pressure of two working pumps relies on two different latus rectum relief valves to be connected on each self-regulating of pump discharge place respectively, enters equipment after the commutation of process selector valve during work.Therefore, it is a lot of that the pressure of oil hydraulic pump will be higher than operating load, increased the power consumpiton of system; And interflow off-load and pressure regulation unit all are by discrete component, independently are installed in separately in the hydraulic system oil circuit, employing be the pipeline connection, therefore, it is many also to exist element, complex structure, the shortcoming that the pressure loss is big during work, leakage point is many, working oil temperature is higher.
The model utility content
The technical problems to be solved in the utility model provides a kind of adjustment of load feedback pressure, double pump interflow, unloaded unloading function and interflow unloading overflow valve that the system power utilization is abundant, structural principle is simple, the pressure loss is low of integrating in the high-volume hydraulic system.
The technological scheme that adopts is:
The interflow unloading overflow valve comprises precursor overflow valve, selector valve, demand valves, first one-way valve, second one-way valve and has the valve body of internal oil passages.Described precursor overflow valve, selector valve, demand valves, first one-way valve, second one-way valve are combined on the valve body that has internal oil passages, constitute the interflow unloading overflow valve of multi-purpose valve.
The first above-mentioned one-way valve is located in the valve body, comprises unidirectional valve seat, first nonreturn valve core, the first nonreturn valve core spring.Unidirectional valve seat is fixed on the valve body, and first nonreturn valve core is contained in the unidirectional valve seat, and the first nonreturn valve core spring is contained in first nonreturn valve core, and its external part withstands on the unidirectional valve seat.Second one-way valve comprises second nonreturn valve core, the second nonreturn valve core spring, one-way valve plug screw.The one-way valve plug screw is fixed on the valve body, and the second nonreturn valve core spring is contained in second nonreturn valve core, and its external part withstands on the one-way valve plug screw.
Above-mentioned demand valves comprises demand guiding valve, demand slide valve spring, demand valves end plate, demand valve seat.Demand valve seat and demand valves end plate are separately fixed at the valve body bi-side, and in establish the demand guiding valve, the demand slide valve spring is sleeved on demand guiding valve left end, demand slide valve spring two ends are replaced respectively on the spring platform of demand valve seat and demand guiding valve.
Above-mentioned precursor overflow valve comprises guide's overflow and selects valve body, regulator, throttle seat.Regulator and throttle seat are contained in guide's overflow and select in the valve body, and the conical surface body end of its regulator is contained in the set endoporus of throttle seat and connects each other.
Above-mentioned selector valve comprises the selector valve end plate, selects guiding valve, selects slide valve spring, selects spool, selector valve plug screw.Selector valve end plate and selector valve plug screw are separately fixed at guide's overflow and select the valve body opposite ends, select spool and select guiding valve to interconnect to be contained in guide's overflow and to select in the valve body, select slide valve spring to be sleeved on and select the guiding valve lower end, select the slide valve spring two ends to replace respectively on the spring platform of selector valve end plate and selection guiding valve.
The beneficial effects of the utility model are that the one-way valve in the set bulldozer double pump system, interflow one-way valve, selector valve, relief valve, demand valves reduce pipeline connection and leakage point between each discrete component in one, and the pressure loss is greatly reduced.The optimum organization and the control of the function such as pressure adjustment, double pump interflow, unloaded off-load in the bulldozer equipment hydraulic system have been realized; And carry out the adjustment of load feedback pressure by the pressure that selector valve is chosen equipment, stopped useless power consumpiton.
Description of drawings
Fig. 1 is an external form schematic representation of the present utility model.
Fig. 2 is that the K of Fig. 1 is to view.
Fig. 3 is the A-A sectional view of Fig. 2.
Fig. 4 is the B-B sectional view of Fig. 2.
Fig. 5 is the C-C sectional view of Fig. 4.
Fig. 6 is a hydraulic schematic diagram of the present utility model.
Embodiment
The interflow unloading overflow valve comprises precursor overflow valve 15, selector valve 21, demand valves 10, first one-way valve 2, second one-way valve 9 and has the valve body 1 of internal oil passages.Described precursor overflow valve 15, selector valve 21, demand valves 10, first one-way valve 2, second one-way valve 9 are combined on the valve body 1 that has internal oil passages, constitute the interflow unloading overflow valve of multi-purpose valve.Described first one-way valve 2 is located at (see figure 3) in the valve body 1, comprises unidirectional valve seat 3, first nonreturn valve core 5, the first nonreturn valve core spring 4.Unidirectional valve seat 3 is fixed on the valve body 1, and first nonreturn valve core 5 is contained in the unidirectional valve seat 3, and the first nonreturn valve core spring 4 is contained in first nonreturn valve core 5, and its external part withstands on the unidirectional valve seat 3.Be hydraulic oil interflow, and prevent that double pump from interfering with each other two oil hydraulic pumps.Second one-way valve 9 is located at (see figure 3) in the valve body 1, comprises second nonreturn valve core 6, the second nonreturn valve core spring 7, one-way valve plug screw 8.One-way valve plug screw 8 is fixed on the valve body 1, and the second nonreturn valve core spring 7 is contained in second nonreturn valve core 6, and its external part withstands on the one-way valve plug screw 8, is that anti-locking system produces shake impact, high pressure oil refluence damage oil hydraulic pump.Described demand valves 10 is located at (see figure 4) in the valve body 1, comprises demand guiding valve 12, demand slide valve spring 13, demand valves end plate 11, demand valve seat 14.Demand valve seat 14 and demand valves end plate 11 are separately fixed on valve body 1 bi-side, and in establish demand guiding valve 12, demand slide valve spring 13 is sleeved on demand guiding valve 12 left ends, and demand slide valve spring 13 two ends are replaced respectively on the spring platform of demand valve seat 14 and demand guiding valve 12.Described precursor overflow valve 15 (see figure 5)s comprise precursor overflow valve and select valve body 20, regulator 16, throttle seat 17.Regulator 16 and throttle seat 17 are contained in guide's overflow and select in the valve body 20, and the conical surface end of its regulator 16 is contained in the set endoporus of throttle seat 17 and connects each other.Described selector valve 21 (see figure 5)s comprise selector valve end plate 18, select guiding valve 22, select slide valve spring 19, select spool 23, selector valve plug screw 24.Selector valve end plate 18 and selector valve plug screw 24 are separately fixed at guide's overflow and select valve body 20 opposite ends, select spool 23 and select guiding valve 22 to interconnect to be contained in guide's overflow and to select in the valve body 20, select slide valve spring 19 to be sleeved on and select guiding valve 22 lower ends, select slide valve spring 19 two ends to replace respectively on the spring platform of selector valve end plate 18 and selection guiding valve 22.Described precursor overflow valve 15 and selector valve 21 are fixed by bolts on the valve body 1 that has internal oil passages with selecting valve body 20 by guide's overflow.
Working principle
In Fig. 6 hydraulic schematic diagram, pressure oil enters from P1, P2, and P1 one tunnel to the perching knife selector valve, enters the right-hand member of demand valves 10 and demand valves through second one-way valve 9 simultaneously; P2 one tunnel collaborates with P1 through first one-way valve 2, and enters demand valves simultaneously; The guide oil that PM or PL come is connected to the demand valves left end, simultaneously by precursor overflow valve 15 set pressures.
In bulldozer equipment hydraulic system, interflow unloading overflow valve and operating valve (perching knife valve) as an integral installation between oil hydraulic pump and actuating device (perching knife, ridge buster).The hydraulic oil that comes from two oil hydraulic pumps enters valve body 1 (see figure 3) from P1 mouth, P2 mouth respectively, after the power that the P2 mouth overcomes the first nonreturn valve core spring 4 is opened first nonreturn valve core 5, with the hydraulic oil interflow that the P1 mouth comes, the hydraulic oil behind the interflow is opened second nonreturn valve core 6 after overcoming the power of the second nonreturn valve core spring 7.Entering perching knife selector valve P confession then uses to actuating device; Simultaneously, P1 mouth pressure oil radial port b on guiding valve 12 enters right (b1) two ends, a left side (b2) (see figure 4) of guiding valve 12 simultaneously, and the area of b1 end is greater than the area of b2 end.When equipment (perching knife, loosen the soil) attonity, then PM and PL mouth do not have pressure, the power pusher movable pulley 12 that hydraulic oil behind P1 mouth and the P2 mouth interflow overcomes spring 13 moves to the left, until the left side of guiding valve 12 with till valve seat 14 contacts, P1 mouth and T mouth are connected, the P2 mouth is also connected with the T mouth, makes system reach the function of unloaded off-load.
When spade blade device was worked, PM pressure oil was taken from the actuator port of perching knife valve and identical with its pressure, and after this pilot pressure oil introduced valve body 20 (see figure 5)s, entered the c chamber, entered the b chamber through throttle seat 17 then.The pressure oil one tunnel in b chamber enters a chamber from the a1 oil circuit, promotes guiding valve 12 and moves right, and with till plate 11 contacts, P1 mouth and T mouth are closed until the right side of guiding valve 12, and the P2 mouth is also closed with the T mouth, P1, the rising of P2 mouth pressure; Another road of the pressure oil in b chamber enters regulator 16, can adjust the b chamber pressure in demand valves a chamber just by regulator 16, during the demand valves pressure regulation P1, P2 mouth through guiding valve 12 directly to T mouth oil sump tank, make the setting of the pressure stability of P1, P2 mouth at regulator 16, hydraulic oil after the regulator 16 pressure regulation overflows is through T1, T2, T3 to T mouth oil sump tank, like this, just reached the function of utilizing the load feedback principle to adjust the pressure of P1, P2 mouth, the pressure and the load of P1, P2 mouth (double pump) are consistent.
When loosening the soil device work, PL pressure oil is taken from the actuator port of the valve that loosens the soil and identical with its pressure, and with behind this pilot pressure oil introducing valve body 20, promote spool 23 and move up, guiding valve 22 is moved down, until the lower end surface of guiding valve 22 with till plate 18 contacts, the path in PM mouth and c chamber is closed, the PL mouth communicates with the c chamber simultaneously, and pilot pressure oil enters the c chamber, finishes the function that load feedback is adjusted pressure equally.
Claims (5)
1. interflow unloading overflow valve, comprise precursor overflow valve (15), selector valve (21), demand valves (10), first one-way valve (2), second one-way valve (9) and have the valve body (1) of internal oil passages, it is characterized in that described precursor overflow valve (15), selector valve (21), demand valves (10), first one-way valve (2), second one-way valve (9) are combined on the valve body (1) that has internal oil passages, constitute the interflow unloading overflow valve of multi-purpose valve.
2. interflow according to claim 1 unloading overflow valve, it is characterized in that described first one-way valve (2) is located in the valve body (1), comprise unidirectional valve seat (3), first nonreturn valve core (5), the first nonreturn valve core spring (4), unidirectional valve seat (3) is fixed on the valve body (1), first nonreturn valve core (5) is contained in the unidirectional valve seat (3), the first nonreturn valve core spring (4) is contained in first nonreturn valve core (5), and its external part withstands on the unidirectional valve seat (3); Second one-way valve (9) is located in the valve body (1), comprise second nonreturn valve core (6), second nonreturn valve core (7), one-way valve plug screw (8), one-way valve plug screw (8) is fixed on the valve body (1), the second nonreturn valve core spring (7) is contained in second nonreturn valve core (6), and its external part withstands on the one-way valve plug screw (8).
3. interflow according to claim 1 unloading overflow valve, it is characterized in that described demand valves (10) is located in the valve body (1), comprise demand guiding valve (12), demand slide valve spring (13), demand valves end plate (11), demand valve seat (14), demand valve seat (14) and demand valves end plate (11) are separately fixed on valve body (1) bi-side, and in establish demand guiding valve (12), demand slide valve spring (13) is sleeved on demand guiding valve (12) left end, and demand slide valve spring (13) two ends are replaced respectively on the spring platform of demand valve seat (14) and demand guiding valve (12).
4. interflow according to claim 1 unloading overflow valve, it is characterized in that described precursor overflow valve (15), comprise precursor overflow valve and select valve body (20), regulator (16), throttle seat (17), be connected each other in the set endoporus of regulator (16) and throttle seat (17).
5. interflow according to claim 1 unloading overflow valve, it is characterized in that described selector valve (21), comprise selector valve end plate (18), select guiding valve (22), select slide valve spring (19), select spool (23), selector valve plug screw (24), selector valve end plate (18) and selector valve plug screw (24) are separately fixed at guide's overflow and select valve body (20) opposite ends, select spool (23), selecting guiding valve (22) to interconnect is contained in guide's overflow and selects in the valve body (20), select slide valve spring (19) to be sleeved on and select guiding valve (22) lower end, select slide valve spring (19) two ends to replace respectively on the spring platform of selector valve end plate (18) and selection guiding valve (22); Described precursor overflow valve (15) and selector valve (21) are fixed by bolts on the valve body (1) that has internal oil passages with selecting valve body (20) by guide's overflow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202121309U CN201786788U (en) | 2010-06-02 | 2010-06-02 | Converging unloading overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202121309U CN201786788U (en) | 2010-06-02 | 2010-06-02 | Converging unloading overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201786788U true CN201786788U (en) | 2011-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202121309U Expired - Fee Related CN201786788U (en) | 2010-06-02 | 2010-06-02 | Converging unloading overflow valve |
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| Country | Link |
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| CN (1) | CN201786788U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748334A (en) * | 2012-03-12 | 2012-10-24 | 广西柳工机械股份有限公司 | Converging unloading valve |
| CN103438248A (en) * | 2013-08-30 | 2013-12-11 | 合肥长源液压股份有限公司 | Sheet-type multi-way valve |
| CN114109947A (en) * | 2021-10-25 | 2022-03-01 | 保定优佰协力电子科技有限公司 | Mining confluence valve |
-
2010
- 2010-06-02 CN CN2010202121309U patent/CN201786788U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748334A (en) * | 2012-03-12 | 2012-10-24 | 广西柳工机械股份有限公司 | Converging unloading valve |
| CN102748334B (en) * | 2012-03-12 | 2014-12-31 | 广西柳工机械股份有限公司 | Converging unloading valve |
| CN103438248A (en) * | 2013-08-30 | 2013-12-11 | 合肥长源液压股份有限公司 | Sheet-type multi-way valve |
| CN114109947A (en) * | 2021-10-25 | 2022-03-01 | 保定优佰协力电子科技有限公司 | Mining confluence valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110406 Termination date: 20150602 |
|
| EXPY | Termination of patent right or utility model |