CN204226321U - A kind of secondary loads control valve relief function being integrated in pilot valve - Google Patents
A kind of secondary loads control valve relief function being integrated in pilot valve Download PDFInfo
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- CN204226321U CN204226321U CN201420650585.7U CN201420650585U CN204226321U CN 204226321 U CN204226321 U CN 204226321U CN 201420650585 U CN201420650585 U CN 201420650585U CN 204226321 U CN204226321 U CN 204226321U
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- 238000013016 damping Methods 0.000 claims abstract description 12
- 230000015572 biosynthetic process Effects 0.000 claims description 14
- 239000003921 oil Substances 0.000 description 17
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 3
- 238000010587 phase diagram Methods 0.000 description 3
- FGRBYDKOBBBPOI-UHFFFAOYSA-N 10,10-dioxo-2-[4-(N-phenylanilino)phenyl]thioxanthen-9-one Chemical compound O=C1c2ccccc2S(=O)(=O)c2ccc(cc12)-c1ccc(cc1)N(c1ccccc1)c1ccccc1 FGRBYDKOBBBPOI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses a kind of secondary loads control valve relief function being integrated in pilot valve.Comprise left end cap, control piston, damping plug, control spring, valve body, push rod, main valve housing, main valve plug, main valve plug spring, guide's valve seat, pilot valve, pilot valve spring and right end cap.This secondary loads control valve inside defines the second draining chamber, sensitive cavity, load cavity, oil back chamber, the first draining chamber and control chamber.For existing in the hydraulic system of Exceed load, this secondary loads control valve can control the flow flowed out from hydraulic actuator, thus control load lowering velocity; Owing to being integrated in pilot valve by relief function, make the number of components of this secondary loads control valve less, compact structure, good reliability.
Description
Technical field
The utility model relates to hydraulic control component, especially relates to a kind of secondary loads control valve relief function being integrated in pilot valve.
Background technique
In industrial hydraulic and vibration hydraulic system application, often can occur the situation that load force direction is identical with load movement direction, this load is called as Exceed load (negative load).Bear the hydraulic system of Exceed load, need custom-designed hydrovalve to control the flow of the hydraulic oil from load flow oil return source, this type of control valve is commonly referred to as load control valve or equilibrium valve.Load control valve, when flow is larger, generally adopts the secondary structure of pilot valve-main valve plug.And in order to protect hydraulic actuator not damaged by high pressure, load control valve also often needs to possess relief function.
But, owing to not only needing to possess the function of control load flow but also needing to possess relief function, tradition secondary loads control valve generally adopts the spool having designed control load traffic engineering capability respectively and the spool completing relief function, so the secondary loads control valve that tradition has relief function generally needs three spools, therefore cause that whole load control valve part is more, complex structure, volume are larger.
In view of this, application new principle, new method, the Novel two-stage load control valve developed on spool relief function being integrated in control load traffic engineering capability has important engineering significance.
Model utility content
In order to overcome in background technique, the part be present in traditional secondary loads control valve is many, complex structure, bulky deficiency, the purpose of this utility model is to provide a kind of secondary loads control valve relief function being integrated in pilot valve, the relief function completed by an independent spool in conventional load control valve is integrated in pilot valve by this valve, thus makes that this valve arrangement is simple, compact, reliability is high.
The technical solution adopted in the utility model is:
The utility model comprises left end cap, control piston, damping plug, control spring, valve body, push rod, main valve housing, main valve plug, main valve plug spring, guide's valve seat, pilot valve, pilot valve spring and right end cap; Control piston is placed in the cylindrical hole of valve body left end, and its large end and valve body are formed and be slidably matched, and the small end of control piston is through valve inner aperture, and its small end and valve inner keyhole formation are slidably matched; The cylindrical hole of control piston and valve body left end surrounds formation first draining chamber; Control spring is positioned at the first draining chamber, and one end of control spring withstands on bottom the cylindrical hole of valve body left end, and the other end of control spring withstands on control piston shoulder, and left end cap is arranged on valve body left side by bolt, and pushes down the large end of control piston; Damping plug is arranged in the large end internal holes of control piston by screw thread; The large end concave surface of control piston, valve body left end cylindrical hole and left end cap coordinate formation control chamber jointly, and the center of left end cap is provided with and controls mouth X mouth, control mouth X mouth and are communicated with control chamber; Main valve housing is installed in the right-hand member cylindrical hole of valve body, load cavity is formed bottom main valve housing and between valve body right-hand member cylindrical hole, main valve plug is installed in main valve housing, and main valve plug and main valve housing are formed and be slidably matched, in the middle part of valve body cylindrical hole outside end large with main valve plug and main valve housing coordinate and form oil back chamber; Guide's valve seat is installed in valve body right-hand member cylindrical hole, and the large end of main valve housing is withstood in one end of guide's valve seat, and the other end of guide's valve seat is withstood by right end cap, and right end cap is installed on valve body right-hand member, and main valve housing, main valve plug and guide's valve seat surround formation sensitive cavity jointly; Push rod and main valve plug small end keyhole formation are slidably matched, and one end of push rod is arranged in load cavity and withstands control piston small end, and the other end of push rod is arranged in sensitive cavity and withstands the small end of pilot valve; Main valve plug spring is positioned at sensitive cavity, and main valve plug spring one end withstands on the bottom of main valve plug inner circular post holes, and the other end of main valve plug spring withstands on the end face of guide's valve seat; Right end cap is connected on valve body, and the left part cylndrical surface of right end cap coordinates with valve body right-hand member cylindrical hole and withstands on the end face of guide's valve seat; Guide's valve seat and right end cap surround formation second draining chamber jointly; Pilot valve small end is also formed through guide's valve seat end orifices and is slidably matched, and the small end of pilot valve is arranged in sensitive cavity, and the large end of pilot valve is arranged in the second draining chamber; Pilot valve spring is arranged in the second draining chamber, and one end of pilot valve spring withstands on the large end stand shoulder of pilot valve, and the other end of pilot valve spring withstands on bottom the inner circular post holes of right end cap; Valve body is provided with return opening A mouth and is communicated with oil back chamber; Valve body is provided with load port B mouth and is communicated with load cavity; Valve body is provided with the first drain tap L1 mouth and is communicated with the first draining chamber; Valve body is provided with the second drain tap L2 mouth and is communicated with the second draining chamber; Control chamber is communicated with the first draining chamber by damping plug inner aperture; Oil back chamber is communicated with load cavity by valve port in the middle part of main valve plug; Sensitive cavity is communicated with load cavity by the valve port in the middle part of push rod; Sensitive cavity is communicated with the second draining chamber by the valve port of pilot valve small end.
During original position, described load cavity is communicated with sensitive cavity by valve port in the middle part of push rod, and described load cavity pressure directly acts in pilot valve.
Described pilot valve and described main valve plug coaxially, are in the same way arranged; Push rod two ends are withstood by the small end of control piston small end and pilot valve respectively.
The beneficial effect that the utility model has is:
For existing in the hydraulic system of Exceed load, this secondary loads control valve can control the flow flowed out from hydraulic actuator, thus control load lowering velocity; Owing to being integrated in pilot valve by relief function, make the number of components of this secondary loads control valve less, compact structure, good reliability.
Accompanying drawing explanation
Fig. 1 is structural principle schematic diagram of the present utility model.
Fig. 2 is the sectional drawing of A-A in Fig. 1.
Fig. 3 is the partial enlarged view of B in Fig. 1.
Fig. 4 is the load phase diagram that secondary loads control valve is unidirectional when rising when opening.
Phase diagram when secondary loads control valve guide opens when Fig. 5 is load decline.
Fig. 6 is the phase diagram of secondary loads control valve overflow when opening.
In figure: 1, left end cap, 2, control piston, 3, damping plug, 4, control spring, 5, valve body, 6, push rod, 7, main valve housing, 8, main valve plug, 9, main valve plug spring, 10, guide's valve seat, 11, pilot valve, 12, pilot valve spring, 13, right end cap, 14, the second draining chamber, 15, sensitive cavity, 16, oil back chamber, 17, load cavity, the 18, first draining chamber, 19, control chamber.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises left end cap 1, control piston 2, damping plug 3, control spring 4, valve body 5, push rod 6, main valve housing 7, main valve plug 8, main valve plug spring 9, guide's valve seat 10, pilot valve 11, pilot valve spring 12 and right end cap 13.
Control piston 2 is placed in the cylindrical hole of valve body 5 left end, and its large end and valve body 5 are formed and be slidably matched, and the small end of control piston 2 is through valve body 5 inner aperture, and its small end and valve body 5 inner aperture are formed and be slidably matched; Control piston 2 surrounds formation first draining chamber 18 with the cylindrical hole of valve body 5 left end; Control spring 4 is positioned at the first draining chamber 18, one end of control spring 4 withstands on bottom the cylindrical hole of valve body 5 left end, the other end of control spring 4 withstands on control piston 2 shoulder, and left end cap 1 is arranged on valve body 5 left side by bolt, and pushes down the large end of control piston 2; Damping plug 3 is arranged on control piston 2 by screw thread and holds greatly in internal holes; Control piston 2 holds greatly concave surface, valve body 5 left end cylindrical hole and left end cap 1 jointly to coordinate formation control chamber 19, and the center of left end cap 1 is provided with and controls mouth X mouth, controls mouth X mouth and is communicated with control chamber 19; Main valve housing 7 is installed in the right-hand member cylindrical hole of valve body 5, load cavity 17 is formed bottom main valve housing 7 and between valve body 5 right-hand member cylindrical hole, main valve plug 8 is installed in main valve housing 7, main valve plug 8 and main valve housing 7 are formed and are slidably matched, and hold greatly outside and main valve housing 7 to coordinate form oil back chamber 16 in the middle part of valve body 5 cylindrical hole with main valve plug 8; Guide's valve seat 10 is installed in valve body 5 right-hand member cylindrical hole, the large end of main valve housing 7 is withstood in one end of guide's valve seat 10, the other end of guide's valve seat 10 is withstood by right end cap 13, right end cap 13 bolt is installed on valve body 5 right-hand member, and main valve housing 7, main valve plug 8 and guide's valve seat 10 jointly surround and form sensitive cavity 15; Push rod 6 and main valve plug 8 small end keyhole formation are slidably matched, and one end of push rod 6 is arranged in load cavity 17 and withstands control piston small end, and the other end of push rod 6 is arranged in sensitive cavity 15 and withstands the small end of pilot valve 11; Main valve plug spring 9 is positioned at sensitive cavity 15, and main valve plug spring 9 one end withstands on the bottom of main valve plug 8 inner circular post holes, and the other end of main valve plug spring 9 withstands on the end face of guide's valve seat 10; Right end cap 13 is bolted on valve body 5, and the left part cylndrical surface of right end cap 13 coordinates with valve body 5 right-hand member cylindrical hole and withstands on the end face of guide's valve seat 10; Guide's valve seat 10 and right end cap 13 surround formation second draining chamber 14 jointly; Pilot valve 11 small end is also formed through guide's valve seat 10 end orifices and is slidably matched, and the small end of pilot valve 11 is arranged in sensitive cavity 14, and the large end of pilot valve 11 is arranged in the second draining chamber 14; Pilot valve spring 12 is arranged in the second draining chamber 14, and one end of pilot valve spring 12 withstands on the large end stand shoulder of pilot valve 11, and the other end of pilot valve spring 12 withstands on bottom the inner circular post holes of right end cap 13.
Valve body 5 is provided with return opening A mouth and is communicated with oil back chamber 16; Valve body 5 is provided with load port B mouth and is communicated with load cavity 17; Valve body 5 is provided with the first drain tap L1 mouth and is communicated with the first draining chamber 18; Valve body 5 is provided with the second drain tap L2 mouth and is communicated with the second draining chamber 14; Control chamber 19 is communicated with the first draining chamber 18 by damping plug 3 inner aperture; Oil back chamber 16 is communicated with load cavity 17 by valve port in the middle part of main valve plug 8; Sensitive cavity 15 is communicated with load cavity 17 by the valve port in the middle part of push rod 6; Sensitive cavity 15 is communicated with the second draining chamber 14 by the valve port of pilot valve 11 small end.
During original position, load cavity 17 is communicated with sensitive cavity 15 by valve port in the middle part of push rod 6, and load cavity 17 pressure directly acts in pilot valve 11.
Pilot valve 11 and main valve plug 8 coaxially, are in the same way arranged; Columned push rod 6 is formed with main valve plug 8 and is slidably matched, and push rod 6 two ends are withstood by the small end of control piston 2 and pilot valve 11 respectively.
As shown in Figure 1, the secondary loads control valve that relief function is integrated in pilot valve by the utility model mainly comprises control piston assembly, main valve plug assembly, pilot valve assembly and valve component.Control piston assembly is made up of control piston 2, damping plug 3 and control spring 4, control piston is placed in valve body 5 cylindrical hole and can moves vertically wherein, control spring one end is withstood bottom valve body cylindrical hole, the other end to be enclosed within control piston and to withstand control piston, wherein control piston right part is the first draining chamber 18, first draining chamber secondary loads control valve first drain tap L1 mouth communicates, and control piston left part is control chamber 19, and control chamber and secondary loads control valve control mouth X mouth and communicate; Main valve plug assembly comprises main valve plug 8, main valve housing 7 and main valve plug spring 9 and push rod 6, main valve plug is placed in main valve housing, and can move vertically in main valve housing, push rod is placed in main valve plug, and can move vertically in main valve plug, main valve plug spring 9 one end withstands on the bottom of main valve plug endoporus, wherein main valve plug left part is load cavity 17, load cavity communicates with secondary loads control valve load port B mouth, in the middle part of main valve plug, outside is oil back chamber 16, oil back chamber communicates with secondary loads control valve return opening A mouth, and main valve plug right part cavity volume is sensitive cavity 15; Pilot valve assembly is made up of pilot valve 11, guide's valve seat 10 and pilot valve spring 12, pilot valve is placed in guide's valve seat, and can move vertically in first guide valve seat, pilot valve spring one end is enclosed within pilot valve afterbody ladder place, and withstand its convex shoulder, wherein guide's valve seat left part cavity volume is sensitive cavity 15, and guide's valve seat inside is the second draining chamber 14; Valve component is made up of valve body 5, left end cap 1 and right end cap 13, and valve body is connected by 4 interior hexagonal cylindrical hook bolts with left end cap, and valve body is connected by 4 interior hexagonal cylindrical hook bolts with right end cap.
Fig. 2 shows load control valve return opening A mouth and is communicated with situation by the radial hole of main valve housing 7 and oil back chamber 16.
When Fig. 3 shows original position, the situation that load cavity 17 is communicated with sensitive cavity 15 by valve port in the middle part of push rod 6.
When Figure 4 shows that load is risen, load control valve is as state during one-way valve opens, now hydraulic oil enters the oil back chamber 16 of secondary loads control valve from A mouth, promotion main valve plug 8 compresses main valve plug spring 9 and moves to pilot valve 11 direction, valve port is opened, and hydraulic oil enters load cavity 17 through valve port, and then flows out from B mouth, now, pilot valve 11, control piston 2, that push rod 6 is in original position is motionless.
When Figure 5 shows that load declines, state when load control valve guide opens.When not controlling oil and entering from control mouth X, the high pressure liquid force feed entered from B mouth enters sensitive cavity 15 through load cavity 17 from valve port in the middle part of push rod 6, make sensitive cavity 15 pressure identical with load cavity 14 pressure, now hydraulic oil suffered by main valve plug makes a concerted effort to make main valve plug 8 withstand main valve housing left and close.And when there being control oil to enter control chamber 19 from control mouth X, control oil promotion control piston 2 compression control spring 4 to move to main valve plug 8 direction, under the promotion of control piston 2, push rod 6 and pilot valve 11 move to right end cap 13 direction, poppet port between pilot valve 11 and guide's valve seat 10 is opened, link up sensitive cavity 15 and the second draining chamber 14, sensitive cavity 15 pressure reduces, main valve plug 8 stress balance is broken, main valve plug 8 moves to pilot valve 11 direction, primary valve is opened, the hydraulic oil of B mouth is by load cavity 17, primary valve enters oil back chamber 16, and then flow out from secondary loads control valve A mouth, the movement of main valve plug 3 makes valve port in the middle part of push rod 6 open greatly, the hydraulic oil of load cavity 17 is made to enter sensitive cavity 15, the pressure of sensitive cavity 15 raises, main valve plug 8 regains stress balance, thus make main valve plug be parked in certain position, primary valve remains on certain openings of sizes.
Figure 6 shows that the situation when overflow of secondary loads control valve is opened, control mouth X mouth is entered when not controlling oil, and the hydraulic fluid pressure entered from load port B mouth too high time, hydraulic oil in load cavity 17 directly enters sensitive cavity 15 by valve port in the middle part of push rod 6, and directly promote pilot valve 11 and compress pilot valve spring 12 and move to right end cap 13 direction, poppet port between pilot valve 11 and guide's valve seat 10 is opened, link up sensitive cavity 15 and the second draining chamber 14, hydraulic oil so from second drain tap L2 mouth flow out, realize relief function, thus successfully relief function has been integrated in pilot valve 11.
Claims (3)
1. relief function is integrated in a secondary loads control valve for pilot valve, it is characterized in that: comprise left end cap (1), control piston (2), damping plug (3), control spring (4), valve body (5), push rod (6), main valve housing (7), main valve plug (8), main valve plug spring (9), guide's valve seat (10), pilot valve (11), pilot valve spring (12) and right end cap (13); Control piston (2) is placed in the cylindrical hole of valve body (5) left end, and its large end and valve body (5) are formed and be slidably matched, and the small end of control piston (2) is through valve body (5) inner aperture, and its small end and valve body (5) inner aperture are formed and be slidably matched; Control piston (2) surrounds formation first draining chamber (18) with the cylindrical hole of valve body (5) left end; Control spring (4) is positioned at the first draining chamber (18), one end of control spring (4) withstands on bottom the cylindrical hole of valve body (5) left end, the other end of control spring (4) withstands on control piston (2) shoulder, left end cap (1) is arranged on valve body (5) left side by bolt, and pushes down the large end of control piston (2); Damping plug (3) is arranged on control piston (2) by screw thread and holds greatly in internal holes; Control piston (2) holds greatly concave surface, valve body (5) left end cylindrical hole and left end cap (1) jointly to coordinate formation control chamber (19), and the center of left end cap (1) is provided with and controls mouth X mouth, controls mouth X mouth and is communicated with control chamber (19); Main valve housing (7) is installed in the right-hand member cylindrical hole of valve body (5), load cavity (17) is formed between main valve housing (7) bottom and valve body (5) right-hand member cylindrical hole, main valve plug (8) is installed in main valve housing (7), main valve plug (8) and main valve housing (7) are formed and are slidably matched, and hold greatly outside and main valve housing (7) to coordinate form oil back chamber (16) in the middle part of valve body (5) cylindrical hole with main valve plug (8); Guide's valve seat (10) is installed in valve body (5) right-hand member cylindrical hole, the large end of main valve housing (7) is withstood in one end of guide's valve seat (10), the other end of guide's valve seat (10) is withstood by right end cap (13), right end cap (13) is installed on valve body (5) right-hand member, and main valve housing (7), main valve plug (8) and guide's valve seat (10) jointly surround and form sensitive cavity (15); Push rod (6) and main valve plug (8) small end keyhole formation are slidably matched, and one end of push rod (6) is arranged in load cavity (17) and withstands control piston small end, and the other end of push rod (6) is arranged in sensitive cavity (15) and withstands the small end of pilot valve (11); Main valve plug spring (9) is positioned at sensitive cavity (15), and main valve plug spring (9) one end withstands on the bottom of main valve plug (8) inner circular post holes, and the other end of main valve plug spring (9) withstands on the end face of guide's valve seat (10); Right end cap (13) is connected on valve body (5), and the left part cylndrical surface of right end cap (13) coordinates with valve body (5) right-hand member cylindrical hole and withstands on the end face of guide's valve seat (10); Guide's valve seat (10) and right end cap (13) surround formation second draining chamber (14) jointly; Pilot valve (11) small end is also formed through guide's valve seat (10) end orifices and is slidably matched, and the small end of pilot valve (11) is arranged in sensitive cavity (14), and the large end of pilot valve (11) is arranged in the second draining chamber (14); Pilot valve spring (12) is arranged in the second draining chamber (14), and one end of pilot valve spring (12) withstands on the large end stand shoulder of pilot valve (11), and the other end of pilot valve spring (12) withstands on bottom the inner circular post holes of right end cap (13);
Valve body (5) is provided with return opening A mouth and is communicated with oil back chamber (16); Valve body (5) is provided with load port B mouth and is communicated with load cavity (17); Valve body (5) is provided with the first drain tap L1 mouth and is communicated with the first draining chamber (18); Valve body (5) is provided with the second drain tap L2 mouth and is communicated with the second draining chamber (14); Control chamber (19) is communicated with the first draining chamber (18) by damping plug (3) inner aperture; Oil back chamber (16) is communicated with load cavity (17) by main valve plug (8) middle part valve port; Sensitive cavity (15) is communicated with load cavity (17) by the valve port at push rod (6) middle part; Sensitive cavity (15) is communicated with the second draining chamber (14) by the valve port of pilot valve (11) small end.
2. a kind of secondary loads control valve relief function being integrated in pilot valve according to claim 1, it is characterized in that: during original position, described load cavity (17) is communicated with sensitive cavity (15) by push rod (6) middle part valve port, and described load cavity (17) pressure directly acts in pilot valve (11).
3. a kind of secondary loads control valve relief function being integrated in pilot valve according to claim 1, is characterized in that: described pilot valve (11) and described main valve plug (8) coaxially, are in the same way arranged; Push rod (6) two ends are withstood by the small end of control piston (2) small end and pilot valve (11) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650585.7U CN204226321U (en) | 2014-11-04 | 2014-11-04 | A kind of secondary loads control valve relief function being integrated in pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420650585.7U CN204226321U (en) | 2014-11-04 | 2014-11-04 | A kind of secondary loads control valve relief function being integrated in pilot valve |
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| Publication Number | Publication Date |
|---|---|
| CN204226321U true CN204226321U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420650585.7U Withdrawn - After Issue CN204226321U (en) | 2014-11-04 | 2014-11-04 | A kind of secondary loads control valve relief function being integrated in pilot valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN204226321U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358728A (en) * | 2014-11-04 | 2015-02-18 | 浙江大学 | Secondary load control valve integrating overflow function on pilot valve core |
-
2014
- 2014-11-04 CN CN201420650585.7U patent/CN204226321U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104358728A (en) * | 2014-11-04 | 2015-02-18 | 浙江大学 | Secondary load control valve integrating overflow function on pilot valve core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150325 Effective date of abandoning: 20160504 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |