CN201944026U - Rotary valve and rotary control loop applying same - Google Patents
Rotary valve and rotary control loop applying same Download PDFInfo
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- CN201944026U CN201944026U CN2010206894772U CN201020689477U CN201944026U CN 201944026 U CN201944026 U CN 201944026U CN 2010206894772 U CN2010206894772 U CN 2010206894772U CN 201020689477 U CN201020689477 U CN 201020689477U CN 201944026 U CN201944026 U CN 201944026U
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Abstract
The utility model relates to a rotary valve and a rotary control loop applying the same. The rotary valve comprises a main valve and a control valve, wherein the main valve comprises a main valve rod, the control valve comprises a control valve rod, the control valve is connected with a valve body on the main valve, and the main valve rod and the control valve rod are abutted through a connecting piece. An oil pump is used for supplying oil for the rotary control loop, an overflow valve is arranged between the oil pump and the rotary valve, a cushion valve is connected in parallel onto an oil path between the main valve of the rotary valve and a motor, a control oil inlet of the control valve of the rotary valve is connected with an external oil source, the external oil source is used for supplying the oil for the control oil inlet, and a control oil outlet is communicated with a braking cylinder to supply the oil for the braking cylinder. The utility model has the advantages that: the control oil of the braking cylinder is controlled by the control valve which is connected with the main valve into a whole, i.e. the control valve rod can be synchronously driven through the movement of the main valve rod, so that the opening of the braking cylinder is better controlled. The rotary valve is not interfered by load pressure fluctuation, start-top operation stability can be realized under large and small flow quantities and light and heavy loads, and the impact of the rotary valve under a dynamic working condition is greatly reduced.
Description
Technical field
The utility model relates to rotary valve and the revolution control loop in the hydraulic element, relates in particular to the revolution control loop that turns round a kind of rotary valve of control on the hydraulic mobile crane swirl gear and use it.
Background technique
Swirl gear is one of four big functional entities of truck crane, and under the normal condition, swirl gear keeps braking state under the effect of its master cylinder, realize normal rotating function, must at first open break.In real work, require revolution to start, brake not have and impact, non-jitter operates steadily, particularly little opening does not produce shake when starting, travel when becoming at a slow speed fast suddenly in heavy duty, require steadily to have no abnormal sound, for reaching this purpose, in the revolution oil hydraulic circuit, must dispose relevant hydraulic element and control, to satisfy its function.More by such supporting product category of system for hydraulic system of truck crane rotary loop in the market, as the revolution combination valve, rotary control valve, revolution control assembly, bidirectional buffering valve, balancing brake valve etc.But in the middle of practical application, these valves all can not solve the shake of little opening and the heavy duty abnormal sound by fast slack-off generation well, this jiggly defective, and actual is due to the instability of master cylinder opens and closes.The control oil of traditional rotary valve has directly takes from the induced pressure hydraulic fluid port, is subjected to the influence of induced pressure fluctuation bigger, when little opening starts, flow is very little, and pressure surge is bigger, when possible and open master cylinder, the time and close master cylinder, it is unstable to cause master cylinder to be opened, and causes shake; But under severe duty, motor is by becoming idling (being to control throttle from large to small in the operation) at a high speed in a flash, the flow of working oil also thereupon from large to small, the oil pressure that flows into motor has become negative pressure (the actual pump that become of motor this moment), the oil pressure of control brake cylinder is also for negative, make master cylinder close rapidly, but pivoting support because rotating by force, the inertia of heavy duty cause abnormal sound; Though what have takes from oil sources, main valve stem fails to play the better controlled effect to controlling oil, also can make the keying of master cylinder produce instability and cause the revolution shakiness.On September 30th, 2009, State Intellectual Property Office discloses a kind of name and has been called " the revolution control assembly of hydraulic mobile crane ", application number is 200820211090.9 utility model patent specification, this product is by its Fill valve, damping plug and overload valve reduce its compression shock, but, along with improving constantly of product dynamic operation condition precision, the client has proposed more and more higher requirement, existing product can not satisfy the needs in market, based on this present situation, the keying of being badly in need of a kind of master cylinder of design can be controlled by the line stabilization that moves forward into of main valve stem, and the rotary valve of the influence of fluctuations that is not stressed, supporting required with the revolution control oil hydraulic circuit that satisfies numerous Hoisting Machineries.
Summary of the invention
In order to overcome little opening shake of traditional rotary valve and severe duty by becoming the defective that produces abnormal sound at a slow speed fast, technical problem to be solved in the utility model is to provide a kind of integration engineering crane rotation operating mode required various functions at prior art, the control valve control characteristic that can adapt to conventional construction in the truck system, the rotary valve that can satisfy again that little opening is not shaken and not produce abnormal sound during heavy duty by quick slack-off speed.The utility model also provides a kind of revolution control loop
The utility model solves the problems of the technologies described above the technological scheme that is adopted: this rotary valve, it is characterized in that, include main valve and control valve, main valve comprises main valve stem, control valve comprises the control valve rod, control valve links to each other with valve body on the main valve, and main valve stem and control valve rod offset by link.
Described control valve comprises control filler opening and control oil outlet, and the control valve rod of described control valve can be with the moving of main valve stem, thereby makes control filler opening and the connection of control oil outlet or the disconnection of control valve.
This revolution control loop comprises main valve, relief valve, trimmer valve group, motor and master cylinder, this revolution control loop is by oil pump feed, relief valve is arranged between oil pump and the rotary valve, trimmer valve is parallel on the main valve and the oil circuit between the motor of rotary valve, the control filler opening of the control valve of rotary valve links to each other with outside oil sources and by its fuel feeding, control oil outlet and master cylinder communicate, to give the master cylinder fuel feeding.
Compared with prior art, the utility model has the advantages that: the control oil of master cylinder is to control by the control valve that is connected as a single entity with main valve, thereby promptly moving of main valve stem can drive the control valve rod synchronously and move and make that the unlatching of master cylinder is controlled preferably.Be not subjected to the interference of induced pressure fluctuation,, all can realize the start and stop running under the weight load steadily, greatly cut down the impact under its dynamic operation condition at small-large flow.
Description of drawings
Fig. 1 is the structural representation of the utility model rotary valve;
Fig. 2 be among Fig. 1 A-A to sectional view;
Fig. 3 is the hydraulic work schematic diagram of the utility model rotary valve.
Among the figure, 1, main valve, 2, control valve, 3, screw, 4, the trimmer valve group, 5, motor, 6, master cylinder, 7, solenoid valve, 1a, main relief valve, 1b, overload valve, 1c, overload valve, 1d, solenoid valve, 1e, end cap, 1f, screw, 1g, valve body, 1h, main valve stem, 1i, gland, 2a, control valve body, 2b, locating piece, 2c, connected element, 2d, first return springs, 2e, spring seat, 2f, the control valve rod, 2g, cover plate, 2h, second return springs, 2i, screw, 2j, back-up ring, M, motor, a1, a2, a3, a4, a5, a6, a7 is the main valve oil pocket, b1, b2, b3, b4 is the control valve oil pocket, A, B, P, T, G, P
K,K, L, Y are hydraulic fluid port, and in Fig. 3, RB is main relief valve, and PR1, PR2 are overload valve.
Embodiment
Below in conjunction with accompanying drawing, details are as follows to embodiment:
See also Fig. 1, rotary valve of the present utility model comprises main valve 1 and control valve 2, and by screw 3 the two is linked to each other.Main relief valve 1a is housed on the main valve 1, rotary valve is played the overflow protective action, overload valve 1b and 1c also are housed on the main valve 1,, solenoid valve 1d is housed also in addition, after the energising, make revolution be in the state that freely trackslips having turned round overload protection and buffer function.
See also Fig. 2, described main valve 1 comprises valve body 1g and is positioned at the main valve stem 1h of valve body 1g.Described control valve 2 comprises control valve body 2a and the control valve rod 2f that is positioned at control valve body 2a,, described rotary valve also comprises link, this link comprises attachment screw 2c and locating piece 2b.The upper-end surface of this attachment screw 2c offsets with the lower end surface of control valve rod 2f, the lower end of attachment screw 2c links to each other with locating piece 2b by screw thread, the lower end of locating piece 2b links to each other with main valve stem 1h by screw thread, a positioning step is arranged, the stroke range of this positioning step restriction locating piece 2b on the cylindrical of locating piece 2b.
Described link also comprises connected element 2c, and the upper-end surface of this connected element 2c offsets with the lower end surface of control valve rod 2f, and the lower end of connected element 2c links to each other with locating piece 2b by screw thread, and the lower end of locating piece 2b links to each other with main valve stem 1h.
Described main valve 1 also comprises valve body 1g, described main valve stem 1h is positioned at valve body 1g, main valve 1 also comprises end cap 1e, end cap 1e is located at valve body 1g lower end, and be connected on the valve body 1g, valve body 1g upper end is provided with gland 1i, is enclosed within main valve stem 1h central authorities and matches with valve body 1g upper end seam and control valve body 2a lower end seam, and main valve stem 1h is located in the valve body 1g.
Described control valve 2 also comprises the first return springs 2d and the second return springs 2h, and the first return springs 2d is arranged between valve body 1g and the main valve stem 1h, so that main valve stem 1h resets; The second return springs 2h replaces control valve rod 2f so that it resets.In this example,
The first return springs 2d and the second return springs 2h are spring.
Described control valve 2 also comprises back-up ring 2j, with spring seat 2e, back-up ring 2j is arranged at the bottom in the control valve body 2a, and offset with main valve stem 1h top, the upper-end surface of spring seat 2e and control valve body 2a endoporus bottom surface offset, control valve body 2a end has seam to match with gland 1i, control valve body 2a top is connected with cover plate 2g, the second return springs 2h is located in the cover plate 2g, the seam end face of control valve rod 2f is withstood in the lower end of the second return springs 2h, the interior hole end surface of cover plate 2g is withstood in the upper end, the first return springs 2d is enclosed within on the locating piece 2b, and the upper-end surface of lower end and back-up ring 2j offsets, and the lower end surface of upper end and spring seat 2e offsets.In this example, control valve 2 is the 3-position-3-way valve.
In Fig. 3, main relief valve, two overload valves and solenoid valve are housed further on the main valve.
Work control procedure of the present utility model as shown in Figure 3.
The revolution control loop of using the utility model rotary valve comprises main valve 1, relief valve 1a, trimmer valve group 4, motor 5, solenoid valve 7 and master cylinder 6.Trimmer valve group 4 comprises overload valve PR1 and PR2.This revolution control loop is by oil pump feed, and relief valve 1a is arranged between oil pump and the rotary valve.Trimmer valve 4 is parallel on the main valve 1 and the oil circuit between the motor 5 of rotary valve.The control oil inlet P of the control valve 2 of rotary valve
kLink to each other with outside oil sources and by its fuel feeding, control oil outlet K and master cylinder 6 communicate, to give master cylinder 6 fuel feeding.
Described solenoid valve 7 is used for independent control brake cylinder 6, its oil outlet links to each other with master cylinder 6, and and control valve 2 parallel connections, and a shuttle valve (among the figure mark) is connected between control valve 2 and the solenoid valve 7, so that the oil pocket of master cylinder 6 optionally links to each other with control valve 2 or solenoid valve 7.
Oil pump comes oil to enter the hydraulic fluid port P of main valve 1, and when main valve stem 1h was in meta, hydraulic fluid port P came oil directly through hydraulic fluid port T oil return.After main valve stem 1h was pushed into, the oil of hydraulic fluid port P flowed into hydraulic fluid port A, flowed into hydraulic fluid port B behind rotary motor, and hydraulic fluid port B communicated with hydraulic fluid port T and flowed back to fuel tank this moment; In like manner, after main valve stem 1h was drawn out, the oil of hydraulic fluid port P flowed into hydraulic fluid port B, arrived hydraulic fluid port A behind rotary motor, and hydraulic fluid port A communicated with hydraulic fluid port T and flowed back to fuel tank this moment; When main valve stem 1h is pushed into or pulls out, because control valve rod 2f and main valve stem 1h closely offset by link, control valve rod 2f at this moment and also can produce displacement synchronously, make the control oil inlet P of control valve 2
kK is communicated with the control oil outlet, thereby the control oil in the control valve 2 is through the control oil inlet P
kArrive master cylinder again behind control oil outlet K, master cylinder is opened, motor can normal rotation, thereby realizes revolute function.
Can find out in conjunction with Fig. 2 that by Fig. 3 when main valve stem 1h was in meta, hydraulic fluid port P came oil through oil pocket a
5With oil pocket a
4After, flow back to fuel tank through hydraulic fluid port T again, after main valve stem 1h was pushed into, hydraulic fluid port P came oil through oil pocket a
5, oil pocket a
6After, entering the motor inlet through hydraulic fluid port A outflow again, the motor outlet then links to each other with hydraulic fluid port B, again through oil pocket a
2The chamber flows into oil pocket a
1, after hydraulic fluid port T oil return; In like manner, after valve rod was pulled out, hydraulic fluid port P was through oil pocket a
3, oil pocket a
2After flow into motor through hydraulic fluid port B again, and the motor outlet links to each other with hydraulic fluid port A, again through oil pocket a
6Flow into oil pocket a
7The chamber is after hydraulic fluid port T oil return.The control procedure of control section is such, when main valve stem 1h is in meta.
Can find out in conjunction with Fig. 2 that by Fig. 3 control oil is through P
kThe back arrives oil pocket b
2, this moment is because oil pocket b
2With oil pocket b
-3Can not communicate, its structure is: control valve rod 2f and control valve body 2a have formed seal section, and control oil can not arrive oil pocket b
3, promptly can not arrive control oil outlet K, control oil outlet K does not have pressure oil and can not open break; After main valve stem 1h is pushed towards control valve 2, withstand control valve rod 2f by attachment screw 2c and move oil pocket b
2With oil pocket b
-3Communicate the control oil inlet P
kThrough oil pocket b
2, oil pocket b
3The back flows into control oil outlet K, opens master cylinder; After main valve stem 1h was pulled out away from the direction of control valve 2 by court, control valve rod 2f promoted control valve rod 2f and makes it to be close to connected element 2c upper-end surface, oil pocket b under the second return springs 2h effect
2With oil pocket b
-3Communicate the control oil inlet P
kThrough oil pocket b
2, oil pocket b
3The back flows into control oil outlet K, opens master cylinder.
In the utility model, thereby the control oil of master cylinder is the moving belt brake control valve bar 2f by main valve stem 1h to be moved and makes that the unlatching of master cylinder is controlled preferably, master cylinder is not subjected to the interference of induced pressure fluctuation fully, at small-large flow, all can realize the start and stop running under the weight load steadily, greatly cut down the impact under its dynamic operation condition.
Be appreciated that above-mentioned all can adopt other modes to connect by screw or the structure that is threaded, as modes such as pin, clampings.In addition, as long as control valve rod 2f can be with the moving of main valve stem 1h, it both can directly offset, and also can offset indirectly.
Claims (10)
1. a rotary valve is characterized in that, includes main valve and control valve, and main valve comprises main valve stem, and control valve comprises the control valve rod, and control valve links to each other with valve body on the main valve, and main valve stem and control valve rod offset by link.
2. rotary valve according to claim 1, it is characterized in that, described control valve comprises control filler opening and control oil outlet, and the control valve rod of described control valve can be with the moving of main valve stem, thereby makes control filler opening and the connection of control oil outlet or the disconnection of control valve.
3. rotary valve according to claim 1, it is characterized in that, described control valve (2) also comprises control valve body (2a), described control valve rod (2f) is positioned at control valve body (2a), described rotary valve also comprises link, this link comprises locating piece (2b), and a positioning step is arranged on the cylindrical of locating piece (2b), the stroke range of this positioning step restriction locating piece (2b).
4. rotary valve according to claim 3, it is characterized in that, described link also comprises connected element (2c), the upper-end surface of this connected element (2c) offsets with the lower end surface of control valve rod (2f), the lower end of connected element (2c) links to each other with locating piece (2b) by screw thread, and the lower end of locating piece (2b) links to each other with main valve stem (1h).
5. according to claim 1 or 2 or 3 or 4 described rotary valves, it is characterized in that, described main valve (1) also comprises valve body (1g), described main valve stem (1h) is positioned at valve body (1g), main valve (1) also comprises end cap (1e), end cap (1e) is located at valve body (1g) lower end, and be connected on the valve body (1g), valve body (1g) upper end is provided with gland (1i), be enclosed within main valve stem (1h) central authorities and match with valve body (1g) upper end seam and control valve body (2a) lower end seam, main valve stem (1h) is located in the valve body (1g).
6. rotary valve according to claim 5, it is characterized in that, described control valve (2) also comprises first return springs (2d) and second return springs (2h), first return springs (2d) is arranged between valve body (1g) and the main valve stem (1h), so that main valve stem (1h) resets; Second return springs (2h) is replaced control valve rod (2f) so that it resets.
7. rotary valve according to claim 6, it is characterized in that, described control valve (2) also comprises back-up ring (2j), and spring seat (2e), back-up ring (2j) is arranged at the bottom in the control valve body (2a), and offset with main valve stem (1h) top, the upper-end surface of spring seat (2e) and control valve body (2a) endoporus bottom surface offset, control valve body (2a) end has seam to match with gland (1i), control valve body (2a) top is connected with cover plate (2g), second return springs (2h) is located in the cover plate (2g), the seam end face of control valve rod (2f) is withstood in the lower end of second return springs (2h), the interior hole end surface of cover plate (2g) is withstood in the upper end, first return springs (2d) is enclosed within on the locating piece (2b), and the upper-end surface of lower end and back-up ring (2j) offsets, and the lower end surface of upper end and spring seat (2e) offsets.
8. rotary valve according to claim 1 is characterized in that: main relief valve, two overload valves and solenoid valve further are housed on the main valve.
9. one kind is turned round control loop, it is characterized in that, it comprises as any described main valve (1), relief valve (1a), trimmer valve group (4), motor (5) and master cylinder (6) among the claim 1-8, this revolution control loop is by oil pump feed, relief valve (1a) is arranged between oil pump and the rotary valve, trimmer valve (4) is parallel on the main valve (1) and the oil circuit between the motor (5) of rotary valve, the control filler opening (P of the control valve of rotary valve (2)
k) link to each other with outside oil sources and by its fuel feeding, control oil outlet (K) and master cylinder (6) communicate, with to master cylinder (6) fuel feeding.
10. a kind of rotary valve according to claim 1, it is characterized in that, further comprise solenoid valve (7), the oil outlet of described solenoid valve (7) links to each other with master cylinder (6), and and control valve (2) parallel connection, and a shuttle valve is connected between control valve (2) and the solenoid valve (7) so that the oil pocket of master cylinder (6) optionally links to each other with solenoid valve (7) with control valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206894772U CN201944026U (en) | 2010-12-30 | 2010-12-30 | Rotary valve and rotary control loop applying same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206894772U CN201944026U (en) | 2010-12-30 | 2010-12-30 | Rotary valve and rotary control loop applying same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201944026U true CN201944026U (en) | 2011-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206894772U Expired - Lifetime CN201944026U (en) | 2010-12-30 | 2010-12-30 | Rotary valve and rotary control loop applying same |
Country Status (1)
| Country | Link |
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| CN (1) | CN201944026U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN103244496A (en) * | 2013-05-13 | 2013-08-14 | 三一汽车起重机械有限公司 | Rotary control valve unit, rotary control hydraulic system and crane |
| CN104564885A (en) * | 2015-01-08 | 2015-04-29 | 宁波宇洲液压科技有限公司 | High-integration bidirectional rotary valve for pilot control mode |
-
2010
- 2010-12-30 CN CN2010206894772U patent/CN201944026U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022393A (en) * | 2010-12-30 | 2011-04-20 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| WO2012088892A1 (en) * | 2010-12-30 | 2012-07-05 | 长沙中联重工科技发展股份有限公司 | Rotating valve and rotating control loop using same |
| CN102022393B (en) * | 2010-12-30 | 2013-04-24 | 常德中联重科液压有限公司 | Rotary valve and rotary control loop using same |
| CN103244496A (en) * | 2013-05-13 | 2013-08-14 | 三一汽车起重机械有限公司 | Rotary control valve unit, rotary control hydraulic system and crane |
| CN104564885A (en) * | 2015-01-08 | 2015-04-29 | 宁波宇洲液压科技有限公司 | High-integration bidirectional rotary valve for pilot control mode |
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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: 20110824 Effective date of abandoning: 20130424 |
|
| RGAV | Abandon patent right to avoid regrant |