CN202789807U - Travel control valve - Google Patents
Travel control valve Download PDFInfo
- Publication number
- CN202789807U CN202789807U CN201220415976.1U CN201220415976U CN202789807U CN 202789807 U CN202789807 U CN 202789807U CN 201220415976 U CN201220415976 U CN 201220415976U CN 202789807 U CN202789807 U CN 202789807U
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- CN
- China
- Prior art keywords
- valve body
- valve
- control valve
- spool
- cavity
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- Expired - Lifetime
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Abstract
The utility model relates to a travel control valve. The travel control valve comprises a valve body and a valve core which is arranged in an inner cavity of the valve body, wherein the valve core is matched with a controlling opening in the inner cavity of the valve body so as to divide the inner cavity into a front cavity and a back cavity, the valve body is provided with a first oil opening which is communicated with the front cavity and a second oil opening which is communicated with the back cavity, and the valve core is propped against a reset spring in the front cavity. The travel control valve is characterized in that one end part of the valve core is provided with a conical surface matched with the controlling opening, the other end part of the valve core slides in the back cavity in a sealing manner, and the other end part of the valve core extends out of the valve body so as to be an operating end. According to the travel control valve disclosed by the utility model, the conical surface is matched with the controlling opening, and the valve core and the valve body are sealed, so that an internal leakage situation of a control valve can be effectively solved; a plurality of sealing rings are utilized in the travel control valve so that the surface of the valve core out of the valve body can be prevented from being provided with oil, the use environment can be modified and the service life of the control valve is prolonged; and the travel control valve disclosed by the utility model can realize a changeable operation manner so as to have wider application range and stronger practicability.
Description
Technical field
The utility model relates to field of hydraulic control, relates in particular to a kind of stroke control valve of zero leakage.
Background technique
The hand-operated direction valve of often using in the hydraulic control system, it is the motion of controlling manually the relative valve body of spool, make the direction of oil circuit connection, shutoff or conversion oil stream, thus realize hydraulic actuator and driving mechanism thereof startup, stop or conversion moving direction.Spool adopts sliding valve structure in the existing selector valve, there are the following problems in actual use: seepage in the control mouth place of spool and valve body easily produces, and the O type circle of spool and valve seal joint is often damaged, cause the interior leakage of hydraulic mechanism, for actuator, these defectives cause misoperation easily.Secondly, be not fully relative static between spool and the valve body, cause easily the unstable of spool commutation action during commutation, for the hand-operated direction valve of spring reset, inharmonic phenomenon that can reset causes the unreliability of spool operation; At last, the handle of control valve core movement is arranged on the central position of valve body front end, the oil impregnate that the rubber cup shelves are lived dust and handle bottom is equipped with in the handle bottom, but in use, leather cup is thrown off easily, and aging easily in exposing to the sun and rain in the open, and then affect dust-proof effect, in addition, also increased the commutation resistance of handle when leather cup is installed, thereby affected the normal operation of hydraulic system.
The model utility content
Technical problem to be solved in the utility model is the present situation for prior art, and a kind of stroke control valve simple, zero leakage that assembles is provided.
The utility model solves the problems of the technologies described above the technological scheme that adopts: a kind of stroke control valve, comprise valve body and the spool that is arranged in the body cavity, described spool matches with control mouth in the body cavity and inner chamber is separated into ante-chamber and back cavity, have the first hydraulic fluid port that connects with ante-chamber and the second hydraulic fluid port that is connected with back cavity on the described valve body, described spool offsets with the Returnning spring that is arranged in ante-chamber, it is characterized in that: an end of described spool has the conical surface that matches with the control mouth, the sealing of the other end of described spool slides in the described back cavity, and stretches in described valve body outside the other end of this spool and become the operating end.
As further improvement of the utility model, be provided with a plurality of seal rings between described spool the other end and the valve body, to prevent on spool overhanging end oil being arranged.
In above-mentioned improvement project, preferably, described seal ring has three, and one of them seal ring is positioned at the back cavity port of described valve body, by the triple seal form, can effectively avoid being positioned at the band oil phenomenon of the outer spool of valve body.
In above-mentioned each scheme, be fixed with a pedestal on the described valve body, be hinged with the rocking arm that the operating end with described spool offsets at this pedestal.By the rotation of rocking arm, it is mobile in inner chamber to promote spool, i.e. this moment, utilization is lever principle, so it is comparatively light, laborsaving to operate.
Be preferably, described rocking arm is equipped with a movable disc in the end away from the hinged place by bearing pin, is connected with the position limit switch in convenient and the electronic control system, the oil cylinder in the hydraulic system.
Except the position limit switch in manual, the control system etc. drives the spool, can also be provided with electromagnetic coil at the place, operating end of described valve rod, by the movement electric, that dead electricity is controlled spool that gets of electromagnetic coil, so that the utlity model has more widely application.
Compared with prior art, the utility model has the advantage of: adopt the conical surface and control mouth cooperate and spool and valve body between sealing configuration, can effectively solve the internal leakage phenomenon of control valve; And adopt a plurality of seal rings, can avoid being positioned at the outer spool table of valve body and wear oil; Moreover, compare with single solenoid directional control valve, hand-operated direction valve, the utility model can be by manual control, mechanism operating, also can add the solenoid directional control valve that electromagnetic coil forms zero leakage at place, spool end operating end, so the utility model can be realized changeable maneuverability pattern, make its application wider, practicability is stronger.
Description of drawings
Fig. 1 is example structure schematic representation of the present utility model.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, the trip control valve comprises valve body 1, is arranged on the spool 2 in valve body 1 inner chamber, and wherein valve body 1 is integrated the part structure, can effectively reduce the leakage point of stroke control valve; One end of spool 2 has the conical surface 21 that matches with control mouth 11 in the body cavity and inner chamber is separated into ante-chamber a and back cavity b, have the first hydraulic fluid port A1 that connects with ante-chamber a and the second hydraulic fluid port A2 that is connected with back cavity b on the valve body, spool 2 offsets with Returnning spring 3 one ends that are arranged in ante-chamber a, the other end of Returnning spring 3 and spring seat 4 offset, spring seat 4 is threadedly connected to valve body 1, the sealing of the other end of spool slides among the back cavity b, and stretches in valve body 1 outside the other end of this spool 2 and become the operating end.
Between above-mentioned valve rod the other end and valve body, be provided with simultaneously a plurality of seal rings 5, in the present embodiment, seal ring 5 has three, one of them seal ring 5 is positioned at the back cavity b port of valve body, namely by improving the machining accuracy of back cavity b port, solves the existing large problem of plane sealing seepage, guarantee that spool is in moving process, be exposed to the outer spool face of valve body without oil, to improve Environmental Conditions, prolong the working life of control valve.
In order to reduce the steering force of stroke control valve, be fixed with a pedestal 6 at valve body, be hinged with the rocking arm 7 that the operating end with spool offsets at this pedestal, during use, rotate around its articulating point as long as promote rocking arm, utilize lever principle, can finish easily, easily the movement of spool.
For the position limit switch in convenient and stroke control valve and the electronic control system, the oil cylinder in the hydraulic system are connected, in the present embodiment, rocking arm is equipped with a movable disc 8 in the end away from the hinged place by bearing pin.
The working principle of this Stroke Control valve is as follows: under nature, spool will be controlled mouth 11 and close under the effect of Returnning spring 3, and the first hydraulic fluid port A1 is cut off mutually with the second hydraulic fluid port A2.When needs are connected the first hydraulic fluid port A1 and the second hydraulic fluid port A2, promote rocking arm 7 by external force and rotate, the spool that offsets with rocking arm 7 is moved, open control mouth 11, simultaneously compression reseting spring.In case the external force of cancelling, under the effect of Returnning spring, spool is closing control mouth 11 immediately.
The rocker structure in above-described embodiment, also can be provided with electromagnetic coil at the place, operating end of valve rod, this moment, stroke control valve formed the solenoid directional control valve of zero leakage, can obtain changeable mode of operation, and this control valve can be applied on the different occasions.
Claims (6)
1. stroke control valve, comprise valve body (1) and be arranged on spool (2) in the body cavity, described spool matches with control mouth (11) in the body cavity and inner chamber is separated into ante-chamber (a) and back cavity (b), have the first hydraulic fluid port (A1) that connects with ante-chamber (a) and the second hydraulic fluid port (A2) that is connected with back cavity (b) on the described valve body, described spool offsets with the Returnning spring (3) that is arranged in ante-chamber (a), it is characterized in that: an end of described spool has the conical surface (21) that matches with described control mouthful (11), the sealing of the other end of described spool slides in the described back cavity (b), and stretches in described valve body outside the other end of this spool and become the operating end.
2. stroke control valve according to claim 1 is characterized in that: be provided with a plurality of seal rings (5) between described spool the other end and the valve body.
3. stroke control valve according to claim 2, it is characterized in that: described seal ring (5) has three, and one of them seal ring is positioned at the back cavity port of described valve body.
4. according to claim 1 and 2 or 3 described stroke control valves, it is characterized in that: be fixed with a pedestal (6) on the described valve body, be hinged with the rocking arm (7) that the operating end with described spool offsets at this pedestal (6).
5. stroke control valve according to claim 4, it is characterized in that: described rocking arm (7) is equipped with a movable disc (8) in the end away from the hinged place by bearing pin.
6. it is characterized in that according to claim 1 and 2 or 3 described stroke control valves: the place, operating end at described spool is provided with electromagnetic coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415976.1U CN202789807U (en) | 2012-08-20 | 2012-08-20 | Travel control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220415976.1U CN202789807U (en) | 2012-08-20 | 2012-08-20 | Travel control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202789807U true CN202789807U (en) | 2013-03-13 |
Family
ID=47817073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220415976.1U Expired - Lifetime CN202789807U (en) | 2012-08-20 | 2012-08-20 | Travel control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202789807U (en) |
-
2012
- 2012-08-20 CN CN201220415976.1U patent/CN202789807U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |