CN203272310U - Manual operation pilot valve and valve element thereof - Google Patents
Manual operation pilot valve and valve element thereof Download PDFInfo
- Publication number
- CN203272310U CN203272310U CN 201320287641 CN201320287641U CN203272310U CN 203272310 U CN203272310 U CN 203272310U CN 201320287641 CN201320287641 CN 201320287641 CN 201320287641 U CN201320287641 U CN 201320287641U CN 203272310 U CN203272310 U CN 203272310U
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- spool
- frustum
- oil
- convex shoulder
- diameter
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Abstract
The utility model relates to a manual operation pilot valve and a valve element thereof. The valve element comprises a valve element body. An upper crossette in sliding fit with an upper annular boss in a sealing mode is arranged on the valve element body, wherein the upper annular boss is arranged between a corresponding oil returning cavity and a control oil channel, the lower end of the upper crossette protrudes downwards to form a frustum with the upper end with the major diameter and the lower end with the minor diameter, the diameter of the big end of the frustum is not larger than that of the upper crossette, the frustum and the upper crossette are coaxially arranged, and the periphery of the frustum is provided with an upper throttling groove for connecting the corresponding control oil channel and the oil returning cavity. According to the valve element, the service life of the valve element and the service life of a valve body can be guaranteed, and the stable changes of hydraulic oil mass can be guaranteed in the process of connecting and disconnecting the oil returning cavity and the control oil channel.
Description
Technical field
The utility model relates to the Manual pilot control valve that uses in a kind of engineering machinery.
Background technique
Manual pilot valve is the hydraulic product that is widely used in various engineering machinery and construction machinery equipment, Main Function is accurately to control the commutation of main reversing valve at the hydraulic system medium-long range, and then control the accurate action of the executive components such as required oil hydraulic motor and oil cylinder, this type product is widely used in the walking hydraulic control of equipment at present.existing manual pilot valve as disclosed in Chinese patent CN202251182U " a kind of manual pilot valve ", in comprising, this manual pilot valve is provided with oil back chamber, control the valve body of oil duct and oil suction chamber, also being provided with axis on valve body extends along the vertical direction, and respectively with oil back chamber, control the spool mounting hole that oil duct and oil suction chamber are communicated with, be provided with upper annular boss on the hole wall of spool mounting hole between oil back chamber and control oil duct, be provided with lower annular boss in controlling between oil duct and oil suction chamber on the hole wall of spool mounting hole, on, in the endoporus of lower annular boss, guiding is coated with spool, be provided with in the top of spool the Handleset that forces spool to move down on valve body, be provided with on valve body and force the Returnning spring that moves on spool.Spool is the second order concentric structure that is provided with upper and lower convex shoulder, and the upper convex shoulder of spool coordinates with upper annular boss slipper seal, and the lower convex shoulder of spool coordinates with lower annular boss slipper seal, offers respectively throttling groove and lower throttling groove on upper convex shoulder and lower convex shoulder.The working procedure of manual pilot valve is: when Handleset is in meta, spool is subjected to action of reset spring power to be in the upper position, the lower convex shoulder of spool seals oil suction chamber, control hydraulic oil and be closed in oil suction chamber, the hydraulic oil that enters from the control oil duct flows back to fuel tank through upper throttling groove, oil back chamber; Move down when Handleset promotion spool overcomes acting force of the spring, on upper convex shoulder and valve body, annular boss is sealed and matched, and controls oil duct and oil back chamber and is disconnected, and realizes main valve work thereby the hydraulic oil in oil suction chamber enters the control oil duct through lower throttling groove.
The problem that existing this manual pilot valve exists is: arrange due to upper throttling groove on the cylindricality circumferential surface of upper convex shoulder, move on spool and make throttling groove be communicated with oil back chamber and control in the process of oil duct, can only come conducting to control oil duct and oil back chamber by throttling groove, move down in the process that disconnects oil back chamber and control oil duct at spool, the closed process of throttling groove also can be very rapidly, in conducting and disconnecting oil back chamber and control the process of oil duct, the flow nonlinear change of hydraulic oil, the changes in flow rate of hydraulic oil is steady not; On the other hand, be gathered in that on convex shoulder and valve body, the foul particle between annular boss can cause wearing and tearing to the outer circumferential face of spool and the hole wall of spool mounting hole, affect the working life of spool and valve body.
The model utility content
The purpose of this utility model is to provide a kind of working life that can guarantee spool and valve body, can guarantee that again hydraulic-oil quantity changes spool stably in the process of conducting and disconnection oil back chamber and control oil duct; The purpose of this utility model also is to provide a kind of manual pilot valve that uses this spool.
In order to address the above problem, in the utility model, the technological scheme of spool is:
The spool of manual pilot valve, comprise the spool body, be provided with for and be arranged on the upper annular boss sealed sliding upper convex shoulder movingly between corresponding oil back chamber and control oil duct on the spool body, the lower end of described upper convex shoulder convexes with the frustum that upper end diameter is large, lower end diameter is little downwards, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, and offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber on the outer circumferential face of described frustum.
The span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
The Outside diameter of described frustum is less than the diameter of described upper convex shoulder.
Described upper throttling groove be shaped as semicircle.
In the utility model, the technological scheme of hand-operated direction valve is:
a kind of manual pilot valve, comprise and be provided with oil back chamber, control the valve body of oil duct and oil suction chamber, being provided with axis on valve body extends along the vertical direction, and be communicated with described oil back chamber, control the spool mounting hole of oil duct and oil suction chamber, be provided with upper annular boss on the hole wall of spool mounting hole between oil back chamber and control oil duct, be provided with lower annular boss in controlling between oil duct and oil suction chamber on the hole wall of spool mounting hole, on, in the endoporus of lower annular boss, guiding is coated with spool, spool comprises the spool body, be provided with on the spool body be respectively used to described on, movingly upper of the corresponding sealed sliding of lower annular boss, lower convex shoulder, it is large that the lower end of described upper convex shoulder convexes with upper end diameter downwards, the frustum that lower end diameter is little, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber on the outer circumferential face of described frustum.
The span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
The Outside diameter of described frustum is less than the diameter of described upper convex shoulder.
Described upper throttling groove be shaped as semicircle.
the beneficial effects of the utility model are: spool is when being in the upper position, oil suction chamber is by the lower convex shoulder shutoff of spool, control oil duct by radial clearance and oil back chamber conducting between upper throttling groove and frustum and upper annular boss, when needs oil suction chamber and the conducting of control oil duct, Handleset drives spool and moves down, upper throttling groove is gradually by shutoff, radial clearance between frustum and upper annular boss is also dwindled gradually simultaneously, radial clearance between frustum and upper annular boss is dwindled gradually the flow of controlling hydraulic oil between oil duct and oil back chamber is diminished gradually, the flow of hydraulic oil keeps linear change, changes in flow rate is steady, reduced the stream group, in like manner, in the process of controlling oil duct and oil back chamber conducting, the flow of hydraulic oil becomes greatly gradually, and the flow of hydraulic oil is linear variation also, in addition, radial clearance between frustum and upper annular boss can also store the foul particle, when spool moves down, the foul particle is stored in radial clearance between frustum and upper annular boss, can not damage the face that is sealed and matched of convex shoulder and upper annular boss, guarantee the working life of spool and valve body, when moving on spool, foul particle in frustum and upper annular boss gap is rushed to oil back chamber by hydraulic oil, and then flows into corresponding fuel tank.
Description of drawings
Fig. 1 is the structural representation of an embodiment of manual pilot valve in the utility model, is also the use phase diagram of an embodiment of spool in the utility model simultaneously;
Fig. 2 is the schematic diagram that coordinates of spool and valve body in Fig. 1;
Fig. 3 is the cooperation schematic diagram of spool in Fig. 1, push rod and spring mounting seat;
Fig. 4 is the plan view of Fig. 3 medi-spring fitting seat.
Embodiment
the embodiment of manual pilot valve is as shown in Fig. 1 ~ 4: be provided with oil back chamber 28 in comprising, control the valve body 1 of oil duct 31 and oil suction chamber 30, the upper end cap of valve body is equipped with valve gap 15, being provided with axis on valve body extends along the vertical direction, and connection oil back chamber, control the spool mounting hole 33 of oil duct and oil suction chamber, be provided with upper annular boss 50 on the hole wall of spool mounting hole between oil back chamber and control oil duct, be provided with lower annular boss 51 in controlling between oil duct and oil suction chamber on the hole wall of spool mounting hole, on, in the endoporus of lower annular boss, guiding is coated with spool 2, the upper end of spool is provided with spool shaft shoulder 2-1, the outer race of spool is equipped with spring mounting seat 8, spring mounting seat comprises the fitting seat body, be top-loaded with respectively Returnning spring 6 and driving spring 7 between fitting seat body and valve body and spool, between driving spring and spool, pad is equipped with spring adjusting pad, Returnning spring and driving spring all adopt the low-carbon spring steel silk.Be provided with the spool perforation 40 that runs through along the vertical direction the fitting seat body on the fitting seat body, the spool perforation is being Pear Shaped perpendicular to the sectional shape on above-below direction, the large bore portion 40-1 of spool perforation passes from the bottom to top for the spool shaft shoulder, the diameter of large bore portion is greater than the external diameter of the spool shaft shoulder, the diameter of the aperture part 40-2 of spool perforation is less than the external diameter of the spool shaft shoulder, and the bore of large and small bore portion joint is not less than the spool external diameter that is connected with spool shaft shoulder lower end.In the upper end of fitting seat body, push rod guide sleeve 13 is installed on valve body, be coated with by Yx RunddichtringO 12 sealing guiding the push rod 14 that the lower end coordinates with fitting seat body pushing tow in the endoporus of push rod guide sleeve, the shaft shoulder pilot hole 14-1 that the lower end of push rod is provided with little bore portion and is coaxially set, also installs for the vertical guiding of the spool shaft shoulder.Be provided with on valve body for promote the Handleset that spool moves down by push rod.Handleset comprises the handle 11 that is articulated in the valve gap top by universal joint 3, be provided with the gland 4 for the pushing tow push rod on handle, be covered with boot seal 22 on gland, handle top is equipped with horn switch button, is provided with in handle that the length bearing of trend is consistent with the decreased food bearing of trend, and the thread hole that installs of the cable that is used for being connected with horn switch button.the upper end of push rod pushing tow bottom gland coordinates, the lower end of push rod guide sleeve is provided with the flange 32 that turns up, the upper end of push rod guide sleeve is plugged in guide sleeve the first mounting hole on valve gap, the flange that turns up of push rod guide sleeve seals in guide sleeve the second mounting hole 25 that is inserted on valve body by O RunddichtringO 10, be provided with installation step 26 between guide sleeve the second mounting hole and oil back chamber, installation step has spacing be directed upwardly, be used for the step surface that block coordinates bottom the flange that turns up, turn up the upper-end surface of flange and guide sleeve the first mounting hole lower stomidium along between pad two guide sleeves be housed regulate pads 19.
Be provided with on spool and be respectively used to and upper and lower annular boss sealed sliding upper convex shoulder 53 and lower convex shoulder 54 movingly, be provided with the lower throttling groove 34 of controlling oil duct and oil suction chamber for conducting on lower convex shoulder, lower throttling groove be shaped as U-shaped; Upper convex shoulder lower end convexes with the frustum 55 that upper end diameter is large, lower end diameter is little downwards, the Outside diameter of frustum is slightly less than the diameter of convex shoulder, can better help to store the booty particle like this, frustum and upper convex shoulder are coaxially set, offer the upper throttling groove 56 of controlling oil duct and oil back chamber for conducting on the outer circumferential face of frustum, upper throttling groove be shaped as semicircle, the span of upper throttling groove on above-below direction is greater than the axial length of tapered sleeve.be provided with multi-turn on the outer circumferential face of spool lower end along the balancing slit 36 of the axially spaced-apart setting of spool, spool top is provided with damping hole, damping hole has improved the operating characteristics of pilot valve, can reduce extraneous vibration to the impact of valve operation, make the more stable work of pilot valve, improved simultaneously the service behaviour of reduction valve, reduce the motion frequency of spool, the wearing and tearing of spool have been reduced, increased functional reliability, the concentric guiding valve differential area design of the two-stage up and down of manual pilot valve uniqueness can effectively reduce control area, therefore the product steering force is less, can complete all the time accurately, but repetitive operation.Simultaneously just because of the differential area structural design of the concentric guiding valve of two-stage, just make the guiding valve underpart to be connected with return opening, and the damping hole structure is set becomes possibility; Semicircular upper throttling groove has increased the flow conductivity of upper throttling groove, and the upper end of upper throttling groove extends on convex shoulder, can make throttling groove control oil duct and oil back chamber prior to the gap conducting between frustum and upper annular boss, makes the oil return process more steady.
In other embodiment of this manual pilot valve: the shape of upper throttling groove can also be U-shaped or other shape; The span that upper throttling groove is gone up along the vertical direction also can be equal to or less than the axial height of frustum; The Outside diameter of frustum also can equal the diameter of convex shoulder.
The embodiment of spool is as shown in Fig. 1 ~ 4: the concrete structure of spool is identical with the spool described in above-mentioned each manual pilot valve embodiment, is not described in detail in this.
Claims (8)
1. the spool of manual pilot valve, comprise the spool body, be provided with for and be arranged on the upper annular boss sealed sliding upper convex shoulder movingly between corresponding oil back chamber and control oil duct on the spool body, it is characterized in that: the lower end of described upper convex shoulder convexes with the frustum that upper end diameter is large, lower end diameter is little downwards, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, and offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber on the outer circumferential face of described frustum.
2. spool according to claim 1, it is characterized in that: the span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
3. spool according to claim 1, it is characterized in that: the Outside diameter of described frustum is less than the diameter of described upper convex shoulder.
4. according to claim 1 ~ 3 described spools of any one is characterized in that: described upper throttling groove be shaped as semicircle.
5. manual pilot valve, comprise and be provided with oil back chamber, control the valve body of oil duct and oil suction chamber, being provided with axis on valve body extends along the vertical direction, and be communicated with described oil back chamber, control the spool mounting hole of oil duct and oil suction chamber, be provided with upper annular boss on the hole wall of spool mounting hole between oil back chamber and control oil duct, be provided with lower annular boss in controlling between oil duct and oil suction chamber on the hole wall of spool mounting hole, on, in the endoporus of lower annular boss, guiding is coated with spool, spool comprises the spool body, be provided with on the spool body be respectively used to described on, movingly upper of the corresponding sealed sliding of lower annular boss, lower convex shoulder, it is characterized in that: it is large that the lower end of described upper convex shoulder convexes with upper end diameter downwards, the frustum that lower end diameter is little, the Outside diameter of described frustum is not more than the diameter of described upper convex shoulder, described frustum and described upper convex shoulder are coaxially set, offer the upper throttling groove for the corresponding control oil duct of conducting and oil back chamber on the outer circumferential face of described frustum.
6. manual pilot valve according to claim 5, it is characterized in that: the span of described upper throttling groove on above-below direction is not less than the axial height of described frustum.
7. manual pilot valve according to claim 5, it is characterized in that: the Outside diameter of described frustum is less than the diameter of described upper convex shoulder.
8. according to claim 5 ~ 7 described manual pilot valves of any one is characterized in that: described upper throttling groove be shaped as semicircle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320287641 CN203272310U (en) | 2013-05-24 | 2013-05-24 | Manual operation pilot valve and valve element thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320287641 CN203272310U (en) | 2013-05-24 | 2013-05-24 | Manual operation pilot valve and valve element thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203272310U true CN203272310U (en) | 2013-11-06 |
Family
ID=49502732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320287641 Expired - Fee Related CN203272310U (en) | 2013-05-24 | 2013-05-24 | Manual operation pilot valve and valve element thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203272310U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256269A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Manual pilot valve and spool thereof |
-
2013
- 2013-05-24 CN CN 201320287641 patent/CN203272310U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256269A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Manual pilot valve and spool thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 453000 Jiefang Road, Henan, Xinxiang, No. 1 Patentee after: Xinxiang Pingyuan Aviation Equipment Co., Ltd. Address before: 453000 Jiefang Road, Henan, Xinxiang, No. 1 Patentee before: Pingyuan Machine Factory (Xinxiang) |
|
| CP01 | Change in the name or title of a patent holder | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20210524 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |