CN209414290U - A kind of overflow valve with second level adjusting function - Google Patents
A kind of overflow valve with second level adjusting function Download PDFInfo
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- CN209414290U CN209414290U CN201822073195.9U CN201822073195U CN209414290U CN 209414290 U CN209414290 U CN 209414290U CN 201822073195 U CN201822073195 U CN 201822073195U CN 209414290 U CN209414290 U CN 209414290U
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- valve
- overflow
- overflow valve
- pilot
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Abstract
The utility model discloses a kind of overflow valves with second level adjusting function, it is related to overflow valve field, including valve pocket, and it is set to the main valve plug inside valve pocket, rigid limit washer is equipped between the overflow valve body and valve pocket, "O"-ring is sealed and is connected through a screw thread between overflow valve body and control valve body；Overflow valve valve inner is equipped with pilot valve, pilot valve passes through pilot valve spring and pressurization plunger and adjustment plunger flexible connection, pressurization plunger and adjustment swivel nut cooperation, adjust swivel nut internal whorl and adjustment screw thread cooperation, the adjustment swivel nut is threadedly engaged with big locking nut, and adjustment screw is threadedly engaged with small locking nut.On the basis of common safety overflow valve, increase secondary booster function, and it is realized using the overflow valve valve pocket before main valve plug and makes heart function by oneself, improve the cone sealing effect between overflow valve and control valve, and movable valve pocket has the function of preventing high pressure chest impacting with high pressure.
Description
Technical field
The present invention relates to a kind of overflow valves with second level adjusting function of multi-way control valve.
Background technique
For excavator as a kind of engineering machinery for being widely used in native stone and building aspect, action includes the earthwork
Mobile, finishing etc., working environment is also varied, so the reliability of its performance, safety, dynamic role are to make safely
The basis of industry.Excavator mainly includes dynamical element, executive component and control element, and control mainly includes automatically controlled and two kinds of hydraulic control
Form, hydraulic control are mainly realized that reliability, the stability of control directly determine the safety of its production by multi-way control valve.So
The safe and reliable of overflow valve as protection multi-way control valve has very important significance in excavator work.
Overflow valve is mounted on multi-way valve valve, has the function of protecting oil circuit, to guarantee the pressure of entire control valve not
More than the pressure of restriction, the normal work of each element is protected.However present overflow valve is mainly connected through a screw thread control
The adjustment of the pre compressed magnitude of guide's spring, and then its rated pressure is adjusted, belong to a kind of purely mechanic pressure regulation method, such knot
Structure can not achieve the secondary booster function for overflow valve in process of production.Secondly it is equipped with flexible valve pocket in overflow valve leading portion,
It is provided for overflow valve and makes heart function and protecting against shock function by oneself, overflow valve is also played while increasing and boring sealing effect
Protective effect.
Utility model content
The purpose of the utility model is to provide a kind of overflow valves with second level adjusting function, realize to the secondary of overflow valve
Function of increasing pressure, while being provided for overflow valve and making heart function and protecting against shock function by oneself.
To solve the above problems, the utility model discloses a kind of overflow valve with second level adjusting function, including valve pocket,
And it is set to the main valve plug inside valve pocket, main valve plug one end connect with main valve plug spring and its other end is made to be close proximity to valve pocket
On, main valve plug opposite sliding, the main valve plug spring other end can prop up the overflow valve body and valve pocket on overflow valve body to the left
Between be equipped with rigid limit washer, overflow valve body and control valve body between "O"-ring seal and be connected through a screw thread；It is described
Overflow valve body front end is equipped with strainer, and the strainer is pressed on overflow valve body by strainer spring base, and passes through the second steel
Silk retaining ring compresses；Overflow valve valve inner is equipped with pilot valve, and pilot valve passes through pilot valve spring and pressurization plunger and tune
Whole plunger flexible connection, pressurization plunger and adjustment swivel nut cooperation, adjustment swivel nut internal whorl and adjustment screw thread cooperation, it is described
Adjustment swivel nut is threadedly engaged with big locking nut, and adjustment screw is threadedly engaged with small locking nut, is set on the overflow valve body
There are pressurization pilot hole A, guide's throttle orifice, oil leak hole, the Adjusting bolt Adjusting screw is equipped with pressurization pilot hole B, sets on the main valve plug
There is throttle orifice.It is sealed in addition, "O"-ring is arranged at all static seals.
Further, wherein taper-face contact forms cone sealing, overflow valve valve inner cone inside the main valve plug and valve pocket
Face and pilot valve taper-face contact form cone sealing.
The utility model has the beneficial effects that:
Realize the secondary booster function for overflow valve.Secondly it is equipped with flexible valve pocket in overflow valve leading portion, is mentioned for overflow valve
It has supplied to make heart function and protecting against shock function by oneself, protective effect is also played for overflow valve while increasing and boring sealing effect.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described.It is clear that the accompanying drawings in the following description is this reality
Without creative efforts, may be used also for those of ordinary skill in the art with novel some embodiments
To obtain other drawings based on these drawings.
Fig. 1 is the overall structure diagram of the utility model；
In figure, 1, small locking nut, 2, adjustment screw, 3, adjustment swivel nut, 4, big locking nut, 5, adjustment plunger, 6, overflow
Stream valve body, 7, pressurization plunger, 8, pilot valve spring, 9, limiting gasket, the 10, first elastic spring, 11, pilot valve, 12,
Main valve plug spring, 13, valve pocket, 14, main valve plug, 15, control valve body, the 16, second elastic spring, 17, strainer spring base, 18,
Strainer, 19, pressurization pilot hole A, 20, pressurization pilot hole B, 21, throttle orifice, 22, guide oil throttle orifice, 23, drain tap.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described.Obviously, it is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
Embodiment one:
A kind of overflow valve with second level adjusting function as shown in Figure 1, including valve pocket 13, and be set to inside valve pocket
Main valve plug 14, main valve plug one end connect with main valve plug spring 12 and is close proximity to its other end on valve pocket, and main valve plug can be to the left
Opposite sliding, the main valve plug spring other end prop up on overflow valve body 6, and rigidity is equipped between the overflow valve body and valve pocket 13
Limiting gasket 9, "O"-ring is sealed and is connected through a screw thread between overflow valve body and control valve body 15；The overflow valve valve
Body front end is equipped with strainer 18, and the strainer is pressed on overflow valve body by strainer spring base 17, and is kept off by the second steel wire
Circle 16 compresses；Overflow valve valve inner is equipped with pilot valve 11, pilot valve by pilot valve spring 8 and pressurization plunger 7 and
It adjusts plunger 5 to be flexibly connected, pressurization plunger and adjustment swivel nut 3 cooperate, and adjustment swivel nut internal whorl is matched with adjustment 2 screw thread of screw
It closes, the adjustment swivel nut and big locking nut screw thread 4 cooperate, and adjustment screw and small locking nut screw thread 1 cooperate, the overflow valve
Valve body is equipped with pressurization pilot hole A19, guide's throttle orifice 22, oil leak hole 23, and the Adjusting bolt Adjusting screw is equipped with pressurization pilot hole
B20, the main valve plug are equipped with throttle orifice 21.It is sealed in addition, "O"-ring is arranged at all static seals.
Further, wherein taper-face contact forms cone sealing, overflow valve valve inner cone inside the main valve plug and valve pocket
Face and pilot valve taper-face contact form cone sealing.
The essence of the utility model is that overflow valve is let out in internal control, i.e., when the pressure of working connection is higher than the pressure of overflow valve setting
When power, overflow occurs, on the basis of common safety overflow valve, increases secondary booster function, and using before main valve plug 14
The overflow valve valve pocket 13 in face, which realizes, makes heart function by oneself, improves the cone sealing effect between overflow valve and control valve, and living
Dynamic valve pocket has the function of preventing high pressure chest A impacting with high pressure.
When the pressure of high pressure chest A is lower than the setting pressure of overflow valve, overflow valve is in close state, and is not overflow
The level-one setting pressure of stream, overflow valve is by being threadedly engaged in adjusting screw 2 and Adjusting bolt Adjusting screw 3, so that pilot plunger 5
It is moved right with pressurization plunger 7, changes the pre compressed magnitude of pilot valve spring 8, and then the unlatching for changing pilot valve 11 presses
Power sets level-one oil pressure relief to realize the pressure change of 14 opening point of main valve plug.Second level oil pressure relief is by 2. number oil circuit
Guide oil is provided, by the pressurization pilot hole A19 on overflow valve body 6, then passes through the pressurization pilot hole B20 on Adjusting bolt Adjusting screw 3,
In the inner cavity for reaching pressurization plunger 7, so that pressurization plunger 7 moves right, pilot valve spring 8 is compressed, and then change pilot valve
The unlatching point pressure of core 11 sets second level oil pressure relief to realize the pressure change of 14 opening point of main valve plug.
When having hydraulic oil in high pressure chest A, hydraulic oil enters empty along 3. number oil circuit by the throttle orifice 21 of main valve plug 14
Chamber B, the filtering through filter screen 17 pass through the guide oil throttle orifice 22 of overflow valve body 6.When the pressure of high pressure chest A is greater than setting
When pressure, the pressure of chamber B is transmitted in pilot valve 11, pushes pilot valve 11 open, passes through the draining on overflow valve body 6
Mouth 23, reaches the oil back chamber C of control valve, and at the same time, when 3. a number oil circuit leads to oil back chamber, the pressure in chamber B is lower than high pressure
Pressure in chamber A, the hydraulic oil inside high pressure chest A pushes main single spool 14 open at this time, by the oil return opening on valve pocket 13 along 1.
To oil back chamber C, overflow occurs for overflow valve for number oil circuit.
Valve pocket 13 passes through the flexible connection of elastic spring 10 and valve pocket 13 and the card slot on valve body 6, so that valve pocket 13 exists
Along check valve 14 open direction have certain displacement, when there is impacting with high pressure in high-voltage oil cavity A, main valve plug 14 with
Valve pocket 13 opens simultaneously, and plays the role of protecting overflow valve.
Overflow valve body 6 and overflow valve valve pocket 13 use non-rigid connection, so that overflow valve valve pocket 13 and control valve body
When 15 contact, valve pocket 13 has certain amount of exercise, so that when the taper-face contact of the conical surface of valve pocket 13 and valve body 15, overflow
Valve valve pocket 13, which just has, certain makes heart function by oneself.
Claims (3)
1. a kind of overflow valve with second level adjusting function, it is characterised in that: including valve pocket (13), and be set to inside valve pocket
Main valve plug (14), main valve plug one end connect with main valve plug spring (12) and is close proximity to its other end on valve pocket, and main valve plug can
Opposite sliding to the left, the main valve plug spring other end props up on overflow valve body (6), between the overflow valve body and valve pocket (13)
Equipped with rigid limit washer (9), "O"-ring is sealed and is connected through a screw thread between overflow valve body and control valve body (15)；
Overflow valve body front end is equipped with strainer (18), and the strainer is pressed on overflow valve body by strainer spring base (17),
And it is compressed by the second elastic spring (16)；Overflow valve valve inner is equipped with pilot valve (11), and pilot valve passes through pilot valve
Core spring (8) and pressurization plunger (7) and adjustment plunger (5) flexible connection, pressurization plunger and adjustment swivel nut (3) cooperation, adjust spiral shell
Set internal whorl is threadedly engaged with adjustment screw (2), and the adjustment swivel nut and big locking nut screw thread (4) cooperate, and adjusts screw
With small locking nut screw thread (1) cooperate, the overflow valve body be equipped with pressurization pilot hole A(19), guide's throttle orifice (22), let out
Oilhole (23), the adjustment swivel nut are equipped with pressurization pilot hole B(20), the main valve plug is equipped with throttle orifice (21).
2. a kind of overflow valve with second level adjusting function according to claim 1, it is characterised in that: the main valve plug with
Taper-face contact forms cone sealing inside valve pocket.
3. a kind of overflow valve with second level adjusting function according to claim 1, it is characterised in that: the overflow valve valve
Internal portion's conical surface and pilot valve taper-face contact form cone sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822073195.9U CN209414290U (en) | 2018-12-11 | 2018-12-11 | A kind of overflow valve with second level adjusting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822073195.9U CN209414290U (en) | 2018-12-11 | 2018-12-11 | A kind of overflow valve with second level adjusting function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209414290U true CN209414290U (en) | 2019-09-20 |
Family
ID=67937542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822073195.9U Active CN209414290U (en) | 2018-12-11 | 2018-12-11 | A kind of overflow valve with second level adjusting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209414290U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096682A (en) * | 2020-09-30 | 2020-12-18 | 潍柴动力股份有限公司 | Pilot-operated type electric proportional high-pressure overflow valve |
| CN112682378A (en) * | 2020-12-23 | 2021-04-20 | 南岳电控（衡阳）工业技术股份有限公司 | But pressure boost screw thread cartridge formula guide overflow valve |
| CN112923108A (en) * | 2021-03-10 | 2021-06-08 | 力源液压（苏州）有限公司 | Pilot pressurizing two-stage overflow valve |
-
2018
- 2018-12-11 CN CN201822073195.9U patent/CN209414290U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096682A (en) * | 2020-09-30 | 2020-12-18 | 潍柴动力股份有限公司 | Pilot-operated type electric proportional high-pressure overflow valve |
| CN112096682B (en) * | 2020-09-30 | 2021-11-19 | 潍柴动力股份有限公司 | Pilot-operated type electric proportional high-pressure overflow valve |
| CN112682378A (en) * | 2020-12-23 | 2021-04-20 | 南岳电控（衡阳）工业技术股份有限公司 | But pressure boost screw thread cartridge formula guide overflow valve |
| CN112923108A (en) * | 2021-03-10 | 2021-06-08 | 力源液压（苏州）有限公司 | Pilot pressurizing two-stage overflow valve |
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