CN207229854U - Dumper air control distribution valve overflow valve - Google Patents
Dumper air control distribution valve overflow valve Download PDFInfo
- Publication number
- CN207229854U CN207229854U CN201721217375.9U CN201721217375U CN207229854U CN 207229854 U CN207229854 U CN 207229854U CN 201721217375 U CN201721217375 U CN 201721217375U CN 207229854 U CN207229854 U CN 207229854U
- Authority
- CN
- China
- Prior art keywords
- hole
- piston
- valve
- overflow
- overflow valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a kind of dumper air control distribution valve overflow valve, including overflow valve body, overflow spool, pressure regulating screw, cylinder block and piston of dying, cylinder block is equipped with piston hole, it is additionally provided with the distribution valve outlet hole for radially extending and being connected with piston hole, Pneumatic valve connects hole and limit valve connects hole, piston of dying is slidedly arranged in piston hole, piston of dying is equipped with annular driver slot, the lower outside of piston of dying is set with the return spring being installed between piston only and piston hole bottom, the lower part of pressure regulating screw is spirally connected with cylinder block, top is spirally connected with the overflow valve chamber in overflow valve body, the lower end of pressure regulating screw is equipped with for the promotion hole that piston is put in of dying.Overflow valve intracavitary is equipped with spring base, and compression spring is equipped between the upper end of pressure regulating screw and spring base.The structure of the utility model is small, and the change to original air control distribution valve is little, solves the problems, such as that hydraulic cylinder frequently rises cylinder.
Description
Technical field
The utility model belongs to voltage limiting air control distribution valve device field, and in particular to a kind of dumper air control distribution valve, which is used, to overflow
Flow valve.
Background technology
Pressure-limiting air control distribution valve for dump truck, also referred to as Pneumatic reversal valve, are three position three-way change valves, pass through Automobile air
Source, by Pneumatic valve control realize Tipper Lifting, in the function stopping, decline.The general control mode of air control distribution valve have gas or
Electricity, in order to protect the hydraulic system of dumper, overflow valve must be added on air control distribution valve, because of the structure letter of air control distribution valve
It is single, practical, through type overflow valve can only be increased, the greatest drawback of this overflow valve is excess flow deficiency, directly the result is that
The hydraulic system of dumper is not protected, the hydraulic cylinder of dumper is frequently occurred the cylinder that rises.
To solve the above problems, the gas control of dumper or automatically controlled distributing valve mostly use pilot operated compound relief valve, increase by one
Oil duct is bypassed, promotes a piston using oil pressure relief, piston drives main valve stem to return to middle off-position and puts by connecting rod, such oil pump
Oil be just returned directly to fuel tank, system pressure moment back to zero, so as to protect hydraulic system.
The basic principle of dumper air control distribution valve is：Lifting promotes valve rod to lifting by control cylinder lifting chamber ventilation
Position, the high pressure oil of oil pump are lifted by air control distribution valve to hydraulic cylinder, dumper unloading；The middle off-position of air control distribution valve is to block
The hydraulic fluid port of hydraulic cylinder, compartment stop, at this time the direct oil return box of the hydraulic oil of oil pump；Lower decrease is that hydraulic cylinder hydraulic fluid port connects with fuel tank
Logical, the dead weight by body of tipper carriage is fallen.It is universal phenomenon that dumper overloads at home, in order to protect hydraulic system, gas control point
With being equipped with overflow valve on valve, but the air control distribution valve that Qingdao heavy industry dumper uses is simple in structure, can not increase pilot-operated type and overflow
Valve is flowed, the excess flow of through type overflow valve is again too small, it is difficult to protects hydraulic system, solution is exactly on air control distribution valve
It is equipped with plug-in overflow valve.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of dumper air control distribution valve overflow valve, structure is small,
Change to existing air control distribution valve is little, but can solve the problems, such as that hydraulic cylinder rises cylinder.
In order to solve the above technical problems, the embodiment of the utility model provides a kind of dumper air control distribution valve overflow
Valve, including overflow valve body, overflow spool, pressure regulating screw, cylinder block and piston of dying, the cylinder block be equipped with it is axially extending,
The piston hole of upper end opening, lower end closed, the cylinder block are equipped with the distributing valve row for radially extending and being connected with piston hole
Stomata, Pneumatic valve connect hole and limit valve connects hole, and the piston of dying is slidedly arranged in piston hole, and the piston of dying includes piston sheet
Body and piston handle, the piston handle is shaped in the lower end of piston only and diameter is less than the diameter of piston only, the work
Fill in body and be equipped with annular driver slot, the outer sheath of the piston handle is equipped with return spring, and the return spring is installed in piston
Between body and piston hole bottom, the cylinder block is equipped with pressure regulating screw mounting hole, and the pressure regulating screw mounting hole, which is arranged on, lives
The top of consent, the stepped hole up big and down small with piston hole composition, the inner hole surface of the pressure regulating screw mounting hole are equipped with interior spiral shell
Line, lower end and the pressure regulating screw mounting hole of the pressure regulating screw are spirally connected, and the lower end of the pressure regulating screw is equipped with stretches for piston of dying
Into promotion hole；The overflow valve body is connected to the top of cylinder block, and overflow valve chamber, the pressure regulation are equipped with the overflow valve body
Screw is stretched into from the lower end of overflow valve chamber, and the overflow valve intracavitary is equipped with spring base, the upper end of the pressure regulating screw and spring base
Between be equipped with compression spring；The overflow spool is made of one piece by upper cylindrical section, conical section and lower cylindrical section, the lower cylindrical section
It is fixedly connected with spring base, the epimere of the overflow valve chamber is the spill cavity that diameter diminishes, the upper cylindrical section of the overflow spool
It is inserted in the top of conical section in spill cavity, the spill cavity is equipped with the return port of radial direction.
Wherein, the piston only is equipped with multi-ring annular seal groove, is embedded with the annular seal groove and piston hole
Flat type O-ring in sealing contact.
Wherein, the lower end of the overflow valve body is equipped with annular deep gouge, be provided with the annular deep gouge positioned at cylinder block and
Combination mat between overflow valve body.
Wherein, the pressure regulating screw is equipped with the O-ring being tightly connected with overflow valve chamber.
Further, distribution valve outlet hole, the Pneumatic valve connect hole and limit valve connects that hole is axially staggered to be arranged at cylinder block
On.
Preferably, distribution valve outlet hole, the Pneumatic valve connect hole and limit valve to connect hole be internal thread hole, the distributing valve
Exhausting-gas hole, Pneumatic valve connect hole and limit valve to connect the inner in hole be the thin footpath unthreaded hole connected with piston hole.
Further, the piston only is equipped with 3 circle annular seal grooves, wherein two circle annular seal grooves are arranged on annular and drive
The top of groove, another circle annular seal groove are arranged on the lower section of annular driver slot.
Wherein, the middle part of the overflow valve chamber is equipped with one section of internal thread segment, the top of the pressure regulating screw and internal thread segment
It is spirally connected.
The above-mentioned technical proposal of the utility model has the beneficial effect that：The structure of the utility model is small, to original gas control
The change of distributing valve is little, solves the problems, such as that hydraulic cylinder frequently rises cylinder.
Brief description of the drawings
Fig. 1 is the front view of the utility model embodiment one；
Fig. 2 be Fig. 1 in along A-A sectional view；
Fig. 3 be Fig. 2 in along B-B sectional view.
Description of reference numerals：
1st, overflow valve body；2nd, overflow spool；3rd, spring base；4th, compression spring；5th, pressure regulating screw；50th, hole is promoted；6th, combination mat；
7th, cylinder block；8th, die piston；80th, annular driver slot；9th, return spring；10th, flat type O-ring；12nd, O-ring；13rd, distributing valve
Exhausting-gas hole；14th, Pneumatic valve connects hole；15th, limit valve connects hole.
Embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing
And specific embodiment is described in detail.
As shown in Figure 1, the embodiment of the utility model provides a kind of dumper air control distribution valve overflow valve, including overflow
Valve body 1, overflow spool 2, pressure regulating screw 5, cylinder block 7 and piston 8 of dying, the cylinder block 7 are opened equipped with axially extending, upper end
Mouth, the piston hole of lower end closed, the cylinder block 7 are equipped with the distribution valve outlet hole for radially extending and being connected with piston hole
13rd, Pneumatic valve connects hole 14 and limit valve connects hole 15, and the piston 8 of dying is slidedly arranged in piston hole, and the piston 8 of dying includes living
Body and piston handle are filled in, the piston handle is shaped in the lower end of piston only and diameter is less than the diameter of piston only, institute
State piston only and be equipped with annular driver slot 80, the piston only is equipped with 3 circle annular seal grooves, wherein two circle ring packings
Groove is arranged on the top of annular driver slot, and another circle annular seal groove is in the lower section of annular driver slot, the annular seal groove
Embedded with the flat type O-ring 10 in sealing contact with piston hole.
The outer sheath of the piston handle is equipped with return spring 9, and the return spring 9 is installed in piston only and piston hole bottom
Between portion, the cylinder block 7 is equipped with pressure regulating screw mounting hole, the pressure regulating screw mounting hole be arranged on piston hole top, with
Piston hole forms up big and down small stepped hole, and the inner hole surface of the pressure regulating screw mounting hole is equipped with internal thread, the pressure regulation spiral shell
The lower end of nail 5 is spirally connected with pressure regulating screw mounting hole, and the lower end of the pressure regulating screw 5 is equipped with for the promotion hole that piston 8 is put in of dying
50。
The overflow valve body 1 is connected to the top of cylinder block 7, and overflow valve chamber, the pressure regulation are equipped with the overflow valve body 1
Screw 5 is stretched into from the lower end of overflow valve chamber, and the middle part of the overflow valve chamber is equipped with one section of internal thread segment, the pressure regulating screw 5
Top be spirally connected with internal thread segment.The pressure regulating screw 5 is equipped with the O-ring 12 being tightly connected with overflow valve chamber.
The overflow valve intracavitary is equipped with spring base 3, and compression spring 4 is equipped between the upper end of the pressure regulating screw 5 and spring base 3.
The overflow spool 2 is made of one piece by upper cylindrical section, conical section and lower cylindrical section, the lower cylindrical section and bullet
Spring abutment 3 is fixedly connected, and the epimere of the overflow valve chamber is the spill cavity that diameter diminishes, the upper cylindrical section of the overflow spool 2 and
The top of conical section is inserted in spill cavity, and the spill cavity is equipped with the return port 16 of radial direction.
The lower end of the overflow valve body 1 is equipped with annular deep gouge, is provided with the annular deep gouge positioned at cylinder block 7 and overflow
Combination mat 6 between valve body 1.
In the present embodiment, distribution valve outlet hole 13, the Pneumatic valve connect hole 14 and limit valve connects that hole 15 is axially staggered to be set
It is placed in cylinder block 7.Distribution valve outlet hole 13, the Pneumatic valve connect hole 14 and limit valve to connect hole 15 be internal thread hole, it is described
Distribution valve outlet hole 13, Pneumatic valve connect hole 14 and limit valve to connect the inner in hole 15 be the thin footpath unthreaded hole connected with piston hole.
The operation principle of the utility model is：Piston motion of dying is promoted using oil pressure relief, cuts off source of the gas, gas control distribution
Independently selection returns to middle off-position, self-unloading vehicle hydraulic system pressure back to zero to valve.
The above is the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of principle described in the utility model is not departed from, some improvements and modifications can also be made, these improvement
The scope of protection of the utility model is also should be regarded as with retouching.
Claims (8)
- A kind of 1. dumper air control distribution valve overflow valve, it is characterised in that including overflow valve body, overflow spool, pressure regulating screw, Cylinder block and piston of dying, the cylinder block are equipped with axially extending, upper end opening, the piston hole of lower end closed, the cylinder Body is equipped with the distribution valve outlet hole for radially extending and being connected with piston hole, Pneumatic valve connects hole and limit valve connects hole, described disconnected Gas piston is slidedly arranged in piston hole, and the piston of dying includes piston only and piston handle, and the piston handle is shaped in work Fill in the lower end of body and diameter is less than the diameter of piston only, the piston only is equipped with annular driver slot, the piston handle Outer sheath return spring is housed, the return spring is installed between piston only and piston hole bottom, in the cylinder block Equipped with pressure regulating screw mounting hole, the pressure regulating screw mounting hole forms up big and down small arranged on the top of piston hole, with piston hole Stepped hole, the inner hole surface of the pressure regulating screw mounting hole are equipped with internal thread, and lower end and the pressure regulating screw of the pressure regulating screw are pacified Dress hole is spirally connected, and the lower end of the pressure regulating screw is equipped with for the promotion hole that piston is put in of dying；The overflow valve body is connected to cylinder The top of body, the overflow valve body is interior to be equipped with overflow valve chamber, and the pressure regulating screw is stretched into from the lower end of overflow valve chamber, the overflow Spring base is equipped with valve chamber, compression spring is equipped between the upper end of the pressure regulating screw and spring base；The overflow spool is by upper cylinder Section, conical section and lower cylindrical section are made of one piece, and the lower cylindrical section is fixedly connected with spring base, the overflow valve chamber it is upper The spill cavity that section diminishes for diameter, the upper cylindrical section of the overflow spool and the top of conical section are inserted in spill cavity, described Spill cavity is equipped with the return port of radial direction.
- 2. dumper air control distribution valve overflow valve according to claim 1, it is characterised in that set on the piston only There is multi-ring annular seal groove, the flat type O-ring in sealing contact with piston hole is embedded with the annular seal groove.
- 3. dumper air control distribution valve overflow valve according to claim 1, it is characterised in that under the overflow valve body End is equipped with annular deep gouge, the combination mat being provided with the annular deep gouge between cylinder block and overflow valve body.
- 4. dumper air control distribution valve overflow valve according to claim 1, it is characterised in that set on the pressure regulating screw There is the O-ring being tightly connected with overflow valve chamber.
- 5. dumper air control distribution valve overflow valve according to claim 1, it is characterised in that the distribution valve exhaust Hole, Pneumatic valve connect hole and limit valve connects that hole is axially staggered to be arranged in cylinder block.
- 6. dumper air control distribution valve overflow valve according to claim 1 or 5, it is characterised in that the distributing valve row Stomata, Pneumatic valve connect hole and limit valve to connect hole be internal thread hole, the distribution valve outlet hole, Pneumatic valve connects hole and limit valve connects The inner in hole is the thin footpath unthreaded hole connected with piston hole.
- 7. dumper air control distribution valve overflow valve according to claim 2, it is characterised in that set on the piston only There are 3 circle annular seal grooves, wherein two circle annular seal grooves are arranged on the top of annular driver slot, another circle annular seal groove is arranged on ring The lower section of shape driver slot.
- 8. dumper air control distribution valve overflow valve according to claim 1, it is characterised in that in the overflow valve chamber Portion is equipped with one section of internal thread segment, and top and the internal thread segment of the pressure regulating screw are spirally connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721217375.9U CN207229854U (en) | 2017-09-20 | 2017-09-20 | Dumper air control distribution valve overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721217375.9U CN207229854U (en) | 2017-09-20 | 2017-09-20 | Dumper air control distribution valve overflow valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207229854U true CN207229854U (en) | 2018-04-13 |
Family
ID=61863520
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721217375.9U Expired - Fee Related CN207229854U (en) | 2017-09-20 | 2017-09-20 | Dumper air control distribution valve overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207229854U (en) |
-
2017
- 2017-09-20 CN CN201721217375.9U patent/CN207229854U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201875226U (en) | Sequence valve | |
| CN208651309U (en) | Pneumatic control proportioning throttling hydraulicdirectional control valve | |
| CN207229854U (en) | Dumper air control distribution valve overflow valve | |
| CN203743499U (en) | Slow-descending air-control distribution valve | |
| CN205036948U (en) | Dead stop valve of anti -sticking | |
| CN206988196U (en) | A kind of new high-lift hydraulic valve | |
| CN201129393Y (en) | Clutch smooth and steady jointing apparatus | |
| CN204938830U (en) | A kind of Quick lifting device of hydraulic jack | |
| CN207827749U (en) | A kind of hydraulic jack of fast lifting | |
| CN203322327U (en) | Sealed type hand wheel driving plate valve | |
| CN203856791U (en) | Safety valve used for multi-way valve | |
| CN201080933Y (en) | Double-acting hydraulic cylinder with limit function | |
| CN202156400U (en) | Brake system of forklift | |
| CN206770682U (en) | A kind of Slow Close Valve | |
| CN204921544U (en) | Big oil filling riser lift cylinder hydraulic system | |
| CN207333505U (en) | A kind of Retarder with hydraulic oil regulating device | |
| CN104879543A (en) | Automatic-control constant-pressure throttling valve | |
| CN207349058U (en) | A kind of valve body structure of air-driven hydraulic pump relief valve | |
| CN102444639A (en) | Pneumatic reversing valve | |
| CN202418071U (en) | Pneumatic control reversing valve and application thereof | |
| CN207122649U (en) | A kind of high-leak tightness valve | |
| CN203322284U (en) | High-water-pressure shut-off valve with graphite ring | |
| CN203322409U (en) | Overflow valve with detachable screw hole | |
| CN216842456U (en) | Double-sided hydraulic lifting valve for cylinder | |
| CN2455997Y (en) | Dosing valve for lubricating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180413 Termination date: 20180920 |