CN201173324Y - Pressure regulating unloading valve - Google Patents
Pressure regulating unloading valve Download PDFInfo
- Publication number
- CN201173324Y CN201173324Y CNU2008200823189U CN200820082318U CN201173324Y CN 201173324 Y CN201173324 Y CN 201173324Y CN U2008200823189 U CNU2008200823189 U CN U2008200823189U CN 200820082318 U CN200820082318 U CN 200820082318U CN 201173324 Y CN201173324 Y CN 201173324Y
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- China
- Prior art keywords
- valve rod
- valve
- pressure
- fixed base
- regulating sleeve
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- Expired - Fee Related
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Abstract
The utility model relates to a pressure regulating and unloading valve which comprises a fixed seat (1), a valve rod (2) and a vale core (3). The valve rod (2) is arranged in an inner hole (11) of the fixed seat, and is tightly matched with the inner hole (11); the lower part of the valve rod (2) extends out of the fixed seat (1) and is connected and fixed with the valve core (3); a pressure regulating sleeve (4) is connected with the upper part of the fixed part (1) through screw threads; a pressure regulating spring (5) and a spring support (6) are arranged in the pressure regulating sleeve (4); the pressure regulating spring (5) is supported between the upper inner walls of the spring support (6) and the pressure regulating sleeve (4); the valve rod (2) and the valve core (3) are integrated into a whole; a connecting part (7) is arranged between the upper part of the valve rod (2) and the spring support (6); a thread hole (71) is arranged on the lower head face of the connecting part (7); the upper end of the valve rod (2) is connected with the thread hole (71) through screw threads, and the spring support (6) is pressed at the top of the connecting part (7). Because the valve rod and the valve core are integrated into a whole, and a screwed connection structure is not arranged between the valve rod and the valve core, the installing coaxiality of the valve rod and the valve core is only ensured by an axle and a hole plane, thereby effectively ensuring good coaxiality of the valve rod and the valve core.
Description
Technical field
The utility model relates to a kind of pressure regulation unloading valve.
Background technique
The pressure regulation unloading valve generally is used for wash machine and pump series products, and it is to guarantee one of the water pump proper functioning very critical component.It can set up the working pressure of water pump, when pump outlet is closed, can the feed water pump off-load make water pump be in the low-pressure energy-saving state simultaneously.If there is not the pressure regulation unloading valve, and being in high pressure, water pump do not have under the water outlet situation, water pump will be blasted, be ftractureed, and causes casualty accident, so it also is a safety overflow valve.The pressure regulation unloading valve there is certain requirement, promptly requires interior each critical component of member that good coaxality must be arranged, but also will guarantee after the mutual assembly of each parts good coaxality is arranged also.
It is that the Chinese utility model patent " pressure regulation unloading valve " of ZL200420026302.8 (notification number is CN2689009Y) has disclosed a kind of like this pressure regulation unloading valve that one patent No. is arranged, comprise valve rod, spool, described valve rod places in the fixed base, the bottom of valve rod stretches out fixed base and spool is connected and fixed, spool is made up of valve core case and steel ball, valve core case is connected with threaded stem, and the part of steel ball remains in the valve core case, the top of the fixed base pressure-regulating sleeve that has been threaded, pressure-regulating sleeve is built-in with pressure adjusting spring, the lower end of pressure adjusting spring is pressed on the latch bracket, and latch bracket is pressed in the top of valve rod; It is installed together by built-in pressure regulation valve rod assembly and external stability seat, can guarantee coaxality, thereby reaches performance requirements such as pressure regulation is level and smooth, pressure stability, off-load sensitivity, pressure limiting.
The valve rod assembly that relates in the aforementioned patent is made up of valve core case, valve rod and valve ball, wherein valve ball is embedded in valve core case, and valve core case and valve rod are to be threaded togather, there is following defective in this structure: 1, because must guarantee the coaxality of valve rod assembly by good technology in the pressure regulation unloading valve, being threaded as everyone knows to guarantee between the two well coaxality, so coaxality can not be guaranteed between valve ball, valve core case and the valve rod.
2 but because valve ball is embedded in valve core case, and after long-time the use, valve ball breaks away from from valve core case easily, though adopt steel ball can occur valve ball easily and damage the facility phenomenon by the hardness of valve ball as valve ball.
3, since valve core case and valve rod for being threaded, so the screw section diameter on the valve core case is littler than valve rod, promptly the rigidity on valve core case top and intensity are little, so pressure regulation unloading valve integral rigidity and intensity are less.
4, being threaded between valve core case and the valve rod is to adopt screw-driver to tighten assembling, and the torque force that screw-driver improves is less, so the installation and maintenance inconvenience.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of pressure regulation unloading valve that guarantees that its inner each parts have good coaxality is provided at above-mentioned prior art present situation, and it also has integral rigidity and intensity height, advantage fragile and not easy to assembly.
The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of pressure regulation unloading valve, comprise fixed base, valve rod, spool, described valve rod place fixed base endoporus and with the endoporus close-fitting, the bottom of valve rod stretches out fixed base and spool is connected and fixed, the top of the fixed base pressure-regulating sleeve that has been threaded, be provided with pressure adjusting spring and latch bracket in the pressure-regulating sleeve, described pressure adjusting spring is supported between the last inwall of latch bracket and pressure-regulating sleeve, it is characterized in that: described valve rod and spool are integral piece, and between valve rod top and latch bracket, be provided with a connection piece, the link lower end surface is provided with tapped hole, described valve rod upper end is threaded with this tapped hole, and described latch bracket then is pressed in the top of link.
For ease of assembly, above-mentioned valve rod is by the endoporus close-fitting of valve stem casing and fixed base, and described valve stem casing then is set on the valve rod, and the valve stem casing upper-end surface contacts with the link lower end surface, have interior omoplate in the valve stem casing, the valve rod corresponding position has the outer omoplate that matches with interior omoplate.Can adopt the existing fixed stand structure like this, need not fixed seat structure is changed.If there is not valve stem casing certainly, only need corresponding the reducing of diameter with the endoporus of fixed base, just be reduced to enough valve rod insertions and get final product.
For under unloading condition, can fast lifting valve rod groove spring direction move, have an annular gap between the valve rod of above-mentioned valve stem casing bottom and the endoporus of fixed base, corresponding annular gap place is provided with some apertures on the sidewall of fixed base.During off-load, water enters in the annular space and effect and valve stem casing from aperture, plays the effect of service hoisting valve rod.
Above-mentioned pressure-regulating sleeve is threaded with the internal thread on fixed base endoporus top by the outside thread of its underpart.
A locking nut also has been threaded on the outside thread of above-mentioned pressure-regulating sleeve.Locking nut plays the effect of further location pressure-regulating sleeve, and to eliminate the gap between pressure-regulating sleeve outside thread and the fixed base internal thread, locking nut has also suppressed because the pressure shake that the gap that is threaded causes and unstable simultaneously.
Above-mentioned link upper-end surface is a spherical, and described latch bracket lower end surface is the taper concave surface, and described spherical contacts with the taper concave surface.Cambered surface contact is played certain for the aligning effect, guarantees that valve rod moves steadily.
For ease of turning pressure-regulating sleeve, above-mentioned pressure-regulating sleeve top is fixed with an adjusting pressuring handle.
Compared with prior art, advantage of the present utility model is:
1, described valve rod and spool are integral piece, and promptly spool has adopted non-steel ball monomer structure, cause the possibility that facility damage thereby evaded in original pressure regulation unloading valve owing to steel ball comes off, and increase the service life.
2, described valve rod and spool are integral piece, between valve rod top and latch bracket, be provided with a connection piece, link is connected with threaded stem, this is threaded and only plays the fastening effect of installing, importantly there is not screw connection structure between valve rod and the spool, the coaxality that this valve rod, spool are installed only depends on axle, plane, hole to guarantee, therefore effectively guarantees valve rod and the good coaxality of spool.
3, because valve rod and spool are integral piece, its diameter is thicker than the screw section on valve core case top in the original structure, so this pressure regulation unloading valve has more firm rigidity and intensity.
4, being connected between this structure valve rod and the link can adopt Wrench to install, and assembles easy to maintenance.
Description of drawings
Fig. 1 is the utility model embodiment's a structure sectional view;
Fig. 2 is the structure sectional view of the utility model embodiment under user mode.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
Be illustrated in figure 1 as of the present utility model should preferred embodiment.
A kind of pressure regulation unloading valve, comprise fixed base 1, valve rod 2, spool 3, described valve rod 2 place fixed base 1 endoporus 11 and with endoporus 11 close-fittings, valve rod 2 is by endoporus 11 close-fittings of valve stem casing 8 with fixed base 1,8 of described valve stem casings are set on the valve rod 2, be provided with seal ring between valve stem casing 8 and the valve rod 2, has interior omoplate 81 in the valve stem casing 8, valve rod 2 corresponding positions have the outer omoplate 21 that matches with interior omoplate 81, be provided with seal ring between valve stem casing 8 and the endoporus 11, valve stem casing 8 can move up and down in endoporus 11, the bottom of valve rod 2 is stretched out fixed base 1 and is connected and fixed with spool 3, described valve rod 2 and spool 3 are integral piece, and the top of spool 3 has the annular convex shoulder 31 of diameter greater than valve rod 2.
The top of fixed base 1 pressure-regulating sleeve 4 that has been threaded, pressure-regulating sleeve 4 is threaded with the internal thread on endoporus 11 tops by the outside thread of its underpart, be provided with pressure adjusting spring 5 and latch bracket 6 in the pressure-regulating sleeve 4, described pressure adjusting spring 5 is supported between the last inwall of latch bracket 6 and pressure-regulating sleeve 4, the locking nut 9 that also has been threaded on the outside thread of pressure-regulating sleeve 4, pressure-regulating sleeve 4 tops are fixed with an adjusting pressuring handle 10.
Between valve rod 2 tops and latch bracket 6, be provided with a connection piece 7, link 7 lower end surfaces are provided with tapped hole 71, described valve rod 2 upper ends are threaded with this tapped hole 71, link 7 upper-end surfaces are spherical, described latch bracket 6 lower end surfaces are taper concave surface 61, described spherical contacts with taper concave surface 61, and described link 7 lower end surfaces contact with valve stem casing 8 upper-end surfaces
Have an annular gap 12 between the endoporus 11 of the valve rod 2 of valve stem casing 8 bottoms and fixed base 1, corresponding annular gap 12 places are provided with some apertures 13 on the sidewall of fixed base 1.
The working principle of pressure regulation unloading valve is as follows.
As shown in Figure 2, fixed base 1 with the pressure regulation unloading valve during work is threaded in the water pump, eliminate pressure regulation valve pocket 14 between fixed base 1 bottom and the water pump endoporus, water pump has an orthogonal high pressure water chamber 15 and a low pressure water cavity 16, the inlet of high pressure water chamber 15 is provided with an one-way valve 17, the inlet of low pressure water cavity 16 is provided with pressuring adjusting valve base 18, and pressuring adjusting valve base 18 matches with spool 3.
The voltage-regulation principle of pressure regulation unloading valve: during the water pump proper functioning, valve rod 2 always is subjected to the effect of two power, one is that pressure adjusting spring 5 produces a downward active force to it when being compressed, another is the active force that makes progress that high pressure water produces it, and these two active forces equal and opposite in direction always, direction is opposite, makes valve rod 2 keep balance.When downward turn adjusting pressuring handle 10, pressure adjusting spring 5 is gradually reduced, the compressive force that valve rod 2 is subjected to pressure adjusting spring 5 is becoming big gradually, this moment, imbalance will take place in valve rod 2, and the pressure of the water in the pressure regulation valve pocket 14 will raise gradually, this high pressure water also increases the active force of valve rod 2 thereupon, finally reaches balance.Otherwise, unscrewing adjusting pressuring handle 10, the pressure of water pump will reduce.
The off-load principle of pressure regulation unloading valve: during the water pump proper functioning, valve rod 2 always is in state of equilibrium under the effect of two power.When pump outlet is closed, when being the anhydrous outflow of high pressure water chamber 15, nonreturn valve core 2 will be closed, will produce a hydraulic pressure higher in the high pressure water chamber 15 at this moment than normal operating pressure, this higher hydraulic pressure will destroy the balance of valve rod 2, makes it to produce a motion that makes progress, and the valve face of pulling valve rod 2 breaks away from pressuring adjusting valve base 18, the high pressure water that reaches in the pressure regulation valve pocket 14 connects with low-pressure water in the low pressure water cavity 16, water pump is under the low-pressure state moves.
Claims (7)
1, a kind of pressure regulation unloading valve, comprise fixed base (1), valve rod (2), spool (3), described valve rod (2) place fixed base endoporus (11) and with endoporus (11) close-fitting, the bottom of valve rod (2) is stretched out fixed base (1) and is connected and fixed with spool (3), the top of fixed base (1) pressure-regulating sleeve (4) that has been threaded, be provided with pressure adjusting spring (5) and latch bracket (6) in the pressure-regulating sleeve (4), described pressure adjusting spring (5) is supported between the last inwall of latch bracket (6) and pressure-regulating sleeve (4), it is characterized in that: described valve rod (2) and spool (3) are integral piece, and between valve rod (2) top and latch bracket (6), be provided with a connection piece (7), link (7) lower end surface is provided with tapped hole (71), described valve rod (2) upper end is threaded with this tapped hole (71), and described latch bracket (6) then is pressed in the top of link (7).
2, pressure regulation unloading valve according to claim 1, it is characterized in that: described valve rod (2) is by endoporus (11) close-fitting of valve stem casing (8) with fixed base (1), described valve stem casing (8) then is set on the valve rod (2), valve stem casing (8) upper-end surface contacts with link (7) lower end surface, have interior omoplate (81) in the valve stem casing (8), valve rod (2) corresponding position has the outer omoplate (21) that matches with interior omoplate (81).
3, pressure regulation unloading valve according to claim 2, it is characterized in that: have an annular gap (12) between the valve rod (2) of described valve stem casing (8) bottom and the endoporus (11) of fixed base (1), corresponding annular gap (12) locates to be provided with some apertures (13) on the sidewall of fixed base (1).
4, according to claim 1,2 or 3 described pressure regulation unloading valves, it is characterized in that: described pressure-regulating sleeve (4) is threaded with the internal thread on endoporus (11) top by the outside thread of its underpart.
5, pressure regulation unloading valve according to claim 4 is characterized in that: a locking nut (9) also has been threaded on the outside thread of pressure-regulating sleeve (4).
6, pressure regulation unloading valve according to claim 1 is characterized in that: described link (7) upper-end surface is a spherical, and described latch bracket (6) lower end surface is taper concave surface (61), and described spherical contacts with taper concave surface (61).
7, pressure regulation unloading valve according to claim 2 is characterized in that: described pressure-regulating sleeve (4) top is fixed with an adjusting pressuring handle (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200823189U CN201173324Y (en) | 2008-01-15 | 2008-01-15 | Pressure regulating unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200823189U CN201173324Y (en) | 2008-01-15 | 2008-01-15 | Pressure regulating unloading valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173324Y true CN201173324Y (en) | 2008-12-31 |
Family
ID=40200445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200823189U Expired - Fee Related CN201173324Y (en) | 2008-01-15 | 2008-01-15 | Pressure regulating unloading valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173324Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454734A (en) * | 2014-12-01 | 2015-03-25 | 天津市通洁高压泵制造有限公司 | Pressure-regulating overflow valve |
| CN111271468A (en) * | 2020-02-29 | 2020-06-12 | 四川省犍为峨山阀门有限责任公司 | Working valve for community |
-
2008
- 2008-01-15 CN CNU2008200823189U patent/CN201173324Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454734A (en) * | 2014-12-01 | 2015-03-25 | 天津市通洁高压泵制造有限公司 | Pressure-regulating overflow valve |
| CN104454734B (en) * | 2014-12-01 | 2016-08-17 | 天津市通洁高压泵制造有限公司 | A kind of pressure adjustment relief valve |
| CN111271468A (en) * | 2020-02-29 | 2020-06-12 | 四川省犍为峨山阀门有限责任公司 | Working valve for community |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20170115 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |