CN102818046A - Reducing valve, roadheader water system and roadheader - Google Patents
Reducing valve, roadheader water system and roadheader Download PDFInfo
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- CN102818046A CN102818046A CN2012103156972A CN201210315697A CN102818046A CN 102818046 A CN102818046 A CN 102818046A CN 2012103156972 A CN2012103156972 A CN 2012103156972A CN 201210315697 A CN201210315697 A CN 201210315697A CN 102818046 A CN102818046 A CN 102818046A
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Abstract
The invention provides a reducing valve which comprises a valve body, an adjusting device, a pilot valve and a main valve. The pilot valve comprises a pilot spool and a valve seat which are located in the valve body. The pilot spool can open or close to match with the valve seat. The adjusting device is mounted on the valve body and connected with the pilot spool. The main valve comprises a spool and a valve bush, the spool is slidably disposed in the valve bush, the valve bush is fixedly connected with the valve body, and a spool return spring is disposed between the spool and the valve seat. An outlet is axially arranged on the valve bush, an inlet is radially arranged on the valve bush, and the inlet and the outlet are communicated with each other through a valve opening. At least one overflow port is arranged on the valve bush, and communication between the overflow port and the outlet is controlled by opening and closing of the pilot spool and the valve seat. The invention further provides a roadheader water system and a roadheader. The reducing valve is low in cost and suitable for mass flow water systems, can protect other related parts, has stable outlet pressure, and has the functions of pressure reducing and overflowing.
Description
Technical field
The present invention relates to engineering machinery field, more specifically, relate to a kind of reduction valve, development machine water system and development machine.
Background technique
At present, the development machine water system adopts direct-acting type water reduction valve shown in Figure 1 usually, and the direction of arrow is water (flow) direction among Fig. 1, and in order to prevent corrosion, structural material is a copper usually.Press water is got into by water intake, overcomes spring force and opens poppet valve core, and press water produces pressure drop through the cone valve mouth, thereby reduces the pressure of water outlet.
In the correlation technique, the water system that above-mentioned direct-acting type water reduction valve is used for development machine is arranged, to realize depositing dust and the system cools of development machine in driving.But in use, the inventor finds to exist at least in the correlation technique following problem:
1. said direct-acting type water reduction valve does not have relief function, when nozzle is blocked or after ball valve closed, pipeline inner pressure equaled water intake pressure, because each mineral water is pressed in 3～8MPa scope, when mineral water is pressed element such as fragile floating seal and cooler when higher.
2. the water outlet pressure stability is poor, and the water pressure fluctuations scope is big, is prone to cause pipeline vibration, and joint is loosening.
3. when the water system flow was big, the dynamic characteristic of water outlet was relatively poor.
Summary of the invention
Technical problem to be solved by this invention is; A kind of new reduction valve is provided, and it adopts plug-in type structure, cost low, and outlet pressure is stable when being used for big flow water system; Not only other parts to the development machine water system play a protective role, and also have decompression, relief function simultaneously.
In view of this; The invention provides a kind of reduction valve, comprise valve body, controlling device, pilot valve and main valve, said pilot valve comprises pilot valve core, valve seat; Said pilot valve core and valve seat are positioned at said valve body; Said pilot valve core can cooperate with said valve seat with opening or close, and said controlling device is installed on the said valve body and with said pilot valve core and is connected, and is used to regulate the pretightening force of said pilot valve core and said valve seat; Said main valve comprises spool and valve pocket, and said spool is mounted slidably in said valve pocket, and said valve pocket is fixedly connected with said valve body, is provided with valve core reseting spring between said spool and the said valve seat; Said valve pocket axially be provided with outlet, said valve pocket radially be provided with import, said import is connected through valve port with said outlet, the area of passage that changes said valve port can be regulated the pressure of said outlet; Also be provided with at least one flow-off on the said valve pocket, open or close the on-off of realizing between said flow-off and said outlet through said pilot valve core and said valve seat.
In this technological scheme, reduction valve adopts the mode of pilot valve and main valve combination, is applicable to the development machine water system of big flow; Flow-off is set, makes it have the function of overflow, valve port is set; Be convenient to adjust mouth pressure; Make it have pressure-reducing function, having solved the water reduction valve does not simultaneously have relief function and outlet pressure problem of unstable, has guaranteed the working efficiency of reduction valve.
In technique scheme, preferably, said main valve is a sliding valve structure; One end of said valve pocket is positioned at said valve body and is threaded with said valve body, said poppet shaft to an end be provided with first chamber, said valve core reseting spring is positioned at said first chamber; Said poppet shaft to the other end be provided with second chamber; Said second chamber is communicated with said outlet, is provided with first through hole between said first chamber and said second chamber, and said first through hole is communicated with said first chamber and said second chamber.
In this technological scheme, second chamber is communicated with first chamber through first through hole, and is communicated with outlet; When the reduction valve outlet pressure increased, the current that flow to outlet through second chamber can flow to first chamber through first through hole, like this; Reduce outlet pressure, guaranteed reduction valve outlet pressure stability.
In technique scheme; Preferably, said valve core outer surface is provided with annular deep gouge, and said spool radially is provided with second through hole; Said second through hole is communicated with said second chamber; Said valve pocket radially be provided with the third through-hole that is communicated with said import, said second through hole and said third through-hole are connected through said annular deep gouge, then said second through hole, said third through-hole and said annular deep gouge are formed said valve port.
In this technological scheme; When reduction valve was used for big flow water system, the restriction of being made up of second through hole, third through-hole and annular deep gouge diminished, increases the decompression amount, and the water flow through outlet is reduced; Reduce outlet pressure, guaranteed the stability of reduction valve outlet pressure.
In technique scheme, preferably, be provided with back-up ring between said spool and the said valve pocket, said back-up ring can stop said spool to skid off said valve pocket.
In this technological scheme; Owing to be provided with valve core reseting spring between spool and the valve seat, this valve core reseting spring has certain pretightening force, this pretightening force can make spool skid off valve pocket when installing; Being provided with of back-up ring stoped spool to skid off valve pocket, guaranteed that main valve can proper functioning.
In technique scheme; Preferably; Said valve seat axially be provided with the 3rd chamber and fifth hole, said the 3rd chamber is communicated with said first chamber through said fifth hole, said valve seat radially be provided with fourth hole; What said valve pocket was positioned at said valve piece one end outer surface axially is provided with at least one groove, and said fourth hole is communicated with said flow-off through said groove; Said pilot valve core is installed between said fourth hole and said the 3rd chamber, opening or cooperate the on-off of realizing said fourth hole and said the 3rd chamber with closing through said pilot valve core and said valve seat.
In this technological scheme; The 3rd chamber and the fifth hole of the axial setting of valve seat; And the 3rd chamber is communicated with first chamber through fifth hole, the groove of the fourth hole that radially is provided with of valve seat and the axial setting of valve pocket, and fourth hole is communicated with flow-off through groove.Such structural design has guaranteed being communicated with between pilot valve and the main valve, and has constituted overflow ducts.When the inlet pressure of reduction valve and/or outlet pressure surpass setting value; Flow to the current of outlet through valve port, second chamber through import; Wherein can some through first through hole, first chamber, fifth hole, the 3rd chamber; Promote the pilot valve core motion after fourth hole, groove, flow-off flow to outlet at last; The decompression and the relief function of reduction valve have been realized.
In technique scheme; Preferably; Said controlling device comprises adjusting screw rod, locking nut and Regulation spring, and said adjusting screw rod is screwed onto on the said valve body, and said Regulation spring is pressed on the said pilot valve core; Said locking nut and said adjusting screw rod bolt can be locked at said adjusting screw rod on the said valve body.
In this technological scheme; Adjusting screw rod can change the decrement of Regulation spring, thereby changes the pressure of reduction valve outlet, and locking nut can be locked at the adjusting screw rod of having adjusted on the valve body; Decrement to guarantee Regulation spring is constant, thereby the setting value that has guaranteed outlet pressure is constant.
In technique scheme, preferably, said pilot valve can be cone valve or guiding valve or ball valve.
In this technological scheme, pilot valve can be the valve of different structure, and the valve that can select appropriate configuration according to different situations is as pilot valve.
In technique scheme, preferably, said pilot valve and main valve are processed by stainless steel or copper or Cuprum alloy or anticorrosive; Said valve body is processed by anticorrosive.
In this technological scheme; It is good that stainless steel material has processibility; Corrosion resistance is good, is fit to advantages such as various condition of water quality, and copper, Cuprum alloy, that anticorrosive has corrosion resistance too is good; Be fit to advantages such as various condition of water quality, so can select suitable material manufacture pilot valve and main valve for use according to the different working situation; Valve body adopts the anticorrosive that can satisfy processibility to process, and has further guaranteed the anticorrosive property of said reduction valve.
The present invention also provides a kind of development machine water system; Comprise the valve piece; This development machine water system also comprises the described reduction valve of above-mentioned each technological scheme, and the outer installment of said relief valve body has screw thread, and said reduction valve is fixedly connected with said valve piece through the outside screw thread of said valve body.
In this technological scheme, reduction valve can adopt cartridge valve formula structure and valve piece plug-in mounting to be connected, and this Placement is simple, installs, convenient disassembly is easy.
In addition, the present invention also provides a kind of development machine, and this development machine comprises the described development machine water system of technique scheme; Obviously; This development machine has whole beneficial effects of above-mentioned development machine water system, repeat no more at this, but its application all should be within protection scope of the present invention.
In sum, the invention provides a kind of reduction valve and adopt guide's overflow mode, be applicable to big flow water system, outlet pressure is stable, and not only other parts to the development machine water system play a protective role, and it is low also to have decompression, relief function and cost simultaneously.The present invention also provides a kind of development machine water system and development machine.
Description of drawings
Fig. 1 is the cross-sectional view of reduction valve in the existing technology;
Fig. 2 is the cross-sectional view according to reduction valve one embodiment of the present invention;
Cross-sectional view when Fig. 3 is the work of the described reduction valve of Fig. 2;
Fig. 4 is that the described reduction valve of figure is connected schematic representation with the valve piece;
Fig. 5 looks schematic representation for the right side of structure shown in Figure 4.
Wherein, the corresponding relation between reference character and the component names is among Fig. 1 to Fig. 5:
1 adjusting screw rod, 2 locking nuts, 3 first seal rings, 4 valve bodies, 5 Regulation springs,
6 pilot valve cores, 7 the 3rd back-up rings, 8 second seal rings, 9 the 3rd seal rings,
10 valve seats, 101 fifth holes, 102 the 3rd chambeies, 103 fourth holes,
11 back-up rings, 12 valve core reseting springs, 13 the 4th back-up rings, 14 the 4th seal rings,
15 the 5th seal rings, 16 the 5th back-up rings, 17 spools, 171 second through holes, 172 annular deep gouges,
173 first through holes, 174 first chambeies, 175 second chambeies, 18 valve pockets, 181 third through-holes,
182 grooves, 20 imports, 21 outlets, 22 flow-offs.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present invention, feature and advantage, the present invention is further described in detail below in conjunction with accompanying drawing and embodiment.Need to prove that under the situation of not conflicting, the application's embodiment and the characteristic among the embodiment can make up each other.
A lot of details have been set forth in the following description so that make much of the present invention; But; The present invention can also adopt other to be different from mode described here and implement, and therefore, protection scope of the present invention does not receive the restriction of following disclosed specific embodiment.
Fig. 2 is the cross-sectional view according to reduction valve one embodiment of the present invention.
As shown in Figure 2ly the invention provides a kind of reduction valve; Comprise valve body 4, controlling device, pilot valve and main valve; Pilot valve comprises pilot valve core 6 and valve seat 10, and pilot valve core 6 is positioned at valve body 4 with valve seat 10, and pilot valve core 6 can cooperate with valve seat 10 with opening or close; Controlling device is installed on the valve body 4 and with pilot valve core 6 and is connected, and is used to regulate the pretightening force of pilot valve core 6 and valve seat 10; Main valve comprises spool 17 and valve pocket 18, and spool 17 is mounted slidably in valve pocket 18, and valve pocket 18 is fixedly connected with valve body 4, is provided with valve core reseting spring 12 between spool 17 and the valve seat 10; Valve pocket 18 axially be provided with outlet 21, valve pocket 18 radially be provided with import 20, import 20 and outlet 21 are connected through valve port, the area of passage that changes valve port can be regulated and export 21 pressure; Also be provided with at least one flow-off 22 on the valve pocket 18, open or close the on-off of realizing 21 of flow-off 22 and outlets through 10 of pilot valve core 6 and valve seats.
In this technological scheme, reduction valve adopts the mode of pilot valve and main valve combination, is applicable to the development machine water system of big flow; Flow-off 22 is set, makes it have the function of overflow, valve port is set; Be convenient to regulate outlet 21 pressure; Make it have pressure-reducing function, solved the problem that the water reduction valve does not have relief function and exports 21 pressure stabilities simultaneously, guaranteed the working efficiency of reduction valve.
In the above-described embodiments, main valve is a sliding valve structure, and an end of valve pocket 18 is positioned at valve body 4 and is threaded with valve body 4; Spool 17 axial ends are provided with first chamber 174; Valve core reseting spring 12 is positioned at first chamber 174, and the spool 17 axial the other ends are provided with 175, the second chambeies 175, second chamber and are communicated with outlet 21; Be provided with first through hole, 173, the first through holes 173 between first chamber 174 and second chamber 175 and be communicated with first chamber 174 and second chamber 175.
In this technological scheme; Second chamber 175 is communicated with first chamber 174 through first through hole 173, and is communicated with outlet 21, when reduction valve exports the increase of 21 pressure; The current that flow to outlet 21 through second chamber 175 can flow to first chamber 174 through first through hole 173; Like this, reduced outlet 21 pressure, guaranteed that reduction valve exports 21 pressure stabilities.
In the above-described embodiments; Preferably, spool 17 outer surfaces are provided with annular deep gouge 172, and spool 17 radially is provided with second through hole 171; Second through hole 171 is communicated with second chamber 175; Third through-hole 181, the second through holes 171 that radially being provided with of valve pocket 18 is communicated with import 20 are connected through annular deep gouge 172 with third through-hole 181, and then second through hole 171, third through-hole 181 and annular deep gouge 172 are formed said valve port.
In this technological scheme; When reduction valve is used for big flow water system; The restriction of being made up of second through hole 171, third through-hole 181 and annular deep gouge 172 diminishes, increases the decompression amount; Make water flow minimizing, reduce outlet 21 pressure, guaranteed that reduction valve exports the stability of 21 pressure through exporting 21.
In the above-described embodiments, be provided with back-up ring 11 between spool 17 and the valve pocket 18, back-up ring 11 can stop spool 17 to skid off valve pocket 18.
In this technological scheme; Owing to be provided with valve core reseting spring 12 between spool 17 and the valve seat 10; This valve core reseting spring 12 has certain pretightening force when installing; This pretightening force can make spool 17 skid off valve pocket 18, and being provided with of back-up ring 11 stoped spool 17 to skid off valve pocket 18, guarantees that main valve can proper functioning.
In the above-described embodiments; Valve seat 10 axially be provided with the 3rd chamber 102 and fifth hole 101; The 3rd chamber 102 is communicated with first chamber 174 through five-way 101 holes; Valve seat 10 radially be provided with fourth hole 103, what valve pocket 18 was positioned at valve piece 4 one end outer surfaces axially is provided with at least one groove 182, fourth hole 103 is communicated with flow-off 22 through groove 182; Pilot valve core 6 is installed between fourth hole 103 and the 3rd chamber 102, opening or cooperate the on-off of realizing fourth hole 103 and the 3rd chamber 102 with closing through pilot valve core 6 and valve seat 10.
In this technological scheme; The 3rd chamber 102 and fifth hole 101 of the axial setting of valve seat 10; And the 3rd chamber 102 is communicated with first chamber 174 through fifth hole 101; The groove 182 of the fourth hole 103 that radially is provided with of valve seat 10 and the axial setting of valve pocket 18, and fourth hole 103 is communicated with flow-off 22 through groove 182.Such structural design has guaranteed being communicated with between pilot valve and the main valve, and has constituted overflow ducts.When import 20 pressure of reduction valve and/or when exporting 21 pressure and surpassing setting value; Flow to outlet 21 current through import 20 through valve port, second chamber 175; Wherein can some through first through hole 173, first chamber 174, fifth hole 101, the 3rd chamber 102; Promote pilot valve core 6 motions after fourth hole 103, groove 182, flow-off 22 flow to outlet 21 at last; The decompression and the relief function of reduction valve have been realized.
In the above-described embodiments; Controlling device comprises adjusting screw rod 1, locking nut 2 and Regulation spring 5, and adjusting screw rod 1 is screwed onto on the valve body 4, and Regulation spring 5 is pressed on the pilot valve core 6; Locking nut 2 and adjusting screw rod 1 bolt can be locked at adjusting screw rod 1 on the valve body 4.
In this technological scheme; Adjusting screw rod 1 can change the decrement of Regulation spring 5; Thereby change the pressure of reduction valve outlet 21; Locking nut 2 can be locked at the adjusting screw rod of having adjusted 1 on the valve body 4, and is constant with the decrement that guarantees Regulation spring 5, thereby the setting value that has guaranteed to export 21 pressure is constant.
Preferably, said pilot valve can be cone valve or guiding valve or ball valve.
In this embodiment, pilot valve can be the valve of different structure, and the valve that can select appropriate configuration according to different situations is as pilot valve.
Preferably, pilot valve and main valve are processed by stainless steel or copper or Cuprum alloy or anticorrosive; Valve body 4 is processed by anticorrosive.
In this technological scheme; It is good that stainless steel material has processibility; Corrosion resistance is good, is fit to advantages such as various condition of water quality, and copper, Cuprum alloy, that anticorrosive has corrosion resistance too is good; Be fit to advantages such as various condition of water quality, so can select suitable material manufacture pilot valve and main valve for use according to the different working situation; Valve body 4 adopts the anticorrosive that can satisfy processibility to process, and has guaranteed the anticorrosive property of said reduction valve.
Fig. 4 is that reduction valve of the present invention is connected schematic representation with the valve piece, and Fig. 5 is the right elevation of Fig. 4.
Like Fig. 4 and shown in Figure 5; Another embodiment of the present invention provides a kind of development machine water system; Comprise the valve piece; This development machine water system also comprises the described reduction valve of above-mentioned arbitrary embodiment, and the outer installment of said relief valve body 4 has screw thread, and reduction valve is fixedly connected with the valve piece through valve body 4 outside screw threads.
Reduction valve can adopt cartridge valve formula structure and valve piece plug-in mounting to be connected, and this Placement is simple, installs, convenient disassembly is easy.Obviously, this development machine water system has whole beneficial effects of above-mentioned reduction valve, repeat no more at this, but its application all should be within protection scope of the present invention.
In addition, the 3rd embodiment of the present invention provides a kind of development machine, and this development machine comprises the described development machine water system of technique scheme.Obviously, this development machine has whole beneficial effects of above-mentioned development machine water system, repeat no more at this, but its application all should be within protection scope of the present invention.
As shown in Figure 2; Among this embodiment, reduction valve is made up of spool 17, back-up ring 11, valve pocket 18, pilot valve core 6, valve seat 10, adjusting screw rod 1, locking nut 2, valve body 4, valve core reseting spring 12, Regulation spring 5, first seal ring 3, second seal ring 8, the 3rd seal ring 9, the 4th seal ring 14, the 5th seal ring 15, the 3rd back-up ring 7, the 4th back-up ring 13 and the 5th back-up ring 16.Wherein spool 17 is provided with first through hole 173, first chamber 174, second chamber 175, second through hole 171 and annular deep gouge 172, and valve pocket 18 is provided with third through-hole 181 and groove 182, and valve seat 10 is provided with fifth hole 101, the 3rd chamber 102, fourth hole 103.
The 5th seal ring 15 and the 5th back-up ring 16 are positioned at the end of valve pocket 18 near outlet 21; Be used for intercepting import 20 and outlet 21 pressure, the 4th seal ring 14 and the 4th back-up ring 13 are used for intercepting import 20 and flow-off 22 pressure between the import 20 and flow-off 22 of valve pocket 18; Second seal ring 8 is positioned at valve body 4 near flow-off 22 places; Be used for preventing flow-off 22 place's leaked waters, the 3rd seal ring 9 and the 3rd back-up ring 7 are used for seal valve seat 10 and valve body 4 between valve seat 10 and valve body 4; First seal ring 3 is used for sealing adjusting screw rod 1 and valve body 4 between adjusting screw rod 1 and valve body 4.
As shown in Figure 2, when import 20 pressure P 1 are lower than the setting pressure of spring 5, the current of import 20 in hole 181,171 entering chambeies 172, hole, spool 17 right ends pressure balances, spool 17 attonitys, current get in the development machine water systems through exporting 21.
As shown in Figure 3, when import 20 pressure P 1 become big or export 21 pressure P 2 when reaching the setup pressure value of reduction valve, pressure P 4 makes pilot valve core 6 overcome the elastic force of Regulation spring 5 in the 3rd chamber 102; Thereby being moved, poppet valve core opens pilot valve; Water gets into flow-offs 22 overflows through first through hole 173, first chamber 174, fifth hole 101, the 3rd chamber 102, fourth hole 103, groove 182 in second chamber 175, current through first through hole 173 after, the generation pressure loss; Pressure is reduced to P3 by P2; Spool 17 moves under P2, the effect of P3 pressure, reduces the area of passage of second through hole 171, makes import 20 pressure P 1 produce bigger pressure reduction through second through hole 171; Reduce outlet 21 pressure P 2, make pressure P 2 maintain setting value.
In sum, the invention provides a kind of reduction valve and adopt guide's overflow mode, be applicable to big flow water system, outlet pressure is stable, and not only other parts to the development machine water system play a protective role, and it is low also to have decompression, relief function and cost simultaneously.The present invention also provides a kind of development machine water system and development machine.
In the present invention, term " first ", " second ", " the 3rd ", " the 4th ", " the 5th " only are used for purpose of description, and can not be interpreted as indication or hint relative importance.Broad understanding all should be done in terms such as term " installation ", " linking to each other ", " connection ", " fixing ", for example, can be to be fixedly connected, and also can be to removably connect, or connect integratedly; Can be directly to link to each other, also can link to each other indirectly through intermediary.For those of ordinary skill in the art, can understand above-mentioned term concrete implication in the present invention as the case may be.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a reduction valve comprises valve body (4), controlling device, pilot valve and main valve, it is characterized in that,
Said pilot valve comprises pilot valve core (6), valve seat (10); Said pilot valve core (6) and valve seat (10) are positioned at said valve body (4); Said pilot valve core (6) can cooperate with said valve seat (10) with opening or close; Said controlling device is installed on said valve body (4) and upward and with said pilot valve core (6) is connected, and is used to regulate the pretightening force of said pilot valve core (6) and said valve seat (10);
Said main valve comprises spool (17) and valve pocket (18); Said spool (17) is mounted slidably in said valve pocket (18); Said valve pocket (18) is fixedly connected with said valve body (4), is provided with valve core reseting spring (12) between said spool (17) and the said valve seat (10);
Said valve pocket (18) axially be provided with outlet (21); Said valve pocket (18) radially be provided with import (20); Said import (20) is connected through valve port with said outlet (21), and the area of passage that changes said valve port can be regulated the pressure of said outlet (21); Also be provided with at least one flow-off (22) on the said valve pocket (18), open or close the on-off of realizing between said flow-off (22) and said outlet (21) through said pilot valve core (6) and said valve seat (10).
2. reduction valve according to claim 1; It is characterized in that; Said main valve is a sliding valve structure; One end of said valve pocket (18) is positioned at said valve body (4) and is threaded with said valve body (4), and the axial end of said spool (17) is provided with first chamber (174), and said valve core reseting spring (12) is positioned at said first chamber (174); The axial the other end of said spool (17) is provided with second chamber (175); Said second chamber (175) is communicated with said outlet (21), is provided with first through hole (173) between said first chamber (174) and said second chamber (175), and said first through hole (173) is communicated with said first chamber (174) and said second chamber (175).
3. reduction valve according to claim 2; It is characterized in that; Said spool (17) outer surface is provided with annular deep gouge (172); Said spool (17) radially is provided with second through hole (171), and said second through hole (171) is communicated with said second chamber (175), said valve pocket (18) radially be provided with the third through-hole (181) that is communicated with said import (20); Said second through hole (171) and said third through-hole (181) are connected through said annular deep gouge (172), and then said second through hole (171), said third through-hole (181) and said annular deep gouge (172) are formed said valve port.
4. reduction valve according to claim 3 is characterized in that, is provided with back-up ring (11) between said spool (17) and the said valve pocket (18), and said back-up ring (11) can stop said spool (17) to skid off said valve pocket (18).
5. according to each described reduction valve in the claim 2 to 4; It is characterized in that; Said valve seat (10) axially be provided with the 3rd chamber (102) and fifth hole (101); Said the 3rd chamber (102) is communicated with said first chamber (174) through said fifth hole (101); Said valve seat (10) radially be provided with fourth hole (103), what said valve pocket (18) was positioned at said valve piece (4) one end outer surfaces axially is provided with at least one groove (182), said fourth hole (103) is communicated with said flow-off (22) through said groove (182); Said pilot valve core (6) is installed between said fourth hole (103) and said the 3rd chamber (102), opening or cooperate the on-off of realizing said fourth hole (103) and said the 3rd chamber (102) with closing through said pilot valve core (6) and said valve seat (10).
6. reduction valve according to claim 5; It is characterized in that; Said controlling device comprises adjusting screw rod (1), locking nut (2) and Regulation spring (5), and said adjusting screw rod (1) is screwed onto on the said valve body (4), and said Regulation spring (5) is pressed on the said pilot valve core (6); Said locking nut (2) and said adjusting screw rod (1) bolt can be locked at said adjusting screw rod (1) on the said valve body (4).
7. reduction valve according to claim 1 is characterized in that, said pilot valve can be cone valve or guiding valve or ball valve.
8. reduction valve according to claim 1 is characterized in that, said pilot valve and main valve can be processed by stainless steel or copper or Cuprum alloy or anticorrosive; Said valve body (4) is processed by anticorrosive.
9. development machine water system; Comprise the valve piece, it is characterized in that, also comprise each described reduction valve in the claim 1 to 8; The outer installment of said relief valve body (4) has screw thread, and said reduction valve is fixedly connected with said valve piece through the outside screw thread of said valve body (4).
10. a development machine is characterized in that, comprises development machine water system as claimed in claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103156972A CN102818046A (en) | 2012-08-30 | 2012-08-30 | Reducing valve, roadheader water system and roadheader |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012103156972A CN102818046A (en) | 2012-08-30 | 2012-08-30 | Reducing valve, roadheader water system and roadheader |
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| CN102818046A true CN102818046A (en) | 2012-12-12 |
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| CN104595268A (en) * | 2014-12-02 | 2015-05-06 | 武汉船用机械有限责任公司 | Pilot type integrated hydraulic governor control valve |
| CN104806787A (en) * | 2014-01-27 | 2015-07-29 | 卡特彼勒公司 | Valve component, hydraulic system having same, and operation machine |
| CN106151478A (en) * | 2016-08-17 | 2016-11-23 | 无锡市鑫盛换热器制造有限公司 | Gear-box filtration system inlet valve block |
| CN108662195A (en) * | 2018-05-09 | 2018-10-16 | 珠海市万顺睿通科技有限公司 | A kind of fluid valve for sea water desalination |
| CN107044461B (en) * | 2017-04-17 | 2019-02-12 | 宁波江北宇洲液压设备厂 | A kind of inverse-proportion pressure reducing valve of hydraulic coupling control |
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| US6986362B2 (en) * | 2004-02-25 | 2006-01-17 | Volvo Construction Equipment Holding Sweden Ab | Pilot operated relief valve |
| CN101124525A (en) * | 2005-02-11 | 2008-02-13 | Hydac流体技术有限公司 | Valve, especially proportional pressure control valve |
| CN201133503Y (en) * | 2007-12-22 | 2008-10-15 | 陈涵霖 | Automobile hydraulic power-assisted steering pump plug type overflow pressure-stabilizing valve |
| CN101943202A (en) * | 2010-08-22 | 2011-01-12 | 林友根 | Link bolt with pilot type reducing valve |
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| CN104806787A (en) * | 2014-01-27 | 2015-07-29 | 卡特彼勒公司 | Valve component, hydraulic system having same, and operation machine |
| CN104595268A (en) * | 2014-12-02 | 2015-05-06 | 武汉船用机械有限责任公司 | Pilot type integrated hydraulic governor control valve |
| CN104595268B (en) * | 2014-12-02 | 2016-08-17 | 武汉船用机械有限责任公司 | A kind of pilot-operated type integrated hydraulic speed regulating control valve |
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Application publication date: 20121212 |