CN201621338U - Cascade voltage preventing reducing valve - Google Patents
Cascade voltage preventing reducing valve Download PDFInfo
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- CN201621338U CN201621338U CN2010201138340U CN201020113834U CN201621338U CN 201621338 U CN201621338 U CN 201621338U CN 2010201138340 U CN2010201138340 U CN 2010201138340U CN 201020113834 U CN201020113834 U CN 201020113834U CN 201621338 U CN201621338 U CN 201621338U
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- main valve
- reduction valve
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Abstract
The utility model provides a cascade voltage preventing reducing valve comprising a main valve, a voltage reducing guide valve communicated with the main valve, and a cascade voltage preventing device arranged on the reducing valve, wherein the cascade voltage preventing device comprises a control device and a switching device; the control device is communicated with the valve rear part of the main valve and senses the state of valve rear pressure; the switching device is connected with the control device and responses to the control of the control device for selective on-off; and the first side of the switching device is communicated with the lower cavity of a control room of the main valve, and the second side thereof leads to the exterior.
Description
Technical field
The utility model relates to Hydraulic Field, is specifically related to a kind of reduction valve with anti-string compression functions.
Background technique
Reduction valve is a kind of device of automatic reduction working pressure of pipeline, and it can the hydraulic pressure that pipeline before the valve is higher be reduced to the required level of pipeline behind the valve.In the using process of reduction valve, because the upstream pressure unexpected variation of crossing low or water outlet flow, can cause reduction valve string to occur and press phenomenon (that is, pressure is close and be higher than the downstream pressure of reduction valve original start before and after the reduction valve).String presses phenomenon can cause the reduction valve can't proper functioning and then inefficacy, has reduced stability in use.The reduction valve that exists some to possess anti-string compression functions in the prior art, general solution are to connect a Decompression valves on the person in charge of reduction valve, and when the downstream pressure of reduction valve was higher than the setting pressure of Decompression valves, Decompression valves will be opened earial drainage.In this configuration, Decompression valves is arranged on the main line of reduction valve, thereby when the Decompression valves earial drainage reduces pressure, can bring a large amount of losses that effluxes, and causes the hydraulic fluid in the system to run off in a large number.
The model utility content
The purpose of this utility model is to provide a kind of anti-string to press reduction valve, and it is simple in structure, and can solve above-mentioned problems of the prior art.
At above-mentioned purpose, the utility model provides a kind of anti-string to press reduction valve, it comprises: the anti-string pressure device on main valve, the decompression pilot valve that is connected with main valve and the pilot line that is arranged on reduction valve, anti-string pressure device comprises: control gear, with is communicated with also Inductance valve behind the valve of main valve after pressure status; COMM communication, link to each other with control gear and in response to the control of control gear break-make optionally, first side of COMM communication is communicated with the cavity of resorption in the control room of main valve and second side is led to the outside.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, control gear is an electric controller, be communicated with behind the valve of an end and main valve responding to downstream pressure, electric controller in response to downstream pressure selectivity send switching signal; COMM communication is a solenoid valve, links to each other with the other end of electric controller optionally to open in response to the break-make of electric controller or to close, and first side of solenoid valve is communicated with the cavity of resorption in the control room of main valve and second side is led to the outside.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, electric controller comprises the induction installation and the electric control box of polyphone, is communicated with behind an end of induction installation and the valve of main valve, electric control box links to each other with solenoid valve, induction installation.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, induction installation is pressure gauge with electric contact or pressure transducer.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, anti-string press-fits and is changed to switch valve, comprising: control port, be formed on the valve body of switch valve, control port is communicated with the outlet end of main valve to respond to downstream pressure; The switch passage is formed on the interior and optionally connection or the disconnection in response to the pressure at control port place of valve body of switch valve, and first side of switch passage is communicated with the cavity of resorption in the control room of main valve and second side is led to the outside.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, be provided with the elastic device that moves in response to the pressure at control port place in the valve body of switch valve, be connected with switching member on the elastic device, switching member is optionally opened or the cut-off switch passage with the action of elastic device.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, elastic device comprises: resilient member, the pressure adjusting member that links to each other with resilient member one end and the flexible membrane that links to each other with the resilient member the other end, flexible membrane is enclosed in elastic device one side of valve body.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, an end of switching member links to each other with flexible membrane, and the other end extends into the switch passage optionally to open or the cut-off switch passage.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, the switch passage comprises two sections, the joint of two sections is provided with the partition member that inside has through hole, an end of switching member optionally the through hole of opening and closing of fault partition member to open or the cut-off switch passage.
Concrete, press reduction valve according to anti-string of the present utility model, wherein, the switch passage is the passage of straight line type, broken line type or curved.
The utlity model has following technique effect:
At first, anti-string of the present utility model presses reduction valve to be equipped with decompression pilot valve and switch valve simultaneously in the control system of main valve, can prevent and eliminate string effectively and press phenomenon;
Secondly, the switch valve of reduction valve of the present utility model is arranged on the pilot line, and it has replaced the configuration of pressure relief device was set on system's main line originally, thereby significantly reduces to efflux loss in a large number in the flooding process, greatly reduces system operation cost;
Once more, anti-string of the present utility model presses structure of relief pressure valve simply compact, and the boundary dimension of main valve does not have notable change with the product of using always at present, realizes that cost is low;
In addition, the switch valve in the reduction valve of the present utility model can hang over the main valve outside directly outward, is convenient to maintenance and renewal part, can not shut down the ground on-line maintenance.
Should be appreciated that above generality is described and the following detailed description is all enumerated and illustrative, purpose is in order to provide further instruction to claimed the utility model.
Description of drawings
Accompanying drawing constitutes the part of this specification, is used to help further understand the utility model.These accompanying drawings illustrate embodiments more of the present utility model, and are used for illustrating principle of the present utility model with specification.Identical in the accompanying drawings parts are represented with identical label.In the accompanying drawing:
Fig. 1 shows the schematic diagram of pressing reduction valve according to the anti-string of the utility model first mode of execution;
Fig. 2 shows the structural drawing of pressing the anti-string pressure device in the reduction valve according to anti-string of the present utility model;
Fig. 3 shows the schematic diagram of pressing reduction valve according to the anti-string of the utility model second mode of execution.
Embodiment
Below with reference to accompanying drawings and in conjunction with instantiation mode of execution of the present utility model is described.
At first Application of Pressure Rudicing Valve and principle are carried out brief description.Reduction valve is widely used in tall building, too high zone, mine and other occasions of city water-supply pipe network hydraulic pressure, and each obtains suitable service hydraulic pressure and flow with water spot in the water system to ensure to.In view of the leak rate and the waste degree of water almost is directly proportional with the hydraulic pressure size of water supply system, so reduction valve has the system conditions of improvement and potential water saving effect.The structural type of reduction valve is a lot, and common have diaphragm type, an inner spring piston type etc.Reduction valve mainly partly is made of main valve, control pilot valve, filter, needle-valve, ball valve and by-pass line throttling usually.Reduction valve mainly is reduced to the inlet pressure (inlet pressure of main valve) of pipe-line system by self regulating action the outlet pressure value of a certain needs, make outlet pressure keep relatively low steady pressure, when inlet pressure or flow change, rely on valve inner fluid medium itself energy and automatically within the specific limits with the outlet pressure maintenance.The basic role principle of reduction valve is that the scope that hydraulic pressure falls is regulated automatically by the film that connects flap or the import and export differential water pressures of piston both sides by the local resistance reduction hydraulic pressure of valve inner flow passage to current.
Because the string pressure phenomenon that preamble is described can take place in reduction valve in the course of the work; therefore need in collaborative, corresponding pressure relief device be set; so that hydraulic fluid unnecessary in the hydraulic system is overflowed; make the fluid in the hydraulic system keep certain pressure; simultaneously can also prevent system overload, play the effect of safety protection.But the pressure relief device operated by rotary motion when pressure relief device is opened pressure release, has a large amount of spill lossess in the system in the main line of hydraulic system.
At the problems referred to above, the utility model provides a kind of anti-string to press reduction valve, the anti-string pressure device on decompression pilot valve that it mainly comprises main valve, be connected with main valve and the pilot line that is arranged on reduction valve.Particularly, anti-string pressure device comprise be communicated with behind the valve with main valve and Inductance valve after pressure status control gear and link to each other with above-mentioned control gear and in response to the control of control gear the COMM communication of break-make optionally, first side of this COMM communication is communicated with the cavity of resorption in the control room of main valve and second side is led to outside recovering device (not shown).Utilize above-mentioned anti-string pressure device, anti-string of the present utility model presses reduction valve can prevent to go here and there the generation of pressing phenomenon effectively.Particularly, the control gear in the anti-string pressure device is responded to downstream pressure, and sends the corresponding action signal according to downstream pressure to COMM communication, and COMM communication is switched on or switched off in response to the actuating signal that receives.In the utility model, when downstream pressure when too high (being higher than the reduction valve setup pressure value), COMM communication will be opened, then the main valve control room cavity of resorption that is communicated with first side of COMM communication can pass through the quick earial drainage of COMM communication, lets out the fluid that removes from above-mentioned cavity of resorption and passes through second effluent to outside recovering device.The pressure of control room cavity of resorption is owing to earial drainage reduces, thereby produces pressure difference between epicoele and the cavity of resorption, thereby the valve rod of main valve is moved downward, and drives valve plate sealing main valve, realizes that thus main valve promptly closes, and whole response process is very fast.Because main valve is closed, make do not have fluid further to be supplied to the valve of main valve after, let out downstream pressure (control room cavity of resorption with valve then communicate) simultaneously thus, downstream pressure descends, after returning back to normal downstream pressure, COMM communication is closed, and cavity of resorption stops earial drainage, and main valve is this proper functioning (being in the decompression working state).Utilize above-mentioned control gear, reduction valve of the present utility model can cut out main valve rapidly by quick earial drainage, thereby prevents to go here and there the Hair Fixer life effectively.Further, owing between the valve rear chamber of main valve and the cavity of resorption connecting through hole is arranged, therefore, when main valve is closed and after closing, main valve can also be let out except that the pressure behind the valve by cavity of resorption, thereby makes downstream pressure reply normal value more rapidly.
Above-mentioned is basic structure and the working principle that anti-string of the present utility model is pressed reduction valve, hereinafter with reference to exemplary embodiment embodiment of the present utility model is described.In this manual, described the anti-string of two kinds of control modes and pressed reduction valve, a kind of is the hydraulic control reduction valve, and a kind of is the reduction valve of the automatically controlled combination of hydraulic control, will be elaborated by the reduction valve of illustrative examples to these two kinds of mode of executions below.
At first the reduction valve to pure hydraulic control mode describes.Fig. 1 shows according to the anti-string of the utility model first mode of execution and presses reduction valve 100.Fig. 2 shows the concrete structure figure of switch valve used in the reduction valve 100 of present embodiment (anti-string pressure device) 130, and in the embodiment shown in Fig. 1,2, anti-string pressure device has adopted all-in-one-piece structure.
The anti-string that Fig. 1 shows presses reduction valve 100 mainly to comprise main valve 110, decompression pilot valve 120 and switch valve 130, wherein main valve 110 is arranged on the main line L, decompression pilot valve 120 is arranged in the pilot line of the reduction valve that links to each other with main line L with switch valve 130, as the major component of the control system of this reduction valve 100, so that the operation of control reduction valve 100 and string takes place in preventing operation press phenomenon.As shown in Figure 1, 2, main valve in the reduction valve 100 of the present utility model 110 and decompression pilot valve 120 and switch valve 130 all adopt the diaphragm type valve.Certainly, in other embodiments, above-mentioned valve also can adopt other suitable forms, for example valve of spring piston formula.Press in the reduction valve 100 at anti-string of the present utility model, decompression pilot valve 110 is used to control the normal running of reduction valve 100, and its pressure that is mainly used in the outlet end 111 of main valve 110 remains in the suitable scope; And switch valve is mainly used in and prevents from reduction valve 100 working procedure to occur string and press phenomenon, when the downstream pressure of the main valve 110 of reduction valve 100 is too high, decompression pilot valve 110 lost efficacy, switch valve 120 is opened, thereby let out a part of flow rapidly except that main valve 110 outlet ends 112, make main valve 110 close thus, meanwhile let out a part of downstream pressure, make whole reduction valve 100 reply normal working fast except that reduction valve 100.Continue below to specifically describe the structure of pressing reduction valve 100 according to the anti-string of present embodiment with reference to Fig. 1.
As shown in Figure 1, anti-string of the present utility model presses reduction valve 100 at first to comprise main valve 110, and it comprises liquid feeding end 111, outlet end 112, control room 113, valve rod 114 and valve plate 115.One end of valve rod 114 extends into control room 113, and the other end is connected with valve plate 115, and valve plate 115 is used to seal the opening 111a that liquid feeding end 111 communicates with outlet end 112.During main valve 110 work, pressure in the control room 113 can be along with the changes in flow rate of the liquid feeding end 111 (before the valve) of main valve 110 and outlet end 112 (behind the valve) and is changed, 114 variations in response to control room 113 internal pressures of valve rod (pressure difference between epicoele 116 and the cavity of resorption 117) and to-and-fro motion.Particularly, control room 113 comprises epicoele 116 that communicates with liquid feeding end 111 and the cavity of resorption 117 that communicates with outlet end 112, separate with flexible membrane 118 between epicoele 116 and the cavity of resorption 117, valve rod 114 is connected in flexible membrane 118, because diaphragm 118 has flexibility, therefore when before the valve of valve rod 114 in response to reduction valve 110, downstream pressure difference and when moving, diaphragm 118 can produce accordingly and be out of shape.Correspondingly, the valve plate 115 that is connected valve rod 114 1 ends is understood the liquid feeding end 111 that optionally open or close main valve 110 with the motion of valve rod 114.The manner of execution of main valve 110 will be described in detail with switch valve 130 in conjunction with decompression pilot valve 120 hereinafter.
Further, reduction valve 100 also comprises the decompression pilot valve 120 that is used for the pressure at outlet end 111 places of reduction valve 100 is remained on the appropriate value place, its first port one 21 is communicated with the liquid feeding end 111 of main valve 110, second port one 22 is communicated with the outlet end 112 of main valve 110, and the 3rd port one 23 is communicated with the epicoele 116 in the control room 113 of main valve 110.As shown in Figure 1, connect the pipeline of first port one 21 and the liquid feeding end 111 of main valve 110 and be connected in the pipeline of second port one 22 and the outlet end 112 of main valve 110 and be provided with gate valve and filter.When reduction valve 100 proper functioning, the upstream pressure of reduction valve 100 and downstream pressure all are in normal state, upstream pressure (pressure at liquid feeding end 111 places) is not less than preset pressure value, and downstream pressure (pressure at outlet end 112 places) by the decompression pilot valve 120 adjusting (optionally open or close) remain under the suitable pressure, make it not be higher than default downstream pressure value.When the downstream pressure of reduction valve 100 was higher than the systemic presupposition force value, reduction valve 100 was in the abnormal operation state, and decompression pilot valve 110 will cut out.Simultaneously, because the pass closed procedure of decompression pilot valve 110 is slow relatively, utilize switch valve 130 to close main valve 110 rapidly this moment, lets out simultaneously except that downstream pressure, makes system reply normal working (will be described in more detail below).Particularly, as shown in Figure 1, the upstream pressure of reduction valve 100 and downstream pressure be the pressure gauge monitoring by linking to each other with outlet end 112 with liquid feeding end 111 respectively.
Continuation is with reference to Fig. 1, and reduction valve 100 also comprises and be used to the switch valve 130 that prevents that reduction valve 100 strings from pressing, and it has control port 131 and by two switch passages of constituting of pipe section 132,133 independently.The port of cavity of resorption 117, the first pipe section 133 that the port that control port 131 is connected in outlet end 112, the first pipe section 132 of main valve 110 is connected to the control room 113 of main valve 110 leads to outside recovering device.Further, be provided with the elastic device that moves in response to the pressure at control port 131 places in the valve body 134 of switch valve 130, be connected with switching member on the elastic device, switching member is optionally opened or cut-off switch passage 132 and 133 with the action of elastic device.
To continue below the decompression pilot valve 120 of reduction valve 100 of the present utility model and the structure of switch valve 130 to be elaborated with reference to accompanying drawing.As shown in Figure 1, decompression comprises in the pilot valve 120: the pressure regulating spring 125 that is used to set the cracking pressure of decompression pilot valve 120, it is arranged in the first chamber 120a of decompression pilot valve 120 1 sides (upside shown in Fig. 1), one end of pressure regulating spring 125 (upper end shown in Fig. 1) is connected with the pressure adjusting element 125a that exposes to decompression pilot valve 120 outsides, so that utilize this pressure adjusting element 125a that the cracking pressure of decompression pilot valve 120 is regulated; Valve plate Packing spring 126, it is arranged in the second chamber 120b of decompression pilot valve 120 opposite sides (downside shown in Fig. 1); And second valve rod 124 that is used to close or open decompression pilot valve 120, it is pressed between the other end (lower end shown in Fig. 1) and valve plate Packing spring 126 of pressure regulating spring 125, thereby can to-and-fro motion under the acting in conjunction of the pressure regulating spring 125 of both sides and valve plate Packing spring 126 and downstream pressure.Second valve rod 124 extends through the 3rd chamber 120c between the first chamber 120a and the second chamber 120b, wherein, the end that second valve rod 124 is compressed to pressure regulating spring 125 is provided with the adjusting diaphragm 127 that pressure regulating spring 125 is sealed in the indoor 120a of pressure regulating cavity, regulates diaphragm 127 and also is used for impression and then transmits pressure to Regulation spring 125.Simultaneously, as shown in Figure 1, second valve rod 124 is compressed to be connected with on the end of valve plate Packing spring 126 regulates valve plate 128, and it is used for optionally being communicated with or disconnects being connected between the 3rd chamber 120c and the second chamber 120b.In addition, be provided with the needle-valve 129 that is used to control from the flow size of first port one, 21 to the 3rd port ones 23 in the 120b of sealed chamber of decompression pilot valve 120.
When the downstream pressure of main valve 110 is hanged down (not being higher than preset pressure value), decompression pilot valve 120 is opened, under the normal condition, decompression pilot valve 120 sealing valve plates 128 separate with connection opening between the 3rd chamber 120c and the second chamber 120b, thereby make the 3rd chamber 120c and the second chamber 120b connect each other, outlet end 112 places of main valve 110 keep a pressure stable.The pilot valve 120 that reduces pressure this moment is opened, the fluid that enters decompression pilot valve 120 from first port one 21 arrives the 3rd port one 23 by needle-valve 129, fluid is punished into two-part at the 3rd port one 23, a part enters the epicoele 116 of main valve 110 by the pipeline that is connected with the 3rd port one 23, another part enters the 3rd chamber 120c by connection opening 120d, and then by behind second port one, the 22 arrival valves.Simultaneously, the fluid in the 3rd chamber 120c also contacts and transmits pressure by through hole 120e with adjusting diaphragm 127.Because (outlet end 112) links to each other behind the valve of second port one 22 and main valve 110, when downstream pressure increases, increased pressure in the 3rd chamber 120c, thereby upwards promote second valve rod 124, the closure of regulating 128 couples of connection opening 120d of valve plate increases, thereby reduced to enter the Fluid Volume of epicoele 120c by connection opening 120d, enter the Fluid Volume increase of main valve 110 epicoeles 116 simultaneously by the 3rd port one 23, then produce pressure difference between epicoele 116 and the cavity of resorption 117, thereby valve rod 114 is moved downward, reduce the aperture of opening 111a gradually, the flow that arrives outlet end 112 by opening 111a reduces, and downstream pressure descends.When downstream pressure dropped to a certain degree, second valve rod 124 can move down under the acting in conjunction of last lower spring and hydrodynamic pressure, and the aperture of connection opening 120d increases, thereby downstream pressure is gone up again gradually.By this mode of back and forth regulating in real time, decompression pilot valve 120 remains on a stable value place with the downstream pressure of main valve 110.
Below, describe the concrete structure of switch valve 130 of the present utility model with reference to Fig. 2, and its working method is described.As shown in Figure 2, anti-string of the present utility model presses the switch valve 130 of reduction valve 100 to comprise a valve body 134, and it is used to hold each member of switch valve 130.Particularly, in the present embodiment, elastic device in the switch valve 130 can comprise: helical spring (resilient member) 142, the pressure adjusting member 143 that links to each other with helical spring 142 1 ends and the flexible membrane 139 that links to each other with helical spring 142 the other ends, flexible membrane 139 is enclosed in a side of valve body 134 with above-mentioned elastic device, as shown in Figure 2.The flexible membrane 139 of switch valve 130 is similar with manner of execution to the effect of the flexible membrane 118 of above-mentioned main valve 110, just has been not described in detail at this.Pressure adjusting member 143 comprises the end that is screwed in valve body 134 and is exposed to the adjusting bolt 143a in valve body 134 outsides and places valve body 134 press part 143b inboard and that be associated with adjusting bolt 143a, one end of resilient member 142 is pressed on the press part 143b, and the other end is pressed on first link 144 above the flexible membrane 139 of switch valve 130.In other embodiments, the top of valve body 134 can be made into the valve gap of separation, valve gap can be screwed in the valve body top, and resilient member 142 directly is pressed on the valve gap inboard.
In other embodiments, the resilient member that can make for sheet spring, piezoelectric element or rubber material of elastic element.Pressure adjusting member 143 also can adopt various ways, as being adjusting member of sliding type etc.Those skilled in the art can design the pressure adjusting member of various ways according at present habitual technological means, and the form that is not limited only in the present embodiment to be exemplified.And the make of elastic device also is diversified, is not limited to this specific constructive form of describing in the present embodiment equally.Further, switch passage of the present utility model also can adopt various ways, can adopt the above-described form that has two independent tubes sections to constitute, also can adopt the passage of integral type, and the shape of passage can be carried out any suitable distortion according to the internal structure of switch valve, for example can be the passage of straight line type, broken line type or curved.
In the present embodiment, switching member one end is connected with flexible membrane 139, and the other end then extends into the switch passage optionally to open or to disconnect this switch passage.As shown in Figure 2, the joint of first pipe section 132 and second pipe section 133 is provided with partition member 145, and its inside is formed with through hole 145a.Switching member comprises actuating rod 140 and is connected the switch plate 141 of its end, valve plate 115 is the through hole 145a in the opening and closing of fault partition member 145 optionally along with the action of valve rod 114, and then opens or disconnect being connected between first pipe section 132 and second pipe section 133.When switch valve 130 cut out, switch plate 141 sealings were provided with the through hole 145a in the partition member 145, and this moment, first pipe section 132 and second pipe section 33 disconnected each other; When switch valve 130 is opened, switch plate 141 is along with the direction motion of actuating rod 140 to elastic device, thereby break away from partition member 145, make win pipe section 132 and 133 connections of second pipe section thus, fluid in main valve 110 cavity of resorptions 117 can be via connecting pipeline, and by first pipe section 132, second pipe section, 133 earial drainages, thereby prevent string pressure phenomenon.
The working method of the switch valve 130 of said structure is as follows.The pressure of locating of control port 131 induction outlet ends 112, when pressure occurs when unusual, be that the pressure that the outlet end 112 (being downstream pressure) of main valve 110 is located surpasses predefined value, switch valve 130 is opened, thereby cavity of resorption 117 can make that thus the pressure in the cavity of resorption 117 reduces by first pipe section 132 and then by second pipe section, 133 earial drainages.Decline along with cavity of resorption 117 internal pressures, produce pressure difference between the epicoele 116 in control room 113 and the cavity of resorption 117, this pressure difference causes valve rod 114 to move downward, thereby make the opening between valve plate 115 sealing liquid feeding ends 111 and the outlet end 112, make main valve 110 close gradually, the flow of outlet end 112 reduces gradually.Along with the flow minimizing at outlet end 112 places, the pressure of the outlet end 112 of reduction valve 100 reduces, and downstream pressure will be replied normal value gradually.After downstream pressure was replied normal value, switch valve 130 cut out, and whole pressure relief valve system is replied normal operating state again.Need to prove, the second above-mentioned default pressure is higher than the first default pressure, the first default pressure wherein is the normal operating pressure of reduction valve 100, and this pressure is set by the pressure regulating spring 125 of decompression pilot valve 120 is regulated; The second default pressure is that the critical pressure that string is pressed takes place reduction valve 100, and this pressure is provided with by the pressure adjusting member 143 of switch valve 130.Further, as shown in Figure 1, offer through hole 118a on the cover plate 118 of cavity of resorption 117 1 sides in the control room 113 of main valve 110, cavity of resorption 117 communicates with the outlet end 112 of main valve 110 by this through hole 118a, thus, when passing through decompression port 132 earial drainages of switch valve 130, the outlet end 112 of main valve 110 can also release a part of flow by through hole 118a, thereby can obtain better earial drainage effect, make that the time of reduction valve 100 answer normal states is shorter.
By above-mentioned description as can be known, press reduction valve 100 can prevent effectively that the string in reduction valve 100 working procedure from pressing phenomenon according to anti-string of the present utility model.Anti-string of the present utility model presses reduction valve 100 to be equipped with decompression pilot valve 120 and switch valve 130 simultaneously in the control system of main valve 110, under different working staties, main valve 110 respectively with decompression pilot valve 120 and switch valve 130 compounding practices, can guarantee the normal running of reduction valve 100 on the one hand, on the other hand can be behind system valve during overpressure, close main valve 110 rapidly, let out simultaneously and subtract downstream pressure, thereby prevent string pressure phenomenon, make system reply normal working fast.As shown in Figure 1, the decompression pilot valve 120 and the switch valve 130 of reduction valve 100 of the present utility model all are arranged on the pilot line, but not are set directly on the main line, thereby significantly reduce to efflux loss in a large number in the flooding process, greatly reduce system operation cost.And anti-string of the present utility model is pressed the simple and compact for structure of reduction valve 100, and the boundary dimension of main valve 110 and internal structure and the product of using always at present do not have notable change, realizes that cost is low.In addition; switch valve in the reduction valve of the present utility model can directly hang over the outside (not shown) of main valve outward; and at the front and back of switch valve installation and maintenance valve; when needing repairing; maintenance valve before and after the off switch valve can be taken switch valve apart maintenance; thereby be convenient to maintenance and renewal part, can not shut down the ground on-line maintenance.
In addition, as shown in Figure 1, the control port 131 that connects switch valve 130 is provided with filter 146 and gate valve 147 with the pipeline of the outlet end 112 of main valve 110, and filter and gate valve on the connecting pipeline of its effect and decompression pilot valve 120 are similar, is used to prevent that dirt from entering and influence switch valve.
Then, hereinafter will the reduction valve according to the automatically controlled combination of hydraulic control of the present utility model be described.Fig. 3 shows according to the anti-string of the utility model second mode of execution and presses reduction valve 200.The difference with above-mentioned reduction valve 100 among this embodiment has been to adopt the automatically controlled anti-string pressure device that combines of hydraulic control, the working method of reduction valve 200 under normal state is identical with the working method of above-mentioned reduction valve 100, for the sake of brevity, just no longer be repeated in this description at this.Only formation and the working method to anti-string pressure device describes.
In the embodiment shown in fig. 3, anti-string pressure device comprises: electric controller, one end are communicated with the outlet end 212 (behind the valve) of main valve 210 responding to downstream pressure, and in response to downstream pressure the selectivity break-make; Solenoid valve 233 links to each other optionally to open in response to the break-make of electric controller or to cut out with the other end of electric controller, and the first side 233a of solenoid valve 233 is communicated with the cavity of resorption 217 in the control room 213 of main valve and the second side 233b leads to outside recovering device.
Particularly, in the present embodiment, electric controller comprises the induction installation 231 and the electric control box 232 of polyphone, induction installation is a pressure gauge with electric contact in illustrated embodiment, pressure gauge with electric contact 231 is switched on or switched off and the contacting of electric contact according to its downstream pressure of sensing, sends different state signals thereby change.In other embodiments also can adopts pressure sensor, pressure transducer produces corresponding state signal according to the downstream pressure of sensing, and then changes the state of COMM communication by electric control box.As shown in the figure, be communicated with behind an end of pressure gauge with electric contact 231 and the valve of main valve 210, an end of electric control box 232 links to each other with solenoid valve 233.In other embodiments, electric controller also can be all-in-one-piece device, is about to electric control box 232 and pressure gauge with electric contact 231 and integrates.In the present embodiment, solenoid valve 232 is a normally closed solenoid valve.
Working method to the anti-string pressure device of present embodiment describes below.Because the working principle of anti-string pressure device all is identical, only carries out brief description below.When the downstream pressure of reduction valve 200 is higher than the reduction valve setup pressure value, the pointer of pressure gauge with electric contact 231 and setting pressure pointer (setting pressure pointer according to the valve of reduction valve after setting pressure regulate) contact, make the circuit turn-on of electric controller thus, electric control box 232 is to solenoid valve 233 energisings, solenoid valve 233 energisings are opened, solenoid valve 233 pressure releases of cavity of resorption 217 by opening of the main valve 210 of reduction valve 200, under the upper and lower cavity pressure difference effect of control room, the valve of main valve 210 is closed rapidly.Meanwhile, the outlet end chamber of main valve 210 is by the through hole 218a identical with cavity of resorption 217, and then lets out except that downstream pressure by solenoid valve 233.When downstream pressure reaches the reduction valve setup pressure value, the pointer of pressure gauge with electric contact 231 and setting pressure pointer disconnect, the circuit of electric controller disconnects, electric control box 232 stops to solenoid valve 233 energisings, solenoid valve 233 cuts out, the main valve 210 of reduction valve 200 is opened again, and normal working is replied by system.
Aforesaid, the anti-string pressure control device that adopts in the utility model can be let out except that flow behind the valve of main valve occurring closing main valve apace when string is pressed phenomenon simultaneously effectively, reduces the pressure behind the valve, makes system reply the safe handling state.And,, thereby can when earial drainage, reduce the loss that effluxes of system owing to anti-string pressure control device is arranged in the pilot line of pressure relief valve system.
Be preferred embodiment of the present utility model only below, be not limited to the utility model, for a person skilled in the art, the utility model can have various changes and variation.All any modifications of within spirit of the present utility model and principle, being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (10)
1. an anti-string is pressed reduction valve (100), it is characterized in that, comprising: main valve (110), the decompression pilot valve (120) that is connected with described main valve and be arranged on anti-string pressure device on the described reduction valve, and described anti-string pressure device comprises:
Control gear, be communicated with behind the valve of described main valve and Inductance valve after pressure status;
COMM communication, link to each other with described control gear and in response to the control of described control gear break-make optionally, first side of described COMM communication is communicated with the cavity of resorption (117) in the control room (113) of described main valve and second side is led to the outside.
2. anti-string according to claim 1 is pressed reduction valve, it is characterized in that, described control gear is electric controller (231,232), is communicated with behind the valve of an end and described main valve with the induction downstream pressure, and selectivity is sent switching signal to described electric controller in response to described downstream pressure;
Described COMM communication is solenoid valve (233), link to each other optionally to open in response to the break-make of described electric controller or to close with the other end of described electric controller, first side (233a) of described solenoid valve is communicated with the cavity of resorption (117) in the control room (113) of described main valve and second side (233b) is led to the outside.
3. anti-string according to claim 2 is pressed reduction valve, it is characterized in that, described electric controller comprises the induction installation (231) and the electric control box (232) of polyphone, is communicated with behind an end of described induction installation and the valve of described main valve, and described electric control box links to each other with described solenoid valve, induction installation.
4. anti-string according to claim 3 is pressed reduction valve, it is characterized in that described induction installation is pressure gauge with electric contact or pressure transducer.
5. anti-string according to claim 1 is pressed reduction valve, it is characterized in that, described anti-string press-fits and is changed to switch valve (130), comprising:
Control port (131) is formed on the valve body of described switch valve, and described control port is communicated with the outlet end (112) of described main valve with the induction downstream pressure;
Switch passage (132,133), be formed on the interior and optionally connection or the disconnection in response to the pressure at described control port place of valve body of described switch valve, first side (132) of described switch passage is communicated with the cavity of resorption (117) in the control room (113) of described main valve and second side (133) is led to the outside.
6. anti-string according to claim 5 is pressed reduction valve, it is characterized in that,
Be provided with the elastic device that moves in response to the pressure at described control port place in the valve body (134) of described switch valve (130), be connected with switching member on the described elastic device, described switching member is optionally opened with the action of described elastic device or is disconnected described switch passage.
7. anti-string according to claim 6 is pressed reduction valve, it is characterized in that, described elastic device comprises: resilient member (142), the pressure adjusting member (143) that links to each other with described resilient member one end and the flexible membrane (139) that links to each other with the described resilient member the other end, described flexible membrane is enclosed in described elastic device one side of described valve body.
8. anti-string according to claim 7 is pressed reduction valve, it is characterized in that an end of described switching member links to each other with described flexible membrane, and the other end extends into described switch passage optionally to open or to disconnect described switch passage.
9. anti-string according to claim 7 is pressed reduction valve, it is characterized in that, described switch passage comprises two sections (132,133), the joint of described two sections is provided with the partition member that inside has through hole, an end of described switching member optionally the through hole of the described partition member of opening and closing of fault to open or to disconnect described switch passage.
10. anti-string according to claim 5 is pressed reduction valve, it is characterized in that described switch passage is the passage of straight line type, broken line type or curved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201138340U CN201621338U (en) | 2010-02-08 | 2010-02-08 | Cascade voltage preventing reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201138340U CN201621338U (en) | 2010-02-08 | 2010-02-08 | Cascade voltage preventing reducing valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621338U true CN201621338U (en) | 2010-11-03 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201138340U Expired - Lifetime CN201621338U (en) | 2010-02-08 | 2010-02-08 | Cascade voltage preventing reducing valve |
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| CN (1) | CN201621338U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103090065A (en) * | 2012-12-30 | 2013-05-08 | 张意 | Full-automatic double-side-opened pressure-maintaining unloading safety valve |
| CN104740819A (en) * | 2013-12-25 | 2015-07-01 | 上海金盾消防安全科技有限公司 | Diaphragm type constant-pressure rain falling alarm valve |
| CN106090364A (en) * | 2016-08-26 | 2016-11-09 | 上海康措流体控制有限公司 | Electro hydraulic valve, outlet pressure control system and inlet pressure control system |
| CN110043703A (en) * | 2019-04-29 | 2019-07-23 | 中国水利水电科学研究院 | A kind of design method of piston type guide surge reliever |
| CN110094573A (en) * | 2019-04-29 | 2019-08-06 | 中国水利水电科学研究院 | A kind of design method of diaphragm type guide surge reliever |
| CN112431951A (en) * | 2020-11-12 | 2021-03-02 | 株洲珠华水工业科技开发有限公司 | Multi-period self-adaptive constant-voltage system |
-
2010
- 2010-02-08 CN CN2010201138340U patent/CN201621338U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090065A (en) * | 2012-12-30 | 2013-05-08 | 张意 | Full-automatic double-side-opened pressure-maintaining unloading safety valve |
| CN104740819A (en) * | 2013-12-25 | 2015-07-01 | 上海金盾消防安全科技有限公司 | Diaphragm type constant-pressure rain falling alarm valve |
| CN106090364A (en) * | 2016-08-26 | 2016-11-09 | 上海康措流体控制有限公司 | Electro hydraulic valve, outlet pressure control system and inlet pressure control system |
| CN106090364B (en) * | 2016-08-26 | 2021-08-10 | 上海康措流体控制有限公司 | Electro-hydraulic valve, outlet pressure control system and inlet pressure control system |
| CN110043703A (en) * | 2019-04-29 | 2019-07-23 | 中国水利水电科学研究院 | A kind of design method of piston type guide surge reliever |
| CN110094573A (en) * | 2019-04-29 | 2019-08-06 | 中国水利水电科学研究院 | A kind of design method of diaphragm type guide surge reliever |
| CN110043703B (en) * | 2019-04-29 | 2020-02-14 | 中国水利水电科学研究院 | Design method of piston type pilot water hammer relief valve |
| CN110094573B (en) * | 2019-04-29 | 2020-04-17 | 中国水利水电科学研究院 | Design method of diaphragm type pilot surge relief valve |
| CN112431951A (en) * | 2020-11-12 | 2021-03-02 | 株洲珠华水工业科技开发有限公司 | Multi-period self-adaptive constant-voltage system |
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