CN101055038A - Systematic balance stable-flow valve - Google Patents
Systematic balance stable-flow valve Download PDFInfo
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- CN101055038A CN101055038A CN 200710022144 CN200710022144A CN101055038A CN 101055038 A CN101055038 A CN 101055038A CN 200710022144 CN200710022144 CN 200710022144 CN 200710022144 A CN200710022144 A CN 200710022144A CN 101055038 A CN101055038 A CN 101055038A
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Abstract
The present invention relates to a system balancing flow stabilizing valve in a thermal power plant water vapor sampling apparatus, which is characterized in that it includes a valve seat on which disposed a first valve cavity, a second valve cavity, a sample water inlet, a sampling outlet and an abandon outlet; one end of the first valve cavity is disposed with a hole shape valve port connected to the sample water inlet, another side connects the inlet of the second valve cavity; the head part of a needle type valve spindle is inserted in to the hole shape valve port to form an adjusting valve core, the end of the adjusting valve core is as an operation part which is covered by a cover; one end surface in axial direction of the second valve cavity is disposed with a sampling passage end port connected to the sampling outlet, another end surface is disposed with an abandon passage end port connected to the abandon outlet; the front and rear end surfaces of a block of the head part of a diffluence adjusting valve rod cooperate with the sampling passage end port and the abandon passage port to form a diffluence adjusting valve core. The invention combines an adjusting valve with a diffluence adjusting valve in series, hides the operation part of the adjusting valve in order to prevent that the sampling person and irrelevant person can adjust the flux by themselves and ensure the stability and balance of the flux of the end path of the system.
Description
Technical field
The present invention relates to the special valve in the water and steam sampling apparatus system of a kind of thermal power plant, be specifically related to being used in the water and steam sampling apparatus system of a kind of thermal power plant to control the valve of the manual sample flow of the dead end.
Background technique
Existing thermal power plant all is to produce steam with boiler earlier, drive the generator set generating with the steam pushing turbine again, boiler of wherein using and vapour system all are to work without cessation at 24 hours every day throughout the year, for ensureing the security of operation of boiler and vapour system, need to detect in real time various water sample indexs in boiler and the vapour system, as the water in condensate pump outlet port, the water in oxygen-eliminating device outlet port, the water at economizer exit place, drum boiler water, saturated vapour, the electrical conductivity of a series of steam such as superheated vapor, oxygen content, pH value, phosphate content, indexs such as silicate content.
For detecting these indexs, existing power station all is with a cover thermal power plant water and steam sampling apparatus system, its common structure as shown in Figure 1, its upper end is the interface (interface is arranged among the figure 1 to No. 14) that connects the water sample everywhere in boiler and the vapour system, takes into account manual sampling by the table of bottom from the sample of these interfaces taking-ups after cooling, step-down water sample is carried out chemical analysis and monitoring.See accompanying drawing 1, the dead end (lower end in the drawings) is detected except that telling the table meter detection branch that connects each chemistry table meter 30 in every road in the water and steam sampling apparatus system of thermal power plant, also must be arranged with manual sample tap 31 branch roads, so that manual be sampled to laboratory inspection and check (general per about 4 hours must manual inspection by sampling).By requirement of system design, it is stable that the flow of its each branch of dead end should keep, existing string one common modulating valve 32 on each branch road normally, and all dispose flowmeter and show flow in that table meter 30 places are housed, when moving in system with this, (in general the staff transfers to rated flow by modulating valve 32 with each branch road flow earlier, the rated flow of table meter detection branch is 300ml/min, and the rated flow of manual sample tap branch road is 500ml/min), the water sample of each branch road is outwards dumped with rated flow all the time.
But because present each thermal power plant management system, the management of manual sampling and table meter often adheres to two departments (the chemical department of manual sampling ownership, and meter monitoring of chemistry table and debugging ownership operation thermal technology department) separately.When the sampling personnel of chemical department take a sample by hand, tend to start the modulating valve of manual sample tap branch road is left to maximum (making it to substantially exceed rated flow) for seeking quickness, so that the short time is promptly returned the laboratory chemical examination after finishing sampling, the result will cause the flow in another side meter detection branch significantly to reduce, when serious even do not have a flow, this will influence chemistry table meter and measure, especially for the phosphate radical table, the chemistry table meter that silicate table etc. adopt colorimetric scale to measure, because of the colorimetric scale measuring principle is flow to be transferred to rated flow when the mileometer adjustment, chemical reagent to scale carries out the colorimetric demarcation then, and changes in flow rate is crossed the accuracy that conference influences measurement immediately when measuring, and to electric conductive meter, the serious consequence that tables such as acidometer meter does not have flow also can cause potential electrode to damage suddenly.
Therefore, how can guarantee stable, the balance of the flow of the manual sampling slip of the dead end of water and steam sampling apparatus system and each table meter branch road constantly, the personnel that prevent operate arbitrarily, are a great problems that domestic each power plant faces in sampling.For many years, also once the someone attempts that the dress orifice plate comes current limliting in the modulating valve outlet in manual sample tap branch road, but the aperture on the practice aperture plate easily stops up, and regular meeting's flowing water is not smooth, and operation causes trouble to system.
Summary of the invention
But the present invention is for solving sampling personnel and other unrelated person regulated at will flows that exists in the prior art, and the technical problem that influences the amount degree of accuracy of table instrumentation and cause potential electrode to damage provides a kind of systematic balance stable-flow valve.
For achieving the above object, the technical solution used in the present invention is: a kind of systematic balance stable-flow valve, comprise a valve seat, and which is provided with first valve pocket, second valve pocket, sample water inlet, sampling outlet and dump outlet;
One end of described first valve pocket is established a hole shape valve port and is communicated with the sample water inlet, and the other end is through the inlet of channel connection second valve pocket; One needle type valve bar inserts in first valve pocket, and its conical head stretches into to cooperate with it in the hole shape valve port and constitutes regulating spool, and it is outer as operation unit that its tail end stretches out valve seat;
It is one axial that described second valve pocket is provided with, and establishes the sampling access port on this axial end face, and this sampling access port is communicated with sampling outlet, establishes on the other end and dump access port, and this dumps access port and is communicated with and dumps outlet; One shunting valve bar axially inserts in second valve pocket along second valve pocket, its head block that is connected, this block is between the both ends of the surface of second valve pocket, the front/rear end of block is respectively with the sampling access port with dump access port and cooperates and constitute the shunting valve core, and the tail end of described regulating valve stem stretches out valve seat outward as the operating end;
And, outside the operation unit of needle type valve bar, also cover on the described valve seat and establish a closure body.
Related content in the technique scheme is explained as follows:
1, in the such scheme, described needle type valve bar and shunting valve bar are oppositely arranged, and shunting valve bar tail end operating end is positioned at the valve seat front end, and needle type valve bar tail end operating position is in the rear end of valve seat.Make operative end face on the shunting valve bar of the present invention to the operator after installing with this, the operation unit of its needle type valve bar then stashes at rear side, makes the people be difficult for finding.
2, in the such scheme, equally, increase the trouble that operation unit is regulated for the hiding of the operation unit of needle type valve bar, the tail end at the needle type valve bar is not provided with handwheel, and driver flutes is set on its tail end end face, and make and need use screwdriver tool when regulating, avoid taking a sample and the operating arbitrarily conveniently of unrelated person.This driver flutes specifically can be that a word, cross and utility screwdriver head match, and also can be other special shapes, is matched with it by the special driver bit of special use.
3, in the such scheme, the tail end of described regulating valve stem connects a handwheel, constitutes the operating end with this.
4, in the such scheme, described valve seat is made of the valve body at middle part and the valve gap of rear and front end, specifically is respectively to pass a valve gap in the middle part of described shunting valve bar middle part and the needle type valve bar, and with the valve cover chamber screw-thread fit and be tightly connected.
5, in the such scheme,, the conical surface gradient of the conical head of needle type valve bar can be designed to 2～3 °, reach fine setting effect flow for the precision of regulating flow improves.
6, in the such scheme, closure body can be connected by regular screw threads with valve base chamber, certainly also available special lockset encapsulation connects, make to open and need special key or instrument, and, so just have only these full-time staff can open the operation unit of closing cap operation needle type valve to full-time maintenance and debugging staffing key or instrument that power plant moves department.
Design of the present invention and working principle are: the present invention is in series a regulating spool structure and a shunting valve cored structure and is combined into one, structure is small and exquisite, during work, water inlet is first through regulating spool from the sample water inlet, flows to through the shunting valve core and dumps outlet or sampling outlet.During use, the present invention is substituted existing modulating valve, string is controlled the flow of manual sample tap branch road by it in the manual sample tap branch road of the thermal power plant water and steam sampling apparatus system dead end.
When water and steam sampling apparatus system operation debugging, full-time worker by operation department opens the closing cap of rear end of the present invention, thereby rotate the needle type valve bar with screw-driver and regulate regulating spool, adjust to the rated flow value with dumping the outlet and the total discharge of sampling outlet water outlet, cover closure body then and the operation unit of modulating valve is sealed stash.Like this, for sampling personnel and other irrelevant ignorant personnel, they can not note also having the modulating valve operation unit on the valve body of the present invention, they remove to operate the handwheel that exposes on the positive shunting valve bar at most, and can only regulate the shunting valve core by rotating handwheel, reaching selection is sampling outlet water outlet or the function that dumps the outlet water outlet, and can not change total discharge on the manual sampling slip, this just makes the flow of manual sampling slip can be stabilized in the rated flow value all the time, make it can not to have influence on the flow of the table meter detection branch of opposite side, assurance system reliable operation, the validity of chemistry table instrumentation amount.
Because the technique scheme utilization, the present invention compared with prior art has following advantage and effect:
1, because the present invention is in series a regulating spool structure and a shunting valve cored structure and is combined into one, the operation unit that is connected with regulating spool is stashed by closure body, sampling personnel and other unrelated persons are not known structure in the valve of the present invention, can't notice and also have an operation unit that is connected with regulating spool on the valve body, they remove to operate the handwheel that is connected with the shunting valve core that exposes at most, thereby just operated the shunting valve core, the water outlet of control sampling outlet still dumps the outlet water outlet, and the size of total discharge can not change on the manual sampling slip, this just makes the flow of manual sampling slip can be stabilized in the rated flow value all the time, make it can not to have influence on the flow of the table meter detection branch of opposite side, assurance system reliable operation, the validity of chemistry table instrumentation amount;
2, compact structure of the present invention, profile is small and exquisite, will regulate or shunt the merging of adjusting two functions and be integrated, and working service is convenient.
Description of drawings
Accompanying drawing 1 is the schematic representation of existing thermal power plant water and steam sampling apparatus system;
Accompanying drawing 2 is looked cross-sectional schematic for structure master of the present invention, and the shunting valve core is in the sampling state among the figure;
Accompanying drawing 4 shows analyses and observe intention that for the part of overlooking of accompanying drawing 2 the shunting valve core is in the state of dumping among the figure;
Accompanying drawing 5 is the partial schematic diagram of the dead end part behind utilization the present invention in the water and steam sampling apparatus system of thermal power plant.
In the above accompanying drawing: 1, valve seat; 2, first valve pocket; 3, second valve pocket; 4, sample water inlet; 5, sampling outlet; 6, dump outlet; 7, hole shape valve port; 8, needle type valve bar; 9, conical head; 10, operation unit; 11, sampling access port; 12, dump access port; 13, shunting valve bar; 14, block; 15, handwheel; 16, closure body; 17, driver flutes; 18, valve body; 19, valve gap; 20, valve gap; 21, O type circle; 22, packing ring; 23, inlet attack; 24, blowdown joint; 25, sample connection; 26, gland; 27, passage; 29, systematic balance stable-flow valve of the present invention; 28, passage; 30, chemistry table meter; 31, manual sample tap; 32, modulating valve.
Embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment: shown in accompanying drawing 2～4, a kind of systematic balance stable-flow valve comprises a valve seat 1, and this valve seat 1 is made of the valve body 18 at middle part and the valve gap 19,20 of rear and front end.Described valve seat 1 is provided with first valve pocket 2, second valve pocket 3, sample water inlet 4, sampling outlet 5 and dumps outlet 6.Described valve body 18 is cylindric, and first valve pocket 2 is for being opened in the circular groove on valve body 18 rear ends, and second valve pocket 3 is for being opened in the circular groove on valve body 18 front ends.And the front end that valve gap 19 is embedded in valve body 18 is 3 sealings of second valve pocket, and 18 of valve gap 19 and valve bodies are tightly connected with O type circle 21, and valve gap 20 is embedded in the rear end of valve body 18 first valve pocket 2 is sealed, and 18 of valve gap 20 and valve bodies also are tightly connected with O type circle 21.Described sample water inlet 4, sampling outlet 5 and dump outlet and 6 respectively directly upwards pick out by inlet attack 23, sample connection 25 and blowdown joint 24 circumferential surface by valve body 18.
Shown in accompanying drawing 2～4, establish a hole shape valve port 7 on the front-end face of described first valve pocket 2, this hole shape valve port 7 is communicated with sample water inlet 4 through passage 27, and the opposite side of first valve pocket 2 (being on the circumferential surface of first valve pocket on the figure) is communicated with the inlet of second valve pocket 3 through passage 28; One needle type valve bar 8 from after insert in first valve pocket 2 through valve gap 20 forward, its conical head 9 stretches into to cooperate with it in the hole shape valve port 7 and constitutes regulating spool, its middle part cooperates with right-handed thread with valve gap 20 and is tightly connected with it through O type circle 21 and packing ring 22, its tail end is stretched in outside the valve gap 20, (the driver flutes 17 here is an in-line as operation unit 10 with this to offer driver flutes 17 on the tail end end face, can operate with common straight screwdriver, certainly in the practical application, also can be designed to other various shapes, as long as the corresponding driver bit of exploitation matches with it).Be arranged with gland 26 again on described valve gap 20 rear ports, locate O type circle 21 and packing ring 22 with this.
Shown in accompanying drawing 2～4, dump access port 12 and be communicated with and dump outlet 6 around circumferentially offering four common sampling outlets 5 that are communicated with of sampling access ports 11, establishing on the central position of ear end face relatively on the front-end face of described second valve pocket 3.One shunting valve bar 13 is axially inserted in second valve pocket 3 through valve gap 19 along second valve pocket 3 in the past backward, its head block 14 that is connected, this block 14 is between the both ends of the surface of second valve pocket 3, the front/rear end of block 14 is respectively with four sampling access ports 11 with dump access port 12 and alternately stop and cooperates formation shunting valve core, the middle part of shunting valve bar 13 and valve gap 19 are tightly connected with left hand thread engagement and by O type circle 21, and its tail end is stretched in outside the valve gap 19 and is connected with a handwheel 15.
Shown in accompanying drawing 2～4, the rear end of described valve body 18 also is covered with a closure body 16 on the operation unit 10 of needle type valve bar 8, these 18 rear ends of this closure body 16 and valve along between to be threaded.
Shown in accompanying drawing 2, handwheel 15 on described shunting valve bar 13 tail ends is positioned at the front end (front side when right side shown in Figure 2 is user mode of valve seat 1, oriented manipulation person's a side), needle type valve bar 8 tail end operation units 10 are positioned at the rear end (rear side when left side shown in Figure 2 is user mode is carried operator's a side) of valve seat 1.The conical surface gradient of the conical head 9 of described needle type valve bar 8 is 2～3 °, to improve the degree of regulation of regulating spool.
In actual use, by accompanying drawing 5 systematic balance stable-flow valve of the present invention 29 is substituted in the manual sample tap branch road of the dead end in the water and steam sampling apparatus system that existing modulating valve are serially connected in the thermal power plant.When chemistry table meter puts into operation, shown in accompanying drawing 2～4, the full-time worker of operation department opens the closure body 16 at valve body of the present invention 1 back side, operation unit 10 on the screw-driver metering needle type valve rod 8, after the total discharge of manual sampling slip is adjusted to 500ml/min, again closure body 16 is screwed on.The personnel that so no matter to take a sample open handwheel 15 big or turn down, and are always 500ml/min on its flow, therefore do not influence the flow on chemical instruments road, have reached the purpose of flow system flow balance.
The foregoing description only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalences that spirit is done according to the present invention change or modify, and all should be encompassed within protection scope of the present invention.
Claims (6)
1, a kind of systematic balance stable-flow valve is characterized in that: comprise a valve seat [1], which is provided with first valve pocket [2], second valve pocket [3], sample water inlet [4], sampling outlet [5] and dump outlet [6];
One end of described first valve pocket [2] is established a hole shape valve port [7] and is communicated with sample water inlet [4], and the other end is through the inlet of channel connection second valve pocket [3]; One needle type valve bar [8] inserts in first valve pocket [2], and its conical head [9] stretches into to cooperate with it in the hole shape valve port [7] and constitutes regulating spool, and it is outer as operation unit [10] that its tail end stretches out valve seat [1];
It is one axial that described second valve pocket [3] is provided with, and establishes sampling access port [11] on this axial end face, and this sampling access port [11] is communicated with sampling outlet [5], establishes on the other end and dump access port [12], and this dumps access port [12] and is communicated with and dumps outlet [6]; One shunting valve bar [13] axially inserts in second valve pocket [3] along second valve pocket [3], its head block [14] that is connected, this block [14] is positioned between the both ends of the surface of second valve pocket [3], the front/rear end of block is respectively with sampling access port [11] with dump access port [12] and cooperates formation shunting valve core, and the tail end of described regulating valve stem [13] stretches out valve seat [1] outward as the operating end;
And described valve seat [1] is gone up also to cover outside the operation unit [10] of needle type valve bar [8] and is established a closure body [16].
2, systematic balance stable-flow valve according to claim 1, it is characterized in that: described needle type valve bar [8] is oppositely arranged with shunting valve bar [13], shunting valve bar [13] tail end operating end is positioned at valve seat [1] front end, and needle type valve bar [8] tail end operation unit [10] is positioned at the rear end of valve seat [1].
3, systematic balance stable-flow valve according to claim 1 is characterized in that: driver flutes [17] is set on the tail end end face of described needle type valve bar [8], constitutes operation unit [10] with this.
4, systematic balance stable-flow valve according to claim 1 is characterized in that: the tail end of described regulating valve stem [13] connects a handwheel [15], constitutes the operating end with this.
5, systematic balance stable-flow valve according to claim 1, it is characterized in that: described valve seat [1] is made of the valve body [18] at middle part and the valve gap [19,20] of rear and front end, in the middle part of described shunting valve bar [13] middle part and the needle type valve bar [8] specifically is respectively to pass a valve gap, and with the valve cover chamber screw-thread fit and be tightly connected.
6, systematic balance stable-flow valve according to claim 1 is characterized in that: the conical surface gradient of the conical head [9] of described needle type valve bar [8] is 2～3 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100221447A CN100458245C (en) | 2007-04-29 | 2007-04-29 | Systematic balance stable-flow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100221447A CN100458245C (en) | 2007-04-29 | 2007-04-29 | Systematic balance stable-flow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101055038A true CN101055038A (en) | 2007-10-17 |
| CN100458245C CN100458245C (en) | 2009-02-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100221447A Expired - Fee Related CN100458245C (en) | 2007-04-29 | 2007-04-29 | Systematic balance stable-flow valve |
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| CN (1) | CN100458245C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098160A (en) * | 2020-08-14 | 2020-12-18 | 中国神华能源股份有限公司国华电力分公司 | Steam sampling device and steam sampling system of thermal power plant |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1251938B (en) * | 1991-10-17 | 1995-05-27 | Enichem Agricoltura Spa | DEVICE FOR PULSED DISPENSING OF AN IRRIGATION LIQUID AND IRRIGATION SYSTEMS THAT INCORPORATE THE DEVICE |
| IT1261258B (en) * | 1993-09-13 | 1996-05-09 | Dromont Meccanica Srl | DOSING VALVE FOR AUTOMATIC DOSING DEVICE FOR FLUIDS, IN PARTICULAR INDUSTRIAL PAINTS |
| CN2367854Y (en) * | 1999-04-05 | 2000-03-08 | 江苏省国营淮海石油机械厂 | Constant-flow regulation valve |
| JP2001208225A (en) * | 2000-01-27 | 2001-08-03 | Inax Corp | Water discharge instrument having temperature control valve |
| CN2432410Y (en) * | 2000-08-14 | 2001-05-30 | 苏州市中新动力设备辅机有限公司 | Fully automatic constant flow pressure reducing valve |
| CN2486792Y (en) * | 2001-06-04 | 2002-04-17 | 刘涛 | Anti-theft sampling valve |
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2007
- 2007-04-29 CN CNB2007100221447A patent/CN100458245C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098160A (en) * | 2020-08-14 | 2020-12-18 | 中国神华能源股份有限公司国华电力分公司 | Steam sampling device and steam sampling system of thermal power plant |
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| Publication number | Publication date |
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| CN100458245C (en) | 2009-02-04 |
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Owner name: SUZHOU ZHONGXIN POWER TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SUZHOU ZHONGXIN POWER APPARATUS AUXILIARY EQUIPMENT CO., LTD. |
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Address after: 215031. B1 building, Mei Xiang Industrial Zone, Suzhou Industrial Park, Jiangsu, Suzhou Patentee after: Suzhou Zhongxin Power Polytron Technologies Inc. Address before: 215031. B1 building, Mei Xiang Industrial Zone, Suzhou Industrial Park, Jiangsu, Suzhou Patentee before: Suzhou Zhongxin Dynamic Equipment Auxiliary Co., Ltd. |
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Granted publication date: 20090204 Termination date: 20210429 |