CN202926598U - Self-propelling automatic re-circulating pump protection valve - Google Patents
Self-propelling automatic re-circulating pump protection valve Download PDFInfo
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- CN202926598U CN202926598U CN 201220616966 CN201220616966U CN202926598U CN 202926598 U CN202926598 U CN 202926598U CN 201220616966 CN201220616966 CN 201220616966 CN 201220616966 U CN201220616966 U CN 201220616966U CN 202926598 U CN202926598 U CN 202926598U
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- bypass
- valve
- self
- spring
- flow channel
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Abstract
The utility model relates to a self-propelling automatic re-circulating pump protection valve, which comprises a valve body and a valve cover, wherein the valve body is provided with a main runner inlet, a main runner outlet and an assembling port, the valve cover is in sealing connection with the assembling port, and the self-propelling automatic re-circulating pump protection valve also comprises a spring, a non-return valve clack, a valve core and a bypass flange, one end of the spring is connected with the inner side of the valve cover, the non-return valve clack is provided with a bypass runner, the valve core consists of a stroke section and a bypass section, and the bypass flange is provided with a bypass runner outlet; and the other end of the spring is connected with the non-return valve clack, the non-return valve clack is also provided with a decompression hole, the stroke section of the valve core is arranged in the bypass runner, the bypass section of the valve core is provided with a bypass water passenger and at least one throttling hole, the valve body is also provided with a bypass assembling port, the bypass flange is connected with the bypass assembling port in a sealing way, and the decompression hole, the throttling hole, the bypass water passage and the bypass runner outlet are sequentially communicated with one another. The self-propelling automatic re-circulating pump protection valve is compact in structure, free from additional power supply and control signal as well as an actuation mechanism, capable of automatically running, convenient to install, capable of being maintained online and convenient to maintain.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of for the self-powering type automatic recirculating pump-protecting valve in liquid conveying system automatic recirculating pump protective system.
Background technique
The recirculating pump Protective valve also claims check valve, minimum flow valve, is the Special valve that is applicable to the feed water pump recirculating system, usually is arranged on the feed water pump outlet, is widely used in the industrial fields such as power plant, steel mill and chemical plant.
Particularly in the thermal power plant, the industrial fields such as steel mill, chemical plant, use boiler feed pump to use more, as Important Auxiliary equipment, direct relation the factory safety economical operation.Feed water pump is except having rational structure, strict manufacturing process and good material, and its cavitation resistive property is also one of main performance of feed water pump, because it is not only determining the operating range of feed water pump, but also affects the working life of pump.
For preventing the overheated or cavitation of feed water pump, the flow of feed water pump under any circumstance all must be not less than the safe traffic of some regulations, namely minimum discharge.For the minimum discharge backwater of realizing system normally moves required minimum discharge with holding pump, and prevent that medium from flowing backwards, prevent from cavitating, water hammer, vibration etc. are to the destruction of pump, improve the utilization efficiency of pump, reduce the fault of pump, need in the feed water pump outlet, the system that follows again to be installed.
Existing recirculating system is following function because needs possess: flow measurement, check valve, decompression drain charge and Flow-rate adjustment, therefore whole recirculating system comprises the mechanisms such as flowmeter, control loop, minimum flow regulating valve, electronic (or pneumatic) actuator, safety check, need manual tune in using process, need the actuators such as additional supply and control signal, and need additional power source, not only complicated operation, and installation and maintenance is very inconvenient.
Summary of the invention
The purpose of this utility model is in order to overcome defects, provide a kind of simple in structure, design is ingenious, integrate flow measurement, check valve, decompression drain charge and Flow-rate adjustment, self-powering type automatic recirculating pump-protecting valve simple to operate, easy to maintenance.
For achieving the above object, the self-powering type automatic recirculating pump-protecting valve of the utility model design, the valve gap that comprises the valve body that is provided with the outlet of sprue import, sprue and installation opening, is tightly connected with installation opening, the spool that also comprises the inboard spring that is connected of an end and described valve gap, the check flap that is provided with bypass flow channel, consisted of by trip segment and bypass section, and be provided with the bypass flange that bypass flow channel exports; The other end of described spring is connected with the check flap, described check flap also is provided with the decompression perforate, the trip segment of described spool is positioned at bypass flow channel, the bypass section of described spool is provided with bypass water channel and at least one throttling perforate, described valve body also is provided with the bypass installation opening, described bypass flange and bypass installation opening are tightly connected, and described decompression perforate, throttling perforate, bypass water channel and bypass flow channel outlet are communicated with successively.
The external diameter of above-mentioned trip segment is less than the internal diameter of bypass flow channel, and the outside of trip segment is provided with the annular guide ledges that matches with the bypass flow channel inwall, and described guide ledges is provided with water flow hole.
Above-mentioned valve gap inboard is provided with spring housing, and described spring is positioned at spring housing.
The utility model self-powering type automatic recirculating pump-protecting valve is with design cleverly; the function that adopts simple structure that a plurality of parts in prior art are possessed is integrated in the circulating valve of a mechanical structure; rely on flow control valve; do not need the extra energy; but realized the bypass flow auto-adjustment control, the valve overall operation has high Economy, especially in manufacturing, Installation and Debugging; and safeguarding of later stage has significant overall cost advantage in the aspect.The utility model realizes that the protection of pump only needs a circulating valve, does not need other additional assemblies, therefore not affected by the system failure, and is almost non-maintaining.
Its major advantage is as follows:
1, Minimum Flow Control, by-pass reducing, main flow non-return triple functions are integrated in one, be skillfully constructed, simple in structure, intensive simplification minimum flow control system, save electronic or pneumatic modulating valve, a cover flow measuring and controlling system and the safety check that arranges separately of a cover, reduced the cost of investment of equipment.
2, sprue is adopted as spring-loaded Lift check valve, the open and close of bypass and sprue are only relevant with the pump discharge flow, the open and close of sprue and bypass flow channel outlet is automatically controlled by flow and is completed, and whole decompression process is completed in spool, valve body is not washed away, valve flows steadily, and is smooth and easy;
3, safety check is built in valve body, the energy free loss; On spool, the throttling perforate is calculated, is tested through strict, can avoid the generation of overheated steam flashing fully;
4, compact structure need not additional supply and control signal, does not also need actuator automatically to move, and is easy for installation, but on-line maintenance, and it is convenient to safeguard.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is check flap of the present utility model (8) structural representation;
Fig. 3 is spool of the present utility model (9) structural representation;
Fig. 4 is that use of the present utility model is at the schematic diagram of pump circulatory system the inside;
In figure: the (1.1-sprue import of 1-valve body; 1.2-sprue outlet; 1.3-installation opening), 2-valve gap (2.1-spring housing), 3-nut, 4-double-screw bolt, 5-packing ring, 6-spring, the 7-the one O RunddichtringO, 8-check flap (8.1-bypass flow channel; 8.2-decompression perforate), 9-spool (9.1-trip segment; 9.2-bypass section; 9.2.1-bypass water channel; 9.2.2-throttling perforate; 9.3-guide ledges; 9.3.1-water flow hole), 10-bypass flange (outlet of 10.1-bypass flow channel), the 11-the second O-ring seals, 12-pump, 13-liquid container.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Self-powering type automatic recirculating pump-protecting valve as shown in Figure 1, the valve gap 2 that comprises the valve body 1 that is provided with the outlet 1.2 of sprue import 1.1, sprue and installation opening 1.3, is tightly connected with installation opening 1.3, the spool 9 that also comprises the inboard spring 6 that is connected of an end and valve gap 2, the check flap 8 that is provided with bypass flow channel 8.1, consisted of by trip segment 9.1 and bypass section 9.2, and be provided with bypass flow channel and export 10.1 bypass flange 10; The other end of spring 6 is connected with check flap 8, check flap 8 also is provided with decompression perforate 8.2, the trip segment 9.1 of spool 9 is positioned at bypass flow channel 8.1, the bypass section 9.2 of spool 9 is provided with bypass water channel 9.2.1 and a plurality of throttling perforate 9.2.2, spool 9 is provided with two or more throttling perforate 9.2.2, and throttling perforate 9.2.2 evenly is arranged on the same peripheral wall of spool 9; Valve body 1 also is provided with bypass installation opening 1.4, and bypass flange 10 is tightly connected with bypass installation opening 1.3, and decompression perforate 8.2, throttling perforate 9.2.2, bypass water channel 9.2.1 and bypass flow channel outlet 10.1 are communicated with successively.
The external diameter of trip segment 9.1 is less than the internal diameter of bypass flow channel 8, and the outside of trip segment 9.1 is provided with the annular guide ledges 9.3 that matches with bypass flow channel 8 inwalls, and guide ledges 9.3 is provided with water flow hole 9.3.1.Valve gap 2 inboards are provided with spring housing 2.1, and spring 6 is positioned at spring housing 2.1.
Be provided with an O RunddichtringO 7 between valve gap 2 outsides and valve body 1, be provided with the 2nd O RunddichtringO 11 between bypass flange 10 outsides and valve body 1, are connected with packing ring by nut 3, double-screw bolt 4 between valve gap 2 and valve body 1 and are connected.
In the present embodiment, main structure parameters is set to the nominal size DN15-400 of Global Macros valve; bypass size: 1/2 DN or press system requirements and calculate and decide; nominal pressure: PN1.0-42.0MPa; recommend flow velocity: 4-8 meter per seconds; Applicable temperature:＜=80 ℃; Applicable media: the chemical mediators such as the liquefied ammonia such as industry water, oil, methyl alcohol, rich methanol, the Protective valve working principle is:
The utility model is applied in liquid conveying system; as the recirculating pump protective system; as shown in Figure 4; liquid medium enters in valve body 1 through the sprue import 1.1 on valve body 1; by spool 9 inductive flow sizes; when pump 12 rates of discharge during less than set definite value, liquid medium namely reduces pressure by the small-sized throttling perforate 9.2.2 on spool 9 and regulates passage and do bypass circuit.When setting flow, the liquid medium in liquid container 13 enters sprue outlet 1.2 and closes gradually bypass, carries out proper flow when pump 12 rates of discharge.The open and close of its bypass and sprue are only relevant with pump 12 rates of discharge.When the sprue outlet 1.2 of valve had fluid to flow backwards, check flap 8 overcame active force and the deadweight of spring 6 and opens check valve, and the reverse action of spool 9 becomes the working procedure of check valve.
Its working procedure is as follows:
When 1, feed water pump started, main pipe check flap 8 was in closed condition under the effect that active force and the check flap 8 of spring 6 are conducted oneself with dignity, and bypass system is in fully open position, guarantees enough backflows of pump.
2, when the feed water pump rate of discharge when setting flow, sprue import 1.1 hydrodynamic pressures overcome spring force and 8 deadweights of check flap and open gradually safety check, simultaneously, spool 9 is thrown off check flaps 8, bypass flow channel outlet 10.1 recirculating masses reduce gradually.
3, when feed water pump works, sprue import 1.1 hydrodynamic pressures are opened safety check (check flap 8 is to moving near valve gap 2 places) fully, and bypass flow channel outlet 10.1 is closed fully.
4, when operating mode changed or be abnormal, along with the variation of sprue import 1.1 flows, check flap 8 was in different positions, regulated the flow of bypass flow channel outlet 10.1 by the throttling perforate 9.2.2 on spool 9, made it to satisfy the minimum discharge of feed water pump.
5, when feed water pump is out of service, sprue import 1.1 flows reduce, and check flap 8 is closed under the Gravitative Loads of spring force and check flap 8, prevents that fluid countercurrent current is to the damage of pump.
The utility model in one, has been saved Various Components with flow perception, safety check, by-pass governing, four kinds of functions of throttling spool perforate step-down, reduces the cave corrosion, reduces and leaks, and guarantees the water pump normal operation, saves operating cost, and larger promotional value is arranged.
Claims (3)
1. self-powering type automatic recirculating pump-protecting valve comprises the valve body (1) that is provided with sprue import (1.1), sprue outlet (1.2) and installation opening (1.3), and the valve gap (2) that is tightly connected of installation opening (1.3), it is characterized in that:
Also comprise the inboard spring (6) that is connected of an end and described valve gap (2), the check flap (8) that is provided with bypass flow channel (8.1), by the spool (9) of trip segment (9.1) and bypass section (9.2) formation, and be provided with the bypass flange (10) that bypass flow channel exports (10.1);
the other end of described spring (6) is connected with check flap (8), described check flap (8) also is provided with decompression perforate (8.2), the trip segment (9.1) of described spool (9) is positioned at bypass flow channel (8.1), the bypass section (9.2) of described spool (9) is provided with bypass water channel (9.2.1) and at least one throttling perforate (9.2.2), described valve body (1) also is provided with bypass installation opening (1.4), described bypass flange (10) is tightly connected with bypass installation opening (1.4), described decompression perforate (8.2), throttling perforate (9.2.2), bypass water channel (9.2.1) and bypass flow channel outlet (10.1) are communicated with successively.
2. self-powering type automatic recirculating pump-protecting valve according to claim 1; it is characterized in that: the external diameter of described trip segment (9.1) is less than the internal diameter of bypass flow channel (8); and the outside of trip segment (9.1) is provided with the annular guide ledges (9.3) that matches with bypass flow channel (8) inwall, and described guide ledges (9.3) is provided with water flow hole (9.3.1).
3. self-powering type automatic recirculating pump-protecting valve according to claim 1 and 2 is characterized in that: described valve gap (2) inboard is provided with spring housing (2.1), and described spring (6) is positioned at spring housing (2.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616966 CN202926598U (en) | 2012-11-20 | 2012-11-20 | Self-propelling automatic re-circulating pump protection valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616966 CN202926598U (en) | 2012-11-20 | 2012-11-20 | Self-propelling automatic re-circulating pump protection valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202926598U true CN202926598U (en) | 2013-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220616966 Expired - Fee Related CN202926598U (en) | 2012-11-20 | 2012-11-20 | Self-propelling automatic re-circulating pump protection valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202926598U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806481A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | CO compressor air valve for HYCO device |
| CN105719705A (en) * | 2014-12-01 | 2016-06-29 | 上海核工程研究设计院 | Outlet connection pipe in pressurized water reactor integral hydraulic simulation test |
-
2012
- 2012-11-20 CN CN 201220616966 patent/CN202926598U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104806481A (en) * | 2014-01-24 | 2015-07-29 | 上海华林工业气体有限公司 | CO compressor air valve for HYCO device |
| CN105719705A (en) * | 2014-12-01 | 2016-06-29 | 上海核工程研究设计院 | Outlet connection pipe in pressurized water reactor integral hydraulic simulation test |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130508 Termination date: 20171120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |