CN112901838A - Self-operated regulating valve capable of automatically switching pressure difference values - Google Patents
Self-operated regulating valve capable of automatically switching pressure difference values Download PDFInfo
- Publication number
- CN112901838A CN112901838A CN202110125881.XA CN202110125881A CN112901838A CN 112901838 A CN112901838 A CN 112901838A CN 202110125881 A CN202110125881 A CN 202110125881A CN 112901838 A CN112901838 A CN 112901838A
- Authority
- CN
- China
- Prior art keywords
- pressure
- valve
- self
- automatically switching
- adjusting mechanism
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/24—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member
- F16K17/28—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only
- F16K17/30—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting directly on the cutting-off member operating in one direction only spring-loaded
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention relates to a self-operated regulating valve capable of automatically switching pressure difference values, which comprises a temperature sensing bulb for sensing the heat of return water, an adjusting mechanism capable of moving up and down under the driving of pressure and a pressure difference diaphragm capable of being pushed by the adjusting mechanism to adjust the opening degree of a valve, wherein a working agent capable of generating pressure through evaporation is filled in the temperature sensing bulb, and the temperature sensing bulb provides pressure for the adjusting mechanism. The invention senses the heat of the backwater through the thermometer bulb, generates steam pressure through the filled working agent and provides the steam pressure for the adjusting mechanism, and then the adjusting mechanism acts on the differential pressure diaphragm to adjust the opening of the valve so as to complete automatic switching of the differential pressure value.
Description
Technical Field
The invention relates to the technical field of pressure difference value regulating valves in air-conditioning water systems, in particular to a self-operated regulating valve capable of automatically switching pressure difference values.
Background
Along with the requirements of an energy-saving system of an air conditioner are more and more emphasized, meanwhile, the requirements of an indoor environment are more and more high, the stability requirements of a water system of the air conditioner are more strict, no valve can well complete the function of switching the pressure difference between a heat supply season and a cold supply season at present, a pressure difference sensor and a control electric valve system are used in the prior art, but the pressure difference sensor and the control electric valve system are complex and need to be connected with an external power supply, the debugging cost is increased, and the overall cost is high.
Disclosure of Invention
The invention aims to provide a self-operated regulating valve capable of automatically switching differential pressure values, which can at least solve part of defects in the prior art.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions: the self-operated regulating valve capable of automatically switching the pressure difference value comprises a temperature sensing bag for sensing the heat of return water, an adjusting mechanism capable of moving up and down under the driving of the pressure and a pressure difference membrane capable of being pushed by the adjusting mechanism to adjust the opening degree of the valve, wherein a working agent capable of generating pressure through evaporation is filled in the temperature sensing bag, and the temperature sensing bag provides the pressure for the adjusting mechanism.
Furthermore, the adjusting mechanism comprises a vertically arranged valve rod, a bellows expansion box sleeved on the valve rod in a sliding manner, and a valve core arranged at the lower end of the valve rod, wherein a pressure difference diaphragm horizontally arranged is arranged above the valve core on the valve rod, a spring is arranged between the pressure difference diaphragm and the bellows expansion box, one end of the spring is connected to the bellows expansion box, and the other end of the spring is connected to the pressure difference diaphragm.
Further, the corrugated pipe expansion box is connected with the thermal bulb through a temperature pressure guide pipe.
Furthermore, the temperature pressure guide pipe is a thin copper pipe.
Furthermore, the adjusting mechanism also comprises a hand wheel arranged at the upper end of the valve rod.
Further, the temperature-sensing device also comprises a pressure conduit which can be connected with a water supply pipeline and leads the return water to the temperature-sensing bulb.
Further, the pressure conduit has a connection to a water supply line.
Further, the pressure conduit is provided with an exhaust port.
Further, the pressure difference adjusting device also comprises a pressure difference adjusting screw for adjusting the difference value of the pressure difference.
Further, the working agent is diethyl ether.
Compared with the prior art, the invention has the beneficial effects that: the utility model provides an automatic switch pressure difference value's formula of relying on oneself governing valve, come the heat of perception return water and produce steam pressure and provide guiding mechanism through its filled working medium through the thermometer bulb, then adjust the aperture of valve on the pressure difference diaphragm by guiding mechanism effect, and then accomplish the automatic switch pressure difference value, whole governing valve simple structure, the security is high, and is practical reliable, and the field installation also conveniently need not external power source and inserts, the debugging expense has been saved, reduce autonomous system's input, increase the reliability of valve, realize carrying out the automatic switch-over in season, effectively reduce the phenomenon of the large-traffic low difference in temperature of air conditioner water, reduce the imbalance and the disequilibrium of system simultaneously.
Drawings
Fig. 1 is a schematic view of a self-operated regulator for automatically switching a differential pressure value according to an embodiment of the present invention;
in the reference symbols: 1-hand wheel; 2-a valve stem; 3-bellows expansion box; 4-a spring; 5-a differential pressure diaphragm; 6-temperature sensing bag; 7-a valve core; 8-interface; 9-an exhaust port; 10-a valve body; 11-temperature pressure pipe; 12-differential pressure adjusting screw.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a self-operated regulating valve for automatically switching a pressure difference value is provided in a two-pipe heating and cooling air conditioning water system, and includes a thermal bulb 6 for sensing heat of return water, an adjusting mechanism capable of moving up and down under the driving of pressure, and a pressure difference diaphragm 5 capable of being pushed by the adjusting mechanism to adjust an opening degree of a valve, wherein a working agent capable of evaporating to generate pressure is filled in the thermal bulb 6, and the thermal bulb 6 provides pressure for the adjusting mechanism. In the embodiment, the temperature of the backwater is sensed through the temperature bulb, the steam pressure is generated through the filled working agent and is supplied to the adjusting mechanism, then the opening degree of the valve is adjusted by the adjusting mechanism acting on the pressure difference diaphragm 5, and then the automatic switching of the pressure difference value is completed. Specifically, the thermal bulb 6 is an existing component, a working agent such as diethyl ether and other liquid is arranged in the thermal bulb, pressure can be generated through evaporation and transmitted to the adjusting mechanism, then the adjusting mechanism pushes the differential pressure diaphragm 5 to adjust the opening degree of the valve, the whole structure adopts common components, cost can be effectively controlled, a control system is not involved, power is not supplied, safety is higher and more reliable, and field installation is very convenient.
In order to optimize the above scheme, please refer to fig. 1, the adjusting mechanism includes a valve rod 2 vertically disposed, a bellows expansion box 3 slidably sleeved on the valve rod 2, and a valve core 7 disposed at a lower end of the valve rod 2, the valve rod 2 above the valve core 7 is provided with the pressure difference diaphragm 5 horizontally disposed, a spring 4 is disposed between the pressure difference diaphragm 5 and the bellows expansion box 3, one end of the spring 4 is connected to the bellows expansion box 3, and the other end is connected to the pressure difference diaphragm 5. In this embodiment, the adjustment mechanism is detailed above, wherein the bellows expansion box 3 is a prior art one, and can contract and expand under the driving of pressure and move along the valve rod 2, so as to compress or stretch the spring 4, and the spring 4 acts on the differential pressure diaphragm 5, so that the adjustment can be realized. When being in the season of supplying cold, because the temperature sensing package 6 of return water experiences the temperature very low (about 12 ℃), the inside pressure of bellows expansion box 3 is lower, bellows expansion box 3 contracts and pushes down the pressure differential of spring 4 increase pressure differential diaphragm 5 both sides, and when being in the season of supplying heat because the temperature that temperature sensing package 6 of return water experienced is higher (50 ℃), the inside pressure of bellows expansion box 3 is higher, and bellows expansion box 3 extension spring 4 reduces the pressure value of pressure differential diaphragm 5 both sides, and then realizes supplying cold season and the free switching pressure differential in heat supply season. The valve is controlled according to the pressure difference value formed by the spring 4, and the pressure difference of the rear end is controlled, so that the pressure difference of the inlet and the outlet of the pipeline is ensured. The pressing spring 4 is pushed in the season switching process, the pressure of the spring 4 is released and pressurized, and therefore the pressure difference of the pipeline is adjusted.
Further optimizing the above scheme, please refer to fig. 1, the bellows expansion box 3 is connected to the thermal bulb 6 through a temperature pressure pipe 11. The temperature pressure guide pipe 11 is a thin copper pipe. In this embodiment, the connection to the inside of the bulb 6 mounted on the valve seat can be made by a thin and at the same time flexible copper tube. Preferably the valve seat is a plain cast iron valve seat.
As an optimized scheme of the embodiment of the present invention, please refer to fig. 1, the adjusting mechanism further includes a hand wheel 1 disposed at an upper end of the valve rod 2. In the present embodiment, the handwheel 1 is conventional in the art and can be rotated to adjust the extension and retraction of the valve stem 2. The pressure difference can be set through the hand wheel 1, and during debugging, the conversion between a heat supply season and a cold supply season is not needed. When in use, the temperature pressure guide pipe 11 is connected with a water supply pipeline, and then the air in the valve body 10 is emptied.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1, the regulating valve further includes a pressure conduit capable of receiving a water supply pipeline, and the pressure conduit guides the return water to the thermal bulb 6. The pressure conduit has a connection 8 to a water supply pipe. The pressure conduit is provided with an exhaust port 9. In this embodiment, this valve is installed on the return water pipeline, and on interface 8 directly received the water supply pipe, through the pressure of temperature pressure pipe 11 transmission water supply pipe, then carries out adjusting valve's aperture through pressure differential diaphragm 5. This valve helps the pressure difference of the air-conditioning cold and hot water system to be adjusted in the cooling season and the heating season by means of a bulb 6, wherein:
the loop pressure difference of the air-conditioning water in summer is as follows: Δ px＝(p1x-p2x)，
The differential pressure of the differential pressure diaphragm 5 is: fx＝(p1x-p2x)A＝kxx，
The pressure difference of the air conditioning water loop in winter is delta pd＝(p1d-p2d)，
The pressure difference of the differential pressure diaphragm 5 is Fd＝(p1d-p2d)A＝kxd，
Can obtain Δ px-Δpd＝k(xx-xd)。
The pressure difference of the air conditioning water can be changed by only moving the compression amount of the spring 4, and the displacement adjustment of the spring 4 on the upper part of the valve plate is realized by the expansion and the contraction of the corrugated pipe caused by the pressure generated by the temperature sensing bulb 6 for sensing the temperature of cold water and hot water. The pressure difference on both sides of the pressure difference diaphragm 5 is reset, and different pressure differences of the circulating pipeline in different cold and hot seasons are formed.
As an optimized solution of the embodiment of the present invention, please refer to fig. 1, the regulating valve further includes a differential pressure regulating screw 12 for regulating the differential pressure. In this embodiment, the valve is used in a water return pipeline of an air-conditioning water system, different required pressure differences of cold water or hot water of the air-conditioning water system are set by primarily setting the set pressure of the hand wheel 1, then the difference value of two pressure differences of a cooling season and a heating season is adjusted by adjusting the pressure difference adjusting screw 12 (which can be adjusted in the valve assembling process according to the design), and then the valve is directly installed on the system.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an automatic switch over differential pressure value's self-operated regulator which characterized in that: the device comprises a temperature sensing bulb for sensing the heat of return water, an adjusting mechanism capable of moving up and down under the driving of pressure and a pressure difference diaphragm capable of being pushed by the adjusting mechanism to adjust the opening degree of a valve, wherein a working agent capable of evaporating to generate pressure is filled in the temperature sensing bulb, and the temperature sensing bulb provides pressure for the adjusting mechanism.
2. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 1, wherein: the adjusting mechanism comprises a vertically arranged valve rod, a bellows expansion box sleeved on the valve rod in a sliding mode and a valve core arranged at the lower end of the valve rod, wherein a pressure difference diaphragm is horizontally arranged on the valve rod above the valve core, a spring is arranged between the pressure difference diaphragm and the bellows expansion box, one end of the spring is connected to the bellows expansion box, and the other end of the spring is connected to the pressure difference diaphragm.
3. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 2, wherein: the corrugated pipe expansion box is connected with the thermal bulb through a temperature pressure guide pipe.
4. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 3, wherein: the temperature pressure guide pipe is a thin copper pipe.
5. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 2, wherein: the adjusting mechanism further comprises a hand wheel arranged at the upper end of the valve rod.
6. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 1, wherein: the temperature sensing device also comprises a pressure conduit which can be connected with a water supply pipeline and leads the return water to the temperature sensing bulb.
7. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 6, wherein: the pressure conduit has a connection to a water supply line.
8. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 6, wherein: the pressure conduit is provided with an exhaust port.
9. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 1, wherein: the pressure difference adjusting screw is used for adjusting the difference value of the pressure difference.
10. A self-operated regulator valve for automatically switching differential pressure values as defined in claim 1, wherein: the working agent is diethyl ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125881.XA CN112901838A (en) | 2021-01-29 | 2021-01-29 | Self-operated regulating valve capable of automatically switching pressure difference values |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110125881.XA CN112901838A (en) | 2021-01-29 | 2021-01-29 | Self-operated regulating valve capable of automatically switching pressure difference values |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112901838A true CN112901838A (en) | 2021-06-04 |
Family
ID=76120966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110125881.XA Pending CN112901838A (en) | 2021-01-29 | 2021-01-29 | Self-operated regulating valve capable of automatically switching pressure difference values |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112901838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566004A (en) * | 2021-06-07 | 2021-10-29 | 中建三局第三建设工程有限责任公司 | Flow control valve, air-conditioning water system and hydraulic balance debugging method thereof |
-
2021
- 2021-01-29 CN CN202110125881.XA patent/CN112901838A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566004A (en) * | 2021-06-07 | 2021-10-29 | 中建三局第三建设工程有限责任公司 | Flow control valve, air-conditioning water system and hydraulic balance debugging method thereof |
| CN113566004B (en) * | 2021-06-07 | 2022-12-20 | 中建三局第三建设工程有限责任公司 | Flow control valve, air-conditioning water system and hydraulic balance debugging method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014079247A1 (en) | Power station boiler economizer | |
| CN103673201B (en) | A kind of adaptive air-conditioning end control system of temp.-differential and control method | |
| CN112901838A (en) | Self-operated regulating valve capable of automatically switching pressure difference values | |
| RU2628005C1 (en) | Method for managing operation of valve drive for balancing valve | |
| CN209027086U (en) | A kind of gas-heating water heater | |
| WO2023116066A1 (en) | Instant water heater and control method therefor | |
| CN106352559B (en) | A kind of the solar heat pump and water heating system and control method of automatic adjustment working medium charging amount | |
| CN215293767U (en) | Self-operated regulating valve capable of automatically switching pressure difference values | |
| CN205402905U (en) | Hot spring water intelligence constant temperature system | |
| CN208185546U (en) | A kind of dynamic differential pressure balanced type electric control valve | |
| US2067629A (en) | Automatic valve for heating systems | |
| CN205351823U (en) | Conversion of solar energy light and heat is with overheat protection device of heat absorber | |
| CN107327892B (en) | Solar energy photo-thermal heat collection heat supply pipeline | |
| CN208832642U (en) | A kind of embedded tubular building enclosure radiation cooling water temperature control system | |
| CN207922619U (en) | A kind of different poly- state heat utilization system of multi-source | |
| CN216953297U (en) | Energy-saving adjusting device for air conditioner | |
| CN104964491B (en) | A kind of one-way type capillary system heat exchange and division box | |
| CN201396966Y (en) | Self-operated temperature rising protection temperature controller of solar energy hot water system | |
| CN221076583U (en) | Water temperature adjusting device | |
| CN203824182U (en) | Refrigerating power regulating device for constant-frequency air-conditioner | |
| CN216383591U (en) | Carbon dioxide gas supply system | |
| CN219510894U (en) | Climate compensator system | |
| CN215446042U (en) | Steam temperature and pressure reducing device for heating system | |
| CN103361250A (en) | Wine-brewing distillation circulating system | |
| CN219889682U (en) | Energy-saving self-control adjusting device of combined energy air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |