CN203812803U - Flow switch - Google Patents
Flow switch Download PDFInfo
- Publication number
- CN203812803U CN203812803U CN201420177144.XU CN201420177144U CN203812803U CN 203812803 U CN203812803 U CN 203812803U CN 201420177144 U CN201420177144 U CN 201420177144U CN 203812803 U CN203812803 U CN 203812803U
- Authority
- CN
- China
- Prior art keywords
- pressure
- pressure chamber
- push rod
- flow switch
- pressing plate
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a flow switch. The flow switch comprises a shell; one side of the shell is provided with a differential pressure pipe; a fluid channel is arranged in the differential pressure pipe; a throttling ring is arranged in the differential pressure pipe; the center of the throttling ring is provided with a narrow channel; a pressure cavity is arranged beside the differential pressure pipe; a rubber diaphragm is arranged in the pressure cavity; the rubber diaphragm divides the pressure cavity into a left pressure cavity and a right pressure cavity; a total-pressure channel is arranged between the right pressure cavity and the fluid channel; a dynamic pressure channel is arranged between the left pressure cavity and the narrow channel; one side of the rubber diaphragm is provided with a force bearing disc; the force bearing disc is connected with a push rod; one end of the push rod is provided with a pressure regulating assembly; the shell is also provided with a micro switch and a micro switch press plate which is driven to move by the push rod; and one end of the micro switch press plate abuts against the micro switch. The flow switch of the utility model can directly monitor the flowing condition of heating water and has few movement components, has no high requirement for water quality. With the flow switch adopted, the service life of the flow switch can be effectively guaranteed. The flow switch has the advantages of simple structure, few movement components and long service life.
Description
[technical field]
The utility model relates to a kind of flow switch.
[background technology]
What in existing Household gas-burning heating stove, have is provided with water flow switch, and in Household gas-burning heating stove (also claiming wall-hung boiler), the flow regime of heating water, is the key factor of the safe operation of wall-hung boiler; Heating water, in proper flow state, is the prerequisite of wall-hung boiler safe operation.Affecting the mobile principal element of wall-hung boiler heating water has: system water yield full state (whether reaching requirement pressure), pipeline pipe valve situation (open and close or open quantity not sufficient), pump head loss or stall, heat exchanger passages (smooth or stop up), cooling system (smooth or stop up), system have or not to be freezed or aeroembolism etc.
The key effect of water flow switch is can the signal of heating system current situation is preposition to control system, can effectively protect the security of operation of wall-hung boiler and heating system.For monitoring the original paper of streamflow regime, mainly contain current Hall flow sensor, piston type current switch, baffle plate type water flow switch, turnover plate type water flow switch or monitor streamflow regime by detecting the temperature rise condition feedback of heating water now; More than install in system applies and cut both ways.Hall flow sensor signal is reliable, but because rotor high-speed rotates, therefore water quality is larger on the life-span impact of rotor; Piston type, baffle-type, turnover plate type Water flow switch structure are simple, moving component is few, long compared with the hall principle water flow switch life-span, but because adopting magnetic material, cause being immersed in the foreign matters such as parts surface in heating water absorption iron impurity, flow parameter drift easily occurs or by catching phenomenon.Utilize temperature rise feedback to detect current situation, because system is in combustion heating state, signal feedback lags behind, and has the hidden danger of scaling loss machine.
[utility model content]
The purpose of this utility model is to overcome the deficiencies in the prior art part, provides a kind of simple in structure, and moving component is few, and switch life is long, controls flow switch accurately.
The purpose of this utility model is achieved in that
A kind of flow switch, it is characterized in that it comprises housing, described housing one side is provided with pressure reduction pipe, in described pressure reduction pipe, be provided with fluid passage, the dirty restrictor ring that is provided with in described pressure reduction pipe, the central authorities of described restrictor ring are provided with the slype that is less than fluid passage, the side of described pressure reduction pipe is provided with pressure chamber, in described pressure chamber, be provided with rubber diaphragm, described rubber diaphragm cuts off into pressure chamber on not connected left pressure chamber and right pressure chamber, between described right pressure chamber and fluid passage, be provided with total head passage, between described left pressure chamber and slype, be provided with dynamic pressure passage, one side of described rubber diaphragm is provided with force bearing disk, on described force bearing disk, be connected with a push rod, the other end of described push rod is provided with pressure regulation assembly, on described housing, be also provided with sensitive switch, on described housing, be also provided with and can drive mobile sensitive switch pressing plate by push rod, the other end and the sensitive switch of described sensitive switch pressing plate offset.
A kind of flow switch as above, it is characterized in that described pressure regulation assembly comprises the pressure regulating cavity that is located at pressure chamber side, described pressure regulating cavity outside is provided with pressure adjusting nut, in described pressure regulating cavity, be provided with pressing plate shift fork, one end and the pressing plate shift fork of described sensitive switch pressing plate offset, pressure regulating cavity is stretched out through pressure adjusting nut through pressing plate shift fork more again through pressure chamber in the outer end of described push rod, and on the push rod in described pressure regulating cavity, cover has compression spring.
A kind of flow switch as above, is characterized in that the width D of described fluid passage is 12-25 millimeter; The width D of the central slype of described restrictor ring is 6-10 millimeter.
The utility model can directly be monitored heating water flow condition, and moving component is few, not high to water quality requirement, can effectively guarantee the useful life of switch, and simple in structure, moving component is few, and switch life is long.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model.
[embodiment]
A kind of flow switch, it comprises housing 1, described housing 1 one sides are provided with pressure reduction pipe 2, in described pressure reduction pipe 2, be provided with fluid passage 21, the dirty restrictor ring 3 that is provided with in described pressure reduction pipe 2, the central authorities of described restrictor ring 3 are provided with the slype 31 that is less than fluid passage, the side of described pressure reduction pipe 2 is provided with pressure chamber 4, in described pressure chamber 4, be provided with rubber diaphragm 5, described rubber diaphragm 5 cuts off into pressure chamber 4 on not connected left pressure chamber 41 and right pressure chamber 42, between described right pressure chamber 42 and fluid passage 21, be provided with total head passage 6, between described left pressure chamber 41 and slype 31, be provided with dynamic pressure passage 7, one side of described rubber diaphragm 5 is provided with force bearing disk 51, on described force bearing disk 51, be connected with a push rod 52, the other end of described push rod 52 is provided with pressure regulation assembly 8, on described housing 1, be also provided with sensitive switch 9, on described housing 1, be also provided with and can drive mobile sensitive switch pressing plate 53 by push rod 52, the other end and the sensitive switch 9 of described sensitive switch pressing plate 53 offset.
Wherein pressure regulation assembly 8 comprises the pressure regulating cavity 81 that is located at pressure chamber 4 sides, described pressure regulating cavity 81 outsides are provided with pressure adjusting nut 82, in described pressure regulating cavity 81, be provided with pressing plate shift fork 83, one end and the pressing plate shift fork 83 of described sensitive switch pressing plate 53 offset, pressure regulating cavity 81 is stretched out through pressure adjusting nut 82 through pressing plate shift fork 83 more again through pressure chamber 4 in the outer end of described push rod 52, and on the push rod 52 in described pressure regulating cavity 81, cover has compression spring 84.
The width D 1 of fluid passage 21 is 12-25 millimeter; The width D 2 of the central slype 31 of described restrictor ring is 6-10 millimeter; Compression spring is when 10 millimeters of decrements, and force value is 0.5 to 1 kilogram.
This structure water flow switch adopts venturi principle, utilizes the pressure differential diaphragm of restrictor ring front and back to move, and by the amount of movement of diaphragm, realizes the object of monitoring current situation; This monitoring method is that to take continuity equation (mass conservation law) and the Bernoulli equation (law of conservation of energy) of fluid be theoretical foundation.Real process principle is (can with reference to schematic diagram): when the restrictor ring (D2 place) of current in pipeline, because restrictor ring place forms local contraction, water flow velocity is increased, according to the flow mechanism of fluid, current static pressure reduces herein, so (D1, D2 place) just produced pressure reduction (right pressure chamber 42 pressure P before and after restrictor ring
1-left pressure chamber 41 pressure P
2).Fluid flow is larger, and the pressure reduction of generation is larger, can weigh according to pressure reduction the size of flow like this.Venturi tube structure flow monitoring advantage is directly to monitor heating water flow condition, and moving component is few, not high to water quality requirement, can effectively guarantee the useful life of switch; Shortcoming is that the required precision of each several part dimensioned is higher, and loss in head is about and records 10% of pressure head, but limited to systematic influence.
To be water enter pressure reduction joint as the direction of arrow to its course of work, when the D2 of restrictor ring place, because sectional area diminishes, flow rate of water flow increases, thereby makes the pressure of current herein by left pressure chamber 41 pressure P
1be reduced to right pressure chamber 42 pressure P
2; Larger, right pressure chamber 42 pressure P of flow velocity
2less, the two pressure reduction is larger; Less, right pressure chamber 42 pressure P of flow velocity
2approach left pressure chamber 41 pressure P
1, the two pressure reduction is less.
This structure critical piece forms sees schematic diagram; Rubber diaphragm (9) is divided into not connected left and right two pressure cavity by the cavity of left shell (4) and right shell body (5) formation; Right chamber communicates with pressure reduction joint (7) large interface (D) by total head passage (6), and left pressure chamber 41 chamber internal water pressures are P
1; Left chamber communicates with pressure reduction joint (7) trunnion interface (d) by dynamic pressure passage (8), and right pressure chamber 42 chamber internal water pressures are P
2; Work as P
1be greater than P
2during certain value, rubber diaphragm (9) is (as shown in the figure) bulging left, thereby promote force bearing disk (10), is moved to the left; Force bearing disk (9) is moved to the left and compression pressure spring (1) by push rod (13) band dynamic pressure plate shift fork (11); Pressing plate shift fork makes sensitive switch pressing plate (3) counterclockwise rotate around fixed axis, thereby is upspring in sensitive switch (2) contact; When a variety of causes causes flow to reduce, once pressure reduction (P
1-P
2) pressure that forms is while being less than the pressure of compression spring, compression spring reply to be upheld, and drives pressing plate shift fork to move to right, and causes the clockwise direction revolution under the effect of self spring of sensitive switch pressing plate, once stroke is enough, sensitive switch pressing plate can be depressed sensitive switch contact; During this period, by the swell increment of push rod and force bearing disk compressing rubber epithelium; The flow regime that this process is about to water is converted into the signal of telecommunication, the above whole process that completes flow monitoring.
When open completely sensitive switch contact, corresponding minimum discharge is to determine by the pretension degree of compression spring; By rotational pressure adjusting nut, be the decrement of adjustable compression spring, thereby realize determining of minimum discharge; By regulating pressure adjusting nut to determine the decrement of spring, mismachining tolerance that also can each parts of balance.
Claims (3)
1. a flow switch, it is characterized in that it comprises housing (1), described housing (1) one side is provided with pressure reduction pipe (2), in described pressure reduction pipe (2), be provided with fluid passage (21), the dirty restrictor ring (3) that is provided with in described pressure reduction pipe (2), the central authorities of described restrictor ring (3) are provided with the slype (31) that is less than fluid passage, the side of described pressure reduction pipe (2) is provided with pressure chamber (4), in described pressure chamber (4), be provided with rubber diaphragm (5), described rubber diaphragm (5) cuts off into pressure chamber (4) on not connected left pressure chamber (41) and right pressure chamber (42), between described right pressure chamber (42) and fluid passage (21), be provided with total head passage (6), between described left pressure chamber (41) and slype (31), be provided with dynamic pressure passage (7), one side of described rubber diaphragm (5) is provided with force bearing disk (51), on described force bearing disk (51), be connected with a push rod (52), the other end of described push rod (52) is provided with pressure regulation assembly (8), on described housing (1), be also provided with sensitive switch (9), on described housing (1), be also provided with and can drive mobile sensitive switch pressing plate (53) by push rod (52), the other end and the sensitive switch (9) of described sensitive switch pressing plate (53) offset.
2. a kind of flow switch according to claim 1, it is characterized in that described pressure regulation assembly (8) comprises the pressure regulating cavity (81) that is located at pressure chamber (4) side, described pressure regulating cavity (81) outside is provided with pressure adjusting nut (82), in described pressure regulating cavity (81), be provided with pressing plate shift fork (83), one end and the pressing plate shift fork (83) of described sensitive switch pressing plate (53) offset, pressure regulating cavity (81) is stretched out through pressure adjusting nut (82) through pressing plate shift fork (83) more again through pressure chamber (4) in the outer end of described push rod (52), the upper cover of push rod (52) in described pressure regulating cavity (81) has compression spring (84).
3. a kind of flow switch according to claim 1, is characterized in that the width (D1) of described fluid passage (21) is 12-25 millimeter; The width (D2) of the central slype (31) of described restrictor ring (3) is 6-10 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177144.XU CN203812803U (en) | 2014-04-11 | 2014-04-11 | Flow switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420177144.XU CN203812803U (en) | 2014-04-11 | 2014-04-11 | Flow switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203812803U true CN203812803U (en) | 2014-09-03 |
Family
ID=51451522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420177144.XU Expired - Fee Related CN203812803U (en) | 2014-04-11 | 2014-04-11 | Flow switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203812803U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128856A (en) * | 2016-06-30 | 2016-11-16 | 宁波惠荣电器有限公司 | A kind of structure utilizing differential water pressures to control switch on and off electricity |
| CN106504941A (en) * | 2016-12-27 | 2017-03-15 | 中山市博安泰电器科技有限公司 | A kind of novel differential pressure switch |
| CN108224973A (en) * | 2017-12-29 | 2018-06-29 | 宁波雯泽纺织品有限公司 | A kind of cloth drying device |
| EP3557601A1 (en) * | 2018-04-20 | 2019-10-23 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Switch device and rubber contact |
-
2014
- 2014-04-11 CN CN201420177144.XU patent/CN203812803U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128856A (en) * | 2016-06-30 | 2016-11-16 | 宁波惠荣电器有限公司 | A kind of structure utilizing differential water pressures to control switch on and off electricity |
| CN106128856B (en) * | 2016-06-30 | 2018-01-19 | 宁波惠荣电器有限公司 | A kind of structure using differential water pressures controlling switch power on/off |
| CN106504941A (en) * | 2016-12-27 | 2017-03-15 | 中山市博安泰电器科技有限公司 | A kind of novel differential pressure switch |
| CN108224973A (en) * | 2017-12-29 | 2018-06-29 | 宁波雯泽纺织品有限公司 | A kind of cloth drying device |
| EP3557601A1 (en) * | 2018-04-20 | 2019-10-23 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Switch device and rubber contact |
| CN110391102A (en) * | 2018-04-20 | 2019-10-29 | 株式会社东海理化电机制作所 | Switching device and elastomer connector |
| CN110391102B (en) * | 2018-04-20 | 2021-04-20 | 株式会社东海理化电机制作所 | Switch device and rubber joint |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20200411 |