CN201574933U - Starting unloading valve for Root's blower - Google Patents
Starting unloading valve for Root's blower Download PDFInfo
- Publication number
- CN201574933U CN201574933U CN2009202502223U CN200920250222U CN201574933U CN 201574933 U CN201574933 U CN 201574933U CN 2009202502223 U CN2009202502223 U CN 2009202502223U CN 200920250222 U CN200920250222 U CN 200920250222U CN 201574933 U CN201574933 U CN 201574933U
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- China
- Prior art keywords
- valve
- valve body
- chamber
- shaft
- gas
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- 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 - Lifetime
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Abstract
A starting unloading valve for a Root's blower is provided. A rubber diaphragm is disposed on a connection position of a valve cover and a valve body; a baffle is arranged in the middle of the valve body; the rubber diaphragm and the baffle divides the space enclosed by the valve cover and the valve body into three independent chambers including an upper chamber, a middle chamber and a lower chamber; the elastic rubber diaphragm is fixed on one end of a valve shaft which moves up and down; the other end of the valve shaft is installed with a sealed valve plate; a sealed valve seat matched with the sealed valve plate is disposed on an upper end surface of a gas inlet on the bottom of the valve body; a shaft sleeve is installed between the valve body baffle and the valve shaft; a spring is arranged on the shaft sleeve in the middle chamber; the lower chamber communicated with the atmosphere is in a gas communication with the upper chamber by a lower jet nozzle, a shaft hole and an upper jet nozzle; and a gas hole disposed on the middle chamber valve body is communicated with the atmosphere. The utility model enables the Root's blower to unload and start without equipping bypass on the gas outlet so as to increase the operation reliability of the device and reduce the investment cost; the starting unloading valve is not electrically controlled and is automatically controlled by air so as to be automatically opened and closed and has advantages of small volume and convenient installation.
Description
Technical field:
The utility model relates to a kind of novel Roots blower with starting feather valve, belongs to mechanical device.
Background technique:
In the practical application of Roots blower, when blower is connected to the pipeline of sealing or parallel running, motor exists under the back pressure (bringing onto load) the startup blower to rated speed at pipeline, need whole Motor torques, like this, directly start blower and can cause the inrush current of motor big, blower also bears very big pressure in moment, and blower and motor are all caused very big impact.Traditional way is: the emptying bypass is set on the blower export pipeline, electronic or pneumatic valve is installed in bypass, blower is opened by-pass valve earlier before starting, the gas that allows blower fan discharge passes through from bypass earlier, when starting to rated speed nearly, blower slowly closes by-pass valve again, the gas that allows blower fan discharge all enters process pipe again, thereby reaches the purpose that the blower underload starts.The shortcoming of this method is: 1. need set up electronic or pneumatic valve and supporting bypass line thereof, cost is higher; 2. opening and closing electronic or pneumatic valve must be equipped with electric or automatic control equipment; 3. owing to need electrical control, reliability reduces, in case electrical system breaks down, valve can't move, and influences the non-loaded startup of blower.
Summary of the invention:
The purpose of this utility model provide that a kind of structural volume is little, internal structure is exquisite and very practical Roots blower with starting feather valve.This valve need not any electric driving-controlling device, only can realize closing automatically and opening of valve by the pressure difference between internal cavity.
To achieve these goals, the technical solution of the utility model is: a kind of Roots blower is with starting feather valve, comprise valve body (1), valve gap (17) and adjust ring (2), valve body (1) bottom is the gas access port, fixedlys connected with valve gap (17) by bolt (8) in valve body (1) top; It is characterized in that: valve gap (17) is provided with diaphragm of rubber (9) with valve body (1) joint, valve body (1) middle part is provided with dividing plate (5), and the spatial separation that diaphragm of rubber (9), dividing plate (5) surround valve gap (17) and valve body (1) becomes epicoele (15), lumen (16), (19) three independent cavity of cavity of resorption; Flexible rubber dissepiment (9) is fixed on valve shaft (11) one ends moving up and down by locknut (12), and the other end of valve shaft (11) is equipped with sealing valve plate (3); Gas access port upper-end surface, valve body (1) bottom is provided with and seals the seal valve seat (23) that valve plate (3) connects, between valve body (1) dividing plate (5) and valve shaft (11) axle sleeve (6) is installed, axle sleeve (6) in the middle chamber (16) is provided with spring (7), the lower chambers that communicates with atmosphere (19) is passed through nozzle (20), axis hole (14) and top nozzle (13) gas connection upper chamber (15) down, and middle chamber (16) valve body is provided with pore (18) and is communicated with atmosphere.
The above-mentioned lower chambers that communicates with atmosphere (19) is by nozzle (20), axis hole (14) and top nozzle (13) gas are communicated with upper chamber (15) down.
Above-mentioned valve body (1) exhaust port (4) is provided with adjusts ring (2), adjusting ring (2) is fixed on the valve body (1) by a fastening screw trip bolt (22) and briquetting (21), by regulate adjusting ring, guarantee that the differential pressure Δ P of gas by exhaust port is set in about 1/3 working pressure
In order to make diaphragm of rubber that certain intensity be arranged, at the upper and lower clamping plate (10) that respectively are fixed with of above-mentioned diaphragm of rubber (9).
Above-mentioned sealing valve plate (3) is by being threaded on the valve shaft (11), and the valve plate center drilling communicates with axis hole, realizes that by upper and lower nozzle cavity of resorption is communicated with the gas of upper chamber.
Working procedure of the present utility model is: when blower does not start, do not have pressure on the service pipe, so the pressure of gas all equates in three chambers in upper, middle and lower, so feather valve is mentioned valve plate under the effect of spring, feather valve is opened.When blower starts, because outlet is provided with check valve or outlet pipe has load, gas discharges from exhaust port by the feather valve lower chambers, dam because of having, the pressure loss by exhaust port causes and has certain relative pressure in the cavity of resorption, cause chamber up and down links by axis hole, air is by last, following nozzle and axis hole enter in the epicoele, because the area that bears gas pressure intensity in the upper chamber greater than the area that bears pressure in the cavity of resorption, therefore will produce downward pressure, promote valve shaft and slowly move down, sealing valve plate then is pressed on the sealing surface of seat, close feather valve, the cut-out air enters the passage in the atmosphere, and air enters in the process pipe.After blower was shut down, because gas pressure is near barometric pressure in the pipeline, the pressure in the epicoele reduced, and valve shaft moves up under spring action again, opens valve plate, and feather valve returns to free opening state again, for blower startup is next time prepared.
The utility model makes the Roots blower exhaust outlet need not to be provided with bypass can reach the purpose that the blower fan unloading starts, and has increased the reliability of equipment operation, has reduced cost of investment.Start feather valve and need not electrical control, volume is little, and is simple in structure, easy for installation, operated automatically by air, realizes the automatic on-off of valve.
Description of drawings:
Fig. 1 is the utility model embodiment's a structural representation
Embodiment:
Below in conjunction with drawings and Examples the utility model is further described.
A kind of Roots blower of the present utility model mainly comprises valve body 1, valve gap 17 and adjusts ring 2 etc. with starting feather valve.Valve body 1 bottom is the gas access port, fixedlys connected with valve gap 17 by bolt 8 in valve body 1 top.Valve gap 17 is provided with diaphragm of rubber 9 with valve body 1 joint, and valve body 1 middle part is provided with dividing plate 5, and the spatial separation that diaphragm of rubber 9, dividing plate 5 surround valve gap 17 and valve body 1 becomes epicoele 15, lumen 16,19 3 independent cavity of cavity of resorption.Flexible rubber dissepiment 9 is fixed on valve shaft 11 1 ends moving up and down by locknut 12, and the other end of valve shaft 11 is equipped with sealing valve plate 3.Gas access port upper-end surface, valve body 1 bottom is provided with and seals the seal valve seat 23 that valve plate 3 connects, valve body 1 dividing plate 5 and 11 of valve shafts are equipped with axle sleeve 6, axle sleeve 6 in the middle chamber 16 is provided with spring 7, the lower chambers 19 that communicates with atmosphere is passed through nozzle 20, axis hole 14 and top nozzle 13 gas connection upper chamber 15 down, and middle chamber 16 valve bodies are provided with pore 18 and are communicated with atmosphere.
Valve body 1 exhaust port 4 is provided with adjusts ring 2, adjusts ring 2 and is fixed on the valve body 1 by a fastening screw trip bolt 22 and briquetting 21.In order to make diaphragm of rubber 9 that certain intensity be arranged, barrier film 9 respectively is fixed with clamping plate 10 up and down.
Claims (4)
1. a Roots blower comprises valve body (1), valve gap (17) and adjusts ring (2) with starting feather valve, and valve body (1) bottom is the gas access port, fixedlys connected with valve gap (17) by bolt (8) in valve body (1) top; It is characterized in that: valve gap (17) is provided with diaphragm of rubber (9) with valve body (1) joint, valve body (1) middle part is provided with dividing plate (5), and the spatial separation that diaphragm of rubber (9), dividing plate (5) surround valve gap (17) and valve body (1) becomes epicoele (15), lumen (16), (19) three independent cavity of cavity of resorption; Flexible rubber dissepiment (9) is fixed on valve shaft (11) one ends moving up and down by locknut (12), and the other end of valve shaft (11) is equipped with sealing valve plate (3); Gas access port upper-end surface, valve body (1) bottom is provided with and seals the seal valve seat (23) that valve plate (3) connects, between valve body (1) dividing plate (5) and valve shaft (11) axle sleeve (6) is installed, axle sleeve (6) in the middle chamber (16) is provided with spring (7), the lower chambers that communicates with atmosphere (19) is passed through nozzle (20), axis hole (14) and top nozzle (13) gas connection upper chamber (15) down, and middle chamber (16) valve body is provided with pore (18) and is communicated with atmosphere.
2. Roots blower according to claim 1 is characterized in that with starting feather valve: the above-mentioned lower chambers that communicates with atmosphere (19) is by nozzle (20), axis hole (14) and top nozzle (13) gas are communicated with upper chamber (15) down.
3. Roots blower according to claim 1 is characterized in that with starting feather valve: above-mentioned valve body (1) exhaust port (4) is provided with adjusts ring (2), adjusts ring (2) and is fixed on the valve body (1) by a fastening screw trip bolt (22) and briquetting (21).
4. Roots blower according to claim 1 is characterized in that: the upper and lower clamping plate (10) that respectively are fixed with of above-mentioned diaphragm of rubber (9) with starting feather valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202502223U CN201574933U (en) | 2009-11-12 | 2009-11-12 | Starting unloading valve for Root's blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202502223U CN201574933U (en) | 2009-11-12 | 2009-11-12 | Starting unloading valve for Root's blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201574933U true CN201574933U (en) | 2010-09-08 |
Family
ID=42694806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202502223U Expired - Lifetime CN201574933U (en) | 2009-11-12 | 2009-11-12 | Starting unloading valve for Root's blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201574933U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352859A (en) * | 2011-11-15 | 2012-02-15 | 宜兴市迪凡特机械制造有限公司 | Multifunctional mini-resistance integrated protection device used for fan outlet side |
| CN111188753A (en) * | 2018-11-14 | 2020-05-22 | 昆西压缩机有限责任公司 | No-load starting valve of compressor |
-
2009
- 2009-11-12 CN CN2009202502223U patent/CN201574933U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352859A (en) * | 2011-11-15 | 2012-02-15 | 宜兴市迪凡特机械制造有限公司 | Multifunctional mini-resistance integrated protection device used for fan outlet side |
| CN102352859B (en) * | 2011-11-15 | 2013-01-23 | 宜兴市迪凡特机械制造有限公司 | Multifunctional mini-resistance integrated protection device used for fan outlet side |
| CN111188753A (en) * | 2018-11-14 | 2020-05-22 | 昆西压缩机有限责任公司 | No-load starting valve of compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100908 |
|
| CX01 | Expiry of patent term |