CN204226194U - A kind of sliding valve vacuum pump of easy startup - Google Patents
A kind of sliding valve vacuum pump of easy startup Download PDFInfo
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- CN204226194U CN204226194U CN201420667892.6U CN201420667892U CN204226194U CN 204226194 U CN204226194 U CN 204226194U CN 201420667892 U CN201420667892 U CN 201420667892U CN 204226194 U CN204226194 U CN 204226194U
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- sliding valve
- pump
- ventilating hole
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Abstract
The utility model discloses a kind of sliding valve vacuum pump of easy startup, aim to provide a kind of startup than being easier to, and the sliding valve vacuum pump that degree of vacuum reduces can be avoided, its drip irrigation device is a kind of sliding valve vacuum pump of easy startup, comprise the pump housing, the described pump housing is provided with suction port and relief opening, the side of the corresponding suction port of the described pump housing is provided with ventilating hole, described ventilating hole is connected with described air-breathing working room, described ventilating hole has been threaded valve, the other end of the relative ventilating hole of described valve has been threaded breathing pipe, electric heating element and the first filter screen are installed in described breathing pipe successively.The sliding valve vacuum pump of a kind of easy startup of the present utility model can start at ambient pressure than being easier to, and avoids the problem that degree of vacuum reduces simultaneously, improves the working efficiency of vacuum pump, extends the working life of vacuum pump.
Description
Technical field
The utility model relates to a kind of vacuum pump, and in particular, it relates to a kind of sliding valve vacuum pump of easy startup.
Background technique
Vacuum pump be a kind of can constantly by gas suck and discharge with the equipment reaching object of bleeding, be widely used in the industries such as metallurgy, oil, chemical industry, medicine, food, electronic apparatus, spatial simulation and high-end physics.Vacuum pump is of a great variety, comprise molecular pump, diffusion pump, Roots pump, dry pump, reciprocating pump, sliding vane rotary vacuum pump, water ring vaccum pump, sliding valve vacuum pump etc., wherein slide-valve vacuum pump is the same with rotary-vane vaccum pump, be a kind of vacuum displacement pump, be useful in the industrial processs such as vacuum smelting, vacuum drying, vacuum distillation, vacuum evaporation, Vacuum Concentration, vacuum crystallization, vacuum welding, vacuum coating, vacuum simulation.
Sliding valve vacuum pump has a cavity, and cavity, built with guiding valve and eccentric wheel, cavity is equipped with outlet valve, is changed the size of chamber intracorporeal space by the rotation of eccentric wheel in cavity, thus reaches the object of being discharged from guiding valve suction and from outlet valve by gas.
As depicted in figs. 1 and 2, sliding valve vacuum pump comprises the pump housing 1, and the described pump housing 1 is provided with suction port 13 and relief opening 14, the pump housing 1 is built with guiding valve 4, at guiding valve 4 built with eccentric wheel 3, eccentric wheel 3 by rotatingshaft 2 driven rotary, the axle center of rotatingshaft 2 and pump chamber center superposition.The cylindrical of guiding valve 4 slides at the internal surface of pump chamber, and guiding valve 4 top freely slides up and down and swings in semicircular guiding valve guide rail 5.Therefore pump chamber is divided into air-breathing working room 17 and working room 18 of calming the anger by guiding valve 4.When eccentric wheel counterclockwise rotates, working room 18 volume of calming the anger reduces gradually, and the gas of suction is compressed gradually, and pressure increases gradually.Meanwhile, air-breathing working room 17 volume then expands gradually, and gas pressure wherein constantly reduces, and pumped gas is just from the lumen pore of guiding valve guide rail 5 continuously from inlet hole inhale working room 17.When the gas pressure of working room 18 of calming the anger rises to higher than barometric pressure, just push outlet valve 6 open and enter air; Air-breathing working room 17 volume then reaches maximum value, and at this moment air-breathing ends, thus completes a work cycle.Eccentric wheel continuously rotates, and gas is just constantly inhaled into, compress and discharge thus reach the object of continuous air extraction.
But showing in the art, there are some problems in sliding valve vacuum pump: when sliding valve vacuum pump does not use, oil film remaining in cavity can be cemented in cavity inner surface and eccentric surface, like this when starting this sliding valve vacuum pump next time, eccentric wheel can be made to be difficult to rotate, and oil can not play the effect of lubrication, way general at present is first dallied a few minutes by this sliding valve vacuum pump, eccentric wheel is made to rotate preheating chamber, temperature in chamber is improved and makes this sliding valve vacuum pump work again, but this way is cumbersome, be unfavorable for the working efficiency improving vacuum pump, also have and be exactly when this sliding valve vacuum pump quits work, air inlet working room 17 sometimes can be in a vacuum negative pressure condition, working room 18 of calming the anger then is in normal atmosphere pressure condition, the atmospheric pressure of working room 18 of calming the anger like this produces a pressure to air-breathing working room 17, this sliding valve vacuum pump can be made when starting, the starting power needing motor larger just can make this eccentric wheel overcome normal rotation after atmospheric pressure, the starting load of motor can be caused so larger, the working life of easy reduction motor, way of the prior art is provided with open type ventilating hole 7 on the pump housing 1 of side, air-breathing working room 17, air-breathing working room 17 in this vent 7 and pump chamber communicates, at this moment in order to make vacuum pump can enter air when starting, the barometric pressure of air-breathing working room 17 is balanced each other with the barometric pressure of working room 18 of calming the anger, electric motor starting ratio can be made like this to be easier to, can also stop steadily under the state that degree of vacuum is lower, although this way can make sliding valve vacuum pump start than being easier at ambient pressure, stop steadily under the state that degree of vacuum is lower, but the problem of the reduction of degree of vacuum can be caused, and impurity easily enters in chamber in air, can cause the oil in chamber gradually by air containing a small amount of soluble gas dirt, make the vacuum property-deterioration of oil, pumping speed and the limiting vacuum of pump can be reduced, therefore proposition scheme is needed to solve these problems.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is that providing one to start at ambient pressure is relatively easy to sliding valve vacuum pump, avoid the problem that degree of vacuum reduces simultaneously, improve the working efficiency of sliding valve vacuum pump, extend the working life of sliding valve vacuum pump.
For achieving the above object, the utility model provides following technological scheme: a kind of sliding valve vacuum pump of easy startup, comprise the pump housing, the described pump housing is provided with suction port and relief opening, described relief opening is provided with outlet valve, the described pump housing is built with guiding valve, described guiding valve is provided with eccentric wheel, eccentric wheel is by rotatingshaft driven rotary, the axle center of rotatingshaft and pump chamber center superposition, pump chamber is divided into air-breathing working room and working room of calming the anger by guiding valve, the side of the corresponding suction port of the described pump housing is provided with ventilating hole, described ventilating hole is connected with described air-breathing working room, described ventilating hole has been threaded valve, the other end of the relative ventilating hole of described valve has been threaded breathing pipe, electric heating element and the first filter screen are installed in described breathing pipe successively.
As preferably, described suction port place is provided with the second filter screen.
As preferably, described electric heating element is electric heating wire.
As preferably, between described valve and ventilating hole, be installed on sealing gasket.
The utility model has following advantage compared to existing technology: at ventilating hole mounted valve, when sliding valve vacuum pump starts, valve is in open mode, closed condition is in after startup, air-breathing working room is identical with the atmospheric pressure of working room of calming the anger at ambient pressure can to make sliding valve vacuum pump like this, such electric motor starting ratio is easier to, and can avoid the reduction of degree of vacuum simultaneously; Valve is connected with breathing pipe, breathing pipe also installs electric heating element, electric heating element is electric heating wire, when sliding valve vacuum pump starts, electrothermal wire heating will heat the air flowed through like this, the air in arrival air-breathing working room can be made like this to be hot air, so just can preheating chamber, sliding valve vacuum pump is more easily started; Breathing pipe being connected with the first filter screen, suction port being connected with the second filter screen, is in order to the impurity in filtered air, makes the air entering chamber free from foreign meter as much as possible, thus improves the efficiency of sliding valve vacuum pump; Between valve and ventilating hole, be installed on sealing gasket, be to improve sealing, prevents the degree of vacuum of air-breathing working room from reducing; So just can realizing this sliding valve vacuum pump can start at ambient pressure than being easier to, turn avoid the problem that degree of vacuum reduces simultaneously, improve the working efficiency of sliding valve vacuum pump, extend the working life of sliding valve vacuum pump.
Accompanying drawing explanation
Fig. 1 is the structural representation one of sliding valve vacuum pump of the prior art;
Fig. 2 is the structural representation two of existing sliding valve vacuum pump in the art;
Fig. 3 is the structural representation one of the sliding valve vacuum pump of a kind of easy startup of the utility model;
Fig. 4 is the A portion enlarged diagram of Fig. 3;
Fig. 5 is the structural representation two of the sliding valve vacuum pump of a kind of easy startup of the utility model;
Fig. 6 is the circuit diagram of electric heating element.
In figure: 1, the pump housing; 2, rotatingshaft; 3, eccentric wheel; 4, guiding valve; 5, guiding valve guide rail; 6, outlet valve; 7, ventilating hole; 8, the first filter screen; 9, electric heating element; 10, valve; 11, the second filter screen; 12, breathing pipe; 13, suction port; 14, relief opening; 15, plug; 16, switch; 17, air-breathing working room; 18, to calm the anger working room; 19, sealing gasket; 20, through hole; 21, entrance point; 22, outlet end.
Embodiment
Referring to figs. 1 through Fig. 6, the sliding valve vacuum pump embodiment of a kind of easy startup of the utility model is described further.
The ventilating hole 7 of the described pump housing 1 is provided with internal thread, described valve 10 comprises entrance point 21 and outlet end 22, entrance point 21 and outlet end 22 are provided with outside thread (it should be noted that herein, valve is existing known technology, be not described further herein) uniform winding one deck sealing gasket 19 on the outside thread of the outlet end 21 of valve 10, sealing pad 19 is preferably raw meal belt, raw meal belt covers on the outside thread of outlet end 21, then the outlet end 21 being coated with raw meal belt is slowly screwed in ventilating hole 7, raw meal belt is formed to establishing to being located between the outside thread of outlet end 21 and the internal thread of ventilating hole 7, play the effect of sealing, internal thread is provided with in one end of breathing pipe 12, then by the entrance point 21 of valve 10 and breathing pipe 12 screw-thread fit, and then electric heating element 9 is installed in breathing pipe 12, this electric heating element 9 is preferably electric heating wire, as shown in Figure 4, this electric heating wire is placed in breathing pipe 12, breathing pipe 12 is provided with through hole 20, be connected in circuit after the electric wire at the two ends of electric heating wire is stretched out through hole 20, plug 15 and switch 16 is provided with in this circuit, again by bonding for the first filter screen 8 or be connected to the end of breathing pipe 12, then or clamping second filter screen 11 bonding at suction port 13 place, this completes the installation of this sliding valve vacuum pump.
The pump housing 1 of suction port 13 side is provided with ventilating hole 7, this ventilating hole 7 and described air-breathing working room 17 communicate, one end of valve 10 is fixedly connected with at described ventilating hole 7 place, this valve 10 is in open mode when sliding valve vacuum pump starts, outside atmosphere enters air-breathing working room 17 by this valve 10, the gas pressure of air-breathing working room 17 and working room 18 of calming the anger being balanced each other, the rotatingshaft 2 of sliding valve vacuum pump can being made like this to be with movable eccentric wheel 3 to rotate than being easier at ambient pressure, after sliding valve vacuum pump starts, this valve 10 is in closed condition, can avoid the reduction of the degree of vacuum in air-breathing working room 17 like this, thus ensures the degree of vacuum needed for sliding valve vacuum pump, the breathing pipe 12 having installed electric heating element 9 and the first filter screen 8 is also connected with at the other end of valve 10, when valve 10 is opened, plug 15 is inserted socket, closing switch 16, the circuit ON that electric heating wire connects, electrothermal wire heating, the air entering into air-breathing working room 17 like this through electric heating wire all can be carried out preheating by electric heating wire, the air of such arrival air-breathing working room 17 is exactly hot air, the temperature in air-breathing working room 17 is so just made to raise, the oil film being cemented in pump housing internal surface will melt, this sliding valve vacuum pump is so just made more easily to start, and eccentric wheel is better operated, breathing pipe 12 is fixedly connected with the first filter screen 8, the second filter screen 11 is fixedly connected with at ventilating hole 13 place, first filter screen 8 and the second filter screen 11 can filter out the partial impurities in air, make the air that enters in air-breathing working room 17 cleaner, thus the degree of vacuum improved in the pump housing 1, improve the running efficiency of sliding valve vacuum pump, and the working life of sliding valve vacuum pump can be promoted.
When described sliding valve vacuum pump is tending towards stopping (when sliding valve vacuum pump stops in power-off, guiding valve is tending towards motion to be stopped, but the state because inertia stops not yet completely), described valve 10 is in open mode, outside atmosphere enters air-breathing working room 17 by this valve 10, make the gas pressure relative equilibrium of air-breathing working room 17 and working room 18 of calming the anger, be convenient to sliding valve vacuum pump like this and stop steadily.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. the sliding valve vacuum pump easily started, comprise the pump housing, the described pump housing is provided with suction port and relief opening, described relief opening is provided with outlet valve, the described pump housing is built with guiding valve, described guiding valve is provided with eccentric wheel, eccentric wheel is by rotatingshaft driven rotary, the axle center of rotatingshaft and pump chamber center superposition, pump chamber is divided into air-breathing working room and working room of calming the anger by guiding valve, the side of the corresponding suction port of the described pump housing is provided with ventilating hole, described ventilating hole is connected with described air-breathing working room, it is characterized in that: described ventilating hole has been threaded valve, the other end of the relative ventilating hole of described valve has been threaded breathing pipe, electric heating element and the first filter screen are installed in described breathing pipe successively.
2. the sliding valve vacuum pump of a kind of easy startup according to claim 1, is characterized in that: described suction port place is provided with the second filter screen.
3. the sliding valve vacuum pump of a kind of easy startup according to claim 1, is characterized in that: described electric heating element is electric heating wire.
4. the sliding valve vacuum pump of a kind of easy startup according to claim 1, is characterized in that: be installed on sealing gasket between described valve and ventilating hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667892.6U CN204226194U (en) | 2014-11-10 | 2014-11-10 | A kind of sliding valve vacuum pump of easy startup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667892.6U CN204226194U (en) | 2014-11-10 | 2014-11-10 | A kind of sliding valve vacuum pump of easy startup |
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| Publication Number | Publication Date |
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| CN204226194U true CN204226194U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420667892.6U Active CN204226194U (en) | 2014-11-10 | 2014-11-10 | A kind of sliding valve vacuum pump of easy startup |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912788A (en) * | 2015-05-20 | 2015-09-16 | 镇江市永泰汽车配件制造有限公司 | Slide valve vacuum pump valve transformation method |
| CN105090029A (en) * | 2015-09-15 | 2015-11-25 | 苏州普京真空技术有限公司 | Vacuum pump |
| CN108479160A (en) * | 2018-05-29 | 2018-09-04 | 贵州杉海沿环保科技有限责任公司 | Percolate from garbage filling field processing unit |
-
2014
- 2014-11-10 CN CN201420667892.6U patent/CN204226194U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912788A (en) * | 2015-05-20 | 2015-09-16 | 镇江市永泰汽车配件制造有限公司 | Slide valve vacuum pump valve transformation method |
| CN105090029A (en) * | 2015-09-15 | 2015-11-25 | 苏州普京真空技术有限公司 | Vacuum pump |
| CN108479160A (en) * | 2018-05-29 | 2018-09-04 | 贵州杉海沿环保科技有限责任公司 | Percolate from garbage filling field processing unit |
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