CN204226202U - The throttle valve of double stage sliding valve vacuum pump - Google Patents
The throttle valve of double stage sliding valve vacuum pump Download PDFInfo
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- CN204226202U CN204226202U CN201420667126.XU CN201420667126U CN204226202U CN 204226202 U CN204226202 U CN 204226202U CN 201420667126 U CN201420667126 U CN 201420667126U CN 204226202 U CN204226202 U CN 204226202U
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- sealing gasket
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Abstract
The utility model discloses a kind of throttle valve of double stage sliding valve vacuum pump, its drip irrigation device comprises throttle valve valve body, throttle valve valve body substitutes manually operated valve originally, throttle valve valve body comprises throttle valve gland and throttle valve, throttle valve gland and throttle valve seat are threaded connection, gland through hole is provided with in described throttle valve gland, valve seat through-hole is provided with in throttle valve seat, gland through hole is communicated with valve seat through-hole, gland through hole and valve seat through-hole connectivity part are connected with sealing gasket, sealing gasket is provided with closed hole, throttle valve gland is connected with locking nut relative to being connected one end with throttle valve seat, locking nut internal thread is connected with adjusting screw, through hole is provided with in adjusting screw, described through hole is communicated with gland through hole, the steel ball for controlling oily flow is provided with between adjusting screw and sealing gasket, spring is connected with in valve seat through-hole, spring one end abuts with steel ball through closed hole.The utility model without the need to manual operation, thus decreases manual operation and to slip up the fault of the pump caused.
Description
Technical field
The utility model relates to a kind of vacuum pump, and more particularly, it relates to a kind of throttle valve of double stage sliding valve vacuum pump.
Background technique
The more employing triplex structure of double stage sliding valve vacuum pump of current domestic production, one of them little cylinder and a vat form senior chamber, and another little cylinder forms rudimentary chamber connects, this structural type mainly considers the dynamic balancing of centrifugal inertia force of guiding valve, eccentric generation.Certainly, domestic also have minority two cylinder double stage sliding valve vacuum pump, comprise body, run through in body and have transmission shaft, transmission shaft one end has been rotatably connected stabilizer, the other end has been rotatably connected belt pulley, it replaces the function of stabilizer with belt pulley, belt pulley drives transmission shaft, key, transmission is to eccentric wheel, eccentric wheel band movable pulley, guiding valve does the swing of crank block form under the constraint of guiding valve guide rail, go round and begin again, its gas flowing portion is suction port suction gas, enter the cavity of spool valve end, guiding valve and pump chamber form A, B two chambeies, pump intake gas imports A chamber one side opening through slide valve lever and enters A chamber, now be in breathing process, along with the rotation of guiding valve, A chamber volume progressively expands, and realizes air-breathing, motion B chamber along with guiding valve progressively reduces and is exhausted, the effect of its twin-stage slide valve pump is that the A chamber of high cylinder completes air-breathing, and A chamber volume progressively expands, and when arriving maximum value, B chamber disappears, produce again new A chamber, A chamber is originally partitioned into new B chamber, and the gas in B chamber flows into rudimentary chamber by air flue, rudimentary chamber also by A, B two chamber form, A chamber progressively expands carries out air-breathing, and B chamber is progressively compressed and is exhausted by the effect of oil.When B chamber narrows down to a certain degree, rely on the effect of oil to open low cylinder outlet valve, gas is discharged.The two cylinder of two cylinder double stage sliding valve vacuum pump is low cylinder and high cylinder, and height cylinder is communicated with an oil sump respectively, and when pump is shut down, high and low cylinder oil sump is separated by a manually operated valve, and pump oil base originally concentrates on low cylinder oil sump; After start, the oil in low cylinder oil sump, a part flows directly into low cylinder pump chamber, and a part manually valve flows into high cylinder oil sump, then flows into high cylinder cylinder body.Meanwhile, after spending 6-10 minute, close manually operated valve again, form two-stage vacuum effect to separate high and low cylinder oil sump.Briefly, the programmed sequence of operations of this pump: 1, start shooting, 2, drive manually operated valve, 3, spend 6-10 minute after close manually operated valve.In practical operation, this mode of operation runs into a problem, and workman, due to reasons such as quality, usually ignores this operation, or has forgotten this operation, thus causes the fault of pump.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of throttle valve to substitute the manually operated valve of script, and throttle valve without the need to manual operation, thus decreases manual operation and to slip up the fault of the pump caused.
For achieving the above object, the utility model adopts following technological scheme, comprise throttle valve valve body, described throttle valve valve body comprises throttle valve gland and throttle valve seat, described throttle valve gland and throttle valve seat are threaded connection, gland through hole is provided with in described throttle valve gland, valve seat through-hole is provided with in described throttle valve seat, described gland through hole is communicated with valve seat through-hole, described gland through hole and valve seat through-hole connectivity part are connected with sealing gasket, described sealing gasket is provided with closed hole, described throttle valve gland is connected with locking nut relative to being connected one end with throttle valve seat, described locking nut internal thread is connected with adjusting screw, through hole is provided with in described adjusting screw, described through hole is communicated with gland through hole, the steel ball for controlling oily flow is provided with between described adjusting screw and sealing gasket, spring is connected with in described valve seat through-hole, described spring one end abuts with steel ball through closed hole.
Preferably, valve seat through-hole comprises connecting through hole and spring putting hole, and the diameter of described connecting through hole is less than the diameter of spring putting hole, and described connecting through hole and spring putting hole connectivity part form a step, described spring is positioned at spring putting hole, and the described spring the other end abuts with step.
Preferably, spring putting hole comprises sealing gasket putting hole, described sealing gasket putting hole is positioned at the other end that spring putting hole is communicated with connecting through hole, the diameter of described sealing gasket putting hole is greater than spring putting hole, described sealing gasket putting hole and spring putting hole connectivity part form a sealing gasket placement section, and described sealing gasket abuts with sealing gasket placement section.
Preferably, adjusting screw is provided with straight groove away from steel ball one end.
The utility model hinge structure is compared to be had: throttle valve valve body substitutes manually operated valve originally, and throttle valve without the need to manual operation, thus decreases manual operation and to slip up the fault of the pump caused.Described throttle valve valve body comprises throttle valve gland and throttle valve seat, and described throttle valve gland and throttle valve seat are threaded connection, like this can easy disassembly steel ball, sealing gasket and spring.Gland through hole is provided with in described throttle valve gland, valve seat through-hole is provided with in described throttle valve seat, described gland through hole is communicated with valve seat through-hole, described gland through hole and valve seat through-hole connectivity part are connected with sealing gasket, described sealing gasket is provided with closed hole, described throttle valve gland is connected with locking nut relative to being connected one end with throttle valve seat, described locking nut internal thread is connected with adjusting screw, through hole is provided with in described adjusting screw, described through hole is communicated with gland through hole, the steel ball for controlling oily flow is provided with between described adjusting screw and sealing gasket, effectively can carry out fuel feeding like this, spring is connected with in described valve seat through-hole, described spring one end abuts with steel ball through closed hole, effectively can be controlled steel ball by spring like this.
Accompanying drawing explanation
Fig. 1 partly cuts open structural representation when being throttle valve shutdown;
Fig. 2 is that throttle valve is opened a period of time and later halfly cutd open structural representation;
Fig. 3 is throttle-valve structure schematic diagram;
Fig. 4 is A portion enlarged view in Fig. 3.
Reference character: 1, locking nut, 2, adjusting screw, 21, through hole, 22, straight groove, 3, throttle valve gland, 31, gland through hole, 4, sealing gasket, 41, ring support, 42, annular groove, 5, throttle valve seat, 51, connecting through hole, 6, spring, 7, steel ball.
Embodiment
Be described further with reference to the throttle valve embodiment of accompanying drawing to the utility model double stage sliding valve vacuum pump.
A throttle valve for double stage sliding valve vacuum pump, comprises throttle valve valve body, and described throttle valve valve body substitutes manually operated valve originally, and throttle valve without the need to manual operation, thus decreases manual operation and to slip up the fault of the pump caused.Described throttle valve valve body comprises throttle valve gland 3 and throttle valve seat 5, gland through hole 31 is provided with in described throttle valve gland 3, valve seat through-hole is provided with in described throttle valve seat 5, described gland through hole 31 is communicated with valve seat through-hole, gland through hole 31 is communicated with one end inwall and is provided with internal thread with valve seat through-hole, valve seat through-hole outer wall is provided with outside thread, and both are affixed by screw thread.Like this can easy disassembly steel ball 7, sealing gasket 4 and spring 6, as long as steel ball 7 just can be taken out by mutually outward winding throttle valve gland 3 and throttle valve seat 5, then take out sealing gasket 4 and spring 6, the replacing facilitating seal ring and the cleaning facilitated throttle valve inside.Described throttle valve gland 3 is connected with locking nut 1 relative to being connected one end with throttle valve seat 5, described locking nut 1 internal thread is connected with adjusting screw 2, through hole 21 is provided with in described adjusting screw 2, described through hole 21 is communicated with gland through hole 31, can be that adjusting screw 2 is threaded connection with gland through hole 31, the degree of depth of gland through hole 31 can be entered by regulating and controlling screw 2 like this, as preferably can be fastening further with locking nut 1, prevent adjusting screw 2 from easing out.Described gland through hole 31 is connected with sealing gasket 4 with valve seat through-hole connectivity part; described sealing gasket 4 is provided with closed hole; the steel ball 7 for controlling oily flow is provided with between described adjusting screw 2 and sealing gasket 4; spring 6 is connected with in described valve seat through-hole; described spring 6 one end abuts with steel ball 7 through closed hole; in shutdown situation; valve seat through-hole can not produce negative pressure away from throttle valve gland 3 one end; due to the elastic force that spring 6 produces; steel ball 7 can withstand adjusting screw 2; seal through hole 21, prevent shutting down rear oil and constantly flow into pump chamber, affect the startup of pump.After start, vacuum pump produces vacuum, and valve seat through-hole is in negative pressure away from throttle valve gland 3 one end, and under the effect of the pressure, spring 6 can slowly compress, and steel ball 7 departs from the through hole 21 mouthfuls of adjusting screw 2, and now oil constantly can flow into the pump housing, plays lubrication.And along with the rising of degree of vacuum, pressure increase, spring 6 constantly compresses, and when reaching 1500Pa-2000 Pa, steel ball 7 can contact sealing gasket 4 completely, close closed hole, form sealing effect, make high cylinder, low cylinder oil-feed disengagement, form twin-stage effect, reach design degree of vacuum, doing so avoids manual operation and to slip up the impact brought.
Valve seat through-hole comprises connecting through hole 51 and spring putting hole, the diameter of described connecting through hole 51 is less than the diameter of spring putting hole, described connecting through hole 51 forms a step with spring 6 putting hole connectivity part, putting of spring 6 can be facilitated like this, described spring 6 can be positioned at spring 6 putting hole, and spring 6 another end abuts with step, can easily ensure abutting of spring 6 and steel ball 7 like this while dismounting spring 6, also can ensure the stability that spring 6 is laid, ensure that the normal operation of throttle valve.
Spring 6 putting hole comprises sealing gasket putting hole, described sealing gasket 4 putting hole is positioned at the other end that spring 6 putting hole is communicated with connecting through hole 51, the diameter of described sealing gasket putting hole is greater than spring putting hole, described sealing gasket putting hole and spring putting hole connectivity part form a sealing gasket placement section, described sealing gasket 4 abuts with sealing gasket placement section, like this placement that can facilitate sealing gasket 4 is set, ensure the dismounting facilitating sealing gasket 4 while sealing gasket 4 lays stability, facilitate the cleaning of throttle valve inside and sealing gasket 4 is changed.As preferably, gland through hole 31 has internal thread one end to be provided with step, and step part abuts with sealing gasket 4, can better clamp sealing gasket 4 like this, prevents it from rocking.
Adjusting screw 2 is provided with straight groove 22 away from steel ball 7 one end, uses the screw-driver of a word to regulate adjusting screw 2 very easily, ensures fully abutting of steel ball 7 and spring 6, thus the abundant sealing of steel ball 7 pairs of through holes when ensureing shutdown.
See Fig. 3 and Fig. 4, be provided with ring support 41 in the middle part of sealing gasket 4, sealing gasket 4 is flexible, and support 41 can be used for keeping sealing gasket 4 to be ring, ensures that closed hole is indeformable, makes steel ball 7 fully can seal up closed hole.Sealing gasket 4 is provided with annular groove 42 near throttle valve seat 5 side, annular groove 42 is positioned at immediately below ring support 41, when steel ball 7 abuts sealing gasket 4, steel ball 7 can, to both sides crush seal pad 4, make sealing gasket 4 produce deformation, enough spaces that had annular groove that deformation is had, make sealing gasket 4 be not easy to damage, as preferably, the cross section of annular groove 42 be semicircle, contribute to the recovery of sealing gasket 4 like this when steel ball 7 no longer extrudes, make sealing gasket 4 more not fragile.Sealing gasket 4 is provided with chamfering near steel ball 7 side, and chamfering cross section is circular arc and fits with steel ball 7, can better play sealing effect like this.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to the above embodiments, 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 throttle valve of a double stage sliding valve vacuum pump, comprise throttle valve valve body, it is characterized in that: described throttle valve valve body comprises throttle valve gland and throttle valve seat, described throttle valve gland and throttle valve seat are threaded connection, gland through hole is provided with in described throttle valve gland, valve seat through-hole is provided with in described throttle valve seat, described gland through hole is communicated with valve seat through-hole, described gland through hole and valve seat through-hole connectivity part are connected with sealing gasket, described sealing gasket is provided with closed hole, described throttle valve gland is connected with locking nut relative to being connected one end with throttle valve seat, described locking nut internal thread is connected with adjusting screw, through hole is provided with in described adjusting screw, described through hole is communicated with gland through hole, the steel ball for controlling oily flow is provided with between described adjusting screw and sealing gasket, spring is connected with in described valve seat through-hole, described spring one end abuts with steel ball through closed hole.
2. the throttle valve of double stage sliding valve vacuum pump according to claim 1, it is characterized in that: described valve seat through-hole comprises connecting through hole and spring putting hole, the diameter of described connecting through hole is less than the diameter of spring putting hole, described connecting through hole and spring putting hole connectivity part form a step, described spring is positioned at spring putting hole, and the described spring the other end abuts with step.
3. the throttle valve of double stage sliding valve vacuum pump according to claim 2, it is characterized in that: described spring putting hole comprises sealing gasket putting hole, described sealing gasket putting hole is positioned at the other end that spring putting hole is communicated with connecting through hole, the diameter of described sealing gasket putting hole is greater than spring putting hole, described sealing gasket putting hole and spring putting hole connectivity part form a sealing gasket placement section, and described sealing gasket abuts with sealing gasket placement section.
4. the throttle valve of the double stage sliding valve vacuum pump according to claims 1 to 3 any one, is characterized in that: described adjusting screw is provided with straight groove away from steel ball one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667126.XU CN204226202U (en) | 2014-11-10 | 2014-11-10 | The throttle valve of double stage sliding valve vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667126.XU CN204226202U (en) | 2014-11-10 | 2014-11-10 | The throttle valve of double stage sliding valve vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204226202U true CN204226202U (en) | 2015-03-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420667126.XU Active CN204226202U (en) | 2014-11-10 | 2014-11-10 | The throttle valve of double stage sliding valve vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204226202U (en) |
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2014
- 2014-11-10 CN CN201420667126.XU patent/CN204226202U/en active Active
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