CN211777880U - Automatic gas ballast of vacuum pump - Google Patents
Automatic gas ballast of vacuum pump Download PDFInfo
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- CN211777880U CN211777880U CN202020121767.0U CN202020121767U CN211777880U CN 211777880 U CN211777880 U CN 211777880U CN 202020121767 U CN202020121767 U CN 202020121767U CN 211777880 U CN211777880 U CN 211777880U
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- air inlet
- ballast
- sliding rod
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Abstract
The utility model relates to an automatic gas ballast of vacuum pump, which comprises a pump body with an air inlet channel and a gas ballast. A control cavity is arranged in the ballast, and an electromagnetic switch mechanism capable of sealing or opening the air inlet channel is arranged in the control cavity; the controller is electrically connected with the electromagnetic switch mechanism; the air inlet channel comprises an air inlet section and a sealing section, and the size of the cross section of the sealing section is larger than that of the air inlet section; the electromagnetic switch mechanism comprises an electromagnetic driving piece, a sliding rod and a sealing head, wherein the electromagnetic driving piece is fixed on the ballast and is in electromagnetic induction connection with the sliding rod, and the sliding rod is matched in the control cavity in a sliding mode along the axial direction; the sliding rod is sleeved with a return spring, the lower end of the sliding rod is fixed with the sealing head and extends into the sealing section, and the sealing head forms movable fit for abutting contact or separating from abutting contact at the joint surface of the sealing section and the air inlet section. The structure has the characteristics of automatically operating to prolong the service life of pump oil and improve the vacuum degree of the vacuum pump.
Description
Technical Field
The utility model relates to a vacuum pump technical field especially relates to an automatic gas town of vacuum pump.
Background
When the vacuum pump works, if the pumped gas contains condensable gas such as water vapor, and if the condensable gas reaches the saturated vapor pressure before being discharged out of the pump cavity, the condensable gas is condensed in oil, so that the pump oil is emulsified and deteriorated, the lubricating and sealing performance is deteriorated, and finally the performance of the vacuum pump is deteriorated. In order to avoid the situation, people add a ballast on the vacuum pump, if the ballast is opened when the vacuum pump works, before condensable gas contained in the pumped body is discharged out of the pump cavity, because a certain amount of air can be filled into the pump cavity when the ballast is opened, the partial pressure of steam in the exhaust cavity can be correspondingly reduced, and when the partial pressure of the steam is lower than the saturated steam pressure at the pump temperature, the steam can be discharged out of the pump along with the gas and can not be condensed in pump oil. However, the gas ballast used in the vacuum pump at present usually consists of a screw thread and an O-ring seal, which are shown in fig. 1 and 2, and the gas dosage is controlled by the rotation of the screw thread, and the switching mode needs manual work.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome above-mentioned problem, and provide an automatic gas town of vacuum pump, have the characteristics of automatic operation in order to improve the life and the vacuum pump vacuum of pump oil.
The technical scheme of the utility model is that:
an automatic gas town of vacuum pump, including the pump body, gas town, be equipped with inlet channel on the pump body, gas town connects on inlet channel, its characterized in that: a control cavity is arranged in the gas ballast, and an electromagnetic switch mechanism capable of sealing or opening the air inlet channel is arranged in the control cavity; the controller is electrically connected with the electromagnetic switch mechanism;
the air inlet channel comprises an air inlet section connected with the inner cavity of the pump body and a sealing section connected with the ballast, and the cross section size of the sealing section is larger than that of the air inlet section;
the electromagnetic switch mechanism comprises an electromagnetic driving piece, a sliding rod and a sealing head, wherein the electromagnetic driving piece is fixed on a gas ballast and is in electromagnetic induction connection with the sliding rod, so that the sliding rod is matched in the control cavity in a sliding manner along the axial direction; the sliding rod is sleeved with a return spring, the lower end of the sliding rod is fixedly connected with the sealing head and extends into the sealing section, and the sealing head forms movable fit for abutting contact or separating from the abutting contact at the joint face of the sealing section and the air inlet section.
Borrow by above-mentioned structure, the utility model discloses a controller control electromagnetic drive spare relies on electromagnetic induction between electromagnetic drive spare and the slide bar to drive the slide bar and slides about, controls sealed head from this and opens or plug up inlet channel, realizes automatic switch's function.
Further, the automatic gas town of vacuum pump in, be equipped with at least one inlet port on the seal segment inner wall, the inlet port passes through electromagnetic switch mechanism and inlet channel intercommunication. When the slide rod in the electromagnetic switch mechanism moves upwards, the sealing head opens the air inlet channel, and the air inlet is communicated with the air inlet channel, so that a certain amount of air is filled into the inner cavity of the pump body.
Further, in the automatic ballast of the vacuum pump of the present invention, the ballast includes an outer valve seat and an inner valve seat, the outer valve seat is fixed on the pump body, the inner valve seat is disposed in the outer valve seat, and the lower end surface of the inner valve seat is concavely disposed to form a control chamber; the lower end of the inner valve seat extends into the sealing section and the outer wall of the inner valve seat is concavely provided with a circle of sealing groove, a sealing ring is embedded into the sealing groove, and the sealing ring is in sealing fit with the inner wall of the sealing section. This structure can guarantee that gas town and pump body junction have good airtight effect.
Further, in the automatic gas town of vacuum pump of the utility model, reset spring supports to press and connects between interior disk seat and slide bar.
Further, automatic gas town of vacuum pump in, the longitudinal section of sealed head is the shape of falling T, and it includes perpendicular portion and horizontal portion, the concave installing port that is equipped with of slide bar lower extreme, perpendicular portion inserts in the installing port and fixes with it, horizontal portion and inlet channel cooperate.
Further, in the automatic gas town of vacuum pump of the present invention, the cross section of the sealing head and the air inlet channel is larger than the cross section of the air inlet section.
Further, the automatic gas town of vacuum pump in the utility model, the central axis of seal section, the section of admitting air, control chamber all coincides.
The utility model has the advantages that:
1. the utility model discloses simple structure, reasonable in design upgrades to one set of automatic control device in the principle of current gas town, but the switch of automatic control gas town when vacuum pump during operation need not the rotatory gas town of artificial screw, and more for laborsaving convenience, promoted work efficiency, can show life and the vacuum pump vacuum that improves the pump oil.
2. The utility model adopts electromagnetic induction to realize the axial sliding of the sliding rod in the control cavity, has large driving force, fast response speed, smooth sliding, accurate displacement, more rapid on-off and long service life; and through the sealing head inside the gas ballast blocking air inlet channel that slides, can not cause the sealing washer between its and the pump body to damage because of the rotatory gas ballast of screw thread repeatedly, sealed effect is better.
Drawings
Fig. 1 is a schematic structural view of a gas ballast in a closed state in the prior art.
Fig. 2 is a schematic structural view of a gas ballast in an open state in the prior art.
Fig. 3 is a schematic structural view of the gas ballast of the present invention in a closed state.
Fig. 4 is a schematic structural view of the ballast of the present invention in an open state.
Detailed Description
The present invention will now be further described with reference to the accompanying drawings:
referring to fig. 3 and 4, the automatic gas ballast of the vacuum pump according to the embodiment includes a pump body 1 and a gas ballast 2, wherein an air inlet channel 3 is arranged on the pump body 1, and the gas ballast 2 is connected to the air inlet channel 3. A control cavity 4 is arranged in the gas ballast 2, and an electromagnetic switch mechanism capable of sealing or opening the air inlet channel 3 is arranged in the control cavity 4; the electromagnetic switch mechanism is electrically connected with the power supply, and the controller is electrically connected with the electromagnetic switch mechanism.
The air inlet channel 3 comprises an air inlet section 301 connected with the inner cavity of the pump body 1 and a sealing section 302 connected with the ballast 2, and the cross section size of the sealing section 302 is larger than that of the air inlet section 301; at least one air inlet hole 5 is arranged on the inner wall of the sealing section 302, and the air inlet hole 5 is communicated with the air inlet channel 3 through an electromagnetic switch mechanism. The central axes of the sealing section 302, the air inlet section 301 and the control cavity 4 are all coincident.
The ballast 2 comprises an outer valve seat 201 and an inner valve seat 202, the outer valve seat 201 is fixed on the pump body 1, the inner valve seat 202 is arranged in the outer valve seat 201, and the lower end face of the inner valve seat is concavely arranged to form a control cavity 4; the lower end of the inner valve seat 202 extends into the sealing section 302 and a circle of sealing groove is concavely arranged on the outer wall of the sealing section 302, a sealing ring 6 is embedded into the sealing groove, and the sealing ring 6 is in sealing fit with the inner wall of the sealing section 302.
The electromagnetic switch mechanism comprises an electromagnetic driving piece, a sliding rod 7 and a sealing head 8, wherein the electromagnetic driving piece is fixed on the ballast 2 and is in electromagnetic induction connection with the sliding rod 7, so that the sliding rod 7 is matched in the control cavity 4 in a sliding manner along the axial direction; the sliding rod 7 is sleeved with a return spring 9, the lower end of the sliding rod 7 is fixedly connected with the sealing head 8 and extends into the sealing section 302, and the sealing head 8 forms a movable fit which is abutted to or separated from the abutting surface of the sealing section 302 and the air inlet section 301. The return spring 9 is connected between the inner valve seat 202 and the sliding rod 7 in a pressing manner. More specifically, the longitudinal section of sealing head 8 is the shape of falling T, and it includes perpendicular portion and horizontal portion, 7 lower extremes of slide bar are concave to be equipped with a installing port, perpendicular portion inserts in the installing port and fixed with it, the horizontal portion cooperatees with inlet channel 3. The cross section of the sealing head 8 matched with the air inlet channel 3 is larger than the cross section size of the air inlet section 301. It should be noted that the electromagnetic driving element in the present embodiment can adopt an electromagnetic coil assembly, but is not limited to the above-mentioned device, as long as it can electromagnetically induce with the sliding rod 7 to drive the sliding rod 7 to axially slide.
The structure can automatically control the gas ballast 2 to be opened and closed when the vacuum pump works, and the sealing head 8 is in a normally closed state, namely, the sealing head is abutted and contacted with the air inlet channel 3 downwards to be sealed under the action of the return spring 9; when the pump body 1 works, the electromagnetic driving piece is controlled to drive the sliding rod 7 to slide upwards under the set condition of the controller (such as the service time of the vacuum pump or the pressure condition in the pump cavity), the sealing head 8 is separated from the joint surface of the sealing section 302 and the air inlet section 301, the air inlet channel 3 is opened, and a certain amount of air is introduced into the exhaust cavity of the vacuum pump. The controller can operate automatically completely, and can also control the starting condition of the electromagnetic switch mechanism in a manual setting mode. Compared with the prior art structure shown in fig. 1 and 2, the present embodiment can realize automatic and precise control.
The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.
Claims (7)
1. The utility model provides an automatic gas of vacuum pump is pressed, includes the pump body, gas is pressed, be equipped with inlet channel on the pump body, the gas is pressed and is connected on inlet channel, its characterized in that: a control cavity is arranged in the gas ballast, and an electromagnetic switch mechanism capable of sealing or opening the air inlet channel is arranged in the control cavity; the controller is electrically connected with the electromagnetic switch mechanism;
the air inlet channel comprises an air inlet section connected with the inner cavity of the pump body and a sealing section connected with the ballast, and the cross section size of the sealing section is larger than that of the air inlet section;
the electromagnetic switch mechanism comprises an electromagnetic driving piece, a sliding rod and a sealing head, wherein the electromagnetic driving piece is fixed on a gas ballast and is in electromagnetic induction connection with the sliding rod, so that the sliding rod is matched in the control cavity in a sliding manner along the axial direction; the sliding rod is sleeved with a return spring, the lower end of the sliding rod is fixedly connected with the sealing head and extends into the sealing section, and the sealing head forms movable fit for abutting contact or separating from the abutting contact at the joint face of the sealing section and the air inlet section.
2. The automatic ballast for a vacuum pump of claim 1, wherein: the inner wall of the sealing section is provided with at least one air inlet hole, and the air inlet hole is communicated with the air inlet channel through an electromagnetic switch mechanism.
3. The automatic ballast for a vacuum pump of claim 1, wherein: the gas ballast comprises an outer valve seat and an inner valve seat, the outer valve seat is fixed on the pump body, the inner valve seat is arranged in the outer valve seat, and the lower end face of the inner valve seat is concavely arranged to form a control cavity; the lower end of the inner valve seat extends into the sealing section and the outer wall of the inner valve seat is concavely provided with a circle of sealing groove, a sealing ring is embedded into the sealing groove, and the sealing ring is in sealing fit with the inner wall of the sealing section.
4. The automatic ballast for a vacuum pump of claim 3, wherein: the reset spring is connected between the inner valve seat and the sliding rod in a propping and pressing mode.
5. The automatic ballast for a vacuum pump of claim 1, wherein: the sealing head is characterized in that the longitudinal section of the sealing head is in an inverted T shape and comprises a vertical part and a transverse part, the lower end of the sliding rod is concavely provided with a mounting opening, the vertical part is inserted into the mounting opening and is fixed with the mounting opening, and the transverse part is matched with the air inlet channel.
6. The automatic ballast for a vacuum pump of claim 1, wherein: the cross section of the sealing head matched with the air inlet channel is larger than the size of the cross section of the air inlet section.
7. The automatic ballast for a vacuum pump of claim 1, wherein: the central axes of the sealing section, the air inlet section and the control cavity are all overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121767.0U CN211777880U (en) | 2020-01-19 | 2020-01-19 | Automatic gas ballast of vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020121767.0U CN211777880U (en) | 2020-01-19 | 2020-01-19 | Automatic gas ballast of vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211777880U true CN211777880U (en) | 2020-10-27 |
Family
ID=72893989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020121767.0U Active CN211777880U (en) | 2020-01-19 | 2020-01-19 | Automatic gas ballast of vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211777880U (en) |
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2020
- 2020-01-19 CN CN202020121767.0U patent/CN211777880U/en active Active
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