CN219388169U - Composite sealing device for screw vacuum pump - Google Patents
Composite sealing device for screw vacuum pump Download PDFInfo
- Publication number
- CN219388169U CN219388169U CN202320185950.0U CN202320185950U CN219388169U CN 219388169 U CN219388169 U CN 219388169U CN 202320185950 U CN202320185950 U CN 202320185950U CN 219388169 U CN219388169 U CN 219388169U
- Authority
- CN
- China
- Prior art keywords
- air inlet
- inlet pipe
- speed sensor
- iron core
- vacuum pump
- 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.)
- Active
Links
Landscapes
- Jet Pumps And Other Pumps (AREA)
Abstract
The utility model discloses a compound sealing device for a screw vacuum pump, which relates to the technical field of vacuum pump sealing and comprises a first air inlet pipe, a second air inlet pipe, an air speed sensor module and an electromagnetic valve module; one end of the first air inlet pipe is connected with an air inlet port of the screw vacuum pump, the other end of the first air inlet pipe is connected with the side wall of the second air inlet pipe, and the inner cavities of the first air inlet pipe and the second air inlet pipe are communicated; the wind speed sensor module consists of an induction end and a control end, wherein the induction end of the wind speed sensor module is arranged in the inner cavity of the first air inlet pipe, and the control end of the wind speed sensor is arranged on the outer wall of the first air inlet pipe; the electromagnetic valve is matched with the wind speed sensor to control the sealing of the air inlet, and the triggering condition of the electromagnetic valve can be adjusted according to the actual working condition requirement, so that the requirements of high standard and high precision of working condition operation are met.
Description
Technical Field
The utility model relates to the technical field of vacuum pump sealing, in particular to a composite sealing device for a screw vacuum pump.
Background
The screw vacuum pump is an air extraction device which uses a pair of screws to perform synchronous high-speed reverse rotation in a pump shell to generate air suction and air exhaust effects, is a newer product of an oil seal vacuum pump, can extract gas occasions containing a large amount of water vapor and a small amount of dust, and is widely applied to the fields of enterprises with high requirements on cleaning vacuum, such as domestic pharmacy, chemical industry, semiconductors and the like.
The vacuum pump has higher requirement on air tightness, and under long-time working, a gap is easy to generate at the interface of the pipeline and the air inlet of the pump body, so that air leakage occurs during air suction; when the pipeline leaks air, the vacuum pump cannot work normally, and when serious, the pipeline can also influence the inside of the vacuum pump, so that the service life of the vacuum pump is reduced.
Based on the above problems, the Chinese patent utility model discloses a vacuum pump sealing protection structure (patent number: CN 202221916790.4), which is characterized in that a spring and a conical sealing block are arranged at an air inlet of the vacuum pump to form a sealing layer formed by combining a one-way valve, a clamping plate and a fixing buckle, so as to prevent air leakage; however, the research experiment shows that the clamping plate and the fixing buckle are arranged at the air inlet and are only applicable to the fixation of soft materials, such as rubber tubes; because most of pump body air inlets and pipelines are made of hard metal materials at present, the sealing layer has limited effect; the one-way valve formed by combining the spring and the conical sealing block can play a role in one-way sealing, but has strict requirements on the wind speed range of the pump body, and the elastic force of the spring is difficult to overcome when the wind speed is low, so that the sealing block keeps static to block the air inlet; when the wind speed is high, the spring is compressed and tightened, and the flow of the internal channel of the one-way valve is influenced; and after the spring is in service for a long time in the environment, the elastic coefficient can be changed, so that the application range of the spring to wind speed is changed, and the working condition calculation difficulty is increased.
It should be noted that the above-mentioned statement is not detraction of the prior art patent, but the inventor derives the conclusion from the analysis of the technical scheme, and the above-mentioned patent technology can play a certain sealing effect for some vacuum pumps, but is not applicable to the operation of the screw vacuum pump with a hard metal pipeline and a high precision requirement.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the compound sealing device for the screw vacuum pump, which controls the sealing of the air inlet through the electromagnetic valve matched with the air speed sensor, and can adjust the triggering condition of the electromagnetic valve according to the actual working condition requirement, thereby meeting the requirements of high standard and high precision of working condition operation.
The technical scheme adopted for solving the technical problems is as follows: a compound sealing device for a screw vacuum pump comprises a first air inlet pipe, a second air inlet pipe, an air speed sensor module and an electromagnetic valve module;
one end of the first air inlet pipe is connected with an air inlet port of the screw vacuum pump, the other end of the first air inlet pipe is connected with the side wall of the second air inlet pipe, and the inner cavities of the first air inlet pipe and the second air inlet pipe are communicated; the wind speed sensor module consists of an induction end and a control end, wherein the induction end of the wind speed sensor module is arranged in the inner cavity of the first air inlet pipe, and the control end of the wind speed sensor is arranged on the outer wall of the first air inlet pipe; when the vacuum pump is started, high-intensity air flow is generated, the induction end of the air speed sensor senses the air flow and then indicates that the vacuum pump starts to work, and signals are transmitted to the control end.
One end of the second air inlet pipe is provided with an air inlet, and the other end of the second air inlet pipe is provided with an electromagnetic valve module, wherein the electromagnetic valve module comprises a fixed iron core, a movable iron core, a compression spring, a valve core and an electromagnetic coil; one end of the fixed iron core is fixedly arranged on the end face of the second air inlet pipe, the other end of the fixed iron core is connected with one end of the movable iron core through a compression spring, the other end of the movable iron core is connected with a sealing plug through a valve core, and electromagnetic coils are arranged around the fixed iron core and the movable iron core. When the electromagnetic coil is not electrified, the compression spring is in a natural extension state, at the moment, the sealing plug is tightly abutted against the air inlet of the second air inlet pipe, and the air inlet is in a sealing state; when the electromagnetic coil is electrified, magnetic attraction is generated between the movable iron core and the fixed iron core, so that the compression spring is contracted, the sealing plug leaves the air inlet, and the air inlet is in an open state.
The outside of second air-supply line is equipped with battery pack and automatically controlled switch, and battery pack electricity is connected wind speed sensor module and solenoid valve module, still is equipped with automatically controlled switch between battery pack and the solenoid valve module, and automatically controlled switch electricity is connected wind speed sensor's control end. The battery assembly is used for respectively providing electric energy for the wind speed sensor module and the electromagnetic valve module; the control end of the wind speed sensor module transmits a signal for starting the vacuum pump to the electric control switch, so that the electric control switch is closed to form a closed circuit, and the electromagnetic coil is electrified.
The sealing plug is preferably a rubber sealing plug.
The sealing plug and the air inlet of the second air inlet pipe are both of conical structures.
The composite sealing device for the screw vacuum pump has the beneficial effects that when the vacuum pump does not work, the electric control switch is not closed, the electromagnetic coil is not electrified, and the sealing plug is abutted against the air inlet under the action of the compression spring, so that the air inlet is in a sealing state, and air leakage is avoided; when the vacuum pump starts to work, an air flow is generated in the air inlet pipe to trigger the induction end of the air speed sensor, after the air speed reaches a set value of the induction end, the induction end transmits a signal to the control end, the control end sends an instruction signal to the electric control switch, the electric control switch is closed to form a closed circuit, magnetic attraction is generated between iron cores, so that the compression spring is contracted, and the sealing plug leaves the air inlet to form a passage; after the vacuum pump stops working, the wind speed sensor sends a command to the electric control switch again, so that the electric control switch is in an unclosed state again, the electromagnetic coil is powered off, the magnetic force between the iron cores disappears, and the sealing plug is propped against the air inlet again under the action of the compression spring. Therefore, the triggering instruction condition of the wind speed sensor can be adjusted according to the actual working condition requirement, so that the opening and closing of the electromagnetic valve are controlled, and the requirements of high standard and high precision of the working condition operation of the screw vacuum pump at present are met.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic circuit diagram of the present utility model.
The air inlet valve is characterized by comprising a first air inlet pipe 1, a second air inlet pipe 2, a sensing end 3, a control end 4, an air inlet 5, a fixed iron core 6, a movable iron core 7, a compression spring 8, a valve core 9, a solenoid 10, a sealing plug 11, a battery component 12 and an electric control switch 13.
Detailed Description
The present utility model will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Referring to fig. 1-2, the present embodiment provides a composite sealing device for a screw vacuum pump, which includes a first air inlet pipe 1, a second air inlet pipe 2, an air velocity sensor module and an electromagnetic valve module;
the right end of the first air inlet pipe 1 is connected with an air inlet port of the screw vacuum pump through a flange plate, the left end of the first air inlet pipe 1 is fixedly connected with the right side wall of the second air inlet pipe 2, and the inner cavities of the first air inlet pipe 1 and the second air inlet pipe 2 are communicated; the wind speed sensor module consists of an induction end 3 and a control end 4, wherein the induction end 3 is arranged at the center of an inner cavity of the first air inlet pipe 1 through a bracket, and the control end 4 is arranged on the outer wall of the first air inlet pipe 1.
The second air inlet pipe 2 is vertical to the first air inlet pipe 1 in space position, the top end of the second air inlet pipe 2 is provided with an air inlet 5, the bottom end of the second air inlet pipe 2 is provided with an electromagnetic valve module, and the electromagnetic valve module comprises a fixed iron core 6, a movable iron core 7, a compression spring 8, a valve core 9 and an electromagnetic coil 10; the bottom end of the fixed iron core 6 is fixedly arranged on the bottom end face of the second air inlet pipe 2, the top end of the fixed iron core 6 is connected with the bottom end of the movable iron core 7 through a compression spring 8, the other end of the movable iron core 7 is connected with a sealing plug 11 through a valve core 9, and electromagnetic coils 10 are arranged around the fixed iron core 6 and the movable iron core 7. When the electromagnetic coil 10 is not electrified, the compression spring 8 is in a natural extension state, at the moment, the sealing plug 11 is tightly abutted against the air inlet 5 of the second air inlet pipe 2, and the air inlet 5 is in a sealing state; when the electromagnetic coil 10 is electrified, magnetic attraction is generated between the movable iron core 6 and the fixed iron core 7, so that the compression spring 8 is contracted, the sealing plug 11 moves downwards, and the air inlet 5 is in an open state.
In order to realize the linkage action of the wind speed sensor module and the electromagnetic valve module; the battery assembly 12 and the electric control switch 13 are arranged outside the second air inlet pipe 2, the battery assembly 12 is electrically connected with the air speed sensor module and the electromagnetic valve module, the electric control switch 13 is further arranged between the battery assembly 13 and the electromagnetic valve module, and the electric control switch 13 is electrically connected with the control end 4 of the air speed sensor. The battery assembly 12 is used to supply power to the wind speed sensor module and the solenoid valve module, respectively.
In order to ensure tightness, the sealing plug 11 is preferably a rubber sealing plug, and both the sealing plug 11 and the air inlet 5 of the second air inlet duct 2 are designed to have a conical structure.
The working principle of the device is as follows: when the vacuum pump does not work, the electric control switch 13 is in an unclosed state, the electromagnetic coil 10 is not electrified, and the sealing plug 11 is abutted against the air inlet 5 under the action of the compression spring 8, so that the air inlet 5 is in a sealed state, and air leakage is avoided.
When the vacuum pump starts to work, air flow is generated in the second air inlet pipe 2, the induction end 3 of the air speed sensor is triggered, after the air speed reaches the set value of the induction end 3, the induction end 3 transmits a signal to the control end 4, the control end 4 sends an instruction signal to the electric control switch 13, the electric control switch 13 is closed to form a closed circuit, magnetic attraction force is generated between the fixed iron core 6 and the movable iron core 7, the compression spring 8 is contracted, and the sealing plug 11 moves downwards to leave the air inlet 5 to form a passage.
After the vacuum pump stops working, the wind speed sensor sends out an instruction to the electric control switch 13 again, so that the electric control switch 13 is in an unclosed state, the electromagnetic coil 10 is powered off at the moment, the magnetic force between the fixed iron core 6 and the movable iron core 7 disappears, and the sealing plug 11 is propped against the air inlet 5 again under the action of the compression spring.
The structure and the related circuit principle of the wind speed sensor module, the electromagnetic valve module and the electric control switch in the embodiment all belong to the conventional technology in the field, and the proper module model can be selected according to different screw vacuum pump models.
Of course, the above description is not limited to the above examples, and the technical features of the present utility model that are not described may be implemented by or by using the prior art, which is not described herein again; the above examples and drawings are only for illustrating the technical scheme of the present utility model and not for limiting the same, and the present utility model has been described in detail with reference to the preferred embodiments, and it should be understood by those skilled in the art that changes, modifications, additions or substitutions made by those skilled in the art without departing from the spirit of the present utility model and the scope of the appended claims.
Claims (2)
1. The composite sealing device for the screw vacuum pump is characterized by comprising a first air inlet pipe (1), a second air inlet pipe (2), an air speed sensor module and an electromagnetic valve module;
one end of the first air inlet pipe (1) is connected with an air inlet port of the screw vacuum pump, the other end of the first air inlet pipe (1) is connected with the side wall of the second air inlet pipe (2), and the inner cavities of the first air inlet pipe (1) and the second air inlet pipe (2) are communicated; the wind speed sensor module consists of an induction end (3) and a control end (4), wherein the induction end (3) of the wind speed sensor module is arranged in the inner cavity of the first air inlet pipe (1), and the control end (4) of the wind speed sensor is arranged on the outer wall of the first air inlet pipe (1);
an air inlet (5) is formed in one end of the second air inlet pipe (2), an electromagnetic valve module is arranged at the other end of the second air inlet pipe (2), and the electromagnetic valve module comprises a fixed iron core (6), a movable iron core (7), a compression spring (8), a valve core (9) and an electromagnetic coil (10); one end of a fixed iron core (6) is fixedly arranged on the end face of the second air inlet pipe (2), the other end of the fixed iron core (6) is connected with one end of a movable iron core (7) through a compression spring (8), the other end of the movable iron core (7) is connected with a sealing plug (11) through a valve core (9), and electromagnetic coils (10) are arranged around the fixed iron core (6) and the movable iron core (7);
the outside of second air-supply line (2) is equipped with battery pack (12) and automatically controlled switch (13), and battery pack (12) electricity is connected wind speed sensor module and solenoid valve module still is equipped with between battery pack (12) and the solenoid valve module automatically controlled switch (13), and automatically controlled switch (13) electricity is connected wind speed sensor's control end (4).
2. The composite sealing device for the screw vacuum pump according to claim 1, wherein the sealing plug (11) and the air inlet (5) of the second air inlet pipe (2) are both in conical structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320185950.0U CN219388169U (en) | 2023-02-11 | 2023-02-11 | Composite sealing device for screw vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320185950.0U CN219388169U (en) | 2023-02-11 | 2023-02-11 | Composite sealing device for screw vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219388169U true CN219388169U (en) | 2023-07-21 |
Family
ID=87168751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320185950.0U Active CN219388169U (en) | 2023-02-11 | 2023-02-11 | Composite sealing device for screw vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219388169U (en) |
-
2023
- 2023-02-11 CN CN202320185950.0U patent/CN219388169U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN219388169U (en) | Composite sealing device for screw vacuum pump | |
| ES8501102A1 (en) | Device for the perception of gas flow | |
| CN206299871U (en) | Disconnecting link formula HTHP zero leakage magnetic valve | |
| CN2787952Y (en) | Water outlet valve with permanent magnets | |
| CN216201019U (en) | Solenoid valve control system and solenoid valve | |
| CN207018610U (en) | A kind of piston type vacuum coaxial valve using vacuum as power gas source | |
| CN206035754U (en) | Energy -conserving low noise air compressor | |
| CN210372244U (en) | Pneumatic control valve | |
| CN2295092Y (en) | Water-pressure linkage gas electromagnetic valve | |
| CN207673929U (en) | A kind of double two-bit triplet solenoid valves of integrated form | |
| CN219493053U (en) | Electric butterfly valve device of vacuum pump | |
| CN203404471U (en) | Air inlet control valve of screw compressor | |
| CN113028300A (en) | Prevent leaking acid gas pipeline | |
| CN203477396U (en) | Pneumatic magnetic valve | |
| CN216862947U (en) | Automatic-opening and closing material blowing assisting valve for pneumatic conveying | |
| CN219345652U (en) | Bistable two-position three-way electromagnetic valve with improved movable iron core | |
| CN215445166U (en) | Pressure relief type pneumatic control valve | |
| CN219809438U (en) | Diaphragm valve pilot type controller | |
| CN207364407U (en) | A kind of energy-saving drainage valve | |
| CN220027606U (en) | Gap coating valve | |
| CN210770325U (en) | High-frequency opening and closing leakage-free high-frequency switch valve | |
| CN209743720U (en) | Gas proportional valve | |
| CN221083615U (en) | Electromagnetic valve and electronic sphygmomanometer with same | |
| CN209511236U (en) | A kind of nitrogen injecting valua door for oil draining nitrogen filling fire extinguishing device | |
| CN214789312U (en) | Straight-through electric control valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |