CN220910002U - Pressure maintaining structure of rotary vane vacuum pump - Google Patents
Pressure maintaining structure of rotary vane vacuum pump Download PDFInfo
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- CN220910002U CN220910002U CN202322616338.7U CN202322616338U CN220910002U CN 220910002 U CN220910002 U CN 220910002U CN 202322616338 U CN202322616338 U CN 202322616338U CN 220910002 U CN220910002 U CN 220910002U
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- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 29
- 238000003825 pressing Methods 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model provides a pressure maintaining structure of a rotary vane vacuum pump, and belongs to the field of vacuumizing equipment. It has solved the loose problem of current vacuum pump structure. In the utility model, the vacuum pump comprises a bracket with an air inlet runner arranged inside, an inlet of the air inlet runner is arranged on the top wall of the bracket, the pressure maintaining structure comprises a supporting block fixed on the top wall of the bracket and a vacuum gauge arranged on one side of the supporting block, a strip-shaped air flow channel is formed in the supporting block, and two ends of the air flow channel are respectively provided with an air inlet hole and an air outlet hole; the middle part of the air flow channel is a diversion channel which is horizontally penetrated, two ends of the diversion channel are respectively provided with a diversion hole and a detection hole for connecting a vacuum gauge, the air inlet hole is communicated with the middle part of the diversion channel, and two ends of the air outlet hole are respectively communicated with the diversion hole and an inlet of the air inlet channel; the guide hole is provided with a control component for controlling the on-off of the air inlet and the air outlet. The pressure maintaining structure of the rotary vane vacuum pump is compact.
Description
Technical Field
The utility model belongs to the field of vacuumizing equipment, and relates to a rotary vane vacuum pump, in particular to a pressure maintaining structure of the rotary vane vacuum pump.
Background
The working principle of the rotary vane vacuum pump is that the eccentric rotor is utilized to form a rotary volume change in the pump cavity so as to achieve the aim of vacuumizing.
The current pressure maintaining method of the rotary vane vacuum pump is as follows: closing the vacuum pump inlet valve, cutting off the power source of the vacuum pump, and allowing the vacuum pump to continue working under the condition that the vent valve is opened. For realizing the quick closing of the vacuum pump inlet valve, a corresponding structure is provided by people, a vacuum pump gas protection device (application number: 202122614696.5) disclosed in China patent library comprises an instrument panel, the instrument panel is arranged at the side part of the vacuum pump, the bottom of the back side surface of the instrument panel is provided with a lower pipeline adapter seat, the upper part of the back side surface of the instrument panel is provided with an upper pipeline adapter seat, the bottom of the front side surface of the instrument panel is provided with an air filter, the air filter is connected with an air inlet connector, the air filter is communicated with the lower pipeline adapter seat through an electromagnetic valve, a decompression locking valve, a barometer and a barometer are sequentially arranged in the middle part of the front side surface from bottom to top and are communicated with the lower pipeline adapter seat, the barometer is communicated with the upper pipeline adapter seat, a central transition connector communicated with the upper pipeline adapter seat is arranged above the upper pipeline adapter seat and is positioned at the back side of the instrument panel, an air outlet pipeline is led out from the central transition connector, the air outlet pipeline is arranged on the air outlet pipeline, and the air outlet pipeline is connected with a vacuum pump body through a vacuum connector.
The protection device has the advantages of high efficiency, convenient use and the like by arranging the electromagnetic valve on the air inlet path to quickly realize air inlet on-off. However, this device has a problem: the electromagnetic valve and the barometer are distributed along the gas flowing direction, the distribution is loose, and the larger space is occupied.
Disclosure of utility model
The utility model aims to solve the problems in the prior art and provides a pressure maintaining structure of a rotary vane vacuum pump with a compact structure.
The aim of the utility model can be achieved by the following technical scheme: the rotary vane vacuum pump pressure maintaining structure is characterized in that the pressure maintaining structure comprises a support block fixed on the top wall of the support and a vacuum gauge arranged on one side of the support block, a strip-shaped air flow channel is formed in the support block, and air inlets and air outlets are respectively formed at two ends of the air flow channel; the middle part of the air flow channel is a diversion channel which is horizontally penetrated, two ends of the diversion channel are respectively provided with a diversion hole and a detection hole for connecting a vacuum gauge, the air inlet hole is communicated with the middle part of the diversion channel, and two ends of the air outlet hole are respectively communicated with the diversion hole and an inlet of the air inlet channel; the guide hole is provided with a control component for controlling the on-off of the air inlet and the air outlet.
The air flow channel middle part is the level and runs through the setting, and vacuum gauge and control assembly set up respectively at air flow channel middle part both ends, can effectively shorten the distance between vacuum gauge and the control assembly, make pressurize structure overall structure compacter, reduce space occupation.
In the pressure maintaining structure of the rotary vane vacuum pump, the inner wall of the diversion channel is coaxially formed with a sealing ring, and the middle part of the diversion channel is communicated with the diversion hole by the sealing ring; the control assembly comprises a valve rod horizontally arranged in the diversion hole in a sliding mode and a driving piece fixed outside the supporting block, sealing is formed between the side wall of the valve rod and the inner wall of the diversion hole, the outer end of the valve rod extends out of the diversion hole and is connected with the driving piece, the driving piece is used for pushing the valve rod to axially reciprocate and translate along the diversion channel, and the valve rod can be tightly pressed on the end face of the sealing ring to seal the port of the sealing ring. The valve rod part is accommodated in the flow guide hole, and the distance between the control assembly and the vacuum gauge can be shortened under the condition that the normal flow of gas is not influenced, so that the whole structure is more compact.
In the pressure maintaining structure of the rotary vane vacuum pump, the driving piece comprises a hollow electromagnetic coil, the valve rod is made of magnetic conductive materials, and the outer end of the valve rod is inserted into an inner hole of the electromagnetic coil; the inner end of the valve rod is sleeved with a spring which enables the valve rod to have inward movement trend. The electromagnetic coil is powered on and powered off to control the valve rod to move, and the valve rod has the advantages of being simple in structure, stable in work and the like.
In the pressure maintaining structure of the rotary vane vacuum pump, a guide pipe made of non-magnetic material is horizontally and fixedly arranged in the electromagnetic coil, the inner end of the guide pipe extends into the diversion hole, and the outer wall of the guide pipe is sealed with the inner wall of the diversion hole through a sealing ring; the inner end and the outer end of the guide pipe are respectively in an open shape and a closed shape, the shape and the size of the inner hole of the guide pipe are matched with those of the valve rod, and the outer end of the valve rod is inserted into the guide pipe. The valve rod forms the seal through pipe and sealing washer cooperation and water conservancy diversion hole inner wall to change dynamic seal into quiet seal, prolong the sealed duration that forms between valve rod and the water conservancy diversion hole, improve this pressurize structure's life-span.
In the pressure maintaining structure of the rotary vane vacuum pump, the outer side wall of the valve rod is axially provided with the air passing hole in a penetrating mode, and the phenomenon that the valve rod normally moves in a guide pipe is prevented from being blocked by air.
In the pressure maintaining structure of the rotary vane vacuum pump, the annular limiting seat is coaxially formed on the outer wall of the inner end of the valve rod, and two ends of the spring respectively act on the inner end face of the guide pipe and the limiting seat.
In the pressure maintaining structure of the rotary vane vacuum pump, an annular cushion block is clamped between the electromagnetic coil and the supporting block, and the annular cushion block is sleeved on the guide pipe and fixedly connected with the supporting block; the outer end of the guide pipe extends out of the electromagnetic coil and is in threaded connection with a plastic pressing cap, and the plastic pressing cap is tightly pressed on the electromagnetic coil; an annular blocking shoulder is formed on the outer wall of the inner end of the guide pipe, and the annular blocking shoulder is tightly pressed on the annular cushion block. Under the cooperation of the annular cushion block and the plastic press cap, the electromagnetic coil and the catheter are synchronously positioned, and the assembly is convenient.
In the pressure maintaining structure of the rotary vane vacuum pump, an annular groove for placing the sealing ring is formed in the outer side wall of the annular retaining shoulder, and the outer side wall of the sealing ring is pressed on the inner wall of the flow guiding hole.
In the rotary vane vacuum pump pressure maintaining structure, one side of the annular cushion block, which is close to the electromagnetic coil, is provided with a circle of convex columns, the electromagnetic coil is provided with clamping holes matched with the convex columns, the convex columns and the clamping holes are the same in number and correspond to each other in position one by one, and each convex column is clamped in the corresponding clamping hole. The convex columns are matched with the clamping holes so as to further limit the electromagnetic coil in the circumferential direction and ensure the stable operation of the electromagnetic coil.
In the pressure maintaining structure of the rotary vane vacuum pump, the upper end of the air inlet hole is internally provided with the internal thread.
Compared with the prior art, the rotary vane vacuum pump pressure maintaining structure has the following advantages:
1. The air flow channel middle part is the level and runs through the setting, and vacuum gauge and control assembly set up respectively at air flow channel middle part both ends, can effectively shorten the distance between vacuum gauge and the control assembly, make pressurize structure overall structure compacter, reduce space occupation.
2. The valve rod forms the seal through pipe and sealing washer cooperation and water conservancy diversion hole inner wall to change dynamic seal into quiet seal, prolong the sealed duration that forms between valve rod and the water conservancy diversion hole, improve this pressurize structure's life-span.
Drawings
Fig. 1 is a schematic perspective view of a vacuum pump.
Fig. 2 is a schematic cross-sectional structure of a vacuum pump.
Fig. 3 is an enlarged schematic view of the structure at a in fig. 2.
In the figure, 1, a bracket; 1a, an air inlet runner; 2. a support block; 2a, an air inlet hole; 2b, exhaust holes; 2c, a diversion channel; 2c1, a diversion hole; 2c2, a detection hole; 2d, sealing rings; 3. a vacuum gauge; 4. a valve stem; 4a, passing through the air hole; 4b, a limiting seat; 5. an electromagnetic coil; 6. a spring; 7. a conduit; 7a, an annular shoulder; 8. a seal ring; 9. an annular cushion block; 9a, convex columns; 10. and (5) plastic press caps.
Detailed Description
The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.
Example 1
As shown in fig. 1 and 2, the vacuum pump includes a bracket 1 having an intake runner 1a provided therein, and an inlet of the intake runner 1a is provided on a top wall of the bracket 1.
As shown in fig. 1 to 3, the present rotary vane vacuum pump pressure maintaining structure includes a support block 2 fixed on the top wall of a bracket 1 and a vacuum gauge 3 provided at one side of the support block 2. Wherein, the support block 2 is internally formed with a strip-shaped airflow channel, two ends of the airflow channel are respectively provided with an air inlet hole 2a and an air outlet hole 2b, the middle part of the airflow channel is a horizontally penetrating diversion channel 2c, two ends of the diversion channel 2c are respectively provided with a diversion hole 2c1 and a detection hole 2c2, and the air inlet hole 2a is communicated with the middle part of the diversion channel 2 c. The installation mode of the vacuum gauge 3 is existing and is not described in detail herein; two ends of the exhaust hole 2b are respectively communicated with the diversion hole 2c1 and the inlet of the air inlet runner 1 a; the guide hole 2c1 is provided with a control component for controlling the on-off of the air inlet hole 2a and the air outlet hole 2 b. The air current passageway middle part is the level and runs through the setting, and vacuum table 3 and control assembly set up respectively at air current passageway middle part both ends, can effectively shorten the distance between vacuum table 3 and the control assembly, makes pressurize structure overall structure compacter, reduces the space and occupies.
In actual products, the block forms a seal with the bracket 1 by using the annular sealing gasket, so as to ensure that the exhaust hole 2b is stably communicated with the inlet of the air inlet flow channel 1 a.
In the present embodiment of the present invention, in the present embodiment,
The control assembly structure is specifically as follows: the inner wall of the diversion channel 2c is coaxially provided with a sealing ring 2d, and the middle part of the diversion channel 2c is communicated with the diversion hole 2c1 by the sealing ring 2 d. The control assembly comprises a valve rod 4 horizontally arranged in the diversion hole 2c1 in a sliding way and a driving piece fixed outside the supporting block 2. The side wall of the valve rod 4 and the inner wall of the diversion hole 2c1 form a seal, the outer end of the valve rod 4 extends out of the diversion hole 2c1 and is connected with a driving piece, the driving piece is used for pushing the valve rod 4 to axially reciprocate and translate along the diversion channel 2c, and under the action of the driving piece, the valve rod 4 can be tightly pressed on the end face of the sealing ring 2d to seal the end face of the sealing ring 2d, so that the air inlet hole 2a and the air outlet hole 2b are isolated. The valve rod 4 is partially accommodated in the diversion hole 2c1, so that the distance between the control assembly and the vacuum gauge 3 can be shortened under the condition that the normal flow of gas is not influenced, and the whole structure is more compact.
The driving piece has the following structure: as shown in fig. 2 and 3, the driving member includes a hollow electromagnetic coil 5, and the electromagnetic coil 5 is a conventional product and is available on the market, and the specific structure thereof can be referred to as a conventional electromagnetic valve structure. The valve rod 4 is made of magnetic conductive materials, and the outer end of the valve rod 4 is inserted into an inner hole of the electromagnetic coil 5; the inner end of the valve rod 4 is sleeved with a spring 6 which enables the valve rod 4 to have inward movement trend. The electromagnetic coil 5 is powered on and powered off to control the valve rod 4 to move, and the valve rod has the advantages of being simple in structure, stable in work and the like.
The valve rod 4 and the diversion hole 2c1 are sealed as follows: a conduit 7 made of non-magnetic conductive materials is horizontally and fixedly arranged in the electromagnetic coil 5, the inner end of the conduit 7 extends into the diversion hole 2c1, and the outer wall of the conduit 7 is sealed with the inner wall of the diversion hole 2c1 through a sealing ring 8; the inner end and the outer end of the guide pipe 7 are respectively opened and closed, the shape and the size of the inner hole of the guide pipe 7 are matched with those of the valve rod 4, and the outer end of the valve rod 4 is inserted into the guide pipe 7. The valve rod 4 is matched with the inner wall of the diversion hole 2c1 through the guide pipe 7 and the sealing ring 8 to form a seal, so that dynamic seal is converted into static seal, the sealing duration formed between the valve rod 4 and the diversion hole 2c1 is prolonged, and the service life of the pressure maintaining structure is prolonged. Further, the outer side wall of the valve rod 4 is axially provided with a gas passing hole 4a in a penetrating manner, so that the valve rod 4 is prevented from moving normally when the gas is blocked in the guide pipe 7. Preferably, two gas passing holes 4a are provided and are symmetrically arranged along the center of the valve rod 4.
The spring 6 is mounted as follows: an annular limiting seat 4b is coaxially formed on the outer wall of the inner end of the valve rod 4, and two ends of a spring 6 respectively act on the inner end face of the guide pipe 7 and the limiting seat 4 b.
The catheter 7 is installed as follows: an annular cushion block 9 is clamped between the electromagnetic coil 5 and the supporting block 2, and the annular cushion block 9 is sleeved on the guide pipe 7 and fixedly connected with the supporting block 2; the outer end of the guide pipe 7 extends out of the electromagnetic coil 5 and is in threaded connection with a plastic pressing cap 10, and the plastic pressing cap 10 is tightly pressed on the electromagnetic coil 5; an annular shoulder 7a is formed on the outer wall of the inner end of the guide pipe 7, and the annular shoulder 7a is tightly pressed on the annular cushion block 9. Under the cooperation of the annular cushion block 9 and the plastic press cap 10, the electromagnetic coil 5 and the guide pipe 7 are synchronously positioned, and the assembly is convenient.
In actual products, the annular cushion block 9 is fixedly connected with the supporting block 2 through screws.
Further, a circle of protruding columns 9a are formed on one side, close to the electromagnetic coil 5, of the annular cushion block 9, clamping holes matched with the protruding columns 9a are formed in the electromagnetic coil 5, the protruding columns 9a and the clamping holes are identical in number and correspond to each other in position one by one, and each protruding column 9a is clamped in the corresponding clamping hole. The convex column 9a is matched with the clamping hole to further limit the electromagnetic coil 5 in the circumferential direction, so that stable operation of the electromagnetic coil 5 is ensured.
The seal ring 8 is installed as follows: an annular groove for placing the sealing ring 8 is formed in the outer side wall of the annular blocking shoulder 7a, and the outer side wall of the sealing ring 8 is pressed on the inner wall of the diversion hole 2c 1.
As shown in fig. 2, the upper end of the air inlet hole 2a is internally provided with internal threads, and in an actual product, the upper end of the air inlet hole 2a is screwed with an air inlet nozzle, so that the vacuum pumping component can be conveniently connected.
Example two
The structure and principle of the second embodiment are basically the same as those of the first embodiment, except that: the driving piece comprises a miniature electric push rod, and a main shaft of the miniature electric push rod is fixedly connected with the outer end of the valve rod 4.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. The rotary vane vacuum pump pressure maintaining structure is characterized in that the pressure maintaining structure comprises a supporting block (2) fixed on the top wall of the support (1) and a vacuum gauge (3) arranged on one side of the supporting block (2), a strip-shaped air flow channel is formed in the supporting block (2), and two ends of the air flow channel are respectively provided with an air inlet hole (2 a) and an air outlet hole (2 b); the middle part of the air flow channel is a diversion channel (2 c) which is horizontally penetrated, two ends of the diversion channel (2 c) are respectively provided with a diversion hole (2 c 1) and a detection hole (2 c 2) for connecting a vacuum gauge (3), an air inlet hole (2 a) is communicated with the middle part of the diversion channel (2 c), and two ends of an air outlet hole (2 b) are respectively communicated with the diversion hole (2 c 1) and an inlet of an air inlet flow channel (1 a); the guide hole (2 c 1) is provided with a control component for controlling the on-off of the air inlet hole (2 a) and the air outlet hole (2 b).
2. The rotary vane vacuum pump pressure maintaining structure according to claim 1, characterized in that a sealing ring (2 d) is coaxially formed on the inner wall of the diversion channel (2 c), and the middle part of the diversion channel (2 c) is communicated with the diversion hole (2 c 1) by the sealing ring (2 d); the control assembly comprises a valve rod (4) horizontally arranged in the diversion hole (2 c 1) in a sliding mode and a driving piece fixed outside the supporting block (2), sealing is formed between the side wall of the valve rod (4) and the inner wall of the diversion hole (2 c 1), the outer end of the valve rod (4) extends out of the diversion hole (2 c 1) and is connected with the driving piece, the driving piece is used for pushing the valve rod (4) to axially reciprocate and translate along the diversion channel (2 c), and the valve rod (4) can be tightly pressed on the end face of the sealing ring (2 d) to seal the port of the sealing ring (2 d).
3. The rotary vane vacuum pump pressure maintaining structure according to claim 2, wherein the driving member comprises a hollow electromagnetic coil (5), the valve rod (4) is made of magnetic conductive material, and the outer end of the valve rod (4) is inserted into an inner hole of the electromagnetic coil (5); the inner end of the valve rod (4) is sleeved with a spring (6) which enables the valve rod (4) to have inward movement trend.
4. The rotary vane vacuum pump pressure maintaining structure according to claim 3, characterized in that a conduit (7) made of non-magnetic conductive material is horizontally and fixedly arranged in the electromagnetic coil (5), the inner end of the conduit (7) extends into the diversion hole (2 c 1), and the outer wall of the conduit (7) forms a seal with the inner wall of the diversion hole (2 c 1) through a sealing ring (8); the inner end and the outer end of the guide pipe (7) are respectively in an open shape and a closed shape, the shape and the size of the inner hole of the guide pipe (7) are matched with those of the valve rod (4), and the outer end of the valve rod (4) is inserted into the guide pipe (7).
5. The pressure maintaining structure of the rotary vane vacuum pump according to claim 4, wherein the outer side wall of the valve rod (4) is provided with an air passing hole (4 a) in an axial penetrating manner.
6. The pressure maintaining structure of rotary vane vacuum pump as claimed in claim 5, characterized in that the inner end outer wall of the valve rod (4) is coaxially formed with an annular limiting seat (4 b), and two ends of the spring (6) respectively act on the inner end face of the guide pipe (7) and the limiting seat (4 b).
7. The rotary vane vacuum pump pressure maintaining structure according to claim 4, 5 or 6, characterized in that an annular cushion block (9) is clamped between the electromagnetic coil (5) and the supporting block (2), and the annular cushion block (9) is sleeved on the guide pipe (7) and fixedly connected with the supporting block (2); the outer end of the guide pipe (7) extends out of the electromagnetic coil (5) and is in threaded connection with a plastic pressing cap (10), and the plastic pressing cap (10) is tightly pressed on the electromagnetic coil (5); an annular blocking shoulder (7 a) is formed on the outer wall of the inner end of the guide pipe (7), and the annular blocking shoulder (7 a) is tightly pressed on the annular cushion block (9).
8. The rotary vane vacuum pump pressure maintaining structure according to claim 7, characterized in that an annular groove for placing the sealing ring (8) is formed in the outer side wall of the annular retaining shoulder (7 a), and the outer side wall of the sealing ring (8) is pressed on the inner wall of the diversion hole (2 c 1).
9. The rotary vane vacuum pump pressure maintaining structure according to claim 7, characterized in that a circle of convex columns (9 a) are formed on one side, close to the electromagnetic coil (5), of the annular cushion block (9), clamping holes matched with the convex columns (9 a) are formed in the electromagnetic coil (5), the convex columns (9 a) are the same in number and correspond to the clamping holes in one-to-one mode, and each convex column (9 a) is clamped in the corresponding clamping hole.
10. The rotary vane vacuum pump pressure maintaining structure according to claim 1, characterized in that the upper end of the air inlet hole (2 a) is internally provided with internal threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322616338.7U CN220910002U (en) | 2023-09-26 | 2023-09-26 | Pressure maintaining structure of rotary vane vacuum pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322616338.7U CN220910002U (en) | 2023-09-26 | 2023-09-26 | Pressure maintaining structure of rotary vane vacuum pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220910002U true CN220910002U (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322616338.7U Active CN220910002U (en) | 2023-09-26 | 2023-09-26 | Pressure maintaining structure of rotary vane vacuum pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220910002U (en) |
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2023
- 2023-09-26 CN CN202322616338.7U patent/CN220910002U/en active Active
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