CN216198997U

CN216198997U - Sliding valve vacuum pump

Info

Publication number: CN216198997U
Application number: CN202122506080.6U
Authority: CN
Inventors: 何敏剑; 高仙华; 王国民
Original assignee: Zhejiang Fangyuanlixin Vacuum Equipment Co ltd
Current assignee: Zhejiang Fangyuanlixin Vacuum Equipment Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-04-05
Anticipated expiration: 2031-10-18

Abstract

The utility model provides a slide valve vacuum pump, and belongs to the technical field of vacuum pumps. It is relatively poor to oil gas filter effect, and the oil-gas separation effect is relatively poor, uses inconvenient problem to the filter screen of current oil mist filter core. This slide valve vacuum pump, the pump body that has the pump chamber including inside, be provided with discharge valve on the pump chamber, set up the gas vent on the relative lateral wall of the pump body, this gas vent department can dismantle and link firmly the oil gas filter, be provided with the reduction gears that flows between discharge valve and the oil gas filter, the upper end of the outer wall including the pump chamber has exhaust oil sump and the buffering oil sump that sets up, discharge valve is vertical assembly on the pump chamber wall in the exhaust oil sump, this discharge valve soaks and is used for the soaking fender position that oil gas flows in the fluid in the exhaust oil sump, be provided with fender position device on the inner wall of the pump body between exhaust oil sump and the buffering oil sump. The utility model can improve the separation and filtration effect of oil gas, and has the advantages of good structural stability, convenient production and manufacture and convenient use.

Description

Sliding valve vacuum pump

Technical Field

The utility model belongs to the technical field of vacuum pumps, and relates to a slide valve vacuum pump.

Background

The slide valve vacuum pump is a slide valve type oil seal mechanical pump for short, is a variable-capacity gas transmission pump, and has the advantages of remarkable energy-saving effect, high vacuum degree, large air suction amount in a high vacuum region and the like.

The existing slide valve vacuum pump in the market has a structure with built-in oil gas filtration, such as the structure disclosed in Chinese patent numbers: the "201820498435.7" authorization notice number is: CN208057410U discloses a slide valve vacuum pump, which comprises a pump body, wherein a tank body for storing oil is arranged on the pump body, an oil-gas separator is arranged in the tank body, an air outlet channel of the pump body is communicated with the oil-gas separator, the tank body is provided with a partition plate, the partition plate divides the tank body into an upper chamber and a lower chamber, the partition plate is provided with a communication hole, the upper chamber is provided with an air outlet and is internally provided with an oil mist filter element, the oil mist filter element is distributed on the communication hole, and the oil-gas separator is arranged in the lower chamber; the oil-gas separator comprises an air inlet cover with a downward air inlet, an air outlet is arranged in the lateral direction of the air inlet cover, an oil baffle plate is installed at the top of the air inlet cover, the oil baffle plate and the air inlet cover divide a lower chamber into a left chamber and a right chamber, the air outlet is arranged on the side of the left chamber, communication holes are distributed on the side of the right chamber, and airflow channels for communicating the left chamber and the right chamber are formed between the inner walls of the box body on the two sides of the air inlet cover.

In foretell structure, set up the baffle in this pump body, separate the upper plenum chamber through the baffle, lower plenum chamber, oil and gas separator sets up cavity under, oil and gas separator mainly comprises the cover that admits air, the cover that admits air sets up the top of the discharge valve of the pump chamber in the pump body, although this admit air cover can hinder the effect that flows to the oil gas of the pump chamber in the pump body, but this admit air the cover to produce the speed of oil gas circulation and hinder slow effect limited, make most oil gas get into the oil mist filter core of upper plenum chamber, this oil mist filter core is tube-shape formula individual layer filter core, the oil gas that gets into in the oil mist filter core is more, the filter screen in the oil mist filter core is blockked up easily to this oil gas, it is relatively poor to the oil gas filter effect to cause the filter screen of oil mist filter core, the oil-gas separation effect is relatively poor, it is inconvenient to use.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides the slide valve vacuum pump which is simple in structure, good in oil-gas interference resistance effect in a pump body and obvious in oil-gas separation and oil-gas filtering effects.

The purpose of the utility model can be realized by the following technical scheme: a slide valve vacuum pump comprises a pump body with a pump cavity inside, wherein an exhaust valve is arranged on the pump cavity, an exhaust port is arranged on the opposite side wall of the pump body far away from the exhaust valve, and an oil-gas filter is detachably and fixedly connected at the exhaust port; the upper end that flows reduction gears include the outer wall of pump chamber have the exhaust oil sump that sets up and the buffering oil sump adjacent with the exhaust oil sump, discharge valve be vertical assembly on the pump chamber wall in the exhaust oil sump, this discharge valve soaks and is used for soaking that oil gas flows in the fluid in the exhaust oil sump to keep off the position, the inner wall of the pump body between exhaust oil sump and the buffering oil sump on be provided with and keep off position oil gas flow direction buffering oil sump, carry out fluid absorbing fender position device through the oil level of buffering oil sump.

The main structure of the slide valve vacuum pump is as follows: an oil gas filter is arranged inside; before oil gas in the pump body enters the oil gas filter, a structure for blocking the flow speed of the oil gas in multiple ways is arranged, and an oil baffle device and a buffer baffle device are arranged; the flow speed of the oil gas passing through the oil baffle device and the buffer gear device is greatly reduced, and the oil gas enters the oil gas filter for separation and filtration, so that the optimal separation and filtration effects can be achieved; the oil-gas filtering effect is better, the oil-gas separation effect is better, and the use is convenient. The structural design key points of the oil baffle device are that the exhaust valve is soaked in oil liquid in the exhaust oil tank, the oil is used as a sealing medium, a certain liquid level height is formed in the exhaust oil tank, and oil pressure is generated to provide pretightening force for the exhaust valve so as to ensure the sealing effect; meanwhile, the reaction speed of the exhaust valve is influenced, and the oil gas is discharged in an overflow mode, so that the flowing speed of the oil gas can be effectively reduced.

In foretell slide valve vacuum pump, fender position device including being the baffle of vertical setting, exhaust oil sump and buffering oil sump between separate through vertical baffle, the baffle set firmly on the pump body of the top in buffering oil sump, this baffle stretches into buffering oil sump downwards and separates buffering oil sump left and right, the outer wall in buffering oil sump on have the overflow hole that is the level setting, the level of the setting in this overflow hole is less than the level of the lower limb of baffle, exhaust oil sump and buffering oil sump between be provided with on the pump body and be used for fluid to filter and support by the buffer who flows back to buffering oil sump with oil gas. The small distance between the two walls of the exhaust oil pool is used for guiding oil gas exhausted by the exhaust valve moving in the horizontal direction to exhaust upwards vertically, so that the oil gas is concentrated at a part right above the exhaust oil pool, the oil liquid reflux rate of the exhaust oil pool is increased, and the oil level of the exhaust oil pool is ensured when the exhaust oil pool is in balance; the exhaust oil pool is used for ensuring the height of oil liquid and generating proper oil pressure; the buffer oil pool ensures that oil generates a buffer effect, ensures that the oil level does not exceed the standard, avoids increasing the exhaust flow resistance of oil gas, and utilizes the viscosity of the oil liquid to adsorb partial oil mist and oil smoke in the exhaust airflow contacting with the liquid surface of the buffer oil pool.

In foretell slide valve vacuum pump, buffering fender position device including being the buffering filter plate that the level was placed, the pump wall of the upper end of the pump body on have with exhaust oil sump dead against the opening position, the outer wall of the upper end of the pump body on can dismantle and link firmly the filter screen bedplate that closes the opening position, buffering filter plate assemble in filter screen bedplate on, should cushion filter plate and filter screen bedplate upper and lower interval cooperation. The installation boss that has interval distribution on the inner wall of this filter screen bedplate, the buffering filter screen board be horizontal state assemble on the installation boss of filter screen bedplate and with filter screen bedplate upper and lower interval formation oil gas impact's buffer space, when air current striking top buffering filter screen, can effectively increase the throughput of fluid to form the passageway of fluid to pump body lateral wall fast dispersion, make the fluid that appears flow back along pump body lateral wall internal surface, avoid making the fluid that appears wrapped up in by exhaust oil gas again because of the backward flow untimely often.

In the slide valve vacuum pump, the opening position extends towards the upper part of the buffer oil pool, the baffle is fixedly connected with the extending edge of the opening position on the pump wall of the pump body, and the baffle and the buffer filter screen plate form a right-angle return area so that oil gas is abutted against and flows back to the buffer oil pool in the right-angle return area. The liquid level of the buffer oil pool is higher at the left and lower at the right under the action of oil-gas airflow, the larger the oil-gas airflow is, the larger the liquid level on the right side of the buffer oil pool is reduced, and the larger the area of a ventilation flow channel above the buffer oil pool is increased; simultaneously, the liquid level of the buffer oil pool is arc-shaped, the liquid level buffer action angle of the buffer oil pool is enlarged, and the liquid level buffer action distance is enlarged.

In the above-described slide valve vacuum pump, the partition plate has, at an upper end thereof, an inclined plate for guiding the flow of the oil gas discharged from the discharge valve, the inclined plate being inclined in a direction away from the buffer oil sump. The left side wall of the exhaust oil pool is additionally provided with the inclined plate, so that the movement direction of the oil-gas airflow on the left side can be guided to be unparallel to the rest part, the oil-gas airflow can generate mutual interference above the exhaust oil pool, and the energy of the oil-gas airflow part can be weakened in advance; meanwhile, the exhaust airflow can be further compressed to impact the top buffering filter screen, and the inclined plate is lower than the left side wall, so that the backflow rate of the exhaust oil pool is ensured.

In the slide valve vacuum pump, the pump cavity and one side in the pump body form a main oil pool, and the oil-gas filter is positioned above the main oil pool. The main oil pool ensures the oil quantity in the oil pool, prolongs the circulation period of the lubricating oil, improves the cooling effect and avoids the oil temperature from rising.

In the slide valve vacuum pump, the exhaust port of the pump body above the main oil pool is provided with a rectangular assembly cavity, the oil-gas filter is detachably and fixedly connected in the rectangular assembly cavity, the cavity wall of the rectangular assembly cavity and the pool wall of the buffer oil pool provided with the overflow hole form a guide channel, and the buffer oil pool is communicated with the main oil pool through the guide channel. The purpose of the arrangement is to enable part of discharged oil gas flow to impact the oil liquid level of the main oil pool through the guide channel, so that the flow speed of oil gas is reduced; and the other part of discharged oil-gas airflow enters an oil-gas filter for oil-gas separation.

In a foretell slide valve vacuum pump, oil gas filter include that connecting plate and a plurality of are the filter core of the cylinder-shape of rectangle display distribution, the upper end of every filter core all sets firmly the connecting plate on, the lower extreme of every filter core is provided with the cartridge filter respectively, the same axial distribution of filter core and the cartridge filter that corresponds. The oil gas that flows back to each filter element has less oil mist content, generally is the oil smoke, and a small amount of oil mist can pass through the filter element and filter again, discharges through the gas vent after filtering.

In foretell a sliding valve vacuum pump, the external diameter of cartridge filter be less than the external diameter of filter core, this cartridge filter and filter core form the axial step, the outer wall of cartridge filter on the equipartition have with the cross discharge orifice of filter core intercommunication. The purpose of setting up like this is that make things convenient for oil gas to get into the filter core from the discharge orifice of cartridge filter and carry out oil gas filtration, convenient to use.

In the above-mentioned slide valve vacuum pump, the chamber bottom of the rectangular assembly chamber is provided with a plurality of assembly holes in a display distribution, the orifice of each assembly hole is provided with an annular assembly step protruding upwards, each assembly step is distributed at intervals to form an oil discharge groove at the chamber bottom of the rectangular assembly chamber, a check valve is arranged in the middle of the oil discharge groove at the chamber bottom of the rectangular assembly chamber, the oil discharge groove at the chamber bottom of the rectangular assembly chamber is communicated with the main oil pool through the check valve, the filter cartridges are correspondingly arranged in the corresponding assembly holes in a penetrating manner, the filter cartridges and the filter cartridges form axial steps and are oppositely clamped with the assembly steps, and the exhaust port is positioned on the outer wall of the rectangular assembly chamber. The purpose of setting up like this makes the fluid of remaining in the oil extraction groove of the chamber bottom of rectangle assembly chamber can flow back to in the main oil sump through the check valve, convenient to use.

Compared with the prior art, the slide valve vacuum pump has the advantages that: structural design is reasonable, simple, can effectively reduce the flow velocity of oil gas in the pump body, enables oil gas to obtain abundant filtration in the pump body, can improve the separation and the filterable effect of oil gas, and structural stability is good, and the production is made conveniently, convenient to use.

Drawings

FIG. 1 is a schematic sectional view of the vacuum pump section of the present slide valve.

In the figure, 1, pump chamber; 2. a pump body; 3. an exhaust valve; 4. an exhaust port; 5. an exhaust oil sump; 6. a buffer oil pool; 7. a baffle plate; 8. a partition plate; 9. an overflow aperture; 10. buffering the filter screen plate; 11. a screen base plate; 12. an inclined plate; 13. a main oil sump; 14. a guide channel; 15. a connecting plate; 16. a filter element; 17. a filter cartridge; 18. an overflowing hole; 19. an oil discharge groove; 20. a one-way valve.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, the slide valve vacuum pump mainly comprises a pump body 2 with a pump cavity 1 inside, wherein an exhaust valve 3 is arranged on the pump cavity 1, an exhaust port 4 is arranged on the opposite side wall of the pump body 2 far away from the exhaust valve 3, an oil-gas filter is detachably and fixedly connected at the exhaust port 4, and a flow speed reducing mechanism for reducing the flow speed of oil gas discharged by the exhaust valve 3 is arranged between the exhaust valve 3 and the oil-gas filter; in actual manufacturing, the flow decelerating mechanism is specifically implemented as follows: the oil-gas absorption pump mainly comprises an exhaust oil pool 5 arranged upwards and a buffer oil pool 6 adjacent to the exhaust oil pool 5 at the upper end of the outer wall of a pump cavity 1, wherein an exhaust valve 3 is vertically assembled on the wall of the pump cavity 1 in the exhaust oil pool 5, the exhaust valve 3 is soaked in oil in the exhaust oil pool 5 and is used for a soaking gear for oil-gas flowing, and a gear device for enabling the oil-gas gear to flow to the buffer oil pool 6 and absorbing the oil through the oil surface of the buffer oil pool 6 is arranged on the inner wall of a pump body 2 between the exhaust oil pool 5 and the buffer oil pool 6; in actual manufacturing, the specific implementation mode of the gear device is as follows: the device mainly comprises baffle plates 7 which are vertically arranged, an exhaust oil pool 5 and a buffer oil pool 6 are separated by a vertical partition plate 8, during actual design, the upper end of the partition plate 8 is provided with an inclined plate 12 for guiding the flow of oil gas exhausted by an exhaust valve 3, and the inclined plate 12 inclines towards the direction far away from the buffer oil pool 6; the top of the inclined plate 12 is lower than the partition plate 8; baffle 7 sets firmly on the pump body 2 of the top of buffering oil sump 6, and this baffle 7 stretches into in buffering oil sump 6 downwards and with buffering oil sump 6 left and right partition, has the overflow hole 9 that is the level setting on the outer wall of buffering oil sump 6, and the level of this overflow hole 9's setting is less than the level of the lower limb of baffle 7, is provided with on the pump body 2 between exhaust oil sump 5 and the buffering oil sump 6 to be used for fluid to filter and the oil gas supports to support the buffer that flows back to buffering oil sump 6.

During actual manufacturing, the specific implementation mode of the buffer gear device is as follows: the device mainly comprises a buffer filter screen plate 10 which is horizontally arranged, an opening position which is right opposite to the exhaust oil pool 5 is arranged on the pump wall at the upper end of the pump body 2, a filter screen seat plate 11 which seals the opening position is detachably and fixedly connected on the outer wall at the upper end of the pump body 2, the buffer filter screen plate 10 is assembled on the filter screen seat plate 11, and the buffer filter screen plate 10 and the filter screen seat plate 11 are matched at intervals up and down; the opening position extends towards the top of the buffer oil pool 6, the baffle 7 is fixedly connected with the extending edge of the opening position on the pump wall of the pump body 2, and the baffle 7 and the buffer filter screen plate 10 form a right-angle return area so that oil gas is abutted to return to the buffer oil pool 6 in the right-angle return area.

During actual manufacturing, a rectangular assembly cavity is arranged at the exhaust port 4 of the pump body 2 above the main oil pool 13, the oil-gas filter is detachably and fixedly connected in the rectangular assembly cavity, a guide channel 14 is formed by the cavity wall of the rectangular assembly cavity and the pool wall of the buffer oil pool 6 provided with the overflow hole 9, and the buffer oil pool 6 is communicated with the main oil pool 13 through the guide channel 14.

In practical application, the oil-gas filter comprises a connecting plate 15 and four cylindrical filter elements 16 which are arranged and distributed in a rectangular manner, the upper end of each filter element 16 is fixedly arranged on the connecting plate 15, the lower end of each filter element 16 is provided with a filter cylinder 17, and the filter elements 16 and the corresponding filter cylinders 17 are distributed in the same axial direction; the external diameter of cartridge filter 17 is less than the external diameter of filter core 16, and this cartridge filter 17 and filter core 16 form the axial step, and the equipartition has the discharge orifice 18 of crossing with filter core 16 intercommunication on the outer wall of cartridge filter 17.

During actual manufacturing, four assembly holes are distributed on the bottom of the rectangular assembly cavity in a display mode, an annular assembly step protruding upwards is arranged at the orifice of each assembly hole, the bottom of the rectangular assembly cavity is enabled to form an oil discharge groove 19 in a spaced mode through each assembly step, a one-way valve 20 is arranged in the middle of the oil discharge groove 19 in the bottom of the rectangular assembly cavity, the oil discharge groove 19 in the bottom of the rectangular assembly cavity is communicated with the main oil pool 13 through the one-way valve 20, the filter cartridges 17 are correspondingly arranged in the corresponding assembly holes in a penetrating mode one by one, the filter cartridges 17 and the filter cartridges 16 form axial steps and are oppositely clamped through the assembly steps, and the exhaust port 4 is located on the outer wall of the rectangular assembly cavity.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A slide valve vacuum pump comprises a pump body (2) with a pump cavity (1) inside, wherein an exhaust valve (3) is arranged on the pump cavity (1), an exhaust port (4) is arranged on the opposite side wall of the pump body (2) far away from the exhaust valve (3), and an oil-gas filter is detachably and fixedly connected at the exhaust port (4), and the slide valve vacuum pump is characterized in that a flow speed reducing mechanism for reducing the flow speed of oil gas discharged by the exhaust valve (3) is arranged between the exhaust valve (3) and the oil-gas filter; flow reduction gears include that the upper end of the outer wall of pump chamber (1) has exhaust oil pool (5) that set up and buffering oil pool (6) adjacent with exhaust oil pool (5), discharge valve (3) be vertical assembly on the pump chamber wall in exhaust oil pool (5), this discharge valve (3) soak and are used for the soaking that oil gas flows to keep off the position in the fluid of exhaust oil pool (5), the inner wall of the pump body (2) between exhaust oil pool (5) and buffering oil pool (6) on be provided with and keep off the position flow direction buffering oil pool (6) with oil gas, carry out the absorptive fender position device of fluid through the oil level of buffering oil pool (6).

2. A sliding valve vacuum pump according to claim 1, characterized in that the gear means comprise a vertically disposed baffle (7), the exhaust oil pool (5) and the buffer oil pool (6) are separated by a vertical clapboard (8), the baffle (7) is fixedly arranged on the pump body (2) above the buffer oil pool (6), the baffle (7) extends downwards into the buffer oil pool (6) and separates the buffer oil pool (6) from left and right, the outer wall of the buffer oil pool (6) is provided with an overflow hole (9) which is horizontally arranged, the level of the overflow hole (9) is lower than the level of the lower edge of the baffle (7), the pump body (2) between exhaust oil sump (5) and buffer oil sump (6) on be provided with and be used for fluid to filter and support with the oil gas and lean on the buffer who flows back to buffer oil sump (6).

3. A sliding valve vacuum pump according to claim 2, characterized in that the buffer device comprises a buffer filter screen plate (10) horizontally placed, the pump wall of the upper end of the pump body (2) is provided with an opening position facing the exhaust oil pool (5), the outer wall of the upper end of the pump body (2) is detachably and fixedly connected with a filter screen seat plate (11) for closing the opening position, the buffer filter screen plate (10) is assembled on the filter screen seat plate (11), and the buffer filter screen plate (10) and the filter screen seat plate (11) are matched at intervals up and down.

4. A slide valve vacuum pump according to claim 3, characterized in that the opening extends above the buffer reservoir (6), and the baffle (7) is attached to the pump wall of the pump body (2) at the edge of the opening, the baffle (7) and the buffer screen plate (10) forming a right-angle return area so that the oil and gas flows in the right-angle return area against the buffer reservoir (6).

5. A sliding valve vacuum pump according to claim 2 or 4, characterized in that the upper end of the partition (8) is provided with an inclined plate (12) for guiding the flow of oil and gas discharged from the discharge valve (3), which inclined plate (12) is inclined away from the buffer reservoir (6).

6. A slide valve vacuum pump according to claim 5, characterized in that the pump chamber (1) and one side in the pump body (2) form a main oil sump (13), and the oil and gas filter is located above the main oil sump (13).

7. A sliding valve vacuum pump according to claim 6, characterized in that a rectangular assembly chamber is arranged at the exhaust port (4) of the pump body (2) above the main oil pool (13), the oil-gas filter is detachably fixed in the rectangular assembly chamber, the wall of the rectangular assembly chamber and the pool wall of the buffer oil pool (6) provided with the overflow hole (9) form a guide channel (14), and the buffer oil pool (6) and the main oil pool (13) are communicated through the guide channel (14).

8. A sliding valve vacuum pump according to claim 7, characterized in that the oil and gas filter comprises a connecting plate (15) and a plurality of cylindrical filter elements (16) which are distributed in a rectangular array, the upper end of each filter element (16) is fixedly arranged on the connecting plate (15), the lower end of each filter element (16) is respectively provided with a filter cartridge (17), and the filter elements (16) and the corresponding filter cartridges (17) are distributed in the same axial direction.

9. A sliding valve vacuum pump according to claim 8, characterized in that the outer diameter of the filter cartridge (17) is smaller than the outer diameter of the filter element (16), the filter cartridge (17) and the filter element (16) form an axial step, and the outer wall of the filter cartridge (17) is uniformly provided with overflowing holes (18) communicated with the filter element (16).

10. A sliding valve vacuum pump according to claim 9, characterized in that a plurality of assembling holes are distributed on the bottom of the rectangular assembling cavity, the orifice of the assembling hole is provided with an annular assembling step protruding upwards, each assembling step is distributed at intervals to form an oil drain groove (19) on the bottom of the rectangular assembling cavity, a check valve (20) is arranged in the middle of the oil drain groove (19) on the bottom of the rectangular assembling cavity, the oil drain groove (19) on the bottom of the rectangular assembling cavity is communicated with the main oil pool (13) through the check valve (20), the filter cartridges (17) are correspondingly arranged in the corresponding assembling holes in a penetrating way, the filter cartridges (17) and the filter cartridges (16) form axial steps and are relatively clamped by the assembling steps, and the exhaust port (4) is positioned on the outer wall of the rectangular assembling cavity.