CN216198999U

CN216198999U - Built-in filter for slide valve vacuum pump

Info

Publication number: CN216198999U
Application number: CN202122519953.7U
Authority: CN
Inventors: 何敏剑; 王国民; 高仙华
Original assignee: Zhejiang Fangyuanlixin Vacuum Equipment Co ltd
Current assignee: Zhejiang Fangyuanlixin Vacuum Equipment Co ltd
Priority date: 2021-10-20
Filing date: 2021-10-20
Publication date: 2022-04-05
Anticipated expiration: 2031-10-20

Abstract

The utility model provides a built-in filter for a slide valve vacuum pump, and belongs to the technical field of vacuum pump filtering equipment. It is relatively poor to oil gas filter effect, the relatively poor problem of oil-gas separation effect that has solved the filter screen of current oil mist filter core. This built-in filter for slide valve vacuum pump sets up the gas outlet department at the pump body of slide valve vacuum pump and is used for the oil gas in the pump body to filter, and this built-in filter includes the connecting plate, is provided with a plurality of filter core on the connecting plate, corresponds respectively on every filter core to be provided with to be used for oil-gas separation and make the oil gas after the separation flow back to carry out filterable separator in the filter core that corresponds. The oil-gas separator has the advantages of reasonable and simple structural design, convenience in oil-gas separation and filtration, collision deceleration separation of oil and gas, good oil-gas separation and oil-gas filtration effects and convenience in use.

Description

Built-in filter for slide valve vacuum pump

Technical Field

The utility model belongs to the technical field of vacuum pump filtering equipment, and relates to a built-in filter for 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 a sliding valve vacuum pump which is simple in structure and obvious in oil gas filtering effect in a pump body.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a built-in filter that sliding valve vacuum pump was used, sets up in the gas vent department of the pump body of sliding valve vacuum pump and is used for the oil gas filtration in the pump body, its characterized in that, this built-in filter includes the connecting plate, the connecting plate on be provided with a plurality of filter core, correspond respectively on every filter core to be provided with and be used for oil-gas separation and make the oil gas after the separation flow back to carry out filterable separator in the filter core that corresponds.

The built-in filter for the sliding valve vacuum pump is mainly characterized in that a separating device for oil-gas separation is respectively arranged on each filter element, oil-gas can be effectively separated before being filtered by the filter elements through the separating devices, the separating effect is good, the integral filtering effect of the filter can be effectively improved, and the maintenance period of the filter elements is prolonged; meanwhile, the flow passage of the separation device is smooth, the exhaust pressure of the pump is not obviously influenced, and the increase of the running power of the slide valve vacuum pump is avoided.

In foretell built-in filter that sliding valve vacuum pump was used, separator include interior sleeve pipe and water conservancy diversion cover, interior sleeve pipe and the same axial assembly of filter core and these both axial intercommunication, the water conservancy diversion cover connect in interior sheathed tube outside and these both spaced apart cooperations form airflow channel with the mode that the axle center cover was established, the outer wall distribution of water conservancy diversion cover have with the relative air vent that communicates of airflow channel, oil gas carries out oil gas filtration through air vent, airflow channel and interior sleeve pipe backward flow to the filter core in. The purpose that sets up like this makes oil gas carry out collision separation many times including sleeve pipe and water conservancy diversion cover, can effectively improve oil-gas separation effect.

In the built-in filter for the sliding valve vacuum pump, the outer wall of the inner sleeve is sleeved with the first multilayer filter screen piece for oil-gas collision separation, and the vent holes distributed on the outer wall of the flow guide sleeve are opposite to the first multilayer filter screen piece. The multi-layer filter screen element I is formed by oppositely overlapping a plurality of cylindrical filter screens, and radially arranged bolts are distributed at intervals in the circumferential direction at the lower end of the multi-layer filter screen element I and are fixedly connected with the inner sleeve through the bolts; oil gas enters the multilayer filter screen element I on the outer wall of the inner straight flushing sleeve in the flow guide sleeve through the vent hole, and the oil gas is turned on the outer wall of the multilayer filter screen element I under the action of air pressure; most oil mist and oil smoke in the oil gas can contact with the cylindrical filter screen in the first multilayer filter screen piece, and part of the oil mist and the oil smoke in the oil gas rapidly drop after contacting with the cylindrical filter screen in the first multilayer filter screen piece, finally stay on the outer wall of the inner sleeve and finally flow to the inner bottom of the flow guide sleeve.

In the built-in filter for the sliding valve vacuum pump, the lower end of the guide sleeve is fixedly provided with a second multilayer filter screen component for oil-gas collision separation, the guide sleeve and the inner sleeve are matched at intervals to form an airflow channel and the second multilayer filter screen component is opposite to the second multilayer filter screen component, and a buffer device for oil-gas collision separation is arranged between the second multilayer filter screen component and the guide sleeve. The second multilayer filter screen component is formed by oppositely overlapping a plurality of circular filter screens, and a bolt is arranged in the middle of the second multilayer filter screen component in a penetrating way and is fixed on the bottom surface of the flow guide sleeve.

In the built-in filter for the sliding valve vacuum pump, the buffer device comprises a boss protruding upwards in the middle of the bottom surface of the flow guide sleeve, the second multilayer filter screen element is stacked on the boss and fixed on the boss through bolts, and a buffer gap for oil-gas collision exists between the second multilayer filter screen element and the bottom surface of the flow guide sleeve. During actual manufacturing, in order to improve the overflowing effect of the bottom surface of the flow guide sleeve, an oil return hole is formed in the bottom surface of the flow guide sleeve, during actual assembly, a bolt and a pressing plate are assembled and used at the same time, and the purpose that a buffer gap exists between the second multi-layer filter screen and the bottom surface of the flow guide sleeve is to separate oil in the second multi-layer filter screen and an indwelling flow guide sleeve, so that firstly, the failure of the second multi-layer filter screen after being soaked in the oil is avoided, secondly, the oil under the second multi-layer filter screen flows smoothly, and oil return is facilitated; the second multilayer filter screen piece is fixed on the boss through the pressing plate and the bolts, so that the center of the second multilayer filter screen piece is limited by the pressing plate and the boss, the outer edge of the second multilayer filter screen piece is free from constraint, the second multilayer filter screen piece is in an outer loose and inner tight state, the outer ring is loose, the distance between the filter screens is large, the mutual interference degree of the filter screens on different layers is shallow, and the downward oil gas on the outer ring can be favorably penetrated into the second multilayer filter screen piece; the inner ring is tight, the filter screens are almost overlapped, the filter screens on different layers are seriously interfered with each other, the medium cannot pass through the filter screens, the speed and the scale of the upward oil gas backflow of the inner ring can be effectively limited, the multi-layer oil gas filtering effect is improved, the upward air flow speed passing through the bottom oil return hole can be effectively limited, and the normal oil return of the oil return hole is ensured.

In the built-in filter for the sliding valve vacuum pump, the connecting plate is rectangular, four filter elements are arranged, the filter elements are distributed on the connecting plate in a rectangular array mode, the air outlet of the pump body is provided with a rectangular assembly cavity, assembly holes are distributed on the bottom of the rectangular assembly cavity in a rectangular array mode, annular assembly steps protruding upwards are arranged at the hole opening of each assembly hole, the bottom of the rectangular assembly cavity forms an oil discharge groove in a spaced mode, a one-way valve is arranged in the middle of the oil discharge groove in the bottom of the rectangular assembly cavity, the oil discharge groove in the bottom of the rectangular assembly cavity is communicated with a main oil pool arranged below the air outlet of the pump body through the one-way valve, and the flow guide sleeve and the inner sleeve are arranged in the assembly steps in a penetrating mode and located at the position below the rectangular assembly cavity. 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.

In the built-in filter for the sliding valve vacuum pump, the upper end edge of the guide sleeve is provided with the outward turning edge, the upper end edge of the inner sleeve is provided with the outward turning edge, the outward turning edge of the guide sleeve and the outward turning edge of the inner sleeve are axially stacked and pressed on the assembly step, and the filter element compresses the corresponding inner sleeve to axially assemble the filter element, the inner sleeve and the guide sleeve. The guide sleeve and the inner sleeve are matched with each other at intervals in the radial direction to form an airflow channel in an axial stacking and press-fitting mode through the outward-turning edge of the guide sleeve and the outward-turning of the inner sleeve on the assembly step, so that the structure stability is high, and the assembly is convenient.

In the built-in filter for the sliding valve vacuum pump, the pump body above the rectangular assembly cavity is provided with the cover plate, the cover plate is detachably and fixedly connected to the pump body through bolts, an annular sealing ring is arranged between the cover plate and the pump body, and the cover plate is in sealing fit with the pump body through the annular sealing ring. The purpose that sets up like this makes things convenient for oil gas filter to assemble, dismantle in rectangle assembly chamber, makes things convenient for oil gas filter's washing maintenance, convenient to use.

Compared with the prior art, the built-in filter for the slide valve vacuum pump has the advantages that: structural design is reasonable, simple, makes things convenient for the separation and the filtration of oil gas, and oil gas collides the separation of slowing down, and oil-gas separation and oil-gas filter effect are good, convenient to use.

Drawings

Fig. 1 is a schematic sectional view showing a built-in filter for the present slide valve vacuum pump.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic perspective view of the filter insert for the slide valve vacuum pump.

In the figure, 1, a pump body; 2. an exhaust port; 3. a connecting plate; 4. a filter element; 5. an inner sleeve; 6. a flow guide sleeve; 6a, an oil return hole; 7. an air flow channel; 8. a vent hole; 9. a first multilayer filter screen element; 10. a second multilayer filter screen element; 11. a boss; 111. assembling steps; 12. An oil discharge groove; 13. a one-way valve; 14. a main oil sump; 15. turning out the edges; 16. flanging outwards; 17. a cover plate; 18. an annular seal ring.

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, 2 and 3, the built-in filter for a sliding valve vacuum pump is arranged at an exhaust port 2 of a pump body 1 of the sliding valve vacuum pump and used for filtering oil gas in the pump body 1, the built-in filter comprises a connecting plate 3, four filter elements 4 are arranged on the connecting plate 3, and a separating device for separating oil gas and returning separated oil gas to the corresponding filter elements 4 for filtering is correspondingly arranged on each filter element 4; in actual manufacturing, the specific implementation mode of the separation device is as follows: mainly constitute by interior sleeve pipe 5 and water conservancy diversion cover 6, interior sleeve pipe 5 and the same axial assembly of filter core 4 and these both axial intercommunications, water conservancy diversion cover 6 is connected in the outside of interior sleeve pipe 5 and these both spaced apart from the cooperation and is formed airflow channel 7 with the mode that the axle center cover was established, and the outer wall distribution of water conservancy diversion cover 6 has the air vent 8 with airflow channel 7 relative intercommunication, and oil gas carries out the oil gas filtration through air vent 8, airflow channel 7 and interior sleeve pipe 5 backward flow to filter core 4 in.

The outer wall of the inner sleeve 5 is sleeved with a first multilayer filter screen component 9 for oil-gas collision separation, and vent holes 8 distributed on the outer wall of the flow guide sleeve 6 are opposite to the first multilayer filter screen component 9; the lower end of the flow guide sleeve 6 is fixedly provided with a second multilayer filter screen component 10 for oil-gas collision separation, the flow guide sleeve 6 and the inner sleeve 5 are matched at intervals to form an airflow channel 7 which is opposite to the second multilayer filter screen component 10, and a buffer device for oil-gas collision separation is arranged between the second multilayer filter screen component 10 and the flow guide sleeve 6; specifically, the specific implementation mode of the buffer device is as follows: a boss 11 which protrudes upwards is arranged in the middle of the bottom surface of the flow guide sleeve 6, a second multi-layer filter screen piece 10 is stacked on the boss 11 and fixed on the boss 11 through bolts, and a buffer gap for oil-gas collision exists between the second multi-layer filter screen piece 10 and the bottom surface of the flow guide sleeve 6; in actual manufacturing, in order to improve the overflowing effect of the bottom surface of the flow guide sleeve 6, an oil return hole 6a is formed in the bottom surface of the flow guide sleeve 6.

During actual manufacturing, the connecting plate 3 is rectangular, the filter elements 4 are distributed on the connecting plate 3 in a rectangular array, a rectangular assembly cavity is arranged at the exhaust port 2 of the pump body 1, assembly holes are distributed in a rectangular array at the cavity bottom of the rectangular assembly cavity, annular assembly steps 111 which are arranged in an upward protruding mode are arranged at the hole opening of each assembly hole, oil discharge grooves 12 are formed in the cavity bottom of the rectangular assembly cavity due to the interval distribution of each assembly step 111, a check valve 13 is arranged in the middle of each oil discharge groove 12 in the cavity bottom of the rectangular assembly cavity, each oil discharge groove 12 in the cavity bottom of the rectangular assembly cavity is communicated with a main oil pool 14 which is arranged below the exhaust port 2 of the pump body 1 through the check valve 13, and the flow guide sleeve 6 and the inner sleeve 5 are arranged in the assembly steps 111 in a penetrating mode and are located below the rectangular assembly cavity; during actual design, the upper end edge of the flow guide sleeve 6 is provided with an outward turning edge 15, the upper end edge of the inner sleeve 5 is provided with an outward turning edge 16, the outward turning edge 15 of the flow guide sleeve 6 and the outward turning edge 16 of the inner sleeve 5 are axially stacked and pressed on the assembly step 111, and the filter element 4 compresses the corresponding inner sleeve 5 to enable the filter element 4, the inner sleeve 5 and the flow guide sleeve 6 to be axially assembled; a cover plate 17 is arranged on the pump body 1 above the rectangular assembly cavity, the cover plate 17 is detachably and fixedly connected to the pump body 1 through bolts, an annular sealing ring 18 is arranged between the cover plate 17 and the pump body 1, and the cover plate 17 is in sealing fit with the pump body 1 through the annular sealing ring 18.

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. The utility model provides a built-in filter for slide valve vacuum pump, sets up gas vent (2) department and the oil gas that is used for in the pump body (1) of slide valve vacuum pump and filters, its characterized in that, this built-in filter includes connecting plate (3), connecting plate (3) on be provided with a plurality of filter core (4), correspond respectively on every filter core (4) and be provided with the oil-gas separation and make the oil gas after the separation flow back to and carry out filterable separator in the filter core (4) that corresponds.

2. The built-in filter for the sliding valve vacuum pump according to claim 1, characterized in that the separating device comprises an inner sleeve (5) and a flow guide sleeve (6), the inner sleeve (5) and the filter element (4) are assembled in the same axial direction and are communicated in the axial direction, the flow guide sleeve (6) is connected to the outer side of the inner sleeve (5) in a coaxial sleeve mode and is matched with the inner sleeve at intervals to form an air flow channel (7), vent holes (8) which are communicated with the air flow channel (7) relatively are distributed on the outer wall of the flow guide sleeve (6), and oil gas flows back to the filter element (4) through the vent holes (8), the air flow channel (7) and the inner sleeve (5) to be filtered.

3. The built-in filter for the sliding valve vacuum pump according to claim 2, characterized in that the outer wall of the inner sleeve (5) is sleeved with a first multi-layer filter screen element (9) for oil-gas collision separation, and the vent holes (8) distributed on the outer wall of the flow guide sleeve (6) are opposite to the first multi-layer filter screen element (9).

4. The built-in filter for the sliding valve vacuum pump according to claim 2 or 3, wherein a second multi-layer filter screen member (10) for oil-gas collision separation is fixedly arranged at the lower end of the flow guide sleeve (6), the flow guide sleeve (6) and the inner sleeve (5) are matched at intervals to form an air flow channel (7) which is opposite to the second multi-layer filter screen member (10), and a buffer device for oil-gas collision separation is arranged between the second multi-layer filter screen member (10) and the flow guide sleeve (6).

5. The built-in filter for a sliding valve vacuum pump according to claim 4, wherein the buffer device comprises a boss (11) protruding upwards at the middle position of the bottom surface of the flow guide sleeve (6), the second multi-layer filter screen member (10) is stacked on the boss (11) and fixed on the boss (11) by bolts, and a buffer gap for oil-gas collision exists between the second multi-layer filter screen member (10) and the bottom surface of the flow guide sleeve (6).

6. The built-in filter for a sliding valve vacuum pump according to claim 5, wherein the connecting plate (3) is rectangular, the number of the filter elements (4) is four, the filter elements (4) are distributed on the connecting plate (3) in a rectangular array, a rectangular assembly cavity is arranged at the exhaust port (2) of the pump body (1), assembly holes are distributed in a rectangular array at the cavity bottom of the rectangular assembly cavity, an orifice of each assembly hole is provided with an annular assembly step (111) which is convexly arranged, each assembly step (111) is distributed at intervals to enable the cavity bottom of the rectangular assembly cavity to form an oil discharge groove (12), a check valve (13) is arranged in the middle of the oil discharge groove (12) at the cavity bottom of the rectangular assembly cavity, the oil discharge groove (12) at the cavity bottom of the rectangular assembly cavity is communicated with the main oil pool (14) arranged below the exhaust port (2) of the pump body (1) through the check valve (13), the flow guide sleeve (6) and the inner sleeve (5) are arranged in the assembly step (111) in a penetrating manner and are positioned below the rectangular assembly cavity.

7. The built-in filter for a sliding valve vacuum pump according to claim 6, wherein the upper end edge of the guide sleeve (6) is provided with an outward turning edge (15), the upper end edge of the inner sleeve (5) is provided with an outward turning edge (16), the outward turning edge (15) of the guide sleeve (6) and the outward turning edge (16) of the inner sleeve (5) are axially stacked and pressed on the assembly step (111), and the filter element (4) presses the corresponding inner sleeve (5) to axially assemble the filter element (4), the inner sleeve (5) and the guide sleeve (6).

8. A built-in filter for a sliding valve vacuum pump according to claim 7, characterized in that a cover plate (17) is arranged on the pump body (1) above the rectangular assembly cavity, the cover plate (17) is detachably fixed on the pump body (1) through bolts, an annular sealing ring (18) is arranged between the cover plate (17) and the pump body (1), and the cover plate (17) is in sealing fit with the pump body (1) through the annular sealing ring (18).