CN114984670A

CN114984670A - Filter for slide valve pump

Info

Publication number: CN114984670A
Application number: CN202210777110.3A
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: 2022-07-03
Filing date: 2022-07-03
Publication date: 2022-09-02

Abstract

The invention provides a filter for a slide valve pump, and belongs to the technical field of matched equipment of the slide valve pump. The gas-liquid phase filter solves the problems that an existing filter is poor in gas-phase and liquid-phase separation effect and inconvenient to use. The filter for the sliding valve pump comprises a lower shell and an upper shell, wherein an air inlet pipeline is arranged on the lower shell, the air inlet pipeline extends into the lower shell and forms a liquid accumulation pool between the lower shell, an exhaust pipeline is arranged on the upper shell, the upper shell and the lower shell are oppositely connected to form a containing cavity for gas-liquid filtering separation, the air inlet pipeline and the exhaust pipeline are communicated through the containing cavity, a filter element is arranged on the air inlet pipeline in the containing cavity between the air inlet pipeline and the exhaust pipeline, a centrifugal guide device for annular flowing of airflow is arranged between the filter element and the lower shell, and a flow resistance guide device is further arranged between the filter element above the centrifugal guide device and the lower shell. The invention has the advantages of gas-liquid separation, good filtering effect, stable structure and convenient use, and can achieve the purpose of filtering.

Description

Filter for slide valve pump

Technical Field

The invention belongs to the technical field of slide valve pump corollary equipment, and relates to a filter for a slide valve pump.

Background

The slide valve pump has obvious energy-saving effect, high vacuum degree and large air extraction amount in a high vacuum interval, can be widely applied to vacuum impregnation and vacuum drying processes of transformers, wires and cables and capacitors in the power industry, and is vacuum equipment which is ideal in vacuum coating, vacuum smelting, vacuum heat treatment, vacuum oil filtering, freeze drying and aviation simulation tests; in the using process, gas is discharged from the exhaust hole of the slide valve pump, and the discharged gas contains dust-like small particle impurities and has pungent smell, so that the environment is polluted, and the environmental protection standard cannot be obtained.

Through retrieval, the existing filter assembled on a slide valve pump, such as Chinese patent numbers: "1821111726.2", the authorization notice number is: CN208632475U the degree of depth gas-liquid separation filter, its concrete structure is: comprises a base, a separating cylinder is fixedly connected to the inner wall of the base, a supporting plate and a partition plate are fixedly connected to the inner wall of the separating cylinder along the vertical direction at one time, a spiral guide plate is fixedly connected to the side wall of the partition plate, a threaded hole is formed in the upper surface of the separating cylinder, an outlet connector is connected to the threaded hole in a threaded fit manner, a filter element is movably sleeved on the lower surface of the outlet connector, the bottom end of the filter element is movably connected with the upper surface of the supporting plate, a clamping mechanism is fixedly arranged on the upper surface of the supporting plate, an air inlet connecting pipe is fixedly communicated with the side wall of the separating cylinder, a circular through hole is formed in the lower surface of the separating cylinder, a liquid discharge pipe is fixedly connected to the hole wall of the circular through hole, an electric valve is fixedly arranged on the inner wall of the liquid discharge pipe, a filter box is fixedly connected to one end of the liquid discharge pipe, which is far away from the separating cylinder, a filter screen plate is fixedly connected to the inner wall of the filter box, and a guide pipe is fixedly connected to one side of the filter box, which is far away from the liquid discharge pipe, rectangular through-hole has been seted up to the lower surface of rose box, and the pore wall swing joint of rectangular through-hole has seals the stopper, seals the equal fixedly connected with fixed block of lateral wall about the stopper, and the lower surface of two fixed blocks all sets up threaded hole, and threaded hole screw thread is joined in marriage the festival and is connected with the bolt, the lower surface of rose box set up with bolt assorted screw thread blind hole.

In the structure, the side wall of the partition board is fixedly provided with the spiral guide plate, the airflow carries out spiral motion along with the spiral guide plate, the airflow can carry out adsorption separation on the outer wall of the spiral guide plate and the inner wall of the separation cylinder, but the centrifugal separation effect of the airflow is poor, the airflow can quickly flow out from a gas phase outlet pipe of the cylindrical container along with the increase of the flow of the airflow, the separation effect of the gas phase and the liquid phase is poor, and the use is inconvenient; in a large exhaust section of a slide valve pump, pressure loss caused by the working of a common filter is large, oil in the filter is difficult to return to an oil tank of the slide valve pump, and even the phenomenon of backflow of the oil can occur.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides the filter for the slide valve pump, which has the advantages of simple structure, low cost, good gas-liquid separation effect of airflow and thorough separation.

The purpose of the invention can be realized by the following technical scheme: a filter for a sliding valve pump comprises a lower shell and an upper shell, wherein an air inlet pipeline is arranged on the lower shell, the air inlet pipeline extends into the lower shell and forms a liquid accumulation pool with the lower shell, an exhaust pipeline is arranged on the upper shell, the upper shell and the lower shell are oppositely connected to form a containing cavity for gas-liquid filtering separation, the air inlet pipeline is communicated with the exhaust pipeline through the containing cavity, and the filter is characterized in that a filter element is arranged on the air inlet pipeline in the containing cavity between the air inlet pipeline and the exhaust pipeline, a centrifugal guide device for annular flowing of airflow is arranged between the filter element and the lower shell, a flow resistance guide device for baffling flowing of the airflow is further arranged between the filter element above the centrifugal guide device and the lower shell, the airflow flows in through the air inlet pipeline, the annular centrifugal flowing of the airflow is enabled to flow through the centrifugal guide device, and the gas-liquid separation is formed by centrifugal force, liquid flows into the liquid accumulation pool, the residual airflow flows to the flow resistance guide device and collides with the airflow through the flow resistance guide device to form gas-liquid separation again, the liquid flows into the liquid accumulation pool, and the gas is discharged through the exhaust pipeline of the upper shell.

The filter for the sliding valve pump mainly weakens the energy of airflow through the centrifugal guide device and the flow resistance guide device, so that oil liquid carried by the airflow is less and less finally, the states of the oil liquid and the oil vapor in the airflow are changed through the centrifugal guide device and the flow resistance guide device, and the oil liquid and the oil vapor in the airflow cannot meet the requirement of being carried, so that the oil liquid and the oil vapor in the airflow are continuously separated out, and the purpose of filtering is achieved. The filter for the sliding valve pump is particularly used for a large exhaust section of the sliding valve pump, a flow passage is smooth, pressure loss is small, and oil return can be ensured; when the airflow passes through the centrifugal guide device, most of oil in the airflow is filtered by centrifugal separation; meanwhile, the annular air mass in the semi-closed space can extrude the liquid accumulation pool, the oil pressure difference between the liquid accumulation pool and the oil tank of the slide valve pump can be increased, and the oil return efficiency is improved.

In foretell filter for slide valve pump, the filter core of crossing include inner tube and the last inner tube that has circular apron down, the same axial interval distribution of last inner tube, lower inner tube, should go up the inner tube and link firmly with the upper end that the cover was equipped with outer tube and was gone up inner tube and outer tube between the inner tube down, the lower extreme of lower inner tube and outer tube links firmly, this outer tube and last inner tube, lower inner tube interval cooperation form airflow channel, the inner wall of lower inner tube lower extreme on be provided with the internal thread, the outer wall of admission line upper end on be provided with the external screw thread, the internal thread screwed connection of lower inner tube lower extreme on the external screw thread of admission line upper end. The same axial of inner tube and admission line is connected down, should go up the inner tube, the same axial interval distribution of inner tube down, make the air current from last inner tube, the axial interval department of inner tube flows down, it is under the effect of the same high-speed direct rush of air current to go up the inner tube, it forms the air current buffer zone in inner tube and the circular apron to go up, the air current buffer zone between inner tube and the circular apron should accumulates fluid gradually and forms the buffer oil pond, and finally form curved liquid level, the buffer oil pond can play good cushioning effect to the fluid in the air current, weaken the kinetic energy of fluid.

In the filter for the sliding valve pump, the centrifugal guide device comprises centrifugal channels which are uniformly distributed on the outer wall of the lower end part of the outer sleeve in the circumferential direction, and each centrifugal channel is arc-shaped and gradually increases towards the caliber of the outlet. The airflow is tangentially sprayed out from the centrifugal channel of the outer sleeve and constrained by the inner wall of the lower casing, and moves circularly along the inner wall of the lower casing along with the increasing of the airflow to form circular air mass. The larger the speed and the mass of the airflow are, the larger the centrifugal force applied to the airflow is, so that the speed of the airflow in the annular air mass is continuously reduced from outside to inside along the radial direction. After the exhaust airflow rushes out of the filter element and enters the annular air mass, the speed of the exhaust airflow is higher than that of the peripheral annular airflow, the exhaust airflow can continuously move outwards under the action of relatively high centrifugal force and finally move on the outermost side, and then the exhaust airflow is fused into the annular air mass; the liquid has larger mass, and moves at the outer side of the annular air mass, an oil film is formed on the inner wall of the lower shell, the thickness of the oil film is influenced by the displacement of the pump and is relatively stable, when the oil is continuously increased, the oil film can axially diffuse upwards and downwards along the two sides and upwards limited by the flow resistance guide device, and the oil can only spirally downwards flow into the liquid accumulation pool under the action of the annular air mass and the centrifugal force.

In foretell filter for slide valve pump, flow resistance guider include that outer annular plate one, outer annular plate two that the interval set up have along the axial direction of outer pipe cover on the outer wall of outer pipe cover, the outer wall of lower inner tube on be provided with annular bottom plate, the inner wall of lower casing on axial interval distribution have interior annular plate one, interior annular plate two, this outer annular plate one, outer annular plate two, annular bottom plate and interior annular plate one, two axial dislocation distributions of interior annular plate. The outer annular plate I, the outer annular plate II, the annular bottom plate, the inner annular plate I and the inner annular plate II form a labyrinth structure, so that airflow is forced to turn, the number of times of airflow collision is increased, the airflow at all positions can collide with the inner wall through which the airflow flows, the airflow separation effect is improved, the capture area during airflow separation is increased, the capture efficiency is improved, and in order to further improve the filtering effect, the pairing number of the outer annular plate and the inner annular plate can be increased according to the size of airflow; the outer diameters of the first outer annular plate and the second outer annular plate and the inner diameters of the first inner annular plate and the second inner annular plate are gradually reduced from top to bottom according to the installation positions, and the air flow deflection channel is ensured to be light-proof; the outer diameters of the first outer annular plate and the second outer annular plate and the first inner annular plate and the second inner annular plate need to have certain baffling depths (namely the outer diameters of the first outer annular plate and the second outer annular plate and the radial widths of the first inner annular plate and the second inner annular plate) so as to limit the motion strength of the wall-attached part of the airflow and avoid influencing the oil discharging efficiency of the outer pipe sleeve and the inner wall of the lower shell; during actual manufacturing, oil passing holes are uniformly distributed at intervals in the circumferential direction of inner edges of a first inner annular plate and a second inner annular plate which are axially distributed on the inner wall of the lower shell, the oil passing holes are used for discharging oil on the inner wall of the lower shell, an inclined baffle is further arranged below the second inner annular plate, the inclined baffle is inclined downwards along the air flow direction, and the purpose of setting is to avoid the contact of the lower oil holes on the second inner annular plate and an annular air mass and ensure the oil discharging effect on the inner wall of the lower shell.

In foretell filter for slide valve pump, centrifugal channel be located between annular bottom plate and the outer annular plate two, this centrifugal channel includes the axial cowl of circumference equipartition on outer pipe box lower tip outer wall, this axial cowl links firmly perpendicularly on annular bottom plate and the upper edge of axial cowl turns over perpendicularly and turns over the arc passageway that extends to outer pipe box outer wall and form between the outer pipe box, the inner chamber intercommunication of this arc passageway and outer pipe box, the outer wall of lower inner tube on still circumference interval distribution have an arc to keep off the position board, this arc keeps off the position board axial and separates under in inner tube, outer pipe box and make the following inner tube of arc passageway form spiral arc opening shape as the center. The axial arc-shaped baffle is used for guiding the flow direction of the air flow, so that the air flow can tangentially enter the annular air mass when being discharged from the outer sleeve, the adverse effect on the annular air mass is avoided, and meanwhile, the air flow can keep larger circumferential speed, thereby being beneficial to enhancing the gas-liquid separation effect of the annular air mass.

In foretell filter for slide valve pump, outer jacket outer wall between outer annular plate one, outer annular plate two on the circumference interval equipartition have and be the division board of radial setting, the top edge of this division board extends to outer annular plate one, the lower limb of this division board extends to outer annular plate two, the inward flange circumference interval equipartition of outer annular plate two have the oilhole of crossing. During actual design, the number of the oil passing holes corresponds to that of the partition plates, and the oil passing holes are correspondingly located below the partition plates.

The partition plate can limit the flow of air flow, so that oil liquid can be gathered conveniently, the oil is discharged in a centralized manner, and the oil discharging efficiency is improved; the partition plate can also reduce the speed of the air flow nearby, which is favorable for stabilizing the oil discharging effect; the upper edge of the partition plate extends to the first outer annular plate, and the lower edge of the partition plate extends to the second outer annular plate, so that the first outer annular plate and the second outer annular plate can be effectively prevented from being deformed by the impact of airflow.

In the filter for a slide valve pump, the upper pipe opening of the upper inner pipe is provided with a circular cover plate in sealing connection, the outer diameter of the circular cover plate is larger than that of the upper inner pipe, and the circular cover plate and the outer annular plate are axially matched at intervals to form an annular buffer concave position. The outer diameter of the circular cover plate is larger than that of the upper inner tube to form a tube cap top, so that when downward airflow in the upper shell passes above the outer annular plate I, the specific gravity of oil in the airflow is high, the direction of the oil is not easy to change, the oil is easy to impact and further deposits on the upper surface of the outer annular plate I, the oil can be prevented from gathering towards the center by protruding the upper inner tube of the outer annular plate I, the oil can be prevented from contacting with strong upward airflow, and the power for discharging the oil carried by the oil is eliminated; the circular cover plate forms a pipe cap brim (i.e. extends in a way of protruding towards the direction of airflow movement) so as to cut off the path of oil crawling upwards to the upper plane of the circular cover plate capable of contacting with the ascending airflow.

In foretell filter for slide valve pump, the outer wall of lower inner tube on circumference interval distribution have the lower oil pipe that is the axial setting, in each lower oil pipe's lower mouth of pipe extended to the hydrops pond, each lower oil pipe's upper mouth of pipe extended to outer annular plate one and with annular buffering concave position intercommunication. The purpose of this is to: firstly, oil can be accumulated below the outer annular plate, the buffering effect is improved, and the oil impact splashing is reduced; secondly, an oil pool is formed by oil liquid accumulation, and the local oil level and the oil pressure are improved by utilizing air flow impact, so that the oil discharging efficiency is ensured; the first outer annular plate has a certain protruding height, so that the cross section area of a peripheral annular channel can be obviously increased, the air flow speed is reduced, the entrainment capacity of air flow is reduced, the oil deposition efficiency is improved, the coverage rate of the circular cover plate can be increased according to actual conditions, and the oil deposition rate is further improved.

In the filter for the sliding valve pump, the plurality of half-menisci are alternately arranged in the exhaust pipeline along the left and right directions of the axis direction of the exhaust pipeline, the adjacent half-menisci are axially matched at intervals, the inner channel opening of the exhaust pipeline is also provided with an outward turning edge, and a rotary concave position is formed between the outward turning edge and the exhaust pipeline. A plurality of menisci are arranged in the exhaust pipeline and are used for airflow blocking, the rotary concave position can meet the requirement of airflow exhaust, and the effective cooling area can be obviously increased; utilize the collision of air current and meniscus, make the whole cooling effect of air current good, the air current can take place many times with exhaust duct's pipe wall and meniscus simultaneously and collide, and the fluid kinetic energy loss after the condensation is big, the number of times of contact is many, and very easy is caught to obtain better filter effect.

In the filter for the sliding valve pump, a first cooling cavity is arranged in the upper shell, a second cooling cavity is arranged on the exhaust pipeline in the upper shell, the first cooling cavity is communicated with the second cooling cavity, a water inlet connector and a water outlet connector are further arranged on the upper shell, and the water inlet connector and the water outlet connector are both communicated with the first cooling cavity. The oil content in the air flow on the exhaust pipeline of the upper shell is less, but the saturated steam rich in oil is cooled through the first cooling cavity and the second cooling cavity to reduce the temperature of the air flow, so that the oil steam in the air flow can be captured by the meniscus and the pipe wall of the exhaust pipeline after being liquefied, the filtering effect is further improved, and the oil gas emission is reduced.

Compared with the prior art, the filter for the slide valve pump has the advantages that: structural design is reasonable, simple, can effectually weaken the flow of air current gradually, makes the air current can not reach the requirement carried by the air current when last casing, the internal flow of inferior valve to make fluid in the air current constantly separate out with oil vapor, form gas-liquid separation, reach filterable purpose, the filter effect is better, stable in structure, convenient to use.

Drawings

Fig. 1 is an exploded perspective view of the filter for the slide valve pump of the present invention.

Fig. 2 is a schematic sectional view of the filter for the slide valve pump.

Fig. 3 is a schematic sectional view in the direction of a-a in fig. 2.

Fig. 4 is a schematic sectional view in the direction B-B in fig. 2.

Fig. 5 is a schematic sectional view showing the structure of the lower housing of the filter for the slide valve pump.

In the figure, 1, lower housing; 2. an upper housing; 3. an air intake duct; 4. a liquid accumulation tank; 5. an exhaust duct; 6. a lower inner tube; 6a, an arc-shaped baffle plate; 7. a circular cover plate; 8. an upper inner tube; 9. an outer pipe sleeve; 10. a centrifugal channel; 11. a first outer annular plate; 12. a second outer annular plate; 13. an annular base plate; 14. the inner annular plate I; 15. a second inner annular plate; 16. an axial arc baffle; 17. a partition plate; 18. a ring-shaped buffer concave position; 19. discharging an oil pipe; 20. a meniscus; 21. turning out the edges; 22. rotating the concave position; 23. a first cooling cavity; 24. a second cooling cavity; 25. a water inlet joint; 26. and a water outlet joint.

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, 3, 4 and 5, the filter for the sliding valve pump mainly comprises a lower shell 1 and an upper shell 2, wherein an air inlet pipeline 3 is arranged on the lower shell 1, the air inlet pipeline 3 extends into the lower shell 1 and forms a liquid accumulation pool 4 with the lower shell 1, the liquid accumulation pool 4 has the functions of capturing and storing oil and facilitating the oil return of the oil to an oil tank of the sliding valve pump, an exhaust pipeline 5 is arranged on the upper shell 2, the upper shell 2 and the lower shell 1 are oppositely connected to form a cavity for gas-liquid filtering separation, the air inlet pipeline 3 is communicated with the exhaust pipeline 5 through the cavity, a filter element is arranged on the air inlet pipeline 3 in the cavity between the air inlet pipeline 3 and the exhaust pipeline 5, a centrifugal guiding device for annular flowing of airflow is arranged between the filter element and the lower shell 1, and a guiding device for baffling and flowing airflow is also arranged between the filter element above the centrifugal guiding device and the lower shell 1, the air flow flows in from the air inlet pipeline 3, the air flow circularly and centrifugally flows through the centrifugal guiding device and forms gas-liquid separation by using centrifugal force, liquid flows into the liquid accumulation pool 4, the residual air flow flows to the flow resistance guiding device and collides with the air flow through the flow resistance guiding device to form gas-liquid separation again, the liquid flows into the liquid accumulation pool 4, and the air is discharged through the air outlet pipeline 5 of the upper shell 2.

As shown in fig. 1 and 2, in actual manufacture, the filter element mainly comprises a lower inner tube 6 and an upper inner tube 8 with a circular cover plate 7,

the upper inner pipe 8 and the lower inner pipe 6 are distributed at intervals in the same axial direction, an outer sleeve 9 is sleeved between the upper inner pipe 8 and the lower inner pipe 6, the upper end of the upper inner pipe 8 is fixedly connected with the upper end of the outer sleeve 9, the lower end of the lower inner pipe 6 is fixedly connected with the lower end of the outer sleeve 9, the upper inner pipe 8 and the lower inner pipe 6 are matched at intervals to form an airflow channel, inner threads are arranged on the inner wall of the lower end of the lower inner pipe 6, outer threads are arranged on the outer wall of the upper end of the air inlet pipeline 3, and the inner threads of the lower end of the lower inner pipe 6 are spirally connected on the outer threads of the upper end of the air inlet pipeline 3; the radial space between the outer sleeve 9 and the upper inner tube 8 and the lower inner tube 6 forms a buffer space for airflow to flow, the buffer space can enable oil in the airflow to generate shunting, and the kinetic energy of partial airflow is weakened after multiple collisions are carried out in the buffer space and the inner wall of the outer sleeve 9 and the outer walls of the upper inner tube 8 and the lower inner tube 6. During actual manufacturing, the centrifugal guide device mainly comprises centrifugal channels 10 which are uniformly distributed on the outer wall of the lower end part of the outer pipe sleeve 9 in the circumferential direction, each centrifugal channel 10 is arc-shaped, and the caliber of each centrifugal channel 10 gradually increases towards the outlet; the flow resistance guide device mainly comprises a first outer annular plate 11 and a second outer annular plate 12 which are arranged at intervals on the outer wall of an outer pipe sleeve 9 along the axial direction of the outer pipe sleeve 9, an annular bottom plate 13 is arranged on the outer wall of a lower inner pipe 6, a first inner annular plate 14 and a second inner annular plate 15 are axially distributed on the inner wall of a lower shell 1 at intervals, and the first outer annular plate 11, the second outer annular plate 12, the annular bottom plate 13, the first inner annular plate 14 and the second inner annular plate 15 are axially distributed in a staggered manner; the outer diameter of the circular cover plate 7 is larger than that of the upper inner pipe 8, and the circular cover plate 7 and the outer annular plate I11 are axially matched at intervals to form an annular buffer concave position 18; the outer wall of the lower inner pipe 6 is circumferentially distributed with lower oil pipes 19 which are axially arranged at intervals, the lower pipe orifices of the lower oil pipes 19 extend into the liquid collecting tank 4, and the upper pipe orifices of the lower oil pipes 19 extend to the first outer annular plate 11 and are communicated with the annular buffer concave 18; the lower extreme of oil pipe 19 extends to the mouth of pipe of ponding 4 in of the lower extreme of oil pipe 19 down through fluid seal, avoids exhaust stream and fluid contact, influences oil pipe 19's last mouth of pipe fluid and flows down to ponding 4 down.

Specifically, the method comprises the following steps: this centrifugal channel 10 is located between annular bottom plate 13 and the outer annular plate two 12, and this centrifugal channel 10 includes axial cowl (16) on the tip outer wall under outer tube sleeve 9 of circumference equipartition, and this axial cowl (16) link firmly perpendicularly on annular bottom plate (13) and the upper edge of axial cowl (16) turn over perpendicularly turn over the arc passageway that extends to outer tube sleeve (9) outer wall and form between outer tube sleeve (9), the inner chamber intercommunication of this arc passageway and outer tube sleeve (9), the outer wall of lower inner tube (6) on still circumference interval distribution have arc to keep off position board (6a), this arc keeps off position board (6a) axial separate in inner tube (6) down, between outer tube sleeve (9) and make the following inner tube (6) of arc passageway form spiral arc opening shape as the center. As shown in fig. 3 and 4, the outer side area of the axial arc-shaped baffle 16 forms a slow flow area, the airflow with the slowest tangential speed in the annular air mass is extruded under the action of centrifugal force, and then is blocked by the axial arc-shaped baffle 16, the tangential movement speed is further reduced to form a slow flow area, and then the slow flow area is upwards discharged under the extrusion of the peripheral airflow (because the downward airflow is blocked by the annular bottom plate 13)

When actually making, circumference interval equipartition has the division board 17 that is radial setting on the outer jacket 9 outer wall between this outer annular plate 11, outer annular plate two 12, and the top edge of this division board 17 extends to outer annular plate 11, and the top edge of this division board 17 extends to outer annular plate two 12, and the inward flange circumference interval equipartition of outer annular plate two 12 has the oilhole of crossing.

During actual manufacturing, four menisci 20 are alternately arranged in the exhaust pipeline 5 along the left and right directions of the axial direction of the exhaust pipeline 5, the adjacent menisci halves 20 are axially matched at intervals, an outward turning edge 21 is further arranged at an inner channel opening of the exhaust pipeline 5, and a rotary concave position 22 is formed between the outward turning edge 21 and the exhaust pipeline 5; be provided with cooling chamber 23 in last casing 2, be provided with cooling chamber two 24 on the exhaust duct 5 that is located last casing 2, this cooling chamber 23, cooling chamber two 24 are linked together, last casing 2 on still be provided with water supply connector 25, water connectors 26, this water supply connector 25, water connectors 26 all communicate with cooling chamber 23.

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 invention. 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 invention as defined in the appended claims.

Claims

1. A filter for a sliding valve pump comprises a lower shell (1) and an upper shell (2), wherein an air inlet pipeline (3) is arranged on the lower shell (1), the air inlet pipeline (3) extends into the lower shell (1) and forms a liquid accumulation pool (4) with the lower shell (1), an exhaust pipeline (5) is arranged on the upper shell (2), the upper shell (2) and the lower shell (1) are oppositely connected to form a containing cavity for gas-liquid filtering separation, the air inlet pipeline (3) is communicated with the exhaust pipeline (5) through the containing cavity, and the filter is characterized in that a filter element is arranged on the air inlet pipeline (3) in the containing cavity between the air inlet pipeline (3) and the exhaust pipeline (5), a centrifugal guide device for annular flowing air flow is arranged between the filter element and the lower shell (1), and a guide device for baffling and flowing air flow is arranged between the filter element above the centrifugal guide device and the lower shell (1), the air flow flows in from the air inlet pipeline (3), the air flow is made to flow in an annular centrifugal mode through the centrifugal guide device and form gas-liquid separation through centrifugal force, liquid flows into the liquid accumulation pool (4), the residual air flow flows to the flow resistance guide device and collides with the air flow through the flow resistance guide device to form gas-liquid separation again, the liquid flows into the liquid accumulation pool (4), and the air is discharged through the exhaust pipeline (5) of the upper shell (2).

2. A filter for a sliding valve pump according to claim 1, characterized in that the filter element comprises a lower inner tube (6) and an upper inner tube (8) with a circular cover plate (7), the upper inner tube (8) and the lower inner tube (6) are arranged at intervals in the same axial direction, an outer sleeve (9) is sleeved between the upper inner pipe (8) and the lower inner pipe (6), the upper inner pipe (8) is fixedly connected with the upper end of the outer sleeve (9), the lower inner pipe (6) is fixedly connected with the lower end of the outer sleeve (9), the outer pipe sleeve (9) is matched with the upper inner pipe (8) and the lower inner pipe (6) at intervals to form an airflow channel, the inner wall of the lower end of the lower inner pipe (6) is provided with internal threads, the outer wall of the upper end of the air inlet pipeline (3) is provided with external threads, the internal thread at the lower end of the lower inner pipe (6) is spirally connected to the external thread at the upper end of the air inlet pipeline (3).

3. A filter for a slide valve pump according to claim 2, wherein the centrifugal guide means comprises centrifugal channels (10) circumferentially and uniformly distributed on the outer wall of the lower end portion of the outer jacket (9), each centrifugal channel (10) is arc-shaped, and the diameter of each centrifugal channel (10) gradually increases toward the outlet.

4. A filter for a sliding valve pump according to claim 3, wherein the flow resistance guide device comprises a first outer annular plate (11) and a second outer annular plate (12) which are arranged on the outer wall of the outer sleeve (9) at intervals along the axial direction of the outer sleeve (9), an annular bottom plate (13) is arranged on the outer wall of the lower inner tube (6), a first inner annular plate (14) and a second inner annular plate (15) are axially distributed on the inner wall of the lower housing (1) at intervals, and the first outer annular plate (11), the second outer annular plate (12), the annular bottom plate (13), the first inner annular plate (14) and the second inner annular plate (15) are axially staggered.

5. A filter for a slide valve pump according to claim 4, characterised in that the centrifugal channel (10) is located between the annular bottom plate (13) and the outer annular plate two (12), the centrifugal channel (10) comprises axial arc-shaped baffles (16) which are uniformly distributed on the outer wall of the lower end part of the outer pipe sleeve (9) in the circumferential direction, the axial arc baffle (16) is vertically and fixedly connected on the annular bottom plate (13), the upper edge of the axial arc baffle (16) is vertically folded and extends to the outer wall of the outer sleeve (9) and forms an arc channel with the outer sleeve (9), the arc channel is communicated with the inner cavity of the outer sleeve (9), the outer wall of the lower inner pipe (6) is also circumferentially distributed with arc baffle plates (6a) at intervals, the arc-shaped baffle plate (6a) is axially separated between the lower inner pipe (6) and the outer pipe sleeve (9) and enables the inner pipe (6) below the arc-shaped channel to form an arc-shaped opening shape as the center.

6. A filter for a slide valve pump according to claim 5, characterized in that the outer wall of the outer sleeve (9) between the first outer annular plate (11) and the second outer annular plate (12) is circumferentially provided with partition plates (17) at intervals in a radial arrangement, the upper edges of the partition plates (17) extend to the first outer annular plate (11), the upper edges of the partition plates (17) extend to the second outer annular plate (12), and the inner edges of the second outer annular plate (12) are circumferentially provided with oil passing holes at intervals.

7. A filter for a sliding valve pump according to claim 6, characterised in that the circular cover plate (7) has an outer diameter greater than that of the upper inner tube (8), the circular cover plate (7) and the outer annular plate one (11) being axially spaced to cooperate to form the annular relief recess (18).

8. A filter for a sliding valve pump according to claim 7, wherein the outer wall of the lower inner pipe (6) is circumferentially and alternately distributed with lower oil pipes (19) which are axially arranged, the lower mouths of the lower oil pipes (19) extend into the liquid collecting tank (4), and the upper mouths of the lower oil pipes (19) extend to the first outer annular plate (11) and are communicated with the annular buffer concave position (18).

9. A filter for a sliding valve pump according to claim 1, wherein a plurality of menisci (20) are alternately arranged in the exhaust duct (5) along the left and right directions of the axis of the exhaust duct (5), adjacent menisci (20) are axially spaced and matched, the inner channel opening of the exhaust duct (5) is further provided with an outward turning edge (21), and a rotation concave position (22) is formed between the outward turning edge (21) and the exhaust duct (5).

10. A filter for a sliding valve pump according to claim 9, wherein a first cooling chamber (23) is provided in the upper housing (2), a second cooling chamber (24) is provided on the exhaust duct (5) in the upper housing (2), the first cooling chamber (23) and the second cooling chamber (24) are communicated, a water inlet joint (25) and a water outlet joint (26) are further provided on the upper housing (2), and the water inlet joint (25) and the water outlet joint (26) are both communicated with the first cooling chamber (23).