CN215204831U - Pneumatic differential pressure type auxiliary exchange device for fluid body replacement - Google Patents

Abstract

The utility model provides a pneumatic differential supplementary exchange device for fluid body is changed, be fixed with the connecting seat with withstand voltage barrel and dysmorphism upper cover detachable connections in withstand voltage barrel upper end, it is sealed through the inflatable sealing member who locates special-shaped upper cover bottom surface between dysmorphism upper cover and the connecting seat, be equipped with the base coupling assembling the same with oil drum quantity on the dysmorphism upper cover, be equipped with the connector rather than inside intercommunication on the outer periphery wall of withstand voltage barrel lower extreme, the gas circuit pipeline fixed connection that connector and compressor are connected, and change the pressure in withstand voltage barrel and the oil drum through the compressor and realize the extrusion of oil in the oil drum or the absorption of outside fluid to the oil drum in. The utility model discloses a fluid body is to the suction in the oil drum or taking out of fluid body in the oil drum, can realize that brake oil changes, machine oil is changed and gear oil is annotated, need not wash withstand voltage barrel and dysmorphism upper cover, has reduced vapour repair factory fluid and has changed required equipment quantity, and the maintenance of equipment input cost greatly reduced has higher using value widely.

Description

Pneumatic differential pressure type auxiliary exchange device for fluid body replacement

Technical Field

The utility model belongs to the technical field of the utensil is assisted in auto repair and maintenance, concretely relates to supplementary exchange device of pneumatic pressure difference for fluid body changes.

Background

At present, when a vehicle is repaired and maintained in a vehicle repair factory, brake oil, engine oil and gear oil are frequently required to be replaced, and a traditional replacement or injection method comprises the following steps: after one oil is replaced, the oil pump is cleaned, and after the oil pump is cleaned, another oil is injected or replaced, by adopting the replacing method, the oil pump is cleaned frequently, so that the labor intensity of maintenance personnel is increased, the working efficiency is low, and the cleaning cost of the oil pump is high; another method is: be equipped with special replacer to every kind of different fluid, when changing the brake oil promptly, adopt the brake oil replacer, when changing machine oil, adopt the machine oil replacer, when pouring into gear oil, use the gear oil replacer, though saved the washing link of oil pump, but the replacement cost improves greatly, consequently, to above-mentioned problem, it is necessary to improve.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: the utility model provides a pneumatic differential pressure type auxiliary exchange device for fluid body is changed, can supply the oil drum to pack into and the supplementary exchange structure who takes out through withstand voltage barrel and the special-shaped upper cover that links firmly with the removable sealed of withstand voltage barrel, and adopt pressure differential suction principle, the suction of fluid body in to the oil drum or the taking out of fluid body in the oil drum has been realized, adopt this structure can realize that the brake oil is changed, machine oil is changed and gear oil is annotated, need not wash withstand voltage barrel and special-shaped upper cover, the required equipment quantity is changed to vapour repair factory fluid has been reduced, moreover, the steam repair system is simple in structure, and convenient for carrying and operation, the maintenance equipment input cost greatly reduced, and has higher popularization and use value.

The utility model adopts the technical proposal that: a pneumatic differential supplementary exchange device for fluid body is changed, including withstand voltage barrel and the dysmorphism upper cover that is located withstand voltage barrel top, withstand voltage barrel upper end is fixed with the connecting seat as an organic whole with withstand voltage barrel and dysmorphism upper cover detachable connections, it is sealed through the inflatable sealing member who locates special-shaped upper cover bottom surface between dysmorphism upper cover and the connecting seat, one or more oil drum has been placed in the withstand voltage barrel, cover on the dysmorphism and be equipped with the base coupling assembling the same with oil drum quantity, and the lower extreme inserts the pipe in the oil drum and be connected with the base coupling assembling, the pipe upper end stretches out special-shaped upper cover setting and is located and be equipped with the switch on the outside pipe of special-shaped upper cover, be equipped with the connector rather than inside intercommunication on the outer periphery wall of withstand voltage barrel lower extreme, the gas circuit pipeline fixed connection that connector and compressor are connected to pressure in changing withstand voltage barrel and the oil drum through the compressor realizes that extrusion of oil liquid in the oil drum or outside is to the absorption in the oil drum And (6) adding.

Wherein, the dysmorphism upper cover is including apron, interior spherical plate and outer arc crown plate, the equipartition has a plurality of spherical connectors on the apron outer circumferential wall, interior spherical plate notch sets up and is fixed in apron bottom surface middle part, outer arc crown plate notch sets up down and is fixed in the inboard at apron top surface border, is located the auxiliary cover and the outer arc crown plate top fixed connection of apron middle part top, the system has a plurality of air vents that are convenient for gas to pass through on the apron of outer arc apron below, auxiliary cover top surface middle part is fixed with the handle of carrying that is convenient for rotate and carry and draws the dysmorphism upper cover, the inner wall of connecting seat is the L shape cell type anchor ring that the corner processed has the fillet, the annular ball groove with the spherical connector adaptation is made in the vertical inner wall middle part of L shape cell type anchor ring, connecting seat up end system has the arc wall the same with spherical connector quantity and communicates with annular ball groove, the spherical connecting head on the special-shaped upper cover enters from the arc-shaped groove and is adapted to the annular ball groove, the spherical connecting head is enabled to be staggered with the arc-shaped groove through rotating the special-shaped upper cover to achieve detachable connection of the pressure-resistant cylinder body and the special-shaped upper cover, the bottom surface of the cover plate is fixed with the positioning ring and the inflatable sealing element sleeved on the outer circumferential wall of the positioning ring is supported on the vertical wall surface and the horizontal wall surface of the lower end of the L-shaped groove-shaped ring surface, the inflation head of the inflatable sealing element penetrates through the hole on the cover plate to be fixed and stretches out of the outer arc-shaped ring plate, the base connecting component is welded and fixed on the cover plate and the inner ball plate, the upper end of a conduit connected with the base connecting component penetrates through and stretches out of the auxiliary cover, and the lower end of the conduit is inserted into the inner portion of the oil drum through the inlet at the upper end of the conduit.

Further, the outer pipe diameter of the guide pipe is smaller than the inner diameter of an inlet of an oil drum, a gap is reserved between the outer wall of the guide pipe inserted into the oil drum and the inner wall of the inlet of the oil drum, and the inflatable sealing element is an inflatable air bag.

Preferably, the base connecting assembly comprises a fixed seat, the fixed seat is of a pipe sleeve structure with a central through hole, the cover plate and the inner spherical plate are provided with mounting holes corresponding to each other in the upper and lower positions, the fixed seat arranged in the mounting holes of the cover plate and the inner spherical plate is welded and fixed on the cover plate and the inner spherical plate, and the guide pipe is fixed in the central through hole of the fixed seat.

Preferably, the base connecting assembly comprises a base I and a hexagonal nut seat, the cover plate and the inner spherical plate are provided with mounting holes corresponding to each other in the vertical position, and the base I arranged in the mounting holes of the cover plate and the inner spherical plate is welded and fixed on the cover plate and the inner spherical plate, the connecting boss at the upper end of the base I is positioned above the cover plate, the inner wall of the base I is provided with a plurality of sealing grooves, the guide pipe is hermetically arranged on the base I through a sealing ring arranged in the sealing groove, the hexagonal nut seat is provided with a groove matched with the connecting boss, and the top surface of the groove is provided with a central through hole, the hexagonal nut seat is sleeved on the guide pipe, the internal thread on the inner side wall of the groove is matched and screwed with the external thread on the outer circumferential wall of the connecting boss, the connecting part of the guide pipe and the connecting boss and the connecting groove is sealed by a sealing ring I which is sleeved on the guide pipe and is positioned between the connecting boss and the connecting groove.

Furthermore, the corners of the inner sides of the upper and lower corresponding surfaces of the connecting boss and the groove are provided with fillets which are convenient for applying pressure to the sealing ring I in a sealing manner.

Preferably, base coupling assembling includes base II, thickening ring and apron I, the system has the mounting hole that the upper and lower position corresponds on apron and the interior spherical plate, and adorns I welded fastening of base in apron and interior spherical plate mounting hole on apron and interior spherical plate, the pipe is fixed in the through-hole of thickening ring, and the thickening ring lower extreme that is located base II is located on the location boss mesa of II lower extremes of base, be equipped with a plurality of sealing washers II between on the outer circumferential wall of thickening ring and the II inner walls of base, adopts screw fixed mounting to support tightly in base II with thickening ring at apron I of II upper ends of base.

Furthermore, an overflow valve and a barometer convenient for detecting the gas pressure in the pressure-resistant cylinder body are arranged on the outer arc-shaped cover plate.

Further, be fixed with the supporting diaphragm on the withstand voltage barrel lower extreme inner wall, place the oil drum on the supporting diaphragm and separate oil drum and withstand voltage barrel by a plurality of locating plates of equipartition on the supporting diaphragm inboard at face border.

The utility model has the advantages compared with the prior art:

1. according to the technical scheme, the auxiliary exchange structure which consists of the pressure-resistant cylinder and the special-shaped upper cover detachably and hermetically fixedly connected with the pressure-resistant cylinder and can be used for loading and taking out the oil drum is adopted, and a differential pressure suction principle is adopted, so that the suction of fluid into the oil drum or the extraction of the fluid in the oil drum is realized;

2. according to the technical scheme, the special-shaped upper cover is formed by fixedly connecting the cover plate, the inner spherical plate and the outer arc-shaped ring plate provided with the vent holes, so that the pressure resistance of the special-shaped upper cover is improved, compressed air in the pressure-resistant cylinder can be favorably distributed to an area between the outer arc-shaped ring plate and the cover plate, and the phenomenon of stress concentration of the inner spherical plate is eliminated;

3. according to the technical scheme, the connecting mode of the special-shaped upper cover and the pressure-resistant cylinder body adopts a structure that a spherical connector is in adaptive connection with an annular spherical groove, and the connecting position of the connecting seat and the special-shaped upper cover is provided with the inflatable air bag, so that the special-shaped upper cover and the pressure-resistant cylinder body are sealed, the examination sealing condition is provided for the special-shaped upper cover and the pressure-resistant cylinder body, the reliable sealing performance of an inner cavity formed by the special-shaped upper cover and the pressure-resistant cylinder body is ensured, and a necessary sealing environment is provided for the suction or the extraction of a fluid body into an oil drum;

4. according to the technical scheme, the base connecting assembly is arranged on the special-shaped upper cover, so that a necessary sealing connecting structure is provided for the connection of the guide pipe on the special-shaped upper cover, and the sealing reliability of the connection of the guide pipe and the opposite-shaped upper cover is ensured;

5. this technical scheme is equipped with the oil drum of different fluidal bodies through changing, can realize that brake fluid changes, machine oil change and gear oil filling, need not wash withstand voltage barrel and dysmorphism upper cover, has reduced vapour repair factory fluid and has changed required equipment quantity, simple structure, carries convenient operation, maintenance of equipment input cost greatly reduced has higher using value widely.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is a top view of the present invention;

fig. 3 is a schematic structural view of a first base connecting assembly according to the present invention;

fig. 4 is a schematic structural view of a second base connecting assembly according to the present invention;

fig. 5 is a schematic structural view of a third base connection assembly according to the present invention.

Detailed Description

An embodiment of the present invention will be described in conjunction with fig. 1-5 to clearly and completely describe the technical solution, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

A pneumatic pressure difference type auxiliary exchange device for fluid body replacement, as shown in fig. 1-3, is a schematic structural diagram of the pneumatic pressure difference type auxiliary exchange device when a first base connection assembly is adopted, and the specific structure is as follows: the pressure-resistant cylinder comprises a pressure-resistant cylinder body 1 and a special-shaped upper cover 2 positioned above the pressure-resistant cylinder body 1, wherein a connecting seat 3 which detachably connects the pressure-resistant cylinder body 1 and the special-shaped upper cover 2 into a whole is fixed at the upper end of the pressure-resistant cylinder body 1, the special-shaped upper cover 2 and the connecting seat 3 are sealed by an inflatable sealing element 4 arranged at the bottom surface of the special-shaped upper cover 2, one or more oil drums 7 are placed in the pressure-resistant cylinder body 1, base connecting components 6 with the same number as the oil drums 7 are arranged on the special-shaped upper cover 2, a conduit 8 with the lower end inserted into the oil drum 7 is connected with the base connecting components 6, a switch is arranged on the conduit 8 which extends out of the special-shaped upper cover 2 and is positioned outside the special-shaped upper cover 2, the conduit 8 is a hose, so that the switch on the conduit 8 is a flow-adjustable switch regulator, and a connector 5 communicated with the inside of the pressure-resistant cylinder body 1 is arranged on the outer circumferential wall of the lower end, gas circuit pipeline fixed connection that connector 5 and compressor are connected to pressure in the pressure-resistant barrel 1 of change through the compressor and the oil drum 7 realizes the extrusion of oil in the oil drum 7 or outside oil is to the suction in the oil drum 7.

Specifically, the special-shaped upper cover 2 comprises a cover plate 2-1, an inner spherical plate 2-2 and an outer arc-shaped ring plate 2-3, wherein a plurality of spherical connectors 2-4 are uniformly distributed on the outer circumferential wall of the cover plate 2-1, the notch of the inner spherical plate 2-2 is upwards arranged and fixed (welded) in the middle of the bottom surface of the cover plate 2-1, the notch of the outer arc-shaped cover plate 2-3 is downwards arranged and fixed (welded) on the inner side of the edge of the top surface of the cover plate 2-1, an auxiliary cover 2-5 positioned above the middle of the cover plate 2-1 is fixedly (welded) connected with the top of the outer arc-shaped cover plate 2-3, a plurality of vent holes 2-8 convenient for gas to pass through are formed on the cover plate 2-1 below the outer arc-shaped cover plate 2-3, a lifting handle 2-6 convenient to rotate and lift the special-shaped upper cover 2 is fixed in the middle of the top surface of the auxiliary cover 2-5, the inner wall of the connecting seat 3 is an L-shaped groove-shaped ring surface 3-3 with a fillet processed at the corner, the middle part of the vertical inner wall of the L-shaped groove-shaped ring surface 3-3 is provided with an annular ball groove 3-2 matched with the spherical connectors 2-4, the upper end surface of the connecting seat 3 is provided with arc grooves 3-1 which are the same with the spherical connectors 2-4 in quantity and communicated with the annular ball groove 3-2, the spherical connectors 2-4 on the special-shaped upper cover 2 enter from the arc grooves 3-1 and are matched in the annular ball groove 3-2, the spherical connectors 2-4 are staggered with the arc grooves 3-1 by rotating the special-shaped upper cover 2 to realize the detachable connection of the pressure-resistant cylinder body 1 and the special-shaped upper cover 2, the bottom surface of the cover plate 2-1 is fixed with a positioning ring 2-7, and an inflatable sealing element 4 sleeved on the outer circumferential wall of the positioning ring 2-7 is abutted to the lower end of the L-shaped groove-shaped ring surface 3-3 On vertical wall and horizontal wall, the inflation head of inflatable sealing element 4 passes through the hole on apron 2-1 and fixes and stretch out outer arc shape crown plate 2-3 setting, base coupling assembling 6 welded fastening is on apron 2-1 and interior spherical plate 2-2, and the pipe 8 upper end of being connected with base coupling assembling 6 passes and stretches out supplementary cover 2-5 setting, the pipe 8 lower extreme inserts in its inside by the entry of oil drum 7 upper end, in the above-mentioned structure, special-shaped upper cover 2 has the effect of reposition of redundant personnel minute load, therefore, special-shaped upper cover 2's compressive capacity is strong, and reliable and stable is good.

Specifically, the outer pipe diameter of the conduit 8 is smaller than the inner diameter of the inlet of the oil drum 7, a gap is reserved between the outer wall of the conduit 8 inserted into the oil drum 7 and the inner wall of the inlet of the oil drum 7, the gap is favorable for compressed air sent from the connector 5 to enter the oil drum 7, the pressure in the oil drum 7 is ensured to be the same as the pressure in the pressure-resistant cylinder 1, the inflatable sealing element 4 is an inflatable sealing air bag which is pressed tightly and attached to the cover plate and an L-shaped groove-shaped ring surface 3-3 at the lower end of the connecting seat 3 after being inflated and expanded, the connecting seat 3 and the cover plate 2-1 are sealed, so that the reliable sealing performance between the special-shaped upper cover 2 and the pressure-resistant cylinder body 1 is ensured, and simultaneously, on the premise of reliable sealing of the inflatable sealing air bag, the special-shaped upper cover 2 and the connecting seat 3 are automatically locked after bearing pressure by adopting the spherical connector 2-4 and the annular spherical groove 3-2 for adaptive connection.

FIG. 3 shows the structure of a first base connection assembly 6, FIG. 1 shows the structure of an auxiliary exchange device with the first base connection assembly 6, the base connection assembly 6 includes a base II 6-7, a thickened ring 6-8 and a cover plate I6-9, the cover plate 2-1 and an inner spherical plate 2-2 are provided with mounting holes corresponding to each other in the vertical direction, the base I6-2 installed in the mounting holes of the cover plate 2-1 and the inner spherical plate 2-2 is welded and fixed on the cover plate 2-1 and the inner spherical plate 2-2, the conduit 8 is fixed in the through hole of the thickened ring 6-8, the lower end of the thickened ring 6-8 in the base II 6-7 is located on the positioning boss 6-10 of the lower end of the base II 6-7, a plurality of sealing rings II 6-8 are arranged between the outer circumferential wall of the thickened ring 6-8 and the inner wall of the base II 6-7 11, a cover plate I6-9 fixedly arranged at the upper end of the base II 6-7 by screws is adopted to tightly support and fix the thickened circular ring 6-8 in the base II 6-7; specifically, the outer arc-shaped cover plate 2-3 is provided with a pressure relief valve and a barometer which is convenient for detecting the gas pressure in the pressure-resistant cylinder 1; concretely, be fixed with supporting diaphragm 9 on the 1 lower extreme inner wall of withstand voltage barrel, place oil drum 7 on supporting diaphragm 9 and separate oil drum 7 and withstand voltage barrel 1 by a plurality of locating plates 10 of equipartition face border inboard on supporting diaphragm 9 to avoid because oil drum 7 warp and paste withstand voltage barrel 1 tightly, lead to the drawback that pressure gas can't fill in oil drum 7. By adopting the base connecting component 6 with the structure, the cover plate I6-9 is fixedly connected with the base II 6-7 through screws, the thickened circular rings 6-8 are tightly propped against the base II 6-7 through the cover plate I6-9, so that the base II 6-7 and the thickened circular rings 6-8 are sealed through the sealing rings II 6-11, after the oil drums 7 of different fluid bodies are replaced, the cover plate I6-9 is detached and then the thickened circular rings 6-8 are drawn out, and the corresponding conduit 8 used by the fluid bodies and the thickened circular rings 6-8 are installed again without cleaning.

As shown in fig. 4, a second structure of the base connection assembly 6 is shown, specifically, the base connection assembly 6 includes a base i 6-2 and a hexagonal nut seat 6-3, the cover plate 2-1 and the inner spherical plate 2-2 are provided with mounting holes corresponding to each other in the vertical direction, the base i 6-2 installed in the mounting holes of the cover plate 2-1 and the inner spherical plate 2-2 is welded and fixed to the cover plate 2-1 and the inner spherical plate 2-2, a connection boss 6-4 at the upper end of the base i 6-2 is located above the cover plate 2-1, the inner wall of the base i 6-2 is provided with a plurality of sealing grooves, a conduit 8 is hermetically installed on the base i 6-2 through a sealing ring 6-5 arranged in the sealing groove, and the connection between the base i 6-2 and the conduit 8 is sealed by the plurality of sealing rings 6-5, the hexagonal nut seat 6-3 is provided with a groove 6-6 matched with the connecting boss 6-4, and the top surface of the groove 6-6 is provided with a central through hole, the hexagonal nut seat 6-3 is sleeved on the guide pipe 8, the internal thread on the inner side wall of the groove 6-6 is matched and screwed with the external thread on the outer circumferential wall of the connecting boss 6-4, the connecting part of the conduit 8 and the connecting boss 6-4 and the groove 6-6 is sealed by a sealing ring I6-12 which is sleeved on the conduit 8 and is positioned between the connecting boss 6-4 and the groove 6-6, and the connecting part of the base I6-2, the hexagonal nut seat 6-3 and the conduit 8 is sealed after the base I6-2 and the hexagonal nut seat 6-3 are matched and screwed with each other and the sealing ring I6-12 is extruded; specifically, the inner corners of the upper and lower corresponding surfaces of the connecting boss 6-4 and the groove 6-6 are respectively provided with a fillet 6-13 which is convenient for sealing and pressing the sealing ring I6-12, so that the friction force between the sealing ring I6-12 and the guide pipe 8 is increased, and the guide pipe 8 is positioned and fixed in a sliding manner; in the base connecting assembly 6 with the structure, the base I6-2 and the hexagonal nut seat 6-3 are matched and screwed, then the sealing ring I6-12 between the base I6-2 and the hexagonal nut seat 6-3 is pressed, the sealing ring I6-12 presses the conduit 8 to seal, although the conduit 8 is a hose, when the pressure difference exists between the pressure cylinder body 1 and the outside, so that fluid flows through the conduit 8, the guide pipe 8 is opened under the action of the fluid body, the sealing rings I6-12 and the sealing rings 6-5 are ensured to be tightly attached and sealed to the outer wall of the guide pipe 8, when the oil drums 7 of different fluid bodies are replaced, the guide pipe 8 corresponding to the fluid body in the oil drum 7 is installed again after the guide pipe 8 is pulled out by unscrewing the hexagonal nut seats 6-3, and when different fluid bodies are replaced or injected, the conduit 8 does not need to be cleaned, and only the conduit 8 used corresponding to the fluid needs to be installed again.

As shown in fig. 5, which is a third specific structure of the base connection assembly 6, the base connection assembly 6 includes a fixed seat 6-1, the fixed seat 6-1 is a pipe sleeve structure with a central through hole, the cover plate 2-1 and the inner spherical plate 2-2 are provided with mounting holes corresponding to each other in the vertical direction, the fixed seat 6-1 installed in the mounting holes of the cover plate 2-1 and the inner spherical plate 2-2 is welded and fixed to the cover plate 2-1 and the inner spherical plate 2-2, and the guide pipe 8 is fixed in the central through hole of the fixed seat 6-1.

The technical proposal adopts an auxiliary exchange structure which is composed of a pressure-resistant cylinder body 1 and a special-shaped upper cover 2 detachably and hermetically fixedly connected with the pressure-resistant cylinder body 1 and can be used for loading and taking out an oil drum 7, and adopts a pressure difference suction principle to realize the suction of a fluid body into the oil drum 7 or the extraction of the fluid body in the oil drum 7, adopts the special-shaped upper cover 2 which is fixedly connected by a cover plate 2-1, an inner spherical plate 2-2 and an outer arc-shaped annular plate 2-3 provided with vent holes 2-8, improves the pressure resistance of the special-shaped upper cover 2, is favorable for shunting compressed air in the pressure-resistant cylinder body 1 to a region between the outer arc-shaped annular plate 2-3 and the cover plate 2-1, eliminates the phenomenon of stress concentration of the inner spherical plate 2-2, adopts a structure that a spherical connector 2-4 is in adaptive connection with an annular spherical groove 3-2 in the connection mode of the special-shaped upper cover 2 and the pressure-resistant cylinder body 1, the sealing between the special-shaped upper cover 2 and the pressure-resistant cylinder body 1 is realized by arranging the inflatable air-tight sealing bag at the joint of the connecting seat 3 and the special-shaped upper cover 2, the sealing condition for a pioneer is provided for the special-shaped upper cover 2 and the pressure-resistant cylinder body 1, the reliable sealing performance of an inner cavity formed by the special-shaped upper cover 2 and the pressure-resistant cylinder body 1 is ensured, a necessary sealing environment is provided for the suction or the extraction of a fluid body into the oil drum 7, a necessary sealing connection structure is provided for the connection of the guide pipe 8 on the special-shaped upper cover 2 by arranging the base connection component 6 on the special-shaped upper cover 2, the sealing reliability of the connection of the guide pipe 8 and the opposite-shaped upper cover 2 is ensured, the brake oil replacement, the engine oil replacement and the gear oil filling can be realized by replacing the oil drums 7 provided with different fluid bodies, the pressure-resistant cylinder body 1 and the special-shaped upper cover 2 do not need to be cleaned, the number of equipment required by oil replacement in a steam maintenance plant is reduced, and the structure is simple, the portable multifunctional electric water heater is convenient to carry and operate, greatly reduces the investment cost of maintenance equipment, and has higher popularization and use values.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims (9)

1. A supplementary exchange device of pneumatic differential pressure formula for fluid body is changed, its characterized in that: comprises a pressure-proof cylinder body (1) and a special-shaped upper cover (2) positioned above the pressure-proof cylinder body (1), wherein the upper end of the pressure-proof cylinder body (1) is fixedly provided with a connecting seat (3) which integrates the pressure-proof cylinder body (1) and the special-shaped upper cover (2) in a detachable way, the special-shaped upper cover (2) and the connecting seat (3) are sealed by an inflatable sealing element (4) arranged at the bottom surface of the special-shaped upper cover (2), one or more oil drums (7) are placed in the pressure-proof cylinder body (1), the special-shaped upper cover (2) is provided with base connecting components (6) with the same number as the oil drums (7), the lower end of each base connecting component is inserted into a guide pipe (8) in each oil drum (7) and is connected with the base connecting components (6), the upper end of each guide pipe (8) extends out of the special-shaped upper cover (2) and is provided with a switch positioned on the guide pipe (8) outside the special-shaped upper cover (2), the outer circumferential wall of the lower end of the pressure-proof cylinder body (1) is provided with a connecting head (5) communicated with the inner part thereof, gas circuit pipeline fixed connection that connector (5) and compressor are connected to pressure in pressure-resistant barrel (1) and oil drum (7) is changed through the compressor and the extrusion of fluid in oil drum (7) or the outside fluid is to the suction in oil drum (7) is realized.

2. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 1, wherein: the special-shaped upper cover (2) comprises a cover plate (2-1), an inner spherical plate (2-2) and an outer arc-shaped cover plate (2-3), wherein a plurality of spherical connectors (2-4) are uniformly distributed on the outer circumferential wall of the cover plate (2-1), the notch of the inner spherical plate (2-2) is upwards arranged and fixed in the middle of the bottom surface of the cover plate (2-1), the notch of the outer arc-shaped cover plate (2-3) is downwards arranged and fixed on the inner side of the edge of the top surface of the cover plate (2-1), an auxiliary cover (2-5) positioned above the middle of the cover plate (2-1) is fixedly connected with the top of the outer arc-shaped cover plate (2-3), a plurality of vent holes (2-8) convenient for gas to pass through are formed in the cover plate (2-1) below the outer arc-shaped cover plate (2-3), and a special-shaped cover (2-5) convenient to rotate and lift the upper cover (2) is fixed in the middle of the top surface of the auxiliary cover (2-5) A handle (2-6) is held, an L-shaped groove-shaped ring surface (3-3) with a round corner is processed on the inner wall of the connecting seat (3) for the corner, an annular ball groove (3-2) matched with the spherical connector (2-4) is manufactured in the middle of the vertical inner wall of the L-shaped groove-shaped ring surface (3-3), an arc-shaped groove (3-1) with the same quantity as the spherical connectors (2-4) and communicated with the annular ball groove (3-2) is manufactured on the upper end surface of the connecting seat (3), the spherical connectors (2-4) on the special-shaped upper cover (2) enter from the arc-shaped groove (3-1) and are matched in the annular ball groove (3-2), and the pressure-resistant cylinder body (1) and the pressure-resistant upper cover (2) are connected after the spherical connectors (2-4) are staggered with the arc-shaped groove (3-1) by rotating the detachable special-shaped upper cover (2), the bottom surface of the cover plate (2-1) is fixed with a positioning ring (2-7), an inflatable sealing element (4) sleeved on the outer circumferential wall of the positioning ring (2-7) abuts against the vertical wall surface and the horizontal wall surface of the lower end of the L-shaped groove-shaped ring surface (3-3), an inflation head of the inflatable sealing element (4) penetrates through a hole in the cover plate (2-1) to be fixed and extends out of the outer arc-shaped cover plate (2-3) to be arranged, the base connecting assembly (6) is welded and fixed on the cover plate (2-1) and the inner spherical plate (2-2), the upper end of a guide pipe (8) connected with the base connecting assembly (6) penetrates through and extends out of the auxiliary cover (2-5) to be arranged, and the lower end of the guide pipe (8) is inserted into the inner part of the oil drum (7) through an inlet at the upper end of the oil drum (7).

3. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 2, wherein: the outer pipe diameter of the guide pipe (8) is smaller than the inner diameter of an inlet of the oil drum (7), a gap is reserved between the outer wall of the guide pipe (8) inserted into the oil drum (7) and the inner wall of the inlet of the oil drum (7), and the inflatable sealing element (4) is an inflatable air bag.

4. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 3, wherein: the base connecting assembly (6) comprises a fixed base (6-1), the fixed base (6-1) is of a pipe sleeve structure with a central through hole, mounting holes corresponding to the upper and lower positions are formed in the cover plate (2-1) and the inner spherical plate (2-2), the fixed base (6-1) arranged in the mounting holes of the cover plate (2-1) and the inner spherical plate (2-2) is welded and fixed on the cover plate (2-1) and the inner spherical plate (2-2), and the guide pipe (8) is fixed in the central through hole of the fixed base (6-1).

5. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 3, wherein: the base connecting assembly (6) comprises a base I (6-2) and a hexagonal nut seat (6-3), mounting holes corresponding to the upper and lower positions are formed in the cover plate (2-1) and the inner spherical plate (2-2), the base I (6-2) arranged in the mounting holes of the cover plate (2-1) and the inner spherical plate (2-2) is fixedly welded on the cover plate (2-1) and the inner spherical plate (2-2), a connecting boss (6-4) at the upper end of the base I (6-2) is positioned above the cover plate (2-1), a plurality of sealing grooves are formed in the inner wall of the base I (6-2), a guide pipe (8) is hermetically arranged on the base I (6-2) through a sealing ring (6-5) arranged in the sealing grooves, a groove (6-6) matched with the connecting boss (6-4) is formed in the hexagonal nut seat (6-3), and the groove top surface of the groove (6-6) is provided with a central through hole, the hexagonal nut seat (6-3) is sleeved on the guide pipe (8), the internal thread on the inner side wall of the groove (6-6) is matched and screwed with the external thread on the outer circumferential wall of the connecting boss (6-4), and the connecting part of the guide pipe (8) and the connecting boss (6-4) and the groove (6-6) is sealed by a sealing ring I (6-12) which is sleeved on the guide pipe (8) and is positioned between the connecting boss (6-4) and the groove (6-6).

6. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 5, wherein: and fillets (6-13) which are convenient for sealing and pressing the sealing rings I (6-12) are respectively arranged at the inner corners of the upper and lower corresponding surfaces of the connecting boss (6-4) and the groove (6-6).

7. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 3, wherein: the base connecting assembly (6) comprises a base II (6-7), a thickening ring (6-8) and a cover plate I (6-9), wherein mounting holes corresponding to each other in the vertical position are formed in the cover plate (2-1) and the inner spherical plate (2-2), the base I (6-2) arranged in the mounting holes of the cover plate (2-1) and the inner spherical plate (2-2) is fixedly welded on the cover plate (2-1) and the inner spherical plate (2-2), the guide pipe (8) is fixed in a through hole of the thickening ring (6-8), the lower end of the thickening ring (6-8) positioned in the base II (6-7) is located on the table surface of a positioning boss (6-10) at the lower end of the base II (6-7), a plurality of sealing rings II (6-11) are arranged between the outer circumferential wall of the thickening ring (6-8) and the inner wall of the base II (6-7), the thickened circular ring (6-8) is tightly propped and fixed in the base II (6-7) by adopting a cover plate I (6-9) fixedly arranged at the upper end of the base II (6-7) through screws.

8. A pneumatic pressure differential auxiliary exchange device for exchange of fluid bodies according to claim 2 or 3 or 4 or 5 or 6 or 7, characterized in that: the outer arc-shaped cover plate (2-3) is provided with a pressure relief valve and a barometer which is convenient for detecting the gas pressure in the pressure-resistant cylinder body (1).

9. The pneumatic pressure differential assisted exchange device for exchange of fluid bodies of claim 8, wherein: supporting partition plates (9) are fixed on the inner wall of the lower end of the pressure-resistant cylinder body (1), and oil drums (7) placed on the supporting partition plates (9) are separated from the pressure-resistant cylinder body (1) by a plurality of positioning plates (10) which are uniformly distributed on the supporting partition plates (9) and are arranged on the inner side of the edge of the upper plate surface.

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