CN112211712A

CN112211712A - Expansion tank

Info

Publication number: CN112211712A
Application number: CN201910628945.0A
Authority: CN
Inventors: 崔振华; 朱亮; 林寅龙; 李鑫; 罗雪丰
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2019-07-12
Filing date: 2019-07-12
Publication date: 2021-01-12

Abstract

The utility model provides an expansion tank, includes the case lid, goes up casing and lower casing, goes up the casing and is located casing top down, and the case lid is installed on the case lid mouth of last casing, has the pressure valve in the case lid mouth, and the lateral wall of case lid mouth is equipped with the trompil, is equipped with on the expansion tank from last casing extend to down the casing and with the runner of trompil intercommunication, at least some of pressure valve can be under the effect of expansion tank internal pressure up-and-down motion, expose or plug up the trompil.

Description

Expansion tank

Technical Field

The invention relates to the technical field of automobile engines, in particular to an expansion tank.

Background

The expansion tank is a part of an automobile cooling system and has the functions of adjusting the water quantity of an engine, storing cooling liquid of a refrigerator and the like. The expansion tank is communicated with the radiator and the engine through pipelines respectively, and cooling liquid from the radiator and the engine directly circulates through the expansion tank. However, under some working conditions, such as when the engine is overheated, the pressure in the expansion tank increases, and water or steam in the expansion tank needs to be discharged partially, and the existing expansion tank generally overflows the part of water or steam from a tank cover opening on the upper shell to the upper shell of the expansion tank, so that the danger of the phenomenon that the tank cover is flushed and the top of the tank cover is generated is caused, and water stain is possibly formed on the surface of the upper shell after the liquid is dried, thereby affecting the commercial performance of the whole vehicle. In addition, the pipe orifice of the water outlet pipe of the general expansion tank is integrally injection-molded with the shell, and when the expansion tank is limited by arrangement of the engine room, the expansion tank has to be repaired or opened again due to insufficient clearance, so that the production cost is increased.

Disclosure of Invention

In view of the above, the present invention provides an expansion tank with a concealed drain line.

The expansion tank provided by the invention comprises a tank cover, an upper shell and a lower shell, wherein the upper shell is positioned above the lower shell, the tank cover is arranged on a tank cover opening of the upper shell, a pressure valve is arranged in the tank cover opening, an opening is formed in the side wall of the tank cover opening, a flow passage which extends from the upper shell to the lower shell and is communicated with the opening is arranged on the expansion tank, and at least one part of the pressure valve can move up and down under the action of the pressure in the expansion tank to expose or block the opening.

Further, the pressure valve comprises a valve seat, a valve body capable of moving up and down relative to the valve seat and an elastic body located between the valve seat and the valve body, and the opening is located between the valve seat and the valve body.

Further, the expansion tank also comprises a first sealing ring positioned between the valve seat and the tank cover opening and a second sealing ring positioned between the valve body and the tank cover opening, and the second sealing ring is positioned below the first sealing ring.

Further, the expansion tank also comprises a liquid storage cavity positioned between the first sealing ring and the second sealing ring, and the liquid storage cavity is communicated with the opening.

Furthermore, the first sealing ring and the second sealing ring are respectively sleeved outside the valve seat and the valve body and are attached and sealed with the opening of the box cover.

Further, the valve seat and the valve body are respectively provided with a first annular groove and a second annular groove, and the first sealing ring and the second sealing ring are respectively arranged in the first annular groove and the second annular groove and are in interference fit with the box cover opening.

Furthermore, one part of the cover opening of the box protrudes out of the upper surface of the upper shell, the other part of the cover opening of the box extends into the internal space of the expansion box, and the opening is formed in the part, extending into the internal space of the expansion box, of the cover opening of the box.

Further, the flow channel penetrates through the lower shell from the upper shell to the lower shell downwards and longitudinally and is communicated with the outside of the expansion tank.

Furthermore, the upper shell is connected with a water inlet pipe, the lower shell is connected with a water outlet pipe, and the connection angle of the water outlet pipe and the water outlet of the lower shell is adjustable.

Furthermore, the expansion tank is internally provided with a middle cavity and a plurality of side cavities arranged around the middle cavity, the side cavities are communicated with the middle cavity through communicating grooves or communicating holes, the tank cover opening is positioned above the middle cavity, and the flow channel is arranged on the side edge of the middle cavity.

The invention solves the problem of tank cover top rushing caused by overlarge internal pressure of the expansion tank when the temperature of the engine is higher by adding the pressure valve and the flow passage in the expansion tank, and simultaneously avoids adding extra pipelines by the flow passage hidden in the expansion tank, thereby saving the space in the engine room and improving the platformization and commercialization degree of the engine room.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of an expansion tank provided by the present invention.

Fig. 2 is a sectional view of the expansion tank provided by the present invention.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.

The expansion tank of the present invention is located within the engine compartment.

Referring to fig. 1, the expansion tank includes a tank cover 1, an upper housing 2 and a lower housing 3, the upper housing 2 is located above the lower housing 3, the lower portion of the upper housing 2 is welded to the upper portion of the lower housing 3, the tank cover 1 is mounted on a tank cover opening 11 at the top of the upper housing 2, a portion of the tank cover opening 11 protrudes out of the upper surface of the upper housing 2, and the other portion of the tank cover opening protrudes into the inner space of the expansion tank, the upper housing 2 is connected with a water inlet pipe 6, the water inlet pipe 6 includes a radiator return pipe and an engine return pipe, the radiator return pipe receives return water of coolant from the radiator, and the engine return pipe receives return water of coolant from the engine. The bottom of the lower shell 3 is connected with a water outlet pipe 7, the water outlet pipe 7 is connected with an engine, and when the engine needs, cooling liquid is transmitted to the engine. In this embodiment, outlet pipe 7 is independent weldable outlet pipe 7, and through adjusting the welding frock between outlet pipe 7 and lower casing 3, the orientation and the angle of adjustable outlet pipe 7 adapt to the multiple engine cabin condition of arranging, practices thrift the under-deck space.

Further, please refer to fig. 2 together, the expansion tank is provided with a middle cavity inside and a plurality of side cavities around the middle cavity inside, the side cavities are communicated with the middle cavity through a communication groove or a communication hole, the tank cover opening 11 is located above the middle cavity, the opening 9 is located on the side wall of the middle cavity between the tank cover opening 11 extending into the expansion tank inner space and the runner 8, the runner 8 is located on the side of the middle cavity, the runner 8 longitudinally penetrates through the lower shell 3 from the upper shell 2 and is communicated with the outside of the expansion tank, the position of the runner 8 can be properly adjusted according to the actual installation position of the expansion tank, as long as the key components such as a circuit are avoided, and the cooling liquid flowing out from the runner 8 directly flows into the cabin. In the present embodiment, the flow passage 8 is located in the front part of the expansion tank and communicates with the external nacelle through the lower part of the expansion tank.

Further, the expansion tank further includes a pressure valve 4, and the pressure valve 4 includes a valve seat 42, a valve body 41 capable of moving up and down with respect to the valve seat 42, and an elastic body 43. The pressure valve 4 is located in a tank cover port 11 of the upper housing 2. Sealing ring 5 is located the end cover mouth of casing 2, it is parallel with case lid mouth 11, including first sealing ring 51 and second sealing ring 52, first sealing ring 51 is located between disk seat 42 and the case lid mouth 11, the second sealing ring is located between valve body 41 and the case lid mouth 11, second sealing ring 52 is located first sealing ring 51 below, first sealing ring 51 and second sealing ring 52 overlap respectively and locate outside disk seat 42 and the valve body 41, and with the laminating of case lid mouth 11 sealed, still be equipped with first annular and second annular outward respectively for disk seat 42 and valve body 41, first sealing ring 51 and second sealing ring 52 are located respectively in first annular and the second annular, and with 11 interference fit of case lid mouth. Also included in the pressure valve 4 is an elastomer 43, the elastomer 43 being a common structure within the pressure valve 4, in this embodiment the elastomer 43 being a spring.

Further, a liquid storage cavity is formed between the first sealing ring 51 and the second sealing ring 52, the liquid storage cavity is a space formed by the first sealing ring 51 and the second sealing ring 52, and the valve body 41 of the pressure valve 4 is partially located in the liquid storage cavity.

Furthermore, the opening 9 is formed in the side wall of the middle cavity between the liquid storage cavity and the flow channel 8, and the opening 11 of the box cover extends into the inner space of the expansion box. The opening 9 is communicated with the flow passage 8 to form a liquid drainage route from the expansion tank cavity to the liquid storage cavity and then into the flow passage 8 after passing through the opening 9.

Specifically, when the engine temperature is high, the temperature in the expansion tank rises, the internal pressure increases, and the volumes of water and steam in the expansion tank increase. At this moment, the pressure valve inlet at the lower part of the valve body 41 moves upwards, the pressure valve 4 is opened, liquid and gas rush into the liquid storage cavity, then flow into the flow channel 8 through the opening 9, and are discharged out of the expansion tank, so that the problem of top rushing of a tank cover caused by overlarge pressure in the expansion tank is avoided, and meanwhile, additional management is avoided, and meanwhile, liquid drainage and exhaust of a hidden pipeline inside the expansion tank are realized.

In conclusion, the pressure valve and the flow channel are additionally arranged in the expansion tank, so that the problem of tank cover top rushing caused by overlarge internal pressure of the expansion tank when the temperature of the engine is high is solved, meanwhile, the flow channel hidden in the expansion tank avoids adding an additional pipeline, the space in the engine room is saved, and the platformization and commercialization degree of the engine room is improved. In addition, the water outlet pipe used by the invention is an adjustable welding type water outlet pipe, so that the invention is suitable for arrangement conditions of various engine cabins, and the space occupied by the expansion tank in the engine cabin is further saved.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An expansion tank, characterized in that: the expansion tank comprises a tank cover (1), an upper shell (2) and a lower shell (3), wherein the upper shell (2) is located above the lower shell (3), the tank cover (1) is installed on a tank cover opening (11) of the upper shell (2), a pressure valve (4) is arranged in the tank cover opening (11), an opening (9) is formed in the side wall of the tank cover opening (11), the expansion tank is provided with a flow channel (8) which is formed by extending the upper shell (2) to the lower shell (3) and communicating with the opening (9), and at least one part of the pressure valve (4) can move up and down under the action of the pressure inside the expansion tank to expose or block the opening (9).

2. The expansion tank according to claim 1, characterized in that: the pressure valve (4) comprises a valve seat (42), a valve body (41) capable of moving up and down relative to the valve seat (42), and an elastic body (43) located between the valve seat (42) and the valve body (41), and the opening (9) is located between the valve seat (42) and the valve body (41).

3. The expansion tank according to claim 2, characterized in that: the expansion tank further comprises a first sealing ring (51) located between the valve seat (42) and the tank cover opening (11) and a second sealing ring (52) located between the valve body (41) and the tank cover opening (11), and the second sealing ring (52) is located below the first sealing ring (51).

4. An expansion tank according to claim 3, characterized in that: the expansion tank further comprises a liquid storage cavity located between the first sealing ring (51) and the second sealing ring (52), and the liquid storage cavity is communicated with the opening (9).

5. An expansion tank according to claim 3, characterized in that: the first sealing ring (51) and the second sealing ring (52) are respectively sleeved outside the valve seat (42) and the valve body (41) and are attached and sealed with the box cover opening (11).

6. The expansion tank according to claim 5, wherein: the valve seat (42) with valve body (41) are equipped with first annular and second annular outward respectively, first sealing ring (51) with second sealing ring (52) are located respectively first annular with in the second annular, and with case lid mouth (11) interference fit.

7. The expansion tank according to claim 1, characterized in that: one part of the cover opening (11) protrudes out of the upper surface of the upper shell (2), the other part of the cover opening extends into the inner space of the expansion tank, and the opening (9) is formed in the part, extending into the inner space of the expansion tank, of the cover opening (11).

8. The expansion tank according to claim 1, characterized in that: the flow channel (8) penetrates from the upper shell (2) to the lower shell (3) downwards and longitudinally and is communicated with the outside of the expansion tank.

9. The expansion tank according to claim 1, characterized in that: the water inlet pipe (6) is connected to the upper shell (2), the water outlet pipe (7) is connected to the lower shell (3), and the connection angle between the water outlet pipe (7) and the water outlet of the lower shell (3) is adjustable.

10. The expansion tank according to claim 1, characterized in that: the inside middle part cavity that is equipped with of expansion tank and locating a plurality of avris cavities around the cavity of middle part, the avris cavity with the cavity of middle part communicates each other through intercommunication groove or intercommunicating pore, case lid mouth (11) are located the top of cavity of middle part, runner (8) are located the side of cavity of middle part.