External degassing structure of expansion water tank

Abstract

The utility model discloses an external degassing structure of an expansion water tank, which relates to the field of degassing of expansion water tanks, and comprises an expansion water tank, the bottom end of the expansion water tank is connected with a connecting pipe, the connecting pipe is connected with a water tank, and the top of the expansion water tank is fixedly provided with a threaded head. The inner wall of the threaded head communicates with the inner wall of the expansion water tank, the outer wall of the threaded head is in threaded connection with a threaded cover, a handle protruding upwards is integrally formed at the top of the threaded cover, a degassing mechanism is installed in the handle, and a dustproof mechanism is arranged at the top of the handle. And the dustproof mechanism is used for preventing dust or impurities from entering the expansion water tank under the condition that the degassing mechanism is opened. By arranging the dustproof mechanism, dust and impurities accumulated on the degassing mechanism can be prevented from entering the expansion water tank through the opened degassing mechanism when the degassing mechanism is opened.

Description

Technical Field

[0001] The utility model relates to the field of degassing of expansion water tanks, and particularly to an external degassing structure for an expansion water tank. Background Technique

[0002] The expansion water tank is connected to the water tank through a pipeline. After the liquid in the water tank is heated and expanded, it enters the expansion water tank through the pipeline.

[0003] In the prior art, a degassing structure is generally arranged on the expansion water tank. When the internal pressure in the expansion water tank increases, the gas can be discharged. However, during the gas discharge process, some dust or impurities accumulated at the top of the degassing structure will enter the expansion water tank through the opened degassing structure. When the water tank sucks the liquid in the expansion water tank back again, the impurities will enter the water tank, which will cause blockage in the water tank over time. Content of the Utility Model

[0004] The purpose of the utility model is to provide an external degassing structure for an expansion water tank to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an external degassing structure for an expansion water tank, including an expansion water tank. A connecting pipe is connected to the bottom end of the expansion water tank, and the connecting pipe is connected to the water tank. A threaded head is fixedly installed at the top of the expansion water tank, and the inner wall of the threaded head is communicated with the inner wall of the expansion water tank. The outer wall of the threaded head is threadedly connected with a threaded cover. The top of the threaded cover is integrally formed with an upward protruding handle. An air removal mechanism is installed inside the handle, and a dust prevention mechanism is arranged at the top of the handle.

[0006] The dust prevention mechanism is used to prevent dust or impurities from entering the interior of the expansion water tank when the air removal mechanism is opened.

[0007] As a further scheme of the utility model: the air removal mechanism includes a movable groove opened inside the handle. A lower connection hole is opened below the movable groove inside the handle, and an upper connection hole is opened above the movable groove inside the handle. The upper connection hole and the lower connection hole are both communicated with the inner wall of the movable groove. The top end of the upper connection hole is communicated with the outside, and the bottom end of the lower connection hole is communicated with the inner cavity of the threaded head.

[0008] As a further scheme of the utility model: the air removal mechanism further includes a lower sealing plate that is slidably connected up and down to the inner wall of the movable groove. The top of the lower sealing plate is integrally formed with an upward protruding column. The top of the column is integrally formed with an upper sealing plate that covers the top of the upper connection hole. A spring is fixedly connected between the top end of the lower sealing plate and the top end of the inner wall of the movable groove.

[0009] As a further solution of the present utility model: The dust-proof mechanism includes a dust-proof cover integrally formed on the outer periphery of the upper sealing plate. The dust-proof mechanism further includes a connecting ring integrally formed at the top end of the handle. The inner periphery of the connecting ring is fitted with the outer periphery of the dust-proof cover. A plurality of exhaust holes are circumferentially and equidistantly formed inside the connecting ring. One end of the exhaust hole penetrates to the outside of the connecting ring, and the other end of the exhaust hole penetrates to the inner periphery of the connecting ring.

[0010] As a further solution of the present utility model: The top cross-section of the dust-proof cover is in an obtuse angle structure.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] 1. By providing the dust-proof mechanism, it is possible to prevent dust and impurities accumulated on the degassing mechanism from entering the expansion water tank through the opened degassing mechanism when the degassing mechanism is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural view of the present utility model;

[0014] Figure 2 is a schematic internal structural view of the present utility model;

[0015] Figure 3 is for the present utility model Figure 2 partial enlarged view at A in.

[0016] In the figure: 1. Expansion water tank; 2. Connecting pipe; 3. Exhaust hole; 4. Threaded head; 5. Threaded cap; 6. Handle; 7. Movable groove; 8. Lower connection hole; 9. Upper connection hole; 10. Lower sealing plate; 11. Spring; 12. Column; 13. Upper sealing plate; 14. Connecting ring; 15. Dust-proof cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1 to 3, in the embodiment of the present utility model, an external degassing structure for an expansion tank includes an expansion tank 1. A connecting pipe 2 is connected to the bottom end of the expansion tank 1, and the connecting pipe 2 is connected to the water tank. A threaded head 4 is fixedly installed at the top of the expansion tank 1, and the inner wall of the threaded head 4 is communicated with the inner wall of the expansion tank 1. The outer wall of the threaded head 4 is threadedly connected with a threaded cover 5. A handle 6 protruding upward is integrally formed at the top of the threaded cover 5. A degassing mechanism is installed inside the handle 6, and a dust-proof mechanism is arranged at the top of the handle 6; the dust-proof mechanism is used to prevent dust or impurities from entering the inside of the expansion tank 1 when the degassing mechanism is opened.

[0019] In this embodiment: The liquid in the water tank expands when heated and enters the expansion tank 1 through the connecting pipe 2. The gas entering the water tank 1 accumulates in the expansion tank 1, and the air pressure in the expansion tank 1 increases. When the threshold is reached, the air pressure acts on the bottom end of the degassing mechanism, the degassing mechanism opens, and the gas in the expansion tank 1 is output outward. At the same time, the dust-proof mechanism can prevent dust or impurities from entering the expansion tank when the degassing mechanism is opened.

[0020] Please refer specifically to Figure 2 and Figure 3 , the degassing mechanism includes a movable groove 7 opened inside the handle 6. A lower connecting hole 8 is opened below the movable groove 7 inside the handle 6. An upper connecting hole 9 is opened above the movable groove 7 inside the handle 6. Both the upper connecting hole 9 and the lower connecting hole 8 are communicated with the inner wall of the movable groove 7. The top end of the upper connecting hole 9 is communicated with the outside, and the bottom end of the lower connecting hole 8 is communicated with the inner cavity of the threaded head 4. The degassing mechanism further includes a lower sealing plate 10 slidably connected up and down to the inner wall of the movable groove 7. A column 12 protruding upward is integrally formed at the top of the lower sealing plate 10. An upper sealing plate 13 covering the top of the upper connecting hole 9 is integrally formed at the top of the column 12. A spring 11 is fixedly connected between the top end of the lower sealing plate 10 and the top end of the inner wall of the movable groove 7.

[0021] In this embodiment: When the air pressure in the expansion tank 1 reaches the threshold, the air pressure acts on the bottom end of the lower sealing plate 10, and the lower sealing plate 10 is pushed to move upward by the force. The upward moving column 12 synchronously pushes the upper sealing plate 13 to move upward. At this time, the gas enters the movable groove 7 through the lower connecting hole 8, and then is discharged through the movable groove 7 and the upper connecting hole 9, thereby realizing the degassing function;

[0022] It should be noted that: Sealing rings for improving the sealing effect are provided at the bottom ends of both the upper sealing plate 13 and the lower sealing plate 10.

[0023] Please refer specifically to Figure 2 and Figure 3, the dust-proof mechanism includes a dust-proof cover 15 integrally formed on the outer periphery of the upper sealing plate 13. The dust-proof mechanism further includes a connecting ring 14 integrally formed on the top end of the handle 6. The inner periphery of the connecting ring 14 is fitted with the outer periphery of the dust-proof cover 15. A plurality of exhaust holes 3 are circumferentially and equidistantly formed in the inner circumference of the connecting ring 14. One end of the exhaust hole 3 penetrates to the outside of the connecting ring 14, and the other end of the exhaust hole 3 penetrates to the inner circumference of the connecting ring 14.

[0024] In this embodiment: while the upper sealing plate 13 moves upward, the upper sealing plate 13 drives the dust-proof cover 15 to move upward synchronously. At this time, the dust-proof cover 15 is displaced from the exhaust hole 3, and the gas is discharged through the exhaust hole 3. While the dust-proof cover 15 moves upward, the dust and impurities accumulated on the top of the dust-proof cover 15 also move upward and will not enter the expansion water tank 1 through the opened degassing mechanism.

[0025] Please refer specifically to Figure 3 , the top cross-section of the dust-proof cover 15 is of an obtuse angle structure.

[0026] In this embodiment: this design method can make the dust and impurities accumulate at a non-edge position of the dust-proof cover 15, which is convenient for regular cleaning.

[0027] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An expansion water tank external degassing structure, comprising an expansion water tank (1), wherein the bottom end of the expansion water tank (1) is connected to a connecting pipe (2), wherein the connecting pipe (2) is connected to the water tank, and wherein: A threaded head (4) is fixedly mounted on the top of the expansion water tank (1); the inner wall of the threaded head (4) is connected to the inner wall of the expansion water tank (1); a threaded cover (5) is threadedly connected to the outer wall of the threaded head (4); a handle (6) protruding upward is integrally formed on the top of the threaded cover (5); a degassing mechanism is mounted inside the handle (6); and a dustproof mechanism is arranged on the top of the handle (6); The dust prevention mechanism is used to prevent dust or impurities from entering the interior of the expansion water tank (1) when the degassing mechanism is opened; The degassing mechanism comprises a movable groove (7) formed inside the handle (6); a lower connecting hole (8) is formed inside the handle (6) below the movable groove (7); an upper connecting hole (9) is formed inside the handle (6) above the movable groove (7); the upper connecting hole (9) and the lower connecting hole (8) are both connected to the inner wall of the movable groove (7); the top end of the upper connecting hole (9) is connected to the outside; and the bottom end of the lower connecting hole (8) is connected to the inner cavity of the threaded head (4); The degassing mechanism also includes a lower sealing plate (10) slidably connected to the inner wall of the movable groove (7) in an upward direction, the top of the lower sealing plate (10) is integrally formed with a column (12) protruding upward, the top of the column (12) is integrally formed with an upper sealing plate (13) for covering the top of the upper connecting hole (9), and a spring (11) is fixedly connected between the top of the lower sealing plate (10) and the top of the inner wall of the movable groove (7).

2. The external degassing structure of an expansion water tank according to claim 1, characterized in that: The dustproof mechanism comprises a dustproof cover (15) integrally formed on the outer periphery of the upper sealing plate (13), and the dustproof mechanism also comprises a connecting ring (14) integrally formed on the top of the handle (6), the inner periphery of the connecting ring (14) coincides with the outer periphery of the dustproof cover (15), and the inner periphery of the connecting ring (14) is provided with a plurality of exhaust holes (3) equidistantly arranged in the circumferential direction of the inside of the connecting ring (14), one end of the exhaust hole (3) penetrates to the outside of the connecting ring (14), and the other end of the exhaust hole (3) penetrates to the inner periphery of the connecting ring (14).

3. The external degassing structure of the expansion tank according to claim 2, characterized in that: The top cross section of the dust cover (15) is an obtuse-angle structure.

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