Expansion box with improved sealing structure

Abstract

The expansion box with the improved sealing structure comprises a box body with an opening in the top face, a cover body is installed on the top of the box body, a liquid injection opening made of a beryllium copper mold is formed in the cover body, the liquid injection opening is in a straight cylinder shape, a valve deck is installed in the liquid injection opening in a sealed mode, and a sealing ring is arranged between the valve deck and the liquid injection opening. The design of pattern draft of the liquid injection port is canceled, the matching consistency of the valve cover and the liquid injection port is ensured, the sealing ring can well plug the mounting gap between the valve cover and the liquid injection port when the valve cover is matched with the liquid injection ports with different depths, the consistent sealing effect is kept, meanwhile, the manufacturing tolerance of the liquid injection port is ensured, the standardization and generalization of the valve cover are effectively promoted, and the production cost is reduced. The surface of the beryllium copper mold is provided with a light ring, the friction force between the beryllium copper mold and the liquid injection opening is small, the heat dissipation effect is good, the roundness of the inner diameter of the liquid injection opening is guaranteed, and the demolding requirement of the liquid injection opening without pattern draft is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to an expansion tank, especially an expansion tank with improved sealing structure. BACKGROUND

[0002] The expansion tank is also called an expansion water tank, which is a device for liquid volume compensation to prevent the pipe from being broken due to thermal expansion and cold contraction. The expansion tank is provided with a liquid injection port. A valve cover is sealingly installed in the liquid injection port. The liquid injection port generally has a manufacturing tolerance. In order to facilitate the demolding of the expansion tank, a 1° demolding slope is generally provided on the liquid injection port. This will result in that the tolerance of the liquid injection port cannot be guaranteed. In addition, the valve cover is a standard general part. The depths of the liquid injection ports of different expansion tanks are different. This results in that the torques for installing the valve covers are different, the sealing positions of the valve covers and the liquid injection ports are different, and the sealing effect is insufficient. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the utility model provides an expansion tank with improved sealing structure.

[0004] The utility model adopts the technical scheme that:

[0005] An expansion tank with improved sealing structure comprises a tank body with an open top. A cover body is installed on the top of the tank body. A liquid injection port made of beryllium copper mold is arranged on the cover body. The liquid injection port is a straight cylinder. A valve cover is sealingly installed in the liquid injection port. A sealing ring is arranged between the valve cover and the liquid injection port.

[0006] The manufacturing tolerance of the liquid injection port is ±0.1 mm. The roundness of the liquid injection port is 0.14 mm.

[0007] A water outlet pipe is arranged on the bottom of the tank body. An exhaust pipe is arranged on the cover body.

[0008] The utility model has the advantages that: the cover body is installed on the top of the tank body. A liquid injection port made of beryllium copper mold is arranged on the cover body. The liquid injection port is a straight cylinder. A valve cover is sealingly installed in the liquid injection port. The demolding slope design of the liquid injection port is cancelled. The consistency of the valve cover and the liquid injection port is guaranteed. The sealing ring can better block the installation gap between the valve cover and the liquid injection port. The sealing effect is consistent. The manufacturing tolerance of the liquid injection port is guaranteed. The standardization and generalization of the valve cover are effectively promoted. The waste of repeated development and verification is reduced. The surface of the beryllium copper mold is smooth. The friction between the liquid injection port and the beryllium copper mold is small. The demolding requirement of the liquid injection port without demolding slope is guaranteed. The heat dissipation effect is good. The roundness of the inner diameter of the liquid injection port and the demolding requirement of the liquid injection port without demolding slope are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0009] The utility model is further illustrated below in combination with the drawings and embodiments.

[0010] Fig. 1 is the structure diagram of the utility model;

[0011] Fig. 2 is the structure diagram of the cover body;

[0012] Fig. 3 is the cooperation schematic diagram of beryllium copper and the cover body. DETAILED DESCRIPTION

[0013] Referring to Figs. 1-3 , an expansion tank with improved sealing structure comprises a tank body 1 with an open top, a cover body 2 is installed on the top of the tank body 1, a liquid injection port 3 made of beryllium copper mold is arranged on the cover body 2, the liquid injection port 3 is straight cylindrical (i.e. the overall inner diameter is consistent), a valve cover 4 is sealingly installed in the liquid injection port 3, a sealing ring is arranged between the valve cover 4 and the liquid injection port 3, the draft design of the liquid injection port is cancelled, the consistency of the valve cover and the liquid injection port is ensured, the liquid injection port with different depths is matched, the sealing ring can better block the installation gap between the valve cover 4 and the liquid injection port 3, the consistent sealing effect is maintained, the sealing property and durability reliability of the liquid injection port of the expansion tank are improved, the manufacturing tolerance of the liquid injection port is ensured, the standardization and generalization of the valve cover are effectively promoted, the waste of repeated development verification is reduced, the surface of the beryllium copper mold is smooth, the friction between the liquid injection port is small, the demolding requirement of the liquid injection port without draft is ensured, the heat dissipation effect is good, the roundness of the inner diameter of the liquid injection port and the demolding requirement of the liquid injection port without draft are ensured.

[0014] In the application, the manufacturing mold as a whole is made of conventional mold material, and only the liquid injection port 3 is made of beryllium copper material (as shown in A in Fig. 3 , on the one hand, the service life and quality of the mold itself are ensured, and on the other hand, the manufacturing cost is avoided to be too high.

[0015] The beryllium copper material has good heat dissipation effect, compared with conventional materials, the roundness of the liquid injection port 3 can be better ensured, so that the sealing effect is improved.

[0016] The manufacturing tolerance of the liquid injection port 3 is ±0.1mm, and the roundness of the liquid injection port 3 is 0.14mm, the reasonable manufacturing tolerance can improve the reliability and durability of the product on the one hand, and on the other hand, a certain size fluctuation is allowed, which makes the processing process more flexible, the efficiency of batch production is improved and the manufacturing cost is reduced under the premise of ensuring the sealing effect between the valve cover 4 and the liquid injection port 3.

[0017] The upper end of the liquid injection port 3 is provided with a chamfer structure, which facilitates the installation of the valve cover 4 and plays a guiding role.

[0018] The bottom of the box 1 is provided with a water outlet pipe 5, and the cover 2 is provided with an exhaust pipe 6. When the liquid temperature rises, the liquid will expand and may produce water vapor and other gases. The exhaust pipe 6 can exhaust these gases from the system, prevent the system pressure from being too high, and avoid system component damage, such as radiator rupture, water pipe joint loosening, etc.

[0019] The installation position of the exhaust pipe 6 should be higher than the lowest liquid level in the expansion tank to avoid a large amount of liquid flowing out, and the outlet is inclined downward to ensure smooth gas exhaust and reduce the possibility of foreign matter entering the system.

Claims

1. An expansion tank for improving the sealing of the structure, comprising a tank (1) open on the top, characterized in that The top of the box (1) is provided with a cover (2), the cover (2) is provided with a liquid injection port (3) made of beryllium copper mold, the liquid injection port (3) is straight cylindrical, a valve cover (4) is sealingly installed in the liquid injection port (3), and a sealing ring is arranged between the valve cover (4) and the liquid injection port (3).

2. The inflation chamber for improving a seal structure according to claim 1, characterized by The manufacturing tolerance of the liquid injection port (3) is ±0.1mm.

3. The inflation chamber for improving a seal structure according to claim 1, wherein The roundness of the liquid injection port (3) is 0.14mm.

4. The inflation chamber for improved seal structure of claim 1, wherein The bottom of the box (1) is provided with a water outlet pipe (5).

5. The inflation chamber for improved seal structure of claim 1, wherein The cover (2) is provided with an exhaust pipe (6).

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