A water tank cover

Abstract

This utility model discloses a water tank cover, including a valve seat, a support, and a top cover. The lower end of the valve seat has a vertically extending channel, and the middle side wall of the valve seat has a through hole for connecting the channel. A step is located in the middle of the valve seat, and a first sealing gasket is placed on the step. A valve core located below the support is pressed on the top of the first sealing gasket. A first spring is installed between the valve core and the support. The upper end of the valve core has a first convex ring and multiple through holes, which communicate with the through hole. The first convex ring is located outside the through holes. A valve stem extends vertically through the valve core. A base is fixed to the lower end of the valve stem. A second sealing gasket is engaged between the top of the base and the bottom of the first convex ring. A second spring is installed between the middle of the valve stem and the top of the valve core. A sleeve is located at the lower end of the support, and a positioning ring is fixed to the outer side of the upper end of the valve stem. The outer wall of the positioning ring slides vertically with the inner wall of the sleeve. This utility model provides additional support for the valve stem by fixing a positioning ring to the outer side of the upper end of the valve stem.

Description

Technical Field

[0001] This utility model relates to an automotive accessory, specifically a water tank cap. Background Technology

[0002] The radiator cap (also known as the radiator cover or pressure cap) is a key component of the automotive cooling system. Installed on top of the radiator, its main function is to seal the radiator and regulate system pressure. It directly affects the coolant's circulation efficiency, boiling point, and the overall stability of the cooling system. During operation, when the cooling system pressure exceeds a set value due to temperature rise, the main valve releases excess pressure, and steam overflows from the main radiator and is transported to the auxiliary radiator. The auxiliary radiator, with its lower internal temperature, cools the steam and collects it as liquid. When the engine is cold, the main radiator temperature drops, and the coolant in the auxiliary radiator flows back to the main radiator through a one-way valve inside the radiator cap. The one-way valve consists of a valve stem, a spring, a sealing gasket, and a base. The valve stem is fixed to the base, and the spring supports the valve stem. During operation, the valve stem can move up and down. However, lacking other components for support and relying solely on the spring, the valve stem is prone to tilting during movement. This tilting also causes the base to tilt, preventing it from effectively pressing the sealing gasket and resulting in an unreliable one-way valve seal. Utility Model Content

[0003] In view of the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a water tank cover.

[0004] The technical solution of this utility model is: a water tank cover, including a valve seat, a support fixed to the inner side of the upper end of the valve seat, and an upper cover fixed to the outer side of the upper end of the valve seat. A first sealing ring is fitted on the outer wall of the middle part of the valve seat, and a second sealing ring is fitted on the outer wall of the lower end of the valve seat. The lower end of the valve seat has a channel extending vertically. A through hole for connecting the channel is provided on the side wall of the middle part of the valve seat. A step is provided in the middle of the valve seat, and a first sealing gasket is placed on the step. A valve core located below the support is pressed on the top of the first sealing gasket. The valve core and the support are... A first spring extending vertically is installed between the valve core and the valve stem. The upper end of the valve core has a first convex ring and multiple through holes, which are connected to the through holes. The first convex ring is located outside the through holes. A valve stem extends vertically through the valve core. A base is fixed at the lower end of the valve stem. A second sealing gasket is inserted between the top of the base and the bottom of the first convex ring. A second spring extending vertically is installed between the middle of the valve stem and the top of the valve core. The lower end of the support has a circular collar. A positioning ring is fixed on the outer side of the upper end of the valve stem. The outer wall of the positioning ring slides vertically with the inner wall of the collar.

[0005] Furthermore, the valve core has a second convex ring at the bottom, which presses against the top of the first sealing gasket.

[0006] Furthermore, when the valve core moves upward, the second convex ring of the valve core separates from the first sealing gasket, and the channel connects to the through hole.

[0007] Furthermore, the valve core has a through hole running vertically through its center, through which the valve stem passes, and a second spring is fitted around the valve stem.

[0008] Furthermore, when the valve stem moves downward, the base moves downward, the second sealing gasket moves downward, and the through hole connects with the channel.

[0009] The beneficial effects of the water tank cover provided by this utility model are as follows: by fixing a positioning ring on the outer side of the upper end of the valve stem and making the outer wall of the positioning ring slide and cooperate with the inner wall of the collar at the lower end of the support, additional support is provided for the valve stem, effectively preventing the valve stem from tilting during the up and down movement, and improving the stability of the valve stem movement. Due to the enhanced stability of the valve stem, the base can remain stable during the movement, thereby effectively squeezing the second sealing gasket, so that the second sealing gasket effectively contacts the first convex ring of the valve core, resulting in a good sealing effect. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a cross-sectional view of the present invention;

[0012] Figure 3 This is a schematic diagram of the valve seat structure of this utility model;

[0013] Figure 4 This is a schematic diagram of the valve core of this utility model.

[0014] As shown in the figure: 1—valve seat, 1.1—channel, 1.2—through hole, 1.3—step, 2—support, 21—ring, 3—top cover, 4—first sealing ring, 5—second sealing ring, 6—first sealing gasket, 7—valve core, 71—first convex ring, 72—through hole, 73—second convex ring, 74—perforation, 8—first spring, 9—valve stem, 10—base, 11—second sealing gasket, 12—second spring, 13—positioning ring. Detailed Implementation

[0015] To provide a more intuitive and complete understanding of the technical solution of this utility model, the following non-limiting features are described in conjunction with the accompanying drawings:

[0016] like Figure 1 — Figure 4As shown, a water tank cover includes a valve seat 1, a support 2 fixed to the inner side of the upper end of the valve seat 1, and an upper cover 3 fixed to the outer side of the upper end of the valve seat 1. A first sealing ring 4 is fitted on the outer wall of the middle part of the valve seat 1, and a second sealing ring 5 is fitted on the outer wall of the lower end of the valve seat 1. The lower end of the valve seat 1 has a vertically extending channel 1.1. A through hole 1.2 for connecting the channel 1.1 is provided on the side wall of the middle part of the valve seat 1. A step 1.3 is provided in the middle part of the valve seat 1. A first sealing gasket 6 is placed on the step 1.3. A valve core 7 located below the support 2 is pressed on the top of the first sealing gasket 6. A vertically extending channel 5 is installed between the valve core 7 and the support 2. The first spring 8, the upper end of the valve core 7 has a first convex ring 71 and multiple through holes 72, the through holes 72 are connected to the through holes 1.2, the first convex ring 71 is located outside the through holes 72, a valve stem 9 extends vertically through the valve core 7, a base 10 is fixed at the lower end of the valve stem 9, a second sealing gasket 11 is locked between the top of the base 10 and the bottom of the first convex ring 71, a second spring 12 extending vertically is installed between the middle of the valve stem 9 and the top of the valve core 7, the lower end of the support 2 has a circular collar 21, a positioning ring 13 is fixed on the outer side of the upper end of the valve stem 9, the outer wall of the positioning ring 13 slides vertically with the inner wall of the collar 21.

[0017] like Figure 2 , Figure 4 As shown, the valve core 7 has a second protruding ring 73 at its bottom, which presses against the top of the first sealing gasket 6. When the second protruding ring 73 of the valve core 7 presses against the first sealing gasket 6, the channel 1.1 is not connected to the through hole 1.2. When the main water tank temperature is low, the second protruding ring 73 of the valve core 7 will remain pressed against the first sealing gasket 6, and the valve core 7 will not move upward. When the main water tank temperature rises, steam overflows from the main water tank, the pressure in the channel 1.1 increases, pushing the valve core 7 upward. The first spring 8 is compressed, and after the valve core 7 moves upward, the second protruding ring 73 of the valve core 7 separates from the first sealing gasket 6. The channel 1.1 then connects to the through hole 1.2, and the steam is transported to the auxiliary water tank through the through hole 1.2.

[0018] like Figure 2 , Figure 4 As shown, the valve core 7 has a through hole 74 running vertically through its center. The valve stem 9 passes through the through hole 74, and the second spring 12 is sleeved on the outside of the valve stem 9. Because the first convex ring 71 is located outside the through hole 72, when the second sealing gasket 11 presses against the first convex ring 71 of the valve core 7, the through hole 72 is not connected to the channel 1.1. When the valve stem 9 moves downward, the base 10 moves downward, the second sealing gasket 11 moves downward, and the through hole 72 connects with the channel 1.1. After the car is cold, the temperature of the main water tank drops, and the coolant in the auxiliary water tank flows back. The coolant flows into the valve seat 1 through the through hole 1.2 and into the through hole 72 of the valve core 7. The coolant presses the second sealing gasket 11 downward, separating the second sealing gasket 11 from the first convex ring 71 of the valve core 7. The coolant enters the channel 1.1 and finally enters the main water tank.

[0019] like Figure 2 As shown, the lower section of the first spring 8 is fitted over the valve core 7, while the upper section of the first spring 8 is fitted over the collar 21. This makes the installation of the first spring 8 more stable, and the first spring 8 is less likely to tilt when it extends or retracts, so that the valve core 7 can move more smoothly up and down.

[0020] The water tank cover provided by this utility model provides additional support for the valve stem 9 by fixing a positioning ring 13 to the outer side of the upper end of the valve stem 9 and making the outer wall of the positioning ring 13 slide and engage with the inner wall of the collar 21 at the lower end of the support 2. This effectively prevents the valve stem 9 from tilting during its up-and-down movement and improves the stability of the valve stem 9's movement. Due to the enhanced stability of the valve stem 9, the base 10 can remain stable during movement, thereby effectively squeezing the second sealing gasket 11 and making the second sealing gasket 11 effectively contact the first convex ring 71 of the valve core 7, resulting in a good sealing effect.

[0021] Of course, the above are only preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any simple modifications and equivalent structural changes made based on the contents of the present utility model specification and drawings should also be included within the patent protection scope of the present utility model.

Claims

1. A water tank cover, comprising a valve seat, a support fixed to the inner side of the upper end of the valve seat, and an upper cover fixed to the outer side of the upper end of the valve seat, wherein a first sealing ring is fitted on the outer wall of the middle portion of the valve seat, a second sealing ring is fitted on the outer wall of the lower end of the valve seat, the lower end of the valve seat has a vertically extending channel, a through hole for connecting the channel is provided on the side wall of the middle portion of the valve seat, a step is provided in the middle of the valve seat, a first sealing gasket is placed on the step, a valve core located below the support is pressed on the top of the first sealing gasket, and a vertically extending first spring is installed between the valve core and the support, characterized in that: The upper end of the valve core has a first convex ring and multiple through holes, which are connected to the through holes. The first convex ring is located outside the through holes. A valve stem extends vertically through the valve core. A base is fixed at the lower end of the valve stem. A second sealing gasket is clamped between the top of the base and the bottom of the first convex ring. A second spring extending vertically is installed between the middle of the valve stem and the top of the valve core. The lower end of the support has a circular collar. A positioning ring is fixed on the outer side of the upper end of the valve stem. The outer wall of the positioning ring slides vertically with the inner wall of the collar.

2. A water tank cover according to claim 1, characterized in that: The valve core has a second protruding ring at the bottom, which presses against the top of the first sealing gasket.

3. A water tank cover according to claim 2, characterized in that: When the valve core moves upward, the second convex ring of the valve core separates from the first sealing gasket, and the channel connects to the through hole.

4. A water tank cover according to claim 1, characterized in that: The valve core has a through hole running vertically through its center. The valve stem passes through the through hole, and the second spring is sleeved on the outside of the valve stem.

5. A water tank cover according to claim 4, characterized in that: When the valve stem moves downward, the base moves downward, the second sealing gasket moves downward, and the through hole connects with the channel.

Images