Water inlet sealing structure of anti-explosion valve

Abstract

The water inlet sealing structure of the anti-explosion valve comprises a shell and a water inlet end cover, a water passing inner cavity used for installing an anti-explosion assembly is formed in the shell, and the water inlet end cover is connected to a water inlet of the water passing inner cavity in a threaded mode; an external thread section is formed on the periphery of the water inlet of the shell, the water inlet end cover extends out of the water inlet of the water passing inner cavity to form an installation section, and a sealing ring is installed on the outer wall of the installation section. Therefore, according to the water inlet sealing structure of the anti-explosion valve, the sealing ring is installed on the installation section extending into the water inlet of the water passing inner cavity, and the thickness of the installation section can be set according to needs without being limited by threads. Therefore, the strength of the position where the sealing ring is located is guaranteed, and the risk of sealing failure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion-proof valve, specifically relates to a water inlet sealing structure of explosion-proof valve. BACKGROUND

[0002] The explosion-proof valve is installed between the angle valve (valve body) and the water supply pipeline interface, and is used for automatically and timely plugging water when the angle valve is broken, so as to avoid water flooding loss caused by not timely discovery. Therefore, the sealing of the water inlet side of the explosion-proof valve is very important. In order to facilitate installation, a threaded detachable water inlet end cover is developed on the water inlet side of the explosion-proof valve. However, the explosion-proof shell is provided with internal threads, and the sealing ring groove is arranged at the position of the internal threads. The structural strength is relatively thin, and there is a risk of sealing failure caused by the fracture of the sealing ring groove.

[0003] Therefore, the present application is produced in view of the above-mentioned defects in the prior art. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to provide a water inlet sealing structure of explosion-proof valve, which has the characteristics of improving the sealing safety of the water inlet side of the explosion-proof valve and reducing the risk of sealing failure.

[0005] In order to achieve the above-mentioned purpose, the solution of the utility model is as follows:

[0006] A water inlet sealing structure of explosion-proof valve, comprising a shell and a water inlet end cover, the shell has a water passing inner cavity for installing an explosion-proof assembly, and the water inlet end cover is threadedly connected to the water inlet of the water passing inner cavity; an outer thread section is formed on the outer periphery of the water inlet of the shell, the water inlet end cover extends out of the water inlet of the water passing inner cavity to form a mounting section, and a sealing ring is mounted on the outer wall of the mounting section.

[0007] Further, the sealing ring abuts on the end face of the outer thread section towards the water inlet direction.

[0008] Further, a first outer thread is arranged on the water inlet end cover, a first inner thread is arranged in the water passing inner cavity, and the first outer thread and the first inner thread are connected; the outer diameter of the mounting section is greater than the large diameter of the first outer thread.

[0009] Further, an installation groove for mounting the sealing ring is formed on the mounting section.

[0010] Further, a wrench hole and a water passing grid are arranged in sequence on the water inlet end cover from the water flow direction; when the water passes normally, the explosion-proof assembly abuts on the water passing grid.

[0011] Further, the diameter of the circumscribed circle of the wrench hole is less than the small diameter of the first outer thread.

[0012] Further, the wrench hole is a hexagonal wrench hole.

[0013] Further, the side of the outer thread segment away from the sealing ring is provided with a sealing gasket.

[0014] With the above structure, the water inlet sealing structure of the explosion-proof valve has at least the following beneficial effects:

[0015] I. By installing the sealing ring on the mounting segment extending into the water inlet of the water passing inner cavity, the thickness of the mounting segment can be set as needed without being limited by the thread. In this way, the strength of the position of the sealing ring is ensured, and the risk of sealing failure is reduced.

[0016] II. Preferably, the outer diameter of the mounting segment is greater than the diameter of the first inner thread, and the diameter of the circumscribed circle of the wrench hole is smaller than the small diameter of the first outer thread. Therefore, the mounting segment has sufficient wall thickness to ensure strength.

[0017] Compared with the prior art, the installation position of the sealing ring is improved, and the sealing ring is installed on the mounting segment of the outer wall of the water inlet end cover outside the shell. The installation is very stable, and the risk of water leakage is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a cross-sectional structure schematic view of the water inlet sealing structure of the explosion-proof valve.

[0019] Figure 2 is a cross-sectional structure schematic view of the separation of the sealing ring and the mounting segment.

[0020] Figure 3 is a three-dimensional structure schematic view of the explosion-proof valve.

[0021] Figure 4 is another angle of the exploded structure schematic view of the explosion-proof valve.

[0022] Figure 5 is an exploded structure schematic view of the explosion-proof valve.

[0023] In the drawings:

[0024] Shell 1; water passing inner cavity 11; first inner thread 111; outer thread segment 12; water inlet end cover 2; first outer thread 21; mounting segment 22; wrench hole 23; water passing grille 24; sealing ring 3; sealing gasket 4; explosion-proof assembly 5; movable core 51; spring 52. DETAILED DESCRIPTION

[0025] In order to further explain the technical scheme of the utility model, the utility model will be described in detail below through specific embodiments.

[0026] AsFigures 1 to 5 As shown, it is a kind of water inlet sealing structure of explosion-proof valve, including shell 1 and water inlet end cover 2, the shell 1 in there is for installing the water passage inner cavity 11 of explosion-proof assembly 5, the water inlet end cover 2 is screwed in the water inlet of the water passage inner cavity 11;The shell 1 is formed with the outer thread section 12 at the outer periphery of water inlet, the water inlet end cover 2 is formed with the installation section 22 in the water inlet of the water passage inner cavity 11, the installation section 22 outer wall is installed with sealing ring 3.

[0027] In this way, a kind of water inlet sealing structure of explosion-proof valve, by sealing ring 3 is installed on the installation section 22 of water inlet in the water passage inner cavity 11, the thickness of installation section 22 can be set according to need, and will not be limited by thread.So it ensures the strength of the position of sealing ring 3, reduces the risk of sealing failure.

[0028] Preferably, the sealing ring 3 is abutted on the end face of the outer thread section 12 towards water inlet direction.The water inlet end cover 2 is provided with first outer thread 21, the water passage inner cavity 11 is provided with first inner thread 111, the first outer thread 21 and first inner thread 111 are connected;The outer diameter of the installation section 22 is greater than the major diameter of the first outer thread 21.The circumscribed circle diameter of the spanner hole is less than the minor diameter of the first outer thread 21.By the outer diameter of installation section 22 is greater than the diameter of first inner thread 111, and the circumscribed circle diameter of the spanner hole is less than the minor diameter of the first outer thread 21.Thereby, installation section 22 has sufficient wall thickness to ensure strength.

[0029] Preferably, the installation section 22 is formed with installation groove for installing sealing ring 3.The installation groove plays the role of auxiliary limiting sealing ring 3.Avoid sealing ring 3 slip.

[0030] Preferably, the water inlet end cover 2 is provided with spanner hole 23 and water passage grille 24 in sequence from water flow direction;When normal water passes, the explosion-proof assembly 5 is abutted on water passage grille 24.The explosion-proof assembly 5 includes movable core 51 and spring 52, the movable core 51 can block and open the water passage hole on the water outlet side of the water passage inner cavity 11 of shell 1 along with water pressure change.

[0031] Preferably, the spanner hole is hexagonal spanner hole, which facilitates installation or disassembly using hexagonal spanner.

[0032] Preferably, the outer thread section 12 is provided with sealing pad 4 on the side away from sealing ring 3, and the sealing pad 4 is used for sealing connection with the water inlet pipe end face of water valve such as angle valve and faucet.

[0033] Compared with the prior art, the sealing ring 3 is installed on the mounting section 22 of the outer wall of the water inlet end cover 2 outside the shell 1, the installation is very stable, and the risk of water leakage is reduced.

[0034] The above-mentioned embodiments and drawings are not limited to the product shape and style of the utility model, and any ordinary skilled person in the art can make appropriate changes or modifications, which should be considered as not departing from the patent category of the utility model.

Claims

1. A water inlet seal structure of an explosion-proof valve, characterized by comprising: The shell has a water passing inner cavity for installing an explosion-proof assembly, and a water inlet cover is threadedly connected to a water inlet of the water passing inner cavity; an outer thread section is formed on the periphery of the water inlet of the shell, and the water inlet cover extends from the water inlet of the water passing inner cavity to form a mounting section, and a sealing ring is mounted on the outer wall of the mounting section.

2. The water inlet sealing structure of an explosion-proof valve according to claim 1, wherein The sealing ring abuts against an end face of the outer thread section in the water inlet direction.

3. The water inlet sealing structure of the explosion-proof valve according to claim 1, characterized in that, A first outer thread is arranged on the water inlet cover, a first inner thread is arranged in the water passing inner cavity, and the first outer thread and the first inner thread are connected; the outer diameter of the mounting section is greater than the large diameter of the first outer thread.

4. A water inlet sealing structure of an explosion-proof valve according to any one of claims 1 to 3, wherein A mounting groove for mounting the sealing ring is formed on the mounting section.

5. The water inlet sealing structure of an explosion-proof valve according to claim 3, wherein A wrench hole and a water passing grid are arranged in sequence on the water inlet cover in the water flow direction; in normal water passing, the explosion-proof assembly abuts against the water passing grid.

6. The water inlet sealing structure of an explosion-proof valve according to claim 5, wherein The diameter of the circumscribed circle of the wrench hole is less than the small diameter of the first outer thread.

7. The water inlet sealing structure of an explosion-proof valve according to claim 5, wherein The wrench hole is a hexagonal wrench hole.

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