Dual-seal fire hydrant compression-resistant sealing element

Abstract

The utility model discloses a dual-seal fire hydrant compression-resistant sealing element, and particularly relates to the field of fire hydrants. The utility model provides a double seal fire hydrant compression resistance sealing element, including sealing base, first sealing element, second sealing element, self-adaptation device, the bottom of sealing base is equipped with the accommodation cavity, the first sealing element is provided in the accommodation cavity, the second sealing element is provided below the sealing base, the self-adaptation device is provided with the first sealing element, the second sealing element is provided with the self-adaptation device, and the self-adaptation device is provided with the self-adaptation device. The sealing base is provided with a containing cavity, the second sealing piece is of an annular structure, the second sealing piece is matched with the containing cavity, the self-adaption device is arranged between the second sealing piece and the sealing base, and when the second sealing piece seals the water flow channel, the top of the second sealing piece enters the containing cavity.

Description

Technical Field

[0001] The utility model relates to the field of fire hydrants, in particular to a double-sealed pressure-resistant seal for fire hydrants. Background Art

[0002] The fire hydrant pressure-resistant seal is an important component installed between the fire hydrant body and the fire hydrant valve body to close the fire hydrant water flow channel, ensuring that the fire hydrant can still maintain sealing performance under high-pressure water flow. It is connected to the valve stem of the fire hydrant valve body and drives the valve stem to close the fire hydrant's water flow channel. At present, when the water flow channel of the fire hydrant is closed, the pressure-resistant seal is in contact with the water flow for a long time and is easily eroded by the water flow, resulting in certain damage, which in turn affects the sealing performance of the fire hydrant. Utility Model Content

[0003] The utility model aims to overcome the above technical problems and provide a double-sealed fire hydrant pressure-resistant seal.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a double-sealed fire hydrant pressure-resistant seal, including a sealing base, a first seal, a second seal, and an adaptive device, wherein a accommodating cavity is provided at the bottom of the sealing base, the first seal is arranged in the accommodating cavity, the second seal is arranged below the sealing base, the second seal is in a circular ring structure, the second seal is adapted to the accommodating cavity, the adaptive device is arranged between the second seal and the sealing base, wherein when the second seal closes the water flow channel, the top of the second seal enters the accommodating cavity.

[0005] Furthermore, the adaptive device includes a guiding mechanism and an adaptive mechanism. The guiding mechanism is arranged between the second sealing member and the sealing base. The adaptive mechanism is arranged on the guiding mechanism, and the adaptive mechanism is respectively connected to the sealing base and the second sealing member.

[0006] Furthermore, the guide mechanism includes a guide column and a guide hole, the guide column is arranged on the second sealing member, the guide hole is arranged on the sealing base, and the guide column is installed in the guide hole.

[0007] Furthermore, the adaptive mechanism includes an adaptive spring, which is sleeved on the guide column, one end of the adaptive spring is connected to the sealing base, and the other end of the adaptive spring is connected to the second sealing member.

[0008] Furthermore, the adaptive device also includes a limiting nut, and the limiting nut is arranged on the top of the guide column.

[0009] Furthermore, the adaptive device includes three groups, and the three groups of the adaptive devices are evenly arranged around the central axis of the second sealing member.

[0010] Furthermore, the first sealing member has a hemispherical structure.

[0011] Furthermore, the first sealing member and the second sealing member are made of rubber material.

[0012] From the above description of the utility model, it can be seen that compared with the prior art, the double-sealed fire hydrant pressure-resistant seal provided by the utility model has the following advantages: a sealing base is provided, a accommodating chamber is provided at the bottom of the sealing base, a first seal is provided in the accommodating chamber, a second seal is provided below the sealing base, the second seal is in a circular ring structure, the second seal is adapted to the accommodating chamber, an adaptive device is provided between the second seal and the sealing base, the adaptive device is used to automatically adjust the distance between the second seal and the sealing base so that the force exerted by the sealing base on the second seal is just right, when in use, the first seal first closes the water flow channel of the fire hydrant, and then, the top of the second seal enters the accommodating chamber and cooperates with the side wall of the accommodating chamber to close the water flow channel of the fire hydrant again, thereby achieving a double sealing effect, thereby improving the sealing performance and service life of the fire hydrant. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an exploded view of the double-sealed fire hydrant pressure-resistant seal of the utility model.

[0014] Figure 2 The utility model is a schematic diagram of the overall structure of the double-sealed fire hydrant pressure-resistant seal.

[0015] Figure 3 This is a cross-sectional view of the installation of the double-sealed fire hydrant pressure-resistant seal of the utility model. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present utility model.

[0017] Reference Figure 1-Figure 3As shown, a double-sealed fire hydrant pressure-resistant seal comprises a sealing base 1, a first sealing member 2, a second sealing member 3, and an adaptive device 4. The bottom of the sealing base 1 is provided with a receiving cavity 11, the first sealing member 2 is arranged in the receiving cavity 11, the second sealing member 3 is arranged below the sealing base 1, the second sealing member 3 is annular, the second sealing member 3 is adapted to the receiving cavity 11, the adaptive device 4 is arranged between the second sealing member 3 and the sealing base 1, and the adaptive device 4 is used to automatically adjust the distance between the second sealing member 3 and the sealing base 1, so that the force exerted by the sealing base 1 on the second sealing member 3 is just appropriate. Wherein, when the second sealing member 3 closes the water flow channel of the fire hydrant, the top of the second sealing member 3 enters the receiving cavity 11.

[0018] When in use, the first seal 2 first closes the water flow channel of the fire hydrant, and then the top of the second seal 3 enters the accommodating chamber 11 and cooperates with the side wall of the accommodating chamber 11 to close the water flow channel of the fire hydrant again, achieving a double sealing effect, thereby improving the sealing performance and service life of the fire hydrant.

[0019] The adaptive device 4 includes three groups, and the three groups of adaptive devices 4 are evenly arranged around the central axis of the second sealing member 3. The adaptive device 4 includes a guide mechanism 41 and an adaptive mechanism 42. The guide mechanism 41 is arranged between the second sealing member 3 and the sealing base 1 to guide the second sealing member 3 to move vertically upward or downward, and plays a role of limiting. The adaptive mechanism 42 is arranged on the guide mechanism 41, and the adaptive mechanism 42 is connected to the sealing base 1 and the second sealing member 3 respectively.

[0020] The guide mechanism 41 includes a guide column 411 and a guide hole 412. The guide column 411 is arranged on the second sealing member 3, and the guide hole 412 is arranged on the sealing base 1. The guide column 411 is installed in the guide hole 412, and the guide column 411 can move along the axial direction of the guide hole 412.

[0021] The adaptive mechanism 42 includes an adaptive spring, which is sleeved on the guide column 411 , one end of the adaptive spring is connected to the sealing base 1 , and the other end of the adaptive spring is connected to the second sealing member 3 .

[0022] The self-adaptive device 4 further includes a limiting nut 43 , which is disposed on the top of the guide column 411 , and the limiting nut 43 is threadedly connected to the top of the guide column 411 .

[0023] The first sealing member 2 is in a hemispherical structure.

[0024] The first sealing member 2 and the second sealing member 3 are made of rubber material.

[0025] A guiding structure is provided on the top of the second sealing member 3 , and the guiding structure is used to guide the top of the second sealing member 3 to enter the accommodating cavity 11 .

[0026] The above are only some specific implementation methods of the utility model, but the design concept of the utility model is not limited to this. Any non-substantial changes to the utility model using this concept shall be deemed as an infringement of the protection scope of the utility model.

Claims

1. A double-sealed fire hydrant pressure-resistant seal, characterized in that: It includes a sealing base, a first sealing member, a second sealing member, and an adaptive device. A receiving cavity is provided at the bottom of the sealing base. The first sealing member is arranged in the receiving cavity. The second sealing member is arranged below the sealing base. The second sealing member is in a circular ring structure. The second sealing member is adapted to the receiving cavity. The adaptive device is arranged between the second sealing member and the sealing base. When the second sealing member closes the water flow channel, the top of the second sealing member enters the receiving cavity.

2. The double-sealed fire hydrant pressure-resistant seal according to claim 1, characterized in that: The adaptive device comprises a guiding mechanism and an adaptive mechanism. The guiding mechanism is arranged between the second sealing member and the sealing base. The adaptive mechanism is arranged on the guiding mechanism, and the adaptive mechanism is respectively connected to the sealing base and the second sealing member.

3. The double-sealed fire hydrant pressure-resistant seal according to claim 2, characterized in that: The guiding mechanism comprises a guiding column and a guiding hole. The guiding column is arranged on the second sealing member. The guiding hole is arranged on the sealing base. The guiding column is installed in the guiding hole.

4. The double-sealed fire hydrant pressure-resistant seal according to claim 3, characterized in that: The adaptive mechanism comprises an adaptive spring, which is sleeved on the guide column, one end of the adaptive spring is connected to the sealing base, and the other end of the adaptive spring is connected to the second sealing member.

5. The double-sealed fire hydrant pressure-resistant seal according to claim 4, characterized in that: The self-adaptive device further comprises a limiting nut, and the limiting nut is arranged on the top of the guide column.

6. The double-sealed fire hydrant pressure-resistant seal according to claim 5, characterized in that: The adaptive devices include three groups, and the three groups of adaptive devices are evenly arranged around the central axis of the second sealing member.

7. The double-sealed fire hydrant pressure-resistant seal according to claim 6, characterized in that: The first sealing member is in a hemispherical structure.

8. The double-sealed fire hydrant pressure-resistant seal according to claim 7, characterized in that: The first sealing member and the second sealing member are made of rubber material.

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