CN220930212U - Valve for fire hydrant - Google Patents
Valve for fire hydrant Download PDFInfo
- Publication number
- CN220930212U CN220930212U CN202322272338.XU CN202322272338U CN220930212U CN 220930212 U CN220930212 U CN 220930212U CN 202322272338 U CN202322272338 U CN 202322272338U CN 220930212 U CN220930212 U CN 220930212U
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- CN
- China
- Prior art keywords
- valve
- seat
- valve rod
- packing
- core
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 230000007704 transition Effects 0.000 claims abstract description 9
- 238000012856 packing Methods 0.000 claims description 48
- 238000003825 pressing Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000003792 electrolyte Substances 0.000 description 2
- 239000003349 gelling agent Substances 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The utility model discloses a valve for a hydrant, which comprises a valve body, wherein the valve body comprises an internal medium flow channel, an inlet flange, an outlet flange, a valve seat and a valve rod seat; the valve rod seat is detachably and fixedly arranged on the valve body; the movable assembly comprises a valve core, a valve rod and a hand wheel; the valve rod is in threaded connection with the valve rod seat, a hand wheel is fixedly arranged at the upper end of the valve rod seat, and a valve core is connected at the lower end of the valve rod seat; the lower surface of the valve is a sphere and is in arc transition with the side surface of the valve, and the inner surface of the valve seat is a sphere; the outer surface of the valve core contacts with the outer surface of the valve seat to intercept the internal medium flow passage, and the lower surface of the valve core is set to be spherical and is in circular arc transition with the side surface of the valve core, so that the inner surface of the valve seat is spherical; the valve core is smoothly embedded into the valve seat through the spherical structure of the lower surface of the valve core, and the spherical surface and the circular arc transition surface of the valve core are in line contact with the spherical surface of the valve seat, so that under the same valve rod downward pressure, the contact surface of the valve core and the valve seat obtains larger sealing pressure, and reliable and higher sealing performance can be obtained.
Description
Technical Field
The utility model relates in particular to a valve for a fire hydrant.
Background
The fire hydrant is mainly used for a fire engine to take water from a municipal water supply pipe network or an outdoor fire water supply pipe network to extinguish fire, and can be directly connected with a water hose and a water gun to extinguish fire when water is discharged, so that the indoor and outdoor fire hydrant system is also one of important fire facilities for extinguishing fire. The valve is a component part of the fire hydrant, and because of the special use environment of the fire hydrant, the valve has higher requirements on long-term sealing performance and reliability.
Disclosure of Invention
The utility model aims to provide a valve for a fire hydrant, which aims to solve the technical problems in the background technology.
In order to solve the technical problems, the aim of the utility model is realized as follows:
a valve for a fire hydrant, comprising
The valve body comprises an internal medium flow channel, an inlet flange, an outlet flange, a valve seat and a valve rod seat; the valve rod seat is detachably and fixedly arranged on the valve body;
The movable assembly comprises a valve core, a valve rod and a hand wheel; the valve rod is in threaded connection with the valve rod seat, the hand wheel is fixedly arranged at the upper end of the valve rod seat, and the valve core is connected at the lower end of the valve rod seat; the lower surface of the valve is spherical and is in arc transition with the side surface of the valve, and the inner surface of the valve seat is spherical; the outer surface of the valve core contacts with the outer surface of the valve seat to intercept the internal medium flow passage.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the valve rod seat is provided with a packing cavity, the packing cavity is filled with sealing packing, the sealing packing is in contact with the inner surfaces of the valve rod and the packing cavity, and a packing pressing plate is pressed into the cavity from an upper opening of the packing cavity to compress the sealing packing.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: and after the packing pressing plate is connected with the valve rod seat through a bolt and compresses the sealing packing, a gap is reserved between the lower end face of the packing pressing plate and the upper end face of the packing cavity.
The above-mentioned scheme is based on and is a preferable scheme of the above-mentioned scheme: the upper end of the valve core is provided with a containing groove; the outer peripheral surface of the valve rod close to the lower end is provided with a ring groove, and a limit check ring is embedded in the ring groove; still include spacing pressure disk, spacing pressure disk set firmly in the storage tank top, with spacing retaining ring restriction in the storage tank.
Compared with the prior art, the utility model has the following outstanding and beneficial technical effects: the lower surface of the valve core is set to be spherical and is in arc transition with the side surface of the valve core, and the inner surface of the valve seat is spherical; the outer surface of the valve core is contacted with the outer surface of the valve seat to intercept the internal medium flow passage, so that the valve core is smoothly embedded into the valve seat through the spherical surface structure of the lower surface of the valve core, and a sealing surface similar to line contact is formed by the spherical surface of the valve core and the circular arc transition surface and the spherical surface of the valve seat, so that under the same valve rod downward pressure, larger sealing pressure can be obtained on the contact surface of the valve core and the valve seat, and thus, reliable and higher sealing performance can be obtained; meanwhile, a packing cavity is arranged on the valve rod seat, so that good sealing is obtained between the valve rod and the valve rod seat in a mode of packing and arranging a sealing gland for pressing, and leakage is avoided; in addition, the valve rod seat and the valve body adopt a detachable fixed connection mode, so that the upper end of the valve body is provided with a larger opening, and the valve seat in the valve body is easier to process.
Drawings
FIG. 1 is a schematic view of the overall structure of the present utility model;
Fig. 2 is a partial enlarged view at a in fig. 1.
Description of the embodiments
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings in the embodiments, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, based on the examples given, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the application.
In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.
In the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
It should be noted that, the terms "electrolyte" and "gelling agent" are all existing materials in the art and are conventionally used materials, and the above technical features are not the utility model points of the present utility model, so the components of the "electrolyte" and "gelling agent" are not described in detail.
A valve for a fire hydrant, comprising
The valve body 10, the valve body 10 includes the internal medium runner 11, import flange 12, exit flange 13, valve seat 14 and valve stem seat 15, import flange 12 and exit flange 13 have entrance 121 and exit 131 separately, connect in the hydrant through import flange 12, exit flange 13; the valve rod seat 15 is detachably and fixedly arranged on the valve body 10; the valve rod seat 15 adopts detachable fixed connection mode with the valve body 10 to make the upper end of valve body 10 obtain a great opening 10a, like this carry out finish machining to the disk seat 14 in the valve body 10 more easily, improve the machining precision of disk seat 14, reduce the processing degree of difficulty, thereby more do benefit to the shaping and the surface accuracy of disk seat, thereby do benefit to the later stage and improve the leakproofness.
The movable assembly 20 comprises a valve core 21, a valve rod 22 and a hand wheel 23; the valve rod 22 is in threaded connection with the valve rod seat 15, a hand wheel 23 is fixedly arranged at the upper end, and a valve core 21 is connected at the lower end; preferably, the valve rod seat 15 is provided with an internal threaded hole 152, the upper section of the valve rod 22 is provided with external threads matched with the threaded hole 152, the valve rod 22 is in threaded connection with the threaded hole, and the valve rod 22 is driven to rotate by rotating the hand wheel, so that the valve rod 22 vertically moves up and down, and the valve core is driven to move up and down. Further preferably, the lower surface of the valve core 21 is spherical and is in circular arc transition with the side surface of the valve core, and the inner surface of the valve seat 14 is spherical; the outer surface of the valve body 21 contacts the outer surface of the valve seat 14 to intercept the internal medium flow passage 11. The valve seat 14 is smoothly embedded into the valve seat 14 through the spherical structure of the lower surface of the valve core 21, and a sealing surface similar to line contact is formed by the spherical surface of the valve core 21 and the circular arc transition surface 211 and the spherical surface of the valve seat 14, so that under the same valve rod downward pressure, larger sealing pressure can be obtained on the contact surface of the valve core and the valve seat, and reliable and high sealing performance can be obtained. In order to enable the valve rod to flexibly rotate so as to avoid abrasion of the valve core and the valve seat, the upper end of the valve core 21 is preferably provided with a containing groove 212 in the embodiment; the outer peripheral surface of the valve rod 22 adjacent to the lower end is provided with a ring groove 221, and the ring groove 221 is internally embedded with a limit retainer ring 25; still include spacing pressure disk 24, spacing pressure disk 24 sets firmly in the storage tank 212 top, restricts spacing retaining ring 25 in storage tank 212 to can realize driving the case and reciprocate at the smooth rotation of valve rod through this mode, carry out opening and closing of valve.
Further, in order to improve the tightness between the valve rod and the valve rod seat, in this embodiment, the valve rod seat 15 is preferably provided with a packing cavity 151, the packing cavity 151 is filled with a sealing packing 17, the sealing packing 17 contacts with the valve rod 22 and the inner surface of the packing cavity 151, and a packing platen 16 is pressed into the cavity from the upper opening of the packing cavity 151 to compress the sealing packing 17. The packing cavity is arranged on the valve rod seat, and good sealing is achieved between the valve rod and the valve rod seat in a mode of packing and arranging the sealing gland for pressing, so that leakage of the valve rod is avoided. In addition, it is further preferable that after the packing platen 16 is connected with the valve rod seat 15 through bolts and compresses the sealing packing 17, a gap is formed between the lower end face of the packing platen 16 and the upper end face of the packing cavity 151, so that when the sealing performance is reduced due to abrasion of the valve rod and the packing after the later-stage valve is used for a certain time, the abrasion loss of the sealing packing and the valve rod can be compensated by continuously screwing the bolts to drive the packing platen 16 to further compress the packing, the valve can be used for a long time, the replacement maintenance frequency of the sealing piece is reduced, and the valve is more suitable for long-term reliable use of the hydrant. In addition, the cross section of the packing cavity 151 is preferably in a conical surface structure, and the lower end of the packing pressing disc 16 is also in a conical surface structure, so that packing can be more fully pressed and tightly contacted with the valve rod for sealing when the packing pressing cover 16 is pressed.
The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model in this way, therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.
Claims (4)
1. A valve for a fire hydrant, characterized in that: comprising
A valve body (10), the valve body (10) comprising an internal media flow passage (11), an inlet flange (12), an outlet flange (13), a valve seat (14) and a valve stem seat (15); the valve rod seat (15) is detachably and fixedly arranged on the valve body (10);
The movable assembly (20) comprises a valve core (21), a valve rod (22) and a hand wheel (23); the valve rod (22) is in threaded connection with the valve rod seat (15), the hand wheel (23) is fixedly arranged at the upper end, and the valve core (21) is connected at the lower end; the lower surface of the valve core (21) is a spherical surface and is in circular arc transition with the side surface of the valve core, and the inner surface of the valve seat (14) is a spherical surface; the outer surface of the valve core (21) is in contact with the outer surface of the valve seat (14) to intercept the internal medium flow passage (11).
2. A valve for a fire hydrant according to claim 1, wherein: the valve rod seat (15) is provided with a packing cavity (151), the packing cavity (151) is internally filled with sealing packing (17), the sealing packing (17) is contacted with the valve rod (22) and the inner surface of the packing cavity (151), and a packing pressing plate (16) is pressed into the cavity from an upper opening of the packing cavity (151) to compress the sealing packing (17).
3. A valve for a fire hydrant according to claim 2, wherein: after the packing pressing plate (16) is connected with the valve rod seat (15) through bolts and compresses the sealing packing (17), a gap is reserved between the lower end face of the packing pressing plate (16) and the upper end face of the packing cavity (151).
4. A valve for a fire hydrant according to claim 1, wherein: the upper end of the valve core (21) is provided with a containing groove (212); an annular groove (221) is formed in the peripheral surface, close to the lower end, of the valve rod (22), and a limit check ring (25) is embedded in the annular groove (221); still include spacing pressure disk (24), spacing pressure disk (24) set firmly in accommodation groove (212) top, will spacing retaining ring (25) limit in accommodation groove (212).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272338.XU CN220930212U (en) | 2023-08-23 | 2023-08-23 | Valve for fire hydrant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322272338.XU CN220930212U (en) | 2023-08-23 | 2023-08-23 | Valve for fire hydrant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220930212U true CN220930212U (en) | 2024-05-10 |
Family
ID=90933325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322272338.XU Active CN220930212U (en) | 2023-08-23 | 2023-08-23 | Valve for fire hydrant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220930212U (en) |
-
2023
- 2023-08-23 CN CN202322272338.XU patent/CN220930212U/en active Active
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| GR01 | Patent grant |