CN216519607U - Valve structure for fire hydrant - Google Patents
Valve structure for fire hydrant Download PDFInfo
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- CN216519607U CN216519607U CN202123114017.4U CN202123114017U CN216519607U CN 216519607 U CN216519607 U CN 216519607U CN 202123114017 U CN202123114017 U CN 202123114017U CN 216519607 U CN216519607 U CN 216519607U
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- valve
- sealing
- valve rod
- seat
- clack
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Abstract
A valve structure for a fire hydrant, comprising: the valve seat comprises a long valve rod, a first valve clack and a second valve clack, wherein a first mounting column and a second mounting column are sequentially formed at the bottom of the long valve rod, the first valve clack is sleeved on the first mounting column in a vertically sliding manner and is located below the valve seat and can be in sealing fit with the valve seat, and the second valve clack is fixedly mounted on the second mounting column and can be in sealing fit with the first valve clack. The advantages are that: when opening the valve, push down long valve rod, long valve rod drives the second valve clack earlier and opens, then drives first valve clack and opens, and cracking pressure is little, and the operation is lighter.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a valve structure for a fire hydrant.
Background
The fire hydrant includes the fire hydrant body usually and sets up at this internal valve structure of fire hydrant, and its valve structure includes the valve body usually, the valve rod, the disk seat, the valve clack, the valve rod with be connected the valve clack to be connected with the spring that orders about its upward movement, medium from up the circulation down, when the valve is closed, under the effect of medium pressure and spring, the valve clack keeps sealed with the disk seat, when the valve is opened, pushes down the valve rod for valve clack and disk seat separation, medium alright follow supreme outside blowout down.
However, the water pressure in the fire hydrant is usually high, and the elastic force of the spring is added, so that the valve rod is often pressed down by high pressure, and the operation is difficult when the valve is opened.
Disclosure of Invention
In order to overcome the defects of the background art, the utility model provides a valve structure for a fire hydrant.
The technical scheme adopted by the utility model is as follows: a valve structure for a fire hydrant comprises
The valve body is provided with a fluid passage which is communicated up and down, and a valve rod support frame and a valve seat are arranged in the fluid passage of the valve body;
the long valve rod is arranged on the valve rod supporting frame in a vertically sliding mode, and a first mounting column and a second mounting column are sequentially formed at the bottom of the long valve rod;
a first valve clack which can be sheathed on the first mounting column in a vertically sliding way and is positioned below the valve seat and can be in sealing fit with the valve seat, a flow groove which is communicated with the upper part and the lower part for fluid to pass through is formed on the first valve clack,
a second valve flap; the valve clack is fixedly arranged on the second mounting column and can be in sealing fit with the first valve clack.
The improved check valve is characterized in that a water outlet is formed in the valve rod supporting frame, a connecting seat is installed at the upper end of the long valve rod, a short valve rod is connected onto the connecting seat, and a sealing plug capable of sealing the water outlet is arranged at the bottom of the short valve rod.
The long valve rod overcoat is equipped with first spring, first spring upper end and connecting seat counterbalance provide an ascending elastic force.
The short valve rod is sleeved with a second spring, and the upper end of the second spring is abutted to the connecting seat to provide upward elastic force.
The sealing plug is arranged on the valve rod support frame and is provided with a sealing seat corresponding to the position of the water drainage hole, a flow guide channel communicated with the water drainage hole and the fluid channel is formed on the sealing seat, and the sealing plug extends into the sealing seat and is in sealing fit with the sealing seat.
The valve rod support frame is characterized in that a guide sleeve is installed in the center of the valve rod support frame, and the long valve rod penetrates through the guide sleeve and is in up-and-down sliding fit with the guide sleeve.
The first valve clack is provided with a first sealing ring and a first sealing ring gland, the first sealing ring gland is in threaded fit connection with the first valve clack, and the first sealing ring gland and the first sealing ring are in compression fit through a wedge surface.
A second sealing ring and a second sealing ring gland are arranged on the second valve flap; and the second mounting column is provided with a locking nut, the locking nut is in threaded connection with the second mounting column and is used for fixedly locking the second valve clack, the upper end of the second sealing ring gland is in limit fit with the lower end of the first mounting column, and the lower end of the second sealing ring gland is in compression fit with the second sealing ring through a wedge surface.
The utility model has the beneficial effects that: scheme more than adopting, when opening the valve, with long valve rod pushing down, long valve rod drives the second valve clack earlier and opens, then drives first valve clack and opens, and cracking pressure is little, and the operation is light convenient more.
Drawings
Fig. 1 is a schematic structural diagram of a valve structure according to an embodiment of the present invention when the valve structure is opened.
Fig. 2 is a schematic structural diagram of the long valve rod, the first valve flap and the second valve flap according to the embodiment of the utility model.
Fig. 3 is a schematic structural view of a valve structure according to an embodiment of the present invention when closed.
Detailed Description
The embodiments of the utility model will be further described with reference to the accompanying drawings in which:
as shown in the figure, the valve structure for the fire hydrant comprises a valve body 1, a long valve rod 2, a first valve clack 3 and a second valve clack 4.
The valve body 1 is provided with a fluid passage 11 which is communicated up and down, a valve rod support frame 12 and a valve seat 13 are arranged in the fluid passage 11 of the valve body 1, a water drainage hole 14 is formed in the valve rod support frame 12, an opening at one end of the water drainage hole 14 is communicated with the fluid passage 11, and an opening at the other end of the water drainage hole is positioned on the side wall of the valve body 1 and is communicated with the outside. The valve rod support frame 12 and the valve seat 13 are integrally formed with the valve body 1, a circulation groove is formed in the valve rod support frame 12 to ensure normal circulation of fluid media, the guide sleeve 10 is installed in the middle of the valve rod support frame 12 and used for positioning and installing the long valve rod 2, the valve seat 13 is located below the valve rod support frame 12, and sealing materials are welded at the bottom of the valve seat 13 in a stacking mode to form a valve seat sealing surface.
The first valve clack 3 is sleeved on the first mounting column 21 and can slide up and down along the first mounting column 21, a first sealing ring 31 and a first sealing ring gland 32 are arranged on the first valve clack 3, the first sealing ring gland 32 is in threaded fit with the first valve clack 3 and is in compression fit with the first sealing ring 31 through a wedge surface, and the first sealing ring 31 corresponds to the valve seat sealing surface, so that a reliable sealing effect can be formed when the first sealing ring 31 is tightly attached to the valve seat sealing surface, a flow groove 33 for passing fluid is formed in the first valve clack 3 in an up-and-down conduction mode, and a circle of valve clack sealing surface is formed on the outer ring of the bottom of the first valve clack 3 relative to the flow groove 33.
The second valve flap 4 is sleeved on the second mounting column 22 and fixed on the second mounting column 22 through a locking nut 43, a second sealing ring 41 and a second sealing ring gland 42 are arranged on the second valve flap 4, the locking nut 43 is located below the second valve flap 4 and in threaded connection with the second mounting column 22, the second valve flap 3 can be fixedly locked on the second mounting column 22 by screwing the locking nut 43, the upper end of the second sealing ring gland 42 is in limit fit with the lower end of the first mounting column 21, the lower end of the second sealing ring gland is in compression fit with the second sealing ring 41 through a wedge surface, the second sealing ring 41 corresponds to the valve flap sealing surface, and when the second sealing ring 41 is tightly attached to the valve flap sealing surface, a reliable sealing effect can be formed.
The long valve rod 2 is close to the position of upper end and installs connecting seat 5, be connected with short valve rod 6 on the connecting seat 5, the short valve rod 6 bottom is equipped with sealing plug 7, seal receptacle 9 is installed to the position that valve rod support frame 12 corresponds outlet 14, be formed with the water conservancy diversion passageway that is linked together with outlet 14, fluid passage 11 on the seal receptacle 9, sealing plug 7 stretches into in the seal receptacle 9, can realize sealing to the water conservancy diversion passageway.
In addition, long valve rod 2 overcoat is equipped with first spring 81, short valve rod 6 overcoat is equipped with second spring 82, the upper end of first spring 81, second spring 82 all offsets with connecting seat 5, can provide ascending elastic force.
The above valve structure is used for fire hydrants, which are generally installed on the bottom surface outdoors, and fire water circulates along the fire hydrant from bottom to top.
When the valve is opened, the long valve rod 2 is pressed downwards, and then moves downwards, the long valve rod 2 drives the second valve clack 4 to move downwards firstly, so that the second valve clack is separated from the first valve clack 3, fire water can flow through the flow groove 33 of the first valve clack 3 firstly, and after the shoulder at the bottom of the long valve rod 2 is contacted with the first valve clack 3, the first valve clack 3 is driven to move downwards simultaneously, so that the first valve clack is separated from the valve seat 13, the valve is completely opened, and the fire water can flow through the fluid passage 11 of the valve body 1. In addition, when long valve rod 2 moves down, can drive short valve rod 6 through connecting seat 5 and move down in step, when the valve was opened completely, sealing plug 7 and seal receptacle 9 of short valve rod 6 bottom just in time formed reliable sealed, closed outlet 14, avoided fire water to leak out from outlet 14.
When the valve is closed, the downward pressure on the long valve rod is slowly reduced, the first valve clack 3, the second valve clack 4 and the long valve rod 2 move upwards under the combined action of fire water pressure, the first spring and the second spring, the first valve clack 3 is in contact with the second valve clack 4 to keep sealing, and the second valve clack 4 is in contact with the valve seat 13 to keep sealing, so that the fire water is blocked to prevent the fire water from being sprayed outwards. In addition, when last valve rod 2 rebound, can drive short valve rod 6 through connecting seat 5 and shift up in step, when the valve was closed completely, the sealing plug 7 of short valve rod 6 bottom and the water conservancy diversion passageway phase separation of seal receptacle 9 for outside the unnecessary fire water of first valve clack 3 top can follow discharge opening 14 outflow way valve body 1, further guarantee that first valve clack 3 top pressure is less than its below pressure all the time, under the pressure effect of fire bottom aqueous medium, further guarantee reliably sealed.
Adopt foretell valve structure, its advantage lies in:
1) when the valve is opened, the long valve rod 2 drives the second valve flap 4 to open firstly, then drives the first valve flap 3 to open, the second valve flap 4 is used as a small valve flap, the area is small, and therefore the pressure required during opening is smaller, after the second valve flap 4 is opened, fire water can firstly circulate through the circulation groove 33 of the first valve flap 3, so that the medium pressure downwards is formed above the first valve flap 3, therefore, when the first valve flap 3 is continuously opened, the required pressure is lower at night, and therefore the valve opening pressure is small, and the operation is easier and more convenient.
2) Set up the outlet 14, through the synchronization action of short valve rod 6 and long valve rod 2, can close outlet 14 when the valve is opened, open outlet 14 when the valve is closed, avoid the fluid passage 11 of first valve clack 3 top to remain fire water, not only can further reduce the top pressure of first valve clack 3, guarantee first valve clack 3, second valve clack 4 has sufficient sealed specific pressure, ensure reliable sealing, discharge unnecessary fire water moreover, can avoid under the low temperature environment winter, the condition of freezing the valve appears.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The skilled person should understand that: although the present invention has been described in terms of the above embodiments, the inventive concepts are not limited to the embodiments, and any modifications that utilize the inventive concepts are intended to be included within the scope of the appended claims.
Claims (8)
1. A valve structure for a fire hydrant, characterized in that: comprises that
The valve comprises a valve body (1), a valve rod support frame (12) and a valve seat (13) are arranged in the fluid passage (11) of the valve body (1);
the long valve rod (2) is installed on the valve rod support frame (12) in a vertically sliding mode, and a first installation column (21) and a second installation column (22) are sequentially formed at the bottom of the long valve rod (2);
a first valve clack (3) which is sleeved on the first mounting column (21) in a vertically sliding manner and is positioned below the valve seat and can be in sealing fit with the valve seat (13), a flow groove (33) which is communicated up and down and is used for fluid to pass through is formed on the first valve clack (3),
a second valve flap (4); the valve is fixedly arranged on the second mounting column (22) and can be in sealing fit with the first valve clack (3).
2. A valve structure for a fire hydrant according to claim 1, wherein: the novel valve rod is characterized in that a water drainage hole (14) is formed in the valve rod support frame (12), the connecting seat (5) is installed at the upper end of the long valve rod (2), the short valve rod (6) is connected onto the connecting seat (5), and the bottom of the short valve rod (6) is provided with a sealing plug (7) capable of sealing the water drainage hole (14).
3. A valve structure for a fire hydrant according to claim 2, wherein: the long valve rod (2) overcoat is equipped with first spring (81), first spring (81) upper end offsets with connecting seat (5), provides an ascending elastic force.
4. A valve structure for a fire hydrant according to claim 2, wherein: the short valve rod (6) is sleeved with a second spring (82), the upper end of the second spring (82) is abutted against the connecting seat (5) to provide an upward elastic force.
5. A valve structure for a fire hydrant according to claim 2, wherein: the valve rod support frame (12) is provided with a sealing seat (9) corresponding to the position of the drain hole (14), a flow guide channel communicated with the drain hole (14) and the fluid channel (11) is formed on the sealing seat (9), and the sealing plug (7) extends into the sealing seat (9) and is in sealing fit with the sealing seat.
6. A valve structure for a fire hydrant according to claim 1, wherein: the valve rod support frame (12) central point puts and installs uide bushing (10), long valve rod (2) pass uide bushing (10) and with its upper and lower sliding fit.
7. A valve structure for a fire hydrant according to claim 1, wherein: be equipped with first sealing washer (31), first sealing washer gland (32) on first valve clack (3), first sealing washer gland (32) are connected with first valve clack (3) screw-thread fit, compress tightly the cooperation through the scarf between first sealing washer gland (32) and first sealing washer (31).
8. A valve structure for a fire hydrant according to claim 1, wherein: a second sealing ring (41) and a second sealing ring gland (42) are arranged on the second valve flap (4); install lock nut (43) on second erection column (22), lock nut (43) and second erection column (22) threaded connection and fixed locking second valve clack (4), spacing cooperation of second sealing washer gland (42) upper end and first erection column (21) lower extreme, lower extreme and second sealing washer (41) are through scarf press fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123114017.4U CN216519607U (en) | 2021-12-13 | 2021-12-13 | Valve structure for fire hydrant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123114017.4U CN216519607U (en) | 2021-12-13 | 2021-12-13 | Valve structure for fire hydrant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216519607U true CN216519607U (en) | 2022-05-13 |
Family
ID=81469982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123114017.4U Active CN216519607U (en) | 2021-12-13 | 2021-12-13 | Valve structure for fire hydrant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216519607U (en) |
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2021
- 2021-12-13 CN CN202123114017.4U patent/CN216519607U/en active Active
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