CN213479267U - Special double-seal diaphragm valve for fire-fighting system - Google Patents
Special double-seal diaphragm valve for fire-fighting system Download PDFInfo
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- CN213479267U CN213479267U CN202022278952.3U CN202022278952U CN213479267U CN 213479267 U CN213479267 U CN 213479267U CN 202022278952 U CN202022278952 U CN 202022278952U CN 213479267 U CN213479267 U CN 213479267U
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Abstract
A double-seal diaphragm valve special for a fire protection system is characterized in that an annular diaphragm edge sealing groove (7) is formed in a valve body (1) at the edge of a mounting opening, the middle of the inside of the valve body (1) is protruded upwards, a concave diaphragm core sealing groove (8) is formed in the top end of the protruded upwards, the outer edge of the bottom surface of a diaphragm (2) is in compression joint with the diaphragm edge sealing groove (7) through the outer edge of the bottom end of a valve cover (4), a mounting cavity is formed in the middle of the bottom end of the valve cover (4), a valve rod (5) is inserted into the mounting cavity through the upper port of the valve cover (4) and is sleeved with a valve disc (3), and the lower end of the valve rod (5; the upper end of the valve rod (5) is provided with a hand wheel (6). The sealing function can be continuously realized under the condition that the diaphragm sheet is damaged by changing the sealing mode of the traditional diaphragm valve. Has the functions of opening, closing and limiting and state display. The pressure drop of the inlet and the outlet is small, the generation of turbulent flow is avoided, and the switch operation is ideal. The valve is acid-resistant, alkali-resistant, free of leakage, easy to disinfect, free of contamination and convenient to maintain.
Description
Technical Field
The utility model relates to a carry the switch-on of medium or cut the institutional advancement technique of diaphragm valve equipment among the boats and ships fire extinguishing system, especially a special double containment diaphragm valve of fire extinguishing system.
Background
The manual diaphragm valve is a novel valve with a tail valve and a disinfection function, and is a straight-through stop valve driven by hand or a hand wheel. Two typical configurations of diaphragm valves are the straight-through configuration and the weir configuration. The closing element is not wetted by the process medium, and is therefore suitable for use in corrosive process media, which pass straight or approximately straight through the valve body.
Diaphragm valves can also be operated throttled, using conditions similar to pinch valves, in vinyl slurries, process materials or solids-containing fluids. However, at the bottom of the valve chamber, there is sometimes material deposition that can cause corrosion at the bottom of the valve body.
The weir type diaphragm valve and the straight line pass type diaphragm valve have similar structures except for the valve body and the diaphragm. Because the diaphragm can be made of a stronger material, the valve body can also be used in high pressure conditions. The straight line passes through the diaphragm valve with the bottom wall of the valve body almost parallel to the flow so that the flow passes through the valve unimpeded.
In the application of the prior art, the diaphragm valve of the traditional fire-fighting system is slightly poor in sealing reliability and maintainability.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a special double containment diaphragm valve of fire extinguishing system, it is not enough to overcome prior art, and provides a valve body double-seal structure, reaches the purpose that improves diaphragm valve sealing performance and increase of service maintenance phase.
The purpose of the utility model is realized by the following technical measures: a dual-seal diaphragm valve special for a fire-fighting system comprises a valve body, a diaphragm sheet, a valve disc, a valve cover, a valve rod and a hand wheel; the two sides of the lower part of the valve body are symmetrically provided with a material inlet and a material outlet, the middle part of the upper side of the valve body is provided with a mounting opening, and the material inlet, the material outlet and the mounting opening are communicated with a valve cavity in the valve body; the valve body at the edge of the mounting opening is provided with an annular membrane edge sealing groove, the middle part in the valve body is protruded upwards, the top end of the protruded part is provided with a downward membrane core sealing groove, the outer edge of the bottom surface of the diaphragm is pressed on the membrane edge sealing groove through the outer edge of the bottom end of the valve cover, the middle part of the bottom end of the valve cover is protruded upwards to form a mounting cavity, the valve rod is inserted into the mounting cavity from the upper port of the valve cover and is sleeved with the valve disk, and the lower end of the valve rod extends out of; the upper end of the valve rod is provided with a hand wheel.
Especially, the installing port of valve body sets up the spiro union hole downwards along last, and the valve body is connected through the spiro union hole to the valve gap bottom.
In particular, the valve disk bottom surface is in the shape of a spherical crown.
In particular, the valve disc, valve cap, valve stem, hand wheel are coaxial with the seal groove of the film core.
In particular, the inner diameter of the film core sealing groove is slightly larger than the outer diameter of the lower end of the valve rod, and the groove opening of the film core sealing groove is inclined.
In particular, the mounting cavity height is greater than the valve disc height.
Particularly, a supporting rod is vertically arranged on the opening edge at the top end of the valve cover, a limiting ring is connected to the supporting rod, and the limiting ring is sleeved on the valve rod.
Particularly, the upper part of the valve disc and the lower section of the valve rod are provided with pin holes and positioning pins correspondingly.
The utility model discloses an advantage and effect: the sealing function can be continuously realized under the condition that the diaphragm sheet is damaged by changing the sealing mode of the traditional diaphragm valve. Has the functions of opening, closing and limiting and state display. The pressure drop of the inlet and the outlet is small, the generation of turbulent flow is avoided, and the switch operation is ideal. The valve is acid-resistant, alkali-resistant, free of leakage, easy to disinfect, free of contamination and convenient to maintain.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
The reference numerals include:
the valve comprises a valve body 1, a diaphragm 2, a valve disc 3, a valve cover 4, a valve rod 5, a hand wheel 6, a membrane edge sealing groove 7, a membrane core sealing groove 8, a limiting ring 9, a support rod 10 and a positioning pin 11.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Example 1: as shown in attached figure 1, the dual-seal diaphragm valve special for the fire-fighting system comprises a valve body 1, a diaphragm 2, a valve disc 3, a valve cover 4, a valve rod 5 and a hand wheel 6; a material inlet and a material outlet are symmetrically formed in two sides of the lower part of the valve body 1, a mounting opening is formed in the middle of the upper side of the valve body 1, and the material inlet, the material outlet and the mounting opening are communicated with a valve cavity in the valve body 1; an annular membrane edge sealing groove 7 is formed in the valve body 1 at the edge of the mounting opening, the middle of the inside of the valve body 1 protrudes upwards, a concave membrane core sealing groove 8 is formed in the top end of the protruding part, the outer edge of the bottom surface of the diaphragm 2 is in compression joint with the membrane edge sealing groove 7 through the outer edge of the bottom end of the valve cover 4, a mounting cavity is protruded in the middle of the bottom end of the valve cover 4, the valve rod 5 is inserted into the mounting cavity from the upper port of the valve cover 4 and is sleeved with the valve disk 3, and the lower end of the valve rod 5 extends out of the bottom; the upper end of the valve rod 5 is provided with a hand wheel 6.
In the foregoing, the installing port of valve body 1 sets up the spiro union hole along last downwards, and valve body 1 is connected through the spiro union hole in valve gap 4 bottom.
In the above, the bottom surface of the valve disc 3 is in the shape of a spherical crown.
In the foregoing, the valve disc 3, the valve cap 4, the valve rod 5, and the hand wheel 6 are coaxial with the film core sealing groove 8.
In the foregoing, the inner diameter of the film core seal groove 8 is slightly larger than the outer diameter of the lower end of the valve rod 5, and the opening of the film core seal groove 8 is inclined.
In the foregoing, the mounting chamber height is greater than the valve disc 3 height.
In the foregoing, the top port of the valve cap 4 is vertically provided with the support rod 10, the support rod 10 is connected with the limit ring 9, and the limit ring 9 is sleeved on the valve rod 5.
In the above, the upper part of the valve disc 3 and the lower part of the valve rod 5 are provided with pin holes and are provided with positioning pins 11.
In the embodiment of the utility model provides an in, adopt the drive of hand wheel 6. A groove matched with the diaphragm 2 is additionally arranged on the valve body 1 to jointly form a double-sealing structure, the valve body 1 is made of stainless steel for a precision casting and polishing straight-through dead-angle-free channel, and the diaphragm 2 is made of EPDM diaphragm material.
In the embodiment of the utility model, the mark is opened, closed or throttle reference position on valve body 1 or valve gap 4.
In the embodiment of the utility model, the membrane edge sealing groove 7 and the membrane core sealing groove 8 form a two-way sealing structure, the valve cover 4 presses the edge of the diaphragm 2 on the membrane edge sealing groove 7, and simultaneously, the lower end of the valve rod 5 is pressed into the membrane core sealing groove 8, so that the middle part of the bottom surface of the diaphragm 2 can be pressed on the edge of the membrane core sealing groove 8; and balancing the fluid load of the static pressure joint structure of the edge of the diaphragm 2 and the bottom end edge of the valve cover 4 and the dynamic working part of the pressure joint of the middle part of the diaphragm 2 and the lower end of the valve rod 5.
The embodiment of the utility model provides an in, can be through moving spacing ring 9 from top to bottom along bracing piece 10 for 6 rotatory lift in-process of hand wheel, control valve rod 5, hand wheel 6 move the stroke.
The embodiment of the utility model provides an in, rotatory hand wheel 6 makes valve rod 5 drive 3 decline of valve discs and compress diaphragm 2 downwards, begins to promote diaphragm 2 to the membrane core seal groove 8 at valve body 1 internal valve chamber middle part. In the throttled state, the hand wheel 6 is rotated to a desired flow rate and then stays there. When the valve disc 3 is pressed down to reach the maximum pressure in the closed state of the diaphragm valve, the two surfaces of the bottom surface of the valve disc 3 and the top surface of the diaphragm 2 reach the maximum binding surfaces, and tight sealing can be formed. When the diaphragm valve is opened, the rotation action of the hand wheel 6 is opposite, and the valve cavity flow area is enlarged after the valve disc 3 and the diaphragm 2 are lifted. Finally, in the fully open position, the compressor valve disk 3 and the diaphragm 2 are completely retracted into the valve cover 4, and the diaphragm 2 is returned to the upward convex relief flow path. In this case, the diaphragm valve reaches a maximum capacity.
Claims (8)
1. The dual-seal diaphragm valve special for the fire-fighting system comprises a valve body (1), a diaphragm sheet (2), a valve disc (3), a valve cover (4), a valve rod (5) and a hand wheel (6); the valve is characterized in that a material inlet and a material outlet are symmetrically formed in two sides of the lower part of the valve body (1), a mounting opening is formed in the middle of the upper side of the valve body (1), and the material inlet, the material outlet and the mounting opening are communicated with a valve cavity in the valve body (1); an annular membrane edge sealing groove (7) is formed in the valve body (1) at the edge of the mounting opening, the middle of the interior of the valve body (1) is protruded upwards, a concave membrane core sealing groove (8) is formed in the top end of the protruded upwards, the outer edge of the bottom surface of the diaphragm (2) is in compression joint with the membrane edge sealing groove (7) through the outer edge of the bottom end of the valve cover (4), a mounting cavity is formed in the middle of the bottom end of the valve cover (4), the valve rod (5) is inserted into the mounting cavity from the upper port of the valve cover (4) and is sleeved with the valve disc (3), and the lower end of the valve rod (5) extends out of the bottom surface of the; the upper end of the valve rod (5) is provided with a hand wheel (6).
2. The dual-seal diaphragm valve for fire fighting system according to claim 1, wherein the mounting port of the valve body (1) is provided with a screw hole upward and downward, and the bottom end of the valve cover (4) is connected to the valve body (1) through the screw hole.
3. The dual seal diaphragm valve for fire fighting system special use according to claim 1, wherein the valve disc (3) has a spherical crown shape in a bottom surface.
4. The dual-seal diaphragm valve special for the fire fighting system according to claim 1, wherein the valve disc (3), the valve cap (4), the valve rod (5), and the hand wheel (6) are coaxial with the diaphragm seal groove (8).
5. The dual seal diaphragm valve for fire fighting system special use according to claim 1, wherein the inner diameter of the diaphragm core seal groove (8) is slightly larger than the outer diameter of the lower end of the valve stem (5), and the mouth of the diaphragm core seal groove (8) is inclined.
6. The dual seal diaphragm valve for fire fighting system special use according to claim 1, wherein the mounting chamber height is greater than the valve disc (3) height.
7. The dual-seal diaphragm valve special for the fire fighting system according to claim 1, wherein a support rod (10) is vertically installed on the top end edge of the valve cover (4), a limit ring (9) is connected to the support rod (10), and the limit ring (9) is sleeved on the valve rod (5).
8. The dual-seal diaphragm valve special for the fire fighting system according to claim 1, wherein the upper portion of the valve disc (3) and the lower portion of the valve rod (5) are provided with pin holes and positioning pins (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022278952.3U CN213479267U (en) | 2020-10-13 | 2020-10-13 | Special double-seal diaphragm valve for fire-fighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022278952.3U CN213479267U (en) | 2020-10-13 | 2020-10-13 | Special double-seal diaphragm valve for fire-fighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213479267U true CN213479267U (en) | 2021-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022278952.3U Active CN213479267U (en) | 2020-10-13 | 2020-10-13 | Special double-seal diaphragm valve for fire-fighting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213479267U (en) |
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2020
- 2020-10-13 CN CN202022278952.3U patent/CN213479267U/en active Active
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