CN202834348U - Valve membrane damage-alarming device - Google Patents
Valve membrane damage-alarming device Download PDFInfo
- Publication number
- CN202834348U CN202834348U CN201220436644.1U CN201220436644U CN202834348U CN 202834348 U CN202834348 U CN 202834348U CN 201220436644 U CN201220436644 U CN 201220436644U CN 202834348 U CN202834348 U CN 202834348U
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- China
- Prior art keywords
- valve
- valve body
- piston
- alarming device
- cylinder barrel
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Abstract
The utility model relates to a valve membrane damage-alarming device which comprises a valve body and a transmitting rod matched with the valve body in a slide mode. The valve body is provided with a stepped-shaped inner bore. The midcourse of the valve body is a cylinder barrel. The outer diameter of the lower segment is provided with a connecting thread. The surface of the upper end is provided with a valve deck. The valve deck is provided with a center bore and an air circulating hole. The transmitting rod comprises a shaft rod connected with the center bore in a slide-fit mode and a piston which forms a whole with the shaft rod and is connected with the cylinder barrel in a slide-fit mode. The piston divides the inner cavity of the valve body into an upper cavity and a lower cavity. The piston is provided with balance springs in the upper and lower portion. The valve membrane damage-alarming device can send out alarm signals in time when the membrane is damaged and even so the medium does not escape, thus the valve membrane damage-alarming device can be applied to occasions where medium-escape is forbidden, such as pipe network for transporting oil or occasions near the electrical equipment.
Description
Technical field
The utility model relates to a kind of valve, relates in particular to a kind of valve diaphragm damage alarming device.
Background technique
In the valve that uses liquid medium, often adopt diaphragm structure, its Main Function is, when diaphragm upper and lower cavity pressure reduction surpasses or is lower than setting value, act on the power disequilibrium on the diaphragm, thereby the band ovable valve stem moves up and down, and valve port is opened greatly or is turned down, to adjust the size of mouth pressure or flow.Compare with piston structure, it is simple in structure, be active in one's movements, but the life-span is shorter.Because whether diaphragm arrangement is damaged in the using process in the Inner chamber of valve, the user is unknown.Therefore, because damaging, diaphragm causes De Shi so often occur.
Summary of the invention
The utility model main purpose is: solve the existing deficiency of prior art, thereby develop a kind of warning device that can find that the valve diaphragm damages.
Another purpose of the present utility model is: after the spring chamber sealing of reduction valve is done suitably to improve, the reduction valve of this warning device has been installed applicable to the occasion that does not allow medium to leak.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: a kind of valve diaphragm damage alarming device is characterized in that: the bar of posting a letter that has valve body and join with the valve body cunning;
Described valve body has step-like endoporus, and its stage casing is cylinder barrel, and the external diameter of hypomere hollow shaft is provided with connecting thread, and the upper end is provided with valve gap, and described valve gap is provided with center hole and air stream through hole;
The described bar of posting a letter comprise the axostylus axostyle of joining with the bonnet central bore cunning and with axostylus axostyle one and the piston of joining with the cylinder barrel cunning; Piston is divided into epicoele and cavity of resorption to the inner chamber of valve body;
The upper and lower balance spring that is provided with of described piston.
The technical solution of the utility model can also be further perfect:
As preferably, described balance spring comprises the pit bottom surface of valve gap and the lower spring between the upper spring between the piston upper-end surface and piston lower surface and the cylinder barrel bottom surface.
As preferably, described piston external diameter is provided with annular groove, and described annular groove is embedded with O-ring seals.
As preferably, described valve gap is combined in the internal thread of valve body upper end with external thread rotary.
The beneficial effects of the utility model:
When damaging, can in time send on diaphragm warning Xin number;
Even diaphragm damages, medium can not leak yet; Therefore can be used for the occasion that do not allow medium to leak, such as the pipe-line system of transfer oil or near the occasion etc. of electrical equipment is arranged.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present utility model;
Accompanying drawing 2 the utility model are installed in the use phase diagram on the reduction valve.
Description of reference numerals: the bar 1 of posting a letter, reduction valve valve gap 2, sealing gasket 3, valve body 4, O-ring seals 1, upper spring 6, valve gap 7, lower spring 8, relief valve body 9, O-ring seals 2 10, screw plug 11, diaphragm 12, air stream through hole K, aperture one a, aperture two b, aperture three c, aperture four d, aperture five e, aperture six f, gap g, ball G, inlet pressure P1, outlet pressure P2, pressure-relief valve spring chamber H.
Embodiment
Below by embodiment also by reference to the accompanying drawings, the technical solution of the utility model is further described in detail.
Embodiment:
Now illustrate that with Fig. 2 the utility model is installed in the function on the reduction valve, the function of relevant reduction valve is well-known, does not describe in detail here.
Valve diaphragm damage alarming device as shown in Figure 1, by valve body 4, the bar 1 of posting a letter, upper spring 6, lower spring 8, O-ring seals 1, valve gap 7, and the part such as sealing gasket 3 form.Valve body 4 has step-like endoporus, and the cylinder barrel in its stage casing is joined with the piston cunning in bar 1 stage casing of posting a letter, and piston is divided into epicoele and cavity of resorption to the inner chamber of valve body 4, and And is stoped the leakage of medium between two chambeies by O-ring seals 1; Valve gap 7 usefulness external thread rotaries with air stream through hole K are combined in the internal thread of valve body 4 upper ends, and the cylinder barrel cunning of the cylndrical surface of its lower sleeve and valve body 4 is joined, and therefore the axis of its center hole is consistent with the axis of valve body 4 cylinder barrels after the assembling; The long shaft rod of bar 1 of posting a letter slides in the center hole of valve gap 7, therefore, the axis of bar 1 of posting a letter after the installation is consistent with the axis of valve body 4 cylinder barrels, and can in cylinder barrel, freely move up and down, limit the upper lower end surface of valve gap 7 sleeves that is subjected to that the bar 1 of posting a letter moves, the next restriction that is subjected to its stub shaft lower end surface, between the pit bottom surface of valve gap 7 and piston upper-end surface, be provided with upper spring 6, be provided with lower spring 8 between the bottom surface of valve body 4 cylinder barrels and piston lower surface, spring 6, after 8 installations certain pre compressed magnitude is arranged all, therefore the bar 1 of posting a letter is in the equilibrium position under the effect of two springs, when reduction valve worked, its position can be regulated automatically by the variation of air density in the spring chamber H; The lower end of valve body 4, screw near the sloping platform Minus pressure valve valve gap 2 flange edges with outside thread; And prevents that by sealing gasket 3 medium from leaking, aperture one a of its lower end communicates with aperture two b and aperture three c on the sloping platform, in order to the pressure in the spring chamber H is delivered to the lower end surface of bar 1 piston of posting a letter.
Generally, one chamber of diaphragm 12 is hyperbaric chamber, another chamber is low-pressure cavity, with regard to this reduction valve, the diaphragm epicoele is that spring chamber H is low-pressure cavity, cavity of resorption is hyperbaric chamber, hyperbaric chamber is by aperture three c, aperture four d, aperture five e, aperture six f and gap g communicate with outlet, therefore the pressure of cavity of resorption medium is identical with the pressure of outlet medium, in case diaphragm 12 damages, high pressure water will enter spring chamber H, if this moment, spring chamber H had medium to leak, pressure in the spring chamber H will be lower than outlet pressure P2, and this will have a strong impact on the action of the bar 1 of posting a letter, so spring chamber H must seal.For this reason, set up O-ring seals 2 10 at the adjusting screw rod of reduction valve and the cooperation place of corresponding valve cover hole.O-ring seals 2 10, O-ring seals 1, sealing gasket 3 and diaphragm 12 guarantee that spring chamber H is airtight construction.The side of reduction valve valve gap 2 is provided with screw plug 11, regularly opens, to eliminate the gas-tight phenomenon of spring chamber H.Ball G is in order to shutoff aperture three C.
Working principle of the present utility model
In the situation of reduction valve normal operation, diaphragm 12 moves up and down every now and then with the variation of inlet pressure P1 and flow, to change the size of valve port, keeps delivery pressure P2 substantially constant.When diaphragm 12 move up and down or spring chamber H in temperature variation the time, air pressure in the spring chamber H will raise or reduce, the active force that acts on bar 1 piston lower surface of posting a letter also changes thereupon, the promotion bar 1 of posting a letter moves up and down, thereby changed the volume of spring chamber H, eliminated variation and the consequent gas-tight phenomenon of pressure, made the motion of diaphragm 12 unaffected.
After diaphragm 12 breakages, high pressure water enters spring chamber H, and acts on the lower end surface of bar 1 piston of posting a letter, and promotes it and moves upward, and axostylus axostyle all stretches out, and makes electrical switch (not shown in FIG.) action, sends alarm signal.
Because spring chamber H seal, even diaphragm 12 damages, medium can not leak yet, so this reduction valve can be used for the occasion that do not allow medium to leak.
The utility model is applicable to most of valve that adopts diaphragm structure.
Innovative point of the present utility model
1, the bar of posting a letter is floating structure, during the reduction valve normal operation, moves up and down according to the pressure change in the spring chamber, to eliminate the gas-tight phenomenon of spring chamber, guarantees that diaphragm moves up and down reliably.When diaphragm damaged, high pressure water entered the spring chamber bar axostylus axostyle that promotes to post a letter and moves upward, and sends alarm signal.
2, spring chamber is airtight construction, also can not leak even diaphragm damages medium.
Claims (4)
1. valve diaphragm damage alarming device is characterized in that:
The bar of posting a letter (1) that has valve body (4) and join with the valve body cunning;
Described valve body has step-like endoporus, and its stage casing is cylinder barrel, and the external diameter of hypomere hollow shaft is provided with connecting thread, and the upper end is provided with valve gap (7), and described valve gap is provided with center hole and air stream through hole (K);
The described bar of posting a letter (1) comprise the axostylus axostyle of joining with the bonnet central bore cunning and with axostylus axostyle one and the piston of joining with the cylinder barrel cunning;
The upper and lower balance spring that is provided with of described piston.
2. valve diaphragm damage alarming device according to claim 1, it is characterized in that: described balance spring comprises the pit bottom surface of valve gap (7) and the upper spring (6) between the piston upper-end surface and the lower spring (8) between piston lower surface and the cylinder barrel bottom surface.
3. valve diaphragm damage alarming device according to claim 1 and 2, it is characterized in that: described piston external diameter is provided with annular groove, and described annular groove is embedded with O-ring seals two (10).
4. valve diaphragm damage alarming device according to claim 1 and 2 is characterized in that: described valve gap (7) is combined in the internal thread of valve body (4) upper end with external thread rotary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220436644.1U CN202834348U (en) | 2012-08-30 | 2012-08-30 | Valve membrane damage-alarming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220436644.1U CN202834348U (en) | 2012-08-30 | 2012-08-30 | Valve membrane damage-alarming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202834348U true CN202834348U (en) | 2013-03-27 |
Family
ID=47946056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220436644.1U Expired - Lifetime CN202834348U (en) | 2012-08-30 | 2012-08-30 | Valve membrane damage-alarming device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202834348U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542150A (en) * | 2013-10-30 | 2014-01-29 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
-
2012
- 2012-08-30 CN CN201220436644.1U patent/CN202834348U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103542150A (en) * | 2013-10-30 | 2014-01-29 | 杭州春江阀门有限公司 | Pressure reducing valve with valve closing function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |