CN201103695Y

CN201103695Y - Filter screen type non-washing break valve

Info

Publication number: CN201103695Y
Application number: CNU2007200276341U
Authority: CN
Inventors: 孙斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-16
Filing date: 2007-09-16
Publication date: 2008-08-20
Anticipated expiration: 2017-09-16

Abstract

The product relates to a filter screen type non-scouring stop valve, which is applicable to an industrial thermal system and capable of controlling flow rate, and has the function of a switch. The stop valve comprises a valve body, a valve cover, a valve core and valve rod component, a valve base, a filter screen type throttle sleeve, a hand wheel and a sealing device, and is characterized in that a manner of high entering and low exiting is adopted for the flow of media; angles accordant with an angle of an inclined plane of the valve core is arranged at small holes at the lower part of the filter screen type throttle sleeve, thus filtering impurities in the medium on one hand, on the other hand, washing away small impurities which are not filtered in the medium during operation along the angles, so as to prevent the small impurities from being blocked on a junction surface and not affect the sealing performance. The valve can automatically clean the resorted objects outside a sealing surface when closed; the middle part of the filter screen type throttle sleeve is provided with orifices; fluids entering the valve impact mutually to remove energy automatically, thus leading to no impurity scouring on the junction surface of the valve. Therefore, the filter screen type non-scouring stop valve has the advantages of good sealing performance, strong function of flow regulation, no damages on the junction surface, no leakage, and long service life, etc.

Description

Filter net type does not have the stop valve of washing away

Technical field

The utility model relates to a kind of stop valve, a kind of specifically be applied to industrial thermodynamic system, the protection junction plane stop valve avoiding damaging.

Technical background

At present, we know that the stop valve main member of widespread usage is the assembly of valve body and spool valve rod in the thermodynamic systems such as thermal power generation, petrochemical industry.In running, valves leakage often occurs, leak outside, problem, especially valves leakage such as jam caused not only for daily production and seriously influence; And causing a large amount of media losing in vain, the cost that this has increased equipment operation has undoubtedly reduced efficiency.And the main cause of valves leakage to be exactly the junction plane of spool, valve seat be subjected to damage, cause medium to run off.The damage of junction plane mainly contains two aspects and causes, be when valve opening on the one hand or when closing, and sealing surface has almost been concentrated pressure reduction all on the valve.Thereby, junction plane there is the possibility of greatly washing away, cause junction plane to damage; On the other hand, be to close in the closed procedure when valve, the impurity in the medium can be stuck between the junction plane of spool, valve seat.After the valve brute force was closed, hard impurity will cause damage to junction plane, causes valves leakage, and perhaps, hard impurity is stuck on the junction plane, made valve closing not tight, caused valves leakage, and this also is the main cause that influences valves leakage.Like this, not only influenced the safe operation of manufacturing mechanism, and work has brought great inconvenience to repair and maintenance.

Summary of the invention

The purpose of this utility model is to provide a kind of filter net type not have the stop valve of washing away at the deficiencies in the prior art.It is characterized in that: filter net type does not have the stop valve of washing away and is made up of valve body (1), valve gap (2), spool valve rod assembly (3), valve seat (4), filter net type throttle sleeve (5), filler (6), Gland (7), filler wedge (8), handwheel (9) and other seal arrangement etc.The mode of the mobile employing " high in and low out " of medium.Its technological scheme is that filter net type throttle sleeve three parts are formed, and the cylindrical shell of bottom is less filter net type throttling pore, and inclination angle and spool valve seat junction plane angle are consistent; The cylindrical shell at middle part is that four macropores being symmetrically distributed are as through-flow window; Top is cylindrical shell.Valve is when operation, and the filter net type throttle sleeve has been born partial pressure, has reduced washing away of sealing surface of seat, also can convection current measure regulating action.When valve closing, along with moving down of spool, the middle part liquidates the through-flow window of energy dissipating also diminishing progressively, has effectively alleviated the degradation degree of spool valve seat, has also played the effect of regulating flow simultaneously; Valve continues to close, and the main flow of the valve fluid of flowing through changes less filter net type throttling pore into from the through-flow window of four macropores.Because the aperture of aperture is less, can filter the impurity in the fluid, has exempted the damage that junction plane brings thus.And the angle of inclination of aperture is identical with the inclination angle of junction plane, cleaning junction plane that like this can be stronger, and flow is also reducing the more effective junction plane of having protected simultaneously.Tight until valve closing at last.Otherwise during valve opening, to macropore, flow also can progressively become big by little to medium by aperture, and temperature also will progressively raise, and does not cause junction plane to split suddenly because of difference variation is excessive.Thereby reach the effect of protection valve and annex thereof.Many advantages such as it is compared with current techniques, has favorable sealing property, does not have to leak, and maintenance workload reduces significantly, and physical life is long.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Embodiment

The utility model is that a kind of filter net type does not have the stop valve of washing away, and it is made up of valve body (1), valve gap (2), spool valve rod assembly (3), valve seat (4), filter net type throttle sleeve (5), filler (6), Gland (7), filler wedge (8), handwheel (9) and other seal arrangement etc.Show that as Fig. 1 interface and the adapter with pipeline welding left in the valve body both sides, valve body is that bolt is connected with valve gap, and there is the graphite grazing pad centre.

Described filter net type throttle sleeve is made up of bottom aperture, middle part macropore, top cylindrical shell three parts, has played the effect of filtration, throttling, support respectively, is the indispensable vitals of the utility model.After spool was opened, flow reached maximum, and the mixing turbulent flow of macropore and aperture has protected junction plane not washed away, and more can not blocked by impurity.When spool was closed, flow reduced gradually, last single when aperture, and aperture has played the effect of filtration, flushing, and more effective the functional of junction plane of having protected not only reduced the labor intensity of service work and the valve working life that prolongs greatly.

Claims

1. a filter net type does not have the stop valve of washing away, it comprises valve body (1), valve gap (2), valve rod and mangetic core assembly (3), valve seat (4), filter net type throttle sleeve (5), filler (6), Gland (7), filler wedge (8), handwheel (9) composition, it is characterized in that the valve body both sides leave interface or the adapter with pipeline welding, be provided with filter net type throttle sleeve (5) in the valve body, valve seat (4) dependence filter net type throttle sleeve, graphite pads, valve gap are pressed on the valve body, and detachable, form by the aperture that tilts and macropore two-part of level on the filter net type throttle sleeve.

2. do not have the stop valve of washing away according to the described filter net type of claim 1, it is characterized in that the uniform filter net type throttling pore in described filter net type throttle sleeve barrel bottom is consistent with the sealing surface inclination angle.

3. do not have the stop valve of washing away according to the described filter net type of claim 1, it is characterized in that described filter net type throttle sleeve barrel middle part has four macropores of symmetrical distribution as through-flow window.

4. do not have the stop valve of washing away according to the described filter net type of claim 1, it is characterized in that the tight power of filter net type throttle sleeve dependence upper-lower seal pad and valve body, valve cover chamber fixes sealing, and detachable the cleaning.