CN201739525U - Elastic dual-sealing steam pressure-reducing valve - Google Patents

Abstract

The utility model relates to a steam pressure-reducing valve aiming at effectively eliminating the leakage phenomenon of the valve and having the characteristics of good sealing performance, low manufacturing precision requirement and lower manufacturing cost. The technical scheme is as follows: the elastic dual-sealing steam pressure-reducing valve comprises a valve shell, a valve stem, two valve seats and a power mechanism, wherein a partition plate in the valve shell divides a space in the valve shell into a steam feeding chamber and a steam discharging chamber, wherein the steam feeding chamber is communicated with a steam inlet; the steam discharging chamber is communicated with a steam outlet; the valve steam which can move axially are inserted in the steam feeding chamber and the steam discharging chamber in a penetrating manner; the two valve seats are arranged on the partition plate and used for circulating steam; the valve stem is provided with two conical valve flaps which can adapt to the positions of the valve holes; the power mechanism drives the valve stem to move in the axial direction; an expansion joint used for bearing the elastic deformation of the body material is arranged near the parts on the conical valve flaps contacting and inosculating with the valve hole, or/and a back-off joint used for bearing the elastic deformation of the body material is arranged near the parts on the valve seat contacting and inosculating with the conical valve flaps; and the expansion joint and the back-off joint surround with each other to form a ring in the circumferential direction of the valve seat.

Description

Steam elasticity double-sealing reduction valve

Technical field

The utility model relates to a kind of steam reducing valve.

Background technique

Steam reducing valve is the vitals in the steam pipework, is widely used in petrochemical industry, chemical industry, metallurgy, papermaking, sugaring, textile printing and dyeing and other multiple industry.The structure of conventional steam reducing valve is as shown in Figure 1: this valve comprises that one is shaped on the valve casing of steam inlet and steam ouput, in the valve casing one cuts off the admission chamber and the steam output chamber that be communicated with steam ouput of space segmentation in the valve casing for the connection steam inlet, but the valve rod of an axial motion interts at described admission chamber, steam output chamber and cuts off 2 valve seats that are used for the steam circulation, be shaped on 2 taper valves that adapt with described valve opening position on the valve rod, the valve opening on taper valve and the valve seat forms the valve port that opens and closes valve; Drive described valve rod axial motion by a power mechanism of forming by motor, speed reducer in addition, and then realize the opening and closing of reduction valve.This valve is the major valve that bears the mesohigh vapor pressure, and the axial closing pressure that common valve opening bears is between 40-100kg.

The deficiency of above reduction valve is that accuracy of manufacturing is had relatively high expectations; This is because the flap and the valve seat of valve rod is rigid material, adds the existence of machining tolerance, is difficult to accomplish that 2 valve ports just in time close simultaneously; Under the working condition of high pressure, big flow, leak easily, to such an extent as to be difficult to satisfy usage requirement.

The model utility content

The purpose of this utility model is to overcome the deficiency that the above-mentioned background technology exists, and a kind of improvement of steam reducing valve is provided, and this reduction valve should effectively solve the valve leak phenomenon, and has good seal performance, accuracy of manufacturing is less demanding, fabricating cost is lower characteristics.

The technological scheme that the utility model provides is: steam elasticity double-sealing reduction valve, comprise that one is shaped on the valve casing of steam inlet and steam ouput, what be provided with in the valve casing one cuts off separated by spaces in the valve casing is admission chamber that is communicated with steam inlet and the steam output chamber that is communicated with steam ouput, but the valve rod of an axial motion interts at described admission chamber, steam output chamber and cuts off 2 valve seats that are used for the steam circulation; Be shaped on 2 taper valves adapting with described valve opening position on the valve rod and then form the valve port that opens and closes valve with valve opening on the valve seat; Other has a power mechanism to drive described valve rod axial motion, to realize the opening and closing of reduction valve; It is characterized in that on the described taper valve with valve opening contact anastomotic position near be shaped on the expansion joint that is used to bear the bulk material resiliently deformable, this circumferencial direction that is sewn on valve rod is around lopping; Or/and on the valve seat with taper valve contact anastomotic position near be shaped on the yielding seam that is used to bear the bulk material resiliently deformable, this circumferencial direction that is sewn on valve seat is around lopping.

Expansion joint on the described taper valve is positioned at the top that contacts anastomotic position with valve opening, and both are apart from 10-15mm.

Yielding on described valve seat seam be positioned at contact with taper valve anastomotic position above or below, both are apart from 10-15mm.

Described power mechanism is the speed reducer of driven by motor, or Pneumatic actuator.

Working principle of the present utility model is: be shaped on the expansion joint on the described taper valve, perhaps be shaped on the valve seat and make a concession after the seam, make on the taper valve and the anastomotic position that contacts of valve opening that perhaps the valve opening of valve seat has had certain elastic deformation leeway with the anastomotic position that contacts of taper valve; In the moment of valve rod axial motion compressing valve opening, taper valve is or/and distortion takes place to make a concession in the contact anastomotic position of valve opening under the pressure of valve rod, and then realized two valve ports hermetically closing that just in time fits like a glove, having guaranteed under the working condition of high pressure, big flow still can reliable sealing and do not have leakage phenomenon and take place.

The beneficial effects of the utility model are: use the utility model, accomplished fully that two valve ports just in time coincide simultaneously to close, and favorable sealing property, satisfied the user's needs and the market demand conscientiously; Thereby has a wide popularizing prospect.

Description of drawings

Fig. 1 is a main TV structure schematic representation of the present utility model.

Fig. 2 is the A portion structure for amplifying schematic representation among Fig. 1.

Fig. 3 is the structure for amplifying schematic representation of the upper valve base among Fig. 1.

Fig. 4 is the structure for amplifying schematic representation of the lower valve base among Fig. 1.

Embodiment

As shown in the figure, steam elasticity double-sealing reduction valve, comprise that one is shaped on the valve casing 1 of steam inlet 3-1 (the steam input direction as shown by arrow B) and steam ouput 9-1 (the steam outbound course as shown by arrow D), apartition 4 that is provided with in the valve casing is admission chamber that is communicated with steam inlet and the steam output chamber that is communicated with steam ouput with separated by spaces in the valve casing, but thevalve rod 6 of an axial motion interts in described admission chamber 3, steam output chamber 9 and cut off 2 valve openings that are used for the steam circulation (figure shows: be shaped onupper valve base 5 andlower valve base 2 on the partition, be shaped on a valve opening on upper valve base and the lower valve base respectively, two valve openings are coaxial), be shaped on 2 taper valves (promptly going up flap 6-2 and lower Disc 6-1) that adapt with described 2 valve opening positions on the valve rod, each taper valve forms the valve port that opens and closes valve with corresponding valve opening; Other has a power mechanism 8 of being made up of motor, speed reducer (or Pneumatic actuator) to drive described valve rod axial motion by a shaft joint 7, and then realizes the opening and closing of reduction valve.Above structure is identical with existing steam reducing valve structure.

Improvement of the present utility model be on described flap and valve opening contact anastomotic position near be shaped on the expansion joint 6-21 that is used to bear the bulk material resiliently deformable, this circumferencial direction that is sewn on valve rod is around lopping; Or/and on the lower Disc with valve opening contact anastomotic position near be shaped on the expansion joint 6-11 that is used to bear the bulk material resiliently deformable, this seam also at the circumferencial direction of valve rod around lopping; Described expansion joint 6-21 or expansion joint 6-11 all are positioned at the top that contacts anastomotic position with valve opening, and both are apart from 10-15mm.The opening Normal direction at expansion joint can perhaps form certain angle of inclination with valve rod axis up, and concrete angle can be determined on demand;

Or/and on theupper valve base 5 with taper valve contact anastomotic position near be shaped on the yielding seam 5-1 that is used to bear the bulk material resiliently deformable, this circumferencial direction that is sewn on valve seat is around lopping; Or/and contact with taper valve on the valve opening oflower valve base 2 anastomotic position near be shaped on the yielding seam 2-1 that is used to bear the bulk material resiliently deformable, this circumferencial direction that is sewn on valve seat is around lopping.

Described yielding seam 5-1 be positioned at contact with taper valve anastomotic position above or below, both are apart from being recommended as 10-15mm; Described yielding seam 2-1 be positioned at contact with taper valve anastomotic position above or below, both are apart from being recommended as 10-15mm.The opening Normal direction of making a concession seam can be up, and is perhaps downward, perhaps forms certain angle of inclination with valve rod axis, and concrete angle is determined on demand.

In the above structure,upper valve base 5 orlower valve base 2 and taper valve contact the bulk material that anastomotic position directly is a valve seat (recommending to use 12Cr18Ni9).

Further, also can be the contact anastomotic position 5-3 of describedupper valve base 5 build-up wear-resistant material (recommend use D507MO), or/and the contact anastomotic position 2-3 oflower valve base 2 also built-up welding high-abrasive material is arranged; (as shown in the figure).

Claims (4)

1. steam elasticity double-sealing reduction valve, comprise that one is shaped on the valve casing (1) of steam inlet (3-1) and steam ouput (9-1), what be provided with in the valve casing one cuts off (4) separated by spaces in the valve casing is admission chamber (3) that is communicated with steam inlet and the steam output chamber (9) that is communicated with steam ouput, but the valve rod of an axial motion (6) interts at described admission chamber (3), steam output chamber (9) and cuts off and is used for 2 valve seats that steam circulates; Be shaped on 2 taper valves adapting with described valve opening position on the valve rod and then form the valve port that opens and closes valve with valve opening on the valve seat; Other has a power mechanism (8) to drive described valve rod axial motion, to realize the opening and closing of reduction valve; It is characterized in that on the described taper valve with contacting of valve opening be shaped near the anastomotic position expansion joint that is used to bear the bulk material resiliently deformable (6-11,6-21), this circumferencial direction that is sewn on valve rod is around lopping; Or/and on the valve seat with taper valve contact anastomotic position near be shaped on the yielding seam that is used to bear the bulk material resiliently deformable (5-1,2-1), this circumferencial direction that is sewn on valve seat be around lopping.

2. steam elasticity double-sealing reduction valve according to claim 1 is characterized in that (6-11 6-21) is positioned at the top that contacts anastomotic position with valve opening, and both are apart from 10-15mm for expansion joint on the described taper valve.

3. steam elasticity double-sealing reduction valve according to claim 1, it is characterized in that on the described valve seat yielding seam (5-1,2-1) be positioned at contact with taper valve anastomotic position above or below, both are apart from 10-15mm.

4. according to claim 2 or 3 described steam elasticity double-sealing reduction valve, it is characterized in that described power mechanism (8) is the speed reducer of driven by motor, or Pneumatic actuator.

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