CN209540058U - A kind of modified Desuperheating water regulating valve - Google Patents

Abstract

The utility model discloses a kind of modified Desuperheating water regulating valves, including valve body, valve deck, valve rod and pressure ring, the body top is fixedly connected by bolt with valve deck, the side of the body top offers the mounting hole of fitted bolt, the valve inner offers valve chamber, top on the inside of the valve chamber, which is bolted, is equipped with pressure ring, the valve body side offers the entrance through valve chamber, the valve body other side is offered through the outlet of valve chamber, it is bolted at center inside the valve chamber and valve seat is installed, valve rod is threaded at the valve deck axle center, the stem bottom is rotatably equipped with main valve plug, this modified Desuperheating water regulating valve is when valve opening, pilot valve core wire moves up, then position of the initial water stream across pilot valve and main valve plug, to weaken impact of the water flow to main valve plug, Reduce probability of the main valve plug by impact failure, improves the service life of valve.

Description

A kind of modified Desuperheating water regulating valve

Technical field

The utility model relates to Desuperheating water regulating valve technical field, specially a kind of modified Desuperheating water regulating valve.

Background technique

Desuperheating water regulating valve is a kind of anti-cavitation multi-level throttle regulating valve, which can be used for large and medium-sized generating set, is controlled The flow of desuperheating water needed for boiler main steam processed and reheat steam temperature, it is one of power plant key regulating valve.

For labyrinth type Desuperheating water regulating valve, the water-in and water-out mode of existing labyrinth type Desuperheating water regulating valve use It is " upper entering and lower leaving " pattern, valve internal has core packet, spool, valve seat, pilot sleeve, pressure ring and sealing element, and valve core inside has two The connection type of a balance hole, valve and pipeline is horizontal connection.

But existing labyrinth type Desuperheating water regulating valve is when in use, has the following deficiencies:

1, in the unit starting stage, when valve carries out small guide vane and adjusts working medium flow, valve line is easy by foreign matter or water Impact and by destroying and then lead to valves leakage.

2, in the flow adjustment process in unit starting stage, balanced seal can be because of multiple unlatching of the spool in core packet And leakage in leading to abrasion and then generating.

Utility model content

The purpose of this utility model is to provide a kind of modified Desuperheating water regulating valves, to solve to mention in above-mentioned background technique Out the problem of.

To achieve the above object, the utility model provides the following technical solutions: a kind of modified Desuperheating water regulating valve, including Valve body, valve deck, valve rod and pressure ring, the body top are fixedly connected by bolt with valve deck, and the side of the body top is opened Mounting hole equipped with fitted bolt, the valve inner offer valve chamber, and the top on the inside of the valve chamber is bolted peace Equipped with pressure ring, the bottom on the inside of the pressure ring, which is bolted, is equipped with orifice union, and the valve body side, which offers, to be run through The entrance of valve chamber, the valve body other side offer solid by bolt at the center inside the outlet of valve chamber, the valve chamber Dingan County is equipped with valve seat, is threaded with valve rod at the valve deck axle center, the stem bottom is rotatably equipped with main valve plug, the valve Bar outer wall is socketed with pilot valve close to the side of main valve plug, and the main valve plug is located at valve seat top, and the pilot valve is located at On the inside of pressure ring.

Preferably, the valve deck bottom is welded with annular fixture block, and the body top offers the ring for cooperating annular fixture block The bottom of shape card slot, the annular slot inner wall is bonded with valve bonnet seal circle.

Preferably, spool balanced seal is bonded on the inside of the valve seat.

Preferably, valve seat gasket is bonded between the seat bottom portion and valve chamber inner wall.

Preferably, the annular slot is located at the top of valve body and pressure ring joint.

Compared with prior art, the utility model has the beneficial effects that

1, spool is arranged to main valve plug and pilot valve by the utility model, and the spool between main valve plug and valve seat is put down Weighing apparatus sealed set is sealed at horizontal plane, and when valve opening, pilot valve core wire is moved up, and then initial water stream passes through pilot valve Position between core and main valve plug reduces probability of the main valve plug by impact failure to weaken impact of the water flow to main valve plug, Improve the service life of valve.

2, the utility model is reduced by the way that the spool balanced seal between main valve plug and valve seat is arranged to horizontal plane sealing Friction between main valve plug and spool balanced seal is damaged after preventing spool balanced seal from repeatedly being rubbed, is avoided Gap is generated between main valve plug and spool balanced seal, prevents valve from interior leakage phenomenon occur.

Detailed description of the invention

Fig. 1 is the utility model main view the schematic diagram of the section structure；

Fig. 2 is the utility model valve body the schematic diagram of the section structure.

In figure: 10- valve body；11- valve chamber；12- entrance；The outlet 13-；14- valve seat；15- spool balanced seal；16- valve seat Gasket；17- annular slot；18- valve bonnet seal circle；19- mounting hole；20- valve deck；21- bolt；30- valve rod；31- main valve plug； 32- pilot valve；40- pressure ring；41- orifice union.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

The utility model provides a kind of technical solution referring to FIG. 1-2: a kind of modified Desuperheating water regulating valve, including valve Body 10, valve deck 20, valve rod 30 and pressure ring 40 are fixedly connected by bolt 21 with valve deck 20 at the top of the valve body 10, the valve body The side at 10 tops offers the mounting hole 19 of fitted bolt 21, offers valve chamber 11, the valve chamber 11 inside the valve body 10 It is bolted at the top of inside and pressure ring 40 is installed, the bottom of 40 inside of pressure ring, which is bolted, is equipped with throttling Component 41,10 side of valve body offer the entrance 12 through valve chamber 11, and 10 other side of valve body is offered through valve chamber 11 outlet 13 is bolted at the center inside the valve chamber 11 and is equipped with valve seat 14, spiral shell at 20 axle center of valve deck Line is connected with valve rod 30, and 30 lower rotation of valve rod is equipped with main valve plug 31, and 30 outer wall of valve rod is close to main valve plug 31 Side is socketed with pilot valve 32, and the main valve plug is located at 14 top of valve seat, and the pilot valve 32 is located at 40 inside of pressure ring.

Wherein, 20 bottom of valve deck is welded with annular fixture block, offers at the top of the valve body 10 and cooperates annular fixture block The bottom of annular slot 17,17 inner wall of annular slot is bonded with valve bonnet seal circle 18, passes through annular fixture block and annular slot 17 cooperations, can be such that valve body 10 accurately fits together with valve deck 20, and by being bonded valve deck inside annular slot 17 Sealing ring 18 improves the leakproofness between valve body 10 and valve deck 20.

Wherein, spool balanced seal 15 is bonded on the inside of the valve seat 14, spool balanced seal 15 uses rubber gasket It is made, spool balanced seal 15 is uniformly covered on 14 upper surface of valve seat and medial surface, when the valve is closed, under main valve plug 31 The spool balanced seal 15 on surface and 14 upper surface of valve seat, such spool balanced seal 15 are rendered as horizontal plane state, pass through by Spool balanced seal 15 between main valve plug 31 and valve seat 14 is arranged to horizontal plane sealing, reduces main valve plug 31 and spool balances Friction between sealing 15 prevents from spool balanced seal more than 15 times damaging after being rubbed.

Wherein, valve seat gasket 16 is bonded between 14 bottom of valve seat and 11 inner wall of valve chamber, the valve seat gasket 16 is adopted It is made of silicagel pad, by increasing valve seat gasket 16 between 11 inside of valve chamber and 14 bottom of valve seat, improves valve seat 14 and valve Leakproofness between 11 inner wall of chamber prevents leakage phenomenon occur between valve seat 14 and valve chamber 11.

Wherein, the annular slot 17 is located at the top of valve body 10 Yu 40 joint of pressure ring, passes through annular slot 17 in this way Internal valve bonnet seal circle 18 can block valve body 10 and the gap of 40 joint of pressure ring, prevent valve body 10 from engaging with pressure ring 40 There is leakage phenomenon in the gap at place, to improve the leakproofness of valve entirety.

Working principle: when in use, when Open valve, drive main valve plug 31 and pilot valve 32 upward by valve rod 30 It is mobile, and initial water flow initially passes through the position between pilot valve 32 and main valve plug 31, to weaken water flow to main valve plug 31 Impact, reduce main valve plug 31 by the probability of impact failure, when closing valve, pass through valve rod 30 and drive main valve plug 31 simultaneously It is moved down with pilot valve 32, then main valve plug 31 is contacted with the spool balanced seal 15 of 14 upper surface horizontality of valve seat, By the way that the spool balanced seal 15 between main valve plug 31 and valve seat 14 is arranged to horizontal plane sealing, master when reducing valve opening Friction between spool 31 and spool balanced seal 15 prevents from spool balanced seal more than 15 times damaging after being rubbed.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.

While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art, It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.

Claims (5)

1. a kind of modified Desuperheating water regulating valve, including valve body (10), valve deck (20), valve rod (30) and pressure ring (40), feature It is: is fixedly connected by bolt (21) with valve deck (20) at the top of the valve body (10), the side at the top of the valve body (10) is opened Mounting hole (19) equipped with fitted bolt (21), the valve body (10) is internal to be offered valve chamber (11), on the inside of the valve chamber (11) Top be bolted and be equipped with pressure ring (40), the bottom on the inside of the pressure ring (40), which is bolted, is equipped with throttling Component (41), valve body (10) side offer the entrance (12) through valve chamber (11), and valve body (10) other side opens up Have to be bolted at the outlet (13) of valve chamber (11), the internal center of the valve chamber (11) and valve seat (14) be installed, It is threaded with valve rod (30) at valve deck (20) axle center, valve rod (30) lower rotation is equipped with main valve plug (31), institute It states valve rod (30) outer wall to be socketed with pilot valve (32) close to the side of main valve plug (31), the main valve plug is located on valve seat (14) Portion, the pilot valve (32) are located on the inside of pressure ring (40).

2. a kind of modified Desuperheating water regulating valve according to claim 1, it is characterised in that: valve deck (20) the bottom weldering It is connected to annular fixture block, the annular slot (17) for cooperating annular fixture block, the annular slot are offered at the top of the valve body (10) (17) bottom of inner wall is bonded with valve bonnet seal circle (18).

3. a kind of modified Desuperheating water regulating valve according to claim 1, it is characterised in that: viscous on the inside of the valve seat (14) It is connected to spool balanced seal (15).

4. a kind of modified Desuperheating water regulating valve according to claim 1, it is characterised in that: valve seat (14) bottom with Valve seat gasket (16) are bonded between valve chamber (11) inner wall.

5. a kind of modified Desuperheating water regulating valve according to claim 2, it is characterised in that: annular slot (17) position In the top of valve body (10) and pressure ring (40) joint.