CN114922986A - A high temperature and high pressure welded shut-off valve - Google Patents

Abstract

The invention discloses a high-temperature and high-pressure resistant welded stop valve, which comprises a valve seat in the middle, wherein a positioning column sleeve is screwed in a valve hole in the upper end of the valve seat, a valve cover is inserted in the upper end of the positioning column sleeve, a circular sealing cover is formed at the lower end of the valve cover, a flange is formed on the outer wall of the upper end of the valve seat, a plurality of bolts are inserted in the outer ring of the sealing cover, and the bolts are screwed and fixed on the flange; a cylindrical valve rod is inserted in the positioning column sleeve, and the lower end of the valve rod extends out of the positioning column sleeve and is inserted in the valve hole; the inner wall of valve hole is pressed and is pressed there is the case, and the shaping has the double-screw bolt on the up end of case, the double-screw bolt spiro union is on the valve rod, the valve rod on the shaping have the rectangle draw-in groove that runs through terminal surface under the valve rod, the shaping of double-screw bolt upper end has vertical spacing notch, it has spacing card strip to peg graft in the rectangle draw-in groove of valve rod, the spacing notch of establishing the double-screw bolt is inserted to the lower extreme of spacing card strip.

Description

A high temperature and high pressure welded shut-off valve

technical field

The invention relates to the technical field of valves, and more particularly to a high temperature and high pressure resistant welded shut-off valve.

Background technique

Valve is a control component in a fluid conveying system, with functions such as cut-off, regulation, diversion, prevention of backflow, stabilization, diversion or overflow pressure relief. Valves are often used in industrial production processes; for example, on liquid conveying pipelines It is necessary to use a valve. The valve of the existing conveying pipeline is generally driven by a screw to realize the closing of the valve core to realize the pipeline interception, that is, a stop valve. There are many types of stop valves. Among them, the welded stop valve is a common type of stop valve. The road connection adopts a welded structure, and the sealing surface is not easy to wear and scratch, with good sealing performance and long service life.

The existing welded globe valve is often used in high temperature and high pressure environment. When sealing, it mainly uses the rubber seal vulcanized and fixed on the valve core for sealing. However, the high temperature and high pressure environment has a great influence on the rubber seal. They are all high temperature and high pressure resistant materials, but high temperature and high pressure will still accelerate the shortening of the life of the rubber seal. To replace the rubber seal, the valve core needs to be replaced, and the valve core and the valve stem are generally integral structures, so the entire valve core structure must be replaced.

SUMMARY OF THE INVENTION

The purpose of the present invention is to address the deficiencies of the prior art, and to provide a high temperature and high pressure resistant welded shut-off valve. , the valve stem can be reused to improve the utilization of resources.

A high-temperature and high-pressure welded shut-off valve, comprising a valve seat in the middle, a valve hole penetrating the upper end face of the valve seat is formed in the valve seat, and a liquid inlet communicated with the valve hole is welded and fixed on the left outer wall of the lower end of the valve seat The right outer wall of the lower end of the valve seat is welded and fixed with a liquid outlet pipe that communicates with the valve hole; the valve hole at the upper end of the valve seat is screwed with a positioning column sleeve, and the upper end of the positioning column sleeve is inserted with a conical valve cover , the lower end of the valve cover is formed with a circular cover, the outer wall of the upper end of the valve seat is formed with a flange, the outer ring of the cover is inserted with a number of bolts, and the bolts are screwed and fixed on the flange; it is characterized in that: the A cylindrical valve stem is inserted into the positioning column sleeve, and the lower end of the valve stem extends out of the positioning column sleeve and is inserted into the valve hole; the inner wall of the valve hole is pressed against the valve core, and the upper end surface of the valve core is formed with The stud is screwed on the valve stem, the valve stem is formed with a rectangular slot that penetrates the lower end surface of the valve stem, the upper end of the stud is formed with a vertical limit slot, and the rectangular slot of the valve stem is formed The limit clip is inserted, and the lower end of the limit clip is inserted into the limit slot of the stud;

The valve stem on the upper side of the positioning column sleeve is formed with a vertical guide groove which is communicated with the rectangular card groove, a horizontal pin is inserted in the guide groove, and the upper end of the limit clip is fixed on the horizontal pin. The guide grooves protruding from the valve stem at both ends abut against the lower end surface of the screw sleeve, the screw sleeve is screwed on the valve rod, the upper end of the valve rod is formed with a vertical lead screw, and the lead screw is screwed on the connecting seat and extends A handwheel is fixedly connected to the outlet connecting seat, and the connecting seat is formed on the top of the valve cover.

Preferably, a first sealing member and a second sealing member are respectively inserted and fixed on the outer wall of the valve core and the outer wall of the valve stem, and the first sealing member is pressed against the inner wall of the valve hole; the second sealing member is pressed against the inner wall of the valve hole. on the inner wall of the positioning column sleeve.

Preferably, the lower end surface of the valve hole in the valve seat is spherical, and the lower end surface of the valve core is formed with a spherical guide dimple.

Preferably, a ring groove penetrating the upper end face of the valve seat is formed on the inner wall of the upper end of the valve hole in the valve seat, the positioning column sleeve is inserted into the ring groove at the upper end of the valve hole, and the lower end surface of the positioning column sleeve and the lower side of the ring groove are formed. A sealing gasket is sandwiched between the horizontal end faces of the .

Preferably, several fan-shaped weight-reducing grooves are formed on the outer side wall of the valve cover.

Preferably, the upper end of the positioning column sleeve protrudes from the cover of the valve cover and is inserted with a horizontal limit screw, the upper end surface of the cover is formed with an ear seat opposite to the weight reduction groove, and the limit screw is screwed on the ear seat.

Preferably, reinforcing ribs are welded and fixed between the outer wall of the liquid inlet pipe and the outer wall of the left side of the valve seat and between the outer side wall of the liquid outlet pipe and the outer wall of the right side of the valve seat.

The beneficial effect of the present invention is that the valve core and the valve stem are designed as a separate structure, only the valve core needs to be replaced when the rubber seal is aging, the valve stem can be reused, and the utilization rate of resources is improved.

Description of drawings

Fig. 1 is the three-dimensional structural representation of the present invention;

Fig. 2 is the structural representation of the side view of the present invention;

FIG. 3 is a schematic partial cross-sectional view of the present invention in a front view direction.

In the figure: 1, valve seat; 11, valve hole; 12, liquid inlet pipe; 13, liquid outlet pipe; 14, flange; 15, reinforcing rib plate; 2, positioning column sleeve; 3, valve core; 31, screw Column; 32. Limit slot; 33. Diversion pocket; 4. Counterbore; 5. Connecting rod; 4. First seal; 5. Valve stem; 6. Second seal; 7. Valve cover; 71, cover; 72, connection seat; 73, weight reduction groove; 74, ear seat; 8, hand wheel; 9, limit clip; 10, horizontal pin; 20, screw sleeve; 30, bolt; 40, limit bit screw.

Detailed ways

Example: As shown in Figures 1 to 3, a high temperature and high pressure resistant welded globe valve includes a valve seat 1 in the middle, the valve seat 1 is formed with a valve hole 11 penetrating the upper end surface of the valve seat 1, and the lower end of the valve seat 1 is formed. A liquid inlet pipe 12 connected to the valve hole 11 is welded and fixed on the left outer wall of the valve seat 1, and a liquid outlet pipe 13 connected with the valve hole 11 is welded and fixed on the right outer wall of the lower end of the valve seat 1; the valve on the upper end of the valve seat 1 The hole 11 is screwed with the positioning column sleeve 2, the upper end of the positioning column sleeve 2 is inserted with a conical valve cover 7, the lower end of the valve cover 7 is formed with a circular cover 71, and the outer wall of the upper end of the valve seat 1 is formed with a The flange 14 and the outer ring of the cover 71 are inserted with several bolts 30, and the bolts 30 are screwed and fixed on the flange 14; The lower end protrudes from the positioning column sleeve 2 and is inserted into the valve hole 11; the inner wall of the valve hole 11 is pressed against the valve core 3, and the upper end surface of the valve core 3 is formed with a stud 31, and the stud 31 is screwed on the valve stem. 5, the valve stem 5 is formed with a rectangular slot 52 penetrating the lower end surface of the valve stem 5, the upper end of the stud 31 is formed with a vertical limit slot 32, and the rectangular slot 52 of the valve stem 5 is inserted into the The limit clip 9, the lower end of the limit clip 9 is inserted into the limit slot 32 of the stud 31;

The valve stem 5 on the upper side of the positioning column sleeve 2 is formed with a guide groove 53 that is vertical and communicated with the rectangular card groove 52. The guide groove 53 is inserted with a horizontal pin 10, and the upper end of the limit card bar 9 is fixed on. On the horizontal pin 10, both ends of the horizontal pin 10 protrude from the guide groove 53 of the valve rod 5 and abut against the lower end surface of the screw sleeve 20, the screw sleeve 20 is screwed on the valve rod 5, and the upper end of the valve rod 5 is formed with a vertical The straight lead screw 51 is screwed on the connecting seat 72 and extends out of the connecting seat 72 to be fixedly connected with the handwheel 8 , and the connecting seat 72 is formed on the top of the valve cover 7 .

A first sealing member 4 and a second sealing member 6 are respectively inserted and fixed on the outer wall of the valve core 3 and the outer wall of the valve stem 5, and the first sealing member 4 is pressed against the inner wall of the valve hole 11; the second sealing member The piece 6 is pressed against the inner wall of the positioning column sleeve 2 .

The lower end surface of the valve hole 11 in the valve seat 1 is spherical, and the lower end surface of the valve core 3 is formed with a spherical guide dimple 33 .

The inner wall of the upper end of the valve hole 11 in the valve seat 1 is formed with a ring groove running through the upper end surface of the valve seat 1, the positioning column sleeve 2 is inserted in the ring groove at the upper end of the valve hole 11, and the lower end surface of the positioning column sleeve 2 and the ring groove are formed. A sealing washer is sandwiched between the horizontal end faces on the lower side of the groove.

Several fan-shaped weight reduction grooves 73 are formed on the outer side wall of the valve cover 7 .

The upper end of the positioning column sleeve 2 protrudes from the cover 71 of the valve cover 7 and is inserted with a horizontal limit screw 40. The upper end surface of the cover 71 is formed with an ear seat 74 opposite to the weight-reducing groove 73 to limit the position. The bit screw 40 is screwed on the ear seat 74 .

Reinforcing ribs 15 are welded and fixed between the outer wall of the liquid inlet pipe 12 and the outer wall of the left side of the valve seat 1 and between the outer side wall of the liquid outlet pipe 13 and the outer wall of the right side of the valve seat 1 .

Working principle: The present invention is a welded globe valve resistant to high temperature and high pressure. The main features of the welded globe valve used are on the valve core 3 and the valve stem 5. The valve core 3 and the valve core 3 are mainly used when the flow is shut off. The first seal 4 is greatly affected by high temperature and high pressure, which will accelerate the aging. When the first seal 4 is aging and causes leakage, the structure of the valve core 3 is mainly replaced, and the valve core 3 and the valve stem 5 are connected by thread, and the valve core 3 is connected with the valve stem 5. The limit clip 9 is used to realize the radial restraint between the valve core 3 and the valve stem 5 to prevent the valve core 3 from being separated from the valve stem 5 during the rotation of the valve stem 5 .

The examples are used to illustrate the invention, but not to limit the invention. Any person skilled in the art can make modifications to the embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be as listed in the claims of the present invention.

Claims (7)

1. A high-temperature and high-pressure resistant welded stop valve comprises a valve seat (1) in the middle, wherein a valve hole (11) penetrating through the upper end face of the valve seat (1) is formed in the valve seat (1), a liquid inlet pipe (12) communicated with the valve hole (11) is fixedly welded on the outer wall of the left side of the lower end of the valve seat (1), and a liquid outlet pipe (13) communicated with the valve hole (11) is fixedly welded on the outer wall of the right side of the lower end of the valve seat (1); a positioning column sleeve (2) is screwed in a valve hole (11) at the upper end of the valve seat (1), a conical valve cover (7) is inserted at the upper end of the positioning column sleeve (2), a circular sealing cover (71) is formed at the lower end of the valve cover (7), a flange (14) is formed on the outer wall at the upper end of the valve seat (1), a plurality of bolts (30) are inserted in the outer ring of the sealing cover (71), and the bolts (30) are fixed on the flange (14) in a screwed mode; the method is characterized in that: a cylindrical valve rod (5) is inserted in the positioning column sleeve (2), and the lower end of the valve rod (5) extends out of the positioning column sleeve (2) and is inserted in the valve hole (11); the inner wall of the valve hole (11) is pressed against the valve core (3), a stud (31) is formed on the upper end face of the valve core (3), the stud (31) is in threaded connection with the valve rod (5), a rectangular clamping groove (52) penetrating through the lower end face of the valve rod (5) is formed on the valve rod (5), a vertical limiting notch (32) is formed in the upper end of the stud (31), a limiting clamping strip (9) is inserted into the rectangular clamping groove (52) of the valve rod (5), and the lower end of the limiting clamping strip (9) is inserted into the limiting notch (32) of the stud (31);

the valve rod (5) of locating column cover (2) upside goes up the shaping and has vertical guide way (53) that are linked together with rectangle draw-in groove (52), it has horizontal round pin (10) to peg graft in guide way (53), the upper end of spacing calorie of strip (9) is fixed on horizontal round pin (10), guide way (53) that the both ends of horizontal round pin (10) stretched out valve rod (5) support and lean on the lower terminal surface of swivel nut (20), swivel nut (20) spiro union is on valve rod (5), the upper end shaping of valve rod (5) has vertical lead screw (51), lead screw (51) spiro union is on connecting seat (72) and stretch out connecting seat (72) fixedly connected with hand wheel (8), connecting seat (72) shaping is at the top of valve gap (7).

2. The high-temperature and high-pressure resistant welded stop valve according to claim 1, characterized in that: a first sealing element (4) and a second sealing element (6) are respectively inserted and fixed on the outer wall of the valve core (3) and the outer wall of the valve rod (5), and the first sealing element (4) is pressed against the inner wall of the valve hole (11); the second sealing element (6) is pressed against the inner wall of the positioning column sleeve (2).

3. The welded stop valve resistant to high temperature and high pressure according to claim 1, wherein: the lower end surface of the valve hole (11) in the valve seat (1) is spherical, and a spherical flow guide pit (33) is formed on the lower end surface of the valve core (3).

4. The high-temperature and high-pressure resistant welded stop valve according to claim 1, characterized in that: the inner wall of valve hole (11) upper end in disk seat (1) goes up the shaping and has the annular that runs through disk seat (1) up end, and in locating column cover (2) were inserted and are established the annular of valve hole (11) upper end, the centre gripping has seal ring between the horizontal terminal surface of the lower terminal surface of locating column cover (2) and annular downside.

5. The high-temperature and high-pressure resistant welded stop valve according to claim 1, characterized in that: a plurality of fan-shaped lightening grooves (73) are formed in the outer side wall of the valve cover (7).

6. The high-temperature and high-pressure resistant welded stop valve according to claim 5, characterized in that: the upper end of the positioning column sleeve (2) extends out of a sealing cover (71) of the valve cover (7) and is inserted with a horizontal limiting screw (40), an ear seat (74) opposite to the weight reduction groove (73) is formed on the upper end face of the sealing cover (71), and the limiting screw (40) is screwed on the ear seat (74).

7. The welded stop valve resistant to high temperature and high pressure according to claim 1, wherein: reinforcing rib plates (15) are welded and fixed between the outer side wall of the liquid inlet pipe (12) and the outer wall of the left side of the valve seat (1) and between the outer side wall of the liquid outlet pipe (13) and the outer wall of the right side of the valve seat (1).

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