CN210600249U - Adjustable specific pressure ball valve opening and closing piece - Google Patents

Abstract

A ball valve opening and closing member with adjustable specific pressure mainly comprises a trapezoidal through hole block, two spherical sealing plates, a valve rod, a spring and a tray, is applied to industrial ball valves in the prior art, can be used as a maintenance replacement part for fixing the ball valve opening and closing member, and can also be made into a new ball valve, and the new ball valve has soft and hard double seals of the valve rod, and does not relatively need to stop production to overhaul the valve rod seal; the ball valve also has the function of compensating larger ball abrasion loss, and the specific pressure of the opening and closing piece and the valve seat can be adjusted outside the valve shell in the use and operation of the ball valve.

Description

Adjustable specific pressure ball valve opening and closing piece

Technical Field

The utility model relates to a ball valve opening and closing piece with adjustable specific pressure, which mainly comprises a trapezoidal through hole block, two spherical sealing plates, a valve rod, a spring and a tray, is applied to the industrial ball valve in the prior art, can be used as a maintenance replacement accessory of a fixed ball valve opening and closing piece, and can also be made into a new ball valve, and the novel ball valve has soft and hard double seals of the valve rod, and does not relatively need to stop production to maintain the valve rod seal; still have the compensation function of great spheroid wearing and tearing volume to can use the operation at the ball valve, the specific pressure size of regulating closure and disk seat outside the valve casing, belong to the design and the manufacturing technical field of industry valve.

Background

The most used ball valve in the industrial valve in the prior art accounts for 15.5 percent, wherein the opening and closing piece is the problem that a floating ball body is easy to displace; the opening and closing piece is a double-sleeve sliding structure with a floating valve seat and a fixed ball body, the manufacturing requirement is high, the cost is high, the gap between the double sleeves is easily blocked by impurities in a medium, the two ball valves have the problem that the maintenance and the replacement of aged valve rod soft packing need to stop production, the problems that the specific pressure cannot be adjusted between the opening and closing piece and the valve seat, the abrasion loss compensation function is not available, the service cycle is short, and the ball body and the valve seat need to be replaced together, so the prior art needs to be improved.

Disclosure of Invention

The utility model discloses lie in overcoming the problem that current industry ball valve exists in the background art, the utility model provides an adjustable specific pressure's ball valve opening and closing piece, soft and the stereoplasm double containment structure that has the valve rod, can adjust the specific pressure size of opening and closing piece and disk seat outside the valve casing, and have the compensation function of great opening and closing piece spheroid wearing and tearing volume, reach the valve rod wadding that the ball valve that floats and fixed ball valve exist among the solution prior art, use ageing maintenance to halt, and the compensation function that does not have opening and closing piece wearing and tearing volume, the life cycle is shorter, need to change the purpose of spheroid and disk seat problem together. The utility model discloses a following technical scheme accomplishes: a ball valve opening and closing piece with adjustable specific pressure mainly comprises a trapezoidal through hole block, two spherical sealing plates, a valve rod, a spring and a tray, and is characterized in that a pair of hard sealing pairs are arranged at the lower section of the valve rod and penetrate through the spring, and the spring positioned below the hard sealing pairs is tightly pressed above the trapezoidal through hole block; the square head of the lower end of the valve rod is inserted into the square hole above the trapezoidal through hole block, the rectangular pins are respectively arranged in the middle of the left side and the right side of the trapezoidal through hole block and are arranged in the rectangular grooves close to the back surfaces of the two spherical sealing plates on the inclined sides of the two sides, vacant positions are reserved above and below the grooves, the trapezoidal through hole block can slide up and down, the lower sides of the two spherical sealing plates are located on the tray, and the middle shaft of the tray is located in the round hole at the bottom of the valve casing.

The novel use and working principle are the same as that of the prior art, the square heads of the upper end and the lower end of the valve rod are respectively connected with the square hole of the handle and the square hole above the trapezoidal through hole block, the lower section of the valve rod is provided with a pair of hard sealing pairs and penetrates through the spring, and the spring is tightly pressed above the trapezoidal through hole block; the rectangular round pin strip of trapezoidal through-hole piece both sides and the rectangular groove connection at the spherical sealing plate back have circular through-hole in the middle of the trapezoidal through-hole piece for through the medium, with the handle just or the anti-rotation 90 degrees, accomplish novel opening and close in the ball valve.

Novel operating principle that the valve rod is sealed without shutdown maintenance: the lower section of the novel valve rod is fixed with a pair of metal hard sealing pairs, the non-rotating upper piece of the novel valve rod is compressed and sealed by the existing soft packing, and the rotating lower piece is compressed on the lower plane of the upper piece by a spring; the hard metal sealing pair which mainly plays a role in sealing can resist abrasion for tens of thousands of times, so that the sealing of the valve rod is relatively not required to be overhauled in a production stop.

Novel principle of adjusting the ball and the valve seat specific pressure size outside the valve shell: when the adjusting gland outside the valve shell pushes the existing soft packing and the hard sealing pair fixed on the valve rod downwards, the spring below the adjusting gland is compressed, the trapezoid through hole block with the large upper part and the small lower part is pushed to slide downwards, the two spherical sealing plates on the two sides are extruded to horizontally move towards the left side and the right side and are pressed on the existing valve seat, and the size of the compression spring determines the specific pressure of the ball body and the valve seat. The principle of the novel opening and closing piece ball and valve seat abrasion loss compensation function is as follows: when the spring pushes the trapezoid through hole block with a large upper part and a small lower part to slide downwards, the rectangular pin strips arranged at two sides of the trapezoid through hole block are arranged in the rectangular grooves at the back sides of the two spherical sealing plates, the spherical sealing plates are driven to rotate together, vacant positions are reserved above and below the grooves, the function of extruding downwards to the left and right is to increase the size of the spherical sealing plates in the horizontal direction, the spherical sealing plates are driven to be always kept to rotate in situ to be attached to the valve seats, the lower sides of the two spherical sealing plates are located on the tray, the central shaft of the tray is located in the circular hole at the bottom of the valve shell, the spherical sealing plates cannot be displaced downwards, the sphere and the valve seats are always kept in an attached and grinding state in the rotary abrasion process, and due to the action of the spring, one trapezoid through hole block which.

Compared with the prior art, the utility model have following advantage and effect: adopt above-mentioned scheme, the utility model discloses have the soft or hard double containment of valve rod, do not need the shut down production relatively and overhaul the valve rod seal, increase the production benefit, still have the compensation function of great spheroid and disk seat wearing and tearing volume to can use the operation at the ball valve, adjust the specific pressure size of closure and disk seat outside the valve casing, prolong the use and the maintenance cycle of spheroid and disk seat.

Drawings

FIG. 1 is a schematic axial sectional view of a ball valve with a closure member in a closed state according to the present invention

Detailed Description

It is right to combine below the figure 1 to describe the utility model further, neotype use and theory of operation are the same with prior art, the square head of lower extreme on the valve rod 3 respectively with the square hole of handle 1 and the square hole connection of trapezoidal through-hole piece 10 top, 3 hypomere settings of valve rod are vice 5 and pass spring 13 to the stereoplasm, spring 13 that is located the sealed pair 5 below of stereoplasm compresses tightly in the top of trapezoidal through-hole piece 10, the rectangular round pin strip 11 of trapezoidal through-hole piece 10 both sides is connected with the rectangular recess 9 at the 8 backs of spherical sealing plate, there is circular through-hole in the centre of trapezoidal through-hole piece 10, be used for through the medium, with handle 1 just or the counter-rotation 90 degrees, accomplish neotype opening and close in the ball valve. Novel operating principle that the valve rod is sealed without shutdown maintenance: a pair of metal hard sealing pairs 5 is fixed at the lower section of the novel valve rod 3, the non-rotating upper piece of the novel valve rod is pressed and sealed by the existing soft packing 4, and the rotating lower piece is pressed on the lower plane of the upper piece by a spring 13; the hard metal sealing pair 5 mainly playing a sealing role can resist abrasion for tens of thousands of times, so that the sealing of the valve rod 3 does not need to be stopped and overhauled relatively.

Novel principle of adjusting the specific pressure size of spheroid and disk seat outside the valve casing: when the existing soft packing 4 and the hard sealing pair 5 fixed on the valve rod 3 are pushed downwards by the adjusting gland 2 outside the valve shell, the spring 13 below the existing soft packing is compressed, the trapezoid through hole block 10 with the large upper part and the small lower part is pushed to slide downwards, the two spherical sealing plates 8 extruding two sides horizontally move towards the left side and the right side and are tightly pressed on the existing valve seat 7, and the size of the compression spring 13 determines the specific pressure of a ball body and the valve seat 7.

The principle of the novel opening and closing piece ball and valve seat abrasion loss compensation function is as follows: when the spring 13 pushes the trapezoid through-hole block 10 with big top and small bottom to slide downwards, the rectangular pins 11 arranged on both sides are put into the rectangular grooves 9 on the back of the two spherical sealing plates 8, the spherical sealing plates 8 are driven to rotate together, the upper part and the lower part of the groove 9 are provided with vacant positions which are used for extruding downwards to the left and the right to increase the size of the spherical sealing plates 8 in the horizontal direction and driving the spherical sealing plates 8 to be always kept to be tightly attached to the valve seat 7 for in-situ rotation, the lower parts of the two spherical sealing plates 8 are positioned on the tray 12, the middle shaft of the tray 12 is positioned in a circular hole at the bottom of the valve shell 6, the spherical sealing plate 8 can not be displaced downwards, the ball body and the valve seat 7 are always kept in a close and grinding state in the process of using, rotating and wearing, due to the action of the spring 13, the worn trapezoidal through hole block 10 automatically extrudes a bit downwards, and the function of compensating the abrasion loss of the ball and the valve seat 7 is completed.

Claims (1)

1. A ball valve opening and closing piece with adjustable specific pressure mainly comprises a trapezoidal through hole block (10), two spherical sealing plates (8), a valve rod (3), a spring (13) and a tray (12), and is characterized in that a pair of hard sealing pairs (5) are arranged at the lower section of the valve rod (3) and penetrate through the spring (13), and the spring (13) positioned below the hard sealing pairs (5) is tightly pressed above the trapezoidal through hole block (10); the square head of valve rod (3) lower extreme inserts in the square hole of trapezoidal through-hole piece (10) top, respectively set up a rectangular dowel bar (11) in the middle of the left and right sides of trapezoidal through-hole piece (10), pack into in rectangular recess (9) at two spherical sealing plate (8) backs that are close to on both sides hypotenuse, the vacancy is left from top to bottom of recess (9), trapezoidal through-hole piece (10) can slide from top to bottom, the lower level of two spherical sealing plate (8) is located on tray (12), the axis of tray (12) is located in the round hole of valve casing (6) bottom.

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