CN110285230A - A kind of high safety die forging ball valve - Google Patents

Abstract

The invention discloses a high-safety die-forged ball valve, which comprises a valve body, a valve ball loading port is arranged at the upper end of the valve cavity of the valve body, a valve ball is arranged in the valve cavity, and a first inclined-plane combined valve seat is arranged at the left end of the valve ball. The right end of the ball is provided with a second inclined-plane combined valve seat, the upper end of the valve ball is provided with a positioning boss, the middle of the positioning boss is vertically provided with a positioning groove, and a slider is arranged on the positioning boss, and the lower end surface of the slider A positioning protrusion is integrally arranged, and the positioning protrusion is inserted into the positioning groove. A spring groove is vertically arranged in the middle of the upper end surface of the slider. A spring assembly is embedded in the spring groove, and a valve is arranged directly above the spring assembly. The stem is covered with a valve cover. The above-mentioned technical solution has reasonable structural design, simple structure, no leakage, good sealing performance, no bending or deformation of the valve stem, small opening and closing torque of the valve, convenient maintenance, long service life, stable operation and good practicability.

Description

A high safety die forging ball valve

technical field

The invention relates to the technical field of valves, in particular to a high-safety forging ball valve.

Background technique

Floating ball valve is a fluid control product with a large quantity and a wide range, which is widely used in various pipeline systems. However, most of the existing ball valves are made of two-piece castings or forgings, and there are many leakage points, many casting defects, pores or trachoma, and the preload pressure of the valve seat is not easy to control; and the ball of the existing ball valve is under the action of the fluid medium. It will be pushed to the outlet side, which will generate a driving force on the bottom of the valve stem, which will easily cause the valve stem to bend and deform. The service life is short and frequent maintenance is required, but the maintenance operation is difficult, inconvenient to use, and poor in practicability.

Contents of the invention

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a valve with reasonable structure design, simple structure, not easy to leak, good sealing performance, not easy to bend or deform the valve stem, small valve opening and closing torque, convenient maintenance, long service life, High safety die forging ball valve with stable operation and good practicability.

In order to achieve the above object, the present invention provides the following technical solutions: a high-safety forged ball valve, including a valve body, a valve chamber is arranged in the valve body, a valve ball inlet is arranged at the upper end of the valve chamber, and the valve chamber A valve ball is arranged inside, the left end of the valve ball is provided with a first inclined-plane combined valve seat, the right end of the valve ball is provided with a second inclined-plane combined valve seat, the upper end of the valve ball is provided with a positioning boss, and the positioning boss A positioning groove is vertically arranged on the upper part, a slider is arranged on the positioning boss, and a positioning bump is integrally arranged on the lower end surface of the slider, and the positioning bump is inserted into the positioning groove. A spring groove is vertically arranged in the middle of the upper end surface of the slider, and a spring assembly is embedded in the spring groove. A valve stem is arranged directly above the spring assembly, and the lower end of the valve stem is pressed against the upper end of the spring assembly. The valve stem is covered with a valve cover, and the valve cover is detachably connected with the valve body; the lower end of the valve stem is provided with a valve stem external thread, and the middle part of the valve cover is provided with a valve stem hole, and the valve stem hole The lower end is provided with an internal threaded portion of a bonnet matching the external threaded portion of the valve stem, and the bonnet is threadedly connected to the external threaded portion of the valve stem through the internal threaded portion of the bonnet.

The present invention is further configured as follows: the valve body is integrally formed, and the inner wall surface of the valve cavity is an inclined surface, and the size of the valve cavity gradually decreases from top to bottom.

The present invention is further set up as follows: the first inclined plane combined valve seat includes a first metal support ring, a first valve seat seal ring and a first valve ball seal ring, the first metal support ring, the first valve seat seal ring It is connected with the first valve ball sealing ring to form an integrated structure. The first metal support ring forms a seal between the first valve seat sealing ring and the inner wall of the valve cavity. A seal is formed between the surfaces.

The present invention is further set up as follows: the second inclined plane combined valve seat includes a second metal support ring, a second valve seat seal ring and a second valve ball seal ring, the second metal support ring, the second valve seat seal ring It is connected with the second valve ball sealing ring to form an integrated structure. The second metal supporting ring forms a seal between the second valve seat sealing ring and the inner wall of the valve cavity. The second metal supporting ring is connected to the outer surface of the valve ball through the second valve ball sealing ring. A seal is formed between the surfaces.

The present invention is further set as follows: an O-shaped sealing ring, a sealing packing and a packing gland are sequentially arranged in the valve stem hole from bottom to top, a disc spring assembly is arranged at the upper end of the packing gland, and a disc spring assembly is arranged at the upper end of the disc spring assembly. There is a positioning pressing plate, and the positioning pressing plate and the valve cover are fixed through bolt connection.

The present invention is further configured as: a sealing gasket is arranged between the valve cover and the valve body, the valve cover and the valve body form a seal through the sealing gasket, and the valve cover and the valve body are fixed by bolts.

The present invention is further set as follows: the middle part of the valve ball is provided with a medium through hole; The right inclined surface of the valve ball, the right inclined surface of the valve ball is inclined to the left from top to bottom.

The present invention is further provided that: the right end surface of the first metal support ring and the left end surface of the second metal support ring are welded with a hard alloy sealing layer.

The advantages of the present invention are: compared with the prior art, the structural setting of the present invention is more reasonable, the internal parts of the valve are loaded from the top of the valve body, and can be maintained online, and the valve body is made integrally to reduce leakage points; The combined valve seat has a simple structure and reliable operation. Under the action of the elastic force of the spring assembly, the elastic force acts on the slider, and then transmits the force to the valve ball, and the valve ball then transmits the force to the inclined-plane combined valve seat. Simultaneously generate sealing pretightening force on the sealing ring of the valve seat; a threaded structure is set between the valve stem and the valve cover, and the axial adjustment displacement is generated when the valve stem rotates in a circle, and the effect is: the spring deformation of the spring assembly is increased when the valve is closed Increase the sealing force of the valve ball and the combined valve seat of each inclined surface, improve the sealing effect, reduce the spring load when the valve is opened, and reduce the valve opening torque; set the slider, and when the valve is closed, the ball is ingeniously eliminated. The bending effect of the valve stem makes the valve stem not easy to bend; the O-ring, disc spring assembly and sealing packing are set reasonably. When the pressure and temperature fluctuate, the sealing packing can be automatically adjusted to ensure high safety when the valve stem is working. In line with the requirements of environmental protection development; the entire high-safety die forging ball valve has a reasonable structural design, simple structure, no leakage, good sealing performance, the valve stem is not easy to bend or deform, the valve opening and closing torque is small, easy maintenance, long service life, stable operation and practicality it is good.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

FIG. 1 is a schematic structural view of Embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of a slider according to an embodiment of the present invention;

Fig. 3 is a schematic structural view of the valve seat in Embodiment 2 of the present invention.

Detailed ways

In the description of this embodiment, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", " Outside", "front", "rear", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying Any device or element must have a specific orientation, be constructed and operate in a specific orientation and, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

Embodiment one

Referring to Fig. 1 and Fig. 2, a high-safety forged ball valve disclosed by the present invention includes a valve body 1, a valve chamber 11 is arranged inside the valve body 1, and a valve ball loading port 12 is arranged at the upper end of the valve chamber 11, The valve chamber 11 is provided with a valve ball 2, the left end of the valve ball 2 is provided with a first inclined-plane combined valve seat 3, the right end of the valve ball 2 is provided with a second inclined-plane combined valve seat 4, and the upper end of the valve ball 2 is A positioning boss 21 is provided, a positioning groove 211 is vertically arranged in the middle of the positioning boss 21, a slide block 5 is arranged on the positioning boss 21, and the lower end surface of the slide block 5 is integrally provided with A positioning protrusion 51, the positioning protrusion 51 is inserted into the positioning groove 211, a spring groove 52 is vertically arranged in the middle of the upper end surface of the slider 5, and a spring is embedded in the spring groove 52 Assembly 6, a valve stem 7 is arranged directly above the spring assembly 6, and the lower end of the valve stem 7 is pressed against the upper end of the spring assembly 6; 1 detachable connection; the lower end of the valve stem 7 is provided with a valve stem external thread, the middle of the valve cover 8 is provided with a valve stem hole 81, and the lower end of the valve stem hole 81 is provided with a valve that matches the valve stem external thread. The inner threaded part of the cover, the valve cover 8 is threadedly connected with the outer threaded part of the valve stem through the inner threaded part of the valve cover.

Preferably, the slider 5 is a cross slider, the upper end of the slider 5 is provided with a valve stem limit card slot 53, and the lower end of the valve stem 7 is integrally provided with a limit valve that matches the valve stem limit card groove 53. Position bump, and the limit bump is inserted into the valve stem limit card slot 53.

In order to make the structure of the present invention more reasonable, preferably, the valve body 1 described in this embodiment is integrally formed, and the inner wall surface of the valve cavity 11 is an inclined surface, and the size of the valve cavity 11 is from top to bottom Gradually shrinking, the valve cavity 11 has a rounded table-shaped structure, which is convenient for assembly of valve balls, first inclined-plane combined valve seat 3, second inclined-plane combined valve seat 4, etc., and easy on-line maintenance; the valve body 1 is formed by integral modular forging to make.

Preferably, the valve body 1 is formed by integral modular forging.

The first inclined plane combined valve seat 3 includes a first metal support ring 31, a first valve seat sealing ring 32 and a first valve ball sealing ring 33, and the first metal support ring 31, the first valve seat sealing ring 32 and The first valve ball seal ring 33 is connected to form an integrated structure. The first metal support ring 31 forms a seal between the first valve seat seal ring 32 and the inner wall of the valve cavity 11. The first metal support ring 31 passes through the first valve ball seal ring. 33 forms a seal with the outer surface of the valve ball 2 .

The second inclined plane combined valve seat 4 includes a second metal support ring 41, a second valve seat sealing ring 42 and a second valve ball sealing ring 43, and the second metal support ring 41, the second valve seat sealing ring 42 and The second valve ball sealing ring 43 is connected to form an integrated structure. The second metal support ring 41 forms a seal between the second valve seat sealing ring 42 and the inner wall of the valve cavity 11. The second metal support ring 41 passes through the second valve ball sealing ring. 43 forms a seal with the outer surface of the valve ball 2 .

The valve stem hole 81 is provided with an O-ring 9, a sealing packing 10 and a packing gland 13 sequentially from bottom to top. The upper end of the packing gland 13 is provided with a disc spring assembly 14. The upper end of the disc spring assembly 14 is arranged There is a positioning pressing plate 15, and the positioning pressing plate 15 and the valve cover 8 are fixed by bolting. The valve stem 7 forms a seal between the O-ring 9 and the sealing packing 10 and the inner wall of the valve stem hole 81; when the positioning pressure plate 15 is locked, it compresses the disc spring assembly 14, and the disc spring assembly 14 compresses the packing Gland 13, packing gland 13 compresses sealing packing 10.

A sealing gasket 16 is arranged between the valve cover 8 and the valve body 1 , the valve cover 8 and the valve body 1 form a seal through the sealing gasket 16 , and the valve cover 8 and the valve body 1 are fixed by bolts.

The middle part of the valve ball 2 is provided with a medium through hole 22, the left end of the valve ball 2 is provided with a valve ball left slope 23, and the valve ball left slope 23 is inclined from top to bottom to the right; the right end of the valve ball 2 is provided with a valve The right inclined surface 24 of the ball, the right inclined surface 24 of the valve ball is inclined to the left from top to bottom.

In actual application, the internal parts of the valve are loaded from the top of the valve body, which can be maintained online. The valve body is made in one piece to reduce leakage points; Next, the elastic force acts on the slider, and then transmits to the valve ball, and the valve ball then transmits the force to the inclined-plane combined valve seat, and simultaneously generates a sealing pretightening force on the valve ball sealing ring and the valve seat sealing ring; the valve stem and the valve seat A threaded structure is set between the bonnets, and the axial adjustment displacement occurs when the valve stem rotates in a circle. The effect is: when the valve is closed, the spring deformation of the spring assembly is increased, and the sealing force of the valve ball and the combined seat of each inclined plane is increased. , improve the sealing effect, reduce the spring load when the valve is opened, and reduce the valve opening torque; set the slider, and when the valve is closed, the bending effect of the valve ball on the valve stem is cleverly eliminated, so that the valve stem is not easy to bend; O-shaped sealing ring , Disc spring components and sealing packing are set reasonably. When the pressure and temperature fluctuate, the sealing packing can be adjusted automatically to ensure high safety when the valve stem is working and meet the requirements of environmental protection development; Simple, not easy to leak, good sealing performance, not easy to bend or deform the valve stem, small valve opening and closing torque, convenient maintenance, long service life, stable operation and good practicability.

Embodiment two

Referring to Fig. 3, the second embodiment is to improve the valve seat on the basis of the first embodiment above: the valve ball sealing ring of the inclined-plane combined valve seat is replaced by surfacing welding carbide layer 17, making it a hard-sealed ball valve, That is, the right end surface of the first metal support ring 31 and the left end surface of the second metal support ring 41 are welded with a cemented carbide sealing layer 17 .

The specific description of the present invention in the above-mentioned embodiments is only used to further illustrate the present invention, and can not be interpreted as limiting the protection scope of the present invention. Technical engineers in the field make some non-essential improvements and adjustments to the present invention according to the content of the above-mentioned invention. Into the protection scope of the present invention.

Claims (8)

1. A high-safety die forging ball valve, comprising a valve body (1), the valve body (1) is provided with a valve chamber (11), characterized in that: the upper end of the valve chamber (11) is provided with a valve ball Inlet (12), the valve chamber (11) is provided with a valve ball (2), the left end of the valve ball (2) is provided with a first inclined-plane combined valve seat (3), and the right end of the valve ball (2) is provided with a The second inclined plane combined valve seat (4), the upper end of the valve ball (2) is provided with a positioning boss (21), and the middle part of the positioning boss (21) is vertically provided with a positioning groove (211), so that The positioning boss (21) is provided with a slide block (5), the lower end surface of the slide block (5) is integrally provided with a positioning bump (51), and the positioning bump (51) is inserted into the positioning concave In the groove (211), a spring groove (52) is vertically arranged in the middle of the upper end surface of the slider (5), and a spring assembly (6) is embedded in the spring groove (52). A valve stem (7) is arranged directly above the spring assembly (6), and the lower end of the valve stem (7) presses against the upper end of the spring assembly (6); a valve cover (8) is sleeved on the valve stem (7), so that The valve cover (8) is detachably connected to the valve body (1); the lower end of the valve stem (7) is provided with a valve stem external thread, and the middle part of the valve cover (8) is provided with a valve stem hole (81). The lower end of the stem hole (81) is provided with a bonnet internal thread matching the valve stem external thread, and the bonnet (8) is threadedly connected to the valve stem external thread through the bonnet internal thread. 2. A high-safety die-forged ball valve according to claim 1, characterized in that: the valve body (1) is integrally made, and the inner wall surface of the valve chamber (11) is a slope, so The size of the valve cavity (11) decreases gradually from top to bottom. 3. A high-safety forged ball valve according to claim 2, characterized in that: the first inclined-plane combined valve seat (3) includes a first metal support ring (31), a first valve seat sealing ring (32 ) and the first ball seal ring (33), the first metal support ring (31), the first valve seat seal ring (32) and the first valve ball seal ring (33) are connected to form an integral structure, the first metal The support ring (31) forms a seal between the first valve seat sealing ring (32) and the inner wall of the valve chamber (11), and the first metal support ring (31) passes through the first valve ball sealing ring (33) and the valve ball ( 2) A seal is formed between the outer surfaces. 4. A high-safety forged ball valve according to claim 3, characterized in that: the second inclined-plane combined valve seat (4) includes a second metal support ring (41), a second valve seat sealing ring (42 ) and the second valve ball seal ring (43), the second metal support ring (41), the second valve seat seal ring (42) and the second valve ball seal ring (43) are connected to form an integral structure, the second metal The support ring (41) forms a seal between the second valve seat seal ring (42) and the inner wall of the valve chamber (11), and the second metal support ring (41) passes the second valve ball seal ring (43) and the valve ball ( 2) A seal is formed between the outer surfaces. 5. A high-safety forged ball valve according to claim 1, characterized in that: O-ring seals (9), sealing packing (10) and The packing gland (13), the upper end of the packing gland (13) is provided with a disc spring assembly (14), the upper end of the disc spring assembly (14) is provided with a positioning pressing plate (15), and the positioning pressing plate (15) is connected with The bonnet (8) is secured by bolted connections. 6. A high-safety forged ball valve according to claim 1, characterized in that: a sealing gasket (16) is provided between the valve cover (8) and the valve body (1), and the valve cover (8) It forms a seal with the valve body (1) through a sealing gasket (16), and the valve cover (8) is fixed with the valve body (1) through bolt connection. 7. A high-safety forged ball valve according to claim 1, characterized in that: a medium through hole (22) is provided in the middle of the valve ball (2), and a valve is provided at the left end of the valve ball (2). The left slope of the ball (23), the left slope of the valve ball (23) is inclined to the right from top to bottom; the right end of the valve ball (2) is provided with a right slope of the valve ball (24), and the right slope of the valve ball (24) is from top to bottom Tilt down to the left. 8. A high-safety forged ball valve according to claim 4, characterized in that: the right end surface of the first metal support ring (31) and the left end surface of the second metal support ring (41) are welded with hard Quality alloy sealing layer (17).