CN215861921U

CN215861921U - Novel safety valve

Info

Publication number: CN215861921U
Application number: CN202120530371.6U
Authority: CN
Inventors: 万胜军; 李大猛; 王立新; 李岩; 贾建波; 金名禄; 赵银龙; 冯哲
Original assignee: Harbin Power Plant Valve Co ltd
Current assignee: Harbin Power Plant Valve Co ltd
Priority date: 2021-03-10
Filing date: 2021-03-10
Publication date: 2022-02-18
Anticipated expiration: 2031-03-10

Abstract

The utility model relates to a novel safety valve which is used in the fields of electric power, new energy, petrifaction and the like. The valve comprises a valve body, a valve seat, an adjusting ring, a recoil disc, a screw, a bolt, a nut, a lower spring seat, a valve rod, a spring, an upper spring seat, an adjusting screw, a small cover, a guide sleeve, a stroke ring, an elastic cylindrical pin, a steel ball and a valve clack. The valve clack and the valve rod head are provided with spherical circles R, the steel ball is in spherical contact with the valve clack and the valve rod, and the valve clack, the steel ball and the valve rod are connected together through an elastic cylindrical pin; the valve clack and the recoil disc are provided with corresponding bosses for axial positioning and are connected through two screws. The middle part of the valve rod is provided with a spherical circle R which is contacted with the spherical surface of the lower spring seat. The valve has simple structure and convenient assembly and maintenance. The valve has the advantages that the manufacturing cost of key parts is reduced, the spring force is ensured to vertically and uniformly act on the sealing surface of the valve clack, and the valve achieves good sealing performance. The opening and closing pressure difference of the valve can be effectively adjusted between 4% and 10% by changing the position of the adjusting ring.

Description

Novel safety valve

Technical Field

The utility model relates to a novel safety valve, and belongs to valves used in the fields of electric power, new energy, petrifaction and the like.

Background

Safety valves required in the fields of electric power, new energy, petrifaction and the like in China have high performance index requirements, the valves are tightly sealed in a closed state, and the opening and closing pressure difference is adjustable between 4% and 10%. At present, the high-end safety valve at home and abroad has a complex structure, the valve is provided with an upper adjusting ring, a lower adjusting ring, a back pressure adjusting sleeve, a steam exhaust chamber, a valve clack sleeve and other parts, the manufacturing process requirement of key parts is higher, and the manufacturing cost of products is high. Meanwhile, the technical level of operators is high in the work requirements of valve assembly, maintenance and the like. The existing high-end safety valve has the problems of high cost, high maintenance difficulty, low cost performance and the like.

Disclosure of Invention

The utility model aims to provide a novel safety valve which is simple in structure, low in maintenance cost and excellent in sealing performance.

The technical scheme of the utility model is to provide a novel safety valve which comprises a valve body, a valve seat, an adjusting ring, a recoil disc, a screw, a bolt, a nut, a lower spring seat, a valve rod, a spring, an upper spring seat, an adjusting screw, a small cover, a guide sleeve, a stroke ring, an elastic cylindrical pin, a steel ball and a valve clack. The valve clack and the steel ball are in spherical contact, and the steel ball and the valve rod are also in spherical contact, so that the spring force is ensured to act on the sealing surface of the valve clack uniformly and vertically. The valve clack, the steel ball and the valve rod are connected together through an elastic cylindrical pin, and the valve clack and the recoil disc are connected together through two screws. The valve seat is provided with an adjusting ring, the relative position between the adjusting ring and the recoil disc is changed, the reaction force of the medium to the valve clack can be adjusted, and the opening and closing pressure difference of the valve is adjusted between 4% and 10%.

The valve clack is internally provided with a spherical SR1, the radius of the steel ball is SR4, and the SR1 is more than or equal to SR4+0.5 mm; the excircle of the valve clack is provided with a groove A and a boss A, and the upper end of the valve clack is provided with a pin hole d 1.

The valve rod head is provided with a spherical SR2 and a pin hole d3, the middle part of the valve rod is provided with a spherical SR3, and the spherical SR2 of the valve rod head is more than or equal to the radius SR4+0.5mm of a steel ball. The middle part of the valve rod is provided with a spherical SR3 which is in contact with the spherical surface of the lower spring seat, so that the manufacturing deviation of the spring is eliminated.

The upper end of the recoil disc is provided with a groove B, the height H of the groove B is M +2mm, and the groove B and the center line of the groove A are positioned at the same position; two screw holes M are symmetrically arranged at the groove B of the backflushing disc; the recoil disc is provided with a boss B corresponding to the valve clack boss A, and the recoil disc is axially limited.

The elastic cylindrical pin is a hollow cylinder, and the outer diameter d2 is d1+0.1 mm; two ends of the elastic cylindrical pin are cones with an angle a, and a is less than or equal to 30 degrees; the cylinder is provided with a through opening h in the axial direction.

The utility model has the beneficial effects that: according to the novel safety valve disclosed by the utility model, only the adjusting ring, the valve clack, the steel ball, the recoil disc, the stroke ring and the guide sleeve are arranged in the valve body cavity, so that the valve is simple in structure and convenient to assemble and maintain. The valve rod is connected with the valve clack by a steel ball, and the valve rod is in spherical contact with the lower spring seat, so that the manufacturing cost of key parts is reduced, and the spring force is ensured to act on the sealing surface of the valve clack vertically and uniformly, so that the valve achieves good sealing performance. The opening and closing pressure difference of the valve can be effectively adjusted by changing the position of the adjusting ring.

Drawings

FIG. 1 is a schematic view of a novel safety valve

FIG. 2 is a schematic view of a partial structure of a novel safety valve

FIG. 3 is a schematic view of the structure of the valve flap

FIG. 4 is a schematic view of the structure of the kick plate

FIG. 5 is a schematic view of the structure of the elastic cylindrical pin

FIG. 6 is a schematic view of the valve stem construction

In the figure, 1, a valve body, 2, a valve seat, 3, an adjusting ring, 4, a recoil disc, 5, a screw, 6, a bolt, 7, a nut, 8, a lower spring seat, 9, a valve rod, 10, a spring, 11, an upper spring seat, 12, an adjusting screw, 13, a small cover, 14, a guide sleeve, 15, a stroke ring, 16, an elastic cylindrical pin, 17, a steel ball and 18, a valve clack

Detailed Description

In the embodiment shown in fig. 1 and 2, the utility model provides a novel safety valve, which comprises a valve body 1, a valve seat 2, an adjusting ring 3, a recoil disc 4, a screw 5, a bolt 6, a nut 7, a lower spring seat 8, a valve rod 9, a spring 10, an upper spring seat 11, an adjusting screw 12, a small cover 13, a guide sleeve 14, a stroke ring 15, an elastic cylindrical pin 16, a steel ball 17 and a valve clack 18. The steel ball 17 is respectively in spherical contact with the valve clack 18 and the valve rod 9, and the valve clack, the steel ball and the valve rod are connected together through an elastic cylindrical pin. The valve clack and the recoil disc are connected together by two screws, the valve seat is provided with an adjusting ring, the relative position between the adjusting ring and the recoil disc is changed, and the opening and closing pressure difference of the valve can be adjusted between 4 percent and 10 percent.

As shown in fig. 3 and 4, a spherical SR1 is arranged inside the valve clack 18 and contacts with a steel ball 17, the radius of the steel ball is SR4, and SR1 is larger than or equal to SR4+0.5 mm; the excircle of the valve clack is provided with a groove A and a boss A, and the upper end of the valve clack is provided with a pin hole d 1. The upper end of the recoil disc 4 is provided with a boss B corresponding to the boss A of the valve clack 18, and the recoil disc 4 is axially positioned; the recoil disc 4 is provided with a groove B, the height H of the groove B is M +2mm, and the groove B and the center line of the groove A are positioned at the same position; two screw holes M are symmetrically arranged at the groove B of the backflushing disc 4; screw 5 is installed at screw hole M, and screw 5 is screwed into recess A of valve clack.

As shown in figures 5 and 6, the head of the valve rod 9 is provided with a spherical SR2 and a pin hole d3, and the spherical SR2 of the head of the valve rod 9 is larger than or equal to the radius SR4+0.5mm of a steel ball. The elastic cylindrical pin 16 is a hollow cylinder, and the outer diameter d2 is equal to the valve clack pin hole d1+0.1 mm; the valve rod 9 is provided with a pin hole d3, and the pin hole d3 of the valve rod 9 is more than or equal to the valve clack pin hole d1+1 mm; the two ends of the elastic cylindrical pin 16 are provided with cones with an angle a which is less than or equal to 30 degrees, and the cylinders are provided with through openings h in the axial direction for convenient installation. The middle part of the valve rod is provided with the spherical SR3 which is in spherical contact with the lower spring seat 8, so that the manufacturing deviation of the spring 10 is eliminated, and the sealing performance of the valve is improved.

Claims

1. A novel safety valve comprises a valve body (1), a valve seat (2), an adjusting ring (3), a recoil disc (4), a screw (5), a bolt (6), a nut (7), a lower spring seat (8), a valve rod (9), a spring (10), an upper spring seat (11), an adjusting screw (12), a small cover (13), a guide sleeve (14), a stroke ring (15), an elastic cylindrical pin (16), a steel ball (17) and a valve clack (18); the method is characterized in that: the valve clack (18), the steel ball (17) and the valve rod (9) are connected by an elastic cylindrical pin (16), and the valve clack (18) and the recoil disc (4) are connected together by two screws (5).

2. A new safety valve according to claim 1, characterized in that: a spherical SR1 is arranged inside the valve clack (18), the radius of the steel ball (17) is SR4, and the SR1 is more than or equal to SR4+0.5 mm; the valve clack (18) is provided with a groove A and a boss A, and the upper end of the valve clack (18) is provided with a pin hole d 1.

3. A new safety valve according to claim 1, characterized in that: the head of the valve rod (9) is provided with a spherical SR2 and a pin hole d3, the middle of the valve rod is provided with a spherical SR3, and the SR2 is larger than or equal to SR4+0.5 mm.

4. A new safety valve according to claim 1, characterized in that: the upper end of the recoil disc (4) is provided with a groove B, and the height H of the groove B is equal to M +2 mm; two screw holes M are symmetrically arranged at the groove B of the backflushing disc (4); the recoil disc (4) is provided with a boss B corresponding to the boss A of the valve clack (18).

5. A new safety valve according to claim 1, characterized in that: the elastic cylindrical pin (16) is a hollow cylinder, the outer diameter d2 is d1+0.1mm, and the valve rod pin hole d3 is larger than or equal to d1+1 mm; cones with the angle of a are arranged at the two ends of the elastic cylindrical pin (16), and the angle of a is less than or equal to 30 degrees; the cylinder is provided with an opening h in the axial direction.