CN211231707U

CN211231707U - On-line switching safety valve

Info

Publication number: CN211231707U
Application number: CN201921661886.9U
Authority: CN
Inventors: 郑子林; 项忠祥; 罗立华; 何维忠; 张永忠
Original assignee: Yongyi Valve Group Co ltd
Current assignee: Yongyi Valve Group Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-08-11
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to an online switching safety valve, which comprises a valve body, a valve seat, a valve clack and a pressure setting device, wherein the valve body is fixedly arranged at the outlet end of the valve seat, the valve clack is positioned in a valve cavity at the outlet end of the valve seat, and the pressure setting device is arranged in the valve cavity at the back of the valve clack; the method is characterized in that: the inlet end of the valve seat is arranged on a switching platform, and the switching platform comprises a switching valve body and a switching device; an inlet pipe is arranged at the lower end of the switching valve body, an installation platform is arranged at the upper end of the switching valve body, at least two through holes are formed in the circumferential direction of the installation platform, and a joint mutually connected with the inlet end of the valve seat is arranged in the plane of the installation platform at the outlet of the through holes. When one safety valve breaks down, the safety valve is closed through the switching device, and the rest safety valves work normally, so that the safety valves are replaced on line without stopping, the continuous work of the system is ensured, and the operation efficiency of the system is improved.

Description

On-line switching safety valve

Technical Field

The utility model relates to a relief valve especially relates to online switching relief valve.

Background

When current relief valve damages in the use, need stop whole equipment, pull down the relief valve and maintain or change, influence production efficiency, moreover, many operating modes do not allow equipment to shut down, in case shut down can cause great economic loss.

Disclosure of Invention

The utility model discloses to the shortcoming that prior art exists, provide a can not shut down online dismantlement, the online relief valve that switches of changing.

The technical scheme of the utility model comprises a valve body, a valve seat, a valve clack and a pressure setting device, wherein the valve body is fixedly arranged at the outlet end of the valve seat, the valve clack is positioned in a valve cavity at the outlet end of the valve seat, the lower end surface of the valve clack is provided with a sealing surface which is mutually matched with the valve seat, and the pressure setting device is arranged in the valve cavity at the back of the valve clack; the method is characterized in that: the inlet end of the valve seat is arranged on a switching platform, and the switching platform comprises a switching valve body and a switching device; an inlet pipe is arranged at the lower end of the switching valve body, an installation platform is arranged at the upper end of the switching valve body, an inlet cavity is formed between the lower end surface of the installation platform and the inlet pipe, at least two through holes are arranged in the circumferential direction of the installation platform, the outlets of the through holes are communicated with the upper plane of the installation platform, the inlets of the through holes are communicated with the inlet cavity, and a joint which is mutually connected with the inlet end of the valve seat is arranged in the upper plane of the installation; the switching device comprises a switching valve clack, an elastic rod, a rotating shaft and a transmission device, wherein the rotating shaft is installed in the center of the installation platform in a dynamic sealing mode, one end of the elastic rod is fixedly connected to the lower end of the rotating shaft, the other end of the elastic rod is fixedly connected with the lower end face of the switching valve clack, and the upper end face of the switching valve clack and the lower end face of the installation platform outside the inlet of the through hole are provided; the transmission device adopts a gear transmission mechanism and comprises a gear box, a driving gear, a driven gear and a transmission rod, the gear box is fixedly arranged in the upper plane of the mounting platform, the transmission rod is arranged on the side wall of the gear box through a bearing positioning device, the driving gear is fixedly arranged at the end part of the transmission rod in the gear box, the end part of the transmission rod outside the gear box is fixedly provided with the transmission wheel, the driven gear is fixedly arranged at the upper end of the rotating shaft, and the driving gear and the driven gear are mutually; an indicating rod extending out of the upper end face of the gear box is arranged in the center of the upper end face of the driven gear, and a pointer is installed on the upper end face of the indicating rod.

Preferably, the lower end face of the mounting platform is provided with a guide groove in the circumferential direction, the groove bottom face of the guide groove is of a wave-shaped structure along the circumference, and the middle part of the elastic rod is provided with a guide rod extending into the guide groove.

Preferably, the driven gear is provided at a lower end thereof with a positioning post which is in movable fit with a positioning hole in the upper plane of the mounting platform outside the rotating shaft, a lower end face thereof is press-fitted into a radial step at the bottom of the positioning hole, and an outer circumferential surface thereof is in movable fit with an inner hole wall of the positioning hole.

Preferably, the valve body is of a cylindrical structure, the pressure setting device comprises a spring and a spring seat, the lower end of the spring is pressed on the back of the valve clack, the upper end of the spring is pressed on the lower end face of the spring seat, the spring seat is connected with the inner thread of the valve body through external threads, the spring seat is provided with pressure relief holes in the upper end and the lower end of the valve body, and the outer side of the sealing surface of the valve clack is provided with a guide rib.

Preferably, the side wall of the switching valve body is provided with a vent hole communicated with the through hole, and a vent screw is installed in the vent hole.

Compared with the prior art, the utility model beneficial effect be have at least two relief valves to improve and switch the platform installation on pipeline or container, when one of them relief valve breaks down, close it through auto-change over device, all the other relief valves normally work, realize online non-stop changing relief valve, ensure system continuous operation, improve system operating efficiency, avoid shutting down the maintenance, change the relief valve and produce economic loss.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view taken along the direction E-E in fig. 1 according to the present invention.

Detailed Description

The online switching safety valve shown in fig. 1 and 2 comprises a valve body 10, a valve seat 8, a valve flap 9 and a pressure setting device, wherein the valve body 10 is fixedly arranged at the outlet end of the valve seat 8, the valve flap 9 is positioned in a valve cavity at the outlet end of the valve seat 8, the lower end surface of the valve flap 9 is provided with a sealing surface mutually matched with the valve seat 8, and the pressure setting device is arranged in the valve cavity at the back of the valve flap 9; the method is characterized in that: the inlet end of the valve seat 8 is arranged on a switching platform, and the switching platform comprises a switching valve body 3 and a switching device; an inlet pipe is arranged at the lower end of the switching valve body 3, the inlet pipe is connected to a pressure pipeline or a container through a flange or welded connection, an installation platform is arranged at the upper end of the switching valve body 3, an inlet cavity 1 is formed between the lower end surface of the installation platform and the inlet pipe, at least two through holes are formed in the circumferential direction of the installation platform, an outlet of each through hole is communicated with the upper plane of the installation platform, an inlet of each through hole is communicated with the inlet cavity 1, and a joint 7 which is mutually connected with an inlet end of a valve seat 8 is arranged in the; the switching device comprises a switching valve clack 5, an elastic rod 4, a rotating shaft 14 and a transmission device, wherein the rotating shaft 14 is installed in the center of the installation platform in a dynamic sealing mode, one end of the elastic rod 4 is fixedly connected to the lower end of the rotating shaft 14, the other end of the elastic rod is fixedly connected with the lower end face of the switching valve clack 5, and sealing faces matched with each other are arranged on the upper end face of the switching valve clack 5 and the lower end face of the installation; the transmission device adopts a gear transmission mechanism and comprises a gear box 21, a driving gear 17, a driven gear 16 and a transmission rod 18, wherein the gear box 21 is fixedly arranged in the upper plane of the mounting platform, the transmission rod 18 is arranged on the side wall of the gear box 21 through a bearing positioning device 20, the driving gear 17 is fixedly arranged at the end part of the transmission rod 18 in the gear box 21, the end part of the transmission rod 18 outside the gear box 21 is fixedly provided with a transmission wheel 19, the driven gear 16 is fixedly arranged at the upper end of the rotating shaft 14, and the driving gear 17 and the driven gear 16 are mutually; an indicating rod 22 extending out of the upper end face of the gear box 21 is provided at the center of the upper end face of the driven gear 16, and a pointer is attached to the upper end face of the indicating rod 22. The valve body 10, the valve seat 8, the valve clack 9 and the pressure setting device form a safety valve device 2, one safety valve device 2 is installed on each connector 7, when one safety valve device 2 fails, the switching valve clack 5 of the switching device seals a through hole at the inlet of the switching device, the safety valve device 2 is detached, maintained or replaced, and the rest safety valve devices 2 continue to work to guarantee continuous work of the system.

The terminal surface is equipped with circumferencial direction's guide way 15 under the mounting platform, and the tank bottom surface of this guide way 15 is for forming wavy structure along the circumferencial direction, and 4 middle parts of elastic rod are equipped with the guide bar that stretches into this guide way 15, and guide bar one end and 4 middle part fixed connection of elastic rod, other end top touch are at the tank bottom surface of guide way 15, and when making switching valve clack 5 leave the through-hole, its sealed face and mounting platform lower terminal surface drop from the contact.

The lower end of the driven gear 16 is provided with a positioning column which is in movable fit with a positioning hole in the upper plane of the mounting platform at the outer side of the rotating shaft 14, the lower end face of the positioning column is pressed in a radial step at the bottom of the positioning hole, and the outer circular surface of the positioning column is in movable fit with the inner hole wall of the positioning hole.

The valve body 10 is of a cylindrical structure, the pressure setting device comprises a spring 11 and a spring seat 12, the lower end of the spring 11 is pressed on the back of the valve clack 9, the upper end of the spring is pressed on the lower end face of the spring seat 12, the spring seat 12 is connected with the inner thread of the valve body 10 through an external thread, the spring seat 12 is provided with a pressure relief hole communicated with the upper end and the lower end, the outer side of the sealing surface of the valve clack 9 is provided with a guide rib in movable fit with the inner cavity wall of.

The side wall of the switching valve body is provided with a discharge hole communicated with the through hole, a discharge screw 6 is arranged in the discharge hole, and when the switching valve clack 5 closes one of the through holes, medium in the through hole is discharged through the discharge screw 6, so that the safety of the disassembly of the safety valve device 2 on the through hole is ensured.

The outer wall of the upper part of the valve body 10 is provided with a circular ring-shaped safety groove 13 with a circular groove arc-shaped section, and when the upper end of the valve body 10 is impacted by external force, the valve body 10 is broken from the circular ring-shaped safety groove 13.

Claims

1. An online switching safety valve comprises a valve body (10), a valve seat (8), a valve flap (9) and a pressure setting device, wherein the valve body (10) is fixedly arranged at the outlet end of the valve seat (8), the valve flap (9) is positioned in a valve cavity at the outlet end of the valve seat (8), and the pressure setting device is arranged in the valve cavity at the back of the valve flap (9); the method is characterized in that: the inlet end of the valve seat (8) is arranged on a switching platform, and the switching platform comprises a switching valve body (3) and a switching device; an inlet pipe is arranged at the lower end of the switching valve body (3), an installation platform is arranged at the upper end of the switching valve body (3), an inlet cavity (1) is formed between the lower end surface of the installation platform and the inlet pipe, at least two through holes are formed in the circumferential direction of the installation platform, the outlets of the through holes are communicated with the upper plane of the installation platform, the inlets of the through holes are communicated with the inlet cavity (1), and a joint (7) which is mutually connected with the inlet end of the valve seat (8) is arranged in the upper plane of the installation; the switching device comprises a switching valve clack (5), an elastic rod (4), a rotating shaft (14) and a transmission device, wherein the rotating shaft (14) is movably and hermetically arranged in the center of the mounting platform, one end of the elastic rod (4) is fixedly connected to the lower end of the rotating shaft (14), the other end of the elastic rod is fixedly connected with the lower end face of the switching valve clack (5), and a sealing surface which is matched with the upper end face of the switching valve clack (5) and the lower end face of the mounting platform outside the inlet of the; the transmission device adopts a gear transmission mechanism and comprises a gear box (21), a driving gear (17), a driven gear (16) and a transmission rod (18), the gear box (21) is fixedly arranged on the upper plane of the mounting platform, the transmission rod (18) is arranged on the side wall of the gear box (21) through a bearing positioning device (20), the driving gear (17) is fixedly arranged at the end part of the transmission rod (18) in the gear box (21), the end part of the transmission rod (18) outside the gear box (21) is fixedly provided with a transmission wheel (19), the driven gear (16) is fixedly arranged at the upper end of the rotating shaft (14), and the driving gear (17) and the driven gear (16) are mutually meshed by; an indicating rod (22) extending out of the upper end face of the gear box (21) is arranged in the center of the upper end face of the driven gear (16), and a pointer is installed on the upper end face of the indicating rod (22).

2. The on-line switching safety valve of claim 1, wherein: the terminal surface is equipped with circumferencial direction's guide way (15) under the mounting platform, and the tank bottom surface of this guide way (15) is for forming wavy structure along the circumferencial direction, and elastic rod (4) middle part is equipped with the guide bar that stretches into this guide way (15), and guide bar one end and elastic rod (4) middle part fixed connection, the tank bottom surface at guide way (15) is touched on the other end top.

3. The on-line switching safety valve according to claim 1 or 2, characterized in that: the lower end of the driven gear (16) is provided with a positioning column which is in movable fit with a positioning hole in the upper plane of the mounting platform at the outer side of the rotating shaft (14), the lower end face of the positioning column is pressed in a radial step at the bottom of the positioning hole, and the outer circular face of the positioning column is in movable fit with the inner hole wall of the positioning hole.

4. The on-line switching safety valve according to claim 1 or 2, characterized in that: the valve body (10) adopts a cylindrical structure, the pressure setting device comprises a spring (11) and a spring seat (12), the lower end of the spring (11) is pressed on the back surface of the valve clack (9), the upper end of the spring is pressed on the lower end surface of the spring seat (12), the spring seat (12) is connected with the inner thread of the valve body (10) through an external thread, the spring seat (12) is provided with a pressure relief hole communicated with the upper end and the lower end, the outer side of the sealing surface of the valve clack (9) is provided with a guide rib movably matched with the inner cavity wall of the valve body (.

5. The on-line switching safety valve according to claim 1 or 2, characterized in that: the side wall of the switching valve body (3) is provided with a discharge hole communicated with the through hole, and a discharge screw (6) is installed in the discharge hole.

6. The on-line switching safety valve of claim 3, wherein: the side wall of the switching valve body (3) is provided with a discharge hole communicated with the through hole, and a discharge screw (6) is installed in the discharge hole.

7. The on-line switching safety valve of claim 4, wherein: the side wall of the switching valve body (3) is provided with a discharge hole communicated with the through hole, and a discharge screw (6) is installed in the discharge hole.