CN2254138Y

CN2254138Y - Safety valve

Info

Publication number: CN2254138Y
Application number: CN 96203774
Authority: CN
Inventors: 董永钏
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-02-28
Filing date: 1996-02-28
Publication date: 1997-05-14
Anticipated expiration: 2006-02-28

Abstract

The utility model relates to a safety valve which is composed of a valve and a valve shifter, and the safety valve can realize the replacement of the valve under the condition that a pressure system has no pressure relief phenomenon. The shifter is provided with a casing body, a cover plate, a valve cover, a rotary disc and two driving mechanisms of the circumferential motion and the axial motion of the valve cover. The valve is fixed on an installation opening of the cover plate; when forming the composite motion through the two driving mechanisms, the valve cover can realize the closing and the opening of a valve opening on the cover plate; when the valve opening is closed by the valve cover, the valve part of the safety valve can be disengaged from the pressure system, and accordingly, the safety valve can be replaced under the condition that the pressure system has no pressure relief phenomenon.

Description

Safety valve

The utility model relates to a kind of safety valve.

Be installed in pop valve and be the valve that container is shielded of just opening the valve pressure release when pressure in pressurized container surpasses safety pressure; therefore; in the process of pressurized container operation, safety valve should be in working state all the time, in case break down; also must change immediately; but, on pressurized container, change the safety valve not a duck soup, at first will the container pressure release; obviously, can cause various losses like this.

The purpose of this utility model provides a kind of safety valve that can change at any time in the pressurized container running.

This safety valve is made up of the shifting facilities of valve and valve, described valve has valve seat, the valve seat pipe, spool, valve rod, valve body, pressure regulating spring and adjustable lever, wherein valve seat is located on the valve seat pipe, valve stem casing is contained in the endoporus with the adjustable lever of valve body screw-thread fit, and be bearing in on the moving spool of joining of valve body, also be provided with valve outlet port on the valve body, the shifting facilities of described valve has the lower end and is provided with the flange connection mouth, the housing that the upper end is sealed by cover plate, fix on the cover board, and stretch into central shaft in the housing, concentricity axle movingly, and end face is provided with the rolling disc in valve rod suit hole, be located at the upper end of valve rod, be contained in the valve rod suit hole by valve stem casing, and will be located at the valve gap of the valve port capping on the cover plate, drive the valve gap circular motion driving mechanism that valve gap rotates around central shaft and drive valve gap along the reciprocating valve gap axial motion in valve rod suit hole driving mechanism, wherein the valve port edge is the circumference uniform distribution at center with the central shaft, the upper end of valve port forms mount inlet, described valve gap circular motion driving mechanism is by the transmission shaft that is bearing on the housing, be fixed on the driving gear of transmission shaft the inner, be fixed on the handwheel of transmission shaft outer end and be arranged on the end face of rolling disc and the face gear composition that meshes with driving gear, described valve gap axial motion driving mechanism is enclosed within on the valve rod by sky, one end is a fulcrum with the support that is located at the rolling disc lower end surface, the pressing plate that the other end fuses with cam follower, the lower end is bearing on the spring seat of being located at rolling disc, the upper end is bearing in the pressure spring of stem lower portion and is arranged on the face cam composition of the ring-type of cover plate lower end surface, and wherein face cam contacts with cam follower.Valve seat Guan Ze is fixed on the mount inlet of cover plate.

The flange connection mouth of safety valve is connected with pressurized container, and load onto other valve or instrument at other mount inlet of cover plate, valve gap is positioned on the lower end surface of cover plate on valve port next door, at this moment, a whole set of pressure system can enter normal operation, when needs are changed safety valve, rotate handwheel, valve gap is promptly with turn disc, simultaneously do downward axial motion again under the promotion of face cam, when treating the valve gap aligned with port, cam follower promptly enters the plane, following rank of face cam under the effect of pressure spring, simultaneously, valve gap is also done axial motion upwards under the effect of pressure spring, and with the valve port sealing, at this moment, the part of the valve of safety valve is thrown off with pressure system, and safety valve can be changed under the situation of not pressure release of pressure system.

Illustrate particular content of the present utility model below in conjunction with drawings and Examples.

Fig. 1: structural drawing of the present utility model;

Fig. 2: the unfolded drawing of face cam.

As shown in the figure, safety valve described in the utility model is made up of the shifting facilities of valve and valve, described valve has valve seat 28, valve seat pipe 29, spool 30, valve rod 31, valve body 32, pressure regulating spring 33 and adjustable lever 34, wherein valve seat 28 is located on the valve seat pipe 29, valve rod 31 is sleeved in the endoporus with the adjustable lever 34 of valve body 32 screw-thread fit, and be bearing in on the valve body 32 moving spools 30 of joining, also be provided with valve outlet port 36 on the valve body 32, the shifting facilities of described valve has the lower end and is provided with flange connection mouth 1, the housing 3 that the upper end is sealed by cover plate 2, be fixed on the cover plate 2, and stretch into central shaft 4 in the housing 3, concentricity axle 4 movingly, and end face is provided with the rolling disc 6 in valve rod suit hole 5, be located at the upper end of valve rod 7, be sleeved in the valve rod suit hole 5 by valve rod 7, and will be located at the valve gap 9 of valve port 8 cappings on the cover plate 2, drive the valve gap circular motion driving mechanism that valve gap 9 rotates around central shaft 4 and drive valve gap 9 along valve rod suit hole 5 reciprocating valve gap axial motion driving mechanisms, wherein valve port 8 edges are the circumference uniform distribution at center with central shaft 4, the upper end of valve port 8 forms mount inlet 10, described valve gap circular motion driving mechanism is by the transmission shaft 11 that is bearing on the housing 3, be fixed on the driving gear 12 of transmission shaft 11 the inners, be fixed on the handwheel 13 of transmission shaft 11 outer ends and be arranged on the end face of rolling disc 6 and face gear 14 compositions that mesh with driving gear 12, described valve gap axial motion driving mechanism is enclosed within on the valve rod 7 by sky, one end is a fulcrum with the support 15 that is located at rolling disc 6 lower end surfaces, the pressing plate 17 that the other end fuses with cam follower 16, the lower end is bearing on the spring seat 18 of being located at rolling disc 6, the upper end is bearing in the pressure spring 19 of valve rod 7 bottoms and is arranged on face cam 20 compositions of the ring-type of cover plate 2 lower end surfaces, and wherein face cam 20 contacts with cam follower 16.The quantity of the mount inlet 10 on the cover plate 2 is decided as required.Need the angle of rotation in order to grasp handwheel 13 exactly, the scale device that one cover is made up of driving gear 21, intermediate gear 22 and passive internal gear 23 can be set in the inboard of handwheel 13, wherein driving gear 21 is fixed on the transmission shaft 11, intermediate gear 22 is bearing on the bonnet 25 that is fixed in housing 3 by jack shaft 24,23 of passive internal gears place bonnet 25 with in the ring track between the protecgulum 26, and the outer surface of passive internal gear 23 is provided with dial 27.29 of valve seats are fixed on the mount inlet 10 of cover plate 2.In addition, valve body 32 can adopt composite structure, valve body 32 is made up of three parts in the present embodiment, and be bolted together by nut 37, top at valve body 32 also is provided with valve bonnet 38, and spool 30 also can adopt composite structure, in the present embodiment, spool 30 is made up of two-part, and forms between two-part and flexibly connect.

Claims

1, a kind of safety valve, it is characterized in that: the shifting facilities by valve and valve is formed, described valve has valve seat (28), valve seat pipe (29), spool (30), valve rod (31), valve body (32), pressure regulating spring (33) and adjustable lever (34), wherein valve seat (28) is located on the valve seat pipe (29), valve rod (31) is sleeved in the endoporus of adjustable lever (34) of same valve body (32) screw-thread fit, and be bearing on the moving spool (30) of joining of same valve body (32), also be provided with valve outlet port (36) on the valve body (32), the shifting facilities of described valve has the lower end and is provided with flange connection mouth (1), the upper end is by the housing (3) of cover plate (2) sealing, be fixed on the cover plate (2), and stretch into central shaft (4) in the housing (3), concentricity axle (4) movingly, and end face is provided with the rolling disc (6) in valve rod suit hole (5), be located at the upper end of valve rod (7), be sleeved in the valve rod suit hole (5) by valve rod (7), and will be located at the valve gap (9) of valve port (8) capping on the cover plate (2), drive the valve gap circular motion driving mechanism that valve gap (9) rotates around central shaft (4) and drive valve gap (9) along the reciprocating valve gap axial motion in valve rod suit hole (5) driving mechanism, wherein valve port (8) edge is the circumference uniform distribution at center with central shaft (4), the upper end of valve port (8) forms mount inlet (10), described valve gap circular motion driving mechanism is by the transmission shaft (11) that is bearing on the housing (3), be fixed on the inner driving gear (12) of transmission shaft (11), be fixed on the handwheel (13) of transmission shaft (11) outer end and be arranged on the end face of rolling disc (6) and face gear (14) composition of same driving gear (12) engagement, described valve gap axial motion driving mechanism is enclosed within on the valve rod (7) by sky, one end is a fulcrum with the support (15) that is located at rolling disc (6) lower end surface, the pressing plate (17) that the same cam follower of the other end (16) fuses, the lower end is bearing on the spring seat (18) of being located at rolling disc (6), the upper end is bearing in the pressure spring (19) of valve rod (7) bottom and is arranged on face cam (20) composition of the ring-type of cover plate (2) lower end surface, wherein the same cam follower of face cam (20) (16) contacts, and valve seat pipe (29) then is fixed on the mount inlet (10) of cover plate (2).