CN205956479U - Novel volume type relief valve entirely - Google Patents

Abstract

The utility model relates to a novel volume type relief valve entirely, its uide bushing pass through the threaded connection exhaust hood, connect both with the screw as an organic wholely, and the valve rod passes through the threaded connection adjusting sleeve, and adjusting sleeve and exhaust hood initial position are: certain clearance is radially left between the two inside arranging the exhaust hood in the adjusting sleeve lower part, and under axial position guarantees on the lower extreme outer fringe cone of adjusting sleeve circle and exhaust hood aligns in the plane, and the exhaust hood outside is arranged in on adjusting sleeve upper portion, here design solved reseating pressure inaccurate, open and close the too big problem of pressure differential. Additionally, the utility model discloses a spring shield passes through the threaded connection adjustable screw silk, lock sleeve upper portion hole and the outer cooperation from all directions of adjustable screw silk, and lock sleeve lower part inside groove makes set pressure's adjustment operation simple and easy with spring shield boss cooperation, this design, the valve clack center replaces the build -up welding with the valve clack cushion, is favorable to the automatic centering of valve rod, and the valve clack adopts fillet welding seam welding as sealed welding seam with, has simplified valve clack assembly's preparation.

Description

New full-bore type safety valve manufactured

Technical field

This utility model is related to a kind of being used on pressurized equipment, container or pipeline, using medium pressure itself come work Overpressure release safety device, when pressurized equipment, container reach predetermined pressure, discharge steam opened in time by relief valve；Work as pressure When reduction reaches predictable pressure, valve returns seat, makes the operation back to normal of pressurized equipment, container.

Background technology

At present, existing fall lift safety valve, does not design exhaust hood and adjusting sleeve, and blow pressure, blowdown of a safety valve can only lead to Cross adjustment ring to be adjusted, often blow pressure, the performance indications of blowdown of a safety valve do not reach regulation and require, especially open and close pressure Difference is excessive, makes Valved discharge overlong time, discharges medium excessively, causes energy waste；In addition, for the tune adjusting set-pressure It is the locking mode using nut check between whole screw and spring shield, scene is not easy to operate.

Content of the invention

In order to overcome domestic existing fall lift safety valve, blow pressure is inaccurate at work, blowdown of a safety valve is excessive, thus Draw the excessive not easy-operating shortcoming of shortcoming and locking nut scene of steam medium discharge, this utility model provides a kind of new complete Amount type relief valve, this relief valve can not only accurately adjust the size of blow pressure and blowdown of a safety valve moreover it is possible to make adjustment set-pressure Easily operated, its performance indications is better than other like products.

The technical problem that this utility model solves be employed technical scheme comprise that：Main inclusion valve body, fairlead, steam discharge Room, lower spring cup, spring, upper spring seat, adjustment screw, lock sleeve, valve rod, adjusting sleeve, flap, thermal valve lobe, flap cushion block, spray Nozzle type valve, its fairlead is threaded connection exhaust hood, is connected as one exhaust hood with fairlead with screw, and valve rod passes through spiral shell Stricture of vagina connects adjusting sleeve, and adjusting sleeve and exhaust hood initial position are：Adjusting sleeve bottom is placed in inside exhaust hood, radially stays between the two There is certain gap, axial location ensures that on the lower end outer rim cone of adjusting sleeve, circle is alignd with exhaust hood lower plane, adjusting sleeve Top is placed in outside exhaust hood, sees Fig. 2.

Another feature of the present utility model is that spring shield is threaded connection adjustment screw, lock sleeve top endoporus and adjustment Coordinate from all directions outside screw, lock sleeve bottom inside groove is coordinated with spring shield boss, sees Fig. 4 and Fig. 8, Fig. 9.

3rd feature of the present utility model is that flap center flap cushion block replaces built-up welding, and flap and thermal valve lobe adopt angle Welding line, as seal-weld, is shown in Fig. 5.

This design one is, it is to avoid no exhaust hood, in the presence of adjusting sleeve, blow pressure is forbidden, excessive the asking of blowdown of a safety valve Topic, that is, when adjusting blow pressure and the blowdown of a safety valve that upper adjustment ring cannot be satisfied with, can be by adjusting adjusting sleeve and exhaust hood Position to axial, changes flap back pressure, obtains the blow pressure of satisfaction, reduces blowdown of a safety valve it is ensured that full-bore type safety valve manufactured Performance indications；Two are, devise lock sleeve, when adjusting set-pressure, using instrument simply it is easy to operate；Three are, using valve Lobe is easy to valve rod automatic centering with the gap of flap cushion block, makes thermal valve lobe keep good sealing with nozzle type valve seat, and valve Reduce the workload of built-up welding during lobe establishment of component, cost-effective.

The beneficial effects of the utility model are：By ensureing blow pressure accuracy and reducing blowdown of a safety valve, improve safety The serviceability of valve；Simplify the adjustment work of set-pressure, and enable on-line tuning；Improve the sealing of valve, improve valve The make efficiency of lobe assembly.

Brief description

The present invention is further described with example below in conjunction with the accompanying drawings.

Fig. 1 is new full-bore type safety valve manufactured structural representation.

Fig. 2 is to adjust back-pressure structure schematic diagram.

Fig. 3 is full-gear steam flowing distribution schematic diagram.

Fig. 4 is adjustment screw anti-rotating structure schematic diagram.

Fig. 5 is flap modular construction schematic diagram.

Fig. 6 is adjusting sleeve profile.

Fig. 7 is adjusting sleeve top view.

Fig. 8 is lock sleeve profile.

Fig. 9 is lock sleeve top view.

In figure 1. valve body, 2. fairlead, 3. exhaust hood, 4. cooler, 5. lower spring cup, 6. spring, 7. spring shield, 8. go up Spring base, 9. adjustment screw, 10. lock sleeve, 11. valve rods, 12. split pins, 13. adjusting sleeves, 14. gland steam exhausters, 15. screws, 16. Flap, 17. thermal valve lobes, 18. flap cushion blocks, adjustment ring on 19., 20. times adjustment rings, 21. nozzle type valve seats.

Specific embodiment

In the embodiment shown in fig. 1, when high temperature and high pressure steam enters from the air inlet of nozzle type valve seat 21, valve take-off pressure When power is less than set-pressure, rotation moves down adjustment screw 9, increases valve rod 11 active force in valve by upper spring seat 8 compression spring 6 Active force on lobe assembly, equilibrium vapour pressure power acts on the active force on flap assembly, completes the adjustment of set-pressure.When being subject to After in protection device, pressure reaches this utility model set-pressure, valve opening, discharge high temperature and high pressure steam, reach total travel, With the discharge of high temperature and high pressure steam, when steam pressure is not enough to the pressure overcoming spring 6 to give flap assembly, spring 6 leads to Crossing lower spring cup 5 promotes valve rod 11 to fall after rise downwards, and makes flap assembly return seat to nozzle type valve seat 21, valve closing.

In fig. 2, exhaust hood 3 is adopted with fairlead 2 and threadeds, and is connected as exhaust hood 3 with fairlead 2 with screw 15 Integrally.Adjusting sleeve 13 and valve rod 11 adopt threadeds, after the completion of valve performance test, with split pin 12 fixed adjustment set 13 with The relative position of valve rod 11.Initial position is：Adjusting sleeve 13 bottom is placed in inside exhaust hood 3, radially leaves certain between the two Gap, axial location ensure adjusting sleeve 13 lower end outer rim cone on circle align with exhaust hood 3 lower plane, adjusting sleeve 13 Top is placed in outside exhaust hood 3.

In the diagram, adjustment screw 9 is adopted with spring shield 7 and threadeds, after valve set-pressure is adjusted, with lock sleeve 10 Fixed adjustment screw 9 and the relative position of spring shield 7.

In Figure 5, the center of flap 16 replaces built-up welding with flap cushion block 18, adopts interference fits between the two；Flap 16 Adopt with thermal valve lobe 17 and threaded, and with angle welding as seal-weld.

In figure 6 and figure 7, adjusting sleeve 13 is designed to integral barrel shape, bottom cylindrical for cone, lower end inner edge is designed Become female thread；Upper end is designed to equally distributed eight grooves, and the depth of groove is 1/2nd of the whole height of adjusting sleeve.

In figs. 8 and 9, lock sleeve 10 is designed to solid box shape, and top endoporus is to be revolved mutually by anistree in two Turn 22.5 ° of formation, bottom is to have opened an inside groove in annulus, and the width of groove is 1/3rd of annulus external diameter width.

According to the new full-bore type safety valve manufactured of above-mentioned design, not only remain that full-bore type safety valve manufactured emission factor is big, take-off Accurately, all advantages of good airproof performance, but also can more accurately be opened and closed pressure by adjusting adjusting sleeve and adjustment screw Difference, blow pressure, release pressure, make system safe and reliable, on-line tuning is simple.

Claims (5)

1. a kind of new full-bore type safety valve manufactured, mainly by valve body (1), fairlead (2), exhaust hood (3), lower spring cup (5), spring (6), upper spring seat (8), adjustment screw (9), lock sleeve (10), valve rod (11), adjusting sleeve (13), flap (16), thermal valve lobe (17), flap cushion block (18), nozzle type valve seat (21) part composition it is characterised in that：Above use threaded row in fairlead (2) Steam chest (3), with threaded adjusting sleeve (13) on valve rod (11), adjusting sleeve (13) bottom is placed in exhaust hood (3) inside, both Between radially leave certain gap, axial location ensures circle and exhaust hood (3) on the lower end outer rim cone of adjusting sleeve (13) Lower plane aligns.

2. new full-bore type safety valve manufactured according to claim 1 it is characterised in that：Spring shield (7) is threaded connection tune Whole screw (9), lock sleeve (10) top endoporus and adjustment screw (9) all directions cooperation, lock sleeve (10) bottom inside groove and spring outward Cover boss coordinates.

3. new full-bore type safety valve manufactured according to claim 1 it is characterised in that：The center flap cushion block of flap (16) (18) replace built-up welding, flap (16) and thermal valve lobe (17) adopt fillet welding weld seam as seal-weld.

4. new full-bore type safety valve manufactured according to claim 1 it is characterised in that：Adjusting sleeve (13) is integral cylindrical Shape, lower end outer rim is designed to cone, and lower end inner edge is designed to female thread；Upper end is designed to equally distributed eight grooves, groove Depth is 1/2nd of the whole height of adjusting sleeve.

5. new full-bore type safety valve manufactured according to claim 1 it is characterised in that：Lock sleeve (10) is designed to solid box Shape, top endoporus is to be mutually rotatable 22.5 ° by anise in two to be formed, and bottom is to have opened an inside groove, the width of groove in annulus Degree is 1/3rd of annulus external diameter width.