CN111577948A

CN111577948A - Safety valve

Info

Publication number: CN111577948A
Application number: CN202010242816.0A
Authority: CN
Inventors: 陈立龙; 陈卫平; 张明; 谢小白
Original assignee: Hangzhou Worldwise Valve Co ltd
Current assignee: Hangzhou Worldwise Valve Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-08-25
Anticipated expiration: 2040-03-31
Also published as: CN111577948B

Abstract

The invention belongs to the technical field of safety valves, and particularly relates to a safety valve which comprises a valve body and a valve cover fixedly installed on the valve body, wherein a steam exhaust port is formed in the lower end of the side wall of the valve body, a first through hole is formed in the top of the valve body, a valve barrel is installed in the first through hole of the valve body, a valve core penetrates through the valve barrel, a valve rod is arranged on the valve core, a limiting sleeve and a fixed cover are integrally formed, a second through hole is formed in the fixed cover, a limiting table is located in a movable sleeve, the diameter size of the limiting table is larger than the inner diameter size of a clamping ring, a rack is vertically installed on the outer wall of the movable sleeve, a mounting seat is fixedly installed on the fixed cover, a rotating shaft is rotatably installed on the mounting seat, a gear is fixedly installed on the rotating. The purpose is as follows: the problem of current relief valve structure defect lead to artifical maintenance pressure regulating inconvenient, operating personnel arouse the mistake easily to bump when carrying out other relevant operations is solved.

Description

Safety valve

Technical Field

The invention belongs to the technical field of safety valves, and particularly relates to a safety valve.

Background

The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve is mainly used for boiler, pressure container and pipeline, and its control pressure is not greater than specified value, so that it can play important role in protecting personal safety and equipment operation.

Common spring relief valve can adjust according to the pressure value of setting for is automatic, but current relief valve often manual work overhauls the problem that the pressure regulating is inconvenient, operating personnel arouses the mistake easily and bump when carrying out other relevant operations.

Disclosure of Invention

The purpose of the invention is: aims to provide a safety valve for solving the problems that the manual maintenance and pressure regulation caused by the structural defects of the existing safety valve are inconvenient, and the error collision is easily caused when an operator carries out other related operations.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:

a safety valve comprises a valve body and a valve cover fixedly installed on the valve body, wherein a steam outlet is formed in the lower end of the side wall of the valve body, a first through hole is formed in the top of the valve body, a valve barrel is installed in the first through hole of the valve body, a valve core penetrates through the valve barrel, a valve rod is arranged on the valve core, a valve port is formed in the bottom of the valve body, a valve seat is fixedly installed in the valve body at the position of the valve port, the valve core abuts against the valve seat, a connecting table is integrally formed at one end, close to the valve core, of the valve rod, the diameter size of the connecting table is larger than that of the valve rod, a first spring seat, a spring, a second spring seat and a limiting sleeve are sequentially sleeved on the valve rod, the limiting sleeve abuts against the second spring seat, a connecting sleeve is integrally formed on the valve cover, and the valve rod, the upper end of the connecting sleeve is screwed with a fixed cover, the limiting sleeve and the fixed cover are integrally formed, the fixed cover is provided with a second through hole, the central axis of the second through hole is collinear with the central axis of the limiting sleeve, the fixed cover is slidably provided with a movable sleeve, the lower end of the inner wall of the movable sleeve is integrally formed with a snap ring, the free end of the valve rod is fixedly provided with a limit table, the limiting table is positioned in the movable sleeve and positioned above the snap ring, the diameter of the limiting table is larger than the inner diameter of the snap ring, the outer wall of the movable sleeve is vertically provided with a rack, the fixed cover is fixedly provided with an installation seat, the installation seat is rotatably provided with a rotating shaft, the fixed mounting has the gear in the axis of rotation, gear and rack toothing, axis of rotation has the arc handle in mount pad outside fixed mounting, can dismantle between arc handle and the fixed lid and be connected.

Further inject, the spout more than three is seted up to the removal cover outer wall axial, fixed cover fixed mounting has a plurality of support columns, the support column card is established in the spout. Such structural design, through the mutual matching of support column and spout, accomplish the slidable mounting between movable sleeve and the fixed lid, simple structure, convenient to use.

Further limit, the top end of the movable sleeve can be detachably provided with a rubber plug. Such structural design blocks the movable sleeve through the rubber plug, and avoids external dust to enter the movable sleeve through the upper end of the movable sleeve to cause the movable sleeve to be blocked, thereby causing the valve rod to slide unsmoothly in the movable sleeve.

Further inject, the arc handle be two, and be located the mount pad both sides respectively, two fixed mounting has the spliced pole between the arc handle free end, fixed lid lateral wall integrated into one piece has the lug between two arc handles, transversely seted up first via hole on the lug, one of them arc is handled and has been seted up the second via hole, another arc is handled and has been seted up the screw thread through-hole, first via hole, second via hole and screw thread through-hole coaxial line, the spiro union has the butterfly bolt in the screw thread through-hole. Such structural design fixes the arc handle on fixed covering through the butterfly bolt, can avoid the mistake to bump the valve rod case aversion that the arc handle leads to, simple structure, when needs manual quick pressure release, detachable butterfly bolt, arc handle upwards pull can, convenient to use.

Further inject, valve rod free end integrated into one piece has the hexagonal boss, threaded blind hole has been seted up on the hexagonal boss, spacing bench integrated into one piece has the round platform, hexagonal blind hole has been seted up on the round platform, the hexagonal boss card is established in the hexagonal blind hole, spacing bench still sets up the third via hole, third via hole and hexagonal blind hole intercommunication, fixing bolt is worn to be equipped with in the third via hole, fixing bolt spiro union is in the threaded blind hole. Due to the structural design, the limiting table is fixedly arranged on the valve rod through the fixing bolt, so that the structure is simple and the installation is convenient; through the mutual matching of the hexagonal boss and the hexagonal blind hole, the problem that the fixing bolt is not flexible due to the fact that relative rotation occurs between the valve rod and the limiting table when the fixing cover rotates can be avoided.

Further limit, the side wall of the connecting sleeve is radially provided with air holes. Due to the structural design, the spring is cooled through the air vent, and the cooling speed is high.

Further, the upper end of the inner wall of the valve cylinder is integrally formed with a limit ring. Due to the structural design, the maximum upward position of the valve core is limited through the limiting ring, and the problem that the valve core rises excessively due to overlarge pressure in the pipeline and the spring is damaged is avoided.

Further inject, the stop collar lower extreme is frustum shape, set up the toper groove on the second spring holder, the stop collar lower extreme is worn to establish in the toper groove, connect bench upper end also is frustum shape, the toper groove has also been seted up to first spring holder lower extreme. Such structural design through the mutual matching of frustum shape and bell jar, plays the positioning action to first spring holder and second spring holder, guarantees the axiality between valve rod, first spring holder, second spring holder and the stop collar.

The invention adopting the technical scheme has the advantages that:

the fixing cover is in threaded connection with the connecting sleeve, so that the fixing cover only needs to be rotated to a proper position during pressure regulation, and the pressure regulation is convenient;

through the mutual matching of the arc-shaped handle and the valve core, when the safety valve is overhauled, only the butterfly bolt needs to be taken down, and the arc-shaped handle is pulled upwards, so that the overhaul is convenient;

the arc-shaped handle is fixed on the fixing cover through the butterfly bolt, so that the valve core of the valve rod can be prevented from being displaced due to the fact that the arc-shaped handle is touched by mistake, the structure is simple, when manual quick pressure release is needed, the butterfly bolt can be removed, the arc-shaped handle can be pulled upwards, and the use is convenient;

through mutually supporting of gear and rack, when overhauing the relief valve and manual quick pressure, pull arc handle upward movement, can drive the vertical upward movement of valve rod, do not exert radial force to the valve rod, avoid the valve rod at the in-process of overhauing and manual quick pressure of putting, bear radial force and the bending that leads to.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural view of an embodiment of a safety valve according to the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of a safety valve of the present invention;

FIG. 3 is a schematic view of the construction of a fixed cover portion in an embodiment of a safety valve according to the invention;

FIG. 4 is a schematic view of the movable sleeve portion of one embodiment of the safety valve of the present invention;

fig. 5 is an exploded view of a valve stem portion of an embodiment of a safety valve of the present invention;

the main element symbols are as follows:

a valve body 1, a steam exhaust port 11, a valve port 12,

A valve cover 2, a connecting sleeve 21, an air hole 210,

A valve cylinder 3, a limit ring 31,

A valve core 4, a valve seat 41,

The valve rod 5, the connecting table 51, the spring 52, the first spring seat 521, the second spring seat 522, the limit sleeve 523, the hexagonal boss 53,

A fixed cover 6, a second through hole 60, a mounting seat 61, a rotating shaft 62, a gear 63,

A movable sleeve 7, a rack 70, a chute 701, a supporting column 702, a rubber plug 703,

Snap ring 71, limit table 72, round table 721, hexagonal blind hole 722, third via hole 723, fixing bolt 724,

Arc handle 8, spliced pole 80, lug 81, first via hole 810, butterfly bolt 82.

Detailed Description

The present invention will be described in detail with reference to the drawings and specific embodiments, wherein like reference numerals are used for similar or identical parts in the drawings or the description, and implementations not shown or described in the drawings are known to those of ordinary skill in the art. In addition, directional terms, such as "upper", "lower", "top", "bottom", "left", "right", "front", "rear", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 5, the safety valve of this embodiment includes a valve body 1 and a valve cover 2 fixedly mounted on the valve body 1, a steam outlet 11 is formed at a lower end of a side wall of the valve body 1, a first through hole is formed at a top of the valve body 1, a valve barrel 3 is mounted in the first through hole of the valve body 1, a valve core 4 is inserted in the valve barrel 3, a valve rod 5 is disposed on the valve core 4, a valve port 12 is formed at a bottom of the valve body 1, a valve seat 41 is fixedly mounted at a position of the valve port 12 in the valve body 1, the valve core 4 abuts against the valve seat 41, a connecting table 51 is integrally formed at one end of the valve rod 5 close to the valve core 4, a diameter of the connecting table 51 is larger than a diameter of the valve rod 5, a first spring seat 521, a spring 52, a second spring seat and a limiting sleeve 523 are sequentially sleeved on the valve rod 5, the limiting sleeve 523 abuts, The spring 52, the second spring seat 522 and the limit sleeve 523 are all positioned in the connecting sleeve 21, the upper end of the connecting sleeve 21 is screwed with the fixed cover 6, the limit sleeve 523 and the fixed cover 6 are integrally formed, the second through hole 60 is formed in the fixed cover 6, the central axis of the second through hole 60 is collinear with the central axis of the limit sleeve 523, the movable sleeve 7 is slidably mounted on the fixed cover 6, the snap ring 71 is integrally formed at the lower end of the inner wall of the movable sleeve 7, the limit table 72 is fixedly mounted at the free end of the valve rod 5, the limit table 72 is positioned in the movable sleeve 7, the limit table 72 is positioned above the snap ring 71, the diameter size of the limit table 72 is larger than the inner diameter size of the snap ring 71, the rack 70 is vertically mounted on the outer wall of the movable sleeve 7, the mounting seat 61 is fixedly mounted on the fixed cover 6, the rotating shaft 62 is rotatably mounted on the mounting seat 61, the gear 63 is, the arc-shaped handle 8 is detachably connected with the fixed cover 6.

More than three sliding grooves 701 are axially formed in the outer wall of the movable sleeve 7, a plurality of supporting columns 702 are fixedly mounted on the fixed cover 6, and the supporting columns 702 are clamped in the sliding grooves 701. Through mutual matching of the supporting column 702 and the sliding groove 701, sliding installation between the movable sleeve 7 and the fixed cover 6 is completed, and the movable cover is simple in structure and convenient to use.

The top end of the movable sleeve 7 is also detachably provided with a rubber plug 703. The movable sleeve 7 is blocked by the rubber plug 703, so that external dust is prevented from entering the movable sleeve 7 through the upper end of the movable sleeve 7 to block the movable sleeve 7, and the valve rod 5 cannot slide smoothly in the movable sleeve 7.

Arc handle 8 is two, and be located mount pad 61 both sides respectively, fixed mounting has spliced pole 80 between the 8 free ends of two arc handles, and fixed 6 lateral walls of covering integrated into one piece have the lug 81 between two arc handles 8, and first via hole 810 has been seted up transversely on the lug 81, has seted up the second via hole on one of them arc handle 8, has seted up the screw thread through-hole on another arc handle 8, and first via hole 810, second via hole and screw thread through-hole coaxial line, the spiro union has butterfly bolt 82 in the screw thread through-hole. The arc-shaped handle 8 is fixed on the fixing cover 6 through the butterfly bolt 82, the valve core 4 of the valve rod 5, which is caused by mistakenly touching the arc-shaped handle 8, can be prevented from moving, the structure is simple, when manual quick pressure release is needed, the butterfly bolt 82 can be taken down, and the arc-shaped handle 8 can be pulled upwards, so that the use is convenient.

The free end of the valve rod 5 is integrally formed with a hexagonal boss 53, the hexagonal boss 53 is provided with a threaded blind hole, the limiting table 72 is integrally formed with a circular table 721, the circular table 721 is provided with a hexagonal blind hole 722, the hexagonal boss 53 is clamped in the hexagonal blind hole 722, the limiting table 72 is further provided with a third through hole 723, the third through hole 723 is communicated with the hexagonal blind hole 722, a fixing bolt 724 is arranged in the third through hole 723 in a penetrating mode, and the fixing bolt 724 is screwed in the threaded blind hole. The limiting table 72 is fixedly arranged on the valve rod 5 through the fixing bolt 724, so that the structure is simple and the installation is convenient; through the mutual matching of the hexagonal boss 53 and the hexagonal blind hole 722, the problem that the fixing bolt 724 is loosened due to the relative rotation between the valve rod 5 and the limiting table 72 when the fixing cover 6 is rotated can be avoided.

The side wall of the connecting sleeve 21 is radially provided with air holes 210. The spring 52 is cooled through the air holes 210, and the cooling speed is high.

A limit ring 31 is integrally formed at the upper end of the inner wall of the valve cylinder 3. The maximum upward position of the valve core 4 is limited by the limiting ring 31, so that the problem that the valve core 4 rises excessively due to overlarge pressure in the pipeline to cause damage to the spring 52 is avoided.

The lower end of the limiting sleeve 523 is in a frustum shape, a tapered groove is formed in the second spring seat 522, the lower end of the limiting sleeve 523 penetrates through the tapered groove, the upper end of the connecting platform 51 is also in the frustum shape, and the lower end of the first spring seat 521 is also provided with the tapered groove. Through the mutual matching of the frustum shape and the tapered groove, the first spring seat 521 and the second spring seat 522 are positioned, and the coaxiality among the valve rod 5, the first spring seat 521, the second spring seat 522 and the limit sleeve 523 is ensured.

In the embodiment, in the using process, the safety valve can automatically adjust the pressure in the cavity, when the pressure of the valve port 12 reaches a certain value, the valve core 4 can drive the valve rod 5 to move upwards, due to the limiting effect of the spring 52 on the valve rod 5, the valve core 4 can drive the valve rod 5 to overcome the limiting effect of the spring 52 to move upwards only when the pressure reaches a certain value, the valve rod 5 axially slides in the moving sleeve 7, and when the valve rod 5 and the valve core 4 move upwards, the valve port 12 is communicated with the steam exhaust port 11, so that the pressure in the cavity can be adjusted;

the butterfly bolt 82 fixes the arc-shaped handle 8 on the fixed cover 6, so that the displacement of the valve core 4 of the valve rod 5 caused by mistaken touch of the arc-shaped handle 8 is effectively avoided;

when the maintenance is needed, the butterfly bolt 82 is only required to be taken down, the arc-shaped handle 8 is pulled upwards, and whether the valve rod 5 and the valve core 4 can normally move in the axial direction or not is judged, so that the phenomena of blockage, unsmooth movement and the like occur;

in the process of driving the arc-shaped handle 8 of the wrench, the arc-shaped handle 8 drives the gear 63 to rotate anticlockwise, and the gear 63 is meshed with the rack 70 to drive the rack 70 to move vertically upwards so as to drive the movable sleeve 7 to move vertically upwards, so that the valve rod 5 is driven to move vertically upwards;

similarly, when manual quick pressure release is needed, the butterfly bolt 82 can be taken down, the arc-shaped handle 8 is pulled upwards, and the effect of quick steam exhaust and pressure regulation is achieved;

when the set pressure value needs to be changed or the jump pressure value changes along with the accumulation of the service time, the pressing degree of the spring 52 needs to be adjusted, the upper fixing cover 6 only needs to be screwed to a proper position, the device does not need to be disassembled, and the operation is simple and rapid.

The safety valve provided by the invention is described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a safety valve, includes valve body (1) and valve gap (2) of fixed mounting on valve body (1), steam vent (11), its characterized in that have been seted up to the lateral wall lower extreme of valve body (1): the valve comprises a valve body (1), a valve barrel (3) is installed in the first through hole of the valve body (1), a valve core (4) penetrates through the valve barrel (3), a valve rod (5) is arranged on the valve core (4), a valve port (12) is formed in the bottom of the valve body (1), a valve seat (41) is fixedly installed at the position of the valve port (12) in the valve body (1), the valve core (4) abuts against the valve seat (41), a connecting table (51) is integrally formed at one end, close to the valve core (4), of the valve rod (5), the diameter of the connecting table (51) is larger than that of the valve rod (5), a first spring seat (521), a spring (52), a second spring seat (522) and a limiting sleeve (523) are sequentially sleeved on the valve rod (5), the limiting sleeve (523) abuts against the second spring seat (522), and a connecting sleeve (21) is integrally formed on the valve cover (2), the valve rod (5), the first spring seat (521), the spring (52), the second spring seat (522) and the stop collar (523) are all located in the connecting sleeve (21), the upper end of the connecting sleeve (21) is screwed with the fixed cover (6), the stop collar (523) and the fixed cover (6) are integrally formed, the fixed cover (6) is provided with a second through hole (60), the central axis of the second through hole (60) and the central axis of the stop collar (523) are collinear, the fixed cover (6) is provided with the movable sleeve (7) in a sliding manner, the lower end of the inner wall of the movable sleeve (7) is integrally formed with a snap ring (71), the free end of the valve rod (5) is fixedly provided with a stop table (72), the stop table (72) is located in the movable sleeve (7), the stop table (72) is located above the snap ring (71), and the diameter of the stop table (72) is larger than the inner diameter of the snap ring (71, remove vertical rack (70) of installing of cover (7) outer wall, fixed mounting has mount pad (61) on fixed lid (6), rotate on mount pad (61) and install axis of rotation (62), fixed mounting has gear (63) on axis of rotation (62), gear (63) and rack (70) meshing, axis of rotation (62) have arc handle (8) in mount pad (61) outside fixed mounting, can dismantle between arc handle (8) and fixed lid (6) and be connected.

2. A safety valve according to claim 1, wherein: more than three sliding grooves (701) are axially formed in the outer wall of the movable sleeve (7), a plurality of supporting columns (702) are fixedly mounted on the fixed cover (6), and the supporting columns (702) are clamped in the sliding grooves (701).

3. A safety valve according to claim 2, wherein: the top end of the movable sleeve (7) can be also detachably provided with a rubber plug (703).

4. A safety valve according to claim 1, wherein: arc handle (8) are two, and are located mount pad (61) both sides respectively, two fixed mounting has spliced pole (80) between arc handle (8) the free end, fixed lid (6) lateral wall integrated into one piece has lug (81) between two arc handle (8), transversely seted up first via hole (810) on lug (81), one of them second via hole, another have been seted up on arc handle (8) threaded through hole has been seted up on arc handle (8), first via hole (810), second via hole and threaded through hole coaxial line, threaded through hole internal thread connects butterfly bolt (82).

5. A safety valve according to claim 1, wherein: valve rod (5) free end integrated into one piece has hexagonal boss (53), threaded blind hole has been seted up on hexagonal boss (53), integrated into one piece has round platform (721) on spacing platform (72), hexagonal blind hole (722) have been seted up on round platform (721), hexagonal boss (53) card is established in hexagonal blind hole (722), third via hole (723) have still been seted up on spacing platform (72), third via hole (723) and hexagonal blind hole (722) intercommunication, wear to be equipped with fixing bolt (724) in third via hole (723), fixing bolt (724) spiro union is in the threaded blind hole.

6. A safety valve according to claim 1, wherein: air holes (210) are radially formed in the side wall of the connecting sleeve (21).

7. A safety valve according to claim 1, wherein: and a limiting ring (31) is integrally formed at the upper end of the inner wall of the valve cylinder (3).

8. A safety valve according to claim 1, wherein: the lower end of the limiting sleeve (523) is in a frustum shape, a tapered groove is formed in the second spring seat (522), the lower end of the limiting sleeve (523) is arranged in the tapered groove in a penetrating mode, the upper end of the connecting platform (51) is also in the frustum shape, and the tapered groove is also formed in the lower end of the first spring seat (521).