CN210762351U

CN210762351U - Double-sealing pressure relief manhole device

Info

Publication number: CN210762351U
Application number: CN201921733061.3U
Authority: CN
Inventors: 金明聪; 朱其浩; 陈杰
Original assignee: Zhejiang Shang Shi Hua Machinery Co ltd
Current assignee: Zhejiang Shang Shi Hua Machinery Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-06-16
Anticipated expiration: 2029-10-16

Abstract

A double-sealing pressure relief manhole device comprises a connecting flange, a manhole shell, a sealing seat, a valve disc, a guide rod, a stand column, a positioning device A and a positioning device B. Manhole casing passes through the welding mode and sets up in flange's top, is equipped with the seal receptacle on the manhole casing up end, and the seal receptacle includes interior disk seat, outer disk seat, install the valve disc on the seal receptacle, the valve disc includes pressure release valve disc, suction valve disc, and the setting of pressure release valve disc is in the seal receptacle top, is equipped with the guide bar in the pressure release valve disc centre bore, and terminal surface position department fixed mounting has suction valve disc under the guide bar lower extreme corresponds the pressure release valve disc, and the pressure release valve disc up end is equipped with the stand, is equipped with positioner A on the corresponding stand outside position of pressure release valve disc, manhole casing periphery circle symmetry is. The advantages are that: through the setting of seal receptacle, guarantee the double seal nature of pressure release manhole device, through positioner A and positioner B, the pressure release valve disc can not break away from the sealed scope of disk seat when guaranteeing to open and close.

Description

Double-sealing pressure relief manhole device

Technical Field

The utility model relates to an install the emergent ventilation unit of safety on equipment such as petrochemical and storage tank, especially a double containment pressure release manhole device.

Background

The pressure relief manhole device is a safety emergency ventilation device installed on material storage tanks of petroleum, chemical engineering and the like, is usually matched with a fire-retardant breather valve for use, can avoid accidents caused by damage to the storage tank when sudden overpressure or vacuum occurs in the tank due to accidents, and is an ideal device for protecting the safety of the storage tank at present in China. When a sealing valve seat of the conventional pressure relief manhole device is used for a long time, the sealing valve seat is easily damaged, the sealing performance of the pressure relief manhole device cannot be ensured, and the instability of a storage tank matched with the pressure relief manhole device is directly caused; in addition, the outer circumference of manhole casing of current pressure release manhole device below the pressure release valve disc is equipped with the guiding hole corresponding with lead screw usually, and lead screw passes the guiding hole, and the clearance fit between the two, through the setting of lead screw and guiding hole, lead screw can not get the restriction, and the problem of the sealed scope that breaks away from sealed disk seat can appear in the pressure release valve disc when opening and close to influence pressure release manhole device's leakproofness.

Disclosure of Invention

In order to overcome the not enough of prior art existence, the utility model provides a double containment pressure release manhole device, including flange, manhole casing, seal receptacle, valve disc, guide bar, spring holder, guide bar nut, static wire, stand, head, positioner A, positioner B.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the connecting flange is of a flange structure, the connecting flange is matched with the storage tank and the breather valve for use, the manhole shell is arranged above the connecting flange in a welding mode, a sealing seat is arranged on the upper end face of the manhole shell, a valve disc is arranged on the sealing seat and is in sealing fit with the sealing seat, the valve disc comprises a pressure relief valve disc and an inhalation valve disc, the pressure relief valve disc is arranged above the sealing seat, the pressure relief valve disc is in sealing fit with the sealing seat, the center of the pressure relief valve disc is a center hole, breathing holes are uniformly arranged on the outer circumference of the center of the pressure relief valve disc, a guide rod is arranged in the center hole of the pressure relief valve disc, the guide rod is of an inverted T-shaped threaded structure, the inhalation valve disc is fixedly arranged at the position of the lower end face of the guide rod corresponding to the pressure relief valve disc, the inhalation valve disc, a spring seat is arranged above the spring, a guide rod nut is arranged at the upper end of the guide rod, an electrostatic lead is arranged between the pressure relief valve disc and the guide rod, the upper end surface of the pressure relief valve disc is provided with an upright post, the top end of the upright post is fixedly provided with an end enclosure, the end enclosure is of a cover-shaped structure, a positioning device A is arranged at the position of the pressure relief valve disc corresponding to the outer side of the upright post, the positioning device A is composed of a positioning sleeve and a positioning bolt, the positioning sleeve is of a cylindrical structure with a through center, an oval through hole is arranged in the vertical direction of the positioning sleeve, the positioning sleeve is fixed on the upper end surface of the pressure relief valve disc through the positioning bolt, the manhole shell is characterized in that a positioning device B is symmetrically arranged on the outer circumference of the manhole shell along the axial center line of the manhole shell, the positioning device B is composed of a fixing bolt and a sleeve, the sleeve penetrates through an oval through hole of the positioning sleeve in the vertical direction and is in clearance fit with the oval through hole, and the fixing bolt penetrates through the sleeve to fix the sleeve on the outer circumference of the manhole shell.

Furthermore, the seal receptacle includes interior disk seat, outer disk seat, and outer disk seat is located the outside of interior disk seat, all is equipped with annular groove in outer disk seat and the interior disk seat, inlays respectively in the annular groove and is equipped with rubber seal.

Compared with the prior art, the beneficial effects of the utility model are that: through set up interior disk seat at manhole casing up end, outer disk seat, interior disk seat, all inlay in the outer disk seat and be equipped with rubber seal, under the condition that the rubber seal of disk seat damaged including, the leakproofness of pressure release manhole device still can be guaranteed to the rubber seal of outer disk seat, set up positioner B on setting up positioner A and human casing on the pressure release valve disk, automatic back-up of pressure release valve disk when the sharp superpressure of storage tank, after the emergency pressure release, positioner A can get back to the initial position under positioner B's effect, the pressure release valve disk breaks away from the sealed scope of sealed disk seat when preventing to open and close, thereby influence the leakproofness of pressure release manhole device.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an enlarged schematic view of a in the present invention;

in the figure, 1, a connecting flange, 2, a manhole shell, 3, a sealing seat, 31, an inner valve seat, 32, an outer valve seat, 33, a rubber sealing ring, 4, a valve disc, 41, a pressure relief valve disc, 42, a suction valve disc, 5, a guide rod, 6, a spring, 7, a spring seat, 8, a guide rod nut, 9, an electrostatic lead, 10, a stand column, 11, a sealing head, 12, a positioning sleeve, 121, an oval through hole, 13, a positioning bolt, 14, a sleeve, 15 and a fixing bolt.

Detailed Description

The invention will be further described in detail with reference to the accompanying drawings and examples, and a double-sealing pressure relief manhole device comprises a connecting flange 1, a manhole housing 2, a seal seat 3, a valve disc 4, a guide rod 5, a spring 6, a spring seat 7, a guide rod nut 8, an electrostatic lead 9, a column 10, a head 11, a positioning device a and a positioning device B, wherein the connecting flange 1 is of a flange structure, the connecting flange 1 is used with a storage tank and a breather valve in a matching manner, the manhole housing 2 is arranged above the connecting flange 1 in a welding manner, the upper end surface of the manhole housing 2 is provided with the seal seat 3, the seal seat 3 is provided with the valve disc 4, the valve disc 4 and the seal seat 3 are in mutual sealing fit, the valve disc 4 comprises a valve disc 41 and a suction valve disc 42, the pressure relief valve disc 41 is arranged above the pressure relief seal seat 3, the pressure relief valve disc 41 and the seal seat 3 are in, the center of the pressure relief valve disc 41 is a center hole, breathing holes are uniformly formed in the outer circumference of the center of the pressure relief valve disc 41, a guide rod 5 is arranged in the center hole of the pressure relief valve disc 41, the guide rod 5 is of an inverted T-shaped threaded structure, a suction valve disc 42 is fixedly installed at the position, corresponding to the lower end face of the pressure relief valve disc 41, of the lower end of the guide rod 5, the suction valve disc 42 and the pressure relief valve disc 41 form a mutually matched sealing surface under the action of the guide rod 5, a spring 6 is sleeved in the middle of the guide rod 5, a spring seat 7 is installed above the spring 6, a guide rod nut 8 is arranged at the upper end of the guide rod 5, the guide rod nut 8 and the spring seat 7 play a role of fixing the spring 6, an electrostatic lead 9 is arranged between the pressure relief valve disc 41 and the guide rod 5 to prevent the generation of electrostatic sparks, a, the end socket 11 plays a role in fire resistance, a positioning device A is arranged at the position, corresponding to the outer side of the upright post 10, of the pressure relief valve disc 41, the positioning device A is composed of a positioning sleeve 12 and a positioning bolt 13, the positioning sleeve 12 is of a cylindrical structure with a through center, an oval through hole 121 is formed in the vertical direction of the positioning sleeve 12, the positioning sleeve 12 is fixed to the upper end face of the pressure relief valve disc 41 through the positioning bolt 13, a positioning device B is symmetrically arranged on the outer circumference of the manhole shell 2 along the axial center line of the manhole shell, the positioning device B is composed of a sleeve 14 and a fixing bolt 15, the sleeve 14 penetrates through the oval through hole 121 of the positioning sleeve 12 in the vertical direction and is in clearance fit, the fixing bolt 15 penetrates through the sleeve 14 to fix the sleeve 14 on the outer circumference of the manhole shell 2, the pressure relief valve disc 41 is automatically pushed open when the storage, because the limiting action of the sleeve 14 of the positioning device B, the positioning sleeve 12 of the positioning device A is limited and cannot touch the seal head 11, after emergency pressure relief, the positioning device A and the pressure relief valve disc 41 fall back, the positioning action of the fixing bolt 15 of the positioning device B enables the positioning device A to return to an initial position, the pressure relief valve disc 41 is prevented from being separated from the sealing range of the sealing seat 3 when the positioning device B is opened and closed, and therefore the sealing performance of the pressure relief manhole device is affected.

Further, seal receptacle 3 includes interior disk seat 31, outer disk seat 32 is located the outside of interior disk seat 31, all be equipped with the annular groove in outer disk seat 32 and the interior disk seat 31, inlay respectively in the annular groove and be equipped with rubber seal 33, under normal conditions, the pressure release manhole device is sealed through the rubber seal 33 of interior disk seat 31, the rubber seal 33 of outer disk seat 32 plays a prevention guard action, but under the permanent condition of pressure release manhole device live time, the rubber seal 33 of interior disk seat 31 suffers the damage easily, can't guarantee the leakproofness of pressure release manhole device again, the rubber seal 33 of outer disk seat 32 will play the effect of second resealing this moment, can guarantee that pressure release manhole device still has good leakproofness, can not influence the normal use of pressure release manhole device.

The utility model discloses a set up seal receptacle 3 at 2 up ends of manhole casing, seal receptacle 3 includes interior disk seat 31, outer disk seat 32, all be equipped with the annular groove in outer disk seat 32 and the interior disk seat 31, all inlay in the outer disk seat 32 and be equipped with rubber seal 33, under the condition that the rubber seal 33 of interior disk seat 31 damaged, the leakproofness of pressure release manhole device still can be guaranteed to outer disk seat 32's rubber seal 33, set up positioner B on pressure release valve disc 41 on setting up positioner A and human casing, 41 automatic backs-up of pressure release valve disc when the sharp superpressure of storage tank, after the emergency pressure release, positioner A can get back to the initial position under positioner B's the effect, pressure release valve disc 41 breaks away from the seal disk seat's sealing range when preventing to open and close, thereby influence pressure release manhole device's leakproofness.

The working principle is as follows: under the normal working condition of the breather valve, the double-seal pressure relief manhole device basically keeps a sealing state, and the storage tank is at normal pressure; when the normal work of the breather valve cannot meet the requirement of sudden overpressure of the storage tank caused by accidents, a pressure relief valve disc 41 of the pressure relief manhole device is automatically jacked open to carry out emergency pressure relief, so that the pressure in the tank is kept normal; when the pressure in the storage tank is suddenly reduced or is in an ultra-vacuum state, the suction valve disc 42 is opened downwards to suddenly suck the atmosphere under the action of the pressure difference in the storage tank, and the normal pressure in the storage tank is maintained to protect the safety of the storage tank.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A double-sealing pressure relief manhole device comprises a connecting flange, a manhole shell, a sealing seat, a valve disc, a guide rod, a spring seat, a guide rod nut, an electrostatic lead, a stand column, a sealing head, a positioning device A and a positioning device B, wherein the connecting flange is of a flange structure, the manhole shell is arranged above the connecting flange in a welding mode, the sealing seat is arranged on the upper end face of the manhole shell, the valve disc is mounted on the sealing seat and comprises a pressure relief valve disc and an inhalation valve disc, the pressure relief valve disc is arranged above the sealing seat, the center of the pressure relief valve disc is a central hole, breathing holes are uniformly formed in the outer circumference of the center of the pressure relief valve disc, the guide rod is arranged in the central hole of the pressure relief valve disc, the lower end face of the guide rod corresponds to the pressure relief valve disc, the, the guide bar upper end is equipped with the guide bar nut, be equipped with the static wire between pressure release valve disc and the guide bar, pressure release valve disc up end is equipped with the stand, and stand top fixed mounting has head, its characterized in that: the seal receptacle includes interior disk seat, outer disk seat, be equipped with positioner A on the corresponding stand outside position of pressure release valve disc, positioner A comprises position sleeve, positioning bolt, the position sleeve is the penetrating cylinder structure in center, has seted up oval through-hole in the vertical direction of position sleeve, and the position sleeve passes through positioning bolt to be fixed at pressure release valve disc up end, manhole casing periphery circle is equipped with positioner B along its axial direction central line symmetry, and positioner B comprises fixing bolt, sleeve, the sleeve passes oval through-hole and the clearance fit of position sleeve in the vertical direction, and fixing bolt passes the sleeve and fixes the sleeve on manhole casing periphery circle.

2. The double seal pressure relief manhole device according to claim 1, wherein: the outer valve seat is positioned on the outer side of the inner valve seat, annular grooves are formed in the outer valve seat and the inner valve seat, and rubber sealing rings are embedded in the annular grooves respectively.