CN2184847Y

CN2184847Y - Respirating inlet device

Info

Publication number: CN2184847Y
Application number: CN 93240787
Authority: CN
Inventors: 黄永德
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-28
Filing date: 1993-09-28
Publication date: 1994-12-07
Anticipated expiration: 2003-09-28

Abstract

The utility model relates to a respiration access hole device, which is composed of an access hole barrel body, an exhalation valve and suction valves. The utility model is characterized in that the exhalation valve adopts a weight valve structure. The suction valve also adopts the weight valve structure which is composed of a valve seat, a valve cover and a seal component. In addition, the suction valves are uniformly distributed on the overhanging position of the valve cover of the exhalation valve along the valve seat of the exhalation valve. Because the opening pressure of the exhalation valve is only determined by one factor of the weight of a valve cover or a valve cover assembly, the opening pressure of the exhalation valve can be strictly controlled. The problem that a valve is not closed tightly because the opening pressure loses control can not occur, which plays an important role in the aspects of ensuring the fire proof performance and the explosion proof performance of a storage tank and reducing the escaping and loss of material in the storage tank.

Description

Respirating inlet device

The utility model relates to a kind of tank top that is arranged on, and goes into aperture apparatus by the breathing that the inhalation valve of keeping jar interior normal pressure and the hand-hole cylindrical shell that is connected with tank body are formed.

Inhalation valve among the breathing manhole device comprises exhales valve and inhales valve, exhale valve to come down to make valve seat with the upper limb of hand-hole cylindrical shell, cover plate is made the weighted valve of valve gap, the cracking pressure of valve gap is decided by the weight of valve gap and annex thereof, inhaling valve also is made up of valve seat and valve gap, its valve seat is arranged on the valve gap of exhaling valve, direction down, its valve gap then passes through spring, be pressed on the valve seat, obviously, the cracking pressure of inhaling valve depends mainly on the spring force of spring, because the spring force of spring is with the amount of deformation variation of spring, there is tired problem again in spring, therefore, the aperture of this suction valve valve gap is often unstable, and cracking pressure can change, if spring fatigue, also the situation that valve gap is not closed completely can occur, jar interior material will escape by inhaling the valve evaporation this moment, cause damage.

No matter the purpose of this utility model provides a kind of valve or suction valve of exhaling, it closes all tight, and aperture apparatus is gone in all strict breathing of cracking pressure control.

Breathing the suction valve of exhaling the overhanging edge, position of valve valve gap to exhale uniform at least two covers of valve base to form of aperture apparatus by valve gap and valve seat, the suction valve base is arranged on exhales on the valve valve gap, be directed upwardly, be provided with Sealing at suction valve valve gap with inhaling between the valve base, and inhale the valve valve gap and move along the guide mechanism of forming by guide rod and guide pin bushing.

Further illustrate detailed content of the present utility model below in conjunction with drawings and Examples.

Fig. 1: the structure diagram of breathing aperture apparatus;

Fig. 2: inhale the valve arrangement enlarged view.

As shown in the figure, breathe aperture apparatus and be provided with adpting flange 1 by lower edge, upper limb is provided with the hand-hole cylindrical shell 3 of exhaling valve base 2, exhale valve valve gap 4 and inhale the valve composition, exhaling valve base 2 to be provided with Sealing 5 between the valve valve gap 4 with exhaling, exhale valve valve gap 4 with the relative position of hand-hole cylindrical shell 3 and exhale the positioning and guiding mechanism of valve valve gap 4 moving direction exhaling valve valve gap 4 also to be provided with between with the inwall of hand-hole cylindrical shell 3 to limit, structure characteristic of the present utility model is at the suction valve of exhaling valve valve gap 4 overhanging edges, position to exhale valve base 2 uniform at least two covers to be made up of valve gap 6 and valve seat 7, suction valve base 7 is arranged on exhales on the valve valve gap 4, be directed upwardly, be provided with Sealing 8 with inhaling between the valve bases 7 inhaling valve valve gap 6, and inhale valve valve gap 6 and move along the guide mechanism of forming by guide rod 9 and guide pin bushing 10.In the present embodiment, exhale the Sealing 5 of valve to adopt O type sealed picture, and be placed on and exhale on the valve base 2, the Sealing 8 of inhaling valve is to be lifted on the mylar sheet of inhaling valve valve gap 6 working surfaces, and adopt PTFE to make, the sealing position forms edge of a knife structure and is fitted in the valve seat 7 of exhaling on the valve valve gap 4 makes to inhale valve base, constitutes the sealing configuration of inhaling valve thus; Exhale the positioning and guiding mechanism of valve valve gap 4 to form by positioning contact 11, guide groove 12 and pilot pin 13, wherein positioning contact 11 and guide groove 12 are arranged on and are installed on the leg 17 of exhaling valve valve gap 4, the barrel that pilot pin 13 passes hand-hole cylindrical shell 3 inserts guide groove 12, therefore, aperture apparatus is gone in the breathing of this structure only must extract pilot pin 13, take out inhalation valve, hand-hole cylindrical shell 3 can do to pass in and out for the people hand-hole use of storage tank.As for the tricks of this positioning and guiding mechanism, generally be to determine according to the principle of equilibrium setting, symmetrically arranged quadruplet positioning and guiding mechanism is adopted in this enforcement.In addition, the utility model structurally also has following well designed: the one, consider that this installs open-air requirements of one's work, and be provided with case 14 on the valve valve gap 4 exhaling; The 2nd, exhale valve and inhale valve to be equipped with balancing

weight

15,16, be used for regulating the weight of exhaling valve valve gap 4 and inhaling valve valve gap 6, exhale valve and the requirement of inhaling the various different cracking pressures of valve to adapt to, exhale the balancing weight 15 of valve to be lifted on the central position of case 14, the balancing weight 16 of inhaling valve directly is lifted on to be inhaled on the valve valve gap.

Aperture apparatus is gone in the breathing of said structure, it is exhaled valve and inhales the structure that valve has all adopted weighted valve, the cracking pressure of valve gap is only relevant with factor of weight of valve gap or valve gap assembly, therefore, the cracking pressure of exhaling valve and inhaling valve can obtain strict control, just because of this, also with regard to the suction valve valve gap that can not take place the to cause close problem that is not closed completely because of cracking pressure is out of control, this point is to guaranteeing the burn-proof and explosion prevention performance of storage tank, and the minimizing material escapes loss and has important function.

Claims

1, a kind of breathing manhole device, by the manhole cylindrical shell, exhale valve and inhale the valve composition, wherein the upper limb of manhole cylindrical shell is provided with and exhales valve base, lower edge is provided with Fast connecting flange, exhale the valve valve gap with manhole cylindrical shell relative position and exhale the positioning and guiding mechanism of valve valve gap moving direction with exhaling to be provided with between the valve base to limit exhaling the valve valve gap, feature of the present utility model is: the suction valve of exhaling uniform at least two covers of valve base (2) to be made up of valve gap (6) and valve seat (7) on the edge, overhanging position of exhaling valve valve gap (4), suction valve base (7) is arranged on exhales on the valve valve gap (4), be directed upwardly, be provided with Sealing (8) at suction valve valve gap (6) with inhaling between the valve base (7), and inhale valve valve gap (6) along the guide mechanism motion of forming by guide rod (9) and guide pin bushing (10).

2, aperture apparatus is gone in breathing according to claim 1, it is characterized in that: exhale valve valve gap (4) to be provided with case (14).

3, aperture apparatus is gone in breathing according to claim 1 and 2, it is characterized in that: described suction valve seal (8) is a mylar sheet.

4, aperture apparatus is gone in breathing according to claim 1 and 2, it is characterized in that: exhale valve and inhale valve to be equipped with balancing weight (15,16).

5, aperture apparatus is gone in breathing according to claim 1 and 2, it is characterized in that: exhale valve and inhale valve to be equipped with balancing weight (15,16).