CN1041456C

CN1041456C - Stop valve or diaphragm valve capable of retaining normal open state and allowing pressurized maintenance

Info

Publication number: CN1041456C
Application number: CN95113327A
Authority: CN
Inventors: 俞伯兴; 陈联芝
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-06
Filing date: 1995-11-06
Publication date: 1998-12-30
Anticipated expiration: 2015-11-06
Also published as: CN1128332A

Abstract

The present invention relates to a stop valve or a membrane valve capable of being maintained with pressure in the normal state. The present invention is characterized in that the valve body is provided with a bypass flow passage communicated with a main flow passage; a block mechanism comprises a sealing plate, a slanted guide plate, a left groove-shaped gate plate and a right groove-shaped gate plate, wherein the sealing plate and the slanted guide plate are embedded in parallel in the valve body walls on both sides of an inner hole in which the block mechanism is arranged; the sealing plate and the slanted guide plate are perpendicular to the center line of the main flow passage; the left groove-shaped gate plate and the right groove-shaped gate plate cooperate with the sealing plate and the slanted guide plate so as to realize the maintenance with pressure under the normal state; therefore, the present invention is especially suitable for the occasions of continuous production.

Description

The stop valve or the membrane valve that can keep the allowing pressurized maintenance of normal open state

The present invention relates to a kind of stop valve or membrane valve that is used for the pressure pipe road, but relate in particular to a kind of stop valve or membrane valve that is used for the allowing pressurized maintenance of high-temperature, high pressure fluid pipeline.

At present developed can be in pressure piping the stop valve or the membrane valve of allowing pressurized maintenance, a kind of input that can not need the cut-out pressure fluid that is for example disclosed in the applicant's utility application 95243707.4 can be carried out stop valve or the membrane valve that valve pad is changed or carried out other maintenance work under the band pressure condition, but and a kind of two cutting type stop valves or the membrane valve that is applicable to allowing pressurized maintenance under the high-temperature, high pressure fluid operating conditions that in another utility application 95244769.X of the applicant, is disclosed.They when carrying out allowing pressurized maintenance, valve runner at least, thus for example enter runner or advance, the current drainage road will be blocked to stop pressure fluid and can not continue to keep its mobile working state by valve.Obviously,, do not stop production the requirement when for example some need continuity production occasion in chemical industry is produced in batches but still can not satisfy maintenance though this class stop valve or membrane valve have the convenience of allowing pressurized maintenance.

The purpose of this invention is to provide and a kind ofly when allowing pressurized maintenance, can continue to keep pressurised fluid flow by to guarantee to continue in the whole pressure pipeline system stop valve or the membrane valve of proper functioning.

For realizing above-mentioned purpose of the present invention, a kind of stop valve or membrane valve that keeps the allowing pressurized maintenance of normal open state of the present invention, it comprises: one has the valve gap part of spool, the one valve body part that removably combines with described valve gap, described valve body be formed with enter and discharge sprue and ditch cavity thereof and one and the sprue center line connect the endoporus of described sprue perpendicularly; One is used to block the first blocking-up mechanism and that enters sprue is used to block the second blocking-up mechanism that discharges sprue, the described mechanism that blocks comprises that one seals the end bracket enclosed assembly of described valve body inner bore outer end, one pass described black box gap be arranged on can be operated in the described endoporus turnover reciprocating plug assembly, it is connected with a bott stick by a blockage body and forms, it is characterized in that described valve body has a bypass flow channel that is communicated with described sprue by described endoporus; Each described blocking-up mechanism also comprises: a sealing plate and a tilted guide plate, they are each other parallel and be embedded perpendicularly on the valve body wall of endoporus left and right sides with the sprue center line, and be respectively equipped with the relative runner through hole that is communicated with in the sprue with endoporus, described sealing plate also has a bypass through hole relative with bypass flow channel, the relative inner face of described tilted guide plate is provided with two pairs of guiding cylinders respectively symmetrically on the both sides of the edge of its vertical center line, the inside end of described guiding cylinder slopes inwardly on the plane of angle forming one with the sprue center line; Described blockage body is left and right flute profile flashboard, and each piece comprises an inside side vertical with described runner center line, the outside prism that can join with each cylinder interior edge face wedge that leads and from the recessed conduit of described prism; Described right flute profile flashboard also has conduit through hole relative with described bypass through hole when the propelling of the first blocking-up mechanism.

But adopt the stop valve or the membrane valve of the allowing pressurized maintenance of the above-mentioned pattern of the present invention, because will block mechanism is modified into the structure that the flute profile flashboard matches with sealing plate and tilted guide plate, they can be combined with the by-pass hole of valve body, when allowing pressurized maintenance, not only can accomplish that complete occluding pressure fluid is mobile but also can make pressure fluid keep normal open state, therefore both guaranteed the maintenance safety reliability of valve, and can satisfy continuous operation or the different requirement of interruption work again and improve the performance driving economy on pressural fluid supply line road greatly.

Now also further specify purpose of the present invention, feature and advantage in conjunction with the accompanying drawings by a specific embodiment.

Fig. 1 is the stop valve of the allowing pressurized maintenance that keeps normal open state of the present invention or the plan view after dissecing of membrane valve one preferred embodiment;

Fig. 2 is the plan view of Fig. 1, wherein has the phantom of being got along the D-D line, in order to the right side blocking-up mechanism that the present invention has the normal open structure to be shown;

Fig. 3 be among Fig. 1 embodiment a sealing plate plan view;

Fig. 4 is the sectional view of being got along Fig. 3 A-A line;

Fig. 5 is the plan view of the tilted guide plate among Fig. 1 embodiment;

Fig. 6 is the sectional view of being got along the B-B line of Fig. 5;

Fig. 7 is the plan view of right flute profile flashboard among Fig. 1 embodiment;

Fig. 8 is the sectional view of being got along the C-C line of Fig. 7;

Fig. 9 is the match schematic representation of work of right flute profile flashboard shown in Fig. 7,8 and tilted guide plate shown in sealing plate shown in Fig. 3,4 and Fig. 5,6.

Fig. 1,2 is depicted as the stop valve of the normal pressure maintenance that keeps normal open state of the present invention or a preferred embodiment of membrane valve.As shown in the figure, it comprises: one has the valve gap part 1 of spool; The valve body 2 that one usefulness bolt removably connects by flange, in valve body 2, be formed with enter sprue 3, discharge sprue 4, ditch cavity 9, a bypass flow channel 20, are vertical with described sprue center line and perforation into and out of the lateral bore 21 of

sprue

3,4 and bypass flow channel 20; One is used to block the first blocking-up mechanism that enters sprue 3 and is used to block the second blocking-up mechanism (the second blocking-up mechanism is not shown in the drawings) that discharges sprue 4.Because the first and second blocking-up mechanisms of the present invention remove the equal bilateral symmetry of all the other component of flute profile flashboard (below will be described), so only block mechanism below and described in detail with regard to first.

The described first blocking-up mechanism comprises that the end bracket enclosed assembly of the described endoporus of a sealing 21 outer ends is (owing to be the structure of prior art, described in detail), pass described black box gap and be arranged on the plug assembly that the be operated turnover in the endoporus 21 moves back and forth, it comprises a bott stick 10 and one and the right flute profile flashboard 7 that is rotatably connected of bott stick, as Fig. 2,7, shown in 8, this right side flute profile flashboard have one with the perpendicular inner side surface 11 of sprue center line, one prism 12, from the recessed inwards conduit 13 of described prism 12, be located at the relative end of conduit 13 with bypass flow channel on conduit through hole 14; One sealing plate 5, as shown in Figure 2, it and sprue center line are embedded perpendicularly on endoporus 21 left hand valve body walls, and shown in Fig. 2 to 4, its two ends have one respectively with bypass flow channel 20 with enter the relative through

hole

15,16 of sprue 3; One tilted guide plate 8, as shown in Figure 2, it is embedded on the valve body wall on endoporus 21 right sides, shown in Fig. 2,5 and 6, tilted guide plate inner side surface 17 is provided with two pairs of guiding cylinders 18 symmetrically on its vertical center line both sides of the edge, end face 19 places of each cylinder that leads at grade, this plane becomes the angle that slopes inwardly with the sprue center line, the one end is provided with the through hole relative with entering sprue 23; The inner side surface 11 of described flute profile flashboard 7 and sealing plate outer side surface match, described prism 12 matches with the interior edge face 19 of the guiding cylinder 18 of described tilted guide plate 8 respectively, and Fig. 9 illustrates the opposite planar position relation of sealing plate 5, tilted guide plate 8 and right flute profile flashboard 7.Left side flute profile flashboard (not shown) is not provided with through hole 14, all the other structures and right trough slab 7 symmetries.

Further specify the stop valve of the allowing pressurized maintenance that keeps normal open state of the present invention or the working procedure of membrane valve below.

As shown in Figure 2, when carrying out allowing pressurized maintenance, by an operating device 22 (because of being prior art, specified) right flute profile flashboard 7 is inwardly advanced in endoporus 21, the outer side surface 12 of flute profile flashboard 7 just along the interior edge face 19 oblique slips of guiding cylinder 18 until flute profile flashboard 7 inner side surfaces 11 be adjacent to sealing plate right flank, simultaneously the through hole 14 of flute profile flashboard 7 is relative with the through hole 15 of sealing plate 5; At this moment, though because conduit 13 stops pressure fluid flow and goes into sprue 3, fluid can flow in the bypass flow channel 20 by tilted guide plate through hole 23, endoporus 21, conduit 13, through hole 14 and 15.When left groove flashboard (not shown go out) when being on the pull-out location by operating device 22, pressure fluid just flows out, thereby makes valve be in allowing pressurized maintenance under the normal open state (because of sprue is blocked) from the conduit of left flute profile flashboard, left tilted guide plate through hole; As left flute profile flashboard is advanced, be left flute profile flashboard inclined-plane, the outside along left tilted guide plate guide pillar body interior edge face slide into inwards make its inboard be adjacent to left sealing plate during left surface, bypass flow channel then capable of blocking and discharge runner, can block pressure fluid fully and flow through in the valve this moment.

From as can be known above-mentioned, stop valve of the present invention or membrane valve both can have been realized the allowing pressurized maintenance of two cut-out modes, again can be at the allowing pressurized maintenance that keeps under the normal open state, therefore not only allowing pressurized maintenance is reliable but also applicable to the different use occasions of continuous operation and interrupter duty, thereby enlarged using scope, and two kinds of working state conversion maneuverabilities, easy to operate.

Claims

1. the stop valve or membrane valve that can keep the allowing pressurized maintenance of normal open state, it comprises:

One has the valve gap part of spool;

The one valve body part that removably connects with described valve gap, described valve body be formed with enter and discharge sprue and ditch cavity thereof and one and the sprue center line connect the endoporus of described sprue perpendicularly;

One is used to block the first blocking-up mechanism that enters sprue;

One is used to block the second blocking-up mechanism that discharges sprue; Describedly respectively block end bracket enclosed assembly and that mechanism comprises a sealing described valve body inner bore outer end and pass described black box gap and be arranged in the described endoporus and can be operated the plug assembly that turnover is moved repeatedly, it is connected with a bott stick by a blockage body and forms, and it is characterized in that:

Described valve body has a bypass flow channel that is connected with described sprue by described endoporus; Each described blocking-up mechanism also comprises a sealing plate and a tilted guide plate, they are parallel to each other and are embedded at perpendicularly with the sprue center line respectively and also are provided with the relative runner through hole that is communicated with sprue and endoporus on the described endoporus left and right side valve body wall separately, described sealing plate also is provided with a bypass through hole relative with described bypass flow channel, the relative inner face of described tilted guide plate is provided with two pairs of guiding cylinders respectively symmetrically on the both sides of the edge of its vertical center line, the inside end of described guiding cylinder slopes inwardly on the plane of angle forming one with the sprue center line; Described blockage body is left and right flute profile flashboard, its every comprise one with the perpendicular inside side of described runner center line, an outside prism of joining with each guiding cylinder interior edge face wedge and from the recessed conduit of described prism; Wherein, described right flute profile flashboard also has a conduit through hole relative with hole, described by-pass when the propelling of the first blocking-up mechanism.