阅读说明：本技术 一种双密封结构切换式截止阀 (Double-sealing structure switching type stop valve ) 是由 田洪卫 欧丹 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种双密封结构切换式截止阀,包括阀体和截流机构；阀体的外弧面左端设有第一管体,阀体的外弧面右端设有第二管体,阀体的外弧面上端设有第一法兰盘,第一法兰盘通过螺栓与第二法兰盘固定连接,第二法兰盘的内部设有阀盖,阀盖的下端与阀体的上端接触；截流机构包括支架、螺旋杆、轴承、阀头和手轮,支架设置于阀盖的上侧左右两端,支架上端的螺纹孔内部螺纹连接有螺旋杆,螺旋杆穿过阀盖上端设置的螺纹口并延伸至阀体的内部,螺旋杆通过轴承与阀头的上端转动连接。该双密封结构切换式截止阀,提高装置在工作时的截止效率,装置开启时可首先对装置进行减压操作,使用时可对装置进行高效密封。(The invention discloses a switching type stop valve with a double-sealing structure, which comprises a valve body and a cut-off mechanism; the left end of the outer arc surface of the valve body is provided with a first pipe body, the right end of the outer arc surface of the valve body is provided with a second pipe body, the upper end of the outer arc surface of the valve body is provided with a first flange plate, the first flange plate is fixedly connected with a second flange plate through bolts, a valve cover is arranged inside the second flange plate, and the lower end of the valve cover is in contact with the upper end of the valve body; the intercepting mechanism comprises a support, a screw rod, a bearing, a valve head and a hand wheel, the support is arranged at the left end and the right end of the upper side of the valve cover, the screw rod is connected with the screw rod in a threaded hole in the upper end of the support in a threaded manner, the screw rod penetrates through a threaded opening formed in the upper end of the valve cover and extends to the inside of the valve body, and the screw rod is connected with the upper end of the valve head through the bearing in a rotating manner. This double containment structure switches formula stop valve, the efficiency of ending of improvement device at the during operation can at first carry out the decompression operation to the device when the device is opened, can carry out high-efficient the sealing to the device during the use.)

1. The utility model provides a double containment structure switches formula stop valve which characterized in that: comprises a valve body (1) and an interception mechanism (5);

a first pipe body (2) is arranged at the left end of the outer arc surface of the valve body (1), a second pipe body (3) is arranged at the right end of the outer arc surface of the valve body (1), a first flange plate (17) is arranged at the upper end of the outer arc surface of the valve body (1), the first flange plate (17) is fixedly connected with a second flange plate (18) through bolts, a valve cover (4) is arranged inside the second flange plate (18), and the lower end of the valve cover (4) is in contact with the upper end of the valve body (1);

the intercepting mechanism (5) comprises a support (51), a screw rod (52), a bearing (53), a valve head (54) and a hand wheel (55), wherein the support (51) is arranged at the left end and the right end of the upper side of the valve cover (4); the threaded hole internal thread of support (51) upper end is connected with hob (52), hob (52) pass the screw thread mouth that valve gap (4) upper end set up and extend to the inside of valve body (1), hob (52) are rotated through the upper end of bearing (53) with valve head (54) and are connected, the extrados of valve head (54) is laminated with the inboard of valve body (1), the upper end of hob (52) is equipped with hand wheel (55).

2. The double sealing structure switching type stop valve according to claim 1, wherein: the intercepting mechanism (5) further comprises soft sealing strips (56), the soft sealing strips (56) are respectively arranged inside notches formed in the outer arc surfaces of the valve heads (54), and the outer arc surfaces of the soft sealing strips (56) are all in contact with the inner side of the valve body (1).

3. The double sealing structure switching type stop valve according to claim 1, wherein: still include sealing washer (6) and elastic tube (7), sealing washer (6) set up inside the upper end installing port of valve body (1), the upper end of sealing washer (6) and the lower extreme contact of valve gap (4), elastic tube (7) set up in the lower surface of valve gap (4), the lower extreme of elastic tube (7) and the upper end fixed connection of valve head (54).

4. The double sealing structure switching type stop valve according to claim 1, wherein: still including installation shell (8), draw-in groove (9), interceptor (10) and connecting plate (11), installation shell (8) are established ties in the inside of first body (2), the inside lower extreme of installation shell (8) is seted up in draw-in groove (9), interceptor (10) sliding connection is in the inside upside of installation shell (8), the upper end of interceptor (10) is equipped with connecting plate (11), the upper end of connecting plate (11) passes the sliding frame of installation shell (8) upper wall and extends to the upside of installation shell (8).

5. The double sealing structure switching type stop valve according to claim 4, wherein: still include sealing strip (12), sealing strip (12) set up respectively in inside the mounting groove of closure plate (10) left and right sides, the face of keeping away from of sealing strip (12) respectively with wall contact about installation shell (8).

6. The double sealing structure switching type stop valve according to claim 4, wherein: still include cylinder (13) and extension spring (14), cylinder (13) set up in the upside rear end of installation shell (8), the upper end of cylinder (13) passes the slide opening of connecting plate (11) upside rear end and extends to the upside of connecting plate (11), the extrados of cylinder (13) is located to extension spring (14) cover, the upper end and connecting plate (11) fixed connection of extension spring (14), the lower extreme of extension spring (14) and the upper end fixed connection of installation shell (8).

7. The double sealing structure switching type stop valve according to claim 4, wherein: still include screw rod (15) and nut (16), screw rod (15) set up in the upside front end of installation shell (8), the upper end of screw rod (15) passes the slide opening of connecting plate (11) upside front end and extends to the upside of connecting plate 11, nut (16) threaded connection is in the extrados downside of screw rod (15), the upper end of nut (16) contacts with the lower extreme of connecting plate (11).

Technical Field

The invention relates to the technical field of stop valves, in particular to a double-seal structure switching type stop valve.

Background

The stop valve is also called stop valve, belonging to forced sealing type valve, and can be used for controlling the flow of various fluids of air, water, steam, various corrosive media, slurry, oil product, liquid metal and radioactive media, etc. so that the stop valve is very suitable for cutting off or regulating and throttling equipment, and the stop valve with double-sealing structure is generally used for valve with higher pressure and larger nominal diameter.

However, a general double-seal stop valve is inefficient in stopping a medium when used, is likely to cause a medium leakage when the device is operated, and is difficult to operate when the device being stopped is opened. To this end, a double-sealing switching type shutoff valve is proposed.

Disclosure of Invention

The invention aims to overcome the existing defects and provide a switching type stop valve with a double-sealing structure, so that the stop efficiency of the device during working is improved, the device can be firstly subjected to pressure reduction operation when being opened, the valve opening operation of personnel is facilitated, the device can be efficiently sealed during working, the situation of medium leakage during use of the device is avoided, and the problems in the background art can be effectively solved.

In order to achieve the purpose, the invention provides the following technical scheme: a double-sealing structure switching type stop valve comprises a valve body and a cut-off mechanism;

the left end of the outer arc surface of the valve body is provided with a first pipe body, the right end of the outer arc surface of the valve body is provided with a second pipe body, the upper end of the outer arc surface of the valve body is provided with a first flange plate, the first flange plate is fixedly connected with a second flange plate through bolts, a valve cover is arranged inside the second flange plate, and the lower end of the valve cover is in contact with the upper end of the valve body;

the shutoff mechanism comprises a bracket, a screw rod, a bearing, a valve head and a hand wheel, wherein the bracket is arranged at the left end and the right end of the upper side of the valve cover; the threaded hole internal thread of support upper end is connected with the hob, the hob passes the screw thread mouth that the valve gap upper end set up and extends to the inside of valve body, the hob passes through the bearing and is connected with the upper end rotation of valve head, the outer cambered surface of valve head and the inboard laminating of valve body, the upper end of hob is equipped with the hand wheel.

Further, the closure mechanism further comprises a soft sealing strip, the soft sealing strip is arranged inside a groove opening formed in the outer arc surface of the valve head, and the outer arc surface of the soft sealing strip is in contact with the inner side of the valve body, so that efficient sealing is realized.

Further, still include sealing washer and elastic tube, the sealing washer sets up inside the upper end installing port of valve body, and the upper end of sealing washer contacts with the lower extreme of valve gap, and the elastic tube sets up in the lower surface of valve gap, and the lower extreme of elastic tube and the upper end fixed connection of valve head prevent that the medium from omitting.

The pipe fitting further comprises an installation shell, a clamping groove, an intercepting plate and a connecting plate, wherein the installation shell is connected in series inside the first pipe body, the clamping groove is formed in the lower end of the inside of the installation shell, the intercepting plate is connected to the upper side of the inside of the installation shell in a sliding mode, the connecting plate is arranged at the upper end of the intercepting plate, and the upper end of the connecting plate penetrates through a sliding frame on the upper wall surface of the installation shell and extends to the upper side of the installation shell to achieve secondary interception.

Further, still include the sealing strip, the sealing strip sets up respectively in the mounting groove of the closure plate left and right sides inside, the opposite side of sealing strip respectively with the wall contact about the installation shell, realize high-efficient sealed.

Further, still include cylinder and extension spring, the cylinder sets up in the upside rear end of installation shell, and the upper end of cylinder passes the slide opening of connecting plate upside rear end and extends to the upside of connecting plate, and the extrados of cylinder is located to the extension spring cover, the upper end and the connecting plate fixed connection of extension spring, the lower extreme of extension spring and the upper end fixed connection of installation shell realize that the high efficiency is drawn and is got.

Further, still include screw rod and nut, the screw rod sets up in the upside front end of installation shell, and the upper end of screw rod passes the slide opening of connecting plate upside front end and extends to the upside of connecting plate, and nut threaded connection is in the extrados downside of screw rod, and the upper end of nut contacts with the lower extreme of connecting plate, makes things convenient for personnel to operate.

Compared with the prior art, the invention has the beneficial effects that:

1. when the cutoff operation is carried out, a person rotates a hand wheel, the hand wheel drives a screw rod to rotate downwards, the screw rod drives a valve head to slide downwards through a bearing, the outer arc surface of the valve head blocks the transfusion openings of a first pipe body and a second pipe body, the person twists a nut, the nut moves downwards through a screw rod, the tension force of a tension spring drives a connecting plate to move downwards, the connecting plate drives a cutoff plate to slide downwards in the installation shell until the lower end of the cutoff plate is clamped with a clamping groove, secondary cutoff of media is completed, the sealing strip prevents the media in the installation shell from being omitted, when the device is required to be opened, the nut is firstly twisted, the nut moves upwards through the screw rod, the nut drives the connecting plate to move upwards, the connecting plate drives the cutoff plate to separate from the inside of the clamping groove and slide upwards, and the media are conveyed to the inside of the first pipe body without the cutoff plate, the pressure between the first pipe body and the valve body is reduced, after the valve pressure is increased to a certain level, personnel can more easily operate the intercepting mechanism, the personnel drives the screw rod to rotate upwards through the hand wheel, the screw rod drives the valve head to move upwards through the bearing, so that the medium is recovered to a conveying state, the stop efficiency of the device in work is improved, when the device is opened, the device can be firstly subjected to pressure reduction operation, and the personnel can conveniently operate the device;

2. because the medium is dammed suddenly, part medium spills over along with the valve head easily with the inboard contact point of valve body, at this moment, sealed soft strip carries out multistage separation to the medium, avoid the medium to get into the inside upper end of valve body, when the medium gets into the inside upper end of valve body, the sealing washer carries out high-efficient sealing to the junction of valve body and valve gap, avoid the medium excessive, the elastic tube carries out the separation with the medium, avoid the medium to spill over from the upper end of valve gap, the realization is sealed to the high efficiency of device, the condition of omission takes place during the operation of avoiding damming.

Drawings

FIG. 1 is a schematic sectional view of the present invention

FIG. 2 is an enlarged schematic view of the structure at A of the present invention.

In the figure: 1. the valve comprises a valve body, 2, a first pipe body, 3, a second pipe body, 4, a valve cover, 5, a cut-off mechanism, 51, a support, 52, a screw rod, 53, a bearing, 54, a valve head, 55, a hand wheel, 56, a sealing soft strip, 6, a sealing ring, 7, an elastic pipe, 8, a mounting shell, 9, a clamping groove, 10, a cut-off plate, 11, a connecting plate, 12, a sealing strip, 13, a cylinder, 14, a tension spring, 15, a screw rod, 16, a nut, 17, a first flange plate, 18 and a second flange plate.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-2, the double-sealing switching type stop valve provided in this embodiment includes a valve body 1 and a shut-off mechanism 5; the valve comprises a valve body 1, a valve head 54 and a sealing ring 6, wherein the valve body 1 is provided with an upper mounting opening, the upper mounting opening is provided with a lower mounting opening, the upper mounting opening is in contact with the lower end of the valve cover 4, the sealing ring 6 is arranged in the upper mounting opening, the elastic pipe 7 is arranged on the lower surface of the valve cover 4, and the lower end of the elastic pipe 7 is fixedly connected with the upper end of the valve head 54; the pipe fitting further comprises a mounting shell 8, a clamping groove 9, an intercepting plate 10 and a connecting plate 11, wherein the mounting shell 8 is connected in series inside the first pipe body 2, the clamping groove 9 is formed in the lower end of the inside of the mounting shell 8, the intercepting plate 10 is connected to the upper side of the inside of the mounting shell 8 in a sliding mode, the connecting plate 11 is arranged at the upper end of the intercepting plate 10, and the upper end head of the connecting plate 11 penetrates through a sliding frame on the upper wall surface of the mounting shell 8 and extends to the upper side of the mounting shell 8; the shutoff plate is characterized by further comprising sealing strips 12, wherein the sealing strips 12 are respectively arranged in the mounting grooves on the left side and the right side of the shutoff plate 10, the opposite surfaces of the sealing strips 12 are respectively in contact with the left wall surface and the right wall surface of the mounting shell 8, and the sealing strips 12 avoid the situation that media in the mounting shell 8 are omitted; the installation structure further comprises a column body 13 and a tension spring 14, wherein the column body 13 is arranged at the rear end of the upper side of the installation shell 8, the end head of the upper end of the column body 13 penetrates through a sliding hole at the rear end of the upper side of the connecting plate 11 and extends to the upper side of the connecting plate 11, the tension spring 14 is sleeved on the outer arc surface of the column body 13, the upper end of the tension spring is fixedly connected with the connecting plate 11, and the lower end of the tension spring 14 is fixedly connected with the upper end of the installation shell 8; still include screw rod 15 and nut 16, screw rod 15 sets up in the upside front end of installation shell 8, and the upper end of screw rod 15 passes the slide opening of connecting plate 11 upside front end and extends to the upside of connecting plate 11, and nut 16 threaded connection is in the contact of the lower extreme of the extrados downside and upper end and connecting plate 11 of screw rod 15.

A first pipe body 2 for realizing medium conveying is arranged at the left end of the outer arc surface of the valve body 1, a second pipe body 3 for realizing medium conveying is arranged at the right end of the outer arc surface of the valve body 1, a first flange 17 is arranged at the upper end of the outer arc surface of the valve body 1, the first flange 17 is fixedly connected with a second flange 18 through bolts, and the first flange 17 and the second flange 18 realize the connection effect on the valve body 1 and the valve cover 4; the valve cover 4 is arranged inside the second flange plate 18, the valve cover 4 realizes the installation function of the intercepting mechanism 5, and the lower end of the valve cover 4 is contacted with the upper end of the valve body 1.

The intercepting mechanism 5 comprises a support 51, a screw rod 52, a bearing 53, a valve head 54 and a hand wheel 55, wherein the support 51 is arranged at the left end and the right end of the upper side of the valve cover 4 to realize the supporting and connecting effect on the screw rod 52, the screw rod 52 is in threaded connection with the inside of a threaded hole in the upper end of the support 51, the screw rod 52 penetrates through a threaded hole in the upper end of the valve cover 4 and extends to the inside of the valve body 1, the screw rod 52 is rotatably connected with the upper end of the valve head 54 through the bearing 53, the outer arc surface of the valve head 54 is attached to the inner side of the valve body 1, and the end head of the upper end of the screw rod 52 is provided with the hand wheel 55; the intercepting mechanism 5 further comprises a sealing soft strip 56, the sealing soft strip 56 is respectively arranged inside a groove opening formed in the outer arc surface of the valve head 54, and the outer arc surfaces of the sealing soft strip 56 are all in contact with the inner side of the valve body 1.

The working principle of the invention is as follows:

when the intercepting operation is carried out, a person rotates the hand wheel 55, the hand wheel 55 drives the screw rod 52 to rotate downwards, the screw rod 52 drives the valve head 54 to slide downwards through the bearing 53, at the moment, the outer arc surface of the valve head 54 blocks the transfusion openings of the first pipe body 2 and the second pipe body 3, as the medium is intercepted suddenly, part of the medium is easy to overflow along with the contact point of the valve head 54 and the inner side of the valve body 1, at the moment, the sealing soft strip 56 carries out multi-stage obstruction on the medium, and the medium is prevented from entering the upper end of the inner part of the valve body 1;

when a medium enters the upper end inside the valve body 1, the sealing ring 6 efficiently seals the joint of the valve body 1 and the valve cover 4 to prevent the medium from overflowing, the elastic tube 7 separates the medium to prevent the medium from overflowing from the upper end of the valve cover 4, at this time, a person twists the nut 16, the nut 16 moves downwards through the screw 15, the tension of the tension spring 14 drives the connecting plate 11 to move downwards, the connecting plate 11 drives the shutoff plate 10 to slide downwards inside the mounting shell 8 until the lower end of the shutoff plate 10 is clamped with the clamping groove 9 to finish secondary shutoff of the medium, and the sealing strip 12 prevents the medium inside the mounting shell 8 from being omitted;

when the device is to be opened, firstly, the nut 16 is screwed, the nut 16 moves upwards through the screw 15, the nut 16 drives the connecting plate 11 to move upwards, the connecting plate 11 drives the cut-off plate 10 to separate from the inside of the clamping groove 9 and slide upwards, at this time, the medium is conveyed to the inside of the first pipe body 2 without the separation of the cut-off plate 10, the pressure between the first pipe body 2 and the valve body 1 is reduced, after the valve pressure is increased to a certain level, the cut-off mechanism 5 can be operated more easily, the screw rod 52 is driven to rotate upwards through the hand wheel 55, the screw rod 52 drives the valve head 54 to move upwards through the bearing 53, and the medium is recovered to a conveying state.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.