CN206299828U - Sealing structure of high-pressure ball valve - Google Patents

Sealing structure of high-pressure ball valve Download PDF

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Publication number
CN206299828U
CN206299828U CN201621402751.7U CN201621402751U CN206299828U CN 206299828 U CN206299828 U CN 206299828U CN 201621402751 U CN201621402751 U CN 201621402751U CN 206299828 U CN206299828 U CN 206299828U
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China
Prior art keywords
valve
spheroid
output
annular boss
input
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Application number
CN201621402751.7U
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Chinese (zh)
Inventor
马玉山
吴小龙
常占东
李虎生
岳玲
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Wu Zhong Instrument Engineering Service Co Ltd
Wuzhong Instrument Co Ltd
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Wu Zhong Instrument Engineering Service Co Ltd
Wuzhong Instrument Co Ltd
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Priority to CN201621402751.7U priority Critical patent/CN206299828U/en
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Abstract

The utility model is related to industrial valves technical field,More particularly, to a kind of sealing structure of high-pressure ball valve,Including valve body,One end of valve body is provided with input,The other end of valve body is provided with output end,Input is connected with output end,Spheroid is provided with valve body,Spheroid has passage,The passage of spheroid is connected with input and output end,Two valve seats are provided with valve body and input and output end is located at respectively,Two valve seats are contacted with spheroid,Two valve seats,Cavity body is provided between spheroid and valve body,Valve seat is provided with annular boss near output end,Annular boss is located in cavity body,The side of annular boss contacts with spheroid,Annular boss is arranged in parallel with the contact surface of annular boss and spheroid away from the side of contact surface side,The utility model simple structure,It is easy to operate,Effectively raise the sealing property of valve seat,The service life of ball valve is also improved simultaneously.

Description

Sealing structure of high-pressure ball valve
Technical field
The utility model is related to industrial valves technical field, more particularly, to a kind of sealing structure of high-pressure ball valve.
Background technology
Generally all in fluid pressure line or fluid foods conveyance conduit in the industries such as metallurgy, chemical industry, oil, food, medicine Upper setting ball valve.Because ball valve is generally used so that it opens and closes rapid, good seal performance.
The basic structure of ball valve is:One spheroid is set in the inner chamber of valve body, through hole and valve body two ends in the middle of spheroid Import and export conducting, i.e., through hole constitute pipeline in one section;During closing, driven by top valve rod and rotate spheroid, and make ball On through hole central axis it is orthogonal with the cener line of pipeline, pipeline is blocked with the smooth sphere in spheroid both sides; Valve component sealing structure is provided between valve body and spheroid, the sealing structure includes seal valve seat, located at valve body and valve base chamber Ring assembly, by the hard sealing of contact surface between valve seat and spheroid, along with the soft seal between valve seat and valve body, it is ensured that Valve seal.
Existing valve body is closed, and soft seal between valve body and valve seat is when failing, because spheroid is located at it There is certain interval between the two ends of axis of rotation and valve body, the high-pressure medium for being is passed through in valve body, the medium in valve body can be Arrival end reaches the other end of valve body by the gap between valve body and valve seat, and the sealing surface washed away between spheroid and valve seat is led Cause medium to be flowed out by the port of export by the contact surface between spheroid and valve seat, reduce the sealing of valve seat.
Utility model content
The technical problems to be solved in the utility model is:Be closed to solve existing valve body, and valve body with When soft seal between valve seat is failed, because spheroid is located at there is certain interval, valve between the two ends of its axis of rotation and valve body The high-pressure medium for being is passed through in vivo, the medium in valve body can reach valve body in arrival end by the gap between valve body and valve seat The other end, the sealing surface washed away between spheroid and valve seat causes medium to pass through the contact surface between spheroid and valve seat by the port of export Outflow, reduces the problem of the sealing of valve seat, now there is provided a kind of sealing structure of high-pressure ball valve.
The utility model solves the technical scheme that its technical problem used:A kind of sealing structure of high-pressure ball valve, including Valve body, one end of the valve body is provided with input, and the other end of the valve body is provided with output end, and the input and output end connect It is logical, spheroid is provided with the valve body, the passage that the spheroid has passage, the spheroid is connected with input and output end, institute State and be provided with valve body two valve seats and be located at input and output end respectively, two valve seats are contacted with spheroid, two The valve seat, cavity body is provided between spheroid and valve body, the valve seat is provided with annular boss, the convex annular near output end Platform is located in the cavity body, and the side of the annular boss contacts with the spheroid, and the annular boss is away from contact surface one The side of side is arranged in parallel with the contact surface of annular boss and the spheroid.It is high-pressure medium due to what is be passed through in ball valve, When ball valve is closed, and during seal failure between valve seat and valve body, high-pressure medium will be entered by the valve seat of input To in cavity body, and valve seat to output end impacts, so as to cause the seal failure of output end valve seat, by the way that valve body is defeated Go out to hold spheroid arranged in parallel away from the side of spheroid side with the contact surface and annular boss of annular boss on valve seat so that When the seal failure positioned at input valve seat, high-pressure medium is entered into cavity body, and it is remote that high-pressure medium acts on annular boss Active force on contact surface upper side can fit boss with the contact surface of spheroid even closer, the now effect of high-pressure medium Power all will apply on the contact surface, and will not be broken down into the active force on other direction, improve the sealing of valve seat Energy.
In order to prevent valve seat from being influenceed by impurity in medium, cause valve seat to block, influence the sealing property of valve seat, enter one Step ground, the valve body is provided with the blowing pipe connected with the cavity body, and the blowing pipe is provided with away from one end of the valve body Flange terminal pad, blind flange is fixedly connected with the flange terminal pad.By the blowing pipe set on valve body, blowing pipe Connected with cavity body, bubbling device can effectively avoid accumulation at valve seat miscellaneous to being purged between valve body and valve seat Matter, and the sealing of valve seat is had influence on, improve the service life of ball valve.
The beneficial effects of the utility model are:The utility model sealing structure of high-pressure ball valve when in use, due in ball valve What is be passed through is high-pressure medium, and when ball valve is closed, and during seal failure between valve seat and valve body, high-pressure medium will be by The valve seat of input is entered into cavity body, and valve seat to output end impacts, so as to cause the sealing of output end valve seat Failure, by by the contact surface and annular boss of annular boss on valve body output end spheroid and valve seat away from spheroid side side It is arranged in parallel so that when the seal failure positioned at input valve seat, high-pressure medium is entered into cavity body, high-pressure medium Act on annular boss boss can be fitted with the contact surface of spheroid away from the active force on contact surface upper side it is even closer, this When high-pressure medium active force will all apply on the contact surface, and the active force on other direction will not be broken down into, carry The sealing property of valve seat high, the utility model simple structure is easy to operate, effectively raises the sealing property of valve seat, together When also improve the service life of ball valve.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 is the front view of the utility model sealing structure of high-pressure ball valve;
Fig. 2 is the partial enlarged drawing of A in Fig. 1;
Fig. 3 is the force diagram of the valve seat of the utility model sealing structure of high-pressure ball valve.
In figure:1st, valve body, 101, input, 102, output end, 2, spheroid, 201, passage, 3, valve seat, 4, annular boss, 5th, blowing pipe, 6, flange terminal pad, 7, blind flange, 8, cavity body.
Specific embodiment
Presently in connection with accompanying drawing, the utility model is described in more detail.These accompanying drawings are simplified schematic diagram, Basic structure of the present utility model is only illustrated in a schematic way, therefore it only shows the composition relevant with the utility model.
Embodiment
As shown in Figure 1,2 and 3, a kind of sealing structure of high-pressure ball valve, including valve body 1, one end of the valve body 1 is provided with input End 101, the other end of the valve body 1 is provided with output end 102, and input 101 and output end 102 are provided with adpting flange connection Disk 6, for the connection to pipeline, the input 101 is connected with output end 102, and spheroid 2, the ball are provided with the valve body 1 Body 2 has passage 201, by external component spheroid 2 can be controlled to rotate, so as to control passage 201 and the input on spheroid 2 101 are connected and close with output end 102, and the passage 201 of the spheroid 2 is connected with input 101 and output end 102, the valve Two valve seats 3 are provided with body 1 and input 101 and output end 102 is located at respectively, two valve seats 3 connect with spheroid 2 Touch, the contact surface of valve seat 3 and spheroid 2 is sealing surface, two valve seats 3, cavity body 8, position are provided between spheroid 2 and valve body 1 Cavity body 8 is all provided with the two ends of the center of rotation axis of spheroid 2, the valve seat 3 is provided with annular boss near output end 102 4, the annular boss 4 is located in the cavity body 8, and the side of the annular boss 4 contacts with the spheroid 2, the annular Boss 4 is arranged in parallel with the contact surface of annular boss 4 and the spheroid 2 away from the side of contact surface side.
The valve body 1 is provided with the blowing pipe 5 connected with the cavity body 8, and blowing pipe 5 is fixed by way of welding It is connected on valve body 1, and blowing pipe 5 is provided in being close at the valve seat 3 of the side of output end 102, and the blowing pipe 5 is away from institute The one end for stating valve body 1 is provided with flange terminal pad 6, and blind flange 7 is fixedly connected with the flange terminal pad 6.
When in use, the input 101 first in valve body 1 is input into high-pressure medium to above-mentioned sealing structure of high-pressure ball valve, and Now ball valve is closed, that is, passage 201 on spheroid 2 is not connected with input 101 and output end 102, when defeated When entering 101 3 seal failure of valve seat of end, high-pressure medium is entered into cavity body 8, and the valve seat of output end 102 is reached in cavity body 8 3, set because spheroid 2 is parallel to each other with the contact surface and annular boss 4 of annular boss 4 on valve seat 3 away from the side of the side of spheroid 2 Put, high-pressure medium acts on annular boss 4 can be by annular boss 4 and spheroid 2 away from the active force on the side on contact surface Contact surface laminating is even closer, and now the active force of high-pressure medium all will apply on the contact surface, and will not be broken down into Active force on other direction, improves the sealing property of valve seat 3;Due to having impurity in medium, long-term use can be in boss 4 Impurity is piled up at place, is removed by by seal plug, and the flange terminal pad 6 of blowing pipe 5 is connected into bubbling device, in cavity body 8 The impurity of accumulation is purged, and prevents the sealing property of impurity effect valve seat 3, and blind flange 7 seals up blowing pipe 5.
Above-mentioned is enlightenment according to desirable embodiment of the present utility model, by above-mentioned description, relevant staff Various changes and amendments can be carried out in the range of without departing from this utility model technological thought completely.This practicality New technical scope is not limited to the content on specification, it is necessary to determine its according to right technical Scope.

Claims (2)

1. a kind of sealing structure of high-pressure ball valve, including valve body (1), one end of the valve body (1) is provided with input (101), described The other end of valve body (1) is provided with output end (102), and the input (101) connects with output end (102), in the valve body (1) Be provided with spheroid (2), the spheroid (2) with passage (201), the passage (201) of the spheroid (2) and input (101) and defeated Go out end (102) connection, two valve seats (3) are provided with the valve body (1) and input (101) and output end is located at respectively (102), two valve seats (3) contact with spheroid (2), it is characterised in that:Two valve seats (3), spheroid (2) and valve bodies (1) it is provided with cavity body (8) between, the valve seat (3) of two valve seats (3) positioned at output end (102) side is provided with convex annular Platform (4), in the cavity body (8), side and the spheroid (2) of the annular boss (4) connect the annular boss (4) Touch, the annular boss (4) is mutual with the contact surface of annular boss (4) and the spheroid (2) away from the side of contact surface side It is arranged in parallel.
2. sealing structure of high-pressure ball valve according to claim 1, it is characterised in that:The valve body (1) be provided with it is described The blowing pipe (5) of cavity body (8) connection, the blowing pipe (5) is provided with flange terminal pad (6) away from one end of the valve body (1), Blind flange (7) is fixedly connected with the flange terminal pad (6).
CN201621402751.7U 2016-12-20 2016-12-20 Sealing structure of high-pressure ball valve Active CN206299828U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201621402751.7U CN206299828U (en) 2016-12-20 2016-12-20 Sealing structure of high-pressure ball valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201621402751.7U CN206299828U (en) 2016-12-20 2016-12-20 Sealing structure of high-pressure ball valve

Publications (1)

Publication Number Publication Date
CN206299828U true CN206299828U (en) 2017-07-04

Family

ID=59213984

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201621402751.7U Active CN206299828U (en) 2016-12-20 2016-12-20 Sealing structure of high-pressure ball valve

Country Status (1)

Country Link
CN (1) CN206299828U (en)

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