CN215059967U - Fixed high-pressure gate valve seal structure - Google Patents
Fixed high-pressure gate valve seal structure Download PDFInfo
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- CN215059967U CN215059967U CN202120956089.4U CN202120956089U CN215059967U CN 215059967 U CN215059967 U CN 215059967U CN 202120956089 U CN202120956089 U CN 202120956089U CN 215059967 U CN215059967 U CN 215059967U
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Abstract
The utility model relates to a fixed high-pressure gate valve sealing structure, which comprises a valve body, a valve cover and a valve rod, wherein the lower end of the valve rod longitudinally penetrates through the valve cover and is arranged in the valve body, a throttling sleeve, a filler and a filler pressing sleeve are sequentially arranged between the valve cover and the valve rod from bottom to top, a filler pressing plate is arranged above the filler pressing sleeve, and the outer side end of the filler pressing plate tightly presses the filler by the filler pressing sleeve through the fastening of a plurality of first stud bolts which are distributed in an equal circumference; a self-sealing gasket and a backing ring are sequentially arranged between the outer side end of the valve cover and the inner wall of the valve body from bottom to top, and a second nut locks a second stud and is matched with the four open rings, so that the valve cover is prevented from being connected unstably due to fluctuating pressure in the valve cavity. The utility model has the advantages of as follows: the connection stability of the valve cover and the valve body is ensured, and leakage caused by unstable connection of the valve cover, the self-sealing gasket and the backing ring due to pressure fluctuation in the valve cavity is prevented.
Description
The technical field is as follows:
the utility model belongs to the gate valve field, concretely relates to fixed high-pressure gate valve seal structure.
Background art:
in high-pressure and high-temperature systems, high-pressure gate valves are often used, the opening and closing parts of the high-pressure gate valves are flashboards, the moving directions of the flashboards are perpendicular to the fluid direction, and the gate valves can only be fully opened and fully closed and cannot be adjusted and throttled. The high-pressure gate valve belongs to a forced sealing type valve, when the valve is closed, the sealing surface of the gate plate is forced to press towards the valve seat on the other side by means of external force to ensure the sealing performance of the sealing surface, in order to avoid leakage of media in the high-pressure gate valve, the sealing structure is a vital structure in the high-pressure gate valve, the valve rod and the valve cover are sealed by the packing, the valve cover and the valve body are sealed by the sealing gasket, but the sealing effect is poor due to the friction force of the valve rod and the packing and the thrust generated by the pressure of the media.
The utility model has the following contents:
the utility model aims at overcoming the not enough above, provide a fixed high-pressure gate valve seal structure, guarantee the stability of being connected of valve gap and valve body, prevent because the fluctuation of valve pocket internal pressure, and make the valve gap, connect the outer hourglass that arouses from the unstability of sealed pad, backing ring.
The purpose of the utility model is realized through the following technical scheme: a fixed high-pressure gate valve sealing structure comprises a valve body, a valve cover and a valve rod, wherein the lower end of the valve rod longitudinally penetrates through the valve cover and is arranged in the valve body, a throttling sleeve, a packing pad, packing and a packing pressing sleeve are sequentially arranged between the valve cover and the valve rod from bottom to top, a packing pressing plate is arranged above the packing pressing sleeve, the outer side end of the packing pressing plate is fastened through a plurality of first stud bolts distributed in an equal circumference mode to tightly press the packing by the packing pressing sleeve, the lower end of each first stud bolt is in threaded connection with the valve cover, and the upper end of each first stud bolt protrudes out of the packing pressing plate and is connected with a first nut;
the outside end of valve gap and the valve body inner wall from supreme self-sealing pad, the backing ring of having in proper order down between, the position that the valve body inner wall is close to the backing ring inlays and is equipped with the four-ring opening, four-ring opening and backing ring contact, the upside cover of valve gap is equipped with the clamp plate, the outside lower extreme and the valve body cooperation of clamp plate, and vertically run through the clamp plate and have a plurality of second stud to the valve gap, the lower extreme of second stud is arranged in the valve gap, the upper end protrusion of second stud is in the clamp plate and is connected with the second nut, thereby second nut locking second stud prevents the valve gap from receiving the unstable connection that the inside undulant pressure of valve pocket and arouse with the clamp plate cooperation.
The utility model discloses a further improvement lies in: the valve rod is connected with the actuator through the support to realize the up-and-down movement in the valve body, and the support is arranged above the pressing plate and the valve body and is fixedly connected with the valve body through a plurality of stud bolts.
The utility model discloses a further improvement lies in: a sealing cavity in which a self-sealing gasket and a gasket ring are embedded is arranged between the outer side end of the valve cover and the inner wall of the valve body.
The utility model discloses a further improvement lies in: one side of the four open rings is embedded in the valve body, the lower ends of the four open rings are embedded in the sealed cavity, and the upper ends of the four open rings are provided with step parts so as to realize clamping with the inner wall of the valve body.
Compared with the prior art, the utility model has the following advantage:
1. the upside cover of valve gap is equipped with the clamp plate, the outside lower extreme and the valve body cooperation of clamp plate, and vertically run through the clamp plate and have a plurality of second stud to the valve gap, the lower extreme of second stud is arranged in the valve gap, the upper end protrusion in the clamp plate of second stud is connected with the second nut, second nut locking second stud, make the valve gap, from sealed the pad ring, the valve body, the clamp plate forms integral connection structure, prevent because the fluctuation of valve pocket internal pressure, and make the valve gap, from sealing up, the outer hourglass that the unstable connection of pad ring caused.
2. The utility model discloses set up the seal structure form from sealed pad, backing ring and four ring-opening between valve gap and valve body, four ring-opening set up pressure promotion valve gap upward movement in effectively preventing the gate valve, guarantee the stability of being connected between valve gap and the valve body, guarantee the leakproofness between valve gap and the valve body again under the effect from sealed pad and backing ring.
3. Seal up through throttle cover, packing pad, packing medium in to the gate valve between valve rod and the valve gap, packing clamp plate and packing press the cover to pack, packing pad and throttle cover compress tightly, and the throttle cover has balanced valve body internal pressure and prevents the effect of outer hourglass to improve the leakproofness between valve rod and the valve gap, avoided the lift of valve rod and driven the medium in the gate valve and leak outward.
Description of the drawings:
fig. 1 is the utility model relates to a fixed high-pressure gate valve seal structure's structural schematic.
Fig. 2 is a schematic view showing the connection of the four-open ring, the self-sealing pad and the backing ring in fig. 1.
Reference numbers in the figures:
1-valve body, 2-valve cover, 3-valve rod, 4-throttling sleeve, 5-packing, 6-packing pressing sleeve, 7-packing pressing plate, 8-first stud, 9-first nut, 10-self-sealing gasket, 11-backing ring, 12-four open ring, 13-pressing plate, 14-second stud, 15-second nut, 16-bracket, 17-third stud, 18-sealing cavity, 19-step part and 20-packing pad.
The specific implementation mode is as follows:
in order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.
In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship, such as those based on the drawings, are only for convenience of description and simplification of description, and do not indicate or imply that the structures or units indicated must have a specific orientation, and therefore, should not be construed as limiting the present invention.
In the present invention, unless otherwise specified or limited, terms such as "connected," "provided," "having," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, or directly connected, and may be connected through an intermediate medium, and those skilled in the art can understand the basic meaning of the above terms in the present invention according to specific situations.
Fig. 1 shows an embodiment of a sealing structure of a fixed high-pressure gate valve of the present invention, which comprises a valve body 1, a valve cover 2 and a valve rod 3, wherein the lower end of the valve rod 3 longitudinally penetrates through the valve cover 2 and is disposed in the valve body 1, a throttling sleeve 4, a packing pad 20, a packing 5 and a packing pressing sleeve 6 are sequentially disposed between the valve cover 2 and the valve rod 3 from bottom to top, a packing pressing plate 7 is disposed above the packing pressing sleeve 6, the outer end of the packing pressing plate 7 is fastened by a plurality of first stud bolts 8 distributed in an equal circumference to compress the packing 5 by the packing pressing sleeve 6, the lower end of the first stud bolt 8 is in threaded connection with the valve cover 2, and the upper end of the first stud bolt 8 protrudes out of the packing pressing plate 6 and is connected with a first nut 9;
as shown in fig. 2, a self-sealing gasket 10 and a backing ring 11 are sequentially arranged between the outer side end of the valve cover 2 and the inner wall of the valve body 1 from bottom to top, a four-open ring 12 is embedded in the position, close to the backing ring 11, of the inner wall of the valve body 1, the four-open ring 12 is in contact with the backing ring 11, a pressing plate 13 is sleeved on the upper side of the valve cover 2, the lower end of the outer side of the pressing plate 13 is matched with the valve body 1 and longitudinally penetrates through the pressing plate 13 to the valve cover 2, a plurality of second stud bolts 14 are arranged in the valve cover 2, the lower end of each second stud bolt 14 protrudes out of the pressing plate 13 and is connected with a second nut 15, and the second nut 15 locks the second stud bolts 14 and is matched with the pressing plate 13 so as to prevent the valve cover 2 from being unstably connected due to fluctuating pressure inside the valve cavity.
The upside cover of valve gap 2 is equipped with clamp plate 13, the outside lower extreme of clamp plate 13 cooperates with valve body 1, and vertically run through clamp plate 13 to valve gap 2 and have a plurality of second stud 14, the lower extreme of second stud 14 is arranged in valve gap 2, the upper end protrusion in clamp plate 13 of second stud 14 is connected with second nut 15, second nut 15 locks second stud 14, make valve gap 2, self-sealing pad 10, backing ring 11, valve body 1, clamp plate 13 form integral connection structure, prevent because the fluctuation of the pressure of valve pocket, and make valve gap 2, self-sealing pad 10, the outer hourglass that the unstable connection of backing ring 11 caused.
The utility model discloses set up the seal structure form from sealed 10, backing ring 11 and four ring-opening 12 between valve gap 2 and valve body 1, four ring-opening 12's setting effectively prevents the pressure promotion valve gap 2 upward movement in the gate valve, guarantees the stability of being connected between valve gap 2 and the valve body 1, guarantees the leakproofness between valve gap 2 and the valve body 1 again under the effect from sealed 10 and backing ring 11 of filling up.
Seal through throttle cover 4, packing pad 20, the medium of packing 5 in to the gate valve between valve rod 3 and the valve gap 2, packing clamp plate 7 and packing press the cover 6 to packing 5, packing pad 20 and throttle cover 4 compress tightly, and throttle cover 4 has the effect of balanced 1 internal pressure of valve body and preventing the hourglass to improve the leakproofness between valve rod 3 and the valve gap 2, avoided the lift of valve rod 3 and drive the medium in the gate valve and leak outward.
Further, the valve rod 3 is connected with the actuator through a support 16 to realize the up-and-down movement in the valve body 1, and the support 16 is arranged above the pressure plate 13 and the valve body 1 and is fixedly connected with the valve body 1 through a plurality of third stud bolts 17.
Furthermore, a sealing cavity 18 which is embedded by the sealing gasket 10 and the backing ring 11 is arranged between the outer side end of the valve cover 2 and the inner wall of the valve body 1.
Further, one side of four ring-opening 12 inlays and establishes in valve body 1, and the lower extreme of four ring-opening 12 inlays and establishes in seal chamber 18, thereby the upper end of four ring-opening 12 has step 19 and realizes the block with 1 inner wall of valve body, and the structural design of four ring-opening 12 both guarantees to be connected stably with valve body 1 and valve gap 2, plays to compressing tightly spacing effect to self sealss pad 10 and backing ring 11 simultaneously, further guarantees sealed effect.
The present invention is not limited to the above-described embodiments, and the description of the embodiments and the description is only illustrative of the principles of the present invention, and various changes and modifications can be made without departing from the spirit and scope of the present invention, which fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a fixed high-pressure gate valve seal structure which characterized in that: the lower end of the valve rod longitudinally penetrates through the valve cover and is arranged in the valve body, a throttling sleeve, a packing pad, packing and a packing pressing sleeve are sequentially arranged between the valve cover and the valve rod from bottom to top, a packing pressing plate is arranged above the packing pressing sleeve, the outer side end of the packing pressing plate is fastened through a plurality of first stud bolts distributed in an equal circumference mode to tightly press the packing by the packing pressing sleeve, the lower end of each first stud bolt is in threaded connection with the valve cover, and the upper end of each first stud bolt protrudes out of the packing pressing plate and is connected with a first nut;
the utility model discloses a valve structure, including valve gap, valve body inner wall, valve gap, valve body, valve gap, valve body inner wall, the outside end of valve gap and valve body inner wall have from sealed pad, backing ring from lower supreme in proper order between by, the position that the valve body inner wall is close to the backing ring inlays and is equipped with the four-ring opening, four-ring opening and backing ring contact, the upside cover of valve gap is equipped with the clamp plate, the outside lower extreme and the valve body cooperation of clamp plate, and vertically run through the clamp plate and have a plurality of second stud to the valve gap, the lower extreme of second stud is arranged in the valve gap, the upper end protrusion of second stud is in the clamp plate and is connected with the second nut, thereby second nut locking second stud prevents the valve gap from receiving the unsteady connection that the inside undulant pressure of valve pocket and arouse with the clamp plate cooperation.
2. The stationary high-pressure gate valve sealing structure according to claim 1, wherein: the valve rod is connected with the actuator through a support to realize up-and-down movement in the valve body, and the support is arranged above the pressing plate and the valve body and is fixedly connected with the valve body through a plurality of third stud bolts.
3. The stationary high-pressure gate valve sealing structure according to claim 1 or 2, wherein: and a sealing cavity in which the self-sealing gasket and the backing ring are embedded is arranged between the outer side end of the valve cover and the inner wall of the valve body.
4. The stationary high-pressure gate valve sealing structure according to claim 3, wherein: one side of the four open rings is embedded in the valve body, the lower ends of the four open rings are embedded in the sealed cavity, and the upper ends of the four open rings are provided with step parts to realize clamping with the inner wall of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120956089.4U CN215059967U (en) | 2021-05-07 | 2021-05-07 | Fixed high-pressure gate valve seal structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120956089.4U CN215059967U (en) | 2021-05-07 | 2021-05-07 | Fixed high-pressure gate valve seal structure |
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| Publication Number | Publication Date |
|---|---|
| CN215059967U true CN215059967U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120956089.4U Active CN215059967U (en) | 2021-05-07 | 2021-05-07 | Fixed high-pressure gate valve seal structure |
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| CN (1) | CN215059967U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325194A (en) * | 2022-10-17 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Energy-saving valve easy and convenient to disassemble, assemble and maintain |
-
2021
- 2021-05-07 CN CN202120956089.4U patent/CN215059967U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115325194A (en) * | 2022-10-17 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Energy-saving valve easy and convenient to disassemble, assemble and maintain |
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