CN212251254U - Ultra-low temperature ball valve - Google Patents
Ultra-low temperature ball valve Download PDFInfo
- Publication number
- CN212251254U CN212251254U CN202020090929.9U CN202020090929U CN212251254U CN 212251254 U CN212251254 U CN 212251254U CN 202020090929 U CN202020090929 U CN 202020090929U CN 212251254 U CN212251254 U CN 212251254U
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- valve
- seat
- valve rod
- pressure relief
- ball
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Abstract
The utility model discloses an ultra-low temperature ball valve, including the valve body, locate spheroid and disk seat in the valve body, locate upper valve gap and valve rod on the valve body, the middle part of spheroid has seted up pressure release groove, pressure release groove in connect with the pressure release cassette that matches with pressure release groove shape, the one end that the pressure release cassette is close to the spheroid centre of sphere is the slot end, the one end of keeping away from the spheroid centre of sphere is the wide mouth end, the narrow mouth end be equipped with the runner, the wide mouth end be connected with foraminiferous fixing base, be equipped with fixed valve core and displacement valve core in the cavity that fixing base and pressure release cassette formed; the top of the outer loop bar is equipped with the seal cover coaxial with the valve rod, seal cover and valve rod between from last to coaxially being equipped with sealing plate, lip type sealing washer, one-level packing, sealing washer seat, second grade packing and valve rod spring down in proper order. The utility model discloses can the automatic release valve pocket pressure, damage reset spring when avoiding releasing pressure simultaneously, guarantee the sealing performance of valve rod in long-term operation and operation.
Description
Technical Field
The utility model particularly relates to an ultra-low temperature ball valve.
Background
At present, ultralow temperature ball valves are used on pipelines in the electric power industry, the hydraulic power industry, the petrochemical industry and the metallurgical industry and are used for cutting off liquid in the pipelines. After the ultralow temperature ball valve is closed, residual low temperature media in the valve body are rapidly gasified due to temperature rise along with time rise, the volume of the residual low temperature media rapidly expands, and the internal pressure of the valve rapidly rises, so that a pressure relief function is required; in addition, the sealing of the valve rod has defects, and the traditional packing sealing can cause the packing to be loose due to the abrasion of the packing in long-term use, so that the sealing performance is gradually reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects of the prior art, the utility model provides an ultra-low temperature ball valve, which comprises a valve body, a ball body and a valve seat arranged in the valve body, an upper valve cover and a valve rod arranged at the upper end of the valve body, wherein a pressure relief groove is arranged at the middle part of the ball body, a pressure relief clamping seat matched with the shape of the pressure relief groove is connected in the pressure relief groove, one end of the pressure relief clamping seat close to the ball center of the ball body is a narrow-mouth end, the other end far away from the ball center of the ball body is a wide-mouth end, a flow passage is arranged at the narrow-mouth end, the wide-mouth end is connected with a fixed seat with a hole, a fixed valve core and a displacement valve core are arranged in a cavity formed by the fixed seat and the pressure relief clamping seat, the fixed valve core is arranged at the upper part of the cavity, the two ends, the front section of the displacement valve core is conical and is abutted against the outlet of the flow passage, the middle part of the rear end of the displacement valve core is abutted against the surface of the fixed seat through a return spring, and the lower part of the rear end of the displacement valve core is provided with a stop block which is spaced from the fixed seat at a certain distance;
the upper valve cover on be connected with the outer loop bar coaxial with the valve rod, outer loop bar length be less than the valve rod, the middle part of outer loop bar is equipped with the drip lid, the top of outer loop bar is equipped with the seal cover coaxial with the valve rod, seal cover and valve rod between from last to being equipped with sealing clamp plate, lip type sealing washer, one-level filler, seal ring seat, second grade filler and valve rod spring to coaxial in proper order down, two inner circle grooves have been seted up to the inner wall of seal ring seat, an outer lane groove has been seted up to the outer wall of seal ring seat, inner circle groove and outer lane inslot be equipped with corresponding inner seal circle and outer seal circle respectively.
In order to better realize the normal operation of the ball valve in the ultralow temperature environment, the gap between the outer sleeve rod and the valve rod is preferably vacuumized or filled with dry air.
Preferably, the primary filler is made of PTCFE material.
Preferably, the secondary filler is a secondary filler ring made of flexible graphite.
Preferably, when the secondary packing is assembled at normal temperature, the valve rod spring is pre-compressed. When the packing is damaged due to friction and low temperature, the valve rod spring releases stress and compresses the packing to avoid sealing failure.
Preferably, the inner sealing ring and the outer sealing ring are both made of fluorosilicone rubber. The fluorosilicone rubber has excellent cold resistance and aging resistance, and can effectively ensure the sealing performance.
The working principle is as follows: when the ball body is under pressure of the pipeline, the automatic release structure on the ball body is kept closed under the action of self-spring pretightening force and medium acting force, and is in a sealing state. When the valve cavity is affected by the outside and pressure changes occur, the ball body is under the valve cavity acting force acting in the opposite direction, and when the abnormal pressure reaches a certain value, the acting force in the opposite direction overcomes the pretightening force of the reset spring in the discharge structure, so that the discharge structure is opened to form a discharge hole, the pressure in the valve cavity is discharged, and the valve can work safely and normally. Meanwhile, in the discharging process, if the pressure exceeding the elastic range of the reset spring is applied, the pressure limiting block in the fixed valve core can block the over-compression of the reset spring by the displacement valve core, so that the reset spring is prevented from losing efficacy after exceeding an allowable applied value.
Has the advantages that: in the utility model, the ball body is provided with the one-way conduction automatic pressure relief structure, so that the pressure of the valve cavity is released, and meanwhile, the spring is prevented from being damaged when the pressure is released, and the service life of the ball valve is prolonged; the utility model discloses well adoption is multi-level to pack sealed structure and is sealed the valve rod, has the self-compensating function, has avoided because the loss of packing and the sealed lax that leads to, has guaranteed the sealing performance of valve rod in long-term operation and operation.
Drawings
FIG. 1 is a schematic cross-sectional view of an ultra-low temperature ball valve;
FIG. 2 is a schematic cross-sectional view of a sphere;
FIG. 3 is an enlarged view of a portion A of FIG. 1;
in the figure: 1. the valve comprises a valve body, 2, a ball body, 3, a valve seat, 4, an upper valve cover, 5, a valve rod, 6, a pressure relief clamping seat, 7, a flow channel, 8, a fixed seat, 9, a fixed valve core, 10, a displacement valve core, 11, a return spring, 12, an outer sleeve rod, 13, a drip cover, 14, a sealing sleeve, 15, a sealing pressure plate, 16, a lip-shaped sealing ring, 17, primary packing, 18, a sealing ring seat, 19, a sealing ring seat, 20, a valve rod spring, 21, an inner sealing ring, 22 and an outer sealing ring.
Detailed Description
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.
As shown in fig. 1-3, an ultra-low temperature ball valve comprises a valve body 1, a ball body 2 and a valve seat 3 arranged in the valve body 1, an upper valve cover 4 and a valve rod 5 arranged at the upper end of the valve body 1, wherein a pressure relief groove is arranged at the middle part of the ball body 2, a pressure relief clamping seat 6 matched with the pressure relief groove in shape is connected in the pressure relief groove, one end of the pressure relief clamping seat 6 close to the ball center of the ball body is a narrow-mouth end, one end far away from the ball center of the ball body is a wide-mouth end, a flow passage 7 is arranged at the narrow-mouth end, a fixing seat 8 with a hole is connected at the wide-mouth end, a fixed valve core 9 and a displacement valve core 10 are arranged in a cavity formed by the fixing seat 8 and the pressure relief clamping seat 6, the fixed valve core 9 is arranged at the upper part of the cavity, two ends of the fixed valve core 9 are, the front section of the displacement valve core is conical and is abutted against the outlet of the flow passage, the middle part of the rear end of the displacement valve core 10 is abutted against the surface of the fixed seat 8 through a return spring 11, the lower part of the rear end of the displacement valve core 10 is provided with a stop block, and the stop block and the fixed seat are spaced at a certain distance;
the improved structure of the valve rod is characterized in that an outer sleeve rod 12 coaxial with the valve rod 5 is connected to the upper valve cover 4, the length of the outer sleeve rod 12 is smaller than that of the valve rod 5, a water dripping cover 13 is arranged in the middle of the outer sleeve rod 12, a sealing sleeve 14 coaxial with the valve rod is arranged at the top end of the outer sleeve rod 12, a sealing pressure plate 15, a lip-shaped sealing ring 16, a primary filler 17, a sealing ring seat 18, a secondary filler 19 and a valve rod spring 20 are sequentially and coaxially arranged between the sealing sleeve 14 and the valve rod 5 from top to bottom, two inner ring grooves are formed in the inner wall of the sealing ring seat 18, an outer ring groove is formed in the outer wall of the sealing ring seat 18, and corresponding inner sealing rings 21 and outer sealing rings. And a gap between the outer sleeve rod and the valve rod is vacuumized or filled with dry air. The primary filler is made of PTCFE material. The secondary filler is a secondary filler ring made of flexible graphite. When the secondary packing is assembled at normal temperature, the valve rod spring is pre-compressed. The inner sealing ring and the outer sealing ring are both made of fluorosilicone rubber.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. An ultralow temperature ball valve comprises a valve body, a ball body and a valve seat which are arranged in the valve body, an upper valve cover and a valve rod which are arranged at the upper end of the valve body, and is characterized in that a pressure relief groove is arranged at the middle part of the ball body, the pressure relief groove is internally connected with a pressure relief clamping seat matched with the pressure relief groove in shape, one end of the pressure relief clamping seat close to the ball center of the ball body is a narrow-mouth end, the other end of the pressure relief clamping seat far away from the ball center of the ball body is a wide-mouth end, a flow channel is arranged at the narrow-mouth end, a fixed seat with a hole is connected with the wide-mouth end, a fixed valve core and a displacement valve core are arranged in a cavity formed by the fixed seat and the pressure relief clamping seat, the fixed valve core is arranged at the upper part of the cavity, two ends of the fixed valve core are respectively abutted against, the middle part of the rear end of the displacement valve core is abutted to the surface of the fixed seat through a return spring, the lower part of the rear end of the displacement valve core is provided with a stop block, and the stop block and the fixed seat are spaced at a certain distance;
the upper valve cover on be connected with the outer loop bar coaxial with the valve rod, outer loop bar length be less than the valve rod, the middle part of outer loop bar is equipped with the drip lid, the top of outer loop bar is equipped with the seal cover coaxial with the valve rod, seal cover and valve rod between from last to being equipped with sealing clamp plate, lip type sealing washer, one-level filler, seal ring seat, second grade filler and valve rod spring to coaxial in proper order down, two inner circle grooves have been seted up to the inner wall of seal ring seat, an outer lane groove has been seted up to the outer wall of seal ring seat, inner circle groove and outer lane inslot be equipped with corresponding inner seal circle and outer seal circle respectively.
2. An ultra-low temperature ball valve in accordance with claim 1, wherein the gap between the outer sleeve and the valve stem is evacuated or filled with dry air.
3. An ultra-low temperature ball valve in accordance with claim 1, wherein said primary packing is PTCFE packing.
4. An ultra-low temperature ball valve in accordance with claim 1, wherein said secondary filler is flexible graphite.
5. The ultra-low temperature ball valve according to claim 1, characterized in that the inner sealing ring and the outer sealing ring are made of fluorosilicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090929.9U CN212251254U (en) | 2020-01-16 | 2020-01-16 | Ultra-low temperature ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020090929.9U CN212251254U (en) | 2020-01-16 | 2020-01-16 | Ultra-low temperature ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212251254U true CN212251254U (en) | 2020-12-29 |
Family
ID=73989844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020090929.9U Active CN212251254U (en) | 2020-01-16 | 2020-01-16 | Ultra-low temperature ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212251254U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503372A (en) * | 2021-06-25 | 2021-10-15 | 江苏亿阀股份有限公司 | Low-temperature ball valve with safety adjustable mechanism |
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
-
2020
- 2020-01-16 CN CN202020090929.9U patent/CN212251254U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503372A (en) * | 2021-06-25 | 2021-10-15 | 江苏亿阀股份有限公司 | Low-temperature ball valve with safety adjustable mechanism |
| CN114754162A (en) * | 2022-04-15 | 2022-07-15 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
| CN114754162B (en) * | 2022-04-15 | 2024-02-06 | 浙江贝尔控制阀门有限公司 | Low-temperature ball valve |
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