CN219827741U - High-air-tightness low-temperature stop valve - Google Patents
High-air-tightness low-temperature stop valve Download PDFInfo
- Publication number
- CN219827741U CN219827741U CN202320435935.7U CN202320435935U CN219827741U CN 219827741 U CN219827741 U CN 219827741U CN 202320435935 U CN202320435935 U CN 202320435935U CN 219827741 U CN219827741 U CN 219827741U
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- valve
- cavity
- stop
- plug
- elastic sealing
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- 238000007789 sealing Methods 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000009434 installation Methods 0.000 claims description 11
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 abstract description 11
- 230000013011 mating Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- Sliding Valves (AREA)
Abstract
The utility model discloses a low-temperature stop valve with high air tightness, which comprises a valve body, wherein a water inlet and a water outlet are respectively arranged at two ends of the valve body, a stop cavity is communicated between the water inlet and the water outlet, a valve block is arranged in the stop cavity in a sliding manner, a plug is arranged at the bottom of the valve block, and a valve rod assembly for driving the valve block to slide is arranged at the top of the valve block; the bottom of the stop cavity is provided with an arc-shaped opening matched with the plug, and the outer side of the plug is provided with a first elastic sealing piece; at least one group of second elastic sealing elements are respectively arranged on the side wall of the cut-off cavity and positioned on the upper side and the lower side of the water inlet; a third elastic sealing element is arranged on the bottom end surface of the valve block; the utility model can stably and excellently seal the stop valve, effectively avoid low-temperature fluid leakage in the stop valve, and greatly prolong the sealing service life of the stop valve.
Description
Technical Field
The utility model belongs to the technical field of airtight stop valves, and particularly relates to a high-airtight low-temperature stop valve.
Background
The stop valve is one of valves for controlling on-off of fluid, and the low-temperature fluid is usually circulated in the low-temperature stop valve, and the delivery pressure is higher. Once the tightness of the valve body is insufficient, such as after long-term use, the sealing element between the valve core and the valve body is aged and loosened, and leakage of low-temperature fluid can occur. The leaked low-temperature fluid can be frozen rapidly, and the leakage condition of the stop valve is further aggravated. The traditional stop valve is sealed through setting up a sealing washer between the mating surface of case and valve body, after long-time use, the sealing washer can take place not hard up ageing condition, and then can not guarantee the leakproofness of stop valve.
Therefore, the utility model discloses a low-temperature stop valve with high air tightness, aiming at the problem of insufficient tightness after the traditional stop valve is used for a long time.
Disclosure of Invention
The utility model aims to provide a low-temperature stop valve with high air tightness, which can stably and excellently seal the stop valve, effectively avoid low-temperature fluid leakage in the stop valve and greatly prolong the sealing service life of the stop valve.
The utility model is realized by the following technical scheme:
the low-temperature stop valve with high air tightness comprises a valve body, wherein a water inlet and a water outlet are respectively arranged at two ends of the valve body, a stop cavity is communicated between the water inlet and the water outlet, a valve block is slidably arranged in the stop cavity, a plug is arranged at the bottom of the valve block, and a valve rod assembly for driving the valve block to slide is arranged at the top of the valve block; the bottom of the cut-off cavity is provided with an arc-shaped opening matched with the plug, a first elastic sealing element is arranged on the outer side of the plug, and the valve block compresses the first sealing element on the arc surface of the arc-shaped opening by sliding downwards to a closed position; at least one group of second elastic sealing elements are respectively arranged on the side wall of the cut-off cavity and positioned on the upper side and the lower side of the water inlet, and the valve block compresses the second elastic sealing elements on the side wall of the cut-off cavity through sliding; the bottom end face of the valve block is provided with a third elastic sealing piece, and the valve block tightly presses the third sealing piece on the bottom end face of the stop cavity by sliding downwards to a closed position.
The valve block is closed when sliding downwards to the extreme position, the stop valve is in the stop state, the plug at the bottom of the valve block is plugged with the arc-shaped opening communicated with the water outlet at the moment, and the first sealing piece at the outer side of the plug is pressed at the moment to cling to the arc surface of the arc-shaped opening, so that primary sealing between the plug and the arc-shaped opening is realized. Meanwhile, a third elastic sealing piece on the bottom end face of the valve block is tightly attached to the bottom end face of the cut-off cavity, so that the cut-off cavity is sealed in a second level. When the valve block slides downwards to the limit position, the side face of the valve block also compresses the second elastic sealing piece positioned below the water inlet on the side wall of the cut-off cavity towards the side wall of the cut-off cavity, and then three-level sealing of the cut-off cavity is achieved.
In order to better realize the utility model, further, at least one group of side wall annular grooves are respectively arranged on the side wall of the stop cavity and positioned on the upper side and the lower side of the water inlet, the second elastic sealing piece comprises an annular elastic flap, one end of the annular elastic flap is fixedly connected with one end of the inner part of the side wall annular groove, and the other end of the annular elastic flap extends to the inner part of the stop cavity.
In order to better realize the utility model, further, the bottom of the valve block is provided with a cone table protruding downwards, the end surface of the bottom of the cone table is provided with a plug installation cavity, and a plug is clamped in the plug installation cavity.
In order to better realize the utility model, further, the plug is a spherical plug or a conical plug.
In order to better realize the utility model, further, a sealing element mounting ring groove is arranged on the bottom end surface of the frustum and surrounds the plug mounting cavity, and a third elastic sealing element is clamped in the sealing element mounting ring groove.
In order to better implement the present utility model, further, the third elastic sealing member is an elastic sealing ring.
In order to better realize the utility model, the valve rod assembly further comprises a pushing screw rod, a reset spring and a valve rod, wherein the pushing screw rod is rotatably arranged at the top of the stop cavity in a threaded manner, the bottom end of the pushing screw rod is coaxially rotatably clamped with the valve rod, the bottom end of the valve rod is connected with the top end of the valve block, and the reset spring is arranged between the outer side of the top of the valve rod and the top of the stop cavity.
In order to better realize the utility model, further, the top of the stop cavity is provided with a guide sleeve, the guide sleeve is provided with a threaded hole, and a pushing screw rod is rotatably arranged in the threaded hole.
In order to better realize the utility model, further, the top end of the valve block is provided with a connecting hole, the bottom end of the valve rod extends to the inside of the connecting hole and is provided with a flange, the internal thread of the connecting hole is provided with a compression sleeve, and the bottom end surface of the compression sleeve compresses and limits the flange in the connecting hole.
Compared with the prior art, the utility model has the following advantages:
according to the utility model, the bottom of the valve body is provided with the plug, the arc-shaped opening at the bottom of the stop cavity is plugged by the plug driven by the downward movement of the valve body, and the arc surface of the arc-shaped opening is tightly pressed by the first elastic sealing piece at the outer side of the plug, so that the first-stage sealing of the stop valve is realized; meanwhile, the second elastic sealing pieces are respectively arranged on the upper side and the lower side of the water inlet on the side wall of the stop cavity, so that the second elastic sealing pieces are pressed towards the side wall of the stop cavity in the vertical sliding process of the valve body, and the second-stage sealing of the stop valve is realized; through set up the third elastic sealing piece on the bottom terminal surface of valve body, compress tightly the third elastic sealing piece downwards on the bottom terminal surface of shutoff chamber through the valve body, and then realize carrying out tertiary seal to the stop valve, and then improved the leakproofness of stop valve greatly, prolonged the sealed life of stop valve simultaneously.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic illustration of the opening of the shut-off chamber;
FIG. 3 is a schematic illustration of the structure of a valve stem assembly;
fig. 4 is a partial enlarged view at a of fig. 2.
Wherein: 1-a valve body; 2-valve block; 3-plugs; 4-a valve stem assembly; 5-arc-shaped openings; 6-a shut-off chamber; 100-a first resilient seal; 200-a second elastomeric seal; 300-a third elastomeric seal; 201-side wall annular groove; 41-pushing the screw; 42-a return spring; 43-valve stem; 44-a guide sleeve; 45-compressing the sleeve.
Detailed Description
Example 1:
the low-temperature stop valve with high air tightness comprises a valve body 1, wherein a water inlet and a water outlet are respectively arranged at two ends of the valve body 1, a stop cavity 6 is communicated between the water inlet and the water outlet, a valve block 2 is slidably arranged in the stop cavity 6, a plug 3 is arranged at the bottom of the valve block 2, and a valve rod assembly 4 for driving the valve block 2 to slide is arranged at the top of the valve block 2; the bottom of the cut-off cavity 6 is provided with an arc-shaped opening 5 matched with the plug 3, a first elastic sealing element 100 is arranged on the outer side of the plug 3, and the valve block 2 compresses the first sealing element 100 on the arc surface of the arc-shaped opening 5 by sliding downwards to a closed position; at least one group of second elastic sealing elements 200 are respectively arranged on the side wall of the cut-off cavity 6 and positioned on the upper side and the lower side of the water inlet, and the valve block 2 compresses the second elastic sealing elements 200 on the side wall of the cut-off cavity 6 through sliding; a third elastic seal 300 is provided on the bottom end face of the valve block 2, and the valve block 2 presses the third seal 300 against the bottom end face of the shut-off chamber 6 by sliding down to the closed position.
One end of the valve body 1 is provided with a water inlet, the other end is provided with a water outlet, and the middle part inside the valve body 1 is provided with a stop cavity 6 which communicates the water inlet with the water outlet. Specifically, the side wall of the stop cavity 6 is communicated with the water inlet, and the bottom of the stop cavity 6 is communicated with the water outlet through the arc-shaped opening 5. The inside of stopping chamber 6 is provided with valve body 2 along vertical direction slip, and the lateral surface of valve body 2 and the medial surface sliding fit who stops chamber 6, the end cap 3 of valve body 2 bottom and the cambered surface cooperation of arc hole 5, the bottom terminal surface of valve body 2 and the bottom terminal surface cooperation of stopping chamber 6.
The valve body 2 is pushed by the valve rod assembly 4 to slide downwards to the limit position along the stop cavity 6 so as to seal the arc-shaped opening 5, and at the moment, the first elastic sealing piece 100 at the outer side of the plug 3 is tightly attached to the arc-shaped surface of the arc-shaped opening 5, so that primary sealing is realized. Meanwhile, in the process of sliding down the valve body 2, the side wall of the valve body 2 compresses the second elastic sealing piece 200 on the side wall of the stop cavity 6, so that secondary sealing is realized; the three-stage elastic sealing piece 300 on the bottom end surface of the valve body 2 is tightly attached to the bottom end surface of the stop cavity 6, so that three-stage sealing is realized. Through tertiary seal, and then effectively guaranteed the leakproofness of stop valve, avoid freezing after the low temperature fluid seepage.
When the stop valve needs to be opened, the valve body 2 is driven to move upwards to the limit position through the valve rod assembly 4, at the moment, the plug 3 is separated from the arc-shaped opening 5 and does not squeeze the first elastic sealing element 100 any more, the bottom end face of the valve body 2 is separated from the bottom end face of the stop cavity 6 and does not squeeze the third elastic sealing element any more, and the outer side face of the valve body 2 does not squeeze the second elastic sealing element 200 on the side wall of the stop cavity 6 any more, so that the stop valve is opened, and fluid normally circulates along the directions of the water inlet, the stop cavity and the water outlet.
Example 2:
the embodiment is further optimized based on the above embodiment 1, at least one set of side wall annular grooves 201 are respectively disposed on the side wall of the stop cavity 6 at the positions of the upper side and the lower side of the water inlet, the second elastic sealing member 200 includes an annular elastic flap, one end of the annular elastic flap is fixedly connected to one end of the inner portion of the side wall annular groove 201, and the other end of the annular elastic flap extends to the inner portion of the stop cavity 6.
As shown in fig. 1, 2 and 4, a group of side wall annular grooves 201 are arranged on the side wall of the shut-off cavity 6 at the upper part of the water inlet, and another group of side wall annular grooves 201 are arranged at the lower part of the water inlet. An annular elastic flap is provided in the upper side wall annular groove 201, which extends in an upwardly inclined direction to the interior of the shut-off chamber 6. An annular elastic flap is provided in the lower side wall annular groove 201, which extends in a downwardly inclined direction into the interior of the shut-off chamber 6.
When the valve body 2 is slid down to the extreme position to block the shut-off chamber 6, as shown in fig. 1, the side wall of the valve body 2 presses the annular elastic flap in the side wall annular groove 201 of the lower part, so that the annular elastic flap seals the mating surface between the valve body 2 and the shut-off chamber 6. As shown in fig. 2, when the valve body 2 slides up to the limit position to open the shut-off chamber 6, the side wall of the valve body 2 presses the annular elastic flap in the side wall annular groove 201 at the upper part, so that the annular elastic flap seals the mating surface between the valve body 2 and the shut-off chamber 6. The sealing performance between the valve body 2 and the cut-off cavity 6 can be guaranteed no matter when the cut-off cavity 6 is closed or opened, and fluid leakage is effectively avoided.
Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.
Example 3:
the embodiment is further optimized based on the embodiment 1 or 2, as shown in fig. 4, a frustum protruding downwards is arranged at the bottom of the valve block 2, a plug installation cavity is arranged on the bottom end face of the frustum, and a plug 3 is clamped in the plug installation cavity.
When the valve body 2 slides upwards to the limit position to open the stop cavity 6, the side wall of the frustum at the bottom of the valve body 2 just corresponds to the water inlet, and fluid entering the water inlet is guided through the tapered frustum side wall, so that the fluid can flow downwards along the frustum side wall to the arc-shaped opening 5. The plug 3 is clamped in the plug installation cavity at the bottom of the frustum through a connecting bolt or a pressing plate, so that the plug 3 can be detachably installed.
Further, the plug 3 is a spherical plug or a conical plug.
Further, a sealing element installation ring groove is formed around the plug installation cavity on the bottom end surface of the frustum, and a third elastic sealing element 300 is clamped in the sealing element installation ring groove.
Further, the third elastic sealing element is an elastic sealing ring.
Other portions of this embodiment are the same as those of embodiment 1 or 2 described above, and thus will not be described again.
Example 4:
the present embodiment is further optimized based on any one of the foregoing embodiments 1 to 3, as shown in fig. 3, the valve rod assembly 4 includes a pushing screw 41, a return spring 42, and a valve rod 43, where the pushing screw 41 is rotatably mounted on the top of the stop cavity 6 by threads, the bottom end of the pushing screw 41 is coaxially rotatably clamped with the valve rod 43, the bottom end of the valve rod 43 is connected with the top end of the valve block 2, and the return spring 42 is disposed between the outside of the top of the valve rod 43 and the top of the stop cavity 6.
The top of the stop cavity 6 is provided with a top cover, a threaded hole for installing the pushing screw 41 in a threaded mode is formed in the top cover, a plug is arranged at the bottom end of the pushing screw 41, and a groove matched with the plug is formed in the top end of the valve rod 43. By rotating the jack screw 41, the valve rod 43 is pushed down, and the return spring 42 is stretched. By reversely rotating the pushing screw 41, the pushing screw 41 moves upwards, and at the moment, the reset spring 42 contracts and resets, so that the valve rod 43 is driven to move upwards and reset.
Further, a guide sleeve 44 is arranged at the top of the stop cavity 6, a threaded hole is formed in the guide sleeve 44, and a pushing screw 41 is rotatably arranged in the threaded hole. By arranging the guide sleeve 44 in threaded fit with the pushing screw 41, the axial movement of the pushing screw 41 can be more stable, and the axial movement of the pushing screw 41 can be guided.
Further, the top of valve piece 2 is provided with the connecting hole, the bottom of valve rod 43 extends to the inside of connecting hole and is provided with the flange, the inside screw thread of connecting hole installs compresses tightly sleeve 45, the bottom terminal surface of compressing tightly sleeve 45 compresses tightly the flange spacing inside the connecting hole. External threads are arranged on the outer wall of the compression sleeve 45, and internal threads are arranged on the inner wall of the connecting hole so as to realize threaded installation of the compression sleeve 45. After the compression sleeve 45 is screwed into the connecting hole, the bottom end face of the compression sleeve 45 is tightly pressed downwards against the top end face of the flange at the bottom end of the valve rod 43, so that the bottom end of the valve rod 43 is fixed in the connecting hole.
Other portions of this embodiment are the same as any of embodiments 1 to 3 described above, and thus will not be described again.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.
Claims (9)
1. The low-temperature stop valve with high air tightness comprises a valve body (1), wherein a water inlet and a water outlet are respectively arranged at two ends of the valve body (1), a stop cavity (6) is communicated between the water inlet and the water outlet, and the low-temperature stop valve is characterized in that a valve block (2) is slidably arranged in the stop cavity (6), a plug (3) is arranged at the bottom of the valve block (2), and a valve rod assembly (4) for driving the valve block (2) to slide is arranged at the top of the valve block (2); the bottom of the cut-off cavity (6) is provided with an arc-shaped opening (5) matched with the plug (3), a first elastic sealing piece (100) is arranged on the outer side of the plug (3), and the valve block (2) compresses the first elastic sealing piece (100) on the arc-shaped surface of the arc-shaped opening (5) by sliding downwards to a closed position; at least one group of second elastic sealing elements (200) are respectively arranged on the side wall of the cut-off cavity (6) and positioned on the upper side and the lower side of the water inlet, and the valve block (2) compresses the second elastic sealing elements (200) on the side wall of the cut-off cavity (6) through sliding; the bottom end face of the valve block (2) is provided with a third elastic sealing piece (300), and the valve block (2) presses the third elastic sealing piece (300) on the bottom end face of the stop cavity (6) through sliding downwards to a closed position.
2. The low-temperature stop valve with high air tightness according to claim 1, wherein the side wall of the stop cavity (6) is provided with at least one group of side wall annular grooves (201) respectively at the upper side and the lower side of the water inlet, the second elastic sealing element (200) comprises an annular elastic flap, one end of the annular elastic flap is fixedly connected with one end of the inner part of the side wall annular groove (201), and the other end of the annular elastic flap extends into the stop cavity (6).
3. The low-temperature stop valve with high air tightness according to claim 2, wherein a cone table protruding downwards is arranged at the bottom of the valve block (2), a plug installation cavity is arranged on the bottom end face of the cone table, and a plug (3) is clamped in the plug installation cavity.
4. A high tightness low temperature shut-off valve according to claim 3, characterized in that the plug (3) is a spherical plug or a conical plug.
5. A high tightness low temperature shut-off valve according to claim 3, wherein a seal mounting groove is provided around the plug mounting cavity on the bottom end surface of the frustum, and a third elastic seal (300) is clamped in the seal mounting groove.
6. The high tightness low temperature shut off valve according to claim 5, wherein said third elastic sealing member is an elastic sealing ring.
7. The high-air-tightness low-temperature stop valve according to any one of claims 1 to 6, wherein the valve rod assembly (4) comprises a pushing screw rod (41), a return spring (42) and a valve rod (43), the pushing screw rod (41) is rotatably arranged at the top of the stop cavity (6) in a threaded mode, the bottom end of the pushing screw rod (41) is coaxially rotatably clamped with the valve rod (43), the bottom end of the valve rod (43) is connected with the top end of the valve block (2), and the return spring (42) is arranged between the outer side of the top of the valve rod (43) and the top of the stop cavity (6).
8. The high-tightness low-temperature stop valve according to claim 7, wherein a guide sleeve (44) is arranged at the top of the stop cavity (6), a threaded hole is formed in the guide sleeve (44), and a pushing screw (41) is rotatably arranged in the threaded hole.
9. The high-tightness low-temperature stop valve according to claim 8, wherein the top end of the valve block (2) is provided with a connecting hole, the bottom end of the valve rod (43) extends to the inside of the connecting hole and is provided with a flange, a compression sleeve (45) is arranged in the internal thread of the connecting hole, and the bottom end surface of the compression sleeve (45) compresses and limits the flange in the inside of the connecting hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320435935.7U CN219827741U (en) | 2023-03-09 | 2023-03-09 | High-air-tightness low-temperature stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320435935.7U CN219827741U (en) | 2023-03-09 | 2023-03-09 | High-air-tightness low-temperature stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219827741U true CN219827741U (en) | 2023-10-13 |
Family
ID=88245528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320435935.7U Active CN219827741U (en) | 2023-03-09 | 2023-03-09 | High-air-tightness low-temperature stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219827741U (en) |
-
2023
- 2023-03-09 CN CN202320435935.7U patent/CN219827741U/en active Active
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