CN219954338U - Negative pressure prevention device - Google Patents
Negative pressure prevention device Download PDFInfo
- Publication number
- CN219954338U CN219954338U CN202321374070.4U CN202321374070U CN219954338U CN 219954338 U CN219954338 U CN 219954338U CN 202321374070 U CN202321374070 U CN 202321374070U CN 219954338 U CN219954338 U CN 219954338U
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- China
- Prior art keywords
- negative pressure
- piston
- ring piece
- prevention device
- hollow shell
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- 230000002265 prevention Effects 0.000 title claims abstract description 19
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 15
- 238000000746 purification Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
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- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The utility model provides a negative pressure prevention device which comprises a hollow shell, a piston, a hollow frame and a spring, wherein the periphery of the lower end of the hollow shell is provided with a connecting structure, the connecting structure is used for being connected with a connecting port formed in a pipeline, a channel and a first accommodating groove which are sequentially communicated from top to bottom are formed in the hollow shell, the lower end of the first accommodating groove is opened, the piston is positioned in the first accommodating groove and can slide up and down, a spacing structure is arranged between the inner peripheral wall of the piston and the peripheral wall of the accommodating groove, the hollow frame is arranged at the lower end of the hollow shell, the spring is positioned between the hollow frame and the piston, and the spring drives the piston to move upwards through elasticity so as to seal the upper port of the first accommodating groove. The utility model can balance negative pressure and prevent the negative pressure from causing adverse effect on a large-scale water distribution system.
Description
Technical Field
The utility model relates to the field of water treatment equipment, in particular to a negative pressure prevention device.
Background
When the large-scale water distribution system runs, if the pipeline is blocked or other system faults are encountered and the high-pressure pump is still running, the large-scale water distribution system can generate higher negative pressure, so that components of the large-scale water distribution system such as pipelines, tank bodies and the like are crushed and damaged by suction, and the high-pressure pump can cause cavitation and discard the components, so that economic loss is brought, a great amount of time is required for maintenance and replacement, and the technical problem of solving the adverse effect of the negative pressure on the large-scale water distribution system is solved by the technical personnel in the field.
Disclosure of Invention
The present utility model is directed to a negative pressure preventing device, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
negative pressure prevention device, including cavity casing, piston, fretwork frame and spring, the lower extreme periphery of cavity casing has connection structure, connection structure is used for being connected with the connector of seting up on the pipeline, the inside of cavity casing is equipped with passageway and the first holding tank of communicating in proper order from last down, the lower extreme opening of first holding tank, the piston is located the upper and lower slip of first holding tank, be equipped with interval structure between the inner peripheral wall of piston and the perisporium of holding tank, the lower extreme at cavity casing is installed to the fretwork frame, the spring is located between fretwork frame and the piston, the spring is through elasticity drive piston upward movement in order to carry out the shutoff to the upper port of first holding tank.
Further, the upper end of the hollow shell is provided with a nut-shaped protrusion, and the interior of the nut-shaped protrusion is communicated with the channel.
Further, an annular extension is arranged on the peripheral wall of the hollow shell.
Further, still include first sealing washer, connection structure includes from last first annular flange, first annular groove, first external screw thread structure and the second external screw thread structure that sets gradually down, first sealing ring snare is established in the periphery of first annular groove and is laminated with first annular flange, the diameter of first external screw thread structure is greater than the diameter of second external screw thread structure.
Further, the interval structure comprises a plurality of raised strips, the raised strips are distributed in a circumferential array, the lower ends of the raised strips are flush and are higher than the bottom surface of the hollow shell, and the piston can be slidably connected in a space surrounded by the raised strips.
Further, the piston comprises a cylinder body and a plug, the upper end of the cylinder body is sealed, the plug is arranged at the upper end of the cylinder body, a second accommodating groove is formed in the cylinder body, the lower end of the second accommodating groove is opened, and the spring is located in the second accommodating groove.
Further, a second annular groove is formed in the outer peripheral wall of the cylinder body.
Further, the plug further comprises a second sealing ring, a third annular groove is formed in the peripheral wall of the plug, and the second sealing ring is sleeved on the periphery of the third annular groove and is attached to the upper end of the first accommodating groove.
Further, the hollowed-out frame comprises an upper ring piece, a lower ring piece and connecting ribs, wherein the upper ring piece and the lower ring piece are sleeved in the lower end of the hollow shell, the outer diameter of the upper ring piece is smaller than or equal to the inner diameter of the lower ring piece, the upper ring piece and the lower ring piece are provided with intervals along the upper and lower directions, and the connecting ribs are fixedly connected between the upper ring piece and the lower ring piece.
Further, still include supplementary purification subassembly, supplementary purification subassembly installs the lower extreme at hollow shell, supplementary purification subassembly includes filter core, fretwork cover and adapter sleeve, the filter core is located the fretwork cover, a plurality of fretwork holes have been seted up on the fretwork cover, the fretwork cover passes through the adapter sleeve and installs the lower extreme at hollow shell.
The utility model has the beneficial effects that:
the large-scale water distribution system comprises a pipeline, wherein a connecting port is formed in the pipe wall of the pipeline, the hollow shell is manually arranged on the connecting port when the large-scale water distribution system is used, the hollow shell is connected with the connecting port through a connecting structure, the inside of the pipeline is communicated with the first accommodating groove, and under the condition that the internal pressure of the large-scale water distribution system is normal, the water pressure in the pipeline and the elastic force of the spring drive the piston to move upwards so as to block the upper port of the first accommodating groove, and the liquid in the pipeline is prevented from overflowing outwards through the large-scale water distribution system.
When the large-scale water distribution system generates large negative pressure, the negative pressure is generated in the pipeline, the piston is driven to move downwards by the negative pressure against the elasticity of the spring, at the moment, the channel in the hollow shell is opened, and external air sequentially passes through the channel, the interval between the piston and the first accommodating groove and the hollow frame to enter the pipeline so as to balance the negative pressure, and adverse effects of the negative pressure on the large-scale water distribution system are prevented.
Drawings
Fig. 1: the whole structure of the negative pressure preventing device is schematically shown.
Fig. 2: a schematic perspective view of the negative pressure prevention device.
Fig. 3: an exploded schematic view of the negative pressure prevention device.
Fig. 4: the overall structure of the hollow shell of the negative pressure prevention device is schematically shown.
Fig. 5: the overall structure of the piston of the negative pressure prevention device is schematically shown.
Fig. 6: a perspective schematic diagram of a hollowed-out frame of the negative pressure prevention device.
Fig. 7: a perspective schematic diagram of a hollowed-out cover of the negative pressure prevention device.
Fig. 8: a schematic perspective view of a connecting sleeve of the negative pressure preventing device.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
referring to fig. 1 to 5, the negative pressure preventing device comprises a hollow shell 1, a piston 2, a hollow frame 3 and a spring 4, wherein the periphery of the lower end of the hollow shell 1 is provided with a connecting structure 11, the connecting structure 11 is used for being connected with a connecting port formed in a pipeline, a channel 12 and a first accommodating groove 13 which are sequentially communicated from top to bottom are arranged in the hollow shell 1, the lower end of the first accommodating groove 13 is opened, the piston 2 is positioned in the first accommodating groove 13 and can slide up and down, a spacing structure is arranged between the inner peripheral wall of the piston 2 and the peripheral wall of the accommodating groove, the hollow frame 3 is arranged at the lower end of the hollow shell 1, the spring 4 is positioned between the hollow frame 3 and the piston 2, and the spring 4 drives the piston 2 to move upwards through elasticity so as to seal the upper port of the first accommodating groove 13.
Referring to fig. 1, the hollow housing 1 is provided at an upper end thereof with a nut-shaped protrusion 14, and an inside of the nut-shaped protrusion 14 communicates with the passage 12.
Referring to fig. 1, a female connector 15 is provided on the nut-shaped protrusion 14, and the interior of the female connector 15 communicates with the passage 12.
The novel hose further comprises a hose and a male connector, one end of the hose is fixedly connected with one end of the male connector, the other end of the male connector is sleeved on the periphery of the female connector 15 and is in threaded connection with the female connector, and the other end of the hose faces downwards. By providing the female connector 15, the hose and the male connector, on the one hand, suction of air is ensured and, on the other hand, dust in the air is prevented from falling down and depositing in the channel 12.
Referring to fig. 1, a plurality of annular extending edges 16 are provided on the outer peripheral wall of the hollow housing 1, and the plurality of annular extending edges 16 are arranged at intervals along the up-down direction. After the utility model is manually screwed off the pipeline, the annular extension 16 can be conveniently lifted by a human hand.
Referring to fig. 3 and 4, the connecting structure 11 further includes a first sealing ring 1-1, and the connecting structure 11 includes a first annular flange 111, a first annular groove 112, a first external thread structure 113 and a second external thread structure 114 sequentially disposed from top to bottom, wherein the first sealing ring 1-1 is sleeved on the periphery of the first annular groove 112 and is attached to the first annular flange 111, and a diameter A1 of the first external thread structure 113 is larger than a diameter A2 of the second external thread structure 114.
Referring to fig. 1 and 4, the spacing structure includes a plurality of protruding strips 17, the plurality of protruding strips 17 are distributed in a circumferential array, the lower ends of the plurality of protruding strips 17 are flush and higher than the bottom surface of the hollow housing 1, and the piston 2 is slidably connected in a space surrounded by the plurality of protruding strips 17. The spacer structure serves to form a space between the first receiving groove 13 and the piston 2 through which air flows.
Referring to fig. 1 and 5, the piston 2 includes a cylinder 21 and a plug 22, the plug 22 is disposed at an upper end of the cylinder 21, the upper end of the cylinder 21 is sealed, a second accommodating groove 211 is disposed in the cylinder 21, a lower end of the second accommodating groove 211 is opened, and the spring 4 is disposed in the second accommodating groove 211.
Referring to fig. 5, a second annular groove 212 is formed on the outer peripheral wall of the cylinder 21, for reducing the contact area between the outer peripheral wall of the cylinder 21 and the plurality of protruding strips 17, so as to reduce the sliding friction and improve the smoothness of sliding of the cylinder 21.
Referring to fig. 3 and 5, the plug further includes a second sealing ring 23, a third annular groove 221 is formed in the outer peripheral wall of the plug 22, and the second sealing ring 23 is sleeved on the periphery of the annular groove and is attached to the upper end of the first accommodating groove 13.
Referring to fig. 6, the hollow frame 3 includes an upper ring piece 31, a lower ring piece 32 and a connecting rib 33, wherein the upper ring piece 31 and the lower ring piece 32 are all sleeved in the lower end of the hollow shell 1, the outer diameter of the upper ring piece 31 is smaller than or equal to the inner diameter of the lower ring piece 32, a space is provided between the upper ring piece 31 and the lower ring piece 32 along the up-down direction, the lower ring piece 32 is attached under the lower ends of the plurality of raised strips 17, and the connecting rib 33 is fixedly connected between the upper ring piece 31 and the lower ring piece 32. The plurality of connection ribs 33 are arranged and distributed in a circumferential array.
Referring to fig. 1 and 6, the device further includes a plurality of limiting protrusions 34, wherein the plurality of limiting protrusions 34 are fixedly disposed on the upper surface of the upper ring 31 and distributed in a circumferential array, a limiting space is formed between the plurality of limiting protrusions 34, and the lower end of the spring 4 is attached to the upper ring 31 and located in the limiting space, so as to limit the displacement of the lower end of the spring 4 along the horizontal plane direction.
Referring to fig. 1, the air purifier further comprises an auxiliary purifying component 5, and the auxiliary purifying component 5 is installed at the lower end of the hollow shell 1.
Referring to fig. 1 and 2, the auxiliary purifying component 5 includes a filter element, a hollow cover 51 and a connecting sleeve 52, the filter element is located in the hollow cover 51, a plurality of hollow holes 511 are formed in the hollow cover 51, and the hollow cover 51 is installed at the lower end of the hollow housing 1 through the connecting sleeve 52.
Referring to fig. 1, 4, 7 and 8, the outer diameter of the connecting sleeve 52 is smaller than the outer diameter A1 of the first external thread structure 113, an anti-slip structure 521 is disposed on the outer peripheral wall of the connecting sleeve 52, an internal thread structure 522 is disposed on the upper portion of the inner peripheral wall of the connecting sleeve 52, the connecting sleeve 52 is sleeved outside the second external thread structure 114 and is in threaded connection with the second external thread structure 114 through the internal thread structure 522, an annular step 523 is disposed on the lower portion of the inner peripheral wall of the connecting sleeve 52, the lower end of the hollow cover 51 is sealed, the upper end of the hollow cover 51 is opened, a second annular flange 512 is disposed on the upper periphery of the hollow cover 51, the hollow cover 51 is sleeved in the connecting sleeve 52, the outer diameter of the second annular flange 512 is larger than the inner diameter of the annular step 523, the second annular flange 512 is attached to the annular step 523, and the upper surface of the hollow cover 51 is attached to the bottom surface of the hollow housing 1.
The filter element is hollow cylindrical active carbon filter cotton.
The large-scale water distribution system comprises a pipeline, a connecting port is formed in the pipe wall of the pipeline, a threaded through hole is formed in the inner peripheral wall of the pipeline, the novel pipeline is installed on the pipeline, the novel pipeline is manually driven to insert the novel pipeline into the connecting port in the direction of the auxiliary purification assembly 5 towards the connecting port, then the annular extension 16 is manually driven to drive the hollow shell 1 to rotate in a linkage mode through the first external thread structure 113, the novel pipeline is in threaded connection with the connecting port, the hollow shell 1 is manually screwed, the nut-shaped bulge 14 is driven to drive the hollow shell 1 to rotate through a spanner, the hollow shell 1 is completely screwed, at the moment, the first sealing ring 1-1 is tightly pressed between the first annular flange 111 and the connecting port, the hollow shell 1 is in sealing connection with the connecting port, at the moment, the auxiliary purification assembly 5 stretches into the pipeline, part of liquid in the pipeline passes through the hollow cover 51 and the filter element, and the auxiliary filtering and purifying can be carried out on the part of liquid through the hollow shell.
Under the condition that the internal pressure of the large-scale water distribution system is normal, the water pressure in the pipeline and the elastic force of the spring 4 drive the piston 2 to move upwards, so that the piston is tightly pressed against the upper end surface of the first accommodating groove 13 through the second sealing ring 23, the upper port of the first accommodating groove 13 is plugged, and the liquid in the pipeline is prevented from overflowing outwards through the utility model.
When the large-scale water distribution system generates large negative pressure, the negative pressure is generated in the pipeline, the piston 2 is driven to move downwards by the negative pressure against the elasticity of the spring 4, at the moment, the channel 12 of the hollow shell 1 is opened, and external air sequentially passes through the channel 12, the interval between the piston 2 and the first accommodating groove 13, the hollow frame 3, the filter element and the hollow cover 51 to enter the pipeline so as to balance the negative pressure, and adverse effect of the negative pressure on the large-scale water distribution system is prevented.
The above description should not be taken as limiting the scope of the utility model, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present utility model still fall within the scope of the technical solutions of the present utility model.
Claims (10)
1. Negative pressure prevention device, its characterized in that: including cavity casing, piston, fretwork frame and spring, the lower extreme periphery of cavity casing has connection structure, connection structure is used for being connected with the connector of seting up on the pipeline, the inside of cavity casing is equipped with passageway and the first holding tank of communicating in proper order from last down, the lower extreme opening of first holding tank, the piston is located the upper and lower slip of first holding tank, be equipped with interval structure between the inner peripheral wall of piston and the perisporium of holding tank, the lower extreme at cavity casing is installed to the fretwork frame, the spring is located between fretwork frame and the piston, the spring passes through elasticity drive piston upward movement in order to carry out the shutoff to the upper port of first holding tank.
2. The negative pressure prevention device according to claim 1, wherein: the upper end of the hollow shell is provided with a nut-shaped bulge, and the interior of the nut-shaped bulge is communicated with the channel.
3. The negative pressure prevention device according to claim 1, wherein: an annular extension edge is arranged on the peripheral wall of the hollow shell.
4. The negative pressure prevention device according to claim 1, wherein: still include first sealing washer, connection structure includes from last first annular flange, first annular groove, first external screw thread structure and the second external screw thread structure that down set gradually, first sealing ring snare is established at first annular groove's periphery and is laminated with first annular flange, first external screw thread structure's diameter is greater than the diameter of second external screw thread structure.
5. The negative pressure prevention device according to claim 1, wherein: the interval structure comprises a plurality of raised strips, the raised strips are distributed in a circumferential array, the lower ends of the raised strips are flush and are higher than the bottom surface of the hollow shell, and the piston can be slidably connected in a space surrounded by the raised strips.
6. The negative pressure prevention device according to claim 1, wherein: the piston comprises a cylinder body and a plug, the plug is arranged at the upper end of the cylinder body, the upper end of the cylinder body is sealed, a second accommodating groove is formed in the cylinder body, the lower end of the second accommodating groove is open, and the spring is located in the second accommodating groove.
7. The negative pressure preventing device according to claim 6, wherein: the outer peripheral wall of the cylinder body is provided with a second annular groove.
8. The negative pressure preventing device according to claim 6, wherein: the plug is characterized by further comprising a second sealing ring, wherein a third annular groove is formed in the peripheral wall of the plug, and the second sealing ring is sleeved on the periphery of the third annular groove and is attached to the upper end of the first accommodating groove.
9. The negative pressure prevention device according to claim 1, wherein: the hollow frame comprises an upper ring piece, a lower ring piece and connecting ribs, wherein the upper ring piece and the lower ring piece are sleeved in the lower end of the hollow shell, the outer diameter of the upper ring piece is smaller than or equal to the inner diameter of the lower ring piece, the upper ring piece and the lower ring piece are provided with intervals along the upper and lower directions, and the connecting ribs are fixedly connected between the upper ring piece and the lower ring piece.
10. The negative pressure prevention device according to claim 1, wherein: still include supplementary purification subassembly, supplementary purification subassembly installs the lower extreme at hollow shell, supplementary purification subassembly includes filter core, fretwork cover and adapter sleeve, the filter core is located the fretwork cover, a plurality of fretwork holes have been seted up on the fretwork cover, the fretwork cover passes through the adapter sleeve and installs the lower extreme at hollow shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321374070.4U CN219954338U (en) | 2023-06-01 | 2023-06-01 | Negative pressure prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321374070.4U CN219954338U (en) | 2023-06-01 | 2023-06-01 | Negative pressure prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219954338U true CN219954338U (en) | 2023-11-03 |
Family
ID=88547878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321374070.4U Active CN219954338U (en) | 2023-06-01 | 2023-06-01 | Negative pressure prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219954338U (en) |
-
2023
- 2023-06-01 CN CN202321374070.4U patent/CN219954338U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |