CN108487376B - Pipeline frost crack protection device - Google Patents
Pipeline frost crack protection device Download PDFInfo
- Publication number
- CN108487376B CN108487376B CN201810631686.2A CN201810631686A CN108487376B CN 108487376 B CN108487376 B CN 108487376B CN 201810631686 A CN201810631686 A CN 201810631686A CN 108487376 B CN108487376 B CN 108487376B
- Authority
- CN
- China
- Prior art keywords
- pipe
- valve
- control
- water supply
- control valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 230000002265 prevention Effects 0.000 claims abstract description 8
- 239000006260 foam Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 208000001034 Frostbite Diseases 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 13
- 239000002699 waste material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000006163 transport media Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/09—Component parts or accessories
- E03B7/10—Devices preventing bursting of pipes by freezing
- E03B7/12—Devices preventing bursting of pipes by freezing by preventing freezing
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Magnetically Actuated Valves (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The invention discloses a pipeline frost crack prevention protection device which is arranged at the top of an outdoor water supply vertical pipe and comprises a drainage branch pipe, wherein the drainage branch pipe is communicated with the outdoor water supply vertical pipe, a butterfly valve for controlling the on-off of the drainage branch pipe is arranged on the drainage branch pipe, a valve control assembly is arranged above the butterfly valve and is arranged on the outdoor water supply vertical pipe, the valve control assembly is matched with the butterfly valve, and the pipeline frost crack prevention protection device further comprises a detection assembly which is arranged on the outdoor water supply vertical pipe and is electrically connected with the valve control assembly.
Description
Technical Field
The invention relates to the technical field of pipeline protection devices, in particular to an anti-frost crack protection device for a pipeline.
Background
In people's daily life, water is indispensable component part, if water supply interruption can cause very big influence to people's daily life, as the transport medium of water, the protection work of pipeline is very important, especially the outside pipeline freezes very easily when the weather is cold, and the method of solving the pipeline freeze now is that wrap up cotton and foam outside the pipeline and make the water pipe keep warm, the inoxidizing coating of artifical parcel exposes and need often change outdoors, this maintenance mode is comparatively loaded down with trivial details, the implementation of antifreeze layer is comparatively expensive simultaneously, increased the winter maintenance cost of water pipe, and it is very difficult to overhaul when the water pipe appears leaking.
Disclosure of Invention
According to the defects of the prior art, the technical problem to be solved by the invention is to provide the pipeline frost crack prevention protection device.
The invention solves the technical problems by adopting the following technical scheme:
the utility model provides a pipeline prevents frostbite and splits protection device, its installs at the top of outdoor water supply riser, including the branch drain pipe, the branch drain pipe is linked together with outdoor water supply riser, installs the butterfly valve of control branch drain pipe break-make on the branch drain pipe, and the accuse valve subassembly is installed on outdoor water supply riser to the top of butterfly valve, and accuse valve subassembly cooperatees with the butterfly valve, still includes the detection subassembly, and the detection subassembly is installed on outdoor water supply riser to with accuse valve subassembly electric connection.
The control valve assembly comprises a control valve block, the control valve block is arranged on an outdoor water supply vertical pipe, a left-right through cavity is arranged in the control valve block, a slide valve is connected in the cavity in a sliding mode, one end of the control valve block is provided with an adjusting nut in a threaded mode, an adjusting spring is arranged between the adjusting nut and the slide valve, one end of the control valve block, which is far away from the adjusting nut, is provided with a hydraulic cavity in a threaded mode, one end of the slide valve, which is far away from the adjusting spring, is provided with a control water pipe in a sliding mode, the control water pipe is communicated with the outdoor water supply vertical pipe, the lower end of the control valve block is provided with a slide way which penetrates through the cavity, the lower end of the slide valve slides along the slide way in a threaded mode, one end of the control rod, which is far away from the slide valve, is provided with a waist hole, an electromagnetic coil is wound on the control rod along the waist hole, the waist hole is located above the butterfly valve, and the control rod is connected with the butterfly valve after being electrified.
The upper end of the butterfly valve is provided with a handle, the end part of the handle is provided with a sliding pin along the vertical direction in a sliding connection mode, and the sliding pin slides into the waist hole under the attraction of the electromagnetic coil after being electrified.
The outside of the control water pipe is wrapped with heat preservation foam.
The control water pipe is provided with a shutoff electromagnetic valve.
One end of the slide valve, which is far away from the adjusting spring, is provided with a boss, and the outer edge of the boss is provided with a sealing ring.
The detection assembly comprises a temperature sensor and a pressure sensor, wherein the temperature sensor and the pressure sensor are both installed on the outdoor water supply vertical pipe, and the temperature sensor and the pressure sensor are both electrically connected with the valve control assembly.
The beneficial effects of the invention are as follows:
according to the invention, the water in the outdoor water supply vertical pipe is partially or completely discharged through the arrangement of the water discharge branch pipe, so that the frost damage of the pipeline is prevented, the electromagnetic coil is arranged, the valve component is connected with the butterfly valve only when the water is required to be discharged, the phenomenon that the butterfly valve is opened due to sudden change of the water pressure in the outdoor water supply vertical pipe to cause water waste is avoided, the water discharge speed of the water discharge branch pipe can be automatically regulated according to the water pressure, and the smoothness of the pipeline is ensured.
Drawings
The contents expressed in the drawings of the present specification and the marks in the drawings are briefly described as follows:
FIG. 1 is a schematic structural view of a pipeline frost crack protection device according to the present invention;
FIG. 2 is a top view of the pipeline frost crack protection apparatus of the present invention;
fig. 3 is an internal structural view of the control valve block of the present invention.
Detailed Description
The following description of the embodiments of the present invention, such as the shape and construction of the components, the mutual positions and connection relationships between the components, the roles and working principles of the components, the manufacturing process and the operating and using method, etc., will further explain the present invention in detail, so as to help those skilled in the art to more fully understand the present invention.
The utility model provides a pipeline prevents frostbite and splits protection device, its installs in the bottom of outdoor water supply riser 1, including drainage branch pipe 2, drainage branch pipe 2 is linked together with outdoor water supply riser 1, installs the butterfly valve 3 of control drainage branch pipe 2 break-make on the drainage branch pipe 2, and accuse valve assembly 4 is installed to butterfly valve 3's top, and accuse valve assembly 4 is installed on outdoor water supply riser 1, and accuse valve assembly 4 cooperatees with butterfly valve 3, still includes the detection subassembly, and the detection subassembly is installed on outdoor water supply riser 1 to with accuse valve assembly 4 electric connection. Wherein, the drainage branch pipe 2 can be linked together with the rain drainage pipeline in district, when the temperature was too low, the detection component was connected with butterfly valve 3 through the change control valve subassembly 4 that detects temperature and water pressure, and the control valve subassembly 4 control butterfly valve 3 is opened, with the water partial or the whole discharge in the outdoor water supply riser 1, and then prevent the pipeline frost crack damage.
The control valve assembly 4 comprises a control valve block 41, the control valve block 41 is arranged on the outdoor water supply vertical pipe 1, a left-right through cavity 42 is arranged in the control valve block 41, a slide valve 43 is connected in the cavity 42 in a sliding mode, an adjusting nut 44 is arranged at one end of the control valve block 41 in a threaded mode, an adjusting spring 45 is arranged between the adjusting nut 44 and the slide valve 43, a hydraulic cavity 46 is arranged at one end of the control valve block 41, which is far away from the adjusting nut 44, in a male threaded mode, a hydraulic cavity 46 is arranged at one end of the slide valve 43, which is far away from the adjusting spring 45, in a sliding mode, a control water pipe 47 is connected with the outdoor water supply vertical pipe 1, a slide rail 48 which is connected to the cavity 42 in a sliding mode is arranged at the lower end of the control valve block 41, a control rod 49 is arranged in a vertical direction in a sliding mode, the slide rail 48 penetrates through the cavity 42 and slides along the slide rail 48, a waist hole 410 is arranged at one end of the control rod 49, which is far away from the slide valve 43, an electromagnetic waist coil 411 is wound on the control rod 49, a waist coil is arranged at one end, which is far away from the slide valve 45, in a waist hole 410, is connected with the butterfly valve 3, and the butterfly valve is connected with the butterfly valve 3.
The upper end of butterfly valve 3 is equipped with handle 31, and the tip of handle 31 is equipped with slide pin 32 along vertical direction through sliding connection's mode, and slide pin 32 slides into waist hole 410 under solenoid 411's attraction after the circular telegram. Wherein, the electromagnetic coil 411 is connected with an external power supply, when the electromagnetic coil 411 charges, the electromagnetic coil 411 sucks the sliding pin 32 into the waist hole 410 through magnetic force, the control water pipe 47 is communicated with the outdoor water supply vertical pipe 1, water in the outdoor water supply vertical pipe 1 enters the hydraulic cavity 46 through the control water pipe 47, the water pressure overcomes the acting force of the regulating spring 45 to push the sliding valve 43 to move relative to the regulating spring 45, the sliding valve 43 drives the control rod 49 to move, the control rod 49 drives the handle 31 to rotate through the sliding pin 32, the sliding pin 32 slides in the waist hole 410, the handle 31 drives the butterfly valve 3 to open, the water in the outdoor water supply vertical pipe 1 is discharged through the water discharge branch pipe 2, the water pressure is larger in the initial stage, the opening degree of the butterfly valve 3 is larger, the water flow speed is faster, the fast flowing water can dredge slight blockage in the outdoor water supply vertical pipe 1, and the water in the outdoor water supply vertical pipe 1 is completely discharged, the water pressure in the control water pipe 47 is reduced, the slide valve 43 drives the slide valve 43 to move in the opposite direction under the action of the regulating spring 45, the slide valve 43 drives the control rod 49 to move in the opposite direction, the control rod 49 drives the butterfly valve 3 to be gradually closed through the connection with the handle 31, when the butterfly valve 3 is completely closed, the electromagnetic coil 411 is powered off, the sliding pin 32 is separated from the waist hole 410, the acting force of the regulating spring 45 can be regulated through regulating the position of the regulating nut 44, when the pipeline is blocked, the pipeline pressure is increased, when the water pressure in the pipeline is insufficient to jack the regulating spring 45, the butterfly valve 3 is in a closed state, the butterfly valve 3 is prevented from being opened to cause water misdischarge of the outdoor water supply vertical pipe 1 to cause waste, the control valve component 4 and the butterfly valve 3 are in an open state, and the butterfly valve 3 is only connected with the butterfly valve 3 when the water is required to be discharged, the butterfly valve 3 is prevented from being opened due to sudden change of the water pressure in the outdoor water supply vertical pipe 1, resulting in waste of water.
The outside of the control water pipe 47 is wrapped with insulating foam. Wherein, control water pipe 47 diameter is less, and the jam that unfreezes easily when the temperature is lower, and the setting of heat preservation foam has guaranteed that control water pipe 47 internal water does not unfreeze, guarantees the normal operating of accuse valve assembly 4.
The control water pipe 47 is provided with a shutoff solenoid valve 412. In the non-working state, the waist hole 410 on the control rod 49 is opposite to the lower part of the sliding pin 32, and the shutoff solenoid valve 412 is used for cutting off the connection between the hydraulic cavity 46 and the outdoor water supply vertical pipe 1, so that the control rod 49 is ensured to be in an initial position, and conditions are created for normal drainage work.
The end of the slide valve 43, which is far away from the adjusting spring 45, is provided with a boss 431, and the outer edge of the boss 431 is provided with a sealing ring 432. The sealing ring 432 ensures tightness in the hydraulic cavity 46 and prevents water from flowing out to damage the control valve assembly 4.
The detection assembly comprises a temperature sensor and a pressure sensor, the temperature sensor and the pressure sensor are both installed on the outdoor water supply vertical pipe 1, and the temperature sensor and the pressure sensor are both electrically connected with the control valve assembly 4. The temperature sensor detects the water temperature in the pipeline, after the winter temperature is lower than 0 ℃, low-temperature early warning is started, whether the pressure change is detected by the pressure sensor to sense whether the water in the pipeline flows or not, if not, the electromagnetic coil 411 is electrified, the valve control assembly 4 opens the butterfly valve 3, and the water in the pipeline is discharged; when the temperature is lower than minus 10 ℃, the electromagnetic coil 411 is kept in an electrified state, the control valve assembly 4 is continuously connected with the butterfly valve 3, water in the outdoor water supply vertical pipe 1 is continuously discharged from the water discharge branch pipe 2 at a low flow rate, the pipeline water flow is ensured, and freezing damage is prevented.
The working principle is as follows:
after the temperature is lower than 0 ℃ in winter, a low-temperature early warning is started, whether the pressure change senses whether the water in the pipeline flows or not is observed through a pressure sensor, if the water does not flow, the electromagnetic coil 411 is electrified, the electromagnetic coil 411 sucks the sliding pin 32 into the waist hole 410 through magnetic force, the control water pipe 47 is communicated with the outdoor water supply vertical pipe 1, the water in the outdoor water supply vertical pipe 1 enters the hydraulic cavity 46 through the control water pipe 47, the water pressure overcomes the acting force of the regulating spring 45 to push the sliding valve 43 to move relative to the regulating spring 45, the sliding valve 43 drives the control rod 49 to move, the control rod 49 drives the handle 31 to rotate through the sliding pin 32, the sliding pin 32 slides in the waist hole 410, the handle 31 drives the butterfly valve 3 to be opened, if the water in the outdoor water supply vertical pipe 1 is discharged through the drain branch pipe 2, the water pressure is larger in the initial stage, the opening degree of the butterfly valve 3 is higher, the fast flowing water can dredge slight blockage in the outdoor water supply vertical pipe 1, the water in the control water pipe 47 is reduced along with the complete discharge of the water in the outdoor water supply vertical pipe 1, the water pressure in the control water pipe 47 drives the sliding valve 43 to move towards the opposite direction to the regulating spring 45 under the action of the regulating spring 45, the sliding valve 43 drives the sliding valve 43 to move towards the sliding valve 43, and the opposite direction to the sliding valve 43 moves towards the waist hole 49, and is completely closes the butterfly valve 3 through the electromagnetic coil 3 when the butterfly valve 3 is gradually closed, and the butterfly valve 3 is completely closes the butterfly valve 3, and is gradually closed when the butterfly valve 3 is completely to slide valve is completely closed;
when the temperature is lower than minus 10 ℃, the electromagnetic coil 411 is kept in an electrified state, the butterfly valve 3 is always in an open state, the opening of the butterfly valve 3 can be automatically adjusted according to the change of water pressure, and the smoothness of a pipeline is ensured; according to the invention, the water in the outdoor water supply vertical pipe 1 is partially or completely discharged through the arrangement of the water discharge branch pipe 2, so that the frost damage of a pipeline is prevented, the electromagnetic coil 411 is arranged to enable the time control valve assembly 4 to be connected with the butterfly valve 3 only when water is required to be discharged, the phenomenon that the butterfly valve 3 is opened due to sudden change of water pressure in the outdoor water supply vertical pipe 1 to cause water waste is avoided, and the device can automatically adjust the water discharge speed of the water discharge branch pipe 2 according to the water pressure, so that the smoothness of the pipeline is ensured.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention. The protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (6)
1. The utility model provides a pipeline protection device that prevents frostbite, its top of installing at outdoor water supply riser, its characterized in that: the device comprises a drainage branch pipe, a butterfly valve, a detection assembly and a control valve assembly, wherein the drainage branch pipe is communicated with an outdoor water supply vertical pipe, the butterfly valve for controlling the on-off of the drainage branch pipe is arranged on the drainage branch pipe, the control valve assembly is arranged above the butterfly valve and is arranged on the outdoor water supply vertical pipe, the control valve assembly is matched with the butterfly valve, and the detection assembly is arranged on the outdoor water supply vertical pipe and is electrically connected with the control valve assembly;
the control valve assembly comprises a control valve block, the control valve block is arranged on an outdoor water supply vertical pipe, a left-right through cavity is arranged in the control valve block, a slide valve is connected in the cavity in a sliding mode, one end of the control valve block is provided with an adjusting nut in an internal threaded mode, an adjusting spring is arranged between the adjusting nut and the slide valve, one end of the control valve block, which is far away from the adjusting nut, is provided with a hydraulic cavity in an external threaded mode, one end of the slide valve, which is far away from the adjusting spring, is arranged in the hydraulic cavity in a sliding mode, one end of the hydraulic cavity, which is far away from the control valve block, is connected with a control water pipe, the control water pipe is communicated with the outdoor water supply vertical pipe, the lower end of the control valve block is provided with a slide way which penetrates through the cavity, the slide valve slides along the slide way in a threaded mode, one end of the slide valve, which is far away from the slide valve, is provided with a waist hole, an electromagnetic coil is wound on the control rod along the waist hole, the waist hole is arranged above the butterfly valve, and the control rod is connected with the butterfly valve after being electrified.
2. The pipe frost crack prevention protection device of claim 1, wherein: the upper end of butterfly valve is equipped with the handle, and the tip of handle is equipped with the sliding pin along vertical direction through sliding connection's mode, and the sliding pin slides into the waist downthehole under solenoid's attraction after the circular telegram.
3. The pipe frost crack prevention protection device of claim 1, wherein: the outside of the control water pipe is wrapped with heat preservation foam.
4. The pipe frost crack prevention protection device of claim 1, wherein: and a shutoff electromagnetic valve is arranged on the control water pipe.
5. The pipe frost crack prevention protection device of claim 1, wherein: one end of the slide valve, which is far away from the adjusting spring, is provided with a boss, and the outer edge of the boss is provided with a sealing ring.
6. The pipe frost crack prevention protection device of claim 1, wherein: the detection assembly comprises a temperature sensor and a pressure sensor, wherein the temperature sensor and the pressure sensor are both installed on the outdoor water supply vertical pipe, and the temperature sensor and the pressure sensor are both electrically connected with the control valve assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810631686.2A CN108487376B (en) | 2018-06-19 | 2018-06-19 | Pipeline frost crack protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810631686.2A CN108487376B (en) | 2018-06-19 | 2018-06-19 | Pipeline frost crack protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108487376A CN108487376A (en) | 2018-09-04 |
| CN108487376B true CN108487376B (en) | 2023-11-24 |
Family
ID=63343052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810631686.2A Active CN108487376B (en) | 2018-06-19 | 2018-06-19 | Pipeline frost crack protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108487376B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113404449A (en) * | 2021-06-07 | 2021-09-17 | 丹东市智林测控技术研究所 | Anti-freezing method for rotary steering down-transmission code sending pipeline |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061383A (en) * | 2012-12-25 | 2013-04-24 | 于统之 | Intelligent anti-freezing control device of multifunctional water supply and discharge pipeline and work method |
| CN203240056U (en) * | 2013-03-09 | 2013-10-16 | 李文义 | Electric switch type anti-freezing tap water faucet |
| CN105135143A (en) * | 2015-06-18 | 2015-12-09 | 山东钢铁股份有限公司 | Pipeline anti-freeze drainer and application method thereof |
| CN106480956A (en) * | 2016-11-16 | 2017-03-08 | 山东农业大学 | The antifreeze flushing system of lavatory |
| CN206347177U (en) * | 2016-11-24 | 2017-07-21 | 广东克劳迪卫浴科技股份有限公司 | A kind of belt sensor automatic outletting defroster |
| CN206986972U (en) * | 2017-07-21 | 2018-02-09 | 郝存继 | A kind of antifreeze control valve |
| CN208455721U (en) * | 2018-06-19 | 2019-02-01 | 芜湖华衍水务有限公司 | A kind of pipeline frost crack preventing protective device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9523624B2 (en) * | 2015-04-07 | 2016-12-20 | Chantry Davis | Method and maintenance system for testing and clearing freezeless water hydrants |
-
2018
- 2018-06-19 CN CN201810631686.2A patent/CN108487376B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061383A (en) * | 2012-12-25 | 2013-04-24 | 于统之 | Intelligent anti-freezing control device of multifunctional water supply and discharge pipeline and work method |
| CN203240056U (en) * | 2013-03-09 | 2013-10-16 | 李文义 | Electric switch type anti-freezing tap water faucet |
| CN105135143A (en) * | 2015-06-18 | 2015-12-09 | 山东钢铁股份有限公司 | Pipeline anti-freeze drainer and application method thereof |
| CN106480956A (en) * | 2016-11-16 | 2017-03-08 | 山东农业大学 | The antifreeze flushing system of lavatory |
| CN206347177U (en) * | 2016-11-24 | 2017-07-21 | 广东克劳迪卫浴科技股份有限公司 | A kind of belt sensor automatic outletting defroster |
| CN206986972U (en) * | 2017-07-21 | 2018-02-09 | 郝存继 | A kind of antifreeze control valve |
| CN208455721U (en) * | 2018-06-19 | 2019-02-01 | 芜湖华衍水务有限公司 | A kind of pipeline frost crack preventing protective device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108487376A (en) | 2018-09-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107806334B (en) | Full wireless integrated type electric antifreezing regulation stop composite valve interval intelligent gas production system | |
| CN108487376B (en) | Pipeline frost crack protection device | |
| CN208455721U (en) | A kind of pipeline frost crack preventing protective device | |
| CN104235487B (en) | A kind of anti-theft antifreezing valve | |
| CN109610401B (en) | Water conservancy water and electricity gate upstream face anti-freezing device | |
| CN201593609U (en) | Water escape valve with low-temperature automatic drainage function | |
| CN201599413U (en) | Combined water drain valve with low-temperature automatic drainage function | |
| CN103453652B (en) | Split control anti-freezing gas water heater | |
| CN213361192U (en) | Open-close self-release type anti-freezing stop valve | |
| CN206300317U (en) | Cold district air-conditioner water system combines defroster | |
| CN109058566A (en) | One kind is cut off the water self closing device | |
| CN204114330U (en) | A kind of anti-theft antifreezing valve | |
| CN202017794U (en) | Solar anti-freezing electric ball valve | |
| CN112128418A (en) | Open-close self-release type anti-freezing stop valve | |
| CN204372319U (en) | A kind of automatic electric-heating vent ball valve | |
| CN107131350B (en) | Flexibly adjustable antifreezing relief valve | |
| CN202254422U (en) | Anti-freezing device for solar water heater pipeline | |
| CN201412550Y (en) | Safety antifreeze ball valve | |
| CN201354865Y (en) | Solar energy anti-frost valve | |
| CN219549721U (en) | Antifreezing valve | |
| CN203657249U (en) | Solar water heater water in-out pipe anti-freezing anti-blocking device | |
| CN202581824U (en) | Automatic draining device for gas water heater | |
| CN111637246B (en) | Valve with anti-freezing function | |
| CN213393728U (en) | Winter temperature control regulating valve with flow-discharging anti-freezing structure | |
| CN201093097Y (en) | Solar water heater pipeline anti-freezing valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |