CN216197999U - Automatic anti-freezing wellhead heating device - Google Patents
Automatic anti-freezing wellhead heating device Download PDFInfo
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- CN216197999U CN216197999U CN202122590559.2U CN202122590559U CN216197999U CN 216197999 U CN216197999 U CN 216197999U CN 202122590559 U CN202122590559 U CN 202122590559U CN 216197999 U CN216197999 U CN 216197999U
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Abstract
The utility model discloses an autonomous anti-freezing wellhead heating device which is arranged at an air duct below a wellhead. The wellhead heating device comprises a finned tube heat exchanger arranged at the side hung sealing door, a water inlet of the finned tube heat exchanger is communicated with a heating water inlet pipe, and a water outlet of the finned tube heat exchanger is communicated with a heating water outlet pipe; the first electric valve is arranged on the water inlet pipe; the third electric valve is arranged on the water outlet pipe; one end of the first bypass pipe is communicated with the upstream of the first electric valve, and the other end of the first bypass pipe is communicated with the downstream of the third electric valve; one end of the second bypass pipe is arranged at the downstream of the first electric valve, and the other end of the second bypass pipe is communicated with the upstream of the third electric valve; the electric heater is arranged on the second bypass pipe; the first temperature sensor is arranged on the water inlet pipe and is positioned at the upstream of the connection point of the first bypass pipe and the water inlet pipe; the controller is electrically connected with the first electric valve, the third electric valve, the electric heater and the first temperature sensor. Therefore, the automatic heating and freeze prevention at the wellhead can be realized.
Description
Technical Field
The utility model relates to the technical field of coal mine air inlet anti-freezing, in particular to an automatic anti-freezing wellhead heating device.
Background
The well mouth is prevented frostbite and is an important part of coal mine safety production, in cold areas, the outdoor temperature is below 0 ℃ for a long time in winter, the seepage water on the wall of the well bore is frozen in the low temperature environment, and the ice can slide for a long time, which causes great life threat to workers, therefore, the well mouth is prevented frostbite in winter and is a necessary measure for coal mine safety production.
The existing wellhead heating device is mainly a matched axial flow fan of a finned tube dividing wall type heat exchanger. The principle is that after high-temperature water enters the heat exchanger, the axial flow fan guides outdoor air to pass through the heat exchanger to absorb heat of the high-temperature water inside the heat exchanger, and temperature rise of outdoor fresh air is achieved. When a heat supply system has problems or a gap is formed in heat source supply, high-temperature water entering the heat exchanger can be changed into low-temperature water, and expansion pipes or pipe wall breakage can be caused by icing inside the heat exchanger.
The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an autonomous anti-freezing wellhead heating device which can realize autonomous heating, effectively prevent a low-temperature heat exchanger from being damaged, avoid the occurrence of wellhead ice skating and ensure the safe construction of workers.
In order to achieve the purpose, the utility model provides an autonomous anti-freezing wellhead heating device which is arranged at an air channel below a wellhead, wherein a vertical hinged sealing door is arranged at the air channel; the finned tube heat exchanger is arranged at the side hung sealing door, a water inlet of the finned tube heat exchanger is communicated with a heating water inlet pipe, and a water outlet of the finned tube heat exchanger is communicated with a heating water outlet pipe; the first electric valve is arranged on the water inlet pipe; the third electric valve is arranged on the water outlet pipe; one end of the first bypass pipe is communicated with the upstream of the first electric valve, and the other end of the first bypass pipe is communicated with the downstream of the third electric valve; one end of the second bypass pipe is arranged at the downstream of the first electric valve, and the other end of the second bypass pipe is communicated with the upstream of the third electric valve; the electric heater is arranged on the second bypass pipe; the first temperature sensor is arranged on the water inlet pipe and is positioned at the upstream of the connection point of the first bypass pipe and the water inlet pipe; the controller is electrically connected with the first electric valve, the third electric valve, the electric heater and the first temperature sensor.
In a preferred embodiment, the autonomous antifreeze wellhead heating apparatus further comprises a second electrically operated valve and a fourth electrically operated valve; the second electric valve is arranged on the second bypass pipe and is electrically connected with the controller; the fourth electric valve is arranged on the first bypass pipe and electrically connected with the controller.
In a preferred embodiment, when the first temperature sensor senses that the water temperature in the water inlet pipe is lower than the set water temperature value, the controller controls the heater to start heating, and at the moment, the controller controls the first electric valve and the third electric valve to close and controls the second electric valve and the fourth electric valve to open.
In a preferred embodiment, the water temperature setpoint for the inlet line is taken offline at 15 ℃.
In a preferred embodiment, when the first temperature sensor senses that the water temperature of the water inlet pipe is higher than the set water temperature value, the controller controls the heater to stop heating, and at the moment, the controller controls the first electric valve and the third electric valve to be opened and controls the second electric valve and the fourth electric valve to be closed.
In a preferred embodiment, the water temperature setpoint for the inlet line is 30 ℃.
In a preferred embodiment, the autonomous antifreeze wellhead heating device further comprises a second temperature sensor and a circulation pump; the second temperature sensor is arranged on the second bypass pipe and is electrically connected with the controller, and the second temperature sensor is used for monitoring the temperature of the inlet water of the finned tube heat exchanger to be kept above 0 ℃; the circulating pump sets up on the second bypass pipe, and the circulating pump is used for promoting the circulation of the water in the return circuit that electric heater, second electric valve, inlet tube, finned tube heat exchanger and outlet pipe formed.
In a preferred embodiment, the autonomous anti-freezing wellhead heating device further comprises an axial flow fan which is arranged between the vertical hinged closing door and the finned tube heat exchanger, when the electric heater starts heating, the controller controls the axial flow fan and the flat opening and closing door to be closed, and when the electric heater is closed to heat, the controller controls the axial flow fan and the flat opening and closing door to be opened.
In a preferred embodiment, the autonomous antifreeze wellhead heating device further comprises a shock absorber and an electric rotating shaft; the shock absorber is arranged at the axial flow fan; the electric rotating shaft is arranged at the side-hung closed door and is electrically connected with the controller, and the controller controls the side-hung closed door to be opened or closed through the electric rotating shaft.
In a preferred embodiment, the autonomous anti-freezing wellhead heating device further comprises an independent water replenishing device which is communicated with the second bypass pipe and is used for replenishing water in a loop formed by the electric heater, the second electric valve, the water inlet pipe, the finned tube heat exchanger and the water outlet pipe.
Compared with the prior art, the autonomous anti-freezing wellhead heating device has the following beneficial effects: this scheme is through setting up automatic heating antifreeze components such as electric heater and controller that set up on first bypass pipe and second bypass pipe and the second bypass pipe between the inlet tube and the outlet pipe of major loop, can play the effectual phenomenon that prevents to damage the heat exchanger because of low temperature, when breach appears in heating system problem occurrence or heat source supply, can realize the closed heating to the water in the heat exchanger, make it have the frost-proof function of initiative, low temperature water has stopped in the heat exchanger leads to inside to freeze the pipe that rises or the cracked emergence of pipe wall. Meanwhile, the phenomenon of ice skating at the well mouth is avoided, and the personal safety of workers is ensured. Moreover, the scheme has the advantages of simple structure, novel design, low maintenance cost and wide popularization convenience.
Drawings
FIG. 1 is a schematic diagram of the component arrangement of a wellhead heating device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a controller and its control elements according to an embodiment of the present invention.
Description of the main reference numerals:
the system comprises a water inlet pipe 1, a first temperature sensor 2, a first bypass pipe 3, a first electric valve 4, a second electric valve 5, a second temperature sensor 6, a finned tube heat exchanger 7, a shock absorber 8, an electric rotating shaft 9, a vertical hinged closing door 10, an air duct 11, an axial flow fan 12, a second bypass pipe 13, a circulating pump 14, an electric heater 15, a third electric valve 16, a water outlet pipe 17, a fourth electric valve 18 and a controller 19.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1 to 2, the wellhead heating device of the autonomous anti-freezing type according to the preferred embodiment of the present invention is generally mainly arranged at an air duct 11 below the wellhead, and a side hung closing door 10 is generally arranged at the air duct 11. The well head heating device is provided with the anti-freezing unit of automatic cycle heating, and the hot-blast feeding that the anti-freezing unit of automatic cycle heating gived off is in 11 departments of wind channel, for 11 top well heads in wind channel department heat, can prevent effectively that well head department from the appearance of skating phenomenon, has guaranteed staff's personal safety.
Referring to fig. 1 and 2, in some embodiments, the wellhead heating device generally includes a finned tube heat exchanger 7, a first electrically operated valve 4, a third electrically operated valve 16, a first bypass pipe 3, a second bypass pipe 13, an electric heater 15, a first temperature sensor 2, a controller 19, and the like. The finned tube heat exchanger 7 is arranged at the position of the vertical hinged sealing door 10, a water inlet of the finned tube heat exchanger 7 is communicated with the heating water inlet pipe 1, and a water outlet of the finned tube heat exchanger 7 is communicated with the heating water outlet pipe 17. The first electrically operated valve 4 is provided on the inlet pipe 1. A third electrically operated valve 16 is provided on the outlet pipe 17. The first bypass line 3 communicates at one end upstream of the first electrically operated valve 4 and at the other end downstream of the third electrically operated valve 16. One end of the second bypass line 13 is disposed downstream of the first electrically actuated valve 4 and the other end communicates upstream of the third electrically actuated valve 16. An electric heater 15 is provided on the second bypass pipe 13. The first temperature sensor 2 is arranged on the water inlet pipe 1 and is positioned at the upstream of the connection point of the first bypass pipe 3 and the water inlet pipe 1. The controller 19 is electrically connected to the first electrically operated valve 4, the third electrically operated valve 16, the electric heater 15, and the first temperature sensor 2.
In some embodiments, the autonomous freeze protection type wellhead heating device further comprises a second electrically operated valve 5 and a fourth electrically operated valve 18. The second electrically operated valve 5 is provided on the second bypass pipe 13, and is electrically connected to the controller 19. The fourth electrically operated valve 18 is disposed on the first bypass pipe 3 and electrically connected to the controller 19.
In some embodiments, when the first temperature sensor 2 senses that the water temperature in the water inlet pipe 1 is lower than the water temperature set value, the controller 19 controls the heater to start heating, and at this time, the controller 19 controls the first electric valve 4 and the third electric valve 16 to be closed and controls the second electric valve 5 and the fourth electric valve 18 to be opened. When the first temperature sensor 2 senses that the water temperature of the water inlet pipe 1 is higher than the set water temperature value, the controller 19 controls the heater to close heating, and at the moment, the controller 19 controls the first electric valve 4 and the third electric valve 16 to open and controls the second electric valve 5 and the fourth electric valve 18 to close. The water temperature set value of the water inlet pipe 1 is between 15 ℃ and 30 ℃ from top to bottom. However, the utility model is not limited thereto.
In some embodiments, the autonomous freeze-protected wellhead heating device further comprises a second temperature sensor 6 and a circulation pump 14. The second temperature sensor 6 is disposed on the second bypass pipe 13 and electrically connected to the controller 19, and the second temperature sensor 6 is used for monitoring the temperature of the inlet water of the finned tube heat exchanger 7 to be maintained above 0 ℃, preferably above 5 ℃. A circulation pump 14 is provided on the second bypass pipe 13, the circulation pump 14 serving to promote circulation of water within a circuit formed by the electric heater 15, the second electric valve 5, the water inlet pipe 1, the finned tube heat exchanger 7, and the water outlet pipe 17. When the electric heater 15 stops heating, the circulation pump 14 will also normally stop operating.
In some embodiments, the heating power of the electric heater 15 and the power of the circulation pump 14 can be designed to be adjustable, and when the temperature of the inlet water or the outlet water of the finned tube heat exchanger 7 monitored by the two temperature sensors 6 is lower than 5 ℃, the controller 19 can control the heating power of the electric heater 15 and the power of the circulation pump 14 to be increased to increase the temperature of the circulating water.
In some embodiments, the autonomous antifreeze type wellhead heating apparatus further includes an axial flow fan 12 disposed between the side hung closing door 10 and the finned tube heat exchanger 7, the controller 19 controls the axial flow fan 12 and the flat opening and closing door 10 to be closed when the electric heater 15 starts heating, and the controller 19 controls the axial flow fan 12 and the flat opening and closing door 10 to be opened when the electric heater 15 turns heating off.
In some embodiments, when the first temperature sensor 2 senses that the water temperature in the water inlet pipe 1 is lower than the water temperature set value, the controller 19 controls the heater to start heating, and at this time, the controller 19 controls the first electric valve 4 and the third electric valve 16 to be closed and controls the second electric valve 5 and the fourth electric valve 18 to be opened. At this time, the axial flow fan 12 and the flat opening and closing door 10 may not be closed, but an electric heating wire auxiliary heating device should be added at the air outlet of the axial flow fan 12 to continuously heat the air duct 11 and prevent freezing.
In some embodiments, the autonomous freeze-protected wellhead heating device further comprises a shock absorber 8 and an electrically powered spindle 9. The damper 8 is disposed at the axial flow fan 12 to damp the axial flow fan 12, so that noise can be reduced and the service life of the axial flow fan 12 can be prolonged. The electric rotating shaft 9 is arranged at the side hung closing door 10, the electric rotating shaft 9 is electrically connected with the controller 19, and the controller 19 controls the side hung closing door 10 to be opened or closed through the electric rotating shaft 9.
In some embodiments, the autonomous anti-freezing wellhead heating device further comprises an independent water replenishing device (not shown) generally communicating with the second bypass pipe 13, the independent water replenishing device being configured to replenish water into a loop formed by the electric heater 15, the second electric valve 5, the water inlet pipe 1, the finned tube heat exchanger 7 and the water outlet pipe 17. The independent water replenishing device can avoid water shortage of the loop and air exhaust of the loop.
The main working principle of the autonomous anti-freezing wellhead heating device is as follows:
the automatic circulation heating anti-freezing unit mainly works when the temperature is low to prevent the finned tube heat exchanger 7 from being frozen, and comprises the finned tube heat exchanger 7, an electric heater 15, a controller 19 and a sensor, wherein the finned tube heat exchanger 7 mainly plays a role of exchanging with cold air in the device to prevent the ambient air temperature from being too low, the electric heater 15 works when a heat supply system has problems or a gap is generated in heat source supply, the electric heater 15 heats water to a certain temperature, the sensor mainly measures the temperature of the water and then transmits the temperature to the controller 19, the water inlet end of the electric heater 15 is connected with a water outlet pipe 17, the water outlet end of the electric heater 15 is connected with the water inlet end of the finned tube heat exchanger 7 through a water inlet pipe 1, the water outlet end of the finned tube heat exchanger 7 is connected with the water outlet pipe 17, and the sensor is electrically connected with the input end of the controller 19, an output of the controller 19 is electrically connected to the electric heater 15.
An axial flow fan 12 electrically connected with the output end of the controller 19 is arranged between the air duct 11 and the fin heat exchanger 7, a shock absorber 8 is fixedly arranged at the bottom end of the axial flow fan 12, the axial flow fan 12 mainly accelerates the exchange of hot air around the fin heat exchanger 7 and cold air in the air duct 11 to promote the circulation of the hot air, the shock absorber 8 at the lower part of the axial flow fan 12 plays a role in weakening the shock of the axial flow fan 12, reducing the co-shock probability and preventing the axial flow fan 12 from being damaged,
the air duct 11 is provided with a vertical hinged sealing door 10, the vertical hinged sealing door 10 mainly plays a role in communicating and isolating the air duct 11 with the finned tube heat exchanger 7 and the axial flow fan 12, and the vertical hinged sealing door 11 is arranged corresponding to the axial flow fan 12.
The electric rotating shafts 9 are symmetrically arranged on the vertical hinged closing door 10, the electric rotating shafts 9 mainly control the opening and closing of the vertical hinged closing door 10, and the electric rotating shafts 9 are electrically connected with the output end of the controller 19.
The sensor includes first temperature sensor 2 and second temperature sensor 6, and second temperature sensor 6 sets up the play water end at heater 15, and when second temperature sensor mainly measured automatic cycle heating, the temperature in the water pipe, first temperature sensor 2 sets up the department of intaking at inlet tube 1, and first temperature sensor 2 mainly measures the temperature of intaking, and first temperature sensor 2 and second temperature sensor 6 all are connected with the input electricity of controller 19.
Be equipped with first electric valve 4 on the inlet tube 1 of being connected with finned tube heat exchanger 7, be equipped with third electric valve 16 on outlet pipe 17, first electric valve 4 and third electric valve 16 all are connected with controller 19's output electricity, be equipped with first bypass pipe 3 and third electric valve 16 between third electric valve 16 and the inlet tube 1, 3 one end of first bypass pipe is linked together with inlet tube 1, the other end is linked together with outlet pipe 17, be equipped with fourth electric valve 18 on the first bypass pipe 3, fourth electric valve 18 is connected with controller 19's output electricity. When the high-temperature water is normal, the second electric valve 5, the fourth electric valve 18 and the electric heater 15 are all in a closed state; the first electric valve 4 and the third electric valve 16 are in an opening state, the vertical hinged sealing door 10 is opened, normal ventilation is achieved, and the finned tube heat exchanger 7 and the axial flow fan 12 work normally.
A second bypass pipe 13 is arranged between the third electric valve 16 and the water inlet end of the electric heater 15, one end of the second bypass pipe 13 is communicated with a water outlet pipe 17, the other end of the second bypass pipe is connected with the water inlet end of the electric heater 15, the water outlet of the electric heater 15 is connected with the water inlet pipe 1 through a branch pipe, a second electric valve 5 is arranged on the branch pipe, the second electric valve 5 is electrically connected with the output end of the controller 19, a circulating pump 14 is arranged on the second bypass pipe 13, the circulating pump 14 mainly plays a role in promoting the circulation of water in the pipeline, and the circulating pump 14 is electrically connected with the output end of the controller 19. When a heat supply system has a problem or a gap is generated in heat source supply, the temperature of fluid entering the finned tube heat exchanger 7 from the water inlet tube 1 is reduced, when the temperature of inlet water is lower than 15 ℃, the first temperature sensor 2 transmits a signal to the controller 19, the controller 19 opens the second electric valve 5 and the fourth electric valve 18 through electric signal output, the first electric valve 4 and the third electric valve 16 are closed, the axial flow fan 12 is closed, and the side hung sealing door 10 is closed through controlling the electric rotating shaft 9. The feed water to the finned tube heat exchanger 7 is returned directly to the outlet pipe 17 through the first bypass pipe 3. The finned tube heat exchanger 7 forms a closed heating cycle through the water inlet pipe 1, the water outlet pipe 17, the electric heater 15, the circulating pump 14 and the second bypass pipe 13, and the second temperature sensor 6 can monitor the water inlet temperature of the finned tube heat exchanger 7 at the moment and maintain the temperature of the water inlet of the finned tube heat exchanger above 0 ℃ all the time. After the axial flow fan 12 is closed, the vertical hinged closing door 10 is closed to enable the interior of the air duct 11 to be under negative pressure, even if the axial flow fan does not work, outdoor fresh air can also penetrate through the finned tube heat exchanger 7 to flow back into the air duct 11, heat dissipation inside the finned tube heat exchanger 7 can be aggravated, and the heating device cannot heat the inlet water to be above 0 ℃. When the first temperature sensor 2 recovers the real-time inlet water temperature to be higher than 30 ℃, the second electric valve 5, the fourth electric valve 18, the electric heater 15 and the circulating pump 14 are closed, and the first electric valve 4, the third electric valve 16, the side hung sealing door 10 and the axial flow fan 12 are opened.
In conclusion, the autonomous anti-freezing wellhead heating device has the following advantages: this scheme is through setting up automatic heating antifreeze components such as electric heater and controller that set up on first bypass pipe and second bypass pipe and the second bypass pipe between the inlet tube and the outlet pipe of major loop, can play the effectual phenomenon that prevents to damage the heat exchanger because of low temperature, when breach appears in heating system problem occurrence or heat source supply, can realize the closed heating to the water in the heat exchanger, make it have the frost-proof function of initiative, low temperature water has stopped in the heat exchanger leads to inside to freeze the pipe that rises or the cracked emergence of pipe wall. Meanwhile, the phenomenon of ice skating at the well mouth is avoided, and the personal safety of workers is ensured. Moreover, the scheme has the advantages of simple structure, novel design, low maintenance cost and wide popularization convenience.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the utility model and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the utility model and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (10)
1. The utility model provides an independently prevent frostbite type well head heating device, its setting is in the wind channel department of well head below, wind channel department is provided with the flat-open and seals the door, its characterized in that, well head heating device includes:
the finned tube heat exchanger is arranged at the side hung sealing door, a water inlet of the finned tube heat exchanger is communicated with a heating water inlet pipe, and a water outlet of the finned tube heat exchanger is communicated with a heating water outlet pipe;
the first electric valve is arranged on the water inlet pipe;
the third electric valve is arranged on the water outlet pipe;
a first bypass line having one end in communication with an upstream side of the first electrically operated valve and the other end in communication with a downstream side of the third electrically operated valve;
a second bypass pipe having one end disposed downstream of the first electrically operated valve and the other end communicating upstream of the third electrically operated valve;
an electric heater provided on the second bypass pipe;
the first temperature sensor is arranged on the water inlet pipe and is positioned at the upstream of the connection point of the first bypass pipe and the water inlet pipe; and
a controller electrically connected to the first electrically operated valve, the third electrically operated valve, the electric heater, and the first temperature sensor.
2. The autonomous antifreeze wellhead heating apparatus of claim 1, further comprising:
the second electric valve is arranged on the second bypass pipe and is electrically connected with the controller; and
and the fourth electric valve is arranged on the first bypass pipe and is electrically connected with the controller.
3. The autonomous antifreeze wellhead heating device of claim 2, wherein said controller controls said heater to start heating when said first temperature sensor senses that the temperature of the water in said inlet pipe is below a water temperature set point, wherein said controller controls said first and third electrically operated valves to close and controls said second and fourth electrically operated valves to open.
4. The apparatus of claim 3, wherein the inlet line has a water temperature setpoint of 15 ℃.
5. The autonomous antifreeze wellhead heating device of claim 2, wherein when the first temperature sensor senses that the water temperature in the inlet pipe is higher than the set water temperature, the controller controls the heater to close heating, and when the controller controls the first and third electrically operated valves to open and controls the second and fourth electrically operated valves to close.
6. The autonomous antifreeze wellhead heating apparatus of claim 5, wherein the water temperature setpoint of said inlet pipe is 30 ℃ on line.
7. The autonomous antifreeze wellhead heating apparatus of claim 2, further comprising:
the second temperature sensor is arranged on the second bypass pipe and is electrically connected with the controller, and the second temperature sensor is used for monitoring the temperature of inlet water of the finned tube heat exchanger to be kept above 0 ℃; and
a circulation pump disposed on the second bypass pipe, the circulation pump to promote circulation of water within a circuit formed by the electric heater, the second electrically-operated valve, the water inlet pipe, the finned tube heat exchanger, and the water outlet pipe.
8. The autonomous antifreeze wellhead heating device according to claim 3 or 5, further comprising an axial flow fan disposed between the side hung closing door and the finned tube heat exchanger, wherein the controller controls the axial flow fan and the side hung closing door to be closed when the electric heater is activated to heat, and controls the axial flow fan and the side hung closing door to be opened when the electric heater is deactivated to heat.
9. The autonomous antifreeze wellhead heating apparatus of claim 8, further comprising:
a damper provided at the axial flow fan; and
the electric rotating shaft is arranged at the position of the side-hung closed door, the electric rotating shaft is electrically connected with the controller, and the controller controls the opening or closing of the side-hung closed door through the electric rotating shaft.
10. The apparatus of claim 7, further comprising an independent water replenishment means in communication with the second bypass line, the independent water replenishment means for replenishing water in a circuit formed by the electric heater, the second electrically operated valve, the inlet tube, the finned tube heat exchanger and the outlet tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122590559.2U CN216197999U (en) | 2021-10-27 | 2021-10-27 | Automatic anti-freezing wellhead heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122590559.2U CN216197999U (en) | 2021-10-27 | 2021-10-27 | Automatic anti-freezing wellhead heating device |
Publications (1)
| Publication Number | Publication Date |
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| CN216197999U true CN216197999U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122590559.2U Active CN216197999U (en) | 2021-10-27 | 2021-10-27 | Automatic anti-freezing wellhead heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216197999U (en) |
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2021
- 2021-10-27 CN CN202122590559.2U patent/CN216197999U/en active Active
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