Wellhead anti-freezing heating system using mine waste heat
By designing a wellhead antifreeze heating system, the waste heat of the mine is used to form water droplets to remove dust, increasing the contact time between hot air and thermal energy components, solving the problem of unstable waste heat supply in the mine, and achieving continuous insulation and antifreeze effects at the wellhead.
Patent Information
- Application Number
- CN202310448730.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-04-24
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2043-04-24
AI Technical Summary
The existing mine waste heat heating device releases heat unstably in cold weather, cannot continuously and effectively protect the wellhead, and does not insulate the outside of the wellhead, resulting in temperature difference damage.
A wellhead antifreeze heating system is designed, which includes a debris preventer, an insulation shell, a pipe nozzle and a return device. The system optimizes heat utilization and transfer by forming water droplets to remove dust, increasing the contact time between hot gas and thermal energy components, and reducing pressure and increasing frictional heat.
Effectively prevent wellhead from freezing, prolong heat duration, reduce heat loss, prevent temperature difference damage, and improve wellhead antifreeze effect.
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Figure CN116464417B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wellhead anti-freezing heating, in particular to a wellhead anti-freezing heating system using mine waste heat. BACKGROUND
[0002] The anti-freezing facilities of wellhead are very important for all enterprises in northern China that carry out underground mining, once the wellhead or shaft freezes, the production of the entire mine will be stagnant, so the relevant industry design specifications of the state have a complete set of technical regulations for wellhead anti-freezing, which requires production mines to set up perfect and reliable heating equipment. In actual engineering applications, since the wellhead is the entrance of underground ventilation, the ventilation volume is quite large, in winter, if you want to stably heat a large amount of cold air entering the wellhead to not less than the temperature specified in the technical standard for a long time, the required heat supply is quite large.
[0003] For the existing mine waste heat to the wellhead heating device, only the heat from the bottom of the mine is saved, and then the heat is released to the wellhead little by little, although this can effectively protect the wellhead, but in cold weather, the released heat is like a drop in the ocean and cannot maintain the sustainability of the protection of the wellhead, in addition, the storage of heat is also very fast in cold weather, in addition, the existing heating only insulates the inside of the wellhead, but does not insulate the outside of the wellhead, which will cause the temperature inside the well to be higher than the outside, thereby causing temperature difference damage to the wellhead. SUMMARY
[0004] In order to achieve the above purpose, the present application is realized by the following technical scheme: a wellhead anti-freezing heating system using mine waste heat, comprising a foreign matter preventer, a heat preservation sleeve, a pipe opening and a reflux device, the bottom of the foreign matter preventer is fixedly connected with the reflux device, the reflux device is inserted in the side of the pipe opening, and the heat preservation sleeve is fixedly installed on the outside of the pipe opening.
[0005] The foreign matter preventer comprises a cold cover, the outer side of the cold cover is fixedly connected with a sliding plate, the bottom side of the sliding plate is fixedly connected with a cold flow rail, the bottom of the cold flow rail is inserted with an outlet pipe, the end of the outlet pipe away from the cold flow rail is fixedly connected with a collecting ring, the bottom of the collecting ring is fixedly connected with a transition pipe, and the end of the transition pipe away from the collecting ring is fixedly connected with the reflux device; a part of the hot gas flowing out from the inside of the pipe opening will directly float on the bottom of the cold cover, the surface of the cold cover is cold, therefore, when the hot gas meets the cold, water droplets will be formed, and with the accumulation of the water droplets, its own weight will also rise, at this time, the water droplets will slide along the edge of the cold cover to the direction of the sliding plate, so as to achieve the effect of removing the dust accumulated on the top of the sliding plate.
[0006] The backflow device comprises a backflow component which is inserted on the side of the pipe opening, and a part of the backflow component outside the pipe opening is arranged inside the heat preservation sleeve, and a heat energy device is fixedly arranged inside the pipe opening and at the bottom of the backflow component.
[0007] Preferably, the heat energy device comprises a sleeve, and a conveying pipe is inserted on the outside of the sleeve, and a heat energy component is arranged on the end of the conveying pipe away from the sleeve.
[0008] Preferably, an outer shell is fixedly connected inside the sleeve, a spiral auger is slidingly arranged inside the outer shell, and a trapezoidal seat is slidingly arranged on the inner side of the spiral auger. Most of the hot gas overflowing out of the pipe opening will enter the outer shell, and then the hot gas will move upward along the spiral auger, and the spiral auger can increase the contact time of the hot gas with the heat energy component, and the heat energy component is connected with the pipe opening, so that the duration of the heat of the pipe opening can be greatly improved.
[0009] Preferably, a cross is fixedly connected on the top of the trapezoidal seat, an inner sliding plate is fixedly connected on the bottom of the cross, the inner sliding plate is slidingly connected with the spiral auger, an inner shell is arranged on the outer side of the inner sliding plate, and the inner shell is slidingly arranged on the outer side of the outer shell.
[0010] Preferably, a top hole is arranged on the side of the inner shell which is in contact with the outer shell, a middle shell is slidingly arranged on the outer side of the inner shell, a side hole is arranged on the lower half of the middle shell, and the middle shell is fixedly connected on the inner wall of the sleeve. When the cross finally moves into the inner shell and presses the inner shell, the two sides of the inner shell will move upward along the outer shell and the middle shell respectively, so that the top hole blocked by the outer shell will be opened, thereby allowing the heat to flow out of the top hole and preventing the heat from accumulating, and the pressure of the heat can be released.
[0011] Preferably, a double-flow pipe is arranged inside the heat energy component, the double-flow pipe is fixedly connected with the conveying pipe, a heat outlet horn is fixedly connected on the end of the double-flow pipe away from the conveying pipe, and a heating element is fixedly connected on the middle section of the double-flow pipe.
[0012] Preferably, the heating element comprises an insertion shell, the upper and lower ends of the insertion shell are fixedly connected with the double-flow pipe, a friction shell is fixedly arranged inside the insertion shell, and an outer hole is arranged on the inner side of the friction shell.
[0013] Preferably, the center part of the shell is provided with a friction block, the top end of the friction block is fixedly connected with a limiting block, the bottom of the friction block is fixedly connected with a spring, and the bottom end of the spring is fixedly connected with the double-flow pipe.
[0014] Preferably, the backflow assembly comprises a flow pipe, the outer side of the flow pipe is inserted with a backflow pipe, the flow pipe is inserted on the surface of the pipe opening, and the inner side of the flow pipe is fixedly connected with a sliding rail.
[0015] Preferably, the inner side of the sliding rail is slidingly provided with a blocking plate, the side, away from the flow pipe, of the blocking plate is fixedly connected with a push plate, and the end face of the sliding rail is fixedly connected with a limiting plate. The heat from the heat outlet horn enters the flow pipe, the blocking plate provided in the flow pipe is slidingly arranged on the sliding rail, the outer side of the blocking plate is fixedly connected with the push plate, the hot gas impacts the push plate, the push plate drives the blocking plate to move along the sliding rail, the hole blocked by the sliding rail is opened, and then part of the hot gas enters another flow pipe.
[0016] The application provides a wellhead anti-freezing heating system utilizing mine waste heat.
[0017] I. The wellhead anti-freezing heating system utilizing mine waste heat, when the hot gas meets cold, water beads are formed, the weight of the water beads increases with the accumulation of the water beads, the water beads slide along the edge of the cold cover towards the direction of the sliding plate, and the dust accumulated on the top of the sliding plate is removed.
[0018] II. The wellhead anti-freezing heating system utilizing mine waste heat, the temperature of the hot gas does not completely decrease in the first time when the hot gas meets the cold cover to form water beads, therefore, in the case of snowfall, the water beads with a certain temperature melt the snow, and the collapse and accumulation caused by snowfall are prevented to a certain extent.
[0019] III. The wellhead anti-freezing heating system utilizing mine waste heat, most of the hot gas flowing out of the pipe opening enters the shell, the hot gas moves upwards along the spiral auger, the spiral auger increases the contact time of the hot gas and the heat energy assembly, the heat energy assembly is connected with the pipe opening, and therefore the heat duration of the pipe opening is greatly improved.
[0020] Fourth, the wellhead antifreeze heating system that uses waste heat from the mine for heating will eventually cause the two sides of the inner shell to move upward along the outer shell and the middle shell respectively through the rising hot air, so that the top hole blocked by the outer shell will be opened, thereby allowing heat to flow from the top hole, preventing heat accumulation, and at the same time relieving heat pressure.
[0021] 5. The wellhead antifreeze heating system that uses waste heat from the mine for heating does not keep the friction block in an upward state all the time, but is always in a floating state. The bottom of the friction block is installed with a spring, which is used to maximize the floating of the friction block. Therefore, the friction block will continuously rub the friction shell, and the high heat generated by the friction between the two will be absorbed by the hot air. At this time, the heat in the double flow pipe will rise, so as to increase the insulation time and reduce heat loss.
[0022] 6. The wellhead antifreeze heating system that uses waste heat from the mine for heating uses hot air to impact the push plate. At this time, the push plate will drive the blocking plate to move along the slide rail, and the hole blocked by the slide rail will be opened. Then a part of the hot air will enter another flow pipe. The hot air that enters will counter-impact the original flow of hot air, thereby reducing the flow rate of the original flow of hot air and increasing the residence time of the hot air in the flow pipe, so as to achieve the effect of increasing the continuous heating of the pipe mouth. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 This is a schematic diagram of the external structure of a wellhead antifreeze heating system that utilizes mine waste heat for heating according to the present invention;
[0024] Figure 2 This is a schematic cross-sectional view of the structure of the debris preventer of the present invention;
[0025] Figure 3 This is a schematic cross-sectional structural diagram of the reflux device of the present invention;
[0026] Figure 4 This is a schematic cross-sectional view of the heat energy device of the present invention;
[0027] Figure 5 This is a schematic diagram of a partially cutaway enlarged structure of a heat energy device according to the present invention;
[0028] Figure 6 This is a schematic diagram of the structure of the thermal energy component of the present invention;
[0029] Figure 7 This is a schematic cross-sectional view of the heating element of the present invention;
[0030] Figure 8 It is a schematic cross-sectional structural diagram of the reflux assembly of the present invention.
[0031] In the figure: 1, debris preventer; 2, insulation shell; 3, pipe mouth; 4, return flow device; 11, cold cover; 12, slide plate; 13, cold flow rail; 14, collecting ring; 15, transition pipe; 16, outlet pipe; 41, return flow assembly; 42, heat energy device; 421, shell; 422, delivery pipe; 423, heat energy assembly; 424, trapezoidal seat; 425, spiral auger; 426, outer shell; 427, cross; 428, inner shell; 429, middle Shell; 420, inner slide; 4201, top hole; 4202, side hole; 4231, heat outlet horn; 4232, heating element; 4233, double flow pipe; 2321, limit block; 2322, plug shell; 2323, outer hole; 2324, spring; 2325, friction block; 2326, friction shell; 411, flow tube; 412, push plate; 413, blocking plate; 414, slide rail; 415, limit plate; 416, return pipe. DETAILED DESCRIPTION
[0032] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.
[0033] The first embodiment, as Figures 1-2 As shown, the present invention provides a technical solution: a wellhead antifreeze heating system that utilizes mine waste heat for heating, comprising a debris preventer 1, an insulation shell 2, a pipe mouth 3 and a return flow device 4, the bottom of the debris preventer 1 is fixedly connected to the return flow device 4, the return flow device 4 is inserted into the side of the pipe mouth 3, and the insulation shell 2 is fixedly installed on the outside of the pipe mouth 3.
[0034] The anti-mixed device 1 comprises a cold cover 11, and the temperature of the cold cover 11 has not been completely reduced in the first time when the hot gas forms water droplets, so that the water droplets with certain temperature can melt the snow in the case of snowfall, thereby preventing the collapse and accumulation caused by snowfall to a certain extent. The outer side of the cold cover 11 is fixedly connected with a sliding plate 12, the bottom side of the sliding plate 12 is fixedly connected with a cold flow rail 13, the bottom of the cold flow rail 13 is inserted with an outlet pipe 16, the end of the outlet pipe 16 away from the cold flow rail 13 is fixedly connected with a collecting ring 14, the bottom of the collecting ring 14 is fixedly connected with a transition pipe 15, and the end of the transition pipe 15 away from the collecting ring 14 is fixedly connected with the backflow device 4. When the hot gas meets cold, water droplets are formed, and the weight of the water droplets also increases with the accumulation of the water droplets. At this time, the water droplets will slide along the edge of the cold cover 11 towards the sliding plate 12, so as to achieve the effect of removing the dust accumulated on the top of the sliding plate 12.
[0035] The second embodiment, as shown in Figures 3-8 The backflow device 4 comprises a backflow assembly 41, the backflow assembly 41 is inserted on the side of the pipe opening 3, a part of the backflow assembly 41 outside the pipe opening 3 is arranged inside the heat preservation sleeve shell 2, the inside of the pipe opening 3 is fixedly installed with a heat energy device 42, and the heat energy device 42 is arranged at the bottom of the backflow assembly 41.
[0036] The heat energy device 42 comprises a sleeve shell 421, the outer side of the sleeve shell 421 is inserted with a conveying pipe 422, the end of the conveying pipe 422 away from the sleeve shell 421 is sleeved with a heat energy assembly 423, the inside of the sleeve shell 421 is fixedly connected with an outer shell 426, the inside of the outer shell 426 is slidably installed with a spiral auger 425, the inside of the spiral auger 425 is slidably installed with a trapezoidal seat 424, the top of the trapezoidal seat 424 is fixedly connected with a cross 427, the bottom of the cross 427 is fixedly connected with an inner sliding plate 420, the inner sliding plate 420 is slidably connected with the spiral auger 425, the outer side of the inner sliding plate 420 is provided with an inner shell 428, the inner side of the inner shell 428 is slidably installed on the outer side of the outer shell 426, one side of the inner shell 428 in contact with the outer shell 426 is provided with a top hole 4201, the outer side of the inner shell 428 is slidably installed with a middle shell 429, the lower half of the middle shell 429 is provided with a side hole 4202, and the outer side of the middle shell 429 is fixedly connected to the inner wall of the sleeve shell 421. Most of the hot gas flowing out of the pipe opening 3 will enter the outer shell 426, and then the hot gas will move upwards along the spiral auger 425, and the spiral auger 425 can increase the contact time of the hot gas with the heat energy assembly 423, and the heat energy assembly 423 is connected with the pipe opening 3, so that the heat duration of the pipe opening 3 can be greatly improved.
[0037] Through the rising of the hot air, the two sides of the inner shell 428 are finally moved upward along the outer shell 426 and the middle shell 429, so that the top hole 4201 blocked by the outer shell 426 is opened, thereby playing a role of allowing the heat to flow from the top hole 4201 and preventing heat accumulation, and also playing a role of pressure relief of the heat.
[0038] The heat energy assembly 423 is internally provided with a double-flow pipe 4233 fixedly connected with the conveying pipe 422, and the double-flow pipe 4233 is fixedly connected with a heat outlet horn 4231 at an end away from the conveying pipe 422, and a heating piece 4232 is fixedly connected with the middle section of the double-flow pipe 4233.
[0039] The heating piece 4232 comprises an insertion shell 2322 fixedly connected with the double-flow pipe 4233 at both upper and lower ends, and a friction shell 2326 is fixedly installed inside the insertion shell 2322, an outer hole 2323 is formed in the inner side of the friction shell 2326, a friction block 2325 is arranged at the center of the insertion shell 2322, a limiting block 2321 is fixedly connected with the top end of the friction block 2325, a spring 2324 is fixedly connected with the bottom of the friction block 2325, and the bottom end of the spring 2324 is fixedly connected with the double-flow pipe 4233. The friction block 2325 is not always in a rising state, but always in an up-and-down floating state, and the bottom of the friction block 2325 is provided with the spring 2324, which maximizes the floating of the friction block 2325, so that the friction block 2325 continuously rubs the friction shell 2326, and the high heat generated by the rubbing of the two is absorbed by the hot air, so that the heat in the double-flow pipe 4233 rises to increase the heat preservation time and reduce the heat loss.
[0040] The backflow assembly 41 comprises a flow pipe 411, a backflow pipe 416 is inserted on the outer side of the flow pipe 411, the flow pipe 411 is inserted on the surface of the pipe opening 3, a sliding rail 414 is fixedly connected inside the flow pipe 411, a blocking plate 413 is slidingly installed on the inner side of the sliding rail 414, a push plate 412 is fixedly connected with the side of the blocking plate 413 away from the flow pipe 411, and a limiting plate 415 is fixedly connected with the end face of the sliding rail 414. When the hot air impacts the push plate 412, the push plate 412 drives the blocking plate 413 to move along the sliding rail 414, and the hole blocked by the sliding rail 414 is opened, and then part of the hot air enters another flow pipe 411, and the entering hot air impacts the original flowing hot air, thereby reducing the flow rate of the original flowing hot air, and increasing the residence time of the hot air in the flow pipe 411 to increase the heat increase duration of the pipe opening 3.
[0041] When in use, the hot air flowing out from the pipe opening 3 will have a part directly floating on the bottom of the cold cover 11, and the surface of the cold cover 11 is ice-cold, so the hot air will form water droplets when it meets the cold, and the water droplets will rise with their own weight, at this time the water droplets will slide along the edge of the cold cover 11 towards the direction of the slide plate 12, so as to achieve the effect of removing the dust accumulated on the top of the slide plate 12; in addition, the temperature of the hot air has not completely dropped at the first time when it meets the cold cover 11 to form water droplets, so in the case of snow, the water droplets with a certain temperature will play a role in melting the snow, thus preventing the collapse and accumulation caused by snowfall to a certain extent.
[0042] Most of the hot air flowing out from the pipe opening 3 will enter the outer shell 426, at this time the hot air will move upwards along the spiral auger 425, and the spiral auger 425 functions to increase the contact time of the hot air with the thermal energy assembly 423, and the thermal energy assembly 423 is connected with the pipe opening 3, so the heat duration of the pipe opening 3 will be greatly improved.
[0043] When the heat inflow is too much, the heat will accumulate and extrude in the spiral auger 425, and finally the spiral auger 425 will slide and compress along the outside of the trapezoidal seat 424, and the compression form of the spiral auger 425 is from bottom to top, so when the topmost blade of the spiral auger 425 is compressed, it will extrude the cross 427, and the bottom of the cross 427 is connected with the inner slide plate 420, so the inner slide plate 420 and the trapezoidal seat 424 will move upwards together, and when the cross 427 moves into the inner shell 428 and extrudes it, the two sides of the inner shell 428 will move upwards along the outer shell 426 and the middle shell 429 respectively, so the top hole 4201 blocked by the outer shell 426 will be opened, thereby playing a role in allowing heat to flow from the top hole 4201, preventing heat accumulation, and also playing a role in pressure relief of heat.
[0044] At this time, heat will enter into the double-flow pipe 4233 from the conveying pipe 422 inside the sleeve shell 421, and the heat will be divided into two flows flowing inside the double-flow pipe 4233, one part of which will directly flow out from the heat outlet horn 4231, and the other part will enter into the plug shell 2322 and press the friction block 2325 arranged inside the plug shell 2322, at this time, the friction block 2325 will rise and rub against the friction shell 2326, and the outer hole 2323 on the surface of the friction shell 2326 will be opened at this time, and the hot gas will flow out from the double-flow pipe 4233 through the outer hole 2323, wherein the top of the friction block 2325 is provided with a limiting block 2321, which prevents the friction block 2325 from rising to block the interface between the plug shell 2322 and the double-flow pipe 4233. The friction block 2325 is not always in a rising state, but always in an up-and-down floating state, and the bottom of the friction block 2325 is provided with a spring 2324, which maximizes the floating of the friction block 2325, so that the friction block 2325 will rub against the friction shell 2326 continuously, and the high heat generated by the friction of the two will be absorbed by the hot gas, at this time, the heat in the double-flow pipe 4233 will rise to increase the heat preservation time and reduce the heat loss.
[0045] The heat flowing out from the heat outlet horn 4231 will enter into the flow pipe 411, and the blocking plate 413 arranged inside the flow pipe 411 is slidingly installed on the sliding rail 414, and the outer side of the blocking plate 413 is fixedly connected with the push plate 412, at this time, the hot gas will impact the push plate 412, and the push plate 412 will drive the blocking plate 413 to move along the sliding rail 414, and the hole blocked by the sliding rail 414 will be opened, and then a part of the hot gas will enter into another flow pipe 411, at this time, the entering hot gas will impact the originally flowing hot gas, thereby reducing the flow speed of the originally flowing hot gas, and increasing the residence time of the hot gas in the flow pipe 411 to increase the heat increase duration of the pipe port 3.
[0046] Obviously, the embodiments described are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art and related fields without creative labor should belong to the protection scope of the present application. The structures, devices and operation methods not specifically described and explained in the present application, such as without special description and limitation, are implemented according to the conventional means in the art.
Claims
1. A wellhead antifreeze heating system utilizing waste heat from a mine, comprising a debris preventer (1), a heat-insulating shell (2), a pipe nozzle (3) and a return flow device (4), characterized in that: The bottom of the debris preventer (1) is fixedly connected to the return flow device (4), the return flow device (4) is inserted into the side of the pipe opening (3), and the heat-insulating shell (2) is fixedly installed on the outside of the pipe opening (3); The debris preventer (1) comprises a cold cover (11), the outer side of the cold cover (11) is fixedly connected to a slide plate (12), the bottom side of the slide plate (12) is fixedly connected to a cold flow rail (13), the bottom of the cold flow rail (13) is plugged with an outlet pipe (16), the end of the outlet pipe (16) away from the cold flow rail (13) is fixedly connected to a collecting ring (14), the bottom of the collecting ring (14) is fixedly connected to a transition pipe (15), and the end of the transition pipe (15) away from the collecting ring (14) is fixedly connected to the return flow device (4); The return flow device (4) includes a return flow component (41), the return flow component (41) is inserted into the side of the pipe mouth (3), a portion of the return flow component (41) outside the pipe mouth (3) is arranged inside the heat-insulating shell (2), and a heat energy device (42) is fixedly installed inside the pipe mouth (3), and the heat energy device (42) is arranged at the bottom of the return flow component (41); The heat energy device (42) comprises a casing (421), a delivery pipe (422) is plugged into the outer side of the casing (421), and a heat energy component (423) is sleeved on one end of the delivery pipe (422) away from the casing (421); A double flow tube (4233) is provided inside the thermal energy component (423), the double flow tube (4233) is fixedly connected to the delivery tube (422), one end of the double flow tube (4233) away from the delivery tube (422) is fixedly connected to a heat outlet horn (4231), and the middle section of the double flow tube (4233) is fixedly connected to a heating element (4232); The reflux assembly (41) comprises a flow tube (411), a reflux tube (416) is plugged into the outside of the flow tube (411), the flow tube (411) is inserted into the surface of the pipe opening (3), and a slide rail (414) is fixedly connected to the inside of the flow tube (411); A blocking plate (413) is slidably mounted on the inner side of the slide rail (414), a push plate (412) is fixedly connected to the side of the blocking plate (413) away from the flow tube (411), and a limit plate (415) is fixedly connected to the end face of the slide rail (414).
2. The wellhead antifreeze heating system utilizing mine waste heat for heating according to claim 1, characterized in that: The interior of the sleeve (421) is fixedly connected to an outer shell (426), a spiral auger (425) is slidably mounted inside the outer shell (426), and a trapezoidal seat (424) is slidably mounted inside the spiral auger (425).
3. The wellhead antifreeze heating system utilizing mine waste heat for heating according to claim 2, characterized in that: The top of the trapezoidal seat (424) is fixedly connected to a cross (427), the bottom of the cross (427) is fixedly connected to an inner slide (420), the inner slide (420) is slidably connected to the spiral auger (425), and an inner shell (428) is provided on the outer side of the inner slide (420), and the inner side of the inner shell (428) is slidably mounted on the outer side of the outer shell (426).
4. The wellhead antifreeze heating system utilizing mine waste heat for heating according to claim 3, characterized in that: A top hole (4201) is provided on the side of the inner shell (428) that contacts the outer shell (426), a middle shell (429) is slidably mounted on the outer side of the inner shell (428), a side hole (4202) is provided on the lower half of the middle shell (429), and the outer side of the middle shell (429) is fixedly connected to the inner wall of the sleeve shell (421).
5. The wellhead antifreeze heating system utilizing mine waste heat for heating according to claim 1, characterized in that: The heating element (4232) includes an insert shell (2322), the upper and lower ends of which are fixedly connected to the double flow tube (4233), a friction shell (2326) is fixedly installed inside the insert shell (2322), and an outer hole (2323) is opened on the inner side of the friction shell (2326).
6. The wellhead antifreeze heating system utilizing mine waste heat for heating according to claim 5, characterized in that: A friction block (2325) is provided at the central portion of the plug housing (2322), the top end of the friction block (2325) is fixedly connected to the limit block (2321), the bottom end of the friction block (2325) is fixedly connected to a spring (2324), and the bottom end of the spring (2324) is fixedly connected to the double flow tube (4233).
Citation Information
Patent Citations
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