A heating network heater

Abstract

The invention relates to a heat network heater, comprising a shell provided with a plurality of baffles and a first pipe box and a second pipe box sealed and fixed at both ends of the shell, a floating head assembly is provided in the first pipe box, a fixed pipe plate sealed and fixed to the shell is sealed and provided in the second pipe box, the second pipe box is divided into two chambers from top to bottom, the chamber located at the top is connected with a water outlet, the chamber located at the bottom is connected with a water inlet, the upper left corner of the shell is connected with a steam inlet, the lower right corner of the shell is provided with a drainage one-way valve, the floating head assembly is in sealing contact with the first pipe box, a vertical plate is sealed and fixed in the chamber located at the bottom, so that the first pipe box and the second pipe box both form a water leakage space, the baffle is penetrated with a water outlet pipe and a water inlet pipe connected with the floating head assembly, the other end of the water outlet pipe is connected to the chamber located at the top, the water inlet pipe is connected to the chamber located at the bottom, and a transparent water storage cover is fixedly connected to the bottom of the water leakage space; the invention has the advantage of self-closing when a tube bundle ruptures.

Description

Technical Field

[0001] The invention belongs to the technical field of heating network heaters, and in particular relates to a heating network heater. Background Art

[0002] With the increase in the number of newly built power plants and the growing demand for central heating, the application of heat network heaters is becoming more and more extensive. Whether it is the start-up of a cogeneration project in a power plant or a steam heat exchange project in a heating company, heat network heaters are indispensable backbone equipment.

[0003] In the prior art, the water enters the cold water self-heating network heater from the water inlet end and passes through the tube bundle and is discharged from the water outlet end. During the water flow, the water enters the steam self-heating network heater from the upper end and is discharged from the steam self-heating network heater from the lower end after passing through a plurality of baffles cross-arranged vertically. During the steam flow, the water in the tube bundle is heated. However, after long-term use, the tube bundle in the prior art may be broken due to vibration, scouring and other reasons, thereby affecting the normal use of the heat network heater. Summary of the invention

[0004] The object of the present invention is to overcome the deficiencies of the prior art and provide a heating network heater with self-closing function in case of tube bundle rupture.

[0005] The technical solution of the present invention is as follows:

[0006] A heat network heater comprises a shell provided with a plurality of baffles and a first pipe box and a second pipe box sealed and fixed at both ends of the shell, a floating head assembly is provided in the first pipe box, a fixed pipe plate sealed and fixed to the shell is provided in the second pipe box, the second pipe box is divided into two chambers from top to bottom, the chamber located at the top is connected with a water outlet, the chamber located at the bottom is connected with a water inlet, the upper left side of the shell is connected with a steam inlet, the lower right side of the shell is provided with a drainage one-way valve, the floating head assembly is in sealing contact with the first pipe box, a vertical plate is sealed and fixed in the chamber located at the bottom, so that the first pipe box and the second pipe box both form a water leakage space, the baffle is penetrated with a water outlet pipe and a water inlet pipe connected with the floating head assembly, the other end of the water outlet pipe is connected to the chamber located at the top, the water inlet pipe is connected to the chamber located at the bottom, and the bottom of the water leakage space is fixedly connected with a transparent water storage cover;

[0007] A spring check valve is fixed to one end of the water outlet pipe located in the chamber and one end of the water inlet pipe located in the floating head assembly, and a closing device is fixed to one end of the water outlet pipe located in the floating head assembly and one end of the water inlet pipe located in the chamber;

[0008] A sealing plug is fixed to the sealed cavity, and the sealing device seals and passes through the floating head assembly or the vertical plate and is inserted into the sealing plug. When the water inlet pipe or the water outlet pipe is broken, the sealing device gradually closes the water inlet pipe or the water outlet pipe and separates from the sealing plug, so that the water in the sealing device enters the leaking space.

[0009] Further, the closure device includes a valve body threadedly sealed and connected to the floating head assembly or the fixed tube sheet, a connecting tube fixed to the valve body at one end of the shell, and a water inlet control assembly arranged at the other end of the valve body, wherein a driving assembly is arranged in the valve body, and the driving assembly realizes water inlet control of the water inlet control assembly according to the pressure difference between the water inlet pipe or the water outlet pipe and the shell;

[0010] The water inlet control assembly is provided with a water leakage drain cylinder which is sealed and plugged with the sealing plug, and the water leakage drain cylinder is connected to the water inlet control assembly and can be displaced along with the closed state of the water inlet control assembly, so that when the water inlet control assembly is in the closed state, the water in the valve body is discharged into the water leakage space;

[0011] The connecting tube is connected to the driving component and the water inlet pipe or the water outlet pipe, and the connecting tube is connected to the valve body.

[0012] Furthermore, the water inlet control assembly includes an outer cylinder fixed on the valve body, a displacement cylinder sealably inserted in the outer cylinder, a sealing ring plate fixed on the outer cylinder, and a contact sealing ring capable of sealingly fitting with the sealing ring plate, the water leakage drainage cylinder is sealably fixed on the contact sealing ring, and the contact sealing ring is connected with a connecting rod;

[0013] The connecting rod is fixed with a displacement ring, the displacement cylinder has two first displacement grooves mirror-imaged with the axis as the center, and the displacement ring is provided with a convex point located in the first displacement groove;

[0014] The displacement cylinder and the outer cylinder are both provided with a first hole and a second hole which are staggered with each other, the outer cylinder is provided with two second displacement grooves which are mirror-imaged with the axis as the center, and the displacement cylinder is provided with a convex point which is located in the second displacement groove;

[0015] The driving assembly is plugged into the displacement cylinder and can drive the displacement cylinder to rotate. When the displacement cylinder rotates, it moves along the second displacement groove to push the first hole to overlap with the second hole, and makes the displacement ring move along the first displacement groove and push the contact sealing ring to separate from the outer cylinder.

[0016] Furthermore, the contact sealing ring and the sealing ring plate are both provided with convex rings and annular grooves which are plugged into each other.

[0017] Furthermore, the connecting rod is penetrated by a guide cylinder, and the guide cylinder is fixed with a supporting foot that is displaced along the axial direction of the outer cylinder.

[0018] Further, the driving assembly includes a rotating ring rotatably connected to the inner wall of the valve body, at least two blades fixed on the rotating ring, a rotating groove provided in the inner wall of the valve body, and at least two contact plates fixed in the rotating groove, the number of the blades is the same as the number of the contact plates, the contact plate is in contact and seal with the rotating ring to divide the rotating groove into at least two grooves, and the rotating ring is connected to a torsion spring fixed in the valve body;

[0019] The contact plate is provided with two water holes and steam holes connected with the connecting tube. The water holes and steam holes are both connected with the side of the contact plate located at the rotating groove and the connected sides are opposite. The water hole is located on the same side of the contact plate.

[0020] Furthermore, a plurality of water pressure channels and steam channels connected to the connecting tube are provided in the valve body, the water pressure channel is connected to a water ring groove connected to the water hole, and the steam channel is connected to a steam ring groove connected to the steam hole.

[0021] Furthermore, the valve body is provided with a plurality of expansion grooves in the radial direction, a return spring is fixed in the expansion groove, a displacement piston sealably plugged in the expansion groove is fixed to the return spring, a plug-in block is fixed to the end of the displacement piston away from the return spring, the floating head assembly and the fixed tube plate are provided with annular limiting grooves for plugging the plug-in block, and the valve body is provided with a flow ring groove, which connects the steam channel and the expansion groove.

[0022] Furthermore, a steam groove and a water groove are provided on the inner wall of the connecting tube, and the steam groove and the water groove are respectively connected to the shell and the water inlet pipe or the water outlet pipe.

[0023] Furthermore, the floating head assembly includes a hook ring located in the first pipe box, a flange located on one side of the hook ring, a fixed plate sealed between the hook ring and the flange, and a floating head fixed and sealed on the flange, the valve body threaded seal is connected to the fixed plate, the annular limit groove is opened on the fixed plate, and the leaking drainage tube seal passes through the floating head.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The present invention uses a drainage check valve and a spring check valve to make the pressure inside the housing, the water inlet pipe, and the water outlet pipe adjustable, and uses a closing device to detect the rupture of the water inlet pipe and the water outlet pipe based on the pressure change between the housing and the water inlet pipe or the water outlet pipe, and closes the water inlet pipe or the water outlet pipe according to the pressure change, so that the other water inlet pipes or the water outlet pipes can be used normally;

[0026] 2. The present invention collects the water inside the broken pipe through the leaking space and the transparent water storage cover, which is convenient for reminding people that the pipe is damaged.

[0027] In summary, the present invention has the advantage of self-closing when the tube bundle ruptures. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 For the present invention Figure 1 A schematic diagram of the structure of the enlarged portion A;

[0030] Figure 3 For the present invention Figure 1 A schematic diagram of the structure of the closure device;

[0031] Figure 4 For the present invention Figure 3 A schematic diagram of a cross-sectional structure of a plug-in block;

[0032] Figure 5 For the present invention Figure 3 A schematic diagram of the cross-sectional structure of a connecting tube;

[0033] Figure 6 For the present invention Figure 3 A schematic diagram of the structure of the drive assembly;

[0034] Figure 7 For the present invention Figure 2 Schematic diagram of the cross-sectional structure of the outer cylinder.

[0035] In the figure, 1, floating head, 2, sealing plug, 3, closing device, 31, leaking drainage cylinder, 32, connecting cylinder, 321, steam groove, 322, water groove, 33, water pressure channel, 34, valve body, 341, reset spring, 342, displacement piston, 343, plug-in block, 344, rotating groove, 35, steam ring groove, 36, contact plate, 361, water hole, 362, steam hole, 37, displacement cylinder, 371, rotating ring, 372, fan blade, 38, outer cylinder, 381, second displacement groove, 382, ​​second hole, 39, connecting rod, 30, guide cylinder, 301, sealing ring plate, 302. Contact sealing ring; 303. Support foot; 304. First displacement groove; 305. Displacement ring; 306. First hole; 307. Water ring groove; 308. Flow ring groove; 309. Steam channel; 4. Flange; 5. Hook ring; 6. Water outlet pipe; 7. Steam inlet; 8. Fixed tube sheet; 9. Water outlet; 10. Spring check valve; 11. Sealing fitting ring; 12. Partition plate; 13. Water inlet; 14. Shell; 15. Baffle; 16. Water inlet pipe; 17. Drainage check valve; 18. Transparent water storage cover; 19. First pipe box; 20. Vertical plate; 21. Second pipe box. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1-7 As shown, a heat network heater comprises a shell 14 provided with a plurality of baffles 15 and a first pipe box 19 and a second pipe box 21 sealed and fixed at both ends of the shell 14. The plurality of baffles 15 are distributed up and down and staggered to ensure heating. A floating head assembly is arranged in the first pipe box 19. The second pipe box 21 is sealed with a fixed tube sheet 8 sealed and fixed to the shell 14. The fixed tube sheet 8 is sealed and fixed with a partition plate 12 sealed and fixed to the second pipe box 21. The partition plate 12 is sealed and fixed with a sealing fitting ring 11 in contact and sealed with the second pipe box 21, so as to separate the second pipe box 21 into two chambers up and down, located at The upper chamber is connected with a water outlet 9, the lower chamber is connected with a water inlet 13, the upper left side of the shell 14 is connected with a steam inlet 7, the lower right side of the shell 14 is provided with a drainage check valve 17, the floating head assembly is in sealing contact with the first pipe box 19, and a vertical plate 20 is sealed and fixed in the lower chamber, so that the first pipe box 19 and the second pipe box 21 both form a water leakage space, the baffle 15 is penetrated with a water outlet pipe 6 and a water inlet pipe 16 connected with the floating head assembly, the other end of the water outlet pipe 6 is connected with the upper chamber, the water inlet pipe 16 is connected with the lower chamber, and the bottom of the water leakage space is fixedly connected with a transparent water storage cover 18;

[0038] A spring check valve 10 is fixed to one end of the water outlet pipe 6 located in the chamber and one end of the water inlet pipe 16 located in the floating head assembly, and a closing device 3 is fixed to one end of the water outlet pipe 6 located in the floating head assembly and one end of the water inlet pipe 16 located in the chamber;

[0039] The sealing cavity is fixed with a sealing plug 2, and the closing device 3 seals and passes through the floating head assembly or the vertical plate and is plugged into the sealing plug 2. When the water inlet pipe 16 or the water outlet pipe 6 is broken, the closing device 3 gradually closes the water inlet pipe 16 or the water outlet pipe 6 and separates from the sealing plug 2, so that the water in the closing device 3 enters the leaking space;

[0040] When in use, cold water enters from the water inlet 13 and passes through the water inlet pipe 16 and the water outlet pipe 6 before being discharged from the water outlet 9. Steam enters the shell 14 through the steam inlet 7 and passes through the baffle 15 before being discharged from the water discharge check valve 17. In the process of the cold water flowing, hot water is gradually formed. The water discharge check valve 17 and the spring check valve 10 are arranged so that the pressure of the water inlet pipe 16, the water discharge pipe and the shell 14 can be controlled.

[0041] When a water inlet pipe 16 or a water outlet pipe 6 is broken, the water in the pipe is discharged from the broken position, so that the spring check valve 10 is gradually closed, and the pressure in the corresponding water inlet pipe 16 or the water outlet pipe 6 is reduced. At this time, the closing device 3 gradually closes the other end of the water inlet pipe 16 and the water outlet pipe 6 and drives the closing device 3 to gradually separate from the sealing plug 2, so that the water in the water inlet pipe 16 or the water outlet pipe 6 enters the leaking space and enters the transparent water storage cover 18. When the personnel find that there is water in the transparent water storage cover 18, they can choose the maintenance time according to the actual situation for maintenance;

[0042] Preferably, the end of the sealing head inserted into the sealing device 3 does not completely separate from the sealing plug 2 and the top of the end located in the sealing component reserves a plane for the pipeline water to flow out, so as to avoid excessive discharge of water in the pipeline;

[0043] Preferably, the sealing plug 2 is made of elastic material so that the sealing assembly can be ensured to be closed when the floating head assembly floats.

[0044] In this embodiment, the closing device 3 includes a valve body 34 threadedly sealed and connected to the floating head assembly or the fixed tube sheet 8, a connecting tube 32 fixed to the valve body 34 at one end of the shell 14, and a water inlet control assembly arranged at the other end of the valve body 34. A driving assembly is arranged in the valve body 34, and the driving assembly realizes the water inlet control of the water inlet control assembly according to the pressure difference between the water inlet pipe 16 or the water outlet pipe 6 and the shell 14;

[0045] The water inlet control assembly is provided with a water leakage drain cylinder 31 which is sealed and plugged with the sealing plug 2. The water leakage drain cylinder 31 is connected to the water inlet control assembly and can be displaced along with the closed state of the water inlet control assembly, so that when the water inlet control assembly is in the closed state, the water in the valve body 34 is discharged into the water leakage space;

[0046] The connecting tube 32 is connected to the driving assembly and the water inlet pipe 16 or the water outlet pipe 6, and the connecting tube 32 is connected to the valve body 34;

[0047] When in normal use, the pressure in the housing 14 and the pressure in the water inlet pipe 16 or the water outlet pipe 6 enter the drive assembly through the connecting tube 32, so that the drive assembly drives the water inlet control assembly to be in the open state, and water can enter the water inlet pipe 16 or the water outlet pipe 6;

[0048] When the pipeline is damaged, the water in the pipeline flows into the housing 14, and the pressure in the water inlet pipe 16 or the water outlet pipe 6 decreases. At this time, the driving component drives the water inlet control and components to gradually close, and the water inlet control and components drive the leakage drainage cylinder 31 to move to the connected leakage space, and discharge the water in the water inlet pipe 16 or the water outlet pipe 6 into the leakage space;

[0049] In order to ensure that the water in the water inlet pipe 16 or the water outlet pipe 6 can enter the housing 14 when it breaks, the pressure in the water inlet pipe 16 or the water outlet pipe 6 is greater than the pressure of the housing 14;

[0050] At the same time, the water inlet control component is in an open state when water is just starting to flow, and water can be injected into the water inlet pipe 16 or the water outlet pipe 6 and then heated.

[0051] In this embodiment, the water inlet control assembly includes an outer cylinder 38 fixed on the valve body 34, a displacement cylinder 37 sealed and inserted in the outer cylinder 38, a sealing ring plate 301 fixed on the outer cylinder 38, and a contact sealing ring 302 capable of sealingly fitting with the sealing ring plate 301, the water leakage drainage cylinder 31 is sealed and fixed on the contact sealing ring 302, and the contact sealing ring 302 is connected with a connecting rod 39;

[0052] The connecting rod 39 is fixed with a displacement ring 305. Two first displacement grooves 304 are mirror-imaged with the axis as the center in the displacement cylinder 37. The displacement ring 305 is provided with a convex point located in the first displacement groove 304.

[0053] The displacement cylinder 37 and the outer cylinder 38 are both provided with a first hole 306 and a second hole 382 which are staggered with each other. Two second displacement grooves 381 are mirror-imaged with the axis as the center in the outer cylinder 38. The displacement cylinder 37 is provided with a convex point located in the second displacement groove 381.

[0054] The driving assembly is plugged into the displacement cylinder 37 and can drive the displacement cylinder 37 to rotate. When the displacement cylinder 37 rotates, it moves along the second displacement groove 381 to push the first hole 306 to coincide with the second hole 382, ​​and makes the displacement ring 305 move along the first displacement groove 304 and push the contact sealing ring 302 to separate from the outer cylinder 38;

[0055] When in use, the driving component drives the displacement cylinder 37 based on the pressure in the shell 14 and the pressure in the water inlet pipe 16 or the water outlet pipe 6. When the water inlet pipe 16 or the water outlet pipe 6 is not broken, the driving component drives the displacement cylinder 37 to rotate. When the displacement cylinder 37 rotates, it moves along the outer cylinder 38, and the displacement ring 305 moves along the first displacement groove 304, so that the first hole 306 overlaps with the second hole 382 and pushes the contact sealing ring 302 to move out of the outer cylinder 38. At this time, the water flow enters the water inlet pipe 16 or the water outlet pipe 6 normally. When the water inlet pipe 16 or the water outlet pipe 6 is broken, the driving component drives the displacement cylinder 37 to reverse and makes the contact sealing ring 302 enter the outer cylinder 38 and contact and seal with the sealing ring plate 301, and the first hole 306 and the second hole 382 no longer overlap. At this time, the water inlet pipe 16 or the water outlet pipe 6 is closed, so that the broken pipe cannot enter water, thereby ensuring the normal use of the heater.

[0056] In this embodiment, the contact sealing ring 302 and the sealing ring plate 301 are both provided with convex rings and annular grooves that are plugged into each other;

[0057] When in use, the contact area is increased by the convex ring and the annular groove to ensure sealing.

[0058] In this embodiment, the connecting rod 39 is penetrated by a guide cylinder 30 , and the guide cylinder 30 is fixed with a supporting foot 303 that is displaced axially along the outer cylinder 38 .

[0059] When in use, the guide tube 30 and the support foot 303 cooperate to achieve displacement guidance of the connecting rod 39 to ensure use.

[0060] In this embodiment, the driving assembly includes a rotating ring 371 rotatably connected to the inner wall of the valve body 34, at least two blades 372 fixed on the rotating ring 371, a rotating groove 344 provided on the inner wall of the valve body 34, and at least two contact plates 36 fixed in the rotating groove 344. The number of the blades 372 is the same as that of the contact plates 36. The contact plates 36 are in contact and sealed with the rotating ring 371 to divide the rotating groove 344 into at least two grooves. The rotating ring 371 is connected to a torsion spring fixed in the valve body 34.

[0061] The contact plate 36 is provided with two water holes 361 and steam holes 362 which are in communication with the connecting tube 32. The water holes 361 and steam holes 362 are both in communication with the side of the contact plate 36 located at the rotating groove 344 and the communicating sides are opposite. The water hole 361 is located at the same side of the contact plate 36 (the clockwise or counterclockwise side).

[0062] In the initial state, the torsion spring drives the rotating ring 371 to rotate the fan blade 372, which is about to contact the contact plate 36, and there is only a small gap between the first hole 306 and the second hole 382, ​​and the contact sealing ring 302 is about to enter the outer cylinder 38. At this time, only a small amount of water can enter. After the water gradually enters, the pressure in the water inlet pipe 16 or the water outlet pipe 6 gradually increases. At this time, the water gradually enters the water hole 361 and pushes the fan blade 372 to rotate gradually. The fan blade 372 drives the rotating ring 371 to rotate, and the rotating ring 371 drives the displacement cylinder 37 to rotate, so that the overlapping area of ​​the first hole 306 and the second hole 382 increases, and the contact sealing ring 302 gradually moves away from the cylinder until the first hole 306 and the second hole 382 completely overlap, and the fan blade 372 contacts the other contact plate 36.

[0063] When the water inlet pipe 16 or the water outlet pipe 6 is broken, the pressure in the water inlet pipe 16 or the water outlet pipe 6 is reduced, so that the fan blade 372 gradually rotates, and under the action of the pressure in the housing 14 and the torsion spring, the fan blade 372 is reversed to contact the contact plate 36. At this time, the first hole 306 and the second hole 382 are completely closed, thereby ensuring that the water inlet pipe 16 or the water outlet pipe 6 is automatically closed when it is broken, ensuring the normal use of the heater;

[0064] As an alternative solution, the fan blade 372 can be allowed to contact the contact plate 36 in the initial state. At this time, the first hole 306 and the second hole 382 no longer overlap, and the contact sealing ring 302 is also in contact with the sealing ring plate 301. When it is needed, air is extracted at the drain check valve 17 to create a negative pressure in the shell 14. At this time, the steam hole 362 absorbs the air in the rotating groove 344, causing the fan blade 372 to rotate and drive the displacement cylinder 37 to move through the rotating ring 371 until the first hole 306 and the second hole 382 overlap, and the contact sealing ring 302 is separated from the outer cylinder 38.

[0065] In this embodiment, a plurality of water pressure channels 33 and steam channels 309 are provided in the valve body 34 and are connected to the connecting tube 32. The water pressure channel 33 is connected to the water ring groove 307 connected to the water hole 361, and the steam channel 309 is connected to the steam ring groove 35 connected to the steam hole 362.

[0066] When in use, the connecting tube 32 is connected to the water hole 361 through the water ring groove 307 and the water pressure channel 33, and is connected to the steam hole 362 through the steam channel 309 and the steam ring groove 35, thereby ensuring the connection.

[0067] In this embodiment, the valve body 34 is provided with a plurality of telescopic grooves in the radial direction, a return spring 341 is fixed in the telescopic groove, a displacement piston 342 sealed and plugged in the telescopic groove is fixed to the return spring 341, a plug-in block 343 is fixed to the end of the displacement piston 342 away from the return spring 341, the floating head assembly and the fixed tube sheet 8 are provided with an annular limiting groove for the plug-in block 343 to be plugged, and the valve body 34 is provided with a flow annular groove 308, which is connected to the steam channel 309 and the telescopic groove;

[0068] When in use, the airflow in the shell 14 enters the telescopic groove through the steam channel 309 and the flow annular groove 308, and pushes the displacement piston 342 to move, so that the plug-in block 343 is inserted into the annular limiting groove, so that the valve body 34 is displaced and limited, and the valve body 34 is fixed. When the first pipe box 19 and the second pipe box 21 are opened, the shell 14 returns to normal pressure. At this time, the spring drives the displacement piston 342 and the plug-in block 343 to reset, and the plug-in block 343 is separated from the annular limiting groove;

[0069] As an alternative solution, the flow ring groove 308 is connected to the water pressure channel 33, and is normally connected when the water inlet pipe 16 or the water outlet pipe 6 is in normal use. When the water inlet pipe 16 or the water outlet pipe 6 is broken, due to the decrease in water pressure, the spring drives the plug block 343 to reset, so that the water inlet pipe 16 or the water outlet pipe 6 is normally connected;

[0070] When in use, the plug-in block 343 is pushed into the annular limiting groove by water pressure. When water is no longer supplied, the sealing assembly is automatically closed, and the spring drives the plug-in block 343 to return to the original position and disengage from the annular limiting groove.

[0071] In this embodiment, a steam groove 321 and a water groove 322 are formed on the inner wall of the connecting tube 32. The steam groove 321 and the water groove 322 are connected to the housing 14 and the water inlet pipe 16 or the water outlet pipe 6 respectively.

[0072] When in use, the water pressure channel 33 and the steam channel 309 are connected through the steam tank 321 and the water tank 322 to ensure connectivity;

[0073] In this embodiment, the floating head assembly includes a hook ring 5 located in the first pipe box 19, a flange 4 located on one side of the hook ring 5, a fixing plate sealed and fixed between the hook ring 5 and the flange 4, and a floating head 1 fixed and sealed on the flange 4, a valve body 34 is threadedly sealed and connected to the fixing plate, an annular limit groove is provided on the fixing plate, and a leaking drainage tube 31 is sealed and passes through the floating head 1;

[0074] When in use, the water inlet pipe 16 is connected to the water outlet pipe 6 through the chamber composed of the floating head 1, the fixing plate, the hook ring 5 and the flange 4, which ensures the connection and can move according to the displacement caused by thermal expansion, thereby ensuring use.

[0075] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating network heater, comprising a shell provided with a plurality of baffles, and a first pipe box and a second pipe box sealed and fixed at both ends of the shell, a floating head assembly is provided in the first pipe box, a fixed pipe sheet sealed and fixed to the shell is provided in the second pipe box, the second pipe box is divided into two chambers from top to bottom, the upper chamber is connected to a water outlet, the lower chamber is connected to a water inlet, the upper left side of the shell is connected to a steam inlet, and the lower right side of the shell is provided with a drainage check valve, characterized in that: The floating head assembly is in sealing contact with the first pipe box, and a vertical plate is sealed and fixed in the chamber below, so that the first pipe box and the second pipe box both form a water leakage space. The baffle is penetrated by a water outlet pipe and a water inlet pipe connected to the floating head assembly. The other end of the water outlet pipe is connected to the chamber above, and the water inlet pipe is connected to the chamber below. The bottom of the water leakage space is fixedly connected to a transparent water storage cover; A spring check valve is fixed to one end of the water outlet pipe located in the chamber and one end of the water inlet pipe located in the floating head assembly, and a closing device is fixed to one end of the water outlet pipe located in the floating head assembly and one end of the water inlet pipe located in the chamber; A sealing plug is fixed to the sealed cavity, and the sealing device seals and passes through the floating head assembly or the vertical plate and is inserted into the sealing plug. When the water inlet pipe or the water outlet pipe is broken, the sealing device gradually closes the water inlet pipe or the water outlet pipe and separates from the sealing plug, so that the water in the sealing device enters the leaking space.

2. A heating network heater according to claim 1, characterized in that: The closure device comprises a valve body threadedly connected to a floating head assembly or a fixed tube sheet, a connecting tube fixed to the valve body at one end of the shell, and a water inlet control assembly arranged at the other end of the valve body. A driving assembly is arranged in the valve body, and the driving assembly realizes water inlet control of the water inlet control assembly according to the pressure difference between the water inlet pipe or the water outlet pipe and the shell; The water inlet control assembly is provided with a water leakage drain cylinder which is sealed and plugged with the sealing plug, and the water leakage drain cylinder is connected to the water inlet control assembly and can be displaced along with the closed state of the water inlet control assembly, so that when the water inlet control assembly is in the closed state, the water in the valve body is discharged into the water leakage space; The connecting tube is connected to the driving component and the water inlet pipe or the water outlet pipe, and the connecting tube is connected to the valve body.

3. A heating network heater according to claim 2, characterized in that: The water inlet control assembly comprises an outer cylinder fixed on the valve body, a displacement cylinder sealed and inserted in the outer cylinder, a sealing ring plate fixed on the outer cylinder and a contact sealing ring capable of sealingly fitting with the sealing ring plate, the water leakage drainage cylinder is sealed and fixed on the contact sealing ring, and the contact sealing ring is connected with a connecting rod; The connecting rod is fixed with a displacement ring, the displacement cylinder has two first displacement grooves mirror-imaged with the axis as the center, and the displacement ring is provided with a convex point located in the first displacement groove; The displacement cylinder and the outer cylinder are both provided with a first hole and a second hole which are staggered with each other, the outer cylinder is provided with two second displacement grooves which are mirror-imaged with the axis as the center, and the displacement cylinder is provided with a convex point which is located in the second displacement groove; The driving assembly is plugged into the displacement cylinder and can drive the displacement cylinder to rotate. When the displacement cylinder rotates, it moves along the second displacement groove to push the first hole to overlap with the second hole, and makes the displacement ring move along the first displacement groove and push the contact sealing ring to separate from the outer cylinder.

4. A heating network heater according to claim 3, characterized in that: The contact sealing ring and the sealing ring plate are both provided with convex rings and annular grooves which are plugged into each other.

5. A heating network heater according to claim 4, characterized in that: The connecting rod is penetrated by a guide cylinder, and the guide cylinder is fixed with a supporting foot which is displaced along the axial direction of the outer cylinder.

6. A heating network heater according to claim 5, characterized in that: The driving assembly includes a rotating ring rotatably connected to the inner wall of the valve body, at least two blades fixed on the rotating ring, a rotating groove provided in the inner wall of the valve body, and at least two contact plates fixed in the rotating groove, the number of the blades is the same as the number of the contact plates, the contact plates are in contact and sealed with the rotating ring to divide the rotating groove into at least two grooves, and the rotating ring is connected to a torsion spring fixed in the valve body; The contact plate is provided with two water holes and steam holes connected with the connecting tube. The water holes and steam holes are both connected with the side of the contact plate located at the rotating groove and the connected sides are opposite. The water hole is located on the same side of the contact plate.

7. A heating network heater according to claim 6, characterized in that: The valve body is provided with a plurality of water pressure channels and steam channels connected with the connecting tube. The water pressure channel is connected with a water ring groove connected with the water hole, and the steam channel is connected with a steam ring groove connected with the steam hole.

8. A heating network heater according to claim 7, characterized in that: The valve body is provided with a plurality of expansion grooves in the radial direction, a return spring is fixed in the expansion groove, a displacement piston sealably plugged in the expansion groove is fixed to the return spring, a plug-in block is fixed to the end of the displacement piston away from the return spring, the floating head assembly and the fixed tube plate are provided with an annular limiting groove for plugging the plug-in block, the valve body is provided with a flow ring groove, and the flow ring groove connects the steam channel and the expansion groove.

9. A heating network heater according to claim 8, characterized in that: The inner wall of the connecting tube is provided with a steam groove and a water groove, and the steam groove and the water groove are respectively connected to the shell and the water inlet pipe or the water outlet pipe.

10. A heating network heater according to claim 9, characterized in that: The floating head assembly includes a hook ring located in the first pipe box, a flange located on one side of the hook ring, a fixed plate sealed between the hook ring and the flange, and a floating head fixed and sealed on the flange. The valve body is threaded and sealed on the fixed plate, the annular limit groove is opened on the fixed plate, and the leaking drainage tube seal passes through the floating head.

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