Water cooling for combustion equipment

Abstract

The present invention relates to a water cooling device for combustion equipment, comprising an end cover and an outer tube, a water riser, and an inner tube which are arranged in sequence from outside to inside, one end of the outer tube and one end of the inner tube are connected to the end cover, a first water flow channel is formed between the inner tube and the water riser, a second water flow channel is formed between the water riser and the outer tube, a water separation component is provided between the outer tube and the inner tube near the end cover, a flow guide is provided between the water separation component and the end cover, the first water flow channel and the second water flow channel are connected through the flow guide, the water separation component comprises a first water separation component and a second water separation component, the first water separation component is connected to one end of the water riser, the second water separation component is connected to the flow guide, a sealing component is provided between the first water separation component and the second water separation component; an elastic component is also connected between the first water separation component and the second water separation component. The present invention can solve the problem of stress concentration or even damage of the end cover caused by thermal expansion of the pipe fittings, and can keep the water flow velocity stable without increasing the equipment operation consumption.

Description

Technical Field

[0001] The invention relates to the technical field of combustion equipment cooling, and in particular to a water cooling device for combustion equipment. Background Art

[0002] At present, in the field of high-temperature and high-pressure coal gasification, the coal gasification device generally has the phenomenon of local damage to the heating surface of the burner front cover during operation, which seriously affects the safe, stable and long-term operation of the coal gasification device. The burner water cooling device is usually composed of several water jacket devices connected by flanges. Its structure generally includes a front cover and a water separation component. There is a certain distance between the front cover and the water separation component, so that water flows through this part to cool the front cover. In order to enhance the heat exchange effect of the front cover, a guide piece is usually processed on the front cover to enhance the convective heat exchange between water and the front cover, reduce the temperature of the front cover, and increase the life of the front cover. However, due to the different thermal expansion lengths of different cooling water pipes in the water cooling device, it is easy for the water separation component to squeeze the front cover, resulting in stress concentration on the front cover and damage, causing bulging and cracks on the burner front cover. To prevent damage to the front cover, a certain distance is usually pre-designed between the water separation component and the guide component of the front cover. However, in actual operation, since the guide component is separated from the water separation component by a certain distance, under the condition of the same water volume, the water flow area increases, the flow rate decreases, and the heat exchange effect becomes worse compared with no separation distance. In order to ensure the water flow rate, the water volume needs to be increased, which will cause the water flow rate and flow resistance to increase, and increase the pump consumption. Summary of the invention

[0003] In view of the above problems existing in the prior art, the object of the present invention is to provide a water cooling device for combustion equipment, which can solve the problem of stress concentration or even damage of the end cover caused by thermal expansion of the pipe, and can maintain a stable water flow rate without increasing the equipment operation consumption.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a water cooling device for combustion equipment, comprising an end cover and an outer tube, a water riser, and an inner tube arranged in sequence from the outside to the inside, one end of the outer tube and one end of the inner tube are connected to the end cover, a first water flow channel is formed between the inner tube and the water riser, and a second water flow channel is formed between the water riser and the outer tube. A water separation component is provided between the outer tube and the inner tube near the end cover, a guide member is provided between the water separation component and the end cover, the first water flow channel and the second water flow channel are connected through the guide member, the water separation component comprises a first water separation member and a second water separation member, the first water separation member is connected to one end of the water riser, the second water separation member is connected to the guide member, a sealing member is provided between the first water separation member and the second water separation member to seal the gap between the two; an elastic member is also connected between the first water separation member and the second water separation member, and the expansion and contraction direction of the elastic member is the same as the length direction of the water riser.

[0005] In some embodiments, the end cap is an annular structure, the inner ring edge of the end cap is sealed to the one end of the inner tube, and the outer ring edge of the end cap is sealed to the one end of the outer tube.

[0006] In some embodiments, the other end of the watertight pipe is sealed to the outer pipe via a water sealing ring. The water sealing ring is an annular structure. The inner ring edge of the water sealing ring is sealed to the other end of the watertight pipe, and the outer ring edge of the water sealing ring is sealed to the inner wall of the outer pipe.

[0007] In some embodiments, the first water separator is sealingly connected to the one end of the watertight pipe.

[0008] In some embodiments, one end of the guide member is in contact with and connected to the second water separation member, and the other end of the guide member is in contact with and connected to the end cover; or,

[0009] One end of the flow guide is fixedly connected to the second water separation element, and the other end of the flow guide is in contact with the end cover; or,

[0010] One end of the flow guide is in contact with and connected to the second water separation member, and the other end of the flow guide is fixedly connected to the end cover.

[0011] In some embodiments, when one end of the flow guide is fixedly connected to the second water separator, the flow guide and the second water separator are welded together, or the flow guide and the second water separator are an integrated structure;

[0012] When the other end of the flow guide is fixedly connected to the end cover, the flow guide and the end cover are welded together, or the flow guide and the end cover are an integrated structure.

[0013] In some embodiments, a groove for installing the sealing element is provided on the first water separating element or the second water separating element.

[0014] In some embodiments, the sealing member is an O-ring, and the O-ring is installed in the annular gap formed between the first water separator and the second water separator.

[0015] In some embodiments, the elastic member is a spring or an expansion joint.

[0016] In some embodiments, the guide member is one of a straight rib type guide member, an involute rib type guide member, a cylindrical spoiler type guide member, a single helix type guide member, a double helix type guide member and a quad helix type guide member.

[0017] Compared with the prior art, the water cooling device for combustion equipment provided in the embodiment of the present invention is provided with a separate first water separator and a second water separator, and the first water separator and the second water separator are respectively connected to the watertight pipe and the guide member, and the gap between the first water separator and the second water separator is sealed by a sealing member, so as to ensure that water flows through the guide member to cool the end cover, thereby ensuring the safe operation of the end cover in a high temperature environment; at the same time, when the watertight pipe expands due to heat and drives the first water separator to move toward the end cover, it will not drive the second water separator to squeeze the end cover, thereby reducing the damage caused by stress concentration on the end cover and extending the service life of the end cover; the first water separator and the second water separator are connected along the length direction of the watertight pipe by an elastic member, and the elastic member can absorb thermal expansion and contraction, so that the second water separator and the guide member are always in close contact, thereby ensuring that the water flow velocity inside the guide member is stable, thereby ensuring the stability of the heat exchange effect, and will not increase the consumption of equipment operation, thereby providing a strong guarantee for the safe, stable and long-term operation of the combustion equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0019] Figure 1A cross-sectional view of a water cooling device for combustion equipment according to an embodiment of the present invention;

[0020] Figure 2 sectional view of a water cooling component of a water cooling device for a combustion device according to an embodiment of the present invention ( Figure 1 The circled part);

[0021] Figure 3 Another structural cross-sectional view of a water cooling component of a water cooling device for combustion equipment according to an embodiment of the present invention;

[0022] Figure 4 It is another structural cross-sectional view of the water cooling component of the water cooling device for combustion equipment according to an embodiment of the present invention;

[0023] Figure 5 It is another structural cross-sectional view of the water cooling component of the water cooling device for combustion equipment according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of a guide member for a water cooling device of a combustion equipment according to an embodiment of the present invention. In the figure, (a) to (f) are respectively a straight rib type guide member (a), an involute rib type guide member (b), a cylindrical spoiler type guide member (c), a single spiral type guide member (d), a double spiral type guide member (e) and a quadruple spiral type guide member (f).

[0025] Reference numerals:

[0026] 1-end cover; 101-first water flow channel, 102-second water flow channel; 2-outer tube, 201-first water inlet and outlet, 202-second water inlet and outlet; 3-waterproof pipe; 4-inner tube; 5-water separation component, 51-first water separation component, 511-first connecting part, 512-second connecting part, 52-second water separation component, 521-third connecting part, 522-fourth connecting part, 53-sealing part, 54-elastic part, 55-groove; 6-flow guide; 7-water sealing ring; 8-three-pronged pipe; 91-jointing flange, 92-mounting flange. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0030] Figures 1 to 5 Schematic diagram of the structure of the water cooling device for combustion equipment according to an embodiment of the present invention (the direction of the arrow is the direction of water flow). Figures 1 to 5 As shown, an embodiment of the present invention provides a water cooling device for combustion equipment, including an end cover 1 and an outer tube 2, a water riser 3, and an inner tube 4 which are arranged in sequence from the outside to the inside, one end of the outer tube 2 and one end of the inner tube 4 are connected to the end cover 1, a first water flow channel 101 is formed between the inner tube 4 and the water riser 3, a second water flow channel 102 is formed between the water riser 3 and the outer tube 2, a water separation component 5 is provided between the outer tube 2 and the inner tube 4 near the end cover 1, a flow guide 6 is provided between the water separation component 5 and the end cover 1, and the first water flow channel 101 is connected to the second water flow channel 102 through the guide member 6, the water separation component 5 includes a first water separation member 51 and a second water separation member 52, the first water separation member 51 is connected to one end of the watertight pipe 3, the second water separation member 52 is connected to the guide member 6, a sealing member 53 is provided between the first water separation member 51 and the second water separation member 52 to seal the gap therebetween; an elastic member 54 is also connected between the first water separation member 51 and the second water separation member 52, and the expansion and contraction direction of the elastic member 54 is the same as the length direction of the watertight pipe 3.

[0031] The water cooling device for combustion equipment provided in the embodiment of the present invention is provided with a first water separator 51 and a second water separator 52 which are separated. The first water separator 51 and the second water separator 52 are respectively connected to the watertight pipe 3 and the guide member 6, and the gap between the first water separator 51 and the second water separator 52 is sealed by a sealing member 53, so that water can flow through the guide member 6 to cool the end cover 1, thereby ensuring the safe operation of the end cover 1 in a high temperature environment. At the same time, when the watertight pipe 3 is heated and expanded to drive the first water separator 51 to move toward the end cover 1, the second water separator 51 will not be driven to move. The separation member 52 squeezes the end cover 1, reducing damage caused by stress concentration on the end cover 1 and extending the service life of the end cover 1; the first water separation member 51 and the second water separation member 52 are connected along the length direction of the watertight pipe 3 through the elastic member 54. When the watertight pipe 3 expands due to heat and drives the first water separation member 51 to move toward the end cover 1, the elastic member 54 can absorb the thermal expansion and contraction, so that the second water separation member 52 is always in close contact with the guide member 6, ensuring the stability of the water flow velocity inside the guide member, thereby ensuring the stability of the heat exchange effect, and providing a strong guarantee for the safe, stable and long-term operation of the combustion equipment.

[0032] Specifically, Figure 1 As shown, the water cooling device as a whole is a sleeve-type structure, with the outer tube 2, the water-rising tube 3, and the inner tube 4 coaxially arranged at intervals, that is, the diameters of the outer tube 2, the water-rising tube 3, and the inner tube 4 are successively reduced. A first water inlet and outlet 201 and a second water inlet and outlet 202 are provided on the side wall of the outermost outer tube 2, the first water inlet and outlet 201 are connected to the first water flow channel 101, and the second water inlet and outlet 202 are connected to the second water flow channel 102.

[0033] In this embodiment, Figure 1 As shown, the first water inlet and outlet 201 and the second water inlet and outlet 202 are respectively arranged on the opposite side walls of the outer tube 2, and when one of the first water inlet and outlet 201 and the second water inlet and outlet 202 is a water inlet, the other is a water outlet.

[0034] like Figure 2 and Figure 4 As shown, when the first water inlet and outlet 201 is the water inlet and the second water inlet and outlet 202 is the water outlet, water flows from the first water inlet and outlet 201 into the first water flow channel 101 and enters the second water flow channel 102 through the guide channel opened inside the guide member 6, and then flows out from the second water inlet and outlet 202; Figure 3 and Figure 5 As shown, when the second water inlet and outlet 202 is the water inlet and the first water inlet and outlet 201 is the water outlet, the water flow direction is just opposite. In specific implementation, the water inlet and outlet can be determined according to actual needs. Preferably, the part with higher temperature on the outer surface of the end cover 1 can be set as the water flow inlet part.

[0035] like Figure 1As shown, the end cover 1 is an annular structure, the inner ring edge of the end cover 1 is sealed to one end of the inner tube 4, and the outer ring edge of the end cover 1 is sealed to one end of the outer tube 2 to form a closed water flow cavity.

[0036] The watertight pipe 3 is located in the water flow cavity, and the other end of the watertight pipe 3 (the end not connected to the first water separator 51) is sealed and connected to the outer pipe 2 through the water seal ring 7, so as to divide the water flow cavity into the first water flow channel 101 and the second water flow channel 102. The water seal ring 7 is an annular structure, the inner ring edge of the water seal ring 7 is sealed and connected to the other end of the watertight pipe 3 (for example, sealed and fixed by welding), and the outer ring edge of the water seal ring 7 is sealed and connected to the inner wall of the outer pipe 2.

[0037] like Figure 1 As shown, the outer tube 2, the watertight pipe 3 and the inner tube 4 have different lengths, the three tubes are at different temperatures during operation, and the materials of the three are also different, so the thermal expansion coefficients are different, that is, the thermal expansion lengths of the three tubes are different. In addition, different tubes have different thermal expansion starting points. For example, in this application, the expansion starting point of the outer tube 2 is S1, the expansion starting point of the watertight pipe 3 is S2, and the expansion starting point of the inner tube 4 is S3. Calculations show that the expansion of the watertight pipe 3 is longer. In order to avoid squeezing the end cover 1, a certain interval is set between one end of the watertight pipe 3 and the end cover 1, and a water flow component 5 and a guide member 6 are sequentially arranged below the watertight pipe 3 to ensure that the water flows through the internal guide channel of the guide member 6. At the same time, the first water separator 51 and the second water separator 52 are separately arranged to reduce the stress concentration problem of the end cover 1 caused by squeezing the end cover 1 due to the thermal expansion of the watertight pipe 3.

[0038] In this embodiment, the first water separator 51 and the second water separator 52 are both L-shaped structures. The first water separator 51 includes a first connecting portion 511 and a second connecting portion 512 that are perpendicular to each other, and the second water separator 52 includes a third connecting portion 521 and a fourth connecting portion 522 that are perpendicular to each other. The first connecting portion 511 and the third connecting portion 521 are arranged opposite to each other, and the first connecting portion 511 and the third connecting portion 521 are arranged opposite to each other in a direction perpendicular to the central axis of the water cooling device (laterally), and the second connecting portion 512 and the fourth connecting portion 522 are arranged opposite to each other in a direction parallel to the central axis of the water cooling device (vertically).

[0039] Specifically, the first water separator 51 is sealed and connected to one end of the watertight pipe 3, for example, the first water separator 51 and the watertight pipe 3 are sealed and fixed by welding, so that the first water separator 51 can move relative to the end cover 1 as the watertight pipe 3 expands and contracts. The second connection part 512 of the first water separator 51 and the fourth connection part 522 of the second water separator 52 are staggered and sealed and connected by a seal 53. Since the seal is a movable seal, the first water separator 51 will not squeeze the second water separator 52 when it moves, and thus will not squeeze the guide member 6 and the end cover 1, thereby reducing the force on the end cover 1 and reducing the risk of damage to the end cover 1 due to stress concentration. The seal 53 seals the first water separator 51 and the second water separator 52, which can prevent the cooling medium from flowing between the first water separator 51 and the second water separator 52, so that the cooling medium flows through the guide member 6 to ensure the cooling effect of the end cover 1.

[0040] like Figure 1 and Figure 2 As shown, the elastic member 54 is disposed between the first water separator 51 and the second water separator 52, and the expansion and contraction direction of the elastic member 54 is the same as the length direction of the watertight pipe 3. Specifically, the elastic member 54 is disposed between the first connection portion 511 of the first water separator 51 and the third connection portion 521 of the second water separator 52 to absorb thermal expansion and contraction to ensure a stable water flow rate.

[0041] Specifically, in actual operation of the water cooling device, due to start-up, shutdown or changes in operating conditions, if at room temperature, the first water separation member 51, the second water separation member 52, the sealing member 53 and the elastic member 54 are in the following state: Figure 2 The state shown in ; when the combustion equipment is running, the water cooling device expands due to heat, especially the watertight pipe 3 expands due to heat, driving the first water separator 51 to move toward the end cover 1; when the car is stopped or the operating conditions change, the watertight pipe 3 contracts, driving the first water separator 51 to move away from the end cover 1. At this time, if there is no elastic member 54, since the first water separator 51 and the second water separator 52 are sealed and connected by the sealing member 53, when the first water separator 51 moves away from the end cover 1, it will drive the second water separator 52 to move together, so that there is a certain distance between the second water separator 52 and the guide member 6; when the car is started again, even if the watertight pipe 3 expands due to heat, driving the first water separator 51 to move toward the end cover 1, there is still a certain distance between the second water separator 52 and the guide member 6. Under the same designed water volume, the flow area becomes larger, the water flow velocity inside the guide member 6 becomes smaller, and the heat exchange effect becomes worse. Therefore, the elastic member 54 is arranged to absorb thermal expansion and contraction, and ensure that the second water separation member 52 and the guide member 6 are in close contact when starting, stopping or the operating conditions change, and prevent a certain distance from being formed between the second water separation member 52 and the guide member 6, thereby ensuring a stable water flow rate, thereby ensuring a stable heat exchange effect, ensuring stable operation of the combustion equipment, and not increasing the consumption of equipment operation.

[0042] The elastic member 54 may be a spring or an expansion joint, or may be other elastically expandable and contractible components, which is not specifically limited in the present invention.

[0043] Figures 2 to 5 The arrangement of the first water separation member 51 and the second water separation member 52 is shown. Figure 2 As shown, combined Figure 1 In this embodiment, the first water inlet and outlet 201 is the water inlet, the second water inlet and outlet 202 is the water outlet, the second connection portion 512 of the first water separator 51 is located radially inside the fourth connection portion 522 of the second water separator 52, and the sealing member 53 is located radially inside the elastic member 54 (based on the central axis of the water cooling device). Figure 3 As shown, combined Figure 1 The structure (ignoring the water flow direction), the first water inlet and outlet 201 is the water outlet, the second water inlet and outlet 202 is the water inlet, the second connecting portion 512 of the first water separator 51 is located radially outside the fourth connecting portion 522 of the second water separator 52, and the sealing member 53 is located radially outside the elastic member 54; Figure 4 As shown, combined Figure 1 The first water inlet and outlet 201 is the water inlet, the second water inlet and outlet 202 is the water outlet, the second connecting portion 512 of the first water separator 51 is located radially outside the fourth connecting portion 522 of the second water separator 52, and the sealing member 53 is located radially inside the elastic member 54; Figure 5 As shown, combined Figure 1 The structure of the first water inlet and outlet 201 is a water outlet, the second water inlet and outlet 202 is a water inlet, the second connection portion 512 of the first water separator 51 is located radially inside the fourth connection portion 522 of the second water separator 52, and the sealing member 53 is located radially outside the elastic member 54. In a specific implementation, the arrangement of the first water separator 51, the second water separator 52, the sealing member 53 and the elastic member 54 can also be in other forms, which can be adjusted according to actual needs, and the present invention is not specifically limited.

[0044] Preferably, the portion with a higher temperature on the outer surface of the end cover 1 can be set as the water inflow portion, and the water flows through the end and heats up before flowing out from the other side. Setting the high-temperature side of the end cover 1 as the water inflow side can make heat exchange more complete, improve heat exchange efficiency, and better cool the high-temperature side of the end cover 1.

[0045] like Figures 2 to 5As shown, a groove 55 for installing the sealing member 53 is provided on the first water separator 51 or the second water separator 52, so as to facilitate the installation of the sealing member 53. In this embodiment, the groove 55 is provided on the side of the second connection portion 512 of the first water separator 51 facing the fourth connection portion 522 of the second water separator 52. In other embodiments, the groove 55 can also be provided on the fourth connection portion 522 of the second water separator 52, which is not specifically limited in the present invention.

[0046] In this embodiment, the sealing member 53 is an elastic sealing component, such as an O-ring, which is installed in the annular gap formed between the first water separator 51 and the second water separator 52. The O-ring is easy to install and has reliable sealing, which can ensure the safe operation of the end cover 1 in a high temperature environment, and will not cause the second water separator 52 to squeeze the end cover 1 due to the downward movement of the first water separator 51, causing stress concentration and damage. In order to ensure that the water flow stably flows through the guide member 6, the guide member 6 is tightly attached to the second water separator 52 and the end cover 1, and there are multiple ways to connect the guide member 6 with the second water separator 52 and the end cover 1.

[0047] In some embodiments, the guide member 6 is in contact with the second water separator 52, and the guide member 6 is in contact with the end cover 1, that is, the guide member 6 is movably connected with the second water separator 52 and the end cover 1; in other embodiments, in order to prevent a certain distance between the second water separator 52 and the guide member 6, the guide member 6 and the second water separator 52 can be fixedly connected, for example, the guide member 6 and the second water separator 52 can be welded together, or can be an integrally formed integrated structure, the guide member 6 is arranged on the end cover 1, and the guide member 6 is in contact with the end cover 1; in other embodiments, the guide member 6 and the end cover 1 can be fixedly connected, for example, the guide member 6 and the end cover 1 can be welded together, or can be an integrally formed integrated structure, the second water separator 52 is arranged on the guide member 6, and the second water separator 52 is in contact with the guide member 6. That is, the guide member 6 is in contact with at least one of the second water separator 52 and the end cover 1 (movably connected), which is convenient for processing and disassembly, and convenient for maintenance.

[0048] like Figure 6 As shown in (a) to (f), the guide member 6 can be one of a straight rib type guide member (a), an involute rib type guide member (b), a cylindrical spoiler type guide member (c), a single helix type guide member (d), a double helix type guide member (e) and a quadruple helix type guide member (f).

[0049] like Figure 1As shown, the water cooling device also includes a three-way pipe 8 arranged at the other end of the outer tube 2 and the inner tube 4 (the end opposite to the end cover 1) to close the end of the water cooling device, the inner ring edge of the three-way pipe 8 facing the outer tube 2 and the inner tube 4 is sealed with the inner tube 4 (for example, sealed and fixed by welding), the outer ring edge is sealed with the outer tube 2, and the end of the three-way pipe 8 away from the outer tube 2 and the inner tube 4 is sealed with the docking flange 91.

[0050] The outer circumference of the outer tube 2 is also sleeved with a mounting flange 92 to facilitate the installation of the water cooling device. The first water inlet and outlet 201 is arranged between the three-way pipe 8 and the water seal ring 7, and the second water inlet and outlet 202 is arranged between the water seal ring 7 and the mounting flange 92.

[0051] It should be noted that the above-mentioned sealing connection can be directly sealed and fixed, such as by welding, or can be sealed and connected through an intermediate piece (such as a sealing ring). The specific connection method is not specifically limited by the present invention.

[0052] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A water cooling device for combustion equipment, characterized in that: It includes an end cover and an outer tube, a watertight pipe and an inner tube which are arranged in sequence from the outside to the inside, one end of the outer tube and one end of the inner tube are connected to the end cover, a first water flow channel is formed between the inner tube and the watertight pipe, and a second water flow channel is formed between the watertight pipe and the outer tube. A water separation component is provided between the outer tube and the inner tube near the end cover, a guide member is provided between the water separation component and the end cover, the first water flow channel and the second water flow channel are connected through the guide member, the water separation component includes a first water separation member and a second water separation member, the first water separation member is connected to one end of the watertight pipe, the second water separation member is connected to the guide member, a sealing member is provided between the first water separation member and the second water separation member to seal the gap therebetween; an elastic member is also connected between the first water separation member and the second water separation member, and the expansion and contraction direction of the elastic member is the same as the length direction of the watertight pipe; The end cover is an annular structure, the inner ring edge of the end cover is sealed and connected to the one end of the inner tube, and the outer ring edge of the end cover is sealed and connected to the one end of the outer tube; The other end of the watertight pipe is sealed and connected to the outer pipe via a water sealing ring. The water sealing ring is an annular structure. The inner ring edge of the water sealing ring is sealed and connected to the other end of the watertight pipe, and the outer ring edge of the water sealing ring is sealed and connected to the inner wall of the outer pipe.

2. The water cooling device for combustion equipment according to claim 1, characterized in that: The first water separation element is sealingly connected to the one end of the watertight pipe.

3. The water cooling device for combustion equipment according to claim 1, characterized in that: One end of the flow guide is in contact with and connected to the second water separation element, and the other end of the flow guide is in contact with and connected to the end cover; or, One end of the flow guide is fixedly connected to the second water separation element, and the other end of the flow guide is in contact with the end cover; or, One end of the flow guide is in contact with and connected to the second water separation member, and the other end of the flow guide is fixedly connected to the end cover.

4. The water cooling device for combustion equipment according to claim 3, characterized in that: When one end of the flow guide is fixedly connected to the second water separator, the flow guide and the second water separator are welded together, or the flow guide and the second water separator are an integrated structure; When the other end of the flow guide is fixedly connected to the end cover, the flow guide and the end cover are welded together, or the flow guide and the end cover are an integrated structure.

5. The water cooling device for combustion equipment according to claim 1, characterized in that: The first water separating member or the second water separating member is provided with a groove for installing the sealing member.

6. The water cooling device for combustion equipment according to claim 1, characterized in that: The sealing member is an O-type sealing ring, and the O-type sealing ring is installed in the annular gap formed between the first water separating member and the second water separating member.

7. The water cooling device for combustion equipment according to claim 1, characterized in that: The elastic member is a spring or an expansion joint.

8. The water cooling device for combustion equipment according to claim 1, characterized in that: The guide piece is one of a straight rib type guide piece, an involute rib type guide piece, a cylindrical spoiler type guide piece, a single helix type guide piece, a double helix type guide piece and a quad helix type guide piece.

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