Steam injection device and steam heating thawing system

Abstract

The invention relates to the technical field of pipeline maintenance, and discloses a steam injection device and a steam heating unfreezing system. In the steam injection device, two sets of flexible fixing pieces can be arranged on the two sides of a to-be-unfrozen piece and are installed and fixed to a pipeline, a steam injection assembly comprises at least two injection pieces arranged in the circumferential direction of the flexible fixing pieces at intervals, and the two axial ends of each injection piece are connected to the flexible fixing pieces in a position-adjustable mode; an operator can adjust the position of the spraying part relative to the to-be-unfrozen part according to the size of the to-be-unfrozen part, the heating effect of the steam spraying assembly on the to-be-unfrozen parts of different sizes is improved, and the universality of the steam spraying device on unfreezing operation of the to-be-unfrozen parts of different sizes is improved. The invention further provides a steam heating unfreezing system which comprises a steam generation device and the steam injection device, the steam generation device can generate steam and convey the steam to the steam injection device, and it is guaranteed that the steam injection device stably heats the part to be unfrozen.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline maintenance, and in particular to a steam injection device and a steam heating and thawing system. Background Art

[0002] To improve the safety and stability of natural gas transportation, pressure-regulating valves are often installed on natural gas pipelines. However, these valves are prone to freezing and blocking during winter operation, hindering valve rotation and disrupting normal pipeline pressure regulation. To address this issue, operators typically use a handheld steam torch to heat the valves.

[0003] However, artificial heating is inefficient for heating valves. To improve heating efficiency, a steam nozzle has been proposed. This nozzle consists of an air intake and a pipe connected to each other. Holes are provided on multiple sides of the pipe, allowing steam to be ejected simultaneously in multiple directions, saving time in defrosting.

[0004] However, in the above-mentioned steam nozzle, in order to improve the stability of steam injection, the pipe portion of the steam nozzle needs to be fixedly connected to the shell to be heated during installation. After a single shell to be heated is thawed, the steam nozzle cannot be used for other areas to be heated. The reuse rate of the steam nozzle is low, and the size of the pipe portion is fixed and cannot be adjusted. The steam nozzle cannot be used for heating and thawing operations of valves of different sizes. Summary of the Invention

[0005] Based on the above problems, the purpose of the present invention is to provide a steam injection device and a steam heating and thawing system, which can improve the reuse rate and versatility of the steam injection device, improve the heating effect, increase the heating efficiency, and improve the operating safety of operators.

[0006] To achieve the above objectives, the following technical solutions are provided:

[0007] In a first aspect, the present invention provides a steam injection device for injecting heated steam toward a part to be thawed installed in a pipeline, comprising:

[0008] Two sets of flexible fixing members are arranged parallel to each other and spaced apart, and can be respectively arranged on both sides of the parts to be thawed and fixed to the pipeline;

[0009] The steam injection assembly includes at least two injection members, which are arranged at intervals along the circumference of the flexible fixing member. Each injection member is adjustably connected to a group of flexible fixing members on both sides along the axial direction, and each injection member is provided with at least one row of steam injection holes arranged along the axial direction or at least one steam injection groove extending along the axial direction. The opening of the steam injection hole or the steam injection groove can be directed towards the part to be thawed.

[0010] Optionally, the steam injection device further includes mounting bosses, and each injection member is provided with two groups of mounting bosses spaced apart along the axial direction, the mounting bosses correspond one-to-one to the flexible fixing members, and the mounting bosses are provided with sliding grooves that slide with the flexible fixing members.

[0011] Specifically, the steam injection device also includes a locking assembly, which includes a locking piece and an elastic piece. The mounting boss is provided with a mounting groove connected to the slide groove. One end of the elastic piece is fixed to the bottom of the mounting groove, and the other end is connected to the locking piece. The locking piece at least partially protrudes from the groove of the mounting groove and is located in the slide groove. The flexible fixing piece is provided with multiple locking holes along the length direction. The flexible fixing piece can slide to any locking hole and pass through the mounting groove so that the locking piece can be inserted into the locking hole.

[0012] More specifically, the flexible fixing member is further provided with a plurality of transition holes along the length direction. The transition holes correspond to the locking holes one by one and are interconnected. The locking member can slide through the transition holes to be locked with the locking holes.

[0013] Optionally, a groove wall on a side of the sliding groove away from the installation groove is provided with an escape portion.

[0014] Optionally, one of the first end and the second end of the flexible fixing member is provided with a connecting hole, and the other is provided with a connecting protrusion that can be plugged into and matched with the connecting hole.

[0015] In a second aspect, the present invention further provides a steam heating thawing system, comprising a steam generating device and the above-mentioned steam injection device, wherein the steam generating device is capable of generating steam and delivering the steam to the steam injection device.

[0016] Specifically, the steam heating and thawing system also includes a water collecting container and a circulation device. The water collecting container is used to collect condensed water. The water collecting container is arranged below the steam injection device and is connected to the steam generating device through a connecting pipe. The circulation device is arranged on the connecting pipe between the steam generating device and the water collecting container, and can circulate the condensed water in the water collecting container to the steam generating device.

[0017] More specifically, the circulation device includes a first impeller and a second impeller, and the first impeller is coaxially connected to the second impeller. The steam generating device can transport steam to the circulation device to drive the first impeller to rotate in a first direction and drive the second impeller to rotate in a second direction. When the second impeller rotates, the condensed water in the water collection container can be diverted to the steam generating device. The first direction and the second direction are opposite.

[0018] Furthermore, the circulation device also includes a gear assembly, which includes a first gear and a second gear that are meshed with each other and coaxially arranged, the first gear is coaxially connected to the first impeller, and the second gear is coaxially connected to the second impeller, and the first impeller can drive the first gear to rotate in a first direction, so that the second gear drives the second impeller to rotate in a second direction.

[0019] The beneficial effects of the present invention are:

[0020] The present invention proposes a steam injection device, comprising two sets of flexible fixings and a steam injection assembly. The two sets of flexible fixings can be arranged on both sides of the workpiece to be thawed and fixed to the pipeline. The steam injection assembly includes at least two injection members arranged at intervals along the circumference of the flexible fixings. Both axial ends of each injection member are adjustably connected to the flexible fixings. The operator can adjust the position of the injection member relative to the workpiece to be thawed according to the size of the workpiece to be thawed, thereby improving the heating effect of the steam injection assembly on workpieces to be thawed of different sizes and enhancing the versatility of the steam injection device in thawing operations for workpieces to be thawed of different sizes. In addition, by providing the flexible fixings, the steam injection assembly can be flexibly assembled with the workpiece to be thawed. After use, the steam injection device proposed by the present invention can be installed in other areas for operation, thereby improving the reuse rate of the steam injection device. Each ejector element is equipped with at least one row of axially aligned steam injection holes or at least one axially extending steam injection slot. The steam injection holes or slots can be oriented toward the item to be thawed. Compared to manual handheld steam spray guns, the steam injection holes and slots on the ejector element increase heating efficiency for the item to be thawed. Furthermore, the steam injection assembly is stably connected to the item to be thawed via a flexible fastener, eliminating the need for close operator access, ensuring operational safety and reducing labor intensity.

[0021] The present invention also proposes a steam heating thawing system, including a steam generating device and the above-mentioned steam injection device. The steam generating device can generate steam and transport the steam to the steam injection device, providing a steam source for the steam injection device to ensure the stable heating operation of the steam injection device on the thawed parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0023] Figure 1 is a schematic structural diagram of a steam injection device provided by a specific embodiment of the present invention at a first viewing angle;

[0024] Figure 2 is a schematic structural diagram of a steam injection device provided by a specific embodiment of the present invention at a second viewing angle;

[0025] Figure 3 is a structural schematic diagram of a flexible fixing member provided in a specific embodiment of the present invention;

[0026] Figure 4 This is a partial structural diagram of the steam injection device provided in a specific embodiment of the present invention. Figure 1 ;

[0027] Figure 5 yes Figure 4 Enlarged view of part A;

[0028] Figure 6 This is a partial structural diagram of the steam injection device provided in a specific embodiment of the present invention. Figure 2 ;

[0029] Figure 7 yes Figure 6 Enlarged view of part B;

[0030] Figure 8 It is a structural schematic diagram of a circulation device provided in a specific embodiment of the present invention;

[0031] Figure 9 It is a schematic structural diagram of the first impeller and the second impeller provided in a specific embodiment of the present invention.

[0032] In the picture:

[0033] 1. Steam injection assembly; 11. Injection member; 111. Steam injection hole;

[0034] 2. Flexible fixing member; 21. First end; 211. Connecting protrusion; 22. Second end; 221. Connecting hole;

[0035] 23. Locking hole; 24. Transition hole;

[0036] 3. Mounting boss; 31. Slide; 32. Avoidance portion;

[0037] 4. Locking assembly; 41. Locking member; 42. Elastic member;

[0038] 5. Circulation device; 51. First impeller; 52. Second impeller. DETAILED DESCRIPTION

[0039] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed or detachable connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention.

[0042] like Figures 1 to 9 As shown, this embodiment provides a steam injection device for injecting heating steam to a part to be thawed installed in a pipeline, comprising two groups of flexible fixing members 2 parallel to each other and spaced apart and a steam injection assembly 1, wherein the flexible fixing members 2 can be respectively arranged on both sides of the part to be thawed and fixed to the pipeline, and the steam injection assembly 1 comprises at least two injection members 11, at least two injection members 11 are spaced apart along the circumference of the flexible fixing member 2, each injection member 11 is adjustably connected to a group of flexible fixing members 2 on both sides along the axial direction, and each injection member 11 is provided with at least one row of steam injection holes 111 arranged along the axial direction or at least one steam injection groove extending along the axial direction, and the opening of the steam injection hole 111 or the steam injection groove can face the part to be thawed.

[0043] In this embodiment, two sets of flexible fixings 2 can be set on both sides of the parts to be thawed and fixed to the pipe. The steam injection assembly 1 includes at least two injection members 11 arranged at intervals along the circumference of the flexible fixing member 2. The axial ends of each injection member 11 are adjustably connected to the flexible fixing member 2. The operator can adjust the position of the injection member 11 relative to the parts to be thawed according to the size of the parts to be thawed, thereby improving the heating effect of the steam injection assembly 1 on parts to be thawed of different sizes and improving the versatility of the steam injection device in thawing operations of parts to be thawed of different sizes. In addition, by providing two sets of flexible fixings 2, the steam injection assembly 1 and the parts to be thawed can be flexibly assembled. After use, the steam injection device proposed by the present invention can be installed in other areas for operation, thereby improving the reuse rate of the steam injection device. Each ejection element 11 is provided with at least one row of axially arranged steam ejection holes 111 or at least one axially extending steam ejection slot. The steam ejection holes 111 or the steam ejection slots can be oriented toward the item to be thawed. Compared to manually using a handheld steam spray gun, the provision of steam ejection holes 111 and steam ejection slots on the ejection element 11 increases heating efficiency for the item to be thawed. Furthermore, the steam ejection assembly 1 is stably connected to the item to be thawed via a flexible fixing member 2, eliminating the need for close operator access. This ensures operator safety and reduces labor intensity.

[0044] For example, the injection member 11 is provided with three rows of steam injection holes 111, which are spaced apart along the circumference of the injection member 11. The first row of steam injection holes 111 can inject steam in the radial direction of the pipe, the second row of steam injection holes 111 can inject steam upward at a 45° angle to the radial direction of the pipe, and the third row of steam injection holes 111 can inject steam downward at a 45° angle to the radial direction of the pipe. In other embodiments, the injection member 11 can be provided with other numbers of steam injection holes 111, and steam injection holes 111 with other injection angles can also be provided, which are not specifically limited here.

[0045] Specifically, if Figure 1-Figure 3As shown, one of the first end 21 and the second end 22 of the flexible fixing member 2 is provided with a connection hole 221, and the other is provided with a connection protrusion 211 that can be plugged into the connection hole 221. The plugging and matching of the first end 21 and the second end 22 can achieve a quick connection between the two. It is understandable that each group of flexible fixing members 2 can include multiple flexible fixing members 2 that are spliced ​​together. For example, the first end 21 of one flexible fixing member 2 can be connected to the second end 22 of another flexible fixing member 2 adjacent to the flexible fixing member 2 to achieve the effect of extending the length, so that the steam injection device can also be installed on a large diameter pipe to thaw the parts to be thawed installed on the large diameter pipe, thereby improving the versatility of the steam injection device. Providing multiple flexible fixing members 2 can also reduce the bearing strength of a single flexible fixing member 2. In other embodiments, the first end 21 and the second end 22 of the flexible fixing member 2 can also be connected by a snap fastener, which is not limited here.

[0046] Alternatively, as Figure 1 and Figure 4 As shown, the steam injection device also includes a mounting boss 3, and each injection member 11 is provided with two groups of mounting bosses 3 spaced apart along the axial direction. The mounting bosses 3 correspond one to one with the flexible fixing member 2, and the mounting bosses 3 are provided with a slide groove 31 that slides with the flexible fixing member 2. The injection member 11 can adjust its own position relative to the flexible fixing member 2 through the slide groove 31 provided by the mounting boss 3, thereby improving the heating effect and heating uniformity of the injection member 11 on the thawed parts of different sizes. The installation boss 3 is provided and the slide groove 31 that slides with the flexible fixing member 2 is provided in the installation boss 3. It can reduce the difficulty of adjusting the position of the injection member 11 and facilitate the assembly of the injection member 11 and the flexible fixing member 2. In this embodiment, the mounting boss 3 is sleeved on the injection member 11 to simplify the assembly process of the mounting boss 3 and the steam injection assembly 1.

[0047] For example, the width of the slide groove 31 is consistent with the width of the flexible fixing member 2. When the operator slides the injection member 11 along the circumferential direction of the flexible fixing member 2, both sides of the flexible member along the width direction abut against the groove walls on both sides of the slide groove 31 to improve the sliding stability of the injection member 11.

[0048] In other embodiments, a rack structure may also be provided on the groove wall of the sliding groove 31 , and the flexible fixing member 2 is provided with a tooth groove engaged with the rack structure.

[0049] Preferably, if Figure 1-Figure 7As shown, the steam injection device can also include a locking assembly 4, which includes a locking member 41 and an elastic member 42. The mounting boss 3 is provided with a mounting groove connected to the slide groove 31. One end of the elastic member 42 is fixed to the bottom of the mounting groove, and the other end is connected to the locking member 41. The locking member 41 at least partially protrudes from the notch of the mounting groove and is located in the slide groove 31. The flexible fixing member 2 is provided with multiple locking holes 23 along the length direction. The flexible fixing member 2 can slide to any locking hole 23 and pass through the mounting groove so that the locking member 41 can be inserted into the locking hole 23. One end of the elastic member 42 is fixed to the bottom of the mounting groove and the other end is connected to the locking member 41. When the flexible fixing member 2 slides in the slide groove 31, the locking member 41 can be pressed into the mounting groove and the elastic member 42 can be compressed. When the locking hole 23 and the mounting groove are connected, the locking member 41 can be inserted into the locking hole 23 under the reset effect of the elastic member 42, so that the flexible fixing member 2 is fixed relative to the mounting boss 3. When the flexible fixing member 2 continues to slide along the slide groove 31, the flexible fixing member 2 can continue to press the locking member 41 into the mounting groove until the next locking hole 23 of the flexible fixing member 2 is connected to the mounting groove. The provision of the locking assembly 4 can realize a multi-stage automatic locking and unlocking process of the flexible fixing member 2 during the sliding process, improve the stability of the connection between the flexible fixing member 2 and the mounting boss 3 when connecting the steam injection assembly 1 and the parts to be thawed of different sizes, ensure that the steam injection assembly 1 can stably heat the parts to be thawed, and avoid excessive shaking of the flexible fixing member 2 when the steam injection device injects steam, thereby reducing the heating effect of the parts to be thawed. Exemplarily, the elastic member 42 is a spring, a torsion spring, a bellows, or the like.

[0050] In this embodiment, the portion of locking member 41 protruding from the mounting slot has a spherical surface, allowing the operator to complete the multi-stage self-locking and unlocking process of flexible fixing member 2 with minimal force, thereby reducing the operator's operational difficulty. For example, locking member 41 is a steel ball or a locking pin with a rounded end.

[0051] Furthermore, the flexible fixing member 2 is provided with a plurality of transition holes 24 along its length. The transition holes 24 correspond one-to-one with the locking holes 23 and are interconnected. The locking member 41 can slide through the transition holes 24 until it is locked with the locking holes 23. The provision of the transition holes 24 provides a sliding guide for the locking member 41, and also reduces the impact of the sliding process on the flexible fixing member 2, thereby reducing the degree of deformation of the flexible fixing member 2 after multiple adjustments. For example, the flexible fixing member 2 is an elastic band or a tough steel band. In this embodiment, the transition holes 24 are elongated holes, and the locking holes 23 are circular holes.

[0052] Preferably, an avoidance portion 32 is provided on the groove wall of the slide groove 31 away from the installation groove to facilitate the operator to adjust the position of the locking member 41, to avoid the existence of the groove wall of the slide groove 31 interfering with the locking process of the locking member 41, and to reserve sufficient reset space for the locking member 41 under the action of the elastic member 42, to ensure that the locking member 41 is locked in place, so as to improve the connection reliability between the steam injection device and the installation pipeline of the part to be thawed.

[0053] This embodiment also provides a steam heating thawing system, including a steam generating device and the above-mentioned steam injection device. The steam generating device can generate steam and transport the steam to the steam injection device, providing a steam source for the steam injection device, and ensuring the stable heating operation of the steam injection device on the thawed parts.

[0054] Specifically, the steam heating thawing system further includes a water collection container and a circulation device 5. The water collection container is used to collect condensed water. The water collection container is arranged below the steam injection device and is connected to the steam generating device through a connecting pipe. The circulation device 5 is arranged on the connecting pipe between the steam generating device and the water collection container, and can circulate the condensed water in the water collection container to the steam generating device. In the above-mentioned steam injection device, the water collection container is arranged below the steam injection device. The steam injection device can spray steam toward the parts to be thawed. When the steam thaws the parts to be thawed, condensed water is formed. The water collection container can collect the condensed water generated during the thawing process to prevent the condensed water from refreezing after being cooled in the working area, which may cause personnel to accidentally slip during inspections. The provision of a water collection container to collect condensed water can ensure the safety of the operating personnel. The circulation device 5 can divert the condensed water in the water collection container to the steam generating device, so that the steam generating device can continue to heat the condensed water in the water collection container into steam and transport the steam to the steam injection device. The provision of the water collection container and the circulation device 5 can realize the recycling and reuse of the condensed water. The provision of the steam generating device can reheat and vaporize the condensed water in the water collection container and transport the generated steam to the steam injection device, so that the condensed water can be recycled and reused, thereby reducing resource waste.

[0055] More specifically, if Figure 8 and Figure 9As shown, the circulation device 5 includes a first impeller 51 and a second impeller 52, which are coaxially connected. The steam generator can deliver steam to the circulation device 5 to drive the first impeller 51 to rotate in a first direction and the second impeller 52 to rotate in a second direction. When the second impeller 52 rotates, it can divert condensed water in the water collection container to the steam generator. The first and second directions are opposite. The installation of the circulation device 5 can realize the self-circulation process of the steam heating and thawing system. Initially, the steam generator supplies heated steam to the steam injection device and the circulation device 5, so that the steam injection device injects heated steam to the thawed parts to thaw. When the heated steam flows, it also drives the first impeller 51 of the circulation device 5 to start rotating, thereby driving the second impeller 52 to rotate in the second direction and diverting the condensed water collected in the water collection container to the steam generator. Compared with other usage scenarios that require additional driving equipment to drive the circulation device 5, this saves driving costs and can realize multiple processes while reducing energy consumption. The overall operation of the steam heating and thawing system is highly economical. Exemplarily, the circulation device 5 may be a diversion pump, a straight pipe section is provided at the inlet of the diversion pump, and a rectifier for stabilizing the airflow is installed in the straight pipe section so that the first impeller 51 of the diversion pump can rotate at a relatively small steam flow rate.

[0056] Furthermore, the circulation device 5 also includes a gear assembly, which includes a first gear and a second gear that are meshed and coaxially arranged. The first gear is coaxially connected to the first impeller 51, and the second gear is coaxially connected to the second impeller 52. The first impeller 51 can drive the first gear to rotate in a first direction, so that the second gear drives the second impeller 52 to rotate in a second direction. The rotation of the first impeller 51 and the second impeller 52 in opposite directions is achieved by the first gear and the second gear, which improves the transmission accuracy and transmission precision between the first impeller 51 and the second impeller 52.

[0057] For example, the part to be thawed is a valve installed in a pipeline. When the first end 21 and the second end 22 of the flexible fixing member 2 are connected, they can surround the pipeline on the outer periphery of the valve, thereby fixing the position of the steam injection assembly 1 relative to the valve. The steam injection assembly 1 is then connected to a steam generator, a water collection container is arranged below the steam injection device, and a circulation device 5 is arranged on the connecting pipe between the steam generator and the water collection container. The steam generator is then started to generate heated steam and transport it to the steam injection device, thereby heating and thawing the valve. The heated steam cools and produces condensed water. The water collection container collects this condensed water to prevent people from slipping and falling when passing by. The steam generated by the steam generator can also drive the first impeller 51 in the circulation device 5 to rotate, thereby driving the second impeller 52 to rotate in the opposite direction and guide the condensed water in the water collection container to the steam generator for further heating, thereby realizing the reuse of condensed water resources and reducing energy consumption. Preferably, to reduce damage to the valve during heating by the heated steam, the valve can be wrapped with a cotton blanket before thawing, and then the thawing operation can be carried out.

[0058] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A steam injection device for injecting heated steam to the parts to be thawed installed in the pipeline, characterized in that: include: Two sets of flexible fixing members (2) that are parallel to each other and spaced apart can be respectively arranged on both sides of the part to be thawed and fixed to the pipeline; A steam injection assembly (1) comprises at least two injection members (11), wherein the at least two injection members (11) are arranged at intervals along the circumference of the flexible fixing member (2), each injection member (11) is respectively connected to a group of the flexible fixing members (2) in an adjustable manner on both sides along the axial direction, and each injection member (11) is provided with at least one row of steam injection holes (111) arranged along the axial direction or at least one steam injection groove extending along the axial direction, and the opening of the steam injection hole (111) or the steam injection groove can face the part to be thawed.

2. The steam injection device according to claim 1, characterized in that The steam injection device further comprises a mounting boss (3), each of the injection members (11) being provided with two groups of mounting bosses (3) spaced apart along the axial direction, the mounting bosses (3) corresponding one to one with the flexible fixing members (2), and the mounting bosses (3) being provided with a sliding groove (31) for sliding engagement with the flexible fixing members (2).

3. The steam injection device according to claim 2, characterized in that The steam injection device further comprises a locking assembly (4), wherein the locking assembly (4) comprises a locking member (41) and an elastic member (42), the mounting boss (3) is provided with a mounting groove connected to the slide groove (31), one end of the elastic member (42) is fixed to the groove bottom of the mounting groove, and the other end is connected to the locking member (41), the locking member (41) at least partially protrudes from the groove opening of the mounting groove and is located in the slide groove (31), the flexible fixing member (2) is provided with a plurality of locking holes (23) along the length direction, the flexible fixing member (2) can slide to any of the locking holes (23) and pass through the mounting groove, so that the locking member (41) can be inserted into the locking hole (23).

4. The steam injection device according to claim 3, characterized in that The flexible fixing member (2) is further provided with a plurality of transition holes (24) along the length direction. The transition holes (24) correspond to the locking holes (23) one by one and are interconnected. The locking member (41) can slide through the transition holes (24) to be locked with the locking holes (23).

5. The steam injection device according to claim 3, characterized in that A groove wall of the sliding groove (31) away from the installation groove is provided with an escape portion (32).

6. The steam injection device according to any one of claims 1 to 5, characterized in that: One of the first end (21) and the second end (22) of the flexible fixing member (2) is provided with a connection hole (221), and the other is provided with a connection protrusion (211) capable of plugging and matching with the connection hole (221).

7. Steam heating thawing system, characterized in that: The invention comprises a steam generating device and the steam injection device according to any one of claims 1 to 6, wherein the steam generating device is capable of generating steam and delivering the steam to the steam injection device.

8. The steam heating thawing system according to claim 7, characterized in that: The steam heating and thawing system further comprises a water collecting container and a circulation device (5), wherein the water collecting container is used to collect condensed water, the water collecting container is arranged below the steam injection device and is connected to the steam generating device through a connecting pipe, and the circulation device (5) is arranged on the connecting pipe between the steam generating device and the water collecting container, and can circulate the condensed water in the water collecting container to the steam generating device.

9. The steam heating thawing system according to claim 8, characterized in that: The circulation device (5) comprises a first impeller (51) and a second impeller (52), wherein the first impeller (51) and the second impeller (52) are coaxially connected, and the steam generating device is capable of delivering steam to the circulation device (5) to drive the first impeller (51) to rotate in a first direction and drive the second impeller (52) to rotate in a second direction. When the second impeller (52) rotates, the condensed water in the water collection container is directed to the steam generating device, and the first direction and the second direction are opposite.

10. The steam heating thawing system according to claim 9, characterized in that: The circulation device (5) further comprises a gear assembly, wherein the gear assembly comprises a first gear and a second gear that are meshed with each other and coaxially arranged, wherein the first gear is coaxially connected to the first impeller (51), and the second gear is coaxially connected to the second impeller (52), and the first impeller (51) can drive the first gear to rotate in the first direction, so that the second gear drives the second impeller (52) to rotate in the second direction.

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