CN220151628U

CN220151628U - Steam injection equipment

Info

Publication number: CN220151628U
Application number: CN202321497113.8U
Authority: CN
Inventors: 杨龙; 许福生; 曹纯; 张兆赫; 刘硕
Original assignee: Beijing Institute of Aerospace Testing Technology
Current assignee: Beijing Institute of Aerospace Testing Technology
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-12-08
Anticipated expiration: 2033-06-12

Abstract

The utility model belongs to the technical field of liquid rocket engine test processes, and particularly discloses steam injection equipment. The temperature sensing structure of the temperature detecting piece is placed inside the detecting section, the temperature sensing structure is installed on the inner wall of the detecting section, close to the connecting section, and the detecting section of the temperature detecting piece is abutted to the outer wall of the connecting section, so that the temperature sensing structure indirectly detects the temperature of the connecting section; the thermosensitive structure is in communication connection with the signal acquisition equipment through a wire, the spraying piece is in communication connection with the signal acquisition equipment, and the spraying end of the spraying piece is arranged towards one side of the outer wall of the connecting section, so that the spraying piece can receive a spraying signal of the signal acquisition equipment after converting a temperature signal, and the spraying piece can determine whether to spray and cool the connecting section according to the spraying signal. The steam injection equipment of this structure can carry out real-time measurement and control to the temperature of linkage segment, has promoted the practicality of steam injection equipment.

Description

Steam injection equipment

Technical Field

The utility model relates to the technical field of liquid rocket engine test processes, in particular to steam injection equipment.

Background

Liquid rocket engines typically employ a nitro-compound capable of spontaneous combustion (e.g., dinitrogen tetroxide) and a hydrazine compound (e.g., unsymmetrical dimethylhydrazine) as propellants, and engine propellant reservoirs often need to be operated under high vacuum conditions when operated in close proximity or space to the ground. Therefore, when the engine is subjected to a related test in a ground state, a high-vacuum environment with a corresponding height needs to be established in the vacuum cabin to simulate the high-altitude working characteristics of the rocket engine. Because a large amount of high-speed, high-temperature and high-corrosiveness fuel gas is sprayed out when the liquid rocket engine works, a dynamic vacuum environment in a vacuum cabin is maintained, and a large-exhaust-gas-displacement air extractor is required to be connected for injecting the fuel gas.

The common ejector used in the high-altitude simulation test of the liquid rocket engine is steam ejection equipment. The steam injection equipment uses a heating device (such as a steam boiler) to heat water to generate high-temperature and high-pressure steam as an injection air source, and gas generated by ignition of the liquid rocket engine is sucked into the injection equipment, so that the pressure of the vacuum cabin in the high-modulus test process is ensured to be in an equilibrium state. In order to ensure that the steam quantity of the injection equipment is stable and controllable, the steam sent by the steam boiler pipeline reaches a steam outlet through a straight pipe section and enters the steam injection equipment. The gas temperature of the existing liquid rocket engine can reach 3000 ℃ at most. Because engine gas enters the steam injection equipment through the diffuser, the temperature of a connecting section between the diffuser and the injection pipeline continuously rises during experiments. Excessive temperatures will cause cracking of the joint and thus interruption of the test. Under the condition of not changing the main structure of the connecting section, the main body of the connecting section is cooled by adopting a cooling water spraying mode. And an operator controls the spray device to start by observing the color change of the appearance of the connecting section, and the spray device is closed after the color is recovered to be normal.

However, because the mode that the operator relies on sense organ to observe the colour of linkage segment has stronger subjectivity, can appear can not in time opening or closing spray set's phenomenon, and then delay test operation, lead to steam injection equipment's practicality to be insufficient.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is that the mode that an operator observes the color of the connecting section by means of a sense organ in the prior art has strong subjectivity, and the phenomenon that the spraying device cannot be opened or closed in time possibly occurs, so that the practicability of the steam injection equipment is insufficient.

To this end, the utility model provides a steam injection apparatus comprising:

a diffuser;

the injection pipeline is connected with the diffuser through a connecting section;

the temperature detection part comprises a detection section and a thermosensitive structure, the detection section is abutted to the outer wall of the connecting section, the thermosensitive structure is placed inside the detection section and is installed on the inner wall of the detection section, which is close to the connecting section, the thermosensitive structure is in communication connection with the signal acquisition equipment through a wire, the thermosensitive structure is used for detecting the temperature of the outer wall of the connecting section and simultaneously generating a temperature signal, and the generated temperature signal is fed back to the signal acquisition equipment to be converted into a spraying signal;

the spraying piece is in communication connection with the signal acquisition equipment and is used for receiving a spraying signal, the spraying piece is provided with a spraying end, and the spraying direction of the spraying end is towards one side of the outer wall of the connecting section.

Optionally, the steam injection apparatus described above,

the temperature detection part further comprises a shell, and a containing cavity is arranged in the shell;

the detection section is fixedly mounted or movably mounted in the accommodating cavity.

Optionally, the steam injection apparatus described above,

one side of the accommodating cavity is provided with an opening, and the outer wall of the shell far away from the opening is connected with the outer wall of the connecting section;

the temperature detection part further comprises a holding means and a transition section, the holding means and the detection section are arranged at intervals, the transition section is located between the holding means and the detection section, one end of the transition section is fixedly connected with the holding section, the other end of the transition section is directly or indirectly connected with the detection section, and the holding means drives the transition section to move in the holding cavity towards a direction close to or far away from the connection section under the action of external force until the holding section abuts against the end face of one side of the opening of the holding cavity.

Optionally, the steam injection apparatus described above,

the temperature detecting piece further comprises a biasing section, wherein the biasing section is located between the detecting section and the transition section, two ends of the biasing section are respectively connected with the detecting section and the transition section, and the biasing section is in a compression state compressed under the action of external force.

Optionally, the steam injection apparatus described above,

when the biasing section is in a natural state, the sum of the lengths of the biasing section, the transition section and the detection section is larger than the length of the shell.

Optionally, the steam injection apparatus described above,

the shell is also provided with a through hole, and the through hole communicates the outside with the accommodating cavity.

Optionally, the steam injection apparatus described above,

the axis direction of the through hole is crossed with the connecting direction of the handle section and the transition section.

Optionally, the steam injection apparatus described above,

the length of the receiving cavity is equal to the sum of the lengths of the transition section and the detection section.

Optionally, the steam injection apparatus described above,

the outer wall of changeover portion is equipped with external screw thread structure, the inner wall of shell is equipped with internal screw thread structure, the changeover portion with shell threaded connection.

Optionally, the steam injection apparatus described above,

the device also comprises a sealing element, wherein the sealing element is arranged at the communication part of the wire penetrating through the detection section.

The technical scheme provided by the utility model has the following advantages:

the utility model provides steam injection equipment which comprises a diffuser, an injection pipeline, a temperature detection part and a spraying part. The ejector pipeline is connected with the diffuser through a connecting section; the temperature detection part comprises a detection section and a thermosensitive structure, wherein the detection section is abutted to the outer wall of the connecting section, the thermosensitive structure is placed inside the detection section and is installed on the inner wall, close to the connecting section, of the detection section, the thermosensitive structure is in communication connection with the signal acquisition equipment through a wire, the thermosensitive structure is used for detecting the temperature of the outer wall of the connecting section, generating a temperature signal at the same time, and feeding the generated temperature signal back to the signal acquisition equipment to be converted into a spraying signal; the spraying piece is in communication connection with the signal acquisition equipment and is used for receiving a spraying signal, the spraying piece is provided with a spraying end, and the spraying direction of the spraying end is towards one side of the outer wall of the connecting section.

According to the steam injection equipment with the structure, the thermosensitive structure of the temperature detection piece is placed in the detection section, and the thermosensitive structure is arranged on the inner wall of the detection section, which is close to the connecting section, so that the thermosensitive structure can detect the temperature of the detection section; at the moment, the connecting section connects the injection pipeline with the diffuser, and the detecting section of the temperature detecting piece is abutted against the outer wall of the connecting section, so that the temperature at the detecting section is consistent with the temperature of the connecting section, and the thermosensitive structure indirectly detects the temperature of the connecting section; the temperature detected by the thermosensitive structure can be converted into a temperature signal because the thermosensitive structure is in communication connection with the signal acquisition equipment through a wire; in addition, because spray piece and signal acquisition equipment communication connection to the spray end of spray piece sets up towards the outer wall one side of linkage segment, makes the spray piece can receive the signal acquisition equipment and spray the signal after with temperature signal conversion, makes the spray piece can spray the cooling to the linkage segment according to spray the signal decision. Compared with the mode that operating personnel relies on sense organ to observe the colour of linkage segment in current scheme, the steam of this structure draws and draws equipment and can carry out real-time measurement and control to the temperature of linkage segment, has promoted the practicality of steam and draws equipment.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a steam injection apparatus according to an embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a steam injection apparatus according to a first embodiment provided in the embodiment of the present utility model;

FIG. 3 is a schematic semi-sectional view of a housing of the steam injection apparatus according to the embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a steam injection apparatus according to a second embodiment provided in the embodiment of the present utility model;

FIG. 5 is a schematic view of a semi-section of a housing of a steam injection apparatus according to a second embodiment of the present utility model;

reference numerals illustrate:

1-a diffuser;

2-an injection pipeline;

3-connecting sections;

41-a detection section; 42-thermosensitive structure; 43-a housing; 431-receiving cavity; 432-through holes; 44-means of execution; 45-transition section; 46-a bias section;

5-conducting wires;

6-spraying piece;

7-steam pipeline.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

In this embodiment, as shown in fig. 1 to 5, a steam injection apparatus is provided, which includes a diffuser 1, an injection pipe 2, a temperature detecting member, and a spraying member 6. The injection pipeline 2 is connected with the diffuser 1 through a connecting section 3; the temperature detection part comprises a detection section 41 and a thermosensitive structure 42, wherein the detection section 41 is abutted against the outer wall of the connecting section 3, so that the structure detected by the detection section 41 can directly reflect the temperature change of the outer wall of the connecting section 3, the thermosensitive structure 42 is placed inside the detection section 41 and is arranged on the inner wall of the detection section 41, which is close to the connecting section 3, the thermosensitive structure 42 is in communication connection with the signal acquisition equipment through a wire 5, the thermosensitive structure 42 is used for detecting the temperature of the outer wall of the connecting section 3 and simultaneously generating a temperature signal, and the generated temperature signal is fed back to the signal acquisition equipment to be converted into a spraying signal; the spraying piece 6 is in communication connection with the signal acquisition equipment and is used for receiving a spraying signal, the spraying piece 6 is provided with a spraying end, and the spraying direction of the spraying end is arranged towards one side of the outer wall of the connecting section 3.

The steam injection device with the structure enables the thermosensitive structure 42 to detect the temperature of the detection section 41 by placing the thermosensitive structure 42 of the temperature detection piece inside the detection section 41 and installing the thermosensitive structure 42 on the inner wall of the detection section 41 close to the connecting section 3; at this time, the connecting section 3 connects the injection pipeline 2 and the diffuser 1, and the detecting section 41 of the temperature detecting piece is abutted against the outer wall of the connecting section 3, so that the temperature at the detecting section 41 is consistent with the temperature of the connecting section 3, and the thermosensitive structure 42 indirectly detects the temperature of the connecting section 3; the temperature detected by the thermosensitive structure 42 can be converted into a temperature signal because the thermosensitive structure 42 is in communication connection with the signal acquisition equipment through the lead 5; in addition, because spray piece 6 and signal acquisition equipment communication connection to spray end of spray piece 6 sets up towards the outer wall one side of linkage segment 3, makes spray piece 6 can receive the signal acquisition equipment and spray the signal after with temperature signal conversion, makes spray piece 6 can decide whether spray the cooling to linkage segment 3 according to spraying the signal. Compared with the mode that operating personnel relies on sense organ to observe the colour of linkage segment 3 in current scheme, the steam of this structure draws and draws equipment and can measure and control the real-time of linkage segment 3 temperature, has promoted the practicality of steam and draws equipment.

In the present embodiment, the types of the detection section 41 and the thermosensitive structure 42 are not limited. In order to follow the existing practice, the detection section 41 is selected as a probe and the thermosensitive structure 42 is selected as a PT100 sensor.

In this embodiment, the structure of the detecting section 41 is not limited, and as one embodiment, the detecting section 41 is selected to be a cylindrical structure with a hollowed-out interior, one end face is a plane, a through hole 432 through which the wire 5 passes is formed in the center of the other end face, and the pt100 sensitive element is in direct contact with the cylindrical structure; the lead 5 is connected, such as soldered, to the lead of the PT100 sensor after passing through the through hole 432.

In order to facilitate the installation of the detection section 41 and the thermosensitive structure 42, as shown in fig. 1 to 5, the steam injection apparatus provided in this embodiment, the temperature detection member further includes a housing 43. The housing 43 is provided with a receiving cavity 431 inside; the detection section 41 is fixedly mounted or movably mounted in the receiving cavity 431.

As shown in fig. 1 to 5, in the steam injection apparatus provided in this embodiment, one side of the accommodating cavity 431 is an opening, and an outer wall of the outer casing 43 far from the opening is connected with an outer wall of the connecting section 3; the temperature detecting piece further comprises a handling means 44 and a transition section 45, the handling means 44 and the detection section 41 are arranged at intervals, the transition section 45 is located between the handling means 44 and the detection section 41, one end of the transition section 45 is fixedly connected with the handling means 44, the other end of the transition section 45 is directly or indirectly connected with the detection section 41, and the handling means 44 drives the transition section 45 to move in the accommodating cavity 431 towards a direction close to or far away from the connecting section 3 under the action of external force until the handling means 44 abuts against the end face of the opening side of the accommodating cavity 431.

As one embodiment, when the transition section 45 is indirectly connected to the detection section 41, as shown in fig. 1, 4 and 5, the steam injection apparatus provided in this embodiment further includes a biasing section 46, where the biasing section 46 is located between the detection section 41 and the transition section 45, two ends of the biasing section 46 are respectively connected to the detection section 41 and the transition section 45, and the biasing section 46 has a compressed state compressed under the action of external force.

It is noted that, in the present embodiment, when the biasing section 46 is in the natural state, the sum of the lengths of the biasing section 46 and the transition section 45 and the detection section 41 is larger than the length of the housing 43.

As another embodiment, as shown in fig. 1 to 3, when the transition section 45 is directly connected to the detection section 41, the steam injection apparatus provided in this embodiment is further provided with a through hole 432 on the casing 43, where the through hole 432 communicates the outside with the accommodating cavity 431.

The steam injection equipment of this structure is because the inside gas of shell 43 can expand when the temperature-sensing spare is heated, consequently through being equipped with the exhaust hole on shell 43, and the gas after the inflation can be transmitted to external environment through the exhaust hole in, namely under the environment of high temperature, avoids shell 43 to form blind cavity and impaired for the connection of shell 43 and the outer wall of linkage segment 3 is more reliable.

In the present embodiment, the axial direction of the through hole 432 is disposed so as to intersect with the connecting direction of the handle section 44 and the transition section 45.

It may be noted that, in the present embodiment, the length of the accommodating cavity 431 is equal to the sum of the lengths of the transition section 45 and the detection section 41.

In addition, it should be noted that, as shown in fig. 1 to 5, in the steam injection apparatus provided in this embodiment, no matter the transition section 45 is directly or indirectly connected with the detection section 41, the outer wall of the transition section 45 is provided with an external thread structure, the inner wall of the housing 43 is provided with an internal thread structure, and the transition section 45 is in threaded connection with the housing 43, so that the temperature detection part can be integrally fixed on the housing 43, and the detection section 41 is abutted against the outer wall of the connection section 3 in a more reliable manner.

Further, as shown in fig. 1 to 5, in the present embodiment, whether the transition section 45 is directly or indirectly connected to the detection section 41, the transition section 45 is provided in a tubular structure with threads on the outer surface, and at this time, the outer diameter size of the transition section 45 is larger than the size of the probe, and the inner diameter size of the housing 43 is adapted to the outer diameter size of the transition section 45; meanwhile, the center of the transition section 45 is provided with another through hole 432 coaxial with the through hole 432 of the detection section 41, and the lead 5 is connected with the lead of the PT100 sensitive element after penetrating through the through hole 432 of the transition section 45 and the through hole 432 of the detection section 41.

Further, as shown in fig. 1 to 5, in the present embodiment, the structure of the handle section 44 is not limited, and for convenience of operation, the handle section 44 is selected to be a structure for a wrench to twist the hexagonal prism, so that when the wrench is clamped to any two oppositely arranged side wall surfaces in the hexagonal prism to rotate, the transition section 45 is driven to gradually unscrew or screw into the housing 43, thereby opening or closing the accommodating cavity 431. At this time, the handle section 44 is provided with a third through hole 432 coaxial with the through hole 432, and the lead 5 is connected with the lead of the PT100 sensor after passing through the third through hole 432, the through hole 432 of the transition section 45 and the through hole 432 of the detection section 41.

Further, as shown in fig. 1 to 5, in the present embodiment, the handling means 44 and the transition section 45 are integrally formed, and for convenience of machining, a tool retracting groove is provided at the connection between the handling means 44 and the transition section 45.

In addition, as shown in fig. 1, 4 and 5, if the transition section 45 is indirectly connected to the detection section 41, the structure of the biasing member is not limited; the spring structure may be selected to be a part or whole of a member, such as a spring. Meanwhile, the connection mode of the spring, the detection section 41 and the transition section 45 is not limited, one end of the spring can be welded on the end face of the detection section 41 far away from the outer wall of the connection section 3, the other end of the spring can be sleeved on the outer side of the external thread structure or welded on the end face of the external thread structure close to one side of the detection section 41, and the position of the detection section 41 can be changed when the spring stretches.

In addition, as shown in fig. 1 to 5, the steam injection apparatus provided in this embodiment further includes a sealing member, where the sealing member is installed in a through hole 432 where the wire 5 penetrates through the detection section 41. Therefore, cooling water sprayed by the spraying piece 6 can be prevented from entering the detection section 41 from the lead 5, the use of the thermosensitive structure 42 is not affected, and the electric function of the temperature detection piece in the steam injection device is prevented from being affected.

Further, in the present embodiment, the type of the seal is not limited, and may be selected from a green tape, a gasket, a sealant, and the like. In practice, the raw material tape is wound around the external thread structure, and a sealing gasket is installed at the through hole 432 or a sealing manner of high temperature resistant sealant is coated at the through hole 432.

In addition, in the above embodiment, when selecting the wire 5, the wire 5 with the water-draining insulating cover on the surface is selected, and two ends of the wire 5 are connected to the PT100 sensitive element and the lead of the signal acquisition device respectively.

According to the steam injection equipment with the structure, if the mode that the transition section 45 is indirectly connected with the detection section 41 is selected, during installation, the outer shell 43 is welded on the outer wall of the connection section 3, the transition section 45 is in threaded connection with the outer shell 43, the actuating means 44 is screwed towards one side of the connection section 3 by using a wrench, the biasing section 46 is pressed, when the temperature of the connection section 3 rises, the temperature of the outer shell 43 gradually rises, at the moment, the inner part of the outer shell 43 is a blind cavity, namely, the inner volume is fixed, so that gas in the outer shell 43 expands after being heated, the gas compresses a spring, and the spring can adjust the position of the detection section 41 through self deformation, so that the detection section 41 is always abutted against the outer wall of the connection section 3, and the temperature of the connection section 3 is measured more reliably.

According to the steam injection equipment with the structure, if the mode that the transition section 45 is directly connected with the detection section 41 is selected, during installation, the shell 43 is welded on the outer wall of the connection section 3, the transition section 45 is in threaded connection with the shell 43, the actuating means 44 is screwed towards one side of the connection section 3 by using a wrench until the detection section 41 is abutted to the outer wall of the connection section 3, the exhaust hole is formed in the shell 43, when the temperature of the connection section 3 rises, the temperature of the shell 43 rises gradually, and gas is discharged to the outside through the exhaust hole after being heated and expanded, namely, protection of the shell 43 is achieved, meanwhile, the detection section 41 is always abutted to the outer wall of the connection section 3, and the temperature of the connection section 3 is measured more reliably.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A steam injection apparatus, comprising:

a diffuser (1);

the ejector pipeline (2) is connected with the diffuser (1) through the connecting section (3);

the temperature detection part comprises a detection section (41) and a thermosensitive structure (42), wherein the detection section (41) is abutted to the outer wall of the connecting section (3), the thermosensitive structure (42) is placed inside the detection section (41) and is installed on the inner wall, close to the connecting section (3), of the detection section (41), the thermosensitive structure (42) is in communication connection with the signal acquisition equipment through a wire (5), and the thermosensitive structure (42) is used for detecting the temperature of the outer wall of the connecting section (3) and simultaneously generating a temperature signal and feeding the generated temperature signal back to the signal acquisition equipment to be converted into a spraying signal;

the spraying piece (6), spraying piece (6) and signal acquisition equipment communication connection are used for receiving and spray the signal, spraying piece (6) are equipped with the end that sprays, spray the direction of end orientation of spraying outer wall one side setting of linkage segment (3).

2. A steam injection apparatus according to claim 1 wherein,

the temperature detection part further comprises a shell (43), and a containing cavity (431) is arranged in the shell (43);

the detection section (41) is fixedly or movably mounted in the receiving cavity (431).

3. A steam injection apparatus according to claim 2 wherein,

one side of the accommodating cavity (431) is provided with an opening, and the outer wall of the shell (43) far away from the opening is connected with the outer wall of the connecting section (3);

the temperature detection piece further comprises a holding means (44) and a transition section (45), the holding means (44) and the detection section (41) are arranged at intervals, the transition section (45) is located between the holding means (44) and the detection section (41), one end of the transition section (45) is fixedly connected with the holding means (44), the other end of the transition section (45) is directly or indirectly connected with the detection section (41), and the holding means (44) drives the transition section (45) to move towards a direction close to or far away from the connection section (3) in the accommodating cavity (431) until the holding means (44) abuts against the end face of one side of the opening of the accommodating cavity (431) under the action of external force.

4. A steam injection apparatus according to claim 3 wherein,

the temperature detection piece further comprises a biasing section (46), wherein the biasing section (46) is positioned between the detection section (41) and the transition section (45), two ends of the biasing section (46) are respectively connected with the detection section (41) and the transition section (45), and the biasing section (46) is in a compressed state under the action of external force.

5. A steam injection apparatus according to claim 4 wherein,

when the biasing section (46) is in a natural state, the sum of the lengths of the biasing section (46) and the transition section (45) and the detection section (41) is larger than the length of the housing (43).

6. A steam injection apparatus according to claim 3 wherein,

the housing (43) is also provided with a through hole (432), and the through hole (432) communicates the outside with the accommodating cavity (431).

7. A steam injection apparatus according to claim 6 wherein,

the axial direction of the through hole (432) is crossed with the connecting direction of the handle section (44) and the transition section (45).

8. A steam injection apparatus according to claim 6 wherein,

the length of the receiving cavity (431) is equal to the sum of the lengths of the transition section (45) and the detection section (41).

9. A steam injection apparatus according to any one of claims 3 to 8 wherein,

the outer wall of the transition section (45) is provided with an external thread structure, the inner wall of the shell (43) is provided with an internal thread structure, and the transition section (45) is in threaded connection with the shell (43).

10. A steam injection apparatus according to any one of claims 2 to 8 wherein,

the device also comprises a sealing element, wherein the sealing element is arranged at the communication part of the wire (5) penetrating through the detection section (41).