CN216158550U

CN216158550U - Pipeline falling detection joint structure

Info

Publication number: CN216158550U
Application number: CN202122225198.1U
Authority: CN
Inventors: 赵玲; 曹霄晨; 王文勇; 王维; 姜海波; 周水杉
Original assignee: Hebei Zhongchi Electronic Technology Co ltd
Current assignee: Hebei Zhongchi Electronic Technology Co ltd
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-04-01
Anticipated expiration: 2031-09-14

Abstract

The utility model provides a pipeline falling detection joint structure, which belongs to the technical field of automobile pipeline connection systems and comprises a female joint, a male joint and a falling detection switch; the female connector comprises a female plug pipeline, a base cavity connected with the female plug pipeline and a sealing cover body in sealing fit with the base cavity, and the base cavity and the sealing cover body jointly form a containing cavity for containing the falling detection switch; the male connector comprises a male plug-in pipeline which is in plug-in fit with the female plug-in pipeline; the falling detection switch comprises a first electrode and a second electrode which are connected to the closed cover body, a push rod which is in sliding fit with the base cavity, and an elastic piece which is arranged between the closed cover body and the push rod, wherein one end, far away from the closed cover body, of the push rod extends out of the base cavity. The circumferential profile of the ejector rod is provided with a conductive part which can be in butt connection with the first electrode and the second electrode, and when the ejector rod is close to or far away from the closed cover body, the ejector rod is directly in butt connection with the first electrode and the second electrode, so that effective butt connection is realized.

Description

Pipeline falling detection joint structure

Technical Field

The utility model belongs to the technical field of automobile pipeline connecting systems, and particularly relates to a pipeline falling detection joint structure.

Background

The crankcase ventilation pipeline is an important component in an engine system, and mainly has the function of transmitting blow-by gas in a crankcase of the engine to an air intake system through a pipeline and then entering a combustion chamber for combustion. The emission limit and the measurement method of the GB18352-2016 light automobile pollutants (sixth stage of China) are clearly defined as follows: the crankcase ventilation system circuit needs to be kept intact and must be diagnosed if it cannot be exempted in order to prevent the exhaust gases from escaping and polluting the atmosphere.

Therefore, in order to ensure that when the pipeline connection part is dropped or disconnected, an online diagnosis function can be realized, and an identification signal is fed back to the engine control system in time to perform diagnosis and maintenance operation. Usually, pipeline connection structure includes female joint, the male joint, and detect the detection switch that drops whether female joint and male joint drop, the detection switch that drops includes first electrode, the second electrode, metal shrapnel, spring and ejector pin, when the male joint is fit for with the female joint completely, the male joint makes the ejector pin upwards slide, ejector pin compression spring, and drive metal shrapnel simultaneously with first electrode and second electrode butt, thereby make first electrode and second electrode switch on, when the male joint breaks away from the female joint, the reaction force of spring makes the ejector pin slide downwards, and drive metal shrapnel and keep away from first electrode and second electrode, thereby make first electrode and second electrode disconnection, so can realize that the pipeline drops the detection function.

However, the metal spring plate is easily damaged by fatigue in a repeated reciprocating process, so that the deformability becomes low or even disappears, and an effective abutting relation cannot be realized, so that the first electrode and the second electrode cannot be accurately conducted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pipeline falling detection joint structure, and aims to solve the technical problems that in a traditional falling detection switch, a metal elastic sheet is easy to fatigue damage in a repeated reciprocating process, so that the deformation capability is lowered or even disappears, an effective abutting relation cannot be realized, and a first electrode and a second electrode cannot be accurately conducted.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a pipeline falling detection connector structure, which comprises a female connector, a male connector and a falling detection switch; the female connector comprises a female plug pipeline, a base cavity connected with the female plug pipeline and a sealing cover body in sealing fit with the base cavity, and the base cavity and the sealing cover body jointly form a containing cavity for containing the falling detection switch; the male connector comprises a male plugging pipeline which can be plugged and matched with the female plugging pipeline; the falling detection switch comprises a first electrode and a second electrode which are connected with the closed cover body, a push rod which can be in sliding fit with the base cavity, and an elastic piece arranged between the closed cover body and the push rod, wherein one end of the push rod, which is far away from the closed cover body, extends out of the base cavity;

when the male plug-in pipeline and the female plug-in pipeline are completely matched, the male plug-in pipeline pushes the ejector rod to move towards the direction close to the closed cover body, the elastic piece is compressed, the conductive part is in butt conduction with the first electrode and the second electrode, and the falling-off detection switch is in a closed state;

when the male plugging pipeline and the female plugging pipeline are separated from being matched, the elastic piece enables the ejector rod to move towards the direction far away from the closed cover body, the conductive part is separated from the first electrode and the second electrode, and the falling detection switch is in a disconnected state.

In one possible implementation manner, the first electrode and the second electrode are symmetrically arranged, and the ejector rod and the elastic piece move in the direction of a symmetry axis between the first electrode and the second electrode; the first electrode and the second electrode are respectively provided with a first metal elastic sheet and a second metal elastic sheet which are arranged in a bent mode, the conductive part comprises a first conductive block and a second conductive block, the first conductive block can be connected with the first metal elastic sheet in a butting mode, the second conductive block can be connected with the second metal elastic sheet in a butting mode, or the conductive part is an annular conductive strip, the first metal elastic sheet and the second metal elastic sheet can be connected with the conductive strip in a butting mode.

In a possible implementation mode, the circumferential profile of the ejector rod is provided with an anti-mistake rib, and the base cavity is provided with a mounting groove matched with the anti-mistake rib.

In a possible implementation manner, the circumferential profile of the ejector rod is provided with a limiting step, the closed cover body is provided with a limiting groove, and the elastic part is limited between the limiting step and the limiting groove.

In a possible implementation manner, a first clamping groove is formed in the circumferential profile of the ejector rod, and a first sealing ring which is in sealing sliding arrangement with the base cavity is matched in the first clamping groove, so that the accommodating cavity is divided into a first cavity for accommodating the first electrode and the second electrode, and a second cavity for communicating with the outside.

In a possible implementation manner, a second clamping groove is formed in the outer wall of the female insertion pipeline, and a second sealing ring in sealed insertion fit with the inner wall of the male insertion pipeline is matched in the second clamping groove.

In a possible implementation manner, the inner wall of the male insertion pipeline can be inserted into the outer wall of the female insertion pipeline, the female connector further comprises an accommodating cavity connected with the cavity of the base and arranged around the female insertion pipeline, the accommodating cavity is provided with a through clamping groove penetrating through the accommodating cavity in the wall thickness direction, and an elastic blocking arm used for tightly pushing the male insertion pipeline is detachably arranged in the through clamping groove.

In one possible implementation manner, the circumferential profile of the male plugging pipe adjacent to the plugging end part thereof is provided with a conical boss which can be in butt fit with the ejector rod, and the conical boss and the elastic blocking arm can be in butt fit in the plugging direction.

In a possible implementation manner, the outer wall of the accommodating cavity is provided with a fixed clamping groove, the elastic blocking arm is in a U shape, and two ends of an opening of the elastic blocking arm are provided with bent clamping strips which can be matched in the fixed clamping groove.

In a possible implementation manner, two sets of limit stops symmetrically arranged about the through clamping groove are arranged on the outer wall of the accommodating cavity, and the part of the elastic blocking arm outside the accommodating cavity is limited in a limit space formed by the two sets of limit stops.

The pipeline falling detection joint structure provided by the utility model at least has the following technical effects: compared with the prior art, the pipeline falling detection joint structure provided by the utility model has the advantages that the conductive part which can be abutted and conducted with the first electrode and the second electrode is arranged on the circumferential outline of the ejector rod, and when the ejector rod is close to or far away from the closed cover body in the process that the male joint is completely adapted to or separated from the female joint, the conductive part is directly abutted and conducted with the first electrode and the second electrode, a metal elastic sheet with deformability is not needed, the effective abutting relation can be realized by utilizing the self structure of the ejector rod, so that the first electrode and the second electrode can be accurately conducted, and the accuracy and the reliability of a pipeline falling detection result are improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is an exploded view of a pipeline detachment detection joint structure according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating the separation of a male connector from a female connector according to an embodiment of the present invention;

FIG. 3 is a partial schematic view of a male connector fully mated with a female connector in accordance with an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a male connector fully mated with a female connector in accordance with an embodiment of the present invention;

FIG. 5 is a partial schematic view of a male connector not fully mated with a female connector according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a male connector and a female connector of an embodiment of the present invention when the male connector and the female connector are not fully mated;

FIG. 7 is a schematic structural diagram of a fall-off detection switch according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a fall-off detection switch according to another embodiment of the present invention.

Description of reference numerals:

1. pipeline falling detection joint structure

100. Female joint 110, female insertion pipeline 111 and second sealing ring

120. Base cavity 121, mounting groove 122 and third clamping groove

123. Third seal ring 130, sealing cover 131 and limiting groove

132. First cavity 133, second cavity 140, and accommodating cavity

141. A through clamping groove 142, a fixed clamping groove 143 and a limit stop

150. Elastic blocking arm 151, bent clamping strip 160 and heating assembly

170. Radiating pipe 200, male connector 210 and male plug connecting pipeline

211. Conical boss 300, fall-off detection switch 310, first electrode

311. First metal dome 320, second electrode 321, and second metal dome

330. Top rod 331, conductive part 332, mistake proofing rib

333. Spacing step 334, first draw-in groove 335, first sealing washer

340. Elastic piece

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on," "disposed on," or "secured to" another element, it can be directly on the other element or intervening elements may also be present. "plurality" means two or more.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Referring to fig. 1 to 8, a pipeline detachment detecting joint structure 1 according to an embodiment of the present invention will be described.

Referring to fig. 1 to 8, an embodiment of the utility model provides a connector structure 1 for detecting pipeline falling, including a female connector 100, a male connector 200 and a falling detection switch 300; the female connector 100 includes a female plug pipe 110, a base cavity 120 connected to the female plug pipe 110, and a sealing cover 130 hermetically fitted to the base cavity 120, wherein the base cavity 120 and the sealing cover 130 together form a receiving cavity for receiving the drop detection switch 300; the male connector 200 comprises a male plug-in pipe 210 which can be plugged and matched with the female plug-in pipe 110; the fall detection switch 300 includes a first electrode 310 and a second electrode 320 connected to the sealing cover 130, a lift pin 330 slidably engaged with the base cavity 120, and an elastic member 340 disposed between the sealing cover 130 and the lift pin 330, wherein one end of the lift pin 330 away from the sealing cover 130 extends out of the base cavity 120.

When the male plugging pipe 210 and the female plugging pipe 110 are completely matched, the male plugging pipe 210 pushes the push rod 330 to move towards the direction close to the closed cover 130, the elastic piece 340 is compressed, the conductive part 331 is in abutting conduction with both the first electrode 310 and the second electrode 320, and the falling-off detection switch 300 is in a closed state; when the male plug-in pipe 210 is disengaged from the female plug-in pipe 110, the elastic element 340 moves the push rod 330 in a direction away from the sealing cover 130, the conductive portion 331 is separated from the first electrode 310 and the second electrode 320, and the falling-off detection switch 300 is in an off state.

Specifically, the sealing cover 130 and the base cavity 120 together form a containing cavity for containing the falling detection switch 300, and the sealing cover 130 is fixed to the base cavity 120 in a detachable manner such as a buckle or a screw, or in an undetachable manner such as welding. The first electrode 310 and the second electrode 320 are fixed in the closed cover 130 and connected to an external detection circuit. The elastic member 340 is generally a spring, an elastic column or an elastic block, etc. The conductive part 331 is a conductive metal part integrally formed or fixedly disposed on the top rod 330, and does not need to be elastically deformed. The cross-sectional shape of the ejector 330 is not limited, and may be a regular or irregular shape such as a circle, a rectangle, or the like. In practical applications, the bottom of the ejector rod 330 abutting against the male plug pipe 210 is set to be a spherical surface or an arc surface, and similarly, the outer wall of the male plug pipe 210 adjacent to the plug port is set to be an arc surface, so as to achieve better fitting installation.

It can be understood that when the male plugging pipe 210 is plugged into the female plugging pipe 110, an opening corresponding to the push rod 330 is formed on the female plugging pipe 110 to realize the pushing action on the push rod 330; when the male insertion pipe 210 is inserted out of the female insertion pipe 110, the push action of the push rod 330 can be directly achieved.

It should be noted that, as the placement postures shown in fig. 3 to fig. 6 are taken as examples, the moving direction of the top rod 330 is described, that is, upward or downward is only a directional word, and the actual moving direction is not limited, and when the placement posture is changed, the actual positional relationship is not changed.

When the male plugging pipe 210 and the female plugging pipe 110 are completely matched, the conductive part 331 slides upwards along with the push rod 330, so that the elastic part 340 is compressed, the conductive part 331 is in contact with the first electrode 310 and the second electrode 320, the first electrode 310 and the second electrode 320 are in short circuit, and the falling-off detection switch 300 is in a closed state; when the male plugging pipe 210 falls off or is not completely adapted to the female plugging pipe 110, the push rod 330 loses the external force generated by plugging the male plugging pipe 210, the conductive part 331 slides downwards along with the push rod 330 under the resilience of the elastic part 340, the first electrode 310 and the second electrode 320 are disconnected, and the falling detection switch 300 is in a disconnected state. So set up, can realize coming off and detect the function.

The pipeline falling detection joint structure 1 provided by the embodiment of the utility model at least has the following technical effects: compared with the prior art, the pipeline falling-off detection joint structure 1 provided by the embodiment of the utility model has the conductive part 331 which is used for being in butt connection with the first electrode 310 and the second electrode 320 on the circumferential outline of the ejector rod 330, and when the male connector 200 is completely adapted to or separated from the female connector 100, the ejector rod 330 is directly in butt connection with the first electrode 310 and the second electrode 320 when approaching or departing from the sealing cover 130, and a metal elastic sheet with deformability is not required to be arranged, so that an effective butt connection relationship can be realized by using the self structure of the ejector rod 330, the first electrode 310 and the second electrode 320 can be accurately conducted, and the accuracy and reliability of a pipeline falling-off detection result are improved.

Referring to fig. 7 and 8, in some possible embodiments, the first electrode 310 and the second electrode 320 are symmetrically disposed, and the lift pin 330 and the elastic member 340 move in the direction of the symmetry axis between the first electrode 310 and the second electrode 320; the first electrode 310 and the second electrode 320 respectively have a first metal spring 311 and a second metal spring 321 which are bent, the conductive portion 331 includes a first conductive block which can be connected to the first metal spring 311 in an abutting manner, and a second conductive block which can be connected to the second metal spring 321 in an abutting manner, or the conductive portion 331 is an annular conductive strip which can be connected to the first metal spring 311 and the second metal spring 321 in an abutting manner. It is understood that the axis of symmetry is the direction connecting the cover 130 and the base cavity 120, i.e., the direction of movement of the lift pins 330.

Specifically, the first metal dome 311 may be integrally formed with the first electrode 310, or may be a two-piece structure, and is fixed together by a later assembly method, as is the second metal dome 321. The shapes formed by the first electrode 310 and the first metal elastic sheet 311, and the second electrode 320 and the second metal elastic sheet 321 can be S-shaped, C-shaped, V-shaped, and the like, and reinforcing ribs can be arranged on the first electrode 310 and the first metal elastic sheet 311, and on the second electrode 320 and the second metal elastic sheet 321, so that the elasticity and the fatigue resistance can be effectively increased. In addition, the first metal elastic sheet 311 and the second metal elastic sheet 321 can increase the contact area with the conductive portion 331, thereby ensuring effective conductivity.

Correspondingly, the conductive portion 331 may include a first conductive block and a second conductive block, or may be an annular conductive strip made of conductive metal.

Referring to fig. 3, 5, 7 and 8, in some possible embodiments, the circumferential profile of the carrier rod 330 is provided with an error-proof rib 332, and the base cavity 120 is provided with a mounting groove 121 engaged with the error-proof rib 332. Specifically, the anti-misalignment rib 332 may be disposed in the middle of the top bar 330, and may move along the mounting groove 121 in the upward or downward movement process of the top bar 330, but is limited by the mounting groove 121 being unable to deflect, so as to effectively prevent the top bar 330 from being stuck such as rotating, misaligned, and inclined when sliding up and down, thereby ensuring that the conductive portion 331 can be accurately contacted with the first metal elastic piece 311 and the second metal elastic piece 321 at the same time.

Referring to fig. 4, 6 to 8, in some possible embodiments, the circumferential profile of the top rod 330 is provided with a limiting step 333, the closed cover 130 is provided with a limiting groove 131, and the elastic element 340 is limited between the limiting step 333 and the limiting groove 131. Specifically, the end of the push rod 330 adjacent to the closed cover 130 is provided with a limit step 333, one end of the elastic member 340 is sleeved on the limit step 333 or clamped in the limit step 333, and the other end of the elastic member 340 is accommodated in the limit groove 131, so that the elastic member 340 is installed and positioned, and the elastic member 340 is prevented from deviating.

Referring to fig. 1, 3, 5, 7 and 8, in some possible embodiments, a first locking groove 334 is formed on a circumferential profile of the top rod 330, and a first sealing ring 335 hermetically and slidably disposed with the base cavity 120 is fitted in the first locking groove 334, so that the accommodating cavity is divided into a first cavity 132 accommodating the first electrode 310 and the second electrode 320 and a second cavity 133 for communicating with the outside. Specifically, the top rod 330 has a first engaging groove 334 at a portion of the conductive portion 331 away from the sealing cover 130, and the first sealing ring 335 is disposed in the first engaging groove 334, so as to ensure that the first electrode 310, the second electrode 320 and the conductive portion 331 are located in the sealed first cavity 132, thereby ensuring the effectiveness of the detection circuit.

Referring to fig. 4 and 6, in some possible embodiments, a second locking groove is formed on an outer wall of the female insertion pipe 110, and a second sealing ring 111 that is in sealing insertion fit with an inner wall of the male insertion pipe 210 is fitted in the second locking groove. In this embodiment, in order to ensure the sealing performance of the female insertion pipe 110 and the male insertion pipe 210, at least one second clamping groove is formed in the outer wall of the female insertion pipe 110, and a second sealing ring 111 is disposed in the second clamping groove, so as to achieve the sealing performance of the inner wall of the male insertion pipe 210 when the outer wall of the female insertion pipe 110 is inserted.

Referring to fig. 1, in some possible embodiments, a third groove 122 is formed on the circumferential profile of the base cavity 120 near the opening end of the sealing cover 130, and a third sealing ring 123 sealed with the sealing cover 130 is fitted in the third groove 122. In this embodiment, the third sealing ring 123 is disposed in the third slot 122, so as to ensure the sealing property between the sealing cover 130 and the base cavity 120 and prevent the detection circuit from invading water vapor, dust, etc.

In the above embodiment, the first seal ring 335, the second seal ring 111, and the third seal ring 123 may be rubber rings.

Referring to fig. 1 to 6, in some possible embodiments, an inner wall of the male insertion pipe 210 may be inserted into an outer wall of the female insertion pipe 110, the female connector 100 further includes a receiving cavity 140 connected to the base cavity 120 and disposed around the female insertion pipe 110, the receiving cavity 140 is provided with a through slot 141 penetrating a wall thickness direction thereof, and an elastic arm 150 for tightly pushing the male insertion pipe 210 is detachably disposed in the through slot 141. It will be appreciated that, in this case, a third sealing ring 123 may be provided on the outer wall of the female insertion pipe 110.

Specifically, the plugging position of the male plugging pipe 210 and the female plugging pipe 110 is in the receiving cavity 140, so as to reduce the external environment interference. The accommodating cavity 140 and the base cavity 120 may be integrally disposed or separately disposed, and jointly surround the circumference of the female plug pipe 110. The wall thickness direction of the accommodating cavity 140 is provided with a through slot 141, and the through slots 141 may be arc-shaped, may be provided intermittently, or may be provided as one integral body. The elastic blocking arm 150 has elastic deformation capacity, can adjust the shape to adapt to male plug-in pipelines 210 with different sizes, and can be tightly clamped on the outer wall of the male plug-in pipeline 210 through the through clamping groove 141, so that the plug-in reliability of the male plug-in pipeline 210 is ensured. The male insertion pipe 210 can be pulled out only by removing the elastic catch arm 150 unless an external force is applied, and the stability of the male insertion pipe 210 is ensured.

Based on the elastic blocking arm 150, referring to fig. 3 to 6, in one embodiment, a tapered boss 211 capable of being in abutting engagement with the ejector rod 330 is disposed on a circumferential profile of the male insertion pipe 210 adjacent to the insertion end thereof, and the tapered boss 211 and the elastic blocking arm 150 are in abutting engagement in the insertion direction. In this embodiment, the tapered boss 211 is convenient for abutting and matching with the ejector rod 330, so that the upward or downward movement is uniform and gradual, and the stability is improved. Meanwhile, the tapered boss 211 and the elastic stopper arm 150 form an abutting relationship, preventing the male insertion pipe 210 from being disengaged.

Referring to fig. 1, in one embodiment, the outer wall of the accommodating cavity 140 is provided with a fixing slot 142, the elastic arm 150 is U-shaped, and two open ends of the elastic arm 150 are provided with bending strips 151 capable of fitting into the fixing slot 142. In this embodiment, the elastic arm 150 is a U-shaped retainer ring, and can be clamped on the outer wall of the male plug pipe 210 by opening both ends. The bending clamping strip 151 is integrally formed by the elastic blocking arm 150, the bending direction of the bending clamping strip is approximately the same as the plugging direction, the bending clamping strip can be limited in the fixed clamping groove 142, and the elastic blocking arm 150 is prevented from falling off in the dismounting process.

Referring to fig. 1, in one embodiment, two sets of limit stops 143 are symmetrically disposed about the through slot 141 on an outer wall of the receiving cavity 140, and the elastic arm 150 is limited in a limit space formed by the two sets of limit stops 143 at a portion outside the receiving cavity 140. Specifically, each set of the limit stops 143 may include one or more limit stops, and the two sets of the limit stops 143 may form a limit space to prevent the elastic blocking arm 150 from deflecting in the plugging direction, thereby reducing the dropping phenomenon.

Referring to fig. 3 to 6, in some possible embodiments, the female connector 100 further includes a heating element 160 engaged with the female plug pipe 110, and a heat dissipation pipe 170 disposed in the female plug pipe 110, wherein the heating element 160 is disposed in communication with the heat dissipation pipe 170. In this embodiment, the heating unit 160 has a heating function, and the heat generated by the heating unit is transmitted to the medium in the female and

male insertion pipes

110 and 210 through the heat pipe 170 in a heat radiation manner, so that the heating function is realized, and the pipe can be effectively prevented from being blocked due to freezing in the pipe.

It is to be understood that, in the foregoing embodiments, various parts may be freely combined or deleted to form different combination embodiments, and details of each combination embodiment are not described herein again, and after this description, it can be considered that each combination embodiment has been described in the present specification, and can support different combination embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The pipeline falling detection joint structure is characterized by comprising a female joint, a male joint and a falling detection switch; wherein the content of the first and second substances,

the female joint comprises a female plug pipeline, a base cavity connected with the female plug pipeline and a sealing cover body in sealing fit with the base cavity, and the base cavity and the sealing cover body jointly form a containing cavity for containing the falling detection switch;

the male connector comprises a male plugging pipeline which can be plugged and matched with the female plugging pipeline;

the falling detection switch comprises a first electrode and a second electrode which are connected with the closed cover body, a push rod which can be in sliding fit with the base cavity, and an elastic piece arranged between the closed cover body and the push rod, wherein one end of the push rod, which is far away from the closed cover body, extends out of the base cavity;

2. The pipeline dropout detection joint structure of claim 1, wherein the first electrode and the second electrode are symmetrically disposed, and the ram and the elastic member move in a direction of a symmetry axis between the first electrode and the second electrode;

the first electrode and the second electrode are respectively provided with a first metal elastic sheet and a second metal elastic sheet which are arranged in a bent mode, the conductive part comprises a first conductive block and a second conductive block, the first conductive block can be connected with the first metal elastic sheet in a butting mode, the second conductive block can be connected with the second metal elastic sheet in a butting mode, or the conductive part is an annular conductive strip, the first metal elastic sheet and the second metal elastic sheet can be connected with the conductive strip in a butting mode.

3. The structure of pipeline drop-off detection joint as claimed in claim 1, wherein the circumferential profile of the top rod is provided with an anti-misalignment rib, and the cavity of the base is provided with a mounting groove matched with the anti-misalignment rib.

4. The structure of claim 1, wherein the ejector pin has a circumferential contour with a limiting step, the sealing cover has a limiting groove, and the elastic member is limited between the limiting step and the limiting groove.

5. The structure of pipeline drop detection joint as claimed in claim 1, wherein the top rod has a circumferential contour formed with a first slot, and the first slot is fitted with a first sealing ring sliding and sealing with the cavity of the base, so that the accommodating cavity is divided into a first cavity for accommodating the first electrode and the second electrode, and a second cavity for communicating with the outside.

6. The structure of pipeline drop detection joint as claimed in claim 1, wherein the outer wall of the female plug pipeline is provided with a second slot, and a second sealing ring is fitted in the second slot and is in sealing engagement with the inner wall of the male plug pipeline.

7. The structure of pipeline drop detection joint as claimed in claim 1 or 6, wherein the inner wall of the male plug pipeline can be plugged into the outer wall of the female plug pipeline, the female joint further comprises a receiving cavity connected to the cavity of the base and disposed around the female plug pipeline, the receiving cavity is provided with a through slot penetrating the wall thickness direction of the receiving cavity, and an elastic arm for tightly pushing the male plug pipeline is detachably disposed in the through slot.

8. The pipe dropout detection joint structure of claim 7, wherein the circumferential profile of the male plug pipe adjacent to the plug end thereof is provided with a tapered boss abuttable to the ejector pin, and the tapered boss abuttable to the elastic arm in the plug direction.

9. The structure of pipeline drop-off detection joint as claimed in claim 7, wherein the outer wall of the receiving cavity has a fixing slot, the elastic arm is U-shaped, and two ends of the opening of the elastic arm have bending strips that can fit into the fixing slot.

10. The structure of claim 7, wherein two sets of limit stops are symmetrically disposed about the through slot on the outer wall of the receiving cavity, and the elastic arm is limited in a limit space formed by the two sets of limit stops at a portion outside the receiving cavity.