A pipeline joint and a sealing mechanism for pipeline sealing detection having the same

Abstract

The present invention relates to the technical field of joint connection, and in particular to a pipe joint and a sealing mechanism for pipe sealing detection having the same. A pipe joint of the present invention comprises: a guide sleeve assembly and a ventilation rod core, wherein the first end of the ventilation rod core is used for sealingly docking with a mating joint, and the second end thereof extends from one end of the guide sleeve assembly into and penetrates the guide sleeve assembly, and at least a sealing assembly is sleeved on the portion of the ventilation rod core disposed in the guide sleeve assembly; when the end of the measured pipeline extends into the guide sleeve assembly from the other end of the guide sleeve assembly, the second end of the ventilation rod core extends into the measured pipeline, and the ventilation rod core can move relative to the guide sleeve assembly in a direction close to the mating joint under the action of an external force to compress the sealing assembly, so that the outer wall of the sealing assembly is sealed against the inner wall of the measured pipeline. In the present invention, the pipe joint can realize rapid installation and disassembly of the joint and the pipeline by adopting a built-in sealing assembly and a movable ventilation rod core, eliminates non-standard rubber blocks, and saves costs.

Description

Technical Field

[0001] The invention relates to the technical field of joint connection, and in particular to a pipeline joint and a sealing mechanism for pipeline sealing detection having the same. Background Art

[0002] At present, when detecting whether there is leakage in the pipeline (knurled copper tube) used in the air conditioner, a non-adjustable joint is used for detection. During the detection process, one end of the copper tube is inserted into the vent joint for inflation, and the other end is blocked with a sealing plug to prevent leakage. The detection device is fixedly connected to the vent joint, resulting in the vent joint being unable to be replaced. In addition, a non-standard customized rubber sleeve is placed on the surface of each vent joint to achieve a sealed connection with the pipeline. Each time the test is performed, the size of the rubber sleeve needs to be changed according to the diameter of the copper tube. When the diameter of the copper tube is small, a thinner rubber sleeve is replaced; when the diameter of the copper tube is large, a thicker rubber sleeve is replaced. The rubber sleeve needs to be pulled off with great force every time it is replaced, which is time-consuming and laborious. In order to maintain good air tightness between the copper tube and the vent joint, the copper tube and the rubber sleeve are interference fit. When the copper tube is inserted and pulled out, the operator needs to exert a lot of effort. At the same time, the cost of the non-standard rubber sleeve is high, which greatly increases the cost of use. Summary of the invention

[0003] The present invention provides a pipeline joint and a sealing mechanism for pipeline sealing detection having the same, which are used to solve at least one of the above technical problems.

[0004] One aspect of the present invention provides a pipe joint, one end of which is used to connect to a pipe to be tested, and the other end of which is used to connect to a mating joint. The pipe joint comprises: a guide sleeve assembly and a vent rod core.

[0005] The first end of the ventilation rod core is used for sealingly docking with the mating joint, and the second end thereof extends from one end of the guide sleeve assembly into and passes through the guide sleeve assembly, and at least a portion of the ventilation rod core disposed in the guide sleeve assembly is sleeved with a sealing assembly;

[0006] When the end of the measured pipeline extends into the guide sleeve assembly from the other end of the guide sleeve assembly, the second end of the ventilation rod core extends into the measured pipeline. Under the action of external force, the ventilation rod core can move relative to the guide sleeve assembly in a direction close to the mating joint to compress the sealing assembly, so that the outer wall of the sealing assembly is sealed against the inner wall of the measured pipeline.

[0007] In one embodiment, the guide sleeve assembly comprises: a catheter and a compression sleeve, the compression sleeve is fixedly inserted in the catheter, the ventilation rod core is movably arranged in the compression sleeve, the second end of the ventilation rod core is provided with a stopper, and the sealing assembly is arranged between the stopper and the end of the compression sleeve located in the catheter;

[0008] Wherein, when the ventilation rod core drives the stopper to move toward the direction approaching the mating joint, the stopper can compress the sealing assembly.

[0009] In one embodiment, the stopper is a locking nut, and the locking nut is in gas communication with the ventilation rod core.

[0010] In one embodiment, at least a portion of the through hole in the catheter for inserting the press sleeve is configured as a cone-shaped structure.

[0011] Another aspect of the present invention also provides a sealing mechanism for pipeline sealing detection, comprising: the above-mentioned pipeline joint and a mating joint that is sealingly connected to the pipeline joint; wherein the pipeline joint is detachably arranged at the end of the pipeline to be tested, and the mating joint is detachably connected to the detection device.

[0012] In one embodiment, the mating connector comprises: a connector body and a locking mechanism disposed on an outer wall of the connector body.

[0013] A valve core is provided in the inner cavity of the joint body, and one end of the joint body adjacent to the pipe joint is an open end, and the open end is sealed and butted with the first end of the ventilation rod core; the locking mechanism is used to lock and fix the ventilation rod core and the joint body;

[0014] When the ventilation rod core is docked with the connector body, the ventilation rod core pushes the valve core to move away from the pipe connector, and the ventilation rod core is connected to the inner cavity of the connector body, and after the connection, the locking mechanism locks and fixes the ventilation rod core and the connector body.

[0015] In one embodiment, the locking mechanism comprises: a locking ball and a ferrule,

[0016] A limiting hole for accommodating the locking ball is provided on the outer wall of the open end of the joint body, and the locking ball is movably arranged in the limiting hole; a slot matching with the locking ball is provided at the first end of the ventilation rod core;

[0017] The ferrule is reciprocatingly sleeved on the open end of the joint body, and the inner wall of the ferrule can contact the locking ball;

[0018] The sleeve can reciprocate in the axial direction to lock the locking ball in the slot or release the locking ball from the slot.

[0019] In one embodiment, the locking mechanism further comprises: a joint housing and a first elastic member,

[0020] The joint shell is movably arranged on the joint body, one end of the joint shell is fixedly connected to the ferrule, and a sealed transmission cavity is arranged between the inner wall of the joint shell and the outer wall of the joint body; the first elastic member is arranged between the ferrule and the joint body;

[0021] Wherein, inputting a medium into the transmission cavity causes the joint housing to drive the ferrule to move in a direction away from the pipe joint, so that the locking ball can be released from the slot;

[0022] The movement of the ferrule in a direction away from the pipe joint can compress the first elastic member, and the ferrule can be reset under the elastic force of the first elastic member and lock the locking ball in the slot.

[0023] In one embodiment, a second elastic member is provided on the valve core.

[0024] Among them, after the ventilation rod core contacts the valve core, the ventilation rod core pushes the valve core to move away from the pipe joint to compress the second elastic member, and the valve core and the ventilation rod core can be reset under the elastic force of the second elastic member.

[0025] In one embodiment, the mating joint further comprises: an elbow, one end of which is detachably sealed and connected to one end of the joint body, and the other end of which is detachably sealed and connected to the detection device;

[0026] A connecting rod is provided on the outer wall of the elbow, and the connecting rod is used to be connected to a driving mechanism, and the driving mechanism is used to drive the matching joint to move so that the ventilation rod core can move towards or away from the matching joint.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) The pipe joint of the present invention adopts a built-in sealing component, and the original structure of the rubber sleeve wrapping the joint is changed into a structure in which a guide sleeve component (outer shell) is combined with a ventilation rod core and a sealing component (movable inner core) thereon. The sealing component can be compressed by pulling the ventilation rod core, thereby sealing and clamping the pipeline to prevent the pipeline from falling off. At the same time, when the ventilation rod core is not tightened, the pipeline to be tested can be easily inserted or pulled out, thereby realizing rapid installation and disassembly of the joint and the pipeline.

[0029] (2) In the present invention, the pipe joint is a replaceable joint assembly. Pipe joints of different models can be replaced according to the diameter of the measured pipe. When dealing with pipes of different sizes, the operation is more convenient and quicker.

[0030] (3) In the present invention, the use of non-standard rubber blocks is eliminated, which can greatly save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Hereinafter, the present invention will be described in more detail based on embodiments and with reference to the accompanying drawings.

[0032] Figure 1 is a schematic structural diagram of a blocking mechanism in one embodiment of the present invention;

[0033] Figure 2 is a schematic structural diagram of a pipe joint in one embodiment of the present invention;

[0034] Figure 3 is a schematic structural diagram of a mating joint in one embodiment of the present invention;

[0035] Figure 4 is a schematic structural diagram of a ventilation rod core in one embodiment of the present invention;

[0036] Figure 5 is a schematic structural diagram of a guide sleeve assembly in one embodiment of the present invention;

[0037] Figure 6 is a schematic structural diagram of a valve core in one embodiment of the present invention;

[0038] Figure 7 is a schematic structural diagram of a joint body in one embodiment of the present invention;

[0039] Figure 8 It is a schematic structural diagram of a ferrule in one embodiment of the present invention;

[0040] Fig. 9 is a schematic structural diagram of a joint housing in one embodiment of the present invention;

[0041] Fig.10 is a schematic structural diagram of an elbow in one embodiment of the present invention;

[0042] Figure 11-17 It is a schematic diagram of the state of the pipe joint of the present invention and the mating joint during the docking process;

[0043] Fig.18 It is a schematic diagram of the state of the pipeline joint of the present invention being sealed and connected to the pipeline to be tested;

[0044] Fig.19 It is a schematic diagram of the state of performing inflation detection of the present invention;

[0045] Fig. 20 It is a schematic diagram of the state of stopping inflation detection of the present invention;

[0046] Figure 21-25 It is a schematic diagram of the state of the pipe joint and the mating joint during the separation process of the present invention.

[0047] Reference numerals:

[0048] 1- pipe joint; 2- matching joint; 3- first connector; 4- second connector; 5- driving mechanism

[0049] 101-ventilation rod core; 102-conduit; 103-pressing sleeve; 104-locking nut; 105-first sealing ring;

[0050] 106-gasket; 107-buffer pad; 108-second sealing ring;

[0051] 1011 - card slot; 1012 - second sealing groove; 1013 - rod core limiting boss;

[0052] 201-connector body; 202-valve core; 203-locking ball; 204-ferrule; 205-connector housing;

[0053] 206-transmission cavity; 207-first elastic member; 208-second elastic member; 209-elbow; 210-hexagon;

[0054] 211-third sealing ring; 212-fourth sealing ring; 213-fifth sealing ring;

[0055] 2011-main body inner boss; 2012-main body outer boss; 2013-third sealing groove; 2014-limiting hole;

[0056] 2015-Installation of step surface;

[0057] 2021-valve port; 2022-installation portion; 2023-guide portion; 2024-valve core boss; 2025-through groove;

[0058] 2026-conducting hole;

[0059] 2041 - ferrule boss; 2051 - fourth sealing groove; 2091 - connecting rod. DETAILED DESCRIPTION

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] One aspect of the present invention provides a pipe joint, wherein one end of the pipe joint 1 is used to be connected to a pipe to be tested, and the other end is used to be connected to a mating joint 2. Figure 2 As shown in the figure, the pipe joint 1 at least includes: a guide sleeve assembly and a ventilation rod core 101. The first end of the ventilation rod core 101 is used for sealing and docking with the mating joint 2, and the second end thereof extends from one end of the guide sleeve assembly into and penetrates the guide sleeve assembly, and at least a sealing assembly is sleeved on the portion of the ventilation rod core 101 disposed in the guide sleeve assembly; when the end of the measured pipeline extends into the guide sleeve assembly from the other end of the guide sleeve assembly, the second end of the ventilation rod core 101 extends into the measured pipeline, and the ventilation rod core 101 can move relative to the guide sleeve assembly in a direction close to the mating joint 2 under the action of an external force to compress the sealing assembly, so that the outer wall of the sealing assembly is sealed against the inner wall of the measured pipeline.

[0062] The pipeline joint of the present invention adopts a built-in sealing component, a guide sleeve component as an outer shell, a ventilation rod core 101 and a sealing component thereon as an inner core, and changes the original structure of the rubber sleeve wrapping the joint into a structure combining an outer shell and a movable inner core. By pulling the ventilation rod core 101, the sealing component can be compressed, thereby sealing and clamping the pipeline to prevent the pipeline from falling off. At the same time, when the ventilation rod core 101 is not tightened, the pipeline to be tested can be easily inserted or pulled out, thereby realizing the rapid installation and removal of the joint and the pipeline.

[0063] In other words, after the sealing assembly is compressed, the radial dimension of the sealing assembly in the measured pipeline increases, thereby clamping the measured pipeline, and the interference fit between the sealing assembly and the pipe wall of the measured pipeline enables the pipe connector 1 to clamp the end of the measured pipeline more firmly, which can better prevent accidents such as the pipeline falling off.

[0064] The pipe joint 1 is a replaceable joint assembly. Different types of pipe joints 1 can be replaced according to the diameter of the measured pipe. When dealing with pipes of different sizes, the operation is more convenient and quick. The use of non-standard rubber blocks is eliminated in the pipe joint 1, which can greatly save production costs.

[0065] It should be noted that the ventilation rod core 101 refers to a rod having a passage inside, and the measured pipeline is connected to the passage.

[0066] The pipeline to be tested in the present invention is not limited to copper pipes, aluminum pipes, etc., but can also be any other pipeline that needs to be leak tested.

[0067] In one embodiment, the sealing assembly includes at least one first sealing ring 105 and at least one gasket 106 , and the first sealing ring 105 and the gasket 106 are alternately arranged on the ventilation rod core 101 .

[0068] The first sealing ring 105 is used to seal and clamp the tested pipeline, and the gasket 106 can make the first sealing ring 105 more compressed, so that the pipeline inserted into the pipeline connector 1 can be clamped more tightly.

[0069] Specifically, Figure 4 As shown in , two first sealing rings 105 and two washers 106 are respectively arranged on the ventilation rod core 101. Among them, the first sealing ring 105 is an O-ring, and the washers 106 are flat washers.

[0070] In one embodiment, Figure 5 As shown in the figure, the guide sleeve assembly includes: a conduit 102 and a pressing sleeve 103, the pressing sleeve 103 is fixedly inserted in the conduit 102, the ventilation rod core 101 is movably arranged in the pressing sleeve 103, the second end of the ventilation rod core 101 is provided with a stopper, and the sealing assembly is arranged between the stopper and the end of the pressing sleeve 103 located in the conduit 102; wherein, when the ventilation rod core 101 drives the stopper to move in a direction close to the mating joint 2, the stopper can compress the sealing assembly.

[0071] Among them, the conduit 102 serves as the outer shell part of the entire pipe joint 1, and the compression sleeve 103 is arranged in the conduit 102. The end of the compression sleeve 103 located in the conduit 102 provides a supporting surface for the sealing assembly, so that when the ventilation rod core 101 moves, the stopper can axially compress the sealing assembly.

[0072] Specifically, the stopper is a locking nut 104, and the locking nut 104 is in gas communication with the ventilation rod core 101. The locking nut 104 is threadedly connected to the second end of the ventilation rod core 101, and is easy to disassemble. After removing the locking nut 104, the sealing assembly can be installed on the ventilation rod core 101.

[0073] In addition, the catheter 102 and the compression sleeve 103 can be fixed together by welding.

[0074] In one embodiment, at least a portion of the through hole in the catheter 102 for inserting the compression sleeve 103 is configured as a cone-shaped structure.

[0075] In other words, the end of the catheter 102 for inserting into the pipeline to be tested is configured to be trumpet-shaped to facilitate the insertion of the pipeline to be tested.

[0076] In one embodiment, a circle of core limiting bosses 1013 is provided on the ventilation core 101 , and the core limiting bosses 1013 are used to limit the ventilation core 101 .

[0077] Further preferably, a buffer pad 107 is provided between the rod core limiting boss 1013 and the pressing sleeve 103, and the buffer pad 107 is arranged on the end surface of the pressing sleeve 103 outside the conduit 102. The buffer pad 107 is used to play a buffering role when the ventilation rod core 101 is reset, thereby protecting the ventilation rod core 101.

[0078] like Figure 1 As shown in the figure, the present invention also provides a sealing mechanism for pipeline sealing detection, comprising: the above-mentioned pipeline joint 1 and a mating joint 2 that is sealingly connected to the pipeline joint 1; wherein the pipeline joint 1 is detachably arranged at the end of the pipeline to be tested, and the mating joint 2 is detachably connected to the detection device.

[0079] In one embodiment, Figure 3 As shown in the figure, the mating connector 2 includes: a connector body 201 and a locking mechanism arranged on the outer wall of the connector body 201, a valve core 202 is arranged in the inner cavity of the connector body 201, the end of the connector body 201 adjacent to the pipe connector 1 is an open end, and the open end of the connector body 201 is sealed and connected to the first end of the ventilation rod core 101; the locking mechanism is used to lock and fix the ventilation rod core 101 and the connector body 201.

[0080] When the ventilation rod core 101 is docked with the connector body 201, the ventilation rod core 101 pushes the valve core 202 to move away from the pipe connector 1, and the pipeline of the ventilation rod core 101 is connected with the inner cavity of the connector body 201. After the connection, the locking mechanism locks and fixes the ventilation rod core 101 and the connector body 201.

[0081] In this embodiment, the open end of the joint body 201 in the mating joint 2 is docked with the first end of the ventilation rod core 101 in the pipe joint 1. After the two are sealed and connected, they can be locked and fixed by a locking mechanism to prevent the joint from falling off.

[0082] Specifically, at least one second sealing groove 1012 for accommodating the second sealing ring 108 is provided on the outer wall of the first end of the ventilation rod core 101, and the first end of the ventilation rod core 101 is sealedly connected to the inner wall of the open end of the joint body 201 through the at least one second sealing ring 108. Figure 4 As shown in FIG. 1 , two second sealing grooves 1012 are disposed at the first end of the ventilation rod core 101 , and a second sealing ring 108 is disposed in each second sealing groove 1012 .

[0083] In one embodiment, the locking mechanism includes: a locking ball 203 and a sleeve 204, a limiting hole 2014 for accommodating the locking ball 203 is provided on the outer wall of the open end of the joint body 201, and the locking ball 203 is movably arranged in the limiting hole 2014; the first end of the ventilation rod core 101 is provided with a slot 1011 matching the locking ball 203; the sleeve 204 can be reciprocatingly slidably sleeved on the open end of the joint body 201, and the inner wall of the sleeve 204 can contact the locking ball 203; wherein, the sleeve 204 can move back and forth along the axial direction to lock the locking ball 203 in the slot 1011 or release the locking ball 203 from the slot 1011.

[0084] In this embodiment, the sleeve 204 slides to insert the locking ball 203 into the slot 1011 on the ventilation rod core 101, and the inner wall of the slot 1011 abuts against the outer wall of the locking ball 203 to lock the locking ball 203, thereby locking and fixing the ventilation rod core 101 and the joint body 201; when the inner wall of the slot 1011 is separated from the outer wall of the locking ball 203, the locking ball 203 can be released, and the lock between the ventilation rod core 101 and the joint body 201 is released. When the ventilation rod core 101 is separated from the joint body 201, the locking ball 203 can be pushed to move radially away from the center of the joint body 201, thereby the locking ball 203 is separated from the slot 1011.

[0085] like Figure 8 As shown in the figure, a sleeve boss 2041 is provided on the inner wall of the sleeve 204, which is used to push the locking ball 203 into the limiting hole 2014 and then into the slot 1011 of the ventilation rod core 101, and lock the locking ball 203; at the same time, after the inner wall of the sleeve boss 2041 is separated from the locking ball 203, a limiting space is formed between the inner wall of the sleeve 204 and the outer wall of the joint body 201, which can accommodate the locking ball 203 released from the limiting hole 2014 and limit it. Preferably, the left side surface of the sleeve boss 2041 is set as an inclined surface, so that the sleeve boss 2041 can push the locking ball 203 into the limiting hole 2014.

[0086] It should be noted that the inner diameter of the above-mentioned limiting hole 2014 is slightly smaller than the diameter of the locking ball 203, so that a part of the locking ball 203 can be exposed from the inner side of the limiting hole 2014 to be inserted into the slot 1011 of the ventilation rod core 101, and it can ensure that the locking ball 203 will not fall from the limiting hole 2014 to the inside of the joint body 201.

[0087] Specifically, the locking ball 203 may be a steel ball.

[0088] In one embodiment, the locking mechanism also includes: a joint shell 205, which is slidably disposed on the joint body 201, one end of the joint shell 205 is fixedly connected to the sleeve 204, and a sealed transmission chamber 206 is provided between the inner wall of the joint shell 205 and the outer wall of the joint body 201; wherein, inputting a medium into the transmission chamber 206 causes the joint shell 205 to drive the sleeve 204 to move away from the pipe joint 1, so that the locking ball 203 can be released from the slot 1011.

[0089] In this embodiment, a sealed transmission chamber 206 is formed between the joint housing 205 and the joint body 201. A medium is input into the transmission chamber 206 through a driving source. Under the action of the pressure of the medium, the joint housing 205 moves away from the pipe joint 1 to enlarge the transmission chamber 206, thereby driving the ferrule 204 to move away from the pipe joint 1.

[0090] In this embodiment, the use of manpower to move the ferrule 204 is avoided. The process is simple and time-saving. The labor intensity of the staff is reduced. At the same time, the requirements for process automation can be met.

[0091] The driving source can be a gas source or a hydraulic source, preferably a gas source. The gas source can provide gas (air) as a medium to be filled into the transmission chamber 206; the hydraulic source can provide hydraulic oil as a medium to be filled into the transmission chamber 206.

[0092] Furthermore, if Figure 7 As shown in , a circle of main body outer boss 2012 is provided on the outer wall of the middle part of the joint main body 201, and a third sealing groove 2013 for accommodating the third sealing ring 211 is provided on the main body outer boss 2012. The main body outer boss 2012 is sealed and connected to the inner wall of the joint housing 205 through the third sealing ring 211; Fig. 9 As shown in , a fourth sealing groove 2051 for accommodating a fourth sealing ring 212 is provided on the inner wall of the end of the joint housing 205 away from the pipe joint 1, and the end of the joint housing 205 is sealed and connected to the outer wall of the joint body 201 through the fourth sealing ring 212. In this way, the transmission cavity 206 is enclosed between the main body outer boss 2012 and the joint housing 205. At the same time, the main body outer boss 2012 also limits the ferrule 204. When the end of the ferrule 204 contacts the main body outer boss 2012, the ferrule 204 cannot continue to slide in the direction away from the pipe joint 1, so that the joint housing 205 cannot continue to move, the transmission cavity 206 cannot be enlarged, and the driving source should stop inputting the medium into the transmission cavity 206.

[0093] Specifically, a first connector 3 is provided on the joint housing 205 , and the driving source is connected to the transmission cavity 206 via the first connector 3 .

[0094] In one embodiment, a first elastic member 207 is provided between the ferrule 204 and the connector body 201, wherein the movement of the ferrule 204 away from the pipe connector 1 can compress the first elastic member 207, and the slot 1011 can be reset under the action of the elastic force of the first elastic member 207 and lock the locking ball 203 in the slot 1011.

[0095] Specifically, Figure 7 As shown in the figure, a circle of mounting step surface 2015 for mounting the first elastic member 207 is provided on the outer wall in the middle of the connector body 201, and the first elastic member 207 is arranged between the ferrule boss 2041 and the mounting step surface 2015. When the ferrule 204 moves away from the pipe connector 1, the ferrule boss 2041 compresses the first elastic member 207.

[0096] In this embodiment, when the pressure of the medium in the transmission chamber 206 is less than the elastic force of the first elastic member 207, the ferrule 204 is reset under the action of the first elastic member 207. This process is simple, time-saving, and reduces the labor intensity of the staff. At the same time, it can meet the requirements of process automation.

[0097] It should be noted that the medium in the transmission cavity 206 can be released or recovered, thereby reducing the pressure exerted by the medium in the transmission cavity 206 on the joint housing 205 .

[0098] In one embodiment, a second elastic member 208 is provided on the valve core 202, wherein after the ventilation rod core 101 contacts the valve core 202, the ventilation rod core 101 pushes the valve core 202 to move away from the pipe connector 1 to compress the second elastic member 208, and the valve core 202 and the ventilation rod core 101 can be reset under the action of the elastic force of the second elastic member 208.

[0099] In this embodiment, when the pipe connector 1 is disengaged from the mating connector 2, the locking mechanism first releases the lock on the ventilation rod core 101, and the ventilation rod core 101 no longer applies pressure to the valve core 202. The valve core 202 can then be reset under the elastic force of the second elastic member 208, and push the ventilation rod core 101 toward the pipe connector 1, thereby disengaging the locking ball 203 of the locking mechanism from the slot 1011 of the ventilation rod core 101 until the valve core 202 returns to its initial position.

[0100] like Figure 3As shown in , the interior of the mating connector 2 has a valve-like structure, wherein an inner boss 2011 is provided on the inner wall of the middle part of the connector body 201, and the inner cavity of the connector body 201 is divided into two parts by the inner boss 2011, wherein the part close to the opening end is the first inner cavity, and the other part is the second inner cavity, and the valve core 202 is arranged in the second inner cavity, and the function of the second inner cavity is similar to the valve cavity of a valve, and the inner boss 2011 of the main body plays a role similar to a valve port.

[0101] like Figure 6 As shown in , the valve core 202 includes a guide portion 2023, a mounting portion 2022 and a valve mouth portion 2021 which are connected in sequence, and a hexagon 210 for supporting the guide portion 2023 is arranged in the second inner cavity of the joint body 201, and the guide portion 2023 is arranged in the hexagon 210; a through groove 2025 is arranged inside the valve mouth portion 2021, and a conducting hole 2026 connected to the through groove 2025 is arranged on the outer wall of the valve mouth portion 2021, and a valve core boss 2024 is arranged on the valve mouth portion 2021 at a position away from the inner boss 2011 of the main body, and the valve core boss 2024 is used to cooperate with the inner boss 2011 of the main body; a second elastic member 208 is arranged on the mounting portion 2022, and the two ends of the second elastic member 208 are respectively against the right side wall adjacent to the hexagon 210 and the valve core boss 2024. The valve port 2021 of the valve core 202 is used to control the conduction between the first inner cavity and the second inner cavity of the connector body 201 , thereby controlling whether the pipeline connector 1 and the mating connector 2 are in conduction.

[0102] In the initial state, the valve core boss 2024 of the valve core 202 contacts the boss 2011 in the main body. At this time, the conducting hole 2026 is blocked by the inner wall of the valve core boss 2024, and the first inner cavity is not connected to the second inner cavity; when the ventilation rod core 101 is docked with the connector body 201, the first end of the ventilation rod core 101 is inserted into the first inner cavity from the open end of the connector body 201, and then the first end of the ventilation rod core 101 pushes the valve core 202 to move away from the pipe connector 1, so that the valve mouth 2021 of the valve core 202 leaves the boss 2011 in the main body, and the pipeline of the ventilation rod core 101 is connected to the second inner cavity through the through groove 2025 and the conducting hole 2026 of the valve core 202.

[0103] Specifically, the first elastic member 207 and the second elastic member 208 are both springs.

[0104] In addition, the hexagonal portion 210 is used to support the end of the valve core 202 without affecting the smooth flow of the port of the joint body 201 .

[0105] In one embodiment, the mating connector 2 further includes an elbow 209, one end of the elbow 209 is detachably sealed and connected to one end of the connector body 201, and the other end of the elbow 209 is detachably sealed and connected to the detection device; Fig.10As shown in , a connecting rod 2091 is provided on the outer wall of the elbow 209, and the connecting rod 2091 is used to be connected to the driving mechanism 5, and the driving mechanism 5 is used to drive the matching joint 2 to move so that the ventilation rod core 101 can move towards or away from the matching joint 2.

[0106] In this embodiment, an elbow 209 is provided to facilitate the connection between the fitting 2 and the detection device, and a connecting rod 2091 is provided on the outer wall of the elbow 209 to facilitate the connection with the driving mechanism 5. The driving mechanism 5 can compress the sealing component on the second end of the ventilation rod core 101 by pulling the ventilation rod core 101, so that the pipe joint 1 is sealed and connected with the tested pipe. The driving mechanism 5 can be a linear motion driving mechanism such as a cylinder or a hydraulic cylinder.

[0107] In addition, one end of the elbow 209 is threadedly connected to one end of the joint body 201, and a fifth sealing ring 213 is arranged between the outer wall of the elbow 209 and the inner wall of the joint body 201, and the elbow 209 is sealed and connected to the joint body 201 through the fifth sealing ring 213; the other end of the elbow 209 is connected to the detection device through the second connector 4, and the second connector 4 is threadedly connected to the end of the elbow 209.

[0108] Example

[0109] The blocking mechanism in this embodiment includes two parts: a pipeline joint 1 arranged at the end of the pipeline to be tested and a matching joint 2 connected to the detection device.

[0110] For ease of explanation, the following Figure 1 The orientation shown in is described as a reference. Among them, the pipeline connector 1 is on the "left" and the matching connector 2 is on the "right".

[0111] The following is a detailed description of the steps of using the pipeline sealing detection plugging mechanism of the present invention to detect whether the pipeline under test has leaks.

[0112] The docking process of the pipe joint 1 and the mating joint 2 is as follows:

[0113] First, if Fig.11 As shown in , before docking, air is ventilated into the cylinder (driving mechanism 5) so that the cylinder (driving mechanism 5) pushes the mating joint 2 to move to the left as a whole.

[0114] Then, if Fig.12As shown in the figure, gas is filled into the transmission chamber 206 through the first connector 3. As the gas is continuously filled, the gas in the transmission chamber 206 increases and the pressure becomes greater. When the pressure is greater than the current elastic force of the first elastic member 207, the joint housing 205 moves to the right. Since the ferrule 204 and the joint housing 205 are threadedly connected, the ferrule 204 also moves to the right. The rightward movement of the ferrule 204 compresses the first elastic member 207, so that the first elastic member 207 generates a greater elastic force.

[0115] Then, if Fig.13 As shown in the figure, the inflation continues through the first connector 3. When the right end of the ferrule 204 collides with the left end of the outer boss 2012 of the main body, the limit position of the movement of the ferrule 204 to the right is reached. At this time, the volume of the transmission chamber 206 is at its maximum, and the first elastic member 207 is further compressed, and the elastic force is further increased. At the same time, due to the rightward movement of the ferrule 204, the ferrule boss 2041 at the left end of the ferrule 204 is located to the right of the locking ball 203, and the locking ball 203 loses the support of the ferrule boss 2041, thereby having space to move along the axial direction away from the connector body 201.

[0116] Next, if Fig.14 As shown in , the first end of the ventilation rod core 101 of the pipe connector 1 can be manually inserted into the open end of the connector body 201 , and as the insertion depth increases, the first end of the ventilation rod core 101 collides with the valve core 202 in the connector body 201 .

[0117] like Fig.15 As shown in , the pipe connector 1 is further inserted, and when the first end of the ventilation rod core 101 hits the boss 2011 in the main body, it stops moving to the right. At the same time, when the first end of the ventilation rod core 101 is inserted to a certain depth, it hits the valve core 202, so that the valve core 202 also moves to the right. The rightward movement of the valve core 202 further compresses the second elastic member 208, so that the second elastic member 208 generates a greater elastic force.

[0118] Then, if Fig.16 As shown in the figure, air begins to leak from the first connector 3, and the pressure in the transmission chamber 206 continues to decrease. When the pressure in the transmission chamber 206 is less than the elastic force of the first elastic member 207, the elastic force of the first elastic member 207 pushes the ferrule 204 and the joint housing 205 to move to the left. When the ferrule 204 moves to the left, it pushes the locking ball 203 to move toward the direction close to the axis of the joint body 201.

[0119] Then, if Fig.17As shown in the figure, after the gas in the transmission chamber 206 is completely exhausted, the elastic force of the first elastic member 207 drives the sleeve 204 and the joint housing 205 to continue to move to the left until the left end of the joint housing 205 collides with the right end of the outer boss 2012 of the main body, and then stops moving to the left. At this time, the joint housing 205 moves to its extreme position of movement to the left, and the sleeve 204 moves to the left while pushing the locking ball 203 to move toward the direction close to the axis of the joint body 201, and the locking ball 203 is inserted into the slot 1011 of the ventilation rod core 101, and the sleeve 204 restricts the locking ball 203 in the slot 1011, thereby achieving the purpose of locking the ventilation rod core 101.

[0120] At this point, the connection between the pipe joint 1 and the mating joint 2 is completed.

[0121] The sealing connection process between the pipe joint 1 and the pipe to be tested is as follows:

[0122] After the connection is completed, Fig.18 As shown in , the cylinder (drive mechanism 5) starts to work to pull the mating joint 2 to move to the right as a whole. The rightward movement of the mating joint 2 drives the ventilation rod core 101 to move to the right. The rightward movement of the ventilation rod core 101 tightens (compresses) the sealing assembly, thereby achieving a sealed connection between the pipe joint 1 and the tested pipe inserted therein, and clamps the tested pipe to prevent it from falling off.

[0123] After the pipe joint 1 and the mating joint 2 are connected, and the pipe joint 1 and the tested pipe are sealed, the tested pipe is inflated and tested. The inflation test process is as follows:

[0124] like Fig.19 As shown in , the detection device fills the second connector 4 with gas, and the gas flows into the connector body 201 through the elbow 209, and then flows into the ventilation rod core 101 and the tested pipeline through the guide hole 2026 of the valve core 202, thereby completing the inflation and leak detection of the tested pipeline.

[0125] like Fig. 20 As shown in , after the inflation detection is completed, the inflation into the second connector 4 is stopped, and the pipe connector 1 begins to separate from the mating connector 2.

[0126] The separation process of the pipe joint 1 and the matching joint 2 is as follows:

[0127] First, if Fig.21 As shown in the figure, the cylinder (driving mechanism 5) works and pushes the joint body 201 to move to the left. The leftward movement of the joint body 201 further pushes the ventilation rod core 101 in the pipe joint 1 to move to the left. The leftward movement of the ventilation rod core 101 makes the sealing component thereon no longer squeezed, thereby no longer clamping the pipe inserted into the pipe joint 1.

[0128] Then, if Fig. 22 As shown in , gas begins to be filled into the first connector 3. As the gas is continuously filled in, the gas in the transmission chamber 206 increases and the pressure becomes greater. When the pressure is greater than the current elastic force of the first elastic member 207, the joint housing 205 moves to the right, and the ferrule 204 also moves to the right. The rightward movement of the ferrule 204 compresses the first elastic member 207, so that the first elastic member 207 generates a greater elastic force.

[0129] Then, if Fig.23 As shown in the figure, the first connector 3 is continuously inflated, and when the right end of the ferrule 204 collides with the left end of the outer boss 2012 of the main body, the limit position of its rightward movement is reached. At this time, the volume of the transmission chamber 206 is at its maximum state, and the first elastic member 207 is further compressed, and the elastic force is further increased. At the same time, due to the rightward movement of the ferrule 204, the ferrule boss 2041 at the left end of the ferrule 204 is located to the right of the locking ball 203, and the locking ball 203 loses the support of the ferrule boss 2041, thereby having space to move in the direction away from the axis of the connector main body 201.

[0130] Then, if Fig.24 As shown in FIG. 2 , under the action of the second elastic member 208 , the valve core 202 pushes the ventilation rod core 101 to move leftward, and the leftward movement of the ventilation rod core 101 pushes the locking ball 203 to move in a direction away from the axis of the joint body 201 .

[0131] Then, if Fig.25 As shown in the figure, the inflation to the first connector 3 stops, and under the action of the second elastic member 208, the valve core 202 and the ventilation rod core 101 continue to move to the left until the valve core 202 moves to the left and returns to its initial position, and then stops moving. At this time, the joint body 201 and the ventilation rod core 101 are unlocked, and the mating joint 2 is pulled to the right by the cylinder (driving mechanism 5), so that the mating joint 2 can be separated from the pipe joint 1. At the same time, under the action of the first elastic member 207, the joint housing 205 and the ferrule 204 move to the left to the initial position.

[0132] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "left", "right", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0133] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealing mechanism for pipeline sealing detection, characterized in that: include: A pipe joint and a mating joint that seals and butts with the pipe joint; One end of the pipe joint is detachably arranged at the end of the measured pipe, and the other end is used to be connected to the mating joint. The pipe joint includes a guide sleeve assembly and a ventilation rod core. The first end of the ventilation rod core is used to seal and dock with the mating joint, and the second end thereof extends from one end of the guide sleeve assembly into and penetrates the guide sleeve assembly, and at least a sealing assembly is sleeved on the portion of the ventilation rod core arranged in the guide sleeve assembly. When the end of the measured pipeline extends into the guide sleeve assembly from the other end of the guide sleeve assembly, the second end of the ventilation rod core extends into the measured pipeline, and the ventilation rod core can move relative to the guide sleeve assembly in a direction close to the mating joint under the action of external force to compress the sealing assembly, so that the outer wall of the sealing assembly is sealed against the inner wall of the measured pipeline; The mating joint is detachably connected to the detection device, and comprises a joint body and a locking mechanism arranged on the outer wall of the joint body. A valve core is arranged in the inner cavity of the joint body, and one end of the joint body adjacent to the pipe joint is an open end, and the open end is sealed and connected with the first end of the ventilation rod core; the locking mechanism is used to lock and fix the ventilation rod core to the joint body; When the ventilation rod core is docked with the connector body, the ventilation rod core pushes the valve core to move away from the pipe connector, and the ventilation rod core is connected to the inner cavity of the connector body, and after the connection, the locking mechanism locks and fixes the ventilation rod core and the connector body.

2. A sealing mechanism for pipeline sealing detection according to claim 1, characterized in that: The guide sleeve assembly comprises: a conduit and a pressing sleeve, wherein the pressing sleeve is fixedly inserted in the conduit, the ventilation rod core is movably arranged in the pressing sleeve, the second end of the ventilation rod core is provided with a stopper, and the sealing assembly is arranged between the stopper and the end of the pressing sleeve located in the conduit; Wherein, when the ventilation rod core drives the stopper to move toward the direction approaching the mating joint, the stopper can compress the sealing assembly.

3. A sealing mechanism for pipeline sealing detection according to claim 2, characterized in that: The stopper is a locking nut, and the locking nut is in gas communication with the ventilation rod core.

4. A sealing mechanism for pipeline sealing detection according to claim 2 or 3, characterized in that: At least a portion of the through hole in the catheter for inserting the pressing sleeve is constructed as a cone structure.

5. A sealing mechanism for pipeline sealing detection according to claim 1, characterized in that: The locking mechanism comprises: a locking ball and a ferrule, A limiting hole for accommodating the locking ball is provided on the outer wall of the open end of the joint body, and the locking ball is movably arranged in the limiting hole; a slot matching with the locking ball is provided at the first end of the ventilation rod core; The ferrule is reciprocatingly sleeved on the open end of the joint body, and the inner wall of the ferrule can contact the locking ball; The sleeve can reciprocate in the axial direction to lock the locking ball in the slot or release the locking ball from the slot.

6. A sealing mechanism for pipeline sealing detection according to claim 5, characterized in that: The locking mechanism further comprises: a joint housing and a first elastic member, The joint shell is movably arranged on the joint body, one end of the joint shell is fixedly connected to the ferrule, and a sealed transmission cavity is arranged between the inner wall of the joint shell and the outer wall of the joint body; the first elastic member is arranged between the ferrule and the joint body; Wherein, inputting a medium into the transmission cavity causes the joint housing to drive the ferrule to move in a direction away from the pipe joint, so that the locking ball can be released from the slot; The movement of the ferrule in a direction away from the pipe joint can compress the first elastic member, and the ferrule can be reset under the elastic force of the first elastic member and lock the locking ball in the slot.

7. A sealing mechanism for pipeline sealing detection according to claim 1 or 5, characterized in that: The valve core is provided with a second elastic member. Among them, after the ventilation rod core contacts the valve core, the ventilation rod core pushes the valve core to move away from the pipe joint to compress the second elastic member, and the valve core and the ventilation rod core can be reset under the elastic force of the second elastic member.

8. A sealing mechanism for pipeline sealing detection according to claim 1 or 5, characterized in that: The mating joint further comprises: an elbow, one end of which is detachably sealed and connected to one end of the joint body, and the other end of which is detachably sealed and connected to the detection device; A connecting rod is provided on the outer wall of the elbow, and the connecting rod is used to be connected to a driving mechanism, and the driving mechanism is used to drive the matching joint to move so that the ventilation rod core can move towards or away from the matching joint.

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