Pipe joint structure

Abstract

This application relates to a pipe connector structure, including a main connector, a movable plug, and a connector. The connector includes an air inlet pipe and a second connecting part. One of the first and second connecting parts is an insert plate, and the other is a slot. An elastic structure is installed on the slot wall and one of the insert plates, while a constraint part is installed on the slot wall and the other of the insert plates to constrain the elastic structure. When the connector is installed on the main connector, the elastic structure is constrained by the constraint part, and the air inlet pipe and the air outlet pipe are inner and outer sleeved and constrained together. When connection to a pipe is required, simply insert the second connecting part of the connector onto the first connecting part on the main connector. Then, the first and second connecting parts, constrained by the elastic structure and the constraint part, allow the connector to be installed on the main connector, connecting and communicating the air inlet pipe and the air outlet pipe. The entire connection process is convenient, quick, and reliable.

Description

Technical Field

[0001] This application relates to the field of connector technology, and in particular to a pipe connector structure. Background Technology

[0002] Air samplers, also known as aspirating smoke detectors or air sampling fire detectors, mainly use air sampling tubes to draw air from the protected area into the air sampler for analysis, thereby providing early warning of fires.

[0003] When the pipe connector of the current air sampler is connected to the pipeline, the pipeline may detach when the gas flow rate is high. Utility Model Content

[0004] Therefore, it is necessary to provide a pipe joint structure that is easy to install and reliable.

[0005] This application provides a pipe fitting structure, including:

[0006] The main connector has a first end for fixed connection with an air sampler, and the interior of the main connector is provided with an air outlet pipe and a flow channel that are sequentially connected along the flow direction of the fluid. The air outlet pipe is fixedly connected to the main connector, and the air outlet of the flow channel is connected to the air sampler. The end face of the second end of the main connector is provided with a first connecting part.

[0007] A movable plug is located in the flow channel. The interior of the movable plug is provided with a flow passage that communicates with the air outlet. The movable plug is arranged to open or close the air inlet of the flow channel. When the air inlet is in the open state, the air inlet is connected to the flow passage.

[0008] The connector includes an air intake pipe and a second connector that plugs into and mates with the first connector. One of the first connector and the second connector is a insert plate, and the other is a slot. An elastic structure is installed on the slot wall and one of the insert plates. A constraint part that can constrain the elastic structure is installed on the slot wall and the other of the insert plates. When the connector is installed in the main connector, the elastic structure and the constraint part are constrained, and the air intake pipe and the air outlet pipe are inner and outer sleeved together and constrained.

[0009] In one embodiment, a flexible sealing ring is fitted around the air outlet pipe. When the connector is in the installed state, the air inlet pipe is fitted around the air outlet pipe, and the sealing ring abuts against the corresponding position of the inner peripheral wall of the air inlet pipe.

[0010] In one embodiment, there are at least two sealing rings, which are arranged at axial intervals along the air passage.

[0011] In one embodiment, the first connecting part is a slot formed on the end face of the main connector, and the second connecting part is a plug plate connected to the air intake pipe.

[0012] In one embodiment, the slot includes an inner groove wall and an outer groove wall arranged sequentially from the inside to the outside along the radial direction of the air passage. The constraint part is an insertion hole opened on the outer groove wall. The elastic structure includes a first elastic element and a locking rod part that is inserted and engaged with the insertion hole. The locking rod part has a tendency to move radially outward along the air passage under the action of the first elastic element.

[0013] In one embodiment, the slot is an annular groove extending circumferentially along the air passage, the insert plate is an annular plate sleeved around the air intake passage, and there are at least two elastic structures arranged at intervals along the circumferential direction of the annular plate, with each elastic structure corresponding to one insertion hole.

[0014] In one embodiment, the insert plate has a receiving groove, the first elastic member is located in the corresponding receiving groove, and the outer wall of the receiving groove has a through hole for at least part of the locking rod to pass through.

[0015] In one embodiment, the connector further includes a baffle, the air intake pipe is disposed on the baffle, and the insert plate is disposed on the side of the baffle facing the flow channel and located on the outer periphery of the air intake pipe.

[0016] In one embodiment, the main connector has a fixing plate located near the first end, and the air outlet is opened on the fixing plate. The connector structure also includes a second elastic element that causes the movable plug to always have a tendency to move in the direction of blocking the air inlet, and the second elastic element acts on the movable plug. In one embodiment, the main connector includes a first connector, an intermediate connector, and a second connector in sequence along its own axial direction. The inner peripheral wall of the first connector has an internal thread that is threaded to the air collector. The flow channel is located in the intermediate connector, and the air outlet pipe is located in the second connector.

[0017] Compared with the prior art, the pipe joint structure provided in this application only requires the second connecting part of the connector to be inserted and mated with the first connecting part on the main connector when it is necessary to connect with the pipe. Then, the first connecting part and the second connecting part are constrained by the elastic structure and the constraint part to make the connector installed on the main connector. At this time, the air inlet pipe and the air outlet pipe are connected and connected. The whole connection process is convenient, quick and reliable. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded perspective view of a pipe connector structure according to an embodiment of this application;

[0020] Figure 2 for Figure 1 A sectional view;

[0021] Figure 3 for Figure 1 A sectional view of the pipe fitting structure in which the intermediate connector is mounted on the main connector;

[0022] Figure 4 for Figure 3 A magnified view of a section at point I;

[0023] Figure 5 This is a schematic diagram of the structure of a connector according to an embodiment of this application;

[0024] Figure 6 for Figure 1 Another sectional view.

[0025] Reference numerals: 1. Main connector; 11. First connector; 12. Intermediate connector; 121. Flow channel; 1211. Air inlet; 13. Second connector; 131. Air outlet pipe; 132. Slot; 133. Inner groove wall; 134. Outer groove wall; 1341. Insertion hole; 14. Sealing ring; 15. Fixing seat; 2. Movable plug; 20. Flow passage; 201. Inlet; 21. Conical end; 3. Connector; 31. Air inlet pipe; 32. Baffle; 33. Insert plate; 331. Receiving groove; 3311. Perforation; 34. Elastic structure; 341. First elastic element; 342. Locking rod; 343. Sliding plate; 4. Fixing plate; 41. Air outlet; 5. Sealing gasket; 6. Second elastic element. Detailed Implementation

[0026] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," "side," "top," "bottom," and similar expressions used in this application's specification are merely for describing various exemplary structural parts and elements of this application. However, their use herein is for illustrative purposes only and is determined based on the exemplary orientations shown in the accompanying drawings, and does not represent the only possible implementation. Since the embodiments disclosed in this application can be arranged in different orientations, these terms indicating orientation are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] It should be noted that "axial arrangement" means that the overall arrangement direction is along the axial direction, including but not limited to axial extension, and may be at an angle to the axial direction.

[0031] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0032] like Figures 1-6As shown, this application discloses a pipe connector structure. The pipe connector structure includes a main connector 1, a movable plug 2, and a connecting head 3. The first end of the main connector 1 is fixedly connected to an air sampler, and the main connector 1 has an air outlet pipe 131 and a flow channel 121 connected sequentially along the fluid flow direction. The air outlet pipe 131 is fixedly connected to the main connector 1, and the air outlet 41 of the flow channel 121 is connected to the air sampler. The movable plug 2 is located in the flow channel 121, and the movable plug 2 has a flow passage 20 connected to the air outlet 41. The movable plug 2 is arranged to open or close the air inlet 1211 of the flow channel 121, and when the air inlet 1211 is open, the air inlet 1211 is connected to the flow passage 20.

[0033] like Figures 1-6 As shown, the connector 3 includes an air intake pipe 31 and a second connecting part. The end face of the second end of the main connector 1 is provided with a first connecting part, and the second connecting part is inserted into the first connecting part. One of the first connecting part and the second connecting part is an insert plate 33, and the other is a slot 132. An elastic structure 34 is installed on the groove wall of the slot 132 and one of the insert plates 33. A constraint part that can constrain the elastic structure 34 is installed on the groove wall and the other of the insert plates 33. When the connector 3 is installed in the main connector 1, the elastic structure 34 is constrained by the constraint part, and the air intake pipe 31 and the air outlet pipe 131 are constrained together by inner and outer fittings.

[0034] Understandably, when it is necessary to connect to the pipeline, it is only necessary to insert the second connecting part of the connector 3 into the first connecting part on the main connector 1. Then, the first connecting part and the second connecting part are constrained by the elastic structure 34 and the constraint part to install the connector 3 on the main connector 1. At this time, the air inlet pipe 31 and the air outlet pipe 131 are connected and connected. The whole connection process is convenient, quick and reliable.

[0035] Furthermore, a flexible sealing ring 14 is fitted around the outer periphery of the aforementioned air duct 131. With the connector 3 in the installed state, the air intake pipe 31 is fitted around the outer periphery of the air duct 131, and the sealing ring 14 abuts against the corresponding position of the inner circumferential wall of the air intake pipe 31. Thus, on the one hand, the sealing ring 14 achieves a sealed connection between the outer circumferential wall of the air duct and the inner circumferential wall of the air intake pipe; on the other hand, it allows the outer circumferential wall of the air duct and the inner circumferential wall of the air intake pipe to abut together, ensuring a reliable connection between the air duct and the air intake pipe, increasing the stability of the connection, achieving an effective sealing effect, and preventing gas leakage during subsequent airflow.

[0036] like Figures 2-4 and Figure 6As shown, there are at least two sealing rings 14, arranged at intervals along the axial direction of the air passage 131. Schematic, there are two sealing rings 14, and when the connector 3 is in the installed state, both sealing rings 14 abut against corresponding positions on the inner circumferential wall of the air intake duct 31. This further ensures a reliable and sealed connection between the outer circumferential wall of the air passage and the inner circumferential wall of the air intake passage.

[0037] In other embodiments, the first connecting part is an insert plate 33 disposed on the end face of the main connector 1, and the second connecting part is a slot 132 connected to the air intake pipe 31. In another embodiment, such as Figures 2-4 and Figure 6 As shown, the first connecting part is a slot 132 formed on the end face of the main connector 1, and the second connecting part is an insert plate 33 connected to the air intake pipe 31. Specifically, in order to limit the insertion depth of the connector 3, the connector 3 also includes a baffle 32, on which the air intake pipe 31 is disposed and extends along the thickness direction of the baffle 32. The insert plate 33 is disposed on the plate surface of the baffle 32 facing the flow channel 121 and is located on the outer periphery of the air intake pipe 31.

[0038] The aforementioned slot 132 includes an inner slot wall 133 and an outer slot wall 134 arranged radially from the inside to the outside along the air passage 131. The restraining part is an insertion hole 1341 formed on the outer slot wall 134. The elastic structure 34 includes a first elastic member 341 and a locking rod part 342 that engages with the insertion hole 1341. Under the action of the first elastic member 341, the locking rod part 342 tends to move radially outward along the air passage 131. Thus, under the action of the first elastic member 341, the locking rod part 342 can move inward and outward, thereby entering the insertion hole 1341 to achieve the connection between the outer slot wall 134 and the insertion plate 33, or disengaging inward from the insertion hole 1341 to release the insertion plate 33 from the restraint of the outer slot wall 134.

[0039] To facilitate the installation of the first elastic element 341, a receiving groove 331 is provided within the insert plate 33. The first elastic element 341 is located within the corresponding receiving groove 331. A through hole 3311 is provided on the outer wall of the receiving groove 331 for at least a portion of the locking rod portion 342 to pass through. Furthermore, a sliding plate 343 extends laterally outward from the peripheral wall of the locking rod portion 342. The sliding plate 343 is located within the receiving groove 331 to prevent the locking rod portion 342 from completely disengaging from the through hole 3311. The presence of the sliding plate 343 increases the stability of the movement of the locking rod portion 342.

[0040] The first elastic element 341 mentioned above can be a first spring or a first leaf spring. In addition, one end of the first elastic element 341 can abut against the side wall of the receiving groove 331, and the other end of the first elastic element 341 can abut against the locking rod portion 342.

[0041] In one embodiment, the slot 132 includes at least two arc-shaped grooves arranged circumferentially along the air passage, each slot 132 corresponding to an insert plate 33, and each insert plate 33 is provided with at least one elastic structure 34. In this embodiment, as Figure 5 and Figure 6 As shown, slot 132 is an annular groove extending circumferentially along the air intake pipe 131, and insert plate 33 is an annular plate sleeved around the outer periphery of the air intake pipe 31. There are at least two elastic structures 34, arranged at intervals along the circumference of the annular plate, and each elastic structure 34 corresponds to one insertion hole 1341. Schematic, there may be two, three, four, or more elastic structures 34. The cooperation of multiple elastic structures 34 with insertion holes 1341 further increases the reliability of the connection between the connector and the main connector.

[0042] During installation, such as Figures 2-4 and Figure 6 As shown, the outer groove wall 134 abuts against the locking rod 342 inward, causing the locking rod 342 to move inward, and the first elastic member 341 is in a compressed state; when the locking rod 342 moves to correspond with the insertion hole 1341, the locking rod 342 moves into the insertion hole 1341 under the action of the first elastic member 341 and is inserted into the insertion hole 1341, thereby realizing a stable connection between the insertion plate 33 and the slot 132, which facilitates subsequent disassembly.

[0043] like Figure 2 , Figure 3 and Figure 6 As shown, the end of the movable plug 2 facing the air inlet 1211 is a conical end 21. When the movable plug 2 is in motion, the conical end 21 opens or blocks the air inlet 1211. The main connector 1 has a fixing plate 4 located near the first end, and the air outlet 41 is opened on the fixing plate 4.

[0044] like Figure 2 , Figure 3 and Figure 6 As shown, the aforementioned pipe connector structure also includes a second elastic element 6 that ensures the movable plug 2 always tends to move in the direction of blocking the air inlet 1211. The second elastic element 6 acts on the movable plug 2. Specifically, the second elastic element 6 is located between the movable plug 2 and the fixed plate 4, and both ends of the second elastic element 6 can respectively abut against the corresponding positions of the movable plug 2 and the fixed plate 4. The aforementioned second elastic element 6 is a second spring or a second leaf spring.

[0045] In this embodiment, the flow passage 20 has at least one inlet 201, which is located on the side wall of the movable plug 2. Specifically, the flow passage 20 has at least two inlets 201, which are arranged at intervals along the circumference of the movable plug 2, and the outlet of the flow passage 20 is located on the end face of the movable plug 2 facing the air outlet 41.

[0046] In addition, such as Figures 2-4 and Figure 6 As shown, the main connector 1 includes a first connector 11, an intermediate connector 12, and a second connector 13 sequentially along its axial direction. The inner circumferential wall of the first connector 11 is provided with an internal thread for threaded connection with the air collector. The flow channel 121 is located inside the intermediate connector 12, and the air outlet pipe 131 is located inside the second connector 13. Specifically, the air outlet pipe 131 is fixed inside the second connector 13 by a fixing seat 15. In addition, an annular sealing gasket 5 is provided inside the first connector 11. When the air collector is threadedly connected to the first connector 11, the side of the air collector facing away from the air outlet 41 abuts against the sealing gasket 5, thereby preventing air leakage.

[0047] When the air collector is connected to the pipeline via the pipe joint structure, when air flows through the second connector 13 into the main connector 1, the air pressure pushes the movable plug 2, causing it to disengage from the air inlet 1211 on the main connector 1. At this time, the air inlet 1211 is open, and the gas flows into the air collector sequentially through the air inlet 1211, the inlet 201 of the flow channel 20, the flow channel 20, and the outlet 41. During this process, the second elastic element 6 is compressed. When the air flow stops, the movable plug 2 resets under the action of the second elastic element 6, causing the conical end 21 to block the air inlet 1211.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A pipe joint structure characterized by comprising: include: The main connector (1) has a first end for fixed connection with an air sampler, and the interior of the main connector (1) is provided with an air outlet pipe (131) and a flow channel (121) connected sequentially along the flow direction of the fluid. The air outlet pipe (131) is fixedly connected to the main connector (1), and the air outlet (41) of the flow channel (121) is connected to the air sampler. The end face of the second end of the main connector (1) is provided with a first connecting part. A movable plug (2) is located in the flow channel (121). The interior of the movable plug (2) is provided with a flow passage (20) that communicates with the air outlet (41). The movable plug (2) is arranged to open or close the air inlet (1211) of the flow channel (121). When the air inlet (1211) is in the open state, the air inlet (1211) communicates with the flow passage (20). The connector (3) includes an air intake pipe (31) and a second connector that is inserted into and cooperates with the first connector. One of the first connector and the second connector is a plate (33) and the other is a slot (132). An elastic structure (34) is installed on the groove wall of the slot (132) and on one of the plates (33). A constraint part that can constrain the elastic structure (34) is installed on the other of the groove wall and the plates (33). When the connector (3) is installed on the main connector (1), the elastic structure (34) and the constraint part are constrained, and the air intake pipe (31) and the air outlet pipe (131) are fitted together and constrained.

2. The pipe joint structure according to claim 1, characterized by The air outlet pipe (131) is fitted with a flexible sealing ring (14). When the connector (3) is in the installation state, the air inlet pipe (31) is fitted around the air outlet pipe (131), and the sealing ring (14) abuts against the corresponding position of the inner peripheral wall of the air inlet pipe (31).

3. The pipe joint structure of claim 2, wherein There are at least two sealing rings (14), which are arranged at axial intervals along the air passage (131).

4. The pipe joint structure according to claim 1, characterized in that, The first connecting part is a slot (132) opened on the end face of the main connector (1), and the second connecting part is a plug plate (33) connected to the air intake pipe (31).

5. The pipe joint structure according to claim 4, characterized in that, The slot (132) includes an inner slot wall (133) and an outer slot wall (134) arranged radially from the inside to the outside along the air passage (131). The constraint part is an insertion hole (1341) opened on the outer slot wall (134). The elastic structure (34) includes a first elastic element (341) and a locking rod part (342) that is inserted and engaged with the insertion hole (1341). Under the action of the first elastic element (341), the locking rod part (342) has a tendency to move radially outward along the air passage (131).

6. The pipe joint structure according to claim 5, characterized in that, The slot (132) is an annular groove extending circumferentially along the air passage (131), the insert plate (33) is an annular plate sleeved around the air intake pipe (31), and there are at least two elastic structures (34) arranged at intervals along the circumference of the annular plate, with each elastic structure (34) corresponding to one insert hole (1341).

7. The pipe joint structure according to claim 5, characterized in that, The insert plate (33) has a receiving groove (331) inside, the first elastic member (341) is located in the corresponding receiving groove (331), and the outer wall of the receiving groove (331) has a through hole (3311) for at least part of the locking rod (342) to pass through.

8. The pipe joint structure according to claim 4, characterized in that, The connector (3) also includes a baffle (32), the air intake pipe (31) is disposed on the baffle (32), and the insert plate (33) is disposed on the side of the baffle (32) facing the flow channel (121) and located on the outer periphery of the air intake pipe (31).

9. The pipe joint structure according to claim 1, characterized in that, The main connector (1) has a fixing plate (4) located near the first end. The air outlet (41) is opened on the fixing plate (4). The pipe connector structure also includes a second elastic element (6) that makes the movable plug (2) always have a tendency to move in the direction of blocking the air inlet (1211). The second elastic element (6) acts on the movable plug (2).

10. The pipe joint structure according to any one of claims 1 to 9, characterized in that, The main connector (1) includes a first connector (11), an intermediate connector (12), and a second connector (13) in sequence along its own axial direction. The inner circumferential wall of the first connector (11) is provided with an internal thread that is threaded to the air collector. The flow channel (121) is located inside the intermediate connector (12), and the air outlet pipe (131) is located inside the second connector (13).

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