CN209762478U

CN209762478U - joint

Info

Publication number: CN209762478U
Application number: CN201822010483.XU
Authority: CN
Inventors: 丁小丰; 马泽民; 姜存华; 林坤
Original assignee: York Wuxi Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Current assignee: York Wuxi Air Conditioning and Refrigeration Co Ltd; Johnson Controls Technology Co
Priority date: 2018-11-30
Filing date: 2018-11-30
Publication date: 2019-12-10
Anticipated expiration: 2028-11-30

Abstract

The application provides a joint, comprising a joint upper part, a joint lower part, an inlet channel and a channel sealing device, wherein the joint upper part is provided with a cavity, and the joint upper part and the joint lower part can be matched in a rotating mode; the inlet channel is arranged between the joint upper part and the joint lower part, and the cavity is communicated with the inlet channel; the channel sealing means can be caused to close and open the inlet channel, thereby closing or opening the joint, by the relative rotational cooperation of the upper part of the joint and the lower part of the joint. The joint can conveniently control the on-off of the pipeline, is easy to be matched with instruments or sensors with various specifications, is not easy to leak, and is suitable for pipelines circulating refrigerants.

Description

joint

Technical Field

The present disclosure relates to connectors, and particularly to a connector capable of controlling a pipeline.

background

The various pressure gauges or sensors used in large numbers on typical industrial pressure vessels or pipelines typically require periodic inspection and recalibration, and disassembly and replacement after a gauge failure. This requires that the lines connecting the meter and the sensor be cut off and sealed when the meter is removed. Accordingly, there is a need for an associated device to conveniently control the make and break of the tubing.

SUMMERY OF THE UTILITY MODEL

To solve the above problems, the present application provides a joint, wherein the joint comprises:

A joint upper portion and a joint lower portion, the joint upper portion having a cavity therein, the joint upper portion and the joint lower portion being rotatably mated;

An inlet passage disposed between the fitting upper portion and the fitting lower portion, the cavity communicating with the inlet passage;

a channel sealing device;

The channel sealing means can be caused to close or open the inlet channel, and thereby the joint, by a relative rotational fit of the upper part of the joint and the lower part of the joint.

in the joint described above, the joint upper part and the joint lower part can be relatively moved by rotating the joint upper part.

The joint as described above, further comprising a joint sealing means provided outside the joint upper portion and contactable with the joint lower portion so that sealing between the joint upper portion and the joint lower portion is possible.

As with the joint described above, the cavity forms a test channel for communicating with a test device.

The joint as described above, the channel sealing device is a sealing ring, the upper portion of the joint is provided with a channel sealing device mounting groove, and the sealing ring is disposed in the channel sealing device mounting groove.

The joint as described above, the joint upper portion has a head portion and a body portion, the head portion is used for connecting a detection device, the joint lower portion has a cavity, and the body portion can be inserted into the cavity of the joint lower portion.

In the above joint, the outer side of the body portion and the inner side of the cavity are respectively provided with mutually-matched threads, so that when the joint upper portion and the joint lower portion are relatively rotated, the joint upper portion can move relative to the joint lower portion along the axial direction of the joint so as to be close to or far from the joint lower portion.

The joint as described above, when the joint upper part moves relative to the joint lower part, the joint upper part moves the passage sealing device, thereby closing or opening the inlet passage.

The joint as described above, said joint lower portion having a limit step against which said inlet passage is closed when said passage sealing means abuts.

the joint as described above, the joint upper portion includes a movable part, and the passage sealing device is disposed on the movable part, and when the joint upper portion rotates relative to the joint lower portion, the movable part can drive the passage sealing device to close or open the inlet passage.

In the joint as described above, the outer side of the movable member is shaped to fit the joint lower portion such that the movable member moves in the axial direction of the joint with respect to the joint lower portion when the joint upper portion rotates with respect to the joint lower portion.

The joint structure that this application provided is simple, and the cost is lower. The joint can conveniently control the on-off of a pipeline, is easy to be matched with instruments or sensors of various specifications, is not easy to leak, and is suitable for tested equipment circulating refrigerants.

drawings

FIG. 1A is a perspective view of a first embodiment of a fitting of the present application;

FIG. 1B is an exploded perspective view of the joint of FIG. 1A;

FIG. 1C is a schematic axial cross-section of the upper portion of the joint of FIG. 1A;

FIG. 1D is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 1A;

FIG. 2A is a schematic axial cross-sectional view of the fitting of FIG. 1A in an open state;

FIG. 2B is a schematic axial cross-sectional view of the fitting of FIG. 1A in a disconnected state;

FIG. 3A is a perspective view of a second embodiment of a fitting of the present application;

FIG. 3B is an exploded perspective view of the joint of FIG. 3A;

FIG. 3C is a schematic axial cross-sectional view of the upper body of the fitting of FIG. 3A;

FIG. 3D is a schematic axial cross-sectional view of the movable member of FIG. 3A;

FIG. 3E is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 3A;

FIG. 4A is a schematic axial cross-sectional view of the fitting of FIG. 3A in an open state;

FIG. 4B is a schematic axial cross-sectional view of the fitting of FIG. 3A in a disconnected state;

FIG. 5A is a perspective view of a third embodiment of a fitting of the present application;

FIG. 5B is an exploded perspective view of the joint of FIG. 5A;

FIG. 5C is a schematic axial cross-section of the upper portion of the joint of FIG. 5A;

FIG. 5D is a schematic axial cross-sectional view of the movable member of FIG. 5A;

FIG. 5E is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 5A;

FIG. 6A is a schematic axial cross-sectional view of the fitting of FIG. 5A in an open state;

FIG. 6B is a schematic axial cross-sectional view of the fitting of FIG. 5A in a disconnected state;

FIG. 7A is a perspective view of a fourth embodiment of a fitting of the present application;

FIG. 7B is an exploded perspective view of the joint of FIG. 7A;

FIG. 7C is a schematic axial cross-section of the upper portion of the joint of FIG. 7A;

FIG. 7D is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 7A;

FIG. 8A is a schematic axial cross-sectional view of the fitting of FIG. 7A in an open state;

FIG. 8B is a schematic axial cross-sectional view of the fitting of FIG. 7A in a disconnected state;

FIG. 9A is a perspective view of a fifth embodiment of a fitting of the present application;

FIG. 9B is an exploded perspective view of the joint of FIG. 9A;

FIG. 9C is a schematic axial cross-section of the upper portion of the fitting of FIG. 9A;

FIG. 9D is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 9A;

FIG. 10A is a schematic axial cross-sectional view of the fitting of FIG. 9A in an open state;

FIG. 10B is a schematic axial cross-sectional view of the fitting of FIG. 9A in a disconnected state;

FIG. 11A is a perspective view of a sixth embodiment of a fitting of the present application;

FIG. 11B is an exploded perspective view of the joint of FIG. 11A;

FIG. 11C is a schematic axial cross-sectional view of the upper portion of the fitting of FIG. 11A;

FIG. 11D is a schematic axial cross-sectional view of the sub-body of the joint of FIG. 11A;

FIG. 11E is a schematic cross-sectional view of the elastic device of FIG. 11A;

FIG. 12A is a schematic axial cross-sectional view of the fitting of FIG. 11A in an open state;

FIG. 12B is a schematic axial cross-sectional view of the fitting of FIG. 11A in a disconnected state;

FIG. 13A is a perspective view of a seventh embodiment of a fitting of the present application;

FIG. 13B is an exploded perspective view of the joint of FIG. 13A;

FIG. 13C is a schematic axial cross-sectional view of the upper body of the fitting of FIG. 13A;

FIG. 13D is a schematic cross-sectional view of the elastic device of FIG. 13A

FIG. 13E is a schematic axial cross-sectional view of the lower portion of the fitting of FIG. 13A;

FIG. 14A is a schematic axial cross-sectional view of the fitting of FIG. 13A in an open state;

Fig. 14B is a schematic axial cross-section of the coupling of fig. 13A in a disconnected state.

Detailed Description

Various embodiments of the present application will now be described with reference to the accompanying drawings, which form a part hereof. It should be understood that although directional terms such as "front," "rear," "upper," "lower," "left," "right," and the like may be used herein to describe various example structural portions and elements of the application, these terms are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the embodiments disclosed herein can be arranged in a variety of orientations, these directional terms are used for purposes of illustration only and are not to be construed as limiting.

Fig. 1A is a perspective view of a first embodiment of a joint of the present application, fig. 1B is an exploded perspective view of the joint of fig. 1A, and fig. 1C and 1D are axial sectional views of an upper part and a lower part of the joint, respectively, for illustrating the structure of the joint.

As shown in fig. 1A and 1B, the joint 100 includes a joint upper part 101 and a joint lower part 102, the joint upper part 101 is partially inserted into the joint lower part 102, and the joint upper part 101 is rotatable with respect to the joint lower part 102. The joint 100 can be opened or closed by relative rotation between the joint upper part 101 and the joint lower part 102. The lower connector part 102 is used for connecting with a device to be tested, and the upper connector part 101 is used for connecting with a detection device, so that the opening and closing of the connector 100 are controlled, and the connection and disconnection between the fluid in the device to be tested and the detection device are controlled. The detection device may be a meter or a sensor, etc., and the device under test may be a pipe or a vessel. The fitting 100 further includes a channel seal 111 and a fitting seal 151.

As shown in fig. 1B and 1C, the joint upper part 101 includes a head part 121 and a body part 122. Where the head portion 121 has an outer diameter greater than the body portion 122, the body portion 122 is able to be inserted into the fitting lower portion 102, while the head portion 121 is blocked by the fitting lower portion 102 from further insertion into the fitting lower portion 102. The head 121 comprises a segment arranged in a prismatic shape, for example a hexagonal prism, for cooperating with a tool to facilitate screwing of the coupling upper part 101 by the tool. A cavity 109 is provided in the upper part 101 of the connector, as well as a sensing device mounting receptacle 119. The detection device mounting cavity 119 is used for mounting a detection device. Cavity 109 is in communication with sensing device mounting volume 119 and cavity 109 can be in communication with a fluid in the device under test to form a sensing channel. The detection means can thus be brought into communication with the fluid in the device under test, thereby detecting a parameter of the fluid in the device under test. The detection device installation cavity 119 is formed by inwardly recessing from the top surface of the joint upper portion 101, and an internal thread is provided on the inner wall of the detection device installation cavity 119 for fitting with the external thread of the detection device, thereby installing the detection device in the joint upper portion 101. The detection device installation cavity 119 may be adaptively configured according to the structure of the detection device, so that the connector 100 is adapted to different types of detection devices.

The body 122 has an upper body segment 131 and a lower body segment 132, wherein the upper body segment 131 is connected to the head 121. The outer wall of the body upper section 131 is provided with an external thread forming a body threaded section 135 for mating with an internal thread in the fitting lower part 102. A groove 138 formed by narrowing inward from the outer side wall is formed above the body threaded section 135, and the groove 138 is used for accommodating a joint sealing device 151. The joint sealing device 151 is a ring made of an elastic material that can be fitted outside the body part 122 and partially accommodated in the groove 138. The lower body section 132 comprises a first section 117 and a second section 113, wherein the first section 117 is connected with the threaded body section 135, and a hole 171 is provided on a sidewall of the first section 117, the hole 171 being in communication with the cavity 109, such that fluid in the device under test can flow from the hole 171 into the cavity 109. The second section 113 includes a support block 114, and the support block 114 is disposed at the bottom of the second section 113. The support block 114 has a plurality of recesses 142 formed by recessing inward from the outer side thereof, the recesses 142 serving to allow the fluid in the device under test to flow therethrough.

The second section 113 further comprises a channel seal mounting groove 115 for mounting the channel seal 111. A channel sealer mounting groove 115 is disposed above the support block 114 and at the junction of the second section 113 and the first section 117. That is, the groove bottom of the channel sealing means mounting groove 115 is formed by narrowing the outer diameter of the second section 113 inward, and the two groove sidewalls of the channel sealing means mounting groove 115 are formed by the bottom surface of the first section 117 and the top surface of the supporting block 114, respectively. The channel seal 111 is a seal ring made of an elastic material and can be fitted in the channel seal installation groove 115 of the second section 113. The outer diameter of the passage sealing means 111 is not greater than the maximum outer diameter of the supporting block 114, so that the passage sealing means 111 can be blocked by the supporting block 114 and cannot fall off downward. Also, the outer diameter of the passage sealing means 111 is greater than the outer diameter of the first section 117 so that at least a portion of the upper outer surface of the passage sealing means 111 is not received in the passage sealing means mounting groove 115, thereby allowing the passage sealing means 111 having elasticity to be pressed by the joint lower part 102 to form a sealing structure.

As shown in fig. 1B and 1D, the connector lower portion 102 includes a top portion 125 and a bottom portion 126, and the bottom portion 126 is capable of being connected to a device under test, for example, an external thread is provided on the outside of the bottom portion 126 for mating with an internal thread in the device under test to connect the connector 100 to the device under test. The top portion 125 includes a segment, such as a hexagonal prism, configured to facilitate engagement with a tool to facilitate threading of the sub-portion 102 with the tool. The lower joint part 102 has a receptacle 141 extending through the lower joint part 102 in the axial direction, which receptacle 141 is capable of receiving the upper joint part 101 and is in communication with the fluid in the device under test. When the connector upper part 101 is inserted into the connector lower part 102, the body part 122 is located in the receptacle 141, while the head part 121 can be blocked by the top part 125, so that the connector upper part 101 cannot be inserted further into the interior of the connector lower part 102.

Chamber 141 has a front chamber section 161 and a rear chamber section 162, the inner wall of front chamber section 161 containing a smooth section 165 and a threaded chamber section 166, smooth section 165 being disposed above threaded chamber section 166. The cavity thread segments 166 cooperate with the body thread segments 135 of the body 122 such that the coupling upper part 101 and the coupling lower part 102 can be relatively moved in the axial direction of the coupling 100 by being rotated relative to each other by the thread cooperation. Smooth section 165 is configured to mate with joint seal 151, and joint seal 151 is in contact with smooth section 165 to form a seal such that fluid cannot leak from the gap between joint upper portion 101 and joint lower portion 102 when joint upper portion 101 and joint lower portion 102 are rotated relative to each other.

The rear chamber section 162 can form an inlet passage 280 (see fig. 2A and 2B) with the lower body section 132, and the inlet passage 280 can be opened and closed by relative movement of the upper fitting part 101 and the lower fitting part 102. Specifically, the rear chamber section 162 includes a first section 167 and a second section 168, wherein the second section 168 is configured to receive the support block 114 such that the support block 114 can move up and down within the second section 168. At the junction of first segment 167 and second segment 168, the inner diameter of first segment 167 is smaller than the inner diameter of second segment 168 to form a retention step 175, and retention step 175 is adapted to cooperate with channel seal 111.

Fig. 2A and 2B are schematic cross-sectional views of the joint 100 in open and closed states, respectively, and fig. 2A shows the open state of the joint 100. As shown in fig. 2A, an inlet passage 280 is formed between the rear chamber section 162 of the lower fitting portion 102 and the lower body section 132 of the upper fitting portion 101. When fitting 100 is in the open state, channel seal 111 does not contact stop step 175 of fitting lower portion 102, but rather has a gap with stop step 175 of fitting lower portion 102, thereby allowing inlet channel 280 to open. When inlet passage 280 of fitting 100 is open, fluid flows from the device under test through the space between recess 142 of support block 114 and the side wall of back chamber section 162 of fitting lower portion 102, into the space between passage seal 111 and the side wall of back chamber section 162, through the space between passage seal 111 and stop step 175, and through hole 171 in body portion 122 of fitting upper portion 101 into cavity 109 in the direction indicated by arrow 285 so that fluid can communicate with the detection device attached to fitting upper portion 101.

fig. 2B shows the closed state of the joint 100. When the joint 100 needs to be closed, the joint upper part 101 is rotated relative to the joint lower part 102, by the cooperation of the threads between the joint upper part 101 and the joint lower part 102, so that the joint upper part 101 is moved away from the joint lower part 102 until the most distal position relative to the joint lower part 102 is reached, i.e. the position shown in fig. 2B. At this time, the channel sealing device 111 is driven by the joint upper part 101 to move upwards until abutting against the limiting step 175 of the joint lower part 102, and the channel sealing device 111 can be slightly deformed by the extrusion of the limiting step 175, so that the channel sealing device 111 and the limiting step 175 of the joint lower part 102 form a sealing structure, the inlet channel 180 is closed, and fluid cannot enter the cavity 109, so that the joint 100 is closed.

the joint 100 can be switched between an open state shown in fig. 1A and a closed state shown in fig. 1B by bringing the joint upper portion 101 closer to or away from the joint lower portion 102 by the rotational engagement of the screw threads between the joint upper portion 101 and the joint lower portion 102. When the joint upper part 101 of the joint 100 rotates relative to the joint lower part 102, the joint sealing device 151 is always in contact with the smooth section 165 of the joint lower part 102, and the joint sealing device 151 is slightly deformed by the pressing of the smooth section 165 to form a seal, so that fluid cannot flow out from the gap between the threads to the outside of the joint 100.

the connector 100 is used to open and close the device under test when the test device is disassembled. The upper connector part 101 can be provided with an adaptive connecting structure according to the detection device to be connected, and the lower connector part 102 can be provided with a corresponding connecting structure according to the device to be detected to be connected. The joint 100 is compact and simple and can be adapted to a small space. Due to the sealing action of the joint sealing device 151, leakage is less likely to occur when opening and closing the joint 100, thereby preventing fluid from entering the external environment. When the fluid in the tested device is the refrigerant, the frosting phenomenon caused by the heat exchange between the refrigerant leakage and the external environment can be improved to a certain extent.

fig. 3 is a second embodiment of the joint of the present application. The joint 300 of the second embodiment is similar to the joint 100 shown in fig. 1A and 1B, except that when the joint upper part 301 of the joint 300 is rotated relative to the joint lower part 302 to open or close the joint 300, the body portion of the joint upper part 301 is no longer moved up or down relative to the joint lower part 302, but the joint 300 is opened or closed by the up or down movement of the movable member 310.

fig. 3A and 3B are a perspective view and an exploded schematic view of the joint 300, respectively. As shown in fig. 3A and 3B, the joint 300 includes a joint upper portion 301 and a joint lower portion 302, wherein the joint upper portion 301 includes a joint upper body 318, and a movable member 310, and the movable member 310 can be fitted over the joint upper body 318. The fitting upper body 318 is partially inserted into the fitting lower 302, and the fitting upper body 318 is rotatable relative to the fitting lower 302. By the relative rotation between the joint upper body 318 and the joint lower portion 302, the movable member 310 moves up and down with respect to the joint lower portion 302, so that the joint 300 can be opened or closed. The lower connector part 302 is used for connecting with the device to be tested, and the upper connector body 318 is used for connecting with the detection device, so that the opening and closing of the connector 300 are controlled, and the connection and disconnection between the fluid in the device to be tested and the detection device are controlled. The detection means may be a meter or a sensor or the like. The fitting 300 further includes a channel seal 311 and a fitting seal 351.

Fig. 3C is an axial cross-sectional view of the fitting upper body 318. as shown in fig. 3B and 3C, the fitting upper body 318 includes a head 321 and a body 322, wherein the head 321 has an outer diameter greater than that of the body 322, the body 322 is capable of being inserted into the fitting lower 302, and the head 321 is blocked by the fitting lower 302 and cannot be inserted further into the fitting lower 302. The head 321 includes a segment configured in a prismatic shape, such as a hexagonal prism, for mating with a tool to facilitate threading of the sub upper body 318 by the tool. A cavity 309 is provided in the upper body 318 of the fitting, and a detection means mounting receptacle 319, the detection means mounting receptacle 319 being for mounting a detection means. Cavity 309 is in communication with detection device mounting volume 319 and cavity 309 is capable of being in communication with a fluid in a device under test to form a detection channel such that the detection device is capable of being in communication with the fluid in the device under test to thereby detect a parameter of the fluid in the device under test. Detection device mounting receptacle 319 is formed recessed inwardly from the top surface of fitting upper body 318, and internal threads are provided on the inner wall of detection device mounting receptacle 319 for mating with external threads of a detection device to mount the detection device in fitting upper body 318. Wherein the detection device mounting receptacle 319 can be adaptively configured according to the structure of the detection device, facilitating the fitting 300 to accommodate different types of detection devices.

The exterior wall of the body portion 322 is provided with at least one external thread to form a body portion thread segment 335 for mating with the movable member 310. The body threaded segment 335 has a plurality of apertures 371 in a sidewall thereof to allow fluid to enter the cavity 309 from the apertures 371. The body threaded section 335 has a groove 338 formed thereon narrowing inward from the outside, and the groove 338 is adapted to receive the joint sealing device 351. The joint sealing means 351 is a sealing ring made of an elastic material, able to be fitted outside the body 322 and partially housed in the groove 338. The body threaded section 335 has two ends respectively provided with a limiting portion 373, 374 formed by expanding the outer diameter, and the limiting portion 373 is used for limiting the joint upper body 318 to be released from the joint lower portion 302. The stopper 374 restricts the downward movement distance of the movable member 310, and prevents the movable member 310 from falling off from the joint upper body 318. The position-limiting portions 373, 374 are detachably disposed to facilitate the installation of the joint upper body 318 and the movable member 310.

fig. 3D is an axial sectional view of the movable member 310, and as shown in fig. 3B and 3D, the movable member 310 has a through hole 313, and an inner wall of the hole 313 is provided with an internal thread for cooperating with an external thread of the body threaded section 335, so that when the movable member 310 is fitted over the joint upper body 318, the movable member 310 can move up and down with respect to the joint upper body 318 by rotating with respect to the joint upper body 318. The movable member 310 is provided with a passage sealing means mounting groove 315 formed to be inwardly recessed from the top surface for mounting the passage sealing means 311. The passage sealing means 311 is a seal ring made of an elastic material. When the passage sealing means 311 is mounted in the passage sealing means mounting groove 315, the height of the passage sealing means 311 is higher than that of the top surface of the movable member. The movable member 310 is hexagonal prism shaped and is configured to cooperate with the sub-assembly 302 to limit rotation of the movable member 310 relative to the sub-assembly 302. Of course, the outer side of the movable member 310 may be provided with other shapes as long as the movable member 310 can be matched with the joint lower part 302 to limit the rotation of the movable member 310 relative to the joint lower part 302.

As shown in fig. 3B and 3E, the lower connector portion 302 includes a top portion 325 and a bottom portion 326, the bottom portion 326 being capable of being connected to a device under test. For example, external threads may be provided on the outside of the base 326 for mating with internal threads in the device under test to attach the fitting 300 to the device under test. The tip 325 includes a segment therein that is arranged in a prismatic shape, such as a hexagonal prism, to facilitate engagement with a tool to facilitate threading by the tool. The lower connector part 302 has a receptacle 341 extending therethrough in the axial direction, the receptacle 341 being capable of receiving the upper connector body 318 and being capable of communicating with a fluid in a device under test. When the fitting upper body 318 is inserted into the fitting lower 302, the body 322 is located in the receptacle 341, while the head 321 can be blocked by the top 325 so that the fitting upper body 318 cannot be inserted further into the interior of the fitting lower 302.

The receptacle 341 has a receptacle front section 361 and a receptacle rear section 362, and at the junction of the receptacle front section 361 and the receptacle rear section 362, a first limit step 364 is formed for limiting the detachment of the connector upper body 318 from the connector lower portion 302 because the receptacle front section 361 has a smaller inner diameter than the second section 362. The rear receptacle section 362 includes a first section 367 and a second section 368, where the first section 367 and the second section 368 are joined, the first section 367 having an inner diameter smaller than the inner diameter of the second section 368, thereby forming a second retention step 375, the retention step 375 for engaging the channel seal assembly 311. The second section 368 is adapted to receive the movable member 310 such that the movable member 310 can move up and down in the second section 368. The second section 368 is shaped to match the shape of the outside of the movable member 310 such that the movable member 310 cannot rotate relative to the joint lower portion 302 when the movable member 310 is received in the second section 368. In the first embodiment of the present application, the rear cavity section 368 is hexagonal prism shaped. Of course, the second section 368 may have other shapes, and only need to match the shape of the outside of the movable member 310, so that the movable member 310 cannot rotate relative to the joint lower portion 302.

fig. 4A and 4B are schematic cross-sectional views of the joint 300 in the opened and closed states, respectively, and fig. 4A shows the opened state of the joint 300. In this embodiment, the joint upper body 318 and the joint lower 302 are always in the closest position, and the movable member 310 moves up and down with respect to the joint lower 302. As shown in fig. 4A, the rear cavity section 362 of the lower fitting portion 302 forms an inlet passage 480 with the upper fitting portion 301. When the fitting 300 is in the open state, the inlet passage 480 is open, there is a gap between the passage sealing means 311 and the second stop step 375, and fluid flows from the device under test through the space between the side wall of the movable part 310 and the wall of the rear chamber section 362 of the fitting lower part 302, through the space between the passage sealing means 311 and the second stop step 375, through the aperture 371 of the fitting upper body 318 and into the cavity 309, in the direction indicated by arrow 485, so that fluid can communicate with the detection means connected to the fitting upper body 318.

fig. 4B shows the connector 300 in a closed state, when the connector 300 needs to be closed, the connector upper body 318 rotates relative to the connector lower body 302, and at this time, the hexagonal prism-shaped movable member 310 mounted on the connector upper body 318 is limited by the hexagonal prism-shaped cavity rear section 368 of the connector lower body 302 and cannot rotate relative to the connector lower body 302. Because the rotational movement of the movable member 310 is limited, as the fitting upper body 318 rotates, the movable member 310, which is in threaded engagement with the fitting upper body 318, moves upwardly relative to the fitting lower 302 until the position shown in FIG. 4B. At this time, the channel sealing device 311 is driven by the movable component 310 to move along the axial direction of the joint 300 until abutting against the second limiting step 375, and the channel sealing device 311 can be slightly deformed by the extrusion of the second limiting step 375, so that the channel sealing device 311 and the second limiting step 375 form a sealing structure, the inlet channel 480 is closed, the fluid cannot enter the cavity 309, and the joint 300 is closed.

The joint 200 can be switched between the open state shown in fig. 3A and the closed state shown in fig. 3B by rotating the joint upper portion 101 and the joint lower portion 102 to move the movable member 310 closer to or away from the joint lower portion 102. When the joint upper part 301 of the joint 300 rotates relative to the joint lower part 302, the joint sealing device 351 is always in contact with the cavity front section 361 of the joint lower part 302 to form a seal, so that fluid cannot flow out of the joint 300 from the gap between the threads.

The joint 300 has the same advantages as the joint 100, and the joint 300 is more compact than the joint 100, and is more suitable for a narrow installation space.

Fig. 5 is a third embodiment of the present application, and provides an alternative fitting 500, the fitting 500 being similar to the fitting 300 shown in fig. 3A and 3B, except that a portion of the movable member 510 is inserted within the fitting upper body 518.

Fig. 5A and 5B are a perspective view and an exploded perspective view of a joint 500, respectively, as shown in fig. 5A and 5B, the joint 500 includes a joint upper portion 501 and a joint lower portion 502, wherein the joint upper portion 501 includes a joint upper body 518 and a movable member 510. The movable member 510 can be partially threaded into the interior of the fitting upper body 518. The fitting upper body 518 is partially inserted into the fitting lower 502, and the fitting upper body 518 is rotatable relative to the fitting lower 502. The movable member 510 moves up and down with respect to the joint lower portion 502 by relative rotation between the joint upper body 518 and the joint lower portion 502, so that the joint 500 can be opened or closed. The lower connector part 502 is used for connecting with the device under test, and the upper connector body 518 is used for connecting with the detection device, so that the opening and closing of the connector 500 are controlled, and the connection and disconnection between the fluid in the device under test and the detection device are controlled. The detection means may be a meter or a sensor or the like. Fitting 500 also includes a channel seal 511 and a fitting seal 551.

Fig. 5C is a schematic axial cross-sectional view of the fitting upper body 518. as shown in fig. 5B and 5C, the fitting upper body 518 includes a head 521 and a body 522, wherein the head 521 has an outer diameter greater than the body 522, the head 521 can be inserted into the fitting lower 502, and the body 522 is blocked by the fitting lower 502 and cannot be inserted further into the fitting lower 502. The head 521 includes a segment that is configured in a prismatic shape, such as a hexagonal prism, for mating with a tool to facilitate turning the tool about the nipple upper body 518. A cavity 509 is provided in the connector upper body 518, as well as a detection device mounting cavity 519, the detection device mounting cavity 519 being for mounting a detection device. Cavity 509 is in communication with detection device mounting cavity 519 and cavity 509 is capable of being in communication with a fluid in the device under test to form a detection channel such that the detection device is capable of being in communication with the fluid in the device under test to thereby detect a parameter of the fluid in the device under test. Detection device mounting cavity 519 is formed by an inward recess from the top surface of fitting upper body 518, and an internal thread is provided on the inner wall of detection device mounting cavity 519 for mating with the external thread of a detection device, thereby mounting the detection device in fitting upper body 518. The detection device installation cavity 519 can be configured adaptively according to the structure of the detection device, so that the connector 500 can adapt to different types of detection devices.

the body 522 is connected to the head 321, and a plurality of holes 571 are provided in the side wall of the body 522, the holes 571 being in communication with the cavity 509 such that fluid can enter the cavity 309 from the holes 571. The body portion 522 is provided with a groove 538 formed by narrowing from the outside inward, the groove 538 being used to mount the splice seal 551. The slot 538 is provided in the upper portion of the body portion 522, i.e., adjacent the head portion 521. The joint seal 351 is a seal ring made of an elastomeric material that can be fitted over the body portion 322 and partially received in the channel 338. A stopper portion 573 formed by expanding the outer diameter is provided on the outer side of the body portion 522, and the stopper portion 573 is used to restrict the joint upper body 518 from coming out from above the joint lower portion 502. Wherein the limit 573 is configured to be removable to facilitate installation of the header upper body 518.

The body portion 522 is recessed inwardly from a bottom surface to form a movable member cavity 558. the movable member cavity 558 is internally threaded on a wall thereof for mating with the movable member 510. The movable member cavity 558 is located below the cavity 509 and does not communicate with the cavity 509.

Fig. 5D is an axial cross-sectional view of the movable member 510. as shown in fig. 5B and 5D, the movable member 510 has a threaded post 548, and a support block 514 fitted over the lower end of the threaded post 548. Wherein the outer side of the threaded post 548 is provided with an external thread such that the threaded post 548 can mate with the internal thread of the movable member receptacle 558 and be screwed into the movable member receptacle 558. The supporting block 514 is provided with a passage sealing means mounting groove 515 formed by being depressed inward from the top surface for mounting the passage sealing means 511. The passage sealing means 511 is a seal ring made of an elastic material. When the passage sealing means 511 is placed in the passage sealing means mounting groove 515, the passage sealing means 511 is higher than the top surface of the supporting block 514. The outer side of the supporting block 514 is formed in a hexagonal prism shape for cooperating with the lower connector portion 502 to restrict the movable member 510 from rotating with respect to the lower connector portion 502. Of course, the outer side of the movable member 510 may be provided with other shapes as long as the movable member 510 can be matched with the joint lower part 502 to limit the rotation of the joint lower part.

Fig. 5E is an axial cross-sectional view of the connector lower portion 502. as shown in fig. 5B and 5E, the connector lower portion 502 includes a top portion 525 and a bottom portion 526. the bottom portion 526 can be connected to the device under test, for example, by providing external threads on the outside of the bottom portion 526 for mating with internal threads in the device under test to connect the connector 500 to the device under test. The top portion 525 includes a segment, e.g., a hexagonal prism, configured in a prismatic shape to facilitate engagement with a tool to facilitate threading by the tool. The lower connector part 502 has a cavity 541 running through in the axial direction, which cavity 541 can accommodate the upper connector part 501 and can be in communication with the fluid in the device under test. When the connector upper body 518 is inserted into the connector lower portion 502, the body portion 522 is positioned in the cavity 541 and the head portion 521 can be blocked by the top portion 525 such that the connector upper body 518 cannot continue to be inserted into the interior of the connector lower portion 502.

the cavity 541 has a cavity front section 561 and a cavity rear section 562, and at the connection between the cavity front section 561 and the cavity rear section 562, a first limit step 564 is formed because the inner diameter of the cavity front section 561 is smaller than the inner diameter of the cavity rear section 562. The first restraint 564 is configured to restrain the connector upper body 518 from falling out of the upper portion of the connector lower portion 502.

Specifically, the rear plenum section 562 includes a first section 567 and a second section 568, the first section 567 having an inner diameter less than the inner diameter of the second section 568 at the junction of the first section 567 and the second section 568 to form a second limit step 575, the second limit step 575 for engagement with the passage seal 511. The second section 568 is capable of receiving the movable member 510 such that the movable member 510 is capable of moving up and down within the second section 568. The second section 568 is shaped as a hexagonal prism and matches the shape of the outside of the movable member 510 so that the movable member 510 cannot rotate relative to the lower connector part 502 when the movable member 510 moves up and down in the rear cavity section 568. Of course, the rear receptacle section 568 may be shaped otherwise, so long as the movable member 510 cannot rotate relative to the lower connector portion 502. The lower portion of the second section 568 is further provided with a projection 598 formed to extend inwardly from the inner wall of the second section 568, the projection 598 serving to limit the distance the movable member 510 moves downwardly, preventing the movable member 510 from falling out of the joint upper body 518.

Fig. 6A and 6B are schematic cross-sectional views of the joint 500 in the opened and closed states, respectively, and fig. 6A shows the opened state of the joint 500. In this embodiment, the joint upper body 518 and the joint lower 502 are always in the closest position, with the movable member 510 moving up and down relative to the joint lower 502. As shown in fig. 6A, an inlet channel 680 is formed between the cavity rear section 562 of the joint lower part 502 and the joint upper part 501, when the joint 500 is in an open state, the inlet channel 680 is opened, and the channel sealing device 511 has a gap with the limit step 575. Fluid flows from the device under test through the space between the sidewall of the movable member 510 and the wall of the back section 562 of the receptacle of the lower connector portion 502, through the space between the channel seal 511 and the retaining step 575, and through the hole 571 in the upper connector body 518 into the cavity 509 in the direction indicated by arrow 685, so that fluid can communicate with the detection device attached to the upper connector body 518.

Fig. 6B shows the connector 500 in a closed state, when the connector 500 needs to be disconnected, the connector upper body 518 is rotated relative to the connector lower body 502, and at this time, the hexagonal prism-shaped movable member 510 disposed on the body 518 is limited by the hexagonal prism-shaped cavity rear section 568 of the connector lower body 502, and cannot rotate relative to the connector lower body 502. At the same time, the movable member 510 and the joint upper body 518 are threadedly engaged such that the movable member 510 moves upward relative to the joint lower body 502 along the axial direction of the joint 500, up to the position shown in fig. 6B. The channel sealing device 511 is driven by the movable part 510 to move until abutting against the second limiting step 575, and the channel sealing device 511 is slightly deformed by the extrusion of the second limiting step 575, so that the channel sealing device 511 and the limiting step 575 form a sealing structure. At this point, the inlet passageway 680 is closed so that fluid cannot enter the cavity 509. The junction 500 is closed.

the joint 500 is configured to be capable of switching between an open state shown in fig. 6A and a closed state shown in fig. 6B by rotating the joint upper portion 501 and the joint lower portion 502 to move the movable member 510 closer to or away from the joint lower portion 502. When the joint upper part 501 of the joint 500 is rotated relative to the joint lower part 502, the joint sealing means 551 is always in contact with the housing front section 561 of the joint lower part 502 and is slightly deformed by being pressed by the housing front section 561, thereby forming a sealing structure so that fluid cannot flow out from the gap between the threads to the outside of the joint 500.

The joint 500 has the same advantages as the joint 300, and can achieve the technical effects of the joint 300.

fig. 7A is a fourth embodiment of the present application, providing another fitting 700, the fitting 700 being similar to the fitting 100 shown in fig. 1A and 1B, except that a sealing device 711 is provided inside the upper fitting part 701.

Fig. 7A is a perspective view of a first embodiment of the joint of the present application, fig. 7B is an exploded perspective view of the joint in fig. 7A, and fig. 7C and 7D are axial sectional views of a joint upper portion and a joint lower portion, respectively, for illustrating the structure of the joint, and as shown in fig. 7A and 7B, a joint 700 includes a joint upper portion 701 and a joint lower portion 702, the joint upper portion 701 is partially inserted into the joint lower portion 702, and the joint upper portion 701 is rotatable with respect to the joint lower portion 702. The joint 700 can be opened or closed by relative rotation between the joint upper part 701 and the joint lower part 702. The lower part 702 of the connector is used for connecting with the device under test, and the upper part 701 of the connector is used for connecting with the detection device, so that the opening and closing of the connector 700 are controlled to control the connection and disconnection between the fluid in the device under test and the detection device. The detection means may be a meter or a sensor or the like. Fitting 700 also includes a channel seal 711 and a fitting seal 751.

As shown in fig. 7B and 7C, the fitting upper portion 701 includes a head portion 721 and a body portion 722, wherein the head portion 721 has an outer diameter greater than that of the body portion 722, the head portion 721 is insertable into the fitting lower portion 702, and the body portion 722 is blocked by the fitting lower portion 702 and cannot be inserted further into the fitting lower portion 702. The head 721 includes a segment, which is arranged in a prism shape, such as a hexagonal prism, for cooperating with a tool to facilitate screwing of the tool. A cavity 709 and a detection device installation cavity 719 are formed in the joint upper part 701, and the detection device installation cavity 719 is used for installing a detection device. Cavity 709 is in communication with sensing device mounting cavity 719 and cavity 709 is capable of being in communication with fluid in the device under test to form a sensing channel and the sensing device is capable of being in communication with fluid in the device under test to thereby sense a parameter of the fluid in the device under test. The sensing device installation cavity 719 is formed by being inwardly depressed from a top surface of the joint upper portion 701, and an internal thread is provided on an inner wall of the sensing device installation cavity 719 for engagement with the external thread of the sensing device, thereby installing the sensing device in the joint upper portion 701. The detection device installation cavity 719 can be adaptively configured according to the structure of the detection device, so that the connector 700 can adapt to different types of detection devices.

the body 722 has an upper body segment 731 and a lower body segment 732, wherein the upper body segment 731 is connected to the head 721. The outer wall of the body upper section 731 is provided with a section of external thread forming a body threaded section 735 for mating with the internal thread in the fitting lower section 702. The body segment 735 has a slot 738 narrowing inward from the outside above, the slot 738 being adapted to receive the joint seal 751. The joint sealing means 751 is a sealing ring made of an elastic material that can be fitted over the body 722 and partially housed in the groove 738. The lower end of the body lower section 732 has a stopper 744 formed to extend outward, and the stopper 744 is used to restrict the upper part 701 of the joint from coming out from above the lower part 702 of the joint. Cavity 709 extends through the lower surface of fitting upper portion 701 and communicates with opening 766 in the lower surface to allow fluid to flow into cavity 709 from opening 766 in the lower surface of fitting upper portion 701. The lower portion of cavity 709 is provided with a groove 715 extending outwardly from the inner wall adjacent opening 766, groove 715 being adapted to receive channel seal 711. The channel seal 711 is a sealing ring made of an elastic material that can be partially fitted into the groove 715, and the inner diameter of the channel seal 711 is smaller than the inner diameter at the edge of the groove 715, that is, at least a portion of the inner edge of the channel seal 711 extends inward beyond the edge of the groove 715.

As shown in fig. 7B and 7D, the connector lower portion 702 includes a top portion 725 and a bottom portion 726, the bottom portion 726 being capable of being connected to a device under test, e.g., external threads are provided on the outside of the bottom portion 726 for mating with internal threads in the device under test to connect the connector 700 to the device under test. The tip 725 includes a section therein that is arranged in a prismatic shape, such as a hexagonal prism, to facilitate engagement with a tool to facilitate threading by the tool. The lower connector part 702 has a receptacle 741 extending in the axial direction, the receptacle 741 being able to receive the upper connector part 701 and being in fluid communication with the device under test. When the upper connector part 701 is inserted into the lower connector part 702, the body part 722 is located in the receptacle 741, while the head part 721 can be blocked by the head part 725, so that the upper connector part 701 cannot be inserted further into the interior of the lower connector part 702.

the cavity 741 has a front cavity section 761 and a rear cavity section 762, the inner wall of the front cavity section 761 comprises a smooth section 765 and a threaded cavity section 767, the threaded cavity section 767 cooperates with the threaded body section 735 of the body 722 such that the coupling upper part 701 and the coupling lower part 702 can be relatively moved in the axial direction of the coupling 700 by being rotated relative to each other by the threaded cooperation. The smooth section 765 is used to mate with the joint seal 751 so that fluid cannot leak out of the gap between the joint upper 701 and the joint lower 702 when the joint upper 701 and the joint lower 702 are rotated relative to each other.

at the lower end of the rear chamber section 162 is a bracket 733, the bracket 733 having an aperture 734, the aperture 734 allowing fluid to pass through the aperture 734 into the chamber 741 in the lower joint part 702. The support 733 is provided with a sealing matching block 730, and the sealing matching block 730 is fixedly connected to the support 733 and extends into the cavity 741. The seal engagement block 730 includes a larger head portion 757 and a waist portion 759 that narrows from the outside inward. As the joint upper part 701 rotates relative to the joint lower part 702, the channel sealing device 711 moves up and down relative to the seal engagement block 730. So that the tunnel seal 711 can be flush with the location of the waist 759 or flush with the location of the head 757.

Fig. 8A and 8B are schematic cross-sectional views of the joint 700 in open and closed states, respectively, and fig. 8A shows the open state of the joint 700. As shown in fig. 8A, an access passage 880 is formed between the lower body segment 732 and the seal engagement block 730. When the fitting 700 is in the open position, the channel seal 711 is flush with the waist 759 of the sealing engagement block and has a gap with the waist 759 and the inlet channel 880 is open. Fluid can enter between the seal engagement block 730 and the seal engagement device 711 from the aperture 734 in the direction shown by arrow 885, and through the cavity 709, the fluid can communicate with a sensing device attached to the coupling upper portion 101. At this time, the inlet passage 880 is opened and the fitting 700 is communicated.

Figure 8B shows the coupling 700 in a closed state, when the coupling 700 needs to be disconnected, the coupling upper part 701 is rotated relative to the coupling lower part 702, so that the coupling upper part 701 is moved away from the coupling lower part 702 due to the cooperation of the threads between the coupling upper part 701 and the coupling lower part 702 until the position shown in figure 8B is reached. At this time, the passage seal 711 is moved by the joint upper part 701 to a position flush with the head 757 of the seal fitting block 730 and abuts against the head 757, so that the passage seal 711 is in contact with the head 757 and the passage seal 711 is slightly deformed by the pressing of the head 757, so that a seal is formed between the seal 711 and the head 757. Inlet passage 880 is closed and fluid cannot enter cavity 709. The joint 700 is closed.

fitting 700 has similar advantages to fitting 100 and can perform the function of fitting 100.

figure 9A is a fifth embodiment of the present application and provides an alternative fitting 900. the fitting 900 is similar to the fitting 700 shown in figures 7A and 7B except that a sealing device 911 is provided within the lower portion 902 of the fitting.

Fig. 9A is a perspective view of a first embodiment of the joint of the present application, fig. 9B is an exploded perspective view of the joint of fig. 9A, and fig. 9C and 9D are axial sectional views of a joint upper portion and a joint lower portion, respectively, for illustrating the structure of the joint, and as shown in fig. 9A and 9B, a joint 900 includes a joint upper portion 901 and a joint lower portion 902, the joint upper portion 901 is partially inserted into the joint lower portion 902, and the joint upper portion 901 is rotatable with respect to the joint lower portion 902. Joint 900 can be opened or closed by relative rotation between joint upper portion 901 and joint lower portion 902. The lower part 902 of the connector is used for connecting with the device under test, and the upper part 901 of the connector is used for connecting with the detection device, so that the opening and closing of the connector 900 are controlled, and the connection and disconnection between the fluid in the device under test and the detection device are controlled. The detection means may be a meter or a sensor or the like. The fitting 900 further includes a channel seal 911 and a fitting seal 951.

as shown in fig. 9B and 9C, the joint upper portion 901 includes a head 921 and a body 922, wherein the head 921 has an outer diameter greater than the outer diameter of the body 922, the head 921 is insertable into the joint lower portion 902, and the body 922 is blocked by the joint lower portion 902 from further insertion into the joint lower portion 902. The head 921 includes a segment arranged in a prism shape, such as a hexagonal prism shape, for cooperating with a tool. A cavity 909, and a sensing device mounting cavity 919 are formed in the joint upper portion 901, and the sensing device mounting cavity 919 is used for mounting a sensing device. Cavity 909 is in communication with sensing device mounting volume 919, and cavity 909 is capable of being in communication with a fluid in a device under test to form a sensing channel, such that sensing device is capable of being in communication with a fluid in a device under test to thereby sense a parameter of a fluid in the device under test. The detection device mounting cavity 919 is formed by inward depression from the top surface of the joint upper portion 901, and internal threads are provided on the inner wall of the detection device mounting cavity 919 for mating with external threads of a detection device, thereby mounting the detection device in the joint upper portion 901. The detection device installation cavity 919 can be configured adaptively according to the structure of the detection device, so that the connector 900 can adapt to different types of detection devices conveniently.

The body 922 has an upper body section 931 and a lower body section 932, wherein the upper body section 931 is connected to the head 921. The outer wall of the body upper section 931 is provided with a section of external threads forming a body threaded section 935 for mating with internal threads in the joint lower section 902. A groove 938 formed by narrowing inward from the outside is formed above the body threaded section 935, and the groove 938 is used for installing the joint sealing device 951. The nipple seal 951 is a seal ring made of an elastomeric material that can be fitted over the body 922 and partially received in the groove 938. The lower end of the body lower section 932 has a stopper portion 944 formed to extend outward, and the stopper portion 944 is used to restrict the joint upper portion 901 from coming out from above the joint lower portion 902. The side wall of the lower body section 932 is provided with a plurality of holes 971, and the holes 971 communicate with the cavity 909, so that fluid can enter the cavity 909 through the holes 971.

As shown in fig. 9B and 9D, the connector lower portion 902 includes a top portion 925 and a bottom portion 926, the bottom portion 926 being capable of being connected to a device under test, e.g., with external threads provided on the outside of the bottom portion 926 for mating with internal threads in the device under test to attach the connector 900 to the device under test. The top portion 925 includes a segment that is arranged in a prism shape, such as a hexagonal prism, to facilitate engagement with a tool for facilitating screwing by the tool. The lower joint part 902 has a receptacle 941 extending through it in the axial direction, the receptacle 941 being able to receive the upper joint part 901 and being in communication with the fluid in the device under test. When the joint upper part 901 is inserted into the joint lower part 902, the body 922 is located in the receptacle 941 and the head 921 can be blocked by the top 925 so that the joint upper part 901 cannot continue to be inserted into the interior of the joint lower part 902.

Cavity 941 has a cavity front section 961 and a cavity rear section 962, the inner wall of cavity front section 961 containing a smooth section 965 and a cavity threaded section 967, the cavity threaded section 967 mating with a body threaded section 935 of body 922 so that joint upper portion 901 and joint lower portion 902 can be relatively moved in the axial direction of joint 900 by rotation relative to each other through a threaded fit. Smooth section 965 is configured to mate with coupling seal 951 such that upon relative rotation of coupling upper portion 901 and coupling lower portion 902, fluid cannot leak out of the gap between coupling upper portion 901 and coupling lower portion 902.

Cavity back section 962 includes a first section 968 and a second section 969, the diameter of first section 968 being smaller than the diameter of second section 969, thereby forming a step 955 at the junction of first section 968 and second section 969, step 955 for preventing removal of joint upper portion 901 from joint lower portion 902.

the first segment 968 has a groove 915 formed by recessing inward from the wall, the groove 915 is used for installing the channel seal 911, and when the channel seal 911 is installed in the groove 915, the inner side of the channel seal 911 exceeds the edge of the groove 915 inward. The channel sealing device 911 is a sealing ring made of an elastic material.

Fig. 10A and 10B are schematic cross-sectional views of the joint 900 in the opened and closed states, respectively, and fig. 10A shows the opened state of the joint 900. As shown in fig. 10A, an inlet passage 1080 is formed between the body lower section 932 and the cavity rear section 962. When the fitting 900 is in the open position, the passage seal 911 is misaligned with the aperture 971 and is positioned above the aperture 971 and the inlet passage 1080 is open. The channel seal 911 is now pressed by the side wall of the fitting lower part 901 and against the side wall of the fitting lower part 901. Fluid can flow in the direction indicated by arrow 1085 from the gap between the aperture 971 and the sidewall of the fitting lower portion 901 into the aperture 971, through the aperture 971 into the cavity 909, with the inlet passage 1080 open and the fitting 900 communicating.

Fig. 10B shows the joint 900 in a closed state, when the joint 900 needs to be disconnected, the joint upper part 901 is rotated relative to the joint lower part 902, so that the joint upper part 901 is moved away from the joint lower part 902 in the axial direction of the joint 900 due to the cooperation of the threads between the joint upper part 901 and the joint lower part 902, up to the position shown in fig. 10B. At this point, the channel seal 911 is just flush with the location of the aperture 971, and the channel seal 911 can return to its original shape, thereby sealing off the aperture 971, such that the inlet channel 980 is closed and fluid cannot enter the cavity 909, such that the fitting 900 is closed.

Connector 900 has similar advantages as connector 100 and can perform the function of connector 100.

fig. 11A is a sixth embodiment of the present application, providing another joint 1100, the joint 1100 being similar to the joint 100 shown in fig. 1A and 1B, except that the upper joint part 1102 comprises resilient means therein.

Fig. 11A is a perspective view of a first embodiment of a joint of the present application, fig. 11B is an exploded perspective view of the joint in fig. 11A, and fig. 11C and 11D are axial sectional views of a joint upper portion and a joint lower portion, respectively, for illustrating the structure of the joint, as shown in fig. 11A and 11B, a joint 1100 includes a joint upper portion 1101 and a joint lower portion 1102, the joint upper portion 1101 is partially inserted into the joint lower portion 1102, and the joint upper portion 1101 is rotatable with respect to the joint lower portion 1102. The joint 1100 can be opened or closed by relative rotation between the joint upper part 1101 and the joint lower part 1102. The lower connector part 1102 is used for connecting with the device to be tested, and the upper connector part 1101 is used for connecting with the detection device, so that the opening and closing of the connector 1100 can be controlled to control the connection and disconnection between the fluid in the pipeline and the detection device. The detection means may be a meter or a sensor or the like. The joint 1100 further includes a first joint seal 1151 and a second joint seal 1152.

As shown in fig. 11B and 11C, the joint upper part 1101 includes a head part 1121 and a body part 1122, wherein the outer diameter of the head part 1121 is larger than the outer diameter of the body part 1122, the head part 1121 can be inserted into the joint lower part 1102, and the body part 1122 is blocked by the joint lower part 1102 and cannot be inserted into the joint lower part 1102 continuously. The head 1121 includes a segment that is configured in a prismatic shape, such as a hexagonal prism, for mating with a tool. A cavity 1109 is provided in the upper part 1101 of the joint, and a detection means mounting receptacle 1119, the detection means mounting receptacle 1119 being for mounting a detection means. Cavity 1109 is in communication with detection device mounting volume 1119 and cavity 1109 is capable of being in communication with a fluid in a device under test to form a detection channel such that the detection device is capable of being in communication with the fluid in the device under test to thereby detect a parameter of the fluid in the device under test. Detection device mounting receptacle 1119 is formed by an inward recess from the top surface of joint upper portion 1101, and an internal thread is provided on the inner wall of detection device mounting receptacle 1119 for mating with the external thread of a detection device to mount the detection device in joint upper portion 1101. The detection device installation cavity 1119 can be configured adaptively according to the structure of the detection device, so that the connector 1100 can adapt to different types of detection devices conveniently.

The body 1122 is connected to the head 1121, and the body 1122 has an upper body 1131 and a lower body 1132, wherein the upper body 1131 is connected to the head 1121. The outer wall of the body upper section 1131 is provided with a section of external thread forming a body threaded section 1135 for mating with the internal thread in the fitting lower part 1102. The body threaded segment 1135 has a slot 1138 formed by narrowing from the outside to the inside, and the slot 1138 is used for accommodating the first joint sealing device 1151. The first joint seal 1151 is a seal ring made of an elastomeric material that fits over the body 1122 and is partially received in the channel 1138.

The body lower section 1132 includes a spring device limiting section 1160, and a limiting opening 1163 extending in an axial direction is formed in a sidewall of the spring device limiting section 1160. A slot 1139 is formed below the spring means retaining section 1160 and narrows inwardly from the outer surface of the side wall, the slot 1139 being adapted to receive a second joint sealing means 1152. The lower end of the body lower section 1132 has an outwardly protruding limit step 1144 for limiting the disengagement of the joint upper part 1101 from the joint lower part 1102.

the cavity 1109 includes a first section 1193 and a second section 1194, wherein the inner diameter of the first section 1193 is smaller than the inner diameter of the second section 1194, thereby forming a stop step 1175 at the junction of the first section 1193 and the second section 1194, the stop step 1175 for contacting the channel seal 1111. The upper end of the second segment 1194 defines an opening 1197, and the first segment 1193 and the second segment 1194 communicate through the opening 1197. The first section 1193 has a spring support block 1173, the spring support block 1173 has a through hole 1178, and when the spring support block 1173 is inserted into the cavity 1109, the inner wall of the upper portion 1101 of the outer wall connector of the spring support block 1173 is in close contact with the through hole 1178, so that the fluid can flow through the through hole 1178.

as shown in fig. 11B and 11D, the joint lower 1102 includes a joint lower body 1117, and an elastic means 1110. Wherein the connector lower body 1117 comprises a top portion 1125 and a bottom portion 1126, the bottom portion 1126 being connectable to the device under test, e.g., with external threads provided on the outside of the bottom portion 1126 for mating with internal threads in the device under test to connect the connector 1100 to the device under test. The top 1125 includes a prismatic segment, such as a hexagonal prism, for mating with a tool to facilitate threading by the tool. Sub lower body 1117 has a cavity 1141 therethrough in an axial direction, cavity 1141 capable of receiving upper joint portion 1101 and communicating with fluid in the device under test. When the connector upper portion 1101 is inserted into the connector lower body 1117, the body 1122 is located in the cavity 1141 and the head 1121 can be blocked by the top 1125 so that the connector lower body 1117 cannot be inserted further into the interior of the connector lower body 1117.

Cavity 1141 has a cavity front section 1161 and a cavity rear section 1162, an inner wall of cavity front section 1161 includes a smooth section 1165 and a cavity threaded section 1167, cavity threaded section 1167 cooperates with body threaded section 1135 of body 1122 so that joint upper portion 1101 and joint lower main body 1117 can rotate relative to each other through threaded cooperation and move relative to each other along an axial direction of joint 1100. The smooth segment 1165 is configured to cooperate with the first joint seal 1151 such that upon relative rotation of the upper joint part 1101 and the lower joint body 1117, the first joint seal 1151 is compressed by the smooth segment 1165 to form a seal such that fluid cannot leak from the gap between the upper joint part 1101 and the lower joint body 1117 to the environment.

The rear cavity section 1162 includes a protruding section 1179 that narrows radially inward, the upper end of the protruding section 1179 forming a first limit step 1177, and the lower end of the protruding section 1179 forming a second limit step 1178. The first limit step 1177 is used for cooperating with the limit pin 1189 to limit the downward moving distance of the elastic device, and the second limit step 1178 is used for limiting the upper joint part 1101 to fall off from the lower joint part main body 1117.

Fig. 11E is a schematic cross-sectional view of the elastic means, which includes a channel sealing means 1111 and a spring 1116. Wherein the tunnel seals 1111 are made of an elastic material, and the lower ends of the tunnel seals 1111 are tapered from below to form an inverse cone. A link 1187 is provided above the tunnel seal 1111, a spring is sleeved on the link 1187, and the lower end of the spring 1116 is capable of contacting the tunnel seal 1111. The channel sealing device 1111 is provided with a through hole penetrating along the axial direction, the limit pin 1189 penetrates through the through hole, and both ends of the limit pin 1189 respectively extend out of the through hole.

Fig. 12A and 12B are schematic sectional views of the joint 1100 in the opened and closed states, respectively, and fig. 12A shows the opened state of the joint 1100. An inlet passage 1280 is formed between resilient means 1110 and the sidewall of cavity 1109. At this time, the limit pin 1189 abuts against the first limit step 1175. In this state, the spring 1116 is compressed, the channel seal 1111 is moved away from the second segment 1194, and the inlet channel 1280 is opened such that fluid from the second segment 1194 enters the first segment 1193 through the opening 1197, passes through the gap between the channel seal 1111 and the inner wall of the fitting upper portion 1101, flows through the spring 1188, and passes through the through hole 1178 to communicate with the sensing device.

Fig. 12B shows the joint 1100 in a closed state, and when the joint 1100 needs to be disconnected, the joint upper part 1101 is rotated with respect to the joint lower body 1117 so as to approach the joint lower body 1117 until the state shown in fig. 12B is reached. At this time, the passage seal 1111 is under tension of the spring, abutting on the first limit step 1175, and the passage seal 1111 is pressed by the first limit step 1175 to cover the opening 1197 of the second section 1194, so that the fluid cannot enter the first section 1193 and the inlet passage 1280 is closed. At this time, the connector 1100 is closed.

Connector 1100 has the same advantages as connector 100, enabling the functionality of connector 100.

fig. 13A is a seventh embodiment of the present application, providing another joint 1300, the joint 1300 being similar to the joint 1100 shown in fig. 11A and 11B, except that the resilient means 1310 is provided on the joint upper portion 1301.

Fig. 13A is a perspective view of a seventh embodiment of the joint of the present application, fig. 13B is an exploded perspective view of the joint in fig. 13A, fig. 13C, 3D and 13E are one axial sectional views of a joint upper body, an elastic means and a joint lower part, respectively, for illustrating the structure of a joint 1300, as shown in fig. 13A and 13B, the joint 1300 includes a joint upper part 1301 and a joint lower part 1302, the joint upper part 1301 is partially inserted into the joint lower part 1302, and the joint upper part 1301 is rotatable with respect to the joint lower part 1302. Joint 1300 can be opened or closed by relative rotation between joint upper 1301 and joint lower 1302. The lower part 1302 of the connector is used for connecting with the device under test, and the upper part 1301 of the connector is used for connecting with the detection device, so that the opening and closing of the connector 1300 are controlled, and the connection and disconnection between the fluid in the device under test and the detection device are controlled. The detection means may be a meter or a sensor or the like. The fitting 1300 also includes a fitting seal 1351 and a channel seal 1311.

As shown in fig. 13B and 13C, the fitting upper 1301 includes a fitting upper body 1318 and a resilient means 1310. Fitting upper body 1318 includes a head 1321 and a body 1322, wherein head 1321 has an outer diameter that is greater than an outer diameter of body 1322, head 1321 is insertable into fitting lower portion 1302, and body 1322 is blocked from continued insertion into fitting lower portion 1302 by fitting lower portion 1302. A cavity 1309 and a detection device installation cavity 1319 are arranged in the joint upper body 1318, and the detection device installation cavity 1319 is used for installing a detection device. Cavity 1309 is in communication with sensing device mounting cavity 1319 and cavity 1309 is capable of being in communication with a fluid in a device under test to form a sensing channel so that a sensing device can be in communication with the fluid in the device under test to sense a parameter of the fluid in the device under test. Detection device mounting cavity 1319 is formed by being recessed inward from the top surface of joint upper body 1318, and an internal thread is provided on the inner wall of detection device mounting cavity 1319 for fitting with the external thread of a detection device, thereby mounting the detection device in joint upper body 1318. The detection device installation cavity 1319 may be adaptively configured according to the structure of the detection device, so that the joint 1300 is adapted to different types of detection devices.

body 1322 is attached to head 1321. the outer wall of body 1322 is provided with an external thread forming a body thread segment 1335 for mating with an internal thread in fitting lower portion 1302. The body threaded section 1335 is provided with a slot 1338 formed by narrowing from the outside inward, the slot 1338 being used for accommodating the joint sealing device 1351. The joint seal 1351 is a ring made of an elastomeric material that can fit over the body 1322 and be partially received in the groove 1338. The body 1322 has apertures 1371 in the side wall thereof to allow fluid to enter the cavity 1309 through the apertures 1371 to communicate with the sensing device.

As shown in fig. 13B and 13D, the joint upper part 1301 further includes an elastic device 1310, the elastic device 1310 has a pushing block 1373 and a supporting block 1314, the pushing block 1373 and the supporting block 1314 are connected by a link 1387, a spring 1388 is sleeved on the link, one end of the spring 1388 abuts against the lower surface of the pushing block 1373, and the other end can abut against the joint upper part main body 1318. The support block 1314 is provided with a groove 1315 formed by being depressed inward from the upper surface for mounting the passage sealing device 1311. The channel sealing means 1311 is a sealing ring made of an elastic material.

As shown in fig. 13B and 13E, the connector lower portion 1302 includes a top portion 1325 and a bottom portion 1326, and the bottom portion 1326 is capable of being connected to a device under test, for example, by providing external threads on the outside of the bottom portion 1326 for mating with internal threads in the device under test to connect the connector 1300 to the device under test. Joint lower part 1302 has a cavity 1341 running through in axial direction, cavity 1341 being able to accommodate joint upper body 1318 and being in communication with the fluid in the device under test. When connector upper body 1318 is inserted into connector lower portion 1302, body 1322 is positioned in receptacle 1341 and head 1321 can be blocked by top 1325 so that connector upper body 1318 cannot continue to be inserted into the interior of connector lower portion 1302.

Cavity 1341 has a cavity front section 1361 and a cavity rear section 1362, the inner wall of cavity front section 1361 contains a smooth section 1365 and a cavity thread section 1367, cavity thread section 1367 mates with body thread section 1335 of body 1322 so that joint upper body 1318 can be relatively moved along the axial direction of joint 1300 by rotating joint lower body 1302 relative to each other through a threaded mating. Smooth section 1365 is used to mate with joint seal 1351 such that when joint upper body 1318 and joint lower 1302 are rotated relative to each other, fluid cannot leak from the gap between joint upper body 1318 and joint lower 1302.

The receptacle back section 1362 includes an inner radially inwardly narrowing projection 1379, the upper end of the projection 1379 forming a first stop step 1375 and the lower end of the projection 1379 forming a second stop step 1376. First stop step 1375 is adapted to contact an end of spring 1388 and second stop step 1376 is adapted to make mating contact with port seal 1311.

Fig. 14A and 14B are schematic cross-sectional views of the joint 1300 in the open and closed states, respectively, and fig. 14A shows the open state of the joint 1400. An inlet passage 1480 is formed between the resilient means 1310 and the fitting lower portion 1302. The connector upper body 1318 now pushes the block to position the support block 1314 away from the second limit step 1376, with the spring in compression. Inlet passage 1480 is opened and fluid flows in the direction of arrow 1485 through the gap between support block 1314 and the inner wall of joint lower portion 1302, through the gap between flow passage seal 1311 and second stop step 1376, through the gap between link 1387 and projection 1379, into the space around spring 1388, through hole 1371 into pocket 1309 to communicate with the sensing device.

fig. 14B shows joint 1300 in a closed state, and when joint 1300 needs to be disconnected, joint upper body 1318 is rotated relative to joint lower body 1302, away from joint lower body 1302, until the state shown in fig. 14B is reached. At this time, the spring 1388 is deformed again to drive the pushing block 1373 to move upward to the farthest position, the pushing block 1373 drives the supporting block 1314 to move upward to the farthest position, at this time, the channel sealing device 1311 abuts against the second limiting step 1376, and the channel sealing device 1311 is pressed by the second limiting step 1376 to be sealed with the second limiting step 1376. Inlet passage 1480 is closed, thereby closing junction 1300.

Joint 1300 has the same advantages as joint 100, enabling the function of joint 100.

The connector structure that provides in this application is simple, low in manufacturing cost, easily opens and closes to the leakproofness is good, and is difficult for leaking, and fluid among the equipment under test gets into external environment when avoiding dismouting instrument or sensor. Particularly, when the fluid in the tested device is the refrigerant, the joint has good sealing performance and can be closed quickly, so that the frosting phenomenon caused by the leakage of the refrigerant and the over-slow closing process in the process of closing the tested device can be avoided. The upper part of the connector in the application can be designed to be matched with various meters or sensors of different models, and a switching device is not required to be additionally arranged between the meter and the tested equipment.

While only certain features of the application have been illustrated and described herein, many modifications and changes will occur to those skilled in the art. It is, therefore, to be understood that the appended claims are intended to cover all such modifications and changes as fall within the true spirit of the application.

Claims

1. A fitting, characterized in that the fitting comprises:

an inlet passage disposed between the fitting upper portion and the fitting lower portion, the cavity in communication with the inlet passage;

a channel sealing device;

The channel sealing means can be caused to close or open the inlet channel, and thereby close or open the joint, by the relative rotational cooperation of the upper and lower joint parts.

2. the fitting of claim 1, wherein:

By rotating the joint upper part, the joint upper part and the joint lower part can be relatively moved.

3. The fitting of claim 1, wherein:

The joint further includes a joint sealing device disposed outside the joint upper portion and contactable with the joint lower portion such that sealing is enabled between the joint upper portion and the joint lower portion.

4. the fitting of claim 1, wherein:

The cavity forms a detection channel which is used for being communicated with a detection device.

5. The fitting of claim 1, wherein:

The channel sealing device is a sealing ring, a channel sealing device mounting groove is formed in the upper portion of the joint, and the sealing ring is arranged in the channel sealing device mounting groove.

6. The fitting of claim 1, wherein: the connector upper portion is provided with a head portion and a body portion, the head portion is used for being connected with a detection device, the connector lower portion is provided with a containing cavity, and the body portion can be inserted into the containing cavity in the connector lower portion.

7. The fitting of claim 6, wherein: the outer side of the body part and the inner side of the containing cavity are respectively provided with threads which can be matched with each other, so that when the joint upper part and the joint lower part rotate relatively, the joint upper part can move relative to the joint lower part along the axial direction of the joint, and the joint upper part is close to or far away from the joint lower part.

8. the fitting of claim 7, wherein:

when the joint upper part moves relative to the joint lower part, the joint upper part drives the channel sealing device to move, so that the inlet channel is closed or opened.

9. the fitting of claim 1, wherein:

The lower portion of the fitting has a limit step against which the inlet passage is closed when the passage sealing means abuts.

10. The fitting of claim 1, wherein: the joint upper part comprises a movable part, the channel sealing device is arranged on the movable part, and when the joint upper part rotates relative to the joint lower part, the movable part can drive the channel sealing device to close or open the inlet channel.

11. The fitting of claim 10, wherein: the outer side of the movable part is shaped to fit the joint lower part such that the movable part moves relative to the joint lower part in the axial direction of the joint when the joint upper part is rotated relative to the joint lower part.