Sealing pressure measuring connector

Abstract

The invention relates to the field of gas pressure measurement, in particular to a sealed pressure measurement connector which comprises a shell, a connecting socket used for being connected with a pressure measurement connector is formed in the top end of the shell, limiting unit movable cavities are symmetrically formed in the connecting socket, and limiting units used for clamping the pressure measurement connector are symmetrically arranged in the limiting unit movable cavities in a sliding fit mode. One side of the limiting unit moving cavity is vertically provided with a supporting plate moving cavity in a communicating mode, the bottom of the supporting plate moving cavity is provided with a sealing head limiting cavity in a communicating mode, a linkage unit is vertically arranged in the supporting plate moving cavity, and when a pressure measuring connector is inserted, transverse separation of the limiting unit drives the linkage unit to move downwards, and the sealing head limiting unit is pushed to exit transversely; the sealing head is not fixed, automatic linkage of connection and sealing of the pressure measuring connector is achieved, the movement of the sealing head limiting unit drives the gas transmission channel blocking plate to block the gas transmission channel of the first pressure measuring connector, gas leakage during connector switching is avoided, and switching of the gas transmission channels is triggered synchronously.

Description

Technical Field

[0001] The present invention relates to the technical field of gas pressure measurement, and in particular to a sealed pressure measuring joint. Background Art

[0002] In the field of gas pressure measurement, pressure gauge joints are key components for quickly connecting equipment to pipelines. Traditional pressure gauge joints often use a threaded tightening method, which is inefficient to install and can easily wear the sealing surface due to repeated disassembly, leading to gas leaks.

[0003] When the current pressure measuring joints are not in use, the internal sealing elements are easily displaced by vibration or air pressure shock, causing gas leakage. At the same time, when switching between multiple pressure measuring interfaces, the original joints need to be disassembled. At this time, the residual gas in the pipeline is easy to leak from the open interface. The fixation of the connector is separated from the internal sealing control, which makes the operation cumbersome and may cause the seal to fail due to misoperation. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a sealed pressure measuring joint.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A sealed pressure measuring joint comprises a housing, a connection socket for connecting a pressure measuring connector is provided at the top of the housing, a limit unit movable cavity is symmetrically provided on the connection socket, a limit unit for clamping the pressure measuring connector is symmetrically slidably fitted in the limit unit movable cavity, one side of the limit unit movable cavity is connected to a vertically provided support plate movable cavity, and the bottom of the support plate movable cavity is connected to a sealing head limit cavity; A linkage unit is vertically arranged in the movable cavity of the support plate, and the linkage unit is used to realize the synchronous movement of the limit units on both sides of the top. The sealing head limit cavity is horizontally slidably matched with a sealing head limit unit for resisting the vertical movable range of the sealing head, and a locking mechanism is arranged below the sealing head limit unit; A sealing head movable chamber is provided inside the shell, a first pressure measuring interface connected to the inside and outside of the sealing head movable chamber is provided in the middle of the shell, an adjustment port is provided on one side wall of the shell, the adjustment port is used to adjust the locking mechanism, a gas delivery column is vertically provided in the middle of the bottom wall of the sealing head movable chamber, the gas delivery column is connected to the joint at the bottom of the shell, a third spring is vertically provided on the outer peripheral side of the gas delivery column, and a sealing head is provided on the top of the third spring to prevent gas leakage.

[0006] In addition, the preferred structure is that the first pressure measuring interface is provided with an air supply channel on the side of the sealing head movable cavity, the first pressure measuring interface is located on the side of the air supply channel and is connected with a threaded interface, the sealing head movable cavity is located on the inner wall of the air supply channel and is provided with a sealing plate movable cavity that facilitates the movement of the sealing head limiting unit, and a connecting air channel is provided inside the joint, which is connected to the air supply column.

[0007] In addition, a preferred structure is that a sealing head limiting portion for abutting against the sealing head is provided at the bottom of the connecting socket, a connecting head limiting portion for abutting against the pressure measuring connecting head is provided above the sealing head limiting portion, and a rubber ring cavity is provided above the connecting head limiting portion; A limiting unit slide rod is provided in the movable cavity of the limiting unit on both sides, and the limiting unit is slidably fitted on the limiting unit slide rod. A first spring is sleeved on the outside of the limiting unit slide rod body, and one end of the first spring is against the side wall of the movable cavity of the limiting unit, and the other end is against the limiting unit.

[0008] In addition, a preferred structure is that the limit unit includes a limit block connecting plate that is slidably fitted on the limit unit sliding rod, a limit unit sliding hole is provided on the limit block connecting plate, one end of the limit block connecting plate is fixedly connected to the limit block, the limit blocks are arranged to slide in the limit unit active cavities on both sides, and the limit blocks are used to clamp the pressure measuring connector, a limit cone portion is provided on the limit block, and a single rod bearing is provided on the plate body of the limit block connecting plate away from the other end of the limit block, and the single rod bearing is used to rotatably fit on the linkage unit; The linkage unit includes an upper pushing plate, the bottom of the upper pushing plate is fixedly connected to a supporting plate, the upper pushing plate and the supporting plate are arranged in a supporting plate movable cavity and move vertically, a limiting slide groove is symmetrically provided on the upper pushing plate, a single rod bearing slides in the limiting slide groove, the top of the upper pushing plate is fixedly connected to a pressure plate, the pressure plate extends to the outer surface of the top of the shell, a slider is provided on the bottom side surface of the upper pushing plate, the slider slides vertically and fits on a slider slide rod vertically arranged at the top of the supporting plate movable cavity, and a first roller is rotatably provided at the bottom of the supporting plate, and the first roller is used to push the sealing head limiting unit.

[0009] In addition, a preferred structure is that limit slots are symmetrically provided on both sides of the outer wall of the middle portion of the pressure measuring connector, the limit slots are used to be clamped by the limit blocks, a shell connecting end is provided at the bottom of the pressure measuring connector, the shell connecting end is used to be inserted into the connecting socket, and a sealing structure is provided at the connection between the tube body with the limit slot and the shell connecting end; The sealing structure includes a rubber ring for connecting the shell connection end and the tube body with a limiting slot. A plurality of elastic sheets are evenly arranged and installed on the inner circumference of the rubber ring. The top end of the elastic sheet is clamped on the bottom of the tube body with a limiting slot, and the bottom end of the elastic sheet is clamped on the shell connection end. Limiting protrusions are provided on the surface corresponding to the shell connection end, and sealing ring installation grooves are provided on the limiting protrusions on the upper and lower sides.

[0010] In addition, a preferred structure is that the sealing head limiting unit includes a conical frame, a sliding plate is provided at the bottom of the conical frame, the sliding plate is slidably fitted on a conical frame slide rod provided in the sealing head limiting cavity, and a fifth spring is sleeved on the outside of the conical frame slide rod, one end of the fifth spring abuts against the side wall of the sealing head limiting cavity, and the other end abuts against the conical frame slide rod; The conical frame is used to be pushed by the first roller, and a sealing head limit plate is fixedly connected to the bottom of the conical frame, and the sealing head limit plate is used to support the sealing head. The front end of the sealing head limit plate is fixedly connected to the air duct sealing plate, and the air duct sealing plate is arranged at the active cavity of the sealing plate for translation. The end of the air duct sealing plate away from the sealing head limit plate is located at the air duct, and a sealing gasket is affixed to the plate surface of the air duct sealing plate facing the air duct, and an air vent is provided on one side of the sealing gasket. A roller limit groove is provided at the bottom of the sliding plate, and the roller limit groove is used to be locked by the locking mechanism.

[0011] In addition, the preferred structure is that the locking mechanism includes a sliding rod symmetrically arranged in the adjustment port, and a locking pressure plate is horizontally slidably engaged on the sliding rod. A fourth spring is sleeved on the sliding rod, and the top end of the fourth spring abuts the locking pressure plate, and the bottom end of the fourth spring abuts the bottom wall of the adjustment port. A second roller is provided on the upper surface of the end of one side of the locking pressure plate close to the sealing head limit unit, and the second roller is used to fit into the roller limit groove.

[0012] In addition, a preferred structure is that a cavity is provided inside the gas delivery column, and air holes are provided on the top of the gas delivery column in a symmetrical and horizontal manner, and a sealing head is used to seal the air holes.

[0013] In addition, a preferred structure is that the sealing head includes a filling block, a rubber pad is attached to the outer surface of the filling block, a spring groove is opened on the outer peripheral side of the bottom end surface of the filling block, and the spring groove is used to insert the third spring, and a through hole is opened vertically through the middle of the sealing head, and the diameter of the through hole is consistent with the diameter of the gas transmission column; The filling block is located on both sides of the inner wall of the through hole and is symmetrically provided with sealing ball limiting holes. The sealing ball limiting holes are connected to the sealing ball movable cavity. A sealing ball is arranged in the sealing ball movable cavity. The sealing ball is used to seal the air hole. A second spring is arranged in the sealing ball movable cavity on the other side of the sealing ball away from the sealing ball limiting hole. The second spring is used to support the sealing ball.

[0014] The beneficial effects of the present invention are: 1. When the pressure measuring connector is inserted, the lateral separation of the limit unit drives the linkage unit downward, pushing the sealing head limit unit to withdraw laterally, releasing the fixation of the sealing head, and realizing the automatic linkage between the connection and sealing of the pressure measuring connector. The movement of the sealing head limit unit drives the gas channel blocking plate to block the gas channel of the first pressure measuring interface, avoiding gas leakage when the interface is switched, and realizing the synchronous triggering of the switching of the gas channel.

[0015] 2. The sealing head limit unit clamps the sealing head under the action of the fifth spring to prevent the sealing from failing due to vibration displacement when it is not connected. The sealing head moves downward under pressure, and the top sealing ball is pushed open by the air pressure. The gas enters the pressure measuring connector through the air hole at the top of the gas transmission column. The bottom sealing ball blocks the air hole below under the action of the second spring, blocking the gas from entering the active cavity of the sealing head, thereby achieving channel isolation.

[0016] 3. The anti-accidental-touch locking mechanism is set. When the linkage unit moves downward, the second roller of the locking mechanism automatically snaps into the roller limit groove of the sealing head limit unit to lock its position, ensuring that the sealing head is always in an active state during the pressure measurement process.

[0017] 4. The sealing structure of the pressure measuring connector uses an elastic sheet to expand the rubber ring, thereby enhancing the radial sealing performance of the rubber ring cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the pressure measuring joint connected to the pressure measuring connector; Figure 2 This is a schematic diagram of the structure of the shell and the pressure measuring connector separated; Figure 3 Schematic diagram of the structure inside the shell; Figure 4 This is a schematic diagram of the internal structure when the housing is connected to the pressure measuring connector; Figure 5 It is a structural diagram of the pressure measuring connector; Figure 6 It is a structural schematic diagram of the sealing structure; Figure 7 Schematic diagram of the structure of the sealing head inside the shell; Figure 8 is a cross-sectional view of the sealing head; Figure 9 is a cross-sectional view of the shell; Figure 10 Schematic diagram of the structure of the gas transmission column; Figure 11 Schematic diagram of the structure of the movable cavity of the limiting unit; Figure 12 It is a structural diagram of the limit unit; Figure 13 It is a structural diagram of the limit block; Figure 14 It is a structural diagram of the linkage unit, the sealing head limit unit and the locking mechanism; Figure 15 It is a structural diagram of the linkage unit; Figure 16 Schematic diagram of the structure of the supporting plate active cavity; Figure 17 It is a structural diagram of the locking mechanism; Figure 18 It is a structural diagram of the sealing head limiting unit; Figure 19 It is a structural diagram of the active cavity of the sealing plate.

[0019] In the figure: 01, fifth spring; 02, tapered frame slide; 1, housing; 11, first pressure measuring interface; 111, air delivery channel; 112, threaded interface; 12, second pressure measuring interface; 13, regulating port; 14, joint; 141, connecting air channel; 15, sealing head movable cavity; 16, connecting socket; 161, sealing head limiter; 162, connecting head limiter; 163, limiter unit movable cavity; 1631, first Spring; 1632, limit unit slide rod; 164, rubber ring cavity; 17, support plate movable cavity; 171, slide rod for slider; 18, sealing head limit cavity; 19, blocking plate movable cavity; 2, pressure measuring connector; 21, limit slot; 22, housing connection end; 23, sealing structure; 231, rubber ring; 232, elastic sheet; 233, limit bump; 234, sealing ring mounting groove; 3, limit unit; 31 , limit block connecting plate; 32, limit unit sliding hole; 33, limit block; 331, limit cone surface; 34, single rod bearing; 4, linkage unit; 41, upper push plate; 42, pressure plate; 43, limit slide groove; 44, slider; 45, support plate; 46, first roller; 5, sealing head; 51, filling block; 52, rubber pad; 53, spring groove; 54, through hole; 55, sealing ball activity cavity; 56, sealing ball Limiting hole; 57, second spring; 58, sealing ball; 6, third spring; 7, gas delivery column; 71, air hole; 8, sealing head limiting unit; 81, conical frame; 82, sealing head limiting plate; 83, gas delivery channel blocking plate; 84, sealing gasket; 85, air vent; 86, sliding plate; 87, roller limiting groove; 9, locking mechanism; 91, sliding rod; 92, fourth spring; 93, locking pressure plate; 94, second roller. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-19A sealed pressure measuring joint comprises a shell 1, a connecting socket 16 for connecting a pressure measuring connector 2 is provided at the top of the shell 1, a limiting unit movable cavity 163 is symmetrically provided on the connecting socket 16, a limiting unit 3 for clamping the pressure measuring connector 2 is symmetrically slidably fitted in the limiting unit movable cavity 163, one side of the limiting unit movable cavity 163 is connected to a vertically opened support plate movable cavity 17, the bottom of the support plate movable cavity 17 is connected to a sealing head limiting cavity 18, a linkage unit 4 is vertically arranged in the support plate movable cavity 17, the linkage unit 4 is used to realize the synchronous movement of the limiting units 3 on both sides of the top, a sealing head limiting unit 8 for resisting the vertical movable range of the sealing head 5 is horizontally slidably fitted in the sealing head limiting cavity 18, and a locking mechanism 9 is provided below the sealing head limiting unit 8 to prevent the sealing head limiting unit 8 from rebounding.

[0022] Among them, a sealing head active cavity 15 is opened inside the shell 1, and a first pressure measuring interface 11 connected with the inside and outside of the sealing head active cavity 15 is opened in the middle of the shell 1. An adjusting port 13 is opened on the side wall of one side of the shell 1. The adjusting port 13 is used to adjust the locking mechanism 9. A gas delivery column 7 is vertically arranged in the middle of the bottom wall of the sealing head active cavity 15. The gas delivery column 7 is connected with the joint 14 at the bottom of the shell 1. A third spring 6 is vertically arranged on the outer peripheral side of the gas delivery column 7. A sealing head 5 is provided on the top of the third spring 6 to prevent gas leakage. When the pressure measuring connector 2 is not inserted, the sealing head 5 blocks the opening at the bottom of the connecting socket 16.

[0023] Moreover, the first pressure measuring interface 11 is provided with an air supply channel 111 on the side of the sealing head movable cavity 15, and the first pressure measuring interface 11 is connected to the side of the air supply channel 111 with a threaded interface 112. The sealing head movable cavity 15 is located at the air supply channel 111 and is provided with a sealing plate movable cavity 19 on the inner wall thereof for facilitating the movement of the sealing head limiting unit 8. A connecting air channel 141 is provided inside the joint 14, and the connecting air channel 141 is connected to the air supply column 7, which is used to transmit gas into the sealing head movable cavity 15.

[0024] At the same time, a sealing head limiting portion 161 for supporting the sealing head 5 is provided at the bottom of the connecting socket 16, and a connecting head limiting portion 162 for supporting the pressure measuring connecting head 2 is provided above the sealing head limiting portion 161. A rubber ring cavity 164 is provided above the connecting head limiting portion 162. A limiting unit slide rod 1632 is provided in the limiting unit active cavity 163 on both sides. The limiting unit 3 slides on the limiting unit slide rod 1632. The outside of the limiting unit slide rod 1632 is provided with a first spring 1631. One end of the first spring 1631 is against the side wall of the limiting unit active cavity 163, and the other end is against the limiting unit 3. The first spring 1631 realizes reset and clamping.

[0025] Moreover, the limit unit 3 includes a limit block connecting plate 31 that slides on the limit unit slide rod 1632, and a limit unit sliding hole 32 is provided on the limit block connecting plate 31. One end of the limit block connecting plate 31 is fixedly connected to the limit block 33. The limit block 33 is arranged to slide in the limit unit active cavity 163 on both sides, and the limit block 33 is used to clamp the pressure measuring connector 2. A limit conical surface portion 331 is provided on the limit block 33. A single-rod bearing 34 is provided on the plate body of the limit block connecting plate 31 away from the other end of the limit block 33. The single-rod bearing 34 is used to rotate and fit on the linkage unit 4, and the single-rod bearing 34 cooperates with the limited slide groove 43 to drive the displacement.

[0026] In addition, the linkage unit 4 includes an upper push plate 41, and the bottom of the upper push plate 41 is fixedly connected to a support plate 45. The upper push plate 41 and the support plate 45 are arranged in the support plate movable cavity 17 for vertical movement. A limiting slide groove 43 is symmetrically provided on the upper push plate 41, and the single rod bearing 34 slides in the limiting slide groove 43. The top of the upper push plate 41 is fixedly connected to a pressure plate 42, and the pressure plate 42 extends to the top outer surface of the shell 1. A slider 44 is provided on the bottom side surface of the upper push plate 41. The slider 44 slides vertically on the slider slide rod 171 vertically arranged at the top of the support plate movable cavity 17. A first roller 46 is rotatably provided at the bottom of the support plate 45. The first roller 46 is used to push the sealing head limiting unit 8, and the first roller 46 is used to push the sealing head limiting unit 8 downward to move horizontally.

[0027] In addition, limit slots 21 are symmetrically provided on both sides of the outer wall of the middle part of the pressure measuring connector 2, and the limit slots 21 are used to be clamped by the limit blocks 33. A shell connecting end 22 is provided at the bottom of the pressure measuring connector 2, and the shell connecting end 22 is used to be inserted into the connecting socket 16, and a sealing structure 23 is provided at the connection between the tube body with the limit slot 21 and the shell connecting end 22. The sealing structure 23 includes a rubber ring 231 for connecting the shell connecting end 22 and the tube body with the limit slot 21. A plurality of elastic sheets 232 are evenly arranged on the inner circumference of the rubber ring 231. The top end of the elastic sheet 232 is clamped on the bottom of the tube body with the limit slot 21, and the bottom end of the elastic sheet 232 is clamped on the shell connecting end 22, and limiting protrusions 233 are provided on the corresponding surfaces of the shell connecting end 22. The limiting protrusions 233 on the upper and lower sides are provided with sealing ring mounting grooves 234. The sealing ring mounting grooves 234 are used to install sealing rings to improve the sealing performance when they are fitted together.

[0028] Among them, the sealing head limiting unit 8 includes a conical frame 81, and a sliding plate 86 is provided at the bottom of the conical frame 81. The sliding plate 86 slides on the conical frame slide rod 02 set in the sealing head limiting cavity 18, and a fifth spring 01 is provided on the outside of the conical frame slide rod 02. One end of the fifth spring 01 rests on the side wall of the sealing head limiting cavity 18, and the other end rests on the conical frame slide rod 02, the conical frame slide rod 02.

[0029] In addition, the conical frame 81 is used to be pushed by the first roller 46, and a sealing head limit plate 82 is fixedly connected to the bottom of the conical frame 81. The sealing head limit plate 82 is used to support the sealing head 5. The front end of the sealing head limit plate 82 is fixedly connected to the air duct sealing plate 83. The air duct sealing plate 83 is arranged to move horizontally in the sealing plate active cavity 19. The end of the air duct sealing plate 83 away from the sealing head limit plate 82 is located at the air duct 111. A sealing gasket 84 is affixed to the plate surface of the air duct sealing plate 83 facing the air duct 111, and an air vent 85 is provided on one side of the sealing gasket 84. A roller limit groove 87 is provided at the bottom of the sliding plate 86, and the roller limit groove 87 is used to be locked by the locking mechanism 9.

[0030] Moreover, the locking mechanism 9 includes a sliding rod 91 symmetrically arranged in the adjustment port 13, and a locking pressure plate 93 is horizontally slidably fitted on the sliding rod 91. A fourth spring 92 is sleeved on the sliding rod 91, and the top end of the fourth spring 92 rests against the locking pressure plate 93, and the bottom end of the fourth spring 92 rests against the bottom wall of the adjustment port 13. A second roller 94 is provided on the upper surface of the locking pressure plate 93 at one end near the sealing head limit unit 8, and the second roller 94 is used to fit into the roller limit groove 87, and the second roller 94 facilitates the clamping of the sliding plate 86.

[0031] At the same time, a cavity is opened inside the gas delivery column 7 , and air holes 71 are opened horizontally and symmetrically on the top of the gas delivery column 7 , and the sealing head 5 is used to block the air holes 71 .

[0032] Among them, the sealing head 5 includes a filling block 51, a rubber pad 52 is attached to the outer surface of the filling block 51, a spring groove 53 is provided on the outer peripheral side of the bottom surface of the filling block 51, and the spring groove 53 is used to embed the third spring 6. A through hole 54 is vertically penetrated in the middle of the sealing head 5, and the diameter of the through hole 54 is consistent with the diameter of the gas transmission column 7. The filling block 51 is located on both sides of the inner wall of the through hole 54 and sealing ball limiting holes 56 are symmetrically provided on the upper and lower sides. The sealing ball limiting holes 56 are connected to the sealing ball movable cavity 55. A sealing ball 58 is provided in the sealing ball movable cavity 55. The sealing ball 58 is used to block the air hole 71. A second spring 57 is provided in the sealing ball movable cavity 55 on the other side of the sealing ball 58 away from the sealing ball limiting hole 56. The second spring 57 is used to resist the sealing ball 58.

[0033] In this embodiment, the shell 1 is a pressure measuring joint for connecting to the pipeline. In daily use, the first pressure measuring interface 11 can be selected to install an ordinary pipeline pressure gauge for long-term testing. When a precision pressure measuring instrument needs to be used midway, the pressure measuring connector 2 can be selected for quick connection without rotating it for installation. During installation, it is only necessary to insert the pressure measuring connector 2 directly into the second pressure measuring interface 12. After the shell connection end 22 is inserted, the shell connection end 22 will squeeze the limit blocks 33 on both sides, so that the limit blocks 33 on both sides slide and separate from each other on the limit unit slide rod 1632, and the first spring 1631 contracts. After the pressure measuring connector 2 is installed, the sealing structure 23 plays a sealing role.

[0034] After the limit slot 21 is moved into place, the limit block 33 is released by the elastic potential energy of the first spring 1631 and is re-engaged in the limit slot 21. At this time, the installation of the pressure measuring connector 2 is completed, and at this time, the shell connection end 22 and the tube body at the limit slot 21 squeeze the sealing structure 23, so that the elastic sheet 232 is squeezed outward and the rubber ring 231 is stretched open, so that the rubber ring 231 fits tightly in the rubber ring cavity 164, thereby improving the sealing of the connection.

[0035] And at the same time as the limit blocks 33 are separated, the single-rod bearings 34 on both sides move laterally, so that the single-rod bearings 34 pull the upper push plate 41 to move downward in the support plate movable cavity 17, and the first roller 46 moves downward. During the displacement process, the first roller 46 rolls on the conical surface of the conical frame 81, so that the first roller 46 pushes the conical frame 81 to cooperate with the sliding plate 86 to slide on the conical frame slide rod 02, so that the sliding plate 86 squeezes the fifth spring 01 to contract in this process, thereby pulling the sealing head limit plate 82 away from the bottom of the sealing head 5, so that the sealing head 5 can move up and down.

[0036] When the second roller 94 is engaged with the sliding plate 86, the locking plate 93 is moved upward on the sliding rod 91, and the second roller 94 is engaged with the sliding plate 86.

[0037] The sealing head limit unit 8 provided effectively ensures that when the second pressure measuring interface 12 is in an unconnected state, the sealing head limit plate 82 effectively clamps the sealing head 5 to prevent it from sliding due to shaking, thereby causing gas leakage at the sealing head limit portion 161, thereby effectively improving the sealing performance.

[0038] During the installation of the pressure measuring connector 2, the pressure measuring connector 2 squeezes the sealing head 5 without the sealing head limit unit 8 downward, and the sealing head 5 slides vertically on the gas supply column 7. As the sealing head 5 moves, the sealing ball 58 that originally blocked the top air hole 71 is squeezed and shrinks into the sealing ball active cavity 55, and the second spring 57 contracts, so that the gas is discharged from the top air hole 71 and directly enters the pressure measuring connector 2, while the bottom air hole 71 is blocked by the sealing ball 58, so that the gas no longer enters the sealing head active cavity 15, so that the instrument connected to the second pressure measuring interface 12 can be disassembled and replaced without gas leakage.

[0039] In the present invention, when the pressure measuring connector 2 is inserted, the lateral separation of the limiting unit 3 drives the linkage unit 4 to move downward, pushing the sealing head limiting unit 8 to withdraw laterally, releasing the fixation of the sealing head 5, and realizing the automatic linkage between the pressure measuring connector connection and the seal. The movement of the sealing head limiting unit 8 drives the air channel sealing plate 83 to block the air channel 111 of the first pressure measuring interface 11, avoiding gas leakage when the interface is switched, and realizing the synchronous triggering of the switching of the gas channel.

[0040] In addition, the sealing head limit unit 8 clamps the sealing head 5 under the action of the fifth spring 01 to prevent it from being displaced due to vibration in the unconnected state, resulting in sealing failure. The sealing head 5 is pressed downward, and the top sealing ball 58 is pushed open by the air pressure. The gas enters the pressure measuring connector 2 through the air hole 71 at the top of the gas transmission column 7. The bottom sealing ball 58 blocks the lower air hole 71 under the action of the second spring 57, blocking the gas from entering the sealing head active cavity 15, thereby realizing channel isolation.

[0041] The anti-accidental-touch locking mechanism 9 is set. When the linkage unit 4 moves downward, the second roller 94 of the locking mechanism 9 automatically snaps into the roller limiting groove 87 of the sealing head limiting unit 8, locking its position to ensure that the sealing head 5 is always in an active state during the pressure measurement process.

[0042] The sealing structure 23 of the pressure measuring connector 2 expands the rubber ring 231 through the elastic sheet 232 , thereby enhancing the radial sealing performance of the rubber ring cavity 164 .

[0043] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A sealed pressure measuring joint, comprising a housing (1), characterized in that: A second pressure measuring interface (12) for connecting to a pressure measuring connector (2) is provided at the top of the housing (1), a connecting socket (16) is provided in the second pressure measuring interface (12), a limiting unit movable cavity (163) is symmetrically provided on the connecting socket (16), a limiting unit (3) for clamping the pressure measuring connector (2) is symmetrically slidably fitted in the limiting unit movable cavity (163), one side of the limiting unit movable cavity (163) is connected to a vertically provided supporting plate movable cavity (17), and the bottom of the supporting plate movable cavity (17) is connected to a sealing head limiting cavity (18); A linkage unit (4) is vertically arranged in the support plate movable cavity (17), and the linkage unit (4) is used to realize the synchronous movement of the limit units (3) on both sides of the top. A sealing head limit unit (8) is horizontally slidably matched in the sealing head limit cavity (18) for supporting the vertical movement range of the sealing head (5), and a locking mechanism (9) is arranged below the sealing head limit unit (8); A sealing head movable chamber (15) is provided inside the shell (1), a first pressure measuring interface (11) communicating with the inside and outside of the sealing head movable chamber (15) is provided in the middle of the shell (1), an adjustment port (13) is provided on one side wall of the shell (1), and the adjustment port (13) is used to adjust the locking mechanism (9), a gas delivery column (7) is vertically provided in the middle of the bottom wall of the sealing head movable chamber (15), the gas delivery column (7) is communicated with a joint (14) at the bottom of the shell (1), a third spring (6) is vertically provided on the outer peripheral side of the gas delivery column (7), and a sealing head (5) is provided on the top of the third spring (6) to prevent gas leakage.

2. A sealed pressure measuring joint according to claim 1, characterized in that: The first pressure measuring interface (11) is provided with an air delivery channel (111) on one side of the sealing head movable cavity (15), and the first pressure measuring interface (11) is provided with a threaded interface (112) on one side of the air delivery channel (111). The sealing head movable cavity (15) is provided with a blocking plate movable cavity (19) on the inner wall thereof, which facilitates the movement of the sealing head limiting unit (8). A connecting air channel (141) is provided inside the joint (14), and the connecting air channel (141) is connected to the air delivery column (7).

3. A sealed pressure measuring joint according to claim 1, characterized in that: The bottom of the connecting socket (16) is provided with a sealing head limiting portion (161) for resisting the sealing head (5), and above the sealing head limiting portion (161) is provided a connecting head limiting portion (162) for resisting the pressure measuring connecting head (2), and above the connecting head limiting portion (162) is provided a rubber ring cavity (164); A limiting unit slide rod (1632) is provided in the limiting unit movable cavity (163) on both sides, and the limiting unit (3) is slidably fitted on the limiting unit slide rod (1632). A first spring (1631) is sleeved on the outside of the rod body of the limiting unit slide rod (1632), and one end of the first spring (1631) is against the side wall of the limiting unit movable cavity (163), and the other end thereof is against the limiting unit (3).

4. A sealed pressure measuring joint according to claim 3, characterized in that: The limit unit (3) includes a limit block connecting plate (31) that is slidably engaged with the limit unit slide rod (1632), a limit unit sliding hole (32) is provided on the limit block connecting plate (31), one end of the limit block connecting plate (31) is fixedly connected to the limit block (33), the limit blocks (33) are arranged to slide in the limit unit active cavity (163) on both sides, and the limit blocks (33) are used to clamp the pressure measuring connector (2), a limit conical surface (331) is provided on the limit block (33), and a single rod bearing (34) is provided on the plate body of the limit block connecting plate (31) away from the other end of the limit block (33), and the single rod bearing (34) is used to rotatably engage with the linkage unit (4); The linkage unit (4) includes an upper push plate (41), the bottom of the upper push plate (41) is fixedly connected to a support plate (45), the upper push plate (41) and the support plate (45) are arranged in a support plate movable cavity (17) and move vertically, a limit slide groove (43) is symmetrically provided on the upper push plate (41), and a single rod bearing (34) is slidably fitted in the limit slide groove (43), the top of the upper push plate (41) is fixedly connected to a pressure plate (42), and the pressure plate (42) extends to the top outer surface of the shell (1), a slider (44) is provided on one side surface of the bottom of the upper push plate (41), and the slider (44) is vertically slidably fitted on a slider slide rod (171) vertically provided at the top of the support plate movable cavity (17), and a first roller (46) is rotatably provided at the bottom of the support plate (45), and the first roller (46) is used to push the sealing head limit unit (8).

5. The sealed pressure measuring joint according to claim 1, characterized in that: The pressure measuring connector (2) has limit slots (21) symmetrically provided on both sides of the outer wall of the middle portion, the limit slots (21) being used to be clamped by the limit blocks (33), a shell connecting end (22) being provided at the bottom of the pressure measuring connector (2), the shell connecting end (22) being used to be inserted into the connecting socket (16), and a sealing structure (23) being provided at the connection between the tube body having the limit slots (21) and the shell connecting end (22); The sealing structure (23) comprises a rubber ring (231) for connecting the shell connection end (22) and the tube body with a limiting slot (21). A plurality of elastic sheets (232) are evenly arranged and installed on the inner circumference of the rubber ring (231). The top end of the elastic sheet (232) is clamped on the bottom of the tube body with the limiting slot (21). The bottom end of the elastic sheet (232) is clamped on the shell connection end (22). Limiting protrusions (233) are provided on the surface corresponding to the shell connection end (22). The limiting protrusions (233) on the upper and lower sides are provided with sealing ring installation grooves (234).

6. A sealed pressure measuring joint according to claim 4, characterized in that: The sealing head limiting unit (8) includes a conical frame (81), a sliding plate (86) is provided at the bottom of the conical frame (81), the sliding plate (86) is slidably fitted on the conical frame slide rod (02) provided in the sealing head limiting cavity (18), and a fifth spring (01) is sleeved on the outside of the conical frame slide rod (02), one end of the fifth spring (01) abuts against the side wall of the sealing head limiting cavity (18), and the other end abuts against the conical frame slide rod (02); The conical frame (81) is used to be pushed by the first roller (46), and the bottom of the conical frame (81) is fixedly connected to a sealing head limit plate (82), and the sealing head limit plate (82) is used to resist the sealing head (5). The front end of the sealing head limit plate (82) is fixedly connected to an air delivery channel blocking plate (83), and the air delivery channel blocking plate (83) is arranged at the blocking plate active cavity (19) for translation. The end of the air delivery channel blocking plate (83) away from the sealing head limit plate (82) is located at the air delivery channel (111), and a sealing gasket (84) is attached to the plate surface of the air delivery channel blocking plate (83) facing the air delivery channel (111), and a vent hole (85) is provided on one side of the sealing gasket (84). A roller limit groove (87) is provided at the bottom of the sliding plate (86), and the roller limit groove (87) is used to be locked by the locking mechanism (9).

7. A sealed pressure measuring joint according to claim 6, characterized in that: The locking mechanism (9) includes a sliding rod (91) symmetrically arranged in the adjustment port (13), a locking pressure plate (93) is horizontally slidably fitted on the sliding rod (91), a fourth spring (92) is sleeved on each sliding rod (91), the top end of the fourth spring (92) abuts against the locking pressure plate (93), and the bottom end of the fourth spring (92) abuts against the bottom wall of the adjustment port (13), and a second roller (94) is provided on the upper surface of the end of one side of the locking pressure plate (93) close to the sealing head limiting unit (8), and the second roller (94) is used to fit into the roller limiting groove (87).

8. The sealed pressure measuring joint according to claim 1, characterized in that: A cavity is provided inside the gas delivery column (7), and air holes (71) are provided on the top of the gas delivery column (7) in a symmetrical manner, and the sealing head (5) is used to seal the air holes (71).

9. The sealed pressure measuring joint according to claim 8, characterized in that: The sealing head (5) includes a filling block (51), a rubber pad (52) is attached to the outer surface of the filling block (51), a spring groove (53) is provided on the outer peripheral side of the bottom surface of the filling block (51), and the spring groove (53) is used to embed the third spring (6). A through hole (54) is vertically opened in the middle of the sealing head (5), and the diameter of the through hole (54) is consistent with the diameter of the gas transmission column (7); The filling block (51) is located on both sides of the inner wall of the through hole (54) and is symmetrically provided with sealing ball limiting holes (56). The sealing ball limiting holes (56) are connected to the sealing ball activity cavity (55). A sealing ball (58) is provided in the sealing ball activity cavity (55). The sealing ball (58) is used to block the air hole (71). A second spring (57) is provided in the sealing ball activity cavity (55) on the other side of the sealing ball (58) away from the sealing ball limiting holes (56). The second spring (57) is used to resist the sealing ball (58).

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