CN219828086U - Medium-high pressure resistant zero leakage connecting joint - Google Patents

Abstract

The utility model discloses a zero-leakage connecting joint resistant to medium and high pressure, which comprises a left valve body and a right valve body which are coaxially and hermetically connected, wherein a left valve core is movably arranged in the left valve body, a left flow channel is arranged on the left valve body, a right valve core is movably arranged in the right valve body, a right flow channel is arranged on the right valve body, an intermediate flow channel is arranged in the right valve core, and the zero-leakage connecting joint also comprises a tension bolt, and the left valve core and the right valve core can be hermetically connected into a whole when the tension bolt is screwed; the tension bolt can pull the left valve core and the right valve core to move leftwards simultaneously so that two ends of the middle runner are respectively communicated with the left runner and the right runner, and can also push the left valve core and the right valve core to move rightwards simultaneously so that the middle runner, the left runner and the right runner are disconnected. The zero leakage connecting joint resistant to medium and high pressure eliminates the connecting space through the valve body structure, can avoid the natural release of residual gas and liquid when the two parts are connected, is reliable and strong, and can be suitable for zero leakage connection and disconnection of medium and high pressure fluid transmission.

Description

Medium-high pressure resistant zero leakage connecting joint

Technical Field

The utility model relates to the field of connecting joints, in particular to a medium-high pressure resistant zero-leakage connecting joint.

Background

In the fields of chemical industry, physical tests, nuclear power and the like, various harmful gases (liquids) are transmitted, sampled and sampled, and the like, a connecting joint is needed to realize transmission connection and disconnection between a pipeline and a container. When the conventional connecting joint is used, generally, because a space is always reserved in the connection between the pipeline valve and the container valve, after the two valves are closed to separate the two connections, residual fluid (gas or liquid) is always naturally released in the connection space; especially in gas transport, since most are pressurized gases, harmful gases are released in volumes that are multiples of the superatmospheric pressure. These released fluids can contaminate the surrounding environment and even threaten the safety of the operator.

In this regard, we have developed a connecting valve body and a connecting valve body joint (application number: CN 202310075893.5) which eliminates a connecting space by arranging a valve body on the joint and by a valve body structure, so that after the connection of the two separated parts, residual gas and liquid in the connecting space can be introduced into a relevant air passage through the air passage change of the valve body, and the natural release of the residual gas and liquid is avoided. However, in the use process of the connecting valve body, the left valve body is coaxially abutted with the right valve body, the right valve core moves towards the inside of the left valve body along the coaxial axis, or the left valve core moves towards the inside of the right valve body along the coaxial axis, so that the coaxiality requirement on the left valve core and the right valve core is higher, and the initial alignment is not easy during connection.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and provides a middle-high pressure resistant zero-leakage connecting joint, which eliminates a connecting space through a valve body structure, can avoid natural release of residual gas and liquid when two parts are connected, can quickly guide and finish centering of a left valve core and a right valve core when the two parts are connected, is more convenient for initial alignment of connecting operation, and simultaneously connects the left valve core and the right valve core into a whole through a tension bolt when the middle-high pressure resistant zero-leakage connecting joint is used, is reliable and strong, and is more suitable for zero-leakage connection and disconnection of middle-high pressure fluid transmission because the transmission of pressure medium is always in an annular sealing piece with the same radius, and no axial pressure difference exists all the time, namely no axial thrust exists.

The aim of the utility model is realized by the following technical scheme:

the zero-leakage connecting joint resistant to medium and high pressure comprises a left valve body and a right valve body which are coaxially and hermetically connected, wherein a left valve core is movably arranged in the left valve body, a left flow channel is arranged on the left valve body, a right valve core is movably arranged in the right valve body, a right flow channel is arranged on the right valve body, and a middle flow channel is arranged in the right valve core; the valve body is characterized by further comprising a tension bolt, one end of the tension bolt is movably arranged in the left valve body, the left valve core is sleeved on the tension bolt, one end of the left valve core is internally provided with a guide hole, one end of the tension bolt extends out of the guide hole, one end of the right valve core is provided with a guide section, the guide section is slidably arranged in the guide hole, the end part of the tension bolt is in threaded connection with the guide section, one end, close to the guide section, of the right valve core is provided with a shaft shoulder, and the shaft shoulder is in sealed connection with one end of the left valve core when the tension bolt is screwed up; the tension bolt can pull the left valve core and the right valve core to move leftwards simultaneously so that two ends of the middle runner are respectively communicated with the left runner and the right runner, and can also push the left valve core and the right valve core to move rightwards simultaneously so that the middle runner, the left runner and the right runner are disconnected.

Further, a hand wheel is rotatably arranged at one end, far away from the right valve body, of the left valve body, the tension bolt is sleeved in the center of the hand wheel, and the tension bolt is in threaded connection with the hand wheel; the valve is characterized in that a limit key is fixedly arranged on the right valve body, a limit chute is axially formed in the outer side face of the right valve core, and one end of the limit key is slidably arranged in the limit chute.

Further, a limiting hole is formed in the end, far away from the left valve body, of the hand wheel inwards, a bolt head is arranged at the end, far away from the left valve core, of the tension bolt, and the bolt head is movably sleeved in the limiting hole.

Furthermore, a spline housing is fixedly arranged at one end, close to the hand wheel, in the left valve body, a spline shaft is fixedly sleeved on the tension bolt, and the spline shaft is matched with the spline housing.

Further, the valve further comprises a joint body, and one end of the left valve body is in sealing connection with one end of the right valve body through the joint body.

Further, the valve further comprises a left valve body shell and a right valve body shell, wherein an air inlet is formed in the left valve body shell, the left valve body is arranged in the left valve body shell, the left runner is communicated with the air inlet, an air outlet is formed in the right valve body shell, the right valve body is arranged in the right valve body shell, and the right runner is communicated with the air outlet.

The beneficial effects of the utility model are as follows:

this zero leakage attach fitting of high pressure resistant carries out institutional advancement on the basis of current design, it includes coaxial sealing connection's left valve body and right valve body, left valve body internal activity is provided with left case, be provided with left runner on the left valve body, the inside activity of right valve body is provided with right case, be provided with right runner on the right valve body, be provided with middle runner in the right case, still be provided with the tensioning bolt, the one end of left case and the one end sealing connection of right case when tightening the tensioning bolt, both are fixed into a case whole, can drive this case whole axial displacement through controlling the tensioning bolt, in order to make the both ends of middle runner communicate with left runner and right runner respectively when this attach fitting intercommunication, or make the equal closure disconnection of middle runner, left runner and right runner when this joint disconnection. Therefore, through the design of the valve body structure, the function of eliminating the connecting space is reserved, so that the natural release of residual gas and liquid is avoided when the two parts are connected, and zero leakage is realized. Compared with the prior art, the left valve core has the advantages that the guide hole is formed in one end of the left valve core inwards, the guide section is arranged at one end of the right valve core and is matched with the guide hole, the left valve core and the right valve core can be directly aligned and centered in the process of connecting the left valve body and the right valve body, the connection of the tension bolts is convenient, and the connection process is faster and more convenient. In addition, the left valve core and the right valve core are connected into a whole through the tension bolt, so that the influence of medium pressure can be avoided, and the transmission connection and disconnection of medium and high pressure gas or liquid medium can be realized; meanwhile, the position of the valve core can be intuitively judged through the extending length of the tension bolt, so that the reliability is higher.

The connector body is arranged, the left valve body and the right valve body can be directly connected through the connector body in a fastening way and simultaneously seal, and the connector is more convenient compared with the existing design connection process. The hand wheel is arranged, the connection or disconnection of the tension bolt and the right valve core can be controlled by rotating the hand wheel, and the axial movement of the tension bolt and the left valve core and the right valve core after being connected into a whole is controlled, so that the operation is convenient; the spline shaft and the spline sleeve are arranged, and the rotation freedom degree of the tension bolt is limited in a communication working state through the two adaptations, so that the loose threaded connection between the tension bolt and the right valve core caused by rotation of the tension bolt due to error touch and other reasons is avoided, and the reliability is ensured.

Drawings

FIG. 1 is a schematic view of the external structure of a medium-high pressure resistant zero-leakage connection joint in a separated state;

FIG. 2 is a schematic diagram of the internal structure of a left valve body in a middle-high pressure resistant zero-leakage joint according to the present utility model;

FIG. 3 is a schematic view of the internal structure of the right valve body in the middle-high pressure resistant zero-leakage connecting joint;

FIG. 4 is a cross-sectional view of a zero-leak connection joint with high-medium pressure resistance in a connection ready state according to the present utility model;

FIG. 5 is a cross-sectional view of a medium and high pressure resistant zero-leakage connection joint in a connected operating state;

FIG. 6 is a schematic view of the inside of a three-dimensional structure of a medium-high pressure resistant zero-leakage connecting joint in a communication working state;

in the figure, the valve comprises a 10-left valve body, a 11-left valve core, a 12-left runner, a 13-left valve body shell, a 14-air inlet, a 15-first sealing ring A, a 16-first sealing ring B, a 17-guiding hole, a 18-spline housing, a 19-spline shaft, a 20-right valve body, a 21-right valve core, a 22-right runner, a 23-middle runner, a 24-right valve body shell, a 25-air outlet, a 26-second sealing ring A, a 27-second sealing ring B, a 28-end face sealing ring A, a 29-end face sealing ring B, a 30-tightening bolt, a 31-guiding section, a 32-hand wheel, a 33-limit key, a 34-limit chute and a 40-connector body.

Detailed Description

The technical solutions of the present utility model will be described in further detail below with reference to the accompanying drawings, but the scope of the present utility model includes but is not limited to the following.

As shown in fig. 1 to 6, a middle-high pressure resistant zero leakage connection joint comprises a left valve body 10 and a right valve body 20 which are coaxially and hermetically connected, wherein a left valve core 11 is movably arranged in the left valve body 10, a left flow channel 12 is arranged on the left valve body 10, a right valve core 21 is movably arranged in the right valve body 20, a right flow channel 22 is arranged on the right valve body 20, and a middle flow channel 23 is arranged in the right valve core 21. The valve is characterized by further comprising a tension bolt 30, one end of the tension bolt 30 is movably arranged in the left valve body 10, the left valve core 11 is sleeved on the tension bolt 30, and the end of the tension bolt 30 is in threaded connection with the right valve core 21. When the tension bolt 30 is screwed, one end of the left valve core 11 is in sealing connection with one end of the right valve core 21, and the two are fixed into a whole.

In implementation, one end of the left valve core 11 is inwards provided with a guide hole 17, one end of the tension bolt 30 extends into the guide hole 17, one end of the right valve core 21 is provided with a guide section 31, the guide section 31 is slidably arranged in the guide hole 17, the end of the guide section 31 is chamfered, when the left valve body 10 is connected with the right valve body 20, the guide section 31 can be inserted into the guide hole 17 through centering and guiding, and the connection operation is more convenient. The end face of the shaft shoulder is also provided with an end face sealing ring B29, and when the shaft shoulder is screwed down, the shaft shoulder of the right valve core 21 can be in sealing connection with the end face of one end of the left valve core 11 by the tension bolt 30.

In implementation, the valve is also provided with a left valve body shell 13 and a right valve body shell 24, the left valve body shell 13 is provided with an air inlet 14, the left valve body 10 is arranged in the left valve body shell 13, and the left runner 12 is communicated with the air inlet 14; the right valve body shell 24 is provided with an air outlet 25, the right valve body 20 is arranged in the right valve body shell 24, and the right runner 22 is communicated with the air outlet 25.

When the middle-high pressure resistant zero leakage connecting joint is connected, one end of the left valve body 10 is connected with one end of the right valve body 20 in a sealing way, the left valve core 11 and the right valve core 21 are fixed and connected into a whole in a sealing way by screwing the tension bolt 30, and then the tension bolt 30 is pulled leftwards, the left valve core 11 and the right valve core 21 move leftwards at the same time until two ends of the middle runner 23 are respectively communicated with the left runner 12 and the right runner 22, and at the moment, the air inlet 14 and the air outlet 25 are communicated through the middle runner 23, so that medium conveying can be realized; when the middle-high pressure-resistant zero-leakage connecting joint is disconnected, the tension bolt 30 is pushed rightward firstly, the left valve core 11 and the right valve core 21 simultaneously move rightward to return to the initial positions, at the moment, the middle runner 23, the left runner 12 and the right runner 22 are all closed and disconnected, and then the left valve body 10 and the right valve body 20 are disconnected. The process shows that the medium-high pressure resistant zero-leakage connecting joint eliminates the connecting space through the valve body structure, can avoid the natural release of residual gas and liquid when the two parts are connected, and realizes zero leakage. The left valve core 11 and the right valve core 21 are tightly connected into a whole through the tension bolt 30 in the working state, and the switching between the connected state and the disconnected state is completed through the axial movement of the tension bolt 30 when the valve is used.

In a specific implementation, a first sealing ring a15 and a first sealing ring B16 are sequentially disposed between the left valve body 10 and the left valve core 11 (in this embodiment, the first sealing ring a15 and the first sealing ring B16 are two sealing rings respectively), and when the connection joint is disconnected and in a connection ready state, the left flow channel 12 is located at a position between the first sealing ring a15 and the first sealing ring B16, and one end of the left flow channel 12 can be effectively closed and disconnected by using the first sealing ring a15 and the first sealing ring B16. Two second sealing rings A26 and two second sealing rings B27 are sequentially arranged between the right valve body 20 and the right valve core 21, one end of the middle flow channel 23 is arranged between the two second sealing rings A26, the other end of the middle flow channel 23 is arranged between the two second sealing rings B27, and when the valve is in a disconnection and preparation state, the right flow channel 22 is positioned between the second sealing rings A26 and B27, and both ends of the middle flow channel 23 and one end of the right flow channel 22 can be effectively closed and disconnected through the second sealing rings A26 and B27. By the specific arrangement, zero leakage of the connecting joint during disconnection can be effectively ensured.

Further, a joint body 40 is provided, and the left valve body 10 and the right valve body 20 are connected by the joint body 40. In the concrete implementation, an end face sealing ring A28 is arranged between the end faces of the left valve body 10 and the right valve body 20, one end of the left valve body 10 and one end of the right valve body 20 can be fastened and connected when the joint body 40 is screwed down, and sealing is completed at the same time, so that the device is more convenient compared with the existing design connection process.

Further, a hand wheel 32 is rotatably arranged at one end of the left valve body 10 far away from the right valve body 20, a tension bolt 30 is sleeved at the center of the hand wheel 32, and the tension bolt 30 is in threaded connection with the hand wheel 32; a limit key 33 is fixedly arranged on the right valve body 20, a limit chute 34 is axially arranged on the outer side surface of the right valve core 21, and one end of the limit key 33 is slidably arranged in the limit chute 34. After the left valve core 11 and the right valve core 21 are fixed into a whole by the tension bolt 30, the whole body of the left valve core 11 and the right valve core 21 cannot rotate under the limit of the limit key 33, and the tension bolt 30 and the left valve core 11 and the right valve core 21 can be driven to axially move under the spiral action by rotating the hand wheel 32.

In specific implementation, the spline housing 18 is fixedly arranged at one end, close to the hand wheel 32, in the left valve body 10, the spline shaft 19 is fixedly sleeved on the tension bolt 30, the spline shaft 19 is matched with the spline housing 18, when the tension bolt 30 connects the left valve core 11 and the right valve core 21 into a whole and moves leftwards, the spline shaft 19 stretches into the spline housing 18 to be meshed with the spline housing, and the tension bolt 30 is further limited to rotate, so that the situation that the tension bolt 30 is driven to rotate to cause the loose threaded connection with the right valve core 21 due to the false touch of the tension bolt 30 when the hand wheel 32 is reversely rotated and during operation is avoided.

Further, the one end that left valve body 10 was kept away from to hand wheel 32 inwards has offered spacing hole, and the one end that left valve core 11 was kept away from to the tensioning bolt 30 is equipped with the bolt head, and this spacing downthehole is located to bolt head movable sleeve, and this spacing hole's setting can effectively carry out spacingly to the position that tensioning bolt 30 moved right, makes tensioning bolt 30 and hand wheel 32 back of the body tight when the bolt head moved to this spacing Kong Genbu butt simultaneously, rotates hand wheel 32 and can drive tensioning bolt 30 and rotate together, and the operation is more convenient.

The zero leakage connection joint resistant to medium and high pressure has the following operation process when being connected:

s1, aligning the end faces of a left valve body 10 and a right valve body 20, enabling a guide section 31 of a right valve core 21 to extend into a guide hole 17 of the left valve core 11 under the guide action, completing centering and limiting of the left valve core 11 and the right valve core 21, rotating a tension bolt 30 in the forward direction (because a hand wheel 32 can rotate freely, interference cannot be caused to rotation of the tension bolt 30), and enabling the end part of the tension bolt 30 to start to be screwed into a threaded hole of the guide section 31 to enter threaded engagement;

s2, oppositely pressing the left valve body and the right valve body, continuing to rotate the tension bolt 30 in the forward direction, and tightly closing and tensioning the right valve core 21 to the left valve core 11 in the rotation process of the tension bolt 30 because the limit key 33 and the limit chute 34 limit the rotation of the right valve core 21, wherein the end surfaces of the left valve body 10 and the right valve body 20 are closer to each other until the tension bolt 30 is not rotated, and the tension bolt 30 tightly connects the right valve core 21 and the left valve core 11 into a whole;

s3, pushing rightwards and screwing the joint body 40 to enable the end faces of the left valve body 10 and the right valve body 20 to be tightly pressed and sealed and connected into a whole;

s4, rotating the hand wheel 32 in the forward direction again, under the limit of the limit key 33 and the limit chute 34, the whole valve core connected with the tension bolt 30, the right valve core 21 and the left valve core 11 cannot rotate, the whole valve core is driven to move axially to the left (at this time, the exposed section on the right side of the right valve core starts to be shortened, the spline shaft 19 is inserted into the spline housing 18 after a short distance of movement, the rotation freedom degree of the tension bolt 30 is further limited), until the limit key 33 abuts against the right end of the limit chute 34 and the hand wheel 32 is not rotated, and at this time, when the two ends of the middle runner 23 are respectively communicated with the left runner 12 and the right runner 22, the connection of the connecting joint is completed.

The zero leakage connection joint resistant to medium and high pressure has the following operation process when being disconnected:

s1, reversely rotating a hand wheel 32, wherein under the limitation of a spline shaft 19 and a spline housing 18, a tension bolt 30 cannot rotate, and at the moment, the whole valve core connected with the tension bolt 30, a right valve core 21 and a left valve core 11 moves rightwards until the spline shaft 19 and the spline housing 18 are separated, and at the moment, a middle runner 23, a left runner 12 and a right runner 22 are respectively closed, and the runners are disconnected;

s2, case 1: continuing to reversely rotate the hand wheel 32, moving the whole valve core to the right a small section until the limit key 33 is abutted with the left end of the limit chute 34, and then abutting the bolt head of the tension bolt 30 with the limit Kong Genbu of the hand wheel 32, wherein the end part of the tension bolt 30 is loosened to be connected with the thread of the guide section 31 because the spline shaft 19 and the spline housing 18 are separated, and then synchronously rotating left the end part of the tension bolt 30 and the hand wheel 32; ( Case 2: continuing to rotate the hand wheel 32 in the opposite direction, as the spline shaft 19 and the spline housing 18 are disengaged, the friction torque of the threads of the end portion of the tension bolt 30 screwed into the guide section 31 is smaller than the friction torque of the large threads of the hand wheel 32, and even if the bolt head of the tension bolt 30 is not in contact with the limit Kong Genbu of the hand wheel 32, the end portion of the tension bolt 30 is also loosened to be in threaded connection with the guide section 31, and at the moment, the end portion of the tension bolt 30 and the hand wheel 32 start to synchronously rotate left )

S3, the reverse rotation connector body 40 loosens the connection of the valve bodies at the two ends, the hand wheel 32 is rotated in the reverse direction continuously, the end part of the tension bolt 30 can completely withdraw from the threaded connection with the guide section 31 and push away the valve body of the right valve core, and then the disconnection and the separation of the connection connector are completed.

As can be seen from the above working process, when the connecting joint is connected, the tightening bolt 30 is rotated forward until the tightening bolt is rotated, and then the hand wheel 32 is rotated forward until the tightening bolt is rotated, so that the connection of the left valve core and the right valve core and the axial movement of the whole valve core are completed, and the left runner 12 and the right runner 22 are communicated through the middle runner 23; when the connecting joint is disconnected, the reset of the left valve core and the right valve core can be completed only by continuously and reversely rotating the hand wheel 32, and the whole operation process is simple and reliable.

The foregoing is merely a preferred embodiment of the utility model, and it is to be understood that the utility model is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the utility model are intended to be within the scope of the appended claims.

Claims (6)

1. The utility model provides a zero leakage attach fitting of high pressure resistant, includes coaxial sealing connection's left valve body and right valve body, the activity is provided with left case in the left valve body, be provided with left runner on the left valve body, the activity is provided with right case in the right valve body, be provided with right runner on the right valve body, be provided with middle runner in the right case, its characterized in that;

the valve body is characterized by further comprising a tension bolt, one end of the tension bolt is movably arranged in the left valve body, the left valve core is sleeved on the tension bolt, one end of the left valve core is internally provided with a guide hole, one end of the tension bolt extends out of the guide hole, one end of the right valve core is provided with a guide section, the guide section is slidably arranged in the guide hole, the end part of the tension bolt is in threaded connection with the guide section, one end, close to the guide section, of the right valve core is provided with a shaft shoulder, and the shaft shoulder is in sealed connection with one end of the left valve core when the tension bolt is screwed up;

the tension bolt can pull the left valve core and the right valve core to move leftwards simultaneously so that two ends of the middle runner are respectively communicated with the left runner and the right runner, and can also push the left valve core and the right valve core to move rightwards simultaneously so that the middle runner, the left runner and the right runner are disconnected.

2. The medium-high pressure resistant zero-leakage connecting joint according to claim 1, wherein a hand wheel is rotatably arranged at one end of the left valve body, which is far away from the right valve body, and the tightening bolt is sleeved at the center of the hand wheel and is in threaded connection with the hand wheel; the valve is characterized in that a limit key is fixedly arranged on the right valve body, a limit chute is axially formed in the outer side face of the right valve core, and one end of the limit key is slidably arranged in the limit chute.

3. The medium-high pressure resistant zero-leakage connecting joint according to claim 2, wherein a limiting hole is formed in one end, far away from the left valve body, of the hand wheel, a bolt head is arranged at one end, far away from the left valve core, of the tension bolt, and the bolt head is movably sleeved in the limiting hole.

4. The medium-high pressure resistant zero-leakage connecting joint according to claim 2, wherein a spline housing is fixedly arranged at one end, close to the hand wheel, in the left valve body, a spline shaft is fixedly sleeved on the tension bolt, and the spline shaft is matched with the spline housing.

5. The medium and high pressure resistant zero leakage joint according to claim 1, further comprising a joint body, wherein one end of the left valve body is sealingly connected to one end of the right valve body through the joint body.

6. The medium-high pressure resistant zero-leakage connecting joint according to any one of claims 1 to 5, further comprising a left valve body housing and a right valve body housing, wherein an air inlet is formed in the left valve body housing, the left valve body is arranged in the left valve body housing, the left flow channel is communicated with the air inlet, an air outlet is formed in the right valve body housing, and the right flow channel is communicated with the air outlet.