Pneumatic female joint suitable for various pneumatic male joints
By designing pneumatic female joints suitable for pneumatic male joints of various specifications and adopting a valve core and step-shaped sealing ring structure, the problems of multi-spec matching and high-pressure separation in the prior art are solved, and the rapid adaptation and separation of pneumatic female joints and pneumatic male joints are achieved.
Patent Information
- Application Number
- CN202510133136.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-06
- Publication Date
- 2025-04-25
AI Technical Summary
Existing pneumatic female connectors require multiple specifications to match pneumatic male connectors of different diameters and lengths, and it is difficult to quickly separate under high-pressure gas conditions.
A pneumatic female joint is designed, using a tubular joint body and a valve core that controls the inlet and out of gas. The valve core is equipped with a third limiting groove and a step-like sealing ring, which can be adapted to a variety of pneumatic male joints. At the same time, through the valve stem and exhaust chamber structure perpendicularly through the joint body, the rapid separation of the pneumatic male joint and the pneumatic female joint is achieved.
The adaptation of pneumatic female joints to a variety of pneumatic male joints is achieved, and it can be quickly separated under high pressure conditions, avoiding the need for personnel to move around the switch gas source for a long distance, and improving the flexibility and safety of the gas source connection system.
Smart Images
Figure CN119878946A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of pneumatic pipe joints, and in particular relates to a pneumatic female joint suitable for various pneumatic male joints. Background Art
[0002] Pneumatic pipe joints are currently important connecting components for connecting pneumatic pipe systems to air sources, and they play an important connecting role. Existing pneumatic female joints need to be frequently connected or disconnected with pneumatic male joints in workshop pneumatic systems, but generally a pneumatic female joint of one specification is matched with a pneumatic male joint of one specification, that is, a one-to-one correspondence. With the increase in the types of equipment in production and processing workshops, it is necessary to connect multiple pneumatic male joints of different diameters and lengths for different adaptability to air source flow. Then different male joints require different female joints to match, resulting in the entire air source connection system, especially the pneumatic female joints need to be installed with multiple specifications for matching. In addition, after the existing male joint and female joint are connected, due to the presence of high-pressure gas at the connection, the air source needs to be turned off before the male joint and female joint can be separated. How to solve the above technical problems is the object of research for technical personnel in this field. Summary of the invention
[0003] The invention provides a pneumatic female connector with a simple structure, pressure-connected gas sources of a male connector and a female connector, and convenient separation, and suitable for various pneumatic male connectors.
[0004] A pneumatic female joint suitable for a variety of pneumatic male joints, comprising a tubular joint body, one end of the joint body is provided with a valve core for controlling the inlet and outlet of gas, the valve core is a tubular structure coaxial with the joint body, one end of the valve core is connected to the inner wall of the joint body through a sealing ring inside the joint body, the other end of the valve core extends out of the joint body, the valve core is cooperated with the outer wall of the extended part to connect the pneumatic male joint connecting device, the valve core is provided with an annular third limiting groove on the inner wall of the extended part, a stepped third sealing ring is embedded and installed in the third limiting groove, the inner wall of the third sealing ring is provided with a first sealing hole and a second sealing hole of two different diameters, a first sealing surface is provided at the connection between the first sealing hole and the second sealing hole, the outer wall of the third sealing ring is provided with a concave ring, and the concave ring is embedded with the convex ring on the inner wall of the valve core; the joint body vertically penetrates the connecting valve stem, the valve stem is connected to the first sealing ring to control the opening and closing of the valve port arranged on the pipe wall of the joint body, one side of the valve port is connected to the inner wall of the joint body, and the other side is connected to the exhaust cavity, and the exhaust cavity is connected to the inclined hole located in the pipe wall of the joint body. This type of pneumatic female connector is connected to the inner wall of the connector body through a sealing ring at one end of the valve core inside the connector body. That is, when the pneumatic female connector is connected to the air source, the entire pneumatic pipeline is in a closed state and will not leak. Only after the pneumatic male connector is connected will the valve core be opened to allow the pneumatic male connector to exhaust air. In order to improve the connection adaptability of the pneumatic female connector to pneumatic male connectors of various specifications, a stepped third sealing ring is embedded in the third limiting groove. The first sealing holes and the second sealing holes of two different diameters can adapt to two pneumatic male connectors of different diameters. On the basis of the two pneumatic male connectors of different diameters, end face sealing structures of pneumatic male connectors of different lengths are formed through the first sealing surface, thereby achieving the technical performance of multiple pneumatic male connectors adapting to one pneumatic female connector. Since the pneumatic female connector of the present invention is in a closed state under normal conditions, one end is connected to a pressurized gas source, and the other end can be directly connected to a pneumatic male connector. In order to achieve the rapid separation performance of the pneumatic male connector and the pneumatic female connector under pressure conditions, and at this time, the valve core of the pneumatic female connector cannot be directly closed because the entire pipeline carries high pressure, the present invention adopts a connector body that vertically penetrates the valve stem, and the valve stem is connected to a first sealing ring to control the opening and closing of a valve port arranged on the pipe wall of the connector body. One side of the valve port is connected to the inner wall of the connector body, and the other side is connected to an exhaust cavity. The exhaust cavity is connected to an inclined hole located on the pipe wall of the connector body, and the valve stem is vertically penetrated through the connector body. The opening and closing of the exhaust cavity is controlled by the valve stem, and the pressure in the pneumatic female connector is relieved and exhausted by the inclined hole, so that the pressure of the pneumatic female connector and the pneumatic male connector can be separated under pressure conveniently. After the pneumatic male connector is separated, the pneumatic female connector automatically closes the pipeline through the valve core to prevent air leakage, thereby avoiding the technical problem that when the gas source and the pneumatic female connector are far apart in a large workshop, personnel walk a long distance to switch the gas source to separate the pneumatic female connector and the pneumatic male connector.
[0005] One side of the sealing ring fits into the installation groove inside the connecting joint body, and the other side is provided with a limit ring; the valve core is provided with a ventilation concave ring near one end of the sealing ring, and air holes are provided on the circumference of the ventilation concave ring. When one end of the valve core is tightly connected to the sealing ring, the axial front and rear space of the sealing ring is isolated from ventilation. When one end of the valve core extends out of the sealing ring, the air holes are connected to the axial front and rear space of the sealing ring.
[0006] The pneumatic male connector connection device includes a first spring and a first connecting tube arranged between the valve core and the connector body and sleeved on the outer circumference of the valve core. One end of the first connecting tube is connected to the inner wall thread of the connector body. A limiting hole is arranged on the wall of the first connecting tube, and a limiting steel ball is installed in the limiting hole. A second spring is sleeved on the outer circumference of the first connecting tube, and a control tube is sleeved on the outer circumference of the second spring. The inner wall of the control tube is provided with an annular first limiting groove and a second limiting groove of different depths. The first limiting groove accommodates more than half of the limiting steel ball, and the second limiting groove accommodates less than half of the limiting steel ball. The first limiting groove and the second limiting groove are arranged front and back along the axial direction of the control tube; one end of the second spring is connected to the end face of the valve core, and the other end is connected to the reduced diameter step surface of the inner wall of the control tube. This pneumatic male connector connecting device cooperates with the pneumatic male connector through the limiting hole and the limiting steel ball in the wall of the first connecting tube. When the pneumatic male connector needs to be connected, the control tube is pressed down to compress the second spring. The pneumatic male connector is inserted into the inner wall of the first connecting tube and the limiting steel ball is squeezed into the first limiting groove. Then the control tube is reset under the action of the second spring, and the limiting steel ball is squeezed into the second limiting groove to complete the clamping of the pneumatic male connector, prevent the pneumatic male connector from being separated from the pneumatic female connector, and complete the quick connection performance of the two. At the same time of connection, the pneumatic male connector will push one end of the valve core to extend out of the sealing ring, and the air hole of the valve core connects the axial front and rear space of the sealing ring to realize the automatic connection performance of the internal gas of the pneumatic male connector and the pneumatic female connector, without the need to open and close the air source twice.
[0007] The second sealing hole of the third sealing ring is connected to the concave ring via a sealing end face, and this sealing end face can further perform secondary sealing on the connecting end face of the pneumatic male connector.
[0008] The joint body is provided with mounting step holes on the bottom surface at both ends of the valve stem, and the bottom surface of the mounting step hole is connected to one end of the valve stem. The valve stem extends out of the joint body at this end, and the valve stem is matched with the second mounting step hole of the joint body through the first sealing seat at the other end. The bottom of the second mounting step hole is an exhaust cavity, and the end of the first sealing seat is connected to the first sealing ring. The joint body is provided with mounting step holes on the bottom surface at both ends of the valve stem, which improves the sealing performance between the joint body and the valve stem, ensuring that the exhaust cavity will be exhausted only when the valve stem is opened, and the pneumatic male joint and the pneumatic female joint are easy to separate after exhaust and pressure relief.
[0009] A third sealing ring is provided on the outer periphery of the first sealing seat, and the third sealing ring is tightly connected to the inner wall of the second mounting step hole to improve the sealing performance; a fourth sealing ring is provided at the matching position between one end of the valve stem and the mounting step hole to improve the sealing performance.
[0010] The outer periphery of the joint body is provided with an inclined conical surface, and the taper of the inclined hole is consistent with the conical surface, which reduces the difficulty of drilling the inclined hole, and the conical surface provides a reference surface for drilling the inclined hole.
[0011] A first protrusion located on the outer periphery of the valve stem is provided on the inner side of the valve port, and a return spring is provided on the first protrusion and the outer periphery of the valve stem. One end of the return spring is connected to the outer wall of the exhaust chamber, and the other end is connected to the boss on the outer periphery of the valve stem. The return spring is used to automatically push the valve stem to close the exhaust chamber.
[0012] The present invention realizes the connection of pneumatic male joints of various lengths and diameters by cooperating with a step-shaped sealing ring through a pneumatic male joint connection device, and realizes the exhaust performance of the joint body in combination with an inclined hole structure, so as to facilitate the disassembly and installation of the pneumatic male joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of the three-dimensional structure of a pneumatic female connector suitable for various pneumatic male connectors of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the pneumatic female connector suitable for various pneumatic male connectors of the present invention from another angle; Figure 3 It is a schematic diagram of the top view of the structure of a pneumatic female joint suitable for various pneumatic male joints of the present invention; Figure 4 for Figure 3 AA-direction cross-sectional structural diagram; Figure 5 for Figure 4 The enlarged structural diagram at B in the middle; Figure 6 It is a schematic diagram of the cross-sectional structure of a pneumatic male connector. Specific implementation plan
[0014] The following is combined with Figure 1-6 The specific implementation method further explains the technical solution of this patent in detail.
[0015] A pneumatic female joint suitable for a variety of pneumatic male joints, including a tubular joint body 1, one end of the joint body 1 is provided with a valve core 29 for controlling the inlet and outlet of gas, the valve core 29 is a tubular structure coaxial with the joint body 1, one end of the valve core 29 is connected to the inner wall of the joint body 1 through a sealing ring 88 inside the joint body, the other end of the valve core 29 extends out of the joint body, the valve core is matched with the outer wall of the extended part to connect the pneumatic male joint connection device, the valve core is provided with an annular third limiting groove 14 on the inner wall of the extended part, a stepped third sealing ring 16 is embedded in the third limiting groove 14, and the third sealing ring 16 is installed in the third limiting groove 14. The inner wall of the sealing ring 16 is provided with a first sealing hole 20 and a second sealing hole 18 of two different diameters, and a first sealing surface 19 is provided at the connection between the first sealing hole 20 and the second sealing hole 18. The outer wall of the third sealing ring 16 is provided with a concave ring 15, and the concave ring 15 is engaged with the convex ring 22 of the inner wall of the valve core; the joint body is vertically penetrated and connected with the valve stem 8, and the valve stem 8 is connected to the first sealing ring 30 to control the opening and closing of the valve port 35 provided on the pipe wall of the joint body. One side of the valve port 35 is connected to the inner wall of the joint body, and the other side is connected to the exhaust cavity 34, and the exhaust cavity 34 is connected to the oblique hole 4 located on the pipe wall of the joint body. The second sealing hole 18 of the third sealing ring 16 is connected to the concave ring 15 through the sealing end face 17. One side of the sealing ring 88 fits the mounting groove inside the joint body 1, and the other side is provided with a limit ring 23. The valve core 29 is provided with a ventilation concave ring 12 at one end close to the sealing ring 88, and an air hole 52 is provided on the circumference of the ventilation concave ring 12. When one end of the valve core 29 is tightly connected to the sealing ring 88, the axial front and rear space of the sealing ring 88 is isolated from ventilation. When one end of the valve core 29 extends out of the sealing ring 88, the air hole 52 is connected to the axial front and rear space of the sealing ring 88.
[0016] As a preferred structure, the pneumatic male joint connection device includes a first spring 27 and a first connecting pipe 38, which are arranged between the valve core 29 and the joint body and are sleeved on the outer periphery of the valve core. One end of the first connecting pipe 38 is connected to the thread 99 of the inner wall of the joint body. The wall of the first connecting pipe 38 is provided with a limiting hole 39, and a limiting steel ball 24 is installed in the limiting hole 39. The outer periphery of the first connecting pipe 38 is sleeved with a second spring 28, and the outer periphery of the second spring 28 is sleeved with a control pipe 5. The inner wall of the control pipe 5 is provided with an annular first limiting groove 25 and a second limiting groove 33 of different depths. The first limiting groove 25 accommodates more than half of the limiting steel ball, and the second limiting groove 33 accommodates less than half of the limiting steel ball 24. The first limiting groove and the second limiting groove are arranged front and back along the axial direction of the control pipe; one end of the second spring 28 is connected to the end face of the valve core 29, and the other end is connected to the reduced diameter step surface 13 of the inner wall of the control pipe 5.
[0017] In order to further improve the airtight effect, the joint body is provided with mounting step holes 81 at the bottom surface at both ends of the valve stem 8. The bottom surface of the mounting step hole 81 is connected to one end of the valve stem 8. The valve stem 8 extends out of the joint body at this end. The valve stem 8 passes through the first sealing seat 2 at the other end to match the second mounting step hole of the joint body. The bottom of the second mounting step hole is an exhaust cavity 34. The end of the first sealing seat 2 is connected to the first sealing ring 30. The outer periphery of the first sealing seat 2 is provided with a third sealing ring 10, which is tightly connected to the inner wall of the second mounting step hole. A fourth sealing ring 11 is provided at the place where one end of the valve stem 8 matches the mounting step hole 81.
[0018] In order to reduce the manufacturing difficulty of the exhaust structure of the pneumatic female connector, an inclined conical surface 9 is provided on the outer periphery of the connector body 1, and the taper of the inclined hole 4 is consistent with the conical surface 9. In order to achieve automatic reset performance, a first protrusion 32 located on the outer periphery of the valve stem 8 is provided on the inner side of the valve port 35, and a reset spring 6 is provided on the first protrusion 32 and the outer periphery of the valve stem 8, one end of the reset spring 6 is connected to the outer wall of the exhaust cavity 34, and the other end is connected to the boss 69 on the outer periphery of the valve stem 8.
[0019] The pneumatic female connector of the present invention is suitable for a variety of pneumatic male connectors. The specific working process is as follows: pull the control tube 5 to press down the second spring 28, and then insert the pneumatic male connector 74. The second protrusion 73 on the outer periphery of the pneumatic male connector 74 pushes the limiting steel ball 24 into the first limiting groove 25. Then, the second connecting tube 72 or the end surface 71 at the top of the pneumatic male connector 74 cooperates with the stepped third sealing ring 16. According to the different diameters and different lengths of the second connecting tube 72 at the top of the pneumatic male connector 74, the first sealing hole 20 and the second sealing hole 20 are adapted. 18 or the first sealing surface 19 realizes the adaptability of the pneumatic female connector to a variety of pneumatic male connectors. At the same time, the pneumatic male connector 74 pushes one end of the valve core 29 to extend out of the sealing ring 88. The air hole 52 connects the axial front and rear spaces of the sealing ring 88 to realize the internal airway connection between the pneumatic male connector and the pneumatic female connector. The control tube 5 resets the limiting steel ball 24 under the action of the second spring 28 to enter the second limiting groove 33. The limiting steel ball 24 cooperates with the second protrusion 73 on the outer periphery of the pneumatic male connector 74 to realize the long-term connection performance of the pneumatic male connector 74 and the pneumatic female connector. When it is necessary to separate the pneumatic male connector and the pneumatic female connector, the control tube 5 and the valve stem 8 are manually pushed at the same time. The valve stem 8 pushes the first sealing ring 30 to open the exhaust chamber 34 to exhaust and reduce the pressure through the inclined hole 4, and then the pneumatic male connector is pulled outward. The second protrusion 73 on the outer periphery of the pneumatic male connector 74 pushes the limiting steel ball 24 to enter the first limiting groove 25 again, and the pneumatic male connector 74 is separated from the pneumatic female connector. The entire connection and separation process is simple and quick, and there is no need to frequently replace pneumatic female connectors of different specifications or shut down the air source.
[0020] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.
Claims
1. A pneumatic female connector suitable for a variety of pneumatic male connectors, comprising a tubular connector body (1), characterized in that: A valve core (29) for controlling the inflow and outflow of gas is provided at one end of the joint body (1). The valve core (29) is a tubular structure coaxial with the joint body (1). One end of the valve core (29) is connected to the inner wall of the joint body (1) via a sealing ring (88) inside the joint body. The other end of the valve core (29) extends out of the joint body. The valve core cooperates with a pneumatic male joint connecting device on the outer wall of the extended part. The valve core is provided with an annular third limiting groove (14) on the inner wall of the extended part. A stepped third sealing ring (16) is embedded and installed in the third limiting groove (14). The inner wall of the third sealing ring (16) is provided with two first sealing rings of different diameters. A sealing hole (20) and a second sealing hole (18), a first sealing surface (19) is provided at the connection between the first sealing hole (20) and the second sealing hole (18), a concave ring (15) is provided on the outer wall of the third sealing ring (16), and the concave ring (15) engages with a convex ring (22) on the inner wall of the valve core; the joint body vertically penetrates and connects the valve stem (8), the valve stem (8) is connected to the first sealing ring (30) to control the opening and closing of a valve port (35) provided on the pipe wall of the joint body, one side of the valve port (35) is connected to the inner wall of the joint body, and the other side is connected to the exhaust chamber (34), and the exhaust chamber (34) is connected to the inclined hole (4) located on the pipe wall of the joint body.
2. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 1, characterized in that: The pneumatic male joint connection device comprises a first spring (27) and a first connecting pipe (38) arranged between a valve core (29) and a joint body and sleeved on the outer circumference of the valve core. One end of the first connecting pipe (38) is connected to the thread (99) on the inner wall of the joint body. A limiting hole (39) is provided on the wall of the first connecting pipe (38). A limiting steel ball (24) is installed in the limiting hole (39). A second spring (28) is sleeved on the outer circumference of the first connecting pipe (38). A control pipe (5) is sleeved on the outer circumference of the second spring (28). The inner wall of the control pipe (5) is provided with a first limiting groove (25) and a second limiting groove (33) of different depths. The first limiting groove (25) accommodates more than half of the limiting steel ball, and the second limiting groove (33) accommodates less than half of the limiting steel ball (24). The first limiting groove and the second limiting groove are arranged front and back along the axial direction of the control pipe. One end of the second spring (28) is connected to the end surface of the valve core (29), and the other end is connected to the reduced diameter step surface (13) on the inner wall of the control pipe (5).
3. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 1, characterized in that: The second sealing hole (18) of the third sealing ring (16) is connected to the concave ring (15) via a sealing end surface (17).
4. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 1, characterized in that: The joint body is matched with the valve stem (8) at both ends thereof and is respectively provided with mounting step holes (81) on the bottom surface thereof. The bottom surface of the mounting step hole (81) is matched with one end of the valve stem (8). The valve stem (8) extends out of the joint body at this end. The valve stem (8) is matched with the second mounting step hole of the joint body at the other end through the first sealing seat (2). The bottom of the second mounting step hole is an exhaust cavity (34). The end of the first sealing seat (2) is connected to the first sealing ring (30).
5. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 4, characterized in that: A third sealing ring (10) is provided on the outer periphery of the first sealing seat (2), and the third sealing ring (10) is tightly connected to the inner wall of the second mounting step hole; a fourth sealing ring (11) is provided at the position where one end of the valve stem (8) cooperates with the mounting step hole (81).
6. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 1, characterized in that: The outer periphery of the joint body (1) is provided with an inclined conical surface (9), and the taper of the inclined hole (4) is consistent with the conical surface (9).
7. A pneumatic female connector suitable for a variety of pneumatic male connectors according to claim 1, characterized in that: One side of the sealing ring (88) fits into the mounting groove inside the connecting joint body (1), and the other side is provided with a limit ring (23); the valve core (29) is provided with a venting concave ring (12) at one end close to the sealing ring (88), and air holes (52) are provided on the circumference of the venting concave ring (12); when one end of the valve core (29) is tightly connected to the sealing ring (88), the axial front and rear space of the sealing ring (88) is isolated from ventilation; when one end of the valve core (29) extends out of the sealing ring (88), the air holes (52) are connected to the axial front and rear space of the sealing ring (88).
8. The pneumatic female connector suitable for multiple pneumatic male connectors according to claim 1, characterized in that: The inner side of the valve port (35) is provided with a first protrusion (32) located on the outer periphery of the valve stem (8); the first protrusion (32) and the outer periphery of the valve stem (8) are provided with a return spring (6); one end of the return spring (6) is connected to the outer wall of the exhaust chamber (34), and the other end is connected to a boss (69) on the outer periphery of the valve stem (8).