Anti-falling pneumatic connector

Abstract

The invention relates to an anti-falling pneumatic connector which comprises a connector shell, a connecting seat is arranged in a first end, a vent hole is formed in the connecting seat, a valve rod is arranged below the vent hole and sleeved with a guide sleeve, an air inlet cavity is formed in the top of the valve rod, an air guide hole is formed in the air inlet cavity, and an air guide path is arranged in the valve rod. An outlet of the gas guide path is located in the side face of the valve rod and surrounded by the guide sleeve, a gas storage cavity is formed in the side face, making contact with the valve rod, of the guide sleeve, and when gas enters the vent hole, gas flows through the gas guide path and the outlet from the gas guide hole to the gas storage cavity, and the guide sleeve is pressed on the inner wall of the connector shell. The air guide path and the air guide hole are formed in the valve rod, an air source is led into the air storage cavity formed in the guide sleeve through the air guide hole and the air guide path, the guide sleeve is tightly pressed on the inner wall of the connector shell under the action of air pressure, and the reliability, stability and sealing performance of the connector are improved.

Description

Technical Field

[0001] The invention relates to the technical field of pneumatic joints, and in particular to an anti-falling pneumatic joint. Background Art

[0002] The working principle of the cylinder anti-fall joint mainly relies on its built-in valve structure and special design to ensure that the cylinder will not drop accidentally when the air source is lost, thereby improving production safety and stability.

[0003] The performance of the cylinder anti-fall joint, as a key component for connecting the air pipe and transmitting gas, directly affects the stability and safety of the entire pneumatic system. Traditional pneumatic joints have some shortcomings in structural design. For example, in terms of the firmness of the air pipe connection, when it is pulled by external force or the system vibrates, the air pipe is easy to fall off from the joint, which may cause serious safety accidents in some occasions with extremely high safety requirements, such as aerial work equipment, large-scale automated production lines, etc. At the same time, traditional pneumatic joints also need to be improved in terms of sealing, flexibility of gas on-off control, etc., and cannot meet the needs of modern industry for efficient, safe and stable operation. Therefore, it is of great practical significance to develop a pneumatic joint that can effectively prevent the air pipe from falling and has good sealing and reliable gas on-off control functions. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-fall pneumatic joint to solve the problems of poor air pipe connection stability, insufficient sealing and insufficient intelligent gas on-off control of existing pneumatic joints, so as to improve the safety and reliability of pneumatic systems in various application scenarios.

[0005] To achieve the above object, the present invention provides the following technical solutions: A fall-proof pneumatic joint, characterized in that it includes a joint shell, the joint shell has a first air connection hole, a second air connection hole and a third air connection hole, the first air connection hole is located at the first end of the joint shell, the second air connection hole and the third air connection hole are respectively located at the second end and the third end of the joint shell, a connecting seat is arranged in the first end, an air vent is arranged in the connecting seat, a valve stem is arranged below the air vent, the second end and the third end are used to connect an air pipe, a guide cavity is arranged between the second end and the third end, a valve core cooperating with the valve stem is arranged in the guide cavity, and the air intake of the air vent When the air is released from the vent hole, the valve core is reset under the action of the spring, wherein a guide sleeve is provided on the valve stem, an air inlet cavity is provided on the top of the valve stem, an air guide hole is provided in the air inlet cavity, an air guide path is provided in the valve stem, an outlet of the air guide path is located on the side of the valve stem, the outlet is surrounded by the guide sleeve, and an air storage cavity is provided on the side of the guide sleeve in contact with the valve stem. When air is introduced into the vent hole, the gas flows from the air guide hole through the air guide path and the outlet to the air storage cavity, and presses the guide sleeve against the inner wall of the joint housing.

[0006] The present invention is further arranged that the valve stem includes a head portion, a middle portion and a tail portion, the air inlet cavity is located in the head portion, the air guide hole is located at the end of the air inlet cavity, the air guide path and the outlet are located in the middle portion, the air guide sleeve is located in the middle portion, and the tail portion acts on the valve core to contact or separate.

[0007] The present invention is further arranged that a sealing groove is formed toward the center of the head, and a Y-shaped sealing ring is arranged in the sealing groove.

[0008] The present invention is further provided that the valve core is connected to a valve seat, a groove for movement of the valve core is provided at the center of the valve seat, the valve core includes a moving seat and a moving rod, the moving seat wraps the end of the moving rod, and a sealing protrusion is formed on the moving seat for sealing the flow port of the guide cavity, so that the air pipe between the second end and the third end is not connected.

[0009] The present invention is further arranged that a release sleeve, a retaining spring, a first retaining spring, a second retaining spring and a sealing ring are provided in the second end and the third end, the first retaining spring cooperates with the release sleeve, a notch for installing the retaining spring is formed on the first retaining spring, the first retaining spring cooperates with the second retaining spring, and the second retaining spring cooperates with the sealing ring.

[0010] The present invention is further arranged that a connecting port 1 and a connecting port 2 connected to the second end are respectively formed on both sides of the guide cavity, a flow port is formed between the connecting port 1 and the connecting port 2, the connecting port 2 is located on one side of the third end, and a first sleeve for fixing the trachea is provided at its outlet, a mounting groove is opened on the side of the first sleeve, a fixing rod made of a flexible material is provided in the groove, and a steel ball is provided on the fixing rod.

[0011] The present invention further provides that a second sleeve is arranged in the sealing ring at the second connecting port, a notch is opened on the side of the second sleeve, a fixing rod made of a flexible material is arranged in the notch, and a steel ball is arranged on the fixing rod.

[0012] The present invention is further provided that the retaining spring includes a mounting portion arranged along a circumferential direction and an acting portion acting on the trachea, the mounting portion is arranged obliquely outward from the center of the retaining spring, the acting portion is arranged toward the center of the retaining spring, an area for the trachea to pass through is formed between the end faces of the acting portion, and each mounting portion is connected to two acting portions.

[0013] The present invention is further provided that the acting portion of the retaining spring is connected to a trachea sleeve, a rectangular groove along the length direction of the trachea sleeve is opened on the side surface of the trachea sleeve, the acting portion of the retaining spring is clamped in the rectangular groove and extends into the trachea sleeve, when the trachea is installed, the trachea passes through the trachea sleeve, and the acting portion acts on the surface of the trachea in the trachea sleeve.

[0014] The present invention further provides that a return spring is arranged between the valve seat and the moving rod; or a return spring is arranged in the notch to act on the bottom of the moving rod.

[0015] The beneficial effects of the present invention are as follows: based on the problems existing in the prior art in the process of movement of the valve stem: for example, the long-term friction between the valve stem and the inner wall leads to a decrease in the sealing performance. The present invention provides a guide sleeve, which can first guide the valve stem during movement, and when the valve stem moves in the guide sleeve, the presence of the guide sleeve avoids contact between the valve stem and the inner wall surface of the joint, reduces wear, and the presence of the guide sleeve can also ensure that there is no deviation when the valve stem moves; secondly, the present invention also provides an air guide path and an air guide hole on the valve stem, and introduces the air source into the air storage cavity formed on the guide sleeve through the air guide hole and the air guide path, and presses the guide sleeve against the inner wall of the joint housing through the action of air pressure, thereby improving its reliability, stability and sealing performance, and further improving the reliability and stability of the valve stem during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a stereogram of an embodiment of the present invention.

[0017] Figure 2 Schematic diagram of the internal structure of an embodiment of the present invention.

[0018] Figure 3 It is a schematic diagram of the structure of the valve seat and the valve core according to an embodiment of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the retaining spring and the trachea sleeve according to an embodiment of the present invention.

[0020] Reference numerals: 10. Connector housing; 20. First air connection hole; 30. Second air connection hole; 40. Third air connection hole; 50. First end; 60. Second end; 70. Third end; 80. Connecting seat; 801. Air vent; 90. Valve stem; 901. Head; 902. Middle; 903. Tail; 100. Flow guide chamber; 110. Valve core; 1101. Moving seat; 1102. Moving rod; 120. Guide sleeve; 130. Air inlet chamber; 140. Air guide hole; 150. Air guide path; 160. Outlet; 170. Air storage chamber; 180. Sealing groove; 190, Y-type sealing ring; 200, valve seat; 210, notch; 220, sealing protrusion; 230, flow port; 240, release sleeve; 260, first buckle; 270, second buckle; 280, sealing ring; 290, connecting port 1; 300, connecting port 2; 310, installation notch; 320, steel ball; 330, retaining spring; 3301, installation part; 3302, action part; 340, trachea sleeve; 3401, rectangular groove; 350, return spring; 360, first sleeve; 370, second sleeve; DETAILED DESCRIPTION

[0021] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0022] like Figure 1-Figure 4 As shown, the present invention provides an anti-fall pneumatic joint, including a joint housing 10, the joint housing 10 is made of aluminum alloy material, which has good strength and corrosion resistance; or made of polyamide material, which has good mechanical strength, wear resistance and self-lubrication In this embodiment, the connector shell 10 has a first air connection hole 20, a second air connection hole 30 and a third air connection hole 40, the first air connection hole 20 is located at the first end 50 of the connector shell 10, the second air connection hole 30 and the third air connection hole 40 are respectively located at the second end 60 and the third end 70 of the connector shell 10, and the first end 50 is provided with a connecting seat 80 for connecting other accessories or air pipes; the connecting seat 80 is provided with an air vent 801, and a valve stem 90 is provided below the air vent 801, the second end 60 and the third end 70 are used to connect the air pipe, a guide cavity 100 is provided between the second end 60 and the third end 70, and a valve core 110 cooperating with the valve stem 90 is provided in the guide cavity 100, and when air is introduced into the air vent 801, the valve stem 90 pushes the valve The movement of the core 110 makes the air pipes in the second end 60 and the third end 70 communicate with each other. When the air vent 801 is cut off, the valve core 110 is reset under the action of the spring, wherein the valve stem 90 is sleeved with a guide sleeve 120, the top of the valve stem 90 is provided with an air inlet cavity 130, the air inlet cavity 130 is provided with an air guide hole 140, the valve stem 90 is provided with an air guide path 150, the outlet 160 of the air guide path 150 is located on the side of the valve stem 90, the outlet 160 is surrounded by the guide sleeve 120, and the side of the guide sleeve 120 in contact with the valve stem 90 is provided with a groove to form an air storage cavity 170. When the air vent 801 is intaken, the gas flows from the air guide hole 140 through the air guide path 150 and the outlet 160 to the air storage cavity 170, and presses the guide sleeve 120 against the inner wall of the joint housing 10.

[0023] Based on the problems existing in the prior art in the process of moving the valve stem 90: for example, the long-term friction between the valve stem 90 and the inner wall leads to a decrease in sealing performance. In the present invention, the guide sleeve 120 is provided to first guide the valve stem 90 during the movement, and when the valve stem 90 moves in the guide sleeve 120, the contact between the valve stem 90 and the inner wall of the joint is avoided due to the existence of the guide sleeve 120, reducing wear, and the existence of the guide sleeve 120 can also ensure that the valve stem 90 will not deviate when moving; secondly, the present invention also opens an air guide path 150 and an air guide hole 140 on the valve stem 90, and introduces the air source into the air storage chamber 170 formed on the guide sleeve 120 through the air guide hole 140 and the air guide path 150. Through the action of air pressure, the guide sleeve 120 is pressed against the inner wall of the joint housing 10, thereby improving its reliability, stability and sealing performance, realizing the function of compensating sealing, and further improving the reliability and stability of the valve stem 90 when moving. The guide sleeve 120 is made of wear-resistant polytetrafluoroethylene material.

[0024] The valve stem 90 includes a head 901, a middle part 902 and a tail 903. The air inlet cavity 130 is located in the head 901, the air guide hole 140 is located at the end of the air inlet cavity 130, the air guide path 150 and the outlet 160 are located in the middle part 902, the air guide sleeve is located in the middle part 902, and the tail 903 acts on the valve core 110 to contact or separate. The head 901 forms a sealing groove 180 toward its center, and a Y-shaped sealing ring 190 is arranged in the sealing groove 180. When the air inlet cavity 130 is inlet, the gas acts on the side wall of the air inlet cavity 130, and then the side wall receives the force acting on the Y-shaped sealing ring 190, so that the side wall can fit the valve stem 90 to achieve better sealing performance.

[0025] In the present invention, the valve core 110 is connected to the valve seat 200, and the center of the valve seat 200 is provided with a groove 210 for the valve core 110 to move. The valve core 110 includes a movable seat 1101 and a movable rod 1102. The movable seat 1101 wraps the end of the movable rod 1102, and a sealing protrusion 220 is formed on the movable seat 1101 for sealing the flow port 230 of the guide cavity 100, so that the air pipe between the second end 60 and the third end 70 is not connected. When the valve stem 90 moves toward the side of the movable seat 1101, the flow port 230 is opened, so that the air pipe between the second end 60 and the third end 70 is connected.

[0026] In addition, in terms of the firmness of the air pipe connection, when it is pulled by external force or the system vibrates, the air pipe is easy to fall off from the joint, which may cause serious safety accidents in some occasions with extremely high safety requirements, such as aerial work equipment, large-scale automated production lines, etc. Therefore, the present invention adopts the following technical solutions: A release sleeve 240, a retaining spring 330250, a first retaining spring 260, a second retaining spring 270 and a sealing ring 280 are provided in the second end 60 and the third end 70 of the connector housing 10. The first retaining spring 260 cooperates with the release sleeve 240. A notch 210 for installing the retaining spring 330250 is formed on the first retaining spring 260. The first retaining spring 260 cooperates with the second retaining spring 270. The second retaining spring 270 cooperates with the sealing ring 280.

[0027] On the basis of the above technical solution, this embodiment further forms a communication port 1 290 and a communication port 2 300 connected to the second end 60 on both sides of the guide cavity 100, and a flow port 230 is formed between the communication port 1 and the communication port 2 300. The communication port 2 300 is located on one side of the third end 70, and a first sleeve 360 ​​for fixing the air pipe is provided at its outlet 160. A mounting notch 310210 is provided on the side of the first sleeve 360. A fixing rod made of a flexible material is provided in the notch 210, and a steel ball 320 is provided on the fixing rod. Flexible material The communication port 1 290 is provided with a second sleeve 370 in the sealing ring 280, and a notch 210 is provided on the side of the second sleeve 370. A fixing rod made of a flexible material is provided in the notch 210, and a steel ball 320 is provided on the fixing rod. The flexible material is a flexible plastic, such as polyurethane.

[0028] The retaining spring 330250 includes a mounting portion 3301 arranged along the circumferential direction and an acting portion 3302 acting on the trachea, the mounting portion 3301 is arranged to be inclined outward from the center of the retaining spring 330250, the acting portion 3302 is arranged toward the center of the retaining spring 330250, and an area for the trachea to pass through is formed between the end surfaces of the acting portion 3302, and each mounting portion 3301 is connected to two acting portions 3302.

[0029] In addition, during actual use, the trachea needs to be fixed when it enters the second end 60 or the third end 70, and the acting portion 3302 of the retaining spring 330250 is connected to the trachea sleeve 340. The side of the trachea sleeve 340 is provided with a rectangular groove 3401 along its length direction. The acting portion 3302 of the retaining spring 330250 is clamped in the rectangular groove 3401 and extends into the trachea sleeve 340. When the trachea is installed, the trachea passes through the trachea sleeve 340, and the acting portion 3302 acts on the surface of the trachea in the trachea sleeve 340, thereby achieving reliable fixation of the trachea.

[0030] A return spring 350 is disposed between the valve seat 200 and the moving rod 1102, or a return spring 350 is disposed in the notch 210 to act on the bottom of the moving rod 1102. The selection is made according to actual needs.

[0031] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0032] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0033] The above description shows and describes several preferred embodiments of the present invention, but as before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept of this article through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A fall-proof pneumatic joint, characterized in that: The invention comprises a joint shell, wherein the joint shell has a first air connection hole, a second air connection hole and a third air connection hole, wherein the first air connection hole is located at the first end of the joint shell, the second air connection hole and the third air connection hole are located at the second end and the third end of the joint shell respectively, a connecting seat is arranged in the first end, an air vent is arranged in the connecting seat, a valve stem is arranged below the air vent, the second end and the third end are used to connect an air pipe, a flow guide cavity is arranged between the second end and the third end, a valve core cooperating with the valve stem is arranged in the flow guide cavity, and when air is introduced into the air vent, the valve stem pushes The movement of the valve core makes the air pipes in the second end and the third end communicate with each other. When the air vent is cut off, the valve core is reset under the action of the spring. A guide sleeve is provided on the valve stem, an air inlet cavity is provided on the top of the valve stem, an air guide hole is provided in the air inlet cavity, an air guide path is provided in the valve stem, an outlet of the air guide path is located on the side of the valve stem, the outlet is surrounded by the guide sleeve, and an air storage cavity is provided on the side of the guide sleeve in contact with the valve stem. When air is taken in through the air vent, the gas flows from the air guide hole through the air guide path and the outlet to the air storage cavity, and presses the guide sleeve against the inner wall of the joint housing.

2. The anti-fall pneumatic joint according to claim 1, characterized in that: The valve stem includes a head, a middle part and a tail part, the air inlet cavity is located in the head part, the air guide hole is located at the end of the air inlet cavity, the air guide path and the outlet are located in the middle part, the air guide sleeve is located in the middle part, and the tail part acts on the valve core to contact or separate.

3. The anti-fall pneumatic joint according to claim 2, characterized in that: The head is formed with a sealing groove toward its center, and a Y-shaped sealing ring is arranged in the sealing groove.

4. The anti-fall pneumatic joint according to claim 1, characterized in that: The valve core is connected to a valve seat, a groove for movement of the valve core is arranged at the center of the valve seat, the valve core comprises a moving seat and a moving rod, the moving seat wraps the end of the moving rod, and a sealing protrusion is formed on the moving seat for sealing the flow port of the guide cavity, so that the air pipe between the second end and the third end is not connected.

5. The anti-fall pneumatic joint according to claim 1, characterized in that: A release sleeve, a retaining spring, a first retaining spring, a second retaining spring and a sealing ring are disposed in the second end and the third end. The first retaining spring cooperates with the release sleeve. A notch for installing the retaining spring is formed on the first retaining spring. The first retaining spring cooperates with the second retaining spring. The second retaining spring cooperates with the sealing ring.

6. The anti-fall pneumatic joint according to claim 1, characterized in that: A connecting port 1 and a connecting port 2 connected to the second end are respectively formed on both sides of the guide cavity, a flow port is formed between the connecting port 1 and the connecting port 2, the connecting port 2 is located on one side of the third end, and a first sleeve for fixing the air pipe is arranged at its outlet, a mounting groove is opened on the side of the first sleeve, a fixing rod made of a flexible material is arranged in the groove, and a steel ball is arranged on the fixing rod.

7. The anti-fall pneumatic joint according to claim 5, characterized in that: The second communicating port is provided with a second sleeve in the sealing ring, a notch is provided on the side of the second sleeve, a fixing rod made of a flexible material is provided in the notch, and a steel ball is provided on the fixing rod.

8. The anti-fall pneumatic joint according to claim 5, characterized in that: The retaining spring includes a mounting portion arranged along the circumferential direction and an acting portion acting on the trachea, the mounting portion is arranged obliquely outward from the center of the retaining spring, the acting portion is arranged toward the center of the retaining spring, an area for the trachea to pass through is formed between the end faces of the acting portion, and each mounting portion is connected to two acting portions.

9. The anti-fall pneumatic joint according to claim 8, characterized in that: The action part of the retaining spring is connected to the trachea sleeve, and a rectangular groove along the length direction of the trachea sleeve is opened on the side of the trachea sleeve. The action part of the retaining spring is clamped in the rectangular groove and extends into the trachea sleeve. When the trachea is installed, the trachea passes through the trachea sleeve, and the action part acts on the surface of the trachea in the trachea sleeve.

10. The anti-fall pneumatic joint according to claim 4, characterized in that: A return spring is arranged between the valve seat and the moving rod; or a return spring is arranged in the notch to act on the bottom of the moving rod.

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