A reversing valve assembly for a windbag pump
By adopting a combination of horn-shaped and cylindrical gas passages, guide grooves, and hollow valve cores in the reversing valve assembly of the airbag pump, the problem of slow reversing valve response speed is solved, the working efficiency of the airbag pump and the service life of the valve core are improved, and secondary damage caused by solenoid valve failure is avoided.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO BESLAN SEMICONDUCTOR TECHNOLOGY CO LTD
- Filing Date
- 2025-08-08
- Publication Date
- 2026-07-21
Smart Images
Figure CN224532953U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of pump technology, and more particularly to a reversing valve assembly for a wind bag pump. Background Technology
[0002] A pneumatic airbag pump is a new type of liquid transfer pump used to transport highly corrosive special liquids such as strong acids and alkalis. It is currently widely used in industries such as electronics, chemicals, and food processing. Most current pneumatic airbag pumps use solenoid valves to switch the direction of liquid transport, but this requires logic circuit control. If a partial malfunction occurs in the airbag pump, the solenoid valve may not stop working accordingly, but will continue to switch the operating direction, causing secondary damage to the airbag pump.
[0003] In response, Chinese patent CN116464630A proposes a reversing valve for an airbag pump. This valve allows for switching of the flow direction of the external air source, solving the problem of current solenoid valves failing to stop operation when a malfunction occurs in part of the airbag pump, thus reducing secondary damage to the pump. However, during operation, the valve core's sliding reversal relies primarily on air pressure difference, resulting in a slow response speed and reduced reversing efficiency, which impacts pump efficiency. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a reversing valve assembly for a wind bag pump, which at least solves some of the problems existing in the prior art.
[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: A reversing valve assembly for an airbag pump, installed on the airbag pump body, includes: a valve body, a valve sleeve, a valve core, and a valve plug; the valve body has a valve cavity arranged longitudinally, the valve core is slidably disposed in the valve sleeve, the valve sleeve is sleeved in the valve cavity of the valve body and fixed between the valve plugs at the upper and lower ends of the valve body; Gas passage holes are provided in the valve plugs at both the upper and lower ends, and the central axis of the gas passage hole coincides with the central axis of the valve core. The gas passage hole is divided into two sections: the section near the valve sleeve is a trumpet-shaped gas passage hole that narrows towards the valve sleeve, and the section away from the valve sleeve is a cylindrical gas passage hole.
[0006] Optionally, the inclination angle of the trumpet-shaped gas through-hole is 30-45°. This inclination angle refers to the angle between the trumpet-shaped gas through-hole and the valve core axis, i.e., the angle with the gas flow direction of the cylindrical section, controlled at 30-45°. Setting the section near the valve sleeve and valve core in a trumpet shape allows the gas flow velocity to gradually increase, enhancing the gas entry speed and pressure, thereby providing a greater driving force to move the valve core up and down, resulting in faster response and improved switching speed. Controlling the inclination angle of the trumpet-shaped gas through-hole to 30-45° maximizes the driving force of the gas and reduces gas turbulence.
[0007] Optionally, a plurality of guide grooves are also provided at intervals on the inner wall of the trumpet-shaped gas through hole, and the guide grooves are inclined along the inner wall of the trumpet-shaped gas through hole.
[0008] Optionally, the valve core is a hollow cylinder. A hollow valve core can reduce the weight of the valve stem, resulting in a faster movement speed under the same gas driving force, and thus improving the corresponding speed.
[0009] Optionally, the valve core can also be configured as having conical ends and a cylindrical middle section; both the conical and cylindrical sections are hollow structures.
[0010] Optionally, an elastic sealing layer is provided on the end face of the valve plug near the valve sleeve, and a through hole is opened at the center of the elastic sealing layer to communicate with the horn-shaped gas through hole. The diameter of the through hole is the same as the diameter of the horn-shaped gas through hole at its closing point.
[0011] Optionally, the elastic sealing layer is a single layer or multiple layers.
[0012] Optionally, the elastic sealing layer is made of an elastic material, such as PEEK or PTFE elastic rubber. The elastic sealing layer not only ensures a good seal but also provides a certain degree of cushioning, preventing damage or increased vibration and noise from collisions between the valve core and the horn-shaped gas passage during vertical movement, thus helping to extend the valve core's service life.
[0013] Optionally, the valve body is provided with a first gas channel and a second gas channel on the upper and lower ends respectively. The first gas channel and the second gas channel are connected to the air inlets of the two air bags on the main body of the air bag pump. The valve body is also provided with an external air inlet between the first gas channel and the second gas channel. The external air inlet is connected to an external air source.
[0014] Optionally, the valve sleeve is provided with a first air hole at the radial middle position, which communicates with the external air inlet end. The valve sleeve is also provided with a second air hole and a third air hole. The second air hole and the third air hole are located on the upper and lower sides of the first air hole, respectively, and communicate with the first gas channel and the second gas channel provided on the valve body.
[0015] Optionally, the peripheral wall at the junction of the valve core and the valve sleeve is provided with a first annular groove and a second annular groove respectively; the valve core can slide up and down by connecting the first air hole and the second air hole through the first annular groove, or by connecting the first air hole and the third air hole through the second annular groove to switch the gas flow path and thus achieve reversal.
[0016] The beneficial effects that this application may produce include, but are not limited to: The reversing valve assembly for an airbag pump provided in this application, by setting a combination of cylindrical and horn-shaped gas passages on the valve sleeve, allows the gas flow rate to gradually increase, providing a greater driving force to move the valve core up and down, thus improving the response speed. Controlling the inclination angle of the horn-shaped gas passages to 30-45° maximizes the driving force of the gas and reduces gas turbulence. The inner wall of the horn-shaped gas passages also has guide grooves, which quickly rectify the gas entering the passages, reducing eddies and turbulence, thereby concentrating the gas force on the valve core, enhancing the driving effect, accelerating the valve core's response speed, and also helping to reduce noise generation. Setting both ends of the valve core as cones also guides the airflow to a certain extent, reducing airflow turbulence and increasing the valve core's movement speed. Through the above settings, this application maximizes the valve core's response speed, overcoming the problem of slow reversing speed in current airbag pump reversing valves. Attached Figure Description
[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the reversing valve assembly assembled in the airbag pump in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the reversing valve assembly in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the reversing valve assembly with an external air inlet in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the reversing valve assembly in Embodiment 2 of this application; Figure 5 This is a schematic diagram of the funnel-shaped gas passage in Embodiment 3 of this application; The components and figures are labeled as follows: 1-valve body, 11-first gas passage, 12-second gas passage, 2-valve sleeve, 21-first vent, 22-second vent, 23-third vent, 3-valve core, 31-first annular groove, 32-second annular groove, 4-valve plug, 41-gas through hole, 411-cylindrical gas through hole, 412-horn-shaped gas through hole, 5-valve cavity, 6-elastic sealing layer, 7-external air inlet end, 100-reversing valve assembly, 200-pump body. Detailed Implementation
[0018] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0019] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0020] Furthermore, it should be understood in the description of this application that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0022] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0023] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.
[0024] Example 1 refer to Figure 1-3 Embodiment 1 of this application discloses a reversing valve assembly 100 for an airbag pump, which is installed on the pump body 200 of the airbag pump. The reversing valve assembly includes: a valve body 1, a valve sleeve 2, a valve core 3, and a valve plug 4. A valve cavity 5 is longitudinally arranged inside the valve body 1. The valve core 3 is slidably disposed inside the valve sleeve 2. The valve sleeve 2 is sleeved inside the valve cavity 5 of the valve body 1 and fixed between the valve plugs 4 at the upper and lower ends of the valve body 1. Gas passage holes 41 are provided in the valve plug 4. The central axis of the gas passage hole 41 coincides with the central axis of the valve core. The gas passage hole is divided into two sections: the section near the valve sleeve is a trumpet-shaped gas passage hole 412 that narrows towards the valve sleeve, and the section away from the valve sleeve is a cylindrical gas passage hole 411.
[0025] Specifically, the inclination angle of the trumpet-shaped gas through-hole 412 is 30-45°. This inclination angle refers to the angle between the trumpet-shaped gas through-hole and the valve core axis, i.e., the angle with the gas flow direction of the cylindrical section, controlled at 30-45°. Setting it in a trumpet shape near the valve sleeve and valve core section allows the gas flow velocity to gradually increase, enhancing the gas entry speed and pressure, thereby providing greater thrust to move the valve core up and down, resulting in faster response and improved switching speed. Controlling the inclination angle of the trumpet-shaped gas through-hole to 30-45° maximizes the gas's thrust and reduces gas turbulence.
[0026] Specifically, the valve core 3 is a hollow cylinder. The hollow valve core reduces the weight of the valve stem, allowing for faster movement under the same gas driving force, thus increasing the corresponding speed.
[0027] Specifically, an elastic sealing layer 6 is provided on the end face of the valve plug 4 near the valve sleeve. The elastic sealing layer 6 is a one-layer or multi-layer structure. A through hole connected to the trumpet-shaped gas through hole 412 is opened at the center of the elastic sealing layer 6. The diameter of the through hole is the same as the diameter of the closing part of the trumpet-shaped gas through hole 412.
[0028] Specifically, the elastic sealing layer 6 is made of an elastic material, such as PEEK or PTFE elastic rubber. The elastic sealing layer not only ensures a good seal but also provides a certain buffering effect, preventing the valve core from colliding with the horn-shaped gas passage during its up-and-down movement, thus avoiding damage or increased vibration and noise, and helping to extend the service life of the valve core.
[0029] Specifically, the valve body 1 is provided with a first gas channel 11 and a second gas channel 12 on the upper and lower ends respectively. The first gas channel 11 and the second gas channel 12 are connected to the air inlets of the two air bags on the main body of the air bag pump. The valve body 1 is also provided with an external air inlet 7 between the first gas channel 11 and the second gas channel 12. The external air inlet 7 is connected to an external air source.
[0030] Specifically, a first air hole 21 communicating with an external air inlet 7 is provided at the radial center of the valve sleeve 2. A second air hole 22 and a third air hole 23 are provided on the upper and lower sides of the first air hole 21, respectively. The second air hole 22 and the third air hole 23 are respectively connected to the first gas channel 11 and the second gas channel 12 provided on the valve body 1.
[0031] Specifically, the peripheral wall at the junction of the valve core 3 and the valve sleeve 2 is provided with a first annular groove 31 and a second annular groove 32 respectively; the valve core 3 can slide up and down by connecting the first air hole 21 and the second air hole 22 through the first annular groove 31, or by connecting the first air hole 21 and the third air hole 23 through the second annular groove 32 to switch the gas flow path and thus achieve reversal.
[0032] The reversing valve assembly for the airbag pump provided in this embodiment is assembled on the airbag pump, and its working process is as follows: (1) The first gas passage 11 and the second gas passage 12 in the reversing valve assembly 100 are respectively connected to the air inlet of the left chamber air bag and the air inlet of the right chamber air bag in the air bag pump. The gas through hole 41 provided on the upper valve plug 4 is connected to the air outlet of the air bag in the left chamber of the air bag pump body. The gas through hole 41 provided on the lower valve plug 4 is connected to the air outlet of the air bag in the right chamber of the air bag pump body. (2) Start the reversing valve and start the external air inlet 7. At this time, the valve core in the reversing valve assembly is located at the lower end of the valve sleeve 2 due to its own weight. At this time, the first air hole 21, the second air hole 22 are connected to the first annular groove 31. The external air source enters the air inlet of the air bag in the left chamber of the air bag pump body through the second air hole 22 and the first gas channel 11. The air bag in the left chamber expands and squeezes, causing the air bag in the right chamber to contract and exhaust. The exhaust gas enters the gas passage hole 41 on the lower valve sleeve 4 through the air outlet of the air bag in the right chamber, pushing the valve core 3 to slide upward to the top of the valve sleeve 2. (3) When the valve core 3 slides upward to the top of the valve sleeve 2, the first air hole 21 and the second air hole 22 are cut off and stop supplying air to the wind bag in the left chamber. At this time, the first air hole 21 and the third air hole 23 are connected through the second groove 32. The external air source enters the air inlet of the wind bag in the right chamber of the wind bag pump body through the third air hole 23 and the second gas channel 12. The wind bag in the right chamber expands and squeezes, causing the wind bag in the left chamber to contract and exhaust. The exhaust gas passes through the air outlet of the wind bag in the left chamber through the gas through hole 41 on the upper valve sleeve 4, pushing the valve core 3 to slide downward to the bottom of the valve sleeve 2, thus completing one reversal task.
[0033] Example 2 The reversing valve assembly structure for the airbag pump provided in this embodiment is roughly the same as that in embodiments 1 and 2, except that the valve core 3 has conical ends and a cylindrical middle section, both of which are hollow structures. Figure 3 As shown. It should be noted that the first annular groove 33 and the second annular groove 34 on the valve core are both located on the cylindrical part of the valve core 3.
[0034] The valve core 3 moves up and down within the valve sleeve. When it reaches both ends of the valve sleeve, the cone of the valve core partially engages with the horn-shaped gas passage 412. The conical shape at both ends of the valve core can also guide the airflow to a certain extent, reduce airflow turbulence, and increase the valve core's movement speed, thereby increasing the switching speed.
[0035] Example 3 The reversing valve assembly structure for the airbag pump provided in this embodiment is largely the same as that in Embodiment 1, except that multiple guide grooves 8 are spaced apart on the inner wall of the horn-shaped gas through-hole 412. The guide grooves 8 are inclined along the inner wall of the horn-shaped gas through-hole 412, such as... Figure 4 As shown.
[0036] The flow guide groove allows the gas entering the funnel-shaped gas orifice to be rectified as quickly as possible, guiding the gas to flow in the predetermined direction. This avoids eddies and turbulence in the gas within the orifice caused by narrowing, reducing gas energy loss. As a result, the gas force acts more concentrated on the valve core, enhancing the pushing effect on the valve core and accelerating its response speed. Reducing airflow turbulence also helps to reduce noise generation.
[0037] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.
[0038] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. A reversing valve assembly for an airbag pump, mounted on the airbag pump body, characterized in that, include: The valve body comprises a valve sleeve, a valve core, and a valve plug; the valve body has a longitudinally arranged valve cavity, the valve core is slidably disposed within the valve sleeve, and the valve sleeve is fitted within the valve cavity of the valve body and fixed between the valve plugs at the upper and lower ends of the valve body; Gas passage holes are provided in the valve plugs at both the upper and lower ends, and the central axis of the gas passage hole coincides with the central axis of the valve core. The gas passage hole is divided into two sections: the section near the valve sleeve is a trumpet-shaped gas passage hole that narrows towards the valve sleeve, and the section away from the valve sleeve is a cylindrical gas passage hole.
2. The reversing valve assembly for a wind pump according to claim 1, characterized in that, The inclination angle of the trumpet-shaped gas passage is 30-45°.
3. The reversing valve assembly for a windshield pump according to claim 2, characterized in that, The inner wall of the trumpet-shaped gas through hole is also provided with multiple guide grooves at intervals, and the guide grooves are inclined along the inner wall of the trumpet-shaped gas through hole.
4. The reversing valve assembly for a windshield pump according to claim 1, characterized in that, The valve core is a hollow cylinder.
5. The reversing valve assembly for a wind pump according to claim 4, characterized in that, The valve core can also be configured as having conical ends and a cylindrical middle section; both the conical and cylindrical sections are hollow structures.
6. The reversing valve assembly for a windshield pump according to claim 5, characterized in that, An elastic sealing layer is provided on the end face of the valve plug near the valve sleeve. A through hole is opened at the center of the elastic sealing layer, which is connected to the horn-shaped gas through hole. The diameter of the through hole is the same as the diameter of the horn-shaped gas through hole at the closing end.
7. The reversing valve assembly for a windshield pump according to claim 6, characterized in that, The elastic sealing layer is a single layer or multiple layers.
8. The reversing valve assembly for a windshield pump according to claim 1, characterized in that, The valve body has a first gas channel and a second gas channel on its upper and lower sides, respectively. The first gas channel and the second gas channel are connected to the air inlets of the two air bags on the main body of the air bag pump. The valve body also has an external air inlet located between the first gas channel and the second gas channel. The external air inlet is connected to an external air source.
9. The reversing valve assembly for a windshield pump according to claim 1, characterized in that, The valve sleeve has a first air hole at the radial center position that communicates with the external air inlet. A second air hole and a third air hole are respectively provided on the upper and lower sides of the first air hole. The second air hole and the third air hole are respectively connected to the first gas channel and the second gas channel provided on the valve body.
10. The reversing valve assembly for a windshield pump according to claim 9, characterized in that, The valve core and the valve sleeve are respectively provided with a first annular groove and a second annular groove on the peripheral wall at the junction; the valve core can slide up and down by connecting the first air hole and the second air hole through the first annular groove, or by connecting the first air hole and the third air hole through the second annular groove to switch the gas flow path and thus realize the reversal.