Plug-in switching valve

Abstract

This utility model discloses a plug-in switching valve, comprising a first straight pipe section and a second straight pipe section of integral structure. One end of the second straight pipe section has an inlet, and the other end connects to the wall of the first straight pipe section. One end of the first straight pipe section has an outlet, and the other end connects to a motor. A valve port is located inside the first straight pipe section. The motor has a main shaft, and a valve core that mates with the valve port is located at the end of the main shaft. The motor housing is an injection-molded component, and a plug-in interface device is located within the injection-molded component. This utility model achieves rapid installation of the switching valve through the plug-in interface device on the motor housing, and improves the reliability of the switching valve's opening and closing and its service life by employing a valve core structure formed at the end of the main shaft, in conjunction with the valve port in the first straight pipe section.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a plug-in switching valve. Background Technology

[0002] In the field of valve technology, switching valves are common devices used to control the flow direction and opening / closing of fluids between different pipelines. Traditional switching valves mostly employ ball valve structures or valve core structures with relatively complex pipeline configurations. While these structures can achieve basic fluid control functions, they have many shortcomings in practical applications. For example, the installation process of traditional switching valves is cumbersome, requiring multiple connecting parts, increasing installation time and cost; at the same time, the complex structure can easily lead to decreased sealing performance and leakage problems. Furthermore, the motor connection method of traditional switching valves is mostly fixed, lacking flexibility and failing to adapt to the needs of different installation environments. How to simplify the structure and facilitate the installation of switching valves, while improving their sealing performance and adaptability, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this application is to provide a plug-in switching valve and its components, which have the advantages of simple structure, convenient installation, good sealing performance and strong adaptability.

[0004] This application provides a plug-in switching valve, comprising a first straight pipe section and a second straight pipe section of integral structure. One end of the second straight pipe section has an inlet, and the other end connects to the wall of the first straight pipe section. One end of the first straight pipe section has an outlet, and the other end connects to a motor. A valve port is located inside the first straight pipe section. The motor has a main shaft, and a valve core that mates with the valve port is located at the end of the main shaft. The motor housing is an injection-molded component with a plug-in interface device. This invention achieves rapid installation of the switching valve through the plug-in interface device on the motor housing, and improves the reliability of the switching valve's opening and closing and its service life by employing a valve core structure formed at the end of the main shaft, in conjunction with the valve port inside the first straight pipe section.

[0005] The main shaft has a thread on its outer circumference, and the threaded outer circumference is fixedly connected to the nut adjustment seat on the inner wall of the first straight pipe section. During the rotation driven by the motor, the main shaft moves back and forth along the axial direction of the nut adjustment seat to control the opening and closing of the valve port.

[0006] The nut adjusting seat is a tubular structure. The outer wall of the tubular structure is sealed to the inner wall of the first straight pipe section through a positioning ring and a first sealing ring. The inside of the tubular structure is sealed to the outer wall of the main shaft through parallel second and third sealing rings.

[0007] The first straight pipe section is connected to a motor with a flange at one end. The flange is connected to one side of the mounting plate by a positioning screw, and the other side of the mounting plate is connected to the motor.

[0008] The aforementioned plug-in interface device includes an upper plug-in interface device and a lower plug-in interface device integrally formed with the injection-molded structural component; the upper plug-in interface device includes a first plug-in slot located on the upper side of the motor; the lower plug-in interface device includes a second plug-in slot located on the lower side of the motor.

[0009] The second insertion slot includes a first slot wall and a second slot wall that are parallel to each other on the axial direction. The first slot wall includes a V-shaped first slot top plate, and vertical slot walls are provided on both sides of the V-shaped slot top plate. The second slot wall includes a horizontal second slot top plate, and the two sides of the second slot top plate are turned down to form a third insertion slot.

[0010] As can be seen from the above, the plug-in switching valve and its components provided in this application simplify the installation steps and improve the sealing performance through the design of the first and second straight pipe sections of the integrated structure, combined with the plug-in interface device of the injection-molded structural parts. At the same time, precise control is achieved through the cooperation between the motor-driven spindle and the valve port. It has the advantages of simple structure, convenient installation, good sealing performance and strong adaptability. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of a plug-in switching valve according to the present invention;

[0013] Figure 2 This is a bottom view schematic diagram of the plug-in switching valve of this utility model;

[0014] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point AA. Detailed Implementation

[0015] The following will refer to the appendix to this application. Figure 1-3The technical solutions in this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0016] In existing technologies, ball valves or complex valve core structures have long been used for fluid control in the field of valve technology. These structures typically contain multiple independent components, leading to cumbersome assembly processes. In fluid systems that require frequent replacement or maintenance, the piping connection methods of traditional switching valves are prone to leakage risks, and the interface design between the motor and the valve body presents difficulties in installation and positioning.

[0017] To address these issues, researchers discovered that the complex assembly structure of traditional switching valves was the primary cause of low installation efficiency. Analysis revealed that designing the straight pipe section as a single, molded structure could reduce the number of connection points and lower the probability of leakage. Simultaneously, the motor housing, manufactured using injection molding and integrating a plug-in interface, enables rapid positioning and installation. Based on this, a modular integration of the valve body and drive unit was proposed, using axial movement to control the valve opening and closing, thus simplifying the mechanical transmission path.

[0018] Therefore, this application proposes a plug-in switching valve, including a first straight pipe section 12 and a second straight pipe section 13 of integral structure. One end of the second straight pipe section 13 is provided with an inlet 33, and the other end is connected to the pipe wall of the first straight pipe section 12. One end of the first straight pipe section is provided with an outlet 32, and the other end is connected to a motor 7. A valve port 18 is provided inside the first straight pipe section. The motor 7 is provided with a main shaft 20, and the end of the main shaft 20 is provided with a valve core 19 that matches the valve port. The housing of the motor 7 is an injection-molded structural component 9, and the injection-molded structural component 9 is provided with a plug-in interface device.

[0019] The first and second straight pipe sections, forming a single integrated structure, refer to seamless pipe bodies created through casting or injection molding processes. Specifically, copper alloy die casting can be used, eliminating assembly gaps associated with traditional flange connections. The inlet is located at the end of the second straight pipe section and can be designed as a standardized threaded interface for quick connection to external pipelines. The valve port is located axially inside the first straight pipe section and can employ a tapered sealing surface structure to create a linear contact seal with the valve core. The injection-molded structural component refers to the motor housing, made of engineering plastics, on which plug-in interface devices can be directly molded.

[0020] Specifically, after the fluid enters through the inlet of the second straight pipe section, it flows into the internal cavity of the first straight pipe section along the pipe wall connection. When the motor drives the spindle to rotate, the valve core moves axially to contact or disengage from the valve port, thereby controlling the opening and closing of the fluid channel. The plug-in interface device on the injection-molded structural component allows for quick plug-and-play connection with an external control unit, for example, by using a snap-fit ​​slot structure, eliminating the need for additional positioning tools during motor installation. The connection end between the first straight pipe section and the motor is fixed by a flange structure to ensure uniform axial force distribution.

[0021] Compared to existing technologies, traditional switching valves require separate machining of pipe connections and assembly of sealing elements. This solution eliminates multiple connection points through a one-piece molded pipe section, reducing the risk of fluid leakage. Existing technologies typically require bolt tightening and gaskets for motor installation; this solution uses an injection-molded plug-in interface device, allowing the motor to be directly embedded in the valve body structure, reducing assembly steps. Furthermore, traditional valve cores often employ a rotary seal structure; this solution controls the valve port through the axial movement of the spindle, avoiding the wear problem of rotary seals.

[0022] Through the above technical solutions, this application achieves an overall simplification of the valve body structure, effectively improving the sealing reliability of the fluid channel. The plug-in interface device eliminates the need for precise alignment during motor installation, significantly improving assembly efficiency. The injection-molded motor housing not only reduces manufacturing costs but also ensures the consistency of interface dimensions, avoiding installation difficulties caused by processing errors.

[0023] This application further proposes that the main shaft 20 is threaded on its outer periphery, and the threaded outer periphery is fixedly connected to the nut adjusting seat 16 on the inner wall of the first straight pipe section 12. During the rotation driven by the motor 7, the main shaft 20 moves back and forth along the nut adjusting seat 16 to control the opening and closing of the valve port 18.

[0024] The thread refers to the helical protrusion structure machined onto the outer surface of the spindle, which can be implemented using trapezoidal or rectangular threads, used to convert rotary motion into linear motion. The nut adjusting seat is a tubular component fixed to the inner wall of the first straight pipe section, which can be made of copper alloy or engineering plastic. Its inner wall has a threaded structure that matches the spindle thread, used to restrict the spindle to move only axially. The opening and closing of the axial motion control valve port refers to the valve core connected to the end of the spindle moving linearly with the spindle, sealing or opening the fluid passage by contacting or disengaging from the valve port edge.

[0025] Specifically, when the motor starts, it drives the main shaft to rotate. Since the adjusting nut is fixed to the inner wall of the first straight pipe section, the threaded engagement between the main shaft and the adjusting nut forces the main shaft to move axially. When the main shaft moves forward, the valve core presses against the valve port to achieve a seal; when the main shaft rotates in the opposite direction, the valve core moves away from the valve port, forming a fluid passage. This movement process maintains positional stability through the mechanical self-locking characteristic of the threaded pair, preventing fluid pressure from interfering with the valve core's state.

[0026] Compared to existing technologies, traditional switching valves often use gear transmission or linkage mechanisms to achieve valve core displacement, resulting in complex structures and susceptibility to seal failure due to wear. This solution directly converts the motor's rotational power into linear motion through the engagement of threads and nuts, simplifying the transmission chain, reducing the number of parts, and improving long-term reliability due to the high wear resistance of the threaded pair.

[0027] Through the above technical solution, this application achieves precise control of valve port opening and closing, reduces assembly complexity, avoids the problem of error accumulation caused by multi-stage transmission, and enhances sealing stability through the thread self-locking characteristic.

[0028] This application further proposes that the nut adjusting seat 16 is a tubular structure, the outer wall of the tubular structure is sealed to the inner wall of the first straight pipe section 12 through the positioning ring 21 and the first sealing ring 22, and the inner wall of the tubular structure is sealed to the outer wall of the main shaft 20 through the parallel second sealing ring 17 and the third sealing ring 34.

[0029] The positioning ring is an annular component used to limit the radial displacement of the nut adjusting seat. It can be implemented using an annular snap-fit ​​structure made of metal or engineering plastic, with its outer diameter forming an interference fit with the inner wall of the first straight pipe section to fix its axial position. The first sealing ring is an elastic seal placed between the positioning ring and the inner wall of the first straight pipe section, used to prevent fluid leakage along the outer wall of the tubular structure. The second and third sealing rings are double-layer sealing assemblies arranged axially along the main shaft. They can be implemented using a combination of PTFE lip seals and spring-loaded seals, enhancing the dynamic sealing effect during the main shaft's movement through this double-sealing structure.

[0030] Specifically, the tubular structure of the nut adjusting seat is rigidly connected to the first straight pipe section via a locating ring. Simultaneously, a first sealing ring fills the assembly gap between the locating ring and the pipe wall, forming the first fluid sealing barrier. Inside the tubular structure, the second and third sealing rings are spaced apart along the main shaft axial direction. When the main shaft rotates and generates axial displacement, the second sealing ring primarily provides static sealing under low-pressure conditions, while the third sealing ring compensates for the main shaft displacement through elastic deformation, ensuring that high-pressure fluid does not leak along the outer wall of the main shaft.

[0031] Through the above technical solution, this application effectively solves the problem of fluid leakage caused by seal failure during spindle movement. By combining the positioning ring and the double sealing ring, the sealing reliability is improved while ensuring assembly accuracy.

[0032] As a preferred structural feature, the first straight pipe section 12 is connected to the motor 7 at one end and has a flange 23. The flange 23 is connected to one side of the mounting plate 10 by a positioning screw 14, and the other side of the mounting plate 10 is connected to the motor 7.

[0033] The flange refers to the annular flange structure formed by extending outward from the end of the first straight pipe section. It can be achieved using a stamping process and serves as a positioning reference surface for the mounting plate. The positioning screw is a threaded fastener used to detachably connect the flange to the mounting plate. The mounting plate is a flat plate structure with through holes, which can be made of metal and serves as a transitional connection between the motor and the first straight pipe section.

[0034] Through the above technical solution, this application realizes the quick assembly and disassembly of the motor and the first straight pipe section, reduces the dependence on operational precision during the assembly process, and at the same time, the transition connection design of the mounting plate effectively isolates the impact of motor vibration on the pipeline sealing performance and extends the overall service life of the valve.

[0035] This application further proposes a plug-in interface device including an upper plug-in interface device and a lower plug-in interface device integrally formed with the injection-molded structural part 9; the upper plug-in interface device includes a first plug-in slot 8 located on the upper side of the motor 7; the lower plug-in interface device includes a second plug-in slot 2 located on the lower side of the motor 7.

[0036] The upper plug-in interface device refers to the connection structure located on the top of the motor, which can be implemented by designing a corresponding slot structure in the injection mold. Its function is to provide a top docking interface for external pipelines. The lower plug-in interface device refers to the connection structure located at the bottom of the motor, which can be implemented by designing a groove with guiding features in the injection mold. Its function is to enable quick positioning and fixation of the bottom pipelines. The first plug-in slot is a recessed structure located on the top of the motor, which can be implemented using a U-shaped cross-section design. Its function is to accommodate and fix the plug-in end of the top connector. The second plug-in slot is a recessed structure located at the bottom of the motor, which can be implemented using an asymmetrical cross-section design. Its function is to prevent incorrect pipeline connection direction through shape matching.

[0037] Specifically, the injection-molded structural part directly forms the upper and lower insertion interface devices during the molding process. The first insertion slot extends along the motor axis in the top region, and its opening width can be set slightly smaller than the outer diameter of a standard pipe fitting to achieve an interference fit. The second insertion slot forms an axially parallel double-slot structure in the bottom region, where the first slot wall adopts a combination design of a V-shaped top plate and a vertical side wall, and the second slot wall forms a third insertion slot through a horizontal top plate and a downward-turned edge. This structure can guide the pipe to enter at a predetermined angle during the insertion process.

[0038] Through the above technical solution, this application achieves integrated manufacturing of the motor housing and pipeline interface, eliminating the sealing gaskets and fastening bolts required for flange connections in traditional switching valves. This allows for positioning and sealing simply by pushing the connector into the corresponding slot during pipeline installation. The V-shaped top plate and vertical sidewall combination structure of the second insertion slot can automatically correct pipeline angle deviations during insertion, ensuring complete fit of the connection sealing surface.

[0039] This application further proposes that the second insertion groove 2 includes an axially parallel first groove wall and a second groove wall. The first groove wall includes a V-shaped first groove top plate 3, and vertical groove walls 1 are provided on both sides of the V-shaped groove top plate 3. The second groove wall includes a horizontal second groove top plate 4, and the two sides of the second groove top plate 4 are turned down to form a third insertion groove 5.

[0040] The V-shaped groove top plate refers to a top support structure with a V-shaped cross-sectional profile, whose two sloping sides form guide surfaces to guide the insertion trajectory of the connector. The vertical groove wall refers to an upright limiting structure perpendicular to the insertion direction, used to restrict the lateral displacement of the connector. The horizontal second groove top plate refers to a planar top support component whose horizontal surface provides the insertion contact surface. The third insertion groove refers to a U-shaped receiving space formed by the flanges on both sides of the second groove top plate, used to enhance the torsional resistance of the insertion structure.

[0041] Specifically, when the external connector is inserted axially into the second connector slot, the inclined surface of the V-shaped slot top plate guides the connector to automatically center and position itself, while the vertical slot wall constrains the lateral offset of the connector. The horizontal second slot top plate provides stable planar support, and the third connector slot forms an auxiliary fixing area through a downwardly extending flange, ensuring the connector maintains connection stability even under external forces. This structure achieves precise positioning and reliable fixation during the insertion process through the synergistic effect of multi-level limiting and guiding functions.

[0042] Compared to existing technologies, traditional interlocking slots often employ a single planar or arc-shaped structure, lacking effective guiding and limiting functions, resulting in repeated adjustments to the position of the interlocking components during installation. This solution utilizes a combination design of a V-shaped slot top plate and vertical slot walls to form a self-centering guiding system. Simultaneously, the flanged structure of the third interlocking slot enhances torsional resistance, significantly reducing the complexity of installation operations.

[0043] Through the above technical solution, this application effectively solves the problems of positioning difficulties and insufficient connection stability in the installation process of plug-in switching valves. The combination of the V-shaped guide structure and the multi-stage limiting device enables the plug-in part to be quickly and accurately aligned with the installation position, while the combination of the horizontal support surface and the flange structure ensures that the mechanical connection after plugging has anti-vibration and anti-torsion capabilities, thereby improving the overall assembly efficiency and operational reliability of the switching valve.

[0044] The above description is merely an embodiment of this application and is not intended to limit the scope of protection 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 protection of this application.

Claims

1. A plug-in switching valve, comprising a first straight pipe section (12) and a second straight pipe section (13) of integral structure, characterized in that: The second straight pipe section (13) has an inlet (33) at one end and is connected to the pipe wall of the first straight pipe section (12) at the other end. The first straight pipe section has an outlet (32) at one end and is connected to a motor (7) at the other end. The first straight pipe section has a valve port (18) inside. The motor (7) has a main shaft (20) and a valve core (19) that matches the valve port at the end of the main shaft (20). The outer shell of the motor (7) is an injection-molded structural component (9) and the injection-molded structural component (9) has a plug-in interface device.

2. The plug-in switching valve according to claim 1, characterized in that: The main shaft (20) is threaded on its outer circumference. The threaded outer circumference is fixedly connected to the nut adjustment seat (16) on the inner wall of the first straight pipe section (12). During the rotation driven by the motor (7), the main shaft (20) moves back and forth along the nut adjustment seat (16) to control the opening and closing of the valve port (18).

3. A plug-in switching valve according to claim 2, characterized in that: The nut adjusting seat (16) is a tubular structure. The outer wall of the tubular structure is sealed to the inner wall of the first straight pipe section (12) by a positioning ring (21) and a first sealing ring (22). The inner wall of the tubular structure is sealed to the outer wall of the main shaft (20) by a second sealing ring (17) and a third sealing ring (34) in parallel.

4. A plug-in switching valve according to claim 1, characterized in that: The first straight pipe section (12) is connected to the motor (7) with a flange (23) at one end. The flange (23) is connected to one side of the mounting plate (10) by a positioning screw (14), and the other side of the mounting plate (10) is connected to the motor (7).

5. A plug-in switching valve according to claim 1, characterized in that: The plug-in interface device includes an upper plug-in interface device and a lower plug-in interface device integrally formed with the injection-molded structural part (9); the upper plug-in interface device includes a first plug-in slot (8) located on the upper side of the motor (7); the lower plug-in interface device includes a second plug-in slot (2) located on the lower side of the motor (7).

6. A plug-in switching valve according to claim 5, characterized in that: The second insertion groove (2) includes a first groove wall and a second groove wall that are parallel to each other in the axial direction. The first groove wall includes a V-shaped first groove top plate (3), and vertical groove walls (1) are provided on both sides of the V-shaped groove top plate (3). The second groove wall includes a horizontal second groove top plate (4), and the two sides of the second groove top plate (4) are turned down to form a third insertion groove (5).

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