A multi-core coaxial multi-way valve

Abstract

The present invention provides a multi-core coaxial multi-way valve, which solves the technical problem that the multi-way valve driving mechanism leads to large size and high cost, and includes a control actuator, a valve body, and a valve core. The valve body is provided with a plurality of valve ports, and a valve core is installed inside. There are a plurality of valve cores, and they are coaxially connected. A sliding limit mechanism is provided between two adjacent valve cores, and a linkage mechanism is also provided inside. A circumferential limit structure is provided between the valve core and the valve body, and the circumferential limit structure works in coordination with the linkage mechanism. The present invention realizes the action of a single control actuator to drive multiple valve cores by adding a sliding limit mechanism, a circumferential limit structure, and a linkage mechanism in the sliding limit mechanism, and can be individually regulated, thereby reducing the overall size and production cost, being beneficial to space utilization, and can be widely used in the field of switch valve technology.

Description

Technical Field

[0001] The invention relates to the technical field of switch valves, and in particular to a multi-core coaxial multi-way valve. Background Art

[0002] Multi-way valves are common components in the field of fluid control, and the most common ones are rotary and plunger types. Taking the common rotary multi-way valve as the research object, due to the single valve core design, the multiple valve ports generally do not have the ability to be adjusted separately. Even if they can be adjusted separately, the valve core structure is relatively complex, which is not conducive to long-term use. There is also a type of valve group on the market, which realizes the separate control of multiple pipelines by connecting multiple valves in parallel or in series. Although this solves the adjustment problem, it occupies a large space and has a high cost. Taking new energy vehicles as an example, each vehicle uses at least 2-4 three-way water valves, and each water valve needs to be connected to three pipelines and a control actuator, which causes the pipelines in the car cabin to be complicated, and the space and cost pressure are relatively large during design; there is another type of double-core regulating valve, which adopts a double-core coaxial design and adds control actuators at both ends to achieve the ability to be adjusted separately. Although the volume is reduced to a certain extent, the use of two drive units still increases the overall cost, and the axial size is still large.

[0003] Chinese patent CN113864489A-A multi-way valve and Chinese patent CN112780805A-Valve seat and control valve of multi-channel control valve both disclose a technical solution of a single-drive double-core multi-way valve, the main structure of which is to achieve the goal of separate control and realize different combinations of valve port switches by cooperating with the fan-shaped sink and convex part between the double cores and combining the excessive rotation of the top valve core. Although the above technical solution solves the technical problem of too many drive units and reduces the axial size well, it can be seen from the specific technical solution that since there is no linkage limit structure between the two valve cores or between the valve core and the valve body, after the upper valve core drives the lower valve core to rotate into place, it is easily affected by its rotation, resulting in insufficient switching amplitude, or the valve port switch is unstable due to fluid impact. Summary of the invention

[0004] The present invention is to solve the deficiencies of the above-mentioned background technology and provides a multi-way valve which has a compact structure, is driven by a single power unit, and can be separately regulated.

[0005] To this end, the present invention provides a multi-core coaxial multi-way valve, comprising a control actuator, a valve body, and a valve core; the valve body comprises a valve cover and a valve seat; the valve body is also provided with a plurality of valve ports; the valve core is installed in a cavity surrounded by the valve cover and the valve seat;

[0006] There are a total of multiple valve cores, and they are coaxially connected; the top valve core is connected to the control actuator; the valve core body is a cylindrical structure, and at least one fluid channel is provided on the circumferential side, which is connected to two or more laterally adjacent valve ports through rotation; a sliding limit mechanism is provided between two adjacent valve cores; in two adjacent valve cores, the upper valve core drives the lower valve core to rotate through the sliding limit mechanism; a circumferential limit structure is provided between the valve core and the valve body, and a linkage mechanism is also provided in the sliding limit mechanism, and the circumferential limit structure cooperates with the linkage mechanism.

[0007] Preferably, the sliding limiting mechanism includes a first lower boss and a first sinker; the first lower boss is a downwardly convex prism or frustum structure, which is arranged on the lower end surface of the upper valve core; the first sinker is a fan-shaped sinker structure, which is arranged on the upper end surface of the lower valve core; the first lower boss is located in the first sinker and slides axially.

[0008] Preferably, the lower end surface of the upper valve core is also provided with a composite slide distributed along the circumferential direction; the linkage mechanism includes a pin and an open slide; the open slide is radially arranged on the upper end surface of the lower valve core, and the pin is slidably installed in the open slide; a limiting boss is provided on the upper surface of the pin, and the limiting boss is slidably matched with the composite slide.

[0009] Preferably, the circumferential limiting structure is a first convex ridge, and is axially arranged on the inner side surface of the valve body.

[0010] Preferably, a second lower boss is provided on the lower end surface of the valve core at the bottom, and the second lower boss is a downwardly convex prism or frustum structure; a second sinker is provided on the bottom surface on the inner side of the valve seat, and the second sinker is a fan-shaped structure. The second lower boss is located in the second sinker and slides axially.

[0011] Preferably, a first sealing gasket is provided between the valve core and the valve body.

[0012] Preferably, the cross-section of the first sealing gasket is a C-shaped structure, and an opening is provided on the first sealing gasket at a position corresponding to the valve port; and a limiting structure is provided between the first sealing gasket and the valve body.

[0013] Preferably, the limiting structure between the first sealing gasket and the valve body is a second ridge, and is axially arranged on the inner side surface of the valve body; a groove is correspondingly provided on the outer side of the first sealing gasket and cooperates with the second ridge.

[0014] Preferably, a valve port plate is fixedly connected to the valve body, and the valve port plate is a flat plate structure; the valve ports are all arranged on the mounting surface of the valve port plate, and are connected to the cavity of the valve body through a pipeline.

[0015] Preferably, a third recessed platform is provided on the mounting surface of the valve port plate, and a second sealing gasket is installed in the third recessed platform; an opening is provided on the second sealing gasket at a position corresponding to the valve port.

[0016] The present invention provides a multi-way valve, which has the following beneficial effects:

[0017] The present invention realizes the movement of multiple valve cores by a single control actuator through the added sliding limit mechanism, the circumferential limit structure and the linkage mechanism in the sliding limit mechanism, and can perform individual regulation, thereby reducing the overall size and production cost and facilitating space utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a stereogram of a specific embodiment of the present invention;

[0019] Figure 2 is an exploded view of a specific embodiment of the present invention;

[0020] Figure 3 is a lower side view of the upper valve core in a specific embodiment of the present invention;

[0021] Figure 4 is a cross-sectional view of the first lower boss and the composite slideway in a specific embodiment of the present invention;

[0022] Figure 5 It is an upper side view of the lower valve core in a specific embodiment of the present invention;

[0023] Figure 6 1 is a lower side view of the lower valve core in a specific embodiment of the present invention;

[0024] Figure 7 is a three-dimensional diagram of a valve seat in a specific embodiment of the present invention;

[0025] Figure 8 is a top view of a valve seat in a specific embodiment of the present invention;

[0026] Fig. 9 It is a flow chart of the upper valve core reversing in a specific embodiment of the present invention;

[0027] Fig.10 It is a flow chart of the reversing direction of the lower valve core in a specific embodiment of the present invention;

[0028] Markings in the figure: 1. control actuator, 2. valve body, 3. valve core, 4. first sealing gasket, 201. valve cover, 202. valve seat, 203. second sealing gasket, 301. upper valve core, 302. lower valve core, 2021. second sink, 2022. second ridge, 2023. first ridge, 3011. compound slide, 3012. first lower boss, 3021. pin, 3022. limiting boss, 3023. opening slide, 3024. first sink, 3025. second lower boss, 30111. first arc portion, 30112. second arc portion, 30113. third arc portion. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0030] The present invention provides a multi-core coaxial multi-way valve, such as Figure 1 , 2 As shown, it mainly includes a control actuator 1, a valve body 2 and a valve core 3. Among them, the valve body 2 is composed of a valve cover 201 and a valve seat 202. The valve body 2 is also provided with a plurality of valve ports; preferably, in order to facilitate installation and fixation, the valve ports are centrally arranged. In this embodiment, a total of 9 valve ports are designed, and they are arranged on the mounting surface of the valve port plate in a 3x3 arrangement. The valve port plate is a flat plate structure as a whole, and is fixedly connected to the valve body 2 through pipes connected to the rear ends of the valve ports. Nine openings are correspondingly processed on the circumferential side of the valve body 2 to make them connected. Furthermore, a third sink is provided on the mounting surface of the valve port plate, and a second sealing gasket 203 is installed in the third sink, and an opening is provided on the second sealing gasket at a position corresponding to the valve port, and in order to prevent installation dislocation due to human factors (considering that the dimensions of the valve port or the valve port plate in the length and width directions are different, and it is not necessarily a square structure), an error-proof design is added between the mounting surface of the valve port plate and the second sealing gasket 203, which can be specifically as follows Figure 2 , 7 As shown, a transverse ridge is added to the installation surface, and a corresponding groove is provided on the second sealing gasket 203. Only when the ridge matches the groove can the sealing gasket be correctly installed.

[0031] A valve core 3 is installed in the cavity surrounded by the valve cover 201 and the valve seat 202. Specifically, multiple valve cores can be installed coaxially. For the sake of convenience, two valve cores are taken as an example in this embodiment. It should be noted that, in principle, in the description of multiple valve cores, of any two adjacent valve cores, the valve core located on the side close to the control actuator 1 is the upper valve core, and the valve core located on the side close to the bottom surface of the valve seat 202 is the lower valve core. Considering that there are a total of two valve cores in this embodiment, the upper valve core or the lower valve core is referred to in a fixed manner in the following description, and there is no need to redisting the upper and lower levels according to the scene. Therefore, in this embodiment, from top to bottom, the two valve cores are the upper valve core 301 and the lower valve core 302, and the two valve cores are coaxially connected and can rotate relative to each other. A driving shaft is provided on the upper part of the upper valve core 301, and a toothed key is processed at the end, and it passes through the center hole of the valve cover 201 to be connected to the output shaft of the control actuator 1. The main bodies of the two valve cores 3 are both cylindrical structures, such as Figure 2 , 3 As shown, the circumferential side surface of the upper valve core 301 is provided with a concave arc-shaped fluid channel in the horizontal direction, which corresponds to the three valve ports in the upper row of the nine valve ports, and can be connected to the middle and any one of the valve ports on the two sides in the horizontal direction by rotating; Figure 2 , 5 As shown in Figure 6, the side surface of the lower valve core 302 is divided into two layers, each with a concave arc-shaped fluid channel in the horizontal direction, corresponding to the 9 valve ports, the middle row and the lower row have a total of 6 valve ports, and the two rows can be synchronously connected to the middle and any one of the valve ports on the two sides in the horizontal direction by rotation. A sliding limit mechanism is provided between the upper valve core 301 and the lower valve core 302; preferably, combined with Figure 3-5 As shown, the sliding limit mechanism includes a first lower boss 3012 and a first sinker 3024. The first lower boss 3012 is a downwardly convex quadrangular platform structure with a fan-shaped cross section, and is arranged on the lower end surface of the upper valve core; the first sinker 3024 is a sinker structure with a fan-shaped cross section, and is arranged on the upper end surface of the lower valve core 302. In this way, the fan-shaped opening angle of the first sinker 3024 is designed to be larger than the fan-shaped opening angle of the first boss 3012, such as close to 360° in the figure, so that during the coaxial connection process, the first lower boss 3012 is inserted into the first sinker 3024, which can make it slide around the axis. When the first boss 3012 slides to the ends of the two ends of the first sinker 3024, the upper valve core 301 continues to rotate, which can drive the lower valve core 302 to rotate.

[0032] At the same time, in order to reduce the mutual influence between the upper and lower valve cores at special positions, and to avoid the lower valve core 302 from rotating due to fluid impact, a circumferential limit structure is provided between the valve core 3 and the valve body 2, and a linkage mechanism is also designed in the sliding limit mechanism, so that the circumferential limit structure and the linkage mechanism cooperate to perform special position limiting actions.

[0033] Preferably, Figure 3 ,4 As shown, the lower end surface of the upper valve core 301 is also provided with a composite slide 3011 distributed along the circumferential direction. The slide is a recessed structure. The specific purpose of using the composite slide is to limit the movable parts according to fixed rules. Therefore, the slide style can be in various situations. In this embodiment, a segmented structure is adopted. As shown in the figure, the composite slide 3011 includes a first arc portion 30111, a second arc portion 30112, and a third arc portion 30113. Among them, the first arc portion 30111 has two sections, which are respectively located at the two ends of the third arc portion 30113, and are connected to the third arc portion 30113 through the second arc portion 30112. The radius R2 of the third arc portion 30113 is greater than the radius R1 of the first arc portion 30111.

[0034] The linkage mechanism includes a pin 3021 and an open slide 3023. The open slide 3023 is radially arranged on the upper end surface of the lower valve core 302, and the pin 3021 is slidably installed in the open slide 3023. In this embodiment, considering the structural strength and stability issues, the pin 3021 is designed to adopt an inverted T-shaped structure, the tail is inserted into the open slide 3023, and the outer end of the open slide 3023 is designed as a sink for receiving the head of the pin 3021. A cylindrical limiting boss 3022 is also provided on the upper surface of the pin 3021. The limiting boss 3022 is slidably matched with the composite slide 3011. As the limiting boss 3022 is in different positions in the composite slide 3011, the corresponding pin 3021 extends along the open slide 3023 to different lengths.

[0035] Preferably, the circumferential limiting structure is a first convex ridge 2023, such as Figure 7 , 8 As shown, it is axially arranged on the inner side of the valve seat 202.

[0036] Preferably, Figure 6 As shown, in order to increase stability and prevent the lower valve core 302 from rotating excessively, a second lower boss 3025 is further provided on the lower end surface of the lower valve core 302, and the structure is also a quadrangular boss with a fan-shaped cross section. Figure 8 As shown, a second sink 2021 is provided on the bottom surface of the inner side of the valve seat 202. The second sink 2021 is also a fan-shaped structure in cross section. The second lower boss 3025 is located in the second sink 2021 and can slide around the axial direction.

[0037] Preferably, Figure 2As shown, in order to ensure the overall sealing, a first sealing gasket 4 is provided between the valve core 3 and the valve seat 202. Furthermore, the cross-section of the first sealing gasket 4 is a C-shaped structure, and an opening is provided on the first sealing gasket 4 at the position corresponding to the valve port. The C-shaped opening of the first sealing gasket 4 corresponds to the position of the first ridge 2023, the purpose of which is to leave an avoidance space so that the pin 3021 can cooperate with the first ridge 2023. At the same time, in order to ensure that the position between the first sealing gasket 4 and the valve seat 202 is fixed and will not rotate with the valve core 3, a limiting structure is provided therebetween. Specifically, the limiting structure includes a plurality of second ridges 2022, and is axially arranged on the inner side of the valve seat 202. Correspondingly, a card groove is provided on the outer side of the first sealing gasket 4, and is installed in cooperation with the second ridge 2022 to limit the circumferential position of the first sealing gasket 4.

[0038] Spool change process

[0039] Combination Figure 9-10 As shown, with the current fluid entering from the middle and exiting from the right as the initial state, the left view in the two figures is a cross-sectional view of the cooperation between the upper valve core 301 and the lower valve core 302; the right view is a cross-sectional view of the cooperation between the lower valve core 302 and the valve seat 202.

[0040] The upper valve core 301 and the lower valve core 302 are misaligned and connected: starting from the initial state, the upper valve core 301 rotates in the direction of the left arrow. At this time, since the limiting boss 3022 is located in the third arc portion 30113, the pin 3021 is in a pop-up state and abuts against the first convex ridge 2023, and the second lower boss 3025 at the bottom of the lower valve core 302 cooperates with the second sink 2021, so that the lower valve core 302 cannot rotate in both directions until the upper valve core 301 moves to Fig. 9 The state shown in the lower middle view also causes the right path of the upper row of valve ports to be closed, while the middle and left paths are connected; while the valve ports of the middle and lower rows still maintain the middle and right paths connected.

[0041] The upper valve core 301 and the lower valve core 302 are connected on the same side: starting from the above state, as Fig.10 As shown in the upper view, the upper valve core 301 rotates excessively under the drive of the control actuator 1. During the process, the limit boss 3022 slides into the first arc portion 30111 through the second arc portion 30112, and the pin 3021 retracts and avoids the first convex ridge 2023; then, with the first lower boss 3012 pressing against the end of the first sink 3024, the lower valve core 302 is driven to rotate to the other side, so that the left path of the valve ports in the middle and lower rows is connected to the middle path, and the right path is closed. Fig.10As shown in the lower view, the upper valve core 301 needs to return to the normal working position, which requires rotation (as shown in the direction of the arrow on the left); during the process, the limiting boss 3022 slides back to the third arc portion 30113 through the second arc portion 30112, and the pin 3021 is in a pop-up state and abuts against the first convex ridge 2023. Combined with the second lower boss 3025 at the bottom of the lower valve core 302 and the second sink 2021, the lower valve core 302 cannot rotate, and finally the upper valve core 301 returns to the working position to achieve conduction on the same side.

[0042] As described above, a total of four different combined conduction forms can be realized, and there is no need to add a control actuator 1. In other embodiments, multiple coaxial valve core operations can be performed, with the active valve core dragging multiple slave valve cores. It is only necessary to modify the size of each limit structure and add action steps in the action process. The principle is the same and will not be repeated.

[0043] Compared with the traditional multi-way combination valve, the overall structure reduces the cost by about 50%, saves 50% of the layout space, and achieves the purpose of integrated control.

[0044] In the description of the present invention, it is necessary to understand that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] However, the above are only specific embodiments of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A multi-core coaxial multi-way valve, comprising a control actuator, a valve body, and a valve core; the valve body comprises a valve cover and a valve seat; the valve body is also provided with a plurality of valve ports; the valve core is installed in a cavity enclosed by the valve cover and the valve seat; It is characterized in that There are multiple valve cores, which are coaxially connected; the valve core at the top is connected to the control actuator; the valve core body is a cylindrical structure, and at least one fluid channel is provided on the peripheral side surface, which connects two or more valve ports adjacent to each other laterally through rotation; a sliding limit mechanism is provided between two adjacent valve cores; in two adjacent valve cores, the upper valve core drives the lower valve core to rotate through the sliding limit mechanism; a circumferential limit structure is provided between the valve core and the valve body, and a linkage mechanism is also provided in the sliding limit mechanism, and the circumferential limit structure cooperates with the linkage mechanism; The lower end surface of the upper valve core is also provided with a composite slide distributed along the circumferential direction; the linkage mechanism includes a pin and an open slide; the open slide is radially arranged on the upper end surface of the lower valve core, and the pin is slidably installed in the open slide; a limiting boss is provided on the upper surface of the pin, and the limiting boss is slidably matched with the composite slide.

2. A multi-core coaxial multi-way valve according to claim 1, characterized in that: The sliding limiting mechanism includes a first lower boss and a first sinker; the first lower boss is a downwardly convex prism or frustum structure, which is arranged on the lower end surface of the upper valve core; the first sinker is a fan-shaped sinker structure, which is arranged on the upper end surface of the lower valve core; the first lower boss is located in the first sinker and slides around the axial direction.

3. A multi-core coaxial multi-way valve according to claim 1, characterized in that: The circumferential limiting structure is a first convex ridge and is axially arranged on the inner side surface of the valve body.

4. A multi-core coaxial multi-way valve according to any one of claims 1 to 3, characterized in that: A second lower boss is provided on the lower end surface of the valve core at the bottom, and the second lower boss is a downwardly convex prism or frustum structure; a second sink is provided on the bottom surface inside the valve seat, and the second sink is a fan-shaped structure. The second lower boss is located in the second sink and slides axially.

5. The multi-core coaxial multi-way valve according to claim 1, characterized in that: A first sealing gasket is provided between the valve core and the valve body.

6. A multi-core coaxial multi-way valve according to claim 5, characterized in that: The cross section of the first sealing gasket is a C-shaped structure, and an opening is provided on the first sealing gasket at a position corresponding to the valve port; a limiting structure is provided between the first sealing gasket and the valve body.

7. A multi-core coaxial multi-way valve according to claim 6, characterized in that: The limiting structure between the first sealing gasket and the valve body is a second convex ridge, and is axially arranged on the inner side surface of the valve body; a corresponding groove is arranged on the outer side of the first sealing gasket and cooperates with the second convex ridge.

8. The multi-core coaxial multi-way valve according to claim 1, characterized in that: The valve body is fixedly connected with a valve port plate, which is a flat plate structure; the valve ports are all arranged on the mounting surface of the valve port plate and are connected to the cavity of the valve body through a pipeline.

9. A multi-core coaxial multi-way valve according to claim 8, characterized in that: A third sink is provided on the mounting surface of the valve port plate, and a second sealing gasket is installed in the third sink; an opening is provided on the second sealing gasket at a position corresponding to the valve port.

Images