Double-linkage multi-way reversing valve

Abstract

The utility model discloses a double-linkage multi-way reversing valve which comprises a valve body, a duplex shaft, a first valve element, a second valve element, a first support, a second support, an opening and closing piece and a valve rod. The first valve element and the second valve element are both connected into the switching channel in a sliding mode, and the first valve element and the second valve element are arranged on the two sides of the flow channel. The first valve element is connected with the second valve element through a duplex shaft, and an annular groove is inwards formed in the middle section of the duplex shaft in the radial direction. The end, away from the second valve element, of the first valve element is connected with one end of the valve rod, and the other end of the valve rod is slidably connected to the opening-closing piece. The valve rod can move in the first support to drive the first valve element and the second valve element to move synchronously, that is, the valve elements on the two sides are operated through the opening and closing piece on one side at the same time, so that continuous opening and closing of the flow channels on the two sides are achieved, and the stability of downstream medium flow in the flow channel switching process is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of reversing valve, and particularly relates to a double linkage multi-way reversing valve. BACKGROUND

[0002] In the industrial fields of melt filtration and spinning, it is often necessary to switch the flow channel of high-temperature melt in the conveying pipeline. At present, this operation is generally realized by using a three-way reversing valve.

[0003] The existing three-way reversing valve is usually equipped with two independent valve cores and control devices, that is, one set of valve core, valve rod and driving mechanism is arranged on each side of the valve. The two sets of systems are independent of each other in operation and need to be manually controlled to open and close the action on both sides. However, in the working conditions of melt filtration and high continuity requirement of downstream process, the action of the valve cores on both sides cannot be guaranteed to be synchronous linkage, and it is difficult to maintain the stability of the downstream medium flow during the switching process, which easily causes flow fluctuation or even flow interruption. Flow fluctuation can lead to a decrease in product quality, and flow interruption can cause production interruption, thereby causing economic losses.

[0004] Therefore, a new valve structure is needed, which can ensure that the valve cores on both sides are synchronous linkage during the reversing process, so as to realize synchronous switching of the flow channel and ensure the reliable sealing of the valve. CONTENT OF THE INVENTION

[0005] The embodiment of the present application provides a double linkage multi-way reversing valve, which solves the problem of poor stability of downstream medium flow caused by asynchronous reversing of valve cores at both ends in the prior art.

[0006] The embodiment of the present application provides a double linkage multi-way reversing valve, which solves the problem of poor stability of downstream medium flow caused by asynchronous reversing of valve cores at both ends in the prior art.

[0007] In a possible implementation, the valve rod is further connected with a guide shaft in the circumferential direction; the first support is provided with a guide groove in the moving direction of the first valve core; and the guide shaft is slidably connected in the guide groove.

[0008] In a possible implementation, the double shaft coupling comprises a mounting portion, a positioning portion and a connecting portion; the connecting portion is sequentially connected with the positioning portion and the mounting portion at both ends; one of the positioning portions abuts against the end surface of the first valve core, and the mounting portion on the same side is connected with the first valve core; the other positioning portion abuts against the end surface of the second valve core, and the mounting portion on the same side is connected with the second valve core; and the diameter of the connecting portion is smaller than the diameter of the first valve core.

[0009] In a possible implementation, the valve further comprises an opening degree indicator; the opening degree indicator is connected to the outer side of the first support close to the guide groove.

[0010] In a possible implementation, the valve further comprises a first filler, a first gland, a second filler and a second gland; the first filler is arranged between the first valve core and the valve body; the first gland is sleeved on the outer side of the first valve core; one end of the first filler abuts against the end surface of the valve body, and the other end of the first filler abuts against the first gland; the second filler is arranged between the second valve core and the valve body; the second gland is sleeved on the outer side of the second valve core; one end of the second filler abuts against the end surface of the valve body, and the other end of the second filler abuts against the second gland.

[0011] In a possible implementation, the valve further comprises a first connecting piece, a second connecting piece and a gasket; the first valve core and the second valve core are respectively provided with a first mounting hole and a second mounting hole at the ends away from each other; the first connecting piece is arranged in the first mounting hole, and the first valve core is connected to one end of the double shaft coupling through the first connecting piece; the second connecting piece is arranged in the second mounting hole, and the second valve core is connected to the other end of the double shaft coupling through the second connecting piece; the gasket is arranged between the first connecting piece and the first valve core; and the gasket is arranged between the second connecting piece and the second valve core.

[0012] In a possible implementation, the valve further comprises a first special-shaped sealing piece and a first elastic piece; the first special-shaped sealing piece is sleeved on the outer side of the first connecting piece and can abut against the hole wall of the first mounting hole; one end of the first elastic piece abuts against the first special-shaped sealing piece, and the other end of the first elastic piece abuts against the end of the valve rod close to the first valve core.

[0013] In a possible implementation, the valve further comprises a second special-shaped sealing element, a second elastic element and a blocking block; the blocking block is connected to the second valve core away from the first valve core; the second special-shaped sealing element is sleeved outside the second connecting element and can abut against the hole wall of the second mounting hole; one end of the second elastic element abuts against the second special-shaped sealing element, and the other end of the second elastic element abuts against the blocking block.

[0014] In a possible implementation, the valve further comprises a radial sealing element and an axial sealing element; the radial sealing element is arranged between the first valve core and the corresponding mounting portion in a radial direction; and the axial sealing element is arranged between the first connecting element and the first valve core in an axial direction.

[0015] In a possible implementation, the outer side of the valve body is provided with a heat preservation jacket.

[0016] The one or more technical solutions provided in the application have at least the following technical effects:

[0017] The utility model discloses a kind of double linkage multi-pass reversing valves, including valve body, double shafts, first valve core, second valve core, first support, second support, opening and closing element and valve rod;First valve core and second valve core are both slidingly connected in switching channel, and first valve core and second valve core are arranged on the two sides of flow passage;First valve core is connected with second valve core by double shafts, and annular groove is radially opened in the middle section of double shafts;The end of first valve core away from second valve core is connected with the end of valve rod, and the other end of valve rod is slidingly connected on opening and closing element;Valve rod can move in first support, and first valve core and second valve core are synchronously moved by double shafts, that is, two valve cores on the two sides are operated simultaneously by one side opening and closing element, to realize the continuous opening and closing of the flow passage on the two sides, guarantee the stability of downstream medium flow in flow passage switching process, and the original two sets of valve rod and opening and closing element are reduced to a set, cost is saved.

[0018] Further, after valve rod installation is completed, first elastic element is in compression state, first special-shaped sealing element is sleeved outside first connecting element, and first special-shaped sealing element generates radial deformation under the elastic force of first elastic element, to realize good sealing;The application solves the problem that valve two-end reversing asynchronization leads to poor downstream medium flow stability in the prior art. Continuous opening and closing of the flow passage on the two sides is realized, the stability of downstream medium flow in flow passage switching process is guaranteed, the sealing effect of valve core is improved, and cost is saved. BRIEF DESCRIPTION OF DRAWINGS

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments of this utility model or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A front view of a dual-linkage multi-way directional valve provided in an embodiment of this application;

[0021] Figure 2 for Figure 1 AA section view;

[0022] Figure 3 A schematic diagram of a dual-linkage multi-way directional valve provided in an embodiment of this application;

[0023] Figure 4 A schematic diagram of the double coupling and the first valve core provided in an embodiment of this application;

[0024] Figure 5 for Figure 2 Enlarged view of point B.

[0025] Icons: 1-Valve body; 2-Double coupling; 21-Connecting part; 22-Positioning part; 23-Mounting part; 3-First valve core; 4-Second valve core; 5-First bracket; 6-Second bracket; 7-Opening and closing element; 8-Valve stem; 9-Guide shaft; 10-Opening degree indicator; 11-First packing; 12-First gland; 13-Second packing; 14-Second gland; 15-First connecting element; 16-Second connecting element; 17-Insulation jacket; 18-First elastic element; 19-Second elastic element; 201-First irregular seal; 202-Second irregular seal; 203-Axial seal; 204-Radial seal; 205-Washer; 206-Blocking block; 207-Limit pin. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0027] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0028] This utility model embodiment provides a dual-linkage multi-way reversing valve, such as Figures 1-5 As shown, the device includes a valve body 1, a double coupling 2, a first valve core 3, a second valve core 4, a first bracket 5, a second bracket 6, an opening / closing element 7, and a valve stem 8. The valve body 1 is a hollow structure with multiple flow channels. The valve body 1 has a switching channel for multiple flow channels. The valve body 1 is connected to the first bracket 5 and the second bracket 6 at both ends of the switching channel. The opening / closing element 7 is connected to the end of the first bracket 5 away from the valve body 1. The first valve core 3 and the second valve core 4 are slidably connected in the switching channel, and the first valve core 3 and the second valve core 4 are located on both sides of the inlet or outlet. The first valve core 3 is connected to the second valve core 4 through the double coupling 2, and the middle section of the double coupling 2 has an annular groove radially inward. The end of the first valve core 3 away from the second valve core 4 is connected to one end of the valve stem 8, and the other end of the valve stem 8 is slidably connected to the opening / closing element 7. The valve stem 8 moves within the first bracket 5, thereby driving the first valve core 3 and the second valve core 4 to move synchronously.

[0029] For example, depending on the requirements, the valve core on one side and the double coupling 2 can be made into an integrated structure, which can also achieve the purpose of controlling both sides simultaneously when operating on one side. Its advantage is that the valve core on one side and the double coupling 2 are designed as an integrated structure, which is convenient to install. In addition, the integrated structure eliminates the sealing structure between the double coupling 2 and the valve core on one side. Compared with the double linkage multi-way reversing valve that can be disassembled on both sides, the integrated structure has better sealing performance and is suitable for occasions where there is less disassembly and maintenance or where there are special disassembly tools.

[0030] For example, both the first connector 15 and the second connector 16 are made of screws. The two ends of the double coupling 2 are connected to the first valve core 3 and the second valve core 4 respectively by screws. Both sides can be disassembled separately. Compared with the integrated structure of one valve core and the double coupling 2, the method of installing with screws at both ends is more convenient to disassemble. During the installation and debugging process, the connectors on the first valve core 3 and the second valve core 4 need to be tightened to ensure good sealing inside the valve core.

[0031] For example, by operating the first valve core 3 and the second valve core 4 simultaneously through the opening and closing component 7 on one side, the continuous opening and closing of the flow channels on both sides can be achieved, ensuring the stability of the downstream medium flow rate during the flow channel switching process, facilitating the operation of on-site personnel, and reducing the original two sets of valve stems 8 and opening and closing components 7 into one set, thus saving costs.

[0032] For example, a vent valve is also provided on the flow channel of the dual-linkage multi-way reversing valve.

[0033] For example, the opening and closing component 7 includes a handwheel, a turbine, a worm gear, and a nut. The turbine and the worm gear mesh with each other, and the nut is threaded onto the worm gear. The nut is rotatably connected to the valve stem 8. The handwheel drives the turbine to rotate, thereby driving the worm gear and the nut to rotate. The rotation of the nut can drive the valve stem 8 to move linearly, thereby realizing the movement of the first valve core 3 and the second valve core 4 in the switching channel, that is, realizing the switching of the flow channel of the reversing valve.

[0034] In the embodiments of this application, such as Figures 1-5 As shown, it also includes a guide shaft 9; the valve stem 8 is circumferentially connected to the guide shaft 9; the first bracket 5 has a guide groove in the moving direction of the first valve core 3; the guide shaft 9 is slidably connected in the guide groove.

[0035] In the embodiments of this application, such as Figures 1-5 As shown, the double coupling 2 includes a mounting part 23, a positioning part 22, and a connecting part 21; both ends of the connecting part 21 are sequentially connected to the positioning part 22 and the mounting part 23; one of the positioning parts 22 abuts against the end face of the first valve core 3, and the mounting part 23 on the same side is connected to the first valve core 3; the other positioning part 22 abuts against the end face of the second valve core 4, and the mounting part 23 on the same side is connected to the second valve core 4; the diameter of the connecting part 21 is smaller than the diameter of the first valve core 3.

[0036] In the embodiments of this application, such as Figures 1-5 As shown, it also includes an opening indicator 10; the opening indicator 10 is connected to the outside of the first bracket 5 near the guide groove.

[0037] For example, the scale can also be printed onto the outer wall of the first bracket 5 by laser printing.

[0038] For example, both the first connector 15 and the second connector 16 are configured as screws, and by tightening the first connector 15 and the second connector 16, the corresponding axial seal 203 achieves a good seal.

[0039] In the embodiments of this application, such as Figures 1-5 As shown, it also includes a first packing 11, a first gland 12, a second packing 13, and a second gland 14; the first packing 11 is disposed between the first valve core 3 and the valve body 1; the first gland 12 is sleeved on the outside of the first valve core 3; one end of the first packing 11 abuts against the end face of the valve body 1, and the other end of the first packing 11 abuts against the first gland 12; the second packing 13 is disposed between the second valve core 4 and the valve body 1; the second gland 14 is sleeved on the outside of the second valve core 4; one end of the second packing 13 abuts against the end face of the valve body 1, and the other end of the second packing 13 abuts against the second gland 14.

[0040] In the embodiments of this application, such as Figures 1-5 As shown, it also includes a first connector 15, a second connector 16, and a washer 205; the first valve core 3 and the second valve core 4 are respectively provided with a first mounting hole and a second mounting hole at opposite ends; the first connector 15 is disposed in the first mounting hole, and the first valve core 3 is connected to one end of the double coupling 2 through the first connector 15; the second connector 16 is disposed in the second mounting hole, and the second valve core 4 is connected to the other end of the double coupling 2 through the second connector 16; a washer 205 is disposed between the first connector 15 and the first valve core 3; a washer 205 is disposed between the second connector 16 and the second valve core 4.

[0041] In the embodiments of this application, such as Figures 1-5 As shown, it also includes a first irregular seal 201 and a first elastic member 18; the first irregular seal 201 is sleeved on the outside of the first connector 15 and can abut against the wall of the first mounting hole; one end of the first elastic member 18 abuts against the first irregular seal 201, and the other end of the first elastic member 18 abuts against the end of the valve stem 8 near the first valve core 3.

[0042] In the embodiments of this application, such as Figures 1-5 As shown, it also includes a second irregular seal 202, a second elastic member 19, and a blocking block 206; the blocking block 206 is connected to the end of the second valve core 4 away from the first valve core 3; the second irregular seal 202 is sleeved on the outside of the second connector 16 and can abut against the wall of the second mounting hole; one end of the second elastic member 19 abuts against the second irregular seal 202, and the other end of the second elastic member 19 abuts against the blocking block 206.

[0043] In the embodiments of this application, such as Figures 1-5As shown, it also includes a radial seal 204 and an axial seal 203; a radial seal 204 is provided between the first valve core 3 and the corresponding mounting part 23 in the radial direction; an axial seal 203 is provided between the first connector 15 and the first valve core 3 in the axial direction.

[0044] For example, after the valve stem 8 is installed, the first elastic element 18 is in a compressed state, and the first irregularly shaped seal 201 is sleeved on the outside of the first connecting member 15. Under the elastic force of the first elastic element 18, the first irregularly shaped seal 201 undergoes radial deformation, thereby achieving a good seal. Furthermore, the first irregularly shaped seal 201 is made of rubber. Under the elastic force of the first elastic element 18, the first irregularly shaped seal 201 undergoes radial deformation, thereby preventing the first connecting member 15 from loosening. The stable installation of the first connecting member 15 enables the axial seal 203 to achieve a reliable sealing effect. The second irregularly shaped seal 202 works on the same principle as the first irregularly shaped seal 201.

[0045] For example, it also includes a limiting pin 207, which connects the first valve core 3 and the corresponding mounting part 23. The limiting pin 207 can limit the movement during installation, thereby improving the installation accuracy and preventing the double coupling 2 from rotating.

[0046] For example, a gasket 205 is provided between the axial seal 203 and the first connector 15. The first connector 15 presses the corresponding gasket 205 to achieve a good seal for the corresponding axial seal 203.

[0047] For example, a radial seal 204 is provided between the second valve core 4 and the corresponding mounting portion 23 in the radial direction; an axial seal 203 is provided between the second connector 16 and the second valve core 4 in the axial direction.

[0048] In the embodiments of this application, such as Figures 1-5 As shown, an insulation jacket 17 is provided on the outer side of the valve body 1.

[0049] For example, this application connects the first valve core 3 and the second valve core 4 via a double coupling 2, thereby enabling the first valve core 3 and the second valve core 4 to move synchronously. This ensures the stability of the downstream medium flow during valve switching, thus preventing medium flow interruption. The valve structure of this application is more compact, and the valve opening and closing process is more precisely controlled. Specifically, the valve stem 8 drives the first valve core 3 to move within the switching channel, and the double coupling 2 drives the second valve core 4 to move synchronously, thereby achieving continuity in the flow channel switching of the reversing valve.

[0050] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0051] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. A dual-linkage multi-way directional valve, characterized in that, It includes a valve body (1), a double coupling (2), a first valve core (3), a second valve core (4), a first bracket (5), a second bracket (6), an opening and closing component (7), and a valve stem (8); The valve body (1) is a hollow structure with multiple flow channels; The valve body (1) has multiple switching channels for the flow channels; The valve body (1) is connected to the first bracket (5) and the second bracket (6) at both ends of the switching channel, respectively. The opening and closing element (7) is connected to the end of the first bracket (5) away from the valve body (1); The first valve core (3) and the second valve core (4) are both slidably connected in the switching channel, and the first valve core (3) and the second valve core (4) are disposed on both sides of the flow channel; The first valve core (3) is connected to the second valve core (4) through the double coupling (2), and the middle section of the double coupling (2) has an annular groove radially inward; The end of the first valve core (3) away from the second valve core (4) is connected to one end of the valve stem (8), and the other end of the valve stem (8) is slidably connected to the opening and closing member (7); The valve stem (8) can move within the first bracket (5), thereby driving the first valve core (3) and the second valve core (4) to move synchronously.

2. The dual-linkage multi-way directional valve according to claim 1, characterized in that, It also includes a guide shaft (9); The valve stem (8) is circumferentially connected to the guide shaft (9); The first bracket (5) has a guide groove in the moving direction of the first valve core (3); The guide shaft (9) is slidably connected in the guide groove.

3. The dual-linkage multi-way directional valve according to claim 1, characterized in that, The twin shaft (2) includes a mounting part (23), a positioning part (22), and a connecting part (21). The two ends of the connecting part (21) are connected in sequence to the positioning part (22) and the mounting part (23). One of the positioning parts (22) abuts against the end face of the first valve core (3), and the mounting part (23) on the same side is connected to the first valve core (3); Another positioning part (22) abuts against the end face of the second valve core (4), and the mounting part (23) on the same side is connected to the second valve core (4); The diameter of the connecting part (21) is smaller than the diameter of the first valve core (3).

4. The dual-linkage multi-way directional valve according to claim 2, characterized in that, It also includes an opening indicator (10); The opening indicator (10) is connected to the outside of the first bracket (5) near the guide groove.

5. The dual-linkage multi-way directional valve according to claim 1, characterized in that, It also includes a first packing (11), a first gland (12), a second packing (13), and a second gland (14); The first packing (11) is disposed between the first valve core (3) and the valve body (1); The first pressure cap (12) is sleeved on the outside of the first valve core (3); One end of the first packing (11) abuts against the end face of the valve body (1), and the other end of the first packing (11) abuts against the first gland (12); The second packing (13) is disposed between the second valve core (4) and the valve body (1); The second pressure cap (14) is sleeved on the outside of the second valve core (4); One end of the second packing (13) abuts against the end face of the valve body (1), and the other end of the second packing (13) abuts against the second gland (14).

6. The dual-linkage multi-way directional valve according to claim 3, characterized in that, It also includes a first connector (15), a second connector (16), and a washer (205); The first valve core (3) and the second valve core (4) are respectively provided with a first mounting hole and a second mounting hole at opposite ends; The first connector (15) is disposed in the first mounting hole, and the first valve core (3) is connected to one end of the double coupling (2) through the first connector (15); The second connector (16) is disposed in the second mounting hole, and the second valve core (4) is connected to the other end of the double coupling (2) through the second connector (16); The gasket (205) is provided between the first connector (15) and the first valve core (3). The gasket (205) is provided between the second connector (16) and the second valve core (4).

7. The dual-linkage multi-way directional valve according to claim 6, characterized in that, It also includes a first irregular seal (201) and a first elastic element (18); The first irregular seal (201) is sleeved on the outside of the first connector (15) and can abut against the wall of the first mounting hole; One end of the first elastic element (18) abuts against the first irregular seal (201), and the other end of the first elastic element (18) abuts against the end of the valve stem (8) near the first valve core (3).

8. The dual-linkage multi-way directional valve according to claim 6, characterized in that, It also includes a second irregular seal (202), a second elastic element (19) and a blocking block (206); The blocking block (206) is connected to the end of the second valve core (4) away from the first valve core (3); The second irregular seal (202) is sleeved on the outside of the second connector (16) and can abut against the wall of the second mounting hole; One end of the second elastic member (19) abuts against the second irregular seal (202), and the other end of the second elastic member (19) abuts against the blocking block (206).

9. The dual-linkage multi-way directional valve according to claim 6, characterized in that, It also includes a radial seal (204) and an axial seal (203); A radial seal (204) is provided between the first valve core (3) and the corresponding mounting part (23) in the radial direction. The first connector (15) and the first valve core (3) are provided with the axial seal (203) in the axial direction.

10. The dual-linkage multi-way directional valve according to claim 1, characterized in that, The valve body (1) is provided with a heat insulation jacket (17) on the outside.

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